Enhanced transmission method and device for MBS message

Abstract

The invention discloses an enhanced transmission method of MBS messages. And the network side allows the MTCH channel to be borne in the BWP which does not contain the complete 0 # control resource set. The network side configures an initial downlink BWP (Broadband Width Protocol) containing a complete 0 # control resource set and a RedCap exclusive initial downlink BWP not containing the complete 0 # control resource set for the RedCap terminal; and the frequency domain range of an MCCH channel is configured to fall in the initial downlink BWP, and the frequency domain range of an MTCH channel is configured to fall in the RedCap exclusive initial downlink BWP. The RedCap terminal works in the RedCap exclusive initial downlink BWP in an idle state and an inactive state; and when the receiving opportunity of the MCCH is reached, the RedCap terminal is retuned into the frequency resource of the MCCH to monitor the MCCH, and the MBS indication and control information borne by the MCCH are received. According to the invention, the MBS broadcast service is expanded from the BWP containing the complete 0 # control resource set to the BWP not containing the complete 0 # control resource set, network resources are fully utilized, and the MBS receiving user experience of the RedCap terminal is improved at the same time.

Description

Technical Field

[0001] The present application relates to a mobile communication technology, and in particular to a method for a 5G NR (new radio) terminal (UE, user equipment) to receive MBS (multicast and broadcast services) messages. Background Art

[0002] With the evolution of 5G mobile communication technology, the 3GPP Release 17 standard introduced MBS, which provides an efficient group communication and scheduling mechanism that can distribute the same content to multiple users at the same time. At present, the 5G NR protocol stipulates that MBS messages can only be distributed to 5G terminals within the BWP (Band Width Part) containing the complete control resource set No. 0 (CORESET#0 or CORESET 0). Figure 1 As shown, the initial downlink BWP includes the complete control resource set No. 0. The MBS CFR (common frequency resource) is within the frequency range of the control resource set No. 0.

[0003] Under the existing 5G NR technology, before executing the access process, the network configures the initial downlink BWP for the 5G terminal through SIB1 (System Information Block Type 1). The initial downlink BWP contains the complete control resource set No. 0, such as Figure 2 As shown, it is used for downlink reception and cell access of 5G terminals. After the 5G terminal accesses the cell and enters the connected state (RRC_CONNECT), the network configures a dedicated downlink BWP for the 5G terminal through RRC (Radio Resource Control) signaling. The control resource set contained in the dedicated downlink BWP may not be CORESET#0, but other control resource sets, such as control resource set No. 1 (CORESET#1), such as Figure 3 Alternatively, the control resource set included in the dedicated downlink BWP is CORESET#0, as shown in Figure 4 shown.

[0004] In the connected state, if the active BWP currently working in the 5G terminal - the initial downlink BWP or the dedicated downlink BWP - contains a complete control resource set No. 0, such as Figure 4As shown in the figure, the MBS CFR resources are within the frequency range of the control resource set No. 0. At this time, the 5G terminal can normally receive the MBS broadcast service and maintain continuity in the idle state (RRC_IDLE), inactive state (RRC_INACTIVE), or connected state. In the connected state, if the active BWP currently working in the 5G terminal - the dedicated downlink BWP - does not contain the complete control resource set No. 0, such as Figure 5 As shown, there is no way to allocate MBS CFR resources in the connected state in the activated BWP, resulting in the UE being unable to normally receive the MBS broadcast service and the MSB broadcast service having to be interrupted.

[0005] Lightweight (RedCap, reduced capability) 5G terminals are referred to as RedCap terminals, and non-RedCap terminals are referred to as ordinary 5G terminals. In order to avoid all 5G terminals concentrating cell measurements on frequency domain resources near CD-SSB (Cell-Defining SSB) to cause resource congestion, lightweight 5G terminals support serving cell measurements on NCD-SSB (Non Cell-Defining SSB), avoiding the need for 5G terminals to repeatedly tune to CD-SSB for measurements, which affects the performance of 5G terminals. SSB stands for Synchronization Signal Block. Please refer to Figure 6 If the dedicated downlink BWP configured by the network for the RedCap terminal in the connected state does not contain the complete control resource set No. 0, but contains other control resource sets such as control resource set No. 1, then the dedicated downlink BWP must include an NCD SSB. Figure 7 If the dedicated downlink BWP configured by the network for the RedCap terminal in the connected state does not contain the complete control resource set No. 0, but contains other control resource sets such as control resource set No. 1, there is no way to allocate MBS CFR resources in the connected state in the dedicated downlink BWP, resulting in the UE being unable to normally receive MBS broadcast services in the connected state. Summary of the invention

[0006] The technical problem to be solved by this application is: when the RedCap terminal works in a RedCap exclusive initial downlink BWP that does not contain a complete control resource set No. 0, or the RedCap terminal works in a dedicated downlink BWP that does not contain a complete control resource set No. 0 in a connected state, how to carry and support MBS services in these BWPs that do not contain a complete control resource set No. 0, so that the RedCap terminal supports receiving MBS messages.

[0007] In order to solve the above technical problems, the present application proposes an embodiment 1 of an enhanced transmission method for MBS messages, which includes the following steps. Step S11: The network side of the 5G mobile communication system limits the MCCH channel to be carried in the BWP containing the complete control resource set No. 0, and allows the MTCH channel to be carried in the BWP that does not contain the complete control resource set No. 0. Step S12: The network side of the 5G mobile communication system configures the RedCap terminal with an initial downlink BWP containing the complete control resource set No. 0 and a RedCap exclusive initial downlink BWP that does not contain the complete control resource set No. 0; the network side of the 5G mobile communication system also configures the frequency domain range of the MCCH channel to fall within the initial downlink BWP, and also configures the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP. Step S13: The RedCap terminal works in the Redcap exclusive initial downlink BWP in an idle state and an inactive state; when the reception opportunity of the MCCH channel arrives, the RedCap terminal re-tunes to the frequency resource of the MCCH channel to listen to the MCCH channel and receive the MBS indication and control information carried by the MCCH channel. Step S14: In the idle state and the inactive state, the RedCap terminal obtains the configuration information of the MTCH channel according to the MBS indication and control information, and receives the MBS service data carried by the MTCH channel on the frequency resources of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel. Step S15: When the RedCap terminal changes from the idle state or the inactive state to the connected state, the network side of the 5G mobile communication system configures multiple dedicated downlink BWPs to the RedCap terminal, at least one of which contains the complete control resource set No. 0 and is called the first activated BWP, and at least one dedicated downlink BWP does not contain the complete control resource set No. 0 and is called the second activated BWP, and the first activated BWP contains the frequency domain range of the MCCH channel, and the second activated BWP contains the frequency domain range of the MTCH channel. Step S16: The network side of the 5G mobile communication system configures the RedCap terminal to work on two different activated BWPs in different time periods in the connected state; when the RedCap terminal works on the first activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; when the RedCap terminal works on the second activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0008] Furthermore, in the step S13 to step S14, when the paging opportunity arrives, the RedCap terminal re-tunes to the paging frequency resource to monitor and receive to implement the paging function.

