CN108810995A

CN108810995A - Communication means, the network equipment and user equipment

Info

Publication number: CN108810995A
Application number: CN201710299259.4A
Authority: CN
Inventors: 李俊超; 唐浩; 汪凡; 唐臻飞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2018-11-13
Anticipated expiration: 2037-04-28
Also published as: WO2018196866A1; CN108810995B

Abstract

This application provides a kind of communication means, the network equipment and user equipment, this method includes：The network equipment determines the specific search space resources of UE according to the maximum bandwidth and public search space resource of user equipment (UE)；The network equipment sends configuration information to the UE, and the configuration information is used to indicate the specific search space resources of the UE.In the application, by being that UE configures the specific search space resources of UE according to the maximum bandwidth and public search space resource of UE so that UE can monitor public search space and the specific search spaces UE simultaneously.

Description

Communication method, network equipment and user equipment

Technical Field

The present application relates to the field of communications, and more particularly, to a communication method, a network device, and a user equipment.

Background

In Long Term Evolution (LTE), common search space resources are predefined, and User Equipment (UE) -specific search space resources are predefined or configured based on the network side. Since the minimum UE bandwidth capability in a cell in LTE is not less than the system bandwidth, i.e. the working bandwidth of the UE is the system bandwidth, all UEs can monitor the common search space and the UE-specific search space at the same time.

In a 5th Generation (5G) New air interface (NR), the system bandwidth is different from that in the LTE system, and if the UE-specific search space is predefined or configured along with the existing scheme, it may result in that the UE cannot monitor the common search space and the UE-specific search space at the same time.

Disclosure of Invention

The application provides a communication method, network equipment and user equipment, so that UE can monitor a public search space and a UE-specific search space simultaneously.

In a first aspect, a communication method is provided, the method including:

the network equipment determines the specific search space resource of the UE according to the maximum bandwidth of the UE and the public search space resource;

the network equipment sends configuration information to the UE, wherein the configuration information is used for indicating the UE specific search space resource.

Wherein, the common search space resource and the UE specific search space resource both refer to frequency domain resources.

Optionally, the configuration parameters corresponding to the common search space resources are the same as the configuration parameters corresponding to the UE-specific search space resources. The configuration parameter may include at least one of parameters such as subcarrier spacing size, cyclic prefix length, transmission time unit length, symbol length, and number of symbols in the transmission time unit. It should be understood that the configuration parameters may also be referred to as a system parameter set or other names, which are not limited by the embodiment of the present invention.

It should be noted that the maximum bandwidth of the UE is less than or equal to the maximum bandwidth that the UE can support. In other words, here, the maximum bandwidth of a UE is the maximum bandwidth that the UE or the base station expects the UE to support, and the maximum bandwidth that the UE can support is the maximum bandwidth that the UE can theoretically provide (also referred to as UE maximum bandwidth capability). For example, the maximum bandwidth that the UE can support is equal to the minimum value between the radio frequency transmission bandwidth and the baseband processing bandwidth, that is, the maximum bandwidth capability of the UE is min (radio frequency bandwidth capability, baseband processing capability), where min () represents the minimum value in ().

The UE can simultaneously monitor the public search space and the UE-specific search space by configuring the UE with the UE-specific search space resources according to the maximum bandwidth of the UE and the public search space resources.

And the UE adopts the public search space to detect the public downlink control information and/or the UE specific downlink control information, and adopts the UE specific search space to detect the UE specific downlink control information.

The common downlink control information is downlink control information scrambled by a common Radio Network Temporary Identity (RNTI). The common RNTI is a common parameter which is predefined or configured by Network equipment to all or a group of UEs in a cell, and comprises a system message Radio Network Temporary identifier (SI-RNTI), a Paging Radio Network Temporary identifier (P-RNTI), a Random Access Radio Network Temporary identifier (RA-RNTI) and the like.

The UE-specific downlink control information is downlink control information scrambled by a UE-specific Radio Network Temporary Identity (RNTI). The UE-specific RNTI is a parameter which is configured by the Network equipment to the specific UE in the Cell and comprises a Cell Radio Network Temporary identifier (C-RNTI), a Temporary C-RNTI (Temporary C-RNTI), a Semi-Persistent Scheduling C-RNTI (SPS C-RNTI) and the like.

Alternatively, the common search space resource may be configured through a Master Information Block (MIB) or implicitly indicated by initial access information. The initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, where the Synchronization Signal block may include a Primary SS and/or a Secondary SS, and may further include a MIB.

Alternatively, one or more candidate resources of the common search space resource may also be implicitly indicated by the initial access information (e.g., time-frequency resources of a synchronization signal block), and then one of the one or more candidate resources may be indicated as the common search space resource through the MIB.

Optionally, the network device sends configuration information to the UE, including:

the network device sends Radio Resource Control (RRC) signaling to the UE, where the RRC signaling includes the configuration information. That is, the network device may configure the UE-specific search space resources for the UE through RRC signaling.

In some possible implementations, a total bandwidth of the UE-specific search space resources and the common search space resources in a frequency domain is less than or equal to a maximum bandwidth of the UE.

It should be understood that the total bandwidth of the UE-specific search space resources and the common search space resources in the frequency domain refers to: a bandwidth of the UE-specific search space resource in a frequency domain, a bandwidth of the common search space resource in the frequency domain, and an interval bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain.

For example, the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain refers to: a number of RBs between a highest Resource Block (RB) of the UE-specific search space Resource and a lowest RB of the common search space Resource, or a number of RBs between a highest RB of the common search space Resource and a lowest RB of the UE-specific search space Resource.

In some possible implementations, the sequence number of the center RB of the UE-specific search space resource and the sequence number of the lowest RB of the common search space resource satisfy the following relationship:

wherein,a sequence number of a lowest RB of the common search space resources,a sequence number of a center RB of the UE specific search space resource, W is a number of RBs corresponding to a transmission bandwidth of the common search space resource in a frequency domain, v is a number of RBs of the transmission bandwidth of the UE specific search space resource in the frequency domain, W is a number of RBs corresponding to a maximum bandwidth of the UE, v is less than or equal to W, and when v is an even number, the center RB of the UE specific search space resource is a v/2+1 th RB of the RBs corresponding to the transmission bandwidth of the UE specific search space resource in the frequency domain.

w, v may be configured or predefined,may be predefined or configured via the MIB.

Alternatively, if v is an even number and the center RB of the UE-specific search space resource is the v/2 th RB among RBs corresponding to the transmission bandwidth in the frequency domain, the sequence number of the lowest RB of the common search space resource and the sequence number of the center RB of the UE-specific search space resource satisfy the following relation:

optionally, the sequence number of the lowest RB of the UE-specific search space resourcesA sequence number of a lowest RB from the common search space resourceSatisfies the following relation:

optionally, a sequence number of a highest RB of the UE-specific search space resourcesA sequence number of a lowest RB from the common search space resourceSatisfies the following relation:

the relevant parameters in the relations (2), (3) and (4) can refer to the relevant description of the relation (1), and are not described herein again.

In some possible implementations, the common search space resource is a subset of the UE-specific search space resources. This configuration ensures that UEs with different maximum bandwidths can monitor both the common search space and the UE-specific search space simultaneously.

In some possible implementations, the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of maximum bandwidths of a plurality of UEs within a cell. For example, the bandwidth of the common search space resource in the frequency domain is less than or equal to the minimum of the maximum bandwidths of all UEs or a group of UEs in the cell. This ensures that the UEs within the cell are able to monitor the common search space resources.

In some possible implementations, before the network device determines the UE-specific search space resources configured for the user equipment UE according to the maximum bandwidth of the UE and the common search space resources, the method further includes:

and the network equipment receives indication information reported by the UE, wherein the indication information is used for indicating the maximum bandwidth of the UE.

In some possible implementations, the common search space resource includes a synchronization signal block, and a sequence number of a center RB of the common search space resource and a sequence number of a lowest RB of the synchronization signal block satisfy the following relation:

wherein,is the sequence number of the lowest RB of the synchronization signal block,a sequence number, W, of a center RB of the common search space resource_minThe number of RBs corresponding to the minimum value in the maximum bandwidths of a plurality of UEs in a cell, w is the number of RBs corresponding to the transmission bandwidth of the public search space resource in the frequency domain, m is the number of RBs of the synchronization signal block, and w is less than or equal toW_minAnd when w is an even number, the center RB of the common search space resource is the w/2+1 th RB of RBs to which the transmission bandwidth of the common search space resource in the frequency domain corresponds. w may be configured or predefined, m andmay be predefined.

