Method and system for receiving MBS in BWP containing NCD SSB

Abstract

The invention discloses a method for receiving an MBS in a BWP containing an NCD SSB. Step S11, the network side configures a RedCap exclusive initial downlink BWP for the RedCap terminal through the SIB1; the RedCap exclusive initial downlink BWP does not contain CD-SSB or does not contain a complete No.0 control resource set, but contains other control resource sets; and the other control resource set comprises one NCD-SSB (Network Control Description-Service Set Block). And step S12, the network side configures a second MBS public frequency resource at the RedCap exclusive initial downlink BWP, wherein the second MBS public frequency resource is used for bearing the MCCH and the MTCH of MBS service. And step S13, when the RedCap terminal is in the RRC idle state or the RRC inactive state, the RedCap terminal receives the MBS service on the second MBS common frequency resource. According to the method and the device, the 5G terminal, especially the 5G RedCap terminal, has more opportunities to receive the MBS in the RRC connection state, so that the receiving continuity of the MBS in different RRC states is ensured. And meanwhile, the network capacity and the frequency domain resource utilization rate of the mobile communication network are also expanded, and the user experience of the 5G terminal is improved.

Description

Technical Field

[0001] The present application relates to a method for a 5G terminal to receive MBS (multicast and broadcast services) services in a 5G mobile communication system. 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. The existing 5G NR (new radio) technology limits 5G terminals to receive MBS services only within the BWP (Band Width Part) containing CD-SSB (Cell Defining SSB) and Control Resource Set No. 0 (CORESET#0 or CORESET 0). SSB stands for Synchronization Signal Block.

[0003] Under the existing 5G NR technology, the network configures the initial downlink BWP (initial downlink BWP) for the 5G terminal through SIB1 (System Information Block Type 1) for downlink reception, cell access, etc. of the 5G terminal. The frequency domain range of the initial downlink BWP includes CD-SSB and the complete control resource set No. 0. After the 5G terminal accesses the cell and enters the RRC connection state (RRC_CONNECT), the network configures a dedicated downlink BWP for the 5G terminal through RRC (Radio Resource Control) signaling. The dedicated downlink BWP may or may not include the control resource set No. 0. If the active BWP (i.e., one of the initial downlink BWP or the dedicated downlink BWP) currently working on the 5G terminal contains CD-SSB and a complete set of control resources No. 0, the active BWP contains MBS common frequency resources (CFR, Common Frequency Resource). At this time, the 5G terminal can normally receive MBS services and maintain continuity in the RRC idle state (RRC_IDLE), RRC inactive state (RRC_INACTIVE), and RRC connected state. However, in the RRC connected state, if the current active BWP of the 5G terminal (at this time, it only refers to the dedicated downlink BWP) does not contain CD-SSB or does not contain a complete set of control resources No. 0, the active BWP does not contain MBS common frequency resources. At this time, the 5G terminal cannot normally receive MBS services, and the MBS service will be interrupted.

[0004] For 5G RedCap (reduced capability) terminals, in order to avoid all RedCap terminals concentrating cell measurements in the frequency domain resources near CD-SSB to cause resource congestion, RedCap terminals support serving cell measurements in NCD-SSB (Non Cell-Defining SSB). The network configures the RedCap exclusive initial downlink BWP (initial-downlinkBWP-RedCap) and the dedicated downlink BWP (dedicate downlink BWP) in the RRC connection state for the RedCap terminal through SIB1. These two downlink BWPs may or may not include CD-SSB. If the downlink BWP of the RedCap terminal includes NCD-SSB, the RedCap terminal performs cell measurement, beam detection, wireless link monitoring, etc. on NCD-SSB. If the downlink BWP of the RedCap terminal does not include CD-SSB or does not include the complete control resource set No. 0, the downlink BWP does not include MBS common frequency resources, and the RedCap terminal cannot receive MBS services normally.

[0005] Downlink BWP, CD-SSB, NCD-SSB, and control resource set all have dual characteristics of frequency domain and time domain. This application mainly innovates on the frequency domain characteristics and follows the processing method of the existing communication protocol for the time domain characteristics. For example, this application mentions that a certain downlink BWP includes CD-SSB and a complete control resource set No. 0. It should be understood that the frequency domain range of the downlink BWP includes the frequency domain range of CD-SSB and the complete frequency domain range of control resource set No. 0. Summary of the invention

[0006] The technical problem to be solved by the present application is how to enable the RedCap terminal to support the reception of MBS services when the RedCap terminal operates in a downlink BWP that does not include a CD-SSB or does not include a complete control resource set No. 0.

[0007] In order to solve the above technical problems, the present application proposes a method for receiving MBS in a BWP containing NCD SSB, which includes the following steps. Step S11: The network side configures a RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1; the RedCap exclusive initial downlink BWP does not include CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB. Step S12: The network side configures a second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service. Step S13: When the RedCap terminal is in the RRC idle state or the RRC inactive state, the RedCap terminal receives the MBS service on the second MBS common frequency resource.

[0008] The present application also proposes a second embodiment of a method for receiving MBS in a BWP containing NCD SSB, comprising the following steps. Step S21: The network side configures the same initial downlink BWP for non-RedCap terminals and RedCap terminals through SIB1; the initial downlink BWP contains CD-SSB and a complete control resource set No. 0. Step S22: The network side configures a third MBS common frequency resource in the initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service. Step S23: When the non-RedCap terminal or the RedCap terminal is in the RRC idle state or the RRC inactive state, the non-RedCap terminal or the RedCap terminal receives the MBS service through the third MBS common frequency resource. Step S24: When the RedCap terminal is in the RRC connected state, the network side configures a dedicated downlink BWP for the RedCap terminal; the dedicated downlink BWP does not contain CD-SSB or does not contain a complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB. Step S25: The network side configures the fourth MBS common frequency resource in the dedicated downlink BWP for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the step S25 is changed to: the RedCap terminal in the RRC connected state sends an MBS interest indication signaling to the network side, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. Step S26: When the RedCap terminal is in the RRC connected state, the RedCap terminal receives the MBS service through the fourth MBS common frequency resource.

