Method and device for monitoring MCCH channel of MBS

Abstract

The invention discloses a method for monitoring an MCCH channel of an MBS. A network side adds an MBS broadcast service indication and an MBS new configuration indication in a paging indication message issued to a mobile terminal. And the 5G terminal calculates and obtains the position of the boundary of the MCCH modification period mapped to the paging period and the position of the MCCH repetition period mapped to the paging period. And the 5G terminal enters an RRC idle state or an RRC inactive state, and monitors the paging indication message by taking the paging period configured by the 5G cell A as a period. According to the invention, the appropriate indication is added in the paging indication message to assist the 5G terminal in scheduling the MCCH receiving, so that the power consumption of the 5G terminal is reduced, and normal receiving of the MCCH by the 5G terminal is not affected.

Description

Technical Field

[0001] The present application relates to a method for a 5G mobile terminal to monitor the MCCH (MBS Control Channel) of MBS (Multicast and Broadcast Service). Background Art

[0002] The 3GPP Release 17 communication protocol introduced MBS services. For this purpose, the 5G mobile communication protocol added two new logical channels - MCCH and MTCH (MBS Traffic Channel, Multicast and Broadcast Service Traffic Channel). Both logical channels are mapped to the PDSCH (Downlink Physical Shared Channel, Downlink Physical Shared Channel) physical channel. The network side transmits MBS broadcast configuration messages on the MCCH channel and transmits MBS service data on the MTCH channel.

[0003] The network side transmits a DCI (Downlink Control Information) message with a format of 4_0 on the PDCCH (Physical Downlink Control Channel) physical channel, and indicates the transmission of the MBS broadcast configuration message on the MCCH logical channel through the MCCH notification in the DCI 4_0 message. When the MBS broadcast configuration message changes, the network side indicates the change of the MBS broadcast configuration message on the MCCH channel through the MCCH notification in the DCI 4_0 message carried on the PDCCH channel.

[0004] The time period during which the network side sends the MBS broadcast configuration message on the MCCH channel is called the MCCH sending window (MCCH window). The MCCH sending window defines the time slot (slot) during which the network side sends the MBS broadcast configuration message on the MCCH channel, which may be one or more time slots.

[0005] The network side repeatedly sends the MBS broadcast configuration message on the MCCH channel at a configurable period. This configurable period is the MCCH repetition period. The MCCH repetition period defines the period at which the MCCH transmission window recurs. The DCI 4_0 message is also sent once in each MCCH repetition period.

[0006] The change of MBS broadcast configuration message only occurs in a specific radio frame (RF, radio frame). The period of this specific radio frame is the MCCH modification period. In an MCCH modification period, the MBS broadcast configuration message transmitted on the MCCH channel does not change. The MCCH modification period defines the position of the radio frame where the MBS broadcast configuration message sent on the MCCH channel changes.

[0007] MCCH modification period ≥ MCCH repetition period ≥ duration of MCCH sending window. One MCCH modification period usually contains multiple MCCH repetition periods, and one MCCH repetition period contains only one MCCH sending window. When the MBS broadcast configuration message changes, starting from the specific radio frame, the network side repeatedly sends the modified MBS broadcast configuration message multiple times (once in each MCCH repetition period). If the MBS broadcast configuration message changes, in each MCCH repetition period within the MCCH modification period, the MCCH notification in the DCI 4_0 message on the PDCCH channel will be set to true (TRUE) to indicate that the MBS broadcast configuration message on the MCCH channel has changed.

[0008] The reception configuration information of MBS service is divided into two parts. First, the network side sends the frequency resource-related information of MCCH channel and MTCH channel in SIB20 (system information block type 20), as well as parameters such as MCCH transmission window, MCCH repetition period, and MCCH modification period. Second, the network side sends the MBS broadcast configuration message on the MCCH channel. The MBS broadcast configuration message provides session and service-related information, as well as parameters related to the MTCH period.

[0009] In order to establish the MBS broadcast service normally, the 5G terminal needs to receive the MBS broadcast configuration message on the MCCH channel. In order to receive the modified MBS broadcast configuration message sent by the network side in time, the 5G terminal needs to periodically monitor the MCCH notification in the DCI 4_0 message on the PDCCH channel. When the 5G terminal monitors that the content of the MCCH notification indicates that the MBS broadcast configuration message on the MCCH channel has changed, the 5G terminal should go to the MCCH channel to receive the new MBS broadcast configuration message in the current time slot when the MCCH notification is received.

[0010] 5G terminals are sensitive to power consumption. When 5G terminals schedule and receive MBS broadcast configuration messages on the MCCH channel, it will consume a certain amount of power. In particular, when the MCCH modification period and MCCH repetition period are configured to be relatively small, it will significantly increase power consumption. Summary of the invention

[0011] The technical problem to be solved by this application is: how to minimize power consumption while not affecting the reception of MBS broadcast services by 5G mobile terminals.

