WO2021208819A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2021208819A1
WO2021208819A1 PCT/CN2021/086241 CN2021086241W WO2021208819A1 WO 2021208819 A1 WO2021208819 A1 WO 2021208819A1 CN 2021086241 W CN2021086241 W CN 2021086241W WO 2021208819 A1 WO2021208819 A1 WO 2021208819A1
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WO
WIPO (PCT)
Prior art keywords
bwp
information
terminal device
service
dci
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PCT/CN2021/086241
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English (en)
Chinese (zh)
Inventor
于海凤
李秉肇
曹振臻
陈磊
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华为技术有限公司
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Publication of WO2021208819A1 publication Critical patent/WO2021208819A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • a carrier In a fifth-generation (the 5 th generation, 5G) communication system, a carrier can be a maximum bandwidth to 400MHz, but the terminal device supports a maximum bandwidth capabilities may reach such a large bandwidth.
  • the network equipment cannot directly allocate frequency domain resources to the terminal equipment within the range of the carrier bandwidth like the long-term evolution (LTE) system, but needs to be in the carrier first.
  • One or more bandwidth parts (BWP) are configured for the terminal device, and then resources are allocated to the terminal device within the scope of the BWP.
  • network devices can send data of multicast services to terminal devices in a unicast or multicast manner.
  • the network device can use the dedicated BWP of the terminal device to bear the data of the multicast service; for the multicast transmission, the network device needs to use the BWP shared by multiple terminal devices to bear the data of the multicast service. Therefore, when a network device switches from unicast transmission to multicast transmission, how the terminal device switches to the shared BWP to receive the data of the multicast service still needs further research at present.
  • the present application provides a communication method and device, which are used to implement the terminal equipment to switch to the multicast BWP to receive the multicast transmission of the service.
  • the embodiments of the present application provide a communication method, which may be applied to a terminal device, or may also be applied to a chip inside the terminal device. Take the application of this method to a terminal device as an example.
  • the terminal device receives first information from a network device, and the first information is used to indicate that the multicast transmission of the first service is received on the first BWP (that is, The first BWP is a multicast BWP); further, the terminal device may switch the second BWP to the first BWP according to the first information, and receive the multicast transmission of the first service on the first BWP.
  • the network device instructs the terminal device to receive the multicast transmission of the first service on the first BWP through the first information, and then the terminal device switches to the first BWP according to the first information, thereby realizing the terminal device to switch to multicast BWP to receive multicast transmission of services.
  • the first information is the first DCI
  • the first DCI is scrambled by the G-RNTI associated with the first service
  • the BWP corresponding to the G-RNTI is the first BWP.
  • the method further includes: receiving second information from a network device, where the second information is used to configure the correspondence between the G-RNTI and the first BWP.
  • the terminal device can be switched to the multicast BWP on the basis of , Effectively save transmission resources.
  • the second information includes the configuration information of the G-RNTI and the first BWP; wherein, the configuration information of the first BWP includes the frequency domain start position information of the first BWP, and the first BWP is in the frequency domain. Occupied bandwidth information; or, the configuration information of the first BWP includes the RIV corresponding to the first BWP, and the RIV is used to indicate the frequency domain offset position information of the first BWP and the bandwidth information occupied by the first BWP in the frequency domain.
  • the offset position information is used to determine the frequency domain start position information of the first BWP.
  • the second information further includes control resource set information and search space information, and the control resource set information and the search space information are used to indicate the time-frequency location corresponding to the first DCI.
  • the first information includes configuration information of the first BWP; wherein, the configuration information of the first BWP includes frequency domain start position information of the first BWP, and bandwidth information occupied by the first BWP in the frequency domain.
  • the configuration information of the first BWP includes the parameter resource indicator value RIV corresponding to the first BWP, the RIV is used to indicate the frequency domain offset position information of the first BWP and the bandwidth information occupied by the first BWP in the frequency domain, the first The frequency domain offset position information of the BWP is used to determine the frequency domain start position information of the first BWP.
  • the network device does not need to configure the first BWP for the terminal device in advance, but can send the configuration information of the first BWP to the terminal device when the terminal device is required to switch to the first BWP, so that the terminal device can be based on the first BWP.
  • the configuration information is switched to the first BWP, and the multicast transmission of the service is received on the first BWP.
  • the terminal device is switched to the multicast BWP, and on the other hand, the first BWP is indicated in an explicit way, without the need to set the multicast BWP and the G-RNTI associated with the multicast service.
  • the corresponding relationship increases the flexibility of network equipment regulation.
  • the first information includes the identifier of the first BWP; the method further includes: receiving third information from the network device; wherein the third information is used to configure at least one BWP and at least one BWP identifier, The at least one BWP includes the first BWP.
  • the network device can pre-configure the multicast BWP and the multicast BWP identifier for the terminal device, and then when the terminal device is required to switch to a certain multicast BWP (such as the first BWP), the first BWP identifier may be sent to the terminal device, Thus, the terminal device can switch to the first BWP according to the identifier of the first BWP, and receive the multicast transmission of the service on the first BWP.
  • a certain multicast BWP such as the first BWP
  • the first information includes the identity of the group to which the first BWP belongs and the identity of the first BWP in the group; the method further includes: receiving fourth information from the network device; wherein the fourth information is used For configuring at least one BWP, the identity of the group to which the at least one BWP belongs, and the identity of the at least one BWP in the group to which the at least one BWP belongs, the at least one BWP includes the first BWP.
  • the identifier of the group to which the first BWP belongs includes an identifier of the type to which the first BWP belongs.
  • the first information is carried in the second DCI, and the second DCI is scrambled by the G-RNTI associated with the first service; or the first information is carried in the control message of the MAC layer or the control message of the RLC layer Or the control message of the PDCP layer.
  • switching the second BWP to the first BWP according to the first information includes: when it is determined that the following items 1 to 3 are not met, switching the second BWP to the first BWP according to the first information BWP; among them, the first item, when the first information is received, is receiving unicast transmission of the second service on the second BWP; wherein the priority of the first service is lower than or equal to the priority of the second service; or , The priority of the multicast transmission is lower than or equal to the priority of the unicast transmission; the second item, when the first information is received, the multicast transmission of the third service is being received on the second BWP, the priority of the first service It is lower than or equal to the priority of the third service; the third item, when the first information is received, the random access procedure is being performed on the second BWP.
  • the method further includes: switching the first BWP to the third BWP.
  • switching the first BWP to the third BWP includes: sending a request message to a network device, the request message is used to request to perform BWP switching; receiving a response message from the network device, according to the response The message switches the first BWP to the third BWP.
  • the request message includes the identification of at least one candidate BWP; the request message is used to request to perform BWP switching, including: the request message is used to request to switch the first BWP to one of the at least one candidate BWP; response The message includes the identifier of the third BWP, and the third BWP is determined by at least one candidate BWP.
  • At least one candidate BWP includes: the default BWP of the terminal device, and/or, the second BWP.
  • the request message is a MAC layer control message or an RLC layer control message or a PDCP layer control message or an RRC layer message.
  • switching the first BWP to the third BWP includes: determining that the multicast transmission of the first service is not received on the first BWP within the first time period, and the third DCI is not detected, then Switch the first BWP to the third BWP; or, if the third DCI is not detected at the consecutive M candidate time-frequency positions corresponding to the third DCI, switch the first BWP to the third BWP; M is a positive integer; where , The third DCI is used to schedule the multicast transmission of the first service.
  • the first duration is determined according to the indication information from the network device, where the indication information is carried in the system message or the RRC layer message or the fourth DCI, and the fourth DCI passes the G- of the first service. RNTI scrambling.
  • the embodiments of the present application provide a communication method, which can be applied to a network device, or can also be applied to a chip inside the network device.
  • the network device sends first information to the terminal device, the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; and, the network device is The multicast transmission of the first service is sent on the first BWP.
  • the first information is the first DCI from the network device, the first DCI is scrambled by the G-RNTI associated with the first service; the BWP corresponding to the G-RNTI is the first BWP.
  • the method further includes: sending second information to the terminal device, where the second information is used to configure the correspondence between the G-RNTI and the first BWP.
  • the second information includes the configuration information of the G-RNTI and the first BWP; wherein, the configuration information of the first BWP includes the frequency domain start position information of the first BWP, and the first BWP is in the frequency domain. Occupied bandwidth information; or, the configuration information of the first BWP includes the RIV corresponding to the first BWP, and the RIV is used to indicate the frequency domain offset position information of the first BWP and the bandwidth information occupied by the first BWP in the frequency domain.
  • the frequency domain offset position information of the BWP is used to determine the frequency domain start position information of the first BWP.
  • the second information further includes control resource set information and search space information, and the time-frequency position corresponding to the control resource set information and the search space information is used to carry the first DCI.
  • the first information includes configuration information of the first BWP; wherein, the configuration information of the first BWP includes frequency domain start position information of the first BWP, and bandwidth information occupied by the first BWP in the frequency domain.
  • the configuration information of the first BWP includes the RIV corresponding to the first BWP, the RIV is used to indicate the frequency domain offset position information of the first BWP and the bandwidth information occupied by the first BWP in the frequency domain, and the frequency domain of the first BWP The offset position information is used to determine the frequency domain start position information of the first BWP.
  • the first information includes the identification of the first BWP; the method further includes: the network device sends third information to the terminal device; wherein the third information is used to configure the identification of at least one BWP and at least one BWP ,
  • the at least one BWP includes the first BWP.
  • the first information includes the identity of the group to which the first BWP belongs and the identity of the first BWP in the group; the method further includes: the network device sends fourth information to the terminal device; wherein, the fourth information It is used to configure at least one BWP, the identifier of the group to which the at least one BWP belongs, and the identifier of the at least one BWP in the group to which the at least one BWP belongs, and the at least one BWP includes the first BWP.
  • the identifier of the group to which the first BWP belongs includes an identifier of the type to which the first BWP belongs.
  • the first information is carried in the second DCI, and the second DCI is scrambled by the G-RNTI associated with the first service; or the first information is carried in the control message of the MAC layer or the control message of the RLC layer Or the control message of the PDCP layer.
  • the method further includes: receiving a request message from a terminal device, the request message is used to request to perform BWP handover; and sending a response message to the terminal device according to the request message, the response message being used to Instruct to switch the first BWP to the third BWP.
  • the request message includes the identification of at least one candidate BWP; the request message is used to request to perform BWP switching, including: the request message is used to request to switch the first BWP to one of the at least one candidate BWP; response The message includes the identifier of the third BWP, and the third BWP is determined according to at least one candidate BWP.
  • At least one candidate BWP includes: the default BWP of the terminal device, and/or, the second BWP.
  • the request message is a MAC layer control message or an RLC layer control message or a PDCP layer control message or an RRC layer message.
  • the method further includes: sending indication information to the terminal device, the indication information is used to indicate the first duration; the indication information is carried in the system message or the RRC layer message or the fourth DCI, and the fourth DCI passes the first G-RNTI scrambling for a service.
  • the communication method provided in the above second aspect corresponds to the communication method provided in the first aspect, and the beneficial effects of the corresponding technical features can be referred to the description of the first aspect, and will not be repeated.
  • the embodiments of the present application provide a communication method, which may be applied to a terminal device, or may also be applied to a chip inside the terminal device. Take the application of this method to a terminal device as an example. In this method, the terminal device receives first information from a network device.
  • the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; when it is determined that the following For at least one of the first to third items, the first message is ignored; among them, the first item, when the first message is received, is performing unicast transmission of the second service on the second BWP; among them, the first The priority of one service is lower than or equal to the priority of the second service; or, the priority of multicast transmission is lower than or equal to the priority of unicast transmission; the second item, when the first information is received, is in the second The multicast data of the third service is transmitted on the BWP, and the priority of the first service is lower than or equal to the priority of the third service; the third item, when the first information is received, the random access process is being performed on the second BWP .
  • the terminal device when the terminal device receives the first information, it can first determine whether to perform a higher priority operation on the currently activated BWP, if it is, it can temporarily not perform the BWP switching operation, otherwise, it can perform the BWP switching operation , Which can effectively avoid interruption of higher priority operations.
  • the method further includes: sending notification information to the network device, where the notification information is used to indicate that the terminal device has ignored the first information.
  • the terminal device after the terminal device ignores the first information, it sends notification information to the network device, so that the network device knows that the terminal device has ignored the first information, which facilitates subsequent unicast transmission of the first service to the terminal device.
  • the method further includes: receiving the unicast transmission of the first service on the second BWP.
  • the embodiments of the present application provide a communication method, which can be applied to a network device, or can also be applied to a chip inside the network device.
  • the network device sends first information to the terminal device, the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; and the network device determines After ignoring the first information, the terminal device sends the unicast transmission of the first service to the terminal device on the second BWP.
  • the network device determining that the terminal device ignores the first information includes: the network device receives notification information from the terminal device, and determining that the terminal device ignores the first information according to the notification information.