In this way, it can be ensured that the UE can monitor the common search space and the synchronization signal block simultaneously.

Optionally, if w is an even number and the central RB of the common search space resource is the w/2 th RB of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, the sequence number of the central RB of the common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relation:

optionally, a sequence number of a lowest RB of the common search space resourcesSequence number of lowest RB with the synchronization signal blockSatisfies the following relation:

optionally, a sequence number of a highest RB of the common search space resourceSequence number of lowest RB with the synchronization signal blockSatisfies the following relation:

the relevant parameters in the relations (6), (7) and (8) can refer to the relevant description of the relation (5), and are not described herein again.

In a second aspect, a communication method is provided, the method comprising:

user Equipment (UE) receives configuration information sent by network equipment, wherein the configuration information is used for indicating UE specific search space resources configured for the UE, and the UE specific search space resources are determined according to the maximum bandwidth of the UE and common search space resources;

and the UE detects the UE specific downlink control information by adopting the UE specific search space resource according to the configuration information.

The UE can simultaneously monitor the public search space and the UE-specific search space according to the UE-specific search space resources configured on the network side.

The transmission time unit may be a time unit such as a timeslot, timeslot aggregation, minislot or minislot aggregation, and the embodiment of the present invention is not limited thereto.

wherein,a sequence number of a lowest RB of the common search space resources,a serial number of a center RB of the UE-specific search space resource, W is a number of RBs corresponding to a transmission bandwidth of the common search space resource in a frequency domain, v is a number of RBs corresponding to a transmission bandwidth of the UE-specific search space resource in a frequency domain, W is a number of RBs corresponding to a maximum bandwidth of the UE, v is less than or equal to W, and when v is an even number, the center RB of the UE-specific search space resource is a v/2+1 th RB of the RBs corresponding to the transmission bandwidth of the UE-specific search space resource in the frequency domain.

Optionally, if v is an even number and the center RB of the UE-specific search space resource is the v/2 th RB of RBs corresponding to the transmission bandwidth of the UE-specific search space resource in the frequency domain, the sequence number of the lowest RB of the common search space resource and the sequence number of the center RB of the UE-specific search space resource satisfy the following relation:

optionally, a sequence number of a lowest RB of the common search space resourcesA sequence number of a lowest RB with the UE-specific search space resourceSatisfies the following relation:

optionally, a sequence number of a lowest RB of the common search space resourcesA sequence number of a highest RB with the UE-specific search space resourceSatisfies the following relation:

In some possible implementations, the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of maximum bandwidths of a plurality of UEs within a cell. For example, the bandwidth of the common search space resource in the frequency domain is less than or equal to the minimum of the maximum bandwidths of all UEs or a group of UEs in the cell. This ensures that all of these UEs within the cell can monitor the common search space resources.

In some possible implementations, the method further includes:

and the UE sends indication information to the network equipment, wherein the indication information is used for indicating the maximum bandwidth of the UE.

wherein,is the sequence number of the lowest RB of the synchronization signal block,a sequence number, W, of a center RB of the common search space resource_minThe number of RBs corresponding to the minimum value in the maximum bandwidths of a plurality of UEs in a cell, W is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, m is the number of RBs of the synchronization signal block, and W is not more than W_minAnd when w is an even number, the center RB of the common search space resource is the w/2+1 th RB of RBs to which the transmission bandwidth of the common search space resource in the frequency domain corresponds. w may be configured or predefined, m andmay be predefined.

In a third aspect, a communication method is provided, the method including:

if the total bandwidth of the UE specific search space resource and the public search space resource in the frequency domain is larger than the maximum bandwidth of the UE, the UE does not monitor the public search space resource and the UE specific search space resource at the same time; or,

if the configuration parameters corresponding to the UE specific search space resource and the common search space resource are different and the UE does not support the parallel transmission of the multiple configuration parameters, the UE does not monitor the common search space resource and the UE specific search space resource simultaneously.

The embodiment of the invention is suitable for a scene of large-bandwidth or multi-configuration parameter parallel transmission, can support UE (user equipment) blind detection common downlink control information and UE specific downlink control information with different capabilities, and is beneficial to reducing the number of times of UE blind detection with different capabilities.

The common downlink control information is downlink control information scrambled by a common Radio Network Temporary Identity (RNTI). The common RNTI includes a System Information Radio Network Temporary Identifier (SI-RNTI), a Paging Radio Network Temporary Identifier (P-RNTI), a Random Access Radio Network Temporary Identifier (RA-RNTI), and the like.

The UE-specific downlink control information is downlink control information scrambled by a UE-specific Radio Network Temporary Identity (RNTI). The UE-specific RNTI comprises a Cell Radio Network Temporary Identifier (C-RNTI), a Temporary C-RNTI (Temporary C-RNTI), a Semi-Persistent Scheduling C-RNTI (SPSC-RNTI) and the like.

Optionally, the configuration parameters corresponding to the common search space resource may be predefined or indicated by the MIB.

Optionally, the UE-specific search space resource may be configured through Radio Resource Control (RRC) signaling, and the configuration parameter corresponding to the UE-specific search space resource may also be configured through RRC signaling.

The configuration parameter may include at least one of parameters such as subcarrier spacing size, cyclic prefix length, transmission time unit length, symbol length, and number of symbols in the transmission time unit. It should be understood that the configuration parameters may also be referred to as a system parameter set or other names, which are not limited by the embodiment of the present invention.

In some possible implementations, the UE does not monitor the common search space resource and the UE-specific search space resource simultaneously, including:

the UE detects first UE specific downlink control information and common downlink control information by using the common search space resource in a first transmission time unit, and detects second UE specific downlink control information by using the UE specific search space resource in a second transmission time unit;

or,

the UE detects the UE specific downlink control information by using the UE specific search space resource in a transmission time unit, and only detects the common downlink control information by using the common search space resource in a second transmission time unit;

wherein the first transmission time unit is different from the second transmission time unit.

The embodiment of the present invention does not limit the time sequence of the first transmission time unit and the second transmission time unit.

The first UE-specific downlink control information and the second UE-specific downlink control information may be the same or different, which is not limited in this embodiment of the present invention.

In some possible implementations, the method further includes:

and the UE reports indication information to network equipment, wherein the indication information is used for indicating the maximum bandwidth of the UE and/or whether the UE supports multi-configuration parameter parallel transmission.

For example, the UE may send the indication information through a preamble sequence or a random access message 3(Msg 3).

In a fourth aspect, a method of communication is provided, the method comprising:

if the total bandwidth of the UE-specific search space resource and the public search space resource in the frequency domain is greater than the maximum bandwidth of the UE, the network equipment sends first UE-specific downlink control information and public downlink control information by using the public search space resource in a first transmission time unit, and sends second public downlink control information by using the UE-specific search space resource in a second transmission time unit, or the network equipment sends the UE-specific downlink control information by using the UE-specific search space resource in the first transmission time unit, and sends the public downlink control information by using the public search space resource in the second transmission time unit, wherein the first transmission time unit is different from the second transmission time unit;

or,

if the configuration parameters corresponding to the UE specific search space resource and the common search space resource are different, and the UE does not support multi-configuration-parameter parallel transmission, the network equipment sends first UE specific downlink control information and common downlink control information by using the common search space resource in a first transmission time unit, and sends second common downlink control information by using the UE specific search space resource in a second transmission time unit, or the network equipment sends the UE specific downlink control information by using the UE specific search space resource in the first transmission time unit, and sends the common downlink control information by using the common search space resource in the second transmission time unit;

The first UE-specific downlink control information and the second UE-specific downlink control information may be the same or different, and this is not limited in this embodiment of the present invention.

In some possible implementations, the method further includes:

and the network equipment receives indication information reported by the UE, wherein the indication information is used for indicating the maximum bandwidth of the UE and/or whether the UE supports multi-configuration parameter parallel transmission.

