CN114339617B

CN114339617B - Configuration and use method and device of MBS resources in NR (multicast service) cell

Info

Publication number: CN114339617B
Application number: CN202011073877.5A
Authority: CN
Inventors: 魏立梅; 袁乃华; 陈迎; 朱玉梅; 周志宏; 范晨
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2023-07-04
Anticipated expiration: 2040-10-09
Also published as: CN114339617A

Abstract

The application provides a method and a device for configuring and using MBS resources in an NR cell, wherein the method comprises the following steps: determining a frequency interval for broadcast service transmission according to the predicted bandwidth for broadcast service transmission, the frequency interval including an initial bandwidth portion BWP; dividing the frequency interval into one or more BWP; configuring one or more secondary BWP to the broadcast service; for each radio frequency RF level, determining a frequency range for active/inactive DL BWP configuration, and when active/inactive DL BWP configured for the user equipment UE is located within the frequency range corresponding to the RF level of the UE and includes a frequency interval or secondary BWP for transmitting broadcast traffic, the UE may receive any one broadcast traffic while receiving unicast traffic; resources are allocated to the multicast traffic. Based on the MBS resource allocation method, broadcast service and multicast service can be provided for UE in various states.

Description

Configuration and use method and device of MBS resources in NR (multicast service) cell

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for configuring and using MBS resources in an NR cell.

Background

With the continuous development of wireless communication technology, new Radio Access (NR) systems have been introduced into people's lives. In order to provide multicast broadcast services (Multicast and Broadcast Service, MBS) in NR cells, release 17Work Item,R17 WI, release 17work item was set up at The third generation partnership project (The 3rd Generation Partnership Project,3GPP) radio access network (Radio Access Network, RAN) in 12, 2019: NR MBS.

In the NR MBS, a method of determining the configuration and use of MBS resources in the NR cell is required in order to provide broadcast services and multicast services to User Equipments (UEs) in various states in the NR cell.

Disclosure of Invention

The application provides a method and a device for configuring and using MBS resources in an NR cell, so that UE in various states can receive corresponding broadcast service and multicast service.

A first aspect of the present application provides a resource allocation method, including:

determining a frequency interval for broadcast service transmission according to the predicted bandwidth for broadcast service transmission, wherein the frequency interval comprises an initial bandwidth part BWP;

dividing the frequency interval into one or more BWPs, and configuring a control resource set CORESET and a search space on each divided BWP, wherein the CORESET and the search space are used for transmitting scheduling information of broadcast services transmitted on the corresponding BWP;

determining a frequency range for active/inactive DL BWP configuration for each radio frequency RF level, and when an active/inactive DL BWP configured for a user equipment UE is located in a frequency range corresponding to the RF level of the UE and includes the frequency interval for transmitting broadcast services, the UE may receive any one broadcast service while receiving unicast service;

In order to ensure that the UE receives the broadcast service while receiving the unicast service, frequency resources are configured for the multicast service in an area outside a frequency range corresponding to the maximum RF level, or reserved areas are respectively arranged on the left side and the right side of the frequency range corresponding to the maximum RF level, and frequency resources are configured for the multicast service in the frequency range corresponding to the maximum RF level and the area outside the reserved areas;

when the bandwidth corresponding to the frequency interval for transmitting the broadcast service is larger than the maximum bandwidth supported by the UE with the minimum radio frequency grade, compressing the frequency interval to the bandwidth corresponding to the frequency interval not larger than the maximum bandwidth supported by the UE with the minimum radio frequency grade under the condition of ensuring that the frequency interval contains the initial BWP, and simultaneously configuring one or more auxiliary BWP in the carrier frequency bandwidth for transmitting the broadcast service, and broadcasting configuration information of each auxiliary BWP on the initial BWP;

for each secondary BWP, to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, a frequency range for active/inactive DL BWP configuration is determined for each RF level, and when an active BWP configured for the UE is located within a frequency range corresponding to the RF level of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

Optionally, the determining the frequency interval for the broadcast service transmission according to the predicted bandwidth for the broadcast service transmission includes:

bandwidth intended for broadcast traffic transmissions;

on the premise that the initial BWP is used for transmitting broadcast services, determining the bandwidth which can be actually used for transmitting the broadcast services on the whole initial BWP;

a frequency interval within the cell for broadcast service transmission is determined.

Optionally, the configuring CORESET and search space on each BWP divided includes:

uniformly configuring one or more sets of CORESETs and search spaces for each of the partitioned BWPs within the initial BWPs, each set of CORESETs and search spaces being formed by one CORESET and a common search space configured on the CORESET;

alternatively, CORESET and search space are respectively configured for each partitioned BWP.

A second aspect of the present application provides a method for transmitting a broadcast service in an NR cell, which is applied to a communication system, where the communication system includes a base station and a UE, and the method includes:

for any broadcast service transmitted in an NR cell, a base station selects one BWP from the divided BWPs for broadcast service transmission, transmits the broadcast service in a point-to-multipoint PTM bearer, generates PTM configuration information of the broadcast service, and for a UE reporting a Radio Resource Control (RRC) connection state interested in the broadcast service, if the UE cannot receive the broadcast service through an activated DL BWP, the base station either reconfigures the activated DL BWP of the UE, or establishes a PTP bearer for the UE, or configures a secondary PTM bearer for the UE, and correspondingly, the base station generates BWP reconfiguration information, PTP bearer configuration information and secondary PTM bearer configuration information of the broadcast service.

The base station sends PTM configuration information of the broadcast service in an NR cell through a single cell multicast control channel SC-MCCH, and for reporting RRC connection state UE interested in the broadcast service, the base station transmits related information to the UE through a special signaling;

the UE receives the SC-MCCH or the special signaling and executes corresponding processing;

the base station adopts corresponding bearing to send the broadcast service;

and the UE receives the broadcast service through the corresponding bearer.

Optionally, for reporting the RRC-connected UE interested in the broadcast service, the base station transmits related information to the UE through dedicated signaling, including:

if the UE can receive the broadcast service through the activated DL BWP, the base station sends the PTM configuration information of the broadcast service to the UE through dedicated signaling;

or if the DL BWP activated by the UE is reconfigured to receive the broadcast service transmitted with the PTM bearer, the base station sends the PTM configuration information of the broadcast service and the corresponding DL BWP reconfiguration information to the UE through dedicated signaling;

or if the base station establishes a PTP bearer on the activated DL BWP of the UE to transmit the broadcast service to the UE, the base station transmits PTP bearer configuration information to the UE through dedicated signaling;

Or if the base station transmits the broadcast service to the UE in PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and DL BWP reconfiguration information to the UE through dedicated signaling;

or if the base station configures one or more auxiliary PTM bearers for transmitting the broadcast service, for each auxiliary PTM bearer, for a UE adopting the auxiliary PTM bearer to receive the broadcast service, if the auxiliary PTM bearer is located on an activated DL BWP of the UE, the base station transmits configuration information of the auxiliary PTM bearer to the UE through dedicated signaling, and if the auxiliary PTM bearer is not located on the activated BWP of the UE, the base station transmits configuration information of the auxiliary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

Optionally, the UE receives the SC-MCCH or the dedicated signaling and performs corresponding processing, including:

when the UE is RRC idle state/RRC inactive state UE, the UE receives corresponding system information to obtain configuration information of the SC-MCCH, receives corresponding SC-MCCH, obtains PTM configuration information of the broadcast service from the SC-MCCH, establishes corresponding PTM bearing according to the PTM configuration information of the broadcast service, and is used for receiving the broadcast service;

When the UE is RRC connection UE which is interested in the broadcast service, if the special signaling only comprises the PTM configuration information of the broadcast service, the UE establishes a corresponding PTM bearer according to the PTM configuration information of the broadcast service and is used for receiving the broadcast service;

or when the UE is an RRC-connected UE that reports the broadcast service interest, if the dedicated signaling includes PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the UE reconfigures the DL BWP according to the DL BWP reconfiguration information, and the UE receives the existing service on the reconfigured activated DL BWP and establishes a corresponding PTM bearer on the reconfigured activated DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service.

Or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTP bearer configuration information, the UE establishes a PTP bearer for receiving the broadcast service on the activated DL BWP according to the PTP bearer configuration information, and receives the broadcast service through the PTP bearer.

Or when the UE is an RRC-connected UE that reports the broadcast service interest, if the dedicated signaling includes PTP bearer configuration information and the DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives an existing service on the reconfigured activated DL BWP, and establishes a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information on the reconfigured activated DL BWP, and receives the broadcast service through the PTP bearer.

Or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes auxiliary PTM configuration information of the broadcast service, the UE establishes a corresponding auxiliary PTM bearer on the activated DL BWP according to the auxiliary PTM configuration information, and is configured to receive the broadcast service.

Or when the UE is an RRC-connected UE that reports the broadcast service interest, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the UE reconfigures the DL BWP according to the DL BWP reconfiguration information, receives the existing service on the reconfigured activated DL BWP, and establishes a corresponding secondary PTM bearer on the reconfigured activated DL BWP according to the secondary PTM bearer configuration information, so as to receive the broadcast service.

Optionally, the base station sends the broadcast service by adopting a corresponding bearer, including:

the base station sends the broadcast service on the corresponding DL BWP through PTM bearing according to the PTM configuration information of the broadcast service

Or, for the UE receiving the broadcast service through the PTP bearer, the base station sends the broadcast service through the PTP bearer on the corresponding DL BWP according to the configuration information of the PTP bearer configured for the UE;

Or when the base station configures the auxiliary PTM bearer, the base station sends the broadcast service on the corresponding DL BWP through the auxiliary PTM bearer according to the configuration information of each auxiliary PTM bearer;

optionally, the UE receives the broadcast service through a corresponding bearer, including:

for RRC idle state/RRC inactive state UE, the UE receives the broadcast service through PTM bearing;

for RRC connection UE, when the special signaling includes PTM configuration information of the broadcast service, the UE receives the broadcast service through PTM bearing;

or for RRC connection UE, when the dedicated signaling comprises PTP bearer configuration information, the UE receives the broadcast service through the PTP bearer;

or for the RRC connection state UE, when the special signaling comprises the auxiliary PTM bearer configuration information, the UE receives the broadcast service through the auxiliary PTM bearer.

Optionally, the method further comprises:

and the base station sends configuration information carried by each auxiliary PTM of the broadcast service through the SC-MCCH.

Optionally, the method further comprises:

the RRC connection state UE interested in the broadcast service reports the information of the broadcast service and the RF capability of the UE interested in the UE to the base station if the broadcast service cannot be received through the existing configured PTM bearer or auxiliary PTM bearer;

And if the UE in the RRC idle state/RRC inactive state interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer or auxiliary PTM bearer, reporting the information of the interested broadcast service and the RF capability of the UE to the base station by the UE.

A third aspect of the present application provides a method for transmitting a multicast service in an NR cell, which is applied to a communication system, where the communication system includes a base station and a UE, and the method includes:

for any one NR cell, the base station determines BWPs for transmitting multicast traffic, preferentially configures each of said BWPs in the area M of the cell, configures CORESET and search space on each BWP

According to a first message from a core network, a base station determines multicast service to be transmitted, and according to a UE list in the message, the base station determines each NR cell for transmitting the multicast service, when at least one UE in one NR cell is located in the UE list, the cell needs to transmit the multicast service, and the first message is a request message for establishing the multicast service;

the base station selects BWP for sending the multicast service in each cell transmitting the multicast service and generates relevant configuration information;

The base station sends the relevant configuration information to each UE receiving the multicast service through a special signaling;

the UE receives the special signaling sent by the base station, and establishes a corresponding bearer for receiving the multicast service according to the special signaling;

the base station transmits the multicast service through the corresponding bearer in the NR cell;

and the UE receives the multicast service through the corresponding bearer.

Optionally, the base station sends the relevant configuration information to each UE receiving the multicast service through dedicated signaling, including:

if the UE can receive the multicast service by activating DL BWP, the base station sends the PTM configuration information of the multicast service to the UE through dedicated signaling;

or if DL BWP of the UE is reconfigured to receive the multicast service transmitted with PTM bearer, the base station sends PTM configuration information of the multicast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

or if the base station transmits the multicast service to the UE in PTP bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through dedicated signaling;

or if the base station transmits the multicast service to the UE in PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

Or if the base station configures one or more auxiliary PTM bearers for transmitting the multicast service, for each auxiliary PTM bearer, for a UE that adopts the auxiliary PTM bearer to receive the multicast service, if the auxiliary PTM bearer is located on an active BWP of the UE, the base station transmits configuration information of the auxiliary PTM bearer to the UE through dedicated signaling, and if the auxiliary PTM bearer is not located on the active DL BWP of the UE, the base station transmits configuration information of the auxiliary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

A fourth aspect of the present application provides a method of configuring active BWP and inactive BWP, comprising:

a plurality of common BWPs are preconfigured, and each common BWP corresponds to one service type or a plurality of service types;

the general BWP is preferentially configured to the UE or the special BWP is preferentially configured to the UE, each of which includes a frequency interval for transmitting the broadcast service or one of the secondary BWPs.

