WO2022012170A1 - 一种广播组播传输方式的切换方法、终端及基站 - Google Patents

一种广播组播传输方式的切换方法、终端及基站 Download PDF

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Publication number
WO2022012170A1
WO2022012170A1 PCT/CN2021/095656 CN2021095656W WO2022012170A1 WO 2022012170 A1 WO2022012170 A1 WO 2022012170A1 CN 2021095656 W CN2021095656 W CN 2021095656W WO 2022012170 A1 WO2022012170 A1 WO 2022012170A1
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Prior art keywords
transmission mode
broadcast
target transmission
indication information
terminal
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English (en)
French (fr)
Inventor
王俊伟
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a method, terminal and base station for switching a broadcast multicast transmission mode.
  • the 5th generation mobile networks (5G) network needs to have the ability to flexibly and dynamically allocate wireless spectrum and network resources between unicast services and multicast services, and needs to support independent deployment of broadcast/multicast networks.
  • the base station sends two types of data, one is terminal-oriented data, which can only be received by the target terminal, and this data becomes unicast data; the other is for all terminals in the cell or specific Data of the group, that is, all users in the cell or users of a specific group can receive the service.
  • the PTP mode means that the sending node (base station) transmits data based on a single terminal, that is, the scheduling signaling and the corresponding scheduling data are carried out for one terminal; the feature of this method is that the base station can adjust the data according to the channel conditions of the terminal.
  • the PTM method means that the sending node transmits data based on multiple terminals, that is, the scheduling signaling and the corresponding scheduling data are carried out for a group of terminals; When the number of receiving terminals is large, it is beneficial to save air interface resources.
  • Embodiments of the present disclosure provide a method, terminal, and base station for switching a broadcast multicast transmission mode, so as to quickly indicate the transmission mode of the broadcast multicast service.
  • An embodiment of the present disclosure provides a method for switching a broadcast multicast transmission mode, which is applied to a terminal, including:
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode
  • the acquisition method of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH, Obtain the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtain the target transmission mode through a preset timer.
  • An embodiment of the present disclosure provides a method for switching a broadcast multicast transmission mode, which is applied to a base station, including:
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode
  • the method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through the downlink control information DCI, and sending the target transmission mode to the terminal through the multicast control channel MCCH.
  • the terminal sends the target transmission mode to the terminal through the medium access control-control unit MAC-CE.
  • An embodiment of the present disclosure provides a device for switching a broadcast multicast transmission mode, which is applied to a terminal, including:
  • an acquisition module used for acquiring the target transmission mode of the broadcast multicast service, and acquiring the configuration information of the target transmission mode
  • a receiving module configured to receive the broadcast multicast service based on the configuration information of the target transmission mode
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode
  • the acquisition method of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH, Obtain the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtain the target transmission mode through a preset timer.
  • An embodiment of the present disclosure provides a switching device for a broadcast multicast transmission mode, which is applied to a base station, including:
  • the sending module is configured to send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the target transmission mode based on the configuration information of the target transmission mode.
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode
  • the method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through the downlink control information DCI, and sending the target transmission mode to the terminal through the multicast control channel MCCH.
  • the terminal sends the target transmission mode to the terminal through the medium access control-control unit MAC-CE.
  • An embodiment of the present disclosure provides a terminal, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements a broadcast multicast transmission method applied to the terminal when the processor executes the computer program The steps of the switching method.
  • An embodiment of the present disclosure provides a base station, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements a broadcast multicast transmission method applied to the base station when the processor executes the computer program The steps of the switching method.
  • Embodiments of the present disclosure provide a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of the method for switching the broadcast-multicast transmission mode.
  • the method, terminal, and base station for switching the broadcast multicast transmission mode acquire the target transmission mode of the broadcast multicast service by adopting DCI, MCCH, MAC-CE, or a preset timer, that is, performing PTM.
  • the switching of the /PTP mode makes the switching of the transmission mode of the broadcast multicast service more flexible, realizes the effective and rapid indication of the change of the transmission mode, avoids the waste of air interface resources, and effectively saves the air interface resources.
  • FIG. 1 is a flowchart of steps of a method for switching a broadcast multicast service transmission mode applied to a terminal in an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of indicating a target transmission mode of multiple broadcast multicast services through a bitmap in an embodiment of the present disclosure
  • FIG. 3 is one of the schematic diagrams of the target transmission modes of grouping indicating multiple broadcast multicast services in an embodiment of the present disclosure
  • FIG. 4 is the second schematic diagram of the target transmission mode of grouping indicating multiple broadcast multicast services in an embodiment of the present disclosure
  • FIG. 5 is a flowchart of steps of a method for switching a broadcast multicast service transmission mode applied to a base station in an embodiment of the disclosure
  • FIG. 6 is a block diagram of a module of an apparatus for switching a broadcast multicast service transmission mode applied to a terminal in an embodiment of the present disclosure
  • FIG. 7 is a block diagram of a module of an apparatus for switching a transmission mode of a broadcast multicast service applied to a base station in an embodiment of the present disclosure
  • FIG. 8 is a schematic structural diagram of a terminal in an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a base station in an embodiment of the present disclosure.
  • the term "and/or" describes the association relationship of associated objects, and indicates that there can be three kinds of relationships. For example, A and/or B can indicate that A exists alone, A and B exist at the same time, and B exists alone these three situations.
  • the characters "three generally indicate that the associated objects are an "or" relationship.
  • the term “plurality” refers to two or more than two, and other quantifiers are similar.
  • the area covered by a base station cell is divided into multiple areas, and each area is divided into a system synchronous block (SSB) coverage area.
  • SSB system synchronous block
  • each area will send a system broadcast message with the same content.
  • the SSB coverage areas are continuous and have a certain overlap area. For example, a cell is covered by 4 SSBs.
  • the data transmission between the SSB coverage areas is time-division, that is, the data is sent at different times.
  • each SSB has 2 candidate times for sending scheduling system broadcast messages, and in a broadcast information monitoring time window, including 8 monitoring opportunities, then each SSB coverage area has 2 At this time, in order to make the base station scheduling flexibility, when sending broadcast information corresponding to each SSB coverage area, it is only necessary to send the scheduling information of the broadcast information to the terminal on one of the monitoring opportunities.
  • the scheduling information sent at the monitoring occasion is used to instruct the base station to send the Physical Downlink Shared Channel (PDSCH) scheduling information corresponding to the broadcast information under the SSB coverage area, including the time domain and PDSCH of the PDSCH. Frequency domain location, modulation coding format and redundancy version, etc.
  • PDSCH Physical Downlink Shared Channel
  • Broadcast and multicast services are important multimedia services that 5G needs to support.
  • service types they include streaming media, such as audio broadcasting and live TV; in terms of data types, they include data files for software upgrades;
  • safety it includes information such as earthquakes, tsunamis, or public health safety.
  • Different services correspond to different delay requirements and data rates vary. Compared with system broadcast information, it has the characteristics of different service quality requirements and different rates. Especially for live TV services, higher service rates are required. and transmission quality requirements.
  • the transmission of broadcast and multicast ancestry includes two modes: PTP and PTM.
  • the PTM mode means that the base station establishes a wireless bearer, transmits at a single point, and receives at the same time by multiple terminals.
  • This mode is suitable for multiple terminals ( For example, more than 10 terminals) receive broadcast and multicast service data;
  • PTP means that the base station establishes a wireless bearer for each terminal, and this method is suitable for a small number of users to receive broadcast and multicast service data.
  • a cell supports multi-beam (beam) transmission.
  • the beam to be transmitted needs to be specified so that the receiving end can receive the data.
  • the beam sent by the base station is consistent with SSB1 (that is, PDCCH and SSB1 have Quasi Co-Location (QCL)) relationship, that is, the channel characteristics on the antenna port symbol transmitting PDCCH can be derived from the antenna port transmitting SSB1).
  • SSB1 that is, PDCCH and SSB1 have Quasi Co-Location (QCL)
  • the base station When the terminal moves from the coverage area of SSB1 to the coverage area of SSB2, when the base station transmits PDCCH, its transmit beam needs to be adjusted to the direction of SSB2 (ie, PDCCH and SSB2 have a QCL relationship).
  • the QCL relationship between the PDCCH and a certain SSB adopts the Transmission Configuration Indication (TCI) state.
  • TCI Transmission Configuration Indication
  • the base station sends the TCI state indication through the Media Access Control-Control Element (MAC-CE) message. information.
  • MAC-CE Media Access Control-Control Element
  • the sending node indicates the transmission mode in the multicast control channel (MCCH), that is, the PTM mode; then the receiving node The (terminal) releases the PTP link, and indicates the PTM configuration information on the MCCH; and then the sending node receives the multicast broadcast service data according to the PTM configuration information.
  • MCCH multicast control channel
  • the PTM to PTP handover instruction and the traditional process of establishing PTP are: the sending node indicates the transmission mode in the MCCH, that is, the PTP mode; then the receiving node releases the PTM configuration information; and then if it is in an idle state, perform a random process to enter the link state, and establish a PTP connection to establish data transmission.
  • a field is used to indicate the transmission mode of a specific broadcast multicast service. For example, when PTP is indicated, it indicates that a specific broadcast multicast service in the cell adopts PTP mode; when PTM is indicated, it indicates that a specific broadcast multicast service in this cell adopts PTM mode.
  • the switching instruction lags behind and cannot respond quickly to the requirement for switching the transmission mode.
  • the main application scenario of PTP/PTM switching is to make the best resource utilization.
  • handover needs to be performed when the number of service users receiving broadcast multicast and the channel changes, and it may also be necessary to perform handover when the communication load of the base station changes.
  • the response time of the MCCH depends on the content modification period of the MCCH configuration.
  • the more commonly used configuration period is 100 milliseconds or 1-2 seconds, and the delay is relatively large (it should be noted that configuring a shorter MCCH content modification period requires the terminal to continuously If the MCCH data is not received, the resources of the air interface are wasted, and it is not conducive to the power saving of the terminal).
  • handover instructions in units of cells will waste the air interface. For example, when there are multiple terminals in the coverage area of SSB1 that satisfy the PTM, the coverage areas of all SSBs in the cell use PTM, which will result in a waste of resources.
  • the present disclosure provides the following embodiments:
  • FIG. 1 a flowchart of steps of a method for switching a transmission mode of broadcast and multicast in an embodiment of the present disclosure, the method includes the following steps:
  • Step 101 Acquire the target transmission mode of the broadcast multicast service, and acquire the configuration information of the target transmission mode.
  • the target transmission mode of the broadcast multicast service is the PTP mode or the PTM mode.
  • the acquisition mode of the target transmission mode may include any one of the following:
  • Obtain the target transmission mode indicated by the base station in the DCI obtain the target transmission mode indicated by the base station in the MCCH, obtain the target transmission mode indicated by the base station through the MAC-CE, and obtain the target transmission mode through a preset timer.
  • the target transmission mode of the broadcast multicast service can be indicated through the DCI, MAC-CE, MCCH of the control channel or through the preset timer, so as to avoid the delay of the transmission mode switching instruction, so that the transmission of the broadcast multicast service can be quickly responded to. mode switching requirements.
  • the configuration information of the target transmission mode may include any of the following: control channel detection timing, PDSCH rate matching information, and partial bandwidth part (Bandwidth part, BWP) information.
  • Step 102 Receive a broadcast multicast service based on the configuration information of the target transmission mode.
  • the broadcast multicast service may be received directly based on the configuration information of the target transmission mode.
  • the target transmission mode is PTP mode
  • the broadcast multicast service is received based on the configuration information of the PTP mode.
  • the target transmission mode is PTM mode
  • the broadcast multicast service is received based on the configuration information of the PTM mode, thus ensuring the broadcast multicast service. The correct reception process of the business.
  • the target transmission mode of the broadcast multicast service is determined by adopting DCI, MCCH, MAC-CE or a preset timer, that is, the switching of the PTM/PTP mode is performed, so that the transmission mode of the broadcast multicast service is performed.
  • the switching is more flexible, which effectively saves air interface resources.
  • each acquisition mode of the target transmission mode will be described separately below.
  • the terminal when the terminal acquires the target transmission mode indicated by the base station in the DCI, it may include any of the following modes:
  • dedicated DCI refers to a DCI format used to indicate the transmission mode of broadcast multicast services, and is distinguished from other existing DCI formats by configuring a special Radio Network Temporary Identifier (RNTI). Network Temporary Identity (ms-RNTI).
  • RNTI Radio Network Temporary Identifier
  • ms-RNTI Network Temporary Identity
  • the transmitting end uses ms-RNTI to scramble the DCI transmitted on the PDCCH channel
  • the receiving end uses ms-RNTI to perform PDCCH detection and descrambling.
  • the terminal can obtain the indication information of the target transmission mode and perform PTP/PTM conversion.
  • the dedicated DCI format includes a broadcast multicast service identification field and an identification field of the target transmission mode, wherein the broadcast multicast service identification field is used to identify the broadcast multicast service identification number, and the identification field of the target transmission mode is used to identify
  • the target transmission mode may be, for example, 0 to identify the PTM mode and 1 to identify the PTP mode, or 1 to identify the PTM mode and 0 to identify the PTP mode, which is not specifically limited here.
  • the first indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a broadcast group The target transmission mode of the broadcast service.
  • the broadcast multicast service can be identified by the Temporary Mobile Group Identifier (TMGI), and the configuration sequence can be: TMGI-1, TMGI-2, TMGI-3...TMGI-N.
  • TMGI Temporary Mobile Group Identifier
  • the bitmap indicates the transmission mode of the corresponding TMGI
  • the sequence of each bit corresponds to the configured broadcast multicast service, as shown in Figure 2.
  • the target transmission modes of the broadcast multicast services identified as TMGI-1 to TMGI-12 are indicated by a bitmap indication mode, where 0 represents the PTM mode and 1 represents the PTM mode.
  • the first indication information It includes at least two groups of bitmap indication information, and each group of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
  • the grouping method used at this time can be:
  • each of the L-1 groups contains K services
  • Group L contains (MK*(L-1)) services, where Indicates rounded up. Also, in an N-bit bitmap, Indicates the group number, and K indicates the transmission mode corresponding to the K services.
  • L takes the smallest value in the array ⁇ 1,2,3...N-1 ⁇ .
  • the target transmission mode of the broadcast multicast service is indicated by means of a bitmap, which reduces the overhead of dedicated DCI.
  • the second indication information is indicated through the DCI of the broadcast multicast
  • the current transmission mode of the broadcast multicast service is the PTP mode
  • the second indication information is indicated in the DCI scheduled by the unicast.
