CN112586030B

CN112586030B - System information block SIB transmission method and device

Info

Publication number: CN112586030B
Application number: CN201880094029.7A
Authority: CN
Inventors: 韩金侠; 李振宇; 南杨; 李铮; 张武荣
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-05-30
Filing date: 2018-05-30
Publication date: 2022-11-11
Anticipated expiration: 2038-05-30
Also published as: CN112586030A; WO2019227361A1

Abstract

The embodiment of the application discloses an SIB transmission method and SIB transmission equipment, which relate to the field of communication and can effectively reduce the time delay of terminal equipment accessing a network. The specific scheme is as follows: in a first period in a time domain, repeating and sending SIB for N times, wherein the first period comprises m second periods, when N is larger than or equal to m, the repetition frequency of SIB in each second period from 1 st second period to m-1 th second period in the m second periods is formula (I), the repetition frequency of SIB in the m second period is formula (II), N is a positive integer larger than 0, m is a positive integer larger than 0, and formula (III) represents rounding-up. The embodiment of the application is used in the SIB sending process. The method provided by the embodiment can be applied to communication systems, such as V2X, LTE-V, V V, internet of vehicles, MTC, ioT, LTE-M, M2M, internet of things and the like. Formula (I)

. Formula (II)

. Formula (III)

。

Description

System information block SIB transmission method and device

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for SIB transmission.

Background

The technology of narrowband band internet of things (NB-IoT) is an emerging technology in the field of the Internet of things, supports cellular data connection of low-power consumption equipment in a wide area network, and has the characteristics of wide coverage, more connections, high speed, low cost, low power consumption, excellent architecture and the like. The narrowband internet of things may also be referred to as a low-power wide-area network (LPWAN). In order to fully utilize spectrum resources, the MulteFire alliance (MFA) proposes unlicensed spectrum based narrowband internet of things (NB-IoT-U) technology. NB-IoT-U has the technical features of NB-IoT, but in order to adapt unlicensed spectrum regulations (e.g., the spectrum regulations of the Federal Communications Commission (FCC) and the spectrum regulations of the European Telecommunications Standards Institute (ETSI)), some modifications are made to adapt the unlicensed spectrum regulations based on the NB-IoT frame structure. For example, according to the current MFA regulations, under the FCC regulations, one frame structure of NB-IoT-U is that uplink and downlink conform to the frequency hopping regulation, another possible frame structure is that uplink conforms to the frequency hopping regulation, downlink conforms to the digital modulation regulation, a third possible frame structure is that uplink conforms to the frequency hopping regulation, and downlink is a hybrid mode, i.e., a primary fixed (primary) channel part (or primary fixed segment) conforms to the digital modulation regulation, and a data channel part (or data segment) conforms to the frequency hopping regulation. Under the ETSI regulation, the NB-IoT-U frame structure is a frame structure that meets the duty cycle requirements.

For any of the above frame structures, the system information may be transmitted according to a uniform format. Fig. 1 is a schematic structural diagram of a System Information Block (SIB) transmission in an NB-IoT-U system according to the prior art. As shown in fig. 1, regardless of the number of SIB repetitions, the SIB with the specified number of repetitions is transmitted on a plurality of previous consecutive valid downlink subframes within the fixed channel period. If the SIB period includes two fixed channel periods, the SIB is transmitted in a single fixed channel period, and no SIB is transmitted in the other fixed channel period. In this case, if the terminal device completes receiving a Master Information Block (MIB) within a fixed channel period in which no SIB is transmitted, it needs to wait for one fixed channel period to receive the SIB again. Therefore, the time delay of the terminal equipment for cell initial access is increased.

Disclosure of Invention

The embodiment of the application provides an SIB transmission method and equipment, which can effectively reduce the time delay of accessing a terminal equipment to a network.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect of the embodiments of the present application, an SIB transmission method is provided, including: in a first period in a time domain, the SIB is repeatedly sent N times, where the first period includes m second periods, and as can be understood, the first period duration is m times of the second period duration, N is a positive integer greater than 0, and m is a positive integer greater than 0. When N is greater than or equal to m, the number of times of repeating SIB in each of the 1 st to m-1 st second cycles is set to

The number of repetitions of the SIB in the mth of the m second periods is

Indicating rounding up. The transmission entity for transmitting the SIB may be a base station or a chip of the base station. The receiving entity for receiving the SIB may be a terminal device or a chip of the terminal device. In the SIB transmission method provided in the embodiment of the present application, N times of SIBs repeatedly transmitted in a first period in a time domain are distributed in a second period in a distributed manner, so that a terminal device does not need to wait for the second period to receive the SIB again, thereby reducing the number of SIBs transmitted in the first period in the time domainThe time delay of the terminal equipment for cell initial access is reduced.

For the SIB to be transmitted in each of the 1 st second period to the m-1 st second period of the m second periods, the SIB may be transmitted in the following specific implementation manners:

first implementable manner, transmitted in every 1 st second cycle to m-1 st second cycle of m second cycles

Secondary SIBs may be transmitted at equal intervals, transmitted in each second period

Secondary SIB occupancy

And each SIB transmitted occupies one time cell. The duration of a time unit is

T2 denotes the second cycle duration. Alternatively, the duration of the time unit may also be 160 milliseconds.

Second implementable manner, transmitted in every 1 st second cycle to m-1 st second cycle of m second cycles

Secondary SIB occupancy

The time unit is a unit of time,

the time units are continuously transmitted, and SIB transmitted each time occupies one time unit. The duration of the time unit may also be 160 milliseconds.

With reference to the first implementation manner and the second implementation manner, further, each transmitted SIB occupies p consecutive downlink subframes, where p is a positive integer greater than 0. For example, each transmitted SIB occupies 8 consecutive downlink subframes. Or, the SIB transmitted each time occupies 4 consecutive downlink subframes.

Third mode of realization, the signal transmitted in each of the 1 st second cycle to the m-1 st second cycle of the m second cycles

The secondary SIBs may be transmitted continuously or,

the sub-transmitted SIBs occupying consecutive

And p is the number of downlink subframes occupied by one SIB transmission, such as p =8.

The SIB to be transmitted in the mth second period of the m second periods may be transmitted in the following specific implementation manners:

first implementable manner, transmitted in the mth second cycle of the m second cycles

Secondary SIBs may be transmitted at equal intervals, transmitted during the m-th second period

Secondary SIB occupancy

And each SIB transmitted occupies one time cell. The duration of a time unit is

Second implementable mode, transmitted in the m second period of the m second periods

Secondary SIB occupancy

The time unit is a unit of time,

the SIBs are transmitted continuously in time units, and each transmitted SIB occupies one time unit. The duration of the time unit may also be 160 milliseconds.

In a third implementation, the data is transmitted in the mth second cycle of the m second cycles

The secondary SIBs may be transmitted continuously or,

the sub-transmitted SIBs occupying consecutive

* p downlink subframes, where p is the number of downlink subframes occupied by one SIB transmission, for example, p =8.

In combination with the above possible implementation manners, in a specific implementation manner, N is a positive integer and N is an integer power of 2, m is a positive integer and m is an integer power of 2, N is greater than or equal to m, and the number of repetitions of the SIB in each of the m second periods is N/m.

The SIB to be transmitted in each of the m second periods may be transmitted in the following specific implementation manners:

in a first implementation manner, if the SIBs are transmitted at equal intervals in N/m times in each second period, the SIBs transmitted in N/m times in each second period occupy N/m time units, and each transmitted SIB occupies one time unit. The duration of the time cell is T2 × m/N, T2 representing the duration of the second cycle. Alternatively, the time unit is 160 milliseconds in duration.

In a second implementation manner, the SIBs transmitted in each second period occupy N/m time cells, and the N/m time cells are continuously transmitted, and the SIBs transmitted each time occupy one time cell. The duration of a time unit is 160 milliseconds.

In a third implementation manner, if the SIB is continuously transmitted N/m times in each second period, the SIB transmitted N/m times occupies N × p/m consecutive downlink subframes, where p is the number of downlink subframes occupied by one SIB transmission, for example, p =8.

Therefore, the SIBs repeatedly sent in the first period in the time domain are uniformly distributed in the second period, so that the terminal device does not need to wait for the second period to receive the SIBs, thereby reducing the time delay of the terminal device for cell initial access.

With reference to any one of the foregoing possible implementation manners, in another possible implementation manner, the starting time of sending the SIB for the first time in each second period is a time offset by a preset offset value from the starting time of the second period to which the SIB for the first time belongs.

If the SIB is transmitted at equal intervals N/m times in each second period, the duration of the time cell is T2 × m/N or 160ms, in another possible implementation manner, the starting time of transmitting the SIB in each time cell is a time shifted by a preset offset value from the starting time of the time cell.

If N/m time units are continuously transmitted in each second period, the duration of the time unit is 160ms, in another possible implementation manner, the starting time of transmitting the SIB in each time unit is a time offset from the starting time of the time unit by a preset offset value.

Wherein, the preset offset value may be pre-configured; or, a preset offset value is carried by the MIB. The preset offset value may be 40 milliseconds.

Optionally, since the duration of the primary fixed channel is determined, the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel. For example, the start time of the first transmission of the SIB in each second period is a time shifted by the main fixed channel duration and the preset offset value from the start time of the second period to which the first transmission of the SIB belongs. The starting time of sending the SIB in each time cell is the time of shifting the main fixed channel duration and the preset offset value from the starting time of the time cell. In this case, the preset offset value may be a time length pre-configured by the base station device, or a data channel time length, for example, the preset offset value is 20ms. It should be noted that, hereinafter, a data channel may also be referred to as a data segment.

In addition, when N is less than m, the number of transmission of the SIB in each second period in the first N second periods is 1, and the number of transmission of the SIB in each second period in the last m-N second periods is 0, from the first second period. For the specific transmission manner of the SIB that needs to be transmitted in each of the first N second periods and other possible implementation manners, reference may be made to the above detailed description when N is greater than or equal to m, and details of the embodiment of the present application are not described herein again.