[0009] The present application also proposes a third embodiment of a method for receiving MBS in a BWP containing NCD SSB, comprising the following steps. Step S31: The network side configures a RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1; the RedCap exclusive initial downlink BWP does not contain CD-SSB or does not contain a complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB. Step S32: The network side configures a second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service. Step S33: When the RedCap terminal is in the RRC idle state or the RRC inactive state, the RedCap terminal receives the MBS service on the second MBS common frequency resource. Step S34: When the RedCap terminal is in the RRC connected state, the network side configures a dedicated downlink BWP for the RedCap terminal; the dedicated downlink BWP does not contain CD-SSB or does not contain a complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB. Step S35: The network side configures the fourth MBS common frequency resource in the dedicated downlink BWP for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the step S35 is changed to: the RedCap terminal in the RRC connected state sends an MBS interest indication signaling to the network side, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. Step S36: When the RedCap terminal is in the RRC connected state, the RedCap terminal receives the MBS service through the fourth MBS common frequency resource.

[0010] The present application also proposes a fourth embodiment of a method for receiving MBS in a BWP containing NCD SSB, comprising the following steps. Step S41: The RedCap terminal is in an RRC connected state in cell A, and cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 contains CD-SSB and a complete control resource set No. 0; the RedCap terminal receives the MBS service of cell A through the dedicated downlink BWP 1. Step S42: When the RedCap terminal meets the switching conditions from cell A to cell B, cell B configures a dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not contain CD-SSB or does not contain a complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB. Step S43: After the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the step S43 is changed to: the RedCap terminal in the RRC connected state sends an MBS interest indication signaling to cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell A transmits the MBS interest indication signaling to cell B during the negotiation of switching resources with cell B; when the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. Alternatively, the step S43 is changed to: when the RedCap terminal switches to cell B, the RedCap terminal in the RRC connected state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. Step S44: After the RedCap terminal switches to the cell B, the RedCap terminal receives the MBS service of the cell B through the fifth MBS common frequency resource.

[0011] The present application also proposes a fifth embodiment of a method for receiving MBS in a BWP containing NCD SSB, comprising the following steps. Step S51: The RedCap terminal is in an RRC connected state in cell A, and cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 does not contain a CD-SSB or does not contain a complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB; cell A configures a sixth MBS common frequency resource in the dedicated downlink BWP 1 for carrying the MCCH and MTCH channels of the MBS service; the RedCap terminal receives the MBS service of cell A through the sixth MBS common frequency resource. Step S52: When the RedCap terminal meets the switching conditions from cell A to cell B, cell B configures a dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not contain a CD-SSB or does not contain a complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB. Step S53: After the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the step S53 is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell A, and reports the frequency point information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell A transmits the MBS interest indication signaling to cell B during the negotiation of switching resources with cell B; after the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal for carrying the MCCH and MTCH channels of the MBS service in the RRC connection state. Alternatively, the step S53 is changed to: after the RedCap terminal switches to cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state. Step S54: after the RedCap terminal switches to cell B, the RedCap terminal receives the MBS service of cell B through the fifth MBS common frequency resource.

[0012] The present application also proposes an embodiment 1 of a system for receiving MBS in a BWP containing NCD SSB, comprising a RedCap exclusive initial downlink BWP configuration unit, a second MBS public frequency resource configuration unit, and an idle and inactive MBS service receiving unit 1. The RedCap exclusive initial downlink BWP configuration unit is used by the network side to configure a RedCap exclusive initial downlink BWP for a RedCap terminal through SIB1; the RedCap exclusive initial downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB. The second MBS public frequency resource configuration unit is used by the network side to configure a second MBS public frequency resource in the RedCap exclusive initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service. The idle and inactive MBS service receiving unit is used for the RedCap terminal to receive MBS services on the second MBS public frequency resource when the RedCap terminal is in an RRC idle state or an RRC inactive state.

[0013] The present application also proposes a second embodiment of a system for receiving MBS in a BWP containing NCD SSB, including an initial downlink BWP configuration unit, a third MBS common frequency resource configuration unit, an idle and inactive MBS service receiving unit 2, a dedicated downlink BWP configuration unit, a fourth MBS common frequency resource configuration unit, and a connected MBS service receiving unit. The initial downlink BWP configuration unit is used by the network side to configure the same initial downlink BWP for non-RedCap terminals and RedCap terminals through SIB1; the initial downlink BWP contains CD-SSB and a complete control resource set No. 0. The third MBS common frequency resource configuration unit is used by the network side to configure a third MBS common frequency resource in the initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service. The idle and inactive MBS service receiving unit 2 is used for the non-RedCap terminal or the RedCap terminal to receive the MBS service through the third MBS common frequency resource when the non-RedCap terminal or the RedCap terminal is in the RRC idle state or the RRC inactive state. The dedicated downlink BWP configuration unit is used for the network side to configure a dedicated downlink BWP for the RedCap terminal when the RedCap terminal is in the RRC connected state; the dedicated downlink BWP does not include CD-SSB or does not include the complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB. The fourth MBS common frequency resource configuration unit is used for the network side to configure the fourth MBS common frequency resource in the dedicated downlink BWP for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the fourth MBS common frequency resource configuration unit is changed to the RedCap terminal in the RRC connected state to send an MBS interest indication signaling to the network side, and report the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. The connected state MBS service receiving unit is used for the RedCap terminal to receive MBS services through the fourth MBS common frequency resource when the RedCap terminal is in the RRC connected state.

