WO2024032221A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2024032221A1
WO2024032221A1 PCT/CN2023/104065 CN2023104065W WO2024032221A1 WO 2024032221 A1 WO2024032221 A1 WO 2024032221A1 CN 2023104065 W CN2023104065 W CN 2023104065W WO 2024032221 A1 WO2024032221 A1 WO 2024032221A1
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Prior art keywords
mcch
message
terminal device
information
mcch modification
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PCT/CN2023/104065
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English (en)
Chinese (zh)
Inventor
张海森
李秉肇
许斌
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华为技术有限公司
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Publication of WO2024032221A1 publication Critical patent/WO2024032221A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

Definitions

  • the embodiments of the present application relate to the field of communication, and more specifically, to a communication method and a communication device.
  • Multicast and Broadcast Service is a service for multiple terminal equipment (User Equipment, UE), such as live broadcast service, public safety service, batch software update service, etc.
  • UE User Equipment
  • the multicast service is designed for services with high QoS requirements. It requires group management for the multicast service and can provide the same QoS level as the unicast service.
  • the core network needs to manage the joining and exiting of UEs. Multicast services are provided to UEs in RRC connected state, and gNB and CN need to maintain UE information corresponding to the multicast service group.
  • the UE does not receive the paging message correctly, it may not be able to receive subsequent multicast broadcast services normally, resulting in reduced multicast broadcast service transmission reliability.
  • This application provides a communication method and communication device, which can improve the reliability of multicast broadcast service transmission.
  • the first aspect provides a communication method, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, which is not limited in this application.
  • a component such as a chip or circuit
  • the following description takes execution by the first terminal device as an example.
  • the method may include: the first terminal device determines a first paging opportunity according to the identity of the first terminal device; when the first terminal device does not monitor a paging message at the first paging opportunity. , the first terminal device starts to monitor the physical downlink control channel PDCCH corresponding to the multicast broadcast control channel MCCH within the first period; receives the first downlink control information DCI on the PDCCH, and receives the MCCH according to the first DCI message, the MCCH message includes configuration information of the multicast service.
  • the first terminal device when the first terminal device cannot detect the paging message on the corresponding PO, because it is not sure whether the network side did not send it or whether it was missed or wrongly detected due to some abnormalities, then within the period corresponding to the PO Monitor the PDCCH, further read the MCCH message through the DCI received on the PDCCH, and obtain the configuration information of the multicast service. This can effectively avoid missing the multicast service activation message information because the UE has not read the paging message, and effectively improves multicast performance. Reliability of business transmission.
  • the first period is the MCCH modification period in which the first paging opportunity occurs; or the first period is the first paging opportunity.
  • the Nth MCCH modification period after the current MCCH modification period where N is a positive integer, and N is a positive integer.
  • the first terminal device can accurately start monitoring the PDCCH corresponding to the MCCH in a fixed period.
  • the first DCI includes first indication information
  • receiving the MCCH message according to the first DCI includes: when the first indication information indicates reading the MCCH message, the MCCH message is received according to the first information.
  • the first indication information includes a first bit, and the When the first bit value is the first value, the first indication information instructs the first terminal device to read the MCCH.
  • the first terminal device determines to skip M consecutive MCCH modification periods according to the second indication information, and the second indication information is carried in DCI or In the MCCH message, M is a positive integer.
  • the second aspect provides a communication method, which can be executed by a network device, or can also be executed by a component of the network device (such as a chip or a circuit), which is not limited in this application.
  • a component of the network device such as a chip or a circuit
  • the following description takes execution by the first terminal device as an example.
  • the method may include: the network device determines the first paging opportunity corresponding to the first terminal device; the network device starts sending the first downlink control information DCI in the first period corresponding to the first paging opportunity, and the first downlink control information DCI is A DCI is used for the first terminal device to schedule the multicast control channel MCCH message when the first terminal device does not monitor the paging message on the first paging opportunity; the first DCI of the network device is used to schedule the MCCH message, and the MCCH message Contains multicast service configuration information.
  • the first period is the MCCH modification period in which the first paging opportunity occurs; or the first period is the first paging opportunity.
  • the Nth MCCH modification period after the current MCCH modification period where N is a positive integer, and N is a positive integer.
  • the first DCI includes first indication information
  • the first indication information includes a first bit
  • the value of the first bit is the first value.
  • the first indication information indicates when the first terminal device reads the MCCH message.
  • the method further includes: sending second instruction information to the first terminal device, the second instruction information instructing the first terminal device to skip M consecutive MCCH modification period, the second indication information is carried in DCI or the MCCH message.
  • a communication method is provided, which can be executed by a network device, or can also be executed by a component (such as a chip or circuit) of the network device, which is not limited in this application.
  • a component such as a chip or circuit
  • the following description takes execution by a network device as an example.
  • the method may include: the network device determines the first paging opportunity PO corresponding to the first terminal device; the network device sends the first information to the first terminal device on the first paging opportunity PO, and the first paging opportunity PO corresponds to the network device.
  • a message indicates that the first terminal device does not receive MCCH messages corresponding to M consecutive MCCH modification periods of the multicast broadcast control channel, and the M consecutive MCCH modification periods are the M consecutive MCCH modifications after the MCCH modification period corresponding to the first PO.
  • Period the network device sends the MCCH message in the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO.
  • the method further includes: the network device determines a second PO corresponding to the second terminal device; and the network device sends a message to the second terminal device on the second PO.
  • Second information indicates that the second terminal device does not receive MCCH messages corresponding to N consecutive MCCH modification periods, and the N consecutive MCCH modification periods are N consecutive MCCH modifications after the MCCH modification period corresponding to the second PO. cycle; the second The N+1th MCCH modification period after the MCCH modification period corresponding to the PO is the same as the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO.
  • the N+1th MCCH period after the MCCH modification period corresponding to the second PO is the same as the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO, so that for different POs, but UEs that need to receive the same multicast service can start receiving MCCH messages in the same period to avoid power consumption caused by UEs with earlier POs from prematurely monitoring and receiving MCCH messages.
  • the method further includes: before sending the MCCH message, the network device sends third indication information, the third indication information indicates to the first terminal The device reads the MCCH message.
  • the third indication information includes a second bit, and when the value of the second bit is the first value, the third indication information instructs the UE to read Take MCCH.
  • the fourth aspect provides a communication method, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, which is not limited in this application.
  • a component such as a chip or circuit
  • the following description takes execution by the second terminal device as an example.
  • the method may include: the first terminal device receives first information on the first paging opportunity PO, the first information indicating that the first terminal device does not receive M consecutive multicast broadcast control channels MCCH modification periods corresponding to MCCH message; the first terminal device does not receive the MCCH message corresponding to the M MCCH modification periods according to the first information.
  • the first terminal device receives third indication information, and reads the MCCH message corresponding to the M+1th MCCH modification period according to the third indication information.
  • a communication device which is used to perform the method in any of the possible implementation manners of the first to fifth aspects.
  • the device may include units and/or modules for performing the method in any possible implementation of the first to fifth aspects, such as a processing unit and/or a communication unit.
  • the device is a terminal device.
  • the communication unit may be a transceiver, or an input/output interface;
  • the processing unit may be at least one processor.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the device is a chip, a chip system or a circuit for a terminal device.
  • the communication unit may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip, chip system or circuit, etc.
  • the processing unit may be at least one processor, processing circuit or logic circuit, etc.
  • a sixth aspect provides a communication device, which includes: at least one processor configured to execute a computer program or instructions stored in a memory to perform the method in any of the possible implementations of the first to fifth aspects.