  • the current transmission mode is PTM
  • the second indication information is indicated in the DCI of the multicast scheduling.
  • the manner in which the broadcast multicast DCI includes the second indication information may include:
  • An indication field is newly added to the DCI of broadcast multicast, and the indication field contains second indication information; or, the meaning of the original target field in the DCI of broadcast multicast is redefined as the second indication information.
  • adding an indication field to the DCI the content information of the original DCI needs to be added, and the total size (size, the sum of the bits of all information fields) of the relevant DCI is increased.
  • adding 1 bit to the DCI indicates the second indication information (for example: 0 means keep the current mode unchanged, 1 means the transmission mode is switched, or vice versa), that is, it indicates that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission method, the implementation process of this method is simple.
  • the original target field includes any one of the following: DCI indication format, PUCCH power control parameter, HARQ process ID, frequency domain resource allocation indication (for example: using a combination that is not used in frequency domain resource indication) , such as: all "1"), time domain resource allocation indication. That is, by modifying the original meaning of any of the above target original fields, the original meaning of the above target original fields is redefined as the second indication information, which is beneficial for the terminal to perform channel detection and reduces the channel detection capability requirement.
  • the indication of the target transmission mode by means of DCI is realized by any one of the above two manners.
  • the DCI used to indicate the target transmission mode also includes carrier indication information and/or BWP information. This enables the terminal to receive the corresponding PDSCH according to the carrier indication information in the DCI when the PDSCH used for transmitting the broadcast multicast service and the carrier sent by the PDCCH are on different carriers or BWPs.
  • the terminal when acquiring the target transmission mode indicated by the base station in the MCCH, the terminal may receive third indication information periodically sent by the base station through the MCCH.
  • the third indication information includes the target transmission mode of the broadcast multicast service, the carrier or cell information for sending the broadcast multicast service, and the index of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area.
  • the content included in the third indication information is as follows:
  • TMG1 1, indicating that the broadcast multicast service identification number is 1;
  • mode PTM, indicating that when the index number of the SSB coverage area is 2, the target transmission mode is the PTM mode;
  • mode PTP, indicating that when the index number of the SSB coverage area is 3, the target transmission mode is the PTP mode.
  • the broadcast multicast service identification number is 1 to be sent in cell 3, where the SSB0 of cell 3 uses PTP transmission, the SSB1 of cell 3 uses PTM transmission, and the SSB2 of cell 3 uses PTM.
  • the transmission mode is sent, and the transmission mode of PTP is used to send under the SSB3 of cell 3.
  • the target transmission mode is periodically indicated by the above-mentioned MCCH method, so that the terminal newly accessing and receiving the broadcast multicast service can obtain the transmission mode of the specific broadcast multicast service.
  • the terminal when acquiring the target transmission mode indicated by the base station through the MAC-CE, the terminal may receive fourth indication information sent by the base station through the MAC-CE.
  • the fourth indication information includes a control resource set identification number and a transmission configuration indication (TCI) state identification number, wherein the TCI state identification number is associated with the SSB index number.
  • TCI transmission configuration indication
  • the main application scenario is that the terminal moves from one SSB coverage area to another SSB coverage area.
  • the fourth indication information sent by the MAC-CE can be used to inform the target of the broadcast multicast service.
  • the transmission method is indicated.
  • the field contents of the MAC-CE are shown in the following table:
  • the broadcast multicast transmission mode corresponding to the SSB coverage area is periodically indicated based on the MCCH, so that A certain SSB index has a corresponding broadcast multicast transmission mode, so that the terminal can obtain the target transmission mode of the broadcast multicast service of the corresponding SSB through the changed SSB index number. That is, when the broadcast multicast transmission mode of the corresponding SSB before the SSB index conversion is the PTM mode, and the broadcast multicast transmission mode of the corresponding SSB after the SSB index conversion is PTP, it means switching to the PTP mode.
  • the target transmission mode of the broadcast multicast service may be determined as a target transmission mode other than the current Another transmission mode other than the transmission mode is to switch the transmission mode.
  • the terminal detects the corresponding control channel on the detection opportunity of the corresponding mode. If the base station sends a notification, but the terminal does not detect it), it is considered that the transmission mode of broadcast multicast has changed, and the terminal switches to another transmission mode to detect the corresponding control channel on the detection opportunity.
  • the target transmission mode is indicated by a preset timer, so that the transmission mode can also be switched in the case that the terminal cannot receive the information.
  • the above embodiment realizes the indication of the target transmission mode of the broadcast multicast service by means of DCI, MCCH, MAC-CE or a preset timer, that is, the switching instruction of the transmission mode of the broadcast multicast service is realized, which is equivalent to The prior art makes the switching of the transmission mode more flexible and effectively saves air interface resources.
  • the terminal when the terminal is in the connected state, the terminal measures the adjacent SSBs and reports the measurement results to the base station, and the base station determines the timing for the terminal to perform SSB handover, thereby ensuring effective operation in a specific SSB coverage area.
  • PTP/PTM switching When the terminal is in the idle state, the terminal can only receive broadcast multicast services sent by PTM.
  • the terminal selects the SSB coverage area according to the mobility measurement result.
  • the configuration information of the PTP mode and the configuration information of the PTM mode sent by the base station through high-layer signaling may be received. or, after acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the target transmission mode sent by the base station.
  • the base station can send the configuration information of PTM and PTP to the terminal in advance through high-level signaling, and directly apply the configuration information of PTM or PTP after the terminal obtains the target transmission mode of the broadcast multicast service without re-acquiring from the base station, so that the It is possible to further reduce the time delay of transmission mode conversion.
  • the base station may also receive the configuration information of the target transmission mode sent by the base station after acquiring the target transmission mode of the broadcast multicast service, so as to avoid receiving the configuration information of the invalid transmission mode.
  • the configuration information includes control channel detection timing corresponding to the transmission mode and/or PDSCH rate matching information.
  • control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services; the rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
  • the terminal when the target transmission mode is the PTP mode and the terminal is in an idle state, the terminal can receive the random access channel RACH resources configured by the base station for establishing PTP; or, when the target transmission mode is In the PTP mode and the terminal is in an idle state, the terminal may generate a random number, and perform a random access process when the random number is greater than the preset access factor.
  • the RACH resource is an additional RACH resource, which can be configured through broadcast or multicast messages, so that the terminal can initiate a random access procedure on the additionally configured RACH resource, avoiding the problem of instantaneous network congestion.
  • the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas. This makes the indication granularity of the transmission mode at the SSB coverage area level, which is finer than that at the cell level, which further saves air interface resources.
  • the target transmission mode of the broadcast multicast service is determined by adopting DCI, MCCH, MAC-CE or a preset timer, that is, the PTM/PTP mode is performed. Switching makes the switching of the transmission mode of the broadcast multicast service more flexible, and effectively saves air interface resources.
  • FIG. 5 it is a flowchart of steps of a method for switching a broadcast multicast service transmission mode applied to a base station in an embodiment of the present disclosure, and the method includes the following steps:
  • Step 501 Send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal.
  • the base station sends the target transmission mode of the broadcast multicast service to the terminal, and sends the configuration information of the target transmission mode to the terminal, so that the terminal can receive the broadcast multicast service based on the configuration information of the target transmission mode.
  • the target transmission mode of the broadcast multicast service is the PTP mode or the PTM mode.
  • the method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through DCI, sending the target transmission mode to the terminal through MCCH, sending the target transmission mode through MAC-CE sent to the terminal.
  • the base station can indicate the target transmission mode of the broadcast multicast service through DCI, MAC-CE or MCCH, so as to avoid the delay of the transmission mode switching instruction, so that the request for the transmission mode switching of the broadcast multicast service can be quickly responded.
  • the configuration information of the target transmission mode may include control channel detection timing and/or PDSCH rate matching information.
  • the switching of the transmission mode of the broadcast multicast service is more flexible and effectively saves money. air interface resources.
  • each indication mode of the target transmission mode will be described separately below.
  • the base station when the base station sends the target transmission mode to the terminal through DCI, it may include any of the following modes:
  • the first indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a broadcast multicast service target transmission method.
  • the first indication information It includes at least two groups of bitmap indication information, and each group of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
  • the manner in which the broadcast-multicast DCI includes the second indication information may include: an indication field is newly added to the broadcast-multicast DCI, and the indication field includes the second indication information; The meaning of the original field of the target is redefined as the second indication information.
  • the target original field includes any one of the following: DCI indication format, PUCCH power control parameter, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
  • the DCI used to indicate the target transmission mode also includes carrier indication information.
  • the third indication information may be sent periodically through the MCCH.
  • the third indication information includes the target transmission mode of the broadcast multicast service, carrier or cell information for sending the broadcast multicast service, and the index number of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area.
  • the target transmission mode is periodically indicated by the above-mentioned MCCH method, so that the terminal newly accessing and receiving the broadcast multicast service can obtain the transmission mode of the specific broadcast multicast service.
  • the base station when the base station sends the target transmission mode to the terminal through the MAC-CE, the base station may send the fourth indication information through the MAC-CE,
  • the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
  • the above embodiment realizes the indication of the target transmission mode of the broadcast multicast service through the DCI, MCCH or MAC-CE mode, that is, realizes the switching instruction of the transmission mode of the broadcast multicast service, which is equivalent to the prior art, so that the transmission The mode switching is more flexible, which effectively saves air interface resources.
  • the configuration information of the PTP mode and the PTM mode may be sent through high-level signaling before the target transmission mode of the broadcast multicast service is sent to the terminal.
  • the configuration information of the target transmission mode is sent to the terminal; or, after the target transmission mode of the broadcast multicast service is sent to the terminal, the configuration information of the target transmission mode is sent to the terminal; wherein, the configuration information includes the control channel detection timing of the corresponding transmission mode and /or rate matching information of the physical downlink shared channel PDSCH.
  • control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services; the rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
  • the base station may further configure the random access channel RACH resource used by the terminal to establish the PTP.
  • the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas. This makes the indication granularity of the transmission mode at the SSB coverage area level, which is finer than that at the cell level, which further saves air interface resources.
  • the method for switching the transmission mode of the broadcast multicast service makes the switching of the transmission mode of the broadcast multicast service more flexible by using DCI, MCCH or MAC-CE to indicate the target transmission mode of the broadcast multicast service. , effectively saving air interface resources.
  • the target transmission mode of the broadcast multicast service is indicated by dedicated DCI signaling, which specifically includes the following steps:
  • Step 1 the base station indicates the target transmission mode of the broadcast multicast service through dedicated DCI signaling.
  • dedicated DCI signaling refers to a DCI format used to indicate the transmission mode of broadcast multicast services.
  • This format can be distinguished from other existing DCI formats by configuring a special Radio Network Temporary Identifier (RNTI), such as defining mode conversion.
  • RNTI Radio Network Temporary Identifier
  • ms-RNTI Wireless Network Temporary Identifier
  • the sender which can be a base station
  • ms-RNTI uses ms-RNTI to scramble the DCI transmitted on the PDCCH channel
  • the receiver which can be a terminal
  • uses ms-RNTI to detect and decipher the PDCCH scrambling to obtain PTP/PTM conversion information.
  • the content of the dedicated DCI signaling format includes the following:
  • Broadcast multicast service identification field which is used to indicate the broadcast multicast service identification number
  • the identification field of the target transmission mode is used to identify the target transmission mode, for example, "0" may be used to identify the PTM mode, "1” may be used to identify the PTP mode, or "1” may be used to identify the PTM mode, and "0” may be used to identify the PTP mode. This does not specifically limit this.
  • a bitmap can be used to indicate the target transmission mode of the broadcast multicast service, and the specific indication mode is as follows:
  • each bit in the bitmap corresponds to a broadcast multicast
  • the target transmission mode of the service that is, the bitmap indicates the transmission mode of the corresponding TMGI
  • each bit sequence corresponds to the configured broadcast multicast service, as shown in Figure 2.
  • 0 represents the PTM method
  • 1 represents the PTM method.
  • a grouping indication method can be used, that is, at least two sets of bitmap indication information are included in the dedicated DCI signaling, and each set of bits The map indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode. For example, if a total of M broadcast multicast services that need to be indicated by dedicated DCI signaling are configured, the maximum number of bits carried by the dedicated DCI signaling is N, and M>N, the grouping method used at this time can be:
  • each of the L-1 groups contains K services
  • the Lth group contains (MK*(L-1)) services. Also, in an N-bit bitmap, Indicates the group number, and K indicates the transmission mode corresponding to the K services.
  • L takes the smallest value in the array ⁇ 1,2,3...N-1 ⁇ .
  • the base station and the terminal can adaptively group the target transmission method of the broadcast multicast service according to the change of the value of M.
  • Step 2 the terminal acquires the configuration information of the transmission mode of the corresponding broadcast multicast service.
  • the configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the PDSCH.
  • the control channel detection timing refers to the time (time slot or symbol) at which the terminal detects the control channel when receiving the broadcast multicast service.
  • the base station configures the detection timing according to the service characteristics, so that the terminal can receive the control channel at a specific time, which has the effect of saving power.
  • the detection timing may be configured based on a single service (eg, associated with TMGI), or may be configured based on a group of services.
  • the configuration information may be configured through RRC signaling, broadcast signaling, or multicast signaling.
  • the rate matching information of PDSCH means that when the base station sends PDSCH data for scheduling broadcast multicast, some resource units that cannot be occupied by PDSCH are deducted from the scheduled frequency domain or time resources, which ensures the flexibility of base station invocation. It should be noted that these resources (time information and frequency domain information) that cannot be occupied by invocation are configured through RRC signaling, broadcast signaling, or multicast signaling.
  • the rate matching information of the PTM is configured independently, that is, the configuration is effective for a group of terminals.
  • step 2 may be performed after step 1, that is, the base station sends the configuration information of the target transmission mode according to the target transmission mode of the broadcast multicast service.
  • this step can also be performed before step 1, that is, the base station configures both the configuration information of the PTP mode and the configuration information of the PTM mode to the terminal, and the terminal selects the configuration information of the target transmission mode according to the target transmission mode.
  • Step 3 Receive the broadcast multicast service based on the configuration information of the target transmission mode.
  • the terminal may detect the scheduling signaling DCI according to the configuration information of the target transmission mode, and receive PDSCH data on the current carrier or other carriers according to the DCI indication.