A fifth aspect of the present application provides an apparatus for configuring MBS resources in an NR cell, including:

a first determining module for determining a frequency interval for broadcast traffic transmission according to a predicted bandwidth for broadcast traffic transmission, the frequency interval including an initial bandwidth portion BWP;

A dividing module, configured to divide the frequency interval into one or more BWP, and configure a control resource set CORESET and a search space on each of the divided BWP, where the CORESET and the search space are used to send scheduling information of a broadcast service transmitted on a corresponding BWP;

a second determining module, configured to determine, for each radio frequency RF level, a frequency range for active/inactive DL BWP configuration, where when an active/inactive DL BWP configured for a user equipment UE is located in a frequency range corresponding to the RF level of the UE and includes the frequency range for transmitting broadcast services, the UE may receive any one broadcast service while receiving unicast services;

a third determining module, configured to, in order to ensure that the UE receives the broadcast service while receiving the unicast service, configure frequency resources for the multicast service in an area outside the frequency range corresponding to the maximum RF level, or set reserved areas on the left side and the right side of the frequency range corresponding to the maximum RF level, respectively, and configure frequency resources for the multicast service in the frequency range corresponding to the maximum RF level and the area outside the reserved areas;

a compression module, configured to compress the frequency interval to a bandwidth corresponding to the frequency interval being not greater than a maximum bandwidth supported by the UE with the smallest radio frequency level under a condition of ensuring that the frequency interval includes the initial BWP when the bandwidth corresponding to the frequency interval for transmitting the broadcast service is greater than the maximum bandwidth supported by the UE with the smallest radio frequency level, and simultaneously configure one or more secondary BWP in the carrier frequency bandwidth for transmitting the broadcast service, and broadcast configuration information of each secondary BWP on the initial BWP;

A processing module, configured to determine, for each secondary BWP, a frequency range for active/inactive DL BWP configuration for each RF level in order to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, and when an active BWP configured for the UE is located within a frequency range corresponding to the RF level of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

Optionally, the first determining module is specifically configured to predict a bandwidth for broadcast service transmission; on the premise that the initial BWP is used for transmitting broadcast services, determining the bandwidth which can be actually used for transmitting the broadcast services on the whole initial BWP; a frequency interval within the cell for broadcast service transmission is determined.

Optionally, the dividing module is specifically configured to uniformly configure one or more sets of CORESET and search space for each BWP of the division in the initial BWP, where each set of CORESET and search space is formed by one CORESET and one common search space configured on the CORESET; alternatively, CORESET and search space are respectively configured for each partitioned BWP.

A sixth aspect of the present application provides a transmission system of a broadcast service in an NR cell, the system comprising:

a base station, configured to select, for any one broadcast service transmitted in an NR cell, one BWP from among the divided bwtps for broadcast service transmission, to transmit the broadcast service in a point-to-multipoint PTM bearer, and generate PTM configuration information of the broadcast service, and for a UE reporting a radio resource control RRC connected state of interest to the broadcast service, if it cannot receive the broadcast service through an activated DL BWP, the base station either reconfigures the activated DL BWP of the UE, or establishes a PTP bearer for the UE, or configures an auxiliary PTM bearer for the UE, and accordingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and auxiliary PTM bearer configuration information of the broadcast service;

the base station is further configured to send PTM configuration information of the broadcast service in an NR cell through a single cell multicast control channel SC-MCCH, and for reporting RRC connected UEs interested in the broadcast service, the base station transmits related information to the UEs through dedicated signaling;

the UE is used for receiving the SC-MCCH or the special signaling and executing corresponding processing;

The base station is further configured to send the broadcast service by adopting a corresponding bearer;

the UE is further configured to receive the broadcast service through a corresponding bearer.

Optionally, the base station is specifically configured to, for reporting an RRC-connected UE interested in the broadcast service, send PTM configuration information of the broadcast service to the UE through dedicated signaling if the UE is capable of receiving the broadcast service through activated DL BWP;

or if DL BWP of the UE is reconfigured to receive the broadcast service transmitted with PTM bearer, transmitting PTM configuration information of the broadcast service and corresponding DL BWP reconfiguration information to the UE through dedicated signaling;

or if the base station establishes a PTP bearer on the activated DL BWP of the UE to transmit the broadcast service to the UE, transmitting PTP bearer configuration information to the UE through dedicated signaling;

or if the base station transmits the broadcast service to the UE in PTP bearer on the reconfigured activated DL BWP, transmitting PTP bearer configuration information and DL BWP reconfiguration information to the UE through dedicated signaling;

or if the base station configures one or more auxiliary PTM bearers for transmitting the broadcast service, for each auxiliary PTM bearer, for a UE adopting the auxiliary PTM bearer to receive the broadcast service, if the auxiliary PTM bearer is located on an activated DL BWP of the UE, transmitting configuration information of the auxiliary PTM bearer to the UE through dedicated signaling, and if the auxiliary PTM bearer is not located on the activated BWP of the UE, transmitting configuration information of the auxiliary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling by the base station.

Optionally, the UE is specifically configured to, when the UE is an RRC idle state/RRC inactive state UE, receive a corresponding system message to obtain configuration information of the SC-MCCH, and receive a corresponding SC-MCCH, obtain PTM configuration information of the broadcast service from the SC-MCCH, and establish a corresponding PTM bearer according to the PTM configuration information of the broadcast service, so as to receive the broadcast service;

when the UE is RRC connection UE which is interested in the broadcast service, if the special signaling only comprises the PTM configuration information of the broadcast service, establishing a corresponding PTM bearer according to the PTM configuration information of the broadcast service, and receiving the broadcast service;

or when the UE is an RRC-connected UE that reports the broadcast service interest, if the dedicated signaling includes PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives an existing service on the reconfigured activated DL BWP, and establishes a corresponding PTM bearer on the reconfigured activated DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service.

Or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTP bearer configuration information, a PTP bearer for receiving the broadcast service is established on the activated DL BWP according to the PTP bearer configuration information, and the broadcast service is received through the PTP bearer.

Or when the UE is an RRC-connected UE that reports the broadcast service interest, if the dedicated signaling includes PTP bearer configuration information and the DL BWP reconfiguration information, the DL BWP is reconfigured according to the DL BWP reconfiguration information, the existing service is received on the reconfigured activated DL BWP, and a PTP bearer for receiving the broadcast service is established on the reconfigured activated DL BWP according to the PTP bearer configuration information, and the broadcast service is received through the PTP bearer.

Or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes auxiliary PTM configuration information of the broadcast service, a corresponding auxiliary PTM bearer is established on the activated DL BWP according to the auxiliary PTM configuration information, and is used for receiving the broadcast service.

Or when the UE is an RRC-connected UE that reports the broadcast service interest, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the DL BWP is reconfigured according to the DL BWP reconfiguration information, the existing service is received on the reconfigured activated DL BWP, and a corresponding secondary PTM bearer is established on the reconfigured activated DL BWP according to the secondary PTM bearer configuration information, so as to receive the broadcast service.

Optionally, the base station is specifically configured to send the broadcast service on the corresponding DL BWP through a PTM bearer according to the PTM configuration information of the broadcast service

Or, for the UE receiving the broadcast service through the PTP bearer, the broadcast service is sent through the PTP bearer on the corresponding DL BWP according to the configuration information of the PTP bearer configured for the UE;

or when the base station configures the auxiliary PTM bearer, according to the configuration information of each auxiliary PTM bearer, sending the broadcast service on the corresponding DL BWP through the auxiliary PTM bearer;

optionally, the UE is specifically configured to receive, for an RRC idle state/RRC inactive state UE, the broadcast service through a PTM bearer;

for RRC connection UE, when the special signaling includes PTM configuration information of the broadcast service, the broadcast service is received through PTM bearing;

or for RRC connection UE, when the dedicated signaling comprises PTP bearer configuration information, receiving the broadcast service through the PTP bearer;

or for the RRC connection state UE, when the special signaling comprises the configuration information of the auxiliary PTM bearer, the broadcast service is received through the auxiliary PTM bearer.

Optionally, the base station is further configured to send configuration information carried by each auxiliary PTM of the broadcast service through the SC-MCCH.

Optionally, the UE is further configured to report, to the base station, information of the broadcast service of interest and RF capability of the UE, if the UE in RRC connected state interested in the broadcast service cannot receive the broadcast service through an existing configured PTM bearer and an auxiliary PTM bearer;

and if the UE in the RRC idle state/RRC inactive state interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer or auxiliary PTM bearer, reporting the information of the interested broadcast service and the RF capability of the UE to the base station.

A seventh aspect of the present application provides a transmission system of multicast traffic in an NR cell, the system comprising:

a base station for determining, for any one of the NR cells, the BWP for transmitting the multicast service, preferentially configuring each of said BWP in the area M of the cell, and configuring CORESET and search space on each BWP

The base station is further configured to determine, according to a first message from a core network, a multicast service to be transmitted, and determine, according to a UE list in the message, each NR cell that transmits the multicast service, where when at least one UE in one NR cell is located in the UE list, the cell needs to transmit the multicast service, where the first message is a request message for establishing the multicast service;

The base station is further configured to select, in each cell transmitting the multicast service, a BWP for transmitting the multicast service, and generate relevant configuration information;

the base station is further configured to send relevant configuration information to each UE receiving the multicast service through dedicated signaling;

the UE is used for receiving the special signaling sent by the base station and establishing a corresponding bearer according to the special signaling for receiving the multicast service;

the base station is further configured to send the multicast service in an NR cell through a corresponding bearer;

the UE is further configured to receive the multicast service through a corresponding bearer.

Optionally, the base station is specifically configured to

An eighth aspect of the present application provides an apparatus for configuring an active BWP and an inactive BWP, comprising:

a configuration module, configured to pre-configure a plurality of ordinary BWP, where each ordinary BWP corresponds to one service type or multiple service types;

an allocation module for preferentially configuring a common BWP to the UE or preferentially configuring a special BWP to the UE, each of the special BWP including a frequency interval for transmitting broadcast traffic or including one of the secondary BWPs.

A ninth aspect of the present application provides an electronic device, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executes the computer-executable instructions stored by the memory to cause the electronic device to perform the method described above.

A tenth aspect of the present application provides a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement the above-described method.

The embodiment of the application provides a method and a device for configuring and using MBS resources in an NR cell, which are used for determining a frequency interval for transmitting broadcast service according to a predicted bandwidth for transmitting the broadcast service, wherein the frequency interval comprises an initial bandwidth part BWP; dividing the frequency interval into one or more BWPs, and configuring a control resource set CORESET and a search space on each divided BWP, wherein the CORESET and the search space are used for transmitting scheduling information of broadcast services transmitted on the corresponding BWP; for each radio frequency RF level, determining a frequency range for active/inactive DL BWP configuration, and when the active/inactive DL BWP configured for the user equipment UE is located within the frequency range corresponding to the RF level of the UE and includes a frequency interval for transmitting broadcast services, the UE may receive any one broadcast service while receiving unicast service; in order to ensure that the UE receives the broadcast service while receiving the unicast service, frequency resources are configured for the multicast service in an area outside a frequency range corresponding to the maximum RF level, or reserved areas are respectively arranged on the left side and the right side of the frequency range corresponding to the maximum RF level, and frequency resources are configured for the multicast service in the frequency range corresponding to the maximum RF level and the area outside the reserved areas; when the bandwidth corresponding to the frequency interval for transmitting the broadcast service is larger than the maximum bandwidth supported by the UE with the minimum radio frequency grade, under the condition of ensuring that the frequency interval includes the initial BWP, compressing the frequency interval to the bandwidth corresponding to the frequency interval to be not larger than the maximum bandwidth supported by the UE with the minimum radio frequency grade, and simultaneously configuring one or more auxiliary BWPs in the carrier frequency bandwidth for transmitting the broadcast service, and broadcasting configuration information of each auxiliary BWP on the initial BWP; for each secondary BWP, in order to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, a frequency range for active/inactive DL BWP configuration is determined for each RF level, and when the active BWP configured for the UE is located within the frequency range corresponding to the RF level of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast. By the method, the UE in various states can receive corresponding broadcast services and multicast services.

Drawings

FIG. 1 is a schematic diagram of an MBS system architecture according to an embodiment of the present application;

fig. 2 is a flow chart of a method for configuring MBS resources in an NR cell according to an embodiment of the present application;

fig. 3 is a schematic configuration diagram of MBS resources in an NR cell according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating the division of BWP in broadcast service transmission according to an embodiment of the present application;

FIG. 5a is a schematic diagram of a configuration CORESET and search space provided in an embodiment of the present application;

FIG. 5b is a schematic diagram of another configuration CORESET and search space provided by an embodiment of the present application;

fig. 6 is a signaling interaction diagram of a method for sending a broadcast service in an NR cell according to an embodiment of the present application;

fig. 7 is a signaling interaction diagram of a method for sending a multicast service in an NR cell according to an embodiment of the present application;

fig. 8 is a flow chart of a method for configuring active BWP and inactive BWP according to an embodiment of the present application;

fig. 9 is a flowchart of another resource allocation method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a resource allocation device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described in the following in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to solve the above problems, the present application provides a method and apparatus for configuring and using MBS resources in an NR cell, so as to allocate resources to MBS in the NR cell, and provide broadcast services and multicast services to UEs in various states in the NR cell based on the allocated resources.

