WO2024114743A1 - Communication method for mobility process, and first terminal, first device and storage medium - Google Patents

Abstract

Disclosed in the present application are a communication method for a mobility process, and a first terminal, a first device and a computer-readable storage medium. The method comprises: a first device sending multicast service information of a first cell to a first terminal, wherein the first cell comprises the current resident cell of the first terminal and a neighbor cell of the current resident cell; the first terminal receiving the multicast service information of the first cell, which is sent by the first device; and the first terminal executing a mobility process on the basis of the multicast service information.

Description

Communication method, first terminal, first device and storage medium in mobile process

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to the Chinese patent application filed with the China Patent Office on December 2, 2022, with application number 202211544749.3 and application name “Communication method, first terminal, first device and storage medium in mobile process”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to but is not limited to the field of communications, and in particular to a communication method, a first terminal, a first device, and a computer-readable storage medium in a mobile process.

Background technique

The fifth generation mobile communication technology, Release 17 (R17), introduces Multicast/Broadcast Service (MBS) technology in the New Radio (NR) to support multicast and broadcast services. For multicast services, R17 only supports user equipment (UE) receiving in the connected state, and the network sends configuration to the UE through dedicated signaling of Radio Resource Control (RRC). For example, the network can provide the UE with configuration for receiving multicast data when the RRC is released.

However, for an Inactive UE, since the UE enters the Inactive state, it no longer maintains the RRC connection with the base station. Therefore, when the UE has mobility behavior, that is, a cell reselection is performed, if the cell that does not support Multicast or the Inactive state is reselected, the communication service reception will be interrupted.

Application Contents

Embodiments of the present application provide a communication method, a first terminal, a first device, and a computer-readable storage medium in a mobile process.

In a first aspect, an embodiment of the present application provides a communication method in a mobile process, which is applied to a first terminal and includes:

Receiving multicast service information of a first cell sent by a first device; wherein the first cell includes a current resident cell of the first terminal and a neighboring cell of the current resident cell;

Based on the multicast service information, a mobility procedure is performed.

In a second aspect, an embodiment of the present application provides a communication method in a mobile process, which is applied to a first device, including:

Sending multicast service information of the first cell to the first terminal;

The first cell includes a current resident cell of the first terminal and a neighboring cell of the current resident cell; The multicast service information of the first cell is used to assist the first terminal in performing a mobility process.

In a third aspect, an embodiment of the present application provides a first terminal, wherein the first terminal includes:

A first receiving module is configured to receive multicast service information of a first cell sent by a first device; wherein the first cell includes a current resident cell of the first terminal and a neighboring cell of the current resident cell;

The first processing module is configured to perform a mobility process based on the multicast service information.

In a fourth aspect, an embodiment of the present application provides a first device, wherein the first device includes:

A second sending module is configured to send multicast service information of the first cell to the first terminal;

The first cell includes the current resident cell of the first terminal and neighboring cells of the current resident cell; and the multicast service information of the first cell is used to assist the first terminal in performing a mobility process.

In a fifth aspect, an embodiment of the present application provides a first terminal, comprising a first memory and a first processor, wherein the first memory stores a computer program executable on the first processor, and the first processor implements the communication method of the above-mentioned mobile process when executing the computer program.

In a sixth aspect, an embodiment of the present application provides a first device, comprising a second memory and a second processor, wherein the second memory stores a computer program executable on the second processor, and the second processor implements the communication method of the above-mentioned mobile process when executing the computer program.

In the seventh aspect, an embodiment of the present application provides a chip to implement the communication method of the above-mentioned mobile process; the chip includes: a processor, used to call and run a computer program from a memory, so that a device equipped with the chip executes the communication method of the above-mentioned mobile process.

In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium for storing a computer program, which enables a computer to execute the communication method of the above-mentioned mobile process.

In a ninth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the communication method of the above-mentioned mobile process.

In a tenth aspect, an embodiment of the present application provides a computer program which, when executed on a computer, enables the computer to execute the communication method of the above-mentioned moving process.

It can be seen that in the present application, the first device will send the multicast service information of the first cell to the first terminal in advance. When the first terminal in a non-connected state needs to perform a mobility process, the first terminal can refer to the multicast service information of the first cell and select a suitable cell to avoid selecting a cell that does not support multicast or does not support a non-connected state, thereby reducing the risk of communication service interruption.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

FIG2 is a flow chart of a communication method for a mobile process provided in an embodiment of the present application;

FIG3 is a schematic block diagram of a first terminal provided in an embodiment of the present application;

FIG4 is a schematic block diagram of a first device provided in an embodiment of the present application;

FIG5 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG6 is a schematic structural diagram of a chip provided in an embodiment of the present application;

FIG. 7 is a schematic block diagram of a communication system provided in an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

FIG1 is a schematic diagram of a communication system according to an embodiment of the present application.

As shown in Fig. 1, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

It should be understood that the embodiments of the present application are only exemplified by the communication system 100, but the embodiments of the present application are not limited thereto. That is to say, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system, or future communication systems.

The network device 120 can be an evolved base station (Evolutional Node B, eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 can be a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

The terminal device 110 includes but is not limited to any terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

For example, the terminal device 110 may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLAN), or a wireless local loop. WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks, or terminal devices in future evolution networks, etc.

The terminal device 110 can be used for device to device (Device to Device, D2D) communication.

In the communication system 100 shown in Fig. 1, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area, and may communicate with the terminal device 110 (eg, UE) located in the coverage area.

In addition, the access network device provides services for the cell, and the terminal device 110 communicates with the access network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell may be a cell corresponding to the access network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

In addition, multiple cells can work on the same frequency on a carrier in an LTE system or a 5G system at the same time. In some special scenarios, the above-mentioned carrier and cell concepts can also be considered equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identifier of the secondary cell working on the secondary carrier are carried at the same time. In this case, the concepts of carrier and cell can be considered equivalent, for example, UE accessing a carrier is equivalent to accessing a cell.

FIG1 exemplarily shows a base station and two UEs. Optionally, the communication system 100 may include multiple base station devices and each base station may include another number of UEs within its coverage area, which is not specifically limited in the embodiments of the present application.

It should be noted that FIG. 1 is only an example of the system to which the present application is applicable. Of course, the method shown in the embodiment of the present application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in this article. The term "and/or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiment of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, B can be obtained through C; it can also mean that A and B have an association relationship. It should also be understood that the "correspondence" mentioned in the embodiment of the present application can mean that there is a direct or indirect correspondence relationship between the two, or it can mean that there is an association relationship between the two, or it can mean that the relationship between indicating and being indicated, configuring and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit the specific implementation method. For example, predefined can refer to the definition in the protocol. It should also be understood that in the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

For ease of understanding the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present application. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

FIG. 2 is a flow chart of a communication method in a mobile process provided by an embodiment of the present application. As shown in FIG. 2 , the method is applied to the communication system 100 shown in FIG. 1 , and the method includes:

Step 201: A first device sends multicast service information of a first cell to a first terminal.