In a second aspect of the embodiments of the present application, an SIB transmission method is provided, including: in a first period in a time domain, receiving SIB N times, where the first period includes m second periods, and as can be understood, the first period duration is m times of the second period duration, N is a positive integer greater than 0, and m is a positive integer greater than 0. When N is greater than or equal to m, the number of repetitions of the SIB in each of the 1 st to m-1 st second cycles is

The number of repetitions of the SIB in the mth second period of the m second periods is

Indicating rounding up. The transmission entity for transmitting the SIB may be a base station or a chip of the base station. The receiving entity for receiving the SIB may be a terminal device or a chip of the terminal device. In the SIB transmission method provided in the embodiment of the present application, N times of SIBs that are repeatedly sent in a first period in a time domain are distributed in a second period in a distributed manner, so that a terminal device does not need to wait for the second period to receive the SIB again, thereby reducing a time delay for the terminal device to perform cell initial access.

Secondary SIB occupancy

And each SIB transmitted occupies one time cell. The duration of a time unit is

Secondary SIB occupancy

The time of each of the time units is calculated,

With reference to the first implementation manner and the second implementation manner, further, each transmitted SIB occupies p consecutive downlink subframes, where p is a positive integer greater than 0. For example, the SIB transmitted each time occupies consecutive 8 downlink subframes. Or, the SIB transmitted each time occupies 4 consecutive downlink subframes.

The secondary SIBs may be transmitted continuously or,

the sub-transmitted SIBs occupying consecutive

The SIB required to be transmitted in the mth second period of the m second periods may be transmitted in the following specific implementation manners:

The secondary SIBs may be transmitted at equal intervals, during the m-th second period

Secondary SIB occupancy

And each SIB transmitted occupies one time cell. The duration of a time unit is

Second implementable manner, transmitted in the mth second period of the m second periods

Secondary SIB occupancy

The time unit is a unit of time,

The secondary SIBs may be transmitted continuously or,

the sub-transmitted SIBs occupying consecutive

* p downlink subframes, p is one SIB transmission occupationThe number of downlink subframes is, for example, p =8.

Therefore, the SIB repeatedly sent in the first period in the time domain is uniformly distributed in the second period, so that the terminal device does not need to wait for the second period to receive the SIB, thereby reducing the time delay of the terminal device for cell initial access.

Wherein, the preset offset value can be configured in advance; or, a preset offset value is carried by the MIB. The preset offset value may be 40 milliseconds.

Optionally, since the duration of the primary fixed channel is determined, the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel. For example, the start time of the first transmission of the SIB in each second period is a time shifted by the main fixed channel duration and the preset offset value from the start time of the second period to which the first transmission of the SIB belongs. The starting time of sending the SIB in each time cell is the time of shifting the main fixed channel duration and the preset offset value from the starting time of the time cell. In this case, the preset offset value may be a time length pre-configured by the base station device, or a data channel time length, for example, the preset offset value is 20ms.

In a third aspect of the embodiments of the present application, a wireless communication apparatus is providedThe communication device is a base station or a chip of the base station, and the wireless communication device comprises: a sending unit, where the sending unit is configured to repeatedly send an SIB for N times in a first period in a time domain, where the first period includes m second periods, and as can be understood, a duration of the first period is m times a duration of the second period, N is a positive integer greater than 0, and m is a positive integer greater than 0. When N is greater than or equal to m, the number of repetitions of the SIB in each of the 1 st to m-1 st second cycles is

Indicating rounding up.

In a fourth aspect of the embodiments of the present application, there is provided a wireless communication apparatus, where the wireless communication apparatus is a terminal device or a chip of the terminal device, and the wireless communication apparatus includes: a receiving unit, where the receiving unit is configured to receive an SIB for N times in a first period in a time domain, where the first period includes m second periods, and as can be understood, a duration of the first period is m times a duration of the second period, N is a positive integer greater than 0, and m is a positive integer greater than 0. When N is greater than or equal to m, the number of repetitions of the SIB in each of the 1 st to m-1 st second cycles is

The number of repetitions of the SIB in the mth of the m second periods is

With reference to the third aspect and the fourth aspect, for the SIB to be transmitted in each of the 1 st second period to the m-1 st second period in the m second periods, the SIB may be transmitted in the following specific implementation manners:

in a first implementation manner, the signals are transmitted from the 1 st second period to each of the m-1 st second periods

Secondary SIB occupancy

And each SIB transmitted occupies one time cell. The duration of a time unit is

Secondary SIB occupancy

The time of each of the time units is calculated,

The secondary SIBs may be transmitted continuously or,

occupation of sub-transmitted SIBs continuously

Secondary SIB occupancy

And each SIB transmitted occupies one time cell. The duration of a time unit is

Secondary SIB occupancy

The time of each of the time units is calculated,

The secondary SIBs may be transmitted continuously or,

the sub-transmitted SIBs occupying consecutive

* p downlink subframes, p being downlink subframe occupied by one SIB transmissionNumber, such as p =8.

With reference to the first implementation manner and the second implementation manner, further, each SIB sent occupies p consecutive downlink subframes, where p is a positive integer greater than 0. For example, each transmitted SIB occupies 8 consecutive downlink subframes. Or, the SIB transmitted each time occupies 4 consecutive downlink subframes.

Optionally, since the duration of the primary fixed channel is determined, the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel. For example, the starting time of the first SIB transmission in each second period is a time shifted by the main fixed channel duration and the preset offset value from the starting time of the second period to which the first SIB transmission belongs. The starting time of sending the SIB in each time cell is the time of shifting the main fixed channel duration and the preset offset value from the starting time of the time cell. In this case, the preset offset value may be a time length pre-configured by the base station device, or a data channel time length, for example, the preset offset value is 20ms.

It should be noted that the functional modules in the third aspect and the fourth aspect may be implemented by hardware, or may be implemented by hardware to execute corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions. For example, a transceiver for performing the functions of the receiving unit and the transmitting unit, a processor for performing the functions of the processing unit, and a memory for storing program instructions for the processor to process the SIB transmission method according to the embodiment of the present application. The processor, transceiver and memory are connected by a bus and communicate with each other. In particular, reference may be made to the functionality of the behavior of the sending entity in the SIB transmission provided by the first aspect, and the functionality of the behavior of the receiving entity in the SIB transmission provided by the second aspect.

In a fifth aspect, an embodiment of the present application provides an apparatus, including: a processor, a memory, a bus, and a transceiver; the memory is used for storing computer-executable instructions, the processor is connected with the memory through the bus, and when the processor runs, the processor executes the computer-executable instructions stored in the memory so as to enable the device to execute the method of any aspect.

In particular, when the apparatus is a base station, the transceiver is configured to perform the function of the transmitting unit. When the device is a terminal device, the transceiver is used for completing the function of the receiving unit.

In a sixth aspect, embodiments of the present application provide a computer-readable storage medium for storing computer software instructions for the apparatus described above, which when executed on a computer, enable the computer to perform the method of any of the above aspects.

In a seventh aspect, embodiments of the present application provide a computer program product containing instructions, which when executed on a computer, enable the computer to perform the method of any of the above aspects.

In addition, the technical effects brought by any one of the design manners in the third aspect to the seventh aspect can be referred to the technical effects brought by the different design manners in the first aspect to the second aspect, and are not described herein again.

In the embodiments of the present application, the names of the base station, the terminal device, and the wireless communication apparatus do not limit the devices themselves, and in actual implementation, the devices may appear by other names. Provided that the function of each device is similar to the embodiments of the present application, and fall within the scope of the claims of the present application and their equivalents.

These and other aspects of the embodiments of the present application will be more readily apparent from the following description of the embodiments.

Drawings

FIG. 1 is a schematic diagram of a prior art NB-IoT-U system for transmitting SIBs;

FIG. 2 is a simplified schematic diagram of a pass-through system provided by an embodiment of the present application;

fig. 3 is a flowchart of an SIB transmission method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of sending an SIB according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another SIB transmission structure according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another SIB transmission according to an embodiment of the present application;

FIG. 7 is a diagram illustrating a prior art structure for sending SIB including a secondary fixed channel;

fig. 8 is a schematic structural diagram of an SIB transmission including a secondary fixed channel according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another SIB transmission according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating a structure of another SIB transmission according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another SIB transmission according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another SIB transmission according to an embodiment of the present invention;

FIG. 13 is a block diagram illustrating another example of an SIB transmission according to an embodiment of the present invention;

FIG. 14 is a block diagram illustrating another example of sending SIBs according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of still another SIB transmission embodiment according to the present application;

FIG. 16 is a block diagram illustrating another example of sending SIBs according to an embodiment of the present invention;

FIG. 17 is a block diagram illustrating another example of sending SIBs according to an embodiment of the present invention;

FIG. 18 is a block diagram illustrating another example of an SIB transmission according to an embodiment of the present invention;

FIG. 19 is a block diagram illustrating another example of sending SIBs according to an embodiment of the present invention;

FIG. 20 is a block diagram illustrating another example of sending SIBs according to an embodiment of the present invention;

FIG. 21 is a flowchart of another SIB transmission method according to an embodiment of the present invention;

fig. 22 is a schematic diagram of a frame structure of an NB-IoT-U according to an embodiment of the present disclosure;

fig. 23 is a schematic diagram of a frame structure of another NB-IoT-U provided in an embodiment of the present application;

fig. 24 is a schematic diagram of a frame structure of yet another NB-IoT-U provided in an embodiment of the present application;

fig. 25 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

fig. 26 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure;

fig. 27 is a schematic structural diagram of another base station according to an embodiment of the present application;

fig. 28 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 29 is a schematic structural diagram of another base station according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 2 shows a simplified schematic diagram of a communication system to which embodiments of the present application may be applied. As shown in fig. 2, the communication system may include: a base station 201 and a terminal device 202.

The base station 201 may be a Base Station (BS) or a base station controller (bsc) for wireless communication. Specifically, the base station may include a user plane base station and a control plane base station. A base station is a device deployed in a radio access network to provide a wireless communication function for a terminal device 202, and its main functions are: management of radio resources, compression of Internet Protocol (IP) headers and encryption of user data streams, selection of Mobility Management Entity (MME) when a user equipment is attached, routing of user plane data to Serving Gateway (SGW), organization and transmission of paging messages, organization and transmission of broadcast messages, measurement for mobility or scheduling, and configuration of measurement reports. The base station 201 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, names of devices having a base station function may be different, for example, in an LTE network, the device is called an evolved NodeB (eNB) or eNodeB, in a3 rd generation mobile communication technology (3G) system, the device is called a base station (Node B), and in a next generation wireless communication system, the device is called a next generation base station (gNB). The name "base station" may change as communication technology evolves. Further, the base station 201 may be other apparatuses that provide the terminal device 202 with a wireless communication function, where possible. For convenience of description, in the embodiment of the present application, an apparatus for providing a wireless communication function for the terminal device 202 is referred to as a base station.

