CN116264721A

CN116264721A - Cell switching method and device

Info

Publication number: CN116264721A
Application number: CN202111535803.3A
Authority: CN
Inventors: 黄曲芳
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2023-06-16
Also published as: WO2023109791A1

Abstract

The embodiment of the application provides a cell switching method and device, wherein the method comprises the following steps: the source network equipment sends a switching request which comprises service information of XR service in the UE; the source network equipment receives switching response messages sent by at least one network equipment respectively, wherein the switching response messages comprise transmission time parameters of XR service; the network device sends a handover indication message to the UE, where the handover indication message includes the transmission time parameter of the XR service. The cell switching method and the cell switching equipment provided by the embodiment of the invention can avoid that the UE can not timely transmit XR data due to the fact that the UE transmits the XR data at the same time with the original UE in the target cell after the UE is switched to the target cell.

Description

Cell switching method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a cell switching method and cell switching equipment.

Background

The Extended Reality (XR for short) refers to an environment which is generated by computer technology and wearable equipment, is a real and Virtual combination and can interact with human and machine, is a common name of various forms such as augmented Reality (Augmented Reality for short), virtual Reality (VR for short), mixed Reality (Mix Reality for short), and the like, and can be widely applied to various fields such as entertainment, games, medical treatment, advertisement, industry, online education, engineering, and the like.

Because the XR service needs to transmit a large amount of data, and the data transmission has periodicity, that is, the transmitted data packet presents a Burst mode, the XR data of multiple User Equipments (UEs) in the same cell are preferably transmitted in a staggered manner in time, so that the XR data transmitted at the same time is prevented from exceeding the peak rate of the cell of the wireless network, and the XR data cannot be transmitted in time.

At present, after the UE is switched to the target cell, the UE is likely to transmit XR data at the same time with the original UE in the target cell, so that the UE cannot transmit the XR data in time, and the user experience is affected.

Disclosure of Invention

The embodiment of the application provides a cell switching method and device, which can avoid that after UE is switched to a target cell, XR data is transmitted with original UE in the target cell at the same time.

In a first aspect, an embodiment of the present application provides a cell handover method, where the method includes:

the method comprises the steps that source network equipment sends a switching request, wherein the switching request comprises service information of a first service in UE;

the source network equipment receives a switching response message sent by at least one network equipment, wherein the switching response message comprises a transmission time parameter of the first service;

And the source network equipment sends a switching indication message to the UE, wherein the switching indication message comprises the transmission time parameter.

In a possible implementation, the first service is an XR service, and service information of the XR service includes, but is not limited to:

the starting transmission time, data volume and transmission period of XR service, and acceptable time adjustment information of the XR service.

In a possible embodiment, the method further includes:

and the source network equipment receives a first message sent by the UE, wherein the first message comprises time adjustment information acceptable to the XR service.

In a possible embodiment, the method further includes:

the source network device receives a second message from the XR server, where the second message includes time adjustment information acceptable to the XR service.

In a possible implementation, the network device supports the UE access, and there is an intersection between a time adjustment range supporting the XR service and a time adjustment range acceptable to the XR service; the time adjustment range of the network equipment supporting the XR service is determined by the time adjustment information of the network equipment supporting the XR service, and the time adjustment range acceptable by the XR service is determined by the time adjustment information acceptable by the XR service.

In a possible embodiment, the transmission time parameter includes time adjustment information that the network device supports the XR service.

In a possible embodiment, the method further includes:

the source network device sends a notification message to a network device except for a target handover network device in the at least one network device, where the notification message is used to notify a corresponding network device to cancel a data transmission resource reserved for the UE.

the starting transmission time, data volume and transmission period of the XR service.

In a possible embodiment, the method further includes:

and the source network equipment determines target switching network equipment supporting the access of the UE in the at least one network equipment according to the time adjustment information of the XR service supported by the at least one network equipment and the time adjustment information acceptable by the XR service.

In a possible embodiment, the transmission time parameter comprises an optional transmission time period of the XR traffic in the network device.

In a possible embodiment, the method further includes:

converting the time adjustment information of the XR service supported by the network equipment into an optional transmission time period of the XR service in the network equipment, and sending the converted optional transmission time period of the XR service in the network equipment to the UE;

or converting the optional transmission time period of the XR service in the network equipment into time adjustment information of the XR service supported by the network equipment, and sending the converted time adjustment information of the XR service supported by the network equipment to the UE.

In a second aspect, the present application provides a cell handover method, the method including:

the method comprises the steps that UE receives a switching indication message sent by source network equipment, wherein the switching indication message comprises a transmission time parameter of a first service in the UE;

and the UE is switched from the current source cell to a target switching cell according to the switching indication message, and adjusts the transmission time of the first service in the target switching cell according to the transmission time parameter.

In a possible implementation manner, the first service is an XR service, and the method further includes:

The UE acquires time adjustment information acceptable to the XR service at an application layer of the XR service;

and the UE sends a first message to the source network equipment, wherein the first message comprises time adjustment information acceptable to the XR service.

In a possible embodiment, the method further includes:

the UE sends a request message to an XR server corresponding to the XR service, wherein the request message is used for acquiring time adjustment information acceptable to the XR service;

the UE receives first response information sent by the XR server, wherein the first response information comprises time adjustment information acceptable to the XR service; the first response information can be transmitted to the UE through at least one of a non-access stratum NAS signaling message and an access stratum AS signaling message;

In a possible embodiment, the method further includes:

the UE receives second response information, wherein the second response information comprises time adjustment information acceptable to the XR service; wherein the second response information includes, but is not limited to, at least one of a radio resource control layer RRC signaling message and a medium access control layer control element MAC CE message, and the XR service acceptable time adjustment information is from the XR server.

In a possible implementation manner, the handover indication message includes a cell identifier of the target handover cell; the transmission time parameter is time adjustment information of the XR service supported by the target switching cell;

the switching from the current source cell to the target switching cell comprises the following steps:

and the UE is switched to the target switching cell from the current source cell according to the cell identification of the target switching cell.