The application scenario of the present application will be first described below.

Fig. 1 is a schematic diagram of an MBS system architecture according to an embodiment of the present application. As shown in fig. 1, the MBS system includes: user equipment 101, an access network (gNB) 102, a 5G core network 103, and MBS servers. Wherein the MBS server provides a broadcast/multicast service. The 5G core network provides a user plane data transmission path and a control plane information transmission path for the broadcast/multicast service from the MBS server, and transmits the user plane data and the control plane information of the broadcast/multicast service to the gNB through the two paths respectively. The gNB determines an NR cell for transmitting the broadcast/multicast service according to the control plane information of the broadcast/multicast service from the core network, the broadcast/multicast service is transmitted in the corresponding NR cell, and the UE receives the broadcast/multicast service in the NR cell according to the self requirement.

It should be understood that the system architecture shown in fig. 1 is not limiting of the present application.

The technical solutions of the embodiments of the present application are described in detail below with specific embodiments. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

It should be noted that, the order of the steps is not limited in the embodiment of the present application.

Fig. 2 is a flow chart of a method for configuring MBS resources in an NR cell according to an embodiment of the present application, where the embodiment relates to a specific process of how a network device allocates resources to an MBS in an NR cell, as shown in fig. 2, where the method includes:

s201, the base station determines a frequency interval for broadcast service transmission according to the predicted bandwidth for broadcast service transmission, wherein the frequency interval includes the initial BWP.

Specifically, as shown in fig. 3, the method for determining the frequency interval by the base station is as follows:

s11: the base station determines a bandwidth L for broadcast traffic transmission, the unit of L being MHz.

Specifically, the base station may determine the bandwidth L of the broadcast service according to the type of broadcast service provided in the NR cell and the number of broadcast services of each type. The unit of L is: MHz.

S12: on the premise that the initial BWP is used to transmit the broadcast service, a bandwidth B that can be actually used for transmission of the broadcast service on the entire initial BWP is determined. The unit of B is: MHz.

Since the initial BWP uses part of the downlink resources for transmitting SS/PBCH Block, system message, and paging message, and needs to provide the downlink resources for the UE to access the cell, the bandwidth B < a actually usable for broadcast traffic transmission on the entire initial BWP even though the entire initial BWP is used for broadcast traffic transmission. A is the bandwidth of the initial BWP, and a is in units of: MHz.

S13: a frequency interval within the cell for broadcast service transmission is determined. The frequency interval is denoted by [ F1, F2], F1 and F2 being the start and end positions of the frequency interval, respectively. The frequency interval includes the initial BWP.

Specifically, the frequency interval [ F1, F2] is determined as follows:

let [ f1, f2] denote the frequency interval corresponding to the initial BWP, f1 and f2 being the start position and the end position of the initial BWP, respectively, the length of the frequency interval being a (MHz).

If L is less than or equal to B, setting a frequency interval [ F1, F2] for broadcast service transmission in a cell as [ F1, F2], namely: when l.ltoreq.b, the frequency interval for broadcast traffic transmission is composed of just the initial BWP, and only using the resources on the initial BWP is sufficient to satisfy the demand for transmission of broadcast traffic within the cell.

Otherwise, the bandwidths corresponding to the frequency intervals [ F1, F2] are: l+ (A-B), the unit of bandwidth is: MHz, and this frequency interval includes the initial BWP, namely: the frequency interval satisfies the following equation:

F1≤f1，F2≥f2，F2-F1＝L+(A-B)。

s202, dividing the frequency interval into one or more BWP. A control resource set CORESET and a search space for transmitting scheduling information of a broadcast service transmitted on the BWP are configured on each divided BWP.

A method of dividing BWP within the frequency interval is shown in fig. 4.

When the frequency interval consists of an initial BWP, the interval is divided into only 1 BWP, which is the initial BWP.

When at least two BWP are divided in the frequency interval, if there is a nested relationship between the two BWP (i.e., one BWP is contained in the other BWP), the bandwidth difference between the two BWP is not less than TH, which is a threshold, in units of: MHz. The determination method of TH is as follows:

the power consumption of the UE is P (X) on BWP with bandwidth X, and P (x+th) on BWP with bandwidth (x+th), and TH takes the values: p (x+th) is significantly greater than P (X), such as: (P (x+th) -P (X))/P (X) > TH, th=10%, 20%,30%.

When L-B < TH, the interval is divided into only 1 BWP, which is composed of the entire frequency interval.

When L-B > =th, the interval is divided into 1 or more BWP. Referring to fig. 4, the specific method is as follows:

when F2-F2< TH and F1-F1< TH, only one BWP is divided, which is composed of the entire frequency range.

When F2-F2> =th and F1-F1< TH, a BWP is first divided, and the BWP has a starting position of F1 and a final position of F2. The BWP is denoted by the number 0.

When F1-F1> =th and F2-F2< TH, a BWP is first divided, and the BWP has a starting position of F1 and an ending position of F2. The BWP is denoted by the number 0.

When F2-F2> =th and F1-F1> =th, one BWP is first divided, and the BWP is the initial BWP. The BWP is denoted by the number 0.

When F2-F2> =th, the frequency range is divided into K1 BWP with F1 as the start point and F2 as the end point:

starting from F2, in the direction of F2, dividing the frequency resource between F2 and F2 into K1 segments, wherein the end point of the K segments is: d1 (K), k=1, …, K1, d1 (K1) =f2. The length of each segment is not less than TH, but less than 2TH. In fig. 4, k1=3.

The K-th BWP of the division starts with f1 and ends with d1 (K), k=1, …, K1. The bandwidth difference between two adjacent BWPs is not smaller than TH, and the division can effectively reduce the power consumption of the UE side.

The kth BWP is denoted by the number k.

When F1-F1> =th, the frequency range is divided into K2 BWP with F1 as the start and F2 as the end:

starting from F1, towards the direction of F1, dividing the frequency resource between F1 and F1 into K2 segments, wherein the end point of the K segments is: d2 (K), k=1, …, K2, d2 (K2) =f1. The length of each segment is not less than TH, and is less than 2TH at the time. In fig. 4, k2=2.

The K-th BWP of the division starts with d2 (K) and ends with f2, k=1, …, K2. The bandwidth difference between two adjacent BWPs is not smaller than TH, and the division can effectively reduce the power consumption of the UE side.

The kth BWP is denoted by the number (k1+k).

After the BWP is divided, CORESET and a search space are configured for each BWP for carrying scheduling information of broadcast services transmitted within the BWP. There are two methods of configuring CORESET and search space for each BWP, as follows.

The method comprises the following steps: as shown in fig. 5a, one or more sets of CORESET and search space are uniformly configured for each partitioned BWP within the initial BWP. Each set of CORESET and search space is made up of one CORESET and a common search space configured on the CORESET. The partitioned BWP groups share a uniform configuration of CORESET and search space.

Preferably, each uniformly configured CORESET may multiplex the frequency resources occupied by CORESET0, the frequency resources occupied by CORESET for system messages on the initial BWP, and the frequency resources occupied by CORESET for paging messages on the initial BWP.

The second method is as follows: as shown in fig. 5b, CORESET and search space are respectively configured for each partitioned BWP.

When only one BWP is divided, CORESET and search space are configured on the initial BWP.

When a plurality of BWP are divided, CORESET and search space are configured on the initial BWP for the BWP with number 0.

When F2-F2> =th, for K1 BWP divided in the frequency range [ F1, F2], CORESET and search space are configured for BWP of number 1 in a region where the BWP does not overlap with the initial BWP. The BWP corresponding to the broadcast service transmitted in the non-overlapping region is BWP1. For each BWP starting from number 2, CORESET and search space are configured in a region where the BWP does not overlap with the previous BWP, and the BWP corresponding to the broadcast service transmitted in the non-overlapping region is the BWP.

When F1-F1> =th, the same processing is adopted for K2 BWP divided in the frequency range [ F1, F2 ]: for BWP with number k1+1, CORESET and search space are configured for the BWP in a region where the BWP does not overlap with the initial BWP. The BWP corresponding to the broadcast service transmitted in the non-overlapping region is the BWP. For each BWP with a number of k1+2, CORESET and a search space are configured in a region where the BWP does not overlap with a previous BWP, and the BWP corresponding to the broadcast service transmitted in the non-overlapping region is the BWP.

One or more sets of CORESETs and search spaces may also be configured within each non-overlapping region, each set of CORESETs and search spaces being formed by a CORESET and a common search space configured on the CORESET. Each set of CORESET and search space is used to carry scheduling information for broadcast traffic transmitted in the non-overlapping region.

S203, for each RF level, a frequency range for active/inactive DL BWP configuration is determined, and when the active/inactive DL BWP configured for the UE is located within the frequency range corresponding to the RF level of the UE and includes a frequency interval for transmitting broadcast services, the UE may receive any one broadcast service while receiving unicast service.

The unicast service described above is used to represent a normal service of non-MBS transmitted in the downlink direction in the NR cell. The logical, transport and physical channels employed by these services are DTCH, DL-SCH and PDSCH, respectively.

In an NR cell, the RF capability of a UE may be divided into a plurality of levels according to the maximum bandwidth that the RF of the UE can support, and the number of RF capability levels of the UE is denoted by N. The maximum bandwidths supported by the nth RF capability class are expressed by w (n) in MHz, and the respective RF classes are ordered in order of decreasing maximum bandwidths supported by the RF, and are shown in MHz.

In order for the UE to receive the broadcast service while receiving the unicast service, the active/inactive DL BWP configured to the UE should include a frequency interval for transmitting the broadcast service. As shown in fig. 3, for a UE with RF capability level n, the UE should be configured with active/inactive DL BWP within the frequency range [ F2-w (n), f1+w (n) ] and the start position of the active/inactive DL BWP configured to the UE is within the frequency interval [ F2-w (n), F1], and the end position is within the frequency interval [ F2, f1+w (n) ]. However, if the bandwidth (F2-F1) corresponding to the frequency range for transmitting the broadcast service is greater than w (n), the active/inactive DL BWP configured to the UE cannot include the entire frequency range for transmitting the broadcast service. In this scenario, the UE can receive only a part of the broadcast traffic while receiving the unicast traffic. For broadcast services that the UE cannot receive, either the UE is transmitted over PTP bearers on the active DL BWP of the UE, or the UE is transmitted over an additionally established PTM bearer on the active DL BWP of the UE, or the active DL BWP of the UE is reconfigured so that the UE can receive the corresponding broadcast services on the new active DL BWP.

S204, in order to ensure that the UE receives the broadcast service while receiving the unicast service, frequency resources are allocated to the multicast service in an area outside the frequency range [ F2-w (N), f1+w (N) ] as much as possible, as shown in fig. 3. Further, reserved area 1 and reserved area 2 are set on the left side and right side of frequency range [ F2-w (N), f1+w (N) ] respectively, bandwidths of the two areas are G1 and G2 respectively, and frequency resources are allocated to multicast service in the areas outside the frequency range [ F2-w (N) -G1, f1+w (N) +g2 ]. The frequency resources for multicast traffic are denoted by area M.

S205, when the bandwidth (F2-F1) corresponding to the frequency interval [ F1, F2] for transmitting the broadcast service is greater than w (1), compressing the frequency interval until the bandwidth (F2-F1) corresponding to the frequency interval is not greater than w (1) under the condition of ensuring that the frequency interval includes the initial BWP, and simultaneously configuring one or more auxiliary BWP for transmitting the broadcast service within the carrier frequency bandwidth. The configuration information of each secondary BWP is broadcast on the initial BWP.

Specifically, SIB1, other necessary SIBs, paging messages, and SC-MCCH are broadcast on each secondary BWP. After the UE camps on the cell, the information that the UE can obtain on the initial BWP can be obtained on the secondary BWP, so that the UE does not affect the UE camping on the cell while receiving the corresponding broadcast service on the secondary BWP, does not affect the UE receiving the system message and paging message on the cell, and does not affect the UE initiating the service request on the cell.

In order for the UE of rrc_idle/rrc_inactive to be able to receive the broadcast service on each secondary BWP, configuration information of each secondary BWP is broadcast on the initial BWP. Specifically, configuration information of each secondary BWP is broadcast through the newly added SIB/SC-MCCH on the initial BWP. Of course, the configuration information of each secondary BWP may also be broadcast through the SIB broadcasting the configuration information of each BWP in the current cell.

S206, for each secondary BWP, to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, a frequency range for active/inactive DL BWP configuration is determined for each RF level, and when the active BWP configured for the UE is located within the frequency range corresponding to the RF level of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

In order for the UE to receive broadcast traffic transmitted in the frequency interval F1, F2 while receiving unicast traffic, an active/inactive DL BWP (or inactive BWP) configured for the UE should include the frequency interval F1, F2. Similarly, in a scenario where the secondary BWP is configured, in order for the UE to receive broadcast traffic transmitted on a certain secondary BWP while receiving unicast traffic, the active/inactive DL BWP configured for the UE should include the secondary BWP.

