CN116017710A - Method, equipment, device and medium for receiving multimedia broadcast service MBS - Google Patents

Abstract

The application discloses a method, equipment, device and medium for receiving Multimedia Broadcast Service (MBS), which are used for solving the problem of how to ensure the continuity of receiving MBS service in the mobile process of a terminal. The method comprises the following steps: receiving a system information block broadcasted by at least one first cell, wherein the system information block carries position area information of the at least one first cell, and the first cell is a neighboring cell of a service cell accessed by the terminal; determining a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from the at least one first cell according to a predetermined service identifier of the MBS service, a corresponding relation between the frequency point and the position area information, a service identifier of the target MBS service interested by the terminal and the position area information of each first cell; and adjusting the priority of the frequency point of the candidate cell to be the highest, and receiving service data of the target MBS service after reselecting to the candidate cell.

Description

Method, equipment, device and medium for receiving multimedia broadcast service MBS

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a medium for receiving a multimedia broadcast service MBS.

Background

As a new generation wireless access technology network, a fifth generation new air interface (5th new radio,5G NR) system has a need for multicast/broadcast service, and the multimedia broadcast service (Multicast Broadcast Service, MBS) technology thereof realizes sharing of network resources, thereby improving the utilization rate of the network resources.

In the existing single-frequency point deployment scenario, one MBS service corresponds to one frequency point, and one frequency point corresponds to one cell. The terminal determines the frequency point where the target MBS service is deployed according to the temporary mobile group identifier (Temporary Mobile Group Identity, TMGI) of the target MBS service which is wanted to be received and the corresponding relation between the TMGI and the frequency point in the user service description (User Service Description, USD) information, and further obtains the service data of the target MBS service through the cell corresponding to the frequency point.

However, when one MBS service corresponds to a plurality of frequency points, the TMGI of each MBS service in the USD information also corresponds to a plurality of frequency points, according to the above manner, the terminal determines a plurality of frequency points corresponding to the target MBS service, and once cell reselection occurs, the terminal cannot determine a candidate cell according to the plurality of frequency points, thereby affecting continuity of the target MBS service.

Disclosure of Invention

The application provides a method, equipment, device and medium for receiving a Multimedia Broadcast Service (MBS), which are used for solving the problem of how to ensure the continuity of receiving the MBS service in the mobile process of a terminal.

In a first aspect, the present application provides a method for receiving a multimedia broadcast service MBS, applied to a terminal, where the method includes:

receiving a system information block broadcasted by at least one first cell, wherein the system information block carries position area information of the first cell, and the first cell is a neighboring cell of a service cell accessed by the terminal;

determining a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from the at least one first cell according to a predetermined corresponding relation among the service identification of the MBS service, the frequency point and the position area information, the service identification of the target MBS service interested by the terminal and the position area information of each first cell;

and adjusting the priority of the frequency point corresponding to the candidate cell to the highest, and receiving the service data of the target MBS service after reselecting to the candidate cell.

In some embodiments, prioritizing the frequency points of the candidate cells to be highest includes:

And if the number of the candidate cells is greater than 1, selecting one cell from the candidate cells as a reselected target cell, and adjusting the priority of the frequency point corresponding to the target cell to be the highest.

In some embodiments, the corresponding relationship between the service identifier, the frequency point and the location area of the MBS service is determined by:

and obtaining the service identification of the MBS service and the corresponding relation between the frequency point and the position area according to the first corresponding relation between the preconfigured frequency point and the position area information, the second corresponding relation between the service identification of the MBS service and the frequency point, and the third corresponding relation between the service identification of the MBS service and the position area.

In some embodiments, the second correspondence between the service identifier of the MBS service and the frequency point, the third correspondence between the service identifier of the MBS service and the location area are obtained by:

and acquiring User Service Description (USD) information, and acquiring a second corresponding relation between a service identifier of the MBS service and the frequency point and a third corresponding relation between the service identifier of the MBS service and the position area from the USD information.

In some embodiments, the first correspondence between the preconfigured frequency points and the location areas is stored locally at the terminal or in the user service description USD information.

In some embodiments, the location area information includes any one of the following information: the service area identification SAI table, tracking area identification TAI and cell identification.

