WO2021227849A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2021227849A1
WO2021227849A1 PCT/CN2021/089694 CN2021089694W WO2021227849A1 WO 2021227849 A1 WO2021227849 A1 WO 2021227849A1 CN 2021089694 W CN2021089694 W CN 2021089694W WO 2021227849 A1 WO2021227849 A1 WO 2021227849A1
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information
broadcast
semi
persistent scheduling
multicast service
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PCT/CN2021/089694
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English (en)
Chinese (zh)
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张向东
常俊仁
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华为技术有限公司
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Publication of WO2021227849A1 publication Critical patent/WO2021227849A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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
    • 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
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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
    • 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

  • the present application relates to the field of communication, and more specifically, to a communication method and communication device for broadcast multicast services.
  • a known broadcast and multicast service transmission scheme is a scheduling-based broadcast and multicast service transmission scheme.
  • the network device sends the broadcast and multicast service through the downlink control channel before sending the broadcast and multicast service.
  • Scheduling information so that the terminal device as the target device of the broadcast-multicast service can receive the broadcast-multicast service according to the scheduling information.
  • the broadcast and multicast services have grown massively.
  • the overhead of scheduling information is also greatly increased, which occupies a large amount of communication resources.
  • the network device since the network device must send scheduling information before each broadcast and multicast service is sent, the communication delay is increased.
  • the present application provides a communication method and communication device, which can reduce the resource overhead and communication delay of the broadcast and multicast service.
  • a communication method including: sending first information to a first terminal device, where the first information is used to indicate a first semi-persistent scheduling parameter of a first broadcast-multicast service, and the first terminal device is a first terminal device.
  • the terminal device in the device group, the terminal device in the first device group is the destination device of the first broadcast-multicast service; according to the first semi-persistent scheduling parameter, the first broadcast-multicast service is sent.
  • broadcast and multicast services can be understood as: broadcast services and/or multicast services.
  • the terminal device in the first device group is the destination device of the first broadcast and multicast service.
  • the "destination device” can be understood as: a terminal device that is interested in broadcast and multicast services, or a terminal device that is receiving broadcast and multicast services, or a terminal device that is about to (or is ready to) receive broadcast and multicast services Wait.
  • the terminal devices in the first device group include: terminal devices that are interested in the first broadcast and multicast service, or terminal devices that are receiving the first broadcast and multicast service, or are about to (or are ready to) receive the first broadcast and multicast service.
  • the network device transmits the semi-persistent scheduling parameters for the broadcast and multicast services, and the terminal equipment receives the broadcast and multicast services based on the semi-persistent scheduling parameters during the valid period of the semi-static scheduling configuration, and needs to send multiple broadcasts during the valid period of the semi-static configuration.
  • the terminal equipment receives the broadcast and multicast services based on the semi-persistent scheduling parameters during the valid period of the semi-static scheduling configuration, and needs to send multiple broadcasts during the valid period of the semi-static configuration.
  • there is no need to repeatedly send scheduling information so that the resource overhead and communication delay of the broadcast multicast service can be reduced.
  • the first semi-persistent scheduling parameter includes at least one of the following parameters: time-frequency resources (specifically, time-frequency resources used to carry the first broadcast-multicast service), feedback resources (specifically, The time-frequency resources used to carry the feedback information for the first broadcast-multicast service), modulation and coding strategy MCS, hybrid automatic repeat request HARQ process number, repetition times, redundancy version RV, retransmission mode; among them, retransmission
  • the transmission method includes feedback-based retransmission or blind retransmission. Because broadcast and multicast services are generally downlink data, the above-mentioned time-frequency resources generally refer to downlink time-frequency resources, and feedback resources are uplink feedback resources.
  • the feedback mode in the feedback-based retransmission includes a first feedback mode or a second feedback mode.
  • the first feedback mode includes feedback based on non-acknowledgement information NACK
  • the second feedback mode includes feedback based on acknowledgement information ACK or NACK. .
  • the first semi-persistent scheduling parameter also includes the target feedback mode in the first feedback mode and the second feedback mode.
  • the first semi-persistent scheduling parameter includes an indication information
  • the indication information is used to indicate one or more of the following information:
  • the first information may be sent in a unicast manner, that is, the network device determines the terminal devices (including the first terminal device) that need to receive the first broadcast/multicast service, and then may separately send to the terminal devices that need to receive the first broadcast Each terminal device of the multicast service sends the first information.
  • the first terminal device may be a terminal device in a connected state.
  • the first terminal device may be a terminal device in an inactive state (for example, an INACTIVE state).
  • the first information may be sent by broadcast or multicast, that is, the network device may send a broadcast message, and the broadcast message carries the first information.
  • the broadcast message may also carry the first broadcast-multicast
  • the service identifier of the service or the broadcast message may also carry the device identifier of the terminal device (including the first terminal device) that needs to receive the first broadcast/multicast service, or the terminal that needs to receive the first broadcast/multicast service
  • the device group identifier of the device group including the first terminal device).
  • the first terminal device may be a terminal device in a non-connected state (for example, an idle state, an inactive state).
  • the first terminal device may be a terminal device in a connected state.
  • the first semi-persistent scheduling parameter includes a time interval (or referred to as a semi-static period, or period), and the time interval is a time interval between two adjacent transmissions of the first broadcast-multicast service.
  • the network device periodically sends the first broadcast-multicast service to the terminal device every this time interval.
  • the validity period (in other words, the validity period or the validity period) of the first semi-persistent scheduling parameter may be explicitly indicated by the network device.
  • the method further includes: sending sixth information to the first terminal device, where the sixth information is used to indicate the validity period of the first semi-persistent scheduling parameter.
  • the validity period of the first semi-persistent scheduling parameter may include one or more of the foregoing semi-static periods.
  • the sixth information may indicate the start time and/or end time of the validity period.
  • the sixth information may indicate the duration of the validity period.
  • the resources configured by the first semi-persistent scheduling parameters appear periodically (for example, periodically appearing at the intervals mentioned above), and the first semi-persistent scheduling parameter configuration can be determined according to the configured validity period of the first semi-persistent scheduling The starting time and/or duration of the resource’s appearance.
  • the sixth information may indicate the index of the validity period in multiple periods.
  • the first information and the sixth information may be the same information or different information, and may be carried in the same message or different messages, which is not particularly limited in this application.
  • the validity period of the first semi-persistent scheduling parameter may be implicitly indicated by the network device.
  • the validity period of the first semi-persistent scheduling parameter includes the period in which the transmission moment of the first information is located.
  • the validity period of the first semi-persistent scheduling parameter includes the t-th period after the period in which the transmission moment of the first information is located, and t ⁇ 1.
  • the value of t may be specified by the communication system or communication protocol, or the value of t may be pre-indicated by the network device.
  • the first semi-persistent scheduling parameter is a transmission parameter shared by multiple broadcast-multicast services including the first broadcast-multicast service.
  • the parameters included in the first semi-persistent scheduling parameter are parameters configured for multiple broadcast and multicast services, or the included parameters are valid for multiple broadcast and multicast services.
  • the first information includes the identifier of each of the multiple broadcast and multicast services.
  • the identifier of the broadcast-multicast service includes the radio network temporary identifier RNTI corresponding to the broadcast-multicast service.
  • the multiple reference signals are in one-to-one correspondence with multiple broadcast multicast services
  • the method further includes: sending a first reference signal, where the first reference signal is a reference signal corresponding to the first broadcast multicast service.
  • the first reference signal is used for transmission of the first broadcast multicast service.
  • the first reference signal includes the demodulation reference signal DMRS of the data of the first broadcast multicast service.
  • the functions of the first reference signal listed above are only exemplary descriptions, and the present application is not limited thereto.
  • the first reference signal may also be used for channel estimation of the transmission channel of the first broadcast multicast service.
  • the method further includes: sending second information to the terminal device, where the second information is used to indicate the correspondence between the multiple reference signals and the multiple broadcast and multicast services.
  • any two reference signals of the plurality of reference signals include at least one different parameter.
  • the above parameters include but are not limited to one or more of sequence, density, location, and port.
  • the terminal device can blindly detect the reference signal, and according to the detected reference signal, determine the broadcast multicast service (that is, the first broadcast multicast service) that needs to be received according to the first semi-persistent scheduling parameter.
  • the first information is used to indicate multiple semi-persistent scheduling parameters including the first semi-persistent scheduling parameter.
  • multiple semi-persistent scheduling parameters including the first semi-persistent scheduling parameter may share the same effective period.
  • the multiple reference signals have a one-to-one correspondence with the multiple semi-persistent scheduling parameters
  • the above method further includes: sending a first reference signal, where the first reference signal is a reference signal corresponding to the first semi-persistent scheduling parameter.
  • the first reference signal is used for transmission of the first broadcast multicast service.
  • the first reference signal includes the demodulation reference signal DMRS of the data of the first broadcast multicast service.
  • the functions of the first reference signal listed above are only exemplary descriptions, and the present application is not limited thereto.
  • the first reference signal may also be used for channel estimation of the transmission channel of the first broadcast multicast service.
  • the above method further includes: sending seventh information to the terminal device, where the seventh information is used to indicate the correspondence between multiple reference signals and multiple semi-persistent scheduling parameters.
  • any two reference signals of the plurality of reference signals include at least one different parameter.
  • the above parameters include but are not limited to one or more of sequence, density, location, and port.
