CN117121515A - User equipment, base station and MBS wireless communication method - Google Patents

Abstract

The present application discloses a User Equipment (UE), a base station and a wireless communication method for multicast/broadcast service (MBS). A wireless communication method of MBS performed by a UE includes reporting a service interest of the UE and a beam quality measurement report of the UE to a base station, receiving a multicast control channel (multicast control channel, MCCH) and a beam scanning configuration related to the service interest of the UE from the base station, and monitoring the MCCH and the beam scanning configuration to receive the related service interest. This may solve the problems in the prior art, provide flexible MBS scheduling, provide separate control plane scheduling for different MBS services, reduce signaling overhead, reduce UE complexity, and/or provide good communication performance.

Description

User equipment, base station and MBS wireless communication method

Technical Field

The present application relates to the field of communication, and more particularly, to a User Equipment (UE), a base station, and a wireless communication method for multicast/broadcast service (MBS), which can provide a flexible Control Plane (CP) scheduling mechanism for efficient MBS transmission and reception.

Background

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These wireless communication systems are capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (fourth generation, 4G) systems such as long term evolution (long term evolution, LTE) systems and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as code division multiple access (code division multiple access, CDMA), time division multiple access (time division multiple access, TDMA), frequency division multiple access (frequency division multiple access, FDMA), orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA), or discrete fourier transform spread-OFDM (discrete Fourier transform-spread-OFDM, DFT-S-OFDM). A wireless multiple-access communication system may include multiple base stations or network access nodes, each supporting communication for multiple communication devices, which may be otherwise referred to as User Equipment (UEs). The wireless communication network may include base stations capable of supporting communication for the UE. The UE may communicate with the base station via Downlink (DL) and Uplink (UL). DL refers to the communication link from a base station to a UE, and UL refers to the communication link from a UE to a base station.

In third generation partnership project (3rd generation partnership project,3GPP) cellular networks, broadcast and multicast traffic may be transmitted via transmission traffic known as multimedia broadcast/multicast traffic (multimedia broadcast/multicast service, MBMS). A broadcast multicast service center (broadcast multicast service center, BM-SC) server is responsible for disseminating media content to a group of subscribers. When the UE moves out of network coverage, the UE may not be able to use MBMS because the uplink and downlink connections to the BM-SC server are no longer available. MBMS is a point-to-multipoint (PTM) interface specification intended to provide efficient transmission of broadcast and multicast services within a 3GPP cellular network. Examples of MBMS interface specifications include those described in the universal mobile telecommunications system (universal mobile telecommunication system, UMTS) and long term evolution (long term evolution, LTE) communication specifications. For broadcast transmissions across multiple cells, the specification defines transmissions on a single frequency network configuration. Contemplated applications include mobile television, news, radio, file transfer, emergency alerts, and the like. When passing through the MBMS broadcast service, all cells within a multimedia broadcast/multicast service single frequency network (multimedia broadcast/multicast service single frequency network, MBSFN) area transmit the same MBMS service.

Users access these services and acquire MBMS content through wireless communication devices such as cellular telephones, tablet computers, notebook computers, and other devices having wireless transceivers that communicate with base stations within the communication system. The base station provides wireless services to wireless communication devices (sometimes referred to as mobile devices or UEs) within a cell. A user may access at least some multimedia services through the UE using a point-to-point (PTP) connection or PTM transmission. In 3GPP systems, PTP services may be provided using unicast technology and PTM transmissions may be provided using MBMS communications, transmitted over MBSFN or single cell point-to-multipoint (single cell point to multipoint, SC-PTM) communications. In a system operating in accordance with a revision of the 3GPP long term evolution (long term evolution, LTE) communication specification, MBMS is provided using eMBMS. Therefore, the MBMS service may be provided using unicast service, MBSFN, or SC-PTM in the LTE system.

In radio access network (radio access network, RAN) conference #88-e held 29 in 6, 2020 to 3 in 7, 2020, a new work item is approved aimed at RAN supporting multicast/broadcast service (MBS) in 5G. The goal of this work item is to provide support in the RAN, enabling generic MBS services on 5GS to support different MBS services, such as public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, wireless software delivery, group communication and internet of things applications. One of the main goals of the RAN work item is to study and prescribe support for basic mobility and service continuity for the 5G New Radio (NR) multicast/broadcast service (multicast/broadcast service, MBS).

During recent 3GPP conferences (RAN-112 e and RAN-113 e), MBS Control Plane (CP) issues of NR MBS are widely discussed. Discussion about MBS control plane design focuses on the reuse of LTE SC-PTM design for NR MBS (i.e. because of similarity, i.e. LTE SC-PTM and NR MBS only consider single cell operation). However, according to the requirement of approval work in ran#88-e, the design of satisfying NR MBS control plane should consider the flexibility of scheduling to support dynamics, to support dynamic distribution of UEs in an area, dynamic control of a service area, and flexible configuration of MBS control channels, to support different services with high resource efficiency; otherwise, more signaling overhead may occur, for example, if delay tolerant traffic and delay sensitive traffic are configured together in one control channel, thereby requiring frequent scheduling of the control channel in order to meet delay requirements from the delay sensitive traffic.

Accordingly, there is a need for a User Equipment (UE), a base station, and a wireless communication method that can solve the problems in the prior art, provide flexible MBS scheduling, separate control plane scheduling for different MBS services, reduce signaling overhead, reduce UE complexity, and/or provide good communication performance.

Disclosure of Invention

An object of the present invention is to propose a User Equipment (UE), a base station and a wireless communication method, which can solve the problems in the prior art, provide flexible MBS scheduling, separate control plane scheduling for different MBS services, reduce signaling overhead, reduce UE complexity and/or provide good communication performance.

In a first aspect of the present invention, a wireless communication method for multicast/broadcast service (MBS), the method being performed by a User Equipment (UE), the method comprising: reporting the service interest of the UE to a base station and a beam quality measurement report of the UE; receiving a multicast control channel (multicast control channel, MCCH) and a beam scanning configuration related to the traffic interest of the UE from the base station; and monitoring the MCCH and beam scanning configuration related to the traffic interest of the UE.

In a second aspect of the present invention, a wireless communication method for multicast/broadcast service (MBS), the method being performed by a base station, the method comprising: receiving, from one or more User Equipments (UEs), a traffic interest of the one or more UEs and a beam quality measurement report of the one or more UEs; determining a multicast control channel (multicast control channel, MCCH) and a beam scanning configuration related to the traffic interests of the one or more UEs based on the traffic interests of the one or more UEs and the beam quality measurement reports of the one or more UEs; and configuring, to the one or more UEs, a multicast control channel, MCCH, and beam scan configuration related to the traffic interests of the one or more UEs.