The first cell includes the current resident cell of the first terminal and neighboring cells of the current resident cell.

In the embodiment of the present application, the first device, that is, the network device 120 in FIG. 1, sends the multicast service information of the first cell to the first terminal, that is, the terminal device 110 in FIG. 1, through the cell broadcast information. Of course, the first device can also send the multicast service information of the first cell to the first terminal through dedicated signaling. Exemplarily, when the first terminal registers with the first device for the network, when the first device makes an attachment response reply, the first device sends the multicast service information of the first cell to the first terminal through dedicated signaling.

In an embodiment of the present application, the first device may use a point-to-multipoint (PTM) transmission path or a point-to-point (PTP) transmission path to send multicast service information of the first cell to the first terminal.

In the embodiment of the present application, there may be one or more first terminals, and the present application does not specifically limit the number of first terminals.

In the embodiment of the present application, the signal area of the current resident cell of the first terminal can cover the current resident area of the first terminal. The current resident cell can be the cell with the best signal in the current resident area, or can be a cell that meets the resident condition among multiple cells covering the current resident position of the first terminal.

The cells that meet the residency conditions include cells that support one or more specific functions. If there are multiple cells that meet the residency conditions, the current residency cell may be any one of the multiple cells that meet the residency conditions, or may be a cell with the best signal among the multiple cells that meet the residency conditions.

Here, the present application may determine the cell with the best signal based on the parameters of the cell's signal quality. The cell's signal quality parameters may include, but are not limited to, one or more of the following: reference signal receiving power (RSRP), received signal strength indicator (RSSI), reference signal receiving quality (RSRQ), received signal level (RSL).

Exemplarily, the cell supporting one or more specific functions includes that the cell supports a multicast service, or the cell supports a terminal in a non-connected state to receive a multicast service.

In the embodiment of the present application, the neighboring cell of the current resident cell refers to a cell that overlaps with the current resident cell and is set with a switching A cell can have multiple neighboring cells.

In the embodiment of the present application, the multicast service information of the first cell includes but is not limited to one or more of the following:

Whether the neighboring cell or the current resident cell supports multicast services;

Whether the neighboring cell or the current resident cell supports the reception of multicast services by terminals in a non-connected state;

Whether the multicast broadcast service-related system messages and/or the multicast control channel (Main Control Channel, MCCH) and/or the multicast traffic channel (Multicast Traffic Channel, MTCH) of the neighboring cell or the current resident cell are sent;

Whether the neighboring cell or the current camping cell supports sending an RRC connection recovery request, and the conditions for sending an RRC connection recovery request;

A terminal in a neighboring cell or a currently resident cell and in a non-connected state receives a first type of multicast service;

The terminal in the neighboring cell or the currently camped cell and in the non-connected state receives the multicast service within the first duration.

In the embodiment of the present application, the inactive state includes but is not limited to the deactivated state (RRC_INACTIVE) and the idle state (RRC_IDLE).

In an embodiment of the present application, whether the neighboring cell or the current resident cell supports multicast services includes whether the neighboring cell or the current resident cell supports multicast services, whether the neighboring cell or the current resident cell does not support multicast services, and the types of multicast services supported or not supported by the neighboring cell or the current resident cell.

In an embodiment of the present application, whether the neighboring cell or the current resident cell supports the terminal in the non-connected state to receive the multicast service includes whether the neighboring cell or the current resident cell supports the terminal in the non-connected state to receive the multicast service, the neighboring cell or the current resident cell does not support the terminal in the non-connected state to receive the multicast service, and the neighboring cell or the current resident cell supports or does not support the type of terminal in the non-connected state to receive the multicast service.

In the embodiment of the present application, the multicast broadcast service related system message includes but is not limited to the scheduling information of the multicast broadcast service and the control information of the multicast broadcast service. Exemplarily, the frequency information used to send one or more multicast broadcast services in the cell; here, the frequency information can also be called the frequency range or frequency range information; the frequency information can include at least one of the following: frequency point, bandwidth, frequency starting position, frequency ending position, physical resource block (PRB) identifier and physical resource block number identifier.

In an embodiment of the present application, the neighboring cell or the current resident cell sends an RRC connection recovery request including that the number of packet loss of the service is greater than the maximum packet loss threshold, which triggers the sending of the RRC connection recovery request; or the packet loss rate of the service is greater than the maximum packet loss rate, which triggers the sending of the RRC connection recovery request.

In an embodiment of the present application, a terminal in a non-connected state in a neighboring cell or a currently resident cell receives a first type of multicast service, which can be understood as a terminal in a non-connected state in a neighboring cell or a currently resident cell being able to receive the first type of multicast service. The first type here may include a type corresponding to all multicast services, or may be a type corresponding to some multicast services. Among them, if the multicast service data sent by the first device includes a terminal in a non-connected state in a neighboring cell or a currently resident cell receiving a first type of multicast service, then the multicast service data sent by the first device also includes a service identifier of the first type of multicast service. Here, each multicast service has a unique service identifier.

Exemplarily, the identifier of the multicast service includes at least one of the following:

Multicast service information identifier, for example, Temporary Mobile Group Identity (TMGI-1);

Multicast service logical channel identifier, for example, MTCH-1;

Multicast service bearer identifier, for example, Data Radio Bearer-1 (DRB-1) or MBMS Point to Multipoint Radio Bearer-1 (MRB-1);

Multicast service area identification, for example, Service Area Identity (SAI);

The multicast service sending area identifier, for example, a cell list for sending the multicast service, or an area identifier for sending the multicast service over the air interface.

In an embodiment of the present application, the first duration may be a certain point in time, or a certain continuous time period, or multiple discrete time points, or multiple discrete time periods. That is to say, the neighboring cell or the currently resident cell only supports the time period/time point corresponding to the first duration, and terminals in a non-connected state can receive multicast services.

In some embodiments, the first device broadcasts the multicast service information of the first cell to the first terminal via MCCH or MTCH. When there are multiple first terminals, the multicast service information of the first cell is sent only once via MCCH or MTCH, and all terminals can receive it, effectively reducing the number of messages sent.

In some embodiments, the first device sends an RRC dedicated message carrying multicast service information of the first cell to the first terminal; the RRC dedicated message includes an RRC release message. Obviously, the present application carries the multicast service information of the first cell in the RRC release message, and when sending the RRC release message, the multicast service information of the first cell is sent at the same time, so that it can be better compatible with the existing system and reduce the cost of system transformation.

In some embodiments, the first device broadcasts a system message carrying multicast service information of the first cell to the first terminal.