In a possible implementation manner, the handover indication message includes a cell identifier corresponding to at least one target cell, and time adjustment information of the XR service supported by the target cell, or an optional transmission time period of the XR service in the target cell;

the target cell supports the UE to access, and an intersection exists between the time adjustment range of the supported XR service and the time adjustment range acceptable by the XR service; the time adjustment range of the XR service supported by the target cell is determined by the time adjustment information of the XR service supported by the target cell, and the time adjustment range acceptable by the XR service is determined by the time adjustment information acceptable by the XR service.

In a possible embodiment, the method further includes:

when the handover indication message includes an optional transmission time period of the XR service in the target cell, the UE determines time adjustment information of the XR service supported by the target cell according to the optional transmission time period of the XR service in the target cell.

In a possible implementation manner, the UE switches from a current source cell to a target switching cell according to the switching indication message, including:

the UE selects a target cell as the target handover cell in the at least one target cell according to the time adjustment information of the XR service supported by the at least one target cell;

and the UE is switched to the target switching cell from the current source cell.

In a possible implementation manner, the UE selects a target cell as the target handover cell in the at least one target cell according to time adjustment information of the XR service supported by the at least one target cell, including:

and the UE selects a target cell with the minimum time adjustment value of the XR service supported from the at least one target cell as the target handover cell.

and the UE selects a target cell which supports the backward adjustment of the XR service and has the minimum time adjustment value from the at least one target cell as the target switching cell.

and the UE selects a target cell as the target switching cell in the at least one target cell according to the time interval indicated by the service layer or the operation maintenance management (OAM) layer of the XR service and the time adjustment information of the XR service supported by the at least one target cell.

In a possible implementation manner, the adjusting the transmission time of the first service in the target handover cell according to the transmission time parameter includes:

And the UE sends the time adjustment information of the XR service supported by the target switching cell to an application layer of the XR service, so that the application layer of the XR service and an XR server adjust the transmission time of the XR service in the target switching cell according to the time adjustment information of the XR service supported by the target switching cell.

In a third aspect, the present application provides a cell switching apparatus, including:

a sending module, configured to send a handover request, where the handover request includes service information of a first service in a user equipment UE;

a receiving module, configured to receive a handover response message sent by at least one network device, where the handover response message includes a transmission time parameter of the first service;

the sending module is further configured to send a handover indication message to the UE, where the handover indication message includes the transmission time parameter.

In a fourth aspect, the present application provides a cell handover apparatus, the apparatus comprising:

a receiving module, configured to receive a handover indication message sent by a source network device, where the handover indication message includes a transmission time parameter corresponding to a first service in the UE;

And the processing module is used for switching from the current source cell to the target switching cell according to the switching indication message, and adjusting the transmission time of the first service in the target switching cell according to the transmission time parameter.

In a fifth aspect, the present application provides a network device, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executes computer-executable instructions stored by the memory, causing the at least one processor to perform a cell handover method as provided in the first aspect.

In a sixth aspect, the present application provides a user equipment, including: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executing computer-executable instructions stored in the memory causes the at least one processor to perform a cell handover method as provided in the second aspect.

In a seventh aspect, the present application provides a computer readable storage medium having stored therein computer executable instructions that, when executed by a processor, implement the cell handover method as provided in the first aspect;

Alternatively, the cell handover method as provided in the second aspect is implemented when the processor executes the computer-executable instructions.

In an eighth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the cell handover method as provided in the first aspect;

alternatively, the computer program, when executed by a processor, implements a cell handover method as provided in the second aspect.

According to the cell switching method and the cell switching equipment provided by the embodiment of the application, when the UE performs cell switching, the service information of the XR service in the UE is combined, and each target cell can support the transmission time parameter of the XR service in the UE to select the target switching cell, meanwhile, the UE can adjust the transmission time of the XR service in the target switching cell according to the transmission time parameter, so that the problem that the UE cannot timely transmit the XR data due to the fact that the UE transmits the XR data at the same time with the original UE in the target cell after switching to the target cell can be avoided.

Drawings

Fig. 1 is a schematic architecture diagram of a data transmission system according to an embodiment of the present application;

fig. 2 is a schematic time distribution diagram of transmission XR data by multiple UEs in the same cell in a peak-shifting manner in the embodiment of the present application;

Fig. 3 is a schematic diagram of time distribution of XR data transmitted by different cells in the embodiment of the present application;

fig. 4 is a flow chart of a cell handover method according to an embodiment of the present application;

fig. 5 is a signaling interaction schematic diagram of a cell handover method provided in an embodiment of the present application;

fig. 6 is a signaling interaction schematic diagram of another cell handover method provided in an embodiment of the present application;

fig. 7 is a flowchart of another cell handover method according to an embodiment of the present application;

fig. 8 is a schematic program module of a cell switching apparatus according to an embodiment of the present application;

fig. 9 is a schematic program module diagram of a cell switching apparatus according to an embodiment of the present application;

fig. 10 is a schematic hardware structure of an electronic device according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. Furthermore, while the disclosure is presented in the context of an exemplary embodiment or embodiments, it should be appreciated that the various aspects of the disclosure may, separately, comprise a complete embodiment.

It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The term "module" as used in this application refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the function associated with that element.

The embodiments of the present application may be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio (NR) system, evolution system of NR system, LTE-based access to unlicensed spectrum, LTE-U) system over unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system over unlicensed spectrum, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), next generation communication system or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, and the like, to which the embodiments of the present application can also be applied.

Optionally, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, and a Stand Alone (SA) fabric scenario.

The frequency spectrum of the application in the embodiments of the present application is not limited. For example, embodiments of the present application may be applied to licensed spectrum as well as unlicensed spectrum.

Referring to fig. 1, fig. 1 is a schematic architecture diagram of a data transmission system according to an embodiment of the present application. The data transmission system provided in this embodiment includes a UE101 and a network device 102.

