CN114374937B - Service change notification method, terminal and network side equipment - Google Patents

Abstract

The application discloses a service change notification method, a terminal and network side equipment, and belongs to the technical field of wireless communication. The service change notification method comprises the following steps: when notifying the service change of a target multicast broadcast service MBS, the network side equipment simultaneously sends a service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs.

Description

Service change notification method, terminal and network side equipment

Technical Field

The application belongs to the technical field of wireless communication, and particularly relates to a service change notification method, a terminal and network side equipment.

Background

In the related art, during transmission of a multicast broadcast service (Multicast Broadcast Service, MBS), when notifying service change, for example, notifying session (session) start, session suspension, session recovery or session end of the MBS, a core network device notifies a base station, and the base station pages each terminal having the TMGI according to a temporary mobile group identifier (Temporary Mobile Group Identity, TMGI) corresponding to the MBS, so as to notify each terminal of service change.

In the related art, the paging implementation mode is to calculate paging time according to the identity of the terminal and the paging cycle, and there is different paging time for each terminal, and the terminal monitors the paging channel at this time and receives the service change notification sent by the network side device.

In the related art, for the terminal of the same TMGI, the network side device needs to page each terminal separately, the same MBS service, and the network side device needs to initiate multiple paging, so that the power consumption of the network side device is higher, and the occupied network resources are more.

Disclosure of Invention

The embodiment of the application provides a service change notification method, a terminal and network side equipment, which can solve the problems of higher power consumption of the network side equipment and more network resource occupation in the related technology.

In a first aspect, a service change notification method is provided, including: when notifying the service change of a target multicast broadcast service MBS, the network side equipment simultaneously sends a service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs.

In a second aspect, a service change notification apparatus is provided, including: a first determining module, configured to determine a service change that needs to be notified to a target multicast broadcast service MBS; and the notification module is used for simultaneously sending a service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs.

In a third aspect, a service change notification method is provided, including: and the terminal receives the service change notification message which is simultaneously sent by the network side equipment to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs.

In a fourth aspect, a service change notification apparatus is provided, including: a second determining module, configured to determine an MBS packet to which a target MBS of the terminal belongs; and the receiving module is used for receiving the service change notification message which is simultaneously sent by the network side equipment to a group of terminals corresponding to the MBS packet.

In a fifth aspect, there is provided a terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the third aspect.

In a sixth aspect, a network side device is provided, the network side device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions implementing the steps of the method according to the first aspect when executed by the processor.

In a seventh aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect.

In an eighth aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a terminal program or instructions, implementing a method as described in the third aspect, the processor being for running a network side device program or instructions, or implementing a method as described in the first aspect.

In a ninth aspect, there is provided a computer program product comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the first aspect or implementing the steps of the method according to the third aspect.

In the embodiment of the application, when notifying the service change of the target MBS, the network side equipment simultaneously sends the service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs. Because the MBS grouping is used for informing instead of the identification of a single terminal, the network resource can be saved, and the power consumption of network side equipment can be reduced.

Drawings

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable;

Fig. 2 is a schematic flow chart of a service change notification method according to an embodiment of the present application;

Fig. 3 is a schematic flow chart of another service change notification method according to an embodiment of the present application;

fig. 4 is a schematic flow chart of a service change notification method according to an embodiment of the present application;

Fig. 5 is a schematic flow chart of a service change notification method according to an embodiment of the present application;

fig. 6 is a schematic flow chart of a service change notification method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a service change notification apparatus according to an embodiment of the present application;

Fig. 8 is a schematic diagram of another structure of a service change notification apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 10 shows a schematic hardware structure of a terminal according to an embodiment of the present application;

Fig. 11 shows a schematic hardware structure of a network side device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate, such that embodiments of the application may be practiced otherwise than as specifically illustrated and described herein, and that the "first" and "second" distinguishing between objects generally being of the same type, and not necessarily limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for exemplary purposes and NR terminology is used in much of the following description, but these techniques may also be applied to applications other than NR system applications, such as 6 th Generation (6G) communication systems.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a terminal device or a User Equipment (UE), and the terminal 11 may be a terminal-side device such as a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a palm Computer, a netbook, an ultra-Mobile Personal Computer (ultra-Mobile Personal Computer, UMPC), a Mobile internet device (Mobile INTERNET DEVICE, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), and the wearable device includes: a bracelet, earphone, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network, where the base station may be called a node B, an evolved node B, an access Point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a Basic service set (Basic SERVICE SET, BSS), an Extended service set (Extended SERVICE SET, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access Point, a WiFi node, a transmission and reception Point (TRANSMITTING RECEIVING Point, TRP), or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that, in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

The service change notification method provided by the embodiment of the application is described in detail below through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

Fig. 2 is a schematic flow chart of a service change notification method in an embodiment of the present application, where the method 200 may be performed by a network side device. In other words, the method may be performed by software or hardware installed on the network-side device. As shown in fig. 2, the method may include the following steps.

S210, when notifying the service change of the target MBS, the network side equipment simultaneously sends a service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs.

Since the service types of a group of UEs with the same multicast broadcast service are the same, a single UE notification is not required when notifying a service change, and thus, in the embodiment of the present application, a group of UEs with the same service are simultaneously notified in a packet manner.

In one possible implementation, the terminals may be grouped according to MBS services, e.g., the terminals may be grouped according to at least one of: a session Identification (ID) of the MBS, a session index (index) of the MBS, a service (service) ID of the MBS, a group (group) ID of the MBS, a quality of service (Quality of Service, qoS) flow ID, TMGI, TMGI packet ID, a global system for mobile communications (Global System for Mobile Communications, GMS) radio network temporary identity (Radio Network Temporary Identifier, RNTI) of the MBS (i.e., MBS service RNTI), an IP address (addr) of the MBS.

The group (group) ID of the MBS is used to identify a group of MBS sessions, for example, the network side device may combine different session IDs into a group, so that the group of MBS sessions may be uniformly notified and managed. In a specific application, MBS sessions may be grouped based on Qos, or MBS sessions may be grouped based on a time when the MBS session starts, for example, a plurality of MBS sessions with start times close (e.g., time differences within a given threshold) are taken as one MBS session group.

In addition, the network side device may group UEs of the same TMGI into one or more TMGI groups. For example, the grouping may be performed according to measurement reporting results, UE access class, or MBS service of interest to the UE reporting.

Thus, in one possible implementation manner, the parameters of at least one of the group of terminals are the same or have an association relationship, that is, the network side device may divide UEs with the same or having an association relationship with the parameters of at least one of the following or a combination thereof into a group of terminals:

(1) Session identification (MBS session ID) of MBS; for example, terminals having the same MBS session ID are a group;

(2) Session index (MBS session index) of MBS; for example, terminals having the same MBS session index are a group;

(3) Service identification of MBS (MBS SERVICE ID);

(4) Session group identification (MBS session group ID) of MBS;

(5) QoS flow identification (QoS flow ID);

(6)TMGI；

(7) TMGI packet identification;

(8) A GMS radio network temporary identifier G-RNTI;

(8) An internet protocol IP address (MBS IP addr) of the MBS.

In a possible implementation manner of the embodiment of the present application, the service change notification message may include at least one of the following or a combination thereof:

(1) Identification information of the target MBS; for example, at least one of the following for the target MBS: (1) Session identification (MBS session ID), session index (MBS session index), service identification (MBS SERVICE ID), session group identification (MBS session group ID), qoS flow identification (QoS flow ID), TMGI packet identification, G-RNTI, MBS IP addr, etc.