[0014] The present application also proposes a third embodiment of a system for receiving MBS in a BWP containing NCD SSB, including a RedCap exclusive initial downlink BWP configuration unit, a second MBS public frequency resource configuration unit, an idle and inactive MBS service receiving unit, a dedicated downlink BWP configuration unit, a fourth MBS public frequency resource configuration unit, and a connected MBS service receiving unit. The RedCap exclusive initial downlink BWP configuration unit is used by the network side to configure the RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1; the RedCap exclusive initial downlink BWP does not contain CD-SSB or does not contain the complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB. The second MBS public frequency resource configuration unit is used by the network side to configure the second MBS public frequency resource in the RedCap exclusive initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service. The idle and inactive MBS service receiving unit is used for the RedCap terminal to receive MBS services on the second MBS public frequency resource when the RedCap terminal is in the RRC idle state or the RRC inactive state. The dedicated downlink BWP configuration unit is used for the network side to configure a dedicated downlink BWP for the RedCap terminal when the RedCap terminal is in the RRC connected state; the dedicated downlink BWP does not include CD-SSB or does not include the complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB. The fourth MBS common frequency resource configuration unit is used for the network side to configure the fourth MBS common frequency resource in the dedicated downlink BWP for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the fourth MBS common frequency resource configuration unit is changed to the RedCap terminal in the RRC connected state to send an MBS interest indication signaling to the network side, and report the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. The connected state MBS service receiving unit is used for the RedCap terminal to receive MBS services through the fourth MBS common frequency resource when the RedCap terminal is in the RRC connected state.

[0015] The present application also proposes a third embodiment of a system for receiving MBS in a BWP containing NCD SSB, including an original cell dedicated downlink BWP configuration unit, a new cell dedicated downlink BWP configuration unit, a fifth MBS common frequency resource configuration unit, and a switched MBS service receiving unit. The original cell dedicated downlink BWP configuration unit is used for when the RedCap terminal is in an RRC connected state in cell A, cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 includes CD-SSB and a complete control resource set No. 0; the RedCap terminal receives the MBS service of cell A through the dedicated downlink BWP 1. The new cell dedicated downlink BWP configuration unit is used for when the RedCap terminal meets the switching conditions from cell A to cell B, cell B configures a dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not include CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB. The fifth MBS common frequency resource configuration unit is used for, when the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2, for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the fifth MBS common frequency resource configuration unit is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell A, and reports the frequency point information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell A transmits the MBS interest indication signaling to cell B during the negotiation of switching resources with cell B; when the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, for carrying the MCCH and MTCH channels of the MBS service in the RRC connection state. Alternatively, the fifth MBS common frequency resource configuration unit is changed to: when the RedCap terminal switches to cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state. The post-switching MBS service receiving unit is used for the RedCap terminal to receive the MBS service of cell B through the fifth MBS common frequency resource after the RedCap terminal switches to cell B.

[0016] The present application also proposes a fifth embodiment of a system for receiving MBS in a BWP containing NCD SSB, comprising a sixth MBS common frequency resource configuration unit, a new cell dedicated downlink BWP configuration unit, a fifth MBS common frequency resource configuration unit, and a switched MBS service receiving unit. The sixth MBS common frequency resource configuration unit is used for when a RedCap terminal is in an RRC connected state in cell A, cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 does not contain a CD-SSB or does not contain a complete control resource set No. 0, but contains other control resource sets; the other control resource sets contain an NCD-SSB; cell A configures a sixth MBS common frequency resource in the dedicated downlink BWP 1 for carrying MCCH and MTCH channels of MBS services; the RedCap terminal receives the MBS service of cell A through the sixth MBS common frequency resource. The new cell dedicated downlink BWP configuration unit is used for when the RedCap terminal meets the switching conditions from cell A to cell B, cell B configures dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not include CD-SSB or does not include the complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB. The fifth MBS common frequency resource configuration unit is used for when the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service. Alternatively, the fifth MBS common frequency resource configuration unit is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell A transmits the MBS interest indication signaling to cell B during the negotiation of switching resources with cell B; when the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state. Alternatively, the fifth MBS common frequency resource configuration unit is changed to: when the RedCap terminal switches to cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state.The post-switching MBS service receiving unit is used for, after the RedCap terminal switches to the cell B, the RedCap terminal receiving the MBS service of the cell B through the fifth MBS common frequency resource.

[0017] The technical effect achieved by this application is that MBS services are no longer limited to being carried in a downlink BWP containing CD-SSB, but can also be carried in a downlink BWP containing NCD-SSB. This allows 5G terminals, especially 5G RedCap terminals, to have more opportunities to receive MBS services in the RRC connected state, thereby ensuring the continuity of MBS service reception in different RRC states. At the same time, this application also expands the network capacity and frequency domain resource utilization of the mobile communication network, and improves the user experience of 5G terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flowchart of Embodiment 1 of the method for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0019] Figure 2 It is a flowchart of Embodiment 2 of the method for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0020] Figure 3 It is a flowchart of Embodiment 3 of the method for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0021] Figure 4 It is a flowchart of Embodiment 4 of the method for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0022] Figure 5 It is a flowchart of Embodiment 5 of the method for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0023] Figure 6 It is a structural diagram of Embodiment 1 of the system for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0024] Figure 7 It is a structural diagram of Embodiment 2 of the system for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0025] Figure 8 It is a structural diagram of Embodiment 3 of the system for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0026] Fig. 9 It is a structural diagram of Embodiment 4 of the system for receiving MBS in a BWP containing NCD SSB proposed in the present application.

[0027] Fig.10 It is a structural diagram of Embodiment 5 of the system for receiving MBS in a BWP including NCD SSB proposed in the present application.