Terminal equipment 202 may also be referred to as a terminal (terminal), user Equipment (UE), mobile Station (MS), mobile Terminal (MT), etc. The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device. Terminal device 202 may also be a Relay (Relay) and a base station may both be terminal devices that may be in data communication. In the embodiment of the present application, as shown in fig. 2, a user equipment taking a terminal device 202 as a general meaning is illustrated as an example.

It should be noted that the communication system provided in the embodiments of the present application may refer to an unlicensed wireless communication system limited by spectrum regulations. Such as an NB-IoT-U system. The SIB transmission method according to the embodiment of the present application is applicable to spectrum regulations below 1 GHZ.

For example, FCC spectral regulations place the following constraints on devices using the 902MHZ-928MHZ band.

For digital modulation (digital modulation) equipment, the limitations that the 6dB channel bandwidth (bandwidth/reach channel) is not less than 500khz, the psd is not more than 8dBm/3kHz, the transmission power (or called conducted power) is not more than 30dBm, and the Equivalent Isotropic Radiated Power (EIRP) is not more than 36dBm are required. For a Frequency Hopping Spread Spectrum (FHSS) device, the channel bandwidth is not less than 25kHz, and it is required to satisfy that the 20dB channel bandwidth (bandwidth/reach channel) is not more than 500kHz. If the 20dB channel bandwidth is less than 250kHz, at least 50 frequency hopping channels are supported, the average occupied time (average time of occupancy) of each channel is not more than 0.4s/20s, namely within 20 seconds, the average occupied time of each channel is not more than 0.4s, and the EIRP is not more than 36dBm; if the channel bandwidth is between 250kHz and 500kHz, at least 25 frequency hopping channels are supported, and the average occupied time (average time of frequency) of each channel is not more than 0.4s/10 s. Specific references may be made to https: set forth for// www.ecfr.gov/cgi-bin/text-idxSID =9848c2d82501da1215bf12f957023a34 and mc = true & _ node = pt47.1.15& = rgn &' div5# se47.1.15 \\ u 1247.

Also, ETSI imposes the following constraints on devices using unlicensed bands below 1 GHz.

For the 869.4-869.65MHz (band 54) band, the equivalent Radiated Power (or Effective Radiated Power, ERP) is up to 27dBm within 1 hour, and the duty cycle is up to 10%. For the 865-868MHz frequency band, only 865.6-865.8MHz,866.2-866.4MHz,866.8-867.0MHz and 867.4-867.6MHz can be used, an adaptive power control technology is needed, the equivalent radiation power is up to 27dBm, the duty ratio of the network access point is up to 10% in 1 hour, otherwise, the duty ratio is 2.5%. Reference may be made in particular to the description of COMMISSION IMPLEMENTING DECISION (EU) 2017/1483 of 8 August 2017.

In addition, in the embodiments of the present application, words such as "exemplary" or "like" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts in a concrete fashion.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it can be known by a person of ordinary skill in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems with the evolution of the network architecture and the occurrence of a new service scenario.

In the present application, "connection" means that communication is possible, specifically, connection may be performed by a wired method or a wireless method, and this is not particularly limited in the embodiments of the present application. The devices connected to each other may be directly connected to each other, or may be connected to each other through other devices, which is not specifically limited in this embodiment of the present application.

According to the current MFA development, the transmission format of the SIB in NB-IoT-U systems is: taking the starting point of the fixed channel period as a boundary, after the SIB transmits a synchronizing signal and an MIB or the synchronizing signal, the MIB and other broadcast information, transmitting all SIBs in a fixed channel period according to the SIB repetition number in the SIB period, wherein all SIBs occupy continuous effective downlink subframes. The valid downlink subframe is a downlink subframe that can be used for transmitting the SIB. If the SIB period includes two fixed channel periods, the SIB is transmitted in a single fixed channel period, and no SIB is transmitted in the other fixed channel period. In this case, if the terminal device completes MIB reception in a fixed channel period in which no SIB is transmitted, it needs to wait for one fixed channel period to receive the SIB again. Therefore, the time delay of the terminal equipment for cell initial access is increased.

In order to reduce the time delay of the terminal equipment for cell initial access. The embodiment of the application provides an SIB transmission method, the basic principle of which is as follows: in a first period in a time domain, the SIB is repeatedly sent N times, where the first period includes m second periods, and as can be understood, the first period duration is m times of the second period duration, N is a positive integer greater than 0, and m is a positive integer greater than 0. When N is greater than or equal to m, the number of repetitions of the SIB in each of the 1 st to m-1 st second cycles is

The number of repetitions of the SIB in the mth of the m second periods is

For convenience of understanding, in the embodiments of the present application, it is assumed that the transmitting entity is a base station and the receiving entity is a terminal device. The description will be made taking as an example communication between a base station and a terminal device.

Fig. 3 is a flowchart of an SIB transmission method according to an embodiment of the present application, and as shown in fig. 3, the method may include:

s301, the base station repeatedly sends SIB for N times in the first period in the time domain.

The first period includes m second periods. The first period may be understood as a period in which the SIB is transmitted. The second period may be understood as a (main) fixed channel period. The (primary) fixed channel period may also be referred to as a MIB period, a PBCH period, or a (primary) Discovery Reference Signal (DRS) period. The primary fixed channel is understood to be a fixed frequency point for transmitting messages such as synchronization signals and MIB, or synchronization signals, MIB and other broadcast information. The primary fixed channel may also be referred to as a common channel. For a system operating on an unlicensed spectrum, in order to reduce a time delay when a terminal device initially accesses, a base station generally first sends a synchronization signal and an MIB, or a synchronization signal, an MIB, and other broadcast information, on a predetermined fixed frequency point, and after sending the synchronization signal and the MIB, or the synchronization signal, the MIB, and other broadcast information, sends an SIB to the terminal device in a time division multiplexing manner on a data channel. Therefore, the synchronization signal and the MIB, or the synchronization signal, the MIB and other broadcast information are transmitted on the fixed channel, so that the terminal device can search for the synchronization signal during blind detection, then receive the MIB information and other broadcast information, then receive the SIB, and perform the procedures of random access and the like. The SIB described in the embodiment of the present application includes SIB1 to SIB7, and the like. The synchronization signals include a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). The MIB is transmitted through a physical downlink broadcast channel (PBCH), and other broadcast information includes, but is not limited to, other SIBs that do not use the SIB transmission scheme according to the embodiment of the present application. For simplicity, hereinafter, the description of other broadcast information transmissions on the fixed channel is omitted, and only the transmission of the synchronization signal and the MIB on the fixed channel is described. The frequency domain resources and the time domain resources occupied by the fixed channel and the data channel in the embodiment of the application are both unlicensed spectrum resources.

It should be noted that, in addition to sending the synchronization signal and the MIB, or the synchronization signal, the MIB and other broadcast information, the fixed channel duration may also include an uplink portion, which is not limited in this embodiment.

Wherein m is a positive integer greater than 0, and N is a positive integer greater than 0. The first period comprising m second periods may be understood as a second period having a first period duration m times longer. In the embodiment of the present application, it is assumed that the first period duration is T1, the second period duration is T2, and T1= m × T2. The time unit of T1 and the time unit of T2 may be 1 millisecond (ms), or 10ms, respectively. In the examples of the present application, 1 millisecond is used as an example. It is achievable that, when N is greater than or equal to m, the number of repetitions of the SIB in each of the 1 st to m-1 st second cycles is

Wherein,

indicating rounding up. The term "rounding up" means that an integer which is larger than and closest to the result of calculation is taken when the result of calculation is not an integer. For example, N =7,m =2,n/m =3.5,

the number of SIB repetitions in the 1 st second cycle of the 2 second cycles is 4; the number of repetitions of the SIB in the 2 nd second cycle is 3. In the embodiment of the application, the sign of rounding up is omitted by default, that is, the calculation result of default N/m is an integer. For example, m is an integer power of 2, and m may be equal to 1, 2, 4, or 8.N is an integer power of 2, and N may be equal to 1, 2, 4, 8, or 16. The number of repetitions of the SIB in each of the m second periods may be N/m. The transmission of SIB in the second period is hereinafter illustrated by the example that the result of N/m is an integerAnd (6) introducing.

When N is greater than or equal to m, the SIBs are uniformly distributed in the m second periods N times, that is, the number of repetitions of the SIBs in each of the m second periods is N/m. For example, when N =2 and m =2, the first cycle includes 2 second cycles, and 1 SIB time is transmitted in each second cycle in the first cycle. When N =16 and m =2, the first cycle includes 2 second cycles, and the SIB is transmitted 8 times in each second cycle in the first cycle. When N =16 and m =4, the first cycle includes 4 second cycles, and the SIB is transmitted 4 times in each of the second cycles in the first cycle.

When N is less than m, from the first second cycle, the SIB in each of the first N second cycles is repeated 1 times, and the SIB in each of the second cycles in the last m-N second cycles is repeated 0 times. For example, when N =1 and m =2, the first cycle includes 2 second cycles, the SIB is transmitted once in the first second cycle in the first cycle, and the SIB is not transmitted in the second cycle in the first cycle. When N =2 and m =4, the first cycle includes 4 second cycles, the SIB is transmitted once in the first second cycle and the second cycle in the first cycle, respectively, and the SIB is not transmitted in the third second cycle and the fourth second cycle in the first cycle.

It should be noted that the SIB repeatedly transmitted N times in the embodiment of the present application includes the SIB transmitted 1 st time. It is understood that the SIB is repeatedly transmitted N times in the first period in the time domain, that is, the SIB is transmitted N times in total in the first period in the time domain, and the content of the SIB transmitted each time is the same.

The following describes in detail how to repeatedly transmit the SIB N/m times in each second period.