Alternatively, the UE101 can refer to various forms of user equipment, access terminals, subscriber units, subscriber stations, mobile Stations (MS), remote stations, remote terminals, mobile devices, terminal devices (terminal equipment), wireless communication devices, user agents, or user equipment. But also a cellular phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a palm top computer (Personal Digital Assistant, PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a car-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) etc., as long as the UE101 is capable of wireless communication with the network device 102.

The embodiment of the application defines a unidirectional communication link from an access network to UE as a downlink, wherein data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called as a downlink direction; and the unidirectional communication link from the UE to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called as uplink direction.

Optionally, the network device 102, i.e. public mobile communication network device, is an interface device for accessing the internet by the UE101, and is also a form of a radio Station, which refers to a radio transceiver Station for performing information transfer with the UE101 in a certain radio coverage area, and includes a Base Station (BS), which may also be referred to as a Base Station device, and is an apparatus deployed in a radio access network (Radio Access Network, RAN) to provide a wireless communication function. For example, the device for providing a base station function in the 2G network includes a base radio transceiver station (Base Transceiver Station, abbreviated as BTS), the device for providing a base station function in the 3G network includes a node B (NodeB), the device for providing a base station function in the 4G network includes an evolved NodeB (eNB), the device for providing a base station function in the wireless local area network (Wireless Local Area Networks, abbreviated as WLAN) is an Access Point (AP), the device for providing a base station function in the 5G NR includes a gNB, and a continuously evolved NodeB (ng-eNB), wherein the gNB and the UE communicate using NR technology, the ng-eNB and the UE communicate using evolved universal terrestrial radio Access network (Evolved Universal Terrestrial Radio Access, abbreviated as E-UTRA) technology, and the gNB and the ng-eNB are both connectable to the 5G core network. The network device 102 in the embodiment of the present application also includes a device that provides a base station function in a new communication system in the future, and the like.

In the embodiment of the present application, the UE101 is communicatively connected to the network device 102 through a wireless communication network, and the cell handover method in the embodiment of the present application may be performed by the UE101, may be performed by the network device 102, or may be performed by both the UE101 and the network device 102. For example, in some embodiments, the network device 102 sends a message to the UE101; after receiving the message, the UE101 performs a corresponding task item based on the notification message, and then sends a response message to the network device 102. The following will explain in detail the embodiments.

In a wireless communication network, the XR technology has the advantages of multiple visual angles, strong interactivity and the like, can provide a brand new visual experience for users, has great application value and commercial potential, and is widely applied to various fields such as entertainment, games, medical treatment, advertising, industry, online education, engineering and the like.

The XR service generates a large amount of data, and there is periodicity in data transmission, i.e., the transmitted data packet presents burst mode. Because XR data occupies a large amount of radio resources in a cell in the transmission process, the access network expects XR data of a plurality of UEs in the same cell to be transmitted in a staggered manner as far as possible, and does not expect XR data of a plurality of UEs to be transmitted through a radio interface at the same time.

In some embodiments, XR traffic typically generates 60 frames of video data for 1 second, one video frame is generated every 16.6ms, and one video frame is split into tens of IP packets due to the large amount of data in one video frame, which is required to be transmitted every 16.6ms for wireless communication networks transmitting XR traffic. Because of the limited transmission capacity of the wireless channel, packets of the same video frame can only be transmitted slowly, typically requiring 3-5ms to complete transmission over the wireless channel.

For a better understanding of the embodiments of the present application, referring to fig. 2, fig. 2 is a schematic diagram of time distribution of transmission XR data by multiple UEs in the same cell in a peak-shifting manner in the embodiments of the present application.

In fig. 2, UE1, UE2, UE3 alternately transmit XR data on time axis t.

In a wireless communication system, when a UE moves from one cell to another, a cell handover is required in order to maintain uninterrupted communication of the UE. However, in the existing cell switching process, only factors such as signal strength of the target cell, average load of the target cell and the like are considered when the target cell is selected, and XR service of the original UE in the target cell is not considered, so that after the UE is switched to the target cell, XR data is likely to be transmitted at the same time with the original UE in the target cell, and therefore the UE cannot transmit the XR data in time, and the XR service experience is reduced.

For a better understanding of the embodiments of the present application, reference is made to fig. 3, and fig. 3 is a schematic diagram illustrating a time distribution of XR data transmitted by different cells in the embodiments of the present application.

In fig. 3, there are UE2 and UE3 in potential target cell a transmitting XR data, and UE4 in potential target cell B transmitting XR data, and if the load of other traffic in these two cells is the same, the radio signal strength is the same, and when the source cell or UE selects the target cell, the target cell B will be selected because the load of the target cell B is lighter. However, after UE1 switches to the target cell B, the XR data in UE1 and the XR data in UE4 are transmitted simultaneously, so that the cell peak rate of the target cell B may be exceeded, resulting in that the XR data cannot be transmitted in time, and the user experience is affected.

In view of the above technical problems, the present application provides a cell switching method, in which when a UE performs cell switching, service information of an XR service in the UE is combined with a transmission time parameter of the XR service in the UE that can be supported by each target cell to select a target switching cell, and meanwhile, the UE can adjust a transmission time of the XR service in the target switching cell according to the transmission time parameter, so that it is possible to avoid that after the UE switches to the target cell, the UE cannot transmit XR data in time due to transmission of XR data with an original UE in the target cell at the same time.

Referring to fig. 4, fig. 4 is a flow chart of a cell handover method according to an embodiment of the present application, and in a possible implementation manner, the method includes:

s401, the source network equipment sends a switching request, wherein the switching request comprises service information of a first service in the UE.

In some embodiments, the first service is XR service.

In some embodiments, the UE may report service information of its XR service to the source network device, and after receiving a measurement report of the UE, the source network device selects one or more cells with better signal quality as target cells according to the measurement report sent by the UE, and sends a handover request to a network device corresponding to the target cells, where the handover request includes information such as a context of the UE and service information of the XR service in the UE.

