WO2015061948A1

WO2015061948A1 - Random access method, random access configuration method, device and system

Info

Publication number: WO2015061948A1
Application number: PCT/CN2013/086085
Authority: WO
Inventors: 栗忠峰; 唐臻飞
Original assignee: 华为技术有限公司
Priority date: 2013-10-28
Filing date: 2013-10-28
Publication date: 2015-05-07
Also published as: CN105284174A

Abstract

Embodiments of the present invention disclose a random access method, a random access configuration method, a device and a system. The present invention relates to the field of communications. A user equipment performs a one-time random access by using N preamble sequences, at least two time-sequence resources in the N preamble sequences in transmission being different, and the user equipment can be used to send preamble sequences on different resources to request accessing a base station, so that the base station can correctly detect the preamble sequences. The method in the embodiment of the present invention comprises: a user equipment performing a one-time random access by using N preamble sequences, N being an integer greater than or equal to 2, the user equipment determining N time-sequence resources for transmitting the N preamble sequences, each preamble sequence being corresponding one time-sequence resource, the time-sequence resource comprising a time resource and a frequency resource, at least two of the frequency resources among the N time-frequency resources being mutually different; and the user equipment sending the N preamble sequences to a base station on the N time-frequency resources, so as to request randomly accessing the base station.

Description

The present invention relates to the field of communications, and in particular, to a random access method, a random access configuration method, a device, and a system. Background technique

In the existing communication system, for example, Global System for Mobile Communications (GSM), Long Term Evolution (LTE), random access is the first step for the user equipment to start communication with the base station. Whether the random access technology is reliable or not will affect the communication between the user equipment and the base station, and has the functions of uplink synchronization, user equipment (UE), sequence detection, resource request, UE identification, or allocation. In the prior art, different random access preamble formats for random access are defined in the LTE system, and the random access preamble format is composed of a Cyclic Prefix (CP) and a preamble sequence and a guard time. The preamble sequence carried by each random access preamble format is located on the same frequency resource. For a Frequency Division Duplexing (FDD) system, there is at most one random access frequency resource in each subframe. For a Time Division Duplexing (TDD) system, there may be one or more random access frequency resources in each subframe, but the preamble sequence in the same random access preamble format is always located in a random access frequency resource. on.

When the device performs random access, when the frequency resource used for random access is in the frequency range of deep fading, the base station may detect the preamble sequence error. SUMMARY OF THE INVENTION Embodiments of the present invention provide a random access method, a random access configuration method, a device, and a system, where a user equipment performs random access by using N preamble sequences, and transmits N time-frequency of the N preamble sequences. At least two of the resources are different, so that the user equipment can send the preamble sequence to access the base station on different resources, so that the base station can correctly detect the preamble sequence. In order to achieve the above object, the technical solution adopted by the embodiment of the present invention is

In a first aspect, a random access method is provided. The user equipment performs a random access by using N preamble sequences, where the N is an integer greater than or equal to 2. The method includes: the user equipment determines to be used for transmission. The N time-frequency resources of the N preamble sequences, each of the preamble sequences corresponding to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least two of the frequency resources of the N time-frequency resources are mutually Not the same;

And the user equipment sends the N preambles to the base station on the N time-frequency resources, to request random access to the base station.

In a first possible implementation of the first aspect, according to the first aspect,

The user equipment determines N time-frequency resources for transmitting the N preamble sequences, including:

Receiving, by the user equipment, first configuration information that is sent by the base station, where the first configuration information includes information used to indicate the N time-frequency resources;

The user equipment determines, according to the first configuration information, N time-frequency resources for transmitting the N preamble sequences.

In a second possible implementation manner of the first aspect, the determining, by the user equipment, the N time-frequency resources for transmitting the N preamble sequences, includes:

Receiving, by the user equipment, second configuration information that is sent by the base station, where the second configuration information includes format information of N preamble sequences configured by the base station for the user equipment;

And determining, by the user equipment, N time-frequency resources for transmitting the N preamble sequences according to the second configuration information.

In a third possible implementation manner of the first aspect, in combination with the first aspect or the first possible implementation manner or the second possible implementation manner of the first aspect, in each of the N time-frequency resources In the time-frequency resource, the frequency resource is a narrowband frequency point configured by the base station, the narrowband frequency point is a part of a carrier frequency configured by the base station, and a frequency width of the narrowband frequency point is smaller than a frequency width of the carrier frequency. .

In a fourth possible implementation manner of the first aspect, in combination with the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner or the third possible implementation manner, In each time-frequency resource of N time-frequency resources, the time resource includes Transmitting a first time resource of the preamble sequence and a second time resource serving as a post guard interval of the transmission preamble sequence, wherein the first time resource is connected to the second time resource in time.

In a fifth possible implementation manner of the first aspect, in combination with the fourth possible implementation manner of the first aspect, the first time resource used for transmitting the preamble sequence is at least one preamble symbol;

The duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol, and is equal to one of the integer fractions of the data symbol; For transferring data. In a sixth possible implementation manner of the first aspect, the N preamble sequence is combined with the first aspect or the first possible implementation manner of the first aspect to any one of the fifth possible implementation manners. For the same sequence.

In a second aspect, a method for configuring a random access is provided, where the base station configures, for the user equipment, N time-frequency resources for transmitting N preamble sequences, where the N is an integer greater than or equal to 2, including:

The base station determines N time-frequency resources for transmitting the N preamble sequences, each preamble sequence corresponds to one time-frequency resource, and the time-frequency resource includes a time domain resource and a frequency domain resource, and the N time-frequency resources At least two of the frequency resources of the resources are different from each other;

The base station sends first configuration information to the user equipment, where the first configuration information includes information used to indicate the N time-frequency resources. In a first possible implementation manner of the second aspect, in combination with the second aspect, in each time-frequency resource of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by the base station, and the narrowband The frequency point is a part of a carrier frequency configured by the base station, and a frequency width of the narrowband frequency point is smaller than a frequency width of the carrier frequency.

In a second possible implementation manner of the second aspect, in combination with the second aspect or the first possible implementation manner of the second aspect, in each time-frequency resource of the N time-frequency resources, the time The resource includes a first time resource for transmitting the preamble sequence and is used as a transmission preamble a second time resource of the post-protection interval of the sequence, where the first time resource and the second time resource are connected in time.

In a third possible implementation manner of the second aspect, in combination with the second possible implementation manner of the second aspect, the first time resource used for transmitting the preamble sequence is at least one preamble symbol;

The duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol, and is equal to one integer of the data symbol; the data symbol is used for Data other than the preamble sequence is transmitted.

In a third aspect, a user equipment is provided, where the user equipment performs a random access by using N preamble sequences, where the N is an integer greater than or equal to 2, and the user equipment includes: a determining unit, configured to determine For transmitting N time-frequency resources of the N preamble sequences, each preamble sequence corresponds to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least 2 of the frequency resources of the N time-frequency resources Different from each other;

And a sending unit, configured to send, by using the N time-frequency resources, the N preambles to the base station, to request random access to the base station.

In a first possible implementation manner of the third aspect, the user equipment, according to the third aspect,

a first receiving unit, configured to receive first configuration information that is sent by the base station, where the first configuration information includes information used to indicate the N time-frequency resources;

The determining unit is specifically configured to determine, according to the first configuration information received by the first receiving unit, N time-frequency resources used for transmitting the N preamble sequences.

In a second possible implementation manner of the third aspect, the user equipment, according to the third aspect,

a second receiving unit, configured to receive second configuration information sent by the base station, where the second configuration information includes format information of N preamble sequences configured by the base station for the user equipment;

The determining unit is specifically configured to determine, according to the second configuration information received by the second receiving unit, N time-frequency resources for transmitting the N preamble sequences. In a third possible implementation manner of the third aspect, in combination with the third aspect or the first possible implementation manner or the second possible implementation manner of the third aspect, in each of the N time-frequency resources In the time-frequency resource, the frequency resource is a narrowband frequency point configured by the base station, the narrowband frequency point is a part of a carrier frequency configured by the base station, and a frequency width of the narrowband frequency point is smaller than a frequency width of the carrier frequency. .

In a fourth possible implementation manner of the third aspect, in combination with the third aspect or the first possible implementation manner of the third aspect or the second possible implementation manner or the third possible implementation manner, In each of the time-frequency resources of the N time-frequency resources, the time resource includes a first time resource for transmitting the preamble sequence, and a second time resource serving as a post-protection interval of the transmission preamble sequence, the first time The resource is connected to the second time resource in time.

In a fifth possible implementation manner of the third aspect, in combination with the fourth possible implementation manner of the third aspect, the first time resource used for transmitting the preamble sequence is at least one preamble symbol;

The duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol, and is equal to one of the integer fractions of the data symbol; For transferring data. In a sixth possible implementation manner of the third aspect, the N preamble sequence is combined with the third aspect or the first possible implementation manner of the third aspect to any one of the fifth possible implementation manners. For the same sequence.