In a fifth aspect, a communication method is provided, the method comprising:

if the total bandwidth of a first public search space resource and a second public search space resource on a frequency domain is greater than the maximum bandwidth of the UE, the UE detects first public downlink control information and second public downlink control information by using the first public search space resource on a transmission time unit for transmitting a system message in a Random Access Response (RAR) time window, and detects the second public downlink control information by using the second public search resource on a transmission time unit for not transmitting the system message in the RAR time window; or,

if the total bandwidth of a first public search space resource and a second public search space resource in a frequency domain is less than or equal to the maximum bandwidth of the UE, the configuration parameters corresponding to the first public search space resource and the second public search space resource are different, and the UE does not support multi-configuration-parameter parallel transmission, the UE detects the first public downlink control information and the second public downlink control information by using the first public search space resource on a transmission time unit for transmitting system messages in an RAR time window, and detects the second public downlink control information by using the second public search space resource on a transmission time unit for not transmitting system messages in the RAR time window; or,

if the bandwidth of a first public search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, the bandwidth of a second public search space resource in the frequency domain is greater than the maximum bandwidth of the UE, or the configuration parameters corresponding to the first public search space resource and the second public search space resource are different and the UE does not support the configuration parameters corresponding to the second public search space resource, the UE only uses the first public search space resource to detect the first public downlink control information and the second public downlink control information; or,

in other cases, the UE detects first common downlink control information using the first common search space resource, and detects second common downlink control information using the second common search space resource.

The other cases include: the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE.

The first common downlink control information includes downlink control information for scheduling a system message, and the second common downlink control information includes downlink control information for scheduling the UE RAR.

The first common search space resource is used for transmitting first common downlink control information and/or second common downlink control information, and the second common search space resource is used for transmitting second common downlink control information.

The embodiment of the invention is suitable for a scene of large bandwidth or multi-configuration parameter parallel transmission, and can support UE with different capabilities to blindly detect the common downlink control information.

Optionally, the first common search space resource may be configured through the MIB or implicitly indicated by initial access information. The initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, where the Synchronization Signal block may include a Primary SS and/or a Secondary SS, and may further include a MIB.

Optionally, one or more candidate resources of the first common search space resource may also be implicitly indicated by the initial access information (e.g., time-frequency resources of a synchronization signal block), and then one of the one or more candidate resources may be indicated as the first common search space resource through the MIB.

Optionally, the configuration parameter corresponding to the first common search space resource may be predefined or indicated by the MIB.

Optionally, the second common search space resource may be configured through a system message. Optionally, one or more candidate resources of the second common search space resource may also be implicitly indicated by the initial access information (e.g., time-frequency resources of a synchronization signal block), and then one of the one or more candidate resources may be indicated as the second common search space resource through a system message.

In some possible implementations, the configuration parameters corresponding to the second common search space resource may be the same as the configuration parameters corresponding to the first common search space by default.

In some possible implementations, the configuration parameters corresponding to the second common space search resource may be configured through a system message. Optionally, the configuration parameters corresponding to the second common search space resource and the first common search space resource may be different. For example, a first common search space resource corresponds to a first configuration parameter and a second common search space resource corresponds to a second configuration parameter.

It should be understood that the first common search space resource includes a synchronization signal block, and the sequence number of the center RB of the first common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relation:

wherein,is the sequence number of the lowest RB of the synchronization signal block,a sequence number, W, of a center RB of the first common search space resource_minNumber of RBs corresponding to the minimum of the maximum bandwidths of a plurality of UEs within a cell, w₁The number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, m is the number of RBs of the synchronization signal block, w₁≤W_minAnd when w is an even number, the center RB of the first common search space resource is the w-th RB in the RBs corresponding to the transmission bandwidth of the first common search space resource on the frequency domain₁2+1 RB.

w₁May be configured or predefinedM andmay be predefined.

Alternatively, if w₁Is even number, and the center RB of the first common search space resource is the w-th RB in the RBs corresponding to the transmission bandwidth of the first common search space resource on the frequency domain₁A/2 RBs, the sequence number of the center RB of the first common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relation:

optionally, a sequence number of a lowest RB of the first common search space resourceSequence number of lowest RB with the synchronization signal blockSatisfies the following relation:

optionally, a sequence number of a highest RB of the first common search space resourceSequence number of lowest RB with the synchronization signal blockSatisfies the following relation:

the relevant parameters in the relations (10), (11) and (12) can refer to the relevant description of the relation (9), and are not described herein again.

The second common search space resource may or may not include a synchronization signal block.

In some possible implementations, the second common search space resource does not include a synchronization signal block, a lowest RB, a center RB, or a highest RB of the second common search space resource may be any one RB in a system downlink bandwidth, and a sub-band occupied by the second common search space resource in a frequency domain is less than or equal to a minimum value W in a maximum bandwidth of a plurality of UEs of a cell_min。

The sequence number of the lowest RB of the second common search space resource satisfies the following relation:

or, the sequence number of the center RB of the second common search space resource satisfies the following relation:

or, the sequence number of the highest RB of the second common search space resource satisfies the following relation:

wherein,a sequence number of a lowest RB of the second common search space resource,a sequence number of a center RB of the second common search space resource,a sequence number, w, of the highest RB of the second common search space resource₂A number of RBs of a sub-band occupied in a frequency domain for the second common search space resource,the number of RBs of the downlink bandwidth may be a bandwidth of the system, or a bandwidth of a segment of frequency band.

In some possible implementations, the first common search space resource and the second common search space resource share a partial frequency band in a frequency domain.

In some possible implementations, the first common search space resource and the second common search space are orthogonal in a frequency domain.

In some possible implementations, the second common search space resource does not include a synchronization signal block, and a lowest RB, a center RB, or a highest RB of the second common search space resource may be any one RB in a system downlink bandwidth. Optionally, the bit overhead Y of the second common downlink control information satisfies the following relation:

if it isThen

If it isThen

Wherein L is_maxA maximum number of RBs of a sub-band occupied in a frequency domain for the second common search space resource,and the number of RBs corresponding to the downlink bandwidth of the system.

In a sixth aspect, a communication method is provided, the method comprising:

if the total bandwidth of the first public search space resource and the second public search space resource on the frequency domain is larger than the maximum bandwidth of the UE, the network equipment sends first public downlink control information and second public downlink control information by using the first public search space resource on a transmission time unit which transmits system messages in a Random Access Response (RAR) time window, and sends the second public downlink control information by using the second public search resource on a transmission time unit which does not transmit the system messages in the RAR time window; or,

if the bandwidth of a first public search space resource and the bandwidth of a second public search space resource in a frequency domain are less than or equal to the maximum bandwidth of the UE, the configuration parameters corresponding to the first public search space resource and the second public search space resource are different, and the UE does not support multi-configuration-parameter parallel transmission, the network equipment sends first public downlink control information and second public downlink control information by using the first public search space resource on a transmission time unit for transmitting system messages in an RAR time window, and sends the second public downlink control information by using the second public search space resource on a transmission time unit for not transmitting system messages in the RAR time window; or,

if the bandwidth of the first public search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, the bandwidth of the second public search space resource in the frequency domain is greater than the maximum bandwidth of the UE, or the configuration parameters corresponding to the first public search space resource and the second public search space resource are different and the UE does not support the configuration parameters corresponding to the second public search space resource, the network equipment only uses the first public search space resource to send the first public downlink control information and the second public downlink control information; or,

in other cases, the network device uses the first common search space resource to send the first common downlink control information, and uses the second common search space resource to send the second common downlink control information.

Optionally, the network device may configure the first common search space resource for the UE through the MIB, or the network device may also implicitly indicate the first common search space resource through the sent initial access information. The initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, where the Synchronization Signal block may include a Primary SS and/or a Secondary SS, and may further include a MIB.

Optionally, the network device may also implicitly indicate one or more candidate resources of the first common search space resource to the UE through initial access information (e.g., time-frequency resources of a synchronization signal block), and then indicate one candidate resource of the one or more candidate resources to the UE through the transmitted MIB as the first common search space resource.

Optionally, the network device may configure, through the MIB, a configuration parameter corresponding to the first common search space resource for the UE.

Optionally, the network device may configure the second common search space resource for the UE through a system message, or the network device may also implicitly indicate the second common search space resource to the UE through initial access information.

Optionally, the network device may also implicitly indicate one or more candidate resources of the second common search space resource to the UE through the transmitted initial access information (e.g., time-frequency resources of a synchronization signal block), and then indicate one candidate resource of the one or more candidate resources to the UE as the second common search space resource through the transmitted system message.

In some possible implementations, the network device may configure, through the system message, a configuration parameter corresponding to the second common space search resource for the UE. Optionally, the configuration parameters corresponding to the second common search space resource and the first common search space resource may be different. For example, a first common search space resource corresponds to a first configuration parameter and a second common search space resource corresponds to a second configuration parameter.