In some embodiments, the UE may also not report service information of its XR service to the source network device, and when the source network device receives the handover request sent by the UE, the source network device may derive the service information of the XR service in the UE according to the history transmission record of the XR data transmitted before in the source network device.

In some embodiments, after receiving the handover request, the network device corresponding to the target cell determines whether to accommodate the UE to access according to information such as context of the UE; if the XR service can be accepted, further determining whether the transmission time of the XR service in the UE needs to be adjusted according to the service information of the XR service; if the transmission time of the XR service in the UE needs to be adjusted, the transmission time parameter of the XR service is further determined, for example, the transmission time of the XR service is adjusted forward for 2ms or adjusted backward for 3ms.

S402, the source network device receives switching response messages sent by at least one network device, wherein the switching response messages comprise the transmission time parameters of the first service.

In some embodiments, when the first service is an XR service, the transmission time parameter of the first service is the transmission time parameter of the XR service.

Optionally, the transmission time parameter of the XR service may be a transmission time adjustment value suggested by the target cell, or may be a transmission time adjustment value acceptable by the target cell, or may be an optional transmission time period in the target cell.

In some embodiments, after receiving the handover request, the network device corresponding to the target cell determines whether the transmission time adjustment information or the optional transmission time period is within an acceptable range of the XR service, and if so, the network device corresponding to the target cell replies a handover response message to the source network device, where the handover response message includes a transmission time parameter of the XR service; if not, the network equipment corresponding to the target cell replies a refusal switching message to the source network equipment.

In some embodiments, if the source network device receives the handover response messages sent by the plurality of network devices, one of the cells corresponding to the network devices is selected as the target handover cell according to the transmission time parameter included in the handover response message sent by each network device.

S403, the source network equipment sends a switching indication message to the UE, wherein the switching indication message comprises the transmission time parameter.

In some embodiments, the handover indication message may be used to instruct the UE to handover to the target handover cell, and instruct the UE to adjust a transmission time of the XR service in the target handover cell according to a transmission time parameter of the XR service corresponding to the target handover cell.

In some embodiments, after receiving the handover indication message, the UE switches from the current source cell to the target handover cell, and adjusts the transmission time of the XR service in the target handover cell according to the transmission time parameter of the XR service corresponding to the target handover cell.

Based on the description in the foregoing embodiments, in some embodiments of the present application, an access layer of a UE acquires time adjustment information acceptable to XR service, and reports the time adjustment information to a source network device.

Optionally, the UE access stratum may acquire the time adjustment information from an XR application layer in the UE, or may acquire the time adjustment information from an XR server.

In a possible implementation manner, after the UE access stratum acquires the time adjustment information from the XR application stratum, the UE access stratum reports the acquired time adjustment information to the source network device.

In another possible embodiment, the UE may obtain the time adjustment information from the XR server, where the time adjustment information may be transmitted to the UE access stratum through NAS signaling, AS signaling, and the like. In this way, the source network device cannot parse the time adjustment information, so after the UE acquires the time adjustment information, the UE needs to report the acquired time adjustment information to the source network device.

In yet another possible embodiment, when the UE obtains the time adjustment information from the XR server, the XR server may notify the source network device of the time adjustment information, and the source network device may notify the UE through RRC signaling, MAC CE, or the like. In this way, the source network device can read the time adjustment information, so that the UE does not need to report the time adjustment information to the source network device after acquiring the time adjustment information.

Optionally, the UE reports time adjustment information acceptable to XR service to the source network device, which may be reported through RRC signaling or reported through a measurement report; it can also be reported by MAC CE, RLC (Radio Link Control, radio link layer control protocol) control PDU (Protocol Data Unit ), PDCP (Packet Data Convergence Protocol, packet data convergence protocol) control PDU, SDAP (Service Data Adaptation Protocol ) control PDU.

Optionally, the XR service acceptable time adjustment value is in the range of (0, t ₀ ) Or (-0.5 t) ₀ ，0.5t ₀ ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein t is ₀ Is the transmission period of the video frame.

Optionally, the XR service acceptable time adjustment value reported by the UE to the source network device may be equal to or less than the maximum time adjustment value acquired by the UE, but not greater than the maximum time adjustment value acquired by the UE. The above/below is not positive/negative, and merely means that "the UE actually reports a time adjustment value, and needs to be within the obtained transmission time adjustment value range". For example, if the maximum time adjustment value acquired by the UE is "adjust forward for 4ms and adjust backward for 2ms", the time adjustment value actually reported by the UE must be within this range, and if the UE reports "adjust forward for 3ms and adjust backward for 3ms", the time adjustment value is out of range.

In some embodiments, the access layer of the UE may not acquire time adjustment information acceptable to the XR service, and the default XR application layer may accept any time adjustment range. In practice, for a frame rate of 60 video frames per second, one video frame is transmitted every 16.6ms, then the maximum time adjustment value is either an adjustment forward of Xms, or an adjustment backward (16.6-X) ms, where X is a positive number less than or equal to 16.6.

In some embodiments, the cell switching manner of the UE may be divided into a general switching manner and a conditional switching manner.

For a common handover manner, referring to fig. 5, fig. 5 is a signaling interaction schematic diagram of a cell handover manner provided in an embodiment of the present application. In one possible implementation manner, the cell switching manner includes:

s501, the UE sends a measurement report to the source network equipment.

In some embodiments, the measurement report may include time adjustment information acceptable to XR traffic in the UE.

S502, the source network equipment sends a switching request to at least one network equipment according to the measurement report sent by the UE.

In some embodiments, the source network device sends a handover request message to the network device, where the handover request message includes service information of the XR service.

Optionally, the service information of the XR service includes, but is not limited to, a starting transmission time of the XR service in the UE, a data volume (such as an average data volume, a maximum data volume, a minimum data volume, a data volume variance, etc.), a transmission period, and time adjustment information acceptable to the XR service.

Optionally, the service information of the XR service may not include time adjustment information acceptable to the XR service.