  • the terminal adopts different receiving processing methods for different transmission modes, and the specific receiving processing methods are as follows:
  • the terminal When the target transmission mode is the PTM mode, the terminal starts to detect the control channel at the detection timing configured in the PTM mode. When the corresponding scheduling information is detected, DCI parsing is performed in the format of group scheduling. If the DCI contains a rate matching indication, the parsing is performed according to the rate matching information configured in the PTM mode, and the detection is stopped at the detection timing configured in the PTP mode. control channel.
  • the terminal When the target transmission mode is PTP, the terminal starts to detect the control channel at the detection timing configured by the PTP mode. When the corresponding scheduling information is detected, it performs DCI analysis in the format of unicast scheduling. For example, when the DCI contains a rate matching indication, Then, it parses according to the rate matching information configured in the PTP mode, and stops detecting the control channel at the detection timing configured in the PTM mode.
  • the DCI of the group scheduling information contains carrier indication information (that is, the carriers sent by PDSCH and PDCCH are on different carriers).
  • the terminal The corresponding PDSCH is received according to the configured carrier indication information.
  • the target transmission mode of the broadcast multicast service is indicated by the DCI signaling of broadcast multicast scheduling, which specifically includes the following steps:
  • Step 1 the base station indicates the target transmission mode of the broadcast multicast service through the DCI signaling of the broadcast multicast scheduling.
  • any of the following methods may be adopted:
  • an indication field for indicating that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode is added.
  • the content information of the original DCI needs to be increased, and the total size of the relevant DCI (size, the sum of the bits of all information fields) is increased). For example, adding 1 bit to the DCI indicates that the switching of the PTP or PTM mode will be performed.
  • the implementation process of this method is simple.
  • Second redefine the meaning of the original target field in the DCI of the broadcast multicast as second indication information, and the second indication information is used to instruct the transmission mode of the broadcast multicast service to be switched from the current transmission mode to the target transmission mode.
  • the original field of the target includes any of the following:
  • DCI indication format PUCCH power control parameter, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
  • the signaling content of broadcast multicast scheduling is shown in the following table:
  • the switching of the transmission mode is indicated by a specific combination of the "frequency domain resource allocation indication" or "time domain resource allocation indication” field
  • the frequency domain resource allocation indication is all 1
  • the time domain resource allocation indication is all 0, it indicates the transmission mode switching of the broadcast multicast service, which is not specifically limited at present.
  • the DCI of the group scheduling information contains carrier indication information (that is, the carriers sent by PDSCH and PDCCH are on different carriers).
  • the configured carrier indication information receives the corresponding PDSCH.
  • the carrier indication information can also be indicated in two ways, one is to add a new information field, and the other is to redefine the meaning of the original field in the DCI.
  • the original field of the redefinition DCI indicates the carrier indication information is described as follows:
  • the 1-bit length of the DCI format indication (DCI formats), when the DCI is non-broadcast multicast (the non-broadcast multicast DCI here refers to the existing scheduling signaling format DCI, such as C-RNTI, CS- RNTI and MCS-RNTI are unicast data scheduled by scrambling code), which are used to indicate whether it is uplink or downlink scheduling.
  • the broadcast multicast DCI here is broadcast or multicast data scheduled by channel scrambling code "different from the existing unicast RNTI", such as: G-RNTI
  • the Bit information may be used to indicate carrier indication information.
  • the 2-bit PUCCH power control parameter is used to indicate the uplink power parameter when the DCI is non-broadcast multicast.
  • the power control parameters need to be carried out in other ways (such as based on the downlink path loss of each terminal), and the power control parameters of the uplink PUCCH can be omitted, which can be used to indicate carrier indication information. .
  • Step 2 The terminal acquires the configuration information of the target transmission mode.
  • This step is the same as step 2 of the first embodiment, and will not be repeated here.
  • this embodiment can solve the problem in the following ways:
  • additional RACH resources that is, when the target transmission mode is the PTP mode and the terminal is in an idle state, it can receive the RACH resources configured by the base station for establishing PTP.
  • some additional RACH access resources are configured through broadcast or multicast messages.
  • the network instructs to switch to PTP, it also instructs that these RACH resources take effect.
  • Terminals that need to establish connections due to receiving broadcast and multicast services, some or all terminals are in Random access is initiated on additionally configured PRACH resources.
  • the base station indicates the validity period of the additional RACH resources, that is, during the validity period, the terminal can use the additionally configured RACH resources to initiate random access.
  • the additional RACH resource may be a separately configured RACH resource, or may be a RACH resource originally configured by the base station but masked out by MASK.
  • Step 3 Receive the broadcast multicast service according to the configuration information of the target transmission mode.
  • the terminal detects the scheduling signaling DCI according to the configuration information of the target transmission mode, and receives PDSCH data on the current carrier or other carriers according to the DCI instruction.
  • the terminal starts to detect the control channel at the detection timing configured for the PTP mode, and stops the behavior of detecting the control channel at the detection timing configured for the PTM mode.
  • the target transmission mode of the broadcast multicast service is indicated by a preset timer.
  • indicating the target transmission mode of the broadcast multicast service based on the preset timer is a supplementary mode to the first embodiment and the second embodiment, and can be used together with the first embodiment and the second embodiment.
  • the terminal fails to detect the target transmission mode of the broadcast multicast service for some reason (such as poor channel quality, unable to correctly detect the relevant information, or because of the priority problem, the terminal receives the service with higher priority), based on The preset timer indicates the target transmission mode.
  • the terminal detects the corresponding control channel on the detection opportunity of the corresponding mode. Then, it is considered that the transmission mode of broadcast and multicast has changed (it may be that the base station sends a notification, but the terminal does not detect it), and the terminal switches to another transmission mode to detect the corresponding control channel.
  • the base station instructs a specific broadcast multicast service to be sent in PTM mode
  • the terminal detects the broadcast multicast control channel at the detection timing corresponding to the PTM mode, starts a preset timer (for example, the timer duration is 1 second), and Perform the following process:
  • the timing is restarted, and the terminal continues to detect the control channel of broadcast and multicast at the detection opportunity of PTM;
  • the preset timer expires (that is, no broadcast multicast control information is received within 1 s)
  • the target transmission mode of the broadcast multicast service is the PTP mode
  • the terminal receives the broadcast multicast service in the PTP mode.
  • the present disclosure realizes flexible switching of broadcast-multicast transmission modes through the above-mentioned embodiments.
  • FIG. 6 it is a block diagram of a module of an apparatus for switching a broadcast multicast transmission mode applied to a terminal in an embodiment of the present disclosure, and the apparatus includes:
  • an obtaining module 601 configured to obtain a target transmission mode of a broadcast multicast service, and obtain configuration information of the target transmission mode
  • a receiving module 602 configured to receive the broadcast multicast service based on the configuration information of the target transmission mode;
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode
  • the acquisition method of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH, Obtain the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtain the target transmission mode through a preset timer.
  • the acquiring the target transmission mode indicated by the base station in the downlink control information DCI includes:
  • the base station receiving the first indication information sent by the base station through dedicated DCI signaling, wherein the first indication information includes the broadcast multicast service identification number and the identification information of the target transmission mode; or,
  • the second indication information sent by the base station through the DCI of broadcast multicast is received, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
  • the first indication information is bitmap indication information
  • the bitmap indication information contains Each bit corresponds to a target transmission mode of a broadcast multicast service.
  • the broadcast and multicast services are at least two services configured based on the cell or synchronization signal block SSB coverage area, and the number of bits carried by the dedicated DCI signaling is less than the total configured number of broadcast and multicast services.
  • the first indication information includes at least two groups of bitmap indication information, and each group of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
  • a manner in which the broadcast-multicast DCI includes the second indication information includes:
  • An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,
  • the meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
  • the acquiring the target transmission mode through a preset timer includes:
  • the target transmission mode of the broadcast multicast service is determined to be another transmission mode other than the current transmission mode.
  • the apparatus provided in this embodiment can implement all the method steps that can be implemented by the above-mentioned terminal-side method embodiments, and can achieve the same technical effect, which is not repeated here.
  • FIG. 7 it is a block diagram of a module of an apparatus for switching a broadcast multicast transmission mode applied to a base station in an embodiment of the present disclosure, and the apparatus includes:
  • a sending module 701 configured to send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the configuration information based on the target transmission mode the broadcast multicast service;
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode
  • the method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through the downlink control information DCI, and sending the target transmission mode to the terminal through the multicast control channel MCCH.
  • the terminal sends the target transmission mode to the terminal through the medium access control-control unit MAC-CE.
  • the sending the target transmission mode to the terminal through downlink control information DCI includes:
  • the first indication information includes the identification number of the broadcast multicast service and the identification information of the target transmission mode;
  • the second indication information is sent through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
  • the first indication information is bitmap indication information
  • the bitmap indication information contains Each bit corresponds to a target transmission mode of a broadcast multicast service.
  • the broadcast and multicast services are at least two services configured based on the cell or synchronization signal block SSB coverage area, and the number of bits carried by the dedicated DCI signaling is less than the total configured number of broadcast and multicast services.
  • the first indication information includes at least two groups of bitmap indication information, and each group of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
  • a manner in which the broadcast-multicast DCI includes the second indication information includes:
  • An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,
  • the meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
  • the apparatus provided in this embodiment can implement all the method steps that can be implemented by the above-mentioned base station side method embodiments, and can achieve the same technical effect, which is not repeated here.
  • FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure.
  • the terminal 800 may include: at least one processor 801 , memory 802 , at least one network interface 804 and other user interfaces 803 .
  • the various components in the mobile terminal 800 are coupled together by a bus system 805 .
  • the bus system 805 is used to implement the connection communication between these components.
  • the bus system 805 also includes a power bus, a control bus and a status signal bus.
  • the various buses are labeled as bus system 805 in FIG. 8 .
  • the user interface 803 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen.
  • the memory 802 in embodiments of the present disclosure may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDRSDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory 802 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set of them, such as the operating system 8021 and the application programs 8022.
  • the operating system 8021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks.
  • the application program 8022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services.
  • a program implementing the method of the embodiment of the present disclosure may be included in the application program 8022 .
  • the processor 801 by calling the computer program or instruction stored in the memory 802, specifically, the computer program or instruction stored in the application program 8022, the processor 801 is configured to:
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode; the acquisition mode of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring The base station obtains the target transmission mode indicated by the base station in the multicast control channel MCCH, obtains the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtains the target transmission mode through a preset timer.
  • the methods disclosed in the above embodiments of the present disclosure may be applied to the processor 801 or implemented by the processor 801 .
  • the processor 801 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method can be completed by an integrated logic circuit of hardware in the processor 801 or an instruction in the form of software.
  • the above-mentioned processor 801 can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the methods disclosed in conjunction with the embodiments of the present disclosure may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and completes the steps of the above method in combination with its hardware.
  • the embodiments described in this disclosure may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), Digital Signal Processing Device (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other for performing the functions described in this disclosure electronic unit or a combination thereof.
  • ASIC Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Device
  • PLD programmable Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • the described techniques may be implemented through modules (eg, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure.
  • Software codes may be stored in memory and executed by a processor.
  • the memory can be implemented in the processor or external to the processor.
  • the processor 801 is further configured to: receive first indication information sent by the base station through dedicated DCI signaling, where the first indication information includes a broadcast multicast service identification number and all The identification information of the target transmission mode; or, receiving the second indication information sent by the base station through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission method.
  • the first indication information is bitmap indication information, and all Each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
  • the broadcast multicast services are at least two services configured based on the cell or synchronization signal block SSB coverage area, and the number of bits borne by the dedicated DCI signaling is less than the configured total number of services.
  • the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
  • a manner in which the broadcast-multicast DCI includes the second indication information includes: an indication field is newly added to the broadcast-multicast DCI, and the indication field includes the second indication information; or, the meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
  • the original target field includes any one of the following: DCI indication format, physical uplink control channel PUCCH power control parameter, HARQ process number, frequency domain resource allocation indication, time domain resource Assignment Instructions.
  • the DCI used to indicate the target transmission mode further includes carrier indication information.
  • the processor 801 is further configured to: receive third indication information periodically sent by the base station through the MCCH, where the third indication information includes the target transmission mode of the broadcast multicast service , the carrier or cell information for sending the broadcast multicast service, and the index number of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area.
  • the processor 801 is further configured to: receive fourth indication information sent by the base station through the MAC-CE, where the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
  • the processor 801 is further configured to: when the terminal does not receive the DCI of the broadcast multicast within the timing duration of the preset timer, transmit the target of the broadcast multicast service The mode is determined to be another transmission mode other than the current transmission mode.
  • the processor 801 is further configured to: before acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the PTP mode and the configuration information of the PTM mode sent by the base station through high-layer signaling. configuration information; or, after acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the target transmission mode sent by the base station;
  • the configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
  • control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services; the rate matching information of the PDSCH corresponding to the PTM mode is based on a group of terminal to configure.
  • the processor 801 is further configured to: when the target transmission mode is the PTP mode and the terminal is in an idle state, receive a random access channel RACH resource configured by the base station for establishing PTP; or , when the target transmission mode is the PTP mode and the terminal is in an idle state, the terminal generates a random number, and performs a random access process when the random number is greater than a preset access factor.
  • the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas.
  • the terminal provided by the embodiments of the present disclosure can implement each process implemented by the terminal in the foregoing embodiments, and to avoid repetition, details are not described herein again.
  • FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • the base station 900 may include at least one processor 901 , a memory 902 , at least one other user interface 903 , and a transceiver 904 .
  • the various components in base station 900 are coupled together by bus system 905 .
  • the bus system 905 is used to implement the connection communication between these components.
  • the bus system 905 also includes a power bus, a control bus and a status signal bus.
  • the various buses are labeled as bus system 905 in FIG.
  • the bus system may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 901 and memory 902
  • the various circuits representing the memory are linked together.
  • the bus system can also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore will not be further described in the embodiments of the present disclosure .
  • the bus interface provides the interface.
  • Transceiver 904 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium.
  • the user interface 903 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the memory 902 in embodiments of the present disclosure may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDRSDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the processor 901 is responsible for managing the bus system and general processing, and the memory 902 can store computer programs or instructions used by the processor 901 when performing operations. Specifically, the processor 901 can be used for: the target transmission mode of the broadcast multicast service. send to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,
  • the target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode; the mode of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode through downlink control information DCI To the terminal, the target transmission mode is sent to the terminal through the multicast control channel MCCH, and the target transmission mode is sent to the terminal through the medium access control-control unit MAC-CE.
  • the methods disclosed in the above embodiments of the present disclosure may be applied to the processor 901 or implemented by the processor 901 .
