CN116762370A

CN116762370A - Transmission method of broadcast multicast service

Info

Publication number: CN116762370A
Application number: CN202080107987.0A
Authority: CN
Inventors: 张鑫
Original assignee: JRD Communication Shenzhen Ltd
Current assignee: JRD Communication Shenzhen Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2023-09-15
Also published as: WO2022141087A1

Abstract

The application provides a transmission method, which comprises the following steps: according to the system state, determining the transmission mode of MBS, wherein the transmission mode comprises PTP and/or PTM, and using the determined transmission mode to transmit MBS, wherein the MBS data is mapped from a logic channel to a transmission channel in the MAC layer, the logic channel is MBS service channel and MBS control channel, the transmission channel is downlink shared channel, thereby determining the mapping relation between the logic channel and the transmission channel according to the actual condition of MBS service, and effectively saving UE resources and power consumption.

Description

Transmission method of broadcast multicast service

[ field of technology ]

The disclosed embodiments of the present application relate to the field of communication technologies, and more particularly, to a communication method and a transmission method and a base station of a broadcast multicast service (MBS) in an NR communication network for a user equipment.

[ background Art ]

The transmission modes of the multimedia broadcast Multicast service (Multimedia Broadcast Multicast Service, MBMS) of LTE can be classified into SC-PTM (Single Cell Point-To-Multipoint) and MBSFN (Multicast/Multicast single frequency network). SC-PTM refers to a point-to-multipoint service in which data is transmitted simultaneously from a data source to a plurality of subscribers within a specific range, so that resources of a network (including a core network and an access network) are shared, and services (e.g., multimedia services, etc.) are simultaneously provided for a large number of subscribers having the same requirements with less resources. The MBSFN transmission scheme refers to synchronous transmission in a plurality of cells at the same time and with the same frequency. The frequency resource can be saved by using the MBSFN transmission mode, and the frequency spectrum utilization rate is improved. Meanwhile, the diversity effect brought by the multi-cell same-frequency transmission can solve the problems of blind area coverage and the like, enhance the reliability of receiving and improve the coverage rate.

The mapping relationship between the logical channels and the transmission channels of the SC-PTM and MBSFN transmission modes is shown in fig. 1. In the transmission scheme of SC-PTM, logical channels are SC-MTCH and (Single Cell MBMS traffic Channel ) and SC-MBS control channel (Single Cell MBMS Control Channel, single cell MBMS control channel), and are mapped to DL-SCH (Downlink Share Channel, downlink shared channel) in the MAC layer. In the MBSFN transmission scheme, the logical channels are MTCH and MBS control channels, and are mapped to MCH (Multicast Channel ) in common at the MAC layer.

However, in the MBS (Multicast Broadcast Service ) in the current 5G new air interface network, there are two transmission modes, namely PTM (Point to Multipoint, point-to-multipoint transmission) and PTP (Point-to-Point transmission), instead of the MBSFN transmission mode of MBMS in the LTE network. Because of the different transmission modes, the transmission channels, logical channels, and mapping relationships between the two of the MBS in the NR network may also be different.

Therefore, a transmission protocol needs to be proposed to define the transmission channel, the logical channel and the mapping relationship between the two in the MBS service.

[ application ]

According to an embodiment of the present application, the present application proposes a transmission method of a broadcast multicast service (MBS) in an NR communication network to solve the above-mentioned problems.

According to an aspect of the present application, there is provided a transmission method of a broadcast multicast service (MBS) in an NR communication network, comprising: determining a transmission mode of the MBS according to a system state, wherein the transmission mode comprises point-to-point transmission PTP and/or point-to-multipoint transmission PTM; and carrying out data transmission of the MBS by using the determined transmission mode, wherein the service data of the MBS is mapped from a logic channel to a transmission channel in a MAC layer, the logic channel is an MBS service channel and an MBS control channel, and the transmission channel is a downlink shared channel.

According to another aspect of the present application, there is provided a base station comprising a processor and a communication circuit, the processor being connected to the communication circuit; the processor is configured to perform the transmission method described above.

According to another aspect of the present application, there is provided a base station storing instructions which, when executed, implement the above-described transmission method.