[0028] Explanation of the reference numerals in the figure: RedCap exclusive initial downlink BWP configuration unit 11, second MBS public frequency resource configuration unit 12, idle and inactive MBS service receiving unit 13, initial downlink BWP configuration unit 21, third MBS public frequency resource configuration unit 22, idle and inactive MBS service receiving unit 23, dedicated downlink BWP configuration unit 24, fourth MBS public frequency resource configuration unit 25, connected MBS service receiving unit 26, original cell dedicated downlink BWP configuration unit 41, new cell dedicated downlink BWP configuration unit 42, fifth MBS public frequency resource configuration unit 43, switched MBS service receiving unit 44, sixth MBS public frequency resource configuration unit 51. DETAILED DESCRIPTION

[0029] See also Figure 1 The first embodiment of the method for receiving MBS in a BWP containing NCD SSB proposed in the present application includes the following steps. The first embodiment is that a 5G RedCap terminal (hereinafter referred to as RedCap terminal) receives MBS service in a RedCap exclusive initial downlink BWP containing NCD SSB.

[0030] Step S11: The network side configures the RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1. The RedCap exclusive initial downlink BWP does not include CD-SSB or does not include the complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB. The RedCap terminal detects the NCD-SSB to achieve downlink synchronization, measurement, beam detection, wireless link monitoring, etc.

[0031] In this step, the network side also configures the initial downlink BWP for the 5G terminal through SIB1. The initial downlink BWP includes CD-SSB and a complete control resource set No. 0. Since RedCap terminals are preferentially applicable to the RedCap-exclusive initial downlink BWP, only non-RedCap 5G terminals (hereinafter referred to as non-RedCap terminals) are applicable to the initial downlink BWP.

[0032] Step S12: The network side configures the first MBS common frequency resource in the initial downlink BWP to carry the MCCH (Multicast Control Channel) and MTCH (Multicast TrafficeChannel) channels of the MBS service. MCCH and MTCH are logical channels, which are carried by two physical channels, PDCCH (Physical Downlink Control Channel) and PDSCH (Physical Downlink Shared Channel). The existing PDSCH and PDCCH physical channels in the initial downlink BWP can be reused to carry the MCCH and MTCH logical channels.

[0033] The network side also configures a second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying MCCH and MTCH channels of MBS services. The network side configures PDSCH and PDCCH physical channels for the second MBS common frequency resource to carry MCCH and MTCH logical channels.

[0034] The MBS common frequency resource is composed of one or more resource blocks (RBs), and the resource block has dual characteristics of frequency domain and time domain. The first MBS common frequency resource and the second MBS common frequency resource may be the same or different. The network side may configure the same or different MBS services in the first MBS common frequency resource and the second MBS common frequency resource.

[0035] Step S13: When the non-RedCap terminal is in the RRC idle state or the RRC inactive state, the non-RedCap terminal receives MBS services on the first MBS common frequency resource, that is, receives MBS control information transmitted by the MCCH channel and MBS service information transmitted by the MTCH channel on the first MBS common frequency resource.

[0036] When the RedCap terminal is in the RRC idle state or the RRC inactive state, the RedCap terminal receives the MBS service on the second MBS common frequency resource, that is, receives the MBS control information transmitted by the MCCH channel and the MBS service information transmitted by the MTCH channel on the second MBS common frequency resource.

[0037] See also Figure 2, Embodiment 2 of the method for receiving MBS in a BWP containing NCD SSB proposed in this application includes the following steps. Embodiment 2 is that a 5G RedCap terminal receives MBS service in a dedicated downlink BWP containing NCD-SSB.

[0038] Step S21: The network side configures the same initial downlink BWP for non-RedCap terminals and RedCap terminals through SIB1. The initial downlink BWP includes CD-SSB and a complete control resource set No. 0.

[0039] Step S22: The network side configures a third MBS common frequency resource in the initial downlink BWP to carry the MCCH and MTCH channels of the MBS service. The MBS service is carried by the two logical channels MCCH and MTCH. The MCCH and MTCH are carried by the two physical channels PDCCH and PDSCH. Here, the existing PDCCH and PDSCH physical channels in the initial downlink BWP can be reused to carry the MCCH and MTCH logical channels.

[0040] Step S23: When the non-RedCap terminal or the RedCap terminal is in the RRC idle state or the RRC inactive state, the non-RedCap terminal or the RedCap terminal receives the MBS service through the third MBS common frequency resource, that is, receives the MBS control information transmitted by the MCCH channel and the MBS service information transmitted by the MTCH channel on the third MBS common frequency resource.

[0041] Step S24: When the RedCap terminal is in the RRC connected state, the network side configures a dedicated downlink BWP for the RedCap terminal. The dedicated downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB.

[0042] Step S25: The network side configures the fourth MBS common frequency resource in the dedicated downlink BWP for carrying the MCCH and MTCH channels of the MBS service. The network side also configures the PDSCH and PDCCH physical channels for the fourth MBS common frequency resource to carry the MCCH and MTCH logical channels. The information of the fourth MBS common frequency resource and the associated PDSCH and PDCCH channels is transmitted to the RedCap terminal by the network side by adding parameters in SIB1 or by RRC signaling (e.g., RRC reconfiguration signaling).

[0043] Alternatively, the step S25 is changed to step S25a. Step S25a: The RedCap terminal in the RRC connected state sends an MBS interest indication (MBS Interest Indication) signaling to the network side, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling. The network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. The network side also configures PDSCH and PDCCH physical channels for the fourth MBS common frequency resource to carry MCCH and MTCH logical channels.

[0044] The third MBS common frequency resource and the fourth MBS common frequency resource may be the same or different. The network side may configure the same or different MBS services on the third MBS common frequency resource and the fourth MBS common frequency resource.

[0045] Step S26: When the RedCap terminal is in the RRC connected state, the RedCap terminal receives MBS services through the fourth MBS common frequency resource, that is, receives MBS control information transmitted by the MCCH channel and MBS service information transmitted by the MTCH channel on the fourth MBS common frequency resource.

[0046] It can be seen from step S23 and step S26 that the second embodiment enables the RedCap terminal to continuously receive MBS services in the RRC idle state, the RRC inactive state, and the RRC connected state.

