CN114501570A

CN114501570A - Switching method, device and equipment based on side link relay and storage medium

Info

Publication number: CN114501570A
Application number: CN202011273480.0A
Authority: CN
Inventors: 金巴·迪·阿达姆·布巴卡
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2022-05-13
Also published as: WO2022100667A1

Abstract

The application discloses a switching method, a switching device, switching equipment and a storage medium based on side link relay, and belongs to the technical field of communication. The method comprises the following steps: under the condition that the signal strength/quality of a link between first communication equipment and second communication equipment is lower than a preset threshold, measuring a neighbor node; sending the measurement result to the second communication device; the second communication device is a side link relay (SL relay) or a base station, and the neighbor node comprises a neighbor cell and/or a neighbor side link relay of the second communication device. The method and the device realize the terminal switching under the side link relay scene, and can ensure the continuity and the service quality of the terminal service.

Description

Switching method, device and equipment based on side link relay and storage medium

Technical Field

The present application belongs to the field of communication technologies, and in particular, to a handover method, apparatus, device, and storage medium based on a sidelink relay.

Background

A Long Term Evolution (LTE) system supports sidelink (or translated into sidelink, side link, etc.) from the 12 th release version, and is used for directly performing data transmission between terminals (User Equipment, UE) without using network side Equipment.

A New Radio (NR) system of the fifth generation mobile communication (5G) can be used for a working frequency band of more than 6GHz that is not supported by LTE, and supports a larger working bandwidth, but the current NR system only supports an interface between a base station and a terminal, and does not support a Sidelink interface for direct communication between terminals, and NR handover does not support a handover procedure based on a Sidelink relay (SL relay).

Therefore, in a scenario supporting SL relay, how to implement handover is a problem to be solved.

Disclosure of Invention

An object of the embodiments of the present application is to provide a handover method, apparatus, device and storage medium based on a sidelink relay, which can solve the problem of implementing handover in a scenario supporting an SL relay.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, a handover method based on sidelink relay is provided, and is applied to a first communication device, and the method includes:

under the condition that the signal strength/quality of a link between the first communication equipment and the second communication equipment is lower than a preset threshold, measuring a neighbor node;

sending the measurement result to the second communication device;

the second communication device is a sidelink relay SL relay or a base station, and the neighbor node comprises a neighbor cell and/or a neighbor sidelink relay SL relay of the second communication device.

In a second aspect, a handover method based on sidelink relay is provided, and is applied to a second communication device, and includes:

receiving a measurement result sent by first communication equipment, and determining a target node switched by the first communication equipment based on the measurement result;

and sending a switching request to the target node, wherein the switching request at least carries the service slice information of the first communication equipment.

In a third aspect, a handover method based on a side link relay is provided, which is applied to a target node, and includes:

receiving a switching request sent by second communication equipment, wherein the switching request at least carries service slice information of the first communication equipment;

determining service slice information supporting the first communication equipment based on slice information of the first communication equipment, and sending switching receiving request information to the second communication equipment, wherein the switching receiving request information carries Random Access Channel (RACH) resources required by the first communication equipment to be switched to the target node; alternatively, the first and second electrodes may be,

and determining that the service slice information of the first communication equipment is not supported based on the slice information of the second communication equipment, and sending switching refusal request information to the second communication equipment, wherein the switching refusal request information carries the reason for refusing the switching request.

In a fourth aspect, a handover apparatus based on sidelink relay is provided, which is applied to a first communication device, and includes:

a measurement unit, configured to measure a neighbor node when signal strength/quality of a link between the first communication device and the second communication device is lower than a preset threshold;

a transmitting unit configured to transmit a measurement result to the second communication device;

In a fifth aspect, a handover apparatus based on side link relay is provided, which is applied to a second communication device, and includes:

a target node determination unit, configured to receive a measurement result sent by a first communication device, and determine a target node to which the first communication device is handed over based on the measurement result;

a handover request sending unit, configured to send a handover request to the target node, where the handover request at least carries service slice information of the first communication device.