  • the terminal device can blindly detect the reference signal, and according to the detected reference signal, determine the semi-persistent scheduling parameter (that is, the first semi-persistent scheduling parameter) that needs to be used in the effective period.
  • the third information is used to trigger the terminal device to switch the used BWP according to a predetermined rule.
  • the method further includes: sending third information to the terminal device, where the third information is used to indicate that the first broadcast-multicast service is carried by the first bandwidth part in the first semi-persistent scheduling period.
  • the first half of the static scheduling period includes the semi-persistent scheduling period at which the third information is sent, or the first semi-persistent scheduling period includes the k-th half after the semi-persistent scheduling period at the sending time of the third information. Static scheduling period, k ⁇ 1. It can be seen that, at this time, the third information can realize the transformation of the broadband part (BWP) that bears the broadcast-multicast service.
  • BWP broadband part
  • the broadband part carrying the broadcast and multicast service is the second part of the bandwidth
  • the third information is used to indicate that the broadband part carrying the broadcast and multicast service will be converted into the first part of the bandwidth.
  • the conversion time may be the time at which the third information was sent, or a time after the time at which the third information was sent.
  • the third information is used to indicate that the first bandwidth part carries the broadcast multicast service in the first semi-persistent scheduling period.
  • the third information is used to indicate The semi-persistent scheduling resources included in the semi-persistent scheduling period at which the transmission time of the third information is located are on the first bandwidth part, or indicate the k-th semi-persistent scheduling period after the semi-persistent scheduling period at which the transmission time of the third information is located The corresponding semi-persistent scheduling resource is on the first bandwidth part.
  • the value of k may be pre-defined by the communication system or communication protocol, or the value of k may also be pre-indicated by the network device.
  • the first semi-persistent scheduling period may include one period or multiple periods, which is not limited in this application.
  • the third information indicates that within N cycles after the third information moment, the first bandwidth portion is used to carry the broadcast service.
  • the third information is used to indicate that according to the first arrangement sequence, during the first semi-persistent scheduling period, the second bandwidth part bears the first broadcast multicast service, and the first bandwidth part bears the first broadcast multicast service.
  • the second bandwidth part is the currently used bandwidth part
  • the first arrangement order is the arrangement order of multiple bandwidth parts including the first bandwidth part and the second bandwidth part.
  • the above-mentioned first arrangement order may be stipulated by the communication system or communication protocol, or may be pre-indicated by the network device, which is not particularly limited in this application.
  • first bandwidth part listed above are only illustrative, and this application is not particularly limited, as long as the network device and the terminal device can determine that the first bandwidth part is consistent, this application is not particularly limited.
  • the correspondence between multiple BWPs and multiple identification information can be established, so that the terminal device can determine the BWP to be used by issuing the identification information corresponding to the first BWP.
  • multiple bandwidth parts including the first bandwidth part are in one-to-one correspondence with multiple pieces of identification information, and the third information is used to indicate the first identification information corresponding to the first bandwidth part.
  • the first identification information includes a reference signal corresponding to the first BWP (for example, a reference signal). the sequence of).
  • an index value may be configured for each BWP in the multiple BWPs.
  • the first identification information includes the index value of the first bandwidth part.
  • the method further includes: sending fourth information to the terminal device, where the fourth information is used to indicate the correspondence between multiple bandwidth parts and multiple identification information (for example, reference signal sequences or index values).
  • fourth information for example, reference signal sequences or index values.
  • the third information is carried in any one of the following: a reference signal, a medium access control control unit, or a data packet.
  • the network device needs to dynamically indicate the BWP used to carry the service through the downlink control channel.
  • a communication method including: receiving first information, where the first information is used to indicate a first semi-persistent scheduling parameter of a first broadcast-multicast service; and receiving the first broadcast according to the first semi-persistent scheduling parameter Multicast services.
  • the network equipment transmits the semi-persistent scheduling parameters for the broadcast and multicast services, and the terminal equipment receives the broadcast and multicast services based on the semi-persistent scheduling parameters in the semi-static scheduling period, and needs to send multiple broadcasts and multicasts in the semi-static period. In the case of services, there is no need to repeatedly send scheduling information, which can reduce the resource overhead and communication delay of broadcast and multicast services.
  • the first semi-persistent scheduling parameter includes at least one of the following parameters: time-frequency resources (specifically, time-frequency resources used to carry the first broadcast-multicast service), feedback resources (specifically, The time-frequency resources used to carry the feedback information for the first broadcast-multicast service), modulation and coding strategy MCS, hybrid automatic repeat request HARQ process number, repetition times, redundancy version RV, retransmission mode; among them, retransmission
  • the transmission method includes feedback-based retransmission or blind retransmission. Because broadcast and multicast services are generally downlink data, the above-mentioned time-frequency resources generally refer to downlink time-frequency resources, and feedback resources are uplink feedback resources.
  • the feedback mode in the feedback-based retransmission includes a first feedback mode or a second feedback mode.
  • the first feedback mode includes feedback based on non-acknowledgement information NACK
  • the second feedback mode includes feedback based on acknowledgement information ACK or NACK. Feedback.
  • the first semi-persistent scheduling parameter also includes the target feedback mode in the first feedback mode and the second feedback mode.
  • the first information may be sent in a unicast manner, that is, the network device determines the terminal devices (including the first terminal device) that need to receive the first broadcast/multicast service, and then may separately send to the terminal devices that need to receive the first broadcast Each terminal device of the multicast service sends the first information.
  • the receiving device of the first information (ie, the first terminal device) may be a terminal device in a connected state.
  • the first terminal device may be a terminal device in an inactive state (for example, an INACTIVE state).
  • the first information may be sent by broadcast or multicast, that is, the network device may send a broadcast message, and the broadcast message carries the first information.
  • the broadcast message may also carry the first broadcast-multicast
  • the service identifier of the service or the broadcast message may also carry the device identifier of the terminal device (including the first terminal device) that needs to receive the first broadcast/multicast service, or the terminal that needs to receive the first broadcast/multicast service
  • the device group identifier of the device group including the first terminal device).
  • the first terminal device may be a terminal device in a non-connected state (for example, an idle state or an inactive state).
  • the first terminal device may be an activated terminal device.
  • the first semi-persistent scheduling parameter includes a time interval (or referred to as a semi-static period, or period), and the time interval is a time interval between two adjacent transmissions of the first broadcast-multicast service.
  • the network device periodically sends the first broadcast multicast service to the terminal device every this time interval, and correspondingly, the terminal device receives the first broadcast multicast service every this time interval.
  • the validity period (in other words, the validity period or the validity period) of the first semi-persistent scheduling parameter may be explicitly indicated by the network device.
  • the method further includes: receiving and sending sixth information, where the sixth information is used to indicate the validity period of the first semi-persistent scheduling parameter.
  • the validity period of the first semi-persistent scheduling parameter may include one or more of the foregoing semi-static periods.
  • the sixth information may indicate the start time and/or end time of the validity period.
  • the sixth information may indicate the duration of the validity period.
  • the sixth information may indicate the index of the validity period in multiple periods.
  • the first information and the sixth information may be the same information or different information, which is not particularly limited in this application.
  • the validity period of the first semi-persistent scheduling parameter may be implicitly indicated by the network device.
  • the validity period of the first semi-persistent scheduling parameter includes the period in which the transmission moment of the first information is located.
  • the validity period may include one semi-static configuration period or multiple semi-static configuration periods, which is not limited in this application.
  • the semi-static configuration period may be specified by the communication system or communication protocol, or may be instructed in advance by the network device, which is not specifically limited in this application.
  • the validity period of the first semi-persistent scheduling parameter includes the t-th period after the period in which the sending moment of the first information is located, and t ⁇ 1.
  • the value of t may be specified by the communication system or communication protocol, or the value of t may be pre-indicated by the network device.
  • the first semi-persistent scheduling parameter is a transmission parameter shared by multiple broadcast-multicast services including the first broadcast-multicast service.
  • the first information further includes an identifier of each of the multiple broadcast and multicast services.
  • the identifier of the broadcast-multicast service includes the radio network temporary identifier RNTI corresponding to the broadcast-multicast service.
  • the multiple reference signals are in one-to-one correspondence with multiple broadcast and multicast services
  • the above method further includes: receiving a first reference signal; and determining the broadcast and multicast service corresponding to the first reference signal as the first broadcast and multicast service .
  • the first reference signal is used for transmission of the first broadcast multicast service.
  • the first reference signal includes the demodulation reference signal DMRS of the data of the first broadcast multicast service.
  • the functions of the first reference signal listed above are only exemplary descriptions, and the present application is not limited thereto.
  • the first reference signal may also be used for channel estimation of the transmission channel of the first broadcast multicast service.
  • the above method further includes: receiving second information, where the second information is used to indicate the correspondence between multiple reference signals and multiple broadcast multicast services.
  • any two reference signals of the plurality of reference signals include at least one different parameter.
  • Parameters include, but are not limited to, one or more of sequence, density, location, and port.
  • the terminal device can blindly detect the reference signal, and according to the detected reference signal, determine the broadcast multicast service (that is, the first broadcast multicast service) that needs to be received according to the first semi-persistent scheduling parameter.
  • the first information is used to indicate multiple semi-persistent scheduling parameters including the first semi-persistent scheduling parameter.
  • multiple semi-persistent scheduling parameters including the first semi-persistent scheduling parameter may share the same effective period.