  • the processor 901 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method may be completed by an integrated logic circuit of hardware in the processor 901 or an instruction in the form of software.
  • the above-mentioned processor 901 can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the methods disclosed in conjunction with the embodiments of the present disclosure may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the above method in combination with its hardware.
  • the embodiments described in this disclosure may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), Digital Signal Processing Device (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other for performing the functions described in this disclosure electronic unit or a combination thereof.
  • ASIC Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Device
  • PLD programmable Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • the described techniques may be implemented through modules (eg, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure.
  • Software codes may be stored in memory and executed by a processor.
  • the memory can be implemented in the processor or external to the processor.
  • the processor 901 is further configured to: send first indication information through dedicated DCI signaling, where the first indication information includes a broadcast multicast service identification number and the target transmission or the second indication information is sent through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
  • the first indication information is bitmap indication information, and all Each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
  • the broadcast multicast services are at least two services configured based on the cell or synchronization signal block SSB coverage area, and the number of bits borne by the dedicated DCI signaling is less than the configured total number of services.
  • the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
  • a manner in which the broadcast-multicast DCI includes the second indication information includes: an indication field is newly added to the broadcast-multicast DCI, and the indication field includes the second indication information; or, the meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
  • the original target field includes any one of the following: DCI indication format, physical uplink control channel PUCCH power control parameter, HARQ process number, frequency domain resource allocation indication, time domain resource Assignment Instructions.
  • the DCI used to indicate the target transmission mode further includes carrier indication information.
  • the processor 901 is further configured to: periodically send third indication information through the MCCH, where the third indication information includes the target transmission mode, sending method of the broadcast multicast service The carrier or cell information of the broadcast multicast service, and the index number of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area.
  • the processor 901 is further configured to: send fourth indication information through the MAC-CE, where the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein The TCI state identification number is associated with the SSB index number.
  • the processor 901 is further configured to: before sending the target transmission mode of the broadcast multicast service to the terminal, send the configuration information of the PTP mode and the configuration information of the PTM mode through high-layer signaling. sending the configuration information to the terminal; or, after sending the target transmission mode of the broadcast multicast service to the terminal, sending the configuration information of the target transmission mode to the terminal;
  • the configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
  • control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services; the rate matching information of the PDSCH corresponding to the PTM mode is based on a group of terminal to configure.
  • the processor 901 is further configured to: when the target transmission mode is the PTP mode and the terminal is in an idle state, configure the terminal to use a random access channel RACH resource for establishing PTP.
  • the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas.
  • the base station provided in the embodiments of the present disclosure can implement each process implemented by the base station in the foregoing embodiments, and to avoid repetition, details are not described herein again.
  • the electronic device provided by the embodiments of the present disclosure includes corresponding hardware structures and/or software modules for executing each function.
  • the present disclosure can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present disclosure.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection of devices or units through some interfaces.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of software functional units.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium.
  • all or 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 and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present disclosure.
  • the computer storage medium is a non-transitory (English: nontransitory) medium, including: flash memory, removable hard disk, read-only memory, random access memory, magnetic disk or optical disk and other mediums that can store program codes.
  • an embodiment of the present disclosure also provides a computer program product, the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, when the program instructions When executed by a computer, the computer can execute the methods provided by the above method embodiments.
  • an embodiment of the present disclosure also provides a non-transitory computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the method steps provided in the above embodiments and can achieve the same The technical effect will not be repeated here.

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Abstract

本公开实施例提供一种广播组播传输方式的切换方法、终端及基站,其中方法包括:获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;基于所述目标传输方式的配置信息接收所述广播组播业务;其中,所述目标传输方式为PTP方式或PTM方式;所述目标传输方式的获取方式包括下述任意一项:获取基站在DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。本公开实施例能够快速指示广播组播业务的传输方式。

Description

一种广播组播传输方式的切换方法、终端及基站
相关申请的交叉引用
本申请要求于2020年07月15日提交的申请号为2020106822289,发明名称为“一种广播组播传输方式的切换方法、终端及基站”的中国专利申请的优先权,其通过引用方式全部并入本文。
技术领域
本公开涉及通信技术领域,尤其涉及一种广播组播传输方式的切换方法、终端及基站。
背景技术
随着移动视频业务、对等组播/广播流、群组通信以及广播/组播物联网(The Internet of Things,IoT)应用的日益普及,全球移动通信业界达成共识,第五代移动通信(5th generation mobile networks,5G)网络需要具备在单播型业务及组播型业务间灵活、动态地进行无线频谱及网络资源分配的能力,并需要支持对于广播/组播网络的独立部署。
在当前的5G中,基站发送两种数据类型,一种是面向终端的数据,该数据只有目标终端才能接收到,这种数据成为单播数据;另外一种是面向本小区内所有终端或特定群组的数据,即小区内所有用户或特定群组用户能够接收该业务。
在新空口(New Radio,NR)的技术演进中,为了更有效的进行广播组播传输,支持两种传输方式,即点对点(point to point,PTP)传输方式和点对多点(point to multi-point,PTM)传输方式。其中,PTP方式指发送节点(基站)基于单个终端进行数据的传输,即调度信令和相应的调度数据是针对一个终端进行的;该方式的特点是基站可以根据终端的信道的情况,调整数据码率,接收广播组播业务用户较少时(即需要进行PTP方式接收业务的终端比较少时),有利于节约空口资源。PTM方式指,发送节点基于多个终 端进行数据的传输,即调度信令和相应的调度数据是针对一组终端进行的;该方式的特点是需要以较低的数据码率进行数据传输,当接收终端数目较多时,有利于节约空口资源。
当传输方式需要在PTP方式和PTM方式之间转换时,如何有效快速指示传输方式发生了变化以避免空口资源浪费,是目前需要研究的问题。
发明内容
本公开实施例提供一种广播组播传输方式的切换方法、终端及基站,以快速指示广播组播业务的传输方式。
本公开实施例提供一种广播组播传输方式的切换方法,应用于终端,包括:
获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;
基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;
所述目标传输方式的获取方式包括下述任意一项:获取基站在下行控制信息DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。
本公开实施例提供一种广播组播传输方式的切换方法,应用于基站,包括:
将广播组播业务的目标传输方式发送给终端,并将所述目标传输方式的配置信息发送给所述终端,以使所述终端基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;
将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项:通过下行控制信息DCI将所述目标传输方式发送给终端、通过多播控制信道MCCH将所述目标传输方式发送给终端、通过媒体访问控制-控制单元 MAC-CE将所述目标传输方式发送给终端。
本公开实施例提供一种广播组播传输方式的切换装置,应用于终端,包括:
获取模块,用于获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;
接收模块,用于基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;
所述目标传输方式的获取方式包括下述任意一项:获取基站在下行控制信息DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。
本公开实施例提供一种广播组播传输方式的切换装置,应用于基站,包括:
发送模块,用于将广播组播业务的目标传输方式发送给终端,并将所述目标传输方式的配置信息发送给所述终端,以使所述终端基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;
将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项:通过下行控制信息DCI将所述目标传输方式发送给终端、通过多播控制信道MCCH将所述目标传输方式发送给终端、通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端。
本公开实施例提供一种终端,包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现应用于终端的广播组播传输方式的切换方法的步骤。
本公开实施例提供一种基站,包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现应用于基站的广播组播传输方式的切换方法的步骤。
本公开实施例提供一种非暂态计算机可读存储介质,其上存储有计算机程序,该计算机程序被处理器执行时实现所述的广播组播传输方式的切换方法的步骤。
本公开实施例提供的广播组播传输方式的切换方法、终端及基站,通过采用DCI、MCCH、MAC-CE或预设定时器的方式进行广播组播业务的目标传输方式的获取,即进行PTM/PTP方式的切换,使得广播组播业务的传输方式的切换更加灵活,实现了有效快速指示传输方式发生了变化,避免了空口资源浪费,有效节约了空口资源。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图是本公开的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本公开实施例中应用于终端的广播组播业务传输方式的切换方法的步骤流程图;
图2为本公开实施例中通过位图指示多个广播组播业务的目标传输方式的示意图;
图3为本公开实施例中分组指示多个广播组播业务的目标传输方式的示意图之一;
图4为本公开实施例中分组指示多个广播组播业务的目标传输方式的示意图之二;
图5为本公开实施例中应用于基站的广播组播业务传输方式的切换方法的步骤流程图;
图6为本公开实施例中应用于终端的广播组播业务传输方式的切换装置的模块框图;
图7为本公开实施例中应用于基站的广播组播业务传输方式的切换装置的模块框图;
图8为本公开实施例中终端的结构示意图;
图9为本公开实施例中基站的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚,下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本公开一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本公开保护的范围。