In a sixth aspect, a handover apparatus based on sidelink relay is provided, which is applied to a target node, and includes:

a handover request receiving unit, configured to receive a handover request sent by a second communication device, where the handover request at least carries service slice information of the first communication device;

a handover request feedback unit, configured to determine, based on slice information of the handover request feedback unit, service slice information supporting the first communication device, and send handover receiving request information to the second communication device, where the handover receiving request information carries a random access channel RACH resource required for the first communication device to be handed over to the target node; alternatively, the first and second electrodes may be,

In a seventh aspect, a terminal is provided, which comprises a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect, or implementing the steps of the method according to the second aspect, or implementing the steps of the method according to the third aspect.

In an eighth aspect, a network-side device is provided, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, implements the steps of the method according to the second aspect, or implements the steps of the method according to the third aspect.

In a ninth aspect, there is provided a readable storage medium on which a program or instructions are stored, which program or instructions, when executed by a processor, carry out the steps of the method according to the first aspect, or carry out the steps of the method according to the second aspect, or carry out the steps of the method according to the third aspect.

In a tenth aspect, a chip is provided, where the chip includes a processor and a communication interface, and the communication interface is coupled to the processor, and the processor is configured to execute a terminal or network side device program or instruction, implement the method according to the second aspect, or implement the method according to the third aspect.

The switching method, device, equipment and storage medium based on the side link relay provided by the embodiment of the application realize the terminal switching under the SL relay scene, and can ensure the continuity and the service quality of the terminal service.

Drawings

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

fig. 2 is a schematic flowchart of a handover method based on sidelink relay according to an embodiment of the present disclosure;

fig. 3 is a second schematic flowchart of a handover method based on sidelink relay according to an embodiment of the present application;

fig. 4 is a third schematic flowchart of a handover method based on sidelink relay according to the embodiment of the present application;

fig. 5 is a schematic diagram of a Remote UE switching from an SL relay to a base station under the same base station according to an embodiment of the present application;

fig. 6 is a schematic diagram of a Remote UE switching from SL relay1 to SL relay 2 in the same base station according to the embodiment of the present application;

fig. 7 is a schematic diagram of a Remote UE switching from a SL relay to a base station under different base stations according to an embodiment of the present application;

fig. 8 is a schematic diagram of a Remote UE switching from SL relay1 to SL relay 2 under different base stations according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of a Remote UE switching from a base station to an SL relay under the same base station according to the embodiment of the present application;

fig. 10 is a schematic diagram of a Remote UE switching from a base station to an SL relay in different base stations according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a switching device based on a side link relay according to an embodiment of the present application;

fig. 12 is a second schematic structural diagram of a switching device based on a sidelink relay according to the embodiment of the present application;

fig. 13 is a third schematic structural diagram of a switching apparatus based on a sidelink relay according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device implementing an embodiment of the present application;

fig. 15 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application;

fig. 16 is a schematic hardware structure diagram of a network device for implementing the embodiment of the present application.

Detailed Description

The technical solutions in 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 obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used are interchangeable under appropriate circumstances such that embodiments of the application can be practiced in sequences other than those illustrated or described herein, and the terms "first" and "second" used herein generally do not denote any order, nor do they denote any order, for example, the first object may be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably in embodiments of the present application, and the described techniques may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications, such as 6 th generation (6 th generation)^thGeneration, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11, a network-side device 12, and a sidelink relay 13. Wherein, the terminal 11 may also be called a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, wherein the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a 5G Base Station (gNB) in a 5G network architecture (next generation system), a home node B, a home evolved node B, a WLAN access Point, a WiFi node, a Transmission Reception Point (TRP), or some other suitable term in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that the Base Station in the NR system is only taken as an example in the embodiment of the present application, but the specific type of the Base Station is not limited. The sidelink relay (SL relay)13 may be a UE including a relay component configured to relay information from the network-side device 12 to the terminal 11 and/or relay information from the terminal 11 to the network-side device 12. Optionally, sidelink relays 13 may include a communications component configured to facilitate sidelink communications with terminals 11. The sidelink relay 13 and/or the terminal 11 may be in a connected state with the network side device 12.

The method, apparatus, device and storage medium for handover based on sidelink relay according to the embodiments of the present application are described in detail with reference to the accompanying drawings.

In order to better understand the embodiments of the present application, the sidelink will be described first.