  • the communication method provided in the fourth aspect described above corresponds to the communication method provided in the third aspect, and the beneficial effects of the corresponding technical features can be referred to the description of the third aspect, and will not be repeated.
  • the present application provides a communication device.
  • the communication device may be, for example, a terminal device or a chip provided in the terminal device.
  • the communication device has the function of implementing the first aspect or the third aspect.
  • the communication device includes a module or unit or means corresponding to the steps involved in the first aspect or the third aspect.
  • the function Or the unit or means can be realized by software, or by hardware, and can also be realized by hardware executing corresponding software.
  • the communication device includes a processing unit and a communication unit.
  • the communication unit can be used to send and receive signals to achieve communication between the communication device and other devices.
  • the communication unit is used to receive Configuration information of the network device; the processing unit can be used to perform some internal operations of the communication device.
  • the communication unit is configured to receive first information from a network device, where the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; the processing unit uses Therefore, the second BWP is switched to the first BWP according to the first information; the communication unit is further configured to receive the multicast transmission of the first service on the first BWP.
  • the first information is the first DCI
  • the first DCI is scrambled by a group wireless G-RNTI associated with the first service
  • the BWP corresponding to the G-RNTI is the first BWP.
  • the communication unit is further configured to receive second information from the network device, where the second information is used to configure the correspondence between the G-RNTI and the first BWP.
  • the first information includes configuration information of the first BWP; wherein, the configuration information of the first BWP includes frequency domain start position information of the first BWP, and the first BWP is in the frequency domain.
  • the configuration information of the first BWP includes the parameter resource indicator value RIV corresponding to the first BWP, and the RIV is used to indicate the frequency domain offset position information of the first BWP and the frequency domain offset position information of the first BWP
  • the occupied bandwidth information and the frequency domain offset position information of the first BWP are used to determine the frequency domain start position information of the first BWP.
  • the first information includes the identifier of the first BWP; the communication unit is further configured to receive third information from the network device; wherein, the third information is used to configure at least one An identifier of the BWP and the at least one BWP, and the at least one BWP includes the first BWP.
  • the first information includes the identity of the group to which the first BWP belongs and the identity of the first BWP in the group; the communication unit is further configured to receive the fourth information from the network device. Information; wherein the fourth information is used to configure at least one BWP, the identity of the group to which the at least one BWP belongs, the identity of the at least one BWP in the group to which the at least one BWP belongs, and the at least one BWP Including the first BWP.
  • the first information is carried in the second DCI, and the second DCI is scrambled by the G-RNTI associated with the first service; or, the first information is carried in the MAC layer control message or RLC layer control messages or PDCP layer control messages.
  • the processing unit is specifically configured to switch the second BWP to the first BWP according to the first information when it is determined that the following items 1 to 3 are not met: , When the first information is received, the unicast transmission of the second service is being received on the second BWP; wherein the priority of the first service is lower than or equal to the priority of the second service; or, the multicast transmission is The priority is lower than or equal to the priority of unicast transmission; the second item, when the first information is received, the multicast transmission of the third service is being received on the second BWP, and the priority of the first service is lower than or equal to all The priority of the third service; the third item, when the first information is received, the random access process is being performed on the second BWP.
  • the communication unit is further configured to send a request message to the network device, where the request message is used to request to perform BWP handover; and, to receive a response message from the network device, according to the The response message switches the first BWP to the third BWP.
  • the request message includes the identification of at least one candidate BWP; the request message is used to request to perform BWP switching, and includes: the request message is used to request to switch the first BWP to all One of the at least one candidate BWP; the response message includes an identifier of a third BWP, and the third BWP is determined according to the at least one candidate BWP.
  • the communication unit is specifically configured to determine that the multicast transmission of the first service is not received on the first BWP within the first time period, and the third DCI is not detected, Send a request message to the network device; or, if the third DCI is not detected at the consecutive M candidate time-frequency positions corresponding to the third DCI, send a request message to the network device; M is a positive integer; where The third DCI is used to schedule the multicast transmission of the first service.
  • the processing unit is specifically configured to determine that the multicast transmission of the first service is not received on the first BWP within the first time period, and the third DCI is not detected, Then switch the first BWP to the third BWP; or, if the third DCI is not detected at the consecutive M candidate time-frequency positions corresponding to the third DCI, switch the first BWP to the third BWP; M is positive An integer; where the third DCI is used to schedule the multicast transmission of the first service.
  • the communication device includes a processor, and may also include a transceiver.
  • the transceiver is used to send and receive signals, and the processor executes program instructions to complete the first or third aspect.
  • the communication device may further include one or more memories, and the memories are used for coupling with the processor.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may store necessary computer programs or instructions for realizing the functions related to the first aspect or the third aspect.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any of the possible designs or implementations in the first aspect or the third aspect. Methods.
  • the communication device includes a processor and a memory
  • the memory can store necessary computer programs or instructions for realizing the functions involved in the first aspect or the third aspect.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any of the possible designs or implementations in the first aspect or the third aspect. Methods.
  • the communication device includes at least one processor and an interface circuit, where at least one processor is used to communicate with other devices through the interface circuit, and execute the first aspect or the third aspect described above. Any possible design or method of implementation.
  • the present application provides a communication device.
  • the communication device may be, for example, a network device or a chip set inside the network device.
  • the communication device is capable of implementing the functions related to the second aspect or the fourth aspect.
  • the communication device includes modules or units or means corresponding to the steps related to the second or fourth aspect.
  • the functions or units Or means can be realized by software, or by hardware, or by hardware executing corresponding software.
  • the communication device includes a processing unit and a communication unit.
  • the communication unit can be used to send and receive signals to achieve communication between the communication device and other devices.
  • the communication unit is used to communicate with the terminal.
  • the device sends system information; the processing unit can be used to perform some internal operations of the communication device.
  • the communication unit is configured to send first information to the terminal device, the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; and, in the first BWP The multicast transmission of the first service is sent on.
  • the first information is the first DCI, which is scrambled by the G-RNTI associated with the first service; and the BWP corresponding to the G-RNTI is the first BWP.
  • the communication unit is further configured to send second information to the terminal device, where the second information is used to configure the correspondence between the G-RNTI and the first BWP.
  • the first information includes configuration information of the first BWP; wherein, the configuration information of the first BWP includes frequency domain start position information of the first BWP, and the first BWP is in the frequency domain.
  • the configuration information of the first BWP includes the parameter resource indicator value RIV corresponding to the first BWP, and the RIV is used to indicate the frequency domain offset position information of the first BWP and the frequency domain offset position information of the first BWP Occupied bandwidth information, and the frequency domain offset position information is used to determine the frequency domain start position information.
  • the first information includes the identifier of the first BWP; the communication unit is further configured to send third information to the terminal device; wherein, the third information is used to configure at least one BWP And the identification of the at least one BWP, the at least one BWP includes the first BWP.
  • the first information includes the identity of the group to which the first BWP belongs and the identity of the first BWP in the group; the communication unit is further configured to send fourth information to the terminal device Wherein, the fourth information is used to configure the at least one BWP, the identity of the group to which the at least one BWP belongs, the identity of the at least one BWP in the group to which the at least one BWP belongs, and the at least one The BWP includes the first BWP.
  • the first information is carried in the second DCI, and the second DCI is scrambled by the G-RNTI associated with the first service; or, the first information is carried in the MAC layer control message or RLC layer control messages or PDCP layer control messages.
  • the communication unit is further configured to receive a request message from the terminal device, where the request message is used to request to perform BWP handover; and send a response to the terminal device according to the request message Message, the response message is used to indicate to switch the first BWP to the third BWP.
  • the request message includes the identification of at least one candidate BWP; the request message is used to request to perform BWP switching, and includes: the request message is used to request to switch the first BWP Is one BWP of the at least one candidate BWP; the response message includes an identifier of a third BWP, and the third BWP is determined according to the at least one candidate BWP.
  • the communication device includes a processor, and may also include a transceiver, where the transceiver is used to send and receive signals, and the processor executes program instructions to complete the above-mentioned second or fourth aspect.
  • the communication device may further include one or more memories, and the memories are used for coupling with the processor.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may store necessary computer programs or instructions for realizing the functions related to the second aspect or the fourth aspect.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any possible design or implementation of the second aspect or the fourth aspect. Methods.
  • the communication device includes a processor and a memory, and the memory can store necessary computer programs or instructions for realizing the functions related to the second aspect or the fourth aspect.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any possible design or implementation of the second aspect or the fourth aspect. Methods.
  • the communication device includes at least one processor and an interface circuit, where at least one processor is used to communicate with other devices through the interface circuit, and execute the second or fourth aspect described above. Any possible design or method of implementation.
  • the present application provides a communication system, the communication system includes a terminal device, and the terminal device is used to execute any one of the possible design methods of the first aspect or the third aspect; the communication system may also include A network device, which is used to execute any one of the possible design methods of the second aspect or the fourth aspect described above.
  • the present application provides a computer-readable storage medium, which stores computer-readable instructions.
  • the computer reads and executes the computer-readable instructions, the computer executes the first aspects to Any possible design method of the fourth aspect.
  • this application provides a computer program product, which when a computer reads and executes the computer program product, causes the computer to execute any of the possible design methods of the first to fourth aspects.
  • the present application provides a chip including a processor coupled to a memory, and configured to read and execute a software program stored in the memory, so as to implement the first to fourth aspects described above. Any one of the possible design methods.
  • FIG. 1 is a schematic diagram of a network architecture to which an embodiment of this application is applicable;
  • FIG. 2a is a schematic diagram of another network architecture to which an embodiment of this application is applicable.
  • Figure 2b is a schematic diagram of information provided by an embodiment of the application being transmitted between layers;
  • FIG. 3 is a schematic diagram of another network architecture to which the embodiments of this application are applicable.
  • 4a, 4b, and 4c are schematic diagrams of the configuration of the BWP in the carrier bandwidth provided by an embodiment of the application;
  • FIG. 5 is a schematic diagram of a flow corresponding to the communication method provided in the first embodiment of the application.
  • FIG. 6 is a schematic diagram of the meaning of each parameter of the search space provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of a process corresponding to the communication method provided in the second embodiment of this application.
  • FIG. 8 is a schematic diagram of a flow corresponding to the communication method provided in the third embodiment of this application.
  • FIG. 9 is a schematic diagram of a flow corresponding to the communication method provided in the fourth embodiment of this application.
  • Fig. 10a is an example diagram of a MAC sub-PDU provided by an embodiment of the application.
  • FIG. 10b is an example diagram of RLC PDU or PDCP PDU provided by an embodiment of this application.
  • FIG. 10c is another example diagram of the MAC sub-PDU provided by the embodiment of the application.
  • FIG. 10d is another example diagram of RLC PDU or PDCP PDU provided by an embodiment of this application.
  • FIG. 11 is a possible exemplary block diagram of a device involved in an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • Terminal device It can be a wireless terminal device that can receive network device scheduling and instruction information.
  • a wireless terminal device can be a device that provides voice and/or data connectivity to users, or a handheld device with wireless connection function, or Other processing equipment connected to the wireless modem.
  • a terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN).
  • the terminal device can be a mobile terminal device, such as a mobile phone (or called a "cellular" phone, mobile phone). phone)), computers and data cards, for example, can be portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile devices, which exchange language and/or data with the wireless access network.
  • Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station (remote station), access point ( access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), subscriber station (SS), user terminal equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc.
  • the terminal device may also be a wearable device and a next-generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a public land mobile network (PLMN) that will evolve in the future.
  • PLMN public land mobile network
  • Network equipment It can be a device in a wireless network.
  • a network device can be a radio access network (RAN) node (or device) that connects terminal equipment to the wireless network, and it can also be called a base station.
  • RAN equipment are: new generation Node B (gNodeB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), wireless network in 5G communication system Controller (radio network controller, RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved Node B) , Or home Node B, HNB, baseband unit (BBU), or wireless fidelity (Wi-Fi) access point (AP), etc.
  • gNodeB new generation Node B
  • TRP transmission reception point
  • eNB evolved Node B
  • eNB evolved Node B
  • wireless network in 5G communication system Controller radio network controller
  • RNC radio
  • the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.
  • the network device may be another device that provides wireless communication functions for the terminal device.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • a device that provides a wireless communication function for a terminal device is referred to as a network device.
  • At least one of A, B, and C includes A, B, C, AB, AC, BC, or ABC.
  • the ordinal numbers such as “first” and “second” mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects. degree.
  • FIG. 1 is a schematic diagram of a network architecture to which an embodiment of this application is applicable.
  • the terminal device 130 can access a wireless network to obtain services from an external network (such as the Internet) through the wireless network, or communicate with other devices through the wireless network, for example, it can communicate with other terminal devices.