(2) The service type notified by the service change notification message; for example, a session start of the target MBS, a session suspension of the target MBS, a session restoration of the target MBS, or a session stop of the target MBS.

(3) And the MBS notification change instruction is used for indicating whether the content of the service change notification message is the same as the content of the service change notification message which is sent last time. That is, the indication is used to indicate whether the content of the service change notification message is the same as the content of the service change notification message sent to the terminal last time, if so, the terminal does not need to parse the subsequent message content again, so as to save the processing flow of the terminal.

In the embodiment of the present application, the network side device sends the service change notification message to the group of terminals, which includes but is not limited to the following two implementation manners:

and (one) the network side equipment sends a service change notification message to the group of terminals through the downlink common control channel.

And (II) the network side equipment sends a service change notification message to the group of terminals through a paging channel.

These two implementations are described separately below.

Notification via downlink common control channel

In one possible implementation manner, the network side device may send first downlink control information (Downlink Control Information, DCI) through the downlink common control channel (e.g., PDCCH), where the first DCI carries a service change notification message, and the first DCI is scrambled by a first RNTI, where the first RNTI corresponds to the target MBS.

In the above possible implementation manner, a DCI format scrambled by a special value RNTI (i.e., a first RNTI) may be defined, where the content is a certain bit number, and MBS service change indication is notified. Such as M-RNTI scrambled DCI formats 1-0.

In this possible implementation, optionally, the MBS notification change indication (MBS modification indicator) in the service change notification message may be indicated with 1bit or multiple bits.

In another possible implementation, the notification may also be performed by means of a short message. Thus, in this possible implementation manner, the sending, by the network side device, the service change notification message to the group of terminals through the downlink common control channel may include: and sending a short message through the downlink common control channel, wherein the short message carries a service change notification message, and the short message is scrambled through a second RNTI.

In this possible implementation, the second RNTI may be a paging RNTI (PAGING RNTI, P-RNTI), i.e. the short message is scrambled by the P-RNTI of the terminal.

In the above possible implementation manner, optionally, a 1bit indication may be added to the short message to indicate the MBS notification change indication (MBS modification indicator) in the service change notification message.

In the foregoing possible implementation manner, optionally, the network side device may further send a second DCI, where the second DCI is used to notify that the short message arrives, and the second DCI uses the second RNTI to scramble. Therefore, the short message can be prevented from being missed by the terminal.

In the foregoing possible implementation manner, the information carried in the short message may further include at least one of the following:

(1) System information change instruction information;

(2) Indication information of earthquake and tsunami warning systems (Earthquake and Tsunami WARNINGSYSTEM, ETWS);

(3) Indication information of the commercial mobile alert service (Commercial Mobile ALERT SYSTEM, CMAS);

(4) Indication information indicating to stop paging listening.

In this possible implementation manner, optionally, in order to facilitate terminal inspection, the network side device may subscribe to configure, for the terminal, a search space and a resource set for downlink common control channel reception of the MBS service. When sending a service change notification message to the group of terminals through a downlink common control channel, the network side device sends the downlink common control channel on a group of specific resource sets and/or search spaces corresponding to the terminals, wherein the specific resource sets and/or search spaces are resource sets and/or search spaces which are configured by the network side device for the terminals and are special for MBS paging.

For example, the network side device may define a search space for PDCCH reception for MBS notification as: type4-PDCCH common search space set (Type 4-PDCCH common SEARCH SPACE SET).

Wherein the control resource set (Control resource set, CORESET) can solve the existing range problem of the PDCCH, such as the time domain length and the frequency domain range. The NR employs a configurable CORESET, CORESET time domain length and frequency domain range that can be configured by system information or dedicated RRC messages. However, the configuration of CORESET does not indicate a specific time domain position (only the time domain duration (number of symbols) is given), and the specific time domain position is indicated by the Monitoring Opportunity (MO) given by SEARCH SPACE. For a certain CORESET, NR may configure different SEARCH SPACE for different UEs, that is, different blind detection modes (such as a monitoring period, a monitored symbol start position, etc.) for different UEs. Thus, the blind detection complexity of the UE can be further reduced.

Thus, in one possible implementation of the embodiment of the present application, a resource set mbsControlResourceSet and/or a search space mbsPagingSearchSpace (type 4) for MBS service reception may be defined, and paging for MBS performs PDCCH reception in a specific resource set or search space. So as to reduce the blind detection complexity of the terminal. The network side equipment sends a service change notification message to a group of terminals through a downlink common control channel, and the service change notification message is sent on the specific resource set and/or the search space of the group of terminals.

(II) notification over paging channel

In one possible implementation manner, the network side device sends a service change notification message to the group of terminals at a first paging location, where the first paging location is used for paging multiple services of the terminals, the service change notification message is scrambled by a first RNTI, and the first RNTI corresponds to the target MBS. For example, the first RNTI may be a newly defined RNTI, e.g., an M-RNTI.

In the above possible implementation manner, the first paging location is a paging location of a general page of a terminal, and the service change notification message is scrambled by the first RNTI, so that only a specific terminal (for example, the group of terminals) can descramble the service change notification message.

In another possible implementation manner, the network side device sends a service change notification message to the group of terminals at a second paging location, where the second paging location is dedicated to paging of the target MBS of the terminal.

In the above possible implementation manner, optionally, the second paging location may be determined according to a specific resource set and/or search space configured by the network side device for a group of the terminals, where the specific resource set and/or search space is a resource set and/or search space dedicated to MBS paging. As described above, the network side device may allocate a resource set and/or a search space dedicated to MBS paging for the terminal, so that a paging message of the MBS, for example, the service change notification message, may be sent on the dedicated resource set and/or the search space.

In the above possible implementation manners, the network side device may also configure the terminal with a paging cycle T dedicated to MBS, FIRSTPDCCH-MonitoringOccasionOfPO for MBS paging monitoring, and so on.

Or the second paging location may also be determined according to target parameters, where the target parameters include: the paging cycle of the target MBS, the number of paging frames included in one paging cycle, and the identification of the target MBS.

For example, the location PO (Paging Occasion) and paging frame (PAGING FRAME, PF) where paging may occur may be determined first. The PF is a system frame where POs are located, and one PF contains one or more POs. If the paging cycle of the target MBS is T, the paging frames PF existing in one paging cycle are N, the identification information of the target MBS is mbs_service_id, pf_offset is the offset of the PF position, ns is the number of POs in one PF, and the paging frames PF and paging opportunities PO corresponding to the second paging position satisfy the following formula:

(SFN+PF_offset)mod T＝(T div N)*(MBS_SERVICE_ID mod N)；

i_s＝floor(MBS_SERVICE_ID/N)mod Ns

Wherein:

T div N means that N PFs are evenly distributed into T subframes with T as a period.

Taking the N-modulo for MBS_SERVICE_ID. The UEs of different mbs_service_ids can be uniformly arranged in the N PFs.

(SFN+PF_offset) mod T is a modulo taking T for the SFN. The practical effect is to evenly distribute frames of different SFN numbers into T subgroups

Through this possible implementation, UEs of different mbs_service_ids are uniformly distributed among N PFs, and the N PFs are also uniformly distributed within T.

Where i_s can also be understood as the position number of the terminal's PO on the PF (representing the i_s th PO in the PF). It will be appreciated that there may also be different indices on a frame, each index corresponding to a beam, with i_s representing the page on the beam in the direction corresponding to that index. From a practical point of view i_s is equal to SSB index. That is, in order to achieve the directionality of the paging message monitoring, reference may be made to the SSB transmission mechanism, and the Beam direction of PAGING PDCCH monitored by the UE coincides with the direction of its Best Beam (Best Beam) selected.