The design of the LTE sidelink is suitable for specific public safety affairs (emergency communication in disaster places such as fire places or earthquakes), vehicle to internet (V2X) communication and the like. The internet of vehicles communication includes various services, such as basic security type communication, advanced (automated) driving, formation, sensor expansion, and the like. Since LTE sidelink supports only broadcast communication, and is therefore mainly used for basic security class communication, other advanced V2X services with strict QoS requirements in terms of latency, reliability, etc. will be supported by NR sidelink.

The Sidelink link interface may also be referred to as a PC5 interface. The current sidelink transmission also mainly comprises broadcast (broadcast), multicast (groupcast) and unicast (unicast) transmission forms. Unicast, as the name implies, is the transmission of one to one. Multicast is a one to anyy transmission. Broadcast is also a one to any transmission, but broadcast does not have the concept that UEs belong to the same group.

Currently sidelink unicast and multicast communications support physical layer HARQ feedback mechanisms.

1) Base station scheduling Mode (Mode 1) BS schedules SL resources(s) to used by UEs for SL transmission(s) are controlled by a network side device (base station) and resources are allocated to each UE.

In the base station scheduling mode, the parameter SL-DCI-ToSL-Trans is used to define the time interval between the DCI reception instant and the first SL transmission instant of the DCI schedule. This parameter may be configured by the RRC with a list of possible values and then indicate in the DCI which value is currently used for this DCI.

2) UE autonomous Mode (Mode 2) the resources are selected autonomously by each UE.

A network slice (slice) which is a feature of the NR is described below. A network slice is a logical network that provides specific network capabilities and network characteristics. The so-called network slicing technique enables an operator to use a software means to cut out a plurality of 'virtual' end-to-end networks on a hardware infrastructure, and each virtual network is logically and completely isolated from a device to an access network, from the access network to a core network, and from the core network to a transmission network, and is respectively adapted to the technical requirements of respective services. That is to say, the network slicing technology can virtualize a plurality of logical sub-networks with different characteristics in the same 5G physical network, and satisfy the different requirements of the services (such as industrial control, automatic driving, remote medical treatment, and the like) under different 5G scenes for the technology through differentiated setting and optimization.

Network slices must possess four important features, namely virtualization, on-demand customization, end-to-end, isolation. Virtualization: the network slice is constructed based on the general infrastructure of NFV/SDN; customizing according to requirements: each network slice is adapted to different characteristic requirements of various types of services; end-to-end: the network slice is from the device to the access network, the access network to the core network and then to the transmission network to realize the network slice; isolation: each network slice, such as virtual server, network bandwidth, quality of service, and other dedicated resources are fully guaranteed. The slices are isolated from each other, and the communication of other slices cannot be influenced by the error or fault of one slice.

Fig. 2 is a schematic flowchart of a handover method based on sidelink relay according to an embodiment of the present disclosure, where an execution subject of the method is a first communication device, and the first communication device may be a terminal, such as a remote UE, and as shown in fig. 2, the method includes the following steps:

200, under the condition that the signal intensity/quality of a link between the first communication equipment and the second communication equipment is lower than a preset threshold, measuring a neighbor node;

optionally, in this embodiment of the present application, the second communication device may be a side link relay SL relay or a base station.

A link between the first communication device and the second communication device may be a Uu link between the terminal and the base station, where a link interface between the terminal and the base station is a Uu interface; the link between the first communication device and the second communication device may also be a Sidelink (SL) link between the terminal and the SL relay, and an interface of the SL link is PC 5.

And under the condition that the signal strength/quality of a link between the first communication equipment and the second communication equipment is lower than a preset threshold, the first communication equipment measures the neighbor node to obtain a measurement result.

Optionally, the terminal executes a service in an area covered by the second communication device, measures the signal strength/quality of the link between the first communication device and the second communication device, and if it is determined that the signal strength/quality of the link between the first communication device and the second communication device is lower than a preset threshold, the terminal starts to measure the neighbor node and reports the measurement result to the second communication device.

Wherein the neighbor node comprises a neighbor cell and/or a neighbor side link relay (SL relay) of the second communication device.

It is understood that the types of neighbor nodes include: cell and/or SL relay. The neighbor node has an overlapping signal coverage area with the second communication device.

It should be noted that, if the second communication device is a base station, the neighbor node includes the SL relay under the base station and/or other SL relays under neighboring base stations. The SL relay under the base station and/or other SL relays under the neighboring base station are neighboring SL relays for the second communication device at this time.