It should be understood that the first common search space resource includes a synchronization signal block, and the sequence number of the central PRB of the first common search space resource and the sequence number of the lowest PRB of the synchronization signal block satisfy the following relation:

w₁May be configured or predefined, m andmay be predefined.

In some possible implementations, the second common search space resource does not include a synchronization signal block, a lowest RB, a center RB, or a highest RB of the second common search space resource may be any one RB in a system downlink bandwidth, and a sub-band occupied by the second common search space resource in a frequency domain is smaller than or equal to a maximum bandwidth of a plurality of UEs of a cellMinimum value W of_min。

wherein,a sequence number of a lowest RB of the second common search space resource,a sequence number of a center RB of the second common search space resource,a sequence number, w, of the highest RB of the second common search space resource₂A number of RBs of a sub-band occupied in a frequency domain for the second common search space resource,the number of RBs that is the system downlink bandwidth.

In some possible implementations, the second common search space resource does not include a synchronization signal block, and the starting RB, the center RB, or the highest RB of the second common search space resource may be any one RB in a system downlink bandwidth. Optionally, the bit overhead Y of the second common downlink control information satisfies the following relation:

if it isThen

If it isThen

In a seventh aspect, another communication method is provided, the method comprising:

the network equipment sends n system information SI messages on the same transmission time unit, the frequency domain resources occupied by the n SI messages are different, the sending periods of the n messages are different, and n is an integer greater than or equal to 2.

Wherein the n SI messages use the same configuration parameters. The configuration parameters may be predefined or indicated by system messages.

Because the SI message and the data using different configuration parameters need to reserve the guard band during frequency division multiplexing, and in the prior art, the SI messages in different periods are sent in a time division multiplexing manner, for the SI message in each period, the guard band needs to be reserved during frequency division multiplexing with the data using different configuration parameters, so that more guard bands need to be reserved, and the waste of frequency domain resources is caused.

In the embodiment of the invention, the plurality of SI messages with different periods are sent on the same transmission time unit, and the plurality of SI messages are transmitted in an FDM mode, so that the protection band which needs to be reserved when the SI messages with different periods and the data using different configuration parameters are transmitted in parallel in the FDM mode is favorably reduced, and the waste of frequency domain resources is favorably avoided.

In some possible implementations, the method further includes:

the network device sends a system information block, SIB1, message, frequency domain resources of the n SI messages being determined according to indexes of the n SI messages in the SIB1 message.

In some possible implementations, the time windows in which the n SI messages are each located have the same starting transmission time unit. The start transmission time unit may be a start frame, a start slot, or a start minislot. The start frame refers to a system frame at a start position.

Optionally, the offset of the starting transmission time element of the time window in which each of the n SI messages is located from the starting transmission time element of SIB1 is predefined or configured through SIB 1. For example, the value of the offset may be 0, or may be other values, which is not limited in the embodiment of the present invention. When the offset takes the value of 0, the SIB1 has the same starting tti as that of the n SI messages.

In some possible implementations, a starting frame and a starting slot of a time window in which a kth SI message of the n SI messages is located satisfy the following relation:

wherein n is_fFor the start frame of the time window in which the kth SI message is located, n_sIs the initial time slot of the time window of the kth SI message, n is a predefined value, T_kis the period of the time window in which the kth SI message is located, α_offsetThe offset of the starting slot of the window in which the kth SI message is located relative to the starting slot of SIB1 is indicated, k being an integer greater than or equal to 2 and less than or equal to n.

In an eighth aspect, another communication method is provided, the method comprising:

the method comprises the steps that User Equipment (UE) receives n SI messages sent by network equipment in the same transmission time unit, the frequency domain resources of the n SI messages are different, the sending periods of the n SI messages are different, and n is an integer larger than or equal to 2.

In some possible implementations, the method further includes:

the user equipment receives a system information block SIB1 message sent by the network equipment, and frequency domain resources of the n SI messages are determined according to indexes of the plurality of SI messages in the SIB1 message.

In a ninth aspect, a network device is provided for executing the method of the network device, and in particular, the network device may include a module for executing the corresponding steps of the network device. Such as a processing unit, a transmitting unit and/or a receiving unit, etc.

In a tenth aspect, a user equipment is provided, and a method for the user equipment is provided. Such as a processing unit, a transmitting unit, and a receiving unit.

In an eleventh aspect, a network device is provided, which includes a memory for storing a computer program and a processor for calling and running the computer program from the memory, so that the network device performs the method of the network device.

Optionally, the network device may further comprise a transceiver for transceiving signals under the control of the processor.

In a twelfth aspect, a user equipment is provided, which comprises a memory for storing a computer program and a processor for calling and running the computer program from the memory, so that the terminal equipment performs the method of the terminal equipment.

Optionally, the user equipment may further comprise a transceiver for transceiving signals under the control of the processor.

In a thirteenth aspect, a computer-readable storage medium is provided, having stored therein instructions, which, when run on a computer, cause the computer to perform the method of the above-described aspects.

In a fourteenth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

Drawings

Fig. 1 is a schematic flow chart diagram of a communication method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of common search space resources and UE-specific search space resources according to an embodiment of the present invention;

FIG. 3 is a schematic flow chart diagram of a communication method according to another embodiment of the present invention;

fig. 4 is a schematic diagram of common search space resources and UE-specific search space resources according to another embodiment of the present invention;

FIG. 5 is a schematic flow chart diagram of a communication method according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a first common search space resource and a second common search space resource in accordance with another embodiment of the present invention;

FIG. 7 is a schematic diagram of a first common search space resource and a second common search space resource in accordance with another embodiment of the present invention;

FIG. 8 is a schematic flow chart diagram of a communication method according to another embodiment of the present invention;

fig. 9 is a schematic diagram of an SI window in a communication method according to another embodiment of the present invention;

fig. 10 is a schematic diagram of an SI window in a communication method according to another embodiment of the present invention;

FIG. 11 is a block diagram of a network device according to an embodiment of the invention;

FIG. 12 is a schematic diagram of a network device according to another embodiment of the present invention;

fig. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a user equipment according to another embodiment of the present invention.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

In different communication systems, the network devices in the embodiments of the present invention may be different devices. For example, the network device may be a Base Station, a Base Station Controller (BSC), a Radio Network Controller (RNC), an evolved Node B (eNB or e-NodeB) in an LTE system, a Base Station (NodeB) in a WCDMA system, or a gNB in a 5G system.

In the embodiment of the present invention, User Equipment (UE) may also be referred to as Terminal Equipment, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), and the like, where the UE may communicate with one or more core networks through a radio access network, for example, the UE may be a Mobile phone (or referred to as a "cellular" phone), a computer with a communication function, and the like, and the UE may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile device.

In the embodiment of the present invention, the configuration parameter may include at least one of parameters such as a subcarrier spacing size, a cyclic prefix length, a transmission time unit length, a symbol length, and a symbol number of a transmission time unit. It should be understood that the configuration parameters may also be referred to as a system parameter set or other names, which are not limited by the embodiment of the present invention.

It should also be understood that the transmission time unit may be a time unit such as a timeslot, timeslot aggregation, minislot or minislot aggregation, and the embodiment of the present invention is not limited thereto.

The embodiment of the invention provides a communication method, which is beneficial for UE to monitor public search space resources and UE specific search space resources simultaneously by determining the UE specific search space resources according to the maximum bandwidth of the UE and the public search space resources and configuring the UE specific search space resources for the UE.

Fig. 1 is a schematic flow chart diagram of a communication method 100 according to an embodiment of the present invention. As shown in fig. 1, the method 100 includes the following.

110. The network device determines the UE-specific search space resources based on the maximum bandwidth of the UE and the common search space resources.

120. The network equipment sends configuration information to the UE, and the configuration information is used for indicating the UE specific search space resources.

130. The UE receives the configuration information.

140. And the UE detects the UE specific downlink control information by adopting the UE specific search space resource according to the received configuration information.

The common downlink control information may be used for scheduling system messages and random access responses, and the UE-specific downlink control information may be used for scheduling information for UE-specific uplink and downlink data transmission.

The common downlink control information is downlink control information scrambled by the RNTI. The public RNTI is a public parameter which is predefined or is configured to all or a group of UE of a cell by network equipment, and comprises SI-RNTI, P-RNTI, RA-RNTI and the like.

