CN117279054A

CN117279054A - Cell reselection method, device and storage medium

Info

Publication number: CN117279054A
Application number: CN202210672578.6A
Authority: CN
Inventors: 曾二林; 周锐; 梁靖
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2023-12-22
Also published as: WO2023241512A1

Abstract

The embodiment of the application provides a cell reselection method, a cell reselection device and a storage medium, wherein the method comprises the following steps: acquiring multicast broadcast service information, wherein the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support a terminal to receive the multicast broadcast service in an inactive state, and the terminal is in the inactive state or idle state; and determining a reselection target cell based on the multicast broadcast service information, and receiving the multicast broadcast service in the reselection target cell. According to the cell reselection method, the cell reselection device and the storage medium, for the terminal in the idle state or the inactive state, the multicast broadcast service information is acquired to judge whether the candidate cell and/or the candidate frequency point support the terminal to receive the multicast broadcast service in the inactive state, and the multicast broadcast service information is considered when the reselection target cell is determined, so that the continuity of receiving the multicast broadcast service is improved.

Description

Cell reselection method, device and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a cell reselection method, a cell reselection device, and a storage medium.

Background

Multimedia broadcast multicast services (Multimedia Broadcast Multicast Services, MBMS) have long existed as a primary service type. But only unicast services are supported in the New Radio (NR) of the fifth generation mobile communication (the 5th Generation Mobile Communication,5G), and in view of the importance of MBMS services for certain vertical fields (e.g. internet of vehicles, public safety, etc.), support of multicast broadcast services (Multicast Broadcast Service, MBS) is also increased in 5G.

In the related art, only a terminal (UE) is supported to receive a multicast broadcast service in a CONNECTED (CONNECTED) state. When the number of terminals in a network is large, the system is blocked; and when the terminal receives the multicast service, the terminal is always in a connected state, so that the power consumption of the terminal can be increased. The terminal continues to receive the multicast broadcast service after switching from the connected state to the INACTIVE (IDLE) state or the IDLE (IDLE) state, so that the above problems can be effectively solved.

However, for the terminal in the inactive state or the idle state, if the terminal needs to switch to the connection state or receive the service only in the unicast mode after reselecting to another frequency point or the cell, interruption or larger time delay of receiving the multicast broadcast service may be caused.

Disclosure of Invention

In view of the foregoing problems in the related art, embodiments of the present application provide a cell reselection method, apparatus, and storage medium.

In a first aspect, an embodiment of the present application provides a cell reselection method, including:

acquiring multicast broadcast service information, wherein the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support a terminal to receive the multicast broadcast service in an inactive state, and the terminal is in the inactive state or idle state;

And determining a reselection target cell based on the multicast broadcast service information, and receiving the multicast broadcast service in the reselection target cell.

Optionally, the receiving multicast broadcast service includes:

receiving the multicast broadcast service in an inactive state under the condition that the reselection target cell supports the terminal to receive the multicast broadcast service in the inactive state; or alternatively, the first and second heat exchangers may be,

and switching to a connection state and receiving the multicast broadcast service under the condition that the reselection target cell does not support the terminal to receive the multicast broadcast service in an inactive state.

Optionally, the determining a reselection target cell based on the multicast broadcast service information includes:

determining reselection priorities of candidate cells and/or candidate frequency points based on the multicast broadcast service information;

and determining the reselection target cell based on the reselection priority.

determining a first candidate frequency point based on the multicast broadcast service information, wherein the first candidate frequency point meets the requirements of supporting a first multicast broadcast service which is being received by the terminal and/or a second multicast broadcast service which is interested by the terminal, and/or supporting the terminal to receive the multicast broadcast service in an inactive state;

And determining the reselection target cell according to the first candidate frequency point.

Optionally, the acquiring multicast broadcast service information includes:

and receiving system information and/or multicast control channel information sent by network equipment, wherein the system information and/or the multicast control channel information carries multicast broadcast service information.

Optionally, the multicast broadcast service information includes at least one of:

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

indication information of whether the candidate cell and/or the candidate frequency point support multicast broadcast service;

indication information of whether the candidate cell and/or the candidate frequency point support the first multicast broadcast service being received by the terminal;

indication information of whether the candidate cell and/or the candidate frequency point support a second multicast broadcast service of interest to the terminal;

whether the candidate cell and/or the candidate frequency point are providing the first multicast broadcast service in a point-to-multipoint manner, and whether the first multicast broadcast service supports the indication information received by the inactive state terminal.