If the second communication device is an SL relay, the neighbor node includes a serving cell of the terminal, a neighboring cell, other SL relays under the same base station, and/or other SL relays under neighboring base stations. The serving cell and the neighboring cell of the terminal are both neighboring cells with respect to the second communication device at this time, and other SL relays under the same base station and other SL relays under neighboring base stations are both neighboring SL relays with respect to the second communication device at this time.

For example, the terminal performs a service in a certain base station cell, and if the signal strength/quality of a link between the terminal and the base station cell is lower than a preset threshold, the terminal starts measurement of an SL relay in the base station and/or other SL relays in neighboring base stations.

For example, a terminal performs a service under a certain SL relay, and if the signal strength/quality of an SL link between the terminal and the SL relay is lower than a preset threshold, the terminal starts measurement of a serving cell, a neighboring cell, and/or other SL relays.

The embodiment of the application does not specifically limit how the terminal measures the neighbor node.

Step 201, sending a measurement result to the second communication device;

in an embodiment of the present application, a first communication device sends a measurement result to a second communication device. And the second communication equipment receives the measurement result, determines a target node switched by the first communication equipment from the neighbor nodes according to the measurement result, and then sends a switching request to the target node, wherein the switching request at least carries service slice information of the first communication equipment, and the service slice information is used for the target node to determine whether to accept the switching request. The service slice information is slice information related to the terminal service.

It will be appreciated that the target node is one of the neighbour nodes.

In the embodiment of the present application, under the condition that the signal strength/quality of the link between the first communication device and the second communication device is lower than the preset threshold, the neighboring cell or the neighboring SL relay is measured, and the measurement result is sent to the second communication device, so that the terminal handover in the SL relay scenario is supported, and the continuity and the service quality of the terminal service can be ensured.

In one embodiment, the measurement results include slice information of the neighbor nodes. The terminal measures and reports the slice information of the neighbor node, and the second communication device can determine a node capable of supporting the terminal service from the slice information of the neighbor node and the service slice information of the terminal as a target node for terminal switching, so that the continuity and the service quality of the terminal service are ensured.

It should be noted that the terminal performs the service under the coverage of the second communication device, and the service slice information of the terminal is known to the second communication device.

The embodiment of the application realizes the support of terminal switching under the SL relay scene, and ensures the continuity and the service quality of the terminal service by utilizing the slice information.

Optionally, the measurement result includes at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

wherein the slice information includes core network slice information and/or radio access network RAN slice information.

It is understood that the measurement results include: neighbor cell measurements and/or neighbor SL relay measurements.

The neighbor cell measurement results include at least one of:

a cell ID;

cell signal strength/quality;

a cell frequency;

cell slice information;

the cell slice information includes core Network slice information and/or Radio Access Network (RAN) slice information.

Wherein the neighbor SL relay measurement comprises at least one of:

Relay ID；

SL Relay signal strength/quality;

SL relay frequency;

SL relay slice information;

the SL relay slice information includes core network slice information and/or RAN slice information.

And broadcasting the slice information supported by the SL relay on the SL link, and measuring and reporting the slice information of the SL relay by the terminal.

In some optional embodiments, the handover method based on sidelink relay further includes:

and receiving a switching command sent by the second communication equipment, releasing the connection with the second communication equipment, and initiating Radio Resource Control (RRC) connection to the target node.

Optionally, the first communication device receives a handover command sent by the second communication device.

Wherein the handover command carries a random access channel, RACH, resource required for the first communication device to handover to the target node.

The RACH resource comprises a slice related RACH resource.

Then, the first communication device releases the connection with the second communication device, and initiates a Radio Resource Control (RRC) connection to the target node.

It should be noted that, when the first communication device receives the handover command sent by the second communication device, it indicates that the target node can accept the handover request, and the target node can support the service slice information of the terminal.

In the embodiment of the present application, when the signal strength/quality of the link between the first communication device and the second communication device is lower than a preset threshold, by measuring an adjacent cell or an adjacent SL relay and sending the measurement result to the second communication device, the handover in a scenario supporting the SL relay is realized, and by using slice information, the service requirement of the remote UE can be effectively guaranteed in the handover process.

Optionally, when the second communication device is the first SL relay, the target node is one of the following items:

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station.