[0009] The present application also proposes a second embodiment of an enhanced transmission method for MBS messages, which includes the following steps. Step S21: The network side of the 5G mobile communication system allows the MCCH channel to be carried in a BWP that does not contain a complete control resource set No. 0, and allows the MTCH channel to be carried in a BWP that does not contain a complete control resource set No. 0. Step S22: The network side of the 5G mobile communication system configures a RedCap-exclusive initial downlink BWP that does not contain a complete control resource set No. 0 for the RedCap terminal. The network side of the 5G mobile communication system also configures the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel to fall within the RedCap-exclusive initial downlink BWP. Step S23: The RedCap terminal operates in the Redcap-exclusive initial downlink BWP in an idle state and an inactive state; when the reception timing of the MCCH channel arrives, the RedCap terminal monitors the MCCH channel in the MCCH channel frequency resources and receives the MBS indication and control information carried by the MCCH channel. Step S24: In the idle state and the inactive state, the RedCap terminal obtains the configuration information of the MTCH channel according to the MBS indication and control information, and receives the MBS service data carried by the MTCH channel on the frequency resources of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel. Step S25: When the RedCap terminal changes from the idle state or the inactive state to the connected state, the network side of the 5G mobile communication system configures one or more dedicated downlink BWPs to the RedCap terminal, and at least one dedicated downlink BWP does not contain the complete control resource set No. 0, which is called the third activated BWP, and the third activated BWP also contains the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel. Step S26: The RedCap terminal works in the third activated BWP in the connected state, monitors the MCCH channel, receives the MBS control information carried by the MCCH channel, and receives the MBS service data carried by the MTCH channel. Alternatively, the step S25 is changed to step S25a, and the step S26 is changed to step S26a. Step S25a: When the RedCap terminal changes from an idle state or an inactive state to a connected state, the network side of the 5G mobile communication system configures multiple dedicated downlink BWPs to the RedCap terminal, and at least two dedicated downlink BWPs do not contain the complete control resource set No. 0, which are called the fourth activated BWP and the fifth activated BWP respectively, and the fourth activated BWP includes the frequency domain range of the MCCH channel, and the fifth activated BWP includes the frequency domain range of the MTCH channel.Step S26a: The network side of the 5G mobile communication system configures the RedCap terminal to work in two different activated BWPs in different time periods in the connected state; when the RedCap terminal works in the fourth activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; when the RedCap terminal works in the fifth activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0010] Furthermore, in the step S23 to step S24, when the paging opportunity arrives, the RedCap terminal re-tunes to the paging frequency resource to monitor and receive to implement the paging function.

[0011] The present application also proposes a third embodiment of an enhanced transmission method for MBS messages, which sequentially includes steps S11 to S14 in embodiment 1 and steps S25 to S26 in embodiment 2. Alternatively, steps S25 to S26 in embodiment 2 are changed to steps S25a to S26a.

[0012] The present application also proposes a fourth embodiment of an enhanced transmission method for MBS messages, which sequentially includes steps S21 to S24 in the second embodiment and steps S15 to S16 in the first embodiment.