In a first implementation manner, N/m times of SIB transmission are equally spaced in each second period, and in combination with the above-mentioned N times of SIB transmission evenly distributed in m second periods, it can be understood that N times of SIB transmission are equally spaced in the first period. The SIB transmitted in each second period may be considered to occupy one time cell, and the SIB transmitted in each second period may occupy N/m time cells. Furthermore, the N/m time units in each second period may be uniformly distributed, i.e., the N/m time units are transmitted at equal intervals. In each time unit, the SIB transmitted each time occupies consecutive downlink subframes. For example, each transmitted SIB may occupy 8 consecutive downlink subframes. Alternatively, in each time unit, each transmitted SIB may occupy 4 consecutive downlink subframes.

The time cell may be understood as a time unit for transmitting the SIB once. The name of the time unit for transmitting the SIB once is not limited in the embodiment of the present application. For example, a time unit may also be referred to as a block of time units, a window of time units, a transmission block, or a transmission window. In addition, the duration of each time unit in the N/m time units may be determined according to the first period duration, the second period duration, and the number of repetitions of the SIB. The time duration of the time unit may also be different according to the difference between the first period duration, the second period duration and the number of repetitions of the SIB. In the embodiment of the present application, it is assumed that the time duration of the time unit of the SIB transmitted each time is T3. When N is greater than or equal to m, for the formula, the duration of the time unit may be: t3= T2 × m/N. The time unit of T3 may be 1ms or 10ms, respectively. When N is less than m, since the SIB is transmitted only once in the first N second periods in the first period, the duration of the time unit may be: t3= T1/m. In the present embodiment, 1 millisecond is used as an example for explanation.

For example, let T1=2560ms, T2=1280ms, m = T1/T2=2, i.e. the first cycle includes 2 second cycles. As shown in fig. 4, the number of repetitions of the SIB is schematically illustrated as 16, 8, 4, 2, and 1, respectively.

When N =16, 8 SIBs are transmitted in each second period, and the SIBs transmitted in 8 times are uniformly distributed in the second period, that is, each second period includes 8 time units, and the 8 time units are uniformly distributed in each second period. The duration of the time unit is: t3=1280 × 2/16=160ms.

When N =8, 4 SIBs are transmitted in each second period, and the SIBs transmitted in 4 times are uniformly distributed in the second period, that is, each second period includes 4 time units, and the 4 time units are uniformly distributed in each second period. The duration of the time unit is: t3=1280 × 2/8=320ms.

When N =4, 2 SIBs are respectively transmitted in each second period, and the 2 transmitted SIBs are uniformly distributed in the second period, that is, each second period includes 2 time units, and the 2 time units are uniformly distributed in each second period. The duration of the time unit is: t3=1280 × 2/4=640ms.

When N =2, 1 SIB time is transmitted in each second period, that is, 1 time unit is included in each second period. The duration of the time unit is: t3=1280 × 2/2=1280ms.

When N =1, N is smaller than m, the SIB is transmitted 1 time in a first second period within the first period, and the SIB is not transmitted in a second period within the first period. The duration of the time unit is: t3=2560/2=1280ms.

It should be noted that the time duration of the time unit is only an illustrative example, and the specific time duration of the time unit may not be limited in the embodiment of the present application. Of course, the duration of the time unit described in the embodiment of the present application may also be defined in the NB-IoT system in a multiplexing manner. For example, if the duration of the time unit is defined as 160ms in the NB-IoT system, the duration of the time unit can be considered as 160ms regardless of the number of times of SIB repetition in the embodiment of the present application. Or, the duration of the time unit may be determined according to the number of data channels occupied by the SIB when the SIB is transmitted and the channel duration of each data channel. For example, if the channel duration of one data channel is 20ms, and the SIB transmission occupies 4 data channels, the duration of a time cell is 80ms. If the SIB transmission occupies 2 data channels, the time duration of the time cell is 40ms. It can be understood that the time duration of the time unit described in the embodiment of the present application includes the transmission time duration of the transmission of the SIB.

Further, since the synchronization signal and the MIB need to be transmitted on the primary fixed channel in each second period, the initial transmission time of the SIB in the time unit that is first transmitted in the second period needs to be shifted by the duration of the primary fixed channel. Furthermore, since the terminal device in the NB-IoT-U system is a low-cost terminal and has limited processing capability, the terminal device needs time to process the MIB (or the sync signal, or the sync signal and other broadcast information) after receiving the MIB (or the sync signal, or the sync signal and other broadcast information), and cannot immediately receive the SIB, so that, in order to ensure complete reception of each SIB in the second period, and reduce the time delay for the terminal device to receive the SIB, if the main fixed channel does not include an uplink portion, the start time of first sending the SIB in the first time unit in the second period needs to be offset by a certain time period with respect to the end time of the main fixed channel, that is, a time offset is needed for the first SIB subframe in the first time unit in the second period with respect to the end subframe position of the MIB, thereby ensuring that the terminal device can receive the SIB in time. For example, the start time of the first transmission of the SIB in the first time unit within the second period is a time shifted by T4 and T5 from the start time of the second period to which the SIB for the first transmission belongs. T4 denotes a primary fixed channel duration, and T5 denotes a time offset with respect to an end subframe position of MIB transmission (or primary fixed channel). The time unit of T4 and T5 is 1ms or 10ms, which is the same as the unit of the time unit, T4 is an integer of 1 or more, and T5 is an integer of 0 or more.

The above description is illustrative. Fig. 5 is a schematic structural diagram of another SIB transmission structure according to an embodiment of the present application. As shown in fig. 5, it is assumed that the second cycle duration is 1280ms and the time unit duration is 160ms. One time unit includes 8 channels. The duration of 8 channels is 20ms. Each channel comprises 20 subframes, one subframe being 1ms in duration. The first channel acts as the primary fixed channel for transmitting the synchronization signals and the MIB, i.e. the primary fixed channel has a duration of 20ms. The remaining 7 channels are used as data channels for transmitting uplink data and downlink data, and the duration of each data channel is 20ms. The first 2 subframes in a data channel are used to transmit downlink data, and the last 18 subframes are used to transmit uplink data, that is, the uplink and downlink ratio of the data channel is 2 Downlink (DL) subframes and 18 Uplink (UL) subframes. The subframe position of the first transmission SIB in the current time unit is offset by the primary fixed channel duration and one data channel duration, i.e., 40ms, from the start time of the current time unit. Under the condition that SIB transmission in the current time unit needs to occupy 8 continuous downlink subframes, one data channel includes 2 downlink subframes, SIB transmission in the current time unit occupies 4 downlink subframes of the data channel, and the time length for SIB transmission in the current time unit is 80ms. The other data channels include downlink subframes for transmitting downlink data, i.e., a second data channel, a seventh data channel, and an eighth data channel. At this time, the traffic delay due to SIB transmission is at least 80ms.

It should be noted that, according to the difference of the uplink and downlink subframe ratios in the data channel, the number of the data channels occupied by sending the SIB in the current time unit is also different. For example, as shown in fig. 6, it is assumed that the first 8 subframes of a data channel are used for transmitting downlink data, and the last 12 subframes are used for transmitting uplink data, that is, the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplink subframes. Under the condition that the SIB in the current time cell needs to occupy 8 continuous downlink subframes, one data channel comprises eight downlink subframes, the SIB is sent in the current time cell to occupy the downlink subframes of the one data channel, and the time for sending the SIB in the current time cell is 20ms. The other data channels include downlink subframes for transmitting downlink data, i.e. the second data channel, and the fourth to eighth data channels. At this time, the traffic delay due to SIB transmission is at least 20ms.

In addition, in the data transmission process, generally, more uplink data is than downlink data, and the number of uplink subframes is greater than the number of downlink subframes in the uplink and downlink proportion of the data channel. The number of downlink subframes in a data channel described in this embodiment may be an integer such as 1, 2, 3, 4, 5, 6, 7, 8, or 9. When the number of the downlink subframes needing to occupy continuous SIB transmission in the current time unit is a multiple of the number of the downlink subframes in one data channel, the number of the data channels needing to occupy SIB transmission in the current time unit is obtained by dividing the number of the downlink subframes needing to occupy continuous SIB transmission in the current time unit by the number of the downlink subframes in one data channelThe quotient of the number of subframes, i.e., C = a/B, a represents the number of consecutive downlink subframes that need to be occupied for sending SIB in the current time unit, B represents the number of downlink subframes in one data channel, and C represents the number of data channels that need to be occupied for sending SIB in the current time unit. For example, when a =8,b =4, C =2. When the number of the continuous downlink subframes occupied by the SIB in the current time cell is not a multiple of the number of the downlink subframes in one data channel,

indicating rounding up. The term "rounding up" means that an integer which is larger than and closest to the result of calculation is taken when the result of calculation is not an integer. For example, when a =8, b =3,

in the three data channels occupied by the transmission of the SIB, all downlink subframes in the first data channel and the second data channel are used for transmitting the SIB, the first two downlink subframes in the third data channel are used for transmitting the SIB, and the last downlink subframe can be used for transmitting downlink data. When a =8, b =5,

in the two data channels occupied by the SIB transmission, all downlink subframes in the first data channel are used for SIB transmission, the first three downlink subframes in the second data channel are used for SIB transmission, and the last two downlink subframes can be used for downlink data transmission. When a =8, b =6,

in the two data channels occupied by the transmission of the SIB, all downlink subframes in the first data channel are used for transmitting the SIB, the first two downlink subframes in the second data channel are used for transmitting the SIB, and the last four downlink subframes can be used for transmitting downlink data. When a =8, b =7,

in the two data channels occupied by the SIB, all downlink subframes in the first data channel are used for transmitting the SIB, the previous downlink subframe in the second data channel is used for transmitting the SIB, and the last six downlink subframes may be used for transmitting downlink data. When a =8, b =9,

the SIB is transmitted in the first eight downlink subframes in one data channel occupied by the SIB, and the last downlink subframe may be used to transmit downlink data. Repeating the transmission of SIB occupation N times in the first period

A data channel.