The beneficial effects of the application are as follows: the application decides the transmission mode of MBS according to the system state, wherein the transmission mode includes PTP and/or PTM, uses the decided transmission mode to transmit the MBS data, wherein the MBS data is mapped from logic channel to transmission channel in MAC layer, the logic channel is MBS business channel and MBS control channel, the transmission channel is down shared channel, so that the mapping relation between the logic channel and the transmission channel can be selected according to the actual condition of MBS business, if the UE end needs to receive the MBS whole business, the data of all logic channels are mapped to one transmission channel, uses one RNTI (Radio Network Temporary Identity, radio network temporary mark) to mark, so that the UE end only needs to monitor one RNTI to receive the business. If the UE end only needs to receive one of the MBS services, the data of the logical channels are mapped to the respective transmission channels respectively, and the respective RNTI is used respectively, so that the UE end can receive the service only by monitoring the RNTI of the corresponding channel of one of the MBS services, the situation that the UE decodes the whole multiplexed transmission block can be avoided, and the power consumption of the UE is saved.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic diagram of mapping relationship between a logical channel and a transport channel of an MBMS service in an LTE network;

FIG. 2 is a flow chart of an embodiment of the transmission method of the present application;

fig. 3 is a schematic diagram of multiplexing a single MBS service using a PTM transmission logical channel at a MAC layer according to an embodiment of the transmission method of the present application;

fig. 4 is a schematic diagram of multiplexing a single MBS service in a MAC layer using PTP transmission logical channels according to an embodiment of the transmission method of the present application;

fig. 5 is a schematic diagram of multiplexing a single MBS service using PTM and PTP transmission logical channels at a MAC layer according to an embodiment of the transmission method of the present application;

fig. 6 is a schematic diagram of multiplexing of multiple MBS services using PTM transmission logical channels at a MAC layer according to an embodiment of the transmission method of the present application;

fig. 7 is a schematic diagram of multiplexing multiple MBS services using PTP transmission logical channels at a MAC layer according to an embodiment of the transmission method of the present application;

fig. 8 is a schematic diagram of multiplexing of multiple MBS services using PTM and PTP transmission logical channels at the MAC layer according to an embodiment of the transmission method of the present application;

fig. 9 is a schematic diagram of a single MBS service according to an embodiment of the transmission method of the present application using PTM transmission logical channels not multiplexed at the MAC layer;

fig. 10 is a schematic diagram of a single MBS service according to an embodiment of the transmission method of the present application using PTP transmission logical channels not multiplexed in the MAC layer;

fig. 11 is a schematic diagram of a single MBS service according to an embodiment of the transmission method of the present application using PTM and PTP transmission logical channels not multiplexed at the MAC layer;

fig. 12 is a schematic diagram of a plurality of MBS services according to an embodiment of the transmission method of the present application not multiplexed at the MAC layer using PTM transmission logical channels;

fig. 13 is a schematic diagram of a plurality of MBS services according to an embodiment of the transmission method of the present application not multiplexed at the MAC layer by using PTP transmission logical channels;

fig. 14 is a schematic diagram of a plurality of MBS services according to an embodiment of the transmission method of the present application using PTM and PTP transmission logical channels not multiplexed at the MAC layer;

fig. 15 is a schematic diagram of a radio base station according to an embodiment of the transmission method of the present application;

fig. 16 is a schematic storage diagram of a wireless base station according to an embodiment of the transmission method of the present application;

[ detailed description ] of the application

the following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 2, fig. 1 is a flow chart of an embodiment of a transmission method according to the present application.

S110, determining a transmission mode of the MBS according to the system state, wherein the transmission mode comprises PTP and/or PTM.

In MBS service, the transmission mode may be PTP, PTM, optionally one of them or both PTP and PTM. The network side may determine the transmission mode of the MBS service according to the implementation situation of the MBS service, such as Qos parameters, channel quality, or the number of UEs (User equipment) receiving the service, so that the network side has a more flexible resource scheduling manner. The Qos parameters may include: 5QI (5G Quality identity), ARP, reflected Qos attributes (Reflective QoS Attribute, RQA), guaranteed stream bit rate (GFBR), maximum stream bit rate (MFBR), indication control and maximum packet loss rate.