In a third aspect of the present invention, a User Equipment (UE) includes: a memory, a transceiver, and a processor are coupled to the memory and the transceiver. The processor is configured to report traffic interests of the UE and beam quality measurement reports of the UE to a base station. The transceiver is configured to receive a multicast control channel (multicast control channel, MCCH) and a beam scan configuration from the base station related to the traffic interest of the UE. The processor is configured to monitor the MCCH and beam scanning configuration related to the traffic interest of the UE.

In a fourth aspect of the present invention, a base station includes: a memory, a transceiver, and a processor are coupled to the memory and the transceiver. The transceiver is configured to receive traffic interests of one or more User Equipments (UEs) and beam quality measurement reports of the one or more UEs from the one or more UEs. The processor is configured to determine a multicast control channel (multicast control channel, MCCH) and a beam scanning configuration related to the traffic interests of the one or more UEs based on the traffic interests of the one or more UEs and the beam quality measurement reports of the one or more UEs. The processor is configured to configure a multicast control channel, MCCH, and beam scan configuration to the one or more UEs related to the traffic interests of the one or more UEs.

In a fifth aspect of the application, a non-transitory machine-readable storage medium having instructions stored thereon, which when executed by a computer, cause the computer to perform the above-described method.

In a sixth aspect of the application, there is provided a chip comprising a processor configured to invoke and run a computer program stored in a memory to cause a device on which the chip is mounted to perform the above method.

In a seventh aspect of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program causes a computer to execute the above-described method.

In an eighth aspect of the application, a computer program product is provided, comprising a computer program, wherein the computer program causes a computer to perform the above method.

In a ninth aspect of the present application, there is provided a computer program for causing a computer to execute the above method.

Drawings

In order to more clearly illustrate the embodiments of the present application or related art, the drawings in the embodiments are briefly described below. It is evident that the figures are only some embodiments of the application, from which a person skilled in the art can obtain other figures without paying attention.

Fig. 1 is a block diagram of one or more User Equipment (UE) and a base station (e.g., a gNB) communicating in a communication network system according to an embodiment of the invention.

Fig. 2 is a flowchart illustrating a wireless communication method for MBS performed by a UE according to an embodiment of the present invention.

Fig. 3 is a flowchart illustrating a wireless communication method for MBS performed by a base station according to an embodiment of the present invention.

Fig. 4 is a diagram illustrating an example of a wireless communication method for MBS performed by a base station and one or more UEs according to an embodiment of the present invention.

Fig. 5 is a diagram illustrating an example of a wireless communication method for MBS performed by one or more UEs according to an embodiment of the present invention.

Fig. 6 is a schematic diagram illustrating an example of a wireless communication method for MBS performed by a base station according to an embodiment of the present invention.

Fig. 7 is a diagram illustrating an example of an MCCH configuration and SSB or beam association configuration based on UE reporting according to an embodiment of the present invention.

Fig. 8 is a diagram illustrating an example of a single MCCH configuration according to an embodiment of the present invention.

Fig. 9 is a diagram illustrating an example of a multi-MCCH configuration according to an embodiment of the present invention.

Fig. 10 is a diagram illustrating an example of MBS control channel configuration based on UE traffic interest and beam reporting according to an embodiment of the present invention.

Fig. 11 is a diagram illustrating a configuration example of an MCCH according to an embodiment of the present invention.

Fig. 12 is a diagram illustrating an example of association between PDCCH timing and SSB in an MCCH search space according to an embodiment of the present invention.

Fig. 13 is a diagram illustrating an example of association between PDCCH timing and SSB in an MCCH search space according to an embodiment of the present invention.

Fig. 14 is a block diagram of a wireless communication system according to an embodiment of the present invention.

Detailed Description

The technical matters, structural features, achieved objects and effects of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In particular, the terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Multicast/broadcast services (MBS) are expected to cover the diversity of 5G applications and services from public safety, mission critical, V2X, transparent IPv4/IPv6 multicast delivery, IPTV, wireless software delivery to group communication and internet of things applications. These applications and services have various requirements in terms of latency (e.g., mission critical and V2X) and reliability (i.e., lossless transmission, e.g., software delivery). Most importantly, it is likely that multiple sets of these applications and services may be provided to UEs within the MBS service area simultaneously, except for the possibility that the UE's interest in these provided services may fluctuate over time. In order to provide flexible scheduling, supporting both diversity of 5G MBS services and dynamic of user distribution and dynamic of user traffic interest variation within a service area, some embodiments of the present invention provide a new method that provides efficient scheduling to better transmit and receive 5G MBS with multi-beam operation and flexible Control Plane (CP) configuration, meeting different requirements of different 5G NR MBS services.

Fig. 1 illustrates that in some embodiments, one or more User Equipments (UEs) 10 and base stations (e.g., gnbs) 20 for communicating in a communication network system 30 are provided in accordance with an embodiment of the invention. The communication network system 30 includes one or more UEs 10 and a base station 20. One or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement the proposed functions, processes and/or methods described in the present specification. The radio interface protocol layer may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled to the processor 11 or 21 and stores various information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled to the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives radio signals.

The processor 11 or 21 may include an Application Specific Integrated Circuit (ASIC), other chipset, logic circuit, and/or data processing device. Memory 12 or 22 may include Read Only Memory (ROM), random Access Memory (RAM), flash memory, memory cards, storage media, and/or other storage devices. The transceiver 13 or 23 may include baseband circuitry that processes radio frequency signals. When the embodiments are implemented in a program, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules may be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 may be implemented within the processor 11 or 21 or external to the processor 11 or 21, in which case they can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.

In some embodiments, the processor 11 is configured to report to the base station 20 the traffic interests of the UE 10 and the beam quality measurement reports of the UE 10. The transceiver 13 is configured to receive from the base station 20 a Multicast Control Channel (MCCH) and beam scan configuration related to the traffic interest of the UE 10. The processor 11 is configured to monitor MCCH and beam scanning configurations related to traffic interests of the UE 10. This may solve the problems in the prior art, provide flexible MBS scheduling, provide separate control plane scheduling for different MBS services, reduce signaling overhead, reduce UE complexity, and/or provide good communication performance.

In some embodiments, the transceiver 23 is configured to receive from one or more UEs 10 the traffic interests of the one or more UEs 10 and the beam quality measurement reports of the one or more UEs 10. The processor 21 is configured to determine a Multicast Control Channel (MCCH) and a beam scanning configuration associated with the traffic interests of the one or more UEs 10 based on the traffic interests of the one or more UEs 10 and the beam quality measurement reports of the UEs 10. The processor 21 is configured to configure one or more UEs 10 with Multicast Control Channels (MCCHs) and beam scan configurations related to traffic interests of the one or more UEs 10. This may solve the problems in the prior art, provide flexible MBS scheduling, provide separate control plane scheduling for different MBS services, reduce signaling overhead, reduce UE complexity, and/or provide good communication performance.