Specifically, the frequency interval corresponding to the secondary BWP is denoted by [ SF1, SF2], for a UE having an RF capability level of n, an active/inactive DL BWP should be configured for the UE within the frequency range [ SF2-w (n), SF1+ w (n) ], and the start position of the active/inactive DL BWP configured for the UE is within the frequency interval [ SF2-w (n), SF1], and the end position is within the frequency interval [ SF2, SF1+ w (n) ]. Preferably, each secondary BWP is configured for broadcast traffic within the region M. Preferably, resources are preferentially configured for each secondary BWP and the active/inactive DL BWP corresponding to each secondary BWP within the region M, and then resources are configured for multicast traffic.

As shown in fig. 3, in the method proposed in the embodiment of the present application, the carrier frequency bandwidth of the NR cell is W (MHz). The carrier frequency bandwidth range is denoted by 0, w.

The base station determines a frequency interval [ F1, F2] for broadcast service transmission, which includes an initial BWP, according to an expected bandwidth for broadcast service transmission in order for rrc_idle/rrc_ INACITVE state UE to be able to detect SS/PBCH block, system message of a listening cell, and paging message as usual while receiving broadcast service. The frequency interval corresponding to the initial BWP is [ f1, f2].

In order to avoid the bandwidth of BWP carrying broadcast service from being greater than the RF capability of UE as much as possible, and to reduce the power consumption of UE as much as possible, the frequency interval for broadcast service transmission described above may be divided into 1 or more BWP, each including initial BWP, and each having a bandwidth as much as possible not greater than w (N), which is the maximum bandwidth supported by UE with the largest RF capability level in NR cell, and having a bandwidth as much as possible not greater than w (1), which is the maximum bandwidth supported by UE with the smallest RF capability level in NR cell. When the above frequency range is divided into a plurality of BWP, any one broadcast service transmitted in the NR cell is transmitted only on a certain divided BWP, and a UE receiving the broadcast service only needs to operate on the BWP transmitting the service, not necessarily within the entire frequency range, and thus power consumption of the UE can be effectively reduced.

In order for the UE to receive broadcast traffic while receiving unicast traffic, the active/inactive DL BWP configured to the UE should include a frequency range for transmitting broadcast traffic. As shown in fig. 3, for a UE with RF capability level n, an active/inactive BWP should be configured for the UE within the frequency range [ F2-w (n), f1+w (n) ] and the start position of an active/inactive DL BWP configured for the UE is within the frequency interval [ F2-w (n), F1] and the end position is within the frequency interval [ F2, f1+w (n) ]. However, if the bandwidth (F2-F1) corresponding to the frequency range for transmitting the broadcast service is greater than w (n), the active/inactive DL BWP configured to the UE cannot include the entire frequency range for transmitting the broadcast service. In this scenario, the UE can receive only a part of the broadcast traffic while receiving the unicast traffic. For broadcast services that the UE cannot receive, either the UE is transmitted over PTP bearers on the active BWP of the UE, or the UE is transmitted over an additionally established PTM bearer on the active BWP of the UE, or the active BWP of the UE is reconfigured so that the UE can receive the corresponding broadcast services on the new active BWP.

In order to ensure that the UE receives the broadcast service while receiving the unicast service as much as possible, as shown in fig. 3, frequency resources are allocated to the multicast service in an area outside the frequency range [ F2-w (N), f1+w (N) ] as much as possible. Further, reserved area 1 and reserved area 2 are respectively set on the left side and the right side of frequency range [ F2-w (N), f1+w (N) ] for configuring frequency resources for unicast service of UE, and bandwidths of the two reserved areas are G1 and G2 respectively. Frequency resources are allocated to multicast traffic in areas outside the frequency range F2-w (N) -G1, f1+w (N) +g2. The frequency resources for multicast traffic are denoted by area M.

In the above method, for a UE having an RF capability level of n rrc_idle/rrc_inactive state, when a bandwidth (F2-F1) corresponding to a frequency interval for transmitting broadcast traffic is greater than w (n), the UE cannot receive all broadcast traffic. In this scenario, in order for a UE of various RF capability levels rrc_idle/rrc_inactive state to receive all broadcast traffic while camping on a cell, a frequency interval [ F1, F2] for transmitting the broadcast traffic may be compressed such that a bandwidth (F2-F1) corresponding to the frequency interval is not greater than w (1), while one or more secondary BWP is configured within a carrier frequency bandwidth for transmitting the broadcast traffic, each secondary BWP having a bandwidth not greater than w (1). SIB1, other necessary SIBs, paging messages, and SC-MCCH are broadcast on each secondary BWP. After the UE camps on the cell, information that the UE can obtain on the initial BWP can be obtained on the secondary BWP, and thus the UE does not affect the camping of the UE on the cell while receiving the corresponding broadcast service on the secondary BWP. In order for the UE of rrc_idle/rrc_inactive state to be able to receive broadcast traffic on each secondary BWP, configuration information of each secondary BWP is broadcast on the initial BWP. Specifically, configuration information of each secondary BWP is broadcast through the newly added SIB/SC-MCCH on the initial BWP.

In order for the UE to receive broadcast traffic transmitted in the frequency interval F1, F2 while receiving unicast traffic, the active/inactive DL BWP configured for the UE should include the frequency interval F1, F2. Similarly, in a scenario where the secondary BWP is configured, in order for the UE to receive broadcast traffic transmitted on a certain secondary BWP while receiving unicast traffic, the active/inactive DL BWP configured for the UE should include the secondary BWP. Specifically, [ SF1, SF2] represents a frequency range corresponding to the secondary BWP, and SF2-SF1< =w (1). For a UE with RF capability class n, the UE should be configured with an active/inactive DL BWP within the frequency range [ SF2-w (n), SF1+w (n) ] and the start position of the active/inactive DL BWP configured to the UE is within the frequency range [ SF2-w (n), SF1], and the end position is within the frequency range [ SF2, SF1+w (n) ].

Preferably, each secondary BWP is preferentially configured for broadcast traffic in the region M, and then active/inactive DL BWP is preferentially configured for UE in the region M, followed by configuration of BWP for multicast traffic in the region M.

In summary, in the method for configuring MBS resources in an NR cell according to the present invention, a frequency range for transmitting broadcast services is first determined based on a bandwidth expected for broadcast service transmission, the range including initial BWP, then it is proposed to divide a plurality of BWP within the frequency range to reduce power consumption of a UE as much as possible, then to configure a frequency range of active/inactive DLBWP for the UE while receiving unicast services, based on a bandwidth supported by RF of the UE, and to configure frequency resources for multicast services outside of the frequency range for configuring active/inactive BWP for the UE of the largest RF class, in order to ensure that the UE receives broadcast services while receiving unicast services, is proposed. In order to avoid that the UE cannot receive all broadcast services in the corresponding frequency interval when the bandwidth (F2-F1) corresponding to the frequency interval for transmitting broadcast services is larger than w (1), it is further proposed to configure 1 or more secondary BWP in the carrier frequency bandwidth for transmitting broadcast services.

Based on the above embodiments, the present application configures MBS with the following resources in the NR cell:

(1) For transmitting respective BWP of the broadcast service.

(2) And each secondary BWP for transmitting the broadcast service.

(3) For configuring the frequency ranges of active/inactive BWP to UEs of respective RF capability levels.

(4) Frequency resources for transmitting multicast traffic.

Next, the present application provides a method for transmitting a broadcast service in an NR cell. When the base station receives a request to set up a broadcast service from the core network, for example: the base station receives the MBS session start request message from the core network, and determines the NR cell for transmitting the service according to the NR cell list or service area list for transmitting the service in the corresponding request. The base station adopts the MBS resource configuration method and the broadcast service sending method provided by the invention in each NR cell to transmit the broadcast service in the corresponding cell.

Fig. 6 is a signaling interaction diagram of a method for sending a broadcast service in an NR cell according to an embodiment of the present application. The embodiment of the application specifically describes a transmission process of a broadcast service. As shown in fig. 6, the method for processing a broadcast service includes:

s301, for any broadcast service transmitted in an NR cell, a base station selects one BWP from among the divided BWPs for transmission of the broadcast service, for transmitting the broadcast service in a PTM bearer, and generates PTM configuration information of the broadcast service. For a UE reporting an rrc_connected state interested in the broadcast service, if it cannot receive the broadcast service through an activated DL BWP, the base station either reconfigures the activated DL BWP of the UE so that the UE receives the broadcast service through the reconfigured activated DL BWP, or establishes a PTP bearer for the UE for transmitting the broadcast service to the UE, or establishes a secondary PTM bearer on 1 or more BWP different from the above-mentioned selected BWP for transmitting the broadcast service to a corresponding UE, and accordingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and secondary PTM bearer configuration information of the broadcast service.

In the NR cell, there are two scenarios in which one BWP is selected from among the divided BWPs for transmission of the broadcast service, and the base station adopts different methods in different scenarios. The method comprises the following steps:

scene one: the base station does not have any relevant information for the UE receiving the service.

In this scenario, the base station selects one BWP from the divided BWPs for transmitting the service in the PTM bearer, and the BWPs have enough free frequency resources for transmitting the broadcast service, so that the broadcast service can be ensured to meet the corresponding QOS requirements during transmission.

Preferably, the base station preferentially selects BWP with small bandwidth and free resources for transmitting the broadcast service. In so doing, the UE consumes little power.

And the base station generates PTM configuration information of the broadcast service and is used for receiving the broadcast service by the UE. The base station ends the processing of this step.

Scene II: the UE with at least one rrc_connected state reports the following broadcast service related information to the base station:

(1) ID of broadcast service of interest: at least including the ID of the broadcast service.

(2) RF capability of UE: at least including the maximum bandwidth supported by the UE.

In an LTE cell, a UE reports an MBMS of interest and other related information to a base station through an interest indication procedure. In an NR cell, the UE may report the above information to the base station through a similar procedure. Since the process of reporting the information is not the content of the present invention, the description is omitted.

In this scenario, the base station selects one BWP for the broadcast service based on the following configuration information of each UE that reported the broadcast service related information.

(1) Configuration information of an activated DL BWP of the UE.

(2) Configuration information of other BWP of the UE.

(3) RF capability of the UE.

Specifically, the base station selects one BWP among the divided BWPs for broadcast service transmission, and if the BWP satisfies the following condition, the base station selects to transmit the broadcast service on the BWP in a PTM bearer.

(1) There is a frequency intersection of the BWP and the activated DL BWP of the respective UEs.

(2) The CORESET and search space configured on the BWP for transmitting broadcast service schedule information are located on the frequency intersection.

(3) The frequency intersection has enough free frequency resources for transmitting the broadcast service, and can ensure that the broadcast service meets corresponding QOS requirements during transmission.

If there is no BWP satisfying the above condition among the divided BWPs for broadcast service transmission, the base station selects one BWP on which to transmit the broadcast service in a PTM bearer if the BWP satisfies the following condition.

(1) The BWP has a frequency intersection with the BWP of the respective UE: for each of the UEs, the frequency intersection is located on an active DL BWP of the UE or on some inactive BWP of the UE.

(2) CORESET and search space configured on the BWP for transmitting broadcast service scheduling information are located on the frequency intersection

If there is no BWP satisfying the above condition among the divided BWPs for broadcast service transmission, the base station selects one BWP for transmitting the broadcast service on the PTM bearer, and there are enough free frequency resources on the BWP for transmitting the broadcast service on the PTM bearer, and ensures that the broadcast service satisfies the corresponding QOS requirements when transmitting.

After selecting one BWP from among the divided BWPs for transmission of the broadcast service according to the above method, the base station generates PTM configuration information of the broadcast service for transmission of the broadcast service in a PTM bearer.

Then, the base station performs the following processing:

for any UE reporting the above information, if the frequency resource for transmitting the broadcast service on the selected BWP is not located on the active/inactive DL BWP of the UE, the base station either reconfigures the active DL BWP of the UE, or establishes a PTP bearer for the UE for transmitting the broadcast service, or establishes a secondary PTM bearer for transmitting the broadcast service to the UE.

Specifically, if the base station selects a manner of reconfiguring BWP, the base station reconfigures at least the activated DL BWP of the UE so that frequency resources for transmitting broadcast traffic on the selected BWP are located on the activated DL BWP after reconfiguration of the UE and there are enough free resources on the activated DL BWP after reconfiguration for carrying the existing traffic of the UE. The base station generates BWP reconfiguration information for the UE. The UE can simultaneously receive the existing service and the broadcast service on the reconfigured active DL BWP. In a subsequent step, the base station transmits BWP reconfiguration information and PTM configuration information of the broadcast service to the UE through dedicated signaling, the UE determines a new activated DL BWP according to the BWP reconfiguration information, receives an existing service on the new activated DL BWP, and receives the broadcast service according to the PTM configuration information of the broadcast service on the new activated DL BWP.

When the base station does not find a suitable frequency resource on the carrier frequency bandwidth for reconfiguration of the BWP of the UE, the base station can transmit the broadcast service to the UE only by establishing the PTP bearer.

Specifically, the base station may also directly select to establish PTP bearers for the UE for transmitting the broadcast service. Before a PTP bearer is established for the UE, the base station counts the number of UEs receiving the broadcast service over the PTP bearer.