For example, in a cell, only one UE needs to receive MBS temporarily, and in this case, if the PTM mode is used, transmission resources are wasted, so that the PTP transmission mode may be selected. However, when there are multiple UEs that need to receive MBS service at the same time, the PTM transmission mode may be selected. Of course, the network side also considers the Qos parameter of the MBS service and the transmission channel required by the service bearer at the same time, if the quality of the transmission channel of the current MBS service bearer is poor and the Qos requirement of the MBS service is high, the network side will select the PTP transmission mode to ensure the successful transmission of the MBS service.

And S120, carrying out MBS data transmission by using the determined transmission mode, wherein the MBS data is mapped to a transmission channel from a logic channel in a MAC layer, the logic channel is an MBS service channel and an MBS control channel, and the transmission channel is a downlink shared channel.

The wireless interface for MBS service transmission can be divided into three protocol layers: a physical layer (L1), a data link layer (L2), and a network layer (L3).

L1: the method is mainly used for providing a wireless physical channel for transmission of high-level services.

L2: comprising four sublayers

MAC (Medium Access Control) media access control

RLC (Radio Link Control) radio link control

PDCP (Packet Data Convergence Protocol) packet data Convergence protocol

SDAP (Service Data Adaptation Protocol) service data adaptation protocol

L3: only the RRC sublayer is in the access layer

MBS business data transmission is processed by an L3 layer, an L2 layer and a physical layer and is sent to a UE end through a wireless environment. Wherein the channels can be divided into logical channels, transport channels and physical channels according to links between different layers. The physical channel is a channel on which the physical layer actually transmits information, the transport channel is a channel between the physical layer and the MAC sublayer, and the logical channel is a channel between the MAC sublayer and the RLC sublayer.

In this embodiment, the logical channels define the logical channels of the MBS service as an MBS control channel and an MBS service channel according to whether control information or service information is transmitted, where the MBS control channel is used to transmit control plane information, and the MBS service channel is only used to transmit user plane information. And the downlink of the transport channel of the MBS is defined as a downlink shared channel. The physical layer channel is the channel for actually transmitting the MBS service data, and the physical channel mapped by the downlink shared channel is the PDSCH (Physical downlink shared channel ). At the MAC layer, MBS service data of a logical channel MBS control channel and an MBS service channel are mapped to a transmission channel downlink shared channel, and at the physical layer, the data of the transmission channel downlink shared channel is mapped to a PDSCH, so that the MBS service data is sent through the PDSCH and is transmitted to a UE end through a wireless environment.

In one embodiment, mapping the transmission of the MBS from the logical channel to the transport channel at the MAC layer further comprises: the MBS data of the plurality of MBS service channels and the plurality of MBS control channels are mapped to the same downlink shared channel together. The transmission modes adopted by the same MBS service can be specifically divided into the following cases according to the service quantity of the MBS:

when the MBS has only 1 service and at least 2 MBS Qos flows of the MBS service use the transmission mode of the PTM, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to the same downlink shared channel together.

In the MBS service of the NR network, qos flows are the finest Qos differentiation granularity in the MBS service, and the same MBS Qos flow has the same Qos requirement. One TMGI (Temporary Mobile Group Identity, temporary mobile group identifier) corresponds to one MBS service, and user plane data with the same TMGI in the MBS service may obtain the same forwarding process (such as the same scheduling, the same admission threshold, etc.), and the same MBS service may have multiple MBS QoS flows, but the same MBS QoS flow may not belong to multiple MBS services at the same time.

Referring to fig. 3, the MBS service 1 may be identified by, for example, TMGI (Temporary Mobile Group Identity ), and the MBS service 1 is divided into two MBS QoS flows, MBS QoS flow 1 and MBS QoS flow 2. Of course, in this example, the MBS service may be divided into more MBS QoS flows, without limitation. The two MBS QoS flows all adopt the transmission mode of PTM, and the two MBS QoS logic channels MBS control channel and MBS service channel are two mutually independent, namely MBS control channel 1, MBS service channel 1, MBS control channel 2 and MBS service channel 2. In the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2, MBS business channel 2 are mapped to the same down shared channel 1, and the same RNTI is used for identification transmission, thereby realizing multiplexing of different logic channels in the MAC layer, and enabling the UE end to receive the whole MBS business by monitoring only one RNTI. Of course, when two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the downlink shared channel together.