[0013] The present application also proposes an embodiment 1 of an enhanced transmission device for MBS messages, including a first channel carrying limiting unit, a first BWP and channel configuration unit, a first non-connected state receiving unit, a second non-connected state receiving unit, a second BWP and channel configuration unit, and a first connected state receiving unit. The first channel carrying limiting unit is used to limit the MCCH channel to be carried in a BWP containing a complete control resource set No. 0, while allowing the MTCH channel to be carried in a BWP that does not contain a complete control resource set No. 0. The BWP and channel first configuration unit is used to configure an initial downlink BWP containing a complete control resource set No. 0 and a RedCap exclusive initial downlink BWP that does not contain a complete control resource set No. 0 for a RedCap terminal, and also configures the frequency domain range of the MCCH channel to fall within the initial downlink BWP, and also configures the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP. The non-connected state first receiving unit is used to allow the RedCap terminal to work in the RedCap exclusive initial downlink BWP in the idle state and the inactive state; when the reception opportunity of the MCCH channel arrives, the RedCap terminal re-tunes to the frequency resource of the MCCH channel to monitor the MCCH channel and receive the MBS indication and control information carried by the MCCH channel. The non-connected state second receiving unit is used to allow the RedCap terminal to obtain the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and receive the MBS service data carried by the MTCH channel on the frequency resource of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel. The BWP and channel second configuration unit is used to configure multiple dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from the idle state or the inactive state to the connected state, wherein at least one dedicated downlink BWP contains the complete control resource set No. 0, which is called the first activated BWP, and at least one dedicated downlink BWP does not contain the complete control resource set No. 0, which is called the second activated BWP, and the first activated BWP contains the frequency domain range of the MCCH channel, and the second activated BWP contains the frequency domain range of the MTCH channel. The first receiving unit in the connected state is used to configure the RedCap terminal to work on two different activated BWPs in different time periods in the connected state; when the RedCap terminal works in the first activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; when the RedCap terminal works in the second activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0014] The present application also proposes a second embodiment of an enhanced transmission device for MBS messages, including a second channel carrying limiting unit, a third BWP and channel configuration unit, a third non-connected state receiving unit, a fourth non-connected state receiving unit, a fourth BWP and channel configuration unit, and a second connected state receiving unit. The second channel carrying limiting unit is used to allow the MCCH channel to be carried in a BWP that does not contain a complete control resource set No. 0, and at the same time allow the MTCH channel to be carried in a BWP that does not contain a complete control resource set No. 0. The third BWP and channel configuration unit is used to configure a RedCap exclusive initial downlink BWP that does not contain a complete control resource set No. 0 for the RedCap terminal, and also configures the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP. The third non-connected state receiving unit is used to allow the RedCap terminal to work in the Redcap exclusive initial downlink BWP in an idle state and an inactive state; when the reception opportunity of the MCCH channel arrives, the RedCap terminal monitors the MCCH channel in the MCCH channel frequency resource and receives the MBS indication and control information carried by the MCCH channel. The fourth receiving unit in the non-connected state is used to allow the RedCap terminal to obtain the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and receive the MBS service data carried by the MTCH channel on the frequency resource of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel. The fourth BWP and channel configuration unit is used to configure one or more dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from the idle state or the inactive state to the connected state, at least one dedicated downlink BWP does not contain the complete control resource set No. 0 and is called the third activated BWP, and the third activated BWP also contains the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel. The second receiving unit in the connected state is used to allow the RedCap terminal to work in the third activated BWP in the connected state, monitor the MCCH channel, receive the MBS control information carried by the MCCH channel, and receive the MBS service data carried by the MTCH channel. Alternatively, the fourth BWP and channel configuration unit is changed to the fifth BWP and channel configuration unit, and the second receiving unit in the connected state is changed to the third receiving unit in the connected state. The BWP and channel fifth configuration unit is used to configure multiple dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from an idle state or an inactive state to a connected state. At least two dedicated downlink BWPs do not contain a complete control resource set No. 0, which are respectively called the fourth activated BWP and the fifth activated BWP. The fourth activated BWP includes the frequency domain range of the MCCH channel, and the fifth activated BWP includes the frequency domain range of the MTCH channel.The third receiving unit in the connected state is used to configure the RedCap terminal to work in two different activated BWPs in different time periods in the connected state; when the RedCap terminal works in the fourth activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; when the RedCap terminal works in the fifth activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0015] The present application also proposes a third embodiment of an enhanced transmission device for MBS messages, which is composed of the channel bearing first limiting unit, the BWP and channel first configuration unit, the non-connected state first receiving unit, the non-connected state second receiving unit in the first embodiment and the BWP and channel fourth configuration unit and the connected state second receiving unit in the second embodiment. Alternatively, the BWP and channel fourth configuration unit in the second embodiment is changed to the BWP and channel fifth configuration unit, and the connected state second receiving unit is changed to the connected state third receiving unit.

[0016] The present application also proposes a fourth embodiment of an enhanced transmission device for MBS messages, which is composed of the channel carrying second limiting unit, the BWP and channel third configuration unit, the non-connected state third receiving unit, the non-connected state fourth receiving unit in the second embodiment and the BWP and channel second configuration unit, the connected state first receiving unit in the first embodiment.

[0017] The technical effect achieved by the present application is: extending the MBS broadcast service from a BWP "containing a complete control resource set No. 0" to a BWP "not containing a complete control resource set No. 0", making full use of network resources while improving the MBS receiving user experience of RedCap terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the initial downlink BWP of a 5G terminal including a complete control resource set No. 0 and MBS CFR.

[0019] Figure 2 This is a schematic diagram showing that the initial downlink BWP of a 5G terminal includes a complete control resource set No. 0.

[0020] Figure 3 It is a schematic diagram showing that the dedicated downlink BWP of a 5G terminal does not include a complete control resource set No. 0.

[0021] Figure 4 It is a schematic diagram showing that the dedicated downlink BWP of a 5G terminal includes a complete control resource set No. 0.

[0022] Figure 5 It is a schematic diagram showing that the dedicated downlink BWP of a 5G terminal does not include a complete control resource set No. 0.

[0023] Figure 6 It is a schematic diagram showing that the dedicated downlink BWP of a 5G terminal must include the NCD SSB when it does not include the complete control resource set No. 0.

[0024] Figure 7 It is a schematic diagram showing that MBS CFR resources cannot be allocated when the dedicated downlink BWP of the 5G terminal does not include a complete control resource set No. 0.

[0025] Figure 8 It is a flowchart of Embodiment 1 of the enhanced transmission method of MBS messages proposed in the present application.

[0026] Fig. 9 It is a flowchart of Embodiment 2 of the enhanced transmission method of MBS messages proposed in the present application.

[0027] Fig.10 It is a flowchart of Embodiment 3 of the enhanced transmission method of MBS messages proposed in the present application.

[0028] Fig.11 It is a flowchart of Embodiment 4 of the enhanced transmission method of MBS messages proposed in the present application.

[0029] Fig.12 It is a structural diagram of Embodiment 1 of the enhanced transmission device for MBS messages proposed in the present application.

[0030] Fig.13 It is a structural diagram of Embodiment 2 of the enhanced transmission device for MBS messages proposed in the present application.

[0031] Fig.14 It is a structural diagram of Embodiment 3 of the enhanced transmission device for MBS messages proposed in the present application.

[0032] Fig.15 It is a structural diagram of Embodiment 4 of the enhanced transmission device for MBS messages proposed in the present application.

[0033] Explanation of the reference numerals in the figure: channel carrying first limiting unit 11, BWP and channel first configuration unit 12, non-connected state first receiving unit 13, non-connected state second receiving unit 14, BWP and channel second configuration unit 15, connected state first receiving unit 16, channel carrying second limiting unit 21, BWP and channel third configuration unit 22, non-connected state third receiving unit 23, non-connected state fourth receiving unit 24, BWP and channel fourth configuration unit 25, connected state second receiving unit 26, BWP and channel fifth configuration unit 25a, connected state third receiving unit 26a. DETAILED DESCRIPTION

[0034] MBS services are mainly carried by two key channels, MCCH (MultiCast Control Channel) and MTCH (Multicast Traffic Channel). The existing communication protocol limits these two channels to work only within the BWP containing the complete control resource set No. 0. This application uses different enhancement technologies for these two channels to provide flexible options for RedCap terminals in various application scenarios, so as to expand network capacity and resource utilization, while improving the MBS service user experience of RedCap terminals.