Step 202: The first terminal receives multicast service information of the first cell sent by the first device.

In some embodiments, the first terminal receives multicast service information of the first cell broadcast by the first device through the MCCH or MTCH.

In some embodiments, the first terminal receives an RRC dedicated message sent by the first device and carrying multicast service information of the first cell; the RRC dedicated message includes an RRC release message.

In some embodiments, the first terminal receives a system message broadcast by the first device and carrying multicast service information of the first cell.

In an embodiment of the present application, the first terminal can select at least one transmission path from the PTP transmission path and the PTM transmission path to receive multicast service information of the first cell, that is, the present application can flexibly utilize the PTP and PTM transmission paths for multicast service transmission, and provide better quality of service (Quality of Service, QoS) guarantee for services with higher service losslessness and continuity requirements, which is beneficial to ensuring network resource efficiency and greatly improving the MBS service reception effect of the terminal on the basis of determining the system efficiency.

Step 203: The first terminal performs a mobility process based on the multicast service information.

In the embodiment of the present application, the first terminal performs a mobility process based on the multicast service information, including: the first terminal performs a mobility process based on the multicast service information; service information, to select a cell; or the first terminal reselects a cell based on the multicast service information; or the first terminal switches a cell based on the multicast service information.

It should be noted that the cell selection is that after the first terminal is turned on, or after the first terminal moves from a blind area to a coverage area of a public land mobile network (PLMN), all frequencies allowed by the PLMN will be searched, and based on the multicast service information of the first cell, a suitable cell will be selected as a service cell. It should be noted that the multicast service information of the first cell here can be received by the first terminal before it is turned on, or after the first terminal is turned on and before the cell selection is performed, or after entering the coverage area and before the cell selection is performed.

It should be noted that in order to ensure the continuity of the first terminal service, when the first terminal moves to the cell edge, the cell switching of the first terminal will be triggered; that is, the first terminal selects a suitable cell as the service cell after switching based on the multicast service information of the first cell.

It should be noted that the first terminal currently resides in the cell, that is, the current service cell, does not support multicast services. When the first terminal needs to receive multicast service data, the first terminal reselects a suitable service cell based on the multicast service information of the first cell received in advance to receive the multicast service, that is, cell reselection.

In some embodiments, since the related technology supports receiving multicast services, the first device of the present application may only send the multicast service information of the first cell to the terminals in the non-connected state, thereby effectively reducing the number of messages sent.

The first device of the present application can send multicast service information of the first cell to both terminals in a non-connected state and terminals in a connected state. In this way, when the terminal in a connected state is converted to a non-connected state and needs to perform a mobility process, that is, switching/reselecting/selecting a cell, the multicast service information of the first cell pre-received in the terminal can be directly used, without requesting the multicast service information of the first cell from the first device. In this way, the efficiency of switching/reselecting/selecting the cell is improved.

The embodiment of the present application provides a communication method for a mobile process, the method comprising: a first device sends multicast service information of a first cell to a first terminal; wherein the first cell includes the current resident cell of the first terminal and the neighboring cell of the current resident cell; the first terminal receives the multicast service information of the first cell sent by the first device; the first terminal performs a mobility process based on the multicast service information. That is to say, in the present application, the first device will send the multicast service information of the first cell to the first terminal in advance. When the first terminal in a non-connected state needs to perform a mobility process, the first terminal can refer to the multicast service information of the first cell and select a suitable cell to avoid selecting a cell that does not support multicast or does not support a non-connected state, thereby reducing the risk of communication service interruption.

In some embodiments, the first terminal in step 203 performs a mobility process based on the multicast service information, including the following steps:

Step A1: The first terminal determines a selection/reselection priority of at least one neighboring cell based on multicast service information of the neighboring cell.

In the embodiment of the present application, the first terminal receives the multicast service information of at least one neighboring cell at the frequency band of the neighboring cell based on the multicast service information of the neighboring cell. The priority of the at least one neighboring cell is adjusted, or the R criterion used to determine whether at least one neighboring cell is selected/reselected is adjusted to obtain the selection or reselection priority of at least one neighboring cell. It should be noted that different neighboring cells have different selection/reselection priorities. Here, adjusting the R criterion includes adjusting the threshold value for determining selection/reselection.

Step A2: The first terminal performs cell selection/reselection based on the selection/reselection priority of the neighboring cells.

In the embodiment of the present application, the first terminal determines the target cell set based on the selection/reselection priority of the neighboring cell, and then the first terminal selects/reselects the serving cell from the target cell set according to its own position and movement direction. Here, the target cell set for cell reselection/selection is determined, and then the target cell for cell reselection/selection is determined according to the movement of the first terminal itself, which can ensure the quality of the reselected/selected target cell, avoid reselection due to quality problems of the reselected/selected target cell, and thus improve the reselection efficiency.

In some embodiments, the method provided in the embodiments of the present application includes the following contents:

Step B1: The first terminal sends an RRC connection recovery request to the first device.

The RRC connection recovery request is used to instruct the first device to send the first data packet to the first terminal.

In the embodiment of the present application, the RRC connection resumption request includes but is not limited to RRC Resume Request and RRC Connection Resume Request.

In an embodiment of the present application, the first data packet includes a first data packet that is not received by the first terminal when the first terminal performs a mobility process and is associated with an upcoming communication service. Then, the RRC connection recovery request is used to instruct the first device to retransmit the first data packet that was not successfully received. Here, the retransmission of the unsuccessful received data packet can be performed in at least one transmission path of the PTP transmission path and the PTM transmission path.

It should be noted that the first data packet may be data that has been sent by the first device but has not been received by the first terminal, or a data packet that has not been sent by the first device and is associated with an upcoming communication service.

In some embodiments, the RRC connection recovery request includes at least one of the following information:

First indication information used to instruct the first device to establish an RRC connection with the first terminal;

Second indication information used to instruct the first device and the first terminal to perform PTP leg retransmission;

The sequence number of the first packet.

In an embodiment of the present application, the first device can establish an RRC connection with the first terminal to compensate for packet loss; or perform PTP leg retransmission with the first terminal to compensate for packet loss; or directly send the lost packet to the first terminal.

In an embodiment of the present application, the first terminal may send a request to the first device to obtain the first data packet, and the first terminal may carry the serial number (SN) of the first data packet in the request message sent, for example, the SN number of the lost packet and/or the SN number of the maximum packet loss. In this way, the first device may directly send the first data packet to the first terminal based on the serial number.

Step B2: The first device receives an RRC connection recovery request sent by the first terminal.

In the embodiment of the present application, after the first device receives the RRC connection recovery request, it can establish an RRC connection with the first terminal based on the first indication information; or retransmit the PTP leg with the first terminal based on the second indication information; or The first data packet is directly sent to the first terminal.