  • the multiple reference signals are in one-to-one correspondence with the multiple semi-persistent scheduling parameters
  • the above method further includes: receiving the first reference signal, and determining the semi-persistent scheduling parameter corresponding to the first reference signal as the first semi-persistent scheduling parameter.
  • the first reference signal is used for transmission of the first broadcast multicast service.
  • the first reference signal includes the demodulation reference signal DMRS of the data of the first broadcast multicast service.
  • the functions of the first reference signal listed above are only exemplary descriptions, and the present application is not limited thereto.
  • the first reference signal may also be used for channel estimation of the transmission channel of the first broadcast multicast service.
  • the above method further includes: receiving seventh information, where the seventh information is used to indicate the correspondence between multiple reference signals and multiple semi-persistent scheduling parameters.
  • any two reference signals of the plurality of reference signals include at least one different parameter.
  • Parameters include, but are not limited to, one or more of sequence, density, location, and port.
  • the terminal device can blindly detect the reference signal, and according to the detected reference signal, determine the semi-persistent scheduling parameter (that is, the first semi-persistent scheduling parameter) that needs to be used in the effective period.
  • each of the multiple reference signals corresponds to one or more HARQ processes
  • the above method further includes: receiving the first reference signal; and receiving the first broadcast multicast service according to the first semi-persistent scheduling parameter , Including: receiving the first broadcast multicast service by using the HARQ process corresponding to the first reference signal according to the first semi-persistent scheduling parameter.
  • the correspondence relationship between multiple reference signals (for example, demodulation reference signals) and multiple HARQ processes can be established, so that Based on the demodulation reference signal of the first broadcast-multicast service, the HARQ process used to transmit the first broadcast-multicast service is determined.
  • demodulation reference signals for example, demodulation reference signals
  • the resource overhead caused by the HARQ process indication can be reduced.
  • the above method further includes: receiving fifth information, where the fifth information is used to indicate the correspondence between multiple reference signals and multiple HARQ processes.
  • the third information is used to trigger the terminal device to switch the used BWP according to a predetermined rule.
  • the above method further includes: receiving and sending third information, where the third information is used to indicate that the broadcast multicast service is carried by the first bandwidth part in the first semi-persistent scheduling period, and the first semi-persistent scheduling period includes the third The semi-persistent scheduling period in which the information is sent, or the first semi-persistent scheduling period includes the kth semi-persistent scheduling period after the semi-persistent scheduling period in which the third information is sent, k ⁇ 1.
  • the value of k may be pre-defined by the communication system or communication protocol, or the value of k may also be pre-indicated by the network device.
  • the first semi-persistent scheduling period may include one period or multiple periods, which is not limited in this application.
  • the third information indicates that within N cycles after the third information moment, the first bandwidth portion is used to carry the broadcast service.
  • the third information is used to indicate that according to the first arrangement sequence, during the first semi-persistent scheduling period, the second bandwidth part bears the first broadcast multicast service, and the first bandwidth part bears the first broadcast multicast service.
  • the second bandwidth part is the currently used bandwidth part
  • the first arrangement order is the arrangement order of multiple bandwidth parts including the first bandwidth part and the second bandwidth part.
  • the correspondence between multiple BWPs and multiple identification information can be established, so that the terminal device can determine the BPW to be used by issuing the identification information corresponding to the first BPW.
  • multiple bandwidth parts including the first bandwidth part are in one-to-one correspondence with multiple pieces of identification information, and the third information is used to indicate the first identification information corresponding to the first bandwidth part.
  • the first identification information includes a reference signal corresponding to the first BWP (for example, a reference signal). the sequence of).
  • an index value may be configured for each BWP in the multiple BWPs.
  • the first identification information includes the index value of the first bandwidth part.
  • the foregoing method further includes: receiving fourth information, where the fourth information is used to indicate a correspondence between multiple bandwidth parts and multiple identification information (for example, reference signal sequences or index values).
  • fourth information for example, reference signal sequences or index values.
  • the third information is carried in any one of the following: a reference signal, a medium access control control unit, or a data packet.
  • the network device needs to dynamically indicate the BWP used to carry the service through the downlink control channel.
  • a communication device including: a transceiving unit, configured to send first information to a first terminal device, where the first information is used to indicate a first semi-persistent scheduling parameter of a first broadcast-multicast service;
  • the terminal device is the terminal device in the first device group, and the terminal device in the first device group is the destination device of the first broadcast and multicast service;
  • the processing unit is configured to control the transceiver unit to send the first device according to the first semi-persistent scheduling parameter. Broadcast and multicast services.
  • the transceiver unit is further configured to send sixth information to the first terminal device, where the sixth information is used to indicate the validity period of the first semi-persistent scheduling parameter.
  • the transceiver unit is further configured to send second information to the terminal device, where the second information is used to indicate the correspondence between multiple reference signals and multiple broadcast and multicast services.
  • the transceiver unit is further configured to send a first reference signal, where the first reference signal is a reference signal corresponding to the first semi-persistent scheduling parameter.
  • the first reference signal is used for transmission of the first broadcast multicast service.
  • the first reference signal includes the demodulation reference signal DMRS of the data of the first broadcast multicast service.
  • the transceiver unit is further configured to send seventh information to the terminal device, where the seventh information is used to indicate the correspondence between multiple reference signals and multiple semi-persistent scheduling parameters.
  • the transceiver unit is further configured to send third information to the terminal device, the third information is used to indicate that the first broadcast multicast service is carried by the first bandwidth part in the first semi-persistent scheduling period, and the first semi-persistent scheduling period includes The semi-persistent scheduling period in which the third information is sent, or the first semi-persistent scheduling period includes the kth semi-persistent scheduling period after the semi-persistent scheduling period in which the third information is sent, k ⁇ 1 .
  • the transceiver unit is further configured to send fourth information to the terminal device, where the fourth information is used to indicate the correspondence between multiple bandwidth parts and multiple identification information (for example, reference signal sequences or index values).
  • fourth information is used to indicate the correspondence between multiple bandwidth parts and multiple identification information (for example, reference signal sequences or index values).
  • each unit in the device is respectively used to execute each step of the communication method in the above-mentioned first aspect and any one of its implementation manners.
  • the device is a communication chip
  • the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the device is a communication device, and the communication device may include a transmitter for sending information or data, and a receiver for receiving information or data.
  • a communication device including: a transceiver unit, configured to receive first information, where the first information is used to indicate a first semi-persistent scheduling parameter of a first broadcast-multicast service;
  • the semi-persistent scheduling parameter controls the transceiver unit to receive the first broadcast multicast service.
  • the transceiver unit is further configured to receive sixth information, where the sixth information is used to indicate the validity period of the first semi-persistent scheduling parameter.
  • the transceiver unit is further configured to receive the first reference signal; the processing unit is further configured to determine the broadcast multicast service corresponding to the first reference signal as the first broadcast multicast service.
  • the first reference signal is used for transmission of the first broadcast multicast service.
  • the first reference signal includes the demodulation reference signal DMRS of the data of the first broadcast multicast service.
  • the transceiver unit is further configured to receive second information, where the second information is used to indicate the correspondence between multiple reference signals and multiple broadcast and multicast services.
  • the transceiver unit is further configured to receive the first reference signal, and determine the semi-persistent scheduling parameter corresponding to the first reference signal as the first semi-persistent scheduling parameter.
  • the transceiver unit is further configured to receive seventh information, where the seventh information is used to indicate the correspondence between multiple reference signals and multiple semi-persistent scheduling parameters.
  • each of the multiple reference signals corresponds to one or more HARQ processes
  • the transceiver unit is further configured to receive the first reference signal
  • the processing unit is further configured to use the first semi-persistent scheduling parameter according to the first semi-persistent scheduling parameter.
  • the transceiver unit is controlled to receive the first broadcast multicast service.
  • the transceiver unit is further configured to receive fifth information, where the fifth information is used to indicate the correspondence between multiple reference signals and multiple HARQ processes.
  • the transceiver unit is further configured to receive and send third information, where the third information is used to indicate that the first broadcast and multicast service is carried by the first bandwidth part in the first semi-persistent scheduling period, and the first semi-persistent scheduling period includes the third The semi-persistent scheduling period in which the information is sent, or the first semi-persistent scheduling period includes the kth semi-persistent scheduling period after the semi-persistent scheduling period in which the third information is sent, k ⁇ 1.
  • the transceiver unit is further configured to receive fourth information, where the fourth information is used to indicate the correspondence between multiple bandwidth parts and multiple identification information (for example, reference signal sequences or index values).
  • fourth information is used to indicate the correspondence between multiple bandwidth parts and multiple identification information (for example, reference signal sequences or index values).
  • each unit in the device is respectively used to execute each step of the communication method in the above second aspect and any one of its implementation manners.
  • the device is a communication chip
  • the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the device is a communication device, and the communication device may include a transmitter for sending information or data, and a receiver for receiving information or data.
  • a communication device including a processor, the processor is coupled with a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device executes the first On the one hand and the communication methods in its various implementations.
  • processors there are one or more processors, and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the communication device further includes a transmitter (transmitter) and a receiver (receiver).
  • a communication device including a processor, the processor is coupled with a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device executes the first Two aspects and communication methods in various implementations.
  • processors there are one or more processors, and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the communication device further includes a transmitter (transmitter) and a receiver (receiver).
  • a communication system including a network device and a terminal device.