The UE-specific downlink control information is downlink control information scrambled by the UE-specific RNTI. The UE-specific RNTI is a parameter which is configured to the specific UE in the cell by the network equipment and comprises C-RNTI, temporary C-RNTI, SPS C-RNTI and the like.

Alternatively, the common search space resource may be configured through the MIB or implicitly indicated by the initial access information. The initial access information may be a time-frequency resource of an SS block, and the synchronization signal block may include a primary synchronization signal (PrimarySS) and/or a Secondary synchronization signal (Secondary SS), and may further include a MIB.

Alternatively, one or more candidate resources of the space resource may also be commonly searched by the initial access information (e.g., time-frequency resources of the synchronization signal block), and then one of the one or more candidate resources may be indicated as the common search space resource through the MIB.

The bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of maximum bandwidths of a plurality of UEs within the cell. For example, the bandwidth of the common search space resource in the frequency domain is less than or equal to the minimum of the maximum bandwidths of all or a group of UEs within the cell. This ensures that the UEs within the cell are able to monitor the common search space resources.

Alternatively, the configuration parameters corresponding to the common search space resources may be predefined or indicated by the MIB.

Optionally, the network device sending the configuration information to the UE in 120 includes: the network equipment sends RRC signaling to the UE, wherein the RRC signaling comprises the configuration information. That is, the network device may configure the UE-specific search space resources for the UE through RRC signaling. Accordingly, the UE receives the RRC signaling in 130. The UE may obtain the configuration information from the RRC signaling after receiving the RRC signaling.

Optionally, the configuration parameters corresponding to the UE-specific search space resources may also be configured through RRC signaling.

Optionally, the configuration parameters corresponding to the common search space resources are the same as the configuration parameters corresponding to the UE-specific search space resources.

In some embodiments, the total bandwidth of the UE-specific search space resources and the common search space resources in the frequency domain is less than or equal to the maximum bandwidth of the UE.

It should be understood that the total bandwidth of the UE-specific search space resources and the common search space resources in the frequency domain refers to: a bandwidth of the UE-specific search space resource in the frequency domain, a bandwidth of the common search space resource in the frequency domain, and a spacing bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain.

For example, the total bandwidth of the UE-specific search space resources and the common search space resources in the frequency domain refers to: a number of RBs between a highest Resource Block (RB) of the UE-specific search space Resource and a lowest RB of the common search space Resource, or a number of RBs between a highest RB of the common search space Resource and a lowest RB of the UE-specific search space Resource.

Optionally, as shown in fig. 2, the common search space resource and the UE-specific search space resource share a partial frequency band in the frequency domain, where the configuration parameters corresponding to the UE-specific search space resource are the same as the configuration parameters corresponding to the common search space resource. In some embodiments, the sequence number of the center RB of the UE-specific search space resource and the sequence number of the lowest RB of the common search space resource satisfy the following relationship:

wherein,a sequence number of the lowest RB that is a common search space resource,the number of the central RB of the UE-specific search space resource is a number, W is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, v is the number of RBs of the transmission bandwidth of the UE-specific search space resource in the frequency domain, W is the number of RBs corresponding to the maximum bandwidth of the UE, v is less than or equal to W, and when v is an even number, the central RB of the UE-specific search space resource is a v/2+1 th RB of the RBs corresponding to the transmission bandwidth of the UE-specific search space resource in the frequency domain.

optionally, the sequence number of the lowest RB of the UE-specific search space resourcesSequence number of the lowest RB from common search space resourcesSatisfies the following relation:

optionally, the sequence number of the highest RB of the UE-specific search space resourceSequence number of the lowest RB from common search space resourcesSatisfies the following relation:

It should also be noted that various equivalent modifications or changes made by those skilled in the art according to the above relations (5), (6), (7) and (8) also fall within the scope of the embodiments of the present invention.

Optionally, the method shown in fig. 1 may further include: the UE sends indication information to the network equipment, wherein the indication information is used for indicating the maximum bandwidth of the UE. For example, the UE may report the maximum bandwidth of the UE through a preamble sequence or a random access message 3(Msg 3).

Optionally, the common search space resource includes a synchronization signal block, and the sequence number of the center RB of the common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relation:

wherein,the sequence number of the lowest RB of the synchronization signal block,number of central RB for common search space resource, W_minThe number of RBs corresponding to the minimum value in the maximum bandwidths of a plurality of UEs in a cell, W is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, m is the number of RBs of the synchronization signal block, and W is less than or equal to W_minAnd when w is an even number, the center RB of the common search space resource is the w/2+1 th RB among RBs to which the transmission bandwidth of the common search space resource on the frequency domain corresponds. w may be configured or predefined, m andmay be predefined.

Alternatively, if w is an even number and the central RB of the common search space resource is the w/2 th RB of the RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, the sequence number of the central RB of the common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relation:

optionally, the sequence number of the lowest RB of the common search space resourceSequence number of the lowest RB associated with a synchronization signal blockSatisfies the following relation:

optionally, the sequence number of the highest RB of the common search space resourceSequence number of the lowest RB associated with a synchronization signal blockSatisfies the following relation:

Another embodiment of the present invention further provides another communication method, which is applicable to a scenario of large bandwidth or multi-configuration parameter parallel transmission, and can support UE blind detection of common downlink control information and UE specific downlink control information with different capabilities, which is helpful for reducing the number of times of UE blind detection with different capabilities. Fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present invention. As shown in fig. 3, the method includes:

310. and the UE reports indication information to the network equipment, wherein the indication information is used for indicating the maximum bandwidth of the UE and/or whether the UE supports multi-configuration parameter parallel transmission.

320. The network device receives the indication information.

It should be understood that in a large bandwidth scenario, the indication information is used to indicate the maximum bandwidth of the UE; in the scenario of multi-configuration parameter parallel transmission, the indication information is used to indicate whether the UE supports multi-configuration parameter parallel transmission.

If the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain is greater than the maximum bandwidth of the UE, or the configuration parameters corresponding to the UE-specific search space resource and the common search space resource are different, and the UE does not support the parallel transmission of multiple configuration parameters, the method shown in fig. 3 may further include: 330 and 340, or 350 and 360.

330. The network equipment transmits first UE-specific downlink control information and common downlink control information using the common search space resource in a first transmission time unit, and transmits second UE-specific downlink control information using the UE-specific search space resource in a second transmission time unit.

It should be noted that the network device sending the first UE-specific downlink control information and the common downlink control information using the common search space resource includes: the network device transmits the common downlink control information and the first UE-specific downlink control information using some or all of the common search space resources.

For example, the common search space resource includes 16 CCEs, where 8 CCEs are used to transmit common downlink control information, and the other 8 CCEs are used to transmit UE-specific downlink control information; or 4 CCEs are used to transmit common downlink control information, and 8 CCEs are used to transmit UE-specific downlink control information; or 8 CCEs are used for transmitting common downlink control information, and 8 CCEs are used for transmitting UE-specific downlink control information; alternatively, 4 CCEs are used to transmit common downlink control information, 4 CCEs are used to transmit UE-specific downlink control information, and the like.

Similarly, the network device transmitting the second UE-specific downlink control information using the UE-specific search space resource includes: the network device transmits second UE-specific downlink control information using some or all of the UE-specific search space resources.

340. The UE detects first UE-specific downlink control information and common downlink control information using common search space resources in a first transmission time unit, and detects second UE-specific downlink control information using UE-specific search space resources in a second transmission time unit.

350. The network device transmits the UE-specific downlink control information using the UE-specific search space resources in the first transmission time unit, and transmits only the common downlink control information using the common search space resources in the second transmission time unit.

It should be noted that the network device sending the UE-specific downlink control information by using the UE-specific search space resource includes: the network device transmits the UE-specific downlink control information using some or all of the UE-specific search space resources. The network device transmitting the common downlink control information by using the common search space resource includes: the network device transmits the common downlink control information using part or all of the common search space resources.

360. The UE detects UE-specific downlink control information using UE-specific search space resources in a first transmission time unit, and only detects the common downlink control information using common search space resources in a second transmission time unit.

The first transmission time unit is different from the second transmission time unit, and the time sequence of the first transmission time unit and the second transmission time unit is not limited.

It should be understood that, if the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, or the configuration parameters corresponding to the UE-specific search space resource and the common search space resource are different, and the UE supports parallel transmission of multiple configuration parameters, the network device may simultaneously use the UE-specific search space resource and the common search space resource to send UE-specific downlink control information and common downlink control information, and accordingly the UE may simultaneously monitor the common search space and the UE-specific search space resource.