[0047] See also Figure 3 The third embodiment of the method for receiving MBS in a BWP containing NCD SSB proposed in this application includes the following steps. The third embodiment is that a RedCap terminal receives MBS service in a RedCap exclusive initial downlink BWP containing NCD-SSB and a dedicated downlink BWP containing NCD-SSB.

[0048] Step S31: Same as step S11.

[0049] Step S32: Same as step S12.

[0050] Step S33: Same as step S13.

[0051] Step S34: Same as step S24.

[0052] Step S35: the same as step S25 or step S25a. Preferably, the fourth MBS common frequency resource configured in step S35 is the same as the second MBS common frequency resource configured in step S32.

[0053] Step S36: Same as step S26.

[0054] It can be seen from step S33 and step S36 that embodiment 3 enables the RedCap terminal to continuously receive MBS services in the RRC idle state, the RRC inactive state, and the RRC connected state.

[0055] See also Figure 4 , Embodiment 4 of the method for receiving MBS in a BWP containing NCD SSB proposed in this application includes the following steps. Embodiment 4 is a method for receiving MBS service after a RedCap terminal switches from "an original cell containing a dedicated downlink BWP containing CD-SSB" to "a new cell containing a dedicated downlink BWP containing NCD-SSB".

[0056] Step S41: The RedCap terminal is in RRC connected state in cell A, and cell A configures a dedicated downlink BWP 1 for the RedCap terminal. The dedicated downlink BWP 1 includes CD-SSB and a complete control resource set No. 0. The RedCap terminal receives MBS services of cell A through the dedicated downlink BWP 1.

[0057] Step S42: When the RedCap terminal meets the switching conditions from cell A to cell B, for example, the RedCap terminal reports the cell switching related events to the network side, or the network side instructs the RedCap terminal to switch from cell A to cell B for the purpose of radio resource management, and cell B configures a dedicated downlink BWP 2 for the RedCap terminal. The dedicated downlink BWP 2 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB.

[0058] Step S43: After the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service. Cell B also configures PDSCH and PDCCH physical channels for the fifth MBS common frequency resource to carry the MCCH and MTCH logical channels.

[0059] Alternatively, the step S43 is changed to step S43a. Step S43a: The RedCap terminal in the RRC connected state sends an MBS interest indication signaling to cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling. During the process of negotiating the switching resources with cell B, cell A transmits the MBS interest indication signaling to cell B. When the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. Cell B also configures PDSCH and PDCCH physical channels for the fifth MBS common frequency resource to carry the MCCH and MTCH logical channels.

[0060] Alternatively, the step S43 is changed to step S43b. Step S43b: After the RedCap terminal switches to cell B, the RedCap terminal in the RRC connected state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling. Cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connected state. Cell B also configures PDSCH and PDCCH physical channels for the fifth MBS common frequency resource to carry the MCCH and MTCH logical channels.

[0061] Step S44: After the RedCap terminal switches to cell B, the RedCap terminal receives the MBS service of cell B through the fifth MBS common frequency resource, that is, receives the MBS control information transmitted by the MCCH channel and the MBS service information transmitted by the MTCH channel on the fifth MBS common frequency resource.

[0062] See also Figure 5 , Embodiment 5 of the method for receiving MBS in a BWP containing NCD SSB proposed in this application includes the following steps. Embodiment 5 is a method for receiving MBS service after a RedCap terminal switches from an "original cell containing a dedicated downlink BWP containing NCD-SSB" to a "new cell containing a dedicated downlink BWP containing NCD-SSB".

[0063] Step S51: The RedCap terminal is in the RRC connection state in cell A, and cell A configures a dedicated downlink BWP 1 for the RedCap terminal. The dedicated downlink BWP 1 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB. Cell A configures the sixth MBS common frequency resource in the dedicated downlink BWP 1 for carrying the MCCH and MTCH channels of the MBS service. The RedCap terminal receives the MBS service of cell A through the sixth MBS common frequency resource.

[0064] Step S52: Same as step S42.

[0065] Step S53: the same as step S43, or step S43a, or step S43b. Preferably, the fifth MBS common frequency resource configured by cell B in dedicated downlink BWP 2 is the same as the sixth MBS common frequency resource configured by cell A in dedicated downlink BWP 1.

[0066] Step S54: Same as step S44.

[0067] The fourth embodiment and the fifth embodiment both achieve that during the process of moving from one cell to another, the RedCap terminal can continuously receive the MBS service even in the RRC connected state.

[0068] See also Figure 6 The embodiment 1 of the system for receiving MBS in a BWP including NCD SSB proposed in the present application includes a RedCap exclusive initial downlink BWP configuration unit 11, a second MBS common frequency resource configuration unit 12, and an idle and inactive MBS service receiving unit 13. Figure 6 The system shown corresponds to Figure 1 The method shown.

[0069] The RedCap exclusive initial downlink BWP configuration unit 11 is used to configure the RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1 by the network side. The RedCap exclusive initial downlink BWP does not include CD-SSB or does not include the complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB.

[0070] The second MBS common frequency resource configuration unit 12 is used for the network side to configure the second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service. The network side also configures the PDSCH and PDCCH physical channels for the second MBS common frequency resource to carry the MCCH and MTCH logical channels.

[0071] The idle state and inactive state MBS service receiving unit 13 is used for the RedCap terminal to receive the MBS service on the second MBS common frequency resource when the RedCap terminal is in the RRC idle state or the RRC inactive state.

[0072] See also Figure 7 The second embodiment of the system for receiving MBS in a BWP containing NCD SSB proposed in the present application includes an initial downlink BWP configuration unit 21, a third MBS common frequency resource configuration unit 22, an idle and inactive MBS service receiving unit 23, a dedicated downlink BWP configuration unit 24, a fourth MBS common frequency resource configuration unit 25, and a connected MBS service receiving unit 26. Figure 7 The system shown corresponds to Figure 2 The method shown.