The fourth aspect provides a base station, where the base station configures, for the user equipment, N time-frequency resources for transmitting N preamble sequences, where the N is an integer greater than or equal to 2, and the base station includes:

a determining unit, configured to determine N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the N At least two of the frequency resources of the time-frequency resource are different from each other;

a sending unit, configured to send first configuration information to the user equipment, where the first configuration is The information includes information indicating the N time-frequency resources. In a first possible implementation manner of the fourth aspect, in combination with the fourth aspect, in each time-frequency resource of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by the base station, and the narrowband The frequency point is a part of a carrier frequency configured by the base station, and a frequency width of the narrowband frequency point is smaller than a frequency width of the carrier frequency.

In a second possible implementation manner of the fourth aspect, in combination with the fourth aspect or the first possible implementation manner of the second aspect, in each time-frequency resource of the N time-frequency resources, the time The resource includes a first time resource for transmitting the preamble sequence, and a second time resource serving as a post guard interval for transmitting the preamble sequence, the first time resource being connected to the second time resource in time.

In a third possible implementation manner of the fourth aspect, in combination with the second possible implementation manner of the fourth aspect, the first time resource used for transmitting the preamble sequence is at least one preamble symbol;

In a fifth aspect, a user equipment is provided, where the user equipment performs a random access by using N preamble sequences, where the N is an integer greater than or equal to 2. The user equipment includes: a processor, configured to determine For transmitting N time-frequency resources of the N preamble sequences, each preamble sequence corresponds to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least 2 of the frequency resources of the N time-frequency resources Different from each other;

And a transmitter, configured to send, by using the N time-frequency resources, the N preamble sequences to the base station, to request random access to the base station.

In a first possible implementation manner of the fifth aspect, the user equipment further includes: a receiver, configured to receive first configuration information that is sent by the base station, where the first configuration information includes Information indicating the N time-frequency resources; The processor is specifically configured to determine, according to the first configuration information received by the receiver, N time-frequency resources used for transmitting the N preamble sequences.

In a second possible implementation manner of the fifth aspect, the user equipment, according to the fifth aspect,

a receiver, configured to receive second configuration information sent by the base station, where the second configuration information includes format information of N preamble sequences configured by the base station for the user equipment;

The processor is specifically configured to determine, according to the second configuration information received by the receiver, N time-frequency resources for transmitting the N preamble sequences.

In a third possible implementation manner of the fifth aspect, in combination with the first possible implementation manner or the second possible implementation manner of the fifth aspect or the fifth aspect, each of the N time-frequency resources In the time-frequency resource, the frequency resource is a narrowband frequency point configured by the base station, the narrowband frequency point is a part of a carrier frequency configured by the base station, and a frequency width of the narrowband frequency point is smaller than a frequency width of the carrier frequency. .

In a fourth possible implementation manner of the fifth aspect, in combination with the first possible implementation manner of the fifth aspect or the fifth aspect, or the second possible implementation manner or the third possible implementation manner, In each of the time-frequency resources of the N time-frequency resources, the time resource includes a first time resource for transmitting the preamble sequence, and a second time resource serving as a post-protection interval of the transmission preamble sequence, the first time The resource is connected to the second time resource in time.

In a fifth possible implementation manner of the fifth aspect, in combination with the fourth possible implementation manner of the fifth aspect, the first time resource used for transmitting the preamble sequence is at least one preamble symbol;

The duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol, and is equal to one of the integer fractions of the data symbol; For transferring data. In a sixth possible implementation manner of the fifth aspect, the N preamble sequence is combined with the fifth aspect or the first possible implementation manner of the fifth aspect to any one of the fifth possible implementation manners. For the same sequence. The sixth aspect provides a base station, where the base station configures, for the user equipment, N time-frequency resources for transmitting N preamble sequences, where the N is an integer greater than or equal to 2, and the base station includes:

a processor, configured to determine N time-frequency resources for transmitting the N preamble sequences, each preamble sequence corresponding to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the N At least two of the frequency resources of the time-frequency resource are different from each other;

And a transmitter, configured to send first configuration information to the user equipment, where the first configuration information includes information used to indicate the N time-frequency resources. In a first possible implementation manner of the sixth aspect, in combination with the sixth aspect, in each time-frequency resource of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by the base station, and the narrowband The frequency point is a part of a carrier frequency configured by the base station, and a frequency width of the narrowband frequency point is smaller than a frequency width of the carrier frequency.

In a second possible implementation manner of the sixth aspect, in combination with the sixth aspect or the first possible implementation manner of the second aspect, in each time-frequency resource of the N time-frequency resources, the time The resource includes a first time resource for transmitting the preamble sequence, and a second time resource serving as a post guard interval for transmitting the preamble sequence, the first time resource being connected to the second time resource in time.

In a third possible implementation manner of the sixth aspect, in combination with the second possible implementation manner of the sixth aspect, the first time resource used for transmitting the preamble sequence is at least one preamble symbol;

The seventh aspect provides a random access system, including the third aspect or the first possible implementation manner of the third aspect to any one of the fifth possible implementation manner, or the fifth aspect or the fifth aspect The first possible implementation to the user equipment of any one of the fifth possible implementations, and the fourth aspect or the first possible implementation of the fourth aspect The method to any one of the third possible implementation manners, or the base station of the sixth aspect, or the first possible implementation manner of the sixth aspect, to any one of the third possible implementation manners. A random access method, a random access configuration method, a device, and a system are provided by the user equipment, where the user equipment uses N preamble sequences to perform a random access, where the N is an integer greater than or equal to 2, specifically, the user The device determines N time-frequency resources for transmitting the N preamble sequences, each preamble sequence corresponds to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least 2 of the frequency resources of the N time-frequency resources The user equipment sends the N preamble sequences to the base station on the N time-frequency resources for requesting random access to the base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set forth in the description of the claims Other drawings can also be obtained from these drawings on the premise of creative labor. FIG. 1 is a schematic flowchart of a random access method according to an embodiment of the present invention; FIG. 2A and FIG. 2D are schematic diagrams showing time-frequency resources of two preamble sequences according to an embodiment of the present invention;

3 is a schematic flow chart of a method for configuring random access according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of another random access method according to an embodiment of the present invention; FIG. 5 is a schematic flowchart of another random access method according to an embodiment of the present disclosure; FIG. 6 is a schematic diagram of an apparatus for a user equipment according to an embodiment of the present invention; FIG. 8 is a schematic diagram of another apparatus for a user equipment according to an embodiment of the present invention; FIG. 8 is a schematic diagram of another user equipment according to an embodiment of the present invention; FIG. 9 is a schematic diagram of another apparatus for user equipment according to an embodiment of the present invention; FIG. 10 is a schematic diagram of a device of a user equipment according to an embodiment of the present invention; FIG. 11 is a schematic diagram of a base station according to an embodiment of the present invention; FIG. 12 is a schematic diagram of another apparatus for a base station according to an embodiment of the present invention; FIG. 13 is a schematic diagram of a system for random access according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

The technical solution provided by the embodiment of the present invention can be applied to various wireless communication networks, for example, a global system for mobile communication (GSM) system, a code division multiple access (CDMA) system. Wideband code division multiple access (WCDMA) system, universal mobile telecommunication system (UMTS) system, general packet radio service (GPRS) system, The long term evolution (LTE) system, the advanced long term evolution advanced (LTE-A) system, and the worldwide interoperability for microwave access (WiMAX) system. The terms "network" and "system" can be replaced with each other. For example, in an LTE system, different random access preamble formats for random access are defined, and in the GSM system, different random access bursts (bursts) for random access are also defined. In the embodiment of the invention, the random access preamble format defined in the LTE system is For example, the embodiment of the present invention can be applied to a random access burst in the GSM system, and can also be applied to other communication systems, but the embodiment of the present invention does not limit this. In the embodiment of the present invention, a base station (BS) may be a device that communicates with a user equipment (UE) or other communication station, such as a relay station, and the base station may provide communication in a specific physical area. cover. For example, the base station may be a base transceiver station (Base Transceiver Station, BTS for short) or a base station controller (BSC) in GSM or CDMA; or may be a Node B in UMTS (Node B, abbreviated as NB) or Radio Network Controller (RNC) in UMTS; also an evolved base station in LTE

(Evolutional Node B, abbreviated as ENB or eNodeB); or it may be another access network device in the wireless communication network that provides access services, which is not limited by the present invention.

In the embodiment of the present invention, the UEs may be distributed throughout the wireless network, and each UE may be static or mobile. A UE may be referred to as a terminal, a mobile station, a subscriber unit, a station, or the like. The UE can be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer.