When the MBS has only 1 service and at least 2 MBS Qos flows of the MBS service all use the transmission mode of PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped together to the same downlink shared channel.

Referring to fig. 4, the MBS service 1 may be identified by, for example, a TMGI, and the MBS service 1 is divided into two MBS QoS flows, MBS QoS flow 1 and MBS QoS flow 2, respectively. Of course, in this example, the MBS service may be divided into more MBS QoS flows, without limitation. The two MBS QoS flows all adopt the PTP transmission mode, and the two MBS QoS logic channels MBS control channel and MBS service channel are two mutually independent, namely MBS control channel 1, MBS service channel 1, MBS control channel 2 and MBS service channel 2. In the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2, MBS business channel 2 are mapped to the same down shared channel 1, and the same RNTI is used for identification transmission, thereby realizing multiplexing of different logic channels in the MAC layer, and enabling the UE end to receive the whole MBS business by monitoring only one RNTI. Of course, when two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the downlink shared channel together.

When the MBS has only one service and at least 1 MBS Qos flow of the MBS service uses a transmission mode of PTM, and at least another 1 MBS Qos flow uses a transmission mode of PTP, MBS data of at least 2 MBS service channels and/or 2 MBS control channels are mapped to the same downlink shared channel together.

Referring to fig. 5, the MBS service 1 may be identified by, for example, a TMGI, and the MBS service 1 is divided into two MBS QoS flows, MBS QoS flow 1 and MBS QoS flow 2, respectively. Of course, in this example, the MBS service may be divided into more MBS QoS flows, without limitation. One MBS QoS flow 1 adopts a PTM transmission mode, the other MBS QoS flow 2 adopts a PTP transmission mode, and two MBS QoS logic channels MBS control channels and MBS service channels are mutually independent and respectively comprise an MBS control channel 1, an MBS service channel 1, an MBS control channel 2 and an MBS service channel 2. In the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2, MBS business channel 2 are mapped to the same down shared channel 1, and the same RNTI is used for identification transmission, thereby realizing multiplexing of different logic channels in the MAC layer, and enabling the UE end to receive the whole MBS business by monitoring only one RNTI. Of course, when two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the downlink shared channel together.

When the MBS has at least 2 services and at least 2 MBS Qos flows of at least 2 MBS services all use the transmission mode of the PTM, data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to the same downlink shared channel together.

Referring to fig. 6, in the illustration, there are two MBS services, MBS service 1 and MBS service 2, respectively, MBS service 1 and MBS service 2 may be identified by, for example, TMGI1 and TMGI2, respectively, and one MBS service 1 has MBS QoS flow 1 and the other MBS service 2 has MBS QoS flow 2. Of course, in this example, the number of MBS services may be greater, and each MBS service may be divided into more MBS QoS flows, which is not limited herein. The MBS QoS flow 1 and the MBS QoS flow 2 both adopt a PTM transmission mode, and the two MBS QoS logic channels MBS control channels and MBS service channels are mutually independent and respectively comprise an MBS control channel 1, an MBS service channel 1, an MBS control channel 2 and an MBS service channel 2. In the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2, MBS business channel 2 are mapped to the same down shared channel 1, and the same RNTI is used for identification transmission, thereby realizing multiplexing of different logic channels in the MAC layer, and enabling the UE end to receive the whole MBS business by monitoring only one RNTI. Of course, when two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the downlink shared channel together.

When the MBS has at least 2 services and at least 2 MBS Qos flows of the at least 2 MBS services all use the transmission mode of PTP, data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to the same downlink shared channel together.

Referring to fig. 7, in the illustration, there are two MBS services, MBS service 1 and MBS service 2, respectively, MBS service 1 and MBS service 2 may be identified by, for example, TMGI1 and TMGI2, respectively, and one MBS service 1 has MBS QoS flow 1 and the other MBS service 2 has MBS QoS flow 2. Of course, in this example, the number of MBS services may be greater, and each MBS service may be divided into more MBS QoS flows, which is not limited herein. Both MBS QoS flow 1 and MBS QoS flow 2 adopt PTP transmission mode, and the two MBS QoS logic channels MBS control channel and MBS business channel are two mutually independent, namely MBS control channel 1, MBS business channel 1, MBS control channel 2 and MBS business channel 2. In the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2, MBS business channel 2 are mapped to the same down shared channel 1, and the same RNTI is used for identification transmission, thereby realizing multiplexing of different logic channels in the MAC layer, and enabling the UE end to receive the whole MBS business by monitoring only one RNTI. Of course, when two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the downlink shared channel together.