S503, the source network device receives the switching response messages sent by the network devices respectively.

In some embodiments, when the handover request message includes time adjustment information acceptable to the XR service, the source network device receives a handover response message sent by at least one network device; the network device supports UE access, and an intersection exists between a time adjustment range supporting XR service and a time adjustment range acceptable by the XR service.

The time adjustment information of the XR service supported by each network device may be determined by each network device according to the original XR service of the existing UE in the corresponding cell, and the starting transmission time, the data amount, and the transmission period of the XR data. The time adjustment range of the network equipment supporting the XR service is determined by the time adjustment information of the network equipment supporting the XR service; the XR service acceptable time adjustment range may be determined from the XR service acceptable time adjustment information.

In a possible implementation manner, after each network device receives the handover request message, determining whether the UE can be supported for access; if so, further determining whether the transmission time of the XR service in the UE needs to be adjusted; if the transmission time of the XR service in the UE needs to be adjusted, time adjustment information of the XR service is further determined, and if the time adjustment information needs to be adjusted forward for 2ms or backward for 3ms.

If there is an intersection between the time adjustment range determined by the network device and the time adjustment range acceptable to the XR service included in the handover request message, the network device is used as a potential network device to send a handover response message to the source network device, where the handover response message includes the time adjustment information determined by the network device. If there is no intersection between the time adjustment range determined by the network device and the time adjustment range acceptable to the XR service included in the handover request message, the network device replies a handover rejection message to the source network device.

In some embodiments, in the case that the handover request message does not include time adjustment information acceptable to the XR service, the network device gives the time adjustment information of the XR service supported by itself, and sends the time adjustment information to the source network device through a handover response message.

The time adjustment information of the XR service supported by each network device is determined by each network device according to the original XR service of the existing UE, and the starting transmission time, data volume and transmission period of the XR service.

S504, the source network equipment determines a target switching network equipment from at least one network equipment according to the transmission time parameters of the XR service corresponding to each service.

In some embodiments, in the case that the handover request message includes time adjustment information acceptable to the XR service, the source network device may select one network device from the potential network devices as the target handover network device according to the time adjustment information determined by the potential network devices.

In some embodiments, when the handover request message does not include time adjustment information acceptable to the XR service, the source network device compares the time adjustment information that each network device supports the XR service with the time adjustment information acceptable to the XR service, and if a time adjustment range that a certain network device supports the XR service has an intersection with the time adjustment range acceptable to the XR service, the network device may be used as a potential network device. After determining the potential network devices, the source network device may select one network device from the potential network devices as a target handover network device according to the time adjustment information that each potential network device supports the XR service.

Alternatively, the source network device may select, from among the potential network devices, the potential network device with the smallest time adjustment value supporting the XR service as the target switching network device.

In some embodiments, after determining the target handover network device, the source network device may further send a notification message to the unselected network device, instructing the UE not to handover to the network device, so that each unselected network device cancels the data transmission resource reserved for the UE.

S505, the source network equipment sends a switching indication message to the UE.

In some embodiments, the handover indication message includes time adjustment information of the XR service supported by the target handover network device.

The handover indication message is used for indicating the UE to be handed over to a cell corresponding to the target handover network device, and indicating the UE to adjust the transmission time of the XR service in the cell corresponding to the target handover network device according to the time adjustment information of the XR service supported by the target handover network device.

In some embodiments, the source network device may notify the UE of the time adjustment information of the XR service in the target handover cell through an RRC message; the UE may also be notified by MAC CE, RLC control PDU, PDCP control PDU, SDAP control PDU.

S506, the UE sends an adjustment instruction to the XR application layer to adjust the transmission time of XR service in the target switching network equipment.

In some embodiments, after receiving the time adjustment information of the XR service in the target switching network device, the XR application layer in the UE communicates with the XR server, so that the XR application layer and the XR server adjust the transmission time of the XR service in the cell corresponding to the target switching network device according to the time adjustment information of the XR service supported by the target switching network device.

In some embodiments, for a conditional handover manner, referring to fig. 6, fig. 6 is a signaling interaction schematic diagram of another cell handover manner provided in an embodiment of the present application. In one possible implementation manner, the cell switching manner includes:

s601, the UE sends a measurement report to the source network equipment.

S602, the source network equipment sends a switching request to at least one network equipment according to a measurement report sent by the UE.

In some embodiments, the source network device selects one or more target cells according to the measurement report sent by the UE, and sends a handover request message to the network device corresponding to the target cells, where the handover request message includes service information of the XR service.

In some embodiments, after receiving the handover request message, each network device determines whether to allow the UE to enter handover, and if so, sends a handover response message to the source network device.

S603, the source network device receives the switching response messages sent by the network devices respectively.

In some embodiments, the network devices respectively receive a handover response message sent by each network device; the network device is used for supporting the access of the UE, and the time adjustment range supporting the XR service is intersected with the time adjustment range acceptable by the XR service.

Optionally, the handover response message includes the time adjustment information, or an optional transmission period of the XR service in the corresponding network device. The time adjustment information and the optional transmission time period are determined by the network device according to the original XR service of the existing UE, and the starting transmission time, data volume and transmission period of the XR data of the XR service.

In one possible implementation, the optional transmission time period in the network device may be represented by coordinated universal time (Universal Time Coordinated, UTC). For example, the network device may notify the network device that the optional transmission period is "2021, 11, 12, 16, 18 minutes, 23 seconds, 234 ms-240 ms, once every 16 ms", and the source network device may consider the next available optional transmission period to be "2021, 11, 12, 16, 18 minutes, 23 seconds, 250 ms-256 ms".

S604, the source network equipment sends a conditional switching instruction to the UE according to the switching response message sent back by each network equipment.

In some embodiments, the handover indication message is used to instruct the UE to select one network device from the network devices as the target handover network device according to time adjustment information of the XR service supported by the network devices, or an optional transmission time period of the XR service in the corresponding network device.