In a second aspect, the present application provides a MBS reception apparatus for a multimedia broadcast service, including: memory, transceiver, and processor, wherein:

the memory is used for storing a computer program;

the transceiver is used for receiving and transmitting data under the control of the processor;

the processor is configured to read the computer program in the memory and perform the following operations:

receiving a system information block broadcasted by at least one first cell, wherein the system information block carries position area information of the first cell, and the first cell is a neighboring cell of a service cell accessed by the terminal;

determining a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from the at least one first cell according to a predetermined corresponding relation among the service identification of the MBS service, the frequency point and the position area information, the service identification of the target MBS service interested by the terminal and the position area information of each first cell;

and adjusting the priority of the frequency point of the candidate cell to be the highest, and receiving the service data of the target MBS service after reselecting to the candidate cell.

In some embodiments, the processor is specifically configured to:

and if the number of the candidate cells is greater than 1, selecting one cell from the candidate cells as a reselected target cell, and adjusting the priority of the frequency point corresponding to the target cell to be the highest.

In some embodiments, the processor is specifically configured to:

and obtaining the service identification of the MBS service, the corresponding relation between the frequency point and the position area according to the first corresponding relation between the preconfigured frequency point and the position area information, the second corresponding relation between the acquired service identification of the MBS service and the frequency point, and the third corresponding relation between the acquired service identification of the MBS service and the position area.

In some embodiments, the processor is specifically configured to:

and acquiring User Service Description (USD) information, and acquiring a second corresponding relation between a service identifier of the MBS service and the frequency point and a third corresponding relation between the service identifier of the MBS service and the position area from the USD information.

In some embodiments, the first correspondence between the preconfigured frequency points and the location areas is stored locally at the terminal or in the user service description USD information.

In some embodiments, the location area information includes any one of the following information: the service area identification SAI table, tracking area identification TAI and cell identification.

In a third aspect, the present application provides a MBS reception apparatus, including:

a receiving unit, configured to receive a system information block broadcasted by at least one first cell, where the system information block carries location area information of the first cell, and the first cell is a neighboring cell of a serving cell to which the terminal is connected;

a determining unit, configured to determine, from the at least one first cell, a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell according to a predetermined service identifier of the MBS service, a correspondence between a frequency point and location area information, a service identifier of a target MBS service interested by the terminal, and location area information of each first cell;

the receiving unit is configured to adjust the priority of the frequency point of the candidate cell to be highest, and receive service data of the target MBS service after reselecting to the candidate cell.

In some embodiments, the determining unit is specifically configured to: and if the number of the candidate cells is greater than 1, selecting one cell from the candidate cells as a reselected target cell, and adjusting the priority of the frequency point corresponding to the target cell to be the highest.

In some embodiments, the apparatus further comprises an acquisition unit for:

and obtaining the service identification of the MBS service, the corresponding relation between the frequency point and the position area according to the first corresponding relation between the preconfigured frequency point and the position area information, the second corresponding relation between the acquired service identification of the MBS service and the frequency point, and the third corresponding relation between the acquired service identification of the MBS service and the position area.

In some embodiments, the acquiring unit is specifically configured to:

and acquiring User Service Description (USD) information, and acquiring a second corresponding relation between a service identifier of the MBS service and the frequency point and a third corresponding relation between the service identifier of the MBS service and the position area from the USD information.

In some embodiments, the first correspondence between the preconfigured frequency points and the location areas is stored locally at the terminal or in the user service description USD information.

In some embodiments, the location area information includes any one of the following information: the service area identification SAI table, tracking area identification TAI and cell identification.

In a fourth aspect, embodiments of the present application also provide a computer-readable storage medium having stored thereon a computer program which, when executed by the processor 600, implements the steps of any of the methods of the first aspect.

By adopting the technical scheme, the embodiment of the application at least comprises the following beneficial effects:

in this embodiment of the present application, a terminal may obtain, according to a system information block broadcasted by at least one first cell, area location information of the first cell, determine, from the at least one first cell, a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell, in other words, according to the area location information and a preset correspondence, and may accurately determine, from the at least one first cell, the candidate cell supporting the target MBS service and the frequency point corresponding to the candidate cell, according to a predetermined service identifier of the MBS service, a correspondence between a frequency point and location area information, a service identifier of the target MBS service that the terminal is interested in, and location area information of each first cell. And the frequency point corresponding to the candidate cell is set as the highest priority, and the terminal reselects to the candidate cell when reselecting the cell, thereby ensuring the continuity of receiving the multimedia broadcast service in the moving process of the terminal.