Optionally, when the second communication device is a first SL relay, the target node may be a serving cell of the terminal, that is, a cell under the first base station, and the terminal is switched from the SL relay to the first base station; the target node can also be other SL relays which are positioned under the same base station with the first SL relay, and the terminal is switched from the first SL relay to the second SL relay; the target node may also be a cell under a different base station, that is, the terminal is switched from the first SL relay to a cell under a second base station; the target node may also be a SL relay under different base stations, that is, the terminal is switched from the first SL relay to a third SL relay under the second base station.

Here, the first base station and the second base station are adjacent base stations, that is, the first base station and the second base station have overlapping signal coverage areas.

Optionally, when the second communication device is a first base station, the target node is one of the following items:

a first SL relay under the first base station;

a second SL relay under a second base station.

Optionally, when the second communication device is a first base station, the target node may be a first SL relay under the first base station, or may be a second SL relay under a second base station. The first base station and the second base station are adjacent base stations.

Fig. 3 is a second flowchart of a handover method based on sidelink relay according to an embodiment of the present application, where an execution subject of the method is a second communication device, and the second communication device may be a sidelink relay SL relay or a base station, as shown in fig. 3, the method includes the following steps:

step 300, receiving a measurement result sent by a first communication device, and determining a target node switched by the first communication device from the neighbor nodes based on the measurement result;

optionally, the first communication device may be a terminal.

And under the condition that the signal strength/quality of a link between the first communication equipment and the second communication equipment is lower than a preset threshold, the first communication equipment starts to measure the neighbor nodes and sends the measurement result to the second communication equipment.

And the second communication equipment receives the measurement result sent by the first communication equipment, and determines a target node switched by the first communication equipment from the neighbor nodes based on the measurement result.

The target node is one of the neighbor nodes, determined by the second communication device based on the measurement results.

Optionally, the measurement result includes at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

In an optional embodiment, the determining a target node for handover of the first communication device based on the measurement result includes:

determining a node supporting the service slice information of the first communication equipment in the neighbor nodes as a target node based on the slice information of the neighbor nodes; alternatively, the first and second electrodes may be,

determining a node supporting the service slice information of the first communication equipment in the neighbor nodes as a candidate target node based on the slice information of the neighbor nodes;

and determining the node with the optimal signal strength/quality in the candidate target nodes as the target node.

It can be understood that, if only one neighbor node among the plurality of neighbor nodes supports the traffic slice information of the first communication device, the neighbor node supporting the traffic slice information of the first communication device is taken as a target node.

And under the condition that a plurality of neighbor nodes all support the service slice information of the first communication equipment, selecting a node with the optimal signal strength/quality from the plurality of neighbor nodes supporting the service slice information of the first communication equipment as a target node.

Step 301, sending a handover request to the target node, where the handover request at least carries service slice information of the first communication device;

the second communication device sends a switching request to a target node, wherein the switching request at least carries service slice information of the first communication device, and the service slice information is used for the target node to determine whether to accept the switching request, namely the target node combines the slice information of the target node to judge whether to support the service slice information of the first communication device.

After receiving the handover request, the target node judges whether the service slice information of the first communication device is supported, and if the service slice information of the first communication device is supported, the target node feeds back information (HO ack information) for receiving the handover request to the second communication device; and if the information cannot be supported, the target node feeds back the switching refusal request information to the second communication equipment.

Receiving switching request information carrying Random Access Channel (RACH) resources required by the first communication equipment to be switched to a target node; the reject handover request information carries the reason for rejecting the handover request, such as slice information required by the non-remote UE.

In the embodiment of the application, the second communication device receives the measurement result sent by the first communication device, determines the target node switched by the first communication device based on the measurement result, and then sends a switching request to the target node, wherein the switching request at least carries service slice information of the first communication device, so that switching in a SL relay scene is supported, and continuity and service quality of a terminal service can be ensured by using the slice information.

In an optional embodiment, the handover request carries service slice information of the first communication device and slice information related to the second communication device.

When the slice information of the target node does not support the service slice information of the first communication device, in order to ensure the continuity and quality of the terminal service, the target node may determine a corresponding resource according to the slice information related to the second communication device, so as to support the terminal service.