[0073] The initial downlink BWP configuration unit 21 is used to configure the same initial downlink BWP for non-RedCap terminals and RedCap terminals through SIB1 by the network side. The initial downlink BWP includes CD-SSB and a complete control resource set No. 0.

[0074] The third MBS common frequency resource configuration unit 22 is used for configuring the third MBS common frequency resource in the initial downlink BWP by the network side, for carrying the MCCH and MTCH channels of the MBS service.

[0075] The idle and inactive MBS service receiving unit 23 is used for receiving MBS services through the third MBS common frequency resource when the non-RedCap terminal or the RedCap terminal is in the RRC idle state or the RRC inactive state.

[0076] The dedicated downlink BWP configuration unit 24 is used for the network side to configure a dedicated downlink BWP for the RedCap terminal when the RedCap terminal is in the RRC connected state. The dedicated downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB.

[0077] The fourth MBS common frequency resource configuration unit 25 is used for the network side to configure the fourth MBS common frequency resource in the dedicated downlink BWP for carrying the MCCH and MTCH channels of the MBS service. The network side also configures the PDSCH and PDCCH physical channels for the fourth MBS common frequency resource to carry the MCCH and MTCH logical channels.

[0078] Alternatively, the fourth MBS common frequency resource configuration unit 25 is changed to the RedCap terminal in the RRC connection state to send an MBS interest indication signaling to the network side, and report the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling. The network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state. The network side also configures PDSCH and PDCCH physical channels for the fourth MBS common frequency resource to carry MCCH and MTCH logical channels.

[0079] The connected MBS service receiving unit 26 is configured to enable the RedCap terminal to receive MBS services through the fourth MBS common frequency resource when the RedCap terminal is in an RRC connected state.

[0080] See also Figure 8 The third embodiment of the system for receiving MBS in a BWP containing NCD SSB proposed in the present application includes a RedCap exclusive initial downlink BWP configuration unit 11, a second MBS public frequency resource configuration unit 12, an idle and inactive MBS service receiving unit 13, a dedicated downlink BWP configuration unit 24, a fourth MBS public frequency resource configuration unit 25, and a connected MBS service receiving unit 26. Figure 8 The system shown corresponds to Figure 3 The method shown. Figure 8 Some modules in Figure 6 The system shown is the same, and the remaining modules are the same Figure 7 The systems shown are identical.

[0081] See also Fig. 9 The fourth embodiment of the system for receiving MBS in a BWP containing NCD SSB proposed in the present application includes an original cell dedicated downlink BWP configuration unit 41, a new cell dedicated downlink BWP configuration unit 42, a fifth MBS common frequency resource configuration unit 43, and a post-switching MBS service receiving unit 44. Fig. 9 The system shown corresponds to Figure 4 The method shown.

[0082] The original cell dedicated downlink BWP configuration unit 41 is used for configuring a dedicated downlink BWP 1 for the RedCap terminal in cell A when the RedCap terminal is in RRC connection state in cell A. The dedicated downlink BWP 1 includes CD-SSB and a complete control resource set No. 0. The RedCap terminal receives the MBS service of cell A through the dedicated downlink BWP 1.

[0083] The new cell dedicated downlink BWP configuration unit 42 is used for configuring a dedicated downlink BWP 2 for the RedCap terminal in cell B when the RedCap terminal meets the switching condition from cell A to cell B. The dedicated downlink BWP 2 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB.

[0084] The fifth MBS common frequency resource configuration unit 43 is used for configuring the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service when the RedCap terminal switches to the cell B. The cell B also configures the PDSCH and PDCCH physical channels for the fifth MBS common frequency resource to carry the MCCH and MTCH logical channels.

[0085] Alternatively, the fifth MBS common frequency resource configuration unit 43 is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling. During the negotiation of switching resources with cell B, cell A transmits the MBS interest indication signaling to cell B. When the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state. Cell B also configures PDSCH and PDCCH physical channels for the fifth MBS common frequency resource to carry MCCH and MTCH logical channels.

[0086] Alternatively, the fifth MBS common frequency resource configuration unit 43 is changed to: when the RedCap terminal switches to cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling. Cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state. Cell B also configures PDSCH and PDCCH physical channels for the fifth MBS common frequency resource to carry the MCCH and MTCH logical channels.

[0087] The post-switching MBS service receiving unit 44 is configured to enable the RedCap terminal to receive the MBS service of the cell B through the fifth MBS common frequency resource after the RedCap terminal switches to the cell B.

[0088] See also Fig.10The fifth embodiment of the system for receiving MBS in a BWP including NCD SSB proposed in the present application includes a sixth MBS common frequency resource configuration unit 51, a new cell dedicated downlink BWP configuration unit 42, a fifth MBS common frequency resource configuration unit 43, and a post-switching MBS service receiving unit 44. Fig.10 The system shown corresponds to Figure 5 The method shown. Fig.10 Some modules in Fig. 9 The systems shown are identical.

[0089] The sixth MBS common frequency resource configuration unit 51 is used for configuring a dedicated downlink BWP 1 for the RedCap terminal in cell A when the RedCap terminal is in an RRC connected state in cell A. The dedicated downlink BWP 1 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets. The other control resource sets include an NCD-SSB. Cell A configures the sixth MBS common frequency resource in the dedicated downlink BWP 1 for carrying the MCCH and MTCH channels of the MBS service. The RedCap terminal receives the MBS service of cell A through the sixth MBS common frequency resource.

[0090] This application enables the RedCap terminal working in the downlink BWP containing NCD-SSB to support MBS services, that is, to allow the MBS service to be carried on the control resource set in the downlink BWP containing NCD-SSB, thereby expanding the application scope of the MBS service from "BWP containing CD-SSB" to "BWP containing NCD-SSB", greatly improving the utilization rate of the frequency domain resources of the mobile communication network.