Drawings

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

Fig. 1 is a schematic application scenario diagram of a method for receiving an MBS according to an embodiment of the present application;

fig. 2 is an interaction schematic diagram of a base station and a terminal provided in an embodiment of the present application;

fig. 3 is a schematic interaction diagram of a base station, a terminal, and an AF node according to an embodiment of the present disclosure;

fig. 4 is a second interaction schematic diagram of a base station, a terminal, and an AF node provided in the embodiments of the present application;

fig. 5 is a third interaction schematic diagram of a base station, a terminal, and an AF node provided in the embodiments of the present application;

fig. 6 is a schematic structural diagram of an MBS receiving device for a multimedia broadcast service according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a MBS receiving device for a multimedia broadcast service according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. Embodiments and features of embodiments in this application may be combined with each other arbitrarily without conflict. Also, while a logical order of illustration is depicted in the flowchart, in some cases the steps shown or described may be performed in a different order than presented.

The terms first and second in the description and claims of the present application and in the above-described figures are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover non-exclusive protection. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The term "plurality" in the present application may mean at least two, for example, two, three or more, and embodiments of the present application are not limited.

In order to facilitate understanding of the technical solutions provided by the embodiments of the present application, the following description will explain some nouns related to the embodiments of the present application:

1. and (3) a base station: is a device for interfacing a terminal device to a wireless network in a communication system. A base station is a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a radio access network (radio access network, RAN) node (or device). Currently, some examples of base stations are: a gNB, a transmission and reception point (transmission reception point, TRP), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), or a wireless fidelity (wireless fidelity, wifi) Access Point (AP), etc.

2. And (3) a terminal: also called a terminal device, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a user, such as a handheld device, a vehicle mounted device, etc., with wireless connection capability. Currently, some examples of terminals are: a mobile phone, a tablet, a notebook, a palm, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (self-driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like.

The following describes a continuity mechanism of a multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS) in a long term evolution (long term evolution, LTE) system in the related art.

The terminal does not need to read a multicast control channel (Multicast Control Channel, MCCH)/Single Cell multicast control channel (SC-MCCH) of the candidate Cell, but determines whether the corresponding frequency point provides the corresponding MBMS service through the combination of MBMS assistance information. The MBMS assistance information includes USD information and a system information block (System Information Block, SIB), wherein the USD information includes a correspondence between each MBMS service and each TMGI, a correspondence between each TMGI and each frequency point, a session start time and a session end time of each MBMS service, and a correspondence between each MBMS service and each service area identifier (Service Area Identities, SAI) list. The SIB contains auxiliary information supporting the mobility of MBS UE, and specifically comprises the corresponding relation between each frequency point and each SAI list.

The terminal determines which frequency point provides the MBMS service that it wants to receive, based on the MBMS assistance information, in the following manner.

1. The serving cell broadcasts SIB15.

If the service cell in which the terminal currently resides broadcasts SIB15, the terminal determines which frequency point provides the MBMS service the terminal wants to receive according to the SIB15 and the USD information. For example, the MBMS service of interest to the terminal is a target MBMS service, the terminal determines a target SAI list corresponding to the target MBMS service according to the corresponding relationship between each MBMS and each SAI list in the USD information, determines a target frequency point corresponding to the target SAI list according to the corresponding relationship between each frequency point and each SAI list in SIB15, and further determines that the target frequency point provides the target MBMS service.

2. The serving cell does not broadcast SIB15.

If the service cell in which the terminal is currently resident does not broadcast the SIB15, the terminal determines which frequency point provides the MBMS service which the terminal wants to receive according to the corresponding relation between the TMGI and the frequency point in the USD information. For example, the MBMS service of interest to the terminal is a target MBMS service, and the terminal may determine a target TMGI corresponding to the target MBMS service according to the corresponding relationship between each MBMS service and each TMGI in the USD, and then determine a target frequency point corresponding to the target TMGI according to the corresponding relationship between each TMGI and each frequency point, thereby determining that the target frequency point provides the target MBMS service.

The terminal performs the following procedure in addition to performing cell reselection using the conventional cell reselection rule:

(1) The terminal can only receive the interested MBMS service by the cell which resides on a certain frequency point, and the priority of the frequency point is set as the highest priority.

(2) The terminal can continuously receive the MBMS in the moving process only by reselecting and residing in the candidate cell of a certain frequency point, and the priority of the frequency point is set as the highest priority.