[0035] See also Figure 8 , Embodiment 1 of the enhanced transmission method of MBS message proposed in the present application includes the following steps.

[0036] Step S11: The network side of the 5G mobile communication system limits the MCCH channel to be carried in a BWP that includes a complete control resource set No. 0, and allows the MTCH channel to be carried in a BWP that does not include a complete control resource set No. 0, that is, the network side allows the MTCH channel and the MCCH channel to be carried in the same or different BWPs.

[0037] Step S12: The network side of the 5G mobile communication system configures the RedCap terminal with an initial downlink BWP including a complete control resource set No. 0 and a RedCap-exclusive initial downlink BWP that does not include a complete control resource set No. 0 through SIB1. The network side of the 5G mobile communication system also configures the frequency domain range of the MCCH channel to fall within the initial downlink BWP through SIB1 and SIB20, and also configures the frequency domain range of the MTCH channel to fall within the RedCap-exclusive initial downlink BWP.

[0038] Preferably, the frequency domain range (bandwidth) of the RedCap exclusive initial downlink BWP is narrower than the frequency domain range of the initial downlink BWP. A part of the frequency resources of the initial downlink BWP is used to transmit MBS indication and control information on the MCCH channel, and a part of the frequency resources of the RedCap exclusive initial downlink BWP is used to transmit MBS service data on the MTCH channel, so that the RedCap terminal has more time to work in the RedCap exclusive initial downlink BWP with a smaller bandwidth, which is beneficial to power saving of the RedCap terminal, and also beneficial to network load diversion and matching scheduling.

[0039] Step S13: The RedCap terminal works in the Redcap exclusive initial downlink BWP in idle state and inactive state. If the network side enables (activates) the MBS service, the serving cell transmits the MBS indication and control information to the RedCap terminal on the frequency resources of the MCCH channel in the initial downlink BWP. When the reception timing of the MCCH channel arrives, the RedCap terminal retunes (Retuning) to the frequency resources of the MCCH channel to listen to the MCCH channel and receive the MBS indication and control information carried by the MCCH channel. The MBS indication and control information includes: whether the MBS service is activated and the configuration information of the MTCH channel. After the monitoring and reception in the frequency resources of the MCCH channel are completed, the RedCap terminal returns to the Redcap exclusive initial downlink BWP.

[0040] In this step, the Redcap terminal is retuned to the frequency resources of the MCCH channel instead of switching to the initial downlink BWP. This requires special attention because the bandwidth of the initial downlink BWP may exceed the bandwidth capability supported by the RedCap terminal, while the frequency resources of the MCCH channel (i.e., the bandwidth of the MBS CFR resources) must be within the capabilities of the RedCap terminal. For example, in the FR1 (Frequency Range 1) band, the initial downlink BWP can be configured with a maximum bandwidth of 100MHz, while the Redcap terminal supports a bandwidth of 20MHz. The retuning refers to the RedCap terminal operating in the frequency range of the MCCH channel within the initial downlink BWP, i.e., the frequency range of the MBS CFR. This frequency range is limited to the capabilities of the RedCap terminal (20MHz bandwidth), which is consistent with the existing communication protocol. The RedCap terminal does not need to operate in the entire initial downlink BWP, so it does not switch to the initial downlink BWP.

[0041] Step S14: In the idle state and the inactive state, the RedCap terminal obtains the configuration information of the MTCH channel according to the MBS indication and control information, and receives the MBS service data carried by the MTCH channel on the frequency resources of the MTCH channel within the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel obtained from SIB1 and SIB20.

[0042] Due to the lightweight design of the bandwidth capability of the RedCap terminal and the congestion of frequency domain resources near the complete control resource set No. 0, the RedCap terminal works in the RedCap exclusive initial downlink BWP in the idle state and the inactive state, and can receive MBS services after the MBS service is enabled. Only when the reception opportunity of the MCCH channel arrives, the RedCap terminal re-tunes to the frequency resource where the MCCH channel is located to monitor and receive. This improves the MBS service experience of the RedCap terminal in the idle state and the inactive state.

[0043] In addition, in the idle state and inactive state, the frequency resources for paging can only be configured in the control resource set No. 0. Since the Redcap exclusive initial BWP does not contain the complete control resource set No. 0, it cannot be configured for paging in the idle state and inactive state. In order to implement the paging function, the RedCap terminal re-tunes to the paging frequency resources to monitor and receive when the paging opportunity arrives to implement the paging function.

[0044] The step S13 enables the RedCap terminal to receive the MBS indication and control information carried by the MCCH channel, and the step S14 enables the RedCap terminal to receive the MBS service data carried by the MTCH channel. Therefore, the steps S13 and S14 are switched according to the reception requirements of the MBS service, and there is no strict order restriction.

[0045] Step S15: When the RedCap terminal changes from an idle state or an inactive state to a connected state, in order to maintain the continuity and feasibility of the MBS service, the network side of the 5G mobile communication system configures multiple dedicated downlink BWPs to the RedCap terminal through RRC signaling, wherein at least one dedicated downlink BWP includes a complete control resource set No. 0, which is called the first activated BWP, and at least one dedicated downlink BWP does not include a complete control resource set No. 0, which is called the second activated BWP, and the first activated BWP includes the frequency domain range of the MCCH channel, and the second activated BWP includes the frequency domain range of the MTCH channel.

[0046] Step S16: The network side of the 5G mobile communication system comprehensively considers the coexistence capability of MBS services and other services based on service requirements, network capacity and resource utilization, and configures the RedCap terminal to work on two different activated BWPs in different time periods in the connected state through RRC signaling. When the RedCap terminal works on the first activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel. When the RedCap terminal works on the second activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0047] Due to the lightweight design of the bandwidth capability of RedCap terminals and the congestion of frequency domain resources near the complete control resource set No. 0, the network side will be more inclined to configure RedCap terminals to work more time in the second activated BWP. For MBS services that last for a long time, this improves the MBS service experience of RedCap terminals in the connected state.