When at least 2 MBS services exist and at least 1 MBS Qos flow of at least 1 MBS service uses a transmission mode of PTM, at least 1 MBS Qos flow of at least another 1 MBS service uses a transmission mode of PTP, data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to the same downlink shared channel together.

Referring to fig. 8, in the illustration, there are two MBS services, MBS service 1 and MBS service 2, respectively, MBS service 1 and MBS service 2 may be identified by, for example, TMGI1 and TMGI2, respectively, and one MBS service 1 has MBS QoS flow 1 and the other MBS service 2 has MBS QoS flow 2. Of course, in this example, the number of MBS services may be greater, and each MBS service may be divided into more MBS QoS flows, which is not limited herein. Wherein, the MBS QoS flow 1 adopts a PTM transmission mode, the MBS QoS flow 2 adopts a PTP transmission mode, and two MBS QoS logic channels MBS control channels and MBS service channels are mutually independent and respectively comprise MBS control channel 1, MBS service channel 1, MBS control channel 2 and MBS service channel 2. In the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2, MBS business channel 2 are mapped to the same down shared channel 1, and the same RNTI is used for identification transmission, thereby realizing multiplexing of different logic channels in the MAC layer, and enabling the UE end to receive the whole MBS business by monitoring only one RNTI. Of course, when two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the downlink shared channel together.

In this embodiment, the logical channels are multiplexed in the MAC layer, and the data are mapped to the downlink shared channel together, so that when the UE receives the MBS service, the UE only needs to monitor one RNTI, and can receive the entire MBS service, so that the UE can save resources and power consumption for monitoring multiple channels.

In another embodiment, mapping the transmission of the MBS from the logical channel to the transport channel at the MAC layer further comprises: the data of the plurality of MBS service channels and/or the plurality of MBS control channels are respectively mapped to different downlink shared channels. According to the number of sessions (service) of the MBS service, the transmission modes adopted by the same MBS service may be specifically divided into the following cases:

when the MBS has only one service and at least 2 MBS Qos flows of the MBS service all use the transmission mode of PTM, MBS data of at least 2 MBS service channels and at least 2 MBS control channels are mapped to different downlink shared channels respectively.

Referring to fig. 9, the MBS service 1 may be identified by, for example, a TMGI, and the MBS service 1 is divided into two MBS QoS flows, MBS QoS flow 1 and MBS QoS flow 2, respectively. Of course, in this example, the MBS service may be divided into more MBS QoS flows, without limitation. The two MBS QoS flows all adopt the transmission mode of PTM, and the two MBS QoS logic channels MBS control channel and MBS service channel are two mutually independent, namely MBS control channel 1, MBS service channel 1, MBS control channel 2 and MBS service channel 2. At the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2 and MBS business channel 2 are respectively mapped to the downlink shared channel 1 and the downlink shared channel 2, and different RNTI are respectively used for transmission and transmission, so that the UE can monitor the corresponding RNTI according to the MBS business required by the UE to receive the required MBS business, and the situation that the whole multiplexing transmission block needs to be decoded to receive the business is avoided. Of course, when the two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the respective corresponding downlink shared channels.

When the MBS has only one service and at least 2 MBS Qos flows of the MBS service all use the transmission mode of PTP, MBS data of at least 2 MBS service channels and at least 2 MBS control channels are mapped to different downlink shared channels respectively.