[0012] In order to solve the above technical problems, the present application proposes a method for monitoring the MCCH channel of MBS, comprising the following steps. Step S1: The network side adds "MBS broadcast service indication" and "MBS new configuration indication" in the paging indication message sent to the mobile terminal. The value of the MBS broadcast service indication is set to 1 to indicate that the current cell has an ongoing MBS broadcast service, or the current cell has an MBS broadcast service to be carried out; it is set to 0 to indicate that the current cell has no ongoing MBS broadcast service, and the current cell has no MBS broadcast service to be carried out. The value of the MBS new configuration indication is set to 1 to indicate that the network side has a new MBS broadcast configuration message to be sent in the subsequent paging cycle; it is set to 0 to indicate that the network side has no new MBS broadcast configuration message to be sent in the subsequent paging cycle. Step S2: The 5G terminal normally resides in a 5G cell A that provides MBS services; the 5G terminal calculates the position of the boundary of the MCCH modification period mapped to the paging cycle and the position of the MCCH repetition period mapped to the paging cycle according to the parameters of the MCCH sending window, MCCH repetition period, and MCCH modification period recorded in SIB20. Step S3: The 5G terminal receives the MBS user service declaration issued by the 5G cell A, and then the 5G terminal enters the RRC idle state or the RRC inactive state, and monitors the paging indication message periodically according to the paging cycle configured by the 5G cell A. If the 5G terminal currently has no valid MBS broadcast configuration information, proceed to step S4. If the 5G terminal currently has valid MBS broadcast configuration information, proceed to step S5. Step S4: The 5G terminal monitors the paging indication message at the timing of each paging indication message within the paging cycle. If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal does not need to schedule the reception of the MBS broadcast configuration message within the paging cycle, and returns to step S4. If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 1, the 5G terminal schedules to receive the MBS broadcast configuration message on the MCCH channel in the nearest MCCH sending window after the paging indication message, and the 5G terminal enters step S5 after receiving the valid MBS broadcast configuration message. Step S5: The 5G terminal monitors the paging indication message at the timing of each paging indication message within the paging cycle. If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal stops receiving the current MBS broadcast service and then enters step S4.If the 5G terminal monitors that the value of the MBS broadcast service indication in the paging indication message is 1 during a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 0, the 5G terminal has no need to receive the MBS broadcast configuration message and then returns to step S5. If the 5G terminal monitors that the value of the MBS broadcast service indication in the paging indication message is 1 during a certain paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 1, the 5G terminal determines whether the boundary of the MCCH modification cycle is mapped in the previous paging cycle; if the boundary of the MCCH modification cycle is mapped in the previous paging cycle, the 5G terminal selects the nearest MCCH sending window after the paging indication message to listen to and receive the MBS broadcast configuration message on the MCCH channel, otherwise the 5G terminal receives the MBS broadcast configuration message at the nearest MCCH sending window position after the next MCCH modification cycle boundary; after receiving the valid MBS broadcast configuration message newly configured on the network side, the 5G terminal modifies the local configuration according to the latest received MBS broadcast configuration message, and starts to receive the new MBS service; if the new MBS broadcast configuration message indicates that all MBS broadcast services are stopped, then enters step S4; if the new MBS broadcast configuration message does not indicate that all MBS broadcast services are stopped, then enters step S5.

[0013] Alternatively, in step S1, the value of the MBS new configuration indication is set to 1 to indicate that the network side sent a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent; and is set to 0 to indicate that the network side did not send a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent.

[0014] Furthermore, in step S2, when the MCCH modification period configured by the network side is equal to the paging period, the position where the boundary of each MCCH modification period is mapped to the paging period is fixed.

[0015] Furthermore, in step S2, when the MCCH modification period configured by the network side is greater than the paging period, the MCCH modification period must be an integer multiple of the paging period; at this time, the position where the boundary of each MCCH modification period is mapped to each integer number of paging periods is fixed.

[0016] Furthermore, in step S2, when the MCCH modification period configured by the network side is smaller than the paging period, the paging period must be an integer multiple of the MCCH modification period; at this time, the position where the boundary of each integer MCCH modification period is mapped to each paging period is fixed.

[0017] Furthermore, in step S2, the position of each MCCH repetition period mapped to the paging cycle is obtained according to the number of MCCH repetition periods included in each MCCH modification period.

[0018] Furthermore, in step S4 and step S5, if the 5G terminal fails to monitor a valid paging indication message at the timing of all paging indication messages within the paging cycle, or the 5G terminal fails to receive a correct MBS broadcast configuration message in all MCCH sending windows within the paging cycle, the 5G terminal schedules to receive the MBS broadcast configuration message in each subsequent MCCH sending window.