  • the network device is used to execute the above-mentioned first aspect and its implementation methods
  • the terminal device is used to execute the above-mentioned second aspect and its implementation methods.
  • the communication system may also include other devices that interact with network devices or terminal devices in the solution provided in the embodiments of the present application.
  • a computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the first aspect or the second aspect and its The method in the possible implementation mode.
  • a computer program also called code, or instruction
  • a computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the first aspect or the second aspect. And its possible implementation methods.
  • a chip system including a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a communication device installed with the chip system executes the foregoing The method in the first aspect or the second aspect and possible implementations thereof.
  • the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • Fig. 1 is a schematic architecture diagram of an example of the communication system of the present application.
  • Fig. 2 is a schematic interaction diagram of an example of the communication method of the present application.
  • Fig. 3 is a schematic diagram of an example of the validity period of the semi-persistent scheduling parameters of the present application.
  • Fig. 4 is a schematic interaction diagram of another example of the communication method of the present application.
  • Fig. 5 is a schematic interaction diagram of another example of the communication method of the present application.
  • Fig. 6 is a schematic interaction diagram of another example of the communication method of the present application.
  • Fig. 7 is a schematic interaction diagram of another example of the communication method of the present application.
  • FIG. 8 is a schematic interaction diagram of another example of the communication method of the present application.
  • Fig. 9 is a schematic configuration diagram of an example of the communication device of the present application.
  • Fig. 10 is a schematic structural diagram of an example of a network device of the present application.
  • FIG. 11 is a schematic structural diagram of another example of the communication device of the present application.
  • Fig. 12 is a schematic structural diagram of an example of a terminal device of the present application.
  • GSM Global System for Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA broadband code division multiple access
  • GSM Global System for Mobile communication
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G 5th Generation
  • 6G 6th Generation
  • NR New Radio
  • the terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
  • the terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., this embodiment of the present application is not limited thereto.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the network device in the embodiment of the application may be a device used to communicate with terminal devices, and the network device may be a Global System for Mobile Communication (GSM) system or Code Division Multiple Access (CDMA)
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multiple Access
  • BTS Base Transceiver Station
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • WCDMA Wideband Code Division Multiple Access
  • Evolved evolved base station
  • NodeB eNB or eNodeB
  • it can also be a wireless controller in the cloud radio access network (Cloud Radio Access Network, CRAN) scenario
  • the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and the future
  • the network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.
  • FIG. 1 is a schematic diagram of a communication system 100 applicable to the solution of the embodiment of the present application.
  • the communication system 100 may include a network device 102 and terminal devices 104-114.
  • the network device 102 can be any device with a wireless transceiver function or a chip that can be installed in the device, and the device includes but is not limited to: base station (for example, base station NodeB, evolved base station eNodeB, fifth generation ( 5G) Network equipment in communication systems (such as transmission point (TP), transmission reception point (TRP), base station, small cell equipment, etc.), network equipment in future communication systems, wireless fidelity ( Wireless-Fidelity (WiFi) system access node, wireless relay node, wireless backhaul node, etc.
  • base station for example, base station NodeB, evolved base station eNodeB, fifth generation ( 5G) Network equipment in communication systems (such as transmission point (TP), transmission reception point (TRP), base station, small cell equipment, etc.), network equipment in future communication systems, wireless fidelity ( Wireless-Fidelity (WiFi) system access node, wireless relay node, wireless backhaul node, etc.
  • base station for example, base station NodeB, evolved base station
  • the network device 102 can communicate with multiple terminal devices (for example, the terminal devices 104-114 shown in the figure).
  • terminal equipment may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication Equipment, user agent, or user device.
  • the terminal device in the embodiments of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( The wireless terminal in transportation safety, the wireless terminal in the smart city, the wireless terminal in the smart home, and so on.
  • the embodiments of this application do not limit the application scenarios.
  • the aforementioned terminal device and the chip that can be installed in the aforementioned terminal device are collectively referred to as a terminal device.
  • the terminal device can also be a terminal device in the Internet of Things (IoT) system.
  • IoT is an important part of the development of information technology in the future. Its main technical feature is to pass items through communication technology. Connect with the network to realize the intelligent network of human-machine interconnection and interconnection of things.
  • the IoT technology can achieve massive connections, deep coverage, and power-saving terminals through, for example, Narrow Band (Narrow Band) NB technology.
  • the resources used in the NB technology only include one resource block (Resource Bloc, RB), that is, the bandwidth of the resources used in the NB technology is only 180 KB.
  • resource Bloc Resource Bloc
  • terminals must be discrete in access. According to the communication method of the embodiment of the present application, the congestion problem of massive IoT technology terminals when accessing the network through NB can be effectively solved.
  • the communication system 100 may be a public land mobile network (PLMN) network, a device to device (D2D) network, a machine to machine (M2M) network or other networks.
  • PLMN public land mobile network
  • D2D device to device
  • M2M machine to machine
  • FIG. 1 is only a simplified schematic diagram of an example for ease of understanding.
  • the communication system 100 may also include other network devices and terminal devices, which are not shown in FIG. 1.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (Memory Management Unit, MMU), and memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application.
  • the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (Digital Versatile Disc, DVD)) Etc.), smart cards and flash memory devices (for example, Erasable Programmable Read-Only Memory (EPROM), cards, sticks or key drives, etc.).
  • magnetic storage devices for example, hard disks, floppy disks, or tapes, etc.
  • optical disks for example, compact discs (CD), digital versatile discs (Digital Versatile Disc, DVD)
  • smart cards and flash memory devices for example, Erasable Programmable Read-Only Memory (EPROM), cards, sticks or key drives, etc.
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • multiple application programs can be run at the application layer.
  • the application program of the corresponding action may be a different application program.
  • an important aspect required for the evolution of mobile communications to the future 5G system or NR system is to support large bandwidth.
  • the bandwidth supported by the UE may be less than the carrier bandwidth.
  • the larger the bandwidth supported by the UE the stronger the processing capability of the UE, the higher the data transmission rate of the UE may be, and the higher the design cost of the UE may be.
  • the maximum carrier bandwidth may be 400 megahertz (MHz), and the radio frequency bandwidth capability of the UE may be 20MHz, 50MHz, or 100MHz.
  • the radio frequency bandwidth capabilities of different UEs may be the same or different.
  • a BWP includes several continuous physical resource blocks (PRBs) in the frequency domain. Different BWPs can define different bandwidths (different numbers of continuous PRBs), different frequency domain positions, or different subcarrier intervals Wait.
  • PRBs physical resource blocks
  • Reference signal can also be called pilot signal (Pilot Signal), which is provided by the transmitting device (or, also called the transmitting device or the transmitting end) to the receiving device for channel estimation, channel measurement, A known signal such as channel sounding or channel demodulation.
  • Pilot Signal Pilot Signal
  • the reference signal may be applied to the physical layer, and does not carry data information from a higher layer.
  • the reference signal may include a downlink reference signal.
  • the downlink reference signal includes a Cell-specific Reference Signal (CRS) used for downlink, a UE-specific Reference Signal (UE-RS) used for downlink, and a channel used for downlink Measured channel state information reference signal (channel state information-reference signal, CSI-RS), used for downlink group-specific reference signal (Group-specific Reference Signal, GRS), used for downlink positioning reference signal (Positioning RS, PRS) ), the beam reference signal (BRS) used for downlink, the beam refinement reference signal (BRRS) used for downlink, or the phase compensation reference signal (Phase compensation reference signal) used for downlink signal, PCRS) and so on.
  • the UE-RS used in the downlink also includes a demodulation reference signal (Demodulation Reference Signal, DMRS) used in the downlink.
  • DMRS demodulation Reference Signal
  • the reference signal in the embodiment of the present application can be used to demodulate the data.
  • the signal used for channel demodulation can be cited, for example, a demodulation reference signal (Demodulation Reference Signal, DMRS) or a common reference signal (Common Reference Signal, CRS), etc.
  • DMRS Demodulation Reference Signal
  • CRS Common Reference Signal
  • the channel to which the signal used for data channel demodulation (for example, the DMRS) is applicable (or the demodulated channel) may be a downlink channel (for example, a physical downlink shared channel ( physical downlink shared channel, PDSCH).
  • a downlink channel for example, a physical downlink shared channel ( physical downlink shared channel, PDSCH).
  • different reference signals may have different configurations (or configuration parameters).
  • the configuration parameter may include, but is not limited to, one or more of the following parameters.
  • Density (specifically, it is the density of the time-frequency resource carrying the reference signal in a time-frequency resource group)
  • each time-frequency resource group may include at least two time-frequency resources.
  • the time-frequency resource may be a resource element (Resource Element, RE).
  • the time-frequency resource group may be a Resource Element Group (REG).
  • the REG is used as a time-frequency resource group to describe in detail the method of sending and receiving the reference signal of the present application.
  • density may also be referred to as reference signal density, which may refer to the proportion of time-frequency resources (for example, RE) used to carry reference signals in a time-frequency resource group (for example, REG) .
  • B represents the number of time-frequency resources (e.g., RE) carrying reference signals in a time-frequency resource group (e.g., REG), and P represents the number of all time-frequency resources included in the time-frequency resource group.
  • RE time-frequency resources
  • P represents the number of all time-frequency resources included in the time-frequency resource group.
  • time-frequency resources listed above are only exemplary descriptions, and the present invention is not limited thereto.