Fig. 2 illustrates a wireless communication method 200 for a multicast/broadcast service (MBS) performed by a User Equipment (UE) according to an embodiment of the present invention. In some embodiments, the method 200 includes: step 202, reporting service interests of the UE and beam quality measurement reports of the UE to the base station, and step 204, receiving Multicast Control Channel (MCCH) and beam scanning configuration related to the service interests of the UE from the base station; in step 206, the MCCH and beam scanning configuration associated with the traffic interests of the UE are monitored. This may solve the problems in the prior art, provide flexible MBS scheduling, provide separate control plane scheduling for different MBS services, reduce signaling overhead, reduce UE complexity, and/or provide good communication performance.

Fig. 3 illustrates a wireless communication method 300 for a multicast/broadcast service (MBS) performed by a base station according to an embodiment of the present invention. In some embodiments, the method 300 includes: step 302, receiving traffic interests of one or more User Equipments (UEs) and beam quality measurement reports of the one or more UEs, step 304, determining Multicast Control Channels (MCCHs) and beam scanning configurations related to the traffic interests of the one or more UEs based on the traffic interests of the one or more UEs and the beam quality measurement reports of the one or more UEs; step 306, configuring a Multicast Control Channel (MCCH) and a beam scanning configuration associated with the traffic interests of the one or more UEs to the one or more UEs. This may solve the problems in the prior art, provide flexible MBS scheduling, provide separate control plane scheduling for different MBS services, reduce signaling overhead, reduce UE complexity, and/or provide good communication performance.

In some embodiments, the beam quality measurement report of the UE includes at least one of: UE best beam reporting; uplink channel state information reference signals (CSI-RS); or the measurement quality of the uplink Sounding Reference Signal (SRS). In some embodiments, the beam quality measurement report of the UE is periodic, semi-static, or aperiodic, and/or the uplink CSI-RS is used for the UE in Radio Resource Control (RRC) connected mode, and includes a Reference Signal Received Power (RSRP) measurement of the beam, a Reference Signal Received Quality (RSRQ) measurement of the beam, or a Channel Quality Indicator (CQI) measurement of the beam and/or a measurement quality of the uplink SRS is used for the UE in RRC idle/inactive mode. In some embodiments, the base station configures MCCH and beam scan configuration to the UE through RRC signaling or Downlink Control Information (DCI) periodically, semi-statically, or dynamically according to UE reporting. In some embodiments, the base station determines the MCCH and beam scanning configuration by configuring the MCCH and beam scanning configuration based on a single MCCH or multiple MCCHs. In some embodiments, the base station is configured to configure a single MCCH for each cell or each region under the base station to provide a point-to-multipoint (PTM) Control Plane (CP) scheduling configuration for a group common (gc) -PDCCH or gc Physical Downlink Shared Channel (PDSCH) for scheduling Multicast Traffic Channels (MTCHs) carrying MBS traffic. In some embodiments, a base station is configured to configure multiple MCCHs per cell or per region under the base station to provide a PTM CP scheduling configuration for scheduling gc-PDCCH or gc-PDSCH of a Multicast Traffic Channel (MTCH) carrying MBS traffic. In some embodiments, the base station determines the MCCH and beam scan configuration by: MCCH within a System Information Block (SIB) defined by the configured MBS, a Radio Network Terminal Identifier (RNTI) configured for MCCH scheduling, and/or an RNTI configured for MCCH modification notification scheduling. In some embodiments, the base station is configured to configure a fixed RNTI for MCCH scheduling if there is one MCCH per cell or per region under the base station (e.g., a gNB distribution unit or region under a gNB-DU) to provide PTM CP scheduling configuration of MBS services.

In some embodiments, the base station is configured to configure multiple fixed MCCH RNTIs for scheduling of multiple MCCH schedules, each MCCH RNTI corresponding to one MCCH to provide PTM CP scheduling configuration of MBS services if multiple MCCHs are configured per cell or per region under the base station (e.g., a gNB distribution unit or region under a gNB-DU). In some embodiments, the base station is configured to flexibly configure a plurality of MCCH RNTIs, and provide PTM CP scheduling configuration for MBS services according to the number of MCCHs flexibly configured per cell or per region under the base station. In some embodiments, the base station determines the MCCH and beam scan configuration by: the association between MCCH search space, PDCCH occasion and Synchronization Signal Block (SSB) is configured for the scheduling of MCCH within MBS SIB.

In some embodiments, the base station determines the MCCH and beam scan configuration by: and configuring the association between the MCCH scheduling and/or MCCH change notification, the PDCCH opportunity and the SSB, and scanning the MCCH scheduling and/or MCCH change notification to the SSB direction. In some embodiments, the base station is configured to configure a new RNTI for MCCH change notification of MBS without additional information (e.g., bit map) for MCCH and region association as in LTE. In some embodiments, the base station is configured to use some additional information (e.g., an x-bit bitmap, where x e 2,4,8,16,32, etc.) to configure a new RNTI for the MCCH change notification for the MCCH associated with the best quality beam of the UE and/or the service interest of the UE.

Fig. 4 illustrates an example of a wireless communication method for MBS performed by a base station and one or more UEs according to an embodiment of the present invention. Fig. 5 illustrates an example of a wireless communication method for MBS performed by one or more UEs according to an embodiment of the present invention. Fig. 6 illustrates an example of a wireless communication method for MBS performed by a base station according to an embodiment of the present invention. Fig. 4-6 illustrate that in some embodiments, to enable flexible scheduling to support diversity of 5G MBS services and dynamic of user distribution within a service area and dynamic of user traffic interest changes, some embodiments of the present invention provide a new method/mechanism that utilizes multi-beam operation and flexible Control Plane (CP) configuration to provide efficient scheduling to handle different needs of different 5G NR MBS services. In some embodiments, one or more UEs report their/their traffic interests and their beam quality measurement reports to the network/gNB. After collecting the beam quality measurements and traffic interest related information from one or more UEs, the base station (e.g., the gNB) determines the appropriate MBS Control Plane (CP) configuration (i.e., the per-UE traffic interest related MCCH scheduling configuration and beam related configuration) needed to schedule MBS user plane traffic for each UE. Thereafter, the base station (e.g., gNB) provides the one or more UEs with the service-related MCCH scheduling and configuration of interest and the optimal beam scanning configuration. After receiving the scheduling configuration from the gNB, each UE monitors only the MCCH configuration associated with the traffic that the UE is interested in receiving.

In some embodiments, the beam quality measurement report of the UE includes at least one of: UE best beam reporting; uplink channel state information reference signals (CSI-RS), e.g., reference Signal Received Power (RSRP) measurements of a beam, reference Signal Received Quality (RSRQ) measurements of a beam, or Channel Quality Indicator (CQI) measurements of a beam (i.e., for a Radio Resource Control (RRC) connected UE); or the quality of measurement of the uplink Sounding Reference Signal (SRS) (i.e., for RRC idle/inactive UEs). Optionally, the beam quality measurement report of the UE is periodic. Optionally, the beam quality measurement report of the UE is semi-static. Optionally, the beam quality measurement report of the UE is aperiodic.