(3) When the MBMS service of interest to the terminal is no longer available, e.g. after the session has ended, or the terminal does not want to receive the MBMS service any more, the terminal no longer prioritizes the reselection to the cell on the frequency point providing the MBMS service.

In the prior art, when the serving cell does not broadcast SIB15 containing information supporting MBS UE mobility, a frequency point providing a target MBS service is determined according to a correspondence between TMGI and a frequency point in USD information. When one MBS service corresponds to a plurality of frequency points, the TMGI of each MBS service in the USD information also corresponds to a plurality of frequency points, and according to the mode, the terminal determines the plurality of frequency points corresponding to the target MBS service, which frequency point provides the MBS service which the terminal wants to receive, and further, the priority of which frequency point is set to be the highest priority, and finally, the continuity of receiving the MBS service by the terminal in the moving process cannot be ensured.

In view of this, the embodiments of the present application provide a method for receiving a multimedia broadcast service, which may be applied to, but not limited to, a 5G NR system, a long term evolution (long term evolution, LTE) system, a long term evolution advanced (long term evolution-advanced, LTE-a) system, an enhanced long term evolution technology (enhanced long term evolution-advanced, eete) system, and other communication systems, and may also be subsequently extended to, for example, a wireless fidelity (wireless fidelity, wiFi), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wimax), a future wireless communication system, and a 3GPP related cellular system.

The method for receiving the multimedia broadcast service is described below with reference to an application scenario diagram of the method for receiving the multimedia broadcast service shown in fig. 1.

The application scenario diagram shown in fig. 1 includes a base station 110 and a terminal 120, where the base station 110 and the terminal 120 may communicate with each other. It should be noted that fig. 1 is an example of one base station 110 and one terminal 120, and in practice, the number of base stations 110 and terminals 120 in the communication system shown in fig. 1 is not limited in the embodiments of the present application.

Specifically, the terminal 120 determines the candidate cell supporting the target MBS service and the frequency point corresponding to the candidate cell from the multiple neighbor cells according to the area location information of the neighbor cells and the preset correspondence, and adjusts the priority of the frequency point of the candidate cell to be highest, so that the terminal can reselect to the candidate cell when reselecting the cell, and further the terminal 120 can receive the service data of the target MBS service in the moving process, thereby ensuring the continuity of receiving the MBS service. The process of determining the target frequency point by the terminal 120 will be described in detail below.

Based on the application scenario discussed in fig. 1, the method for receiving the MBS of the multimedia broadcast service according to the embodiment of the present application will be described below by taking the method for receiving the MBS of the multimedia broadcast service performed by the terminal shown in fig. 2 as an example.

S201, receiving a system information block broadcasted by at least one first cell.

The cell to which the terminal is currently accessed is a serving cell, the first cell is a neighboring cell of the serving cell to which the terminal is accessed, and the first cell can broadcast its own system information block SIB (the system information block referred to in this application is SIB 1) through the base station, so that the terminal receives the system information block broadcast by at least one first cell. The system information block may be an existing SIB, such as SIB1, or a newly added SIB, but has similar capabilities as SIB 1.

The system information block carries location area information of the first cell, where the location area information is used to represent a location of the first cell, and the location area information includes any one of the following information, which are described below respectively.

The location area information (one) is an SAI list.

SAI is used to uniquely identify one or more cells that belong to one location area. According to different SAI partitioning methods, a cell may be identified with different SAIs, and thus each cell corresponds to an SAI list, each SAI list comprising one or more SAIs.

The (two) location area information is tracking area identity (Tracking Area Identity, TAI).

The TAI is used to uniquely identify a tracking area within a public land mobile network (Public Land Mobile Network, PLMN), and consists of a public land mobile network identification (Public Land Mobile Network Identity, PLMN ID) and a tracking area code (Tracking Area Cod, TAC).

And (III) the location area information is a cell identifier.

The cell identity is used to uniquely identify each cell.

The embodiment of the application provides various representation modes of the position area information, and the base station and the terminal can predetermine the specific representation modes of the position area information in actual conditions. For example, the location area information is an SAI list, the terminal obtains the SAI list of the first cell from the received SIB, or for example, the location area information is a cell identifier, the terminal obtains the cell identifier of the first cell from the received SIB, or for example, the location area information is a TAI, the terminal obtains the TAI of the first cell from the received SIB.

S202, according to a predetermined service identifier of MBS service, a corresponding relation between frequency points and position area information, a service identifier of target MBS service interested by a terminal and position area information of each first cell, determining a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from at least one first cell.