The search space (SEARCH SPACE) in NR is not a fixed time domain position in each frame, i.e. the period is not in frames but in slots, so the PDCCH listening occasion (monitoring occasions) needs to be determined by SEARCH SPACE described above, and since each PO has to correspond to all SSBs, each PO has S PDCCH monitoring occasions, each PDCCH monitoring occasion corresponds to one SSB, and S is the number of SSBs actually transmitted in one SSB set period.

Thus, after PDCCH monitoring occasion and PF, POs are determined, PDCCH monitoring occasions may also be associated with each PO to determine PDCCH monitoring occasions for paging for a certain UE.

In the above possible implementation manner, the identification information of the target MBS may include at least one of the following:

(1) Session identification (MBS session ID) of the target MBS; for example, terminals having the same MBS session ID are a group;

(2) Session index (MBS session index) of the target MBS; for example, terminals having the same MBS session index are a group;

(3) Service identification (MBS SERVICE ID) of the target MBS;

(4) Session group identification (MBS session group ID) of the target MBS;

(5) QoS flow identification (QoS flow ID);

(6)TMGI；

(7) TMGI packet identification;

(8)G-RNTI；

(8) IP addr of the target MBS.

In the above possible implementation manner, optionally, the paging cycle of the target MBS expires by one of the following:

Paging cycles of different MBS are different;

paging cycles of service sessions of different MBS are different;

Paging cycles of services of different MBS are different;

Paging cycles of session groups of different MBS are different;

Paging cycles of TMGI packets are different for different MBS.

That is, the paging cycle of the MBS may be the same as that of the common PAGING CYCLE, or may be different according to MBS services, for example, different MBS PAGING CYCLE may be allocated for each session, each service, or each session group or TMGI group.

For example MbsPagingCycle = ENUMERATED { rf32, rf64, rf128, rf256, rf512, rf1024}.

Optionally, when the network side device configures the MBS session to start, the session start time may be maximally close to the second paging location, so as to achieve the purpose of power saving. Or in case of configuring a discontinuous reception (Discontinuous Reception, DRX) cycle of the MBS, the network side device may also configure the second paging cycle within an active period (active) of the discontinuous reception DRX cycle of the target MBS.

In each possible implementation manner, the first RNTI may be determined according to the identification information of the target MBS. As described above, the identification information of the target MBS may include parameters of at least one of:

(1) Session identification (MBS session ID) of the target MBS;

(2) Session index (MBS session index) of the target MBS;

(3) Service identification (MBS SERVICE ID) of the target MBS;

(4) Session group identification (MBS session group ID) of the target MBS;

(5) QoS flow identification (QoS flow ID);

(6)TMGI；

(7) TMGI packet identification;

(8)G-RNTI；

(8) IP addr of the target MBS.

In one possible implementation, the determining manner of the first RNTI may include at least one of:

(1) Truncating part of bits from the identification information of the target MBS as the first RNTI; for example, a truncated truncate RNTI of the above parameters may be used.

(2) And selecting the most significant Bit (Most Significant Bit, MSB) or the least significant Bit (LEAST SIGNIFICANT Bit, LSB) from all parameters contained in the identification information of the target MBS to carry out cascading so as to obtain the first RNTI.

For example, if a plurality of session identities are included in the session group of the MBS, the most significant Bit (Most Significant Bit, MSB) or the LSB least significant Bit (LEAST SIGNIFICANT Bit, LSB) may be respectively taken from different session ids and concatenated, thereby obtaining the first RNTI.

(2) Taking all parameters contained in the identification information of the target MBS as parameters, and taking a result obtained by adopting a predetermined algorithm as the first RNTI; such as hash operations, or other algorithm iterations.

(3) Combining each parameter contained in the identification information of the target MBS with a mobile country code (Mobile Country Code, MCC) or a mobile network number (Mobile Network Code, MNC) to obtain the first RNTI;

(4) And taking the RNTI with the mapping relation with the identification information of the target MBS as the first RNTI according to the one-to-one mapping relation between the preset identification information of the MBS and the RNTI.

In one possible implementation, if the service type notified by the service change notification message is session suspension or session stop, sending the service change notification message to the group of terminals may further include the following implementation: a specific media access Control layer (Medium Access Control, MAC) Control Element (CE) is sent to the group of terminals, where the specific MAC CE indicates that a session of the target MBS is suspended or indicates that a session of the target MBS is stopped.

That is, in this possible implementation, the network-side device may define a MAC CE for indicating the stop or suspension of a certain MBS service. For example, the MAC CE may include the following indication fields:

LCID: a logical channel identification for indicating a Multicast transport channel (Multicast TRAFFIC CHANNEL, MTCH);

stop MTCH: indicating MBS service stop of the LCID;

supend MTCH: the MBS service indicating the LCID is suspended.

Or may define a LCID of a special value indicating termination of all MBS services.

In the embodiment of the present application, optionally, the specific content in the service change notification message may be as follows:

{

Session list{

session index session id，

actiontype enum(start，stop，resume，suspend)，

MTCH configuration information. ,// optional

}，

TMGI，

MCCH configuration information. ,// optional

By the method provided by the embodiment of the application, when notifying the service change of the target MBS, the network side equipment simultaneously sends the service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs. Because the MBS grouping is used for informing instead of the identification of a single terminal, the network resource can be saved, and the power consumption of network side equipment can be reduced.

Fig. 3 shows another flow diagram of a service change notification method in an embodiment of the application, which method 300 may be performed by a terminal. In other words, the method may be performed by software or hardware installed at the terminal. As shown in fig. 3, the method may include the following steps.

S310, the terminal receives the service change notification message sent by the network side equipment to the terminal of the MBS packet according to the MBS packet to which the target MBS belongs.

In the embodiment of the application, the terminal can determine the time-frequency position for receiving the service change notification message according to the MBS packet to which the target MBS belongs, for example, the identification information of the target MBS.

The method 300 in the embodiment of the present application corresponds to the method 200 and has possible implementation manners corresponding to the method 200, and in this embodiment, the main implementation manners involved in the method 300 are mainly described, and other details may refer to related descriptions in the method 200 and are not described herein.

In one possible implementation manner, the service change notification message includes at least one of the following:

(1) Identification information of the target MBS;

(2) The service type notified by the service change notification message;

(3) And the MBS notification change instruction is used for indicating whether the content of the service change notification message is the same as the content of the service change notification message which is sent last time.

Wherein, as described in the method 200, the identification information of the target MBS may include parameters of at least one of the following:

(1) Session identification (MBS session ID) of the target MBS;

(2) Session index (MBS session index) of the target MBS;

(3) Service identification (MBS SERVICE ID) of the target MBS;

(4) Session group identification (MBS session group ID) of the target MBS;

(5) QoS flow identification (QoS flow ID);

(6)TMGI；

(7) TMGI packet identification;

(8)G-RNTI；

(8) IP addr of the target MBS.

In one possible implementation manner, if the MBS notification change indication is carried in the service change notification message, the method further includes: and determining whether the information contained in the service change notification message is the same as the service change notification message received last time according to the MBS notification change indication in the service change notification message, and if so, continuing to analyze the service change notification message.