(laptop computer), cordless phone, wireless local loop (WLL). When the UE is applied to the M2M mode communication, the UE may be referred to as an M2M terminal, and may specifically be a smart meter, a smart home appliance, or the like that supports M2M communication. The embodiments of the present invention are described from the base station side and the user equipment side respectively, and the cooperation examples of the two are described at the same time, but this does not mean that the two must be implemented together. In fact, when the base station is implemented separately from the user equipment, It also solves the problems existing on the network side and the user equipment side respectively, but when combined, the two will obtain better technical effects. Referring to FIG. 1 , which is a schematic diagram of a random access method on a user equipment side, the user equipment performs a random access by using N preamble sequences, where N is an integer greater than or equal to 2, and as shown in the figure, the following steps may be included:

101: The user equipment determines N time-frequency resources used for transmitting the N preamble sequences, Each of the preamble sequences corresponds to one time-frequency resource, and the time-frequency resource includes a time resource and a frequency resource, and at least two of the frequency resources of the N time-frequency resources are different from each other;

The user equipment determines that the N time-frequency resources used for transmitting the N preamble sequences may specifically include two aspects:

(1) The user equipment determines format information of the N preamble sequences, wherein the format information includes a value of N, and/or a sequence included in each preamble sequence. The optional format information may be a preamble format of the existing system. The value of the N may be determined according to the downlink measurement of the user equipment or determined according to the received signaling.

The sequence may be a randomly generated sequence, or may be a predefined sequence, or a sequence generated according to the existing system method, because the implementation of the object of the present invention does not affect the implementation of the present invention. In addition, the N preamble sequences may include the same sequence, and may also include different sequences, and the same does not affect the implementation of the object of the present invention. The preamble format of the existing system is preamble format 0, preamble format 1, preamble format 2, preamble format 3, and preamble format 4.

(2) The user equipment determines information of time-frequency resources of each of the N preamble sequences.

The information of the time-frequency resource of each preamble sequence includes the information of the time domain resource of the preamble sequence and the information of the frequency domain resource, where the time domain resource includes a first time resource for transmitting the preamble sequence, where the The first time resource of the transmission preamble sequence is at least one preamble symbol. For example, a preamble sequence includes L preamble symbols, and the duration of each preamble symbol is denoted as Tp, and the first time resource of the preamble sequence is L*Tp, where L is an integer greater than or equal to 1.

The duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol, and is equal to one of the integer fractions of the data symbol; For transferring data. Preferably, the duration of each preamble symbol is less than the duration of the data symbol and is equal to an integer fraction of the data symbol, such that the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer. It is beneficial to improve the performance of the base station for detecting the preamble sequence.

Preferably, in order to prevent inter-symbol interference due to timing inaccuracy, in the N time-frequency In each of the time-frequency resources of the resource, the time resource includes a first time resource for transmitting a preamble sequence, and a second time resource serving as a post-protection interval of the transmission preamble sequence, the first time resource. Connected to the second time resource in time.

Preferably, in order to avoid that the performance of the preamble sequence is affected due to power climb and/or timing inaccuracy, in each time-frequency resource of the N time-frequency resources, the time resource includes a first part for transmitting a preamble sequence. a time resource, and a second time resource serving as a post-protection interval of the transmission preamble sequence, and a third time resource serving as a pre-protection time of the transmission preamble sequence, the third time resource, the first time resource Connected to the second time resource in time.

Preferably, in order to enhance coverage, in each time-frequency resource of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by the base station, and the narrowband frequency point is in a carrier frequency configured by the base station. In part, the frequency bandwidth of the narrowband frequency point is smaller than the frequency width of the carrier frequency.

The details will be described below.

For example, in the prior art, the frequency domain bandwidth occupied by one preamble sequence is greater than or equal to the minimum frequency domain bandwidth occupied by the data channel. For example, in the LTE system, the preamble sequence occupies 6 physical resource blocks of 1.08 MHz, and the data channel is minimum. A physical resource block of 180 kHz is occupied; in the GSM system, a random access burst for random access occupies the same channel bandwidth as the data channel, and is 200 kHz.

In the embodiment of the present invention, if the average of 200 kHz is divided into 2000, there are 2000 narrowband frequencies of 100 Hz, that is, frequency points, within 200 kHz.

Compared with the prior art, narrowband transmission (corresponding to a carrier frequency of 100 Hz), because the bandwidth is reduced, the transmission power is kept constant, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing coverage.

It should be noted that, for the LTE system, the frequency width of the carrier frequency may be referred to as a transmission bandwidth or a system bandwidth, and the bandwidth unit may be represented by a resource block (RB), for example, may be 15 or 25 or 50 or 100 RB, and the narrow band at this time The frequency width of the frequency point may be less than the carrier frequency bandwidth of 6 RB, or when the carrier frequency bandwidth is 6 RB, and the frequency bandwidth of the narrowband frequency point is 3 RB. Specifically, the user equipment determines that the N time-frequency resources used for transmitting the N preamble sequences can be implemented by using any one of the following four manners.

First way

In this manner, the user equipment determines the format information of the N preamble sequences and the information of the time-frequency resources of each of the N preamble sequences in a predefined manner. For example, the system pre-defines the format information of the N preamble sequences and the information of the time-frequency resources of each of the N preamble sequences, and pre-stores the format information and N of the system pre-defined N preamble sequences in the user equipment and the base station, respectively. Information about the time-frequency resources of each of the preamble sequences.

Second way

In this manner, the user equipment determines the format information of the N preamble sequences in a predefined manner, and the information of the time-frequency resources of each of the N preamble sequences is configured by the base station.

Specifically, it can be achieved through the following process:

The user equipment determines, according to the first configuration information, and the format information of the predefined N preamble sequences, N time-frequency resources used for transmitting the N preamble sequences. The information of the N time-frequency resources indicated by the first configuration information may include: the base station configures one of the carrier frequencies for the N preamble sequences. For example, the base station may configure M carrier frequency Absolute Radio Frequency Channel Numbers (ARFCNs) as the carrier frequency sets for the N preamble sequences. For example, the carrier frequency set included in the frequency band GSM850 is a carrier frequency in which the ARFCN value is in the range of 128 n 251, wherein the frequency band GSM850 is the 850 MHz ( Mega Hertz, referred to as MHz) frequency band of the GSM frequency. The carrier frequency corresponding to each ARFCN value is the carrier frequency used by the corresponding DL when the ARFCN value is n and the carrier frequency used by the corresponding UL when the corresponding ARFCN value is n, wherein the carrier frequency used by the corresponding DL when the ARFCN value is n It can be expressed by Fl(n). When the ARFCN value is n, the carrier frequency used by the corresponding UL can be represented by Fu(n). When the ARFCN value is n, the relationship between F1(n) and Fu(n) can be Expressed in the following table, as shown in Table 1: Table 1

In the above formulas, the output unit of each type is MHz, and the carrier channel bandwidth corresponding to each n value in the range of 128 n 251, that is, the ARFCN value is 200 kHz. When the base station configures frequency points for each of the N preamble sequences, the base station first selects N carrier frequencies from the set of M carrier frequencies, and then configures the frequency points. For example, for narrowband transmission, the base station configures frequency points in one carrier frequency for each of the N preamble sequences, in the following two configuration methods:

1) The base station indicates, for the first preamble sequence of the N preamble sequences, a first frequency point on the first carrier frequency corresponding to the first preamble sequence, and respectively determines each of the N preamble sequences except the first preamble sequence The relationship between the frequency point corresponding to the preamble sequence and the first frequency point has the following relationships: a) The frequency points corresponding to each preamble sequence except the first preamble sequence among the N preamble sequences are in the corresponding carrier. The position of the frequency is the same as the position of the first frequency point at the first carrier frequency; for example, the first carrier frequency may be fl, and the carrier frequency corresponding to each preamble sequence except the first preamble sequence may be f2, f3, . ...., fn, if the frequency point at which the base station gives the carrier frequency fl of the first preamble sequence is the second frequency point of fl, the frequency points corresponding to each preamble sequence except the first preamble sequence are respectively F2, f3, ....., the second frequency point of fn. b) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence has a fixed relative offset value at a position of the corresponding carrier frequency relative to the first frequency point at a position of the first carrier frequency For example, if the frequency point configured by the base station to the carrier frequency fl of the first preamble sequence is the location where 100*2 of fl is located, the frequency points corresponding to each preamble sequence except the first preamble sequence are respectively f2, f3 , ..... , the position of the remainder of fn's (100*2+100) / (200* 10e3).

c) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence at a position of the corresponding carrier frequency with respect to the position of the first frequency point at the first carrier frequency There is a relative offset value associated with the logical number of the preamble sequence;

For example, if the base station assigns the frequency of the carrier frequency fl of the first preamble sequence to the position where 100*2 of fl is located, the frequency point corresponding to the second preamble sequence is the carrier frequency f2.

(100*2+ ( 2-1 ) 100 ) /(200* 10e3) The position of the remainder obtained, the frequency point corresponding to the third preamble sequence is the carrier frequency f3 (100* ² + ( 3-1 ) 100 ) /(200* 10e3) The position of the remainder obtained, ..., the frequency point corresponding to the nth preamble sequence is the carrier frequency fn (100*2+

( 3-1 ) 100 ) /(200* 10e3) The position of the remainder obtained. d) The frequency points corresponding to each of the N preamble sequences except the first preamble sequence are at random positions of the corresponding carrier frequencies.