When the number of UEs receiving the broadcast service through PTP bearer is not greater than BNUM (the number of beams adopted by SS/PBCH BLOCK in NR cell), the base station transmits the broadcast service to each UE through PTP bearer. The method for configuring PTP bearer for transmitting the broadcast service by the base station to the UE specifically comprises the following steps:

for each UE, the base station performs admission control on the broadcast traffic on the active DL BWP of the UE, and when the active DL BWP has enough free resources for transmitting the broadcast traffic in the PTP bearer, the base station generates configuration information of the PTP bearer. In the subsequent step, the base station sends the configuration information of the PTP bearer to the corresponding UE through a dedicated signaling. The UE establishes a PTP bearer according to the information on the activated DL BWP to receive the broadcast service and receives the existing service on the activated BWP.

If the admission control fails on the activated DL BWP, the base station sequentially tries each inactive BWP of the UE or configures a new BWP to the UE. When the base station succeeds in performing admission control on the broadcast service and the existing service of the UE on one inactive BWP or new BWP, the base station generates corresponding PTP bearer configuration information and BWP reconfiguration information. In the subsequent step, the base station sends the PTP bearer configuration information and BWP reconfiguration information to the corresponding UE through dedicated signaling. The UE determines a new activated DL BWP according to the BWP reconfiguration information, receives an existing service on the new activated DL BWP, and receives the broadcast service according to the PTP bearer configuration information on the new activated DL BWP.

When the number of UEs receiving the broadcast service through PTP bearers is greater than BNUM, the base station performs the following processing for the UEs receiving the broadcast service through PTP bearers:

the base station groups these UEs into several groups, with UEs having the same activated DL BWP being located in one group.

When the number of UEs in a group is greater than BNUM, the base station attempts to transmit the broadcast service over a PTM bearer to UEs in the group on the activated DL BWP of the group of UEs. The base station performs admission control of said broadcast traffic at an active DL BWP of the group of UEs, and when the active DL BWP has sufficient free resources for transmitting a PTM bearer, the base station determines to transmit said broadcast traffic over the active DL BWP with a PTM bearer to the respective UEs in the group. The PTM bearers configured for the group of UEs are indicated with the secondary PTM bearer so as to be distinguished from the PTM bearers configured on the selected BWP described above. When more than one group meets the condition of establishing PTM bearing, the base station establishes an auxiliary PTM bearing for each group of UE.

For each secondary PTM bearer, the base station generates corresponding secondary PTM configuration information. In the subsequent step, for the UE receiving the broadcast service through the auxiliary PTM bearer, the base station transmits corresponding auxiliary PTM configuration information to the UE through dedicated signaling. And the UE receives the broadcast service according to the received auxiliary PTM configuration information.

If at least one group does not satisfy the above condition, the base station continues the following processing for all groups that do not satisfy the condition:

selecting one group, counting the total number NUM1 of the UEs in the group, and examining the UEs in all other groups: if the inactive DL BWP of a UE is the active DL BWP of the group of UEs, the UE is recorded. The number of UEs NUM2 recorded is counted.

If NUM1+NUM2> BNUM, the base station attempts to transmit the broadcast traffic over the PTM bearer on the activated DL BWP of the group of UEs to the UEs in the group and each registered UE.

The base station performs admission control on the broadcast traffic on the activated DL BWP of the group of UEs and performs admission control on the existing traffic of each recorded UE. When the active DL BWP has enough free resources for transmitting the broadcast traffic in a PTM bearer and the active BWP has enough free resources for carrying the existing traffic of each recorded UE, the base station determines to transmit the broadcast traffic in a PTM bearer on the active BWP to the UEs in the group and to the respective recorded UEs.

The base station generates corresponding auxiliary PTM configuration information. For each recorded UE, the base station generates BWP reconfiguration information for the UE.

In a subsequent step, the base station sends the secondary PTM configuration information to the UEs within the group via dedicated signaling. Each UE in the group receives the broadcast service over the secondary PTM bearer on the activated DL BWP after receiving the dedicated signaling.

In a subsequent step, the base station transmits the secondary PTM configuration information and BWP reconfiguration information to each recorded UE through dedicated signaling. Each recorded UE, after receiving the dedicated signaling, determines a new active DL BWP according to the BWP reconfiguration information, receives the existing traffic on the new active DL BWP, and receives the broadcast traffic on the new active DL BWP over the secondary PTM bearer according to the secondary PTM configuration information.

Through the above processing, the base station deletes the group from all groups that do not satisfy the condition, and deletes all recorded UEs from the group in which the UEs are located.

However, if NUM1+num2< BNUM, or fails in performing the admission control on the activated DL BWP, the base station keeps the group in all groups that do not satisfy the condition, and each recorded UE also remains in the group in which the UE is located. The base station then selects one of the remaining groups, and performs the above-described processing on that group. Until the base station has performed the above-described processing for all groups.

Through the above processing, for each remaining UE that receives the broadcast service through the PTP bearer, the base station configures the PTP bearer for transmitting the broadcast service for the UE. The specific method for configuring PTP bearers to transmit the broadcast service is explained above, and will not be described again.

The PTM configuration information of the broadcast service described above includes at least the following:

(1) The location of the frequency intersection on the selected BWP or the location of the frequency resources on the selected BWP for broadcast traffic transmission.

(2) Configuration information of CORESET and search space configured on frequency intersections or on frequency resources used for broadcast traffic transmission.

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the broadcast service

(4) The high-level configuration information of the broadcast service includes: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(5) Physical layer configuration information, including: PDSCH related configuration information and PDCCH related configuration information. The PDSCH related configuration information at least comprises parameters adopted by MBS special PDSCH, and the PDCCH related configuration information at least comprises parameters adopted by MBS special PDCCH and DRX parameters for PDCCH monitoring. The DRX parameters used for PDCCH monitoring are used to determine a starting position for monitoring the PDCCH in each DRX cycle and other parameters used for continuously monitoring the PDCCH, such as: ON-DURATION timer and inactivity timer.

(6) And when the RB transmitted through the semi-static resource exists in the RBs included in the broadcast service, the configuration information of the semi-static resource of each RB.

For each secondary PTM bearer in the above, the secondary PTM configuration information generated by the base station at least includes the following:

(1) The secondary PTM carries configuration information of the BWP where it is located.

(2) And carrying CORESET of the auxiliary PTM carrying scheduling information and configuration information of a search space on the BWP.

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the broadcast service

The PTP bearer configuration information of the broadcast service described above includes at least the following contents:

(1) TMGI, session ID of the broadcast service

(2) The high-level configuration information of the broadcast service includes: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(3) Physical layer configuration information, including: PDSCH related configuration information and PDCCH related configuration information. The PDSCH related configuration information at least comprises parameters adopted by the PDSCH, and the PDCCH related configuration information at least comprises parameters adopted by the PDCCH and DRX parameters for monitoring the PDCCH. The DRX parameters used for PDCCH monitoring are used to determine a starting position for monitoring the PDCCH in each DRX cycle and other parameters used for continuously monitoring the PDCCH, such as: ON-DURATION timer and inactivity timer.

(4) And when the RB transmitted through the semi-static resource exists in the RBs included in the broadcast service, the configuration information of the semi-static resource of each RB.

The C-RNTI and SPS C-RNTI configured for the UE when transmitting the existing traffic of the UE are used to transmit the broadcast traffic to the UE in PTP bearer.

The BWP reconfiguration information above at least includes:

(1) DL BWP reconfiguration information: the UE reconfigures DL BWP according to the information, which at least includes: configuration information of the new activated DL BWP for the UE to reconfigure the activated DL BWP.

(2) Reconfiguration information of existing services of UE: the UE receives the existing service on the newly activated BWP according to the information;

s302: the base station sends PTM configuration information of the broadcast service in an NR cell through an SC-MCCH; for the UE reporting the rrc_connected state interested in the broadcast service, the base station transmits related information to the UE through dedicated signaling.

Specifically, the base station transmits the configuration information of the broadcast service to the UE of rrc_idle/rrc_inactive state through the SC-MCCH so that the UE receives the broadcast service.

More specifically, the base station broadcasts configuration information of the SC-MCCH through a system message on the initial BWP and transmits PTM configuration information of each broadcast service through the SC-MCCH on the initial BWP. The scheduling information of the SC-MCCH may be sent in a corresponding search space on CORESET 0, such as: search space 0. Of course, the SC-MCCH may also multiplex the same CORESET and search space with the system message or paging message on the initial BWP.

Specifically, the base station transmitting related information to the UE through dedicated signaling includes:

(1) If the UE can receive the broadcast service through the activated DL BWP, the base station sends PTM configuration information of the broadcast service to the UE through a special signaling;

(2) If the BWP of the UE is reconfigured to receive the broadcast service transmitted with the PTM bearer, the base station transmits PTM configuration information of the broadcast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

(3) If the base station transmits the broadcast service to the UE in a PTP broadcast bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through a dedicated signaling;

(4) If the base station transmits the broadcast service to the UE in PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

(5) If the base station configures one or more auxiliary PTM bearers for transmitting the broadcast service, for each auxiliary PTM bearer, for a UE adopting the auxiliary PTM bearer to receive the broadcast service, if the auxiliary PTM bearer is positioned on an activated DL BWP of the UE, the base station transmits configuration information of the auxiliary PTM bearer to the UE through a dedicated signaling, and if the auxiliary PTM bearer is not positioned on the activated DL BWP of the UE, the base station transmits the configuration information and BWP reconfiguration information of the auxiliary PTM bearer to the UE through the dedicated signaling;

the dedicated signaling may be: RRC reconfiguration message.

S303: the UE receives the SC-MCCH or the dedicated signaling and performs corresponding processing.

For the UE of RRC_IDLE/RRC_INACITVE state, the UE receives corresponding system information to obtain the configuration information of the SC-MCCH, then receives corresponding SC-MCCH, obtains the PTM configuration information of the broadcast service from the SC-MCCH, and receives the broadcast service according to the information.

For the UE reporting the rrc_connected state interested in the broadcast service, the UE performing corresponding processing according to the received dedicated signaling includes:

(1) If the special signaling only includes the PTM configuration information of the broadcast service, the UE establishes a corresponding PTM bearer according to the information for receiving the broadcast service.

(2) If the dedicated signaling includes the PTM configuration information and BWP reconfiguration information of the broadcast service, the UE reconfigures the BWP according to the BWP reconfiguration information, receives the existing service on the reconfigured activated DL BWP, and establishes a corresponding PTM bearer for receiving the broadcast service according to the PTM configuration information of the broadcast service on the reconfigured activated DL BWP.

(3) If the dedicated signaling includes PTP bearer configuration information, the UE establishes a PTP bearer for receiving the broadcast service on the activated DL BWP according to the information, and receives the broadcast service through the PTP bearer.

(4) If the dedicated signaling includes PTP bearer configuration information and DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives an existing service on the reconfigured active DL BWP, and establishes a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information on the reconfigured active DL BWP, and receives the broadcast service through the PTP bearer.

(5) If the special signaling includes the auxiliary PTM configuration information of the broadcast service, the UE establishes a corresponding auxiliary PTM bearer on the activated DL BWP according to the information for receiving the broadcast service.

(6) If the dedicated signaling includes the secondary PTM configuration information and DL BWP reconfiguration information of the broadcast service, the UE reconfigures the DL BWP according to the DL BWP reconfiguration information, receives the existing service on the reconfigured activated DL BWP, and establishes a corresponding secondary PTM bearer on the reconfigured activated DL BWP according to the secondary PTM bearer configuration information for receiving the broadcast service.

S304: and the base station adopts a corresponding bearer to send the broadcast service.

In summary, the base station transmitting the broadcast service by using the corresponding bearer includes:

(1) And the base station sends the broadcast service on the corresponding BWP through a PTM bearer according to the PTM configuration information of the broadcast service.

(2) For a UE receiving the broadcast service through a PTP bearer, a base station transmits the broadcast service through the PTP bearer on a corresponding BWP according to configuration information of the PTP bearer configured for the UE.

(3) When the base station configures the auxiliary PTM bearer, the base station sends the broadcast service on the corresponding BWP through the auxiliary PTM bearer according to the configuration information of each auxiliary PTM bearer.

Based on the PTM configuration information of the broadcast service, the base station transmitting the broadcast service on the corresponding BWP by using the PTM bearer includes: and the base station transmits a corresponding PDCCH and a corresponding PDSCH on the corresponding BWP, wherein the CRC of the PDCCH is scrambled by a G-RNTI, the G-RNTI is used for marking the broadcast service on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is composed of the data of the broadcasting service, and the PDSCH adopts G-RNTI when in bit scrambling.

When the configuration information of the semi-static resources of at least one RB is included in the PTM configuration information of the broadcast service, for each RB transmitted with the semi-static resources, the base station periodically transmits a PSDCH on the corresponding BWP using the corresponding semi-static resources, the TB on the PDSCH is composed of data of the RBs of the broadcast service, and the PDSCH uses SPS G-RNTI when bit scrambling. When the TB on the PDSCH is retransmitted, the base station transmits a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by an SPS G-RNTI, the SPS G-RNTI is used for marking the broadcast service on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. The TB on the PDSCH is the retransmitted TB, and the PDSCH adopts SPS G-RNTI when the bits are scrambled.