Further, for the consideration of unified design, it can be uniformly specified that the starting time of SIB transmission in each time cell is the time offset from the starting time of the time cell by T4 and T5, i.e. the first downlink subframe of SIB transmission in each time cell is offset by T4 and T5 with respect to the first downlink subframe of the current SIB time cell. The sum of T4 and T5 may be considered as a preset offset value. The preset offset value may be preconfigured to be related to the frame structure. For example, the preset offset value includes a main fixed channel duration and one data channel duration, e.g., T4=20 ms, T5=20 ms, and the preset offset value is 40ms. The preset offset value may also be preconfigured by the base station device, e.g., the preset offset value is 40 milliseconds. The preset offset value may also be indicated by broadcast information, such as MIB, and is set to 40ms. The preset offset value can also be indicated by a synchronization sequence, wherein the synchronization sequence comprises a PSS and a SSS, and it can be understood that 10ms is assumed to be a radio frame, and the radio frame number n is one radio frame _f The value range is 0-1023, 10 sub-frames are contained in one radio frame, each sub-frame contains 2 time slots, the number of the time slot n _s The value range in a wireless frame is 0-19, and the initial position of each SIB transmission is relative to the initial position of the time unit to which the SIB transmission belongsLet the offset value be

The length of the first period is equal to 2560ms, and the starting position of SIB transmission in each time cell for transmitting SIB satisfies:

wherein

For rounding down, rounding down refers to taking an integer that is smaller than and closest to the result of the calculation when the result of the calculation is not an integer.

Optionally, since the duration of the primary fixed channel is determined, the preset offset value may also be considered as a duration that does not include the duration of the primary fixed channel. For example, the start time of the first transmission of the SIB in each second period is a time shifted by the main fixed channel duration and the preset offset value from the start time of the second period to which the first transmission of the SIB belongs. The starting time of sending the SIB in each time cell is the time of shifting the main fixed channel duration and the preset offset value from the starting time of the time cell. In this case, the preset offset value may be a time length preconfigured by the base station device, or a data channel time length, for example, the preset offset value is 20ms.

It should be noted that, assuming that the first period duration is 2560ms and the SIB repetition number N is equal to 16, for the frame structure shown in fig. 5, the synchronization signal and MIB transmitted by the main fixed channel occupy 20ms, SIB needs to be transmitted 8 times in the second period, each SIB transmission occupies 8ms, and the downlink overhead occupied by the synchronization signal and MIB transmitted by the main fixed channel and the SIB transmitted by the data channel is about downlink overhead

On the unlicensed spectrum, if the downlink duty cycle requirement is 10%, the resource for transmitting downlink data only occupies 3.4%, so that the overhead of the SIB can be reduced by increasing the first period. For example, when the first period is 5120ms, the primary fixed channel is transmittedThe downlink overhead occupied by the synchronization signal and the SIB and data channel transmissions is about

When the first period duration is 10240ms, the downlink overhead occupied by the synchronization signal and the MIB transmitted by the primary fixed channel and the SIB transmitted by the data channel is about

The first period duration may be preconfigured according to the actual situation. For example, in areas without duty cycle requirements, the first cycle duration is preconfigured to 2560ms. In areas with duty cycle requirements, the first period duration is preconfigured to be 5120ms or 10240ms. The first period duration can also be configured by the MIB to support more flexibility, it being understood that assuming 10ms as a radio frame, the number of the radio frame n _f The value range is 0-1023, 10 sub-frames are contained in one radio frame, each sub-frame contains 2 time slots, and the number n of the time slots _s The value range in a wireless frame is 0-19, and the preset deviant of the initial position of each SIB transmission relative to the initial position of the time unit to which the SIB transmission belongs is

If the first period duration is equal to 5120ms, the starting position of SIB transmission in each time cell for SIB transmission satisfies:

or, if the first period duration is equal to 10240ms and N is greater than 1, the starting position of SIB transmission in each SIB transmission time cell is satisfied

Wherein

To get rounded down, theThe predicate rounding down refers to taking the integer that is smaller and closest to the result of the computation when the result of the computation is not an integer.

Similarly, in addition to increasing the duration of the first period, the overhead of the SIB may also be reduced by reducing the maximum number of retransmissions of the SIB. For example, the duration of the first period is 2560ms, the maximum number of times of repeating the SIB in the first period N is equal to 8, and at this time, the downlink overhead occupied by the synchronization signal and the MIB transmitted by the primary fixed channel and the SIB transmitted by the data channel is about 4.1%. The number of repetitions of the SIB in the first period may be indicated by the MIB. In areas without duty cycle requirements, the SIB repetition times are 4, 8 and 16. In areas with duty cycle requirements, the SIB repetition times are 2, 4 and 8.

Compared with the prior art, the SIB repeatedly sent in the first period is uniformly distributed between the second periods, for the short-distance coverage terminal, the SIB does not need to be received after waiting for one or more second periods, and the initial access delay is reduced; and after the preset offset value is offset from the starting time of the second period, the terminal device receives the SIB again, so that the terminal device can be ensured to completely receive the first transmission of the SIB in the second period.

In addition, in the prior art, if downlink data reception of the terminal device (or downlink data transmission of the base station) coincides with the SIB transmission time period, the terminal device (or the base station) needs to delay the SIB transmission time period and then continue downlink reception (or downlink transmission), since the SIBs are all transmitted in a fixed channel period, most of downlink resources in the fixed channel period may be occupied by the SIB, and the downlink resources occupied by the SIB cannot perform data transmission, thereby increasing service delay. Taking SIB repeated transmission 16 times, each transmission occupies 8 downlink subframes, for example, then at least 128 consecutive downlink subframes are occupied by the SIB. Since NB-IoT-U is a TDD system, when the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplink subframes, the traffic will be interrupted (128/8) =20 =320ms. In the SIB transmission method according to the embodiment of the present application, the SIB is sent in units of time units in the second period, and the SIB occupies only a part of downlink subframes in one time unit, so that the service delay of the terminal device can also be reduced.

It should be noted that, in addition to the primary fixed channel, a secondary fixed (secondary anchor) channel may be periodically configured on the data channel in the second period. For example, in the prior art, the SIBs are all transmitted in a centralized manner in a second period, and when the number of SIB repetitions is 16, the SIB needs to occupy 128 (16 × 8) ms consecutive, that is, 128 downlink subframes. Taking the uplink and downlink ratio of the data channel as 8 downlink subframes and 12 uplink subframes as an example, the duration of one data channel is 20ms, 16 data channels need to be occupied to send the SIB, and the SIB needs to last for 320 (16 × 20) ms. If the second period includes 7 secondary fixed channels plus one primary fixed channel and the second period includes 8 fixed channels, the fixed channel period is 160ms, and 2 secondary fixed channels need to be skipped when the sib lasts for 320ms, so the actual service delay is 360ms. Fig. 7 is a schematic diagram illustrating a structure of sending an SIB through a secondary fixed channel according to the prior art. In this case, the downlink subframes that can be used to transmit the SIB do not include at least the downlink subframe occupied by the primary fixed channel and the downlink subframe occupied by the secondary fixed channel. The downlink subframes occupied by the SIB described in the embodiment of the present application all refer to valid downlink subframes, that is, downlink subframes that can be used for transmitting the SIB. The remaining downlink subframes except for the primary fixed channel and the downlink subframe for transmitting the SIB among all the downlink subframes may be used to transmit downlink data.

In addition, since the secondary fixed channel period or the number of secondary fixed channels in the primary fixed channel period may be configured in the SIB, the terminal device does not know the secondary fixed channel period when receiving the SIB. The embodiment of the present application provides an achievable method, when a base station transmits an SIB, resource reservation is performed according to a minimum period mode that a fixed channel can support, the SIB is only transmitted on a resource that is not reserved and occupied by the fixed channel, and a terminal device also performs SIB reception according to the minimum period reservation mode of the fixed channel. For example, if the number of secondary fixed channels that the base station supports to transmit in one second period is 1, 3, or 7 (corresponding to the number of fixed channels in one second period is 2, 4, or 8), the terminal device assumes that the number of secondary fixed channels in one second period is 7 when receiving the SIB, that is, the fixed channel period is 160ms, and as long as the downlink subframe corresponding to the fixed channel resource is a non-valid downlink subframe for the SIB, the downlink subframe corresponds to the fixed channel resource.

Fig. 8 is a schematic structural diagram of sending an SIB through a secondary fixed channel according to an embodiment of the present disclosure. Let T1=2560ms, T2=1280ms, m = T1/T2=2, i.e. the first cycle includes 2 second cycles. A second period contains 1 primary fixed channel and 7 secondary fixed channels, i.e. a second period contains 8 fixed channels.

When N =16, the duration of the time unit is 160ms. The adjacent fixed channel period is 160ms, and includes the periods of the main fixed channel and the auxiliary fixed channel, and the periods of the auxiliary fixed channel and the auxiliary fixed channel. It can be seen that the secondary fixed channel, like the primary fixed channel, occupies the first channel of each SIB time cell, i.e., the first 20ms of each SIB time cell. Since the SIB can be transmitted after being offset by 40ms from the start time of the time cell in which the SIB is located, the SIB and the secondary fixed channel do not collide.

Similarly, when N =8, N =4, N =2, or N =1, the retransmission SIB may be transmitted after being offset by 40ms from the start time of the time cell in which the SIB is located, so that the SIB and the secondary fixed channel do not collide.

Similarly, if 3 secondary fixed channels are included in one second period, the period of the adjacent fixed channels is 320ms. At this point, only part of the secondary fixed channels intersect the time cell of the SIB. In the time cells where the secondary fixed channel intersects the time cells of the SIBs, the secondary fixed channel is identical to the primary fixed channel, each fixed channel occupying the first channel of each SIB time cell, i.e. the first 20ms of each SIB time cell. Similarly, the retransmission SIB may be transmitted after an offset of 40ms from the start time of the time cell in which the SIB is located, so that the SIB and the secondary fixed channel do not collide with each other.

The starting time for sending the SIB in each time cell is the time shifted by the preset offset value from the starting time of the time cell, so that the position of the auxiliary fixed channel is effectively avoided, the service delay caused by SIB sending is further reduced, and the conflict between SIB and auxiliary fixed channel in sending time is avoided.

In a second implementation manner, if the SIB transmitted each time in each second period is considered to occupy one time cell, the SIBs transmitted N/m times in each second period may occupy N/m time cells. Furthermore, the N/m time units may be continuously distributed (concentrated distributed) in each second period, i.e., the N/m time units are continuously transmitted. In each time unit, the SIB transmitted each time occupies consecutive downlink subframes. For example, each transmitted SIB may occupy 8 consecutive downlink subframes. Alternatively, in each time unit, each transmitted SIB may occupy 4 consecutive downlink subframes. In this case, the duration of the time unit described in the embodiment of the present application may also be defined in the NB-IoT system in a multiplexing manner. For example, if the duration of the time unit is defined as 160ms in the NB-IoT system, the duration of the time unit can be considered as 160ms regardless of the number of times of SIB repetition in the embodiment of the present application. Or, the duration of the time unit may be determined according to the number of data channels occupied by the SIB when the SIB is transmitted and the channel duration of each data channel. For example, if the channel duration of one channel is 20ms, and the SIB transmission occupies 4 data channels, the duration of the time unit is 80ms. If the SIB transmission occupies 2 data channels, the duration of the time unit is 40 milliseconds. It can be understood that the time duration of the time unit described in the embodiment of the present application includes the transmission time duration of the transmission of the SIB.