  • the device further includes a memory for storing computer programs or instructions.
  • the device further includes a communication interface, through which the processor reads the computer program or instructions stored in the memory.
  • the device is a terminal device.
  • the device is a chip, a chip system or a circuit for a terminal device.
  • the present application provides a processor for executing the methods provided in the above first to fifth aspects.
  • a computer-readable storage medium stores a program code for device execution.
  • the program code includes a method for executing any of the possible implementations of the above-mentioned first to fifth aspects. method.
  • a computer program product containing instructions is provided.
  • the computer program product When the computer program product is run on a computer, it causes the computer to execute the method in any of the possible implementation modes of the first to fifth aspects.
  • a communication system including at least one of the aforementioned first terminal devices and network equipment.
  • Figure 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the MBS service transmission process
  • Figure 3 is a schematic diagram of the multicast service transmission process
  • Figure 4 is a schematic diagram of the specific transmission mechanism of MCCH
  • Figure 5 is a schematic diagram of the service deactivation process
  • Figure 6 is a schematic flow chart of a communication method proposed in this application.
  • Figure 7 is a schematic diagram of the monitoring timing of MCCH corresponding to PDCCH
  • Figure 8 is a schematic diagram of multi-UE paging opportunities
  • FIG. 9 is a schematic flow chart of another communication method proposed in this application.
  • Figure 10 is a schematic diagram of MCCH message sending timing in a multi-UE scenario
  • Figure 11 is a schematic diagram of a communication device 1100 provided by an embodiment of the present application.
  • Figure 12 is a schematic diagram of another communication device 1200 provided by an embodiment of the present application.
  • Figure 13 is a schematic diagram of a chip system 1300 provided by an embodiment of the present application.
  • FIG. 1 is a schematic architectural diagram of a communication system 1000 applied in an embodiment of the present application.
  • the communication system includes a wireless access network 100 and a core network 200.
  • the communication system 1000 may also include the Internet 300.
  • the radio access network 100 may include at least one radio access network device (110a and 110b in Figure 1), and may also include at least one terminal (120a-120j in Figure 1).
  • the terminal is connected to the wireless access network equipment through wireless means, and the wireless access network equipment is connected to the core network through wireless or wired means.
  • the core network equipment and the radio access network equipment can be independent and different physical devices, or the functions of the core network equipment and the logical functions of the radio access network equipment can be integrated on the same physical device, or they can be one physical device.
  • Figure 1 is only a schematic diagram.
  • the communication system may also include other network equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Figure 1 .
  • the core network equipment can also be called core network device and can include one or more of the following network elements: unified data management (UDM) network element, application function (AF) network element, policy Policy control function (PCF) network element, network exposure function (NEF) network element, access and mobility management function (AMF) network element, session management function (session management) function (SMF) network element, user plane function (UPF) network element, etc.
  • UDM unified data management
  • AF application function
  • PCF policy Policy control function
  • NEF network exposure function
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • Each of the above network elements can also be called a device, equipment or entity, and this application is not limited thereto.
  • a UDM network element can also be called a UDM device, UDM equipment or UDM entity.
  • abbreviations will be used below.
  • AMF network element is referred to as "AMF”.
  • Wireless access network equipment can be a base station, an evolved base station (evolved NodeB, eNodeB), a transmission reception point (TRP), or the next generation of the fifth generation (5th generation, 5G) mobile communication system.
  • Base station (next generation NodeB, gNB), the next generation base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.; it can also complete the base station part
  • a functional module or unit for example, can be a centralized unit (CU) or a distributed unit (DU).
  • the CU here completes the functions of the base station's radio resource control protocol and packet data convergence protocol (PDCP), and can also complete the functions of the service data adaptation protocol (SDAP); DU completes the functions of the base station
  • the functions of the wireless link control layer and medium access control (MAC) layer can also complete some or all of the physical layer functions.
  • the wireless access network equipment may be a macro base station (110a in Figure 1), a micro base station or an indoor station (110b in Figure 1), or a relay node or donor node.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the wireless access network equipment.
  • Wireless access network equipment may also be called network devices.
  • the following description takes a base station as an example of a radio access network device.
  • the terminal can also be called terminal equipment, terminal device, user equipment (UE), mobile station, mobile terminal, etc.
  • Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things ( internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • Terminals can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the terminal.
  • Base stations and terminals can be fixed-location or mobile. Base stations and terminals can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.
  • the helicopter or drone 120i in Figure 1 may be configured as a mobile base station.
  • the terminal 120i is Base station; but for base station 110a, 120i is a terminal, that is, communication between 110a and 120i is through a wireless air interface protocol.
  • communication between 110a and 120i can also be carried out through an interface protocol between base stations.
  • relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively called communication devices.
  • 110a and 110b in Figure 1 can be called communication devices with base station functions
  • 120a-120j in Figure 1 can be called communication devices with terminal functions.
  • Communication between base stations and terminals, between base stations and base stations, and between terminals can be carried out through licensed spectrum, or through unlicensed spectrum, or through licensed spectrum and unlicensed spectrum at the same time; it can communicate through 6,000 It can communicate using spectrum below gigahertz (GHz), it can also communicate through spectrum above 6GHz, and it can also communicate using spectrum below 6GHz and spectrum above 6GHz at the same time.
  • GHz gigahertz
  • the embodiments of the present application do not limit the spectrum resources used for wireless communication.
  • the functions of the base station may also be performed by modules (such as chips) in the base station, or may be performed by a control subsystem that includes the base station functions.
  • the control subsystem containing base station functions here can be the control center in the above application scenarios such as smart grid, industrial control, smart transportation, smart city, etc.
  • the functions of the terminal can also be controlled by the terminal It can be executed by a module (such as a chip or modem), or it can be executed by a device containing terminal functions.
  • Wireless communication between communication devices may include: wireless communication between network devices and terminals, wireless communication between network devices and network devices, and wireless communication between terminal devices.
  • wireless communication can also be referred to as “communication”
  • communication can also be described as "data transmission”, “information transmission” or “transmission”.
  • terminal equipment is also called “terminal device”, “terminal”, etc.
  • network equipment is also called “network device”, “network side”, etc.
  • core network equipment is also called “core network equipment”.
  • Multicast and broadcast service It is a service for multiple terminal devices, such as live broadcast service, public safety service, batch software update service, etc.
  • the MBS service comes from the data server.
  • the data server sends the MBS data to the core network device.
  • the core network device sends the MBS data to the base station.
  • the base station sends the MBS data to at least one UE that receives the MBS service.
  • MBS includes multicast services and broadcast services.
  • the MBS service When sent from the core network to the base station, the MBS service is transmitted through a common transmission channel MBS session. Each MBS session can contain at least one MBS quality of service (QoS) flow.
  • QoS quality of service
  • the data packet When sending from the base station to the UE, the data packet is transmitted through the MBS wireless bearer.
  • MBS wireless bearer There are two transmission modes for an MBS wireless bearer: the first one can use point to multi-point (PTM) transmission mode. , the second one can use point to point (PTP) transmission method.
  • PTM point to multi-point
  • PTP point to point
  • Multicast service is designed for services with high QoS requirements. Multicast service can provide the same QoS level as unicast service. Group management needs to be performed for multicast services. Specifically, as shown in (a) in Figure 3, for multicast services, the core network needs to manage the joining and exit of UEs. The transmission between the core network and the base station relies on the protocol data unit session (PDU session), and the MBS QoS flow (flow) is introduced.