  • the skilled in the art can arbitrarily define the time-frequency resources in any unit as needed. Accordingly, the time-frequency resources listed above are
  • the elements included in the frequency resource group may also define time-frequency resources in any form.
  • the time-frequency resource group may be defined as a time-frequency resource corresponding to a predetermined number of symbols in the time domain and a predetermined number of subcarriers in the frequency domain.
  • the reference signal density may also refer to, in a time-frequency resource group, the proportion of sub-carriers carrying the reference signal among all the sub-carriers included in the time-frequency resource group.
  • the reference signal density may also refer to the proportion of symbols carrying reference signals in all symbols included in the time-frequency resource group in a time-frequency resource group.
  • the different parameters of the two kinds of configuration information may mean that the reference signal density corresponding to one of the two kinds of configuration information is different from the reference signal density corresponding to the other of the two kinds of configuration information.
  • Parameter B Position (specifically, the position of the time-frequency resource carrying the reference signal in a time-frequency resource group)
  • location may also be referred to as a reference signal location, which may refer to the time-frequency resource (for example, RE) used to carry the reference signal in a time-frequency resource group (for example, REG).
  • time-frequency resource for example, RE
  • REG time-frequency resource group
  • the location in the resource is similar to the description for "density”.
  • the detailed description is omitted.
  • the time-frequency resource group can be defined as corresponding to a specified number of symbols in the time domain and corresponding to the frequency domain. Time-frequency resources of a specified number of sub-carriers.
  • the reference signal position may also refer to the frequency domain position of the subcarrier carrying the reference signal in all subcarriers included in the time-frequency resource group in a time-frequency resource group.
  • the reference signal density may also refer to the time-domain position of the symbol carrying the reference signal in all symbols included in the time-frequency resource group in a time-frequency resource group.
  • the different parameters of the two kinds of configuration information may indicate that the reference signal position corresponding to one of the two kinds of configuration information is different from the reference signal position corresponding to the other of the two kinds of configuration information.
  • Parameter C Sequence (specifically, the sequence used by the reference signal)
  • sequence may also be referred to as a reference signal sequence, and may refer to a sequence used by a reference signal.
  • the sequence used by the reference signal may include a pseudo-noise (PN) sequence.
  • PN pseudo-noise
  • the reference signal can be calculated by the following formula:
  • n 's n s .
  • c init_1 and c init_3 for determining the sequence of the reference signal on a symbol c init_2 reference signal sequence for determining a unit of time (e.g., subframes) on.
  • h represents the number of reference signals carried in each PRB, or in other words, h represents the number of resources (for example, REs) used to carry reference signals in each PRB.
  • the symbol may be an orthogonal frequency division multiplexing (OFDM) symbol, or may also be a symbol used to represent a time unit defined in a future protocol, which is not particularly limited in this application.
  • c is a PN sequence, which can be generated by a PN sequence generator (for example, a Gold sequence generator) according to the initialization sequence c init .
  • a PN sequence generator for example, a Gold sequence generator
  • the identification of the demodulation reference signal it can be the cell identification It can also be an identifier configured by a higher layer.
  • n RNTI is the identity of the UE.
  • the PN sequence includes Sequence elements, each sequence element is a complex signal, each sequence element can be called a value of the demodulation reference signal, The sequence elements can be called the sequence length
  • the difference in the parameters of the two kinds of configuration information may indicate that the sequence of the reference signal corresponding to one of the two kinds of configuration information is different from the sequence of the reference signal corresponding to the other of the two kinds of configuration information. different.
  • the sequence difference may refer to: the sequence length is different.
  • sequence difference may mean that when the pseudo-random sequence generator uses different initialization values during initialization, the generated pseudo-random sequences are different (even if the sequence lengths are the same).
  • Parameter D port (specifically, the antenna port corresponding to the reference signal)
  • the same network device can distinguish different antenna ports (antenna ports) through CDM, frequency division multiplexing (FDM), time division multiplexing (TDM) and other methods. If FDM or TDM is adopted, the frequency domain resources or time domain resources occupied by the reference signals of different antenna ports may be different. If CDM is adopted, the time-frequency resources occupied by reference signals of different antenna ports can be the same, and different antenna ports are distinguished by multiplexing codes.
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • CDM may include frequency domain CDM and time domain CDM.
  • the antenna port may also be referred to as a reference signal port, or, more specifically, it may be understood as a reference signal port that has not undergone beamforming precoding.
  • the reference signal is defined by the reference signal port, and each reference signal corresponds to an antenna port.
  • the difference in the parameters of the two types of configuration information may indicate that the antenna port corresponding to one of the two types of configuration information is different from the antenna port corresponding to the other of the two types of configuration information.
  • broadcast means that the access device (for example, the base station) sends the service to all possible receivers in the cell.
  • services can be sent to only a certain part of the receivers, which is called multicast or multicast.
  • Broadcast multicast services such as radio broadcast and TV broadcast multicast services, provide the same content to a large number of users in a large coverage area.
  • MBMS Multimedia Broadcast Multicast Service
  • MBMS supports the provision of multicast or broadcast networks in cellular systems, thereby Realize the simultaneous provision of multicast, broadcast and unicast services in a single network.
  • the MBMS is taken as an example to describe the transmission process of the broadcast multicast service of the present application.
  • FIG. 2 is a schematic interaction diagram of an example of the communication method of the present application.
  • FIG. 2 shows a transmission process of a broadcast and multicast service between a network device and multiple terminal devices, where the actions of the multiple terminal devices are similar
  • the process of the terminal device #A is used to describe the process of the communication method of the present application.
  • the network device may determine the transmission parameter of MBMS#A (that is, an example of the first broadcast-multicast service) (that is, an example of the first semi-persistent scheduling parameter), which is recorded as transmission parameter #A.
  • SPS resources are time-frequency resources that appear periodically, and one SPS resource can be called an SPS opportunity (Occasion).
  • an SPS resource includes m PRBs and n consecutive time units (such as slot, Mini-Slot, or symbol), then these m PRBs and n time units constitute an SPS opportunity, m, n are An integer greater than or equal to 1.
  • the SPS period can be considered as the interval between two SPS opportunities belonging to the same SPS configuration.
  • the terminal device can calculate the time position of the SPS resource, such as the start time, according to the SPS period.
  • the size and/or position of the SPS period (such as time domain offset) can be used as one of the transmission parameters #A.
  • the transmission parameter #A may be a transmission parameter used by the network device in the semi-persistent scheduling (Semi-Persistent Scheduling, SPS) validity period #A.
  • SPS semi-persistent Scheduling
  • the effective period (or effective time period) of the transmission parameter #A is the SPS effective period #A.
  • the configuration of the transmission parameter #A mentioned above may take effect immediately after the configuration (in other words, after the terminal device receives the information of the transmission parameter #A), and become invalid after the configuration is deleted. Then, the time period between the configuration and the deletion of the configuration belongs to the SPS validity period. Or, after the SPS configuration is configured, it can take effect through the activation process, and it becomes invalid after deactivation. Then, the time period between activation and deactivation is the validity period of the SPS. Multiple SPS periods can be included in the SPS validity period, that is, multiple SPS opportunities are included.
  • the network device may notify the terminal device (for example, one or more terminal devices that need to receive the MBMS#A, for example, terminal device #A) through the sixth information in advance of the size of the SPS validity period #A (or the validity period duration) ) And/or location (for example, the start time and/or end time in the time domain).
  • the terminal device for example, one or more terminal devices that need to receive the MBMS#A, for example, terminal device #A
  • the sixth information in advance of the size of the SPS validity period #A (or the validity period duration)
  • location for example, the start time and/or end time in the time domain.
  • the size and/or location (such as a time domain offset) of the SPS validity period #A may be used as one of the transmission parameters in the transmission parameter #A.
  • the SPS validity period #A may include the SPS period (or SPS time) in which the transmission time of the transmission parameter #A is located, and the following N SPS periods, where N is a positive integer greater than or equal to zero.
  • the SPS validity period #A may include the t-th period after the SPS period in which the transmission time of the transmission parameter #A is located, where t is an integer greater than or equal to 1, and the following N SPS periods, where N is A positive integer greater than or equal to 0.
  • the value of t may be pre-indicated by the network device.
  • the value of t may be predetermined by the communication system or communication protocol, which is not specifically limited in this application.
  • the transmission parameter may also be referred to as a wireless air interface configuration parameter.
  • the transmission parameter may include, but is not limited to, one or more of the following parameters:
  • the time-frequency resource used to carry the MBMS#A is, the time-frequency resource used to carry the MBMS#A.
  • time-frequency resources may include resources in the time domain and/or resources in the frequency domain.
  • the time-frequency resource may include one or more time domain units (or, it may also be referred to as a time unit), and in the frequency domain, the time-frequency resource may include frequency domain units.
  • a time domain unit (also called a time unit) can be a symbol or several symbols, or a mini-slot, or a slot, or a subframe, Among them, the duration of a subframe in the time domain can be 1 millisecond (ms), a slot consists of 7 or 14 symbols, and a mini slot can include at least one symbol (for example, 2 symbols or 7 symbols). Symbol or 14 symbols, or any number of symbols less than or equal to 14 symbols).
  • the above-mentioned time-domain unit sizes are only for the convenience of understanding the solutions of the embodiments of the present application, and should not be understood as limiting the present invention. It should be understood that the above-mentioned time-domain unit sizes may be other values, which are not limited in the embodiments of the present application.