[0019] The present application also proposes a device for monitoring the MCCH channel of MBS, including a newly added indication unit, a period mapping unit, a DRX state monitoring unit, a first processing unit, and a second processing unit. The newly added indication unit is used to add "MBS broadcast service indication" and "MBS new configuration indication" to the paging indication message sent from the network side to the mobile terminal; the value of the MBS broadcast service indication is set to 1 to indicate that the current cell has an ongoing MBS broadcast service, or the current cell has an upcoming MBS broadcast service; it is set to 0 to indicate that the current cell has no ongoing MBS broadcast service, and the current cell has no upcoming MBS broadcast service; the value of the MBS new configuration indication is set to 1 to indicate that the network side has a new MBS broadcast configuration message to send in the subsequent paging cycle; it is set to 0 to indicate that the network side has no new MBS broadcast configuration message to send in the subsequent paging cycle. The period mapping unit is used to calculate the position of the boundary of the MCCH modification period mapped to the paging period, and the position of the MCCH repetition period mapped to the paging period, when the 5G terminal normally resides in a 5G cell A providing MBS services, according to the parameters of the MCCH transmission window, MCCH repetition period, and MCCH modification period recorded in SIB20. The DRX state monitoring unit is used for the 5G terminal to receive the MBS user service declaration issued by the 5G cell A, and then the 5G terminal enters the RRC idle state or the RRC inactive state, and monitors the paging indication message with the paging period configured by the 5G cell A as the period; if the 5G terminal currently has no valid MBS broadcast configuration information, the first processing unit will continue to process it; if the 5G terminal currently has valid MBS broadcast configuration information, the second processing unit will continue to process it. The first processing unit is used to enable the 5G terminal to monitor the paging indication message at the timing of each paging indication message within the paging cycle; if the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal does not need to schedule the reception of the MBS broadcast configuration message on the MCCH channel within the current paging cycle, and returns to the first processing unit to continue processing; if the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 1, the 5G terminal schedules the reception of the MBS broadcast configuration message on the MCCH channel in the nearest MCCH sending window after the paging indication message, and after the 5G terminal receives the valid MBS broadcast configuration message, it is subsequently processed by the second processing unit.The second processing unit is used to monitor the paging indication message at the timing of each paging indication message within the paging cycle by the 5G terminal; if the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal stops receiving the current MBS broadcast service, and the first processing unit continues to process it subsequently; if the 5G terminal monitors the value of the MBS broadcast service indication in the paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 0, the 5G terminal has no need to receive the MBS broadcast configuration message, and the second processing unit continues to process it subsequently; if the 5G terminal monitors the value of the MBS broadcast service indication in the paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 0, the 5G terminal has no need to receive the MBS broadcast configuration message, and the second processing unit continues to process it subsequently; The value of the BS new configuration indication is 1, and the 5G terminal determines whether the boundary of the MCCH modification cycle is mapped in the previous paging cycle; if the boundary of the MCCH modification cycle is mapped in the previous paging cycle, the 5G terminal selects the MCCH sending window opportunity closest to the paging indication message to listen to and receive the MBS broadcast configuration message on the MCCH channel, otherwise the 5G terminal receives the MBS broadcast configuration message at the MCCH sending window position closest to the next MCCH modification cycle boundary; after the 5G terminal receives the valid MBS broadcast configuration message newly configured on the network side, it modifies the local configuration according to the latest received MBS broadcast configuration message, and starts to receive the new MBS service; if the new MBS broadcast configuration message indicates that all MBS broadcast services are stopped, the first processing unit will continue to process it; if the new MBS broadcast configuration message does not indicate that all MBS broadcast services are stopped, the second processing unit will continue to process it.

[0020] Further, the value of the MBS new configuration indication is set to 1 to indicate that the network side sent a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent; and is set to 0 to indicate that the network side did not send a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent.

[0021] The technical effect achieved by the present application is: adding appropriate indications in the paging indication message to assist the 5G terminal in scheduling the reception of the MCCH channel, so as to reduce the power consumption of the 5G terminal, while not affecting the normal reception of the MCCH channel by the 5G terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1a and Figure 1b It is a flowchart of the method for monitoring the MCCH channel of MBS proposed in this application.

[0023] Figure 2 It is a schematic diagram of the mapping relationship when the MCCH modification period is equal to the paging period.

[0024] Figure 3 It is a schematic diagram of the mapping relationship when the MCCH modification period is greater than the paging period.

[0025] Figure 4 It is a schematic diagram of the mapping relationship when the MCCH modification period is smaller than the paging period.

[0026] Figure 5 It is a structural diagram of the device for monitoring the MCCH channel of MBS proposed in this application.

[0027] Explanation of the reference numerals in the figure: newly added indication unit 1, cycle mapping unit 2, DRX status monitoring unit 3, first processing unit 4, second processing unit 5. DETAILED DESCRIPTION

[0028] In order to receive MBS broadcast services normally, 5G terminals need to monitor changes in MBS broadcast services in a timely manner, which requires timely receipt of the latest MBS broadcast configuration messages.

[0029] Scenario 1: After receiving all SIB20 information, the 5G terminal needs to receive the MBS broadcast configuration message according to the communication protocol requirements. If the current cell does not have an ongoing or upcoming MBS broadcast service, the network side will not send the MBS broadcast configuration message in the MCCH sending window for a period of time. If the 5G terminal schedules to receive the MBS broadcast configuration message on the MCCH channel during this period when the network side does not send the MBS broadcast configuration message, it will cause power waste.