Referring to fig. 10, the MBS service 1 may be identified by, for example, a TMGI, and the MBS service 1 is divided into two MBS QoS flows, MBS QoS flow 1 and MBS QoS flow 2, respectively. Of course, in this example, the MBS service may be divided into more MBS QoS flows, without limitation. The two MBS QoS flows all adopt the PTP transmission mode, and the two MBS QoS logic channels MBS control channel and MBS service channel are two mutually independent, namely MBS control channel 1, MBS service channel 1, MBS control channel 2 and MBS service channel 2. At the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2 and MBS business channel 2 are respectively mapped to the downlink shared channel 1 and the downlink shared channel 2, and different RNTI are respectively used for transmission and transmission, so that the UE can monitor the corresponding RNTI according to the MBS business required by the UE to receive the required MBS business, and the situation that the whole multiplexing transmission block needs to be decoded to receive the business is avoided. Of course, when the two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the respective corresponding downlink shared channels.

When the MBS has only one service and at least one MBS Qos flow of the MBS service uses the transmission mode of PTM, and at least another MBS Qos flow uses the transmission mode of PTP, MBS data of at least 2 MBS service channels and at least 2 MBS control channels are mapped to different downlink shared channels respectively.

Referring to fig. 11, the MBS service 1 may be identified by, for example, a TMGI, and the MBS service 1 is divided into two MBS QoS flows, MBS QoS flow 1 and MBS QoS flow 2, respectively. Of course, in this example, the MBS service may be divided into more MBS QoS flows, without limitation. One MBS QoS flow 1 adopts a PTM transmission mode, the other MBS QoS flow 2 adopts a PTP transmission mode, and two MBS QoS logic channels MBS control channels and MBS service channels are mutually independent and respectively comprise an MBS control channel 1, an MBS service channel 1, an MBS control channel 2 and an MBS service channel 2. At the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2 and MBS business channel 2 are respectively mapped to the downlink shared channel 1 and the downlink shared channel 2, and different RNTI are respectively used for transmission and transmission, so that the UE can monitor the corresponding RNTI according to the MBS business required by the UE to receive the required MBS business, and the situation that the whole multiplexing transmission block needs to be decoded to receive the business is avoided. Of course, when the two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the respective corresponding downlink shared channels.

When the MBS has at least 2 services and at least 2 MBS Qos flows of the at least 2 MBS services all use the transmission mode of the PTM, MBS data of the at least 2 MBS service channels and the at least 2 MBS control channels are mapped to different downlink shared channels respectively.

Referring to fig. 12, in the illustration, there are two MBS services, MBS service 1 and MBS service 2, respectively, MBS service 1 and MBS service 2 may be identified by, for example, TMGI1 and TMGI2, respectively, and one MBS service 1 has MBS QoS flow 1 and the other MBS service 2 has MBS QoS flow 2. Of course, in this example, the number of MBS services may be greater, and each MBS service may be divided into more MBS QoS flows, which is not limited herein. The MBS QoS flow 1 and the MBS QoS flow 2 both adopt a PTM transmission mode, and the two MBS QoS logic channels MBS control channels and MBS service channels are mutually independent and respectively comprise an MBS control channel 1, an MBS service channel 1, an MBS control channel 2 and an MBS service channel 2. At the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2 and MBS business channel 2 are respectively mapped to the downlink shared channel 1 and the downlink shared channel 2, and different RNTI are respectively used for transmission and transmission, so that the UE can monitor the corresponding RNTI according to the MBS business required by the UE to receive the required MBS business, and the situation that the whole multiplexing transmission block needs to be decoded to receive the business is avoided. Of course, when the two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the respective corresponding downlink shared channels.

When the MBS service is at least 2 and at least 2 MBS Qos flows of the at least 2 MBS services all use the transmission mode of PTP, MBS data of the at least 2 MBS service channels and the at least 2 MBS control channels are mapped to different downlink shared channels respectively.

Referring to fig. 13, in the illustration, there are two MBS services, MBS service 1 and MBS service 2, respectively, MBS service 1 and MBS service 2 may be identified by, for example, TMGI1 and TMGI2, respectively, and one MBS service 1 has MBS QoS flow 1 and the other MBS service 2 has MBS QoS flow 2. Of course, in this example, the number of MBS services may be greater, and each MBS service may be divided into more MBS QoS flows, which is not limited herein. Both MBS QoS flow 1 and MBS QoS flow 2 adopt PTP transmission mode, and the two MBS QoS logic channels MBS control channel and MBS business channel are two mutually independent, namely MBS control channel 1, MBS business channel 1, MBS control channel 2 and MBS business channel 2. At the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2 and MBS business channel 2 are respectively mapped to the downlink shared channel 1 and the downlink shared channel 2, and different RNTI are respectively used for transmission and transmission, so that the UE can monitor the corresponding RNTI according to the MBS business required by the UE to receive the required MBS business, and the situation that the whole multiplexing transmission block needs to be decoded to receive the business is avoided. Of course, when the two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the respective corresponding downlink shared channels.