为了便于清楚描述本公开实施例的技术方案,在本公开的各实施例中,若采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分,本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定。
本公开实施例中术语“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。字符“三种一般表示前后关联对象是一种“或”的关系。
本公开实施例中术语“多个”是指两个或两个以上,其它量词与之类似。
此外,应理解,说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本公开的至少一个实施例中。因此,在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外,这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
具体的,当前5G的系统设计中,将一个基站小区覆盖的区域分割成多个区域,每个区域分为系统同步块覆盖区(System synchronous block,SSB),当发送系统广播消息时,每个区域都会发送一次内容相同的系统广播消息,为了保证覆盖的连续性,SSB覆盖区之间是连续且有一定的重叠区,例如一个小区被4个SSB覆盖。具体的,对应每个SSB覆盖区域发送的系统广播消息,SSB覆盖区域之间的数据发送是时分的,即在不同的时刻进行发送。例如, 假设小区包括4个SSB覆盖区域,每个SSB的发送调度系统广播消息的候选时间有2个,在一个广播信息监测时机窗中,包含8个监测时机,则每个SSB覆盖区域有2个监测时机,此时为使得基站调度的灵活性,发送每个SSB覆盖区域对应的广播信息时,只要在其中一个监测时机上,将广播信息的调度信息发送给终端即可。需要说明的是,在监测时机上发送的调度信息,用于指示基站发送该SSB覆盖区域下的广播信息对应的物理下行共享信道(Physical Downlink Shared Channel,PDSCH)调度信息,包括PDSCH的时域和频域位置,调制编码格式和冗余版本等。
广播组播业务是5G需要支持的重要多媒体业务,从业务类型来看,包括流媒体类,如音频广播和电视直播等;从数据类型来看,包括如用于软件升级的数据文件;从公共安全类来看,包括如地震、海啸,或者公共卫生安全等信息。而不同的业务对应不同的时延要求且数据速率有大有小,这相对于系统广播信息而言,具有业务质量要求不同和速率不同等特点,特别是电视直播业务,需要更高的业务速率和传输质量要求。此外,在发送方式上,广播组播祖业的传输包括PTP和PTM两个方式,其中PTM方式指基站建立一个无线承载,单点发送,多个终端同时接收,该方式适用于有多个终端(如超过10个终端)接收广播组播业务数据;PTP方式指基站为每个终端建立一个无线承载,该方式适用于少量用户接收广播组播业务数据。
此外,在NR系统中,一个小区支持多波束(beam)发送,在终端和基站发送控制信道和业务信道数据时,需要明确发送的波束,以便接收端能够接收该数据。如当终端在SSB1的覆盖区域时,基站发送物理下行控制信道(physical downlink control channel,PDCCH)时,其发送beam和SSB1保持一致(即PDCCH和SSB1具有准共址(Quasi Co-Location,QCL)关系,即发送PDCCH天线端口符号上的信道特性可以从发送SSB1的天线端口推导出)。当终端从SSB1的覆盖区域移动到SSB2的覆盖区域时,基站发送PDCCH时,其发送beam需要调整到SSB2的方向上(即PDCCH和SSB2具有QCL关系)。这种PDCCH和某个SSB的QCL关系采用传输配置指示(Transmission  Configuration Indication,TCI)状态,当终端从SSB1移动到SSB2时,基站通过媒体访问控制-控制单元(MAC-CE)消息发送TCI状态指示信息。
另外,当发生PTP和PTM传输方式的转换时,PTP到PTM的切换指示及建立PTM的传统的过程为:发送节点在多播控制信道(MCCH)中指示传输方式,即PTM方式;然后接收节点(终端)释放PTP链接,在MCCH上指示PTM配置信息;再然后发送节点根据PTM配置信息接收多播广播业务数据。PTM到PTP的切换指示及建立PTP的传统的过程为:发送节点在MCCH中指示传输方式,即PTP方式;然后接收节点释房PTM配置信息;再然后如果是空闲态,则进行随机过程进入链接态,并建立PTP连接,建立数据传输。
具体的,在使用MCCH指示PTP和PTM之间的切换时用一个字段进行指示,指示某个特定的广播组播业务的传输方式,如当指示PTP时,表示本小区某特定广播组播业务采用PTP的方式;当指示PTM时,表示本小区某特定广播组播业务采用PTM的方式。
但是仅采用MCCH来指示PTP/PTM切换,存在如下缺点:其一,切换指示滞后,不能快速响应对传输方式切换的要求。PTP/PTM的切换主要应用场景是使得资源利用率最好。一方面,当接收广播组播的业务用户数和信道变化时需要进行切换,当基站通信的负载发生变化时也可能需要进行切换。MCCH的响应时间依赖于MCCH的配置的内容修改周期,比较常用的配置周期是百毫秒或者是1-2秒,时延比较大(需要说明的是,配置较短MCCH内容修改周期,需要终端不断的接收MCCH数据,即浪费空口的资源,也不利于终端省电)。其二,以小区为单位的切换指示,会对空口造成浪费。例如当有多个终端在SSB1的覆盖区域满足PTM时,该小区的所有SSB的覆盖区,都采用PTM,这种操作会造成资源上的浪费。针对此,本公开提供如下实施例:
如图1所示,为本公开实施例中广播组播的传输方式切换方法的步骤流程图,该方法包括如下步骤:
步骤101:获取广播组播业务的目标传输方式,并获取目标传输方式的配置信息。
具体的,广播组播业务的目标传输方式为PTP方式或者PTM方式。
此外,终端在获取广播组播业务的目标传输方式时,目标传输方式的获取方式可以包括下述中的任意一项:
获取基站在DCI中所指示的目标传输方式、获取基站在MCCH中所指示的目标传输方式、获取基站通过MAC-CE所指示的目标传输方式、通过预设定时器获取目标传输方式。
即可以通过控制信道的DCI、MAC-CE、MCCH或者通过预设定时器对广播组播业务的目标传输方式进行指示,从而避免传输方式切换指示滞后,使得能够快速响应对广播组播业务的传输方式切换的要求。
此外,具体的,目标传输方式的配置信息可以包括下述任意一项:控制信道检测时机、PDSCH速率匹配信息、部分带宽(band width part,BWP)信息。
步骤102:基于目标传输方式的配置信息接收广播组播业务。
在本步骤中,具体的,在获取目标传输方式的配置信息之后,可以直接基于目标传输方式的配置信息接收广播组播业务。
例如,若目标传输方式为PTP方式,则基于PTP方式的配置信息接收广播组播业务,若目标传输方式为PTM方式,则基于PTM方式的配置信息接收广播组播业务,从而保证了广播组播业务的正确接收过程。
这样,本实施例通过采用DCI、MCCH、MAC-CE或预设定时器的方式进行广播组播业务的目标传输方式的确定,即进行PTM/PTP方式的切换,使得广播组播业务的传输方式的切换更加灵活,有效节约了空口资源。
进一步地,下面分别对目标传输方式的每一种获取方式进行说明。
其一,针对通过DCI进行目标传输方式的指示的方式:
其中,终端在获取基站在DCI中所指示的目标传输方式时,可以包括如下任一种方式:
(1)接收基站通过专用DCI信令发送的第一指示信息,其中第一指示信息中包含有广播组播业务识别标识号和目标传输方式的标识信息。
需要说明的是,专用DCI是指用于指示广播组播业务传输方式的一种DCI格式,通过配置特殊的无线网络临时标识(RNTI)来区别现有的其他DCI格 式,如定义模式转换-无线网络临时标识(ms-RNTI)。此时发送端使用ms-RNTI对PDCCH信道上传输的DCI进行加扰处理,接收端使用ms-RNTI进行PDCCH检测和解扰,终端可以得到目标传输方式的指示信息,进行PTP/PTM转换。
此外,专用DCI格式中包括广播组播业务识别标识字段和目标传输方式的标识字段,其中广播组播业务识别标识字段用于标识广播组播业务识别标识号,目标传输方式的标识字段用于标识目标传输方式,例如可以采用0标识PTM方式,1标识PTP方式,或者采用1标识PTM方式,0标识PTP方式,在此不在此进行具体限定。
此外,具体的,当广播组播业务为基于小区或SSB覆盖区域进行配置的至少两个业务时,第一指示信息为位图指示信息,且位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
例如,广播组播业务可以用临时移动组标识(TMGI)进行标识,且配置顺序可以为:TMGI-1,TMGI-2,TMGI-3…TMGI-N,此时在专用DCI信令中,位图中每个比特位对应一广播组播业务的目标传输方式,即位图指示相应TMGI的传输方式,每比特位顺序对应配置的广播组播业务,具体如图2所示。在图2中,通过位图指示方式指示了标识为TMGI-1至TMGI-12的广播组播业务的目标传输方式,其中0表示PTM方式,1表示PTM方式。
另外,具体的,当广播组播业务为基于小区或SSB覆盖区域进行配置的至少两个业务,且专用DCI信令承载的比特数小于配置的总的广播组播业务数时,第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
例如,若总共配置了M个需要通过专用DCI信令指示的广播组播业务,专用DCI信令承载的最大比特数为N,且M>N,此时采用的分组方式可以为:
将M分成L组,L-1个组中每组包含K个业务
Figure PCTCN2021095656-appb-000001
第L组包含(M-K*(L-1))个业务,其中
Figure PCTCN2021095656-appb-000002
表示向上取整。此外,在N比特位图中,
Figure PCTCN2021095656-appb-000003
Figure PCTCN2021095656-appb-000004
表示分组号,K表示K个业务对应的传输方式。
此外,在基站配置M和N数值后,终端和基站确定L和K的数值方法为:满足
Figure PCTCN2021095656-appb-000005
等式成立的情况下,L取数组{1,2,3…N-1}中最小数值。举例如下:
例如,当N=16,M<=16时,L=1,分组数为1,指示方式是不进行分组的一种特殊情况。
再例如,如图3所示,当N=16,M=25时,L=2,分组数为2,专用DCI的16比特中,1比特表示组号,剩余15比特采用位图的方式指示相应广播组播业务的传输方式;即图3中的一组位图指示信息中,指示组号为0的一组广播组播业务的传输方式。
再例如,如图4所示,当N=16,M=40时,L=3,分组数为3,专用DCI的16比特中,2比特表示组号,剩余14比特采用位图的方式指示相应广播组播业务的传输方式;即图4中的一组位图指示信息中,指示组号为2(对应01)的一组广播组播业务的传输方式。
这样,通过位图的方式指示广播组播业务的目标传输方式,减少了专用DCI的开销。
(2)接收基站通过广播组播的DCI发送的第二指示信息,其中第二指示信息用于指示广播组播业务的传输方式由当前传输方式切换至目标传输方式。
具体的,在通过广播组播的DCI指示第二指示信息时,当广播组播业务的当前传输方式为PTP方式时,在单播调度的DCI中指示第二指示信息,当广播组播业务的当前传输方式为PTM时,在多播调度的DCI中指示第二指示信息。
此外,具体的,广播组播的DCI包含第二指示信息的方式可以包括:
广播组播的DCI中新增有指示字段,且指示字段中包含有第二指示信息;或者,广播组播的DCI中的目标原有字段的含义重定义为第二指示信息。
具体的,在DCI中新增指示字段时,需要增加原有DCI的内容信息,相关DCI的总size(尺寸大小,所有信息字段位数之和)增加。例如DCI中增加1比特指示第二指示信息(如:0表示保持当前方式不变,1表示发送方式进行转 换,或者相反),即指示广播组播业务的传输方式由当前传输方式切换至目标传输方式,该方式实现过程简单。
此外,具体的,目标原有字段包括下述的任意一项:DCI指示格式、PUCCH功率控制参数、HARQ进程号、频域资源分配指示(如:使用频域资源指示中不会用到的组合,如:全“1”)、时域资源分配指示。即通过修改上述任一一项目标原有字段的原始含义,将上述目标原有字段的原始含义重定义为第二指示信息,这样有利于终端进行信道检测,减少信道检测能力的要求。
这样,通过上述两种方式中的任一种方式实现了通过DCI的方式进行目标传输方式的指示。
此外,在此需要说明的是,当目标传输方式为PTM方式时,用于指示目标传输方式的DCI中还包含有载波指示信息和/或BWP信息。这样使得在用于传输广播组播业务的PDSCH和PDCCH发送的载波在不同的载波或者BWP上时,终端能够根据DCI中的载波指示信息接收相应的PDSCH。
其二,针对通过MCCH进行目标传输方式的指示的方式:
其中,终端在获取基站在MCCH中所指示的目标传输方式时,可以接收基站通过MCCH周期性发送的第三指示信息。
具体的,第三指示信息中包含有广播组播业务的目标传输方式、发送广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
例如,第三指示信息包含的内容举例如下:
TMG1=1,表示广播组播业务识别号为1;
Cell ID=3,表示小区标识号为3;
SSB index=0,mode=PTP,表示SSB覆盖区域的索引号为0时,目标传输方式为PTP方式;
SSB index=1,mode=PTM,表示SSB覆盖区域的索引号为1时,目标传输方式为PTM方式;
SSB index=2,mode=PTM,表示SSB覆盖区域的索引号为2时,目标传输方式为PTM方式;
SSB index=3,mode=PTP,表示SSB覆盖区域的索引号为3时,目标传输方式为PTP方式。
上述举例定义了广播组播业务识别号为1在小区3中发送,其中小区3的SSB0下采用PTP的传输方式发送,小区3的SSB1下采用PTM的传输方式发送,小区3的SSB2下采用PTM的传输方式发送,小区3的SSB3下采用PTP的传输方式发送。
这样,通过上述MCCH的方式周期性指示目标传输方式,使得新接入接收广播组播业务的终端能够获取特定广播组播业务的传输方式。
其三,针对通过MAC-CE进行目标传输方式的指示的方式:
其中,终端在获取基站通过MAC-CE所指示的目标传输方式时,可以接收基站通过MAC-CE发送的第四指示信息。
具体的,第四指示信息包括控制资源集合识别号和传输配置指示(TCI)状态识别号,其中TCI状态识别号与SSB索引号相关联。
具体的,对于通过MAC-CE进行目标传输方式的指示的方式,其主要应用场景为终端从一个SSB覆盖区域移动到另一个SSB覆盖区域。当终端从一个SSB覆盖区域(如SSB-index=1)移动到另外一个SSB覆盖区(如SSB-index=2)时,可以通过MAC-CE发送的第四指示信息对广播组播业务的目标传输方式进行指示。此时,MAC-CE的字段内容如下表所示:
Figure PCTCN2021095656-appb-000006
当检测传输广播组播数据的控制信道的资源集合(PTP或者PTM的控制资源集合)关联的SSB索引发生了变化时,基于MCCH周期性指示了SSB覆盖区域所对应的广播组播传输方式,使得某个SSB索引有对应的广播组播 传输方式,从而使得终端能够通过变化了的SSB索引号获取相应SSB的广播组播业务的目标传输方式。即当SSB索引转换之前对应的SSB的广播组播传输方式是PTM方式,SSB索引转换之后对应的SSB的广播组播传输方式是PTP,则表示切换到PTP模式。
其四,针对通过预设定时器进行目标传输方式的指示的方式:
其中,终端在通过预设定时器获取目标传输方式时,可以当终端在预设定时器的定时时长内未接收到广播组播的DCI时,将广播组播业务的目标传输方式确定为除当前传输方式之外的另一种传输方式,即进行传输方式的切换。
具体的,当广播组播的业务发送处于某种方式时,终端在相应方式的检测机会上检测相应的控制信道,当在一定的时长内,没有收到任何广播组播的控制信息(可能是基站发送了通知,但终端没有检测到),则认为广播组播的传输方式发生了变化,则终端切换到另外一种传输方式的检测机会上检测相应的控制信道。
通过预设定时器进行目标传输方式的指示,使得在终端接收不到信息的情况下同样能够进行传输方式的切换。
这样,上述实施例实现了通过DCI、MCCH、MAC-CE或预设定时器的方式进行广播组播业务的目标传输方式的指示,即实现了广播组播业务的传输方式的切换指示,相当于现有技术,使得传输方式的切换更加灵活,有效节约了空口资源。
还需要说明的是,当终端处于连接态时,终端通过对相邻SSB测量,并将测量结果上报给基站,由基站确定终端进行SSB切换的时机,从而保证在特定的SSB覆盖区域中有效进行PTP/PTM切换。当终端处于空闲态时,终端只能接收PTM方式发送的广播组播业务,当由于移动更换SSB覆盖区域时,自行根据移动性测量结果进行SSB覆盖区域的选择。
进一步地,本实施例在获取目标传输配置信息时,可以在获取广播组播业务的目标传输方式之前,接收基站通过高层信令发送的所述PTP方式的配置信息以及所述PTM方式的配置信息;或者,在获取广播组播业务的目标传 输方式之后,接收基站所发送的目标传输方式的配置信息。
即基站可以通过高层信令提前将PTM和PTP的配置信息发送给终端,在终端获取到广播组播业务的目标传输方式之后直接应用PTM或PTP的配置信息,而不用重新从基站获取,从而使得能够进一步减少传输方式转换的时延。当然,基站也可以在获取广播组播业务的目标传输方式之后,再接收基站发送的目标传输方式的配置信息,以避免接收无效的传输方式的配置信息。
此外,具体的,配置信息包括相对应传输方式的控制信道检测时机和/或PDSCH的速率匹配信息。
另外,在此需要说明的是,控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
此外,进一步地,在本实施例中,当目标传输方式为PTP方式且终端处于空闲态时,终端可以接收基站配置的用于建立PTP的随机接入信道RACH资源;或者,当目标传输方式为PTP方式且终端处于空闲态时,终端可以生成随机数,并当随机数大于预设接入因子时进行随机接入过程。
在此需要说明的是,该RACH资源为额外的RACH资源,可以通过广播或组播消息配置,从而使得终端能够在额外配置的RACH资源上发起随机接入过程,避免网络瞬时堵塞的问题。
这样避免了当广播组播业务的传输方式为PTP方式且存在大量的空闲的终端需要进行随机接入过程时导致的网络瞬间堵塞的问题。
另外,进一步地,在本实施例中,广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。这使得传输方式的指示粒度为SSB覆盖区域级的,相比较小区级而言,其颗粒度更细,进一步节省了空口资源。
本实施例提供的广播组播业务传输方式的切换方法,通过采用DCI、MCCH、MAC-CE或预设定时器的方式进行广播组播业务的目标传输方式的确定,即进行PTM/PTP方式的切换,使得广播组播业务的传输方式的切换更 加灵活,有效节约了空口资源。
如图5所示,为本公开实施例中应用于基站的广播组播业务传输方式的切换方法的步骤流程图,该方法包括如下步骤:
步骤501:将广播组播业务的目标传输方式发送给终端,并将目标传输方式的配置信息发送给终端。
在本步骤中,基站通过将广播组播业务的目标传输方式发送给终端,并将目标传输方式的配置信息发送给终端,使得终端能够基于目标传输方式的配置信息接收所述广播组播业务。
具体的,广播组播业务的目标传输方式为PTP方式或者PTM方式。
此外,将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项:通过DCI将目标传输方式发送给终端、通过MCCH将目标传输方式发送给终端、通过MAC-CE将目标传输方式发送给终端。
即基站可以通过DCI、MAC-CE或MCCH对广播组播业务的目标传输方式进行指示,从而避免传输方式切换指示滞后,使得能够快速响应对广播组播业务的传输方式切换的要求。
此外,具体的,目标传输方式的配置信息可以包括控制信道检测时机和/或PDSCH的速率匹配信息。
这样,本实施例通过采用DCI、MCCH或MAC-CE进行广播组播业务的目标传输方式的指示,即进行PTM/PTP方式的切换,使得广播组播业务的传输方式的切换更加灵活,有效节约了空口资源。
进一步地,下面分别对目标传输方式的每一种指示方式进行说明。
其一,针对通过DCI进行目标传输方式的指示的方式:
其中,基站通过DCI将目标传输方式发送给终端时,可以包括如下任一种方式:
(1)通过专用DCI信令发送第一指示信息,其中第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息。
具体的,当广播组播业务为基于小区或SSB覆盖区域进行配置的至少两个业务时,第一指示信息为位图指示信息,且位图指示信息中每个比特位对 应一广播组播业务的目标传输方式。
此外,具体的,当广播组播业务为基于小区或SSB覆盖区域进行配置的至少两个业务,且专用DCI信令承载的比特数小于配置的总的广播组播业务数时,第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
(2)通过广播组播的DCI发送第二指示信息,其中第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