  • the radio access network device radio access network, RAN
  • RAN radio access network
  • the access network device and the terminal device have a peer-to-peer protocol stack structure for mutual communication.
  • the user plane protocol stack structure can include the RRC layer, service data adaptation protocol (SDAP) layer, PDCP layer, and Radio Link Control (Radio Link Control, RLC) layer , MAC layer and physical (physical, PHY) layer, etc.
  • the physical layer is located at the lowest layer (layer one)
  • the MAC layer, RLC layer, PDCP layer and SDAP layer belong to the second layer (layer two)
  • the RRC layer belongs to the third layer (layer three).
  • data is transmitted in the direction shown by the arrow in the figure (for MBS service, the transmission direction is from the base station to the UE).
  • the data first reaches the SDAP layer of the base station and is mapped by the SDAP layer. Later, it is transmitted to the corresponding PDCP entity, processed by the PDCP layer of the base station, and then transmitted to the RLC layer and MAC layer. After corresponding processing, it is sent out from the physical layer and transmitted to the UE side through the air interface. Then each protocol layer on the UE side performs corresponding processing on the data packets in sequence in the opposite processing order as that of the base station.
  • Each radio bearer configuration will contain a PDCP entity, and each radio bearer configuration will be associated with at least one RLC entity, and each RLC entity corresponds to a logical channel.
  • MRB multicast radio bearer
  • MRB includes the following three types: PTP only MRB, PTM only MRB, and split MRB (PTP MRB+PTM MRB).
  • PTP only MRB is associated with a PTP RLC entity
  • PTM only MRB is associated with a PTM RLC entity
  • split MRB is associated with a PTM RLC entity and a PTP RLC entity.
  • PTM RLC has many Each UE is the same. Multiple UEs use the same group radio network temporary identifier (g-RNTI) for descrambling.
  • PTP RLC is independent for each UE. Each UE uses its own cell radio network temporary identifier. Identifier (cell radio network temporary identifier, C-RNTI) monitoring.
  • G-RNTI and g-RNTI in the embodiments of the present application can be replaced with each other, and C-RNTI and c-RNTI can be replaced with each other. This is not limited in the embodiments of the present application.
  • Multicast services can only be provided to UEs in radio resource control (RRC) connected state, and access network equipment and core network equipment need to maintain UE information corresponding to multicast broadcast service groups.
  • RRC radio resource control
  • the multicast service also supports the deactivation or activation of the MBS session triggered by the core network, and the UE does not perceive the service status.
  • the communicating parties in the multicast service can send data within a limited area, or send different contents in different areas.
  • Multicast broadcast control channel and multicast broadcast service channel Two logical channels are introduced in the broadcast technology of NR MBS, multicast broadcast control channel (MBS control channel, MCCH) and multicast broadcast service channel (MBS traffic channel, MTCH), where MCCH is used to transmit control information, including MTCH configuration information, such as g-RNTI and DRX parameters corresponding to MTCH. MCCH is sent periodically.
  • the MTCH logical channel is used to carry user data of broadcast services.
  • MTCH is scheduled through MCCH.
  • the configuration of MTCH is per (per) g-RNTI level, which can also be said to be per MBS service level.
  • the base station schedules service data to multiple UEs simultaneously through g-RNTI, and each g-RNTI can be associated with at least one broadcast service.
  • the above channels may correspond to different names.
  • the multicast broadcast service control channel may be a single cell multicast broadcast service control channel (single cell MCCH, SC-MCCH).
  • the multicast broadcast service control channel may be MC-MCCH.
  • channels with similar functions to the multicast broadcast service control channel may have other names, or in different communication environments, communication scenarios or communication technologies, channels with the same functions may also have different names.
  • Different names of channels with similar or identical functions in different systems do not limit the channel content and functions.
  • the multicast broadcast control channel in this application can be used to transmit control information, and the multicast broadcast service channel can be used to transmit user data.
  • MCCH is used to represent the multicast broadcast service control channel
  • MTCH is used to represent the multicast broadcast service channel
  • Multicast broadcast control channel modification notification As shown in Figure 4, MCCH is sent repeatedly in each modification period (Modification period, MP), including the repetition period (repetition period, RP). In an MP, the content of MCCH is the same.
  • MP Modification period
  • the network device sends a PDCCH containing a modification notification, and the modification notification is MCCH change notification.
  • the UE detects the field corresponding to the MCCH change notification on the PDCCH, such as 2 bits, it is considered that a modification notification has been detected, and the UE reacquires the MCCH.
  • the UE When the UE obtains the MCCH, it needs to detect the MCCH-RNTI scrambled PDCCH to obtain the MCCH scheduling information.
  • the first bit in the MCCH modification notification indicates that the reason for the MCCH modification is session start, and the second bit in the MCCH modification notification indicates that the reason for the MCCH modification is session modification, session stop, or neighbor cell list update.
  • RRC state There are three RRC states in NR: RRC idle state (RRC_IDLE), RRC inactive state (RRC_INACTIVE), and RRC connected state (RRC_CONNECTED). The following is a brief introduction to the three RRC states.
  • RAN has the context of the UE, and the UE and RAN have a signaling connection.
  • the UE can receive messages and system messages sent by the RAN to control the UE to perform data transmission, handover, and notify the UE of relevant scheduling information, and the RAN can receive channel quality information fed back by the UE.
  • RRC inactive state The connection between the RAN and the core network is maintained, and no resources are allocated to the air interface. It can quickly restore services and improve the experience of delay-sensitive applications. In addition, the power saving effect of users in inactive state can also be close to that of idle state, extending the battery life of mobile phones.
  • 3RRC_IDLE (RRC idle state): RAN has no context for the UE, and there is no signaling connection between the UE and the RAN. In this state, the UE can receive system messages and paging messages, and perform cell selection and reselection. When the UE needs to establish a connection with the network for a certain purpose (service request, location update, paging, etc.), the RRC connection establishment is triggered. After the RRC connection is established, it enters the RRC connection state.
  • a certain purpose service request, location update, paging, etc.
  • the RRC non-connected state in this application may be the RRC idle state and/or the RRC inactive state.
  • the non-connected state in this application can be replaced by the RRC idle state and/or the RRC inactive state.
  • Multicast session ID used to identify services.
  • a multicast session ID can be associated with a service.
  • the multicast session identifier may be a temporary multicast group identifier (TMGI).
  • the MBS session deactivation process applies to multicast.
  • the MBS session deactivation process is triggered by the multicast session management function (MB-SMF) network element.
  • M-SMF multicast session management function
  • MB user plane MBS Session The deactivation process is used to deactivate the MBS data resources of the 5G access network (NG-RAN) node.
  • NG-RAN 5G access network
  • 5GC 5G core network
  • the RAN releases the radio resources of the multicast session and stops transmitting multicast session data to the UE.
  • the base station can release the RRC connection to the UE or not, without notifying the UE.
  • the multicast session state transitions from active to inactive.
  • the deactivation state may be that the current service of the UE is in the deactivation state, or the session related to the current service is in the deactivation state.
  • the base station may instruct the UE to release the service. .
  • the MBS release process is triggered by the core network.
  • the core network (CN) N decides to release a multicast service or delete a UE from the multicast service, the above process can be executed. If the CN determines that there is a CM-IDLE UE, the CN will initiate paging to bring the UE into the connected state to perform the subsequent release process.
  • the message sent may be a group paging message (when the base station supports multicast), or a unicast paging message (when the base station does not support multicast, the multicast service is provided through unicast).