In an embodiment of the present application, when the number of first data packets that were not successfully received in the previous transmission is relatively small, the PTP leg retransmission method can be adopted to perform more targeted scheduling and transmission.

In an embodiment of the present application, after the first device can establish a connection with the first terminal through RRC, the state of the first terminal will be converted from a non-connected state to a connected state, and the multicast service reception configuration will be updated; wherein the configuration may include PTM configuration and/or PTP configuration.

In an embodiment of the present application, when the first device retransmits the first data packet using the PTP leg retransmission method, the state of the first terminal may not change, and the first device directly sends the first data packet; in this way, the signaling for changing the state of the first terminal is saved.

Step B3: The first device sends a first data packet to the first terminal.

The first data packet is a data packet in the multicast service of the selected/reselected cell that is not successfully sent to the first terminal; the neighboring cell includes the selected/reselected cell.

In the embodiment of the present application, the manner of sending the first data packet includes but is not limited to in-band, out-of-band, media, signaling, data, message, control plane and user plane.

In the embodiment of the present application, the first device sends a first data packet to the first terminal through a first secure channel. Here, the first secure channel may be a secure channel for data transmission between the first terminal and the first device. Exemplarily, the first terminal may use an encryption key to encrypt and/or integrity protect part or all of the first data packet and send it to the first terminal, thereby ensuring the security of the first data packet.

Step B4: The first terminal receives a first data packet sent by the first device.

In some embodiments, after cell reselection/selection, the method provided by the present application further includes the following steps:

Based on the multicast service information of the second cell, determine whether to send an RRC connection recovery request to the first device.

The second cell includes the selected/reselected cell and the currently resident cell.

In some embodiments, in order to prevent the situation where the selected/reselected cell does not support multicast services or does not support terminals in a non-connected state to receive multicast services, resulting in service interruption, the first terminal determines whether an RRC connection recovery request occurs based on the information of the selected/reselected cell after cell reselection/selection. Only if the selected/reselected cell does not support multicast services or does not support terminals in a non-connected state to receive multicast services, the first terminal will send an RRC connection recovery request to the first device to change the state of the first terminal, and the service communication of the first terminal will not be interrupted. If the selected/reselected cell supports multicast services and supports terminals in a non-connected state to receive multicast services, the first terminal determines that it is not necessary to send an RRC connection recovery request to the first device.

In some embodiments, after the first terminal reselects/chooses to enter a neighbor cell, it decides whether to initiate an RRC Resume request based on the support for multicast services broadcast by the network device corresponding to the neighbor cell; when the first terminal initiates the RRC Resume request, it may include a corresponding cause value, and the cause value indicates that the first terminal needs to obtain the PTM configuration and may indicate whether it expects to remain in the Inactive state to receive Multicast services.

In some embodiments, the first terminal in step 203 performs a mobility process based on the multicast service information, including: Next steps:

Step C1: The first terminal generates auxiliary information by using multicast service information of the current resident cell and/or neighboring cells, and sends the auxiliary information to the first device.

The auxiliary information is used to assist the first device in determining whether to send a switching instruction to the first terminal.

In some embodiments, the auxiliary information includes at least one of the following:

Movement information of the first terminal;

at least one cell to which the first terminal desires to switch;

A measurement result of the first terminal on all or part of at least one cell to which handover is desired;

The measurement result of the first terminal on all or part of other cells; the neighboring cells include the cell to be handed over and other cells;

A probability that the first terminal receives the multicast service in a non-connected state.

In an embodiment of the present application, when the first terminal, i.e., the UE, determines that a certain criterion is met, the UE generates and reports auxiliary information to the first device, i.e., the base station. Here, the rules include the S/R criteria for cell selection/reselection, and may also be the channel quality criteria specified by the protocol or issued in advance by the network. Exemplarily, the UE determines that a certain criterion is met and the UE measures that the signal quality of the current cell exceeds a certain threshold, or the UE measures that the current cell does not support multicast services at the current moment, or the UE measures that the current cell does not support terminals in a non-connected state to receive multicast services at the current moment, or the UE moves to the edge of the current cell, or the UE moves out of the signal area of the current cell. It should be noted that the UE determines that a certain rule is met, that is, the UE determines that the current serving cell needs to send a handover.

In the embodiment of the present application, the movement information of the first terminal includes the movement direction and movement speed of the first terminal.

In the embodiment of the present application, at least one cell to which the first terminal expects to switch includes any neighboring cell of the current serving cell of the first terminal.

In an embodiment of the present application, the first terminal measures all or part of the at least one cell to which it is desired to switch; here, the measurement results include but are not limited to the priority of the frequency point where the cell is located, the coverage range of the antenna, the signal quality and the speed at which the signal quality changes, etc., which are used to characterize the measurement results of the cell performance.

It should be noted that the measurement result may be a measurement result of at least one cell of all desired switching, or a measurement result of at least one cell of a certain type desired switching. Here, the at least one cell of a certain type desired switching may be multiple cells in the moving direction, or a cell capable of supporting multicast services, or a cell capable of supporting a terminal in a non-connected state to receive multicast services.

In the embodiment of the present application, the first terminal measures all or part of the other cells; the neighboring cells include the cell to be switched and other cells.

In the embodiment of the present application, the probability that the first terminal receives the multicast service in the non-connected state can be understood as the preference of the first terminal to receive the multicast service in the non-connected state; for example, if the first terminal is in the non-connected state for 90% of the time in a certain measurement period, and the first terminal will receive the multicast service only when it is in the non-connected state, then the probability of the first terminal receiving the multicast service in the non-connected state is determined to be high; if the first terminal is in the non-connected state for 90% of the time in a certain measurement period, then the probability of the first terminal receiving the multicast service in the non-connected state is determined to be high. 50%, and the first terminal will receive the multicast service only when in a connected state, then the probability of the first terminal receiving the multicast service in a non-connected state is determined to be low. It should be noted that the probability of the first terminal receiving the multicast service in a non-connected state can be determined based on the historical interaction data of the first terminal.

Step C2: The first device receives the auxiliary information sent by the first terminal.

Step C3: The first device generates a switching instruction based on the auxiliary information.

The switching instruction is used to switch the cell where the first terminal currently resides to the target cell; the neighboring cells include the target cell.

In some embodiments, the switching instruction carries at least one of the following information:

Identification information of the target cell;

Random access resources;

Configuration information of resource blocks;

The third indication information is used to indicate whether the target cell supports multicast services and/or whether it supports terminals in a non-connected state to receive multicast services.

It should be noted that the first device can first obtain the multicast service information of the neighboring cell; and generate a switching instruction based on the multicast service information and auxiliary information of the neighboring cell. That is to say, before issuing the switching instruction, the first device can use the auxiliary information sent by the first terminal and the multicast service information of the neighboring cell obtained by itself to determine the target cell to which the first terminal is to switch, generate a switching instruction, and send it to the first terminal.