In some embodiments, in the above conditional handover indication, the transmission time parameter of the XR service may be indicated to the UE in the following three manners:

mode one: the source network device informs the UE of the information received in the handover response message as it is. For example, if the switching response message received by the source network device is time adjustment information that the network device supports XR service, the time adjustment information of the XR service is indicated in the conditional switching indication; and if the switching response message received by the source network equipment is the optional transmission time period of the XR service in the network equipment, indicating the optional transmission time period of the XR service in the network equipment by the UE in the conditional switching indication.

Mode two: the source network device indicates the UE in the format of the selectable transmission time period. For example, if the switching response message received by the source network device is time adjustment information that the network device supports XR service, the time adjustment information that the network device supports XR service is converted into an optional transmission time period of the XR service in the network device and sent to the UE.

Mode three: the source network device indicates the UE in the format of the time adjustment information. For example, if the switching response message received by the source network device is the optional transmission time period of the XR service in the network device, the optional transmission time period of the XR service in the network device is converted into time adjustment information of the network device supporting the XR service, and then the time adjustment information is sent to the UE.

And S605, when the switching condition is met, the UE selects the target switching network equipment to access.

Optionally, if there is an indication of the optional transmission time period format in the conditional switch indication received by the UE, the UE converts the conditional switch indication into a time adjustment information format.

Optionally, the UE compares time adjustment information of the XR services supported by the plurality of candidate network devices, and selects a network device with the smallest absolute value of the time adjustment value as the target handover network device.

Optionally, the UE compares time adjustment information of the XR service supported by the plurality of candidate network devices, and selects a network device supporting the XR service to be adjusted backward, and having a smallest time adjustment value, as the target handover network device.

Optionally, the UE switches the network device according to the XR application layer indication, or the OAM indication (e.g., indicating that the UE selects a cell whose time adjustment value is located in a certain interval) as the target of the conditional switching.

S606, the UE sends an adjustment instruction to the XR application layer to adjust the transmission time of XR service in the target switching cell.

In some embodiments, after determining the target handover network device, the UE further determines time adjustment information of the XR service in a cell corresponding to the target handover network device after switching to the target handover network device, and notifies the XR application layer.

And after receiving the time adjustment information of the XR service in the cell corresponding to the target switching network equipment, the XR application layer in the UE communicates with the XR server so that the XR application layer and the XR server adjust the transmission time of the XR service in the cell corresponding to the target switching network equipment according to the time adjustment information of the XR service supported by the cell corresponding to the target switching network equipment.

According to the cell switching method provided by the embodiment of the invention, when the UE performs cell switching, the service information of XR service in the UE is combined, and each target cell can support the transmission time parameter of XR service in the UE to select the target switching cell, meanwhile, the UE can adjust the transmission time of XR service in the target switching cell according to the transmission time parameter, so that the problem that the UE cannot timely transmit XR data due to the fact that the UE transmits XR data at the same time with the original UE in the target cell after switching to the target cell can be avoided.

Based on the descriptions in the foregoing embodiments, a cell handover method is also provided in the embodiments of the present application, and is applied to a UE. Referring to fig. 7, fig. 7 is a flowchart of another cell handover method according to an embodiment of the present application. As shown in fig. 7, the cell switching method includes:

s701, the UE receives a switching indication message sent by a source network device, wherein the switching indication message comprises a transmission time parameter corresponding to a first service in the UE.

S702, the UE is switched from the current source cell to the target switching cell according to the switching indication message, and adjusts the transmission time of the first service in the target switching cell according to the transmission time parameter.

Optionally, the first service is an XR service.

In some embodiments, the above method further comprises:

In some embodiments, the handover indication message includes a cell identity of the target handover cell; the transmission time parameter is time adjustment information of the XR service supported by the target switching cell;

the UE is switched from a current source cell to a target switching cell according to the switching indication message, and the method comprises the following steps:

In some embodiments, the handover indication message includes a cell identifier corresponding to at least one target cell, and time adjustment information of the XR service supported by the target cell, or an optional transmission time period of the XR service in the target cell;

the target cell supports the UE to access, and an intersection exists between the time adjustment range of the supported XR service and the time adjustment range acceptable by the XR service; the time adjustment range of the target cell supporting the XR service is determined by the time adjustment information of the target cell supporting the XR service, and the time adjustment range acceptable by the XR service is determined by the time adjustment information acceptable by the XR service.

In some embodiments, the above method further comprises:

In some embodiments, the switching from the current source cell to the target switching cell includes:

In some embodiments, the UE selects a target cell as the target handover cell in the at least one target cell according to time adjustment information of the XR service supported by the at least one target cell, including:

In some embodiments, said adjusting the transmission time of said first service in said target handover cell according to said transmission time parameter comprises:

It can be understood that the cell switching method is the same as the cell switching method described in the foregoing embodiments of the figures, and the implementation principle and manner of the cell switching method are the same, and reference may be made to the description of each embodiment of the cell switching method applied to the network device, which is not repeated herein.

Based on the description in the foregoing embodiments, a cell switching apparatus is further provided in the embodiments of the present application, which is applied to a network device. Referring to fig. 8, fig. 8 is a schematic program module of a cell switching apparatus according to an embodiment of the present application. As shown in fig. 8, the cell switching apparatus includes:

a sending module 801, configured to send a handover request, where the handover request includes service information of a first service in the UE.

A receiving module 802, configured to receive a handover response message sent by at least one network device, where the handover response message includes a transmission time parameter of the first service.

The sending module 801 is further configured to send a handover indication message to the UE, where the handover indication message includes the transmission time parameter.

In a possible embodiment, the first service is an XR service, and service information of the XR service includes, but is not limited to: the starting transmission time, data volume and transmission period of XR service, and acceptable time adjustment information of the XR service.

In one possible implementation, the receiving module 802 is configured to:

and receiving a first message sent by the UE, wherein the first message comprises time adjustment information acceptable to the XR service.