  • the state of the multicast broadcast service can also be understood as the state of the multicast broadcast session, and releasing the multicast broadcast session service can also be understood as releasing the multicast broadcast session.
  • the service can also be understood as Multicast broadcast service.
  • “service” and “session” can be replaced with each other.
  • the MBS session activation process only applies to multicast.
  • the MBS session activation process is triggered by MB-SMF.
  • MB-SMF receives a notification from MB-UPF about MBS downlink data, or when MB-SMF directly receives a request forwarded by AF or through NEF, the MBS Session activation process is triggered.
  • the MBS Session activation process is used to activate the MBS data resources of the NG-RAN node, such as establishing wireless resources for multicast sessions and transmitting multicast session data to the UE.
  • UEs in the connection management-IDLE (CM)-IDLE) state and CM-CONNECTED+RRC Inactive state that join the multicast session will be paged (paging), which can be requested by the AF of MB-UPF or
  • the data notification triggers the activation process of these UEs, and the multicast session state transitions from the deactivation state to the activation state.
  • the message used by the AMF to page the UE in the CM-IDLE state can be a group paging message (when the base station supports multicast), or a unicast paging message (when the base station does not support multicast, through unicast Provide multicast services).
  • the AMF sends a multicast session activation request message to the RAN, the RAN paging process can be triggered.
  • the multicast broadcast control channel or MCCH mentioned in this application is used for multicast services. Specifically, it can be used to carry configuration information of multicast services.
  • the configuration information of multicast services can be sent through MCCH messages.
  • the multicast broadcast control channel may be shared with the multicast broadcast control channel used by the broadcast service, or may be a channel specifically used to carry configuration information of the multicast service.
  • This application does not limit the definition method or name of the multicast broadcast control channel or MCCH. It can be replaced by other expressions or names, and it can be replaced by other channels used to contain multicast service configuration information.
  • monitoring the MCCH or reading the MCCH in this application refers to monitoring the PDCCH corresponding to the MCCH, or using the RNTI corresponding to the MCCH (such as MCCH-RNTI) to monitor the PDCCH, or using the RNTI corresponding to the MCCH (such as MCCH-RNTI) to solve the problem. Scramble the DCI and/or obtain the MCCH message or the scheduling information of the PDSCH corresponding to the MCCH.
  • the multicast broadcast service channel or multicast broadcast transmission channel or MTCH is used for multicast services. Specifically, it can be used to carry multicast service data.
  • the multicast service data can be carried through the MTCH.
  • the multicast broadcast service/transmission channel may be shared with the multicast broadcast service/transmission channel used by the broadcast service, or may be a channel specifically used to carry data of the multicast service.
  • This application does not limit the definition method or name of the multicast broadcast service/transmission channel or MTCH, which can be replaced by other expressions or names, and can be replaced by other channels used to contain multicast service data.
  • monitoring MTCH or reading MTCH in this application refers to monitoring the PDCCH corresponding to the MTCH, or using the RNTI corresponding to the MTCH (such as G-RNTI) to monitor the PDCCH, or using the RNTI corresponding to the MTCH (such as G-RNTI) to resolve the problem. Scramble the DCI and/or obtain the scheduling information of the PDSCH corresponding to the MTCH.
  • the UE In the context of receiving multicast services in a non-connected state, if the UE is released to a non-connected state to receive multicast services, the UE must always use G-RNTI to listen to the PDCCH to read service data.
  • the network equipment if the core network triggers the service deactivation process to the base station, the network equipment will stop sending data for a long period of time.
  • the network provides multicast services in non-connection mode, if the service is deactivated, the UE needs to be notified of the status of the corresponding service.
  • the base station When the multicast or broadcast service is deactivated, if the base station is providing non-connection mode transmission service, instruct the relevant service to be deactivated. In one possible way, the base station indicates service deactivation through MCCH.
  • the UE may have the following choices:
  • Option1 The UE stops monitoring MTCH, continues to monitor the PDCCH corresponding to MCCH, and obtains when the service is activated through MCCH;
  • Option2 The UE stops monitoring MTCH, continues to monitor the PDCCH corresponding to MCCH, and continues to monitor paging;
  • Option3 The UE stops monitoring MTCH and MCCH and continues to monitor paging.
  • the UE when the service is activated, the UE receives paging and triggers monitoring of MCCH and MTCH to start receiving data.
  • the UE may fail to receive paging or miss detection. Due to overhead issues, for example, paging messages may not always have resources to send TMGI. The network side will most likely not send paging repeatedly for reliability. Once it is missed/missed/ The impact on inactive UEs that receive multicast after decoding the activation indication is more serious than that of ordinary UEs that miss/miss detection/erroneously decode paging. Ordinary UEs do not receive paging and do not enter the connected state, which can be sensed by the base station and the core network.
  • Paging can be initiated again, but once the UE in the non-connected state receives multicast misses, the network will not detect that the UE has not received the service activation notification. Once the deactivation and reactivation operations are not performed for a long period of time after the service is deactivated, the UE will not receive the service during this period, which will cause the service to be missed. Therefore, how to ensure that the UE can still normally start receiving non-connected services after missing paging is an issue that needs to be solved urgently.
  • This application provides a communication method.
  • the UE When the UE does not monitor the paging message on its corresponding PO, the UE monitors the PDCCH corresponding to the MCCH to prevent the UE from missing business-related messages, thereby improving the reliability of business transmission. See Figure 6.
  • the first terminal device may also be referred to as UE1 for short.
  • the first terminal device determines the first paging opportunity.
  • the first terminal device determines the first PO based on its identification.
  • the paging time also includes two-level settings: paging frame (PF) and paging occasion (Paging Occasion, PO).
  • PF, and Po are calculated based on the terminal identification.
  • the terminal identification can be obtained from 5G-S-TMSI mod 1024.
  • the first terminal device starts monitoring the PDCCH corresponding to the MCCH within the first period.
  • the first terminal device uses a first identifier to monitor the PDCCH, and the first identifier is the RNTI corresponding to the MCCH, for example, MCCH-RNTI.
  • the first terminal device when the first terminal device does not monitor the paging message on the first PO, the first terminal device starts monitoring the PDCCH within the first period.
  • Starting to monitor the PDCCH within the first period can be understood as monitoring the PDCCH from the start time of the first period.
  • the rule that UE1 monitors the PDCCH corresponding to the MCCH in the first period of time without listening to the paging message in the first PO can be fixed in the protocol, that is, UE1 always executes according to this rule; it can also be configured by the network for UE1, such as Indicated when the service is deactivated.
  • the MCCH message contains relevant indication information to indicate the rule; or it is configured when the RRC is released to the non-connected state to receive the corresponding service, or it is broadcast in the system message whether the UE needs to perform this behavior. .
  • the indication information can be 1 bit or set to True for a field. When this indication information exists This behavior is deemed necessary.
  • the first period is the MCCH modification period where the first paging opportunity is located; or the first period is the Nth MCCH modification period after the MCCH modification period where the first paging opportunity is located.
  • N is a positive integer.
  • the first period is the Nth MCCH modification period after the MCCH modification period in which the first paging opportunity occurs.
  • the first period is the first MCCH modification period after the MCCH modification period in which the first paging opportunity occurs.
  • several MCCH modification cycles are possible to be performed.
  • the first period is the MCCH modification period in which the first paging opportunity occurs
  • the MCCH modification period where the first paging opportunity occurs is MCCH period 1
  • the first time period may be MCCH period 1
  • the first time period may be the MCCH modification period where the first paging opportunity occurs.