[0048] The above-mentioned embodiment 1 follows the existing 3GPP Release 17 standard for the BWP of MCCH channel transmission, and only enhances the BWP of MTCH channel transmission (i.e., a breakthrough in the existing mobile communication protocol) - allowing the MTCH channel to work in a BWP that does not contain a complete control resource set No. 0. For typical application scenarios of MBS services, such as IPTV, live broadcast, etc., the network side will transmit MBS service data on the MTCH channel for a long time. This enhanced technology brings users a better MBS service experience and is conducive to RedCap terminals to better enjoy MBS technology. At the same time, it is compatible with the technology of monitoring the MCCH channel of ordinary 5G terminals working in the initial downlink BWP.

[0049] See also Fig. 9 , Embodiment 2 of the enhanced transmission method of MBS messages proposed in the present application includes the following steps.

[0050] Step S21: The network side of the 5G mobile communication system allows the MCCH channel to be carried in a BWP that does not contain a complete control resource set No. 0, and allows the MTCH channel to be carried in a BWP that does not contain a complete control resource set No. 0, and the network side allows the MTCH channel and the MCCH channel to be carried in the same or different BWPs.

[0051] Step S22: The network side of the 5G mobile communication system configures a RedCap-exclusive initial downlink BWP that does not include a complete control resource set No. 0 for the RedCap terminal through SIB1. The network side of the 5G mobile communication system also configures the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel through SIB1 and SIB20, both of which fall within the RedCap-exclusive initial downlink BWP.

[0052] Step S23: The RedCap terminal works in the RedCap exclusive initial downlink BWP in the idle state and the inactive state. If the network side enables (activates) the MBS service, the serving cell transmits MBS indication and control information to the RedCap terminal on the frequency resource of the MCCH channel in the Redcap exclusive initial downlink BWP. When the reception timing of the MCCH channel arrives, the RedCap terminal monitors the MCCH channel in the MCCH channel frequency resource and receives the MBS indication and control information carried by the MCCH channel.

[0053] In addition, in the idle state and inactive state, the frequency resources for paging can only be configured in the control resource set No. 0. Since the Redcap exclusive initial BWP does not contain the complete control resource set No. 0, it cannot be configured for paging in the idle state and inactive state. In order to implement the paging function, the RedCap terminal re-tunes to the paging frequency resources to monitor and receive when the paging opportunity arrives to implement the paging function.

[0054] Step S24: In the idle state and the inactive state, the RedCap terminal obtains the configuration information of the MTCH channel according to the MBS indication and control information, and receives the MBS service data carried by the MTCH channel on the frequency resources of the MTCH channel within the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel obtained from SIB1 and SIB20.

[0055] Since the frequency domain ranges of the MCCH channel and the MTCH channel are both included in the RedCap exclusive initial downlink BWP, the RedCap terminal can monitor and receive the MCCH channel and the MTCH channel without switching back and forth between different BWPs. The step S23 enables the RedCap terminal to receive the MBS indication and control information carried by the MCCH channel, and the step S24 enables the RedCap terminal to receive the MBS service data carried by the MTCH channel. Therefore, step S23 and step S24 are switched according to the reception requirements of the MBS service, and there is no strict order restriction.

[0056] Step S25: When the RedCap terminal changes from an idle state or an inactive state to a connected state, in order to maintain the continuity and feasibility of the MBS service, the network side of the 5G mobile communication system configures one or more dedicated downlink BWPs to the RedCap terminal through RRC signaling. At least one dedicated downlink BWP does not contain the complete control resource set No. 0, which is called the third activated BWP, and the third activated BWP also includes the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel.

[0057] Step S26: the RedCap terminal works in the third activated BWP in the connected state, monitors the MCCH channel, receives the MBS control information carried by the MCCH channel, and receives the MBS service data carried by the MTCH channel.

[0058] Alternatively, the step S25 is changed to step S25a, and the step S26 is changed to step S26a.

[0059] Step S25a: When the RedCap terminal changes from an idle state or an inactive state to a connected state, in order to maintain the continuity and feasibility of the MBS service, the network side of the 5G mobile communication system configures multiple dedicated downlink BWPs to the RedCap terminal through RRC signaling. At least two dedicated downlink BWPs do not contain the complete control resource set No. 0, which are called the fourth activated BWP and the fifth activated BWP respectively, and the fourth activated BWP includes the frequency domain range of the MCCH channel, and the fifth activated BWP includes the frequency domain range of the MTCH channel.

[0060] Step S26a: The network side of the 5G mobile communication system comprehensively considers the coexistence capability of MBS services and other services based on service requirements, network capacity and resource utilization, and configures the RedCap terminal to work in two different activated BWPs in different time periods in the connected state through RRC signaling. When the RedCap terminal works in the fourth activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel. When the RedCap terminal works in the fifth activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0061] Step S25 and step S26 are referred to as solution 1, and step S25a and step S26a are referred to as solution 2. To reduce the cost and implementation difficulty of switching between different BWPs for the RedCap terminal, solution 1 is the preferred solution.

[0062] The above-mentioned second embodiment enhances both the MCCH channel and the MTCH channel (i.e., a breakthrough in the existing mobile communication protocol) - allowing both the MCCH channel and the MTCH channel to work in a BWP that does not contain a complete control resource set No. 0. Ideally, the RedCap terminal can monitor the MCCH channel and receive the MTCH channel in the same BWP without switching back and forth, thereby reducing the cost and difficulty of switching between different BWPs for the RedCap terminal.

[0063] The enhanced transmission method of MBS messages proposed in the present application can be applied to various RRC states, including idle state, inactive state and connected state. In embodiment 1, steps S11 to S14 correspond to idle state or inactive state, and steps S15 to S16 correspond to connected state. In embodiment 2, steps S21 to S24 correspond to idle state or inactive state, and steps S25 to S26 (or steps S25a to S26a) correspond to connected state. The steps of different states in the above two embodiments can be combined to form a new embodiment. For example, steps S11 to S14 are superimposed on steps S25 to S26 to constitute embodiment 3. Steps S11 to S14 are superimposed on steps S25a to S26a to constitute a variation of embodiment 3. For another example, steps S21 to S24 are superimposed on steps S15 to S16 to constitute embodiment 4.