For example, let T1=2560ms, T2=1280ms, m = T1/T2=2. As shown in fig. 9, the number of repetitions of the SIB is schematically illustrated as 16, 8, 4, 2, and 1, respectively.

When N =16, 8 SIBs are transmitted in each second period, 8 SIBs transmitted in each second period occupy 8 time units, each transmitted SIB occupies one time unit, and 8 time units are continuously transmitted (continuously distributed) in each second period.

When N =8, the SIB is transmitted 4 times in each second period, the SIB transmitted 4 times in each second period occupies 4 time units, the SIB transmitted each time occupies one time unit, and the 4 time units are continuously transmitted (continuously distributed) in each second period.

When N =4, the SIB is transmitted 2 times in each second period, the SIB transmitted 2 times in each second period occupies 2 time units, the SIB transmitted each time occupies one time unit, and the 2 time units are continuously transmitted (continuously distributed) in each second period.

When N =2, 1 time of SIB is transmitted in each second period, and the 1 time of SIB transmitted in each second period occupies 1 time element.

When N =1, the SIB is transmitted 1 time in a first period within the first period, and the SIB is not transmitted in a second period within the first period.

In addition, the start time of the first transmission of the SIB in each second period is a time offset by a preset offset value from the start time of the second period to which the first transmission of the SIB belongs. Specifically, if N/m time units are continuously transmitted in each second period, the duration of the time units is 160ms, and the starting time of transmitting the SIB in each time unit is the time offset from the starting time of the time unit by the preset offset value. For other detailed descriptions of the preset offset value, reference may be made to the description in the first implementation manner, and details of the embodiment of the present application are not repeated herein. For other detailed descriptions about the downlink overhead and the secondary fixed channel, the description in the first implementation manner may also be referred to, and details of the embodiment of the present application are not described herein again.

Compared with the prior art, the SIB repeatedly sent in the first period is uniformly distributed between the second periods, and for the short-distance coverage terminal, the SIB does not need to be received after waiting for one second period, thereby reducing the initial access delay; and after the preset offset value is offset from the starting time of the second period, the terminal device receives the SIB again, so that the terminal device can be ensured to completely receive the first transmission of the SIB in the second period. However, compared to the first implementation, since the repeated transmission of the SIB is distributed in the second period, for a remote terminal device performing downlink data transmission, the downlink data transmission may be interrupted by the transmission of the SIB for multiple times, so that the service delay is greater than that in the first implementation, but smaller than that in the prior art.

In a third implementation manner, the SIBs are continuously transmitted N/m times in each second period, and in this case, there is no concept of the time unit described in the first implementation manner and the second implementation manner. The SIB transmitted each time may occupy consecutive downlink subframes. If the SIB transmitted each time can occupy 8 consecutive downlink subframes, the SIB transmitted N/m times occupies N × 8/m consecutive downlink subframes. If the SIB transmitted each time can occupy 4 consecutive downlink subframes, the SIB transmitted N/m times occupies N × 4/m consecutive downlink subframes.

For example, let T1=2560ms, T2=1280ms, m = T1/T2=2. As shown in fig. 10. When N =16, 8 SIBs are transmitted in each second period, 8 SIBs are continuously transmitted (continuously distributed) in each second period, and the 8 transmitted SIBs occupy 16 × 8/2=64 downlink subframes in succession. Taking an example that the duration of one data channel is 20ms, the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplink subframes, the duration of the SIB is 160ms, that is, the increased service delay is 160ms.

As shown in fig. 11, when N =8, the SIB is transmitted 4 times in each second period, and the SIBs transmitted 4 times in each second period are continuously transmitted (continuously distributed), and the SIBs transmitted 4 times occupy 8*8/2=32 downlink subframes that are continuous. Taking an example that the duration of one data channel is 20ms, the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplink subframes, the duration of the SIB is 80ms, that is, the increased service delay is 80ms.

As shown in fig. 12, when N =4, 2 SIBs are transmitted in each second period, and 2 SIBs are continuously transmitted (continuously distributed) in each second period, and the SIBs transmitted 2 times occupy 4*8/2=16 downlink subframes that are continuous. Taking an example that the duration of one data channel is 20ms, the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplink subframes, the duration of the SIB is 40ms, that is, the increased service delay is 40ms.

As shown in fig. 13, when N =2, 1 SIB is transmitted in each second period, and 1 SIB is continuously transmitted (continuously distributed) in each second period, and the SIBs transmitted 1 time occupy 2*8/2=8 downlink subframes that are continuous. Taking an example that the duration of one data channel is 20ms, the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplink subframes, the duration of the SIB is 20ms, that is, the increased service delay is 20ms.

For N =1, N is less than m, the SIB is transmitted 1 time in a first second period within the first period, and the SIB is not transmitted in a second period within the first period. In the first second period in the first period, 1 SIB is continuously transmitted (continuously distributed), and the SIB transmitted 1 time occupies 1 × 8=8 downlink subframes in succession.

The starting time of the first transmission of the SIB in each second period is a time shifted by a preset offset value from the starting time of the second period to which the first transmission of the SIB belongs. For other detailed descriptions of the preset offset value, reference may be made to the description in the first implementation manner, and details are not described herein in this embodiment of the application. For other detailed descriptions about the downlink overhead and the secondary fixed channel, reference may also be made to the description in the first implementation manner, and details of the embodiments of the present application are not described herein again.

The above description is exemplified below. Fig. 14 is a schematic structural diagram of another SIB transmission according to an embodiment of the present application. As shown in fig. 14, it is assumed that the second period duration is 1280ms, the second period includes 64 channels, and the duration of each of the 64 channels is 20ms. Each channel comprises 20 subframes, one subframe being 1ms in duration. The first channel acts as the primary fixed channel for transmitting the synchronization signals and the MIB, i.e. the primary fixed channel has a duration of 20ms. The remaining channels serve as data channels for transmitting uplink data and downlink data. The first 2 subframes in a data channel are used for transmitting downlink data, and the last 18 subframes are used for transmitting uplink data, that is, the uplink and downlink ratio of the data channel is 2 downlink subframes and 18 uplink subframes. The subframe location of the first transmitted SIB in the current second period is offset by the main fixed channel duration and one data channel duration, i.e., 40ms, from the start time of the current second period. The SIB is repeatedly sent 8 times in the current second period, and the SIB sent each time occupies 8 consecutive downlink subframes, so the SIB needs to occupy 64 consecutive downlink subframes in the current second period. If one data channel includes 2 downlink subframes, the SIB is sent in the current second period to occupy 32 downlink subframes of the data channel, and the duration of sending the SIB in the current second period is 640ms. The downlink subframes included in the other data channels are used for transmitting downlink data. At this time, the service delay due to SIB transmission is at least 640ms.

It should be noted that, according to the different uplink and downlink subframe ratios in the data channel, the number of the data channels occupied by sending the SIB in the current second period is also different. For example, as shown in fig. 15, it is assumed that the first 8 subframes of a data channel are used for transmitting downlink data, and the last 12 subframes are used for transmitting uplink data, that is, the uplink and downlink ratio of the data channel is 8 downlink subframes and 12 uplink subframes. Under the condition that the SIB needs to occupy 64 consecutive downlink subframes in the current second period, one data channel includes 8 downlink subframes, the SIB is sent in the current second period to occupy the downlink subframes of 8 data channels, and the time duration for sending the SIB in the current second period is 160ms. The other data channels include downlink subframes for transmitting downlink data. At this time, the traffic delay due to SIB transmission is at least 160ms.

Compared with the prior art, the SIB repeatedly sent in the first period is uniformly distributed in the second period and is distributed in the second period in a centralized manner, for the short-distance coverage terminal, the SIB does not need to be received after waiting for the second period, and the initial access delay is reduced; and after the preset offset value is offset from the starting time of the second period, the terminal device receives the SIB again, so that the terminal device can be ensured to completely receive the first transmission of the SIB in the second period. However, compared to the first implementation, since the repeated transmission of the SIB is distributed in the second period, for a remote terminal device performing downlink data transmission, the downlink data transmission may be interrupted by the transmission of the SIB for multiple times, so that the service delay is greater than that in the first implementation, but smaller than that in the prior art.

In a fourth implementation manner, if the SIB transmitted in each second period is considered to occupy one time unit, the SIB transmitted in N/m times in each second period may occupy N/m time units. And when N is larger than or equal to m, the time duration of the time unit is T2 m/N. When N is less than m, the duration of a time cell may be T1/m. The difference from the first implementation manner is that in each time unit, the SIBs may be uniformly distributed, that is, p downlink subframes occupied by each SIB transmission are uniformly distributed in each affiliated time unit, and p is a positive integer greater than 0. For example, SIB for each transmission may occupy 8 downlink subframes, and the 8 downlink subframes occupied by SIB transmission in the time unit occupied by SIB transmission at this time are uniformly distributed in each time unit. Or, in each time unit, the SIB transmitted each time may occupy 4 downlink subframes, and the 4 downlink subframes occupied by SIB transmission in the time unit occupied by SIB transmission at this time are uniformly distributed in each time unit. In addition, as can be seen from the above description of the embodiments, in practical applications, in order to ensure that each SIB can be completely received in the second period, the start time of first sending the SIB in each time cell in the second period needs to be shifted from the start time of the current time cell by a certain time period according to a preset offset value with respect to the start time of the current time cell, and then the SIB is sent. Therefore, the subframes used for sending the SIB in the time unit may be equally distributed in the remaining duration after the starting time of the current time unit is shifted by the preset offset value.

For example, let T1=2560ms, T2=1280ms, m = T1/T2=2, i.e. the first cycle includes 2 second cycles.