The terminal needs to pre-determine the corresponding relation between the service identifier, the frequency point and the position area information of the MBS service, the service identifier of one MBS service can correspond to a plurality of frequency points, and each frequency point corresponds to one position area information. In order to more clearly describe the correspondence between the service identifier, the frequency point and the location area information of the MBS service, refer to table 1.

TABLE 1

The service identifier of the first MBS service is MBS1, where MBS1 corresponds to two frequency points, namely frequency point 1 and frequency point 2, where frequency point 1 corresponds to location area information 1, and frequency point 2 corresponds to location area information 2. The service identifier of the second MBS service is MBS2, the MBS2 corresponds to three frequency points which are frequency point 3, frequency point 4 and frequency point 5 respectively, the frequency point 3 corresponds to the position area information 3, the frequency point 4 corresponds to the position area information 4, and the frequency point 4 corresponds to the position area information 5.

The following describes how the terminal specifically determines the corresponding relationship between the service identifier, the frequency point and the location area information of the MBS service.

As an embodiment, the correspondence between the service identifier, the frequency point and the location area of the MBS service may be directly stored in the terminal, for example, the vendor may configure the correspondence in the terminal in advance when the vendor produces the terminal.

As an embodiment, the corresponding relationship among the service identifier, the frequency point and the location area of the MBS service may be stored in USD information, and the terminal acquires and stores the USD information. For example, an application service (Application Function, AF) node of the core network issues USD information in the MBS service announcement procedure, where the USD information includes service identification of the MBS service, correspondence between frequency points and location areas.

As an embodiment, the terminal may obtain the service identifier of the MBS service, the correspondence between the frequency point and the location area according to the first correspondence between the preconfigured frequency point and the location area information, the second correspondence between the acquired service identifier of the MBS service and the frequency point, and the third correspondence between the acquired service identifier of the MBS service and the location area.

Specifically, the terminal obtains user service description USD information, obtains a second corresponding relation between a service identifier of the MBS service and the frequency point from the USD information, and obtains a third corresponding relation between the service identifier of the MBS service and the location area. The first correspondence between the preconfigured frequency points and the location areas is stored locally at the terminal or in the USD information. The USD information is obtained by referring to the foregoing discussion, and will not be described herein.

As an embodiment, the first correspondence between the frequency point and the location area information, the second correspondence between the service identifier of the MBS service and the frequency point, and the third correspondence between the service identifier of the MBS service and the location area may be stored locally in the terminal, where the terminal obtains the correspondence between the service identifier of the MBS service, the frequency point and the location area directly according to the stored first correspondence, second correspondence and third correspondence.

It should be noted that, since there are various expression modes of the location area information, there are various service identifiers of MBS services, and correspondence between frequency points and location areas, which are described below.

In the first case, the location area information is an SAI list. At this time, the corresponding relationship between the service identifier, the frequency point and the location area of the MBS service is specifically the corresponding relationship between the service identifier, the frequency point and the SAI list of the MBS service.

In the second case, the location area information is a cell identity. At this time, the corresponding relationship between the service identifier, the frequency point and the location area of the MBS service is specifically the corresponding relationship between the service identifier, the frequency point and the cell identifier of the MBS service.

In the third case, the location area information TAI. At this time, the corresponding relationship between the service identifier, the frequency point and the location area of the MBS service is specifically the corresponding relationship between the service identifier, the frequency point and the TAI of the MBS service.

After obtaining the service identifier of the MBS service and the corresponding relation between the frequency point and the position area, the terminal saves the corresponding relation in the terminal local, and then the terminal can determine the candidate cell supporting the target MBS service and the frequency point corresponding to the candidate cell from at least one first cell according to the predetermined corresponding relation, the service identifier of the target MBS service interested by the terminal and the position area information of each first cell.

Specifically, according to the service identifier of the target MBS service of interest to the terminal and the predetermined correspondence, a plurality of frequency points corresponding to the target MBS service may be determined first, and then, by combining the area location information of the first cell and the predetermined correspondence, the frequency point corresponding to the area location information of the first cell may be determined, where the first cell is a candidate cell supporting the target MBS service.

S203, the priority of the frequency point corresponding to the candidate cell is adjusted to be the highest, and the service data of the target MBS service is received after the candidate cell is reselected.