Optionally, the handover method based on the sidelink relay further includes:

receiving switching request receiving information sent by the target node, and sending a switching command to the first communication equipment;

wherein, the information for receiving the switching request carries the Random Access Channel (RACH) resource required by the first communication device to switch to the target node, and the switching command carries the RACH resource;

alternatively, the first and second electrodes may be,

receiving switching refusal request information sent by the target node, and not sending a switching command to the first communication equipment;

wherein the handover rejection request information carries a reason for rejecting the handover request.

It can be understood that the accept handover request information is determined by the target node based on its own slice information and the service slice information of the first communication device, and the reject handover request information is determined by the target node based on its own slice information and the service slice information of the first communication device.

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station;

the sending of the handover request to the target node comprises one of:

sending a handover request to the first base station;

sending a handover request to the first base station, the handover request being forwarded by the first base station to the second SL relay;

sending a handover request to the first base station, the handover request being forwarded by the first base station to the second base station;

sending a handover request to the first base station, the handover request being forwarded by the first base station to the second base station and by the second base station to the third SL relay.

Optionally, when the second communication device is the first SL relay, the target node may be a serving cell of the terminal, that is, a cell under the first base station, and the terminal is switched from the SL relay to the first base station, and correspondingly, sends a handover request to the target node, specifically, sends a handover request to the first base station.

In one embodiment, the target node may also be another SL relay located under the same base station as the first SL relay, and the terminal is switched from the first SL relay to the second SL relay;

it should be noted that, the communication process between the first SL relay and the first SL relay needs to be forwarded through the base station;

correspondingly, a handover request is sent to the target node, specifically: sending a handover request to the first base station, the handover request being forwarded by the first base station to the second SL relay.

In one embodiment, the target node may also be a cell under a different base station, that is, the terminal is handed over from the first SL relay to a cell under a second base station;

it should be noted that, the communication process between the first SL relay and the second base station needs to be forwarded by the first base station;

correspondingly, a handover request is sent to the target node, specifically:

sending a handover request to the first base station, the handover request being forwarded by the first base station to the second base station.

In an embodiment, the target node may also be an SL relay under different base stations, that is, the terminal is switched from a first SL relay to a third SL relay under a second base station;

it should be noted that, the communication process between the first SL relay and the third SL relay needs to be forwarded through the first base station and the second base station;

correspondingly, a handover request is sent to the target node, specifically:

a first SL relay under the first base station;

a second SL relay under a second base station;

the sending of the handover request to the target node includes:

sending a handover request to the first SL relay; alternatively, the first and second electrodes may be,

sending a handover request to the second base station, the handover request being forwarded by the second base station to the second SL relay.

Optionally, when the second communication device is a first base station, the target node may be a first SL relay under the first base station;

correspondingly, the sending of the handover request to the target node specifically includes: and sending a switching request to the first SL relay.

In one embodiment, the target node may also be a second SL relay under a second base station. The first base station and the second base station are adjacent base stations;

and the terminal is switched from the first base station to a second SL relay under a second base station, and the direct communication between the first base station and the second SL relay is forwarded through the second base station.

Correspondingly, the sending of the handover request to the target node specifically includes:

Fig. 4 is a third flowchart of a slice switching method based on a sidelink relay according to the third embodiment of the present application, which is applied to a target node, where the target node may be a sidelink relay SL relay or a base station, as shown in fig. 4, the method includes the following steps:

step 400, receiving a switching request sent by a second communication device, where the switching request at least carries service slice information of the first communication device;

step 401, determining service slice information supporting the first communication device based on its own slice information, and sending handover receiving request information to the second communication device, where the handover receiving request information carries RACH resources required for the first communication device to be handed over to the target node; alternatively, the first and second electrodes may be,

The method comprises the steps that a target node receives a switching request sent by second communication equipment, wherein the switching request at least carries service slice information of first communication equipment, whether the service slice information of the first communication equipment is supported or not is judged based on the slice information of the target node, if the target node determines that network resources of the target node can support the service slice information of the first communication equipment, switching request receiving information is sent to the second communication equipment, the switching request receiving information carries random access channel RACH resources required by the first communication equipment to be switched to the target node, and the random access channel RACH resources comprise RACH resources related to slices.

And if the target node determines that the network resource of the target node can not support the service slice information of the first communication equipment, sending handover rejection request information to the second communication equipment, wherein the handover rejection request information carries the reason for rejecting the handover request.

The method and the device realize the support of terminal switching under the side link relay scene, and can ensure the continuity and the service quality of the terminal service by utilizing the slice information.