For example, a terminal needs to monitor continuously for a period of time before the session of the target MBS starts, so that by including the MBS notification change indication in the service change notification message, the terminal can learn whether the currently received service change notification message changes relative to the last received service change notification message, thereby determining whether to continue to analyze the currently received service change notification message, so as to reduce the time consumed by the terminal to repeatedly analyze the service change notification message, and save the resources of the terminal.

For example, an identifier indicator bit valueTag may be added to the service change notification message to indicate whether the message content for MBS service notification is changed, and when the content is not changed, the UE does not continue to parse the notification message. Wherein, this valueTag can take the form of a flip (0, 1, … …) or a count+1. The specific embodiment is not limited.

Corresponding to the method 200, the service change notification message that the terminal receiving network side device sends to a group of terminals corresponding to the MBS packet simultaneously includes, but is not limited to, the following two possible implementations:

receiving the service change notification message sent through a downlink common control channel;

and (II) receiving the service change notification message transmitted through a paging channel.

For the above implementation manner (one), optionally, the terminal may monitor the downlink common control channel using a first RNTI and a second RNTI, and obtain a first DCI through the first RNTI, where the first DCI carries the service change notification message, and the first RNTI corresponds to the target MBS. That is, in this possible implementation manner, the service change notification message is scrambled by the first RNTI, so that it can be known that the terminal of the first RNTI can receive the first DCI, thereby implementing that the service change notification message is simultaneously sent to a group of terminals.

The first RNTI is the same as in the method 200, and specific reference may be made to the description in the method 200.

Or in another possible implementation manner, a short message sent through the downlink common control channel is received, and the short message is descrambled by using a second RNTI, wherein the short message carries a service change notification message. That is, in this possible implementation, the service change notification message is sent via a short message, see in particular the description related to method 200.

Optionally, the method may further include: and receiving second DCI, wherein the second DCI is used for notifying the short message to arrive, and the second DCI uses the second RNTI to scramble. I.e. the network side equipment informs the UE of the arrival of the short message through the second DCI.

Optionally, the information carried in the short message may further include at least one of the following:

(1) System information change instruction information;

(2) Indication information of ETWS;

(3) Indication information of the CMAS;

(4) Indication information indicating to stop paging listening.

In an implementation manner one, a terminal may detect, in a resource set and/or a search space configured by the network side device for the terminal and dedicated to MBS paging, the service change notification message sent by the network side device. That is, the network side device may configure a resource set and/or a search space dedicated for MBS paging for the terminal in advance, and send the downlink common control channel on the corresponding resource set and/or search space. See in particular the description associated with method 200.

For implementation two, optionally, a first RNTI and a second RNTI are used to monitor at a first paging location, and the service change notification message is obtained through the first RNTI, where the first paging location is used for paging multiple services of the terminal, the first RNTI corresponds to the target MBS, and the second RNTI corresponds to services other than the target MBS in the multiple services. That is, in a possible implementation manner, the network side device sends the service notification message through the normal paging location, and the terminal listens to the special RNTI (i.e., the first RNTI), but since there may be a normal paging message in the normal paging location, the UE needs to simultaneously perform both kinds of monitoring of RNTI and perform dual RNTI verification. For example, on PDCCH: and monitoring the P-RNTI to acquire the common paging information. And monitoring the M-RNTI to acquire the notification information of the MBS.

Or alternatively, the terminal may also receive the service change notification message at a second paging location, where the second paging location is dedicated to paging of the target MBS of the terminal.

In the foregoing possible implementation manner, optionally, before the second paging location receives the service change notification message, the method further includes one of:

(1) Determining the second paging position according to a specific resource set and/or search space configured by network side equipment for the terminal, wherein the specific resource set and/or search space is a resource set and/or search space special for MBS paging; i.e. the terminal blindly checks the service change notification message in the resource set and/or search space dedicated for MBS paging. Specific implementations may be found in the description of method 200.

(2) Determining the second paging position according to a target parameter, wherein the target parameter comprises: the paging cycle of the target MBS, the number of paging frames included in one paging cycle, and the identification of the target MBS. I.e. the terminal determines the second paging location based on the target parameter. The specific manner of determination may be found in the description of method 200.

As described in method 200, in the embodiment of the present application, the service type notified by the service change notification message includes one of the following:

(1) The session of the target MBS starts;

(2) Session suspension of the target MBS;

(3) Session recovery of the target MBS;

(4) The session of the target MBS is stopped.

Optionally, if the service type notified by the service change notification message is session suspension of the target MBS or session stop of the target MBS, the terminal may receive the service change notification message in the following implementation manner (three) in addition to the above possible implementation manners (one) and (two):

And receiving a specific MAC CE sent by the network side equipment, wherein the specific MAC CE indicates the session suspension of the target MBS or indicates the session stop of the target MBS. The specific implementation manner of the specific MAC CE may be referred to the related description in the method 200, which is not described herein.

In one possible implementation manner, after receiving a service change notification message sent by a network side device to a terminal of the MBS packet, the method further includes: the terminal obtains the service resource of the target MBS through at least one of the following or the combination thereof:

(1) Acquiring through a system message;

(2) Acquiring through paging information;

(3) Acquiring through RRC signaling;

(4) Acquiring a multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS) control channel (MBMS Control Channel, MCCH) through a multicast common control channel;

(5) The MBMS transport channel (MBMS TRAFFIC CHANNEL, MTCH) is acquired through the multicast transport channel.

Wherein, the service resources of the target MBS can comprise at least one of the following:

(1) MCCH configuration information

(2) Configuration information of MBS transmission channel MTCH

(3) Qos configuration (profile);

(4) An MBS service IP address;

(5) Logical channel mapping relation;

(6) Routing Bridge (RB) configuration.

In addition, the service resource information of the target MBS may further include:

(7)TMGI；

(8) Service type: session start, session resume, session suspend, session stop;

(9) Session id, session idx, session group, TMGI group, SERVICE ID, etc., so that the terminal can recognize the target MBS.

In one possible implementation manner, after receiving a service change notification message sent by a network side device to a terminal of the MBS packet, the method further includes:

if the service type notified by the service change notification message is the session start of the target MBS, the terminal acquires the service resource of the target MBS, maps the logic information of the target MBS, establishes a multicast management routing bridge (MANAGEMENT ROUTING BRIDGE, MRB), enters the activation state of the target MBS, and starts the service reception of the MBS;

If the service type notified by the service change notification message is the session stop of the target MBS, the terminal ends the service receiving of the target MBS, deactivates the target MBS and releases the service resource of the target MBS;

If the service type notified by the service change notification message is that the session of the target MBS is suspended, the terminal performs one of the following: reserving the MTCH of the target MBS, suspending the target MBS service, and keeping the activation state of the target MBS; reserving MCCH of the target MBS, not reserving MTCH of the target MBS service, and entering a deactivation state of the target MBS; deactivating the target MBS and releasing service resources of the target MBS;

If the service type notified by the service change notification message is session recovery of the target MBS, the terminal performs one of the following: and activating the target MBS, if the service resources of the target MBS are released, acquiring the service resources of the target MBS, and recovering the service reception of the target MBS.

The following describes a service change notification method provided by the embodiment of the present application by taking a specific service type as an example.

Example 1

Fig. 4 is a schematic flowchart of a service change notification method according to an embodiment of the present application, where the method 400 may be performed by a network side device and a terminal. In other words, the method may be performed by software or hardware installed in the network-side device and the terminal. As shown in fig. 4, the method may include the following steps.

S401, UE applies MBS service registration, acquires registration identification information (namely MBS identification information), and in the embodiment, the registration identification information is TMGI.