[0030] Scenario 2: After a certain MCCH modification cycle starts, if the 5G terminal does not receive the MBS broadcast configuration message in the front MCCH sending window within the MCCH modification cycle - for example, the correct DCI 4_0 message is not decoded on the PDCCH channel, or the correct MBS broadcast configuration message is not decoded on the MCCH channel, etc., in order to confirm as soon as possible whether the new MBS broadcast configuration message is missed, the 5G terminal needs to monitor and receive the DCI 4_0 message on the PDCCH channel in each subsequent MCCH sending window position, which will cause a certain amount of power waste.

[0031] Scenario 3: After each MCCH modification period starts, the 5G terminal needs to receive the DCI 4_0 message on the PDCCH channel to obtain the MCCH notification to monitor whether the network has configured a new MBS broadcast configuration message or a new MBS service has started. When the MCCH modification period or MCCH repetition period configured by the network is relatively small, the 5G terminal needs to schedule and receive DCI 4_0 messages frequently, resulting in increased power consumption.

[0032] When the above situation occurs, more power consumption will be generated because the 5G terminal receives MBS broadcast configuration messages or DCI 4_0 messages more frequently.

[0033] See also Figure 1a and Figure 1b The method for monitoring the MCCH channel of MBS proposed in this application includes the following steps.

[0034] Step S1: The network side adds two new contents in the paging indication (PI) message sent to the mobile terminal. One of the new contents is "MBS broadcast service indication", the length of which is, for example, 1 bit. The other new content is "MBS new configuration indication", the length of which is, for example, 1 bit.

[0035] The paging indication message refers to a DCI message in the format of 1_0, which is scrambled with P-RNTI (Paging–Radio Network Temporary Identifier) ​​and sent on the PDCCH channel corresponding to the paging message. In addition to indicating that the terminal receives the paging message, the paging indication message can also be used to notify system message changes, ETWS (Earthquake and Tsunami Warning System), etc.

[0036] The value of the MBS broadcast service indication is set to 1 to indicate that the current cell has an ongoing MBS broadcast service or an upcoming MBS broadcast service. The value of the MBS broadcast service indication is set to 0 to indicate that the current cell has no ongoing MBS broadcast service and no upcoming MBS broadcast service.

[0037] If the network side can predict that a new MBS broadcast configuration message needs to be sent in the next paging cycle before sending the paging indication message (the first scenario), the value of the MBS new configuration indication is set to 1 to indicate that the network side has a new MBS broadcast configuration message to send in the subsequent paging cycle. The value of the MBS new configuration indication is set to 0 to indicate that the network side has no new MBS broadcast configuration message to send in the subsequent paging cycle. This is the first definition of the MBS new configuration indication, corresponding to the first scenario.

[0038] If the network side cannot predict that a new MBS broadcast configuration message needs to be sent in the next paging cycle before sending the paging indication message (the second scenario), the value of the MBS new configuration indication is set to 1 to indicate that the network side sent a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current paging indication message. The value of the MBS new configuration indication is set to 0 to indicate that the network side did not send a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current paging indication message. This is the second definition of the MBS new configuration indication, corresponding to the second scenario.

[0039] Step S2: The 5G terminal normally resides in a 5G cell A providing MBS services. The 5G terminal receives MBS-related system messages SIB20 and SIB21 sent by the 5G cell A. The 5G terminal calculates the position of the MCCH modification period boundary (MCCH ModificationBoundary, MMB) mapped to the paging cycle according to the parameters of the MCCH transmission window, MCCH repetition period, and MCCH modification period recorded in SIB20, and also calculates the position of the MCCH repetition period mapped to the paging cycle.

[0040] See also Figures 2 to 4 , there is a paging cycle between every two paging indication messages (vertical lines marked as PI), and there is a MCCH modification cycle between every two MCCH modification cycle boundaries (vertical lines marked as MMB). Figure 2 In the case where the MCCH modification period configured by the network side is equal to the paging period, the position where the boundary of each MCCH modification period is mapped to the paging period is fixed, such as Figure 2 When the MCCH modification period configured by the network side is greater than the paging period, from the parameters that the network side can configure for the paging period and the MCCH modification period, the MCCH modification period must be an integer multiple of the paging period. Figure 3 The MCCH modification period configured by the network side is equal to 2 times (expandable to 2 m times, m is a positive integer) paging cycle, at this time, the boundary of each MCCH modification cycle is mapped to every 2 (expandable to every 2 mThe position in the paging cycle is fixed, such as Figure 3 When the MCCH modification period configured by the network side is smaller than the paging period, from the parameters that the network side can configure for the paging period and the MCCH modification period, the paging period must be an integer multiple of the MCCH modification period. Figure 4 The paging cycle configured on the network side is equal to 2 times (expandable to 2 n times, n is a positive integer) MCCH modification period, at this time every 2 (expandable to every 2 n The position of the MCCH modification cycle boundary mapped to each paging cycle is fixed, such as Figure 4 According to the number of MCCH repetition periods included in each MCCH modification period, the position of each MCCH repetition period mapped to the paging cycle can be obtained.