  • the MCCH modification period after the period for example, MCCH modification period 2.
  • the N can be configured by the base station, for example, configured through RRC high-level signaling, or configured through DCI information, or MAC CE Signaling configuration. Or the N is a predefined parameter.
  • UE1 when UE1 cannot detect the paging message on the corresponding PO, because it is not sure whether the network side did not send it or whether it was missed or wrongly detected due to some anomalies, it monitors the PDCCH in the period corresponding to the PO. Further reading the MCCH message through the DCI received on the PDCCH to obtain the configuration information of the multicast service can effectively avoid missing the multicast service activation information because UE1 has not read the paging message, effectively improving the reliability of multicast service transmission. sex.
  • the first terminal device when the first terminal device does not monitor the paging message on the first PO, the first terminal device responds to the MCCH modification period corresponding to the first PO or the Nth MCCH after the MCCH modification period corresponding to the first PO. Start monitoring PDCCH during the modification period.
  • the MCCH modification period where the first PO is located is MCCH period 1
  • the first MCCH modification period after the MCCH modification period where the first PO is located is MCCH period 2
  • the MCCH modification period after the first PO is The second MCCH modification period is MCCH period 3, and so on.
  • the first terminal device monitors the paging message on the first PO, it can be specifically divided into the following situations:
  • the first terminal device receives paging messages from other UEs on the first PO, or the service identifier included in the paging message is other multicast service identifiers that the first terminal device is not interested in, then the first terminal device has no Other special actions.
  • the paging message received by the first terminal device on the first PO contains the identification information of the first terminal device, and the first terminal device enters the connected state to receive the service.
  • the paging message received by the first terminal device on the first PO contains the service activation information of the multicast service that it is interested in.
  • the paging message contains TMGI 1 and a service activation indication, where TMGI 1 is UE1 If the identification of the multicast service expected to be received is obtained, the first terminal device reads the MCCH message in the next MCCH cycle according to the paging message.
  • the network device starts sending the first DCI in the first period corresponding to the first paging opportunity.
  • the first DCI is used to schedule the MCCH message, for example, when the first terminal device does not monitor the paging opportunity on the first paging opportunity. Scheduling MCCH messages.
  • the network device determines the first paging opportunity corresponding to the first terminal device. Specifically, the network device determines the first paging opportunity corresponding to the first terminal device according to its identifier.
  • step 303 and step 302 are not limited.
  • the first terminal device receives the first DCI on the PDCCH, and receives an MCCH message according to the first DCI.
  • the MCCH message includes the configuration information of the multicast service.
  • the first DCI contains first indication information
  • receiving the MCCH message according to the first DCI specifically includes: when the first indication information instructs the first terminal device to read the MCCH message, the first terminal device reads the MCCH message according to the first DCI. Receive MCCH message.
  • the first DCI schedules the PDSCH where the MCCH message is located. Therefore, after receiving the first DCI, UE1 receives the MCCH message at the time-frequency position indicated by the DCI.
  • the MCCH message includes configuration information of the multicast service.
  • UE1 determines whether to receive the MCCH message scheduled by the first DCI according to the value status of the first indication information in the first DCI or according to whether the first DCI contains the first indication information.
  • the MCCH message is carried in the PDSCH, and the first DCI schedules the PDSCH.
  • the first indication information includes a first bit.
  • the first indication information indicates UE reads MCCH.
  • the first value is 1, or the first value is 0.
  • UE1 receives the MCCH message on the MCCH channel according to the bit with a value of 1.
  • the specific time-frequency resource location where the MCCH message is located is indicated by other information in the DCI.
  • the first DCI also includes time-frequency resource indication information, indicating the time-frequency location of the MCCH message in the PDSCH.
  • the first indication information may also complete the instruction by implicit indicating. For example, when the first DCI contains the first indication information, it indicates that the MCCH message is read; when the first DCI does not contain the first indication information, it indicates that the MCCH message is not read.
  • the first indication information may be expressed as "true”.
  • the first indication information includes two bits.
  • the first indication information includes a 2-bit field "MCCH change notification”, and the value of one of the two bits is used to indicate whether the UE reads the MCCH message. For example, if the first bit or the second bit of the two bits takes a first value, it indicates that the MCCH message is read, and if it takes a second value, it indicates that there is no need to read the MCCH message. Among them, the first value is 1 and the second value is 0, or vice versa.
  • the MCCH message includes the configuration message of the multicast service, for example, the configuration information of the MTCH, such as the G-RNTI and DRX parameters corresponding to the MTCH.
  • the MTCH logical channel carries user data of the broadcast service.
  • MTCH is scheduled through MCCH.
  • the configuration of MTCH can be at G-RNTI level or MBS service level. Among them, gNB schedules service data to multiple UEs at the same time through group RNTI (G-RNTI, Group RNTI). Each G-RNTI can be associated with at least one broadcast service or multicast service.
  • UE1 can receive the user data of the multicast service on the corresponding MTCH according to the MCCH message.
  • this method can also include:
  • Step S305 The first terminal device receives second instruction information from the network device.
  • the network device sends second instruction information to the first terminal device.
  • the first terminal device determines to skip M consecutive MCCH modification periods according to the second indication information, the second indication information is carried in the DCI or the MCCH message, and M is a positive integer.
  • Skipping the M consecutive MCCH modification periods here can be understood as UE1 not receiving MCCH messages within the M consecutive MCCH modification periods.
  • UE1 Since UE1 starts monitoring the PDCCH corresponding to the MCCH by default, it may continue to listen unless it is instructed or is no longer interested in the service. Therefore, optionally, a second instruction message is sent to UE1, instructing UE1 not to receive M consecutive MCCH modification periods. MCCH message within.
  • the second indication information may be carried in the DCI4_0 or MCCH message.
  • the second indication information may indicate that MCCH messages of the same service can be read again after several MCCH modification cycles, which is used to skip consecutive MCCH messages.
  • UE1 when multiple multicast services have this indication, as long as there is a service indicating that the PDCCH corresponding to the MCCH needs to be monitored on a certain MCCH, UE1 needs to monitor it, regardless of whether other service instructions are skipped.
  • UE1 has two multicast services.
  • the second indication information contained in DCI 1 of multicast service 1 is 00001
  • the second indication information contained in DCI2 of multicast service 2 is 00100.
  • the bit string in DCI 1 The meaning of 00001 is to skip 4 consecutive MCCH modification periods and start reading from the 5th MCCH modification period.
  • the bit string 00100 in DCI2 means to skip 2 consecutive MCCH modification periods and start reading from the 3rd MCCH modification period.
  • UE1 When the cycle starts reading, UE1 skips the next two MCCH modification cycles according to the instructions of the two DCIs, and receives MCCH messages from the third modification cycle to the fifth modification cycle.
  • the network device can also directly instruct two to be skipped without instructing according to specific services.
  • the terminal device can skip part of the repeated MCCH messages, thereby reducing the power consumption overhead caused by the terminal device always receiving the same signaling.
  • the corresponding PO may be different.
  • the MTCH or MTCH+MCCH can only start sending after the PO of all UEs receiving the service data.
  • Waiting for the service to start may cause premature monitoring of the PDCCH corresponding to the MCCH, because the network implementation should ensure that activation instructions are sent to all UEs before starting to send services, so the network may start monitoring the G-RNTI prematurely.
  • the cycle may be very long, greater than 10.24s. In this scenario, the non-connected UE may need to listen to G-RNTI for a long time but has no data, which will cause a waste of energy.
  • This application provides a communication method 500.