  • the wireless network includes RAN and core network (CN), where RAN is used to connect terminal equipment (such as terminal equipment 1301 or terminal equipment 1302) to the wireless network, and CN is used to manage terminal equipment and provide Gateway for external network communication.
  • RAN is used to connect terminal equipment (such as terminal equipment 1301 or terminal equipment 1302) to the wireless network
  • CN is used to manage terminal equipment and provide Gateway for external network communication.
  • the RAN may include one or more RAN devices, such as the RAN device 1101 and the RAN device 1102.
  • the CN may include one or more CN devices, such as the CN device 120.
  • the CN device 120 may be an access and mobility management function (AMF) entity or a user plane function (UPF) entity, etc. .
  • AMF access and mobility management function
  • UPF user plane function
  • the number of devices in the communication system shown in FIG. 1 is only for illustration, and the embodiments of the present application are not limited to this. In actual applications, the communication system may also include more terminal devices and more RAN devices. Other devices can also be included.
  • Fig. 2a is a schematic diagram of another network architecture to which an embodiment of this application is applicable.
  • the network architecture includes CN equipment, RAN equipment and terminal equipment.
  • the RAN equipment includes a baseband device and a radio frequency device.
  • the baseband device can be implemented by one node or by multiple nodes.
  • the radio frequency device can be implemented remotely from the baseband device, or integrated in the baseband device, or part of its functions. Independent integration, part of the functions are integrated in the baseband device.
  • the RAN equipment includes a baseband device and a radio frequency device.
  • the radio frequency device can be arranged remotely from the baseband device. unit.
  • the control plane protocol layer structure can include the radio resource control (radio resource control, RRC) layer and the packet data convergence protocol (packet data convergence protocol, PDCP) layer. , Radio link control (RLC) layer, media access control (MAC) layer and physical layer and other protocol layer functions; user plane protocol layer structure can include PDCP layer, RLC layer, MAC layer And the function of the protocol layer such as the physical layer; in a possible implementation, the PDCP layer may also include a service data adaptation protocol (SDAP) layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • RLC Radio link control
  • MAC media access control
  • user plane protocol layer structure can include PDCP layer, RLC layer, MAC layer And the function of the protocol layer such as the physical layer
  • SDAP service data adaptation protocol
  • Control plane protocol layer such as the PDCP layer, RLC layer, MAC layer, and physical layer.
  • PDCP layer, RLC layer, MAC layer, and physical layer It can also be collectively referred to as the access layer.
  • the following row transmission is taken as an example.
  • FIG 2b for a schematic diagram of control information transmission between layers.
  • the downward arrow represents information transmission
  • the upward arrow represents information reception.
  • the PDCP layer obtains information from the upper layer, it transmits the information to the RLC layer and the MAC layer, and then transmits the information from the MAC layer to the physical layer, and then performs wireless transmission through the physical layer.
  • Information is correspondingly encapsulated in each layer.
  • the information received by a layer from the upper layer of this layer is regarded as the service data unit (SDU) of this layer. After layer encapsulation, it becomes a PDU, and then is passed to the lower layer.
  • SDU service data unit
  • One layer For example, the information received by the PDCP layer from the upper layer is called PDCP SDU, the information sent by the PDCP layer to the lower layer is called PDCP PDU; the information received by the RLC layer from the upper layer is called RLC SDU, and the information sent by the RLC layer to the lower layer is called RLC PDU. ;
  • the information received by the MAC layer from the upper layer is called MAC SDU, and the information sent by the MAC layer to the lower layer is called MAC PDU.
  • the connections between layers are mostly corresponded in the way of channels.
  • the RLC layer and the MAC layer correspond to each other through a logical channel (LCH), and the MAC layer and the physical layer correspond to each other through a transport channel.
  • LCH logical channel
  • the MAC layer and the physical layer correspond to each other through a transport channel.
  • a physical channel which is used to correspond to the other end. The physical layer.
  • the RAN equipment can be implemented by one node to implement the functions of the RRC, PDCP, RLC, and MAC protocol layers, or multiple nodes can implement the functions of these protocol layers.
  • RAN equipment may include CUs and DUs, and multiple DUs may be centrally controlled by one CU.
  • the CU and DU can be divided according to the protocol layer of the wireless network. For example, the functions of the PDCP layer and the above protocol layers are set in the CU, and the protocol layers below the PDCP, such as the RLC layer and the MAC layer, are set in the DU.
  • This type of protocol layer division is just an example, it can also be divided in other protocol layers, for example, in the RLC layer, the functions of the RLC layer and above protocol layers are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; Or, in a certain protocol layer, for example, part of the functions of the RLC layer and the functions of the protocol layer above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer are set in the DU. In addition, it can also be divided in other ways, for example, by time delay.
  • the radio frequency device can be integrated independently, not placed in the DU, can also be integrated in the DU, or partly remote and partly integrated in the DU, and there is no restriction here.
  • FIG. 3 is a schematic diagram of another network architecture to which the embodiments of this application are applicable.
  • the control plane (CP) and the user plane (UP) of the CU can also be separated and implemented by dividing them into different entities, which are respectively the control plane (CP) CU entity ( That is, the CU-CP entity) and the user plane (UP) CU entity (ie, the CU-UP entity).
  • CP control plane
  • UP user plane
  • the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU.
  • the DU may directly pass the protocol layer encapsulation without analyzing the signaling and transparently transmit it to the terminal device or CU.
  • the sending or receiving of the signaling by the DU includes this scenario.
  • RRC or PDCP layer signaling will eventually be processed as PHY layer signaling and sent to the terminal device, or converted from received PHY layer signaling.
  • the RRC or PDCP layer signaling can also be considered to be sent by the DU, or sent by the DU and the radio frequency device.
  • the network architecture illustrated in Figure 1, Figure 2a, or Figure 3 can be applied to various radio access technology (RAT) communication systems, such as 4G (or LTE) communication systems, or It is a 5G (or new radio (NR)) communication system, or a transitional system between an LTE communication system and a 5G communication system.
  • RAT radio access technology
  • the transitional system can also be called a 4.5G communication system, or of course it can be The communication system of the future.
  • the network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with communication With the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.
  • the devices in the following embodiments of the present application may be located in terminal equipment or network equipment according to their realized functions.
  • the network device may be a CU, or DU, or a RAN device including CU and DU.
  • Bandwidth the specific value can be 10MHz, 15MHz, 20MHz, 50MHz, 100MHz, or 400MHz, etc.) to configure the BWP for the terminal device.
  • one carrier can be configured with multiple BWPs, for example, one carrier can be configured with 4 BWPs.
  • BWP may sometimes be called carrier bandwidth part or other names. This application does not limit the name. For ease of description, the name is BWP as an example.
  • a BWP includes K (K>0) subcarriers; or, a BWP is a frequency domain resource where N non-overlapping resource blocks (resource blocks, RB) are located, and the subcarrier spacing of the RB may be 15KHz, 30KHz, 60KHz, 120KHz, 240KHz, 480KHz or other values (such as 7.5KHz or 1.25KHz); or, a BWP is a frequency domain resource where m (m>0) non-overlapping resource block groups (RBG) are located,
  • an RBG includes P (P>0) consecutive RBs, and the subcarrier spacing (SCS) of the RB can be 15KHz, 30KHz, 60KHz, 120KHz, 240KHz, 480KHz or other values, such as an integer of 2. Times.
  • FIG. 4a to FIG. 4c the configuration of the three BWPs in the carrier bandwidth provided by the embodiment of this application.
  • Figure 4a shows the configuration of a BWP in the carrier bandwidth.
  • the network device can first allocate a BWP within the bandwidth capability of the terminal to the terminal device. Of course, it can further allocate some or all of the resources in the BWP to the terminal device for communication.
  • the network device can configure different BWP conditions for the terminal device according to the actual scenario. For example, in order to save the power consumption of the terminal device, the network device may allocate the BWP to the terminal device according to the service volume of the terminal device.
  • a smaller BWP can be allocated to the terminal device to receive control information and a small amount of data information, such as BWP1 shown in Figure 4b; when the terminal device has a large amount of service data
  • a larger BWP can be allocated to the terminal device, such as BWP2 as shown in Figure 4b.
  • the 5G communication system can support multiple service types and communication scenarios, different parameters can be configured for different service types and communication scenarios, and network devices can assign corresponding BWPs to terminal devices according to different service types of terminal devices. As shown in FIG. 4c, a BWP can correspond to a service type.
  • the BWP can be configured with a frame structure parameter (numerology) that can meet the service requirements.
  • a frame structure parameter number of BWPs
  • different BWPs can occupy partially overlapping frequency domain resources.
  • different BWPs can also occupy completely different frequency domain resources and use different numerology.
  • the numerology corresponding to different BWPs may be the same or different, which is not limited in the present application. It is understandable that in FIGS. 4a to 4c, only one or two BWPs are configured in one carrier as an example. In actual applications, multiple BWPs may be configured in a carrier, which is not limited in the embodiment of the present application.
  • BWP can be roughly divided into two categories: 1) Initial BWP (Initial BWP), which is the BWP used by the terminal device in the initial access phase; 2) Dedicated BWP (Dedicated BWP), which is after the terminal device enters the connected state.
  • the BWP configured by the network device for the terminal device. Under normal circumstances, for a terminal device, the network device can configure up to 4 dedicated BWPs and the identification of each dedicated BWP through RRC messages; at the same time, the terminal device can only have 1 dedicated BWP in the active state, that is, the terminal device only One BWP can be used.
  • the first activated BWP (First Active BWP) may be indicated by RRC signaling.
  • the network device may configure a default (default BWP) for the terminal device through an RRC reconfiguration (Reconfiguration) message, and the default BWP may be one of the dedicated BWPs. If the network device is not configured with the default BWP, the terminal device can consider the initial BWP as the default BWP.
  • default BWP default BWP
  • Reconfiguration RRC reconfiguration
  • the one or more dedicated BWPs are in an inactive state.
  • the network device may send instruction information to the terminal device to instruct to activate one of the dedicated BWPs; where the instruction information may be carried in an RRC message.
  • the terminal device receives the instruction information and activates the dedicated BWP, and then can communicate with the network device on the dedicated BWP. Subsequently, the terminal device can also switch between multiple BWPs.
  • the multiple BWPs include an initial BWP and a dedicated BWP. There may be multiple situations for the terminal device to switch between the initial BWP and the dedicated BWP.
  • the terminal device determines that it needs to initiate a random access process, the currently activated BWP is not configured with random access resources, and the other BWP is configured with random access resources, and can then be switched to another BWP to facilitate access to another BWP Initiate a random access procedure.
  • the other BWP may be the initial BWP of the terminal device or other dedicated BWP. In this case, the BWP handover can be triggered by the terminal device.
  • the network device when the network device determines that the load of the BWP currently activated by the terminal device is large or the resources of the BWP currently activated by the terminal device are insufficient, it can instruct the terminal device to switch to another BWP, and the other BWP can be other dedicated terminal devices.
  • BWP BWP.
  • a network device sends downlink control information (DCI) to a terminal device.
  • the DCI is used to instruct the terminal device to switch to another BWP.
  • the DCI is added by the cell-radio network temporary identifier (C-RNTI).
  • C-RNTI cell-radio network temporary identifier
  • the DCI includes the identifier of another BWP; accordingly, after detecting the DCI according to the C-RNTI, the terminal device can switch to another BWP and communicate with the network device on the other BWP.
  • Multicast transmission technology is a transmission technology in which one sender sends data and multiple receivers receive data; for example, a network device sends data and multiple terminal devices receive data.
  • one possible multicast transmission technology is a single cell point to multipoint (single cell point to multipoint, SC-PTM) technology.
  • SC-PTM single cell point to multipoint
  • a physical downlink shared channel (physical downlink share channel, PDSCH) can be used to transmit multicast service data.
  • the PDSCH carrying multicast services can be called multicast PDSCH.
  • the network equipment may pre-configure the association relationship between the multicast service and the group-radio network temporary identity (G-RNTI), and each multicast service may be associated with one G-RNTI.
  • G-RNTI group-radio network temporary identity
  • a network device can send downlink control information (DCI) carried on a physical downlink control channel (PDCCH) to multiple terminal devices interested in multicast services.
  • DCI Downlink control information
  • the DCI Used to schedule the multicast PDSCH carrying the multicast service.
  • the DCI can be scrambled by the G-RNTI associated with the multicast service; accordingly, after multiple terminal devices detect the DCI according to the G-RNTI associated with the multicast service ,
  • the multicast PDSCH can be received according to the scheduling information included in the DCI.
  • the network device can send DCI to the terminal device.
  • the DCI is used to schedule a unicast PDSCH carrying a certain service (the service can be a unicast service or a multicast service).
  • the DCI can pass C-RNTI Scrambling; accordingly, after detecting the DCI according to the C-RNTI, the terminal device can receive the unicast PDSCH according to the scheduling information included in the DCI.
  • the BWP in the current 5G communication system includes the initial BWP and the dedicated BWP of the terminal device.