Step C4: The first device sends a switching instruction to the first terminal.

In some embodiments, before the first device sends the switching instruction to the first terminal, the first device sends an RRC connection recovery request to the first terminal, wherein the RRC connection recovery request is used to instruct the first terminal to establish an RRC connection with the first device. The first terminal receives the radio resource control RRC connection recovery request sent by the first device.

Step C5: Receive a switching instruction sent by the first device.

Step C6: Perform cell switching based on the switching instruction.

In summary of the embodiments of the present application, when the UE switches to a target cell supporting multicast services based on a switching instruction, the configuration sent to the UE by the base station corresponding to the target may indicate whether the base station corresponding to the target supports and/or allows the UE to receive configuration information in the Inactive state, in addition to random access resources and RB configuration. Further, the UE accepts the MBS service after switching to the target based on the received information.

It should be noted that the configuration sent by the base station to the UE may be carried in the handover instruction, or after sending the handover instruction, another independent signaling is used to send the configuration information.

In some embodiments, the multicast service information in the terminal (Inactive UE) in the non-connected state can be obtained by reading the broadcast MCCH and MTCH; the method provided by the present application includes the following steps:

Step 1: The current serving cell can obtain one or more of the following neighboring cell information based on interaction with neighboring cells: whether Multicast is supported; whether UE is supported to receive Multicast services in Inactive state; whether MCCH and MTCH of a certain service are currently being broadcast; whether RRC recovery is supported. Resume request to obtain Multicast configuration and the conditions for initiating RRC Resume.

In the second step, the serving cell broadcasts the neighbor cell information. The broadcast of this information may be included in the system message and/or MCCH.

The third step is that the UE can increase the reselection priority of one or more neighboring cells based on the broadcast message of the serving cell.

Step 4: UE reselects a cell based on reselection priority, R criterion, etc.

Step 5. The UE may obtain whether the current serving cell can initiate RRC Resume and/or the conditions for initiating RRC Resume based on the information broadcast by the current serving cell or the previous serving cell; and decide whether to initiate RRC Resume based on whether the current serving cell can initiate RRC Resume and/or the conditions for initiating RRC Resume.

For example, when the UE reselects a neighbor cell and finds that there is packet loss in the reception of neighbor cell multicast services, it can initiate RRC Resume.

Step 6. When the UE initiates RRC Resume, it may include the corresponding cause value in the Resume request, indicating that it needs to compensate for the packet loss through the RRC connection, and/or expects to establish a PTP leg, and/or carry the SN number of its lost packet and/or the maximum packet loss SN number in the Resume request.

Step 7. If the current serving cell receives the request, it establishes an RRC connection for the UE and updates the Multicast reception configuration, which may include PTM configuration and/or PTP configuration, and can provide the UE with the corresponding lost data packets.

In some embodiments, the UE obtains the Multicast service information by obtaining the PTM configuration through RRC dedicated signaling and then receiving the MTCH; the method provided in the present application includes the following steps:

The first step is that the serving cell can indicate whether it supports the UE to receive Multicast services in the Inactive state through a broadcast message or in an RRC release message. Here, the indication is applicable to all Multicast services or per MBS session/service.

In some embodiments, the indication information further includes a time period for supporting the UE to receive Multicast services in the Inactive state, or an indication of the neighboring cell receiving Multicast in the Inactive state (all services/per service, and/or time period).

In the second step, when the UE determines that a certain criterion is met, the UE reports the auxiliary information to the base station.

In some embodiments, the auxiliary information may be based on a base station broadcast/dedicated signaling indication or protocol specification.

In some embodiments, one or more of the following information is included: UE mobility information; a cell to be selected/reselected by the UE, and/or the UE's measurement results for part or all of the cells to be selected/reselected; one or more cells preferred by the UE and/or the measurement results for part or all of the preferred cells; the UE's preference for Inactive state reception; and the UE's measurement results for all neighboring cells.

In some embodiments, the auxiliary information may be reported through a specific RRC message such as UEassistantinformation, or carried in RRCresumerequest.

In some embodiments, the criteria satisfied by the UE for reporting auxiliary information may be the S/R criteria for cell selection/reselection, or may be the channel quality criteria specified by the protocol or sent in advance by the network.

Step 3: After receiving the auxiliary information from the UE, the base station can decide whether to send a handover command to the UE. If a handover command needs to be sent, the base station will first send an RRCResume message to allow the UE to enter a connected state.

In some embodiments, the switching decision for the base station may be based on one or more of the following information: information in the UE auxiliary information; support information for MBS by multiple neighboring cells, and/or support information for sending Multicast services in the Inactive state; whether multiple neighboring cells support UE receiving multicast services in the Inactive state.

Step 4: When the serving cell switches the UE to a target cell that supports Multicast, the configuration sent by the serving cell to the UE may include, in addition to random access resources and RB configuration, information such as whether the target base station supports and/or allows the UE to receive configuration in the Inactive state;

Step 5: Based on the received information, the UE accepts the MBS service after switching to the target.

In some embodiments, the method provided by the present application comprises the following steps:

In the first step, the serving cell can indicate whether it supports the UE to receive Multicast services in the Inactive state through a broadcast message or in an RRC release message. The indication may be applicable to all Multicast services, or may be indicated per MBS session/service, and/or have a support period.

Here, the serving cell may also additionally instruct neighboring cells to receive Multicast indications in the Inactive state (all services/per service, and/or time period).

Step 2: Based on the information broadcast by the serving cell, the UE can increase the reselection priority of the corresponding cell based on the information such as support for Multicast services and/or support for receiving Multicast in Inactive state, give priority to cells that can receive Multicast in Inactive state, and determine whether to initiate RRCResumerequest. Alternatively, the UE only selects/reselects the cell based on the existing S/R criteria. When the UE reselects and enters the neighboring cell, it decides whether to initiate RRCResumerequset based on the Multicast support broadcast by the neighboring cell.

Step 3: The UE initiates an RRCResumerequest, which may include the corresponding cause value, indicating that it needs to obtain the PTM configuration and indicating whether it expects to remain in the Inactive state to receive Multicast services.

An embodiment of the present application provides a first terminal, which can be used to implement a communication method of a mobile process provided in the embodiment corresponding to FIG. 2 . As shown in FIG. 3 , the first terminal 300 includes:

The first receiving module 301 is configured to receive multicast service information of a first cell sent by a first device; wherein the first cell includes a current resident cell of the first terminal and a neighboring cell of the current resident cell;

The first processing module 302 is configured to perform a mobility process based on the multicast service information.

In other embodiments of the present application, the first processing module 302 is configured to determine the selection/reselection priority of at least one neighboring cell based on the multicast service information of the neighboring cell;

The first processing module 302 is configured to perform cell selection/reselection based on the selection/reselection priority of the neighboring cells.