When at least 2 MBS services exist and at least 1 MBS Qos flow of at least 1 MBS service uses a transmission mode of PTM, at least 1 MBS Qos flow of at least another 1 MBS service uses a transmission mode of PTP, MBS data of at least 2 MBS service channels and at least 2 MBS control channels are respectively mapped to different downlink shared channels.

Referring to fig. 14, in the illustration, there are two MBS services, MBS service 1 and MBS service 2, respectively, MBS service 1 and MBS service 2 may be identified by, for example, TMGI1 and TMGI2, respectively, and one MBS service 1 has MBS QoS flow 1 and the other MBS service 2 has MBS QoS flow 2. Of course, in this example, the number of MBS services may be greater, and each MBS service may be divided into more MBS QoS flows, which is not limited herein. Wherein, the MBS QoS flow 1 adopts a PTM transmission mode, the MBS QoS flow 2 adopts a PTP transmission mode, and two MBS QoS logic channels MBS control channels and MBS service channels are mutually independent and respectively comprise MBS control channel 1, MBS service channel 1, MBS control channel 2 and MBS service channel 2. At the MAC layer, the data of MBS control channel 1, MBS business channel 1 and the data of MBS control channel 2 and MBS business channel 2 are respectively mapped to the downlink shared channel 1 and the downlink shared channel 2, and different RNTI are respectively used for transmission and transmission, so that the UE can monitor the corresponding RNTI according to the MBS business required by the UE to receive the required MBS business, and the situation that the whole multiplexing transmission block needs to be decoded to receive the business is avoided. Of course, when the two MBS QoS flows only have data transmission on the MBS control channel or the MBS traffic channel, the data of the MBS control channels or the data of the MBS traffic channels of the two MBS QoS flows may also be mapped to the respective corresponding downlink shared channels.

In this embodiment, the demultiplexing of the logical channels at the MAC layer well solves the problem of resource waste that may be caused by multiplexing of the logical channels at the MAC layer in some specific cases. For example, different service information is carried on the multiplexed logical channel, for example, MBS service channel 1 carries service 1, MBS service channel 2 carries service 2, and both service information are multiplexed onto the downlink shared channel at the same time, where the UE may only need one of the service information, but the UE needs to receive and decode the entire multiplexed transport block to obtain the required service information, which will cause waste of resources and power consumption of the UE. At this time, two kinds of service information are respectively mapped to different downlink shared channels, and different RNTI is used for transmission and transmission, so that the UE can monitor the corresponding RNTI according to the MBS service required by the UE, and can receive the MBS service required by the UE.

In an embodiment, the MBS service may further include a unicast transmission mode, and in general, the unicast transmission mode is used to provide a high-level MBS service to a specific user, or the UE may register/deregister with a service center of the MBS using the unicast transmission mode.

Referring to fig. 15, fig. 15 is a schematic structural diagram of a base station according to an embodiment of the present application. The base station 10 comprises a processor 12 and a communication circuit 11; the processor 12 is connected to the communication circuit 11, and the processor 12 is configured to execute instructions to implement the scheduling method of the downlink control information.

The processor 12 may also be referred to as a CPU (Central Processing Unit ). The processor 12 may be an integrated circuit chip having signal processing capabilities. Processor 12 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor 12 may be any conventional processor or the like.

Referring to fig. 16, fig. 16 is a schematic diagram of a base station according to another embodiment of the application. The base station 20 of the present embodiment stores instructions/program data 21, which instructions/program data 21, when executed, implement the methods provided by any of the embodiments of the transmission method of the present application and any non-conflicting combinations. The instructions/program data 21 may form a program file stored in the storage medium of the base station 20 as a software product, so that a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) performs all or part of the steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, an optical disk, or other various media capable of storing program codes, or a terminal device such as a computer, a server, a mobile phone, a tablet, or the like.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing is only the embodiments of the present application, and therefore, the patent scope of the application is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the application.