After determining the candidate cells supporting the target MBS service, if the number of the candidate cells is 1, the terminal can directly adjust the priority of the frequency point corresponding to the candidate cells to the highest. If the number of the candidate cells is greater than 1, selecting one cell from the candidate cells as a reselected target cell, and adjusting the priority of the frequency point corresponding to the target cell to be the highest. For example, one cell satisfying a preset condition is selected from the candidate cells as a target cell, and the preset condition may be a cell closest to a serving cell to which the terminal accesses or a cell having a strongest signal.

After the terminal adjusts the priority of the frequency point corresponding to the target cell to the highest, cell reselection can be performed, the terminal reselects to a candidate cell, and after the terminal moves to the candidate cell, the terminal resides in the candidate cell, so that service data of the target MBS service sent by the base station can be received.

The following describes the method for receiving the MBS in detail by taking the area location information as an SAI list as an example, and combining with the interaction diagram between the base station, the terminal and the AF node shown in fig. 3.

S301, the AF node issues USD information.

The AF node issues USD information in the MBS service declaring process, wherein the USD information comprises service identification of MBS service, and corresponding relation between frequency point and SAI list.

S302, the terminal resides in the service cell, and receives and stores USD information.

S303, the base station transmits the target MBS service.

S304, the terminal receives the target MBS service.

S305, the base station broadcasts SIB carrying SAI list of the first cell.

S306, the terminal receives SIB carrying SAI list of the first cell.

S307, the terminal determines candidate cells supporting the target MBS service and frequency points corresponding to the candidate cells from at least one first cell according to the predetermined service identification of the MBS service, the corresponding relation between the frequency points and the SAI list, the service identification of the target MBS service interested by the terminal and the SAI list of each first cell.

And S308, the terminal adjusts the priority of the frequency point corresponding to the candidate cell to be the highest.

S309, the base station continues to send the target MBS service.

S310, the terminal reselects to the candidate cell and then continues to receive the target MBS service.

And the terminal performs cell reselection based on the highest priority of the frequency point, and after reselecting to the candidate cell, the terminal can move to the candidate cell to continuously receive the target MBS service.

The following describes the multimedia broadcast service receiving method in detail by taking the area location information as an example of the cell identifier, and combining with the second interaction diagram among the base station, the terminal and the AF node shown in fig. 4.

S401, the AF node issues USD information.

The AF node issues USD information in the MBS service declaring process, wherein the USD information comprises the service identification of the MBS service and the corresponding relation between the frequency point and the cell identification.

S402, the terminal resides in the service cell, and receives and stores USD information.

S403, the base station sends the target MBS service to the terminal.

S404, the terminal receives the target MBS service.

S405, the base station broadcasts an SIB carrying the cell identification of the first cell.

S406, the terminal receives SIB carrying the cell identification of the first cell.

S407, the terminal determines a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from at least one first cell according to a predetermined service identifier of the MBS service, a corresponding relation between the frequency point and the cell identifier, a service identifier of the target MBS service interested by the terminal and the cell identifier of each first cell.

And S408, the terminal adjusts the priority of the frequency point corresponding to the candidate cell to be the highest.

S409, the base station continues to send the target MBS service.

S410, the terminal reselects to the candidate cell and then continues to receive the target MBS service.

The following describes the multimedia broadcast service receiving method in detail by taking the area location information as a TAI as an example, and combining with the interaction diagram three between the base station, the terminal and the AF node shown in fig. 5.

S501, the AF node issues USD information.

The AF node issues USD information in the MBS service declaring process, wherein the USD information comprises service identification of MBS service, and corresponding relation between frequency point and TAI.

S502, the terminal resides in the service cell, and receives and stores USD information.

S503, the base station transmits the target MBS.

S504, the terminal receives the target MBS service.

S505, the base station broadcasts an SIB carrying the TAI of the first cell.

S506, the terminal receives SIB carrying TAI of the first cell.

S507, the terminal determines a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from at least one first cell according to a predetermined service identifier of the MBS service, a corresponding relation between the frequency point and TAI, a service identifier of the target MBS service interested by the terminal and the TAI of each first cell.

And S508, the terminal adjusts the priority of the frequency point corresponding to the candidate cell to be the highest.

S509, the base station continues to send the target MBS service.

S510, the terminal reselects to the candidate cell and then continues to receive the target MBS service.