In a second aspect, an embodiment of the present application further provides a cell reselection method, including:

transmitting system information and/or multicast control channel information to a terminal in an inactive state or an idle state, wherein the system information and/or the multicast control channel information carry multicast broadcast service information, and the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support the terminal to receive the multicast broadcast service in the inactive state;

And sending the multicast broadcast service to the terminal in the reselection target cell determined by the terminal based on the multicast broadcast service information.

Optionally, the sending the multicast broadcast service to the terminal includes:

transmitting the multicast broadcast service to the terminal in the inactive state under the condition that the reselection target cell supports the terminal to receive the multicast broadcast service in the inactive state; or alternatively, the first and second heat exchangers may be,

and under the condition that the reselection target cell does not support the terminal to receive the multicast broadcast service in the inactive state, sending the multicast broadcast service to the terminal switched to the connection state.

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

In a third aspect, embodiments of the present application further provide a terminal, including a memory, a transceiver, and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the cell reselection method provided in the first aspect as described above.

In a fourth aspect, embodiments of the present application further provide a network device, including a memory, a transceiver, and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the cell reselection method provided in the second aspect as described above.

In a fifth aspect, embodiments of the present application further provide a cell reselection apparatus, including:

the acquisition unit is used for acquiring multicast broadcast service information, wherein the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support the terminal to receive the multicast broadcast service in an inactive state, and the terminal is in the inactive state or idle state;

and the determining unit is used for determining a reselection target cell based on the multicast broadcast service information and receiving the multicast broadcast service in the reselection target cell.

In a sixth aspect, an embodiment of the present application further provides a cell reselection apparatus, including:

a first sending unit, configured to send system information and/or multicast control channel information to a terminal in an inactive state or an idle state, where the system information and/or the multicast control channel information carries multicast broadcast service information, and the multicast broadcast service information is used to determine whether a candidate cell and/or a candidate frequency point supports the terminal to receive a multicast broadcast service in the inactive state;

and the second sending unit is used for sending the multicast broadcast service to the terminal in the reselection target cell determined by the terminal based on the multicast broadcast service information.

In a seventh aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing the processor to perform the cell reselection method provided in the first aspect or the second aspect as described above.

In an eighth aspect, embodiments of the present application further provide a computer readable storage medium storing a computer program for causing a computer to perform the cell reselection method provided in the first aspect or the second aspect as described above.

In a ninth aspect, embodiments of the present application further provide a communication device storing a computer program for causing the communication device to perform the cell reselection method provided in the first aspect or the second aspect as described above.

In a tenth aspect, embodiments of the present application further provide a chip product storing a computer program for causing the chip product to perform the cell reselection method provided in the first aspect or the second aspect as described above.

According to the cell reselection method, the cell reselection device and the storage medium, for the terminal in the idle state or the inactive state, the multicast broadcast service information is acquired to judge whether the candidate cell and/or the candidate frequency point support the terminal to receive the multicast broadcast service in the inactive state, and the multicast broadcast service information is considered when the reselection target cell is determined, so that the continuity of receiving the multicast broadcast service is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the following description will briefly describe the drawings that are required to be used in the embodiments or the related technical descriptions, and it is obvious that, in the following description, the drawings are some embodiments of the present application, and other drawings may be obtained according to these drawings without any inventive effort for a person skilled in the art.

Fig. 1 is one of flow diagrams of a cell reselection method provided in an embodiment of the present application;

fig. 2 is a second flowchart of a cell reselection method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 5 is one of schematic structural diagrams of a cell reselection apparatus provided in an embodiment of the present application;

fig. 6 is a second schematic structural diagram of a cell reselection device according to an embodiment of the present application.

Detailed Description

In order to better describe the technical solutions in the embodiments of the present application, the following description will introduce related knowledge.

Unicast, multicast and broadcast are different ways of communication between network nodes, where multicast is also called multicast and broadcast is a special form of multicast.

In the related art, the process for receiving the multicast service in the connected state includes:

(1) and the terminal joins the group corresponding to the related multicast service according to the service requirement.

(2) The network provides a series of configurations to the terminals according to the conditions of resources, services and the like in the network based on the corresponding relationship between the related terminals and the groups, for example, radio Bearer (RB) configurations used by multicast services, logical channel identification (Logical Channel Identification, LCID) configurations, and other Radio resource (for example, frequency, hybrid automatic repeat request, radio network temporary identification used by control system computers in group scheduling, and the like) configurations.

(3) Based on the foregoing configuration, the terminal receives the multicast service and possibly provides some uplink feedback to the network based on the relevant configuration of the network, such as hybrid automatic repeat request (Hybri d Automatic Repeat reQuest, HARQ) feedback.