For example, the frequency point at which the base station allocates the carrier frequency fl of the first preamble sequence is the second frequency point of fl, and the frequency point corresponding to the second preamble sequence by the base station is the 136th frequency point of the carrier frequency f2, the third The frequency point corresponding to the preamble sequence is the 1985th frequency point of the carrier frequency f3, ..., and the frequency point corresponding to the nth preamble sequence is the third frequency point of the carrier frequency fn. The frequency point corresponding to each of the N preamble sequences except the first preamble sequence is independent of the position of the first carrier frequency at the position of the corresponding carrier frequency and the first frequency point corresponding to the first preamble sequence.

2) The base station indicates, for each preamble sequence of the N preamble sequences, a frequency point on the carrier frequency corresponding to each preamble sequence.

Exemplarily, the base station indicates a time period for the N preamble sequences. For example, in the LTE system, the base station indicates one or more subframes or one or more frames for the N preamble sequences. In the GSM system, the base station is randomly connected. A burst indicates one or more time slots or burst times or one or more frames. Third way

In this manner, the user equipment determines the information of the time-frequency resources of each of the N preamble sequences in a predefined manner, and the format information of the N preamble sequences is configured by the base station.

Specifically, it can be achieved through the following process: The user equipment receives the second configuration information sent by the base station, where the second configuration information includes format information of the N preamble sequences configured by the base station for the user equipment;

And determining, by the user equipment, the N time-frequency resources used for transmitting the N preamble sequences according to the second configuration information, and the information of the time-frequency resources of each of the predefined N preamble sequences.

Fourth way

In this manner, the information of the time-frequency resources of each of the N preamble sequences and the format information of the N preamble sequences are all configured by the base station.

This can be achieved in the following ways:

The user equipment receives the first configuration information and the second configuration information that are sent by the base station, where the first configuration information includes information used to indicate the N time-frequency resources, and the second configuration information includes N configured by the base station for the user equipment. Format information of the preamble sequence;

The user equipment determines, according to the first configuration information and the second configuration information, N time-frequency resources for transmitting the N preamble sequences.

Preferably, if the number of user equipments is very large, the user equipments may be grouped, and the user equipments in the same group use the same time-frequency resources, and each user equipment performs code division on the resources; different groups of user equipments use different The time-frequency resource performs the transmission of the preamble sequence. Different sets of user equipments respectively send N preamble sequences according to different time domain resources and different frequency resources. For example, user equipments in the same group send N preamble sequences on the same frequency resource and time domain resource; different groups The user equipment transmits N preamble sequences on mutually orthogonal time domain resources and frequency resources within a time corresponding to the N preamble sequences. Exemplarily, the mutually orthogonal time domain resources and frequency resources include the same time domain resources and different frequency resources, the time domain resources are different, the frequency domain resources are the same, and the time domain resources and the frequency resources are different.

102: The user equipment sends the N preamble sequences to the base station on the N time-frequency resources, and is used to request random access to the base station. Specifically, a process is performed by using a user equipment as an example. The time domain resource of the user equipment includes a first time resource for transmitting N preamble sequences and a second guard interval used as a transmission preamble sequence. Time resource, where N preamble sequences can be used separately Pl~pN indicates that the post-protection time of each preamble sequence can be represented by T _G , the user equipment can be represented by gl, and the post-protection time of the first preamble sequence and the first preamble sequence can be represented by pl_gl+T _G It is indicated that the post-protection time of the second preamble sequence and the second preamble sequence can be represented by p2 - gl + T _G , ..., the post-protection time of the N-th preamble sequence and the N-th preamble sequence can be pN-gl + T _G indicates that the carrier frequencies occupied by the N preamble sequences can be represented by F1, F2, and FN, respectively. Table 2 shows the case where the user equipment transmits the time domain resources and frequency resources respectively occupied by the N preamble sequences. Table 2

Similarly, the user equipment in the group is taken as an example. The time domain resources in the group include a first time resource for transmitting the preamble sequence and a second time resource used as a post guard interval for transmitting the preamble sequence. The first preamble sequence can be represented by pl~pN respectively, and the post-protection time of each preamble sequence can be represented by T _G , and the M group user equipment can be represented by gl , g2 , gM respectively, in the first group The post-protection time of the first preamble sequence and the first preamble sequence may be represented by pi-gl+T _G , and the guard time of the second preamble sequence and the second preamble sequence in the first group may be p2-gl+T _G Representing, ..., the post-protection time of the N-th preamble and the N-th preamble in the first group can be expressed by pN-gl+T _G , ..., the first preamble sequence in the M-th group The post-protection time of the first preamble can be pi-gM+T. It is to be noted that the post-protection time of the second leader sequence and the second leader sequence in the M group can be represented by p2-gM+T _G , and the N-th preamble and the N-th preamble in the M-th group are The guard time can be represented by pN-gM+T _G. The carrier frequencies occupied by the N preamble sequences can be represented by Fl, F2 and FN respectively. The M group user equipment sends the time domain resources and frequency resources respectively occupied by the N preamble sequences. The situation is shown in Table 3. Time domain resource of a preamble sequence

Fl pl_gl+ T _G pl_g2+ T _G • . · l_gM+ T _G

F2 P2_gM+ T _G p2_gl+ T _G P2_g2+ T _G • .

• . . . • • • • • • • • • ·

FN PN_g2+ T _G • · . pN_gM+ T _G pN_gl+ T _G See Figure 2A - Figure 2D for the transmission of the preamble sequence in different cases. The abscissa indicates the time domain resource, the ordinate indicates the frequency domain resource, and the slash fill The rectangle represents the leading sequence.

In FIG. 2A, a narrowband preamble sequence is included, the narrowband preamble sequence having a post guard time

The duration of the TG, preamble sequence and post-protection time TG may be the duration of the narrowband data burst or an integer multiple of the burst length of GSM.

The preamble sequence is transmitted both at frequency fl and also at frequency f2.

In this manner, the user equipment transmits the preamble sequence simultaneously on multiple frequency resources, which can be regarded as a multi-carrier transmission.

In FIG. 2B, a narrowband preamble sequence is included, the narrowband preamble sequence having a post guard time

The preamble sequence is transmitted on frequency fl or, at frequency f2.

In this manner, the user equipment transmits the preamble sequence only on one frequency resource during the duration of the preamble sequence, which may result in poor detection performance of the preamble sequence due to deep fading.

In Fig. 2C, two narrow-band preamble sequences are included, and a guard time TG, a preamble sequence and a post-protection time are attached after each sequence (TB-2TG)/2 of the narrow-band preamble sequence at the same time.

The duration of the TG can be the duration of the narrowband data burst or an integer multiple of the GSM burst length.

The two preamble sequences are transmitted at the same time and on different frequencies.

In this manner, the user equipment simultaneously transmits the preamble sequence on multiple frequency resources, which can be regarded as a multi-carrier transmission.

In Fig. 2D, after two guard band times TG are attached to the two narrow-band preamble sequences transmitted at different times, the time becomes a continuous duration, and the preamble sequence and the guard time are continued. The time can be an integer multiple of the narrowband data burst duration or the GSM burst length.

The two preamble sequences are transmitted at different times and on different frequencies.

The transmission method of the preamble sequence is a single carrier transmission, and at least two preamble sequences are transmitted in different frequency resources, thereby improving the success rate of random access.

A random access method is provided by the embodiment of the present invention. The user equipment performs a random access by using N preamble sequences, where the N is an integer greater than or equal to 2. Specifically, the user equipment determines to transmit the N preamble sequences. Each time-frequency resource, each preamble sequence corresponds to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least two of the frequency resources of the N time-frequency resources are different from each other; the user equipment is at the N The N preamble sequences are sent to the base station on the time-frequency resources for requesting random access to the base station. The probability that multiple frequency resources are located in the deep fading frequency range is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence.

Moreover, 窄 narrowband transmission (corresponding to a carrier frequency with a bandwidth of 100 Hz), the bandwidth is reduced, the transmission power is kept constant, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing the coverage; The time is equal to an integer fraction of the duration of the data symbol, so that the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer, which is beneficial to improving the detection performance of the base station for the preamble sequence; Prevent inter-symbol interference due to timing inaccuracy; the pre-protection time can be set to avoid the performance of the preamble sequence being affected due to power climb and/or timing inaccuracy or multipath interference. FIG. 3 is a schematic flowchart of a method for configuring a random access on a base station side, where the base station configures, for the user equipment, N time-frequency resources for transmitting N preamble sequences, where the N is an integer greater than or equal to 2, as shown in FIG. As shown, the following steps can be included:

301. The base station determines N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the N time-frequency resources At least two of the frequency resources of the resources are different from each other;

The N time-frequency resources for transmitting the N preamble sequences may include two aspects:

1. The format information of the N preamble sequences, where the format information includes the value of N, And the sequence contained in each leader sequence.

The sequence may be a randomly generated sequence, or may be a predefined sequence, as it does not affect the implementation of the object of the present invention. In addition, the N preamble sequences may include the same sequence, and may also include different sequences, and the same does not affect the implementation of the object of the present invention.