[0041] The location where the 5G terminal receives the paging message has a fixed radio frame number and repeats according to the paging cycle. The radio frame number of the starting point of the MBS modification cycle is also fixed and repeats according to the MBS modification cycle. Figures 2 to 4 It can be seen from the three cases shown that any case can map the boundary of the MBS modification period to a fixed position in the paging period. Therefore, the present application proposes to add a suitable indication in the paging indication message to assist the 5G terminal in scheduling MCCH reception to achieve the purpose of saving power consumption.

[0042] Step S3: The 5G terminal receives the MBS user service statement issued by the 5G cell A, and then the 5G terminal enters the RRC idle state (RRC IDLE) or the RRC inactive state (RRC INACTIVE), and monitors the paging indication message periodically with the paging cycle (Paging Cycle) configured by the 5G cell A. Both the RRC idle state and the RRC inactive state belong to the discontinuous reception (DRX) state. This application allows the 5G terminal to use the paging cycle instead of the MCCH modification cycle to monitor the MCCH channel in the discontinuous reception state, which saves power.

[0043] If the 5G terminal currently does not have valid MBS broadcast configuration information, that is, the MBS broadcast configuration information has not been correctly received before, then enter step S4.

[0044] If the 5G terminal currently has valid MBS broadcast configuration information, that is, the MBS broadcast configuration information has been correctly received before, then enter step S5.

[0045] Step S4: The 5G terminal monitors the paging indication message at the timing (position) of each paging indication message within the paging cycle.

[0046] If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, it means that the 5G cell A has no ongoing or upcoming MBS broadcast service, so the 5G terminal does not need to schedule the reception of the MBS broadcast configuration message on the MCCH channel within the paging cycle, and then returns to step S4. At this time, the 5G terminal does not need to monitor the DCI 4_0 message within the paging cycle, which can reduce the reception scheduling of the 5G terminal, increase the sleep time of the 5G terminal, and reduce its power consumption.

[0047] If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 1, it indicates that the 5G cell A has an ongoing or upcoming MBS broadcast service. The 5G terminal schedules the reception of the MBS broadcast configuration message on the MCCH channel in the nearest MCCH transmission window after the paging indication message, and the 5G terminal enters step S5 after receiving the valid MBS broadcast configuration message.

[0048] Step S5: The 5G terminal monitors the paging indication message at the timing (position) of each paging indication message within the paging cycle.

[0049] If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, it means that the 5G cell A has no ongoing or upcoming MBS broadcast service, so the 5G cell A will not schedule the sending of the MBS broadcast configuration message on the MCCH channel in the MCCH sending window. This situation should be that the 5G terminal missed the configuration message for receiving the MBS service stop. At this time, the 5G terminal stops receiving the current MBS broadcast service and then enters step S4.

[0050] If the 5G terminal monitors that the value of the MBS broadcast service indication in the paging indication message is 1 during a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message (regardless of whether the first definition or the second definition is used) is 0, the 5G terminal has no need to receive the MBS broadcast configuration message and then returns to step S5.

[0051] If the 5G terminal monitors the value of the MBS broadcast service indication in the paging indication message as 1 at the time of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message (regardless of whether the first definition or the second definition is used) is 1, the 5G terminal determines whether the boundary of the MCCH modification cycle is mapped in the previous paging cycle. If the boundary of the MCCH modification cycle is mapped in the previous paging cycle, the 5G terminal selects the nearest MCCH sending window opportunity after the paging indication message to listen to and receive the MBS broadcast configuration message on the MCCH channel. If the boundary of the MCCH modification cycle is not mapped in the previous paging cycle, the 5G terminal receives the MBS broadcast configuration message at the nearest MCCH sending window position after the next MCCH modification cycle boundary. After the 5G terminal receives a valid MBS broadcast configuration message newly configured by the network side (which is different from the MBS broadcast configuration message already locally in the 5G terminal), the 5G terminal modifies the local configuration according to the latest received MBS broadcast configuration message and starts receiving new MBS services. If the new MBS broadcast configuration message indicates that all MBS broadcast services are stopped, then the process goes to step S4. If the new MBS broadcast configuration message does not indicate that all MBS broadcast services are stopped, then the process goes to step S5.

[0052] In the step S4 and step S5, if the 5G terminal does not listen to a valid paging indication message at the timing of all paging indication messages in the paging cycle, or the 5G terminal does not receive the correct MBS broadcast configuration message in all MCCH sending windows in the paging cycle, this situation indicates that the reception quality of the downlink communication is relatively poor. At this time, power consumption is not the first concern of the 5G terminal. The 5G terminal can schedule the reception of the MBS broadcast configuration message in each subsequent MCCH sending window. Alternatively, when the 5G terminal does not listen to a valid paging indication message at the timing of all paging indication messages in the paging cycle, the 5G terminal no longer listens to the DCI 4_0 message in the paging cycle. Alternatively, when the 5G terminal listens to a valid paging indication message at the timing of a certain paging indication message in the paging cycle, but all subsequent MCCH sending windows in the paging cycle do not receive the correct MBS broadcast configuration message, enter step S3. This situation is not the focus of this application, so the processing of this situation is not described in detail.