Some problems may be caused for a scheme that only supports a terminal to receive a multicast service in a connected state. For example, when the number of terminals in the network is large and the traffic is large, the terminals required to receive the related traffic are all in a connected state, so that the network resource consumption is large, and the system is blocked. For another example, the terminal is always in a connected state when receiving the multicast service, resulting in an increase in power consumption of the terminal. Therefore, if the terminal can still continue to receive the multicast broadcast service after being switched from the connection state to the non-activation state, the problem caused by the fact that the terminal is always in the connection state can be effectively relieved.

Further, when the terminal receives the multicast broadcast service in a connection state, the continuity of the multicast broadcast service reception can be ensured through the switching flow. When the terminal is in an inactive state or an idle state, there is a problem of continuity of multicast broadcast service reception. Specifically, after a terminal reselects to a certain cell or a certain frequency point, the terminal needs to switch to a connection state or can only receive a service in a unicast mode (can not receive a multicast broadcast service in any radio resource control state), and then interruption or larger time delay of the service can be caused.

In the embodiment of the application, the term "and/or" describes the association relationship of the association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in the embodiments of the present application means two or more, and other adjectives are similar thereto.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (Global System of Mobile Communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (Aeneral Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE), LTE frequency division duplex (Frequency Division Duplex, FDD), LTE time division duplex (Time Division Duplex, TDD), long term evolution-advanced (Long Term Evolution Advanced, LTE-a), universal mobile system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless Terminal Device may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), remote Station (Remote Station), access Point (Access Point), remote Terminal Device (Remote Terminal), access Terminal Device (Access Terminal), user Terminal Device (User Terminal), user Agent (User Agent), user equipment (User Device), and the embodiments of the present application are not limited.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for a terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile Communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (Evolutional Node B, eNB or e-NodeB) in a long term evolution (Long Term Evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (Next Generation System), a home evolved base station (Home evolved Node B, heNB), a Relay Node (Relay Node), a home base station (Femto), a Pico base station (Pico), and the like. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely 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.

Fig. 1 is one of flow diagrams of a cell reselection method provided in an embodiment of the present application, and as shown in fig. 1, an execution body of the method is a terminal device, where the method at least includes the following steps:

step 101, acquiring multicast broadcast service information, where the multicast broadcast service information is used to determine whether a candidate cell and/or a candidate frequency point support a terminal to receive the multicast broadcast service in an inactive state, and the terminal is in an inactive state or an idle state.

Step 102, determining a reselection target cell based on the multicast broadcast service information, and receiving the multicast broadcast service in the reselection target cell.

In particular, when the terminal is in an idle state or inactive state, cell reselection needs to be continuously performed in order to camp on a cell with higher priority/better signal quality. The network can achieve the purpose of controlling the residence of the terminal by setting the reselection priorities of different frequency points.

And acquiring multicast broadcast service information for a terminal in a radio resource control (Radio Resource Control, RRC) idle state or RRC inactive state, wherein the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point to be reselected support the terminal to receive the multicast broadcast service in the RRC inactive state when the cell reselection is determined to be needed. And then determining a reselection target cell according to the acquired multicast broadcast service information, accessing the reselection target cell, and receiving the multicast broadcast service or receiving the related configuration of the multicast broadcast service in the reselection target cell.

When the terminal reselects the cell, not only the information such as the signal quality of the candidate cell is considered, but also the multicast broadcasting service information is considered, so that the continuity of the terminal for receiving the multicast broadcasting service is improved. The multicast broadcast service information may be utilized not only when determining a reselection target cell, but also before, during, and after cell reselection.

According to the cell reselection method provided by the embodiment of the invention, for the terminal in the idle state or the inactive state, the multicast broadcast service information is acquired to judge whether the candidate cell and/or the candidate frequency point support the terminal to receive the multicast broadcast service in the inactive state, and the multicast broadcast service information is considered when the reselection target cell is determined, so that the continuity of receiving the multicast broadcast service is improved.

Optionally, the receiving multicast broadcast service includes:

Specifically, after determining to reselect the target cell, the terminal receives the multicast broadcast service and related configuration in two ways:

in one aspect, multicast broadcast services and related configurations are received in an inactive state. If the terminal determines that the reselection target cell supports the terminal to receive the multicast broadcast service in the inactive state according to the multicast broadcast service information, the terminal accesses the reselection target cell and receives the multicast broadcast service or related configuration in the inactive state. Even if the terminal is switched to the connection state due to the RRC signaling flow, the terminal can fall back to the inactive state to receive the multicast broadcast service so as to save network resources and self energy consumption.