S402, the network side equipment informs the UE of session start (session start) in a paging mode.

Where Paging employs a special search space and/or employs a special location PO calculation method, as described in method 200, paging location PO satisfies:

(SFN+PF_offset)mod T＝(T div N)*(TMGI mod N)

i_s＝floor(TMGI/N)mod Ns

s403, the UE receives the paging message at the special PO position, and the message content is MBS session start.

S404, the UE receives the session start to acquire resource (the acquisition mode is 3), maps a logic channel, establishes MRB, enters into MBS ACTIVE state, and starts MBS service reception.

Example two

Fig. 5 is a schematic flow chart of a service change notification method according to an embodiment of the present application, where the method 500 may be performed by a network side device and a terminal. In other words, the method may be performed by software or hardware installed in the network-side device and the terminal. As shown in fig. 5, the method may include the following steps.

S501, the UE applies for MBS service registration and acquires IP addr.

S502, the network side equipment notifies UE session suspend. Using the special location PO calculation method, as described in method 200, the PO satisfies:

(SFN+PF_offset)mod T＝(T div N)*(IP addr mod N)

i_s＝floor(IP addr/N)mod Ns

S503, the UE receives the paging message at the special position PO. The message content is MBS session suspend.

And S504, the UE releases the MCCH and the MTCH resources.

S505, the UE receives the paging message at the special position PO. The message content is MBS session resume.

S506, the UE starts to monitor the MCCH, acquires the MTCH configuration information, reacquires MBS resources, establishes MRB and maps a logical channel.

S507, the UE resumes receiving MBS service.

Example III

Fig. 6 is a schematic flowchart of a service change notification method according to an embodiment of the present application, where the method 600 may be performed by a terminal. In other words, the method may be performed by software or hardware installed at the terminal. As shown in fig. 6, the method may include the following steps.

S601, the UE monitors the PDCCH to acquire the P-RNTI scrambled short message.

Wherein, one bit is added in the short message content to indicate MBS service change.

And S602, after receiving the service change instruction, the UE receives the paging or directly receives the MCCH without receiving the paging.

S603, the UE starts MBS service receiving through the MTCH configuration information configured by the MCCH.

Example IV

In this embodiment, the network side device notifies the MBS service change using DCI.

In this embodiment, the service change notification method may include the steps of:

1. The network side device informs MCCH CHANGE the notification through the M-RNTI scrambled DCI. M-RNTI format 1C has an RNTI value of FFFA.

2. After receiving the notification, the UE receives the MCCH.

3. And according to the MTCH configured by the MCCH, the terminal starts MBS service receiving.

It should be noted that, in the service change notification method provided in the embodiment of the present application, the execution body may be a service change notification device, or a control module in the service change notification device for executing the service change notification method. In the embodiment of the present application, a method for executing service change notification by a service change notification apparatus is taken as an example, and the service change notification apparatus provided in the embodiment of the present application is described.

Fig. 7 is a schematic structural diagram of a service change notification apparatus according to an embodiment of the present application, and as shown in fig. 7, the apparatus 700 mainly includes: a first determining module 701, configured to determine a service change that needs to be notified of a target multicast broadcast service MBS; and a notification module 702, configured to send a service change notification message to a group of terminals corresponding to the MBS packet at the same time according to the MBS packet to which the target MBS belongs.

In an alternative implementation, the notification module 702 sends the service change notification message to a group of terminals corresponding to the MBS packet by one of:

sending a service change notification message to the group of terminals through a downlink common control channel;

And sending a service change notification message to the group of terminals through a paging channel.

In an alternative implementation, the notification module 702 sends a service change notification message to the group of terminals through a downlink common control channel, including one of the following:

transmitting first Downlink Control Information (DCI) through the downlink common control channel, wherein the first DCI carries a service change notification message, and the first DCI is scrambled through a first RNTI, and the first RNTI corresponds to the target MBS;

And sending a short message through the downlink common control channel, wherein the short message carries a service change notification message, and the short message is scrambled through a second RNTI.

In an alternative implementation, the notification module 702 sends a service change notification message to the group of terminals through a downlink common control channel, including:

and transmitting the downlink common control channel on a group of specific resource sets and/or search spaces corresponding to the terminals, wherein the specific resource sets and/or search spaces are resource sets and/or search spaces which are configured by the network side equipment for the terminals and are special for MBS paging.

In an alternative implementation, the notification module 702 performs service change notification on the group of terminals through a paging channel, including one of the following:

Sending a service change notification message to the group of terminals at a first paging position, wherein the first paging position is used for paging multiple services of the terminals, the service change notification message is scrambled through a first RNTI, and the first RNTI corresponds to the target MBS;

and sending a service change notification message to the group of terminals at a second paging position, wherein the second paging position is special for paging of the target MBS of the terminals.

In an alternative implementation, the second paging location is determined by at least one of:

Determining a specific resource set and/or search space configured for a group of terminals according to network side equipment, wherein the specific resource set and/or search space is a resource set and/or search space special for MBS paging;

Determining the second paging position according to a target parameter, wherein the target parameter comprises: the paging cycle of the target MBS, the paging frame number included in one paging cycle, and the identification information of the target MBS.

In an alternative implementation, the notification module 702 sends a service change notification message to a group of terminals of the target MBS, including:

And if the service change notification message notifies the session suspension of the target MBS or the session stop of the target MBS, sending a specific MAC CE to the group of terminals, wherein the specific MAC CE indicates the session suspension of the target MBS or the session stop of the target MBS.

The service change notification apparatus provided by the embodiment of the present application can implement each process implemented by the network side device in the method embodiments of fig. 2 to fig. 6, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

Fig. 8 is a schematic structural diagram of another service change notification apparatus according to an embodiment of the present application, and as shown in fig. 8, the apparatus 800 may include: a second determining module 801, configured to determine MBS packets to which a target MBS of the terminal belongs; a receiving module 802, configured to receive a service change notification message sent by a network side device to a group of terminals corresponding to the MBS packet at the same time.

In an alternative implementation manner, the second determining module 801 is further configured to determine, according to the MBS notification change indication in the service change notification message, whether information included in the service change notification message is the same as a service change notification message received last time, and if not, continue to parse the service change notification message.

In an alternative implementation manner, the receiving module 802 receives a service change notification message sent by a network side device to a group of terminals corresponding to the MBS packet at the same time, where the service change notification message includes one of the following:

receiving the service change notification message sent by a downlink common control channel;

and receiving the service change notification message sent through a paging channel.

In an optional implementation manner, the receiving module 802 receives a service change notification message sent by the network side device to the group of terminals through a downlink common control channel, where the service change notification message includes one of the following:

monitoring the downlink common control channel by using a first RNTI and a second RNTI respectively, and acquiring a first DCI through the first RNTI, wherein the first DCI carries the service change notification message, and the first RNTI corresponds to the target MBS;

And receiving the short message sent by the downlink common control channel, and descrambling the short message by using a second RNTI, wherein the short message carries a service change notification message.

In an alternative implementation, the receiving module 802 receives the service change notification message sent through a paging channel, including one of:

Monitoring at a first paging position by using a first RNTI and a second RNTI respectively, and acquiring the service change notification message through the first RNTI, wherein the first paging position is used for paging multiple services of the terminal, the first RNTI corresponds to the target MBS, and the second RNTI corresponds to services except the target MBS in the multiple services;

and receiving the service change notification message at a second paging position, wherein the second paging position is special for paging of the target MBS of the terminal.