As shown in fig. 16, when N =16, 8 SIBs are respectively transmitted in each second period, and the 8 transmitted SIBs are uniformly distributed in the second period, that is, each second period includes 8 time units, and the 8 time units are uniformly distributed in each second period. The duration of the time unit is: t3= T2 × m/N =1280 × 2/16=160ms. In addition, assuming that the main fixed channel duration and the data channel duration are both 20ms, the preset offset value is 40ms, i.e. offset by one main fixed channel duration and one data channel duration, and p =6. And for the first effective downlink subframe after the initial subframe occupied by sending the SIB each time is shifted by a preset offset value from the initial time of the time cell to which the SIB belongs, at least 1 downlink subframe is contained in each time duration ((T2 x m/N) -T6)/p in each time cell for sending the SIB. Where T6 denotes a preset offset value. Within ((T2 × m/N) -T6)/p = ((1280 × 2/16) -40)/6 =20ms per time unit, 1 downlink subframe is included for transmission of the SIB. At this time, when the 6 downlink subframes occupied by SIB transmission are uniformly distributed in each belonging time unit, the number of channels that can be used for SIB transmission in one time unit is equal to the number of downlink subframes that need to be occupied for SIB transmission once.

As shown in fig. 17, when N =8, 4 SIBs are respectively transmitted in each second period, and the 4 transmitted SIBs are uniformly distributed in the second period, that is, each second period includes 4 time units, and the 4 time units are uniformly distributed in each second period. The duration of the time unit is: t3=1280 × 2/8=320ms. In addition, assuming that the primary fixed channel duration and the data channel duration are both 40ms, the preset offset value is 80ms, that is, one primary fixed channel duration and one data channel duration are offset, p =6, and 1 downlink subframe is included in each time unit ((T2 × m/N) -T6)/p = ((1280 × 2/8) -80)/6 =40ms for transmitting the SIB. At this time, when the 6 downlink subframes occupied by SIB transmission are uniformly distributed in each belonging time unit, the number of channels that can be used for SIB transmission in one time unit is equal to the number of downlink subframes that need to be occupied for SIB transmission once.

As shown in fig. 18, when N =4, 2 SIBs are respectively transmitted in each second period, and the 2 transmitted SIBs are uniformly distributed in the second period, that is, each second period includes 2 time units, and the 2 time units are uniformly distributed in each second period. The duration of the time unit is: t3=1280 × 2/4=640ms. In addition, assuming that the main fixed channel duration and the data channel duration are both 20ms, the preset offset value is 40ms, i.e. offset by one main fixed channel duration and one data channel duration, and p =8. Since the remaining duration in the time unit after the offset is 600ms, and the 8 downlink subframes occupied by SIB transmission cannot be uniformly distributed within 600ms, at this time, in order to uniformly distribute the 8 downlink subframes occupied by SIB transmission within the remaining 600ms in the time unit to which the SIB transmission belongs, the 8 downlink subframes occupied by SIB transmission may be uniformly distributed within the first 400ms of the remaining 600ms in the time unit after the offset. For example, 2 downlink subframes are transmitted every 100ms in the first 400ms of the remaining 600ms in the post-offset time unit, and the 2 downlink subframes may be downlink subframes in the same channel. 100ms includes 5 channels.

As shown in fig. 19, when N =2, the SIB is transmitted 1 time in each second period, that is, each second period includes 1 time element. The duration of the time unit is: t3=1280 × 2/2=1280ms. In addition, assuming that the main fixed channel duration and the data channel duration are both 40ms, the preset offset value is 80ms, i.e. offset by one main fixed channel duration and one data channel duration, and p =4. Since the remaining duration in the time unit after the offset is 1200ms, and 4 downlink subframes occupied by SIB transmission cannot be uniformly distributed within 1200ms, at this time, in order to uniformly distribute the 4 downlink subframes occupied by SIB transmission within the remaining 1200ms in the time unit to which the SIB transmission belongs, the 4 downlink subframes occupied by SIB transmission may be uniformly distributed within the first 1120ms (28 channels) of the remaining 1200ms in the time unit after the offset. For example, 1 downlink subframe is transmitted every 280ms for the first 1120ms of the remaining 1200ms in the post-offset time unit. 280ms includes 7 channels. The first downlink subframe in the first of each 7 channels is used to transmit the SIB.

When N =1, N is less than m, the SIB is transmitted 1 time in a first second period within the first period, and the SIB is not transmitted in a second period within the first period. The duration of the time unit is: t3=2560/2=1280ms. The description in the time unit may refer to the description of N =2.

The above description is exemplified below. Fig. 20 is a schematic structural diagram of another SIB transmission according to an embodiment of the present application. As shown in fig. 20, it is assumed that the second cycle duration is 1280ms and the time unit duration is 160ms. One time unit includes 8 channels. The duration of 8 channels is 20ms. Each channel comprises 20 subframes, one subframe being 1ms in duration. The first channel acts as the primary fixed channel for transmitting the synchronization signals and the MIB, i.e. the primary fixed channel has a duration of 20ms. The remaining 7 channels are used as data channels for transmitting uplink data and downlink data, and the duration of each data channel is 20ms. The first 2 subframes in a data channel are used for transmitting downlink data, and the last 18 subframes are used for transmitting uplink data, that is, the uplink and downlink ratio of the data channel is 2 downlink subframes and 18 uplink subframes. The subframe position of the first transmission SIB in the current time unit is offset by the primary fixed channel duration and one data channel duration, i.e., 40ms, from the start time of the current time unit. Under the condition that 8 downlink subframes need to be occupied by sending the SIB in the current time unit, one data channel comprises 2 downlink subframes, the first downlink subframe of each data channel in the last 6 data channels in the current time unit is used for sending the SIB, the second downlink subframe of any 2 data channels in the last 6 data channels is selected for sending the remaining 2 SIBs, and at least 1 downlink subframe is included in each 20ms after the preset offset value is offset in each time unit and used for sending the SIB. At this time, the service delay due to the transmission of the SIB is at least 40ms.

It should be noted that the SIB transmission methods described in the above embodiments may be used in combination. For example, if the SIB transmitted each time in each second period is considered to occupy one time cell, the SIBs transmitted N/m times in each second period may occupy N/m time cells. The N/m time units may be uniformly distributed or continuously distributed (centralized distribution) in each second period, that is, the N/m time units are continuously transmitted, and the SIBs may be continuously distributed or uniformly distributed in each time unit.

S302, the terminal equipment receives the SIB for N times in the first period in the time domain.

The method for the terminal device to receive the SIB for N times in the first period in the time domain may refer to the description about the SIB repeated transmission method for N times in S301, and this embodiment is not described herein again.

In addition, before repeatedly transmitting the SIB N times in the first cycle in the time domain, the base station needs to transmit a synchronization signal and MIB to the terminal device. As shown in fig. 21, the embodiment of the present application may further include the following steps.

S303, the base station sends the synchronizing signal and the master information block to the terminal equipment by adopting a fixed channel.

S304, the terminal equipment receives the synchronous signal and the master information block on the fixed channel.

After receiving the synchronization signal, the master information block, and the SIB, the terminal device synchronizes with the base station and performs random access, so that the terminal device can communicate with the base station.

It should be noted that, in the embodiment of the present application, names of the fixed channel, the primary fixed channel, the secondary fixed channel, and the data channel are not limited. Fig. 22, 23, and 24 are schematic diagrams of three frame structures of an NB-IoT-U according to an embodiment of the present disclosure. The primary fixed channel shown in fig. 22, 23, and 24 may also be referred to as a primary fixed channel segment (primary anchor channel segment) or a primary fixed segment (primary anchor segment) or a fixed segment (anchor segment). The secondary fixed channel may also be referred to as a secondary fixed channel segment (secondary anchor channel segment) or a secondary fixed segment (secondary anchor segment). A data channel may also be referred to as a data channel segment (data segment) or a data segment (data segment).

In addition, in the frequency hopping system, any one of the channels, the data channel, the primary fixed channel, the secondary fixed channel, and the fixed channel, which are described in the embodiments of the present application, may be understood as a different channel occupied by each frequency hopping. For non-frequency hopping systems, such as ETSI regulations, uplink and downlink frequency hopping is not required, a fixed segment may be referred to as a channel, and each data frame in a data segment may be referred to as a channel. The number of channels may also be understood as the number of data frames. The one data frame (data frame) refers to a data frame formed by time units with independent uplink and downlink in each data segment. It should be noted that the data segment may also refer to a general name of all data frames except for the primary fixed segment and the secondary fixed segment in the fixed channel period, and may also refer to one data frame, and when the data segment refers to one data frame, the data segment and the data frame may be interchanged. The channel duration of each channel may also be configured in advance, or may be configured through the MIB, and may be 20ms or 40ms.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, for example, a base station or a terminal device, includes a corresponding hardware structure and/or software modules for performing each function in order to implement the functions described above. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the base station and the terminal device may be divided into the functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of dividing the functional modules according to the respective functions, fig. 25 shows a schematic diagram of a possible composition of the base station referred to in the above and embodiments, which is capable of performing the steps performed by the base station in any of the method embodiments of the present application. As shown in fig. 25, the base station may include: a transmission unit 2501.

Among them, the sending unit 2501 is configured to support the base station to perform S301 in the SIB transmission method shown in fig. 3, and S301 and S303 in the SIB transmission method shown in fig. 21.

In this embodiment, further, as shown in fig. 25, the base station may further include: a processing unit 2502 and a receiving unit 2503.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

The base station provided by the embodiment of the present application is configured to execute the SIB transmission method, so that the same effect as that of the SIB transmission method can be achieved.

Fig. 26 is a schematic block diagram of a device according to an embodiment of the present disclosure, and as shown in fig. 26, the device may include at least one processor 2601, a memory 2602, a transceiver 2603, and a bus 2604.

The following specifically describes each constituent component of the apparatus with reference to fig. 26:

the processor 2601 is a control center of the device, and may be a single processor or a collection of processing elements. For example, processor 2601 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application, such as: one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

Among other things, the processor 2601 may perform various functions of the device by running or executing software programs stored within the memory 2602, as well as invoking data stored within the memory 2602.

In particular implementations, processor 2601 may include one or more CPUs, such as CPU0 and CPU1 shown in fig. 26, as one embodiment.