For a UE receiving the broadcast service through a PTP bearer, the base station transmitting the broadcast service to the UE through the PTP bearer on a corresponding BWP based on PTP bearer configuration information includes: the base station transmits a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, wherein the CRC of the PDCCH is scrambled by a C-RNTI, the C-RNTI is used for identifying the UE on an air interface, and a DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is composed of the data of the broadcasting service, and the PDSCH adopts the C-RNTI when in bit scrambling.

For a UE receiving the broadcast service through a PTP bearer, when the PTP bearer configuration information includes configuration information of a semi-static resource of at least one RB, for each RB transmitted with the semi-static resource, the base station periodically transmits a PSDCH on a corresponding BWP using the corresponding semi-static resource, a TB on the PDSCH is formed by data of the RB of the broadcast service, and the PDSCH uses SPS C-RNTI when bit scrambling. When the TB on the PDSCH is retransmitted, the base station transmits a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by an SPS C-RNTI, the SPS C-RNTI is used for identifying the UE on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. The TB on the PDSCH is the retransmitted TB, and the PDSCH adopts SPS C-RNTI when the bits are scrambled.

For a UE receiving the broadcast service with a secondary PTM bearer, the base station transmitting the broadcast service with the PTM bearer on a corresponding BWP based on configuration information of the secondary PTM bearer includes: and the base station transmits a corresponding PDCCH and a corresponding PDSCH on the corresponding BWP, wherein the CRC of the PDCCH is scrambled by a G-RNTI, the G-RNTI is used for marking the broadcast service on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is composed of the data of the broadcasting service, and the PDSCH adopts G-RNTI when in bit scrambling.

When the configuration information of the secondary PTM of the broadcast service comprises the configuration information of the semi-static resource of at least one RB, for each RB transmitted by the semi-static resource, the base station periodically transmits PSDCH by adopting the corresponding semi-static resource on the corresponding BWP, the TB on the PDSCH is composed of the data of the RB of the broadcast service, and the PDSCH adopts SPS G-RNTI when in bit scrambling. When the TB on the PDSCH is retransmitted, the base station transmits a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by SPS G-RNTI, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. The TB on the PDSCH is the retransmitted TB, and the PDSCH adopts SPS G-RNTI when the bits are scrambled.

And when the broadcast service is transmitted through the PTM bearer/auxiliary PTM bearer/PTP bearer, if at least one RB is transmitted in a semi-static resource mode, transmitting the rest RBs of the broadcast service through the PTM bearer/auxiliary PTM bearer/PTP bearer, wherein the TB on the PDSCH allocated to the PTM bearer/auxiliary PTM bearer/PTP bearer only consists of the data of the rest RBs of the broadcast service.

For a PTM bearer and a secondary PTM bearer transmitting the same broadcast service, the base station may allocate the same G-RNTI and the same SPS G-RNTI to these bearers for identifying the broadcast service on the air interface.

S305: and the UE receives the broadcast service through the corresponding bearer.

For the UE of RRC_IDLE/RRC_INACITVE state, the UE receives the broadcast service through PTM bearer

For the UE of rrc_connected state, the UE receiving the broadcast service through the corresponding bearer includes:

(1) And when the special signaling comprises the PTM configuration information of the broadcast service, the UE receives the broadcast service through a PTM bearer.

(2) And when the special signaling comprises PTP bearer configuration information, the UE receives the broadcast service through the PTP bearer.

(3) When the special signaling includes the auxiliary PTM bearer configuration information, the UE receives the broadcast service through the auxiliary PTM bearer.

For the UE of RRC_IDLE/RRC_INACITVE state, the UE monitors the PDCCH scrambled by the G-RNTI by the CRC in the corresponding search space on the corresponding CORESET on the corresponding BWP according to the PTM configuration information of the broadcast service, after the corresponding PDCCH is monitored, the UE determines the scheduling information of the PDSCH carrying the broadcast service according to the DCI format on the PDCCH, and receives the corresponding PDSCH according to the information to obtain the broadcast service.

When the configuration information of the PTM of the broadcast service includes the configuration information of the semi-static resource of at least one RB, for each RB transmitted with the semi-static resource, the UE receives a corresponding PDSCH on the corresponding BWP from the corresponding location using the corresponding semi-static resource, and obtains a TB from the PDSCH, where the TB is composed of data of the corresponding RB in the broadcast service. The UE also needs to monitor the PDCCH scrambled with SPS G-RNTI by CRC on the corresponding BWP, and when the corresponding PDCCH is monitored, receive the corresponding PDSCH according to the DCI format on the PDCCH, and obtain the retransmitted TB from the PDSCH.

For the UE of rrc_connected state, when the UE determines to receive the broadcast service through the PTM bearer, the UE performs the same processing as the UE of rrc_idle/rrc_inactive state described above.

For the UE of rrc_connected state, when the UE determines to receive the broadcast service through PTP bearer, the UE listens to the PDCCH scrambled with the C-RNTI by the CRC in the corresponding search space on the corresponding CORESET on the corresponding BWP, and after listening to the corresponding PDCCH, the UE determines scheduling information of the PDSCH carrying the broadcast service according to the DCI format on the PDCCH, and receives the corresponding PDSCH according to the information to obtain the broadcast service. And the corresponding search space on the corresponding CORESET on the corresponding BWP is used for bearing the scheduling information of the broadcast service.

When the PTP bearer configuration information includes configuration information of a semi-static resource of at least one RB, for each RB transmitted with the semi-static resource, the UE receives a corresponding PDSCH on the corresponding BWP starting from the corresponding location with the corresponding semi-static resource, and obtains a TB from the PDSCH, where the TB is composed of data of the corresponding RB in the broadcast service. The UE also needs to monitor the PDCCH scrambled with SPS C-RNTI by CRC on the corresponding BWP, and when the corresponding PDCCH is monitored, receive the corresponding PDSCH according to the DCI format on the PDCCH, and obtain the retransmitted TB from the PDSCH.

For the UE of RRC_CONNECTED state, when the UE determines to receive the broadcast service with the auxiliary PTM bearer, the UE monitors the PDCCH scrambled by the G-RNTI with the CRC on the corresponding BWP, after monitoring the corresponding PDCCH, the UE determines the scheduling information of the PDSCH carrying the broadcast service according to the DCI format on the PDCCH, and receives the corresponding PDSCH according to the information to obtain the broadcast service.

When the configuration information of the secondary PTM of the broadcast service contains the configuration information of the semi-static resource of at least one RB, for each RB transmitted by the semi-static resource, the UE starts to receive a corresponding PDSCH from a corresponding position on a corresponding BWP by adopting the corresponding semi-static resource, and obtains a TB from the PDSCH, wherein the TB consists of data of the corresponding RB in the broadcast service. The UE also needs to monitor the PDCCH scrambled with SPS G-RNTI by CRC on the corresponding BWP, and when the corresponding PDCCH is monitored, receive the corresponding PDSCH according to the DCI format on the PDCCH, and obtain the retransmitted TB from the PDSCH.

In summary, based on the MBS resource allocation method according to the present invention, the broadcast service transmission method according to the present invention includes the above 5 steps. In the method for sending the broadcast service, the base station sends the broadcast service through the PTM bearer, the PTP bearer and the auxiliary PTM bearer, and the UE receives the broadcast service through the PTM bearer or the PTP bearer or the auxiliary PTM bearer according to the self state and the related information obtained from the base station.

In the method of the present invention, in the second step, the configuration information carried by each auxiliary PTM of the broadcast service may also be sent through the SC-MCCH.

In the sending process of the broadcast service, the broadcast service transmission method of the invention further comprises the following steps: for the UE of RRC_IDLE/RRC_INACITVE state, if the UE can not receive the broadcast service through PTM bearing or auxiliary PTM bearing, the UE reports the related information of the broadcast service to the base station. The content of the broadcast service related information is described in scene two in step S301 in the embodiment shown in fig. 6.

The UE being unable to receive the broadcast service via a PTM bearer or a secondary PTM bearer includes the following scenarios:

the UE cannot do so without switching BWP: the broadcast service is received while receiving the related information on the initial BWP. Such as: as shown in fig. 1, the location of the frequency resource carrying the broadcast service is outside the BWP configuration range corresponding to the RF level of the UE.

In the sending process of the broadcast service, the broadcast service transmission method of the invention further comprises the following steps: for the UE of rrc_connected state, if the UE cannot receive the broadcast service on the activated DL BWP or the extended activated DL BWP through the PTM bearer or the auxiliary PTM bearer, the UE reports the broadcast service related information to the base station.

For the UE of rrc_connected state, when the UE cannot receive the broadcast service transmitted through the PTM bearer or the auxiliary PTM bearer through the activated DL BWP, if the UE can include frequency resources for carrying the broadcast service through self-expanding the frequency coverage of the activated DL BWP based on its RF capability level, it is considered that the UE can receive the broadcast service through the PTM bearer or the auxiliary PTM bearer on the expanded activated DL BWP, the UE does not need to report related information to the base station, and the UE can self-expand the activated DL BWP and receive the broadcast service on the corresponding frequency resources on the expanded activated DL BWP, but at the same time, the UE receives the existing service on the original activated DL BWP in the expanded activated DL BWP.

In the sending process of the broadcast service, the broadcast service transmission method of the invention further comprises the following steps: the base station provides the broadcast service to each reported UE according to the received related information reported by the UE in the following manner, including S31-S36:

s31: the BWP where the PTM bearer is located is changed so that all or a part of the UEs reporting the relevant information can receive the broadcast service on the new BWP. When the base station finds a BWP meeting the above condition, the base station generates PTM configuration information of the new broadcast service. If the base station cannot find the BWP meeting the above condition or still some UEs cannot receive the broadcast service on the new BWP with the PTM bearer, the base station reconfigures the BWP, establishes the auxiliary PTM bearer or PTP bearer for transmitting the broadcast service to the relevant UE, and generates corresponding BWP reconfiguration information, auxiliary PTM configuration information and PTP bearer configuration information.

The specific processing of this step refers to the processing in the second scenario in the first step in the above-mentioned broadcast service transmission method.

S32: the base station sends corresponding information to corresponding UE through SC-MCCH and special signaling

Specifically, the base station transmits the following information through the SC-MCCH in the NR cell:

(1) PTM configuration information for new broadcast service

(2) For the broadcast service, auxiliary PTM configuration information carried by each original auxiliary PTM

(3) For the broadcast service, auxiliary PTM configuration information of each newly-built auxiliary PTM bearer

For a specific method of the base station transmitting corresponding information to the corresponding UE through dedicated signaling, please refer to the related process in the second step in the above-mentioned transmission method of broadcast service.

After executing the above two steps, the base station executes the following three steps, and the following processing of S33-S35 is referred to the processing of S303-S305 in the above broadcast service transmission method, which is not described in detail.

S33: the UE receives the SC-MCCH or the dedicated signaling and performs corresponding processing.

S34: and the base station adopts a corresponding bearer to send the broadcast service.

S35: and the UE receives the broadcast service through the corresponding bearer.

On the basis of the above embodiment, after configuring relevant resources to the MBS in the NR cell, the present application further provides a method for sending multicast service in the NR cell. When the base station receives a request for establishing a multicast service from the core network, the base station determines the UE for receiving the multicast service according to the UE list in the corresponding request, and the base station transmits the multicast service to the corresponding UE in the corresponding NR cell. Such as: the base station receives an MBS session start request message from the core network, wherein the message carries a UE list for indicating the UE receiving the multicast service, and the base station transmits the multicast service to the corresponding UE in the corresponding NR cell based on the request. The MBS resource configuration method and the multicast service sending method provided by the invention are specifically as follows:

In the inventive method, a UE receiving a multicast service may have a unicast service being received, but does not need to receive a certain broadcast service.

Fig. 7 is a signaling interaction diagram of a method for sending a multicast service in an NR cell according to an embodiment of the present application. The embodiment of the application specifically describes a transmission process of the multicast service. As shown in fig. 7, the method for processing multicast service includes:

s401: for any one NR cell, the base station determines BWP for transmitting multicast traffic, and preferentially configures each of the BWP in the area M of the cell. CORESET and search space are configured on each BWP.

S402: according to the first message from the core network, the base station determines the multicast service to be transmitted, and according to the UE list in the message, the base station determines each NR cell for transmitting the multicast service. When at least one UE in one NR cell is located in the UE list, the cell needs to send the multicast service, and the first message is a request message for establishing the multicast service.

After receiving control plane information of a multicast service from an MBS server, the core network establishes a control plane information transmission path for the multicast service, and transmits the control plane information of the multicast service to a base station through the path. In a multicast service bearer establishment phase, control plane information of a multicast service transmitted to a base station is a request for establishing the multicast service. A request message indicating to the base station to set up a radio bearer for the multicast service during the multicast service set up phase is denoted herein by a "request to set up multicast service" message.

S403: the base station selects BWP for sending the multicast service in each cell transmitting the multicast service and generates relevant configuration information.