Therefore, the UE in the embodiment of the present invention may blind-detect the common downlink control information and the UE-specific downlink control information in different manners according to its own capability.

Specifically, the UE not detecting the common search space resource and the UE-specific search space resource simultaneously includes:

alternatively, the UE detects the UE-specific downlink control information using the UE-specific search space resource in the first transmission time unit, and only detects the common downlink control information using the common search space resource in the second transmission time unit.

Specifically, the UE simultaneously monitoring the common search space resource and the UE-specific search space resource includes:

the UE detects the UE-specific downlink control information and the common downlink control information using the common search space resource, and simultaneously detects the UE-specific downlink control information using the UE-specific search space resource.

It should be noted that, in the embodiment of the present invention, the UE-specific search space resource and the common search space resource may share a part of the frequency band in the frequency domain, as shown in fig. 2. At this time, the UE-specific search space resource and the common search space resource have the same corresponding configuration parameters.

Alternatively, the UE-specific search space resource and the common search space resource may also be orthogonal in the frequency domain, i.e. the UE-specific search space resource and the common search space resource do not overlap with each other in the frequency domain, as shown in fig. 4. In this case, the configuration parameters corresponding to the UE-specific search space resource and the common search space resource may be the same or different.

Another embodiment of the present invention further provides a communication method, where two common search space resources are configured in the method, the two common search space resources are used for transmitting different common downlink control information, and the UE blindly detects the common downlink control information in different manners according to a relationship between the two common search space resources and its own maximum bandwidth, or according to its own multi-configuration parameter parallel transmission capability. Therefore, the embodiment of the invention is suitable for a scene of large bandwidth or multi-configuration parameter parallel transmission, and can support the UE with different capabilities to blindly detect the common downlink control information. Fig. 5 is a schematic flow chart diagram illustrating a communication method 500 according to an embodiment of the present invention. As shown in fig. 5, the method 500 includes the following.

510. The UE sends indication information to the network equipment, wherein the indication information is used for indicating the maximum bandwidth of the UE or whether the UE supports multi-configuration parameter parallel transmission.

The network device receives 520 the indication.

After receiving the indication information, the network device may send the first common downlink control information and the second common downlink control information in different manners according to the capability of the UE.

If the first preset condition is met, the method 500 may further include, after 520: 520 and 530. The first preset condition may include: the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain is larger than the maximum bandwidth of the UE; or the bandwidths of the first common search space resource and the second common search space resource in the frequency domain are less than or equal to the maximum bandwidth of the UE, the configuration parameters corresponding to the first common search space resource and the second common search space resource are different, and the UE does not support the parallel transmission of multiple configuration parameters.

530. The network equipment uses the first public search space resource to send the first public downlink control information and the second public downlink control information on the transmission time unit which transmits the system message in the RAR time window, and uses the second public search resource to send the second public downlink control information on the transmission time unit which does not transmit the system message in the RAR time window.

It should be noted that the sending, by the network device, the first common downlink control information and the second common downlink control information using the first common search space resource includes: and the network equipment transmits the first common downlink control information and the second common downlink control information by using part or all of the first common search space resources. The network device sending the second common downlink control information by using the second common search resource includes: and the network equipment transmits the second public downlink control information by using part or all of the second public search resources.

540. And the UE detects the first public downlink control information and the second public downlink control information by using the first public search space resource on the transmission time unit which transmits the system message in the RAR time window, and detects the second public downlink control information by using the second public search resource on the transmission time unit which does not transmit the system message in the RAR time window.

If the second preset condition is met, the method 500 may further include, after 520: 550 and 560. The second preset condition may include: the bandwidth of the first public search space resource on the frequency domain is less than or equal to the maximum bandwidth of the UE, and the bandwidth of the second public search space resource on the frequency domain is greater than the maximum bandwidth of the UE; or the bandwidth of the first common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, the configuration parameters corresponding to the first common search space resource and the second common search space resource are different, and the UE does not support the configuration parameters corresponding to the second common search space resource.

550. The network device transmits the first common downlink control information and the second common downlink control information using only the first common search space resource.

560. The UE detects the first common downlink control information and the second common downlink control information using only the first common search space resource.

If the third preset condition is met, the method 500 may further include, after 520: 570 and 580. The third preset condition may include: the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE.

570. The network device transmits the first common downlink control information using the first common search space resource and transmits the second common downlink control information using the second common search space resource.

580. The UE detects the first common downlink control information using the first common search space resource and detects the second common downlink control information using the second common search space resource.

It should be understood that the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain refers to: a bandwidth of the first common search space resource in the frequency domain, a bandwidth of the second common search space resource in the frequency domain, and an interval bandwidth of the first common search space resource and the second common search space resource in the frequency domain.

For example, the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain refers to: a number of RBs between a highest RB of the first common search space resource and a lowest RB of the second common search space resource, or a number of RBs between a highest RB of the second common search space resource and a lowest RB of the first common search space resource.

The first common search space resource is used for transmitting first common downlink control information and/or second common downlink control information, and the second common search space resource is used for transmitting second common downlink control information. The first common downlink control information comprises downlink control information for scheduling system messages, and the second common downlink control information comprises downlink control information for scheduling a UE RAR.

Alternatively, the first common search space resource may be configured through the MIB or implicitly indicated by the initial access information. The initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, where the Synchronization Signal block may include a Primary SS and/or a Secondary SS, and may further include a MIB.

Alternatively, one or more candidate resources of the first common search space resource may also be implicitly indicated by the initial access information (e.g., time-frequency resources of a synchronization signal block), and then one of the one or more candidate resources may be indicated as the first common search space resource through the MIB.

Optionally, the configuration parameters corresponding to the first common search space resource may be predefined or indicated by the MIB.

Alternatively, the second common search space resource may be configured through a system message. Alternatively, one or more candidate resources of the second common search space resource may also be implicitly indicated by the initial access information (e.g., time-frequency resources of a synchronization signal block), and then one of the one or more candidate resources may be indicated as the second common search space resource through a system message.

In some embodiments, the configuration parameters corresponding to the second common search space resource may be the same as the configuration parameters corresponding to the first common search space by default.

In some embodiments, the configuration parameters corresponding to the second common space search resource may be configured through system messages. Optionally, the configuration parameters corresponding to the second common search space resource and the first common search space resource may be different. For example, a first common search space resource corresponds to a first configuration parameter and a second common search space resource corresponds to a second configuration parameter.

wherein,the sequence number of the lowest RB of the synchronization signal block,is the sequence number, W, of the center RB of the first common search space resource_minNumber of RBs corresponding to the minimum of the maximum bandwidths of a plurality of UEs within a cell, w₁Number of RBs corresponding to transmission bandwidth in frequency domain for common search space resource, m number of RBs for synchronization signal block, w₁≤W_minAnd when w is an even number, the center RB of the first common search space resource is the w-th RB in the RBs corresponding to the transmission bandwidth of the first common search space resource on the frequency domain₁2+1 RB.

w₁May be configured or predefined, m andmay be predefined.

Alternatively, if w₁Is even number, and the center RB of the first common search space resource is the w-th RB in the RBs corresponding to the transmission bandwidth of the first common search space resource on the frequency domain₁And 2 RBs, the sequence number of the center RB of the first public search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relation:

optionally, the sequence number of the lowest RB of the first common search space resourceSequence number of the lowest RB associated with a synchronization signal blockSatisfies the following relation:

optionally, the sequence number of the highest RB of the first common search space resourceSequence number of the lowest RB associated with a synchronization signal blockSatisfies the following relation:

When the above relations (9) to (10) are satisfied, the UE may simultaneously monitor the first common search space resource and the synchronization signal block.

In some embodiments, the second common search space resource does not include a synchronization signal block, the lowest RB, the center RB, or the highest RB of the second common search space resource may be any one RB in a system downlink bandwidth, and a subband occupied by the second common search space resource in a frequency domain is less than or equal to a minimum value W in a maximum bandwidth of a plurality of UEs of the cell_min。

wherein,a sequence number of the lowest RB that is a second common search space resource,is the sequence number of the center RB of the second common search space resource,a sequence number, w, of the highest RB of the second common search space resource₂The number of RBs of the sub-band occupied in the frequency domain for the second common search space resource,the downlink bandwidth may be a bandwidth of the system or a bandwidth of a segment of frequency band, which is the number of RBs of the downlink bandwidth.