[0053] See also Figure 5 The device for monitoring the MCCH channel of MBS proposed in the present application includes a newly added indication unit 1, a cycle mapping unit 2, a DRX state monitoring unit 3, a first processing unit 4, and a second processing unit 5. Figure 5 The device shown corresponds to Figure 1a and Figure 1b The method shown.

[0054] The newly added indication unit 1 is used to add "MBS broadcast service indication" and "MBS new configuration indication" to the paging indication message sent by the network side to the mobile terminal. The value of the MBS broadcast service indication is set to 1 to indicate that the current cell has an ongoing MBS broadcast service, or the current cell has an MBS broadcast service to be carried out; it is set to 0 to indicate that the current cell has no ongoing MBS broadcast service, and the current cell has no MBS broadcast service to be carried out. The value of the MBS new configuration indication is set to 1 to indicate that the network side has a new MBS broadcast configuration message to be sent in the subsequent paging cycle; it is set to 0 to indicate that the network side has no new MBS broadcast configuration message to be sent in the subsequent paging cycle. Alternatively, the value of the MBS new configuration indication is set to 1 to indicate that the network side has sent a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent; it is set to 0 to indicate that the network side has not sent a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent.

[0055] The periodic mapping unit 2 is used to, when the 5G terminal normally resides in a 5G cell A providing MBS services, receive the MBS-related system messages SIB20 and SIB21 sent by the 5G cell A. The 5G terminal calculates the position of the boundary of the MCCH modification period mapped to the paging cycle according to the parameters of the MCCH sending window, MCCH repetition period, and MCCH modification period recorded in SIB20, and also calculates the position of the MCCH repetition period mapped to the paging cycle.

[0056] The DRX state monitoring unit 3 is used for the 5G terminal to receive the MBS user service declaration issued by the 5G cell A, and then the 5G terminal enters the RRC idle state or the RRC inactive state, and monitors the paging indication message with the paging cycle configured by the 5G cell A as a period. If the 5G terminal currently has no valid MBS broadcast configuration information, the first processing unit 4 will continue to process it. If the 5G terminal currently has valid MBS broadcast configuration information, the second processing unit 5 will continue to process it.

[0057] The first processing unit 4 is used for the 5G terminal to monitor the paging indication message at the timing of each paging indication message within the paging cycle. If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal does not need to schedule the reception of the MBS broadcast configuration message on the MCCH channel within the current paging cycle, and returns to the first processing unit 4 to continue processing. If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 1, the 5G terminal schedules the reception of the MBS broadcast configuration message on the MCCH channel in the nearest MCCH sending window after the paging indication message. After the 5G terminal receives the valid MBS broadcast configuration message, the second processing unit 5 continues to process it.

[0058] The second processing unit 5 is used for the 5G terminal to monitor the paging indication message at the timing of each paging indication message within the paging cycle. If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal stops receiving the current MBS broadcast service, and the first processing unit 4 continues to process it. If the 5G terminal monitors the value of the MBS broadcast service indication in the paging indication message as 1 at the timing of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 0, the 5G terminal has no need to receive the MBS broadcast configuration message, and the second processing unit 5 continues to process it. If the 5G terminal monitors the value of the MBS broadcast service indication in the paging indication message as 1 at the timing of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 1, the 5G terminal determines whether the boundary of the MCCH modification cycle is mapped in the previous paging cycle. If the boundary of the MCCH modification period is mapped in the previous paging cycle, the 5G terminal selects the nearest MCCH sending window opportunity after the paging indication message to listen to and receive the MBS broadcast configuration message on the MCCH channel. If the boundary of the MCCH modification period is not mapped in the previous paging cycle, the 5G terminal receives the MBS broadcast configuration message at the nearest MCCH sending window position after the next MCCH modification period boundary. After receiving the valid MBS broadcast configuration message newly configured on the network side, the 5G terminal modifies the local configuration according to the latest received MBS broadcast configuration message and starts to receive new MBS services. If the new MBS broadcast configuration message indicates that all MBS broadcast services are stopped, the first processing unit 4 will continue to process it. If the new MBS broadcast configuration message does not indicate that all MBS broadcast services are stopped, the second processing unit 5 will continue to process it.