In other embodiments of the present application, the first processing module 302 is configured to generate auxiliary information using multicast service information of the current resident cell and/or the neighboring cell; wherein the auxiliary information is used to assist the first device in determining whether to send a switching instruction to the first terminal;

A first sending module 303, configured to send auxiliary information to a first device;

The first receiving module 301 is configured to receive a switching instruction sent by the first device; wherein the switching instruction is used to switch the cell where the first terminal currently resides to the target cell; the neighboring cell includes the target cell;

The first processing module 302 is configured to perform cell switching based on the switching instruction.

In other embodiments of the present application, the first receiving module 301 is configured to receive a radio resource control radio resource control connection recovery request sent by the first device; wherein the radio resource control connection recovery request is used to instruct the first terminal to establish a radio resource control connection with the first device.

In other embodiments of the present application, the multicast service information of the first cell includes at least one of the following: whether the neighboring cell or the current resident cell supports multicast services; whether the neighboring cell or the current resident cell supports terminals in a non-connected state to receive multicast services; whether multicast broadcast service-related system messages and/or multicast control channels and/or multicast service channels of the neighboring cell or the current resident cell are sent; whether the neighboring cell or the current resident cell supports sending a wireless resource control connection recovery request, and the conditions for sending a wireless resource control connection recovery request; terminals in a non-connected state in the neighboring cell or the current resident cell receive a first type of multicast service; terminals in a non-connected state in the neighboring cell or the current resident cell receive multicast services within a first time period.

In other embodiments of the present application, the first sending module 303 is configured to send a radio resource control connection recovery request to the first device; wherein the radio resource control connection recovery request is used to instruct the first device to send the first data packet to the first terminal;

The first receiving module 301 is configured to receive a first data packet sent by a first device; wherein the first data packet is a data packet in a multicast service of a selected/reselected cell that is not successfully sent to a first terminal; and a neighboring cell includes a selected/reselected cell.

In other embodiments of the present application, the wireless resource control connection recovery request includes at least one of the following information: first indication information for instructing the first device and the first terminal to establish a wireless resource control connection; second indication information for instructing the first device and the first terminal to perform PTP leg retransmission; and the sequence number of the first data packet.

In other embodiments of the present application, the auxiliary information includes at least one of the following: mobility information of the first terminal; at least one cell to which the first terminal expects to switch; measurement results of the first terminal for all or part of at least one cell to which it expects to switch; measurement results of the first terminal for all or part of other cells; neighboring cells include the cell to which it expects to switch and other cells; and the probability of the first terminal receiving a multicast service in a non-connected state.

In other embodiments of the present application, the first receiving module 301 is configured to receive multicast service information of the first cell broadcast by the first device through a multicast control channel or a multicast service channel; or, to receive a wireless resource control dedicated message carrying the multicast service information of the first cell sent by the first device; the wireless resource control dedicated message includes a wireless resource control release message; or, to receive a system message carrying the multicast service information of the first cell broadcast by the first device.

In other embodiments of the present application, the first processing module 302 is configured to determine whether to send a wireless resource control connection recovery request to the first device based on multicast service information of the second cell; wherein the second cell includes the selected/reselected cell and the currently resident cell.

In other embodiments of the present application, the switching instruction carries at least one of the following information: identification information of the target cell; random access resources; configuration information of the resource block; third indication information used to indicate whether the target cell supports multicast services and/or whether it supports terminals in a non-connected state to receive multicast services.

The description of the above device embodiment is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the device embodiment of the present application, please refer to the description of the method embodiment of the present application for understanding.

It should be noted that in the embodiments of the present application, if the above-mentioned test data generation method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly reflected in the form of a software product, which is stored in a storage medium and includes several instructions for a terminal device to execute all or part of the methods of each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

An embodiment of the present application provides a first device, which can be used to implement a communication method of a mobile process provided in the embodiment corresponding to FIG. 2 . As shown in FIG. 4 , the first device 400 includes:

The second sending module 401 is configured to send multicast service information of the first cell to the first terminal; wherein the first cell includes the current resident cell of the first terminal and the neighboring cells of the current resident cell; the multicast service information of the first cell is used to assist the first terminal to perform the mobility process.

In other embodiments of the present application, the second receiving module 402 is configured to receive auxiliary information sent by the first terminal; wherein the auxiliary information is generated by the first terminal using multicast service information of the current resident cell and/or the neighboring cell; the auxiliary information is used to assist the first device in determining whether to send switching indication information to the first terminal;

The second processing module 403 is configured to generate a handover instruction based on the auxiliary information; wherein the handover instruction is used to handover the cell where the first terminal currently resides to the target cell; the neighboring cell includes the target cell;

The second sending module 401 is configured to send a switching instruction to the first terminal.

In other embodiments of the present application, the second sending module 401 is configured to send a radio resource control connection recovery request to the first terminal; wherein the radio resource control connection recovery request is used to instruct the first terminal to establish a radio resource control connection with the first device.

In other embodiments of the present application, the multicast service information of the first cell includes at least one of the following: whether the neighboring cell or the current resident cell supports multicast services; whether the neighboring cell or the current resident cell supports terminals in a non-connected state to receive multicast services; whether the multicast broadcast service-related system messages and/or multicast control channels and/or multicast service channels of the neighboring cell or the current resident cell are sent; whether the neighboring cell or the current resident cell supports sending a radio resource control connection recovery request, and the conditions for sending the radio resource control connection recovery request; a terminal in a non-connected state in a neighboring cell or the current resident cell receives a first type of multicast service; a terminal in a non-connected state in a neighboring cell or the current resident cell receives multicast services within a first time period Service.

In other embodiments of the present application, the second receiving module 402 is configured to receive a radio resource control connection recovery request sent by the first terminal; wherein the radio resource control connection recovery request is used to instruct the first device to send the first data packet to the first terminal;

The second sending module 401 is configured to send a first data packet to the first terminal; wherein the first data packet is a data packet in the multicast service of the selected/reselected cell that is not successfully sent to the first terminal; the neighboring cell includes the selected/reselected cell.

In other embodiments of the present application, the wireless resource control connection recovery request includes at least one of the following information: first indication information for instructing the first device and the first terminal to establish a wireless resource control connection; second indication information for instructing the first device and the first terminal to perform PTP leg retransmission; and the sequence number of the first data packet.

In other embodiments of the present application, the auxiliary information includes at least one of the following: mobility information of the first terminal; at least one cell to which the first terminal expects to switch; measurement results of the first terminal for all or part of at least one cell to which it expects to switch; measurement results of the first terminal for all or part of other cells; neighboring cells include the cell to which it expects to switch and other cells; and the probability of the first terminal receiving a multicast service in a non-connected state.