  • the terminal device can communicate with the network device on a dedicated BWP, such as receiving data sent by the network device in a unicast mode.
  • V2X vehicle to everything
  • the 5G communication system is for the realization of business
  • One possible way for multicast transmission is to introduce multicast BWP.
  • the multicast BWP can be used for multicast transmission of services.
  • the multicast BWP can be a BWP shared by multiple terminal devices, so that multiple terminal devices can receive data sent by a network device in a multicast manner on the multicast BWP.
  • the embodiments of this application will study the related implementation of multicast BWP.
  • the terminal device can switch between the initial BWP, the dedicated BWP and the multicast BWP; among them, the specific implementation of the terminal device switching between the initial BWP and the dedicated BWP can be referred to the previous description, and the terminal How to switch the device to multicast BWP still needs further research.
  • the embodiment of the present application provides a communication method for implementing the terminal device to switch to the multicast BWP to receive the multicast transmission of the service.
  • the method can be executed by two communication devices, such as a first communication device and a second communication device, where the first communication device can be a network device or can support the network device to implement the functions required by the method.
  • the communication device may also be other communication devices, such as a chip or a chip system.
  • the second communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course it may also be another communication device, such as a chip or a chip system.
  • the method is executed by a network device and a terminal device as an example, that is, an example is that the first communication device is a network device and the second communication device is a terminal device.
  • the network device used to implement the embodiment shown in FIG. 5, FIG. 7, FIG. 8 or FIG. 9 described below may be the RAN shown in FIG. Device 110
  • the terminal device used to execute the embodiment shown in FIG. 5, FIG. 7, FIG. 8 or FIG. 9 described below may be the terminal device 130 shown in FIG.
  • the correspondence between the multicast BWP and the G-RNTI associated with the multicast service can be set.
  • the network device determines that it needs to send the multicast transmission of the first service, it can send DCI (referred to as DCI-1 for ease of description) to multiple terminal devices, and DCI-1 is scrambled by the first G-RNTI associated with the first service ;
  • DCI-1 is scrambled by the first G-RNTI associated with the first service ;
  • the first service is a multicast service
  • multiple terminal devices refer to terminal devices that are interested in the first service.
  • the terminal devices after multiple terminal devices detect DCI-1 according to the first G-RNTI, they can determine that the first G-RNTI corresponds to the first BWP according to the correspondence between the multicast BWP and the G-RNTI, and then can switch to The multicast transmission of the first service is received on the first BWP.
  • a possible implementation process will be described by taking the interaction between a network device and a certain terminal device interested in the first service as an example.
  • FIG. 5 is a schematic flow diagram corresponding to the communication method provided in Embodiment 1 of this application. As shown in Figure 5, it includes:
  • Step 501 The network device sends configuration information 1 and configuration information 2 to the terminal device; among them, the configuration information 1 can be used to configure one or more multicast BWPs, and the configuration information 2 can be used to configure one or more dedicated BWPs for the terminal device. .
  • the terminal device can receive configuration information 1 and configuration information 2.
  • configuration information 1 and configuration information 2 are described in detail.
  • Configuration information 1 can be used to configure one or more multicast BWPs (such as BWP1 and BWP2). Further, configuration information 1 can also configure the correspondence between one or more multicast BWPs and one or more G-RNTIs, where , Multicast BWP and G-RNTI can correspond one-to-one. It should be noted that since each multicast service is associated with one G-RNTI, the correspondence between the multicast BWP and the G-RNTI can also be replaced with the correspondence between the multicast BWP and the multicast service.
  • configuration information 1 may include configuration information of multiple multicast BWPs and G-RNTIs corresponding to multiple multicast BWPs, and optionally, may also include physical layer configuration information corresponding to multiple multicast BWPs, respectively. . As shown in Table 1, it is an example of the information included in the configuration information 1.
  • Table 1 Examples of information included in configuration information 1
  • the configuration information 1 may include configuration information of multiple multicast services (for example, multicast service 1 and multicast service 2).
  • the configuration information of multicast service 1 may include the configuration information of G-RNTI1, BWP1 corresponding to G-RNTI1, and optionally, the physical layer configuration corresponding to BWP1. information.
  • Table 2 Examples of information included in configuration information 1
  • Multicast service Multicast service configuration information Multicast service 1 G-RNTI1, BWP1 configuration information, BWP1 corresponding physical layer configuration information Multicast service 2 G-RNTI2, BWP2 configuration information, BWP2 corresponding physical layer configuration information
  • the configuration information of the multicast service may also include other possible information, such as DRX parameters, which is not specifically limited.
  • the configuration information of BWP1 may include the frequency domain start position information of BWP1 and the bandwidth information occupied by BWP1 in the frequency domain; and after receiving the configuration information 1, the terminal device may according to the frequency domain start position information of BWP1 and BWP1 in the frequency domain.
  • the occupied bandwidth information in the frequency domain determines the specific position of BWP1 in the carrier bandwidth.
  • the frequency domain start position information of BWP1 may refer to the absolute position information of BWP1 relative to CRB0; the bandwidth information occupied by BWP1 in the frequency domain may refer to the RB or physical resource block ( The number of physical resource blocks (PRB).
  • the configuration information of BWP1 may include the frequency domain offset location information of BWP1 and the bandwidth information (locationAndBandwidth) occupied by BWP1 in the frequency domain.
  • locationAndBandwidth can also be understood as a parameter resource indication value (RIV).
  • RIV is used to indicate the frequency domain offset position information of BWP1 and the bandwidth information occupied by BWP1 in the frequency domain; after receiving configuration information 1, the terminal device can obtain the frequency domain offset position information of BWP1 and The bandwidth information occupied by BWP1 in the frequency domain, and the frequency domain start position information of BWP1 according to the frequency domain offset position information and offset information of BWP1, and then according to the frequency domain start position information of BWP1 and BWP1 in the frequency domain The bandwidth information occupied by the above determines the specific position of BWP1 in the carrier bandwidth.
  • the frequency domain offset position information of BWP1 is an intermediate quantity used to determine the frequency domain start position information of BWP1;
  • the offset information (offsetToCarrier) may refer to the minimum/value of the frequency domain reference point (PointA) and the carrier.
  • the frequency domain offset between the lowest available subcarriers.
  • the maximum value of the frequency domain offset corresponds to 275*8-1.
  • the offset information may be included in the configuration information 1, or may also be sent by the network device to the terminal device through other possible messages, which is not specifically limited.
  • the configuration information of the BWP1 may also include other possible information, such as the subcarrier interval of the BWP1, the length indication of the cyclic prefix, etc., which are not specifically limited.
  • the length of the cyclic prefix indicates whether to use the extended cyclic prefix on BWP1, for example, if the configuration information of BWP1 does not include or does not set this indication, the terminal device can use the normal cyclic prefix, on the contrary, if the configuration information of BWP1 contains this Indicates, the terminal device can use the extended cyclic prefix.
  • the normal cyclic prefix is applicable to all subcarrier intervals and time slot formats, and the extended cyclic prefix is applicable to 60kHz subcarrier intervals (see 3GPP TS 38.211, section 4.2).
  • the physical layer configuration information corresponding to BWP1 may include a search space (search space) and a control resource set (CORESET), and there may be an association relationship between the search space and CORESET.
  • search space and the CORESET associated with the search space can be used to indicate multiple candidate time-frequency positions corresponding to the DCI, and the multiple candidate time-frequency positions are located in BWP1.
  • the network device can send DCI to the terminal device at some candidate time-frequency positions among the multiple candidate time-frequency positions of BWP1; accordingly, after receiving the physical layer configuration information, the terminal device can be on the multiple candidate time-frequency positions of BWP1 Monitor DCI.
  • the DCI here can be DCI scrambled by G-RNTI1, G-RNTI2 or C-RNTI or other possible RNTI.
  • the search space and CORESET may be separately configured for multicast transmission.
  • multiple search spaces can be configured on BWP1, and the purpose of multiple search spaces can be indicated during configuration, for example: for paging (pagingSearchSpace), for random access (ra-SearchSpace), and for Receive SIB1 (searchSpaceSIB1).
  • pagingSearchSpace for paging
  • ra-SearchSpace for random access
  • searchSpaceSIB1 Receive SIB1
  • searchSpaceSIB1 Receive SIB1
  • control resource set determines the frequency domain resource for transmitting the DCI, that is, the DCI can be transmitted on the frequency domain resource corresponding to the control resource set, and the frequency domain resource corresponding to the control resource set may include multiple RBs.
  • the search space determines the time domain resources for transmitting DCI.
  • the search space can be configured with some time domain information, such as: period (that is, the time interval for detecting the search space, and the unit can be time slot); time slot offset (that is, the detection period starts to Actually detect the time slot offset between the search spaces, and the time slot offset is less than the value of the detection period; the first duration (configured by the duration parameter, that is, the time for continuously detecting the search space, which can include multiple Time slot, and the number of time slots included is less than the value of the detection period); the time domain start position (that is, the time domain start position corresponding to the control resource set associated with the search space in each time slot).
  • period that is, the time interval for detecting the search space, and the unit can be time slot
  • time slot offset that is, the detection period starts to Actually detect the time slot offset between the search spaces, and the time slot offset is less than the value of the detection period
  • the first duration configured by the duration parameter, that is, the time for continuously detecting the search space, which can include multiple Time slot, and the number of time slots included
  • the period of the search space is 10 slots
  • the slot offset is 3 slots
  • the first duration is 2 slots
  • the start position of the time domain is a symbol in a slot.
  • the second duration of the control resource set associated with the search space is 2 symbols.
  • the terminal device can detect DCI on symbol 0, symbol 1, and symbol 7, and symbol 8 in slot 3 and slot 4 in the detection period of every 10 slots.
  • the physical layer configuration information corresponding to BWP1 may also include physical layer parameters required for receiving PDSCH on BWP1.
  • the physical layer parameters required to receive PDSCH on BWP1 may include the timing relationship between PDCCH and PDSCH; network equipment can configure multiple timing relationships between PDCCH and PDSCH through RRC messages in advance, when using DCI to dynamically schedule resources , You can indicate which timing relationship to use in the DCI, for example, when the indicated value (Value) in the DCI is 0 corresponds to the first timing relationship in the timing relationship table configured by the RRC message, and the indicating value of 1 in the DCI corresponds to the timing relationship table The second timing relationship in, and so on.
  • the configuration of each timing relationship may include at least one of the following: (1) The slot offset K0 between the DCI and the PDSCH scheduled by the DCI (see section 5.1.2.1 in TS 38.214), when this offset When the corresponding field does not exist, the terminal device can default to 0; (2) PDSCH mapping type indication (mappingType), see TS 38.214, section 5.3; (3) Effective combination of start symbol and length (joint coding) The index (startSymbolAndLength) can be used as a start and length indicator (SLIV). The network device configures this field so that resource allocation does not cross the slot boundary (see TS 38.214, section 5.1.2.1).
  • Configuration information 2 can be used to configure one or more dedicated BWPs (such as BWP3 and BWP4) for the terminal device, and further, can also be used to configure one or more dedicated BWP identifiers; where the dedicated BWP identifiers can be used for Information identifying the dedicated BWP, such as the number of the dedicated BWP.
  • dedicated BWPs such as BWP3 and BWP4
  • Table 3 it is an example of the information included in the configuration information 2.
  • Table 3 Examples of information included in configuration information 2
  • configuration information and physical layer configuration information of the dedicated BWP can be referred to the related description of configuration information 1 above, which will not be repeated here.
  • the network device may send configuration information 1 and configuration information 2 through the same message; for example, the network device may send configuration information 1 and configuration information 2 through an RRC message.
  • the network device can also send configuration information 1 and configuration information 2 through different messages; for example, the network device can send configuration information 1 through RRC message 1 and configuration information 2 through RRC message 2; for another example, network equipment can send configuration information through system messages Send configuration information 1, and send configuration information 2 through RRC messages.
  • step 501 can also be replaced with step 501': the network device sends configuration information 1 and configuration information 2 to the terminal device; among them, configuration information 1 is used to configure the correspondence between multicast BWP and G-RNTI
  • configuration information 2 is used to configure multiple BWPs, and can also be used to configure multiple BWP identifiers.
  • the multiple BWPs may include one or more dedicated BWPs and one or more multicast BWPs.
  • multiple BWPs include BWP1, BWP2, BWP3, and BWP4, BWP1 and BWP2 are multicast BWPs, and BWP3 and BWP4 are dedicated BWPs.
  • the configuration information 2 configures four BWPs as an example here. In specific implementation, the configuration information 2 can configure more than four BWPs, and the embodiment of the present application does not limit the specific number.
  • the configuration information 2 may include the identifiers of multiple BWPs, the configuration information of the multiple BWPs, and the physical layer configuration information corresponding to the multiple BWPs, as shown in Table 4.