And switching to a connection state to receive the multicast broadcast service and related configuration. If the terminal determines that the reselection target cell does not support the terminal to receive the multicast broadcast service in the inactive state according to the multicast broadcast service information, the terminal triggers switching to the connection state before or after reselection, and keeps receiving the multicast broadcast service or related configuration in the connection state after accessing the reselection target cell.

The multicast broadcast service may be a multicast broadcast service currently being received by the terminal, a multicast broadcast service of interest to the terminal, or other multicast broadcast services.

According to the cell reselection method provided by the embodiment of the invention, whether the terminal receives the multicast broadcast service in the inactive state is supported by the reselection target cell or not is judged by utilizing the multicast broadcast service information, so that whether the terminal needs to be switched to the connection state before or after reselection is determined, and the service continuity of the terminal for receiving the multicast broadcast service is improved.

and determining the reselection target cell based on the reselection priority.

Specifically, the terminal determines a reselection target cell based on multicast broadcast service system information, first determines a reselection priority of a candidate cell and/or a candidate frequency point, and then determines the reselection target cell according to the reselection priority.

When the cell reselection is performed, in addition to considering the cell signal quality, the multicast broadcast service information is also considered, and the reselection priority of the cell or the frequency point supporting the terminal to receive the specific multicast broadcast service in the inactive state is set to be higher. The specific multicast broadcast service refers to a multicast broadcast service that the terminal is receiving or is interested in.

Specifically, the multicast broadcast service that the terminal is receiving is taken as a first multicast broadcast service, and the multicast broadcast service that the terminal is interested in is taken as a second multicast broadcast service, and the first multicast broadcast service and the second multicast broadcast service are specific multicast broadcast services.

In the process of determining the reselecting target cell according to the multicast broadcast service information, firstly, judging whether the candidate frequency point supports a specific multicast broadcast service or not according to the acquired multicast broadcast service information, and whether the terminal is supported to receive the multicast broadcast service in an inactive state or not. And for the candidate frequency points supporting the first multicast broadcasting service and/or the second multicast broadcasting service and/or supporting the terminal to receive the multicast broadcasting service in the inactive state, marking the candidate frequency points as first candidate frequency points, and considering that the reselection priority of the first candidate frequency points is higher than that of other candidate frequency points, and selecting a reselection target cell from the first candidate frequency points.

Alternatively, for candidate frequency points supporting a specific multicast broadcast service, i.e. supporting the terminal to continue to receive the first multicast broadcast service and/or to receive the second multicast broadcast service, it may be set to a higher reselection priority. Alternatively, for a candidate frequency point supporting the terminal to receive the multicast broadcast service in the inactive state, it may be set to a higher reselection priority. Optionally, the candidate frequency point supporting the terminal to receive the specific multicast broadcast service in the inactive state is set as the highest reselection priority. Further description follows:

(1) for the candidate frequency points supporting the first multicast broadcast service and/or the second multicast broadcast service, the terminal in the inactive state may be supported to receive the specific multicast broadcast service, and the terminal switched to the connection state may be supported to receive the specific multicast broadcast service.

(2) For a candidate frequency point supporting the terminal to receive the multicast broadcast service in the inactive state, a first multicast broadcast service and/or a second multicast broadcast service may be supported; the first multicast broadcast service and/or the second multicast broadcast service may not be supported, but other multicast broadcast services are supported.

(3) For the candidate frequency points supporting the terminal to receive the first multicast broadcast service and/or the second multicast broadcast service in the inactive state, the terminal is supported to continuously receive the multicast broadcast service which the terminal is receiving or interested in, and the terminal is supported to keep receiving the specific multicast broadcast service in the inactive state.

(4) For candidate frequency points that do not support either the first multicast broadcast service and/or the second multicast broadcast service, nor the terminal receives a particular multicast broadcast service in an inactive state, its reselection priority may be set to the lowest priority.

For candidate frequency points supporting only a specific multicast broadcast service but not supporting a terminal to receive the multicast broadcast service in an inactive state and candidate frequency points supporting the terminal to receive the multicast broadcast service in an inactive state but not supporting the specific multicast broadcast service, a specific priority may be set according to actual service requirements of the terminal.

For example, if the terminal determines that the terminal needs to continuously receive the first multicast broadcast service currently being received, the terminal may select to reselect to a candidate frequency point supporting the first multicast broadcast service, and switch to a connection state to continuously receive the first multicast broadcast service. For another example, if the terminal determines that the terminal needs to keep receiving the multicast broadcast service in the inactive state, the terminal may select to reselect to a candidate frequency point supporting the terminal to receive the multicast broadcast service in the inactive state, and receive the multicast broadcast service in the inactive state.