Alternatively, the first common search space resource and the second common search space resource share a partial frequency band in the frequency domain, as shown in fig. 6. At this time, the configuration parameters corresponding to the second common search space resource are the same as the configuration parameters corresponding to the first common search space resource.

Optionally, the first common search space resource and the second common search space are orthogonal in the frequency domain, i.e. the first common search space resource and the second common search space do not overlap each other in the frequency domain, as shown in fig. 7. In this case, the configuration parameters corresponding to the second common search space resource may be the same as or different from the configuration parameters corresponding to the first common search space resource.

In some embodiments, the second common search space resource does not include a synchronization signal block, and the lowest RB, the center RB, or the highest RB of the second common search space resource may be any one RB in the system downlink bandwidth. Optionally, the bit overhead Y of the second common downlink control information satisfies the following relation:

if it isThen

If it isThen

Wherein L is_maxThe maximum number of RBs of the sub-band occupied in the frequency domain for the second common search space resource,and the number of RBs corresponding to the downlink bandwidth of the system.

And determining the bit overhead of the second common downlink control information according to the relation, which is beneficial to reducing the bit number of the downlink control information and further reducing the control overhead.

Because the SI message and the data using different configuration parameters need to reserve a guard band during frequency division Multiplexing, and in the prior art, the SI messages in different periods are sent in a Time Division Multiplexing (TDM) manner, so that for the SI message in each period, the guard band needs to be reserved during frequency division Multiplexing of the data using different configuration parameters, which requires more guard bands to be reserved, thereby causing waste of frequency domain resources. Therefore, another embodiment of the present invention provides a communication method, where multiple SI messages with different periods are sent in the same transmission time unit, and the multiple SI messages are transmitted in an FDM manner, so as to reduce a guard band that needs to be reserved when the SI messages with different periods and data using different configuration parameters are transmitted in parallel in the FDM manner, thereby avoiding waste of frequency domain resources. Fig. 8 is a schematic flow chart of a communication method according to an embodiment of the present invention. As shown in fig. 8, the method includes:

810. the network equipment transmits n System Information (SI) messages on the same transmission time unit, wherein the frequency domain resources of the n SI messages are different, the transmission periods of the n SI messages are different, and n is an integer greater than or equal to 2. 820. The UE receives the n SI messages.

It should be noted that the same configuration parameters are used for the n SI messages. The configuration parameters may be predefined or indicated by system messages.

As shown in fig. 9, the sub-bands FDM of the SI windows of the n SI messages are distributed within the system bandwidth. In this way, in a scenario of multi-configuration parameter parallel transmission, only two guard bands need to be reserved at the outermost side of the n sub-bands of the n SI messages, and two guard bands do not need to be reserved for the sub-bands of each SI message, which is beneficial to avoiding the waste of frequency domain resources.

As shown in fig. 10, the starting transmission time units of the SI windows corresponding to the n SI messages are the same. In fig. 10 SI-win denotes the SI window. Since the periods of the SI windows corresponding to the n SI messages are different, the distribution of the SI windows of the n SI messages presents a nested structure as shown in fig. 10. In other words, the SI window with the shorter period is included on the slot where the SI window with the longer period is located.

The frequency domain resources of the n SI messages may be predefined or may be configured by the network device.

Optionally, as shown in fig. 8, before 810, the method may further include: 830. the network equipment sends a System Information Block 1 (SIB 1) message, and the frequency domain resources of n SI messages are determined according to the index of the n SI messages in the SIB1 message; 840. the UE receives this SIB1 message. After the UE receives the SIB1 message, the frequency domain resources of the n SI messages may be determined according to the indexes of the n SI messages in the SIB1 message. For example, the offset value x of the starting RB corresponding to the kth SI message in the n SI messages relative to the starting RB corresponding to the 1 st SI message satisfies: x is (n-1) x m, where m is the number of RBs corresponding to the frequency domain width of one SI message, and the starting RB corresponding to the kth SI message is I_RB+ x, wherein I_RBOffset value in system bandwidth for starting RB corresponding to the 1 st SI message. I is_RBConfigured through broadcast signaling or higher layer signaling. Here the ordering of the SI messages is determined from the index in the SIB1 message. Optionally, the time windows in which the n SI messages are respectively located have the same starting transmission time unit.The start transmission time unit may be a start frame, a start slot, or a start minislot. The start frame refers to a system frame at the start position.

Optionally, the starting subframe and the starting slot of the time window in which the kth SI message of the n SI messages is located satisfy the following relation:

wherein n is_fIs the starting subframe of the time window in which the kth SI message is located, n_sIs the starting time slot of the time window of the kth SI message, n is a predefined value, T_kis the period of the time window in which the kth SI message is located, α_offsetIs the offset of the starting slot of the window in which the kth SI message is located relative to the starting slot of SIB 1. k is an integer greater than or equal to 2 and less than or equal to n.

α_offsetMay be predefined or configured for higher layer signaling.

Having described the communication method according to the embodiment of the present invention, a network apparatus and a UE according to the embodiment of the present invention will be described below with reference to fig. 11 to fig.

Fig. 11 is a schematic structural diagram of a network device 1100 according to an embodiment of the present invention. The network device 1100 shown in fig. 11 may be used to implement the related flow of the network device in fig. 1, 3, 5 or 8. As shown in fig. 11, the network device 1100 may include a processing unit 1110 and a transceiver unit 1120.

The processing unit 1110 may be configured to perform the functions of at least one of the following: in the method of fig. 1 110.

The transceiver 1120 may be configured to implement the functionality of at least one of the following: 120 in the method of fig. 1, 320, 330 and 350 in the method of fig. 3, 520, 530, 550 and 570 in the method of fig. 5, and 810 and 830 in the method of fig. 8.

For the sake of avoiding repetition, details related to the above method embodiments may be combined and referred to, and are not described herein again. Fig. 12 is a schematic structural diagram of a network device 1200 according to another embodiment of the present invention. As shown in fig. 12, the network device 1200 includes a processor 1210, a transceiver 1220 and a memory 1230, and the processor 1210, the transceiver 1220 and the memory 1230 communicate with each other through an internal connection path to transfer control signals and/or data signals. The memory 1230 is configured to store instructions and the processor 1210 is configured to execute the instructions stored by the memory 1230. The transceiver 1220 is used for transmitting and receiving signals under the control of the processor 1210.

Specifically, the transceiver 1220 is used to implement the functions of the transceiving unit 1120 in the network device 1100 shown in fig. 11. The processor 1210 is configured to implement the functions of the processing unit 1110 in the network device 1100 shown in fig. 11, and for brevity, the detailed description is omitted here.

Fig. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. The user equipment shown in fig. 13 may be used to implement the related flow of the user equipment in fig. 1, fig. 3, fig. 5 or fig. 8. As shown in fig. 13, the user equipment may include a processing unit 1310 and a transceiving unit 1320.

The processing unit 1310 may be used to implement the method 140 shown in fig. 1, the methods 340 and 360 shown in fig. 3, and the methods 540, 560, and 580 shown in fig. 5.

The transceiving unit 1320 may be configured to function to implement at least one of the following: 130 in the method of fig. 1, 310 in the method of fig. 3, 510 in the method of fig. 5, and 820 and 840 in the method of fig. 8.

For the sake of avoiding repetition, details related to the above method embodiments may be combined and referred to, and are not described herein again.

Fig. 14 is a schematic structural diagram of a terminal device 1400 according to another embodiment of the present invention. As shown in fig. 14, the terminal apparatus 1400 includes a processor 1410, a transceiver 1420, and a memory 1430, and the processor 1410, the transceiver 1420, and the memory 1430 communicate with each other through an internal connection path to transfer control signals and/or data signals. The memory 1430 is configured to store instructions and the processor 1410 is configured to execute the instructions stored in the memory 1430. The transceiver 1420 is used to transmit and receive signals under the control of the processor 1410.

In particular, the transceiver 1420 is used to implement the functions of the transceiving unit 1320 in the terminal device 1300 shown in fig. 13. The processor 1410 is configured to implement the functions of the processing unit 1310 in the terminal device 1300 shown in fig. 13, and for brevity, no further description is provided here.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

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

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

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

2. The method of claim 1, wherein a total bandwidth of the UE-specific search space resources and the common search space resources in a frequency domain is less than or equal to a maximum bandwidth of the UE.