  • Table 4 Examples of information included in configuration information 2
  • the configuration information 1 may include the identifiers of multiple multicast BWPs and the G-RNTIs respectively corresponding to the multiple multicast BWPs. As shown in Table 5, it is an example of the information included in the configuration information 1.
  • Table 5 Examples of information included in configuration information 1
  • configuration information 1 may include configuration information of multiple multicast services (for example, multicast service 1 and multicast service 2).
  • the configuration information of multicast service 1 may include the identifiers of G-RNTI1 and BWP1 corresponding to G-RNTI1 associated with multicast service 1. As shown in Table 6, it is an example of the information included in the configuration information 1.
  • Table 6 Examples of information included in configuration information 1
  • Multicast service Multicast service configuration information Multicast service 1 G-RNTI1, ID of BWP1, physical layer configuration information corresponding to BWP1 Multicast service 2 G-RNTI2, identification of BWP2, physical layer configuration information corresponding to BWP2
  • step 501' The difference between step 501' described here and step 501 is that in step 501', one or more multicast BWPs can be additionally configured using the method of configuring dedicated BWPs in the prior art, and pass the configuration information 2
  • the identifier of the multicast BWP is used to configure the correspondence between the multicast BWP and the G-RNTI (that is, the configuration information 2 may no longer include the configuration information of the multicast BWP), and the two can refer to each other for other content except this difference.
  • one or more multicast BWPs are configured by following the way in the prior art, which makes minor changes to the prior art, so that this application has strong applicability.
  • the configuration information 2 includes less information, the resource overhead of the configuration information 2 can be effectively saved.
  • Step 502 The terminal device activates the second BWP and communicates with the network device on the second BWP.
  • the second BWP may be an initial BWP or a dedicated BWP.
  • the second BWP may be the BWP that the network device instructs the terminal device to activate through the RRC message, or it may be the BWP that the network device instructs the terminal device to activate through the DCI (the DCI is scrambled by C-RNTI), or , Is the BWP activated by other methods, and the specific is not limited.
  • the second BWP may be one of multiple multicast BWPs, for example, the second BWP may be BWP1 or BWP2.
  • Step 503 After determining that the network device needs to send the multicast transmission of the first service, it sends first information to the terminal device.
  • the first information is used to indicate the first BWP, and the first BWP is used for the multicast transmission of the first service; accordingly, , The terminal device receives the first information.
  • the first information is used to indicate the first BWP, and may include: the first information is used to instruct the terminal device to switch to the first BWP; Broadcast transmission.
  • the first BWP may be one of multiple multicast BWPs, for example, the first BWP is BWP1 or BWP2.
  • the first information may be DCI-1. If the terminal device detects DCI-1 through G-RNTI1, it means that DCI-1 uses G-RNTI1 to scramble, and the terminal device can learn that it needs to switch to BWP1 to receive multicast transmission of multicast service 1 according to the above configuration information 1. If the terminal device detects DCI-1 through G-RNTI2, it means that DCI-1 uses G-RNTI2 for scrambling, and then the terminal device can determine that it needs to switch to BWP2 to receive multicast transmission of multicast service 2 according to the above configuration information 1.
  • Step 504 The terminal device switches the activated BWP from the second BWP to the first BWP according to the first information.
  • the terminal device switches the activated BWP from the second BWP to the first BWP. It can be understood that the terminal device deactivates the currently activated BWP (that is, the second BWP) and activates the first BWP; or, it can also be understood Therefore, the terminal device switches from working on the second BWP to working on the first BWP.
  • Step 505 The network device sends the multicast transmission of the first service to the terminal device in the first BWP (that is, sends the data of the first service to the terminal device in a multicast manner), and accordingly, the terminal device receives the first service on the first BWP. Multicast transmission of services.
  • the terminal device can determine whether the currently activated BWP (that is, the second BWP) matches the first BWP, and if it matches (for example, the second BWP and the first BWP are the same BWP), the terminal device can receive on the second BWP Multicast transmission of the first service; if there is no match (for example, the second BWP and the first BWP are different BWPs), the terminal device can switch the activated BWP from the second BWP to the first BWP according to the first information, and then switch the activated BWP from the second BWP to the first BWP according to the first information.
  • a multicast transmission of the first service is received on a BWP.
  • the terminal device may also send feedback information of the multicast transmission to the network device on the first BWP.
  • the feedback information is used to indicate the status of the first service. Whether the data transmission is successful, so that the network device can determine the data transmission situation according to the feedback information.
  • the feedback information may be hybrid automatic repeat request (HARQ) feedback information, such as HARQ acknowledgement (acknowledgement, ACK) or negative acknowledgement (NACK).
  • HARQ hybrid automatic repeat request
  • ACK HARQ acknowledgement
  • NACK negative acknowledgement
  • the network device can instruct the terminal device to switch to the multicast BWP through an implicit indication method, one On the one hand, it can enable the terminal device to switch to the multicast BWP to receive the multicast transmission in a timely and effective manner.
  • adopting an implicit indication method can effectively save transmission resources.
  • the network device when it determines that it needs to send the multicast transmission of the first service, it can send DCI (referred to as DCI-2 for ease of description) to multiple terminal devices; DCI-2 can be associated with the first service
  • the first G-RNTI is scrambled, or it may be scrambled by C-RNTI; DCI-2 includes the configuration information of the first BWP, or the PDSCH scheduled by DCI-2 includes the configuration information of the first BWP;
  • the first service is a multicast service, and multiple terminal devices refer to terminal devices that are interested in the first service.
  • the DCI-2 or the PDSCH scheduled by the DCI-2 can obtain the configuration information of the first BWP, and then switch to the first BWP to receive the multicast transmission of the first service.
  • a possible implementation process will be described by taking the interaction between a network device and a certain terminal device interested in the first service as an example.
  • FIG. 7 is a schematic diagram of the process corresponding to the communication method provided in the second embodiment of the application, as shown in FIG. 7, including:
  • Step 701 The network device sends configuration information to the terminal device.
  • the configuration information can be used to configure one or more dedicated BWPs for the terminal device; accordingly, the terminal device can receive the configuration information.
  • the configuration information can also be used to configure one or more dedicated BWP identifiers.
  • the configuration information 2 in the first embodiment please refer to the description of the configuration information 2 in the first embodiment, which will not be repeated.
  • Step 702 The terminal device activates the second BWP and communicates with the network device on the second BWP.
  • the second BWP may be an initial BWP, a dedicated BWP, or a multicast BWP.
  • Step 703 The network device sends first information to the terminal device, where the first information is used to indicate that the multicast transmission of the first service is received at the first BWP; accordingly, the terminal device receives the first information.
  • the first information may include configuration information of the first BWP; further, the first information may also include physical layer configuration information corresponding to the first BWP.
  • the first information may be carried in DCI-2, and DCI-2 may be scrambled by C-RNTI or G-RNTI associated with the first service.
  • the terminal device after detecting DCI-2 according to the C-RNTI or the G-RNTI associated with the first service, the terminal device can obtain the first information from the DCI-2.
  • the first information may be carried in a PDSCH scheduled by DCI-2, and DCI-2 may be scrambled by C-RNTI or G-RNTI associated with the first service.
  • the terminal device can receive the PDSCH according to the scheduling information in the DCI-2, and then obtain the first information from the PDSCH.
  • the information transmitted in the PDSCH may include information transmitted to the physical layer via the PDCP layer, the RLC layer, and the MAC layer. Therefore, the first information may be carried on the MAC layer.
  • control message or the control message of the RLC layer or the control message of the PDCP layer may include MAC CE
  • the control message of the RLC layer may be an RLC control PDU
  • the control message of the PDCP layer may be a PDCP control PDU.
  • Step 704 The terminal device switches the activated BWP from the second BWP to the first BWP according to the first information.
  • Step 705 The network device sends the multicast transmission of the first service to the terminal device on the first BWP, and accordingly, the terminal device receives the multicast transmission of the first service on the first BWP.
  • the terminal device can determine whether the currently activated BWP (that is, the second BWP) matches the first BWP, and if it matches (for example, the second BWP and the first BWP are the same BWP), the terminal device can receive on the second BWP Multicast transmission of the first service; if there is no match (for example, the second BWP and the first BWP are different BWPs), the terminal device can switch the activated BWP from the second BWP to the first BWP according to the first information, and then switch the activated BWP from the second BWP to the first BWP according to the first information.
  • a multicast transmission of the first service is received on a BWP.
  • the network device does not need to configure the multicast BWP for the terminal device in advance, but can send the multicast BWP configuration to the terminal device through the DCI or the PDSCH scheduled by the DCI when the terminal device is required to switch to the multicast BWP.
  • Information so that the terminal device can switch to the multicast BWP according to the configuration information of the multicast BWP, and receive the multicast transmission of the service on the multicast BWP.
  • the terminal device is switched to the multicast BWP, and on the other hand, the first BWP is indicated in an explicit way, without the need to set the multicast BWP and the G-RNTI associated with the multicast service.
  • the corresponding relationship increases the flexibility of network equipment regulation.
  • the network device when it determines that it needs to send the multicast transmission of the first service, it can send DCI (referred to as DCI-3 for ease of description) to multiple terminal devices; DCI-3 can be associated with the first service
  • the first G-RNTI is scrambled, or can also be scrambled by C-RNTI; DCI-3 includes the identity of the first BWP or the identity of the group to which the first BWP belongs and the identity of the first BWP in the group, or
  • the PDSCH scheduled by DCI-3 includes the identity of the first BWP or the identity of the group to which the first BWP belongs and the identity of the first BWP in the group; where the first service is a multicast service, and multiple terminal devices refer to Terminal equipment interested in the first business.
  • the terminal devices can obtain the identity of the first BWP or the identity of the group to which the first BWP belongs and the identity of the first BWP in the group, and then Switch to the first BWP to receive the multicast transmission of the first service.
  • a possible implementation process will be described by taking the interaction between a network device and a certain terminal device interested in the first service as an example.
  • FIG. 8 is a schematic diagram of the process corresponding to the communication method provided in the third embodiment of the application, as shown in FIG. 8, including:
  • Step 801 The network device sends configuration information to the terminal device.
  • the configuration information may be used to configure at least one BWP.
  • the at least one BWP includes BWP1, BWP2, BWP3, and BWP4.
  • At least one BWP may include multicast BWP, for example, BWP1, BWP2, BWP3, and BWP4 may all be multicast BWP; or, at least one BWP may include multicast BWP and dedicated BWP, for example, BWP1, BWP2 are multicast BWP, BWP3 and BWP4 are dedicated BWPs.
  • the network device may send an RRC message to the terminal device, and the RRC message includes configuration information; in this case, at least one BWP may include a multicast BWP, or at least one BWP may include a multicast BWP and a dedicated BWP.
  • the network device may send a system message to the terminal device, and the system message includes configuration information; in this case, at least one BWP may include a multicast BWP.
  • the configuration information may also be used to configure the identifier of at least one BWP, that is, the configuration information may also be used to configure the identifier of each BWP in BWP1, BWP2, BWP3, and BWP4.
  • the configuration information may also be used to configure the identity of the group to which the at least one BWP belongs and the identity of the at least one BWP in the group to which the at least one BWP belongs.
  • the at least one BWP may be grouped according to the type to which the at least one BWP belongs, and the identifier of the group to which the at least one BWP belongs may be the identifier of the type to which the at least one BWP belongs.
  • the type to which at least one BWP belongs may include dedicated BWP and multicast BWP.
  • the group to which BWP1 and BWP2 belong is the identifier of multicast BWP
  • the identifier of BWP1 in the group is number 1
  • BWP2 is in the group.
  • the identifier is number 2
  • the identifier of the group to which BWP3 and BWP4 belong is the identifier of the dedicated BWP
  • the identifier of BWP3 in this group is number 1
  • the identifier of BWP4 in this group is number 2.
  • the type to which the at least one BWP belongs may include the BWP corresponding to the URLLC service and the BWP corresponding to the multicast service; or, the type to which the at least one BWP belongs may also include other possible types, which are not specifically limited.
  • Step 802 The terminal device activates the second BWP and communicates with the network device on the second BWP.
  • the second BWP may be an initial BWP, a dedicated BWP, or a multicast BWP.
  • Step 803 The network device sends first information to the terminal device, where the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; accordingly, the terminal device receives the first information.
  • the first information may include the identity of the first BWP, or the first information includes the identity of the group to which the first BWP belongs and the identity of the first BWP in the group.
  • the first information may be carried in DCI-3, and DCI-3 may be scrambled by C-RNTI or G-RNTI associated with the first service.
  • the terminal device after detecting DCI-3 according to the C-RNTI or the G-RNTI associated with the first service, the terminal device can obtain the first information from the DCI-3.
  • the first information may be carried in a PDSCH scheduled by DCI-3, and DCI-3 may be scrambled by C-RNTI or G-RNTI associated with the first service.