Specifically, there are two scenarios of selecting BWP for the multicast service, and the base station selects BWP for transmitting the multicast service in different scenarios by using different methods. The method comprises the following steps:

scene one: in the NR cell, each UE receiving the multicast service is at RRC_IDLE/RRC_INACITVE state before receiving the multicast service.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is smaller than BNUM, PTP bearers may be respectively established for each UE receiving the multicast service for transmitting the multicast service.

Specifically, the base station selects one normal BWP with enough free resources for configuring PTP bearer for each UE receiving the multicast service according to the service type of the multicast service, or selects one BWP with enough free resources for configuring PTP bearer for each UE receiving the multicast service from among the configured BWPs for transmitting the multicast service, and accordingly, the base station generates PTP bearer configuration information for each UE receiving the multicast service.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is smaller than the BNUM, the base station may further select, from the configured BWPs for multicast service transmission, a BWP with enough free resources for transmitting the multicast service over the PTM bearer, and generate PTM configuration information of the multicast service for the UEs to receive the multicast service. And when the broadcast service is sent by the PTM bearer, the multicast service is sent by the PTM bearer only in the beam where the UE receiving the multicast service is located. Such as: the total number of beams for transmitting SS/PBCH BLOCK in a cell is 8, 6 UEs in the cell receive the multicast service, the 6 UEs are located in four beams, wherein UE1, UE2 and UE3 are located in

beams

1, 2 and 3, respectively, and UE 4, 5 and 6 are located in beam 4, and then the base station transmits the multicast service in the cell by using

beams

1, 2, 3 and 4 through PTM bearer.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is not less than BNUM, the base station selects a BWP with enough free resources from the configured BWPs for multicast service transmission for transmitting the multicast service through the PTM bearer, and generates PTM configuration information of the multicast service for the UEs to receive the multicast service. The process of this step is ended.

Scene II: in NR cells, at least one UE receives unicast service at RRC_CONNECTED state before receiving the multicast service

The base station selects BWP for the multicast service based on the following information of each UE receiving the unicast service at rrc_connected state, for transmitting the multicast service, and generates corresponding configuration information.

(1) RF capability: maximum supported bandwidth

(2) Configuration information of activated DL BWP of UE and configuration information of other DL BWP

Specifically, the base station selects either a normal BWP with enough free resources according to the traffic type of the multicast traffic for configuring PTP bearer for each UE receiving the multicast traffic and having no unicast traffic, or selects one BWP with enough free resources among the configured BWPs for transmitting the multicast traffic for configuring PTP bearer for each UE receiving the multicast traffic and having no unicast traffic, and accordingly, the base station generates PTP bearer configuration information for each UE receiving the multicast traffic and having no unicast traffic.

The base station may also divide UEs receiving the multicast service and having unicast service into groups, the UEs within each group having the same activated DL BWP. The number of UEs within each group is determined. The activated DL BWP of each group of UEs is sequentially recorded in order of at least more according to the number of UEs within the group.

And selecting a first BWP from the recorded activated DL BWPs, performing admission control on the BWPs, and if enough free resources exist on the BWPs for configuring PTP bearer for each UE receiving the multicast service and having no unicast service for transmitting the multicast service, generating corresponding PTP bearer configuration information for each UE receiving the multicast service and having no unicast service by the base station. Otherwise, the base station sequentially tries each recorded activated DL BWP in sequence. If none of the activated DL BWP satisfies the condition, the base station selects BWP among other general BWP or configured BWP for multicast traffic transmission to attempt. When admission control on one BWP is successful, the base station generates corresponding PTP bearer configuration information for each UE receiving the multicast service and without unicast service.

For a UE receiving the multicast service and having a unicast service, if the selected BWP is not an active DL BWP of the UE, the base station either reconfigures the BWP of the UE or configures PTP bearers on the active DL BWP of the UE for transmitting the multicast service.

Specifically, if the base station selects the BWP reconfiguration method, the base station configures the activated DL BWP of the UE to the selected BWP and performs admission control on the selected BWP, and if the selected BWP has enough free resources for carrying the existing traffic of the UE and enough resources for transmitting the multicast traffic to the UE in PTP bearer, the base station generates corresponding BWP reconfiguration information and corresponding PTP bearer configuration information.

When there are insufficient resources on the selected BWP for reconfiguring the BWP of the UE, the base station can transmit the broadcast service to the UE only through PTP bearers.

The method for configuring PTP bearer for transmitting multicast service to UE is the same as the method for configuring PTP bearer for transmitting broadcast service to UE, and will not be described again.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is not less than the BNUM, the base station selects BWP among the configured BWP for transmitting the multicast service, and makes the frequency resource for transmitting the multicast service on the selected BWP be located on the activated DL BWP or the non-activated DL BWP of the UE receiving the multicast service and having the unicast service as much as possible.

After selecting BWP, the base station generates PTM configuration information of the multicast service. Then, the base station performs the following processing:

For any UE reporting the above information, if the frequency resource for transmitting the multicast service on the selected BWP is not located on the activated DL BWP of the UE, the base station either reconfigures the BWP of the UE so that the frequency resource for transmitting the multicast service on the selected BWP is located on the activated DL BWP of the UE after reconfiguration, or establishes a PTP bearer for the UE for transmitting the multicast service, or establishes a secondary PTM bearer for transmitting the multicast service to the UE.

Specifically, the method of the base station re-configuring BWP for the UE receiving the multicast service, the method of establishing PTP bearer for the UE receiving the multicast service, and the method of configuring auxiliary PTM bearer for the UE receiving the multicast service refer to corresponding processing in scenario two in the first step of the sending method of the broadcast service in the present invention.

Through the above processing, the base station generates the following configuration information:

(1) If the BWP of the UE is reconfigured to receive the multicast service transmitted with the PTM bearer, the base station generates corresponding BWP reconfiguration information for the UE;

(2) If the base station configures a PTP bearer for the UE on the activated DL BWP of the UE for transmitting the multicast service to the UE, the base station generates configuration information of the PTP bearer for the UE;

(3) If the base station configures PTP bearer on the reconfigured activated DL BWP for the UE for transmitting the multicast service to the UE, the base station generates PTP bearer configuration information and BWP reconfiguration information for the UE.

(4) If the base station configures one or more auxiliary PTM bearers for transmitting the multicast service, for each auxiliary PTM bearer, for a UE that receives the multicast service using the auxiliary PTM bearer, if the auxiliary PTM bearer is not located on an activated DL BWP of the UE, the base station generates BWP reconfiguration information for the UE.

The PTM configuration information of the multicast service generated by the base station at least comprises:

(1) Location of frequency resources for transmission of the multicast service on a BWP transmitting the multicast service

(2) Configuration information of CORESET and search space configured on frequency resources for multicast traffic transmission

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the multicast service

(4) The high-level configuration information of the multicast service comprises: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(6) And when the multicast service comprises the RBs transmitted through the semi-static resources, the configuration information of the semi-static resources of each RB is included.

For each secondary PTM bearer used for transmitting the multicast service, the secondary PTM configuration information generated by the base station at least includes the following contents:

(1) Configuration information of BWP where the secondary PTM bearer is located

(2) Configuration information of CORESET and search space for carrying scheduling information of the secondary PTM on the BWP

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the multicast service

The PTP bearer configuration information is the same as the PTP bearer configuration information in step S301 in the embodiment of the present application shown in fig. 6, and is not described again.

The BWP reconfiguration information is the same as the BWP reconfiguration information in step S301 in the embodiment of the present application shown in fig. 6, and will not be described again.

S404: the base station sends the relevant configuration information to each UE receiving the multicast service through the special signaling.

(1) If the UE can receive the multicast service through the activated DL BWP, the base station sends PTM configuration information of the multicast service to the UE through dedicated signaling;

(2) If the BWP of the UE is reconfigured to receive the multicast service transmitted with the PTM bearer, the base station transmits PTM configuration information of the multicast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

(3) If the base station transmits the multicast service to the UE through PTP bearing on the activated DL BWP of the UE, the base station transmits PTP bearing configuration information to the UE through special signaling;

(4) If the base station transmits the multicast service to the UE in PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

(5) If the base station configures one or more auxiliary PTM bearers for transmitting the multicast service, for each auxiliary PTM bearer, for a UE adopting the auxiliary PTM bearer to receive the multicast service, if the auxiliary PTM bearer is positioned on an activated DL BWP of the UE, the base station transmits configuration information of the auxiliary PTM bearer to the UE through a dedicated signaling, and if the auxiliary PTM bearer is not positioned on the activated DL BWP of the UE, the base station transmits configuration information and BWP reconfiguration information of the auxiliary PTM bearer to the UE through the dedicated signaling;

the dedicated signaling may be an RRC reconfiguration message.

S405: and the UE receives the special signaling sent by the base station and establishes a corresponding bearer according to the special signaling for receiving the multicast service.

The UE performing corresponding processing according to the received dedicated signaling includes:

(1) If the dedicated signaling only includes the PTM configuration information of the multicast service, the UE establishes a corresponding PTM bearer for receiving the multicast service according to the information.

(2) If the dedicated signaling includes the PTM configuration information and BWP reconfiguration information of the multicast service, the UE reconfigures the BWP according to the BWP reconfiguration information, receives the existing service on the reconfigured activated DL BWP, and establishes a corresponding PTM bearer for receiving the multicast service according to the PTM configuration information of the multicast service on the reconfigured activated DL BWP.

(3) If the dedicated signaling includes PTP bearer configuration information, the UE establishes a PTP bearer for receiving the multicast service on the activated DL BWP according to the information, and receives the multicast service through the PTP bearer.

(4) If the dedicated signaling includes PTP bearer configuration information and BWP reconfiguration information, the UE reconfigures the BWP according to the BWP reconfiguration information, receives an existing service on the reconfigured activated DL BWP, and establishes a PTP bearer for receiving the multicast service according to the PTP bearer configuration information on the reconfigured activated DL BWP, and receives the multicast service through the PTP bearer.

(5) If the dedicated signaling includes the auxiliary PTM configuration information of the multicast service, the UE establishes a corresponding auxiliary PTM bearer on the activated DL BWP according to the information, for receiving the multicast service.

(6) If the dedicated signaling includes the auxiliary PTM configuration information and BWP reconfiguration information of the multicast service, the UE reconfigures the BWP according to the BWP reconfiguration information, receives the existing service on the reconfigured activated DL BWP, and establishes a corresponding auxiliary PTM bearer on the reconfigured activated DL BWP according to the auxiliary PTM bearer configuration information for receiving the multicast service.

S406: and the base station transmits the multicast service through the corresponding bearer in the NR cell.

Specifically, the base station transmitting the multicast service in the NR cell through the corresponding bearer includes:

(1) Transmitting the multicast service over PTM bearer

(2) Transmitting the multicast traffic over PTP bearers

(3) Transmitting the multicast service over a secondary PTM bearer

S407: and the UE receives the multicast service through the corresponding bearer.

Specifically, the UE receiving the multicast service through the corresponding bearer includes:

(1) And when the special signaling comprises the PTM configuration information of the multicast service, the UE receives the multicast service through the PTM bearer.

(2) When the dedicated signaling includes PTP bearer configuration information, the UE receives the multicast service through the PTP bearer

(3) When the special signaling includes the auxiliary PTM bearing configuration information, the UE receives the multicast service through the auxiliary PTM bearing

The method for receiving the multicast service by the UE through the PTM bearer, the PTP bearer, and the auxiliary PTM bearer is the same as the method for receiving the broadcast service by the UE through the PTM bearer, the PTP bearer, and the auxiliary PTM bearer in the embodiment of the application shown in fig. 6. And will not be described in detail.

In the above process, the G-RNTI and SPS G-RNTI are uniformly allocated to the PTM bearer and the auxiliary PTM bearer, namely: when the same multicast service is sent through different PTM bearers, the same G-RNTI and SPS G-RNTI are adopted, and each multicast service has a unique identifier on an air interface: G-RNTI and SPS G-RNTI.

On the basis of the above-described embodiments, after configuring relevant resources to MBS in NR cells, active DL BWP and inactive DL BWP may be configured for UEs. Fig. 8 is a flow chart of a method for configuring an activated DL BWP and an inactive DL BWP according to an embodiment of the present application. As shown in fig. 8, for a UE of rrc_connected state, when the UE is configured with BWP for transmitting normal traffic while the UE accesses a cell through initial BWP, the following method is adopted:

s501, a plurality of ordinary BWP is preconfigured, and each ordinary BWP corresponds to one service type or multiple service types.

Such as; one or more BWP is configured for URLLC, one or more BWP is configured for voice traffic, one or more BWP is configured for data traffic, and one or more BWP is configured for video traffic. One or more BWP may also be configured, wherein each BWP is used to transmit multiple traffic types.

It should be noted that the configuration of one or more general BWP in the embodiment of the present application is only one possibility in the embodiment of the present application, and constitutes a limitation of the present application.

S502, a general BWP is preferentially configured to the UE or a special BWP is preferentially configured to the UE.

The method comprises the following steps: the UE is preferentially configured with the normal BWP.

Specifically, the base station selects one or more BWP from the 1 or more common BWP corresponding to the service type according to the service type of the UE, and configures the BWP to the UE.