  • the network device When there are multiple UEs, and the POs of different UEs are different, the network device indicates the reception time of an MCCH message for the multiple UEs, reducing unnecessary monitoring overhead of the UE.
  • the method includes:
  • the network device determines the first paging opportunity corresponding to the first terminal device.
  • the network device determines the first paging opportunity of the first terminal device according to the identity of the first terminal device.
  • the network device determines the second paging opportunity corresponding to the second terminal device.
  • the second PO corresponding to the second terminal device is also determined according to the identification or ID of the second terminal device.
  • the first terminal device is abbreviated as UE1
  • the first paging opportunity is abbreviated as first PO
  • the second terminal device is abbreviated as UE2
  • the second paging opportunity is abbreviated as second PO.
  • Both UE1 and UE2 are terminal devices in the cell where the network device is located, or the RAN areas of UE1 and the second UE both include the cell where the network device is located. Both UE1 and UE2 are interested in multicast service 1.
  • UE1 may be one or more terminal devices, and the PO determined by them is the same, and the same applies to UE2.
  • the network device sends the first information to the first terminal device on the first PO, and the first information indicates that the first terminal device does not receive MCCH messages corresponding to M consecutive MCCH modification periods. It can also be understood that the corresponding MCCH message is received starting from the M+1th MCCH modification period.
  • the first terminal device receives the first information on the first PO, and the first terminal device does not receive MCCH messages corresponding to M MCCH modification periods according to the first information.
  • the M consecutive MCCH modification periods are the M consecutive MCCH modification periods after the MCCH modification period corresponding to the first PO.
  • the MCCH modification period corresponding to the first PO can be understood as the MCCH modification period of the first PO in the time domain.
  • the currently described MCCH modification period may be the 0th modification period or the 1st modification period.
  • the first information may directly instruct the first terminal device to receive the MCCH message at the first moment. That is, the timing of sending the MCCH message is indicated by indicating a specific time, such as a specific frame, subframe, and/or time slot.
  • the second information can be sent to UE2 at this time, and the second information also indicates the first time, and then UE1 and UE2 can receive the MCCH message at the first time at the same time.
  • the first information is carried in the paging message, and the paging message also includes the TMGI corresponding to the multicast service.
  • the activation of the multicast service is indicated through the information carried in the paging message.
  • the first terminal device determines based on its own ID in the paging message received on the first PO and the TMGI of the multicast service 1 of interest that the paging message is used to indicate the reception of its own multicast service. According to the first information in the paging message, it is determined to skip the MCCH message of M MCCH modification periods and receive the MCCH message of the M+1th MCCH modification period; or according to the first information, the MCCH message is directly received at the first moment.
  • the indication information can be at the multicast service level, that is, one service corresponds to one indication.
  • 502 can also include:
  • S502b Send the second information to UE2 on the second PO.
  • the second information indicates that UE2 does not receive MCCH messages corresponding to N consecutive MCCH modification periods.
  • the N consecutive MCCH modification periods are the N consecutive MCCH modification periods corresponding to the second PO. indivual MCCH modification cycle;
  • the N+1th MCCH modification period after the MCCH modification period corresponding to the second PO is the same as the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO.
  • the N+1th MCCH period after the MCCH modification period corresponding to the second PO is the same as the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO, so that different POs need to receive the same multicast Service UEs can start receiving MCCH messages in the same period to avoid power consumption caused by early PO UEs monitoring and receiving MCCH messages prematurely.
  • the network device sends the MCCH message in the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO.
  • UE1 receives the MCCH message in the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO.
  • the network device when the N+1th MCCH modification period after the MCCH modification period corresponding to the second PO is the same as the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO, the network device The MCCH message is sent in the M+1th MCCH modification period after the MCCH modification period, that is, the MCCH message is sent in the N+1th MCCH modification period after the MCCH modification period corresponding to the second PO.
  • UE2 receives the MCCH message in the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO. That is, UE1 and UE2 read the MCCH message in the same MCCH modification period.
  • the network device sends third indication information, and the third indication information instructs UE1 to read the MCCH message.
  • the third indication information is also sent to UE2, and the third indication information also instructs UE2 to read the MCCH message.
  • the third indication information is carried in DCI, such as DCI_4, or in an MCCH message.
  • the third indication information includes a second bit.
  • the third indication information instructs the UE to read the MCCH.
  • the first value is 1, or the first value is 0.
  • UE1 receives the MCCH message on the MCCH channel according to the bit with a value of 1.
  • the specific time-frequency resource location where the MCCH message is located is indicated by other information in the DCI.
  • the first DCI also includes time-frequency resource indication information, indicating the time-frequency location of the MCCH message in the PDSCH.
  • the third indication information may also complete the instruction by implicit indicating. For example, when the first DCI contains the third indication information, it indicates that the MCCH message is read; when the first DCI does not contain the third indication information, it indicates that the MCCH message is not read.
  • the third indication information may be expressed as "true”.
  • the third indication information includes two bits
  • the third indication information includes a 2-bit field "MCCH change notification”
  • the value of one of the two bits is used to indicate whether the UE reads the MCCH message. For example, if the first bit or the second bit of the two bits takes a first value, it indicates that the MCCH message is read, and if it takes a second value, it indicates that there is no need to read the MCCH message. Among them, the first value is 1 and the second value is 0, or vice versa.
  • MCCH change notification includes two bits. The first bit indicates the start or activation of multicast, and the second bit indicates whether the MCCH message has been modified.
  • the MCCH modification notification which is the third indication information: For the network, it is necessary to add the M+1th Among the 2 bits of the modification period, one bit indicating whether the UE reads the MCCH message is set to 1. There is no limit to the other bit. Optionally, the 2 bits of the modification period corresponding to the first duration need to be set to 1. The bit indicating whether the UE reads the MCCH message is also set to 1, and there is no limit on the other bit.
  • the UE does not need to monitor the MCCH modification notification after receiving the paging indication activation, that is, it does not need to receive the third indication information, and the network side does not need to set 2 bits.
  • the modification period corresponding to the first duration can be changed. 2 bits The value of one bit indicating whether the UE reads the MCCH message is set to 1, and there is no limit to the value of the other bit.
  • the UE determines whether to monitor the MCCH according to the paging instruction.
  • the MCCH message includes configuration information of the multicast service.
  • the MCCH message includes the configuration message of the multicast service, for example, the configuration information of the MTCH, such as the G-RNTI and DRX parameters corresponding to the MTCH.
  • the MTCH logical channel carries user data of the broadcast service.
  • MTCH is scheduled through MCCH.
  • the configuration of MTCH is per G-RNTI level, which can also be said to be per MBS service level.
  • gNB schedules service data to multiple UEs at the same time through group RNTI (G-RNTI, Group RNTI).
  • Each G-RNTI can be associated with at least one broadcast service or multicast service.
  • UE1 can receive the user data of the multicast service on the corresponding MTCH according to the MCCH message.
  • the group paging sent to the PO where UE1 is located also indicates that MCCH monitoring will start in the next two MCCH modification periods of the current MCCH modification period, and the group paging sent to the PO where UE2 is located is In addition to the TMGI, the group paging also indicates that MCCH monitoring will start in the next MCCH modification period of the current MCCH modification period. Then UE1 and UE2 can start monitoring the PDCCH corresponding to the MCCH in the common MCCH modification period 3, and then receive the MCCH message, and then receive the service information on the MTCH. Avoid unnecessary power consumption overhead caused by UE1 starting to listen too early.