Claims

A transmission method of MBS in an NR communication network, comprising:

determining a transmission mode of the MBS according to a system state, wherein the transmission mode comprises point-to-point transmission PTP and/or point-to-multipoint transmission PTM;

and carrying out data transmission of the MBS by using the determined transmission mode, wherein the data of the MBS service is mapped from a logic channel to a transmission channel in a MAC layer, the logic channel is an MBS service channel and an MBS control channel, and the transmission channel is a downlink shared channel.
The transmission method according to claim 1, wherein the mapping of the MBS data from the logical channel to the transport channel at the MAC layer further comprises:

and the MBS data of the MBS service channels and/or the MBS control channels are mapped to the same downlink shared channel together.
The transmission method according to claim 2, wherein,

when the MBS has only 1 service and at least 2 MBS Qos flows of the MBS use the transmission mode of the PTM, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to the same 1 downlink shared channel together.
The transmission method according to claim 2, wherein,

when the MBS has only 1 service and at least 2 MBS Qos flows of the MBS use the transmission mode of the PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to the same 1 downlink shared channel together.
The transmission method according to claim 2, wherein,

when the MBS has only 1 service and at least 1 MBS Qos flow of the MBS uses the transmission mode of the PTM and at least another 1 MBS Qos flow uses the transmission mode of PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to the same 1 downlink shared channel together.
The transmission method according to claim 2, wherein,

when the MBS has at least 2 services and at least 2 MBS Qos flows of at least 2 MBS services use the transmission mode of the PTM, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped together to the same 1 downlink shared channel.
The transmission method according to claim 2, wherein,

when the MBS has at least 2 services and at least 2 MBS Qos flows of at least 2 MBS services all use the transmission mode of the PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped together to the same 1 downlink shared channel.
The transmission method according to claim 2, wherein,

when the MBS has at least 2 services and at least 1 MBS Qos flow of at least 1 MBS service uses the transmission mode of the PTM, at least 1 MBS Qos flow of at least another 1 MBS service uses the transmission mode of the PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped together to the same 1 downlink shared channel.
The transmission method according to claim 1, wherein the mapping of the MBS data from the logical channel to the transport channel at the MAC layer further comprises:

and MBS data of a plurality of MBS service channels and/or a plurality of MBS control channels are mapped to different downlink shared channels.
The transmission method according to claim 9, wherein,

when the MBS has only 1 service and at least 2 MBS Qos flows of the MBS service use the transmission mode of the PTM, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to different downlink shared channels respectively.
The transmission method according to claim 10, wherein,

when the MBS has only 1 service and at least 2 MBS Qos flows of the MBS service use the transmission mode of the PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to different downlink shared channels respectively.
The transmission method according to claim 9, wherein,

when the MBS has only 1 service, and at least 1 MBS Qos flow of the MBS service uses the transmission mode of the PTM, and at least another 1 MBS Qos flow uses the transmission mode of PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to different downlink shared channels respectively.
The transmission method according to claim 9, wherein,

when the MBS has at least 2 services and at least 2 MBS Qos flows of at least 2 MBS services all use the transmission mode of the PTM, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to different downlink shared channels respectively.
The transmission method according to claim 9, wherein,

when the MBS has at least 2 services and at least 2 MBS Qos flows of at least 2 MBS services all use the transmission mode of the PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to different downlink shared channels respectively.
The transmission method according to claim 9, wherein,

when the MBS has at least 2 services and at least 1 MBS Qos flow of at least 1 MBS service uses the transmission mode of the PTM, at least 1 MBS Qos flow of at least another 1 MBS service uses the transmission mode of the PTP, MBS data of at least 2 MBS service channels and/or at least 2 MBS control channels are mapped to different downlink shared channels respectively.
Transmission method according to claim 1, characterized in that the system state comprises a quality of service parameter and/or a channel quality parameter.
The transmission method of claim 1, wherein the transmission mode further comprises unicast transmission.
A base station comprising a processor and a communication circuit, said processor being coupled to said communication circuit;

the processor is configured to perform the transmission method of any of the preceding claims 1-17.
A base station storing instructions that when executed implement the transmission method of any of claims 1-17.