In one possible implementation, the receiving module 802 is configured to:

and receiving a second message from the XR server, wherein the second message comprises time adjustment information acceptable to the XR service.

In one possible implementation, the sending module 801 is configured to:

and sending a notification message to network equipment except for the target switching network equipment in the at least one network equipment, wherein the notification message is used for notifying the corresponding network equipment to cancel the data transmission resource reserved for the UE.

In a possible embodiment, the method further comprises a processing module for:

and determining target switching network equipment supporting the access of the UE in the at least one network equipment according to the time adjustment information of the XR service supported by the at least one network equipment and the time adjustment information acceptable by the XR service.

In one possible implementation, the processing module is configured to:

the time of the network equipment supporting the XR service is adjusted, the XR service is converted into an optional transmission time period of the XR service in the network equipment, and the converted optional transmission time period of the XR service in the network equipment is sent to the UE;

Alternatively, the cell switching device may be a chip or a chip module.

It can be understood that the cell switching apparatus and the cell switching method described in the foregoing embodiments have the same implementation principle and manner, and reference may be made to the description of each embodiment of the cell switching method applied to the network device, which is not repeated herein.

Based on the descriptions in the foregoing embodiments, a cell switching apparatus is also provided in the embodiments of the present application, which is applied to a UE. Referring to fig. 9, fig. 9 is a schematic program module of a cell switching apparatus according to an embodiment of the present application.

As shown in fig. 9, the cell switching apparatus includes:

a receiving module 901, configured to receive a handover indication message sent by a source network device, where the handover indication message includes a transmission time parameter of a first service in the UE.

And a processing module 902, configured to switch from a current source cell to a target switching cell according to the switching indication message, and adjust a transmission time of the first service in the target switching cell according to the transmission time parameter.

In a possible implementation manner, the first service is an XR service, and the cell switching device further includes:

a sending module, configured to obtain time adjustment information acceptable to the XR service at an application layer of the XR service; and sending a first message to the source network equipment, wherein the first message comprises time adjustment information acceptable to the XR service.

In a possible implementation manner, the sending module is configured to:

And sending a request message to an XR server corresponding to the XR service, wherein the request message is used for acquiring time adjustment information acceptable to the XR service.

A receiving module 901, configured to receive first response information sent by the XR server, where the first response information includes time adjustment information acceptable to the XR service; the first response information can be transmitted to the UE through at least one of NAS signaling information and AS signaling information;

the sending module is configured to send a first message to the source network device, where the first message includes time adjustment information acceptable to the XR service.

In a possible implementation manner, the sending module is configured to: and sending a request message to an XR server corresponding to the XR service, wherein the request message is used for acquiring time adjustment information acceptable to the XR service.

A receiving module 901, configured to receive second response information, where the second response information includes time adjustment information acceptable to the XR service; wherein the second response information includes, but is not limited to, at least one of RRC signaling message and MAC CE message, and the XR service acceptable time adjustment information is from the XR server.

the processing module 902 is configured to: and switching from the current source cell to the target switching cell according to the cell identification of the target switching cell.

the target cell supports the UE to access, and the time adjustment range of the supported XR service has intersection with the time adjustment range acceptable by the XR service.

In one possible implementation, the processing module 902 is configured to:

selecting a target cell as the target handover cell in the at least one target cell according to the time adjustment information of the XR service supported by the at least one target cell; and switching from the current source cell to the target switching cell.

In one possible implementation, the processing module 902 is configured to:

and selecting a target cell with the smallest time adjustment value of the XR service supported from the at least one target cell as the target handover cell.

In one possible implementation, the processing module 902 is configured to:

and selecting a target cell with the minimum time adjustment value from the at least one target cell, wherein the target cell supports the XR service backward adjustment, and the target cell is used as the target switching cell.

In one possible implementation, the processing module 902 is configured to:

and selecting a target cell as the target switching cell in the at least one target cell according to the time interval indicated by the service layer or the OAM layer of the XR service and the time adjustment information of the XR service supported by the at least one target cell.

In one possible implementation, the processing module 902 is configured to:

And sending the time adjustment information of the XR service supported by the target switching cell to an application layer of the XR service, so that the application layer of the XR service and an XR server adjust the transmission time of the XR service in the target switching cell according to the time adjustment information of the XR service supported by the target switching cell.

Alternatively, the cell switching device may be a chip or a chip module.

The cell handover apparatus described in the above embodiments may include each module, which may be a software module, a hardware module, or a part of a software module and a part of a hardware module. For example, for each device or product applied to or integrated in a chip, each module included in the device or product may be implemented in hardware such as a circuit, or at least some modules may be implemented in software program, where the software program runs on a processor integrated in the chip, and the remaining (if any) some modules may be implemented in hardware such as a circuit; for each device and product applied to or integrated in the chip module, each module contained in the device and product can be realized in a hardware mode such as a circuit, different modules can be located in the same component (such as a chip and a circuit module) of the chip module or in different components, or at least part of the modules can be realized in a software program, the software program runs in a processor integrated in the chip module, and the rest (if any) of the modules can be realized in a hardware mode such as a circuit; for each device or product applied to or integrated in the terminal, the included modules may all be implemented in hardware such as a circuit, and different modules may be located in the same component (e.g. a chip, a circuit module, etc.) or different components in the terminal, or at least some modules may be implemented in a software program, where the software program runs on a processor integrated in the terminal, and the remaining (if any) some modules may be implemented in hardware such as a circuit.

Further, based on the descriptions in the above embodiments, there is also provided a network device in the embodiments of the present application, where the network device includes at least one processor and a memory; wherein the memory stores computer-executable instructions; the at least one processor executes computer-executable instructions stored in the memory to implement what has been described in the embodiments of the cell handover method as applied to the network device as described above.

Further, based on the descriptions in the above embodiments, there is also provided a user equipment in the embodiments of the present application, where the user equipment includes at least one processor and a memory; wherein the memory stores computer-executable instructions; the at least one processor executes the computer-executable instructions stored in the memory to implement what has been described in the embodiments of the cell handover method as applied to a UE as described above.