In particular implementations, as an embodiment, a device may include multiple processors, such as processor 2601 and processor 2605 shown in fig. 26. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The Memory 2602 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disk storage, optical disk storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 2602 may be separate and coupled to the processor 2601 via a bus 2604. The memory 2602 may also be integrated with the processor 2601.

The memory 2602 is used for storing software programs for implementing the present application, and is controlled by the processor 2601 for execution.

A transceiver 2603 for communicating with other devices or a communication network. Such as for communicating with communication Networks such as ethernet, radio Access Network (RAN), wireless Local Area Networks (WLAN), etc. If the device is a base station, the transceiver 2603 may include all or part of a baseband processor and may also optionally include an RF processor. The RF processor is used for transceiving RF signals, and the baseband processor is used for processing baseband signals converted from RF signals or baseband signals to be converted into RF signals.

In the present embodiment, the transceiver 2603 is configured to transmit SIBs N times and receive SIBs N times.

The bus 2604 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 26, but this does not indicate only one bus or one type of bus.

The configuration of the device shown in fig. 26 does not constitute a limitation of the device and may include more or fewer components than those shown, or some of the components may be combined, or a different arrangement of components.

In the case of integrated units, fig. 27 shows another possible schematic diagram of the composition of the base station involved in the above-described embodiment. As shown in fig. 27, the base station includes: a processing module 2701 and a communication module 2702.

Processing module 2701 is used to control and manage the actions of the base stations and/or other processes for the techniques described herein. The communication module 2702 is used to support communication between the base station and other network entities, such as the functional modules or network entities shown in fig. 28 and 29. Specifically, the communication module 2702 is configured to support the base station to perform S301 in fig. 3, S301 and S303 in fig. 21. The base station can also include a memory module 2703 for storing program codes and data for the base station.

The processing module 2701 may be a processor or a controller. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication module 2702 may be a transceiver, a transceiving circuit, a communication interface, or the like. The storage module 2703 may be a memory.

When the processing module 2701 is a processor, the communication module 2702 is a transceiver, and the storage module 2703 is a memory, the base station according to the embodiment of the present invention may be an apparatus shown in fig. 26.

In the case of dividing each functional module by corresponding functions, fig. 28 shows a schematic diagram of a possible composition of the terminal device according to the foregoing embodiments, which is capable of executing the steps executed by the terminal device in any of the method embodiments of the present application. As shown in fig. 28, the terminal device may include: a receiving unit 2801.

The receiving unit 2801 is configured to support the terminal device to perform S302 in the SIB transmission method shown in fig. 3, and S302 and S304 in the SIB transmission method shown in fig. 21.

In this embodiment, further, as shown in fig. 28, the terminal device may further include: a processing unit 2802, and a transmitting unit 2803.

It should be noted that all relevant contents of each step related to the method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again. The terminal device provided by the embodiment of the present application is configured to execute the SIB transmission method, so that the same effect as that of the SIB transmission method can be achieved.

In the case of an integrated unit, fig. 29 shows another possible composition diagram of the terminal device involved in the above-described embodiment. As shown in fig. 29, the terminal device includes: a processing module 2901, and a communication module 2902.

Processing module 2901 is used to control management of actions by terminal devices and/or other processes for the techniques described herein. The communication module 2902 is used for supporting communication between the terminal device and other network entities, such as the functional modules or network entities shown in fig. 25 and 27. Specifically, the communication module 2902 is used for supporting the terminal device to execute S302 in fig. 3, S302 and S304 in fig. 21. The terminal device may also include a storage module 2903 for storing program codes and data for the terminal device.

The processing module 2901 can be a processor or a controller, among others. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication module 2902 may be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 2903 may be a memory.

When the processing module 2901 is a processor, the communication module 2902 is a transceiver, and the storage module 2903 is a memory, the terminal device according to the embodiment of the present application may be the device shown in fig. 26.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media capable of storing program codes.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A System Information Block (SIB) transmission method applied to a base station or a chip of the base station, the method comprising:

in a first period in a time domain, repeatedly sending SIB for N times, wherein the SIB sent each time occupies p consecutive downlink subframes, p is a positive integer greater than 0, the first period includes m second periods, and when N is greater than or equal to m, the number of repetitions of the SIB in each of the 1 st to m-1 th second periods in the m second periods is equal to

The number of times of SIB repetition in the mth second period among the m second periods is

N is a positive integer greater than 0, m is a positive integer greater than 0,

indicating rounding up, wherein the starting time of the first SIB transmission in each second period is a time shifted by a preset offset value from the starting time of the second period to which the first SIB transmission belongs, so that a first SIB subframe in a first time unit in the second period is opposite to a main information subframeThe end subframe position of the block MIB has a time offset.

2. The method of claim 1, wherein the number of SIBs in each of the m second cycles is N/m if N is a positive integer and N is an integer power of 2, m is a positive integer and m is an integer power of 2, N is greater than or equal to m.

3. The SIB transmission method of claim 2, wherein if the SIBs are transmitted at equal intervals in N/m times in each second period, the SIBs transmitted in each second period occupy N/m time cells, and each transmitted SIB occupies one time cell.

4. The SIB transmission method of claim 2 wherein N/m SIBs transmitted in each of the second periods occupy N/m time cells, wherein the N/m time cells are transmitted consecutively, and wherein each transmitted SIB occupies one time cell.

5. The SIB transmission method of claim 3 wherein the time cell duration is T2 m/N, T2 indicating the second period duration.

6. The SIB transmission method of claim 3 or 4, wherein the time cell has a duration of 160ms.

7. The SIB transmission method of claim 1, wherein each transmitted SIB occupies 8 consecutive downlink subframes.

8. The method of claim 2, wherein if N/m consecutive transmissions of the SIB occur in each of the second periods, the N/m consecutive transmissions of the SIB occupy N × p/m consecutive downlink subframes, and p is a positive integer greater than 0.

9. The SIB transmission method of claim 3, wherein the time duration of the time cell is T2 m/N or 160ms if the SIB is transmitted N/m times in each second period, and the starting time of the SIB transmission in each time cell is shifted from the starting time of the time cell by a predetermined offset value.

10. The SIB transmission method of claim 4, wherein if N/m time cells are transmitted consecutively in each of the second periods, the time cells have a duration of 160ms, and the starting time of the SIB transmission in each of the time cells is offset from the starting time of the time cell by a predetermined offset value.

11. The SIB transmission method according to any of claims 8-10, wherein before the sending of the N SIBs, the method further comprises:

pre-configuring the preset offset value; or,

and sending a master information block MIB, wherein the MIB comprises the preset offset value.

12. The SIB transmission method according to claim 11, wherein the preset offset value is 40ms.

13. A System Information Block (SIB) transmission method applied to a terminal device or a chip of the terminal device, the method comprising:

in a first period in a time domain, receiving SIBs for N times, wherein the SIBs sent each time occupy p continuous downlink subframes, p is a positive integer greater than 0, the first period includes m second periods, and when N is greater than or equal to m, the number of times of repetition of the SIBs in each of the 1 st to m-1 st second periods among the m second periods is

N is a positive integer greater than 0, m is a positive integer greater than 0,

indicating rounding up, wherein the starting time of the first SIB transmission in each second period is a time offset by a preset offset value from the starting time of the second period to which the first SIB transmission belongs, so that a first SIB subframe in a first time unit in the second period has a time offset with respect to an ending subframe position of a master information block MIB.

14. The method of claim 13, wherein the number of SIBs in each of the m second cycles is N/m if N is a positive integer and N is an integer power of 2, m is a positive integer and m is an integer power of 2, N is greater than or equal to m.

15. The method of claim 14, wherein if the N/m SIBs are transmitted at equal intervals in each of the second periods, the N/m SIBs transmitted in each of the second periods occupy N/m time cells, and each transmitted SIB occupies one time cell.

16. The method of SIB transmission according to claim 14 wherein N/m SIBs transmitted in each of the second periods occupy N/m time cells, and wherein the N/m time cells are transmitted consecutively with each transmitted SIB occupying one time cell.

17. The SIB transmission method according to claim 15, wherein the duration of the time cell is T2 × m/N, T2 indicating the duration of the second period.

18. The SIB transmission method according to claim 15 or 16, wherein the duration of the time cell is 160 milliseconds.

19. The SIB transmission method according to claim 13, wherein each transmitted SIB occupies 8 consecutive downlink subframes.

20. The method of claim 14 wherein if N/m consecutive SIBs are transmitted in each of the second periods, the N/m consecutive SIBs occupy N × p/m consecutive downlink subframes, and p is a positive integer greater than 0.

21. A wireless communication apparatus, wherein the wireless communication apparatus is a base station or a chip of the base station, the wireless communication apparatus comprising:

a sending unit, configured to repeatedly send an SIB N times in a first period in a time domain, where the SIB sent each time occupies p consecutive downlink subframes, p is a positive integer greater than 0, the first period includes m second periods, and when N is greater than or equal to m, the number of repetitions of the SIB in each second period from a1 st second period to an m-1 st second period in the m second periods is equal to

The number of times of repeating the SIB in the mth second period of the m second periods is N-

N is a positive integer greater than 0, m is a positive integer greater than 0,

22. A wireless communication apparatus, wherein the wireless communication apparatus is a terminal device or a chip of the terminal device, and the wireless communication apparatus comprises:

a receiving unit, configured to receive, in a first period in a time domain, an SIB for N times, where the SIB sent each time occupies p consecutive downlink subframes, p is a positive integer greater than 0, the first period includes m second periods, and when N is greater than or equal to m, the number of repetitions of the SIB in each of 1 st to m-1 th second periods in the m second periods is equal to

The number of repetitions of the SIB in an mth second period of the m second periods is

N is a positive integer greater than 0, m is a positive integer greater than 0,

23. A base station, comprising: at least one processor, and a memory; it is characterized in that the preparation method is characterized in that,

the memory is for storing a computer program such that the computer program when executed by the at least one processor implements the SIB transmission method according to any of claims 1-12.

24. A terminal device, comprising: at least one processor, and a memory; it is characterized in that the preparation method is characterized in that,

the memory is for storing a computer program such that the computer program when executed by the at least one processor implements the SIB transmission method according to any of claims 13-20.

25. A computer storage medium on which a computer program is stored, which program, when being executed by a processor, carries out the SIB transmission method according to any one of claims 1-12 or the SIB transmission method according to any one of claims 13-20.