2. Information about time-frequency resources of each preamble sequence in the N preamble sequences.

The information of the time-frequency resource of each preamble sequence includes the information of the time domain resource of the preamble sequence and the information of the frequency domain resource resource, where the time domain resource includes a first time resource for transmitting the preamble sequence, where The first time resource for transmitting the preamble sequence is at least one preamble symbol. For example, a preamble sequence includes L preamble symbols, and each preamble symbol has a duration of Tp, and the first time resource of the preamble sequence is L*Tp.

Preferably, in order to prevent inter-symbol interference due to timing inaccuracy, in each time-frequency resource of the N time-frequency resources, the time resource includes a first time resource for transmitting a preamble sequence, and includes And a second time resource used as a post-protection interval of the transmission preamble sequence, where the first time resource and the second time resource are connected in time.

Preferably, in order to enhance the coverage, in each of the time-frequency resources of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by the base station, and the narrowband frequency point is configured by the base station. A portion of the carrier frequency, the frequency bandwidth of the narrowband frequency point being less than a frequency width of the carrier frequency.

The details will be described below.

It should be noted that, for the LTE system, the frequency width of the carrier frequency may be referred to as a transmission bandwidth or a system bandwidth, and the bandwidth unit may be represented by a resource block (RB), for example, may be 6 RB, and the frequency bandwidth of the narrowband frequency point may be Less than 6RB, such as 3RB.

302. The base station sends first configuration information to the user equipment, where the first configuration information includes information used to indicate the N time-frequency resources.

The user equipment determines the format information of the N preamble sequences in a predefined manner, and the information of the time-frequency resources of each of the N preamble sequences is configured by the base station. The information of the N time-frequency resources indicated by the first configuration information may include: the base station configures one of the carrier frequencies for the N preamble sequences. For example, the base station may configure M carrier frequency Absolute Radio Frequency Channel Numbers (ARFCNs) as the carrier frequency sets for the N preamble sequences. For example, the carrier frequency set included in the frequency band GSM850 is a carrier frequency in which the ARFCN value is in the range of 128 n 251, wherein the frequency band GSM850 is the 850 MHz ( Mega Hertz, referred to as MHz) frequency band of the GSM frequency. The carrier frequency corresponding to each ARFCN value is the carrier frequency used by the corresponding DL when the ARFCN value is n and the carrier frequency used by the corresponding UL when the corresponding ARFCN value is n, wherein the carrier frequency used by the corresponding DL when the ARFCN value is n Can use Fl(n) It can be said that when the ARFCN value is n, the carrier frequency used by the corresponding UL can be represented by Fu(n), and the relationship between the ARFCN value of n and Fl(n) and Fu(n) can be expressed by the following table. As shown in Table 4: Table 4

1) The base station indicates, for the first preamble sequence of the N preamble sequences, a first frequency point on the first carrier frequency corresponding to the first preamble sequence, and respectively determines each of the N preamble sequences except the first preamble sequence The relationship between the frequency point corresponding to the preamble sequence and the first frequency point has the following relationships: a) The frequency points corresponding to each preamble sequence except the first preamble sequence among the N preamble sequences are in the corresponding carrier. The position of the frequency is the same as the position of the first frequency point at the first carrier frequency; for example, the first carrier frequency may be fl, and the carrier frequency corresponding to each preamble sequence except the first preamble sequence may be f2, f3, . ...., fn, if the frequency point at which the base station gives the carrier frequency fl of the first preamble sequence is the second frequency point of fl, the frequency points corresponding to each preamble sequence except the first preamble sequence are respectively F2, f3, ....., the second frequency point of fn. b) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence has a fixed relative offset value at a position of the corresponding carrier frequency relative to the first frequency point at a position of the first carrier frequency For example, if the frequency point configured by the base station to the carrier frequency fl of the first preamble sequence is the location where 100*2 of fl is located, the frequency points corresponding to each preamble sequence except the first preamble sequence are respectively f2, f3 , ..... , the position of the remainder of fn (100*2+100) / (200* 10e3) Set.

c) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence has a logical number with the preamble sequence at a position of the corresponding carrier frequency with respect to the first frequency point at the position of the first carrier frequency Related relative offset values;

2) The base station indicates, for each preamble sequence of the N preamble sequences, a frequency point on the carrier frequency corresponding to each preamble sequence. Exemplarily, the base station indicates a time period for the N preamble sequences. For example, in the LTE system, the base station indicates one or more subframes or one or more frames for the N preamble sequences. In the GSM system, the base station is randomly connected. A burst indicates one or more time slots or burst times or one or more frames. A random access method is provided by the embodiment of the present invention, the base station determines N time-frequency resources for transmitting the N preamble sequences, and each preamble sequence corresponds to one time-frequency resource, where The frequency resource includes a time domain resource and a frequency domain resource, and at least two of the frequency resources of the N time-frequency resources are different from each other; the base station sends the first configuration information to the user equipment, where the first configuration information is included Information indicating the N time-frequency resources. And causing the user equipment to send the N preamble sequences to the base station on the N time-frequency resources, requesting random access to the base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence. Moreover, 窄 narrowband transmission (corresponding to a carrier frequency with a bandwidth of 100 Hz), the bandwidth is reduced, the transmission power is kept constant, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing the coverage; The time is equal to an integer fraction of the duration of the data symbol, so that the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer, which is beneficial to improving the detection performance of the base station for the preamble sequence; Prevent inter-symbol interference due to timing inaccuracy; the pre-protection time can be set to avoid the performance of the preamble sequence being affected due to power climb and/or timing inaccuracy.

Referring to FIG. 4, a random access method according to an embodiment of the present invention includes:

401. The base station determines N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the N time-frequency resources. At least two of the frequency resources of the resources are different from each other;

402. The base station sends first configuration information to the user equipment, where the first configuration information includes information used to indicate the N time-frequency resources.

403. The user equipment determines, according to the first configuration information, N time-frequency resources used for transmitting the N preamble sequences.

404. The user equipment sends the N preamble sequences to the base station on the N time-frequency resources, requesting a random access base station.

Since the specific implementation process of each step described above has been described in the above implementation, it will not be described herein. A random access method is provided by the embodiment of the present invention, the base station determines N time-frequency resources for transmitting the N preamble sequences, each preamble sequence corresponds to one time-frequency resource, and the time-frequency resource includes a time-domain resource. And the frequency domain resource, the at least two of the frequency resources of the N time-frequency resources are different from each other; the base station sends the first configuration information to the user equipment, where the first configuration information includes Information about frequency resources. And causing the user equipment to send the N preamble sequences to the base station on the N time-frequency resources, requesting random access to the base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence. Referring to FIG. 5, a random access method according to an embodiment of the present invention includes:

501. The base station determines N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the N time-frequency resources At least two of the frequency resources of the resources are different from each other;

502. The base station sends the second configuration information to the user equipment, where the second configuration information includes format information of the N preamble sequences configured by the base station for the user equipment.

503. The user equipment determines, according to the second configuration information, N time-frequency resources used for transmitting the N preamble sequences.

504. The user equipment sends the N preamble sequences to the base station on the N time-frequency resources, requesting a random access base station.

Since the specific implementation process of each step described above has been described in the above implementation, it will not be described herein. A random access method is provided by the embodiment of the present invention, the base station determines N time-frequency resources for transmitting the N preamble sequences, each preamble sequence corresponds to one time-frequency resource, and the time-frequency resource includes a time-domain resource. And the frequency domain resource, the at least two of the frequency resources of the N time-frequency resources are different from each other; the base station sends the second configuration information to the user equipment, where the second configuration information includes the base station configured for the user equipment Format information of N preamble sequences. And causing the user equipment to send the N preamble sequences to the base station on the N time-frequency resources, requesting random access Base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence.

On the one hand, FIG. 6 is a user equipment 60, where the user equipment 60 performs a random access by using N preamble sequences, where N is an integer greater than or equal to 2, including:

The determining unit 601 is configured to determine N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time resource and a frequency resource, where the N time At least two of the frequency resources of the frequency resource are different from each other;

The determining unit 601 determines that the N time-frequency resources used to transmit the N preamble sequences may include two aspects:

(1) determining format information of the N preamble sequences, wherein the format information includes values of N, and sequences included in each preamble sequence.

(2) determining information of time-frequency resources of each of the N preamble sequences.

The duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol, and is equal to one of the integer fractions of the data symbol; For transferring data. Preferably, the duration of each preamble symbol is less than the duration of the data symbol and is equal to the integer value of the data symbol In one case, the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer, which is beneficial to improving the detection performance of the base station for the preamble sequence.

The details will be described below.

It should be noted that, for an LTE system, the frequency width of the carrier frequency may be referred to as a transmission bandwidth or a system bandwidth, and the bandwidth unit may be represented by a resource block (RB), for example, It can be 6 RB, and the frequency width of the narrowband frequency point can be less than 6 RB, such as 3 RB.