In some embodiments, the UE receives the MCCH and beam scan configuration from the base station periodically, semi-statically, or dynamically through RRC signaling or Downlink Control Information (DCI). In detail, in some embodiments, the MCCH and beam scanning configuration is provided to the UE by a base station (e.g., a gNB). Alternatively, the MCCH and beam scan configuration may send the number of UEs periodically (e.g., every 5ms, 10ms, 20ms, etc.) or semi-statically or dynamically based on reports on RRC signaling or Downlink Control Information (DCI).

In some embodiments, the base station determines the MCCH and beam scan configuration by: the base station maps quality of service (QoS) flows of different MBS services of the services of interest to the plurality of UEs into the same MBS or Multicast Radio Bearer (MRB) if the plurality of UEs within the beam are interested in receiving the same set of services. In some embodiments, the base station determines the MCCH and beam scan configuration by: a separate MCCH is configured for each MRB to ensure that each UE may be configured to monitor the MCCH carrying the schedule of the MRBs associated with QoS flows of one or more services that the UE is interested in receiving. In some embodiments, the base station determines the MCCH and beam scan configuration by: the base station configures a plurality of beams and configures a single MCCH and/or MCCH modification notification with different scheduling configurations including different modification periods and repetition periods according to beam quality measurement reports of one or more UEs, supporting scheduling of MRBs configured for each beam. In some embodiments, the base station determines the MCCH and beam scan configuration by: the scheduling configuration is notified by the base station for each configured MCCH and/or MCCH modification, a specific RNTI with an additional bitmap is configured, and the scheduling is associated with the monitoring occasion.

In some embodiments, the base station determines the MCCH and beam scan configuration by: configuring each of the MCCH and/or MCCH change notification schedule configuration monitoring occasions with a configuration, a set of PDCCH repetitions associated with each monitoring occasion, and associating each PDCCH repetition with an SSB. In some embodiments, the base station determines the MCCH and beam scan configuration by: the base station configures beam scanning for MCCH and/or MCCH modification notification scheduling configuration to the direction of the associated SSB by scanning the configured PDCCH to the associated SSB beam direction. In some embodiments, the base station determines the MCCH and beam scan configuration by: one or more UEs are configured to acquire only one PDCCH to receive a configured MCCH or MCCH modification notification associated with a traffic interest of the one or more UEs. In some embodiments, the base station determines the MCCH and beam scan configuration by: a plurality of beams are configured by a base station based on beam quality measurement reports of one or more UEs, and a plurality of MCCHs are configured, each MCCH having a different scheduling configuration including a modification period and a repetition period, supporting scheduling of MRBs configured for each beam.

Fig. 7 illustrates an example of an MCCH configuration and SSB or beam association configuration based on UE reporting according to an embodiment of the present invention. In some embodiments, the appropriate control plane scheduling as shown in fig. 4 may be performed including at least one of: configuring an appropriate control plane schedule based on a single/one MCCH (i.e., having different modification periods and repetition periods) or a plurality of MCCHs (each MCCH having different modification periods and repetition periods, etc.); configuring an appropriate scheduling pattern for the configured MCCH, a Radio Network Terminal Identifier (RNTI) configuration for MCCH scheduling, and/or an RNTI for MCCH notification change scheduling within a MBS-defined System Information Block (SIB); configuring an association between an MCCH search space (i.e., in a System Information Block (SIB)), a Physical Downlink Control Channel (PDCCH) occasion, and a Synchronization Signal Block (SSB) for scheduling the MCCH within an MBS SIB; or configuring the association between the MCCH scheduling and/or MCCH change notification, the PDCCH opportunity and the SSB, and scanning the MCCH scheduling and/or MCCH change notification to a specific SSB direction.

In detail, in some embodiments, MCCH and beam scanning configuration related to traffic interest provided by the gNB to the UE may be sent periodically (e.g., every 5ms, 10ms, or 20 ms), etc.) or semi-statically or dynamically based on the UE's reports on RRC signaling or downlink DCI.

In detail, in some embodiments, an appropriate Control Plane (CP) scheduling configuration is shown in fig. 7, including at least one of:

an appropriate Control Plane (CP) schedule is configured based on a single/one MCCH (i.e., having different modification periods and repetition periods, etc.) or a plurality of MCCHs (each having different modification periods and repetition periods, etc.).

The MCCH configured within the MBS-defined System Information Block (SIB), the RNTI configuration for MCCH scheduling, and/or the RNTI configuration for MCCH modification notification scheduling configure an appropriate scheduling mode.

The association between MCCH search space (i.e., in SIB), PDCCH occasion and SSB is configured to schedule MCCH within MBS SIB.

The association between MCCH scheduling/MCCH modification notification, PDCCH timing and Synchronization Signal Block (SSB) is configured for scanning MCCH scheduling and/or MCCH modification notification to a specific SSB direction.

Regarding NR MBS PTM configuration Control Plane (CP) scheduling, MBS may employ an SC-PTM based two-step scheduling method, i.e. scheduling of MBS channel control planes for providing MBS services by providing a scheduling configuration regarding the location of Multicast Control Channels (MCCHs) on SIBs of the BCCH bearer. The main benefit of the above two-step configuration is to provide a separate MCCH scheduling independent of SIB scheduling, providing different scheduling configurations for different MBS services with more flexibility in terms of e.g. repetition period, duration and modification period. Fig. 8 illustrates an example of a single MCCH configuration according to an embodiment of the present invention. Fig. 9 illustrates an example of a multi-MCCH configuration according to an embodiment of the present invention. Referring to fig. 8 and 9, in some embodiments, handling different requirements for different MBS services in NR MBS delivery mode 2, the following options may be configured by the network (e.g., base station (e.g., gNB)) based on interests collected from UE reports or information related to service interests provided by the core network.

Option 1: the network may configure a single MCCH for each cell (or region under each gcb-DU) to provide PTM Control Plane (CP) scheduling configuration for gc-PDCCH/gc-PDSCH scheduling/carrying MTCH carrying MBS traffic, as shown in fig. 8.

Option 2: the network may configure multiple MCCHs for each cell (or each region under the gNB-DU) to provide PTM Control Plane (CP) scheduling configuration for the scheduled/carried gc-PDCCH/gc-PDSCH, with the MTCH carrying MBS traffic as shown in fig. 9.