[0091] 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. A method for receiving MBS in a BWP containing NCD SSB, characterized in that: The method comprises the following steps: Step S11: The network side configures a RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1; the RedCap exclusive initial downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; Step S12: The network side configures a second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying MCCH and MTCH channels of MBS services; Step S13: When the RedCap terminal is in the RRC idle state or the RRC inactive state, the RedCap terminal receives the MBS service on the second MBS common frequency resource.

2. A method for receiving MBS in a BWP containing NCD SSB, characterized in that: The method comprises the following steps: Step S21: The network side configures the same initial downlink BWP for the non-RedCap terminal and the RedCap terminal through SIB1; the initial downlink BWP includes CD-SSB and a complete control resource set No. 0; Step S22: The network side configures a third MBS common frequency resource in the initial downlink BWP for carrying MCCH and MTCH channels of MBS services; Step S23: When the non-RedCap terminal or the RedCap terminal is in the RRC idle state or the RRC inactive state, the non-RedCap terminal or the RedCap terminal receives the MBS service through the third MBS common frequency resource; Step S24: When the RedCap terminal is in the RRC connected state, the network side configures a dedicated downlink BWP for the RedCap terminal; the dedicated downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; Step S25: the network side configures a fourth MBS common frequency resource in the dedicated downlink BWP for carrying MCCH and MTCH channels of MBS services; Alternatively, the step S25 is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the network side, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Step S26: When the RedCap terminal is in the RRC connected state, the RedCap terminal receives the MBS service through the fourth MBS common frequency resource.

3. A method for receiving MBS in a BWP containing NCD SSB, characterized in that: The method comprises the following steps: Step S31: The network side configures a RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1; the RedCap exclusive initial downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; Step S32: The network side configures a second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying MCCH and MTCH channels of MBS services; Step S33: When the RedCap terminal is in the RRC idle state or the RRC inactive state, the RedCap terminal receives the MBS service on the second MBS common frequency resource; Step S34: When the RedCap terminal is in the RRC connected state, the network side configures a dedicated downlink BWP for the RedCap terminal; the dedicated downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; Step S35: the network side configures a fourth MBS common frequency resource in the dedicated downlink BWP for carrying MCCH and MTCH channels of MBS services; Alternatively, the step S35 is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the network side, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Step S36: When the RedCap terminal is in the RRC connected state, the RedCap terminal receives the MBS service through the fourth MBS common frequency resource.

4. A method for receiving MBS in a BWP containing NCD SSB, characterized in that: The method comprises the following steps: Step S41: the RedCap terminal is in an RRC connected state in cell A, and cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 includes a CD-SSB and a complete control resource set No. 0; the RedCap terminal receives the MBS service of cell A through the dedicated downlink BWP 1; Step S42: When the RedCap terminal meets the switching condition from cell A to cell B, cell B configures a dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; Step S43: After the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service; Alternatively, the step S43 is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; the cell A transmits the MBS interest indication signaling to the cell B during the negotiation of switching resources with the cell B; when the RedCap terminal switches to the cell B, the cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Alternatively, the step S43 is changed to: after the RedCap terminal switches to the cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; the cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Step S44: After the RedCap terminal switches to the cell B, the RedCap terminal receives the MBS service of the cell B through the fifth MBS common frequency resource.

5. A method for receiving MBS in a BWP containing NCD SSB, characterized in that: The method comprises the following steps: Step S51: the RedCap terminal is in the RRC connection state in cell A, and cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; cell A configures a sixth MBS common frequency resource in the dedicated downlink BWP 1 for carrying MCCH and MTCH channels of MBS services; the RedCap terminal receives MBS services of cell A through the sixth MBS common frequency resource; Step S52: When the RedCap terminal meets the switching condition from cell A to cell B, cell B configures a dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; Step S53: After the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service; Alternatively, the step S53 is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; the cell A transmits the MBS interest indication signaling to the cell B during the negotiation of switching resources with the cell B; when the RedCap terminal switches to the cell B, the cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Alternatively, the step S53 is changed to: after the RedCap terminal switches to the cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; the cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Step S54: After the RedCap terminal switches to the cell B, the RedCap terminal receives the MBS service of the cell B through the fifth MBS common frequency resource.

6. A system for receiving MBS in a BWP including NCD SSB, characterized in that: It includes a RedCap exclusive initial downlink BWP configuration unit, a second MBS public frequency resource configuration unit, and an idle and inactive MBS service receiving unit 1; The RedCap exclusive initial downlink BWP configuration unit is used for configuring the RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1 by the network side; the RedCap exclusive initial downlink BWP does not include CD-SSB or does not include the complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; The second MBS common frequency resource configuration unit is used for the network side to configure the second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service; The idle state and inactive state MBS service receiving unit is used for, when the RedCap terminal is in the RRC idle state or the RRC inactive state, the RedCap terminal receives the MBS service on the second MBS common frequency resource.

7. A system for receiving MBS in a BWP including NCD SSB, characterized in that: It includes an initial downlink BWP configuration unit, a third MBS public frequency resource configuration unit, an idle and inactive MBS service receiving unit 2, a dedicated downlink BWP configuration unit, a fourth MBS public frequency resource configuration unit, and a connected MBS service receiving unit; The initial downlink BWP configuration unit is used for configuring the same initial downlink BWP for non-RedCap terminals and RedCap terminals through SIB1 by the network side; the initial downlink BWP includes CD-SSB and a complete control resource set No. 0; The third MBS common frequency resource configuration unit is used for configuring the third MBS common frequency resource in the initial downlink BWP by the network side, for carrying the MCCH and MTCH channels of the MBS service; The idle and inactive MBS service receiving unit 2 is used for receiving the MBS service through the third MBS common frequency resource when the non-RedCap terminal or the RedCap terminal is in the RRC idle state or the RRC inactive state; The dedicated downlink BWP configuration unit is used for the network side to configure a dedicated downlink BWP for the RedCap terminal when the RedCap terminal is in an RRC connected state; the dedicated downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; The fourth MBS common frequency resource configuration unit is used for configuring the fourth MBS common frequency resource in the dedicated downlink BWP by the network side for carrying the MCCH and MTCH channels of the MBS service; Alternatively, the fourth MBS common frequency resource configuration unit is changed to the RedCap terminal in the RRC connection state sending an MBS interest indication signaling to the network side, and reporting the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; The connected MBS service receiving unit is configured to enable the RedCap terminal to receive MBS services through the fourth MBS common frequency resource when the RedCap terminal is in an RRC connected state.