[0059] The present application can achieve the following technical effects. First, because the paging indication message must be received by the 5G terminal, the two newly added indications in the paging indication message are used as indications of the MCCH message, and no additional scheduling and decoding power consumption is generated for the 5G terminal. Second, if the current 5G service cell supports the MBS broadcast function, but there is no ongoing broadcast service, the 5G terminal does not need to monitor the reception of the DCI 4_0 message on the MCCH channel all the time according to the value of the MBS broadcast service indication in the paging indication being 0. This reduces the scheduling and reception of the DCI 4_0 message and can reduce the power consumption of the 5G terminal. Third, when the network side does not change the MBS broadcast configuration message in the next MCCH modification period, the 5G terminal can be based on the MBS new configuration indication value in the paging indication message being 0, and does not need to monitor the reception of the DCI4_0 message in the next MCCH modification period. This reduces the scheduling and reception of the DCI 4_0 message and can reduce the power consumption of the 5G terminal; especially when the MBS modification period is configured to be relatively small, the effect of saving the power consumption of the 5G terminal is more obvious.

[0060] 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 monitoring the MCCH channel of MBS, characterized in that: The method comprises the following steps: Step S1: The network side adds "MBS broadcast service indication" and "MBS new configuration indication" to the paging indication message sent to the mobile terminal; The value of the MBS broadcast service indication is set to 1 to indicate that the current cell has an ongoing MBS broadcast service or that the current cell has an upcoming MBS broadcast service; the value of the MBS broadcast service indication is set to 0 to indicate that the current cell has no ongoing MBS broadcast service and that the current cell has no upcoming MBS broadcast service; The value of the MBS new configuration indication is set to 1 to indicate that the network side has a new MBS broadcast configuration message to send in the subsequent paging cycle; and is set to 0 to indicate that the network side has no new MBS broadcast configuration message to send in the subsequent paging cycle; Step S2: The 5G terminal normally resides in a 5G cell A providing MBS services; the 5G terminal calculates the position of the MCCH modification period boundary mapped to the paging period and the position of the MCCH repetition period mapped to the paging period according to the parameters of the MCCH transmission window, MCCH repetition period, and MCCH modification period recorded in SIB20; Step S3: The 5G terminal receives the MBS user service declaration issued by the 5G cell A, and then the 5G terminal enters the RRC idle state or the RRC inactive state, and monitors the paging indication message periodically with the paging cycle configured by the 5G cell A; If the 5G terminal currently has no valid MBS broadcast configuration information, proceed to step S4; If the 5G terminal currently has valid MBS broadcast configuration information, proceed to step S5; Step S4: the 5G terminal monitors the paging indication message at each paging indication message timing within the paging cycle; If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal does not need to schedule reception of the MBS broadcast configuration message within the paging cycle, and returns to step S4; If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 1, the 5G terminal schedules to receive the MBS broadcast configuration message on the MCCH channel in the nearest MCCH sending window after the paging indication message, and the 5G terminal enters step S5 after receiving the valid MBS broadcast configuration message; Step S5: The 5G terminal monitors the paging indication message at each paging indication message timing within the paging cycle; If the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal stops receiving the current MBS broadcast service and then enters step S4; If the 5G terminal monitors that the value of the MBS broadcast service indication in the paging indication message is 1 at the timing of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 0, the 5G terminal has no need to receive the MBS broadcast configuration message, and then returns to step S5; If the 5G terminal monitors that the value of the MBS broadcast service indication in the paging indication message is 1 during a certain paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 1, the 5G terminal determines whether the boundary of the MCCH modification cycle is mapped in the previous paging cycle; if the boundary of the MCCH modification cycle is mapped in the previous paging cycle, the 5G terminal selects the nearest MCCH sending window after the paging indication message to listen to and receive the MBS broadcast configuration message on the MCCH channel, otherwise the 5G terminal receives the MBS broadcast configuration message at the nearest MCCH sending window position after the next MCCH modification cycle boundary; after receiving the valid MBS broadcast configuration message newly configured on the network side, the 5G terminal modifies the local configuration according to the latest received MBS broadcast configuration message, and starts to receive the new MBS service; if the new MBS broadcast configuration message indicates that all MBS broadcast services are stopped, then enters step S4; if the new MBS broadcast configuration message does not indicate that all MBS broadcast services are stopped, then enters step S5.

2. The method for monitoring the MCCH channel of MBS according to claim 1, characterized in that: In the step S1, the value of the MBS new configuration indication is set to 1 to indicate that the network side sent a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent; and is set to 0 to indicate that the network side did not send a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent.

3. The method for monitoring the MCCH channel of MBS according to claim 1, characterized in that: In step S2, when the MCCH modification period configured by the network side is equal to the paging period, the position where the boundary of each MCCH modification period is mapped to the paging period is fixed.

4. The method for monitoring the MCCH channel of MBS according to claim 1, characterized in that: In step S2, when the MCCH modification period configured by the network side is greater than the paging period, the MCCH modification period must be an integer multiple of the paging period; at this time, the position where the boundary of each MCCH modification period is mapped to each integer number of paging periods is fixed.

5. The method for monitoring the MCCH channel of MBS according to claim 1, characterized in that: In step S2, when the MCCH modification period configured by the network side is smaller than the paging period, the paging period must be an integer multiple of the MCCH modification period; at this time, the position where the boundary of each integer MCCH modification period is mapped to each paging period is fixed.