The reselection priority determination procedure of the candidate cell may be cross-referenced with the reselection priority determination procedure of the candidate frequency point.

According to the cell reselection method provided by the embodiment of the application, the reselection priority of the candidate cell is evaluated in the cell reselection process, not only the signal quality of each frequency point is considered, but also the multicast broadcast service information is considered, whether the terminal is supporting to receive or interested multicast broadcast service, whether the terminal is supporting to receive the multicast broadcast service in an inactive state, and the like are used as the basis for determining the reselection priority, so that whether the terminal needs to be switched to a connection state before or after reselection is determined, and the service continuity of the terminal for receiving the multicast broadcast service is improved.

Optionally, the acquiring multicast broadcast service information includes:

Specifically, the terminal receives system information and/or multicast control channel information sent by the network device, where the system information and/or the multicast control channel information carry multicast broadcast service information. The terminal may obtain multicast broadcast service information in whole or in part from system information (e.g., system information blocks (System Information Block, SIBs)) and/or MBS control channels (e.g., multicast control channels (Multicast Broadcast Service Control Channel, MCCH)) transmitted by the network device.

For example, the terminal may receive part of the multicast broadcast service information from a certain SIB message and obtain part of the multicast broadcast service information from the MCCH.

For example, the system message may include the following information:

{ frequency Point 1, information of service A, information of service B }

{ frequency Point 2, information of service A, information of service C }

{ frequency point 3, information of service C }.

Based on the above information, the terminal can directly determine or combine with other information to determine whether a certain frequency point x supports a certain service M.

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

Specifically, the multicast broadcast information acquired by the terminal includes one or more of the following contents:

(1) the candidate cell and/or candidate frequency point information comprises cell identification, signal quality of reference signals corresponding to various frequency points and the like. Different cells can be on the same or different frequency points, namely, the reselection process can be same-frequency cell reselection or different-frequency cell reselection.

(2) Multicast broadcast service identification information. The identification information of the multicast broadcast service being received by the terminal, the identification information of the multicast broadcast service of interest to the terminal, the identification information of one or more multicast broadcast services supported by the cell and/or the frequency point, the identification information of one or more multicast broadcast services being provided by the cell and/or the frequency point, etc. may be included.

(3) And indicating information whether the candidate cell and/or the candidate frequency point support the multicast broadcast service. Indicating that the candidate cell and/or candidate decision supports multicast broadcast services, in one possible embodiment, the candidate cell supports multicast broadcast services, but does not include multicast broadcast services that the terminal is receiving or is interested in, the reselection priority of such candidate cell may be set lower.

(4) And indicating information whether the candidate cell and/or the candidate frequency point support the first multicast broadcast service being received by the terminal. For candidate cells and/or candidate frequency points supporting the multicast broadcast service being received by the terminal, it may be set to a higher reselection priority.

(5) And indicating information whether the candidate cell and/or the candidate frequency point support the second multicast broadcast service of interest to the terminal. For candidate cells and/or candidate frequency points supporting multicast broadcast services of interest to the terminal, it may be set to a higher reselection priority.

(6) Whether the candidate cell and/or the candidate frequency point is providing a first multicast broadcast service being received by the terminal in a point-to-multipoint (Point To Multipoint, PTM) manner, and whether the first multicast broadcast service supports indication information received by the inactive state terminal. For such candidate cells supporting a particular multicast broadcast service and being sent in a particular manner, a higher or even highest reselection priority may be set.

For example, the multicast broadcast information acquired by the terminal may be in the following form (Format):

{ frequency point A, cell a, multicast service 1, multicast service 2}

{ frequency point B, cell B, multicast service 2, multicast service 3}

{ frequency point C, cell C, multicast service 1, multicast service 3}.

Optionally, after the terminal decides to reselect to the reselection target cell a of the frequency point a, according to the obtained multicast broadcast service information, it is determined that the multicast service 3 that is interested in or is being received is not transmitted on the frequency point a, or the terminal is not supported to receive in the inactive state, then the terminal may perform:

after reselection, an RRC connection recovery procedure is initiated, requiring switching to a connected state to receive multicast service 3 or configuration related to multicast service 3. Or, an RRC connection recovery procedure is initiated before reselection, and a switch is made to a connected state to receive multicast service 3 or a configuration related to multicast service 3.

Optionally, the frequency point B supports the multicast service 3, but does not support the terminal to receive the multicast service 3 in the inactive state, i.e. on the frequency point B, the terminal must also switch to receive the multicast service 3 in the connected state.