具体的,广播组播的DCI包含第二指示信息的方式可以包括:广播组播的DCI中新增有指示字段,且指示字段中包含有第二指示信息;或者,广播组播的DCI中的目标原有字段的含义重定义为第二指示信息。
此外,具体的,目标原有字段包括下述的任意一项:DCI指示格式、PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
此外,在此需要说明的是,当目标传输方式为PTM方式时,用于指示目标传输方式的DCI中还包含有载波指示信息。
其二,针对通过MCCH进行目标传输方式的指示的方式:
其中,通过MCCH将目标传输方式发送给终端时,可以通过MCCH周期性发送的第三指示信息。
其中第三指示信息中包含有广播组播业务的目标传输方式、发送广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
这样,通过上述MCCH的方式周期性指示目标传输方式,使得新接入接收广播组播业务的终端能够获取特定广播组播业务的传输方式。
其三,针对通过MAC-CE进行目标传输方式的指示的方式:
其中,基站在通过MAC-CE将所述目标传输方式发送给终端时,可以通过MAC-CE发送第四指示信息,
其中第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
这样,上述实施例实现了通过DCI、MCCH或MAC-CE方式进行广播组 播业务的目标传输方式的指示,即实现了广播组播业务的传输方式的切换指示,相当于现有技术,使得传输方式的切换更加灵活,有效节约了空口资源。
在此需要说明的是,针对上述任一方式的具体内容可以参见终端侧方法实施例的相关内容,在此不再进行具体赘述。
进一步地,本实施例在将目标传输方式的配置信息发送给终端时,可以在将广播组播业务的目标传输方式发送给终端之前,通过高层信令将PTP方式的配置信息以及所述PTM方式的配置信息发送给终端;或者,在将广播组播业务的目标传输方式发送给终端之后,将目标传输方式的配置信息发送给终端;其中,配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
另外,在此需要说明的是,控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
此外,进一步地,在本实施例中,当目标传输方式为PTP方式且终端处于空闲态时,基站还可以配置终端用于建立PTP的随机接入信道RACH资源。
另外,进一步地,在本实施例中,广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。这使得传输方式的指示粒度为SSB覆盖区域级的,相比较小区级而言,其颗粒度更细,进一步节省了空口资源。
在此需要说明的是,上述实施例的具体内容可以参见终端侧的方法实施例的相关内容,在此不再进行赘述。
本实施例提供的广播组播业务传输方式的切换方法,通过采用DCI、MCCH或MAC-CE的方式进行广播组播业务的目标传输方式的指示,使得广播组播业务的传输方式的切换更加灵活,有效节约了空口资源。
下面通过具体实施例对本公开进行具体说明。
第一实施例:
在该实施例中,通过专用DCI信令指示广播组播业务的目标传输方式,具体包括如下步骤:
步骤1,基站通过专用DCI信令指示广播组播业务的目标传输方式。
具体的,专用DCI信令是指用于指示广播组播业务传输方式的一种DCI格式,该格式可以通过配置特殊的无线网络临时标识(RNTI)来区别现有其他DCI格式,如定义模式转换无线网络临时标识(ms-RNTI),此时发送端(可以为基站)使用ms-RNTI对PDCCH信道上传输的DCI进行加扰处理,接收端(可以为终端)使用ms-RNTI进行PDCCH检测和解扰,从而获得PTP/PTM转换信息。具体的,专用DCI信令格式的内容包括如下:
广播组播业务识别标识字段,该字段用于表示广播组播业务识别号;
目标传输方式的标识字段,该字段用于标识目标传输方式,例如可以采用“0”标识PTM方式,“1”标识PTP方式,或者采用“1”标识PTM方式,“0”标识PTP方式,在此并不对此进行具体限定。
进一步地,为了减少专用DCI信令的开销,可采用位图指示广播组播业务的目标传输方式,具体指示方式如下:
当广播组播业务是基站通过广播信道(BCCH)或者多播控制信道(MCCH)或者RRC信令配置的本小区或某SSB覆盖区域内的至少两个业务时,该些业务可以用临时移动组标识(TMGI)进行标识,且配置顺序可以为:TMGI-1,TMGI-2,TMGI-3…TMGI-N,此时在专用DCI信令中,位图中每个比特位对应一广播组播业务的目标传输方式,即位图指示相应TMGI的传输方式,每比特位顺序对应配置的广播组播业务,具体如图2所示。在图2中,0表示PTM方式,1表示PTM方式。
此外,当专用DCI信令承载的比特数小于配置的总的广播组播业务数时,可采用分组指示的方式,即在专用DCI信令中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。例如,若总共配置了M个需要通过专用DCI信令指示的广播组播业务,专用DCI信令承载的最大比特数为N,且M>N,此时采用的分组方式可以为:
将M分成L组,L-1个组中每组包含K个业务
Figure PCTCN2021095656-appb-000007
第L组包含(M-K*(L-1))个业务。此外,在N比特位图中,
Figure PCTCN2021095656-appb-000008
Figure PCTCN2021095656-appb-000009
表示分组号,K表示K个业务对应的传输方式。
此外,在基站配置M和N数值后,终端和基站确定L和K的数值方法为:满足
Figure PCTCN2021095656-appb-000010
等式成立的情况下,L取数组{1,2,3…N-1}中最小数值。举例如下:
例如,当N=16,M<=16时,L=1,分组数为1,指示方式是不进行分组的一种特殊情况。
再例如,如图3所示,当N=16,M=25时,L=2,分组数为2,专用DCI的16比特中,1比特表示组号,剩余15比特采用位图的方式指示相应广播组播业务的传输方式;即图3中的一组位图指示信息中,指示组号为0的一组广播组播业务的传输方式。
再例如,如图4所示,当N=16,M=40时,L=3,分组数为3,专用DCI的16比特中,2比特表示组号,剩余14比特采用位图的方式指示相应广播组播业务的传输方式;即图4中的一组位图指示信息中,指示组号为2(对应01)的一组广播组播业务的传输方式。
这样,通过上述分组方式,使得在N数值确定的情况下,基站和终端能够根据M的数值的变化,自适应进行分组表示广播组播业务的目标传输方式。
步骤2,终端获取相应广播组播业务的传输方式的配置信息。
具体的,配置信息包括相对应传输方式的控制信道检测时机和/或PDSCH的速率匹配信息。
控制信道检测时机是指终端接收广播组播业务时,在哪些时间(时隙或者符号)上检测控制信道。基站根据业务特点配置检测时机,可以使终端在特定的时间上接收控制信道,起到节电的效果。在此需要说明的是,检测时机可以基于单个业务进行配置(如和TMGI相关联),也可以基于一组业务进行配置。当然,其该配置信息可以通过RRC信令或广播信令或组播信令进行配置。
PDSCH的速率匹配信息是指基站发送调度广播组播的PDSCH数据时,其调度的频域或时间资源中扣除掉部分PDSCH不能占用的资源单元,这样使得能够保证基站调用的灵活性。需要说明的是,这些不能被调用占用的资源(时间信息和频域信息)通过RRC信令或广播信令或组播信令进行配置。此外, 相对于PTP调度的速率匹配信息,PTM的速率匹配信息进行单独配置,即配置生效于一组终端。
此外,该步骤2可以在步骤1之后进行,即基站根据广播组播业务的目标传输方式发送该目标传输方式的配置信息。当然,该步骤也可以在步骤1之前进行,即基站将PTP方式的配置信息和PTM方式的配置信息均配置给终端,终端根据目标传输方式选择目标传输方式的配置信息。
步骤3:基于目标传输方式的配置信息进行广播组播业务的接收。
具体的,终端可以根据目标传输方式的配置信息,检测调度信令DCI,并根据DCI指示,在本载波或其他载波上接收PDSCH数据。
此外,终端针对不同的传输方式采用不同的接收处理,具体接收处理方式如下:
当目标传输方式为PTM方式时,终端开始在PTM方式配置的检测时机上检测控制信道。当检测到相应的调度信息时,以组调度的格式进行DCI解析,如当DCI中含有速率匹配指示,则按照PTM方式配置的速率匹配信息进行解析,并停止在PTP方式配置的检测时机上检测控制信道。
当目标传输方式为PTP时,终端开始在PTP方式配置的检测时机上检测控制信道,当检测到相应的调度信息时,以单播调度的格式进行DCI解析,如当DCI中含有速率匹配指示,则按照PTP方式配置的速率匹配信息进行解析,并停止在PTM方式配置的检测时机上检测控制信道。
具体的,为了增加基站调度的灵活性,当目标传输方式为PTM方式时,其组调度信息的DCI中包含有载波指示信息(即PDSCH和PDCCH发送的载波在不同的载波上),此时终端根据配置的载波指示信息接收相应的PDSCH。
第二实施例:
在该实施例中,通过广播组播调度的DCI信令指示广播组播业务的目标传输方式,具体包括如下步骤:
步骤1,基站通过广播组播调度的DCI信令指示广播组播业务的目标传输方式。
具体的,当广播组播的DCI支持指示广播组播业务的传输方式发生改变时,可以采用如下任一种方式:
其一,增加用于指示广播组播业务的传输方式由当前传输方式切换至目标传输方式的指示字段。
该种方式下,需要增加原有DCI的内容信息,相关DCI的总size(尺寸大小,所有信息字段位数之和)增加)。例如DCI中增加1比特指示将要进行PTP或PTM方式的切换。该方式实现过程简单。
其二、将广播组播的DCI中的目标原有字段的含义重定义为第二指示信息,第二指示信息用于指示广播组播业务的传输方式由当前传输方式切换至目标传输方式。
这种情况,修改原有DCI的内容含义,DCI的总SIZE不变。该方式有利于终端进行信道检测,减少对信道检测能力的要求。
具体的,目标原有字段包括下述的任意一项:
DCI指示格式、PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
具体的,如下表所示,广播组播调度的信令内容如下表所示,
Figure PCTCN2021095656-appb-000011
Figure PCTCN2021095656-appb-000012
具体的,在通过“频域资源分配指示”或者“时域资源分配指示“字段的特定组合,表示传输方式的切换时,可以当频域资源分配指示全为1时表示本广播组播业务的传输模式切换,当时域资源分配指示全为0时表示本广播组播业务的传输模式切换,当前在此并不对此进行具体限定。
此外,为了增加基站调度的灵活性,当目标传输方式为PTM方式时,其组调度信息的DCI中包含有载波指示信息(即PDSCH和PDCCH发送的载波在不同的载波上),此时终端根据配置的载波指示信息接收相应的PDSCH。具体的,该载波指示信息也可以通过两种方式进行指示,其一为新增信息字段,其二为重定义DCI中原有字段的含义。
在此对重定义DCI原有字段指示载波指示信息说明如下:
如上述表述中,1比特长度的DCI格式指示(DCI formats),当DCI是非广播组播时(这里的非广播组播DCI是指现有调度信令格式DCI,如以C-RNTI、CS-RNTI、MCS-RNTI为扰码调度的单播数据),用于指示是上行还是下行调度。当DCI是广播组播时(这里的广播组播DCI是使用“不同于现有单播RNTI”为信道扰码调度的广播或者组播数据,如:G-RNTI),只有下行调度,因此该比特信息可用于指示载波指示信息。
此外,如上述表格中,2比特的PUCCH功率控制参数,当DCI是非广播组播时用于指示上行功率参数。当DCI是广播组播时由于是组调度,功率控制参数需要用其它方式进行(如基于各终端的下行路径损耗),其上行PUCCH的功率控制参数可以省略,此时可以用于指示载波指示信息。
步骤2:终端获取目标传输模式的配置信息。
该步骤与第一实施例的步骤2相同,在此不再进行赘述。
此外,需要说明的是,当广播组播的传输方式由PTM切换到PTP时,如果存在大量的空闲态的终端需要建立连接,也就是说有大量的终端进行随机接入过程,这会导致网络瞬间拥塞,此时本实施例可以通过下述方式解决问题:
其一,配置额外的RACH资源,即当目标传输方式为PTP方式且终端处于空闲态时,可以接收基站配置的用于建立PTP的RACH资源。具体的,通过广播或者组播消息配置一些额外的RACH接入资源,网络指示切换到PTP时,同时指示这些RACH资源生效,需要因为接收广播组播业务而建立连接的终端,部分或者全部终端在额外配置PRACH资源上发起随机接入。为了减少资源浪费,基站指示额外RACH资源有效时期,即在有效期,终端可以使用额外配置的RACH资源发起随机接入。其额外RACH资源,可以是单独配置的RACH资源,也可以是基站在原有配置的RACH资源但被MASK(屏蔽)掉的RACH资源。
其二,设置接入因子,即当目标传输方式为PTP方式且终端处于空闲态时,终端生成随机数,并当随机数大于预设接入因子时进行随机接入过程,否则等待一定时长后再发起随机接入。
步骤3:根据目标传输方式的配置信息进行广播组播业务的接收。
具体的,终端根据目标传输方式的配置信息检测调度信令DCI,并根据DCI指示在本载波或其他载波上接收PDSCH数据。
当DCI解析结果为发生PTP时,终端开始在为PTP方式配置的检测时机上检测控制信道,同时停止在为PTM方式配置的检测时机上检测控制信道的行为。
实施例三:
在该实施例中,通过预设定时器指示广播组播业务的目标传输方式。
具体的,基于预设定时器指示广播组播业务的目标传输方式,是对第一实施例和第二实施例的一种补充方式,可以和第一实施例和第二实施例共同使用。当终端由于某种原因漏检广播组播业务的目标传输方式时(如信道质量差,无法正确检测到相关信息,或者因为优先级的问题,终端去接收优先级更高的业务),则基于预设定时器进行目标传输方式的指示。
即当广播组播的业务发送处于某种方式时,终端在相应方式的检测机会上检测相应的控制信道,当在预设定时器的定时时长内,没有收到任何广播组播的控制信息,则认为广播组播的传输方式发生了变化(可能是基站发送了通知,但终端没有检测到),则终端切换到另外一种传输方式的检测机会上检测相应的控制信道。
例如在某一时刻,基站指示某特定广播组播业务以PTM方式发送,终端在PTM方式对应的检测时机上检测广播组播控制信道,启动预设定时器(如定时器时长1秒),并执行如下过程:
在预设定时器超时前,如果接收到广播组播的控制信息,则重启定时,且终端继续在PTM的检测时机上检测广播组播的控制信道;
若预设定时器超时(即在1s内没有收到任何广播组播的控制信息),则确定广播组播业务的目标传输方式为PTP方式,则终端以PTP方式进行广播组播业务的接收。
这样,本公开通过上述实施例实现了广播组播传输方式的灵活切换。
此外,如图6所示,为本公开实施例中应用于终端的广播组播传输方式的切换装置的模块框图,该装置包括:
获取模块601,用于获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;
接收模块602,用于基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;
所述目标传输方式的获取方式包括下述任意一项:获取基站在下行控制信息DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。
可选地,所述获取基站在下行控制信息DCI中所指示的所述目标传输方式,包括:
接收基站通过专用DCI信令发送的第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
接收基站通过广播组播的DCI发送的第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
可选地,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
可选地,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每 组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
可选地,所述广播组播的DCI包含所述第二指示信息的方式包括:
所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
可选地,所述通过预设定时器获取所述目标传输方式,包括:
当终端在所述预设定时器的定时时长内未接收到广播组播的DCI时,将所述广播组播业务的目标传输方式确定为除当前传输方式之外的另一种传输方式。
在此需要说明的是,本实施例所提供的装置能够实现上述终端侧方法实施例所能实现的所有方法步骤,并能够达到相同的技术效果,在此不再进行赘述。
此外,如图7所示,为本公开实施例中应用于基站的广播组播传输方式的切换装置的模块框图,该装置包括:
发送模块701,用于将广播组播业务的目标传输方式发送给终端,并将所述目标传输方式的配置信息发送给所述终端,以使所述终端基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;
将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项:通过下行控制信息DCI将所述目标传输方式发送给终端、通过多播控制信道MCCH将所述目标传输方式发送给终端、通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端。
可选地,所述通过下行控制信息DCI将所述目标传输方式发送给终端,包括:
通过专用DCI信令发送第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
通过广播组播的DCI发送第二指示信息,其中所述第二指示信息用于指 示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
可选地,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
可选地,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
可选地,所述广播组播的DCI包含所述第二指示信息的方式包括:
所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
在此需要说明的是,本实施例所提供的装置能够实现上述基站侧方法实施例所能实现的所有方法步骤,并能够达到相同的技术效果,在此不再进行赘述。
图8为本公开一实施例提供的终端的结构示意图,如图8所示,该终端800可以包括:至少一个处理器801、存储器802、至少一个网络接口804和其他的用户接口803。移动终端800中的各个组件通过总线系统805耦合在一起。可理解,总线系统805用于实现这些组件之间的连接通信。总线系统805除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图8中将各种总线都标为总线系统805。
其中,用户接口803可以包括显示器、键盘或者点击设备,例如鼠标,轨迹球(trackball)、触感板或者触摸屏等。
可以理解,本公开实施例中的存储器802可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM, EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DRRAM)。本公开各实施例所描述的系统和方法的存储器802旨在包括但不限于这些和任意其它适合类型的存储器。
在一些实施方式中,存储器802存储了如下的元素,可执行模块或者数据结构,或者他们的子集,或者他们的扩展集,例如:操作系统8021和应用程序8022。
其中,操作系统8021,包含各种系统程序,例如框架层、核心库层、驱动层等,用于实现各种基础业务以及处理基于硬件的任务。应用程序8022,包含各种应用程序,例如媒体播放器(Media Player)、浏览器(Browser)等,用于实现各种应用业务。实现本公开实施例方法的程序可以包含在应用程序8022中。
在本公开实施例中,通过调用存储器802存储的计算机程序或指令,具体的,可以是应用程序8022中存储的计算机程序或指令,处理器801用于:
获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;所述目标传输方式的获取方式包括下述任意一项:获取基站在下行控制信息DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。
上述本公开实施例揭示的方法可以应用于处理器801中,或者由处理器801实现。处理器801可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过处理器801中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器801可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本公开实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本公开实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器802,处理器801读取存储器802中的信息,结合其硬件完成上述方法的步骤。