The sending unit 602 is configured to send, by using the N time-frequency resources, the N preamble sequences to the base station, to request random access to the base station.

Further, referring to FIG. 7, the user equipment 60 further includes:

The first receiving unit 603 is configured to receive first configuration information that is sent by the base station, where the first configuration information includes information used to indicate the N time-frequency resources;

Correspondingly, the determining unit 601 is specifically configured to determine, according to the first configuration information received by the first receiving unit, N time-frequency resources for transmitting the N preamble sequences.

Further, referring to FIG. 8, the user equipment 60 further includes: a second receiving unit 604, configured to receive second configuration information sent by the base station, where the second configuration information includes the base station configuring the user equipment Format information of N preamble sequences;

Correspondingly, the determining unit 601 is specifically configured to: determine, according to the second configuration information received by the second receiving unit, N time-frequency resources used for transmitting the N pre-sequences. A user equipment according to an embodiment of the present invention performs a random access by using N preamble sequences, where N is an integer greater than or equal to 2. Specifically, when the user equipment determines N used to transmit the N preamble sequences, a frequency resource, each preamble sequence corresponds to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least two of the frequency resources of the N time-frequency resources are different from each other; the user equipment is in the N time-frequency resources The N preamble sequences are sent to the base station for requesting random access to the base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence. Moreover, 窄 narrowband transmission (corresponding to a carrier frequency with a bandwidth of 100 Hz), the bandwidth is reduced, the transmission power is kept constant, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing the coverage; The time is equal to an integer fraction of the duration of the data symbol, so that the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer, which is beneficial to improving the detection performance of the base station for the preamble sequence; Prevent inter-symbol interference due to timing inaccuracy; the pre-protection time can be set to avoid the performance of the preamble sequence being affected due to power climb and/or timing inaccuracy. On the one hand, FIG. 9 is a user equipment 90, where the user equipment 90 performs a random access by using N preamble sequences, where N is an integer greater than or equal to 2, including:

The processor 901 is configured to determine N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time resource and a frequency resource, where the N times At least two of the frequency resources of the frequency resource are different from each other;

The processor 901 determines that the N time-frequency resources used for transmitting the N preamble sequences may specifically include two aspects:

Preferably, in order to prevent inter-symbol interference due to timing inaccuracy, in each time-frequency resource of the N time-frequency resources, the time resource includes a first time for transmitting a preamble sequence In addition to the inter-resource, a second time resource serving as a post-protection interval of the transmission preamble sequence is further included, and the first time resource is connected to the second time resource in time.

The details will be described below.

The transmitter 902 is configured to send, by using the N time-frequency resources, the N preamble sequences to the base station, to request random access to the base station.

Further, referring to FIG. 10, the user equipment 90 further includes: a receiver 903, configured to receive first configuration information that is sent by the base station, where the first configuration information includes information used to indicate the N time-frequency resources;

Correspondingly, the processor 901 is specifically configured to determine, according to the first configuration information received by the receiver 903, N time-frequency resources for transmitting the N preamble sequences.

Or, configured to receive second configuration information sent by the base station, where the second configuration information includes format information of N preamble sequences configured by the base station for the user equipment;

Correspondingly, the processor 901 is specifically configured to determine, according to the second configuration information received by the receiver 903, N time-frequency resources used for transmitting the N pre-sequences. A user equipment according to an embodiment of the present invention performs a random access by using N preamble sequences, where N is an integer greater than or equal to 2. Specifically, when the user equipment determines N used to transmit the N preamble sequences, a frequency resource, each preamble sequence corresponds to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least two of the frequency resources of the N time-frequency resources are different from each other; the user equipment is in the N time-frequency resources The N preamble sequences are sent to the base station for requesting random access to the base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence. Moreover, 窄 narrowband transmission (corresponding to a carrier frequency with a bandwidth of 100 Hz), the bandwidth is reduced, the transmission power is kept constant, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing the coverage; The time is equal to an integer fraction of the duration of the data symbol, so that the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer, which is beneficial to improving the detection performance of the base station for the preamble sequence; Prevent inter-symbol interference due to timing inaccuracy; the pre-protection time can be set to avoid the performance of the preamble sequence being affected due to power climb and/or timing inaccuracy.

In an aspect, the embodiment of the present invention provides a base station 110. Referring to FIG. 11, the base station 110 configures, for the user equipment, N time-frequency resources for transmitting N preamble sequences, where the N is an integer greater than or equal to 2, as shown in the figure. As shown, it can include: a determining unit 1101, configured to determine N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the N At least two of the frequency resources of the time-frequency resources are different from each other;

1. Format information of N preamble sequences, where the format information includes values of N and sequences included in each preamble sequence.

Preferably, in order to avoid that the performance of the preamble sequence is affected due to power climb and/or timing inaccuracy, in each time-frequency resource of the N time-frequency resources, the time resource includes a first part for transmitting a preamble sequence. a time resource, and a post-protection room used as a transmission preamble In addition to the second time resource, the third time resource used as the pre-protection time of the transmission preamble sequence is connected, and the third time resource, the first time resource and the second time resource are connected in time.

The details will be described below.

It should be noted that, for the LTE system, the frequency width of the carrier frequency may be referred to as a transmission bandwidth or a system bandwidth, and the bandwidth unit may be represented by a resource block (RB), for example, may be 6 RB, and the frequency bandwidth of the narrowband frequency point may be Less than 6RB, such as 3RB. For example, for narrowband transmission, the determining unit 1101 configures frequency points in a carrier frequency for the N preamble sequences, respectively, in the following two configuration methods:

1) The determining unit 1101 indicates, for the first preamble sequence of the N preamble sequences, a first frequency point on the first carrier frequency corresponding to the first preamble sequence, and respectively determines, among the N preamble sequences, except the first preamble sequence. The relationship between the frequency point corresponding to each preamble sequence and the first frequency point has the following relationships: a) the frequency corresponding to each preamble sequence of the N preamble sequences except the first preamble sequence The position of the corresponding carrier frequency is the same as the position of the first frequency point at the first carrier frequency; for example, the first carrier frequency may be fl, and the carrier frequency corresponding to each preamble sequence except the first preamble sequence may be F2, f3, ....., fn, if the determining unit 1101 allocates the frequency point of the carrier frequency fl of the first preamble sequence to the second frequency point of fl, then each preamble except the first preamble sequence The frequency points corresponding to the sequence are f2, f3, ....., the second frequency point of fn.

b) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence has a fixed relative offset value at a position of the corresponding carrier frequency relative to the first frequency point at a position of the first carrier frequency For example, if the frequency point at which the determining unit 1101 allocates the carrier frequency fl of the first preamble sequence is the location where 100*2 of fl is located, the frequency points corresponding to each preamble sequence except the first preamble sequence are respectively f2 , f3 , ..... , the position of the remainder of fn (100*2+100) / (200* 10e3). c) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence has a logical number with the preamble sequence at a position of the corresponding carrier frequency with respect to the first frequency point at the position of the first carrier frequency Related relative offset values;

For example, if the frequency point at which the determining unit 1101 allocates the carrier frequency fl of the first preamble sequence is the location where 100*2 of fl is located, the frequency point corresponding to the second preamble sequence is the carrier frequency f ² (100* ² + ( 2- 1 ) 100 ) /(200* 10e3) The position of the remainder obtained, the frequency point corresponding to the third preamble sequence is (100*2+( 3- 1 ) 100 ) /(200* 10e3) of carrier frequency f3 The position of the remainder obtained, ..., the frequency point corresponding to the nth preamble sequence is the position of the remainder of (100*2+ (3-1) 100) / (200*10e3) of the carrier frequency fn. d) The frequency point corresponding to each of the N preamble sequences except the first preamble sequence is at a random position of the corresponding carrier frequency. For example, the determining unit 1101 allocates a frequency point of the carrier frequency fl of the first preamble sequence to a second frequency point of fl, and determines, by the determining unit 1101, a frequency point corresponding to the second preamble sequence as the 136th frequency point of the carrier frequency f2. The frequency point corresponding to the third preamble sequence is a carrier The 1985th frequency point of the frequency f3, ..., the frequency point corresponding to the nth preamble sequence is the third frequency point of the carrier frequency fn. The frequency point corresponding to each of the N preamble sequences except the first preamble sequence is independent of the position of the first carrier frequency at the position of the corresponding carrier frequency and the first frequency point corresponding to the first preamble sequence.

2) The determining unit 1101 indicates, for each of the N preamble sequences, a frequency point on the carrier frequency corresponding to each preamble sequence. Exemplarily, the determining unit 1101 indicates a time period for the N preamble sequences. For example, in the LTE system, the determining unit 1101 indicates one or more subframes or one or more frames for the N preamble sequences. In the GSM system, The determining unit 1101 indicates one or more time slots or burst times or one or more frames for a random access burst (burst).

The sending unit 1102 is configured to send first configuration information to the user equipment, where the first configuration information includes information used to indicate the N time-frequency resources.