In an alternative implementation, the second determining module 801 is further configured to at least one of:

Determining the second paging position according to a specific resource set and/or search space configured by network side equipment for the terminal, wherein the specific resource set and/or search space is a resource set and/or search space special for MBS paging;

Determining the second paging position according to a target parameter, wherein the target parameter comprises: the paging cycle of the target MBS, the number of paging frames included in one paging cycle, and the identification of the target MBS.

In an alternative implementation manner, the receiving module 802 is further configured to receive a specific MAC CE sent by a network side device, where the specific MAC CE indicates that a session of the target MBS is suspended or indicates that a session of the target MBS is stopped.

The service change notification device in the embodiment of the application can be a device, and can also be a component, an integrated circuit or a chip in the terminal. The device may be a mobile terminal or a non-mobile terminal. By way of example, mobile terminals may include, but are not limited to, the types of terminals 11 listed above, and non-mobile terminals may be servers, network attached storage (Network Attached Storage, NAS), personal computers (personal computer, PCs), televisions (TVs), teller machines, self-service machines, etc., and embodiments of the present application are not limited in particular.

The service change notification apparatus provided by the embodiment of the present application can implement each process implemented by the terminal in the method embodiments of fig. 2 to fig. 6, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

The service change notification apparatus in the embodiment of the present application may be an apparatus having an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, and the embodiment of the present application is not limited specifically.

Optionally, as shown in fig. 9, the embodiment of the present application further provides a communication device 900, including a processor 901, a memory 902, and a program or an instruction stored in the memory 902 and capable of running on the processor 901, where, for example, the communication device 900 is a terminal, the program or the instruction when executed by the processor 901 implements the respective processes of the service change notification method embodiment described above, and can achieve the same technical effects. When the communication device 900 is a network side device, the program or the instruction, when executed by the processor 901, implements each process implemented by the AMF or the network side device in the above embodiment of the service change notification method, and can achieve the same technical effect, so that repetition is avoided, and no further description is given here. When the communication device 900 is a terminal, the program or the instruction when executed by the processor 901 implements each process implemented by the terminal in the above embodiment of the service change notification method, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Fig. 10 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 1000 includes, but is not limited to: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

Those skilled in the art will appreciate that terminal 1000 can also include a power source (e.g., a battery) for powering the various components, which can be logically connected to processor 1010 by a power management system so as to perform functions such as managing charge, discharge, and power consumption by the power management system. The terminal structure shown in fig. 10 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine some components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 1004 may include a graphics processor (Graphics Processing Unit, GPU) 10041 and a microphone 10042, where the graphics processor 10041 processes image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also referred to as a touch screen. The touch panel 10071 can include two portions, a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from a network side device, the radio frequency unit 1001 processes the downlink data with the processor 1010; in addition, the uplink data is sent to the network side equipment. In general, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1009 may be used to store software programs or instructions and various data. The memory 1009 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 1009 may include a high-speed random access Memory, and may also include a nonvolatile Memory, wherein the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable EPROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.

The processor 1010 may include one or more processing units; alternatively, the processor 1010 may integrate an application processor that primarily processes operating systems, user interfaces, and applications or instructions, etc., with a modem processor that primarily processes wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1010.

Wherein, the processor 1010 is configured to determine an MBS packet to which a target MBS of the terminal belongs.

And the radio frequency unit 1001 is configured to receive a service change notification message sent by the network side device to a group of terminals corresponding to the MBS packet at the same time.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 11, the network device 1100 includes: an antenna 1101, a radio frequency device 1102, and a baseband device 1103. The antenna 1101 is connected to a radio frequency device 1102. In the uplink direction, the radio frequency device 1102 receives information via the antenna 1101, and transmits the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes information to be transmitted, and transmits the processed information to the radio frequency device 1102, and the radio frequency device 1102 processes the received information and transmits the processed information through the antenna 1101.

The above-described band processing apparatus may be located in the baseband apparatus 1103, and the method performed by the network-side device in the above embodiment may be implemented in the baseband apparatus 1103, where the baseband apparatus 1103 includes a processor 1104 and a memory 1105.

The baseband apparatus 1103 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 11, where one chip, for example, a processor 1104, is connected to the memory 1105 to call a program in the memory 1105 to perform the network side device operation shown in the above method embodiment.

The baseband device 1103 may further comprise a network interface 1106 for interacting with the radio frequency device 1102, such as a common public radio interface (common public radio interface, CPRI for short).

Specifically, the network side device of the embodiment of the present invention further includes: instructions or programs stored in the memory 1105 and executable on the processor 1104, the processor 1104 invokes the instructions or programs in the memory 1105 to perform the method performed by the modules shown in fig. 7 and achieve the same technical effects, so repetition is avoided and will not be described here.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above service change notification method embodiment, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here.

The processor may be a processor in the terminal described in the above embodiment, or a processor in the network side device described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or an instruction of a network side device or a terminal, each process of the service change notification method embodiment is realized, the same technical effect can be achieved, and the repetition is avoided, and the description is omitted here.

The embodiment of the application also provides a computer program product, which comprises a processor, a memory and a program or an instruction stored in the memory and capable of running on the processor, wherein the program or the instruction realizes each process of the service change notification method embodiment when being executed by the processor, and can achieve the same technical effect, and the repetition is avoided, so that the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims (38)

1. A service change notification method, comprising:

When notifying the service change of a target multicast broadcast service MBS, network side equipment simultaneously sends a service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs;

Wherein, sending a service change notification message to a group of terminals corresponding to the MBS packet comprises one of the following steps:

The network side equipment sends a service change notification message to the group of terminals through a downlink common control channel;

The network side equipment sends a service change notification message to the group of terminals through a paging channel;

The network side device sends a service change notification message to the group of terminals through a downlink common control channel, and the method comprises the following steps:

The network side equipment sends the downlink common control channel on a group of specific resource sets and/or search spaces corresponding to the terminals, wherein the specific resource sets and/or search spaces are resource sets and/or search spaces which are configured by the network side equipment for the terminals and are special for MBS paging;

the network side device performs service change notification on the group of terminals through a paging channel, and the service change notification comprises one of the following steps:

The network side equipment sends a service change notification message to the group of terminals at a first paging position, wherein the first paging position is used for paging multiple services of the terminals, the service change notification message is scrambled through a first RNTI, and the first RNTI corresponds to the target MBS;

And the network side equipment sends a service change notification message to the group of terminals at a second paging position, wherein the second paging position is special for paging of the target MBS of the terminals.

2. The method of claim 1, wherein parameters of at least one of the group of terminals are the same or have an association:

Session identification of MBS;

session index of MBS;

service identification of MBS;

Session group identification of MBS;

Quality of service QoS flow identification;

temporary mobile group identity TMGI;

TMGI packet identification;

A GMS radio network temporary identifier G-RNTI;

The internet protocol IP address of MBS.

3. The method of claim 1, wherein the service change notification message includes at least one of:

identification information of the target MBS;

the service type notified by the service change notification message;

And the MBS notification change instruction is used for indicating whether the content of the service change notification message is the same as the content of the service change notification message which is sent last time.

4. The method according to claim 1, wherein the network side device sends a service change notification message to the group of terminals through a downlink common control channel, including one of:

The network side equipment sends first Downlink Control Information (DCI) through the downlink common control channel, wherein the first DCI carries a service change notification message, and the first DCI is scrambled through a first RNTI, and the first RNTI corresponds to the target MBS;

and the network side equipment sends a short message through the downlink public control channel, wherein the short message carries a service change notification message, and the short message is scrambled through a second RNTI.