Optionally, the frequency point C supports the multicast service 3, and supports the terminal to receive the multicast service 3 in the inactive state, and when the signal quality of the frequency point 3 also meets the cell reselection condition, the terminal reselects to the frequency point C, and keeps continuously receiving the multicast service 3 in the inactive state.

Fig. 2 is a second flowchart of a cell reselection method provided in the embodiment of the present application, as shown in fig. 2, where an execution body of the method is a network device, for example, a base station, and the method at least includes the following steps:

step 201, sending system information and/or multicast control channel information to a terminal in an inactive state or an idle state, wherein the system information and/or the multicast control channel information carries multicast broadcast service information, and the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support the terminal to receive the multicast broadcast service in the inactive state;

and 202, sending the multicast broadcast service to the terminal in the reselection target cell determined by the terminal based on the multicast broadcast service information.

Specifically, the network device sends the system information and/or the multicast control channel information to the terminal in the inactive state or the idle state, so that the terminal in the inactive state or the idle state can acquire the multicast broadcast information from the system information (for example, SIB information) or other messages sent in a broadcast manner, for example, MCCH information, so as to determine whether the candidate cell and/or the candidate frequency point support the terminal in the inactive state or the idle state to receive the multicast broadcast service in the inactive state according to the multicast broadcast information.

And after the terminal determines to reselect the target cell and accesses the target reselected cell, the network equipment transmits the multicast broadcast service or the multicast broadcast service related configuration to the terminal.

According to the cell reselection method provided by the embodiment of the invention, the network equipment sends the system information and/or the multicast control channel information to the terminal in the inactive state or idle state, so that the terminal can acquire the multicast broadcast service information to judge whether the candidate cell and/or the candidate frequency point support the terminal to receive the multicast broadcast service in the inactive state or not, and consider the multicast broadcast service information when determining the reselection target cell, thereby improving the continuity of receiving the multicast broadcast service.

Specifically, the network device receives the reselected target cell fed back by the terminal, and provides the terminal with the transmission of the multicast broadcast service. At this time, the terminal may keep receiving the multicast broadcast service in the inactive state, or may switch to the connected state to receive the multicast broadcast service. Whether the terminal receives the multicast broadcast service after switching to the connection state is determined by the terminal according to the acquired multicast broadcast service information of the reselected target cell and the self requirement.

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

Specifically, the multicast broadcast service information provided by the network device to the terminal includes one or more of the following:

(3) And indicating information whether the candidate cell and/or the candidate frequency point support the multicast broadcast service. Indicating that the candidate cell and/or candidate decision supports multicast broadcast services, in one possible embodiment, the candidate cell supports multicast broadcast services, but the multicast broadcast services it supports do not include multicast broadcast services that the terminal is receiving or interested in, and the reselection priority of such candidate cell is set to be lower.

(4) And indicating information whether the candidate cell and/or the candidate frequency point support the first multicast broadcast service being received by the terminal. For candidate cells and/or candidate frequency points supporting the multicast broadcast service being received by the terminal, the terminal may set it to a higher reselection priority.

(5) And indicating information whether the candidate cell and/or the candidate frequency point support the second multicast broadcast service of interest to the terminal. For candidate cells and/or candidate frequency points supporting multicast broadcast services of interest to the terminal, the terminal may set them to a higher reselection priority.

(6) Whether the candidate cell and/or the candidate frequency point is providing a first multicast broadcast service being received by the terminal in a point-to-multipoint (Point To Multipoint, PTM) manner, and whether the first multicast broadcast service supports indication information received by the inactive state terminal. For such candidate cells supporting a particular multicast broadcast service and transmitting the particular multicast broadcast service in a particular manner, the terminal may set a higher or even highest reselection priority.

It should be noted that, the above-mentioned cell reselection method using the network device as the execution body provided in the embodiment of the present application may be referred to with the embodiment of the terminal side, and the details of the same parts and beneficial effects as those of the embodiment of the terminal side in the embodiment are not described in detail herein.

The technical solutions of the embodiments of the present application are further described below by specific examples.

Example one:

for the terminal in the inactive state or idle state, the candidate cell evaluation of cell reselection is performed in the moving process, and besides the measurement evaluation of the signal quality of the candidate cell, it is required to additionally consider whether the candidate cell supports the multicast broadcast service that the terminal keeps in the RRC inactive state and the receiving terminal is receiving or the terminal is interested in.