In some embodiments, in the case of multiple MCCHs, in order for a base station (e.g., a gNB) to determine the appropriate number of MCCHs that can be configured to schedule MBS traffic of interest to different UEs within a beam, the base station (e.g., a gNB) needs some knowledge of how to map these traffic to radio bearers, since from a data plane scheduling perspective, the radio bearers are the only channels available between the UE and the base station (e.g., a gNB). For the 5G NR QoS model for unicast transmission defined in TS23.501, 5GC and NG-RAN ensure Downlink (DL) QoS by mapping DL packets to appropriate QoS flows and then mapping to radio bearers in two stages. In some examples, in the first stage, the 5GC associates DL packets of different traffic with QoS flows and QoS Flow Identifiers (QFI). In some examples, in the second phase, the NG-RAN maps DL QoS flows of different traffic to different Data Radio Bearers (DRBs). For NR MBS, the mapping between the MBSDL QoS flows and MBS or Multicast Radio Bearers (MRBs) has been agreed in RAN2-112e to require QoS flow-to-radio bearer mapping functionality in the Service Data Adaptation Protocol (SDAP). Thus, the base station (e.g., gNB) may utilize knowledge of the UE's traffic interests, either reported by the UE or acquired from the 5G core (e.g., multicasting), to map the MBSDL OoS flows to the appropriate MBS Radio Bearer (MRB) SDAP functions using the following method. If multiple UEs within a beam are interested in receiving these same traffic sets, the mapping may be in such a way: the base station (e.g., gNB) maps the OoS flows of different MBS services to the same MRB. In this way, the base station (e.g., the gNB) may configure a separate MCCH for each MRB (i.e., the number of MCCHs per beam/cell is associated with the number of MRBs configured per beam/cell). This may ensure that each UE may be configured to monitor the MCCH carrying the schedule of MRBs associated with QoS flows of one or more services that the UE is interested in receiving.

Fig. 10 illustrates an example of MBS control channel configuration based on UE traffic interest and beam reporting according to an embodiment of the present invention. For example, referring to fig. 10, for the first beam, three MCCHs are configured for three services (e.g., service 1, service 2, and service 3), assuming that their QoS flows are mapped to three MRBs. For example, for the second beam, a single MCCH is configured for a single MRB and for traffic (e.g., for traffic 1). For example, for the third beam, since QoS flows associated with two services (e.g., service 1 and service 2) are mapped to a single MRB, only two MCCHs are configured because all UEs in the third beam are interested in receiving these services (e.g., as service 1 and service 2).

Fig. 11 illustrates an example of a configuration of an MCCH according to an embodiment of the present invention. Fig. 11 illustrates that in some embodiments, the LTE method may be reused for NR efficient scheduling of MCCHs within a SIB. Consider that the granularity of scheduling in NR is one slot. Thus, a base station (e.g., gNB) may configure MBS-specific system information blocks (e.g., MBS SIBs or M-SIBs) with appropriate transmission windows to carry MCCHs. The configuration of the transmission window may affect the configuration of the MCCH repetition period (i.e., the plurality of NR slots), the MCCH modification period, the MCCH radio frame offset with reference to the System Frame Number (SFN) boundary, the first slot of the MCCH may be scheduled in a radio frame, and the duration of the MCCH (e.g., in number of slots) may be scheduled as shown in fig. 11.

Scheduling of MCCH:

according to LTE MBMS, SC-PTM uses SC-RNTI with a fixed value to schedule transmission of SC-MCCH messages. Due to the fact that NR MBS is also scheduled within a cell, NR MBS may take a similar configuration, but should consider the fact that multiple MCCHs or a single MCCH may be used. Thus, in some embodiments of the invention, the following options may be considered for the RNTI of the MCCH schedule in the NR MBS.

Option 1: the network/base station (e.g., the gNB) may configure a fixed RNTI for MCCH scheduling if there is one MCCH per cell (or per region under the gNB) to provide PTM control plane scheduling configuration for MBS services.

Option 2: the network/base station (e.g., the gNB) may configure multiple fixed MCCH-RNTIs for scheduling of multiple MCCH schedules, each MCCH RNTI corresponding to one MCCH if each cell (or each region under the gNB) configures multiple MCCHs to provide PTM control plane scheduling configuration for MBS services.

Option 3: the network/base station (e.g., the gNB) can flexibly configure the number of MCCH-RNTIs, and provide PTM control plane scheduling configuration for MBS services according to the flexibly configured number of MCCHs per cell (or per region under the gNB).

MCCH change notification:

in LTE, the modification notification of the single cell MCCH (SC-MCCH) uses the DCI formats of the newly introduced SC-N-RNTI and M-RNTI for the SC-N-RNTI, but only one bit in the 8-bit bitmap is used considering that only one SC-MCCH is used for the SC-PTM in one cell. The SC-MCCH modification notification scrambled by the SC-N-RNTI may be transmitted in the first subframe of the MCCH transmission window informing about the change of the scheduled SC-MCCH in the same subframe. For NR MBS, the "assume MCCH change notification mechanism is agreed in RAN2#113e to notify of the change of MCCH configuration (other case FFS, if any) due to session initiation of transmission mode 2 of NR MBS". Therefore, in some embodiments of the present invention, for the modification notification of the NR MBS, based on the LTE SC-PTM mechanism, the MCCH modification notification procedure has the following options:

Option 1: the network/base station (e.g., gNB) may configure a new RNTI for MCCH change notification of NR MBS without additional information such as an 8-bit bitmap used in LTE.

Option 2: the base station (e.g., the gNB) may configure the MCCH change notification with a new RNTI as well as some additional information, e.g., an 8-bit bitmap for the MCCH associated with the beam and/or UE traffic of interest.

Association between MCCH search space (in SIB), PDCCH occasion and SSB:

in NR, PDCCH occasions are associated with Synchronization Signal Blocks (SSBs) in a predefined manner for search spaces of common channels such as Broadcast Control Channel (BCCH) and Paging Control Channel (PCCH). Thus, the network/base station (e.g., the gNB) may scan the PDCCH in the beam direction associated with the SSB. In this way, if the UE knows the predefined mapping, the UE can receive a System Information (SI) message and page on PDCCH occasions according to the SSB it detects, for power saving purposes. For NR MBS, MCCHs are also common channels, which are very similar to BCCH, MCCHs only carry different control messages (i.e. broadcast channel/multicast scheduling). Thus, in some embodiments of the invention, for the search space of MCCH, the network/base station (e.g., the gNB) may configure PDCCH occasions for the MCCH search space (i.e., in MBS SIBs) and associate them with SSBs in a predefined manner so that the UE may receive MCCH scheduling on PDCCH occasions within the SIBs according to the SSBs it detects to save power.

Association between MCCH scheduling/MCCH modification notification, PDCCH occasion and SSB:

beam scanning has been agreed for NR MBS user plane data scheduling as described according to RAN1 103 protocol: for rrc_idle/rrc_inactive UEs, the group common PDCCH/PDSCH supports beam scanning. For efficient unified service scheduling of MBS services, the user control plane scheduling may also support multi-beam operation. To support beam scanning and MCCH modification notification for MCCH, a repeated set of PDCCH and/or MCCH modification notifications may be configured for monitoring occasions of MCCH scheduling and may be associated with SSBs for scanning MCCH scheduling and/or MCCH modification notifications to specific directions. However, the association configuration needs to consider the design and configuration of MCCH (e.g., single MCCH and multiple MCCH configurations) and the association of MCCH with the service of interest to the UE, as described in detail in some embodiments below.