5. The method of claim 4, wherein if the network side device sends a short message through the downlink common control channel, the method further comprises:

And the network side equipment sends second DCI, wherein the second DCI is used for notifying the short message to arrive, and the second DCI uses the second RNTI to scramble.

6. The method of claim 4, wherein the information carried in the short message further comprises at least one of:

system information change instruction information;

indication information of an earthquake and tsunami warning system ETWS;

indication information of a commercial mobile alert service CMAS;

indication information indicating to stop paging listening.

7. The method according to claim 1 or 4, wherein the first RNTI is determined according to identification information of the target MBS, wherein the identification information comprises parameters of at least one of:

session identification of the target MBS;

session index of the target MBS;

service identification of the target MBS;

Session group identification of the target MBS;

a QoS flow identifier of the target MBS;

a temporary mobile group identifier TMGI of the target MBS;

packet identification of the TMGI of the target MBS;

G-RNTI of the target MBS;

the IP address of the target MBS.

8. The method of claim 7, wherein the first RNTI is determined by one of:

truncating part of bits from the identification information of the target MBS as the first RNTI;

selecting the MSB of the most significant bit or the LSB of the least significant bit from all parameters contained in the identification information of the target MBS to carry out cascading so as to obtain the first RNTI;

Taking all parameters contained in the identification information of the target MBS as parameters, and taking a result obtained by adopting a predetermined algorithm as the first RNTI;

Combining all parameters contained in the identification information of the target MBS with a mobile country code MCC or a mobile network number MNC to obtain the first RNTI;

And taking the RNTI with the mapping relation with the identification information of the target MBS as the first RNTI according to the one-to-one mapping relation between the preset identification information of the MBS and the RNTI.

9. The method of claim 1, wherein the second paging location is determined by at least one of:

Determining a specific resource set and/or search space configured for a group of terminals according to network side equipment, wherein the specific resource set and/or search space is a resource set and/or search space special for MBS paging;

Determining the second paging position according to a target parameter, wherein the target parameter comprises: the paging cycle of the target MBS, the paging frame number included in one paging cycle, and the identification information of the target MBS.

10. The method of claim 9, wherein the paging frame PF and paging opportunity PO corresponding to the second paging location satisfy the following formula:

(SFN + PF_offset) mod T = (T div N)*( MBS_SERVICE_ID mod N)；

i_s = floor (MBS_SERVICE_ID /N) mod Ns；

Wherein SFN is a system frame where a PF is located, pf_offset is a position offset of the PF, T is a paging cycle of the target MBS, N is a number of PFs existing in one paging cycle, i_s is an i_s th PO in one PF, mbs_service_id is identification information of the target MBS, i_s is an integer greater than 0 and less than Ns, ns is a number of POs included in one PF, and the identification information includes at least one of the following parameters: session identification of the target MBS; session index of the target MBS; service identification of the target MBS; session group identification of the target MBS; a QoS flow identifier of the target MBS; a temporary mobile group identifier TMGI of the target MBS; packet identification of the TMGI of the target MBS; G-RNTI of the target MBS; the IP address of the target MBS.

11. The method of claim 9, wherein the expiration of the paging cycle of the target MBS is one of:

Paging cycles of different MBS are different;

paging cycles of service sessions of different MBS are different;

Paging cycles of services of different MBS are different;

Paging cycles of session groups of different MBS are different;

Paging cycles of TMGI packets are different for different MBS.

12. The method of claim 1, wherein the second paging location is within an active period of a discontinuous reception, DRX, cycle of the target MBS.

13. The method according to any one of claims 1 to 6, 8 to 12, wherein the service type notified by the service change notification message comprises one of:

The session of the target MBS starts;

session suspension of the target MBS;

Session recovery of the target MBS;

The session of the target MBS is stopped.

14. The method of claim 13, wherein transmitting the service change notification message to the group of terminals of the target MBS if the service change notification message notifies the session suspension of the target MBS or the session stop of the target MBS, comprises:

And transmitting a specific MAC CE to the group of terminals, wherein the specific MAC CE indicates the session suspension of the target MBS or indicates the session stop of the target MBS.

15. A service change notification method, comprising:

the terminal receives service change notification messages sent by network side equipment to a group of terminals corresponding to the MBS packets according to the MBS packets to which the target MBS belongs;

Wherein, receiving the service change notification message sent by the network side equipment to a group of terminals corresponding to the MBS packet at the same time, the service change notification message comprises one of the following:

receiving the service change notification message sent by a downlink common control channel;

receiving the service change notification message sent through a paging channel;

The receiving the service change notification message sent by the network side device to the group of terminals through the downlink common control channel includes:

detecting the service change notification message sent by the network side equipment in a resource set and/or search space which is configured by the network side equipment for the terminal and is special for MBS paging;

wherein receiving the service change notification message sent over a paging channel comprises one of:

Monitoring at a first paging position by using a first RNTI and a second RNTI respectively, and acquiring the service change notification message through the first RNTI, wherein the first paging position is used for paging multiple services of the terminal, the first RNTI corresponds to the target MBS, and the second RNTI corresponds to services except the target MBS in the multiple services;

and receiving the service change notification message at a second paging position, wherein the second paging position is special for paging of the target MBS of the terminal.

16. The method of claim 15, wherein the service change notification message includes at least one of:

identification information of the target MBS;

the service type notified by the service change notification message;

And the MBS notification change instruction is used for indicating whether the content of the service change notification message is the same as the content of the service change notification message which is sent last time.

17. The method of claim 16, wherein after receiving a service change notification message that is simultaneously transmitted by a network side device to a group of terminals corresponding to the MBS packet, the method further comprises:

And determining whether the information contained in the service change notification message is the same as the service change notification message received last time according to the MBS notification change indication in the service change notification message, and if so, continuing to analyze the service change notification message.

18. The method of claim 15, wherein receiving a service change notification message sent by the network side device to the group of terminals through a downlink common control channel comprises one of:

the terminal monitors the downlink common control channel by using a first RNTI and a second RNTI respectively, and acquires first DCI through the first RNTI, wherein the first DCI carries the service change notification message, and the first RNTI corresponds to the target MBS;

And receiving the short message sent by the downlink common control channel, and descrambling the short message by using a second RNTI, wherein the short message carries a service change notification message.

19. The method of claim 18, wherein if the short message is received, the method further comprises:

And receiving second DCI, wherein the second DCI is used for notifying the short message to arrive, and the second DCI uses the second RNTI to scramble.

20. The method of claim 18, wherein the information carried in the short message further comprises at least one of:

system information change instruction information;

indication information of an earthquake and tsunami warning system ETWS;

indication information of a commercial mobile alert service CMAS;

indication information indicating to stop paging listening.

21. The method of claim 20, wherein prior to receiving the service change notification message at the second paging location, the method further comprises at least one of:

Determining the second paging position according to a specific resource set and/or search space configured by network side equipment for the terminal, wherein the specific resource set and/or search space is a resource set and/or search space special for MBS paging;

Determining the second paging position according to a target parameter, wherein the target parameter comprises: the paging cycle of the target MBS, the number of paging frames included in one paging cycle, and the identification of the target MBS.

22. The method according to any one of claims 15 to 21, wherein the service type notified by the service change notification message comprises one of:

The session of the target MBS starts;

session suspension of the target MBS;

Session recovery of the target MBS;

The session of the target MBS is stopped.