The inactive state UE currently performs signal quality measurement of neighboring cells (cell 2 and cell 3) in the cell 1 during the movement process, and the evaluation result shows that the signal quality of both cell 2 and cell 3 meets the cell reselection condition, and since the UE receives the multicast service 1 in cell 1 at this time, the UE further evaluates whether cell 2 and cell 3 support the UE to continue to receive the multicast service 1 in the inactive state. The UE reads the system information of the cell 2 and the cell 3, and discovers that the cell 2 and the cell 1 are transmitting the multicast service 1 by using the single frequency network (Single Frequency Network, SFN), that is, the UE can continue to keep in the current state in the cell 2 to receive the multicast service 1 without performing state switching, and the cell 3 does not support the multicast service 1.

Thus, the UE will reselect to cell 2 and remain in the inactive state to continue receiving multicast service 1.

Example two:

the inactive state UE currently performs signal quality measurement of neighboring cells (cell 2 and cell 3) in the cell 1 during the moving process, and the evaluation result shows that the signal quality of both cell 2 and cell 3 meets the cell reselection condition, and since the UE receives the multicast service 1 in cell 1 at this time, the UE further evaluates whether cell 2 and cell 3 support the UE to continue to receive the multicast service 1. The UE reads the system information of the cell 2 and the cell 3, and finds that the cell 2 is transmitting the multicast service 1 in a unicast manner, and the cell 3 supports receiving the multicast service 1 in an inactive state, but does not currently broadcast the multicast service 1 (because no inactive UE needs to receive the multicast service 1 in the cell 3, the cell 3 does not broadcast the multicast service 1 in order to save air interface overhead).

After the information is obtained, the UE determines that the UE needs to continue to receive the multicast service 1, and the UE supports to receive the multicast service 1 in a connected state, then the UE reselects to the cell 2, triggers an RRC connection recovery procedure after accessing the cell 2, switches to the connected state, and notifies the cell 2 that the UE wants to receive the multicast service 1, and the subsequent cell 2 sends the multicast service 1 to the UE in a unicast manner.

Further, if the cell 2 finds that the number of UEs receiving the multicast service 1 in the current cell by unicast mode is large, the cell 2 may change the transmission mode of the multicast service 1 to broadcast, and release the UEs receiving the multicast service 1 to inactive state or idle state, and these UEs will continue to receive the multicast service 1 by broadcast mode.

Fig. 3 is a schematic structural diagram of a terminal provided in an embodiment of the present application, as shown in fig. 3, the terminal includes a memory 301, a transceiver 302, and a processor 303, where:

a memory 301 for storing a computer program; a transceiver 302 for receiving and transmitting data under the control of the processor 303.

Specifically, transceiver 302 is used to receive and transmit data under the control of processor 303.

Wherein in fig. 3, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 303 and various circuits of memory represented by memory 301, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 302 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The user interface 304 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 303 is responsible for managing the bus architecture and general processing, and the memory 301 may store data used by the processor 303 in performing operations.

Alternatively, the processor 303 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), which may also employ a multi-core architecture.

The processor is configured to execute any of the methods provided in the embodiments of the present application by invoking a computer program stored in a memory in accordance with the obtained executable instructions. The processor and the memory may also be physically separate.

A processor 303 for reading the computer program in the memory 301 and performing the following operations:

acquiring multicast broadcast service information, wherein the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support the terminal to receive the multicast broadcast service in an inactive state, and the terminal is in the inactive state or idle state;

Optionally, the processor is configured to read the computer program in the memory and execute receiving multicast broadcast service, and includes:

Optionally, the processor is configured to read the computer program in the memory and execute the determination of the reselection target cell based on the multicast broadcast service information, and includes:

and determining the reselection target cell based on the reselection priority.

Optionally, the processor is configured to read the computer program in the memory and execute to obtain multicast broadcast service information, and includes:

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

It should be noted that, the above terminal provided in this embodiment of the present application can implement all the method steps implemented in the method embodiment on the terminal side, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.

Fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present application, as shown in fig. 4, where the network device includes a memory 401, a transceiver 402, and a processor 403, where:

a memory 401 for storing a computer program; a transceiver 402 for receiving and transmitting data under the control of the processor 403.

Specifically, a transceiver 402 is used to receive and transmit data under the control of a processor 403.

Wherein in fig. 4, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 403 and various circuits of memory, represented by memory 401, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 402 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like. The processor 403 is responsible for managing the bus architecture and general processing, and the memory 401 may store data used by the processor 403 in performing operations.

The processor 403 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or the processor may employ a multi-core architecture.

A processor 403 for reading the computer program in the memory 401 and performing the following operations:

Optionally, the processor is configured to read the computer program in the memory and execute sending multicast broadcast service to the terminal, and includes:

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

It should be noted that, the network device provided in this embodiment of the present application can implement all the method steps implemented by the method embodiment on the network device side, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.