The user equipment determines the format information of the N preamble sequences in a predefined manner, and the information of the time-frequency resources of each of the N preamble sequences is configured by the base station. The information of the N time-frequency resources indicated by the first configuration information may include: the base station configures one of the carrier frequencies for the N preamble sequences. A base station is configured to determine N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource. At least two of the frequency resources of the N time-frequency resources are different from each other; the base station sends the first configuration information to the user equipment, where the first configuration information includes information for indicating the N time-frequency resources. . And causing the user equipment to send the N preamble sequences to the base station on the N time-frequency resources, requesting random access to the base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence. Moreover, 窄 narrowband transmission (corresponding to a carrier frequency with a bandwidth of 100 Hz), the bandwidth is reduced, the transmission power is kept constant, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing the coverage; Time equals According to the integer fraction of the symbol duration, the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer, which is beneficial to improving the detection performance of the base station for the preamble sequence; the setting of the post-protection time can prevent Timing is not allowed to cause intersymbol interference; the pre-protection time is set to avoid the performance of the preamble sequence being affected due to power climb and/or timing inaccuracy.

In an aspect, the embodiment of the present invention provides a base station 120. Referring to FIG. 12, the base station 120 configures, for the user equipment, N time-frequency resources for transmitting N preamble sequences, where the N is an integer greater than or equal to 2, as shown in the figure. As shown, it can include:

The processor 1201 is configured to determine N time-frequency resources for transmitting the N preamble sequences, where each preamble sequence corresponds to one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the N At least two of the frequency resources of the time-frequency resources are different from each other;

The information of the time-frequency resource of each preamble sequence includes the information of the time domain resource of the preamble sequence and the information of the frequency domain resource resource, where the time domain resource includes a first time resource for transmitting the preamble sequence, where The first time resource for transmitting the preamble sequence is at least one preamble symbol. For example, a preamble sequence includes L preamble symbols, and each preamble symbol has a duration of Τρ, and the duration of the first time resource of the preamble sequence is L*Tp.

窄 Narrowband transmission (corresponding to a carrier frequency of 100 Hz), because the bandwidth is reduced, the transmission power remains unchanged, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing coverage.

It should be noted that, for the LTE system, the frequency width of the carrier frequency may be referred to as a transmission bandwidth or a system bandwidth, and the bandwidth unit may be represented by a resource block (RB), for example, may be 6 RB, and the frequency bandwidth of the narrowband frequency point may be Less than 6RB, such as 3RB. For example, for narrowband transmission, the processor 1201 configures frequency points in a carrier frequency for each of the N preamble sequences, in the following two configuration methods:

1) The processor 1201 indicates, for the first preamble sequence of the N preamble sequences, a first frequency point on the first carrier frequency corresponding to the first preamble sequence, and respectively determines, among the N preamble sequences, except the first preamble sequence. The relationship between the frequency point corresponding to each preamble sequence and the first frequency point has the following relationships: a) the frequency corresponding to each preamble sequence of the N preamble sequences except the first preamble sequence The position of the corresponding carrier frequency is the same as the position of the first frequency point at the first carrier frequency; for example, the first carrier frequency may be fl, and the carrier frequency corresponding to each preamble sequence except the first preamble sequence may be F2, f3, ....., fn, if the frequency point at which the processor 1201 configures the carrier frequency fl of the first preamble sequence is the second frequency point of fl, then each preamble except the first preamble sequence The frequency points corresponding to the sequence are f2, f3, ....., the second frequency point of fn.

b) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence has a fixed relative offset value at a position of the corresponding carrier frequency relative to the first frequency point at a position of the first carrier frequency For example, if the frequency point configured by the processor 1201 for the carrier frequency fl of the first preamble sequence is the location where 100*2 of fl is located, the frequency points corresponding to each preamble sequence except the first preamble sequence are respectively f2 , f3 , ..... , the position of the remainder of fn (100*2+100) / (200* 10e3). c) a frequency point corresponding to each of the N preamble sequences except the first preamble sequence has a logical number with the preamble sequence at a position of the corresponding carrier frequency with respect to the first frequency point at the position of the first carrier frequency Related relative offset values;

For example, if the frequency point configured by the processor 1201 for the carrier frequency fl of the first preamble sequence is the location where 100*2 of fl is located, the frequency point corresponding to the second preamble sequence is the carrier frequency f 2 (100*2+). ( 2- 1 ) 100 ) /(200* 10e3) The position of the remainder obtained, the frequency point corresponding to the third preamble sequence is (100*2+ ( 3- 1 ) 100 ) / (200* 10e3) of carrier frequency f3 The position of the remainder obtained, ..., the frequency point corresponding to the nth preamble sequence is the position of the remainder of (100*2+ (3-1) 100) / (200*10e3) of the carrier frequency fn. d) The frequency point corresponding to each of the N preamble sequences except the first preamble sequence is at a random position of the corresponding carrier frequency. For example, the processor 1201 allocates a frequency point of the carrier frequency fl of the first preamble sequence to a second frequency point of fl, and the frequency point corresponding to the second preamble sequence by the processor 1201 is the 136th frequency point of the carrier frequency f2. The frequency point corresponding to the third preamble sequence is the carrier frequency f3 The 1985th frequency point, ..., the frequency point corresponding to the nth preamble sequence is the third frequency point of the carrier frequency fn. The frequency point corresponding to each of the N preamble sequences except the first preamble sequence is independent of the position of the first carrier frequency at the position of the corresponding carrier frequency and the first frequency point corresponding to the first preamble sequence.

2) The processor 1201 indicates, for each of the N preamble sequences, a frequency point on a carrier frequency corresponding to each preamble sequence. Exemplarily, the processor 1201 indicates a time period for the N preamble sequences. For example, in the LTE system, the processor 1201 indicates one or more subframes or one or more frames for the N preamble sequences. In the GSM system, The processor 1201 indicates one or more time slots or burst times or one or more frames for a random access burst.

The sender 1202 is configured to send first configuration information to the user equipment, where the first configuration information includes information used to indicate the N time-frequency resources.

In one aspect, the embodiment of the present invention provides a system for random access, and FIG. 13 includes the user equipment in any of the foregoing embodiments and the base station in any of the foregoing embodiments. The specific functions of the user equipment and the base station have been described in the foregoing embodiments, and therefore are not described herein again. A random access system is provided by the embodiment of the present invention. The user equipment performs a random access by using N preamble sequences, where the N is an integer greater than or equal to 2. Specifically, the user equipment determines to transmit the N preambles. The N time-frequency resources of the sequence, each of the preamble sequences corresponds to one time-frequency resource, the time-frequency resource includes a time resource and a frequency resource, and at least two of the frequency resources of the N time-frequency resources are different from each other; The N preamble sequences are sent to the base station on the N time-frequency resources for requesting random access to the base station. The probability that multiple frequency resources are located in the frequency range of the deep fading is small, thereby reducing the probability of the base station detecting errors of the preamble sequence, and overcoming the prior art user equipment to perform random access on a preamble sequence, and the preamble sequence When the same frequency resource is used, when the frequency resource is in the frequency range of deep fading, the base station detects the error of the preamble sequence. Moreover, 窄 narrowband transmission (corresponding to a carrier frequency with a bandwidth of 100 Hz), the bandwidth is reduced, the transmission power is kept constant, and the noise power in the narrowband is reduced, thereby improving the signal-to-noise ratio and enhancing the coverage; The time is equal to an integer fraction of the duration of the data symbol, so that the same time domain resource can be used to transmit more preamble symbols, and the length of the preamble sequence is longer, which is beneficial to improving the detection performance of the base station for the preamble sequence; Prevent inter-symbol interference due to timing inaccuracy; the pre-protection time can be set to avoid the performance of the preamble sequence being affected due to power climb and/or timing inaccuracy. It should be noted that the primary random access described in the embodiment of the present invention may be a user setting. When the N preamble sequences are to be sent, or when the N preamble sequences are transmitted according to the preamble format corresponding to the N preamble sequences, the response from the base station side is not received or received, such as a random access device, preferably, may be M2M terminal. M2M terminals, such as smart meters, are deployed in deep occlusions in certain application scenarios. In particular, enhanced coverage is required, and enhanced coverage can be achieved to improve the random access success rate.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional units are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform some of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and the like can store program codes. Medium.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A random access method, characterized in that the user equipment uses N preamble sequences to perform a random access, and the N is an integer greater than or equal to 2. The method includes:

The user equipment determines N time-frequency resources for transmitting the N preamble sequences. Each preamble sequence corresponds to a time-frequency resource. The time-frequency resources include time resources and frequency resources. The N time-frequency resources At least 2 of the frequency resources are different from each other;

The user equipment sends the N preamble sequences to the base station on the N time-frequency resources to request random access to the base station.

2. The method according to claim 1, characterized in that the user equipment determines N time-frequency resources used to transmit the N preamble sequences, including:

The user equipment receives first configuration information sent by the base station, where the first configuration information includes information indicating the N time-frequency resources;

The user equipment determines N time-frequency resources for transmitting the N preamble sequences according to the first configuration information.