  • the PO time corresponding to the UE is different, and the time when each UE receives the group paging message and activation indication is inconsistent. This results in the time when the UE monitors the PDCCH and receives the MCCH is inconsistent. Therefore, the MCCHs that different UEs start monitoring before and after may be far away. Generally speaking, to actually send data, all UEs need to be notified of service activation before starting to send data. Therefore, the power consumption caused by prematurely monitoring the MCCH can be avoided by instructing the UE to receive the MCCH message.
  • FIG 11 is a schematic diagram of a communication device 1100 provided by an embodiment of the present application.
  • the device 1100 includes a transceiver unit 1110, which can be used to implement corresponding communication functions.
  • the transceiver unit 1110 may also be called a communication interface or communication unit.
  • the device 1100 may also include a processing unit 1120, which may be used for data processing.
  • a processing unit 1120 which may be used for data processing.
  • the device 1100 also includes a storage unit, which can be used to store instructions and/or data, and the processing unit 1120 can read the instructions and/or data in the storage unit, so that the device implements each of the foregoing method embodiments. Actions performed by terminal equipment or network equipment.
  • the device 1100 may be the first terminal device in the aforementioned embodiment, or may be a component (such as a chip) of the first terminal device.
  • the device 1100 can implement steps or processes corresponding to those performed by the first terminal device in the above method embodiment, wherein the transceiver unit 1110 can be used to perform operations related to the transceiver of the first terminal device in the above method embodiment, and the processing unit 1120 may be used to perform operations related to processing of the first terminal device in the above method embodiment.
  • the device 1100 is used to implement the functions of the first terminal device in the method embodiment shown in FIG. 6 .
  • the processing unit 1120 is configured to determine the first paging opportunity according to the identity of the first terminal device; the processing unit 1120 is also configured to: when no paging message is monitored on the first paging opportunity, Start monitoring the PDCCH corresponding to the MCCH within the first period; the transceiver unit 1110 is configured to receive the first DCI on the PDCCH, and receive the MCCH message according to the first DCI, where the MCCH message includes the configuration information of the multicast service.
  • the first period is the MCCH modification period in which the first paging opportunity occurs; or the first period is the Nth MCCH modification period after the MCCH modification period in which the first paging opportunity occurs, wherein N is a positive integer, and N is Positive integer.
  • the first DCI contains first indication information
  • receiving the MCCH message according to the first DCI includes: when the first indication information indicates reading the MCCH message, receiving the MCCH message according to the first information.
  • the processing unit 1120 is configured to determine to skip M consecutive MCCH modification periods according to the second indication information.
  • the second indication information is carried in the DCI or MCCH message, and M is a positive integer.
  • the device 1100 is used to implement the functions of the first terminal device in the method embodiment shown in FIG. 9 .
  • the transceiver unit 1110 is configured to receive first information on the first PO, the first information indicating that the first terminal device does not receive MCCH messages corresponding to M consecutive MCCH modification periods; the processing unit 1120 is configured to MCCH messages corresponding to the M MCCH modification periods are not received according to the first information.
  • the transceiver unit 1110 is also configured to receive the third indication information, and the processing unit 1120 is configured to read the MCCH message corresponding to the M+1th MCCH modification period according to the third indication information.
  • the device 1100 may be the network device in the previous embodiment, or may be a component of the network device (such as a chip).
  • the device 1100 can implement steps or processes corresponding to those performed by the network device in the above method embodiment, wherein the transceiver unit 1110 can be used to perform operations related to the transceiver of the network device in the above method embodiment, and the processing unit 1120 can be used to perform Operations related to processing of the network device in the above method embodiment.
  • the device 1100 is used to implement the functions of the network device in the method embodiment shown in Figure 6 .
  • the processing unit 1120 is used to determine the first paging opportunity corresponding to the first terminal device; the transceiver unit 1110 is used to start sending the first DCI in the first period corresponding to the first paging opportunity.
  • a DCI is used to schedule MCCH messages when the UE does not monitor the paging message on the first paging opportunity; the first DCI is used to schedule MCCH messages, and the MCCH messages include configuration information of the multicast service.
  • the first period is the MCCH modification period in which the first paging opportunity occurs; or the first period is the Nth MCCH modification period after the MCCH modification period in which the first paging opportunity occurs, wherein N is a positive integer, and N is a positive integer.
  • the first DCI contains first indication information
  • receiving the MCCH message according to the first DCI includes: when the first indication information indicates reading the MCCH message, receiving the MCCH message according to the first information.
  • the transceiver unit 1110 is configured to send second indication information to the first terminal device.
  • the second indication information instructs the first terminal device to skip M consecutive MCCH modification periods.
  • the second indication information is carried in a DCI or MCCH message. middle.
  • the device 1100 is used to implement the functions of the network device in the method embodiment shown in FIG. 9 .
  • the processing unit 1120 is used to determine the first PO corresponding to the first terminal device; the transceiver unit 1110 is used to send the first information to the first terminal device on the first PO, and the first information indicates that the first terminal device does not receive MCCH messages corresponding to M consecutive MCCH modification periods, and the M consecutive MCCH modification periods are M consecutive MCCH modification periods after the MCCH modification period corresponding to the first PO; the transceiver unit 1110 is also used to send MCCH messages after the MCCH modification period corresponding to the first PO.
  • the MCCH message is sent within the M+1th MCCH modification period.
  • the processing unit 1120 is also configured to determine the second PO corresponding to the second terminal device; the transceiver unit 1110 is also configured to send second information to the second terminal device on the second PO, where the second information indicates the second PO.
  • the terminal device does not receive MCCH messages corresponding to N consecutive MCCH modification periods.
  • the N consecutive MCCH modification periods are the N consecutive MCCH modification periods after the second PO corresponding to the MCCH modification period; the second PO corresponds to the N+th MCCH modification period after the second PO.
  • One MCCH modification period is the same as the M+1th MCCH modification period after the MCCH modification period corresponding to the first PO.
  • the transceiving unit 1110 is further configured to send third indication information before sending the MCCH message, and the third indication information instructs the first terminal device to read the MCCH message.
  • the device 1100 here is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor, or a group of processors) used to execute one or more software or firmware programs. processor, etc.) and memory, merged logic circuitry, and/or other suitable components to support the described functionality.
  • ASIC application specific integrated circuit
  • processor such as a shared processor, a proprietary processor, or a group of processors
  • memory merged logic circuitry, and/or other suitable components to support the described functionality.
  • the device 1100 can be specifically the first terminal device in the above embodiments, and can be used to execute various processes corresponding to the first terminal device in the above method embodiments and/or or steps, or the device 1100 can be specifically the second terminal device in the above embodiments, and can be used to perform various processes and/or steps corresponding to the second terminal device in the above method embodiments. To avoid duplication, here No longer.
  • the device 1100 of each of the above solutions has the function of realizing the corresponding steps performed by the first terminal device in the above method, or the device 1100 of the above various solutions has the function of realizing the corresponding steps of the second terminal device of the above method.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiving unit. (machine replacement), other units, such as processing units, etc., can be replaced by processors to respectively perform the sending and receiving operations and related processing operations in each method embodiment.
  • transceiver unit 1110 may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.
  • the device in Figure 11 may be the network element or device in the aforementioned embodiment, or it may be a chip or chip system, such as a system on chip (SoC).
  • the transceiver unit may be an input-output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. No limitation is made here.
  • Figure 12 is a schematic diagram of another communication device 1200 provided by an embodiment of the present application.