可以理解的是,本公开描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现,处理单元可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits,ASIC)、数字信号处理器(Digital Signal Processing,DSP)、数字信号处理设备(DSP Device,DSPD)、可编程逻辑设备(Programmable Logic Device,PLD)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本公开所述功能的其它电子单元或其组合中。
对于软件实现,可通过执行本公开实施例中所述功能的模块(例如过程、函数等)来实现所述的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
可选地,作为另一个实施例,处理器801还用于:接收基站通过专用DCI信令发送的第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,接收基站通过广播组播的DCI发送的第二指示信息,其中所述第二指示信息用于指示所述广播组播业 务的传输方式由当前传输方式切换至所述目标传输方式。
可选地,作为另一个实施例,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
可选地,作为另一个实施例,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
可选地,作为另一个实施例,所述广播组播的DCI包含所述第二指示信息的方式包括:所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
可选地,作为另一个实施例,所述目标原有字段包括下述的任意一项:DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
可选地,作为另一个实施例,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
可选地,作为另一个实施例,处理器801还用于:接收基站通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
可选地,作为另一个实施例,处理器801还用于:接收基站通过MAC-CE发送的第四指示信息,其中所述第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
可选地,作为另一个实施例,处理器801还用于:当终端在所述预设定时器的定时时长内未接收到广播组播的DCI时,将所述广播组播业务的目标 传输方式确定为除当前传输方式之外的另一种传输方式。
可选地,作为另一个实施例,处理器801还用于:在获取广播组播业务的目标传输方式之前,接收基站通过高层信令发送的所述PTP方式的配置信息以及所述PTM方式的配置信息;或者,在获取广播组播业务的目标传输方式之后,接收基站所发送的目标传输方式的配置信息;
其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
可选地,作为另一个实施例,所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
可选地,作为另一个实施例,处理器801还用于:当所述目标传输方式为PTP方式且终端处于空闲态时,接收基站配置的用于建立PTP的随机接入信道RACH资源;或者,当所述目标传输方式为PTP方式且终端处于空闲态时,所述终端生成随机数,并当所述随机数大于预设接入因子时进行随机接入过程。
可选地,作为另一个实施例,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。
本公开实施例提供的终端能够实现前述实施例中终端实现的各个过程,为避免重复,此处不再赘述。
图9为本公开一实施例提供的基站的结构示意图,如图9所示,该基站900可以包括至少一个处理器901、存储器902、至少一个其他的用户接口903,以及收发机904。基站900中的各个组件通过总线系统905耦合在一起。可理解,总线系统905用于实现这些组件之间的连接通信。总线系统905除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图9中将各种总线都标为总线系统905,总线系统可以包括任意数量的互联的总线和桥,具体由处理器901代表的一个或多个处理器和存储器902代表的存储器的各种电路链接在一起。总线系统还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都 是本领域所公知的,因此,本公开实施例不再对其进行进一步描述。总线接口提供接口。收发机904可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口903还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
可以理解,本公开实施例中的存储器902可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DRRAM)。本公开各实施例所描述的系统和方法的存储器902旨在包括但不限于这些和任意其它适合类型的存储器。
处理器901负责管理总线系统和通常的处理,存储器902可以存储处理器901在执行操作时所使用的计算机程序或指令,具体地,处理器901可以用于:将广播组播业务的目标传输方式发送给终端,并将所述目标传输方式的配置信息发送给所述终端,以使所述终端基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
所述目标传输方式为点对点PTP方式或点对多点PTM方式;将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项:通过下行控制信息DCI将所述目标传输方式发送给终端、通过多播控制信道MCCH将所述 目标传输方式发送给终端、通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端。
上述本公开实施例揭示的方法可以应用于处理器901中,或者由处理器901实现。处理器901可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过处理器901中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器901可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本公开实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本公开实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器902,处理器901读取存储器902中的信息,结合其硬件完成上述方法的步骤。
可以理解的是,本公开描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现,处理单元可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits,ASIC)、数字信号处理器(Digital Signal Processing,DSP)、数字信号处理设备(DSP Device,DSPD)、可编程逻辑设备(Programmable Logic Device,PLD)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本公开所述功能的其它电子单元或其组合中。
对于软件实现,可通过执行本公开实施例中所述功能的模块(例如过程、函数等)来实现所述的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
可选地,作为另一个实施例,处理器901还用于:通过专用DCI信令发送第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号 和所述目标传输方式的标识信息;或者,通过广播组播的DCI发送第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
可选地,作为另一个实施例,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
可选地,作为另一个实施例,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
可选地,作为另一个实施例,所述广播组播的DCI包含所述第二指示信息的方式包括:所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
可选地,作为另一个实施例,所述目标原有字段包括下述的任意一项:DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
可选地,作为另一个实施例,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
可选地,作为另一个实施例,处理器901还用于:通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
可选地,作为另一个实施例,处理器901还用于:通过MAC-CE发送第四指示信息,其中所述第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
可选地,作为另一个实施例,处理器901还用于:在将广播组播业务的目标传输方式发送给终端之前,通过高层信令将所述PTP方式的配置信息以及所述PTM方式的配置信息发送给终端;或者,在将广播组播业务的目标传输方式发送给终端之后,将所述目标传输方式的配置信息发送给终端;
其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
可选地,作为另一个实施例,所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
可选地,作为另一个实施例,处理器901还用于:当所述目标传输方式为PTP方式且终端处于空闲态时,配置所述终端用于建立PTP的随机接入信道RACH资源。
可选地,作为另一个实施例,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。
本公开实施例提供的基站能够实现前述实施例中基站实现的各个过程,为避免重复,此处不再赘述。
上述主要从电子设备的角度对本公开实施例提供的方案进行了介绍。可以理解的是,本公开实施例提供的电子设备为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本公开中所公开的实施例描述的各示例的单元及算法步骤,本公开能够以硬件或硬件和计算机软件的结合形式来实现。
某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本公开的范围。
本公开实施例可以根据上述方法示例对电子设备等进行功能模块的划分,例如,可以对应各个功能划分各个功能模块,也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现,也 可以采用软件功能模块的形式实现。
需要说明的是,本公开实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,仅以上述各功能模块的划分进行举例说明,实际应用中,可以根据需要而将上述功能分配由不同的功能模块完成,即将装置的内部结构划分成不同的功能模块,以完成以上描述的全部或者部分功能。上述描述的系统,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本公开所提供的几个实施例中,应该理解到,所揭露的装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述模块或单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本公开各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器执行本公开各个实施例所述方法的全部或部分步骤。所述计算机存储介质是非短暂性(英文:nontransitory)介 质,包括:快闪存储器、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
另一方面,本公开实施例还提供一种计算机程序产品,所述计算机程序产品包括存储在非暂态计算机可读存储介质上的计算机程序,所述计算机程序包括程序指令,当所述程序指令被计算机执行时,计算机能够执行上述各方法实施例所提供的方法。
另一方面,本公开实施例还提供一种非暂态计算机可读存储介质,其上存储有计算机程序,该计算机程序被处理器执行时实现上述各实施例提供的方法步骤并能够达到相同的技术效果,在此不再进行赘述。
最后应说明的是:以上实施例仅用以说明本公开的技术方案,而非对其限制;尽管参照前述实施例对本公开进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围。

Claims (82)

  1. 一种广播组播传输方式的切换方法,应用于终端,其特征在于,包括:
    获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;
    基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
    所述目标传输方式为点对点PTP方式或点对多点PTM方式;
    所述目标传输方式的获取方式包括下述任意一项:获取基站在下行控制信息DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。
  2. 根据权利要求1所述的广播组播传输方式的切换方法,其特征在于,所述获取基站在下行控制信息DCI中所指示的所述目标传输方式,包括:
    接收基站通过专用DCI信令发送的第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
    接收基站通过广播组播的DCI发送的第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
  3. 根据权利要求2所述的广播组播传输方式的切换方法,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
  4. 根据权利要求2所述的广播组播传输方式的切换方法,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
  5. 根据权利要求2所述的广播组播传输方式的切换方法,其特征在于,所述广播组播的DCI包含所述第二指示信息的方式包括:
    所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
    所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
  6. 根据权利要求5所述的广播组播传输方式的切换方法,其特征在于,所述目标原有字段包括下述的任意一项:
    DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
  7. 根据权利要求1所述的广播组播传输方式的切换方法,其特征在于,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
  8. 根据权利要求1所述的广播组播传输方式的切换方法,其特征在于,所述获取基站在多播控制信道MCCH中所指示的所述目标传输方式,包括:
    接收基站通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
  9. 根据权利要求1所述的广播组播传输方式的切换方法,其特征在于,所述获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式,包括:
    接收基站通过MAC-CE发送的第四指示信息,其中所述第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
  10. 根据权利要求1所述的广播组播传输方式的切换方法,其特征在于,所述通过预设定时器获取所述目标传输方式,包括:
    当终端在所述预设定时器的定时时长内未接收到广播组播的DCI时,将所述广播组播业务的目标传输方式确定为除当前传输方式之外的另一种传输方式。
  11. 根据权利要求1所述的广播组播传输方式的切换方法,其特征在于,所述获取所述目标传输方式的配置信息,包括:
    在获取广播组播业务的目标传输方式之前,接收基站通过高层信令发送的所述PTP方式的配置信息以及所述PTM方式的配置信息;或者,
    在获取广播组播业务的目标传输方式之后,接收基站所发送的目标传输方式的配置信息;
    其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
  12. 根据权利要求11所述的广播组播传输方式的切换方法,其特征在于,
    所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;
    所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
  13. 根据权利要求1所述的广播组播传输方式的切换方法,其特征在于,还包括:
    当所述目标传输方式为PTP方式且终端处于空闲态时,接收基站配置的用于建立PTP的随机接入信道RACH资源;或者,
    当所述目标传输方式为PTP方式且终端处于空闲态时,所述终端生成随机数,并当所述随机数大于预设接入因子时进行随机接入过程。
  14. 根据权利要求1至13任一项所述的广播组播传输方式的切换方法,其特征在于,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。
  15. 一种广播组播传输方式的切换方法,应用于基站,其特征在于,包括:
    将广播组播业务的目标传输方式发送给终端,并将所述目标传输方式的配置信息发送给所述终端,以使所述终端基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
    所述目标传输方式为点对点PTP方式或点对多点PTM方式;
    将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项: 通过下行控制信息DCI将所述目标传输方式发送给终端、通过多播控制信道MCCH将所述目标传输方式发送给终端、通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端。
  16. 根据权利要求15所述的广播组播传输方式的切换方法,其特征在于,所述通过下行控制信息DCI将所述目标传输方式发送给终端,包括:
    通过专用DCI信令发送第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
    通过广播组播的DCI发送第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
  17. 根据权利要求16所述的广播组播传输方式的切换方法,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
  18. 根据权利要求16所述的广播组播传输方式的切换方法,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
  19. 根据权利要求17所述的广播组播传输方式的切换方法,其特征在于,所述广播组播的DCI包含所述第二指示信息的方式包括:
    所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
    所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
  20. 根据权利要求19所述的广播组播传输方式的切换方法,其特征在于,所述目标原有字段包括下述的任意一项:
    DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
  21. 根据权利要求15所述的广播组播传输方式的切换方法,其特征在于,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
  22. 根据权利要求15所述的广播组播传输方式的切换方法,其特征在于,所述通过多播控制信道MCCH将所述目标传输方式发送给终端,包括:
    通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