23. The method of claim 22, wherein receiving the service change notification message sent by the network side device to the terminal of the MBS packet further comprises:

And receiving a specific MAC CE sent by the network side equipment, wherein the specific MAC CE indicates the session suspension of the target MBS or indicates the session stop of the target MBS.

24. The method according to any one of claims 15 to 21, wherein after receiving a service change notification message sent by a network side device to a terminal of the MBS packet, the method further comprises: the terminal obtains the service resource of the target MBS through at least one of the following:

acquiring through a system message;

acquiring through paging information;

acquiring through RRC signaling;

Acquiring a multimedia broadcast multicast service control channel MCCH through a multicast public control channel;

the MTCH is acquired through a multicast transport channel.

25. The method of claim 24, wherein the service resources of the target MBS comprise at least one of:

Configuration information of MCCH;

Configuration information of an MBS Transmission Channel (MTCH);

Logical channel mapping relation;

RB configuration;

QoS configuration.

26. The method of claim 22, wherein after receiving the service change notification message sent by the network-side device to the terminal of the MBS packet, the method further comprises:

If the service type notified by the service change notification message is the session start of the target MBS, the terminal acquires the service resource of the target MBS, maps the logic information of the target MBS, establishes a multicast Management Routing Bridge (MRB), enters the activation state of the target MBS, and starts the service reception of the MBS;

If the service type notified by the service change notification message is the session stop of the target MBS, the terminal ends the service receiving of the target MBS, deactivates the target MBS and releases the service resource of the target MBS;

If the service type notified by the service change notification message is that the session of the target MBS is suspended, the terminal performs one of the following: reserving the MTCH of the target MBS, suspending the target MBS service, and keeping the activation state of the target MBS; reserving MCCH of the target MBS, not reserving MTCH of the target MBS service, and entering a deactivation state of the target MBS; deactivating the target MBS and releasing service resources of the target MBS;

If the service type notified by the service change notification message is session recovery of the target MBS, the terminal performs one of the following: and activating the target MBS, if the service resources of the target MBS are released, acquiring the service resources of the target MBS, and recovering the service reception of the target MBS.

27. A service change notification apparatus, comprising:

A first determining module, configured to determine a service change that needs to be notified to a target multicast broadcast service MBS;

A notification module, configured to send a service change notification message to a group of terminals corresponding to the MBS packet according to the MBS packet to which the target MBS belongs;

wherein the notification module sends a service change notification message to a group of terminals corresponding to the MBS packet by one of:

sending a service change notification message to the group of terminals through a downlink common control channel;

Sending a service change notification message to the group of terminals via a paging channel;

the notification module sends a service change notification message to the group of terminals through a downlink common control channel, and the notification module comprises:

transmitting the downlink common control channel on a group of specific resource sets and/or search spaces corresponding to the terminals, wherein the specific resource sets and/or search spaces are resource sets and/or search spaces which are configured by network side equipment for the terminals and are special for MBS paging;

the notification module performs service change notification on the group of terminals through a paging channel, and the notification module comprises one of the following steps:

Sending a service change notification message to the group of terminals at a first paging position, wherein the first paging position is used for paging multiple services of the terminals, the service change notification message is scrambled through a first RNTI, and the first RNTI corresponds to the target MBS;

and sending a service change notification message to the group of terminals at a second paging position, wherein the second paging position is special for paging of the target MBS of the terminals.

28. The apparatus of claim 27, wherein the notification module sends a service change notification message to the group of terminals over a downlink common control channel, comprising one of:

transmitting first Downlink Control Information (DCI) through the downlink common control channel, wherein the first DCI carries a service change notification message, and the first DCI is scrambled through a first RNTI, and the first RNTI corresponds to the target MBS;

And sending a short message through the downlink common control channel, wherein the short message carries a service change notification message, and the short message is scrambled through a second RNTI.

29. The apparatus of claim 27, wherein the second paging location is determined by at least one of:

Determining a specific resource set and/or search space configured for a group of terminals according to network side equipment, wherein the specific resource set and/or search space is a resource set and/or search space special for MBS paging;

Determining the second paging position according to a target parameter, wherein the target parameter comprises: the paging cycle of the target MBS, the paging frame number included in one paging cycle, and the identification information of the target MBS.

30. The apparatus of claim 27, wherein the notification module sends a service change notification message to a group of terminals of the target MBS, comprising:

And if the service change notification message notifies the session suspension of the target MBS or the session stop of the target MBS, sending a specific MAC CE to the group of terminals, wherein the specific MAC CE indicates the session suspension of the target MBS or the session stop of the target MBS.

31. A service change notification apparatus, comprising:

A second determining module, configured to determine an MBS packet to which a target MBS of the terminal belongs;

a receiving module, configured to receive a service change notification message sent by a network side device to a group of terminals corresponding to the MBS packet at the same time;

The receiving module receives a service change notification message sent by a network side device to a group of terminals corresponding to the MBS packet at the same time, and the service change notification message comprises one of the following steps:

receiving the service change notification message sent by a downlink common control channel;

receiving the service change notification message sent through a paging channel;

The receiving module receives the service change notification message sent by a downlink common control channel, and the service change notification message comprises: detecting the service change notification message sent by the network side equipment in a resource set and/or search space which is configured by the network side equipment for the terminal and is special for MBS paging;

wherein the receiving module receives the service change notification message sent through a paging channel, including one of:

Monitoring at a first paging position by using a first RNTI and a second RNTI respectively, and acquiring the service change notification message through the first RNTI, wherein the first paging position is used for paging multiple services of the terminal, the first RNTI corresponds to the target MBS, and the second RNTI corresponds to services except the target MBS in the multiple services;

and receiving the service change notification message at a second paging position, wherein the second paging position is special for paging of the target MBS of the terminal.

32. The apparatus of claim 31, wherein the second determining module is further configured to determine whether information included in the service change notification message is the same as a last received service change notification message according to the MBS notification change indication in the service change notification message, and if not, to continue parsing the service change notification message.

33. The apparatus of claim 31, wherein the receiving module receives a service change notification message sent by the network side device to the group of terminals through a downlink common control channel, and comprises one of:

monitoring the downlink common control channel by using a first RNTI and a second RNTI respectively, and acquiring a first DCI through the first RNTI, wherein the first DCI carries the service change notification message, and the first RNTI corresponds to the target MBS;

And receiving the short message sent by the downlink common control channel, and descrambling the short message by using a second RNTI, wherein the short message carries a service change notification message.

34. The apparatus of claim 31, wherein the second determination module is further configured to at least one of:

Determining the second paging position according to a specific resource set and/or search space configured by network side equipment for the terminal, wherein the specific resource set and/or search space is a resource set and/or search space special for MBS paging;

Determining the second paging position according to a target parameter, wherein the target parameter comprises: the paging cycle of the target MBS, the number of paging frames included in one paging cycle, and the identification of the target MBS.

35. The apparatus of claim 31, wherein the receiving module is further configured to receive a specific MAC CE sent by a network side device, wherein the specific MAC CE indicates that a session of the target MBS is suspended or indicates that a session of the target MBS is stopped.

36. A network side device comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements the steps of the service change notification method of any of claims 1 to 14.

37. A terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements the steps of the service change notification method of any of claims 15 to 26.

38. A readable storage medium, wherein a program or instructions is stored on the readable storage medium, which when executed by a processor, implements the service change notification method of any of claims 1 to 14, or the steps of the service change notification method of any of claims 15 to 26.