In other embodiments of the present application, the second sending module 401 is configured to broadcast multicast service information of the first cell to the first terminal through a multicast control channel or a multicast service channel; or, to send a wireless resource control dedicated message carrying the multicast service information of the first cell to the first terminal; the wireless resource control dedicated message includes a wireless resource control release message; or, to broadcast a system message carrying the multicast service information of the first cell to the first terminal.

In other embodiments of the present application, the switching instruction carries at least one of the following information: identification information of the target cell; random access resources; configuration information of the resource block; and third indication information configured to indicate whether the target cell supports multicast services and/or whether it supports terminals in a non-connected state to receive multicast services.

In other embodiments of the present application, the second processing module 403 is configured to obtain multicast service information of a neighboring cell; and generate a switching instruction based on the multicast service information and auxiliary information of the neighboring cell.

The description of the above device embodiment is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the device embodiment of the present application, please refer to the description of the method embodiment of the present application for understanding.

It should be noted that in the embodiment of the present application, if the above-mentioned test data generation method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application can be essentially or partly embodied in the form of a software product that contributes to the relevant technology. The computer software product is stored in a storage medium, including several instructions for a terminal device to execute all or part of the methods of each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a magnetic disk or an optical disk. In this way, the embodiment of the present application is not limited to any specific combination of hardware and software.

FIG5 is a schematic structural diagram of a communication device 500 provided in an embodiment of the present application. The communication device can be a first terminal, The communication device 500 shown in FIG5 includes a first processor 510, and the first processor 510 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in Fig. 5, the communication device 500 may further include a first memory 520. The first processor 510 may call and run a computer program from the first memory 520 to implement the method in the embodiment of the present application.

The first memory 520 may be a separate device independent of the first processor 510 , or may be integrated into the first processor 510 .

Optionally, as shown in FIG. 5 , the communication device 500 may further include a transceiver 530 , and the first processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include an antenna, and the number of the antennas may be one or more.

Optionally, the communication device 500 may specifically be the first device of the embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the first device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

Optionally, the communication device 500 may specifically be the first terminal of the embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the first terminal in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

Fig. 6 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 600 shown in Fig. 6 includes a second processor 610, and the second processor 610 can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

Optionally, as shown in Fig. 6, the chip 600 may further include a second memory 620. The second processor 610 may call and run a computer program from the second memory 620 to implement the method in the embodiment of the present application.

The second memory 620 may be a separate device independent of the second processor 610 , or may be integrated into the second processor 610 .

Optionally, the chip 600 may further include an input interface 630. The second processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

Optionally, the chip 600 may further include an output interface 640. The second processor 610 may control the output interface 640 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

Optionally, the chip can be applied to the first device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

Optionally, the chip can be applied to the first terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first terminal in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

FIG7 is a schematic block diagram of a communication system 700 provided in an embodiment of the present application. As shown in FIG7 , the communication system 700 includes a first terminal 300 and a first device 400 .

Among them, the first terminal 300 can be used to implement the corresponding functions implemented by the first terminal in the above method, and the first device 400 can be used to implement the corresponding functions implemented by the first device in the above method. For the sake of brevity, they are not repeated here.

It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit in the processor or the instruction in the form of software. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined to perform. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory, a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium can be applied to the first device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the first device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

Optionally, the computer-readable storage medium can be applied to the first terminal in the embodiment of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the first terminal in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

A computer program product includes one or more computer instructions. When a computer program instruction is loaded and executed on a computer, a process or function according to an embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that includes one or more available media integrated therein. Available media may be magnetic media (e.g., floppy disk, hard disk, tape), optical media (e.g., DVD), or semiconductor media (e.g., solid-state drive (SSD)), etc.

It should be understood that the "one embodiment" or "an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some implementations" or "some embodiments" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some implementations" or "some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

The methods disclosed in several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, magnetic disks or optical disks.

Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer storage medium. Based on such an understanding, the technical solution of the embodiment of the present application can be essentially or partly reflected in the form of a software product that contributes to the relevant technology. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

As used in the embodiments of the present application and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be noted that in each embodiment involved in the present application, all steps may be executed or part of the steps may be executed as long as a complete technical solution can be formed.

The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Industrial Applicability

The embodiment of the present application provides a communication method, a first terminal, a first device and a computer-readable storage medium for a mobile process, the method comprising: the first device sends multicast service information of a first cell to the first terminal; wherein the first cell includes the current resident cell of the first terminal and the neighboring cell of the current resident cell; receives the multicast service information of the first cell sent by the first device; and executes a mobility process based on the multicast service information. That is to say, in the present application, the first device will send the multicast service information of the first cell to the first terminal in advance. When the first terminal in a non-connected state needs to execute a mobility process, the first terminal can refer to the multicast service information of the first cell and select a suitable cell to avoid selecting a cell that does not support multicast or does not support a non-connected state, thereby reducing the risk of communication service interruption.

Claims (26)