  23. 根据权利要求15所述的广播组播传输方式的切换方法,其特征在于,所述通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端,包括:
    通过MAC-CE发送第四指示信息,其中所述第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
  24. 根据权利要求15所述的广播组播传输方式的切换方法,其特征在于,所述将所述目标传输方式的配置信息发送给所述终端,包括:
    在将广播组播业务的目标传输方式发送给终端之前,通过高层信令将所述PTP方式的配置信息以及所述PTM方式的配置信息发送给终端;或者,
    在将广播组播业务的目标传输方式发送给终端之后,将所述目标传输方式的配置信息发送给终端;
    其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
  25. 根据权利要求24所述的广播组播传输方式的切换方法,其特征在于,
    所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;
    所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
  26. 根据权利要求15所述的广播组播传输方式的切换方法,其特征在于, 还包括:
    当所述目标传输方式为PTP方式且终端处于空闲态时,配置所述终端用于建立PTP的随机接入信道RACH资源。
  27. 根据权利要求15至26任一项所述的广播组播传输方式的切换方法,其特征在于,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。
  28. 一种广播组播传输方式的切换装置,应用于终端,其特征在于,包括:
    获取模块,用于获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;
    第一接收模块,用于基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
    所述目标传输方式为点对点PTP方式或点对多点PTM方式;
    所述目标传输方式的获取方式包括下述任意一项:获取基站在下行控制信息DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。
  29. 根据权利要求28所述的广播组播传输方式的切换装置,其特征在于,所述获取基站在下行控制信息DCI中所指示的所述目标传输方式,包括:
    接收基站通过专用DCI信令发送的第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
    接收基站通过广播组播的DCI发送的第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
  30. 根据权利要求29所述的广播组播传输方式的切换装置,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
  31. 根据权利要求29所述的广播组播传输方式的切换装置,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
  32. 根据权利要求29所述的广播组播传输方式的切换装置,其特征在于,所述广播组播的DCI包含所述第二指示信息的方式包括:
    所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
    所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
  33. 根据权利要求32所述的广播组播传输方式的切换装置,其特征在于,所述目标原有字段包括下述的任意一项:
    DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
  34. 根据权利要求28所述的广播组播传输方式的切换装置,其特征在于,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
  35. 根据权利要求28所述的广播组播传输方式的切换装置,其特征在于,所述获取基站在多播控制信道MCCH中所指示的所述目标传输方式,包括:
    接收基站通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
  36. 根据权利要求28所述的广播组播传输方式的切换装置,其特征在于,所述获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式,包括:
    接收基站通过MAC-CE发送的第四指示信息,其中所述第四指示信息包 括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
  37. 根据权利要求28所述的广播组播传输方式的切换装置,其特征在于,所述通过预设定时器获取所述目标传输方式,包括:
    当终端在所述预设定时器的定时时长内未接收到广播组播的DCI时,将所述广播组播业务的目标传输方式确定为除当前传输方式之外的另一种传输方式。
  38. 根据权利要求28所述的广播组播传输方式的切换装置,其特征在于,所述获取所述目标传输方式的配置信息,包括:
    在获取广播组播业务的目标传输方式之前,接收基站通过高层信令发送的所述PTP方式的配置信息以及所述PTM方式的配置信息;或者,
    在获取广播组播业务的目标传输方式之后,接收基站所发送的目标传输方式的配置信息;
    其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
  39. 根据权利要求38所述的广播组播传输方式的切换装置,其特征在于,
    所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;
    所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
  40. 根据权利要求28所述的广播组播传输方式的切换装置,其特征在于,所述装置还包括第二接收模块和生成模块;
    所述第二接收模块用于当所述目标传输方式为PTP方式且终端处于空闲态时,接收基站配置的用于建立PTP的随机接入信道RACH资源;或者,
    所述生成模块用于当所述目标传输方式为PTP方式且终端处于空闲态时,所述终端生成随机数,并当所述随机数大于预设接入因子时进行随机接入过程。
  41. 根据权利要求28至40任一项所述的广播组播传输方式的切换装置,其特征在于,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组 SSB覆盖区域为单位进行配置。
  42. 一种广播组播传输方式的切换装置,应用于基站,其特征在于,包括:
    发送模块,用于将广播组播业务的目标传输方式发送给终端,并将所述目标传输方式的配置信息发送给所述终端,以使所述终端基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
    所述目标传输方式为点对点PTP方式或点对多点PTM方式;
    将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项:通过下行控制信息DCI将所述目标传输方式发送给终端、通过多播控制信道MCCH将所述目标传输方式发送给终端、通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端。
  43. 根据权利要求42所述的广播组播传输方式的切换装置,其特征在于,所述通过下行控制信息DCI将所述目标传输方式发送给终端,包括:
    通过专用DCI信令发送第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
    通过广播组播的DCI发送第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
  44. 根据权利要求43所述的广播组播传输方式的切换装置,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
  45. 根据权利要求43所述的广播组播传输方式的切换装置,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
  46. 根据权利要求44所述的广播组播传输方式的切换装置,其特征在于,所述广播组播的DCI包含所述第二指示信息的方式包括:
    所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
    所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
  47. 根据权利要求46所述的广播组播传输方式的切换装置,其特征在于,所述目标原有字段包括下述的任意一项:
    DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
  48. 根据权利要求42所述的广播组播传输方式的切换装置,其特征在于,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
  49. 根据权利要求42所述的广播组播传输方式的切换装置,其特征在于,所述通过多播控制信道MCCH将所述目标传输方式发送给终端,包括:
    通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
  50. 根据权利要求42所述的广播组播传输方式的切换装置,其特征在于,所述通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端,包括:
    通过MAC-CE发送第四指示信息,其中所述第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
  51. 根据权利要求42所述的广播组播传输方式的切换装置,其特征在于,所述发送模块包括第一发送子模块和第二发送子模块;
    所述第一发送子模块用于在将广播组播业务的目标传输方式发送给终端之前,通过高层信令将所述PTP方式的配置信息以及所述PTM方式的配置信息发送给终端;或者,
    所述第二发送子模块用于在将广播组播业务的目标传输方式发送给终端之后,将所述目标传输方式的配置信息发送给终端;
    其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
  52. 根据权利要求51所述的广播组播传输方式的切换装置,其特征在于,
    所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;
    所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
  53. 根据权利要求42所述的广播组播传输方式的切换装置,其特征在于,所述装置还包括配置模块;
    所述配置模块用于当所述目标传输方式为PTP方式且终端处于空闲态时,配置所述终端用于建立PTP的随机接入信道RACH资源。
  54. 根据权利要求42至53任一项所述的广播组播传输方式的切换装置,其特征在于,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。
  55. 一种终端,包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序,其特征在于,所述处理器执行所述计算机程序时实现如下步骤:
    获取广播组播业务的目标传输方式,并获取所述目标传输方式的配置信息;
    基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
    所述目标传输方式为点对点PTP方式或点对多点PTM方式;
    所述目标传输方式的获取方式包括下述任意一项:获取基站在下行控制信息DCI中所指示的所述目标传输方式、获取基站在多播控制信道MCCH中所指示的所述目标传输方式、获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式、通过预设定时器获取所述目标传输方式。
  56. 根据权利要求55所述的终端,其特征在于,所述获取基站在下行控制信息DCI中所指示的所述目标传输方式,包括:
    接收基站通过专用DCI信令发送的第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
    接收基站通过广播组播的DCI发送的第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
  57. 根据权利要求56所述的终端,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
  58. 根据权利要求56所述的终端,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
  59. 根据权利要求56所述的终端,其特征在于,所述广播组播的DCI包含所述第二指示信息的方式包括:
    所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
    所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
  60. 根据权利要求59所述的终端,其特征在于,所述目标原有字段包括下述的任意一项:
    DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
  61. 根据权利要求55所述的终端,其特征在于,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
  62. 根据权利要求55所述的终端,其特征在于,所述获取基站在多播控制信道MCCH中所指示的所述目标传输方式,包括:
    接收基站通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
  63. 根据权利要求55所述的终端,其特征在于,所述获取基站通过媒体访问控制-控制单元MAC-CE所指示的所述目标传输方式,包括:
    接收基站通过MAC-CE发送的第四指示信息,其中所述第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
  64. 根据权利要求59所述的终端,其特征在于,所述通过预设定时器获取所述目标传输方式,包括:
    当终端在所述预设定时器的定时时长内未接收到广播组播的DCI时,将所述广播组播业务的目标传输方式确定为除当前传输方式之外的另一种传输方式。
  65. 根据权利要求55所述的终端,其特征在于,所述获取所述目标传输方式的配置信息,包括:
    在获取广播组播业务的目标传输方式之前,接收基站通过高层信令发送的所述PTP方式的配置信息以及所述PTM方式的配置信息;或者,
    在获取广播组播业务的目标传输方式之后,接收基站所发送的目标传输方式的配置信息;
    其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
  66. 根据权利要求65所述的终端,其特征在于,所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;
    所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
  67. 根据权利要求55所述的终端,其特征在于,所述步骤还包括:
    当所述目标传输方式为PTP方式且终端处于空闲态时,接收基站配置的用于建立PTP的随机接入信道RACH资源;或者,
    当所述目标传输方式为PTP方式且终端处于空闲态时,所述终端生成随机数,并当所述随机数大于预设接入因子时进行随机接入过程。
  68. 根据权利要求55至67任一项所述的终端,其特征在于,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。
  69. 一种基站,包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序,其特征在于,所述处理器执行所述计算机程序时实现如下步骤:
    将广播组播业务的目标传输方式发送给终端,并将所述目标传输方式的配置信息发送给所述终端,以使所述终端基于所述目标传输方式的配置信息接收所述广播组播业务;其中,
    所述目标传输方式为点对点PTP方式或点对多点PTM方式;
    将广播组播业务的目标传输方式发送给终端的方式包括下述任意一项:通过下行控制信息DCI将所述目标传输方式发送给终端、通过多播控制信道MCCH将所述目标传输方式发送给终端、通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端。
  70. 根据权利要求69所述的基站,其特征在于,所述通过下行控制信息DCI将所述目标传输方式发送给终端,包括:
    通过专用DCI信令发送第一指示信息,其中所述第一指示信息中包含有广播组播业务识别标识号和所述目标传输方式的标识信息;或者,
    通过广播组播的DCI发送第二指示信息,其中所述第二指示信息用于指示所述广播组播业务的传输方式由当前传输方式切换至所述目标传输方式。
  71. 根据权利要求70所述的基站,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务时,所述第一指示信息为位图指示信息,且所述位图指示信息中每个比特位对应一广播组播业务的目标传输方式。
  72. 根据权利要求70所述的基站,其特征在于,当所述广播组播业务为基于小区或同步信号块SSB覆盖区域进行配置的至少两个业务,且所述专用 DCI信令承载的比特数小于配置的总的广播组播业务数时,所述第一指示信息中包括至少两组位图指示信息,且每组位图指示信息用于指示相同传输方式的广播组播业务的目标传输方式。
  73. 根据权利要求70所述的基站,其特征在于,所述广播组播的DCI包含所述第二指示信息的方式包括:
    所述广播组播的DCI中新增有指示字段,且所述指示字段中包含有所述第二指示信息;或者,
    所述广播组播的DCI中的目标原有字段的含义重定义为所述第二指示信息。
  74. 根据权利要求73所述的基站,其特征在于,所述目标原有字段包括下述的任意一项:
    DCI指示格式、物理上行控制信道PUCCH功率控制参数、HARQ进程号、频域资源分配指示、时域资源分配指示。
  75. 根据权利要求69所述的基站,其特征在于,当所述目标传输方式为PTM方式时,用于指示所述目标传输方式的DCI中还包含有载波指示信息。
  76. 根据权利要求69所述的基站,其特征在于,所述通过多播控制信道MCCH将所述目标传输方式发送给终端,包括:
    通过MCCH周期性发送的第三指示信息,其中所述第三指示信息中包含有所述广播组播业务的目标传输方式、发送所述广播组播业务的载波或小区信息、在以至少一个SSB覆盖区域为单位进行广播组播业务的发送时SSB的索引号。
  77. 根据权利要求69所述的基站,其特征在于,所述通过媒体访问控制-控制单元MAC-CE将所述目标传输方式发送给终端,包括:
    通过MAC-CE发送第四指示信息,其中所述第四指示信息包括控制资源集合识别号和传输配置指示TCI状态识别号,其中所述TCI状态识别号与SSB索引号相关联。
  78. 根据权利要求69所述的基站,其特征在于,所述将所述目标传输方式的配置信息发送给所述终端,包括:
    在将广播组播业务的目标传输方式发送给终端之前,通过高层信令将所述PTP方式的配置信息以及所述PTM方式的配置信息发送给终端;或者,
    在将广播组播业务的目标传输方式发送给终端之后,将所述目标传输方式的配置信息发送给终端;
    其中,所述配置信息包括相对应传输方式的控制信道检测时机和/或物理下行共享信道PDSCH的速率匹配信息。
  79. 根据权利要求78所述的基站,其特征在于,所述控制信道检测时机基于单个广播组播业务进行配置或者基于一组广播组播业务进行配置;
    所述PTM方式所对应的PDSCH的速率匹配信息基于一组终端进行配置。
  80. 根据权利要求69所述的基站,其特征在于,所述步骤还包括:
    当所述目标传输方式为PTP方式且终端处于空闲态时,配置所述终端用于建立PTP的随机接入信道RACH资源。
  81. 根据权利要求69至80任一项所述的基站,其特征在于,所述广播组播业务的目标传输方式以单个SSB覆盖区域或一组SSB覆盖区域为单位进行配置。
  82. 一种非暂态计算机可读存储介质,其上存储有计算机程序,其特征在于,该计算机程序被处理器执行时实现如权利要求1至14任一项所述的广播组播传输方式的切换方法的步骤或执行如权利要求15至27任一项所述的广播组播传输方式的切换方法的步骤。
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