  • the terminal device can receive the PDSCH according to the scheduling information in the DCI-3, and then obtain the first information from the PDSCH.
  • the first information may be carried in a control message of the MAC layer or a control message of the RLC layer or a control message of the PDCP layer.
  • Step 804 The terminal device switches the activated BWP from the second BWP to the first BWP according to the first information.
  • Step 805 The network device sends the multicast transmission of the first service to the terminal device in the first BWP (that is, sends the data of the first service to the terminal device in a multicast manner), and accordingly, the terminal device receives the first service on the first BWP. Multicast transmission of services.
  • the terminal device can determine whether the currently activated BWP (that is, the second BWP) matches the first BWP, and if it matches (for example, the second BWP and the first BWP are the same BWP), the terminal device can receive on the second BWP Multicast transmission of the first service; if there is no match (for example, the second BWP and the first BWP are different BWPs), the terminal device can switch the activated BWP from the second BWP to the first BWP according to the first information, and then switch the activated BWP from the second BWP to the first BWP according to the first information.
  • a multicast transmission of the first service is received on a BWP.
  • the network device can pre-configure the multicast BWP and the multicast BWP identifier (or the identifier of the group to which the multicast BWP belongs and the identifier of the multicast BWP in the group) for the terminal device, and then need
  • a terminal device switches to a multicast BWP, it sends the identifier of the multicast BWP to the terminal device through the PDSCH scheduled by DCI or DCI, so that the terminal device can switch to the multicast BWP according to the identifier of the multicast BWP, and receive service information on the multicast BWP.
  • Multicast transmission
  • the terminal device is switched to the multicast BWP, and on the other hand, the first BWP is indicated in an explicit way, without the need to set the multicast BWP and the G-RNTI associated with the multicast service.
  • the corresponding relationship increases the flexibility of network equipment regulation; and, because the multicast BWP identifier usually only occupies a small amount of transmission resources, it can effectively save transmission resources.
  • the terminal device can receive the first information from the network device, and switch the second BWP to the first according to the first information. BWP.
  • the terminal device may perform higher priority operations on the second BWP when receiving the first information, in this case, switching the second BWP to the first BWP may result in higher priority operations An interruption occurred.
  • the embodiment of the present application also provides a communication method.
  • this communication method when the terminal device receives the switching information, it can determine whether the preset condition is met, and if it does not, it can perform the BWP switching operation according to the switching information. ; If it does, the switching information can be ignored, that is, the BWP switching operation is not performed; among them, the preset conditions can be set according to actual needs.
  • this method may be applicable to multiple possible BWP handover scenarios.
  • the method can be applied to the scenario where the terminal device switches between the initial BWP and the dedicated BWP, or it can also be applied to the scenario where the terminal device switches between the multicast BWP, or alternatively, it can also be applied to the dedicated BWP (or The scenario of switching between the initial BWP) and the multicast BWP.
  • a scenario where the method is applied to a terminal device switching from an initial BWP, a dedicated BWP, or a multicast BWP to a multicast BWP is taken as an example to describe a possible implementation.
  • Fig. 9 is a schematic diagram of a process corresponding to the communication method provided in the fourth embodiment of the application, as shown in Fig. 9, including:
  • Step 901 The network device sends switching information to the terminal device, and accordingly, the terminal device can receive the switching information.
  • the switching information may be the first information in Embodiment 1 to Embodiment 3, and is used to instruct the terminal device to switch the second BWP to the first BWP.
  • step 902 the terminal device determines whether the preset condition is met. If the preset condition is met, step 903a and step 904a are executed; if the preset condition is not met, step 903b and step 904b are executed.
  • the terminal device judging whether the preset condition is met may mean that the terminal device judging whether it meets at least one of the following: (1) When receiving the first information, it is receiving the order of the second service on the second BWP. The priority of the first service is lower than or equal to the priority of the second service; or, the priority of the multicast transmission is lower than or equal to the priority of the unicast transmission.
  • the second BWP may be a dedicated BWP, and the second service may be a unicast service or a multicast service.
  • the multicast transmission of the third service is being received on the second BWP, and the priority of the first service is lower than or equal to the priority of the third service.
  • the second BWP may be a multicast BWP
  • the third service may be a multicast service.
  • the second BWP can be a dedicated BWP or an initial BWP.
  • the terminal device determines that it meets at least one of (1)(2)(3), it means it meets the preset conditions; if it determines that it does not meet (1)(2)(3), it means it does not meet the preset conditions.
  • the priority of each service may be pre-configured by the network device to the terminal device, or may also be agreed upon by the protocol.
  • the priority of unicast transmission and the priority of multicast transmission may be pre-configured by the network device to the terminal device, or may also be agreed upon by the protocol.
  • Step 903a The terminal device ignores the switching information, that is, does not perform BWP switching according to the first information.
  • the terminal device ignoring the first information can be understood as the terminal device ignoring DCI-1; in the second embodiment, If the terminal device ignores the first information, it can be understood that the terminal device ignores DCI-2 (the first information is carried in DCI-2), or the terminal device ignores DCI-2 and the PDSCH scheduled by DCI-2 (the first information is carried in the PDSCH)
  • the terminal device ignores the first information can be understood as the terminal device ignores DCI-3 (the first information is carried in DCI-3), or the terminal device ignores DCI-3 and the PDSCH scheduled by DCI-3 (the first A piece of information is carried in the PDSCH).
  • Step 904a After determining that the terminal device ignores the switching information, the network device can send the unicast transmission of the first service to the terminal device (that is, send the data of the first service to the terminal device in a unicast manner); accordingly, the terminal device can receive the first service. Unicast transmission of a service.
  • the network device may send notification information to the network device, and the network device can determine that the terminal device has ignored the first information according to the notification information.
  • the notification information may be carried in the control message of the MAC layer, and the control message of the MAC layer may include the MAC subPDU.
  • the MAC subPDU can include a MAC subheader and a MAC CE.
  • the MAC subheader includes a logical channel ID (LCID) field.
  • the LCID field can be used to indicate the LCID.
  • a special LCID (such as LCID) can be introduced.
  • the MAC CE corresponding to the MAC subheader may be empty (that is, the length of the field is 0).
  • the network device may send the unicast transmission of the first service to the terminal device on the second BWP; or, also The terminal device can be instructed to switch to another dedicated BWP, and then send the unicast transmission of the first service to the terminal device on the other dedicated BWP, which is not specifically limited.
  • Step 903b The terminal device switches the activated BWP from the second BWP to the first BWP according to the first information.
  • Step 904b The network device sends the multicast transmission of the first service to the terminal device on the first BWP, and correspondingly, the terminal device receives the multicast transmission of the first service on the first BWP.
  • the terminal device can determine whether the currently activated BWP (that is, the second BWP) matches the first BWP, and if it matches (for example, the second BWP and the first BWP are the same BWP), the terminal device can receive on the second BWP Multicast transmission of the first service; if there is no match (for example, the second BWP and the first BWP are different BWPs), the terminal device can switch the activated BWP from the second BWP to the first BWP according to the first information, and then switch the activated BWP from the second BWP to the first BWP according to the first information.
  • a multicast transmission of the first service is received on a BWP.
  • the terminal device when the terminal device receives the switching information, it can first determine whether to perform a higher priority operation on the currently activated BWP. If it is, it can temporarily not perform the BWP switching operation, otherwise, it can perform the BWP switching operation. This can effectively avoid interruption of higher priority operations.
  • the terminal device After the terminal device finishes receiving the multicast service on the multicast BWP, if it still stays on the multicast BWP, there may be some problems. For example, from the perspective of service requirements, since multicast services are not often available, when it is necessary to receive multicast services, the terminal device can switch to the multicast BWP to receive the multicast services; but when the multicast services are transmitted, if The terminal device still stays on the multicast BWP (for example, using the SCS corresponding to the multicast BWP, bandwidth, etc.), which may not be able to meet the requirements of other services, thereby affecting the reception of other services.
  • the terminal device can switch to the multicast BWP to receive the multicast services; but when the multicast services are transmitted, if The terminal device still stays on the multicast BWP (for example, using the SCS corresponding to the multicast BWP, bandwidth, etc.), which may not be able to meet the requirements of other services, thereby affecting the reception of other services.
  • multicast services such as live video
  • the required width of the multicast BWP is relatively large.
  • live video When the live video is over, normal The service does not need such a large width, and if the terminal device still stays on the multicast BWP with a large width, the power consumption of the terminal device may be large.
  • the embodiment of the present application also provides a communication method.
  • the communication method after the terminal device switches to the multicast BWP, it can fall back from the multicast BWP to a suitable BWP to solve the above-mentioned problem.
  • the terminal device may switch to the multicast BWP in the manner described in the foregoing Embodiment 1 to Embodiment 3, or may also switch to the multicast BWP in other possible manners.
  • the terminal device will switch to the multicast BWP using the methods described in the previous embodiment 1 to the third embodiment as an example, and the implementation mode 1 and the realization mode 2 will be combined to describe the terminal device falling back from the multicast BWP to other suitable methods. Possible realization of BWP.
  • the terminal device may decide to switch the activated BWP from the first BWP to the third BWP.
  • the third BWP may be pre-defined by the protocol, or pre-appointed by the network device and the terminal device, or pre-instructed by the network device; for example, the third BWP is the default BWP or the second BWP. In this way, the terminal device decides to switch the activated BWP from the first BWP to the third BWP, which can effectively save the signaling overhead between the terminal device and the network device, and enable the terminal device to fall back to the appropriate one in time On the BWP.
  • the terminal device determines that the multicast transmission of the first service is not received on the first BWP within the first time period, and DCI-4 is not detected, it can send the activated BWP to the first BWP.
  • the BWP is switched to the third BWP.
  • DCI-4 is used to schedule the multicast transmission of the first service, and DCI-4 can be scrambled by the G-RNTI associated with the first service.
  • the terminal device can start the timer at the first moment, and within the preset time period starting from the first moment, if the multicast transmission of the first service is not received on the first BWP, and it is not detected
  • DCI-4 is reached, at the end of the preset time period, it is determined that the timer expires, and the activated BWP is switched from the first BWP to the third BWP.
  • the preset time period if the multicast transmission of the first service is performed on the first BWP and/or DCI-4 is detected, the timer is restarted.
  • the duration of the timer is equal to the duration of the preset time period and equal to the first duration.
  • the above-mentioned first moment may be the moment when the first information is received, or it may be the moment when the activated BWP is switched to the first BWP, or it may also be the subframe or time slot or mini-slot or mini-slot for receiving multicast transmission.
  • the end boundary of the symbol or frame, or other possible moments, may depend on the internal implementation of the terminal device.
  • the foregoing first duration may be indicated by the network device.
  • the terminal device receives indication information from the network device, and the indication information is used to indicate the first duration; where the indication information may be carried in system messages or RRC layer messages or DCI, and DCI may Scrambling through the G-RNTI of the first service.
  • the first duration may also be predefined by the agreement.
  • the terminal device may switch the activated BWP from the first BWP to the third BWP.
  • the value of M may be indicated by the network device, or may also be predefined by the protocol.
  • the terminal device may start a timer at the second moment, and after the timer expires, switch the activated BWP from the first BWP to the third BWP.
  • the second moment may be the moment when the first information is received, or it may be the moment when the activated BWP is switched to the first BWP, or it may be the subframe or time slot or mini-slot for receiving multicast transmission. Either the symbol or the end boundary of the frame, or other possible moments, depending on the internal implementation of the terminal device.
  • the duration of the timer may be the second duration, and the second duration may be indicated by the network device, or may also be predefined by the protocol.
  • the terminal device after the terminal device switches the activated BWP from the first BWP to the third BWP, it can also send a switch confirmation instruction to the network device on the third BWP to indicate that the terminal device has returned to the second BWP. Three BWP.
  • the network device after the network device receives the handover confirmation instruction from the third BWP, it can learn that the terminal device has rolled back to the third BWP, thereby ensuring that the terminal device and the network device have the same understanding of the working BWP of the terminal device.
  • the terminal device can send a request message to the network device, the request message is used to request to perform BWP handover; accordingly, after the network device receives the request message, it can send a response message to the terminal device, and the terminal device can be based on the network The device's response message switches the activated BWP from the first BWP to the third BWP.
  • the terminal device determines that DCI-3 is not detected at the consecutive M candidate time-frequency positions corresponding to DCI-3, it sends a request message to the network device.
  • the terminal device switches the BWP according to the response message of the network device, which can effectively improve the flexibility of network device regulation.
  • the network device and the terminal device may pre-appoint the backed BWP, or may also predefine the backed BWP, such as the third BWP, by the protocol.
  • the request message is used to request to perform BWP switching, which may mean: the request message is used to request to switch the first BWP to the third BWP, or the request message is used to request fallback to the third BWP.
  • the network device can determine whether to allow the terminal device to switch to the third BWP, and send a response message to the terminal device according to the determination result.