Single MCCH configuration:

fig. 12 illustrates an example of association between PDCCH occasions and SSBs in an MCCH search space according to an embodiment of the present invention. Fig. 12 illustrates that, in some embodiments, for a single MCCH configuration, the network/gcb may configure multiple beams based on the beam measurement quality reported by the UE and configure a single MCCH and/or MCCH change notification with different scheduling configurations (e.g., different modification periods and repetition periods, etc.), support scheduling of MRBs configured for each beam in order to support scheduling of multiple configured MRBs within a beam, as shown in the above embodiments. The network/gNB may schedule configuration for each configured MCCH and/or MCCH change notification, configure a specific RNTI with an additional bitmap (e.g., 8-bit bitmap), and associate the schedule with a monitoring occasion. The network/gNB may configure a monitoring occasion for each configured MCCH and/or MCCH change notification scheduling configuration, a set of PDCCH repetitions associated with the monitoring occasion, and associate each PDCCH repetition with one SSB. The network/gNB may configure the beam scanning of the MCCH and/or the MCCH modification notification scheduling configuration to the direction of the associated SSB by scanning the configured PDCCH to the associated SSB beam direction. Thus, the UE may receive the MCCH configuration or MCCH modification notification only by acquiring 1 PDCCH. However, using only the above configuration, the UE within the beam will eventually monitor multiple MCCHs. To avoid this, in some embodiments of the invention, the network/base station (e.g., the gNB) may use additional information, e.g., an 8-bit bitmap, to distinguish MCCH scheduling configurations for different services within the same beam for which different UEs use the same MCCH schedule.

A plurality of MCCH configurations:

fig. 13 illustrates an example of association between PDCCH occasions and SSBs in an MCCH search space according to an embodiment of the present invention. Fig. 13 illustrates that, in some embodiments, for multiple MCCH configurations, the network/gNB may configure multiple beams and multiple MCCHs and/or MCCH change notifications based on the beam measurement quality reported by the UE, each MCCH and/or MCCH change notification having a different scheduling configuration (e.g., modification period and repetition period, etc.), supporting scheduling of MRBs configured for each beam. The network/gNB may configure RNTI for each of the configured MCCHs and/or MCCH change notifications and associate each with a monitoring occasion. The network/gNB may configure a set of PDCCH repetitions and associate each PDCCH repetition with one SSB for configuration monitoring occasions of configured MCCH and/or MCCH change notifications. The network/gNB may configure beam scanning for MCCH and/or MCCH change notifications in the direction of the associated SSB by scanning the configured PDCCH to the associated SSB beam direction. Therefore, the UE can receive the configured MCCH scheduling or MCCH modification notification only by acquiring 1 PDCCH. Because the configured MCCH schedule or MCCH change notification is associated with the MRB carrying the service of interest to the UE, the UE can only acquire the MCCH providing the service of interest to the UE even though the UE blindly monitors the PDDCH.

In summary, in some embodiments, the main advantages and innovative aspects of the new flexible MBS control plane scheduling mechanism include, but are not limited to, compared to the prior art reported by most proposals submitted to RAN-13e, such as reuse of LTE MBMS SC-PTM mechanism:

1. in some embodiments, the new method provides flexible MBS scheduling capable of supporting diversity of 5G MBS services and dynamic of user distribution within the service area and dynamic of user service interest variation as required by the 3GPP document of NR MBS.

2. In some embodiments, the new approach provides separate control plane scheduling for different MBS services, which helps to reduce signaling overhead, e.g., for delay tolerant services if these services are scheduled together and delay sensitive services are configured together using the same control plane configuration and scheduling.

3. In some embodiments, the new method allows the UE to monitor only MCCH configurations associated with traffic that the UE is interested in receiving, and this may help reduce UE complexity.

The commercial benefits of some embodiments are as follows. 1. The problems in the prior art can be solved. 2. Providing flexible MBS scheduling. 3. Separate control plane scheduling is provided for different MBS services. 4. The signaling overhead is reduced. 5. And the complexity of the UE is reduced. 6. Providing good communication performance. 7. Some embodiments of the invention are implemented by 5G-NR chipset suppliers, V2X communication system development suppliers, automotive manufacturers including cars, trains, trucks, buses, bicycles, motorcycles, helmets, etc., unmanned aerial vehicles (unmanned aerial vehicles), smart phone manufacturers, public safety communication devices, AR/VR device manufacturers, such as games, meetings/seminars, educational objectives. Some embodiments of the invention are a combination of "technologies/procedures" that may be employed in the 3GPP specifications to create the end product. Some embodiments of the invention may be employed in 5G NR licensed and unlicensed or shared spectrum communications. Some embodiments of the invention propose a technical mechanism.

Fig. 14 is a block diagram of a system 700 for wireless communication according to an embodiment of the present invention. The embodiments described herein may be implemented in a system using any suitable configuration of hardware and/or programming. Fig. 14 illustrates an example system 700 for one embodiment that includes Radio Frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory/storage 740, display 750, camera 760, sensor 770, and input/output (I/O) interface 780 coupled to one another at least as shown. Application circuitry 730 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. A processor may comprise any combination of general-purpose processors and special-purpose processors, such as graphics processors, application processors, and the like. The processor may be coupled with the memory/storage device and configured to execute instructions stored in the memory/storage device to enable various applications and/or operating systems running on the system.

Baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor may comprise a baseband processor. The baseband circuitry may handle various radio control functions that enable communication with one or more radio networks via the RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, and the like. In some embodiments, baseband circuitry may provide communications compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry may support communication with an Evolved Universal Terrestrial Radio Access Network (EUTRAN) and/or other Wireless Metropolitan Area Networks (WMANs), wireless Local Area Networks (WLANs), wireless Personal Area Networks (WPANs). Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

In various embodiments, baseband circuitry 720 may include circuitry that operates with signals that are not strictly considered to be at baseband frequencies. For example, in some embodiments, the baseband circuitry may include circuitry that operates with signals having intermediate frequencies between baseband frequencies and radio frequencies. The RF circuitry 710 may use modulated electromagnetic radiation transmitted through a non-solid medium to effect communication with a wireless network. In various embodiments, the RF circuitry may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. In various embodiments, RF circuitry 710 may include circuitry that operates with signals that are not strictly considered to be at radio frequencies. For example, in some embodiments, the RF circuitry may include circuitry that operates with signals having intermediate frequencies between baseband frequencies and radio frequencies.