The user equipment and the network equipment provided in the present embodiment may be used to execute the technical scheme of the foregoing method embodiment, and the implementation principle and the technical effect are similar, which are not repeated herein.

For a better understanding of the embodiments of the present application, referring to fig. 10, fig. 10 is a schematic diagram of a hardware structure of an electronic device according to the embodiments of the present application. The electronic device may be the user device or the network device.

As shown in fig. 10, the electronic apparatus 100 of the present embodiment includes: a processor 1001 and a memory 1002; wherein the method comprises the steps of

Memory 1002 for storing computer-executable instructions;

the processor 1001 is configured to execute computer-executable instructions stored in the memory, so as to implement the steps executed by the user equipment in the foregoing embodiment.

Alternatively, the processor 1001 is configured to execute computer-executable instructions stored in the memory, so as to implement the steps performed by the network device in the foregoing embodiment.

Reference may be made in particular to the relevant description of the embodiments of the method described above.

Alternatively, the memory 1002 may be separate or integrated with the processor 1001.

When the memory 1002 is provided separately, the device further comprises a bus 1003 for connecting said memory 1002 and the processor 1001.

The embodiments of the present application provide a computer readable storage medium, where computer executable instructions are stored, and when executed by a processor, implement the steps performed by the user equipment in the above embodiments.

The embodiments of the present application also provide a computer readable storage medium, where computer executable instructions are stored, and when executed by a processor, implement the steps performed by the network device in the above embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present application may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The units formed by the modules can be realized in a form of hardware or a form of hardware and software functional units.

The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional module is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some of the steps of the methods described in the embodiments of the present application.

It should be understood that the above processor may be a central processing unit (english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.

The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or one type of bus.

The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (Application Specific Integrated Circuits, ASIC for short). It is also possible that the processor and the storage medium reside as discrete components in an electronic device or a master device.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of cell handover, the method comprising:

the method comprises the steps that source network equipment sends a switching request, wherein the switching request comprises service information of a first service in User Equipment (UE);

2. The method of claim 1, wherein the first service is an augmented reality XR service, and the service information of the XR service includes, but is not limited to:

the starting transmission time, data volume and transmission period of the XR service, and time adjustment information acceptable to the XR service.

3. The method as recited in claim 2, further comprising:

4. The method as recited in claim 2, further comprising:

5. The method according to any one of claim 2 to 4, wherein,

The network equipment supports the UE to access, and the intersection exists between the time adjustment range supporting the XR service and the time adjustment range acceptable by the XR service; the time adjustment range of the network equipment supporting the XR service is determined by the time adjustment information of the network equipment supporting the XR service, and the time adjustment range acceptable by the XR service is determined by the time adjustment information acceptable by the XR service.

6. The method of claim 5, wherein the step of determining the position of the probe is performed,

the transmission time parameter includes time adjustment information for the network device to support the XR service.

7. The method as recited in claim 6, further comprising:

8. The method of claim 1, wherein the first service is an XR service, and the service information of the XR service includes, but is not limited to:

9. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

10. The method as recited in claim 9, further comprising:

11. The method of claim 8, wherein the transmission time parameter comprises a selectable transmission time period of the XR traffic in the network device.

12. The method as recited in claim 11, further comprising:

13. A method of cell handover, the method comprising:

the method comprises the steps that User Equipment (UE) receives a switching indication message sent by source network equipment, wherein the switching indication message comprises a transmission time parameter of a first service in the UE;

14. The method of claim 13, wherein the first service is an augmented reality XR service, the method further comprising:

15. The method as recited in claim 14, further comprising:

16. The method as recited in claim 14, further comprising:

17. The method according to any of claims 14 to 16, wherein the handover indication message comprises a cell identity of the target handover cell; the transmission time parameter is time adjustment information of the XR service supported by the target switching cell;

18. The method according to claim 17, wherein the handover indication message includes a cell identifier corresponding to at least one target cell, and time adjustment information of the XR service supported by the target cell, or an optional transmission period of the XR service in the target cell;

the target cell supports the UE to access, and the time adjustment range of the supported XR service has intersection with the time adjustment range acceptable by the XR service; the time adjustment range of the XR service supported by the target cell is determined by the time adjustment information of the XR service supported by the target cell, and the time adjustment range acceptable by the XR service is determined by the time adjustment information acceptable by the XR service.

19. The method as recited in claim 18, further comprising:

20. The method of claim 19, wherein said switching from a currently located source cell to a target switching cell comprises:

21. The method of claim 20, wherein the UE selecting a target cell as the target handover cell in the at least one target cell based on time adjustment information of the XR service supported by the at least one target cell, comprises:

22. The method of claim 20, wherein the UE selecting a target cell as the target handover cell in the at least one target cell based on time adjustment information of the XR service supported by the at least one target cell, comprises:

23. The method of claim 20, wherein the UE selecting a target cell as the target handover cell in the at least one target cell based on time adjustment information of the XR service supported by the at least one target cell, comprises:

24. The method of claim 14, wherein said adjusting the transmission time of said first service in said target handover cell according to said transmission time parameter comprises:

25. A cell switching apparatus, the apparatus comprising:

26. A cell switching apparatus, the apparatus comprising:

27. A network device, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

The at least one processor executing computer-executable instructions stored in the memory, causing the at least one processor to perform the cell handover method of any one of claims 1 to 12.

28. A user device, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executing computer-executable instructions stored in the memory, causing the at least one processor to perform the cell handover method of any one of claims 13 to 24.

29. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor implement the cell handover method of any of claims 1 to 12;

alternatively, the cell handover method according to any of claims 13 to 24 is implemented when the processor executes the computer-executable instructions.

30. A computer program product comprising a computer program which, when executed by a processor, implements the cell handover method of any of claims 1 to 12;

Alternatively, the computer program, when executed by a processor, implements a cell handover method as claimed in any of claims 13 to 24.