Based on the same inventive concept, an embodiment of the present application provides a multimedia broadcast service MBS receiving apparatus, as shown in fig. 6, including: a processor 600, a memory 601 and a transceiver 602; wherein:

a processor 600 for reading the computer program in the memory 601 and performing the following operations:

receiving a system information block broadcasted by at least one first cell, wherein the system information block carries the position area information of the first cell, and the first cell is a neighboring cell of a service cell accessed by a terminal;

according to a predetermined service identifier of MBS service, a corresponding relation between a frequency point and position area information, a service identifier of target MBS service of interest of a terminal and position area information of each first cell, determining a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from at least one first cell;

and adjusting the priority of the frequency point of the candidate cell to be the highest, and receiving service data of the target MBS service after reselecting to the candidate cell.

In some embodiments, the processor 600 is specifically configured to:

if the number of the candidate cells is greater than 1, selecting one cell from the candidate cells as a reselected target cell, and adjusting the priority of the frequency point corresponding to the target cell to be the highest.

In some embodiments, the processor 600 is specifically configured to:

and obtaining the service identification of the MBS service, the corresponding relation between the frequency point and the position area according to the first corresponding relation between the preconfigured frequency point and the position area information, the second corresponding relation between the acquired service identification of the MBS service and the frequency point, and the third corresponding relation between the acquired service identification of the MBS service and the position area.

In some embodiments, the processor 600 is specifically configured to:

and acquiring User Service Description (USD) information, and acquiring a second corresponding relation between the service identifier of the MBS service and the frequency point and a third corresponding relation between the service identifier of the MBS service and the position area from the USD information.

In some embodiments, the first correspondence between preconfigured frequency points and location areas is stored locally at the terminal or in the user service description USD information.

In some embodiments, the location area information includes any one of the following information: the service area identification SAI table, tracking area identification TAI and cell identification.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 601 may store data used by the processor 600 in performing operations. The transceiver 602 is used to receive and transmit data under the control of the processor 600600.

The flow disclosed in the embodiments of the present application may be applied to the processor 600 or implemented by the processor 600. In implementation, the steps of the signal processing flow may be performed by integrated logic circuitry of hardware in processor 600 or instructions in the form of software. The processor 600 may be a general purpose processor 600, a digital signal processor 600, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, where the methods, steps and logic blocks disclosed in the embodiments of the present application may be implemented or performed. The general purpose processor 600 may be a microprocessor 600 or any conventional processor 600 or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware processor 600 for execution, or in a combination of hardware and software modules in processor 600. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 601, and the processor 600 reads the information in the memory 601 and combines the steps of the method flow for completing data transmission with its hardware.

The apparatus of fig. 6 may be used to implement any of the previously discussed methods of receiving a multimedia broadcast service MBS, and may also be used to implement the functions of any of the previously discussed terminals.

Based on the same inventive concept, the embodiments of the present application further provide a device for receiving an MBS, as shown in fig. 7, where the device includes:

a receiving unit 701, configured to receive a system information block broadcasted by at least one first cell, where the system information block carries location area information of the first cell, and the first cell is a neighboring cell of a serving cell to which the terminal is accessed;

a determining unit 702, configured to determine, from at least one first cell, a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell according to a predetermined service identifier of the MBS service, a correspondence between a frequency point and location area information, a service identifier of the target MBS service interested by the terminal, and location area information of each first cell;

the receiving unit 701 is further configured to adjust the priority of the frequency point of the candidate cell to be the highest, and receive service data of the target MBS service after reselecting to the candidate cell.

In some embodiments, the determining unit 702 is specifically configured to: if the number of the candidate cells is greater than 1, selecting one cell from the candidate cells as a reselected target cell, and adjusting the priority of the frequency point corresponding to the target cell to be the highest.

In some embodiments, the apparatus further comprises an acquisition unit 703, the acquisition unit 703 being configured to:

and obtaining the service identification of the MBS service, the corresponding relation between the frequency point and the position area according to the first corresponding relation between the preconfigured frequency point and the position area information, the second corresponding relation between the acquired service identification of the MBS service and the frequency point, and the third corresponding relation between the acquired service identification of the MBS service and the position area.

In some embodiments, the obtaining unit 703 is specifically configured to:

and acquiring User Service Description (USD) information, and acquiring a second corresponding relation between the service identifier of the MBS service and the frequency point and a third corresponding relation between the service identifier of the MBS service and the position area from the USD information.

In some embodiments, the first correspondence between preconfigured frequency points and location areas is stored locally at the terminal or in the user service description USD information.

In some embodiments, the location area information includes any one of the following information: the service area identification SAI table, tracking area identification TAI and cell identification.