Then, the UE may also be configured with 1 or more special BWP, each including a frequency range [ F1, F2] for the broadcast service.

The UE may also be configured with 1 or more special BWP, each including one secondary BWP

The second method is as follows: the UE is preferentially configured with special BWP.

Specifically, the UE is configured with 1 or more special BWP including a frequency interval [ F1, F2] for a broadcast service or including one secondary BWP according to the RF capability of the UE.

The UE may also be configured with 1 or more general BWP.

When no corresponding resources are configured for the UE to the special BWP, 1 or more general BWP are configured for the UE according to the service type of the UE.

The method of configuring the special BWP to the UE is shown in S203 and S206 of the resource configuration method of the MBS in the present invention.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Fig. 9 is a schematic structural diagram of an apparatus for configuring MBS resources in an NR cell according to an embodiment of the present application. The apparatus may be implemented by software, hardware or a combination of both, and may be, for example, a base station in the above embodiment to perform the method in the above embodiment. As shown in fig. 9, the apparatus 600 for configuring MBS resources in the NR cell includes:

a first determining module 601, configured to determine a frequency interval for broadcast service transmission according to a bandwidth expected for broadcast service transmission, where the frequency interval includes an initial bandwidth portion BWP;

a dividing module 602, configured to divide a frequency interval into one or more BWP, and configure a control resource set CORESET and a search space on each of the divided BWP, where CORESET and the search space are used to transmit scheduling information of a broadcast service transmitted on the corresponding BWP;

a second determining module 603, configured to determine, for each radio frequency RF level, a frequency range for active/inactive DL BWP configuration, where when the active/inactive DL BWP configured for the UE is located in the frequency range corresponding to the RF level of the UE and includes a frequency interval for transmitting broadcast services, the UE may receive any one broadcast service while receiving unicast service;

A third determining module 604, configured to configure frequency resources for the multicast service in an area outside the frequency range corresponding to the maximum RF level, or set reserved areas on the left side and the right side of the frequency range corresponding to the maximum RF level, respectively, and configure frequency resources for the multicast service in the frequency range corresponding to the maximum RF level and the area outside the reserved areas, for ensuring that the UE receives the broadcast service while receiving the unicast service;

a compression module 605, configured to compress, when a bandwidth corresponding to a frequency interval for transmitting a broadcast service is greater than a maximum bandwidth supported by a UE with a minimum radio frequency level, the bandwidth corresponding to a frequency interval to the frequency interval under a condition of ensuring that the frequency interval includes an initial BWP, and simultaneously configure one or more secondary BWP for transmitting the broadcast service within a carrier frequency bandwidth, and broadcast configuration information of each secondary BWP on the initial BWP;

a processing module 606, configured to determine, for each secondary BWP, a frequency range for active/inactive DL BWP configuration for each RF level in order to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, and when the active BWP configured for the UE is located within the frequency range corresponding to the RF level of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

Optionally, the first determining module 601 is specifically configured to predict a bandwidth for broadcast service transmission; on the premise that the initial BWP is used for transmitting the broadcast service, determining the bandwidth which can be actually used for transmitting the broadcast service on the whole initial BWP; a frequency interval within the cell for broadcast service transmission is determined.

Optionally, the partitioning module 602 is specifically configured to uniformly configure one or more sets of CORESET and search space for each partitioned BWP in the initial BWP, where each set of CORESET and search space is formed by one CORESET and one common search space configured on the CORESET; alternatively, CORESET and search space are respectively configured for each partitioned BWP.

The apparatus for configuring MBS resources in an NR cell provided in this embodiment is used to implement the method for configuring MBS resources in an NR cell, which is not described herein.

Fig. 10 is a schematic structural diagram of an apparatus for configuring an active BWP and an inactive BWP according to an embodiment of the present application. The apparatus may be implemented by software, hardware or a combination of both, and may be, for example, a base station in the above embodiment to perform the method in the above embodiment. As shown in fig. 9, the apparatus 700 for configuring the activated BWP and the deactivated BWP includes:

a configuration module 701, configured to pre-configure a plurality of ordinary BWP, where each ordinary BWP corresponds to one service type or multiple service types;

An allocation module 702 is configured to prioritize a common BWP for a UE or to prioritize a special BWP for a UE, each of which includes a frequency interval for transmitting broadcast traffic or one of the secondary BWPs.

The apparatus for configuring MBS resources in an NR cell provided in this embodiment is similar to the principle and technical effects implemented by the foregoing method for configuring MBS resources in an NR cell, and will not be described herein.

Fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application, as shown in fig. 11, the electronic device may include: at least one processor 801 and a memory 802. Fig. 11 shows an electronic device using one processor as an example.

A memory 802 for storing programs. In particular, the program may include program code including computer-operating instructions.

Memory 802 may comprise high-speed RAM memory or may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The processor 801 is configured to execute computer-executable instructions stored in the memory 802 to implement the above form generation method;

the processor 801 may be a central processing unit (Central Processing Unit, abbreviated as CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), or one or more integrated circuits configured to implement embodiments of the present application.

Alternatively, in a specific implementation, if the communication interface, the memory 802, and the processor 801 are implemented independently, the communication interface, the memory 802, and the processor 801 may be connected to each other and perform communication with each other through buses. The bus may be an industry standard architecture (Industry Standard Architecture, abbreviated ISA) bus, an external device interconnect (Peripheral Component, abbreviated PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, abbreviated EISA) bus, among others. Buses may be divided into address buses, data buses, control buses, etc., but do not represent only one bus or one type of bus.

Alternatively, in a specific implementation, if the communication interface, the memory 802, and the processor 801 are implemented on a chip, the communication interface, the memory 802, and the processor 801 may complete communication through internal interfaces.

The embodiment of the application also provides a system for sending the broadcasting service in the NR cell, which comprises:

Optionally, the UE is further configured to:

if the RRC connection UE interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer and auxiliary PTM bearer, reporting the information of the broadcast service and the RF capability of the UE which are interested in the broadcast service to the base station;

and if the UE in the RRC idle state/RRC inactive state interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer and auxiliary PTM bearer, reporting the information of the interested broadcast service and the RF capability of the UE to the base station.

The embodiment of the application also provides a system for sending the multicast service in the NR cell, which comprises:

Optionally, the base station is specifically configured to

The embodiment of the application also provides a chip, which comprises a processor and an interface. Wherein the interface is used for inputting and outputting data or instructions processed by the processor. The processor is configured to perform the methods provided in the method embodiments above. The chip can be applied to a resource allocation device.

The present application also provides a computer-readable storage medium, which may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random-access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, etc., in which program codes can be stored, and specifically, the computer-readable storage medium stores therein program information for use in the above-described method.

The present application also provides a program for performing the method provided by the above method embodiments when being executed by a processor.

The present application also provides a program product, such as a computer readable storage medium, having instructions stored therein, which when run on a computer, cause the computer to perform the method provided by the above-described method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present invention are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.) means from one website, computer, server, or data center. Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc., that contain an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A method for configuring MBS resources in an NR cell, comprising:

2. The method of claim 1, wherein the determining a frequency interval for broadcast traffic transmission based on the predicted bandwidth for broadcast traffic transmission comprises:

bandwidth intended for broadcast traffic transmissions;

3. The method according to claim 1 or 2, wherein said configuring CORESET and search space on each partitioned BWP comprises:

4. A method for transmitting a broadcast service in an NR cell, the method being applied to a communication system, the communication system including a base station and a UE, the method comprising:

for any broadcast service transmitted in an NR cell, a base station selects one BWP from divided BWPs for broadcast service transmission, transmits the broadcast service in a point-to-multipoint PTM bearer, generates PTM configuration information of the broadcast service, and for a UE reporting a Radio Resource Control (RRC) connection state interested in the broadcast service, if the UE cannot receive the broadcast service through an activated DL BWP, the base station either reconfigures the activated DL BWP of the UE, or establishes a PTP bearer for the UE, or configures a secondary PTM bearer for the UE, and correspondingly, the base station generates BWP reconfiguration information, PTP bearer configuration information and secondary PTM bearer configuration information of the broadcast service;

the base station adopts corresponding bearing to send the broadcast service;

and the UE receives the broadcast service through the corresponding bearer.

5. The method of claim 4, wherein the reporting the RRC-connected UE interested in the broadcast service, the base station transmitting the relevant information to the UE through dedicated signaling, comprises:

6. The method of claim 4, wherein the UE receives the SC-MCCH or the dedicated signaling and performs corresponding processing, comprising:

or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, and the UE receives an existing service on the reconfigured activated DL BWP and establishes a corresponding PTM bearer on the reconfigured activated DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTP bearer configuration information, the UE establishes a PTP bearer for receiving the broadcast service on the activated DL BWP according to the PTP bearer configuration information, and receives the broadcast service through the PTP bearer;

or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTP bearer configuration information and the DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives an existing service on the reconfigured activated DL BWP, and establishes a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information on the reconfigured activated DL BWP, and receives the broadcast service through the PTP bearer;

Or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes auxiliary PTM configuration information of the broadcast service, the UE establishes a corresponding auxiliary PTM bearer on the activated DL BWP according to the auxiliary PTM configuration information, and is configured to receive the broadcast service;

7. The method of claim 4, wherein the base station transmitting the broadcast service using the corresponding bearer comprises:

Or when the base station configures the auxiliary PTM bearer, the base station sends the broadcast service on the corresponding DL BWP through the auxiliary PTM bearer according to the configuration information of each auxiliary PTM bearer.

8. The method of claim 4, wherein the UE receives the broadcast service over a corresponding bearer, comprising:

9. The method according to claim 4, wherein the method further comprises:

10. The method according to claim 4, wherein the method further comprises:

11. A method for transmitting multicast service in an NR cell, which is applied to a communication system, where the communication system includes a base station and a UE, the method comprising:

and the UE receives the multicast service through the corresponding bearer.

12. The method of claim 11, wherein the base station transmitting the relevant configuration information to each UE receiving the multicast service through dedicated signaling comprises:

13. An apparatus for configuring MBS resources in an NR cell, comprising:

14. The apparatus according to claim 13, wherein the first determining module is configured to predict a bandwidth for a broadcast service transmission; on the premise that the initial BWP is used for transmitting broadcast services, determining the bandwidth which can be actually used for transmitting the broadcast services on the whole initial BWP; a frequency interval within the cell for broadcast service transmission is determined.

15. The apparatus according to claim 13 or 14, wherein said partitioning module is specifically configured to uniformly configure one or more sets of CORESETs and search spaces for each BWP of said partition within said initial BWP, each set of CORESETs and search spaces being composed of one CORESET and one common search space configured on the CORESET; alternatively, CORESET and search space are respectively configured for each partitioned BWP.

16. A transmission system of a broadcast service in an NR cell, the system comprising:

17. The system of claim 16 wherein the base station is configured to, in particular, for reporting RRC-connected UEs interested in the broadcast service, if the UE is capable of receiving the broadcast service through an activated DL BWP, send PTM configuration information of the broadcast service to the UE through dedicated signaling;

18. The system according to claim 16, wherein the UE is specifically configured to receive a corresponding system message to obtain configuration information of the SC-MCCH when the UE is an RRC idle state/RRC inactive state UE, and to receive a corresponding SC-MCCH, obtain PTM configuration information of the broadcast service from the SC-MCCH, and establish a corresponding PTM bearer according to the PTM configuration information of the broadcast service, for receiving the broadcast service;

Or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives an existing service on the reconfigured activated DL BWP, and establishes a corresponding PTM bearer on the reconfigured activated DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTP bearer configuration information, a PTP bearer for receiving the broadcast service is established on the activated DL BWP according to the PTP bearer configuration information, and the broadcast service is received through the PTP bearer;

or when the UE is an RRC-connected UE that reports interest in the broadcast service, if the dedicated signaling includes PTP bearer configuration information and the DL BWP reconfiguration information, reconfiguring DL BWP according to the DL BWP reconfiguration information, receiving an existing service on the reconfigured activated DL BWP, and establishing a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information on the reconfigured activated DL BWP, and receiving the broadcast service through the PTP bearer;

Or when the UE is an RRC connection state UE which is interested in the broadcast service, if the special signaling comprises auxiliary PTM configuration information of the broadcast service, establishing a corresponding auxiliary PTM bearer on the activated DL BWP according to the auxiliary PTM configuration information, and receiving the broadcast service;

19. The system according to claim 16, wherein said base station is configured specifically for said transmitting said broadcast service over a PTM bearer on a corresponding DL BWP according to PTM configuration information of said broadcast service;

Or when the base station configures the auxiliary PTM bearer, according to the configuration information of each auxiliary PTM bearer, sending the broadcast service on the corresponding DL BWP through the auxiliary PTM bearer.

20. The system of claim 16 wherein the UE is configured to receive the broadcast service over a PTM bearer, in particular for RRC idle/RRC inactive UEs;

21. The system of claim 16 wherein the base station is further configured to send configuration information carried by each secondary PTM of the broadcast service over an SC-MCCH.

22. The system of claim 16, wherein the UE is further configured to:

23. A transmission system of multicast traffic in an NR cell, the system comprising:

24. The system according to claim 23, characterized in that the base station is specifically configured to