  • a frequency domain unit may be a resource block (resource block, RB), or a resource block group (resource block group, RBG), or a predefined subband (subband).
  • the manner in which the transmission parameter #A includes the downlink time-frequency resource #A is only an exemplary description, and this application is not limited to this.
  • the devices reach an agreement on the downlink time-frequency resource #A.
  • Identification information used to indicate whether to use the retransmission mechanism (recorded as, identification information #A)
  • the network device can use a retransmission mechanism to transmit the MBMS#A, that is, the network device transmits part or all of the MBMS#A data multiple times.
  • the network device may not use a retransmission mechanism to broadcast the MBMS#A, that is, the network device only transmits the MBMS#A once.
  • the manner in which the transmission parameter #A includes the identification information #A is only an exemplary description, and the present application is not limited to this. Agree on whether to adopt the retransmission mechanism.
  • retransmission methods can include but are not limited to:
  • Retransmission based on feedback that is, after the network device sends the service for the first time, it needs to determine whether to retransmit the service according to the feedback of the terminal device.
  • blind retransmission that is, the network device repeatedly transmits m times for each service.
  • the value of m may be specified by the communication system or communication protocol, or the value of m may also be indicated by the network device.
  • a request for adjusting the value of m can be fed back to the network device through, for example, a Physical Random Access Channel (PRACH).
  • PRACH Physical Random Access Channel
  • identification information #2 can be configured for each broadcast and multicast service.
  • message 1 or message 3 it can be considered that the value of m needs to be increased (or decreased).
  • the message 1 in the random access process carries identification information #2, it can be defined as a special PRACH resource (a specific preamble code, or a specific PRACH time-frequency resource) corresponding to the identification information #2, when the network device is in the above-mentioned specific RPACH When the random access request of the terminal device is received on the resource, it is considered that the identification information #2 has been received.
  • two dedicated identification information can be configured for each broadcast and multicast service, one of which indicates that the value of m needs to be increased, and the other needs to be reduced.
  • the specific usage is similar to the usage of identification information #2, and will not be repeated here.
  • the value to be increased or decreased each time may be specified by the communication system or communication protocol, or may be instructed in advance by the network device, which is not specifically limited in this application.
  • the transmission parameter #A may also include the feedback mode used when transmitting the MBMS#A (denoted as feedback mode #A).
  • the feedback mode #A may include, but is not limited to, any of the following feedback modes:
  • the terminal device only feeds back the NACK when the service is incorrectly received, and does not perform the feedback when the service is accurately received, so that the network device repeats the transmission of the service after receiving the NACK.
  • the resources used to send NACK may be different, and the maximum number of feedback NACKs may be different.
  • the terminal device feeds back the NACK when it does not receive the service correctly, and feeds back the ACK when it receives the service accurately, so that the network device repeats the transmission of the service after receiving the NACK.
  • time-frequency resource used to carry ACK and the resource used to carry NACK may be different.
  • the resources used to send ACK or NACK may be different.
  • NACK feedback resources can be configured for users in the cell center and users at the edge of the cell, so that the network device can distinguish the amount of NACK feedback from users in the cell center and the amount of NACK feedback from users at the cell edge from different NACK feedback resources. quantity.
  • the network equipment can use unicast to resend the broadcast and multicast data to the users at the edge of the cell; otherwise, if The amount of NACK feedback from users in the cell center is also relatively large.
  • the network can continue to use broadcast-multicast to resend the broadcast-multicast data, or increase the number of repetitions during a retransmission, for example, the initial transmission
  • the number of repetitions can be X
  • the number of repetitions in the first retransmission can be X+Y
  • the number of repetitions in the second retransmission can be X+Z, where X ⁇ 1 and Z>Y.
  • a certain threshold T can be set. For example, if the number of NACKs fed back by the terminal device exceeds the threshold T, or the energy of the NACK detected by the network device is higher than the threshold T, the network device will retransmit, or determine whether to perform unicast retransmission or broadcast multicast retransmission according to the threshold T. pass.
  • the transmission parameter #A may also include time-frequency resources used when transmitting feedback information.
  • the resource used by the terminal device to feed back the ACK is different from the resource used to feed back the NACK, so that the network device can receive the feedback information.
  • MCS Modulation and Coding Scheme
  • Hybrid Automatic Repeat Request Hybrid Automatic Repeat Request, HARQ
  • the transmission parameter #A may also include at least one of the number of HARQ processes used in the retransmission, the redundancy version RV, the number of retransmissions, and other parameters.
  • the parameters included in the transmission parameter #A listed above are only exemplary descriptions, and the application is not limited thereto.
  • the transmission parameter #A may also include, but is not limited to, waveform parameters, modulation methods, multiple access methods, One or more parameters of bandwidth configuration, wireless frame configuration mode, resource multiplexing mode, user scheduling mode, channel configuration mode encoding mode, and protocol stack configuration mode.
  • Waveform parameters refer to parameters that can indicate or determine a waveform.
  • the waveform parameter may include at least one of the following parameters: the waveform parameter used in Orthogonal Frequency Division Multiplexing (OFDM) technology; Single-carrier Frequency Division Multiple Access (SC-OFDM, Single-carrier Frequency- Waveform parameters used in Division Multiple Access; Waveform parameters used in filter OFDM (filter Orthogonal Frequency Division Multiplexing) technology; Universal Filtered Multi-Carrier (UFMC, Universal Filtered Multi-Carrier) technology Waveform parameters used in FBMC (Filter Bank Multicarrier) technology; Waveform parameters used in GFDM (Generalized Frequency Division Multiple-plex) technology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-OFDM Single-carrier Frequency- Waveform parameters used in Division Multiple Access
  • Waveform parameters used in filter OFDM filter Orthogonal Frequency Division Multiplexing
  • UMC Universal Filtered Multi-Carrier
  • FBMC Breast Bank Multicarrier
  • Waveform parameters used in GFDM Generalized Frequency Division Multiple-plex
  • modulation In communication technology, in order to ensure the communication effect and overcome the problems in long-distance signal transmission, it is necessary to move the signal spectrum to a high-frequency channel for transmission through modulation. This process of loading the signal to be sent onto a high-frequency signal is called modulation.
  • the modulation method may include at least one of the following methods: amplitude shift keying (ASK, Amplitudc Shift Keying) modulation; phase shift keying (PSK, Phase Shift Keying) modulation; frequency shift keying FSK (Frequency Shift Keying) modulation; Quadrature Amplitude Modulation (QAM, Quadrature Amplitude Modulation) modulation; Minimum Frequency Shift Keying (MSK, Minimum Shift Keying) modulation; Gaussian Filtered Minimum Shift Keying (GMSK, Gaussian Filtered Minimum Shift) Keying) modulation;
  • ASK amplitude shift keying
  • PSK Phase Shift Keying
  • FSK Frequency Shift Keying
  • QAM Quadrature Amplitude Modulation
  • MSK Minimum Shift Keying
  • GMSK Gaussian Filtered Minimum Shift Keying
  • the bandwidth configuration may refer to the use width of the frequency domain resources required by the air interface.
  • the bandwidth configuration corresponding to the broadband transmission service may refer to the minimum frequency domain resource width required by the air interface, or Speaking of the number of subcarriers; the bandwidth configuration corresponding to the narrowband transmission service can refer to the maximum frequency domain resource width required by the air interface, or the number of subcarriers.
  • the radio frame configuration mode can include but is not limited: subcarrier spacing; symbol length; cyclic prefix (CP, Cyclic Prefix); duplex mode, for example, can be divided into full duplex, half duplex (including half It should be noted that in some air interfaces, the duplex mode can be fixed or can be flexibly changed.
  • the present invention is not particularly limited; the transmission time interval (TTI, Transmission Time Interval) length. It should be noted that in some air interfaces, the transmission time interval can be a fixed value or can be flexibly changed, which is not particularly limited in the present invention; the length of the radio frame and the radio subframe.
  • TTI Transmission Time Interval
  • the resource multiplexing method may include at least one of the following methods: Frequency Division Multiplexing (FDM), that is, dividing the total bandwidth used for the transmission channel into several sub-bands (Or sub-channel), each sub-channel transmits 1 signal.
  • FDM Frequency Division Multiplexing
  • Frequency division multiplexing requires that the total frequency width is greater than the sum of the frequencies of the sub-channels.
  • an isolation band should be set up between the sub-channels, so as to ensure the mutual signal of each channel.
  • Time Division Multiplexing (TDM, Time Division Multiplexing), that is, using the same physical connection to transmit different signals at different time periods, which can also achieve the purpose of multiplexing.
  • Time division multiplexing uses time as the signal division parameter, so the signals of each channel must not overlap each other on the time axis.
  • Time division multiplexing is to divide the time provided for the entire channel to transmit information into several time slices (slots for short), and allocate these time slots to each signal source; Space Division Multiplexing (SDM), namely , Allowing the same frequency band to be reused in different spaces.
  • SDM Space Division Multiplexing
  • the basic technology to achieve space division is to use adaptive array antennas to form different beams in different user directions.
  • CDMA Code Division Multiplexing
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • SCDMA Synchronous Code Division Multiple Access
  • Encoding is a conversion of source symbols for the purpose of improving the effectiveness of communication, or to reduce or eliminate source margins. Specifically, it is to find a certain method according to the statistical characteristics of the source output symbol sequence to transform the source output symbol sequence into the shortest codeword sequence, so that the average amount of information carried by each symbol of the latter is maximized, and at the same time The original symbol sequence can be restored without distortion.