[0064] See also Fig.10 The third embodiment of the enhanced transmission method of MBS message proposed in the present application is that steps S11 to S14 are superimposed with steps S25 to S26. Alternatively, the steps S25 to S26 are changed to steps S25a to S26a.

[0065] See also Fig.11 The fourth embodiment of the enhanced transmission method of MBS messages proposed in the present application is that steps S21 to S24 are superimposed on steps S15 to S16.

[0066] See also Fig.12 The first embodiment of the enhanced transmission device of MBS message proposed in the present application includes a channel carrying first limiting unit 11, a BWP and channel first configuration unit 12, a non-connected state first receiving unit 13, a non-connected state second receiving unit 14, a BWP and channel second configuration unit 15, and a connected state first receiving unit 16. Fig.12 The device shown corresponds to Figure 8 The method shown.

[0067] The channel bearing first limiting unit 11 is used to limit the MCCH channel to be carried in a BWP containing a complete control resource set No. 0, and allow the MTCH channel to be carried in a BWP that does not contain a complete control resource set No. 0.

[0068] The BWP and channel first configuration unit 12 is used to configure an initial downlink BWP including a complete control resource set No. 0 and a RedCap-exclusive initial downlink BWP that does not include a complete control resource set No. 0 for the RedCap terminal, and also configures the frequency domain range of the MCCH channel to fall within the initial downlink BWP, and also configures the frequency domain range of the MTCH channel to fall within the RedCap-exclusive initial downlink BWP.

[0069] The non-connected state first receiving unit 13 is used to allow the RedCap terminal to work in the Redcap exclusive initial downlink BWP in idle state and inactive state. When the MCCH channel reception opportunity arrives, the RedCap terminal re-tunes to the frequency resource of the MCCH channel to monitor the MCCH channel and receive the MBS indication and control information carried by the MCCH channel.

[0070] The non-connected state second receiving unit 14 is used to enable the RedCap terminal to obtain the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and to receive the MBS service data carried by the MTCH channel on the frequency resources of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel.

[0071] The BWP and channel second configuration unit 15 is used to configure multiple dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from an idle state or an inactive state to a connected state, wherein at least one dedicated downlink BWP includes a complete control resource set No. 0, which is called the first activated BWP, and at least one dedicated downlink BWP does not include a complete control resource set No. 0, which is called the second activated BWP, and the first activated BWP includes the frequency domain range of the MCCH channel, and the second activated BWP includes the frequency domain range of the MTCH channel.

[0072] The first receiving unit 16 in the connected state is used to configure the RedCap terminal to work on two different activated BWPs in different time periods in the connected state. When the RedCap terminal works in the first activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel. When the RedCap terminal works in the second activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0073] See also Fig.13 The second embodiment of the enhanced transmission device of MBS message proposed in the present application includes a channel carrying second limiting unit 21, a BWP and channel third configuration unit 22, a non-connected state third receiving unit 23, a non-connected state fourth receiving unit 24, a BWP and channel fourth configuration unit 25, and a connected state second receiving unit 26. Fig.13 The device shown corresponds to Fig. 9 The method shown.

[0074] The second channel bearing limiting unit 21 is used to allow the MCCH channel to be carried in a BWP that does not include a complete control resource set No. 0, and to allow the MTCH channel to be carried in a BWP that does not include a complete control resource set No. 0.

[0075] The BWP and channel third configuration unit 22 is used to configure a RedCap exclusive initial downlink BWP that does not include a complete control resource set No. 0 for the RedCap terminal, and also configures the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP.

[0076] The non-connected third receiving unit 23 is used to allow the RedCap terminal to work in the RedCap exclusive initial downlink BWP in idle and inactive states. When the MCCH channel reception opportunity arrives, the RedCap terminal monitors the MCCH channel in the MCCH channel frequency resource and receives the MBS indication and control information carried by the MCCH channel.

[0077] The non-connected state fourth receiving unit 24 is used to enable the RedCap terminal to obtain the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and to receive the MBS service data carried by the MTCH channel on the frequency resources of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel.

[0078] The BWP and channel fourth configuration unit 25 is used to configure one or more dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from an idle state or an inactive state to a connected state. At least one dedicated downlink BWP does not include a complete control resource set No. 0, which is called the third activated BWP, and the third activated BWP also includes the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel.

[0079] The connected state second receiving unit 26 is used to enable the RedCap terminal to work in the third activated BWP in the connected state, monitor the MCCH channel, receive the MBS control information carried by the MCCH channel, and receive the MBS service data carried by the MTCH channel.

[0080] Alternatively, the BWP and channel fourth configuration unit 25 is changed to a BWP and channel fifth configuration unit 25a, and the connection state second receiving unit 26 is changed to a connection state third receiving unit 26a.

[0081] The BWP and channel fifth configuration unit 25a is used to configure multiple dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from an idle state or an inactive state to a connected state. At least two dedicated downlink BWPs do not include a complete control resource set No. 0, which are respectively called the fourth activated BWP and the fifth activated BWP. The fourth activated BWP includes the frequency domain range of the MCCH channel, and the fifth activated BWP includes the frequency domain range of the MTCH channel.

[0082] The third receiving unit 26a in the connected state is used to configure the RedCap terminal to work in two different activated BWPs in different time periods in the connected state. When the RedCap terminal works in the fourth activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel. When the RedCap terminal works in the fifth activated BWP in the connected state, it receives the MBS service data carried by the MTCH channel.

[0083] See also Fig.14 The third embodiment of the enhanced transmission device of MBS message proposed in the present application is that the channel carries the first limiting unit 11, the BWP and the channel first configuration unit 12, the non-connected state first receiving unit 13, the non-connected state second receiving unit 14 superimposes the BWP and the channel fourth configuration unit 25, and the connected state second receiving unit 26. Alternatively, the BWP and the channel fourth configuration unit 25 is changed to the BWP and the channel fifth configuration unit 25a, and the connected state second receiving unit 26 is changed to the connected state third receiving unit 26a.