  • the response message can include 1 bit of indication information.
  • this bit If the value of this bit is 1, it means that the terminal device is allowed to switch to the third BWP, and if the value of this bit is 0, it means that the terminal device is not allowed. Switch to the third BWP. For example, if the response message includes the identifier of the third BWP, it indicates that the terminal device is allowed to switch to the third BWP, and if the response message does not include the identifier of the third BWP, it indicates that the terminal device is not allowed to switch to the third BWP. In other possible examples, if the network device determines that the terminal device is not allowed to switch to the third BWP, it may no longer send a response message.
  • the terminal device if it does not receive the response message, it can learn that the network device does not allow the terminal The device switches to the third BWP.
  • the network device may be multiple basis for the network device to determine whether to allow the terminal device to switch to the third BWP, which is not limited in the embodiment of the present application.
  • the request message may be a MAC layer control message or an RLC layer control message or a PDCP layer control message or an RRC layer message (ie, an RRC message).
  • the MAC layer control message may include a MAC subPDU (subPDU).
  • the MAC subPDU can include a MAC subheader and a MAC control element (CE).
  • the MAC subheader includes an LCID field.
  • the LCID field can be used to indicate the LCID.
  • a special LCID such as LCID-2.
  • the MAC CE corresponding to the MAC subheader may be empty (that is, the length of the field is 0).
  • the control message of the RLC layer or the control message of the PDCP layer may be a control PDU.
  • the PDU may include a D/C field, a PDU type (type) field, and a reserved field.
  • the D/C field is used to indicate that the PDU is a control PDU
  • the PDU type field is used to indicate the type of the PDU.
  • a special PDU type can be introduced. When the PDU type field indicates the type of the special PDU When type, it indicates that the PDU is used to request to perform BWP handover.
  • the request message may include an identifier of a candidate BWP (for example, the candidate BWP is the third BWP).
  • the request message for requesting to perform BWP switching may mean that the request message is used for requesting to switch the first BWP to the third BWP.
  • the network device can determine whether to allow the terminal device to switch to the third BWP, and send a response message to the terminal device according to the determination result.
  • the difference between Case 2 and Case 1 is that the request message includes an identifier of a candidate BWP, and other content except for this difference, the two can refer to each other.
  • the request message may include the identifiers of multiple candidate BWPs.
  • the request message for requesting to perform BWP switching may mean that the request message is used for requesting to switch the first BWP to one of the multiple candidate BWPs.
  • the network device can select the third BWP from the multiple candidate BWPs and send a response message to the terminal device.
  • the response message includes the identity of the third BWP, and the terminal device can switch to The third BWP.
  • the response message does not include any candidate BWP identifiers or the terminal device does not receive the response message, it indicates that the terminal device is not allowed to perform BWP switching.
  • there may be multiple basis for the network device to select the third BWP from the multiple candidate BWPs which is not limited in the embodiment of the present application.
  • the request message may be a MAC layer control message or an RLC layer control message or a PDCP layer control message or an RRC layer message.
  • the MAC layer control message may include MAC subPDU.
  • the MAC subPDU can include a MAC subheader and a MAC CE.
  • the MAC subheader includes an LCID field.
  • the LCID field can be used to indicate the LCID.
  • a special LCID (such as LCID-2) can be introduced.
  • the LCID field indicates the special LCID, it indicates that the MAC layer control message is used to request the execution of BWP handover.
  • the MAC CE corresponding to the MAC subheader may include one or more candidate BWP identifiers.
  • the control message of the RLC layer or the control message of the PDCP layer may be a control PDU.
  • the control PDU may include a D/C field, a PDU type field, and a reserved field.
  • the D/C field is used to indicate that the PDU is a control PDU
  • the PDU type field is used to indicate the type of the PDU.
  • a special PDU type can be introduced.
  • the PDU type field indicates the type of the special PDU When type, it indicates that the PDU is used to request to perform BWP handover.
  • the reserved field may include the identification of one or more candidate BWPs.
  • the terminal device after the terminal device switches the activated BWP from the first BWP to the third BWP based on the response message of the network device, it can also send a switch confirmation instruction to the network device on the third BWP to instruct the terminal The device has fallen back to the third BWP; accordingly, after the network device receives the handover confirmation instruction from the third BWP, it can learn that the terminal device has completed the BWP switch, so as to ensure that the terminal device and the network device’s work BWP for the terminal device The understanding is consistent.
  • the terminal device may select a BWP from multiple candidate BWPs (for example, select the BWP as the third BWP), and switch the activated BWP from the first BWP to the third BWP.
  • the multiple candidate BWPs may be pre-configured by the network device, and the multiple candidate BWPs may include dedicated BWP and/or multicast BWP of the terminal device. In this way, the terminal device selects a BWP and switches to the BWP, so that the implementation of the terminal device is more flexible, and it is convenient for the terminal device to fall back to a suitable BWP.
  • the terminal device may select the BWP according to the service requirements for subsequent transmission, and the service requirements may include the amount of service data and/or the requirements for service delay. For example, if the amount of service data is large, the terminal device can select a BWP with a larger width from multiple candidate BWPs; if the traffic data is small, the terminal device can select a BWP with a smaller width from the multiple candidate BWPs. For another example, if the service requires high delay, the terminal device can select a BWP corresponding to a smaller subcarrier interval from multiple candidate BWPs. Understandably, when two or more BWPs among multiple candidate BWPs meet the conditions (for example, there are two or more BWPs with a larger width), the specific choice of which BWP may depend on the internal implementation of the terminal device .
  • the terminal device may select the BWP according to the measured quality of the reference signal on the multiple candidate BWPs. For example, a BWP with a reference signal quality higher than or equal to a preset threshold can be selected from multiple candidate BWPs. When there are two or more BWPs with a reference signal quality higher than or equal to the preset threshold, which one is specifically selected
  • the BWP may depend on the internal implementation of the terminal device. Wherein, the quality of the reference signal may be RSRP and/or RSRQ.
  • the preset threshold may be pre-configured by the network device or pre-defined by the protocol.
  • Implementation Mode 3 after the terminal device switches the activated BWP from the first BWP to the third BWP, it can also send a switch confirmation instruction to the network device on the third BWP to indicate that the terminal device has returned to the second BWP.
  • Three BWP accordingly, after the network device receives the handover confirmation instruction from the third BWP, it can learn that the BWP selected by the terminal device from the multiple candidate BWPs is the third BWP and the terminal device has fallen back to the third BWP, thus It can be ensured that the terminal equipment and the network equipment have the same understanding of the working BWP of the terminal equipment.
  • the handover confirmation indication may be a MAC layer control message
  • the MAC layer control message may include MAC subPDU.
  • a special LCID (such as LCID-3) may be introduced.
  • the LCID field of the MAC subPDU indicates LCID- At 3 o'clock, it indicates that the control message of the MAC layer is a handover confirmation instruction.
  • the MAC CE of the MAC subPDU may be empty.
  • the terminal device When the terminal device determines that there are available uplink resources on the third BWP, it may send the MAC layer control message through the available uplink resources.
  • the handover confirmation indication can correspond to one or more specific random access preambles (such as preamble 1), that is, preamble 1 can indicate that the terminal device has returned to the third BWP. Therefore, the terminal device is in Sending the handover confirmation instruction on the third BWP may mean that the terminal device sends the preamble 1 on the third BWP.
  • the correspondence between the handover confirmation indication and the specific random access preamble may be configured by the network device for the terminal device, or may also be predefined by the protocol.
  • Embodiment 1 to Embodiment 5 can be implemented separately or in combination.
  • Embodiment 1, Embodiment 2 or Embodiment 3 can be implemented in combination with Embodiment 4; for another example, Embodiment 1, Embodiment 2 or Embodiment 3 can be implemented in combination with Embodiment 5; for example, Embodiment 4 and
  • the fifth embodiment can be implemented in combination; for another example, the first embodiment, the second embodiment, or the third embodiment can be implemented in combination with the fourth embodiment and the fifth embodiment.
  • step numbers of the flowcharts described in Embodiment 1 to Embodiment 4 are only an example of the execution process, and do not constitute a restriction on the order of execution of the steps. There is no time sequence dependency among the embodiments of this application. There is no strict order of execution between the steps of the relationship. In addition, not all the steps shown in each flowchart are necessary steps, and some steps can be added or deleted on the basis of each flowchart according to actual needs.
  • the network device or the terminal device may include a hardware structure and/or software module corresponding to each function.
  • the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application may divide the terminal device and the network device into functional units according to the foregoing method examples.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • FIG. 11 shows a possible exemplary block diagram of a device involved in an embodiment of the present application.
  • the apparatus 1100 may include: a processing unit 1102 and a communication unit 1103.
  • the processing unit 1102 is used to control and manage the actions of the device 1100.
  • the communication unit 1103 is used to support communication between the apparatus 1100 and other devices.
  • the communication unit 1103 is also called a transceiving unit, and may include a receiving unit and/or a sending unit, which are used to perform receiving and sending operations, respectively.
  • the apparatus 1100 may further include a storage unit 1101 for storing program codes and/or data of the apparatus 1100.
  • the apparatus 1100 may be the terminal device in any of the foregoing embodiments, or may also be a chip provided in the terminal device.
  • the processing unit 1102 may support the apparatus 1100 to execute the actions of the terminal device in the foregoing method examples. Alternatively, the processing unit 1102 mainly executes the internal actions of the terminal device in the method example, and the communication unit 1103 may support communication between the apparatus 1100 and the network device.
  • the communication unit 1103 is configured to receive first information from a network device, where the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; the processing unit 1102 uses Therefore, the second BWP is switched to the first BWP according to the first information; the communication unit 1103 is further configured to receive the multicast transmission of the first service on the first BWP.
  • the first information is the first DCI
  • the first DCI is scrambled by a group wireless G-RNTI associated with the first service
  • the BWP corresponding to the G-RNTI is the first BWP.
  • the communication unit 1103 is further configured to receive second information from the network device, where the second information is used to configure the correspondence between the G-RNTI and the first BWP.
  • the first information includes configuration information of the first BWP; wherein, the configuration information of the first BWP includes frequency domain start position information of the first BWP, and the first BWP is in the frequency domain.
  • the configuration information of the first BWP includes the parameter resource indicator value RIV corresponding to the first BWP, and the RIV is used to indicate the frequency domain offset position information of the first BWP and the frequency domain offset position information of the first BWP
  • the occupied bandwidth information and the frequency domain offset position information of the first BWP are used to determine the frequency domain start position information of the first BWP.
  • the first information includes the identifier of the first BWP; the communication unit 1103 is further configured to receive third information from the network device; wherein, the third information is used to configure at least An identifier of one BWP and the at least one BWP, and the at least one BWP includes the first BWP.
  • the first information includes the identity of the group to which the first BWP belongs and the identity of the first BWP in the group; the communication unit 1103 is further configured to receive the first information from the network device Four information; wherein, the fourth information is used to configure at least one BWP, the identity of the group to which the at least one BWP belongs, the identity of the at least one BWP in the group to which the at least one BWP belongs, and the at least one The BWP includes the first BWP.
  • the first information is carried in the second DCI, and the second DCI is scrambled by the G-RNTI associated with the first service; or, the first information is carried in the MAC layer control message or RLC layer control messages or PDCP layer control messages.
  • the processing unit 1102 is specifically configured to switch the second BWP to the first BWP according to the first information when it is determined that the following items 1 to 3 are not met: Item, when the first information is received, the unicast transmission of the second service is being received on the second BWP; wherein the priority of the first service is lower than or equal to the priority of the second service; or, the multicast transmission The priority of is lower than or equal to the priority of unicast transmission; the second item, when the first information is received, the multicast transmission of the third service is being received on the second BWP, and the priority of the first service is lower than or equal to The priority of the third service; the third item, when the first information is received, the random access procedure is being performed on the second BWP.
  • the communication unit 1103 is further configured to send a request message to the network device, where the request message is used to request to perform BWP handover; and, to receive a response message from the network device, according to all The response message switches the first BWP to the third BWP.
  • the request message includes the identification of at least one candidate BWP; the request message is used to request to perform BWP switching, and includes: the request message is used to request to switch the first BWP to all One of the at least one candidate BWP; the response message includes an identifier of a third BWP, and the third BWP is determined according to the at least one candidate BWP.
  • the communication unit 1103 is specifically configured to determine that the multicast transmission of the first service is not received on the first BWP within the first time period, and the third DCI is not detected , Send a request message to the network device; or, if the third DCI is not detected at the consecutive M candidate time-frequency positions corresponding to the third DCI, send a request message to the network device; M is a positive integer; where, The third DCI is used to schedule the multicast transmission of the first service.