  • encoding methods can be listed: Polar Code; Turbo Code; Convolution Code.
  • Protocol Stack refers to the sum of various layer protocols in the network, which vividly reflects the process of file transfer in a network: from the upper layer protocol to the lower layer protocol, and then from the bottom layer protocol to the upper layer protocol.
  • the protocol stack used for wireless communication may include at least one of the following protocol layers or a combination of multiple protocol layers, and each layer of the protocol may have multiple protocol entities: Packet Data Convergence Protocol (PDCP) , Packet Data Convergence Protocol layer; Radio Link Control (RLC, Radio Link Control) layer; Media Access Control (MAC, Media Access Control) layer; Physical (Physical) layer; Radio Resource Management (RRC, Radio Resource Control) Layers are different from multiplexing.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Media Access Control
  • Physical Physical (Physical) layer
  • Radio Resource Management (RRC, Radio Resource Control) Layers are different from multiplexing.
  • Multiple access technology does not require all channels of information to be gathered together. Instead, they are modulated and sent to the channel respectively, and the required information obtained through modulation is removed from the channel as an example.
  • the multiple access methods used in wireless communication may include at least one of the following: FDMA; TDMA; CDMA; SCMA; Non-Orthogonal Multiple Access (NOMA, Non Orthogonal Multiple Access); Multi-user shared access (MUSA, multi-user shared access).
  • the network device may record the instruction information for indicating the transmission parameter #A as information #A (that is, an example of the first information) and send it to the terminal device that needs to receive the MBMS#A, for example, terminal device #A .
  • the information #A can be sent in any of the following ways.
  • the network device may send the information #A in a broadcast or multicast manner.
  • the network device may carry the information #A in a broadcast message (noted as broadcast message #A).
  • the broadcast message #A may also carry the identifier of the MBMS#A.
  • the identifier of the MBMS#A may include, but is not limited to, a group radio network temporary identity (Group Radio Network Temporary Identity, G-RNTI) allocated by the network device for the MBMS#A.
  • G-RNTI Group Radio Network Temporary Identity
  • the terminal device #A can determine, based on the identifier of the MBMS#A, that the transmission parameter #A needs to be used to receive the MBMS#A within the SPS validity period #A.
  • the network device can send the message #A in unicast mode.
  • the terminal device #A may be a middle terminal device in a connected state, so that the network device can send the information #A through the communication link with the terminal device #A.
  • the terminal device after receiving the transmission parameter #A, the terminal device needs to know how to use the parameter #A. For example, if the transmission parameter #A defines an SPS resource, then the terminal device, after receiving the data from the SPS resource, needs to know which logical channel to put the data into for processing, for example, the MAC layer gets a data from the physical layer Packet, the data packet comes from an SPS resource, then the MAC layer needs to know which logical channel to put the data packet into for processing. Therefore, the terminal device needs to associate SPS resources with one or more logical channels, or associate one or more SPS resources with one logical channel. The above-mentioned association relationship may be network-configured.
  • the transmission parameter #A contains logical channel information, or the transmission parameter #A contains broadcast and multicast information (for example, the identifier of the broadcast and multicast, the G-RNTI of the broadcast and multicast, the DMRS of the broadcast and multicast, etc.), Then the UE autonomously transmits the data packet from the SPS resource to the corresponding logical channel according to the broadcast and multicast information contained in the transmission parameter #A. In other words, the UE autonomously completes the mapping or association between the broadcast and multicast service and the logical channel, and the network only needs to configure the mapping or association relationship between the SPS resource and the broadcast and multicast service.
  • the above SPS resource is just an example, and the above description is applicable to other parameters included in parameter parameter #A.
  • the network device may send (or broadcast) MBMS#A based on the transmission parameter #A within the SPS validity period #A.
  • the terminal device #A can receive the MBMS#A based on the transmission parameter #A within the SPS validity period #A.
  • Fig. 4 is a schematic interaction diagram of another example of the communication method of the present application.
  • the difference from the process shown in Fig. 2 is that in the process shown in Fig. 4, in the SPS validity period #A, a plurality of The MBMS can share the transmission parameter #A, or in other words, the network device and the terminal device #A can transmit multiple MBMS based on the transmission parameter #A within the SPS validity period #A.
  • the network device when the network device needs to send MBMS#A based on the transmission parameter #A within the SPS validity period #A, it can send a reference signal corresponding to the MBMS#A (denoted as reference signal #A).
  • multiple reference signals and multiple MBMS have a one-to-one correspondence relationship.
  • Table 1 shows an example of the correspondence relationship. .
  • any two of the reference signals #A to reference signal #N shown in Table 1 include at least one different reference signal parameter, for example, a reference signal sequence.
  • each reference signal can be used for the transmission of the corresponding MBMS, for example, for demodulating the corresponding MBMS.
  • each reference signal can be used as the DMRS of the corresponding MBMS (specifically, MBMS data).
  • the network device when the network device transmits (or broadcasts) MBMS#A based on the transmission parameter #A within the SPS validity period #A, it needs to transmit a reference signal corresponding to the MBMS#A (ie, reference signal #A) DMRS as the data of this MBMS#A.
  • a reference signal corresponding to the MBMS#A ie, reference signal #A
  • FIG. 5 is a schematic interaction diagram of another example of the communication method of the present application.
  • the SPS validity period #A includes MBMS#A.
  • a plurality of MBMSs in the SPS can share a plurality of HARQ processes, or in other words, the terminal device #A can transmit a plurality of MBMSs based on a group of HARQ processes within the SPS validity period #A.
  • the network device when the network device needs to send MBMS#A within the SPS validity period #A, it can send a reference signal (denoted as, Reference signal #A).
  • Reference signal index HARQ process index Reference signal #A HARQ process#A Reference signal #B HARQ process #B ... ... Reference signal #N HARQ process #N
  • any two reference signals of reference signal #A to reference signal #N shown in Table 2 include at least one different reference signal parameter, for example, a reference signal sequence.
  • the terminal device can adopt the HARQ process (ie, HARQ process #A) corresponding to the reference signal #A, the MBMS#A.
  • Reference signal index HARQ process index MBMS index Reference signal #A HARQ process#A MBMS#A Reference signal #B HARQ process #B MBMS#B ... ... ... Reference signal #N HARQ process #N MBMS#N
  • Fig. 6 is a schematic interaction diagram of another example of the communication method of the present application.
  • the difference from the process shown in Figs. 2 to 5 is that in the process shown in Fig. 6, the message #A contains the transmission parameter #A in Multiple (or multiple sets) of transmission parameters within, that is, within the SPS validity period #A, the network device can use multiple sets of transmission parameters to send broadcast and multicast services.
  • the network device when the network device needs to use the transmission parameter #A to send the broadcast multicast service within the SPS validity period #A, it can send a reference signal corresponding to the transmission parameter #A used to transmit the transmission parameter #A (denoted as reference signal #A) .
  • Reference signal index Transmission parameter index Reference signal #A Transmission parameters#A Reference signal #B Transmission parameters#B ... ... Reference signal #N Transmission parameters#N
  • any two of the reference signals #A to reference signal #N shown in Table 4 include at least one different reference signal parameter, for example, a reference signal sequence.
  • the terminal device can use the transmission parameter corresponding to the reference signal #A (that is, the transmission parameter #A) to transmit the MBMS#A.
  • Table 4 or Table 5 may be pre-defined by the communication system or communication protocol, or may also be determined by the network device and issued to the terminal device, which is not particularly limited in this application.
  • Fig. 7 is a schematic interaction diagram of another example of the communication method of the present application.
  • the difference from the process shown in Fig. 2 to Fig. 6 is that in the process shown in Fig. 7, the network device can also instruct to transmit MBMS based on the transmission parameter #A
  • the BWP used in #A (denoted as BWP#A).
  • the arrangement order of the multiple BWPs (an example of the first arrangement order) can be pre-defined (for example, communication system or communication protocol regulation, or pre-instructed by the network device).
  • the network device can send trigger information (that is, an example of the third information), so that the terminal device can determine the effective BWP (that is, used to carry the broadcast multiple BWP for broadcasting services).
  • the terminal device may be located in the BWP# indicated by the above arrangement sequence.
  • the broadcast multicast service ie, MBMS#A
  • BWP#A the BWP#A after (or before) X.
  • the arrangement order of the multiple BWPs may be BWP#1, BWP#2, BWP#3, BWP#4, BWP#5, BWP#6.
  • BWP#3 an example of the second BWP
  • BWP#4 an example of the first BWP
  • BWP#6 when the trigger information is received, it can switch to BWP#1 to receive MBMS#A.
  • the trigger information may indicate to use the switched BWP within a period of time (an example of the first semi-persistent scheduling period).
  • the period of time may include one SPS period or multiple SPS periods. It can be configured by the network side or specified by the protocol.
  • the period of time includes the semi-persistent scheduling period at which the third information is sent and the next N SPS periods, or the first semi-persistent scheduling period includes the sending of the third information.
  • the k-th semi-persistent scheduling period after the semi-persistent scheduling period in which the time is in, and the following N SPS periods, k ⁇ 1, and N is an integer greater than or equal to 0.
  • the value of k and/or N may be pre-defined by the communication system or communication protocol, or the value of k and/or N may also be pre-indicated by the network device.