A communication method in a mobile process, applied to a first terminal, the method comprising: Receiving multicast service information of a first cell sent by a first device; wherein the first cell includes a current resident cell of the first terminal and a neighboring cell of the current resident cell; Based on the multicast service information, a mobility procedure is performed. The method according to claim 1, wherein the performing a mobility process based on the multicast service information comprises: Determining a selection/reselection priority of at least one neighboring cell based on the multicast service information of the neighboring cell; Cell selection/reselection is performed based on the selection/reselection priority of the neighboring cells. The method according to claim 1, wherein the performing a mobility process based on the multicast service information comprises: Generate auxiliary information by using the multicast service information of the current resident cell and/or the neighboring cell and send the auxiliary information to the first device; wherein the auxiliary information is used to assist the first device in determining whether to send a switching instruction to the first terminal; receiving the switching instruction sent by the first device; wherein the switching instruction is used to switch the cell where the first terminal currently resides to a target cell; the neighboring cell includes the target cell; Based on the switching instruction, cell switching is performed. The method according to claim 3, wherein after generating the auxiliary information and sending it to the first device, the method further comprises: Receive a radio resource control connection recovery request sent by the first device; wherein the radio resource control connection recovery request is used to instruct the first terminal to establish a radio resource control connection with the first device. The method according to claim 1, wherein the multicast service information of the first cell includes at least one of the following: Whether the neighboring cell or the current resident cell supports multicast services; Whether the neighboring cell or the current resident cell supports a terminal in a non-connected state to receive a multicast service; Whether the multicast broadcast service related system message and/or the multicast control channel and/or the multicast service channel of the neighboring cell or the currently camped cell are sent; Whether the neighboring cell or the current camping cell supports sending a radio resource control connection recovery request, and conditions for sending the radio resource control connection recovery request; The terminal in the neighboring cell or the currently camped cell and in a non-connected state receives a first type of multicast service; The terminal in the neighboring cell or the currently camped cell and in a non-connected state receives the multicast service within a first duration. The method according to claim 1, wherein the method further comprises: Sending a radio resource control connection recovery request to the first device; wherein the radio resource control connection recovery request The request is used to instruct the first device to send a first data packet to the first terminal; Receive the first data packet sent by the first device; wherein the first data packet is a data packet in the multicast service of the selected/reselected cell that is not successfully sent to the first terminal; and the neighboring cell includes the selected/reselected cell. The method according to claim 6, wherein the radio resource control connection recovery request includes at least one of the following information: First indication information used to instruct the first device to establish a radio resource control connection with the first terminal; Second indication information used to instruct the first device and the first terminal to perform PTP leg retransmission; The sequence number of the first data packet. The method according to claim 3, wherein the auxiliary information includes at least one of the following: Movement information of the first terminal; at least one cell to which the first terminal desires to switch; a measurement result of the first terminal on all or part of the at least one cell to which handover is desired; The measurement result of the first terminal on all or part of other cells; the neighboring cells include the cell to be switched and the other cells; A probability that the first terminal receives a multicast service in a non-connected state. The method according to claim 1, wherein the receiving the multicast service information of the first cell sent by the first device comprises: receiving multicast service information of the first cell broadcasted by the first device through a multicast control channel or a multicast service channel; or, receiving a radio resource control dedicated message sent by the first device and carrying multicast service information of the first cell; the radio resource control dedicated message includes a radio resource control release message; or, Receive a system message broadcast by the first device and carrying multicast service information of the first cell. The method according to claim 6, wherein the method further comprises: Based on the multicast service information of the second cell, determine whether to send a radio resource control connection recovery request to the first device; wherein the second cell includes the selected/reselected cell and the currently resident cell. The method according to claim 3, wherein the switching instruction carries at least one of the following information: identification information of the target cell; Random access resources; Configuration information of resource blocks; The third indication information is used to indicate whether the target cell supports multicast services and/or whether it supports terminals in a non-connected state to receive multicast services. A communication method in a mobile process, applied to a first device, the method comprising: Sending multicast service information of the first cell to the first terminal; The first cell includes the current resident cell of the first terminal and neighboring cells of the current resident cell; and the multicast service information of the first cell is used to assist the first terminal in performing a mobility process. The method according to claim 12, wherein the method further comprises: receiving auxiliary information sent by the first terminal; wherein the auxiliary information is generated by the first terminal using the multicast service information of the current resident cell and/or the neighboring cell; and the auxiliary information is used to assist the first device in determining whether to send switching indication information to the first terminal; Based on the auxiliary information, a handover instruction is generated; wherein the handover instruction is used to switch the cell where the first terminal currently resides to a target cell; the neighboring cell includes the target cell; Sending the switching instruction to the first terminal. The method according to claim 13, wherein before sending the switching instruction to the first terminal, the method further comprises: Send a radio resource control connection recovery request to the first terminal; wherein the radio resource control connection recovery request is used to instruct the first terminal to establish a radio resource control connection with the first device. The method according to claim 12, wherein the multicast service information of the first cell includes at least one of the following: Whether the neighboring cell or the current resident cell supports multicast services; Whether the neighboring cell or the current resident cell supports a terminal in a non-connected state to receive a multicast service; Whether the multicast broadcast service related system message of the neighboring cell or the currently camped cell and/or the multicast control channel and/or the multicast service channel is sent; Whether the neighboring cell or the current camping cell supports sending a radio resource control connection recovery request, and conditions for sending the radio resource control connection recovery request; The terminal in the neighboring cell or the currently camped cell and in a non-connected state receives a first type of multicast service; The terminal in the neighboring cell or the currently camped cell and in a non-connected state receives the multicast service within a first duration. The method according to claim 12, wherein the method further comprises: receiving a radio resource control connection recovery request sent by the first terminal; wherein the radio resource control connection recovery request is used to instruct the first device to send a first data packet to the first terminal; Sending the first data packet to the first terminal; wherein the first data packet is a data packet in the multicast service of the selected/reselected cell that is not successfully sent to the first terminal; and the neighboring cell includes the selected/reselected cell. The method according to claim 16, wherein the radio resource control connection recovery request includes at least one of the following information: First indication information used to instruct the first device to establish a radio resource control connection with the first terminal; Second indication information used to instruct the first device and the first terminal to perform PTP leg retransmission; The sequence number of the first data packet. The method according to claim 13, wherein the auxiliary information includes at least one of the following: Movement information of the first terminal; at least one cell to which the first terminal desires to switch; a measurement result of the first terminal on all or part of the at least one cell to which handover is desired; The measurement result of the first terminal on all or part of other cells; the neighboring cells include the cell to be switched and the other cells; A probability that the first terminal receives a multicast service in a non-connected state. The method according to claim 12, wherein the multicast service information of the first cell sent to the first terminal comprises: Broadcasting multicast service information of the first cell to the first terminal through a multicast control channel or a multicast service channel; or, Sending a radio resource control dedicated message carrying multicast service information of the first cell to the first terminal; the radio resource control dedicated message includes a radio resource control release message; or, A system message carrying multicast service information of the first cell is broadcast to the first terminal. The method according to claim 13, wherein the switching instruction carries at least one of the following information: identification information of the target cell; Random access resources; Configuration information of resource blocks; The third indication information is used to indicate whether the target cell supports multicast services and/or whether it supports terminals in a non-connected state to receive multicast services. The method according to claim 13, wherein the generating a switching instruction based on the auxiliary information comprises: Obtaining multicast service information of the neighboring cell; The switching instruction is generated based on the multicast service information of the neighboring cell and the auxiliary information. A first terminal, comprising: A first receiving module is configured to receive multicast service information of a first cell sent by a first device; wherein the first cell includes a current resident cell of the first terminal and a neighboring cell of the current resident cell; The first processing module is configured to perform a mobility process based on the multicast service information. A first device, comprising: A second sending module is configured to send multicast service information of the first cell to the first terminal; The first cell includes the current resident cell of the first terminal and neighboring cells of the current resident cell; and the multicast service information of the first cell is used to assist the first terminal in performing a mobility process. A first terminal comprises a first memory and a first processor, wherein the first memory stores a computer program that can be run on the first processor, and when the first processor executes the computer program, the communication method of the mobile process described in any one of claims 1 to 11 is implemented. A first device comprises a second memory and a second processor, wherein the second memory stores a computer program executable on the second processor, and the second processor implements the communication method of the mobile process described in any one of claims 12 to 21 when executing the computer program. A computer-readable storage medium storing one or more programs, wherein the one or more programs can be executed by one or more processors to implement the communication method of the mobile process as described in any one of claims 1 to 11, or to implement the communication method of the mobile process as described in any one of claims 12 to 21.