3. The method according to claim 1, wherein the user equipment determines N time-frequency resources used to transmit the N preamble sequences, including:

The user equipment receives the second configuration information sent by the base station, and the second configuration information includes format information of N preamble sequences configured by the base station for the user equipment;

The user equipment determines N time-frequency resources used to transmit the N preamble sequences according to the second configuration information.

4. The method according to any one of claims 1 to 3, characterized in that, in each of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by a base station, and the narrowband The frequency point is a part of the carrier frequency configured by the base station, and the frequency width of the narrowband frequency point is smaller than the frequency width of the carrier frequency.

5. The method according to any one of claims 1 to 4, characterized in that, in each of the N time-frequency resources, the time resource includes a first time resource used to transmit a preamble sequence. , and a second time resource used as a post-guard interval for transmitting the preamble sequence, where the first time resource and the second time resource are consecutively connected in time.

6. The method according to claim 5, characterized in that: the preamble for transmitting The first time resource of the column is at least one leading symbol;

Wherein, the duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol and equal to an integer fraction of the data symbol; the data symbol is used for transmitting data.

7. The method according to any one of claims 1 to 6, characterized in that the N leading sequences are the same sequence.

8. A random access configuration method, characterized in that the base station configures N time-frequency resources for transmitting N preamble sequences for the user equipment, where N is an integer greater than or equal to 2, including:

The base station determines N time-frequency resources for transmitting the N preamble sequences. Each preamble sequence corresponds to a time-frequency resource. The time-frequency resources include time-domain resources and frequency-domain resources. The N time-frequency resources At least 2 of the frequency resources of the resource are different from each other;

The base station sends first configuration information to the user equipment, where the first configuration information includes information indicating the N time-frequency resources.

9. The method according to claim 8, characterized in that, in each of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by a base station, and the narrowband frequency point is the A part of the carrier frequencies configured by the base station, and the frequency width of the narrowband frequency point is smaller than the frequency width of the carrier frequency.

10. The method according to claim 8 or 9, characterized in that, in each of the N time-frequency resources, the time resource includes a first time resource used to transmit a preamble sequence, and The second time resource is used as a post-guard interval for transmitting the preamble sequence, and the first time resource and the second time resource are consecutively connected in time.

11. The method according to claim 10, characterized in that the first time resource used to transmit the preamble sequence is at least one preamble symbol;

Wherein, the duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol and equal to an integer fraction of the data symbol; the data symbol is used for Transmit data other than the preamble sequence.

12. A user equipment, characterized in that, the user equipment uses N preamble sequences to perform a random access, where N is an integer greater than or equal to 2, and the user equipment includes: Determining unit, used to determine N time-frequency resources used to transmit the N preamble sequences, each preamble sequence corresponds to a time-frequency resource, the time-frequency resources include time resources and frequency resources, the N time-frequency resources At least 2 of the frequency resources of the resource are different from each other;

A sending unit, configured to send the N preamble sequences to the base station on the N time-frequency resources, and used to request random access to the base station.

13. The user equipment according to claim 12, characterized in that, the user equipment further includes:

The first receiving unit is configured to receive the first configuration information sent by the base station, where the first configuration information includes information indicating the N time-frequency resources;

The determining unit is specifically configured to determine N time-frequency resources for transmitting the N preamble sequences according to the first configuration information received by the first receiving unit.

14. The user equipment according to claim 12, characterized in that, the user equipment further includes:

The second receiving unit is configured to receive the second configuration information sent by the base station, where the second configuration information includes the format information of N preamble sequences configured by the base station for the user equipment; the determining unit is specifically configured to: , determine N time-frequency resources used to transmit the N preambles according to the second configuration information received by the second receiving unit.

15. The user equipment according to any one of claims 12 to 14, characterized in that, in each of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by a base station, The narrowband frequency point is a part of the carrier frequency configured by the base station, and the frequency width of the narrowband frequency point is smaller than the frequency width of the carrier frequency.

16. The user equipment according to any one of claims 12 to 15, characterized in that, in each of the N time-frequency resources, the time resource includes a first time for transmitting a preamble sequence. resources, and a second time resource used as a post-guard interval for transmitting a preamble sequence, where the first time resource and the second time resource are consecutively connected in time.

17. The user equipment according to claim 16, wherein the first time resource used to transmit the preamble sequence is at least one preamble symbol;

Wherein, the duration of each preamble symbol is equal to the duration of the data symbol; or, the duration of each preamble symbol is less than the duration of the data symbol and equal to the duration of the data symbol. One integer; The data symbols are used to transmit data.

18. The user equipment according to any one of claims 12 to 17, characterized in that the N preamble sequences are the same sequence.

19. A base station, characterized in that the base station configures N time-frequency resources for transmitting N preamble sequences for user equipment, where N is an integer greater than or equal to 2, and the base station includes:

Determining unit, configured to determine N time-frequency resources used to transmit the N preamble sequences, each preamble sequence corresponds to a time-frequency resource, the time-frequency resources include time domain resources and frequency domain resources, the N At least two of the frequency resources of the time-frequency resource are different from each other;

A sending unit, configured to send first configuration information to the user equipment, where the first configuration information includes information indicating the N time-frequency resources.

20. The base station according to claim 19, characterized in that, in each of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by the base station, and the narrowband frequency point is the A part of the carrier frequencies configured by the base station, and the frequency width of the narrowband frequency point is smaller than the frequency width of the carrier frequency.

21. The base station according to claim 19 or 20, characterized in that, in each of the N time-frequency resources, the time resource includes a first time resource used to transmit a preamble sequence, and The second time resource is used as a post-guard interval for transmitting the preamble sequence, and the first time resource and the second time resource are consecutively connected in time.

22. The base station according to claim 21, wherein the first time resource used to transmit the preamble sequence is at least one preamble symbol;

23. A user equipment, characterized in that the user equipment uses N preamble sequences to perform a random access, and the N is an integer greater than or equal to 2. The user equipment includes: a processor, used to determine the user equipment. For transmitting the N time-frequency resources of the N preamble sequences, each preamble sequence corresponds to a time-frequency resource, the time-frequency resources include time resources and frequency resources, and at least 2 of the frequency resources of the N time-frequency resources are different from each other; A transmitter, configured to send the N preamble sequences to the base station on the N time-frequency resources, and used to request random access to the base station.

24. The user equipment according to claim 23, characterized in that, the user equipment further includes:

A receiver, configured to receive the first configuration information sent by the base station, where the first configuration information includes information indicating the N time-frequency resources;

The processor is specifically configured to determine N time-frequency resources used to transmit the N preamble sequences according to the first configuration information received by the receiver.

25. The user equipment according to claim 23, characterized in that, the user equipment further includes:

The processor is specifically configured to determine N time-frequency resources for transmitting the N preamble sequences according to the second configuration information received by the receiver.

26. The user equipment according to any one of claims 23 to 25, characterized in that, in each of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by a base station, The narrowband frequency point is a part of the carrier frequency configured by the base station, and the frequency width of the narrowband frequency point is smaller than the frequency width of the carrier frequency.

27. The user equipment according to any one of claims 23 to 26, characterized in that, in each of the N time-frequency resources, the time resource includes a first time for transmitting a preamble sequence. resources, and a second time resource used as a post-guard interval for transmitting a preamble sequence, where the first time resource and the second time resource are consecutively connected in time.

28. The user equipment according to claim 27, wherein the first time resource used to transmit the preamble sequence is at least one preamble symbol;

29. The user equipment according to any one of claims 23 to 28, characterized in that the N preamble sequences are the same sequence.

30. A base station, characterized in that the base station configures N time-frequency resources for transmitting N preamble sequences for user equipment, where N is an integer greater than or equal to 2, and the base station includes:

A processor, configured to determine N time-frequency resources for transmitting the N preamble sequences. Each preamble sequence corresponds to a time-frequency resource. The time-frequency resources include time domain resources and frequency domain resources. The N At least two of the frequency resources of the time-frequency resource are different from each other;

A transmitter, configured to send first configuration information to the user equipment, where the first configuration information includes information indicating the N time-frequency resources.

31. The base station according to claim 30, characterized in that, in each of the N time-frequency resources, the frequency resource is a narrowband frequency point configured by the base station, and the narrowband frequency point is the A part of the carrier frequencies configured by the base station, and the frequency width of the narrowband frequency point is smaller than the frequency width of the carrier frequency.

32. The base station according to claim 30 or 31, characterized in that, in each of the N time-frequency resources, the time resource includes a first time resource used to transmit a preamble sequence, and The second time resource is used as a post-guard interval for transmitting the preamble sequence, and the first time resource and the second time resource are consecutively connected in time.

33. The base station according to claim 32, wherein the first time resource used to transmit the preamble sequence is at least one preamble symbol;

34. A random access system, characterized by comprising the user equipment according to any one of claims 12-18 and 23-29 and the user equipment according to any one of claims 19-22 and 30-33. base station.