  • the terminal device can switch to the new BWP according to the new trigger information.
  • the terminal device may switch to a different BWP after receiving different trigger information.
  • the trigger information may be a reference signal, and different trigger information may be different reference signals.
  • FIG. 8 is a schematic interaction diagram of another example of the communication method of the present application. The difference from the process shown in FIG. 7 is that in the solution shown in FIG. 8, multiple BWPs have a one-to-one correspondence with multiple identification information.
  • the identification information may include, but is not limited to, a BWP index or a reference signal.
  • the network device may send the identification information corresponding to the BWP#A to the terminal device, which is recorded as identification information #B.
  • the terminal device can determine that it needs to receive MBMS#A on BWP#A corresponding to the identification information #B based on the identification information #B.
  • Table 6 below shows the correspondence between multiple BWPs and multiple reference signals (ie, an example of identification information).
  • any two of the reference signals #A to reference signal #N shown in Table 6 include at least one different reference signal parameter, for example, a reference signal sequence.
  • the terminal device can use the BWP (ie, BWP#A) corresponding to the reference signal #A to transmit the MBMS#A.
  • the trigger information may indicate to use the switched BWP within a period of time (an example of the first semi-persistent scheduling period).
  • the period of time may include one SPS period or multiple SPS periods. It can be configured by the network side or specified by the protocol.
  • the terminal device can switch to the new BWP according to the new trigger information.
  • the terminal device When the terminal device receives different trigger information, it can switch to a different BWP.
  • Table 6 or Table 7 may be pre-defined by the communication system or communication protocol, or may also be determined by the network device and issued to the terminal device, which is not specifically limited in this application.
  • the identification information is a BWP index
  • the data packet of MBMS#A or MAC CE may be used to carry the index of BWP#A.
  • FIG. 9 is a schematic diagram of a communication device 300 provided in an embodiment of this application.
  • the apparatus 300 may be a network device, or a chip or circuit, for example, a chip or circuit that can be provided in a network device.
  • the apparatus 300 may include a processing unit 310 (ie, an example of a processing unit), and optionally, may also include a storage unit 320.
  • the storage unit 320 is used to store instructions.
  • the processing unit 310 is configured to execute the instructions stored in the storage unit 320, so that the apparatus 300 implements the steps performed by the network device in the foregoing method.
  • the device 300 may also include an input port 330 (ie, an example of a communication unit) and an output port 340 (ie, another example of a transceiver unit).
  • the processing unit 310, the storage unit 320, the input port 330, and the output port 340 can communicate with each other through internal connection paths to transfer control and/or data signals.
  • the storage unit 320 is used to store a computer program, and the processing unit 310 can be used to call and run the computer program from the storage unit 320 to complete the steps of the network device in the above method.
  • the storage unit 320 may be integrated in the processing unit 310, or may be provided separately from the processing unit 310.
  • the input port 330 may be a receiver
  • the output port 340 may be a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 330 is an input interface
  • the output port 340 is an output interface
  • the functions of the input port 330 and the output port 340 may be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • the processing unit 310 may be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.
  • a general-purpose computer may be considered to implement the network device provided in the embodiment of the present application.
  • the program codes that realize the functions of the processing unit 310, the input port 330, and the output port 340 are stored in the storage unit 320.
  • the general processing unit implements the functions of the processing unit 310, the input port 330 and the output port 340 by executing the code in the storage unit 320. .
  • the functions and actions of the modules or units in the apparatus 300 listed above are only exemplary.
  • the modules or units in the apparatus 300 can be used to execute the above methods. Actions or processes performed by network devices.
  • detailed descriptions are omitted.
  • the structure of the base station is as shown in FIG. 10. That is, the base station includes part 410 and part 420.
  • the 410 part is mainly used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals; the 420 part is mainly used for baseband processing and control of the base station.
  • the part 410 can generally be referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver.
  • the part 420 is usually the control center of the base station, and may generally be referred to as a processing unit, which is used to control the base station to perform the processing operations on the network device side in the foregoing method embodiments.
  • the transceiver unit of part 410 may also be called a transceiver or a transceiver, etc., which includes an antenna and a radio frequency circuit, and the radio frequency circuit is mainly used for radio frequency processing.
  • the device used for realizing the receiving function in part 410 can be regarded as the receiving unit, and the device used for realizing the sending function can be regarded as the sending unit, that is, the part 410 includes the receiving unit and the sending unit.
  • the receiving unit may also be called a receiver, a receiver, or a receiving circuit, and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • Part 420 may include one or more single boards, and each single board may include one or more processors and one or more memories.
  • the processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processing at the same time. Device.
  • the transceiving unit in part 410 is used to execute the steps related to receiving and sending in the embodiment performed by the base station; the part 420 is used to execute the steps related to processing performed by the base station.
  • FIG. 10 is only an example and not a limitation, and the foregoing network device including a transceiver unit and a processing unit may not rely on the structure shown in FIG. 10.
  • the chip When the communication device 300 is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface;
  • the processing unit is a processor, microprocessor, or integrated circuit integrated on the chip.
  • the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output
  • the circuit can be a different circuit or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.
  • FIG. 11 is a schematic diagram of a communication device 500 provided in an embodiment of this application.
  • the apparatus 500 may be a terminal device, or a chip or circuit, for example, a chip or circuit that can be provided in a terminal device.
  • the device 500 may include a processing unit 510 (that is, an example of a processing unit), and optionally, may also include a storage unit 520.
  • the storage unit 520 is used to store instructions.
  • the processing unit 510 is configured to execute the instructions stored in the storage unit 520, so that the apparatus 500 implements the steps performed by the terminal device in the foregoing method.
  • the device 500 may further include an input port 530 (ie, an example of a communication unit) and an output port 550 (ie, another example of a transceiver unit).
  • the processing unit 510, the storage unit 520, the input port 530, and the output port 550 can communicate with each other through internal connection paths to transfer control and/or data signals.
  • the storage unit 520 is used to store a computer program, and the processing unit 510 can be used to call and run the calculation program from the storage unit 520 to complete the steps of the terminal device in the foregoing method.
  • the storage unit 520 may be integrated in the processing unit 510, or may be provided separately from the processing unit 510.
  • the input port 530 may be a receiver
  • the output port 550 may be a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 530 is an input interface
  • the output port 550 is an output interface
  • the functions of the input port 530 and the output port 550 may be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • the processing unit 510 may be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.
  • a general-purpose computer may be considered to implement the terminal device provided in the embodiment of the present application.
  • the program codes that realize the functions of the processing unit 510, the input port 530, and the output port 550 are stored in the storage unit 520.
  • the general processing unit implements the functions of the processing unit 510, the input port 530 and the output port 550 by executing the code in the storage unit 520. .
  • each module or unit in the apparatus 500 can be used to execute the above methods.
  • Each action or process performed by the terminal device for example, terminal device #A.
  • terminal device #A for example, terminal device #A
  • FIG. 12 is a schematic structural diagram of a terminal device 600 provided by this application.
  • the foregoing apparatus 500 may be configured in the terminal device 600, or the foregoing apparatus 500 itself may be the terminal device 600.
  • the terminal device 600 can execute the actions performed by the terminal device (for example, terminal device #A) in the above method.
  • FIG. 12 only shows the main components of the terminal device.
  • the terminal device 600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program. For example, it is used to support the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment.
  • the memory is mainly used to store software programs and data, for example, the codebook described in the above embodiments.
  • the control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 12 only shows a memory and a processor. In an actual terminal device, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. data.
  • the processor in FIG. 12 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors and are interconnected by technologies such as a bus.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and the communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and the control circuit with the transceiving function may be regarded as the transceiving unit 610 of the terminal device 600, and the processor with the processing function may be regarded as the processing unit 620 of the terminal device 600.
  • the terminal device 600 includes a transceiving unit 610 and a processing unit 620.
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on.
  • the device for implementing the receiving function in the transceiving unit 610 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 610 as the sending unit, that is, the transceiving unit includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the embodiment of the present application also provides a communication system, which includes one or more of the aforementioned terminal devices and network devices.
  • the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
  • the above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination.
  • the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions or computer programs.
  • computer instructions or computer programs When computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
  • the semiconductor medium may be a solid state drive.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

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

Abstract

La présente invention, qui s'applique au domaine technique de la diffusion ou de la multidiffusion, concerne un procédé de communication et un appareil de communication. Le procédé de communication comprend : la réception de premières informations, les premières informations étant utilisées pour indiquer un premier paramètre de planification semi-persistante d'un premier service diffusion multidiffusion ; et la réception du premier service diffusion multidiffusion selon le premier paramètre de planification semi-persistante. Un dispositif de réseau envoie un paramètre de planification semi-persistante pour un service diffusion multidiffusion, et un dispositif de terminal reçoit le service diffusion multidiffusion sur la base du paramètre de planification semi-persistante au cours d'une période de planification semi-persistante. Dans un cas dans lequel le service diffusion multidiffusion doit être envoyé de multiples fois au cours de la période semi-persistante, il n'est pas nécessaire d'envoyer à maintes reprises des informations de planification, ce qui réduit le surdébit de ressources et le retard de communication du service diffusion multidiffusion.
PCT/CN2021/089694 2020-05-09 2021-04-25 Procédé de communication et appareil de communication WO2021227849A1 (fr)

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