The apparatus in fig. 7 may be used to implement any of the foregoing methods for receiving a MBS of a multimedia broadcast service, and may also be provided in the MBS receiving device of the multimedia broadcast service discussed in fig. 6, to implement the functions of the MBS receiving device of the multimedia broadcast service discussed in fig. 6.

Based on the same inventive concept, the embodiments of the present application also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the aforementioned multimedia broadcast service MBS reception method.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor 600 of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor 600 of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (11)

1. A method for receiving a multimedia broadcast service MBS, applied to a terminal, the method comprising:

receiving a system information block broadcasted by at least one first cell, wherein the system information block carries position area information of the first cell, and the first cell is a neighboring cell of a service cell accessed by the terminal;

determining a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from the at least one first cell according to a predetermined corresponding relation among the service identification of the MBS service, the frequency point and the position area information, the service identification of the target MBS service interested by the terminal and the position area information of each first cell;

and adjusting the priority of the frequency point corresponding to the candidate cell to the highest, and receiving the service data of the target MBS service after reselecting to the candidate cell.

2. The method of claim 1, wherein prioritizing the frequency points of the candidate cells to be highest comprises:

and if the number of the candidate cells is greater than 1, selecting one cell from the candidate cells as a reselected target cell, and adjusting the priority of the frequency point corresponding to the target cell to be the highest.

3. The method of claim 1, wherein the correspondence between service identities, frequency points, and location areas of MBS services is determined by:

and obtaining the service identification of the MBS service and the corresponding relation between the frequency point and the position area according to the first corresponding relation between the preconfigured frequency point and the position area information, the second corresponding relation between the service identification of the MBS service and the frequency point, and the third corresponding relation between the service identification of the MBS service and the position area.

4. The method of claim 3, wherein the second correspondence between service identities and frequency points of the MBS service, the third correspondence between service identities of the MBS service and location areas are obtained by:

and acquiring User Service Description (USD) information, and acquiring a second corresponding relation between a service identifier of the MBS service and the frequency point and a third corresponding relation between the service identifier of the MBS service and the position area from the USD information.

5. A method as claimed in claim 3, wherein the first correspondence between the preconfigured frequency points and the location areas is stored locally at the terminal or in user service description USD information.

6. The method of claim 1, wherein the location area information comprises any one of the following information: the service area identification SAI table, tracking area identification TAI and cell identification.

7. A multimedia broadcast service MBS reception apparatus, comprising: memory, transceiver, and processor, wherein:

the memory is used for storing a computer program;

the transceiver is used for receiving and transmitting data under the control of the processor;

the processor is configured to read the computer program in the memory and perform the following operations:

receiving a system information block broadcasted by at least one first cell, wherein the system information block carries position area information of the first cell, and the first cell is a neighboring cell of a service cell accessed by the terminal;

determining a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell from the at least one first cell according to a predetermined corresponding relation among the service identification of the MBS service, the frequency point and the position area information, the service identification of the target MBS service interested by the terminal and the position area information of each first cell;

And adjusting the priority of the frequency point of the candidate cell to be the highest, and receiving the service data of the target MBS service after reselecting to the candidate cell.

8. The apparatus of claim 7, wherein the processor is specifically configured to:

and obtaining the service identification of the MBS service, the corresponding relation between the frequency point and the position area according to the first corresponding relation between the preconfigured frequency point and the position area information, the second corresponding relation between the acquired service identification of the MBS service and the frequency point, and the third corresponding relation between the acquired service identification of the MBS service and the position area.

9. The apparatus of claim 8, wherein the first correspondence between the preconfigured frequency points and location areas is stored locally at the terminal or in user service description USD information.

10. A multimedia broadcast service MBS reception apparatus, comprising:

a receiving unit, configured to receive a system information block broadcasted by at least one first cell, where the system information block carries location area information of the first cell, and the first cell is a neighboring cell of a serving cell to which the terminal is connected;

a determining unit, configured to determine, from the at least one first cell, a candidate cell supporting the target MBS service and a frequency point corresponding to the candidate cell according to a predetermined service identifier of the MBS service, a correspondence between a frequency point and location area information, a service identifier of a target MBS service interested by the terminal, and location area information of each first cell;

The receiving unit is configured to adjust the priority of the frequency point of the candidate cell to be highest, and receive service data of the target MBS service after reselecting to the candidate cell.

11. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.

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