  • the processing unit 1102 is specifically configured to determine that the multicast transmission of the first service is not received on the first BWP within the first time period, and the third DCI is not detected , The first BWP is switched to the third BWP; or, if the third DCI is not detected at the consecutive M candidate time-frequency positions corresponding to the third DCI, the first BWP is switched to the third BWP; M is A positive integer; where the third DCI is used to schedule the multicast transmission of the first service.
  • the apparatus 1100 may be a network device (such as a first network device or a second network device) in any of the above embodiments, or may also be a chip set in the network device.
  • the processing unit 1102 may support the apparatus 1100 to execute the actions of the network device in the above method examples.
  • the processing unit 1102 mainly executes the internal actions of the network device in the method example, and the communication unit 1103 may support communication between the apparatus 1100 and other devices.
  • the communication unit 1103 is configured to send first information to the terminal device, where the first information is used to indicate that the multicast transmission of the first service is received on the first BWP; and, on the first BWP Send the multicast transmission of the first service.
  • the first information is the first DCI, which is scrambled by the G-RNTI associated with the first service; and the BWP corresponding to the G-RNTI is the first BWP.
  • the communication unit 1103 is further configured to send second information to the terminal device, and the second information is used to configure the correspondence between the G-RNTI and the first BWP.
  • the first information includes configuration information of the first BWP; wherein, the configuration information of the first BWP includes frequency domain start position information of the first BWP, and the first BWP is in the frequency domain.
  • the configuration information of the first BWP includes the parameter resource indicator value RIV corresponding to the first BWP, and the RIV is used to indicate the frequency domain offset position information of the first BWP and the frequency domain offset position information of the first BWP Occupied bandwidth information, and the frequency domain offset position information is used to determine the frequency domain start position information.
  • the first information includes the identifier of the first BWP; the communication unit 1103 is further configured to send third information to the terminal device; wherein, the third information is used to configure at least one BWP An identifier of the BWP and the at least one BWP, and the at least one BWP includes the first BWP.
  • the first information includes the identity of the group to which the first BWP belongs and the identity of the first BWP in the group; the communication unit 1103 is further configured to send the fourth information to the terminal device. Information; wherein the fourth information is used to configure the at least one BWP, the identity of the group to which the at least one BWP belongs, the identity of the at least one BWP in the group to which the at least one BWP belongs, and the at least One BWP includes the first BWP.
  • the first information is carried in the second DCI, and the second DCI is scrambled by the G-RNTI associated with the first service; or, the first information is carried in the MAC layer control message or RLC layer control messages or PDCP layer control messages.
  • the communication unit 1103 is further configured to receive a request message from the terminal device, where the request message is used to request to perform BWP handover; and, send to the terminal device according to the request message A response message, where the response message is used to indicate to switch the first BWP to the third BWP.
  • the request message includes the identification of at least one candidate BWP; the request message is used to request to perform BWP switching, and includes: the request message is used to request to switch the first BWP Is one BWP of the at least one candidate BWP; the response message includes an identifier of a third BWP, and the third BWP is determined according to the at least one candidate BWP.
  • each unit in the device can be all implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; part of the units can also be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware.
  • each unit can be a separate processing element, or it can be integrated in a certain chip of the device for implementation.
  • it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device. Function.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: one or more application specific integrated circuits (ASIC), or, one or Multiple microprocessors (digital singnal processors, DSPs), or, one or more field programmable gate arrays (Field Programmable Gate Arrays, FPGAs), or a combination of at least two of these integrated circuit forms.
  • ASIC application specific integrated circuits
  • DSPs digital singnal processors
  • FPGAs Field Programmable Gate Arrays
  • the unit in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a processor, such as a general-purpose central processing unit (central processing unit, CPU), or other processors that can call programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the above receiving unit is an interface circuit of the device for receiving signals from other devices.
  • the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices.
  • the above unit for sending is an interface circuit of the device for sending signals to other devices.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of the application. It may be the terminal device in the above embodiment, and is used to implement the operation of the terminal device in the above embodiment.
  • the terminal device includes: an antenna 1210, a radio frequency part 1220, and a signal processing part 1230.
  • the antenna 1210 is connected to the radio frequency part 1220.
  • the radio frequency part 1220 receives the information sent by the network device through the antenna 1210, and sends the information sent by the network device to the signal processing part 1230 for processing.
  • the signal processing part 1230 processes the information of the terminal equipment and sends it to the radio frequency part 1220
  • the radio frequency part 1220 processes the information of the terminal equipment and sends it to the network equipment via the antenna 1210.
  • the signal processing part 1230 may include a modem subsystem, which is used to process the various communication protocol layers of the data; it may also include a central processing subsystem, which is used to process the terminal device operating system and application layer; in addition, it may also Including other subsystems, such as multimedia subsystems, peripheral subsystems, etc., where the multimedia subsystem is used to control the terminal device camera, screen display, etc., and the peripheral subsystem is used to realize the connection with other devices.
  • the modem subsystem can be a separate chip.
  • the modem subsystem may include one or more processing elements 1231, for example, including a main control CPU and other integrated circuits.
  • the modem subsystem may also include a storage element 1232 and an interface circuit 1233.
  • the storage element 1232 is used to store data and programs, but the program used to execute the method executed by the terminal device in the above method may not be stored in the storage element 1232, but is stored in a memory outside the modem subsystem, When in use, the modem subsystem is loaded and used.
  • the interface circuit 1233 is used to communicate with other subsystems.
  • the modem subsystem can be implemented by a chip, the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute each step of any method executed by the above terminal device, and the interface circuit is used to communicate with other devices.
  • the unit for the terminal device to implement each step in the above method can be implemented in the form of a processing element scheduler.
  • the device for the terminal device includes a processing element and a storage element, and the processing element calls the program stored by the storage element to Perform the method performed by the terminal device in the above method embodiment.
  • the storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.
  • the program used to execute the method executed by the terminal device in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal device in the above method embodiment.
  • the unit of the terminal device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are arranged on the modem subsystem, where the processing elements may be integrated circuits, For example: one or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units of the terminal device that implement each step in the above method can be integrated together and implemented in the form of an SOC, and the SOC chip is used to implement the above method.
  • the chip can integrate at least one processing element and a storage element, and the processing element can call the stored program of the storage element to implement the method executed by the above terminal device; or, the chip can integrate at least one integrated circuit to implement the above terminal The method executed by the device; or, it can be combined with the above implementations.
  • the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus for terminal equipment may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any of the methods performed by the terminal equipment provided in the above method embodiments.
  • the processing element can execute part or all of the steps executed by the terminal device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the terminal device are executed in a manner; of course, part or all of the steps executed by the terminal device can also be executed in combination with the first manner and the second manner.
  • the processing element here is the same as that described above and can be implemented by a processor, and the function of the processing element can be the same as the function of the processing unit described in FIG. 11.
  • the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more microprocessors DSP , Or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 11.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 11.
  • the storage element can be a single memory or a collective term for multiple memories.
  • the terminal device shown in FIG. 12 can implement various processes involving the terminal device in the method embodiment illustrated in FIG. 5, FIG. 7, FIG. 8 or FIG. 9.
  • the operations and/or functions of each module in the terminal device shown in FIG. 12 are respectively for implementing the corresponding processes in the foregoing method embodiments.
  • FIG. 13 is a schematic structural diagram of a network device provided by an embodiment of this application. It is used to implement the operation of the network device (such as the first network device or the second network device) in the above embodiment.
  • the network equipment includes: an antenna 1301, a radio frequency device 1302, and a baseband device 1303.
  • the antenna 1301 is connected to the radio frequency device 1302.
  • the radio frequency device 1302 receives the information sent by the terminal device through the antenna 1301, and sends the information sent by the terminal device to the baseband device 1303 for processing.
  • the baseband device 1303 processes the information of the terminal device and sends it to the radio frequency device 1302, and the radio frequency device 1302 processes the information of the terminal device and sends it to the terminal device via the antenna 1301.
  • the baseband device 1303 may include one or more processing elements 13031, for example, a main control CPU and other integrated circuits.
  • the baseband device 1303 may also include a storage element 13032 and an interface 13033.
  • the storage element 13032 is used to store programs and data; the interface 13033 is used to exchange information with the radio frequency device 1302.
  • the interface is, for example, a common public radio interface. , CPRI).
  • the above apparatus for network equipment may be located in the baseband apparatus 1303.
  • the above apparatus for network equipment may be a chip on the baseband apparatus 1303.
  • the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute the above network. For each step of any method executed by the device, the interface circuit is used to communicate with other devices.
  • the unit for the network device to implement each step in the above method can be implemented in the form of a processing element scheduler.
  • the device for the network device includes a processing element and a storage element, and the processing element calls the program stored by the storage element to Perform the method performed by the network device in the above method embodiment.
  • the storage element may be a storage element with the processing element on the same chip, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the unit of the network device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are arranged on the baseband device.
  • the processing elements here may be integrated circuits, such as one Or multiple ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units for the network equipment to implement each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the baseband device includes the SOC chip for implementing the above method.
  • At least one processing element and storage element can be integrated in the chip, and the processing element can call the stored program of the storage element to implement the method executed by the above network device; or, at least one integrated circuit can be integrated in the chip to implement the above network The method executed by the device; or, it can be combined with the above implementations.
  • the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus for a network device may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any of the methods performed by the network device provided in the above method embodiments.
  • the processing element can execute part or all of the steps executed by the network device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the network device are executed in the method; of course, part or all of the steps executed by the network device above can also be executed in combination with the first method and the second method.
  • the processing element here is the same as that described above and can be implemented by a processor, and the function of the processing element can be the same as the function of the processing unit described in FIG. 11.
  • the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above methods, such as: one or more ASICs, or, one or more microprocessors DSP , Or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 11.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 11.
  • the storage element can be a single memory or a collective term for multiple memories.
  • the network device shown in FIG. 13 can implement various processes involving the network device in the method embodiment illustrated in FIG. 5, FIG. 7, FIG. 8 or FIG. 9.
  • the operations and/or functions of the various modules in the network device shown in FIG. 13 are used to implement the corresponding processes in the foregoing method embodiments.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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

Abstract

La présente demande se rapporte au domaine technique des communications. Un procédé et un appareil de communication sont divulgués. Le procédé comprend : un dispositif terminal reçoit des premières informations en provenance d'un dispositif de réseau, les premières informations étant utilisées pour amener à recevoir une transmission de multidiffusion d'un premier service sur une première BWP ; et, ainsi, le dispositif terminal commute une BWP activée d'une seconde BWP à la première BWP en fonction des premières informations et reçoit la transmission de multidiffusion du premier service sur la première BWP. Le procédé permet au dispositif de réseau d'amener, au moyen des premières informations, le dispositif terminal à recevoir la transmission de multidiffusion du premier service sur la première BWP et ainsi le dispositif terminal commute vers la première BWP en fonction des premières informations, de telle sorte que le dispositif terminal commute vers une BWP de multidiffusion pour recevoir la transmission de multidiffusion du service.
PCT/CN2021/086241 2020-04-14 2021-04-09 Procédé et appareil de communication WO2021208819A1 (fr)

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CN202010292339.9 2020-04-14
CN202010292339.9A CN113543037A (zh) 2020-04-14 2020-04-14 一种通信方法及装置

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Publication number Priority date Publication date Assignee Title
CN113993217A (zh) * 2021-10-28 2022-01-28 北京长焜科技有限公司 一种bwp切换的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019097432A1 (fr) * 2017-11-16 2019-05-23 Telefonaktiebolaget Lm Ericsson (Publ) Reconfiguration de défaillance de liaison radio/surveillance de liaison radio lors d'une commutation de parties de bande passante
CN109995497A (zh) * 2018-02-14 2019-07-09 华为技术有限公司 下行控制信息传输方法
WO2019160903A1 (fr) * 2018-02-16 2019-08-22 Qualcomm Incorporated Schémas de signalisation d'informations de commande en liaison descendante pour commutation de partie de largeur de bande
WO2019217007A1 (fr) * 2018-05-10 2019-11-14 Convida Wireless, Llc Découpage en canaux, et bwp
CN110945940A (zh) * 2018-05-16 2020-03-31 Lg电子株式会社 用于发送和接收数据信道的方法和设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019097432A1 (fr) * 2017-11-16 2019-05-23 Telefonaktiebolaget Lm Ericsson (Publ) Reconfiguration de défaillance de liaison radio/surveillance de liaison radio lors d'une commutation de parties de bande passante
CN109995497A (zh) * 2018-02-14 2019-07-09 华为技术有限公司 下行控制信息传输方法
WO2019160903A1 (fr) * 2018-02-16 2019-08-22 Qualcomm Incorporated Schémas de signalisation d'informations de commande en liaison descendante pour commutation de partie de largeur de bande
WO2019217007A1 (fr) * 2018-05-10 2019-11-14 Convida Wireless, Llc Découpage en canaux, et bwp
CN110945940A (zh) * 2018-05-16 2020-03-31 Lg电子株式会社 用于发送和接收数据信道的方法和设备

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