In various embodiments, the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of RF circuitry, baseband circuitry, and/or application circuitry. As used herein, "circuitry" may refer to, be part of, or include the following: an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group) that execute one or more programs or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality. In some embodiments, the electronic device circuitry may be implemented in or the functions associated with one or more programs or firmware modules. In some embodiments, some or all of the baseband circuitry, application circuitry, and/or constituent elements of the memory/storage device may be implemented together on a system on a chip (SOC). Memory/storage 740 may be used to load and store information and/or instructions for the system, for example. The memory/storage device for one embodiment may comprise any combination of suitable volatile memory, such as Dynamic Random Access Memory (DRAM), and/or non-volatile memory, such as flash memory.

In various embodiments, I/O interface 780 may comprise one or more user interfaces designed to enable user interaction with the system and/or a peripheral interface designed to enable peripheral interaction with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touch pad, a speaker, a microphone, and the like. The peripheral device interface may include, but is not limited to, a non-volatile memory port, a Universal Serial Bus (USB) port, an audio jack, and a power interface. In various embodiments, the sensor 770 may comprise one or more sensing devices to determine environmental conditions and/or location information related to the system. In some embodiments, the sensors may include, but are not limited to, gyroscopic sensors, accelerometers, proximity sensors, ambient light sensors, and positioning units. The positioning unit may also be part of or interact with baseband circuitry and/or RF circuitry to communicate with elements of a positioning network, such as Global Positioning System (GPS) satellites.

In various embodiments, display 750 may include displays such as liquid crystal displays and touch screen displays. In various embodiments, system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, a ultrabook, a smart phone, and the like. In various embodiments, the system may have more or fewer elements, and/or different architectures. The methods described herein may be implemented as computer programs, as appropriate. The computer program may be stored on a storage medium such as a non-transitory storage medium.

It will be appreciated by those of skill in the art that each of the units, algorithms, and steps described and disclosed in the embodiments of the invention are implemented using electronic hardware, or a combination of programs and electronic hardware for computers. Whether a function is implemented as hardware or as a program depends on the conditions of the application and the design requirements of the technical project. One of ordinary skill in the art may implement the functionality for each particular application in different ways without such implementation exceeding the scope of the present invention. It will be understood by those of ordinary skill in the art that reference may be made to the operation of the systems, devices and units in the embodiments mentioned above, as the operation of the systems, devices and units mentioned above are essentially the same. For ease of description and simplicity, these operations will not be described in detail.

It should be appreciated that the systems, devices, and methods disclosed in the embodiments of the present invention may be implemented in other ways. The above-described embodiments are merely exemplary. The division of cells is based solely on logic functions, while other divisions actually exist. It is possible that multiple units or elements are combined or integrated in another system. Certain features may be omitted or skipped. On the other hand, the mutual coupling, direct coupling or communicative coupling shown or discussed operates through some ports, devices or units, whether indirectly or communicatively via electrical, mechanical or other types of forms.

The units used for illustration as separate elements may or may not be physically separate. The units used for display may or may not be physical units, i.e. located at one site or distributed over a plurality of network units. Some or all of the units are used according to the purpose of the embodiment. Furthermore, each functional unit in each embodiment may be integrated in one processing unit, physically separate, or integrated with two or more units in one processing unit.

If the program functional unit is implemented and used and sold as a product, it may be stored in a readable storage medium in a computer. Based on this understanding, the solution proposed by the invention can be implemented substantially or partly in the form of a program product. Alternatively, a part of the technical solution beneficial to the conventional technology may be implemented in the form of a program product. The program product in the computer is stored in a storage medium containing a plurality of commands for a computing device (e.g., a personal computer, a server, or a network device) to execute all or some of the steps disclosed in the embodiments of the present invention. The storage medium includes a flash drive, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a floppy disk, or other type of medium capable of storing program code.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but is intended to cover various arrangements included within the scope of the appended claims without departing from the broadest interpretation of the claims.

Claims (39)

1. A wireless communication method for multicast/broadcast service, MBS, performed by a user equipment, UE, the method comprising:

reporting the service interest of the UE to a base station and a beam quality measurement report of the UE;

receiving a multicast control channel MCCH and beam scanning configuration related to the traffic interest of the UE from the base station; and

monitoring the MCCH and beam scanning configuration related to the traffic interests of the UE.

2. The wireless communication method of claim 1, wherein the beam quality measurement report of the UE comprises at least one of: UE best beam reporting; an uplink channel state information reference signal (CSI-RS); or the measurement quality of the uplink sounding reference signal SRS.

3. The wireless communication method according to claim 2, characterized in that the beam quality measurement report of the UE is periodic, semi-static, or aperiodic and/or the uplink CSI-RS is used for the UE in radio resource control, RRC, connected mode and comprises reference signal received power, RSRP, measurement of the beam, reference signal received quality, RSRQ, measurement of the beam, or channel quality indicator, CQI, measurement of the beam and/or measurement quality of the uplink SRS is used for the UE in RRC idle/inactive mode.

4. The wireless communication method according to claim 1, characterized in that the UE receives from the base station the MCCH and beam scan configuration periodically, semi-statically or dynamically through RRC signaling or downlink control information DCI according to a report provided by the UE.

5. The wireless communication method according to claim 1, wherein the MCCH and beam scanning configuration comprises a configuration based on a single MCCH or a plurality of MCCHs.

6. The wireless communication method according to claim 1, wherein the MCCH and beam scanning configuration comprises an MCCH configured within a system information block SIB defined by an MBS, a radio network terminal identifier, RNTI, configuration for MCCH scheduling, and/or an RNTI for MCCH modification notification scheduling.

7. The wireless communication method according to claim 1, wherein the MCCH and beam scanning configuration comprises a configuration of an association between an MCCH search space, a physical downlink control channel PDCCH occasion and a synchronization signal block SSB for scheduling MCCHs within MBS SIBs.

8. The wireless communication method according to claim 1, wherein the MCCH and beam scanning configuration comprises a configuration of an association between MCCH scheduling and/or MCCH modification notification, PDCCH timing and SSB for scanning MCCH scheduling and/or MCCH modification notification to SSB direction.

9. A wireless communication method for multicast/broadcast service MBS, the method being performed by a base station, the method comprising:

receiving, from one or more user equipments, UEs, traffic interests of the one or more UEs and beam quality measurement reports of the one or more UEs;

determining a multicast control channel, MCCH, and beam scanning configuration related to the traffic interests of the one or more UEs based on the traffic interests of the one or more UEs and the beam quality measurement reports of the one or more UEs; and

the one or more UEs are configured with multicast control channels MCCH and beam scan configurations related to the traffic interests of the one or more UEs.

10. The wireless communication method of claim 9, wherein the base station determines the MCCH and beam scanning configuration by mapping quality of service QoS flows for different MBS services of the services of interest to a plurality of UEs within a beam into a same MBS or multicast radio bearer, MRB, if the plurality of UEs are interested in receiving the same set of services.