8. A system for receiving MBS in a BWP including NCD SSB, characterized in that: It includes a RedCap exclusive initial downlink BWP configuration unit, a second MBS public frequency resource configuration unit, an idle and inactive MBS service receiving unit, a dedicated downlink BWP configuration unit, a fourth MBS public frequency resource configuration unit, and a connected MBS service receiving unit; The RedCap exclusive initial downlink BWP configuration unit is used for configuring the RedCap exclusive initial downlink BWP for the RedCap terminal through SIB1 by the network side; the RedCap exclusive initial downlink BWP does not include CD-SSB or does not include the complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; The second MBS common frequency resource configuration unit is used for the network side to configure the second MBS common frequency resource in the RedCap exclusive initial downlink BWP for carrying the MCCH and MTCH channels of the MBS service; The idle state and inactive state MBS service receiving unit is used for the RedCap terminal to receive the MBS service on the second MBS common frequency resource when the RedCap terminal is in the RRC idle state or the RRC inactive state; The dedicated downlink BWP configuration unit is used for the network side to configure a dedicated downlink BWP for the RedCap terminal when the RedCap terminal is in an RRC connected state; the dedicated downlink BWP does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; The fourth MBS common frequency resource configuration unit is used for configuring the fourth MBS common frequency resource in the dedicated downlink BWP by the network side for carrying the MCCH and MTCH channels of the MBS service; Alternatively, the fourth MBS common frequency resource configuration unit is changed to the RedCap terminal in the RRC connection state sending an MBS interest indication signaling to the network side, and reporting the frequency information that can be used by the MBS service in the dedicated downlink BWP through the parameters in the MBS interest indication signaling; the network side configures the fourth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; The connected MBS service receiving unit is configured to enable the RedCap terminal to receive MBS services through the fourth MBS common frequency resource when the RedCap terminal is in an RRC connected state.

9. A system for receiving MBS in a BWP including NCD SSB, characterized in that: It includes an original cell dedicated downlink BWP configuration unit, a new cell dedicated downlink BWP configuration unit, a fifth MBS public frequency resource configuration unit, and a post-switching MBS service receiving unit; The original cell dedicated downlink BWP configuration unit is used for, when the RedCap terminal is in the RRC connection state in the cell A, the cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 includes a CD-SSB and a complete control resource set No. 0; the RedCap terminal receives the MBS service of the cell A through the dedicated downlink BWP 1; The new cell dedicated downlink BWP configuration unit is used for, when the RedCap terminal meets the switching condition from cell A to cell B, cell B configures a dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; The fifth MBS common frequency resource configuration unit is used for, when the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service; Alternatively, the fifth MBS common frequency resource configuration unit is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; during the negotiation of switching resources with the cell B, the cell A transmits the MBS interest indication signaling to the cell B; when the RedCap terminal switches to the cell B, the cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Alternatively, the fifth MBS common frequency resource configuration unit is changed to: when the RedCap terminal switches to cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; The post-switching MBS service receiving unit is used for, after the RedCap terminal switches to the cell B, the RedCap terminal receiving the MBS service of the cell B through the fifth MBS common frequency resource.

10. A system for receiving MBS in a BWP including NCD SSB, characterized in that: It includes a sixth MBS common frequency resource configuration unit, a new cell dedicated downlink BWP configuration unit, a fifth MBS common frequency resource configuration unit, and a post-switching MBS service receiving unit; The sixth MBS common frequency resource configuration unit is used for, when the RedCap terminal is in the RRC connection state in the cell A, the cell A configures a dedicated downlink BWP 1 for the RedCap terminal; the dedicated downlink BWP 1 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; the cell A configures the sixth MBS common frequency resource in the dedicated downlink BWP 1 for carrying the MCCH and MTCH channels of the MBS service; the RedCap terminal receives the MBS service of the cell A through the sixth MBS common frequency resource; The new cell dedicated downlink BWP configuration unit is used for, when the RedCap terminal meets the switching condition from cell A to cell B, cell B configures a dedicated downlink BWP 2 for the RedCap terminal; the dedicated downlink BWP 2 does not include a CD-SSB or does not include a complete control resource set No. 0, but includes other control resource sets; the other control resource sets include an NCD-SSB; The fifth MBS common frequency resource configuration unit is used for, when the RedCap terminal switches to cell B, cell B configures the fifth MBS common frequency resource in the dedicated downlink BWP 2 for carrying the MCCH and MTCH channels of the MBS service; Alternatively, the fifth MBS common frequency resource configuration unit is changed to: the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to the cell A, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; during the negotiation of switching resources with the cell B, the cell A transmits the MBS interest indication signaling to the cell B; when the RedCap terminal switches to the cell B, the cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; Alternatively, the fifth MBS common frequency resource configuration unit is changed to: when the RedCap terminal switches to cell B, the RedCap terminal in the RRC connection state sends an MBS interest indication signaling to cell B, and reports the frequency information that can be used by the MBS service in the dedicated downlink BWP 2 through the newly added parameters in the MBS interest indication signaling; cell B configures the fifth MBS common frequency resource at the frequency reported by the RedCap terminal, which is used to carry the MCCH and MTCH channels of the MBS service in the RRC connection state; The post-switching MBS service receiving unit is used for, after the RedCap terminal switches to the cell B, the RedCap terminal receiving the MBS service of the cell B through the fifth MBS common frequency resource.

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