6. The method for monitoring the MCCH channel of MBS according to any one of claims 3 to 5, characterized in that: In the step S2, the position of each MCCH repetition period mapped to the paging cycle is obtained according to the number of MCCH repetition periods included in each MCCH modification period.

7. The method for monitoring the MCCH channel of MBS according to claim 1, characterized in that: In step S4 and step S5, if the 5G terminal fails to monitor a valid paging indication message at the timing of all paging indication messages within the paging cycle, or the 5G terminal fails to receive a correct MBS broadcast configuration message in all MCCH sending windows within the paging cycle, the 5G terminal schedules to receive the MBS broadcast configuration message in each subsequent MCCH sending window.

8. A device for monitoring the MCCH channel of MBS, characterized in that: It includes a newly added indication unit, a cycle mapping unit, a DRX status monitoring unit, a first processing unit, and a second processing unit; The newly added indication unit is used to add "MBS broadcast service indication" and "MBS new configuration indication" to the paging indication message sent by the network side to the mobile terminal; the value of the MBS broadcast service indication is set to 1 to indicate that the current cell has an ongoing MBS broadcast service or the current cell has an MBS broadcast service to be carried out; it is set to 0 to indicate that the current cell has no ongoing MBS broadcast service and the current cell has no MBS broadcast service to be carried out; The value of the MBS new configuration indication is set to 1 to indicate that the network side has a new MBS broadcast configuration message to send in the subsequent paging cycle; and is set to 0 to indicate that the network side has no new MBS broadcast configuration message to send in the subsequent paging cycle; The period mapping unit is used to calculate the position of the boundary of the MCCH modification period mapped to the paging period and the position of the MCCH repetition period mapped to the paging period according to the parameters of the MCCH transmission window, MCCH repetition period, and MCCH modification period recorded in SIB20 when the 5G terminal normally resides in a 5G cell A providing MBS services; The DRX state monitoring unit is used for the 5G terminal to receive the MBS user service declaration issued by the 5G cell A, and then the 5G terminal enters the RRC idle state or the RRC inactive state, and monitors the paging indication message with the paging cycle configured by the 5G cell A as a period; if the 5G terminal currently has no valid MBS broadcast configuration information, the first processing unit will continue to process it; if the 5G terminal currently has valid MBS broadcast configuration information, the second processing unit will continue to process it; The first processing unit is used for the 5G terminal to monitor the paging indication message at the timing of each paging indication message within the paging cycle; if the 5G terminal monitors a valid paging indication message at the timing of a certain paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal does not need to schedule the reception of the MBS broadcast configuration message on the MCCH channel within the current paging cycle, and returns to the first processing unit for further processing; if the 5G terminal monitors a valid paging indication message at the timing of a certain paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 1, the 5G terminal schedules the reception of the MBS broadcast configuration message on the MCCH channel in the nearest MCCH sending window after the paging indication message, and after the 5G terminal receives the valid MBS broadcast configuration message, the second processing unit continues to process it subsequently; The second processing unit is used to monitor the paging indication message at the timing of each paging indication message within the paging cycle by the 5G terminal; if the 5G terminal monitors a valid paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS broadcast service indication in the paging indication message is 0, the 5G terminal stops receiving the current MBS broadcast service, and the first processing unit continues to process it subsequently; if the 5G terminal monitors the value of the MBS broadcast service indication in the paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 0, the 5G terminal has no need to receive the MBS broadcast configuration message, and the second processing unit continues to process it subsequently; if the 5G terminal monitors the value of the MBS broadcast service indication in the paging indication message at the timing of a paging indication message within the paging cycle, and the value of the MBS new configuration indication in the paging indication message is 0, the 5G terminal has no need to receive the MBS broadcast configuration message, and the second processing unit continues to process it subsequently; The value of the BS new configuration indication is 1, and the 5G terminal determines whether the boundary of the MCCH modification cycle is mapped in the previous paging cycle; if the boundary of the MCCH modification cycle is mapped in the previous paging cycle, the 5G terminal selects the MCCH sending window opportunity closest to the paging indication message to listen to and receive the MBS broadcast configuration message on the MCCH channel, otherwise the 5G terminal receives the MBS broadcast configuration message at the MCCH sending window position closest to the next MCCH modification cycle boundary; after the 5G terminal receives the valid MBS broadcast configuration message newly configured on the network side, it modifies the local configuration according to the latest received MBS broadcast configuration message, and starts to receive the new MBS service; if the new MBS broadcast configuration message indicates that all MBS broadcast services are stopped, the first processing unit will continue to process it; if the new MBS broadcast configuration message does not indicate that all MBS broadcast services are stopped, the second processing unit will continue to process it.

9. The device for monitoring the MCCH channel of MBS according to claim 8, characterized in that: The value of the MBS new configuration indication is set to 1 to indicate that the network side sent a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent; and is set to 0 to indicate that the network side did not send a new MBS broadcast configuration message between the last time the network side sent the paging indication message and the current time the paging indication message is sent.

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