3. The method according to claim 1 or 2, wherein the sequence number of the lowest resource block RB of the common search space resource and the sequence number of the lowest RB of the UE-specific search space resource satisfy the following relation:

wherein,a sequence number of a lowest RB of the common search space resources,the serial number of the lowest RB of the UE-specific search space resource is obtained, W is the number of RBs corresponding to the transmission bandwidth of the public search space resource in the frequency domain, v is the number of RBs corresponding to the transmission bandwidth of the UE-specific search space resource in the frequency domain, W is the number of RBs corresponding to the maximum bandwidth of the UE, and v is less than or equal to W.

4. The method of any of claims 1-3, wherein the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of a maximum bandwidth of a plurality of UEs within a cell.

5. The method according to any of claims 1 to 4, wherein before the network device determines the UE specific search space resources configured for a User Equipment (UE) according to a maximum bandwidth of the UE and common search space resources, the method further comprises:

6. A method of communication, comprising:

7. The method of claim 6, wherein a total bandwidth of the UE-specific search space resources and the common search space resources in a frequency domain is less than or equal to a maximum bandwidth of the UE.

8. The method according to claim 6 or 7, wherein the sequence number of the lowest resource block, RB, of the common search space resource and the sequence number of the lowest RB of the UE specific search space resource satisfy the following relation:

9. The method of any of claims 5 to 8, wherein the bandwidth of the common search space resource in the frequency domain is less than or equal to the minimum of the maximum bandwidths of the plurality of UEs within a cell.

10. The method of any of claims 6 to 9, further comprising:

11. A method of communication, comprising:

12. The method of claim 11, wherein the UE does not simultaneously monitor the common search space resource and the UE-specific search space resource, comprising:

or,

the UE detects the UE-specific downlink control information by using the UE-specific search space resource in a first transmission time unit, and only detects the common downlink control information by using the common search space resource in a second transmission time unit;

13. The method of claim 11 or 12, further comprising:

and the UE reports indication information to network equipment, wherein the indication information is used for indicating the maximum bandwidth of the UE and/or the UE does not support multi-configuration parameter parallel transmission.

14. A method of communication, comprising:

if the total bandwidth of the UE-specific search space resource and the public search space resource in the frequency domain is greater than the maximum bandwidth of the UE, the network equipment sends first UE-specific downlink control information and public downlink control information by using the public search space resource in a first transmission time unit, and sends second UE-specific downlink control information by using the UE-specific search space resource in a second transmission time unit, or the network equipment sends UE-specific downlink control information by using the UE-specific search space resource in the first transmission time unit, and only sends public downlink control information by using the public search space resource in the second transmission time unit;

or,

if the configuration parameters corresponding to the UE specific search space resource and the common search space resource are different, and the UE does not support multi-configuration parameter parallel transmission, the network equipment sends first UE specific downlink control information and common downlink control information by using the common search space resource in a first transmission time unit, and sends second UE specific downlink control information by using the UE specific search space resource in a second transmission time unit, or the network equipment sends the UE specific downlink control information by using the UE specific search space resource in the first transmission time unit, and only sends the common downlink control information by using the common search space resource in the second transmission time unit;

15. The method of claim 14, further comprising:

and the network equipment receives indication information reported by the UE, wherein the indication information is used for indicating the maximum bandwidth of the UE and/or the UE does not support multi-configuration parameter parallel transmission.

16. A network device, comprising:

the processing unit is used for determining the specific search space resource of the UE according to the maximum bandwidth and the public search space resource of the UE;

a transceiving unit, configured to send configuration information to the UE, where the configuration information is used to indicate the UE-specific search space resource determined by the processing unit.

17. The network device of claim 16, wherein a total bandwidth of the UE-specific search space resources and the common search space resources in a frequency domain is less than or equal to a maximum bandwidth of the UE.

18. The network device of claim 16 or 17, wherein the sequence number of the lowest resource block RB of the common search space resource and the sequence number of the lowest RB of the UE-specific search space resource satisfy the following relation:

wherein,a sequence number of a lowest RB of the common search space resources,is that it isThe UE specific search space resource comprises a sequence number of the lowest RB of the UE specific search space resource, W is the number of RBs corresponding to the transmission bandwidth of the public search space resource on a frequency domain, v is the number of RBs corresponding to the transmission bandwidth of the UE specific search space resource on the frequency domain, W is the number of RBs corresponding to the maximum bandwidth of the UE, and v is less than or equal to W.

19. The network device of any of claims 16-18, wherein a bandwidth of the common search space resource in a frequency domain is less than or equal to a minimum of a maximum bandwidth of a plurality of UEs within a cell.

20. The network device of any of claims 16 to 19,

the transceiver unit is further configured to receive indication information reported by the UE, where the indication information is used to indicate a maximum bandwidth of the UE.

21. A user device, comprising:

a transceiver unit, configured to receive configuration information sent by a network device, where the configuration information is used to indicate UE-specific search space resources configured for the UE, and the UE-specific search space resources are determined according to a maximum bandwidth of the UE and a common search space resource;

and the processing unit is used for detecting the UE specific downlink control information by the UE according to the configuration information received by the transceiver unit by adopting the UE specific search space resource.

22. The UE of claim 21, wherein a total bandwidth of the UE-specific search space resources and the common search space resources in a frequency domain is less than or equal to a maximum bandwidth of the UE.

23. The UE of claim 21 or 22, wherein the sequence number of the lowest RB of the common search space resource and the sequence number of the lowest RB of the UE specific search space resource satisfy the following relation:

24. The user equipment of any of claims 21-23, wherein the bandwidth of the common search space resource in the frequency domain is less than or equal to the minimum of the maximum bandwidths of the plurality of UEs in the cell.

25. The user equipment according to any of claims 21 to 24,

the transceiver unit is further configured to send indication information to the network device, where the indication information is used to indicate a maximum bandwidth of the UE.

26. A user device, comprising:

a processing unit to:

if the total bandwidth of the UE specific search space resource and the public search space resource in the frequency domain is larger than the maximum bandwidth of the UE, the public search space resource and the UE specific search space resource are monitored at the same time; or,

and if the configuration parameters corresponding to the UE specific search space resource and the common search space resource are different and the UE does not support the parallel transmission of the multiple configuration parameters, monitoring the common search space resource and the UE specific search space resource at the same time.

27. The ue of claim 26, wherein the processing unit is specifically configured to:

detecting first UE-specific downlink control information and common downlink control information using the common search space resource at a first transmission time unit, and detecting second UE-specific downlink control information using the UE-specific search space resource at a second transmission time unit; or,

detecting the UE-specific downlink control information using the UE-specific search space resource in a first transmission time unit, and detecting only the common downlink control information using the common search space resource in a second transmission time unit;

28. The user equipment according to claim 26 or 27, further comprising:

and the transceiver unit is used for reporting indication information to network equipment, wherein the indication information is used for indicating the maximum bandwidth of the UE and/or the UE does not support multi-configuration parameter parallel transmission.

29. A network device, comprising:

a transceiving unit for:

if the total bandwidth of the UE specific search space resource and the public search space resource on the frequency domain is larger than the maximum bandwidth of the UE, the public search space resource is used for sending first UE specific downlink control information and public downlink control information in a first transmission time unit, and the UE specific search space resource is used for sending second UE specific downlink control information in a second transmission time unit;

if the total bandwidth of the UE specific search space resource and the public search space resource on the frequency domain is larger than the maximum bandwidth of the UE, the UE specific search space resource is used for sending UE specific downlink control information in a first transmission time unit, and the public search space resource is used for only sending the public downlink control information in a second transmission time unit;

if the configuration parameters corresponding to the UE specific search space resource and the common search space resource are different and the UE does not support the parallel transmission of the multiple configuration parameters, the common search space resource is used to transmit the first UE specific downlink control information and the common downlink control information in the first transmission time unit, the UE specific search space resource is used to transmit the second UE specific downlink control information in the second transmission time unit,

if the configuration parameters corresponding to the UE specific search space resource and the public search space resource are different and the UE does not support the parallel transmission of the multiple configuration parameters, the UE specific search space resource is used for sending UE specific downlink control information in a first transmission time unit, and the public search space resource is used for sending only public downlink control information in a second transmission time unit;

30. The network device of claim 29,

the transceiver unit is further configured to receive indication information reported by the UE, where the indication information is used to indicate a maximum bandwidth of the UE and/or that the UE does not support multi-configuration parameter parallel transmission.