[0084] See also Fig.15 The fourth embodiment of the enhanced transmission device of MBS message proposed in the present application is a channel-carrying second limiting unit 21, a BWP and channel third configuration unit 22, a non-connected third receiving unit 23, a non-connected fourth receiving unit 24 superimposed with a BWP and channel second configuration unit 15, and a connected first receiving unit 16.

[0085] The present application is an expansion of the existing reception scheme for MBS services, and provides the possibility of receiving MBS services for RedCap terminals working on BWPs that do not contain the complete control resource set No. 0. The existing reception scheme for MBS services is limited to, for example, the MBS service being carried by a BWP that contains the complete control resource set No. 0. The various embodiments of the present application add two enhanced transmission schemes for MBS services. The newly added embodiment 1 is that a BWP that contains the complete control resource set No. 0 and a BWP that does not contain the complete control resource set No. 0 jointly carry the MBS service. The newly added embodiment 2 is that a BWP that does not contain the complete control resource set No. 0 carries the MBS service. The present application is conducive to the joint development of MBS broadcast technology and RedCap technology, effectively expands network capacity and resource utilization, and also improves the user experience of RedCap terminals.

[0086] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should all be included in the protection scope of the present application.

Claims

1. An enhanced transmission method for MBS messages, characterized in that: The method comprises the following steps: Step S11: The network side of the 5G mobile communication system limits the MCCH channel to be carried in the BWP containing the complete control resource set No. 0, and allows the MTCH channel to be carried in the BWP that does not contain the complete control resource set No. 0; Step S12: The network side of the 5G mobile communication system configures an initial downlink BWP including a complete control resource set No. 0 and a RedCap exclusive initial downlink BWP that does not include a complete control resource set No. 0 for the RedCap terminal; the network side of the 5G mobile communication system also configures the frequency domain range of the MCCH channel to fall within the initial downlink BWP, and also configures the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP; Step S13: the RedCap terminal works in the RedCap exclusive initial downlink BWP in an idle state and an inactive state; when the reception opportunity of the MCCH channel arrives, the RedCap terminal re-tunes to the frequency resource of the MCCH channel to monitor the MCCH channel and receive the MBS indication and control information carried by the MCCH channel; Step S14: the RedCap terminal obtains the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and receives the MBS service data carried by the MTCH channel on the frequency resource of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel; Step S15: When the RedCap terminal changes from an idle state or an inactive state to a connected state, the network side of the 5G mobile communication system configures a plurality of dedicated downlink BWPs to the RedCap terminal, wherein at least one dedicated downlink BWP includes a complete control resource set No. 0, which is called a first activated BWP, and at least one dedicated downlink BWP does not include a complete control resource set No. 0, which is called a second activated BWP, and the first activated BWP includes a frequency domain range of the MCCH channel, and the second activated BWP includes a frequency domain range of the MTCH channel; Step S16: The network side of the 5G mobile communication system configures the RedCap terminal to work on two different activated BWPs in different time periods in the connected state; when the RedCap terminal works on the first activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; When the RedCap terminal works in the second activated BWP in the connected state, it receives MBS service data carried by the MTCH channel.

2. The enhanced transmission method of MBS message according to claim 1, characterized in that: In the steps S13 to S14, when the paging opportunity arrives, the RedCap terminal re-tunes to the paging frequency resource to monitor and receive to implement the paging function.

3. An enhanced transmission method for MBS messages, characterized in that: The method comprises the following steps: Step S21: The network side of the 5G mobile communication system allows the MCCH channel to be carried in a BWP that does not include a complete control resource set No. 0, and allows the MTCH channel to be carried in a BWP that does not include a complete control resource set No. 0; Step S22: The network side of the 5G mobile communication system configures a RedCap exclusive initial downlink BWP that does not include a complete control resource set No. 0 for the RedCap terminal, and the network side of the 5G mobile communication system also configures the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP; Step S23: the RedCap terminal works in the RedCap exclusive initial downlink BWP in an idle state and an inactive state; when the receiving opportunity of the MCCH channel arrives, the RedCap terminal monitors the MCCH channel in the MCCH channel frequency resource and receives the MBS indication and control information carried by the MCCH channel; Step S24: the RedCap terminal obtains the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and receives the MBS service data carried by the MTCH channel on the frequency resource of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel; Step S25: When the RedCap terminal changes from an idle state or an inactive state to a connected state, the network side of the 5G mobile communication system configures one or more dedicated downlink BWPs to the RedCap terminal, at least one dedicated downlink BWP does not include a complete control resource set No. 0, which is called a third activated BWP, and the third activated BWP includes both the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel; Step S26: the RedCap terminal works in the third activated BWP in the connected state, monitors the MCCH channel, receives the MBS control information carried by the MCCH channel, and receives the MBS service data carried by the MTCH channel; Alternatively, the step S25 is changed to step S25a, and the step S26 is changed to step S26a; Step S25a: When the RedCap terminal changes from an idle state or an inactive state to a connected state, the network side of the 5G mobile communication system configures a plurality of dedicated downlink BWPs to the RedCap terminal, at least two of which do not include a complete control resource set No. 0 and are respectively referred to as the fourth activated BWP and the fifth activated BWP, and the fourth activated BWP includes the frequency domain range of the MCCH channel, and the fifth activated BWP includes the frequency domain range of the MTCH channel; Step S26a: The network side of the 5G mobile communication system configures the RedCap terminal to work in two different activated BWPs in different time periods in the connected state; when the RedCap terminal works in the fourth activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; When the RedCap terminal works in the fifth activated BWP in the connected state, it receives MBS service data carried by the MTCH channel.

4. The enhanced transmission method of MBS message according to claim 3, characterized in that: In the step S23 to step S24, when the paging opportunity arrives, the RedCap terminal re-tunes to the paging frequency resource to monitor and receive to implement the paging function.