Fig. 5 is one of schematic structural diagrams of a cell reselection apparatus provided in the embodiment of the present application, and as shown in fig. 5, the apparatus is applied to a terminal in an inactive state or an idle state, and may specifically include:

an obtaining unit 501, configured to obtain multicast broadcast service information, where the multicast broadcast service information is used to determine whether a candidate cell and/or a candidate frequency point support the terminal to receive a multicast broadcast service in an inactive state;

a determining unit 502, configured to determine a reselection target cell based on the multicast broadcast service information, and receive a multicast broadcast service in the reselection target cell.

Optionally, the determining unit is further configured to:

And determining the reselection target cell based on the reselection priority.

Optionally, the determining unit is further configured to:

Optionally, the acquiring unit is further configured to:

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

Fig. 6 is a second schematic structural diagram of a cell reselection device according to an embodiment of the present application, as shown in fig. 6, where the device includes:

a first sending unit 601, configured to send system information and/or multicast control channel information to a terminal in an inactive state or an idle state, where the system information and/or the multicast control channel information carries multicast broadcast service information, and the multicast broadcast service information is used to determine whether a candidate cell and/or a candidate frequency point supports the terminal to receive a multicast broadcast service in the inactive state;

a second sending unit 602, configured to send a multicast broadcast service to the terminal in a reselection target cell determined by the terminal based on the multicast broadcast service information.

Optionally, the second sending unit is further configured to:

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

The method and the device provided in the embodiments of the present application are based on the same application conception, and since the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application, or a portion or all or part of the technical solution contributing to the related art, may be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a Processor (Processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be noted that, the above device provided in this embodiment of the present application can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.

In another aspect, embodiments of the present application further provide a processor readable storage medium storing a computer program, where the computer program is configured to cause the processor to perform the cell reselection method provided in the foregoing embodiments, for example, including:

acquiring multicast broadcast service information, wherein the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support a terminal to receive the multicast broadcast service in an inactive state, and the terminal is in the inactive state or idle state; determining a reselection target cell based on the multicast broadcast service information, and receiving the multicast broadcast service in the reselection target cell;

or alternatively, the first and second heat exchangers may be,

transmitting system information and/or multicast control channel information to a terminal in an inactive state or an idle state, wherein the system information and/or the multicast control channel information carry multicast broadcast service information, and the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support the terminal to receive the multicast broadcast service in the inactive state; and sending the multicast broadcast service to the terminal in the reselection target cell determined by the terminal based on the multicast broadcast service information.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), and the like.

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, magnetic disk storage, 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 embodiments of 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-executable instructions. These computer-executable instructions may be provided to a processor 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 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 processor-executable instructions may also be stored in a processor-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 processor-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 processor-executable 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

1. A method of cell reselection, comprising:

2. The cell reselection method of claim 1, wherein the receiving the multicast broadcast service comprises:

3. The cell reselection method of claim 1, wherein the determining a reselection target cell based on the multicast broadcast service information comprises:

And determining the reselection target cell based on the reselection priority.

4. The cell reselection method of claim 1, wherein the determining a reselection target cell based on the multicast broadcast service information comprises:

5. The method for cell reselection according to claim 1, wherein the acquiring multicast broadcast service information comprises:

6. The cell reselection method according to any of claims 1-5, wherein the multicast broadcast service information comprises at least one of:

candidate cell and/or candidate frequency point information;

Multicast broadcast service identification information;

7. A terminal comprising a memory, a transceiver, and a processor; the method is characterized in that:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

8. The terminal of claim 7, wherein the processor for reading the computer program in the memory and executing the reception of the multicast broadcast service comprises:

9. The terminal of claim 7, wherein the processor configured to read the computer program in the memory and perform determining a reselection target cell based on the multicast broadcast service information comprises:

and determining the reselection target cell based on the reselection priority.

10. The terminal of claim 7, wherein the processor configured to read the computer program in the memory and perform determining a reselection target cell based on the multicast broadcast service information comprises:

11. The terminal of claim 7, wherein the processor configured to read the computer program in the memory and perform acquiring multicast broadcast service information comprises:

12. The terminal according to any of claims 7-11, characterized in that the multicast broadcast service information comprises at least one of:

candidate cell and/or candidate frequency point information;

multicast broadcast service identification information;

13. A cell reselection apparatus, comprising:

the acquisition unit is used for acquiring multicast broadcast service information, wherein the multicast broadcast service information is used for judging whether a candidate cell and/or a candidate frequency point support a terminal to receive the multicast broadcast service in an inactive state, and the terminal is in the inactive state or idle state;

14. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program for causing a computer to execute the method of any one of claims 1 to 6.