  • the apparatus 1200 includes a processor 1210 coupled with a memory 1220 for storing computer programs or instructions and/or data, and the processor 1210 is used for executing computer programs or instructions stored in the memory 1220, or reading the memory 1220 The stored data is used to execute the methods in the above method embodiments.
  • processors 1210 there are one or more processors 1210 .
  • the memory 1220 is integrated with the processor 1210, or is provided separately.
  • the device 1200 further includes an interface circuit 1230.
  • the interface circuit 1230 is used for receiving and/or transmitting signals.
  • the processor 1210 and the interface circuit 1230 are coupled to each other.
  • the processor 1210 is used to control the interface circuit 1230 to receive and/or send signals.
  • the interface circuit 1230 may be a transceiver or an input-output interface.
  • the processor 1210 is used to implement the functions of the above-mentioned processing unit 1120, and the interface circuit 1230 is used to implement the functions of the above-mentioned transceiver unit 1110.
  • the device 1200 is used to implement the operations performed by the first terminal device in each of the above method embodiments.
  • the processor 1210 is used to execute computer programs or instructions stored in the memory 1220 to implement related operations of the first terminal device in each of the above method embodiments. For example, the method executed by the first terminal device in the embodiment shown in FIG. 6 or FIG. 9 .
  • the device 1200 is used to implement the operations performed by the second terminal device in each of the above method embodiments.
  • the processor 1210 is used to execute computer programs or instructions stored in the memory 1220 to implement related operations of the second terminal device in each of the above method embodiments. For example, the method executed by the second terminal device in the embodiment shown in FIG. 6 or FIG. 9 .
  • the terminal chip implements the functions of the terminal in the above method embodiment.
  • the terminal chip receives information from other modules in the terminal (such as radio frequency modules or antennas), and the information is sent to the terminal by the base station; or, the terminal chip sends information to other modules in the terminal (such as radio frequency modules or antennas), and the terminal chip sends information to other modules in the terminal (such as radio frequency modules or antennas).
  • the information is sent by the terminal to the base station.
  • processors mentioned in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), or application-specific integrated circuit (ASIC).
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache.
  • RAM includes the following forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) and direct Memory bus random access memory (direct rambus RAM, DR RAM).
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.
  • FIG. 13 is a schematic diagram of a chip system 1300 provided by an embodiment of the present application.
  • the chip system 1300 (or can also be called a processing system) includes a logic circuit 1310 and an input/output interface 1320.
  • the logic circuit 1310 may be a processing circuit in the chip system 1300 .
  • the logic circuit 1310 can be coupled to the storage unit and call instructions in the storage unit, so that the chip system 1300 can implement the methods and functions of various embodiments of the present application.
  • the input/output interface 1320 can be an input/output circuit in the chip system 1300, which outputs information processed by the chip system 1300, or inputs data or signaling information to be processed into the chip system 1300 for processing.
  • the logic circuit 1310 can send sideline feedback information to the second terminal device through the input/output interface 1320.
  • the side row feedback information may be generated by the logic circuit 1310; or the input/output interface 1320 may input the side row data from the second terminal device to the logic circuit 1310 for processing.
  • the logic circuit 1310 can send side row data to the first terminal device through the input/output interface 1320.
  • the side row data It may be generated by the logic circuit 1310; or the input/output interface 1320 may input the side row feedback information from the first terminal device to the logic circuit 1310 for processing.
  • the chip system 1300 is used to implement the operations performed by the first terminal device in each of the above method embodiments.
  • the logic circuit 1310 is used to implement the processing-related operations performed by the first terminal device in the above method embodiment, such as the processing-related operations performed by the first terminal device in the embodiment shown in Figure 6 or Figure 9;
  • Input/output interface 1320 Used to implement the sending and/or receiving related operations performed by the first terminal device in the above method embodiment, such as the sending and/or receiving related operations performed by the first terminal device in the embodiment shown in Figure 6 or Figure 9 operation.
  • the chip system 1300 is used to implement the operations performed by the second terminal device in each of the above method embodiments.
  • the logic circuit 1310 is used to implement processing-related operations performed by the second terminal device in the above method embodiment, such as processing-related operations performed by the second terminal device in the embodiment shown in Figure 6 or Figure 9;
  • the input/output interface 1320 is used to implement the sending and/or receiving related operations performed by the second terminal device in the above method embodiment, such as the sending performed by the second terminal device in the embodiment shown in Figure 6 or Figure 9 and/or receive related operations.
  • Embodiments of the present application also provide a computer-readable storage medium on which computer instructions for implementing the methods executed by the first terminal device or the second terminal device in each of the above method embodiments are stored.
  • the computer when the computer program is executed by a computer, the computer can implement the method executed by the first terminal device or the second terminal device in each embodiment of the above method.
  • Embodiments of the present application also provide a computer program product that includes instructions that, when executed by a computer, implement the methods executed by the first terminal device or the second terminal device in each of the above method embodiments.
  • An embodiment of the present application also provides a communication system, which includes the first terminal device and the second terminal device in the above embodiments.
  • the system includes a first terminal device and a second terminal device in the embodiment shown in FIG. 6 or FIG. 9 .
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer may be a personal computer, a server, or a network device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated.
  • the available media may be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media (such as solid state disks (SSD)), etc.
  • the aforementioned available media include but Not limited to: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de communication et un appareil de communication. Le procédé peut comprendre les étapes suivantes : un premier appareil terminal détermine une première occasion de recherche (PO) selon un identifiant du premier appareil terminal ; lorsque le premier appareil terminal ne détecte aucun message de recherche sur la première PO, le premier appareil terminal commence à surveiller, dans une première période de temps, un canal de commande de liaison descendante physique (PDCCH) correspondant à un canal de commande de multidiffusion (MCCH) ; et reçoit des premières informations de commande de liaison descendante (DCI) sur le PDCCH, et reçoit un message MCCH selon les premières DCI, le message MCCH comprenant des informations de configuration d'un service de multidiffusion. De cette manière, un PDCCH est surveillé dans une période de temps correspondant à une PO, et un message MCCH est en outre lu au moyen de DCI reçues sur le PDCCH, de manière à acquérir des informations de configuration d'un service de multidiffusion, ce qui permet d'empêcher efficacement que des informations de message d'activation de service de multidiffusion soient manquées parce qu'un UE n'a pas lu un message de recherche, et d'améliorer efficacement la fiabilité de transmission de service de multidiffusion.
PCT/CN2023/104065 2022-08-10 2023-06-29 Procédé de communication et appareil de communication WO2024032221A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107734468A (zh) * 2016-08-12 2018-02-23 中兴通讯股份有限公司 组播传输方法及装置
CN108781346A (zh) * 2016-08-11 2018-11-09 华为技术有限公司 基于组播的无线通信方法、终端设备和基站
CN110583052A (zh) * 2017-05-05 2019-12-17 索尼公司 终端装置、基础设施设备、无线电信系统和方法
WO2022086736A1 (fr) * 2020-10-21 2022-04-28 Qualcomm Incorporated Alerte de service de multidiffusion/diffusion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108781346A (zh) * 2016-08-11 2018-11-09 华为技术有限公司 基于组播的无线通信方法、终端设备和基站
CN107734468A (zh) * 2016-08-12 2018-02-23 中兴通讯股份有限公司 组播传输方法及装置
CN110583052A (zh) * 2017-05-05 2019-12-17 索尼公司 终端装置、基础设施设备、无线电信系统和方法
WO2022086736A1 (fr) * 2020-10-21 2022-04-28 Qualcomm Incorporated Alerte de service de multidiffusion/diffusion

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