5. An enhanced transmission method for MBS messages, characterized in that: The method comprises steps S11 to S14 in claim 1 and steps S25 to S26 in claim 3 in sequence; Alternatively, the steps S25 to S26 in claim 3 are changed to steps S25a to S26a.

6. An enhanced transmission method for MBS messages, characterized in that: The method includes steps S21 to S24 in claim 3 and steps S15 to S16 in claim 1 in sequence.

7. An enhanced transmission device for MBS messages, characterized in that: It includes a channel bearing first limiting unit, a BWP and channel first configuration unit, a non-connected state first receiving unit, a non-connected state second receiving unit, a BWP and channel second configuration unit, and a connected state first receiving unit; The channel bearing first limiting unit is used to limit the MCCH channel to be carried in a BWP containing a complete control resource set No. 0, and allow the MTCH channel to be carried in a BWP that does not contain a complete control resource set No. 0; The BWP and channel first configuration unit is used to configure an initial downlink BWP including a complete control resource set No. 0 and a RedCap exclusive initial downlink BWP that does not include a complete control resource set No. 0 for the RedCap terminal, and further configure the frequency domain range of the MCCH channel to fall within the initial downlink BWP, and further configure the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP; The non-connected state first receiving unit is used to allow the RedCap terminal to work in the Redcap exclusive initial downlink BWP in an idle state and an inactive state; when the receiving opportunity of the MCCH channel arrives, the RedCap terminal re-tunes to the frequency resource of the MCCH channel to monitor the MCCH channel and receive the MBS indication and control information carried by the MCCH channel; The non-connected state second receiving unit is used to allow the RedCap terminal to obtain the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and receive the MBS service data carried by the MTCH channel on the frequency resource of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel; The BWP and channel second configuration unit is used to configure multiple dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from an idle state or an inactive state to a connected state, wherein at least one dedicated downlink BWP includes a complete control resource set No. 0, which is called a first activated BWP, and at least one dedicated downlink BWP does not include a complete control resource set No. 0, which is called a second activated BWP, and the first activated BWP includes a frequency domain range of the MCCH channel, and the second activated BWP includes a frequency domain range of the MTCH channel; The first receiving unit in the connected state is used to configure the RedCap terminal to work on two different activated BWPs in different time periods in the connected state; when the RedCap terminal works on the first activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; When the RedCap terminal works in the second activated BWP in the connected state, it receives MBS service data carried by the MTCH channel.

8. An enhanced transmission device for MBS messages, characterized in that: It includes a channel bearing second limiting unit, a BWP and channel third configuration unit, a non-connected state third receiving unit, a non-connected state fourth receiving unit, a BWP and channel fourth configuration unit, and a connected state second receiving unit; The channel bearing second limiting unit is used to allow the MCCH channel to be carried in a BWP that does not include a complete control resource set No. 0, and at the same time allow the MTCH channel to be carried in a BWP that does not include a complete control resource set No. 0; The BWP and channel third configuration unit is used to configure a RedCap exclusive initial downlink BWP that does not include a complete control resource set No. 0 for the RedCap terminal, and also configures the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel to fall within the RedCap exclusive initial downlink BWP; The non-connected third receiving unit is used to allow the RedCap terminal to work in the Redcap exclusive initial downlink BWP in an idle state and an inactive state; when the receiving opportunity of the MCCH channel arrives, the RedCap terminal monitors the MCCH channel in the MCCH channel frequency resource and receives the MBS indication and control information carried by the MCCH channel; The fourth receiving unit in the non-connected state is used to allow the RedCap terminal to obtain the configuration information of the MTCH channel according to the MBS indication and control information in the idle state and the inactive state, and receive the MBS service data carried by the MTCH channel on the frequency resource of the MTCH channel in the RedCap exclusive initial downlink BWP in combination with the frequency domain information of the MTCH channel; The fourth BWP and channel configuration unit is used to configure one or more dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from an idle state or an inactive state to a connected state, at least one dedicated downlink BWP does not include a complete control resource set No. 0, which is called a third activated BWP, and the third activated BWP includes both the frequency domain range of the MCCH channel and the frequency domain range of the MTCH channel; The second receiving unit in the connected state is used to enable the RedCap terminal to work in the third activated BWP in the connected state, monitor the MCCH channel, receive the MBS control information carried by the MCCH channel, and receive the MBS service data carried by the MTCH channel; Alternatively, the fourth BWP and channel configuration unit is changed to the fifth BWP and channel configuration unit, and the second connection state receiving unit is changed to the third connection state receiving unit; The fifth BWP and channel configuration unit is used to configure multiple dedicated downlink BWPs to the RedCap terminal when the RedCap terminal changes from an idle state or an inactive state to a connected state, at least two dedicated downlink BWPs do not contain a complete control resource set No. 0, which are respectively called the fourth activated BWP and the fifth activated BWP, and the fourth activated BWP includes the frequency domain range of the MCCH channel, and the fifth activated BWP includes the frequency domain range of the MTCH channel; The third receiving unit in the connected state is used to configure the RedCap terminal to work in two different activated BWPs in different time periods in the connected state; when the RedCap terminal works in the fourth activated BWP in the connected state, it monitors the MCCH channel and receives the MBS control information carried by the MCCH channel; When the RedCap terminal works in the fifth activated BWP in the connected state, it receives MBS service data carried by the MTCH channel.

9. An enhanced transmission device for MBS messages, characterized in that: The method comprises the channel carrying first limiting unit, the BWP and channel first configuration unit, the non-connected state first receiving unit, the non-connected state second receiving unit in claim 7 and the BWP and channel fourth configuration unit, the connected state second receiving unit in claim 8; Alternatively, the BWP and channel fourth configuration unit in claim 8 is changed to a BWP and channel fifth configuration unit, and the connected state second receiving unit is changed to a connected state third receiving unit.

10. An enhanced transmission device for MBS messages, characterized in that: It is composed of the channel carrying second limiting unit, BWP and channel third configuration unit, non-connected state third receiving unit, non-connected state fourth receiving unit in claim 8 and the BWP and channel second configuration unit, connected state first receiving unit in claim 7.

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