11. The wireless communication method of claim 9, wherein the base station determines the MCCH and beam scanning configuration by mapping quality of service QoS flows for different MBS services of the services of interest to a plurality of UEs within a beam into a same MBS or multicast radio bearer, MRB, if the plurality of UEs are interested in receiving the same set of services.

12. The wireless communication method according to claim 9, wherein the base station determines the MCCH and beam scan configuration by the base station configuring a plurality of beams based on the beam quality measurement reports of the one or more UEs and configuring a single MCCH and/or MCCH modification notification with different scheduling configurations, including different modification periods and repetition periods, to support scheduling of MRBs configured for each beam.

13. The wireless communication method according to claim 12, wherein the base station determines the MCCH and beam scan configuration by informing a scheduling configuration by the base station for each configured MCCH and/or MCCH modification, configuring a specific RNTI with an additional bitmap, and associating scheduling with monitoring occasions.

14. The wireless communication method according to claim 9, wherein the base station determines the MCCH and beam scan configuration by configuring a plurality of beams and configuring a plurality of MCCHs by the base station based on the beam quality measurement reports of the one or more UEs and/or each MCCH has a different scheduling configuration including a different modification period and repetition period to support scheduling of MRBs configured for each beam.

15. The wireless communication method according to claim 14, wherein the base station determines the MCCH and beam scan configuration by configuring RNTI for each configured MCCH and/or MCCH change notification by the base station without additional bitmaps and associating each with a monitoring occasion.

16. The wireless communication method of claim 9, wherein the base station determines the MCCH and beam scan configurations by configuring MCCH and/or MCCH modification notification schedule configuration monitoring occasions for each configuration, associating each monitoring occasion and repeating each PDCCH by a set of PDCCH repetitions associated with SSB.

17. The wireless communication method according to claim 9, wherein the base station determines the MCCH and beam scanning configuration by the base station configuring the beam scanning for MCCH and/or MCCH modification notification schedule configuration to the direction of the associated SSB by scanning the configured PDCCH to the associated SSB beam direction.

18. The wireless communication method of claim 9, wherein the base station determines the MCCH and beam scan configuration by configuring the one or more UEs to acquire only one PDCCH to receive configured MCCH or MCCH modification notification associated with traffic interests of the one or more UEs.

19. The wireless communication method of claim 9, wherein the beam quality measurement report of the UE comprises at least one of: UE best beam reporting; an uplink channel state information reference signal (CSI-RS); or the measurement quality of the uplink sounding reference signal SRS.

20. The wireless communication method according to claim 19, characterized in that the beam quality measurement report of the UE is periodic, semi-static, or aperiodic and/or the uplink CSI-RS is used for the UE in radio resource control, RRC, connected mode and comprises a reference signal received power, RSRP, measurement of the beam, a reference signal received quality, RSRQ, measurement of the beam, or a channel quality indicator, CQI, measurement of the beam and/or a measurement quality of the uplink SRS is used for the UE in RRC idle/inactive mode.

21. The wireless communication method according to claim 9, wherein the base station configures the MCCH and beam scan configuration to the UE periodically, semi-statically or dynamically through RRC signaling or downlink control information DCI.

22. The wireless communication method according to claim 9, wherein the base station determines the MCCH and beam scanning configuration by configuring the MCCH and beam scanning configuration based on a single MCCH or a plurality of MCCHs.

23. The wireless communication method according to claim 22, wherein the base station is configured to configure a single MCCH per cell or per region under the base station comprising a region under a gNB distribution unit, providing a point-to-multipoint PTM control plane CP scheduling configuration for a group common (gc) -PDCCH or gc-physical downlink shared channel PDSCH for scheduling multicast traffic channels MTCH carrying MBS traffic.

24. The wireless communication method according to claim 22, wherein the base station is configured to configure a plurality of MCCHs per cell or per region under the base station including a region under a gNB distribution unit, providing PTM CP scheduling configuration for gc-PDCCH or gc-PDSCH scheduling multicast traffic channel MTCH carrying MBS traffic.

25. The wireless communication method according to claim 9, wherein the base station determines the MCCH and beam scanning configuration by configuring the MCCH in a MBS defined system information block SIB, configuring a radio network terminal identifier, RNTI, for MCCH scheduling and/or configuring an RNTI for MCCH modification notification scheduling.

26. The wireless communication method according to claim 25, wherein if a single MCCH exists for each cell or each region under the base station, the base station is configured to configure a fixed RNTI for MCCH scheduling to provide PTM CP scheduling configuration for MBS services.

27. The wireless communication method according to claim 25, wherein the base station is configured to configure a plurality of fixed MCCH RNTIs for scheduling of a plurality of MCCH schedules, and if a plurality of MCCHs are configured per cell or per zone under the base station including an area under a gNB distribution unit, each MCCH RNTI corresponds to one MCCH to provide PTM CP schedule configuration for MBS services.

28. The wireless communication method according to claim 25, wherein the base station is configured to flexibly configure the number of MCCH RNTIs to provide PTM CP scheduling configurations for MBS services according to the number of flexibly configured MCCHs per cell or per region contained by an area under a gNB distribution unit of the base station.

29. The wireless communication method of claim 9, wherein the base station determines the MCCH and beam scanning configuration by configuring an association between MCCH search space, PDCCH timing and synchronization signal block SSB for scheduling of MCCHs within MBS SIBs.

30. The wireless communication method according to claim 9, wherein the base station determines the MCCH and beam scanning configuration by configuring an association between MCCH scheduling and/or MCCH modification notification, PDCCH timing and SSB for scanning the MCCH scheduling and/or MCCH modification notification to a specific direction.

31. The wireless communication method according to claim 9, wherein the base station is configured to configure a new RNTI for the MCCH change notification of the MBS without additional information.

32. The wireless communication method according to claim 9, characterized in that the base station is configured to use some additional information for MCCH associated with the best quality beam of the UE and/or the service interest of the UE to configure a new RNTI for MCCH modification notification.

33. A user equipment, UE, comprising:

a memory;

a transceiver; and

a processor is coupled to the memory and the transceiver;

wherein the processor is configured to perform the method of any one of claims 1 to 8.

34. A base station, comprising:

a memory;

a transceiver; and

a processor is coupled to the memory and the transceiver;

wherein the processor is configured to perform the method of any one of claims 9 to 32.

35. A non-transitory machine readable storage medium having instructions stored thereon, which when executed by a computer, cause the computer to perform the method of any of claims 1 to 32.

36. A chip, comprising:

a processor configured to invoke and run a computer program stored in a memory to cause a device on which the chip is installed to perform the method of any of claims 1 to 32.

37. A computer readable storage medium, characterized in that a computer program is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1 to 32.

38. A computer program product comprising a computer program, wherein the computer program causes a computer to perform the method of any one of claims 1 to 32.

39. A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 32.