The handover method based on sidelink relay provided by the embodiment of the present application is further elaborated by fig. 5-10.

Fig. 5 is a schematic diagram of a Remote UE switching from a SL relay to a base station under the same base station according to an embodiment of the present application. As shown in fig. 5, the remote UE does traffic in the SL relay. When the signal of the SL link is lower than a certain threshold, the remote UE starts measuring neighbor nodes including a base station cell and/or other SL relays, measures and reports the measurement result to the SL relays (on the SL link). The SL relay selects a target node for Handover (HO) of the remote UE, such as a cell under the first base station gNB, according to the measurement result reported by the remote UE.

When the SL relay selects a base station cell as a switching target, the SL relay sends a switching request (HO req) to the base station, wherein the switching request at least carries the service slice information of the remote UE, and the service slice information is used for the base station to determine whether to accept the switching request.

After receiving the handover request, the base station determines whether the service slice information of the remote UE is supported, if so, the base station feeds back information (HO ack information) of accepting the handover request to the SL relay, and if not, the base station feeds back information of rejecting the handover request to the SL relay. Receiving switching request information carrying random access channel RACH resources required by the remote UE to be switched to the base station; the reject handover request information carries the reason for rejecting the handover request, such as slice information required by the non-remote UE.

And if the SL relay receives the information (HO ack information) of receiving the switching request, sending an HO command to the remote UE, wherein the HO command carries the RACH resources of the random access channel required by the switching of the remote UE to the base station cell.

When the remote UE receives the HO command sent by the SL relay, the remote UE releases the SL connection and initiates RRC connection with the base station.

Fig. 6 is a schematic diagram of a Remote UE switching from SL relay1 to SL relay 2 in the same base station according to the embodiment of the present application. As shown in fig. 6, the remote UE is doing traffic at SL relay 1. When the signal of the SL relay1 link is lower than a certain threshold, the remote UE starts to measure neighbor nodes including a base station cell and/or other SL relays, measures and reports the measurement result to the SL relay1 (on the SL link). SL relay1 selects a target node for switching (HO) remote UE, such as SL relay 2, according to the measurement result reported by the remote UE.

When the SL relay1 selects the SL relay 2 as a switching target, the SL relay1 sends a switching request to the SL relay 2, wherein the switching request carries the service slice information of the remote UE and the slice information related to the SL relay1, and the service slice information is used for the SL relay 2 to determine whether to accept the switching request.

It should be noted that the communication process between the SL relay1 and the SL relay 2 needs to be forwarded by the base station.

Namely, the specific implementation of sending the switching request from the SL relay1 to the SL relay 2 is as follows: SL relay1 firstly sends a switching request (HO req) to a base station gNB, and when the base station receives the HO req sent by SL relay1, the base station forwards the HO req to SL relay 2 according to the information of the HO req and the information of the service slice of remote UE.

After receiving the handover request, the SL relay 2 determines whether the service slice information of the remote UE is supported, and if so, the SL relay 2 feeds back information (HO ack information) of receiving the handover request to the base station and forwards the information to the SL relay 1; if the information can not be supported, the SL relay 2 feeds back the switching refusing request information to the base station, and the information is forwarded to the SL relay1 by the base station. Receiving switching request information carrying random access channel RACH resources required by the remote UE to switch to SL relay 2; the reject handover request information carries the reason for rejecting the handover request, such as slice information required by the non-remote UE.

And if the SL relay1 receives the information (HO ack information) of receiving the switching request, sending an HO command to the remote UE, wherein the HO command carries the RACH resources of the random access channel required by the remote UE to be switched to the SL relay 2.

When the remote UE receives an HO command sent by the SL relay1, the HO command carries the RACH resource of the random access channel required by the remote UE to be switched to the SL relay 2, the UE releases the connection with the SL relay1 and initiates RRC connection to the SL relay 2.

Fig. 7 is a schematic diagram of a Remote UE switching from a SL relay to a base station under different base stations according to an embodiment of the present application. As shown in fig. 7, the remote UE performs traffic in the SL relay. When the signal of the SL link is lower than a certain threshold, the remote UE starts measuring neighbor nodes including a base station cell and/or other SL relays, measures and reports the measurement result to the SL relays (on the SL link). The SL relay selects a target node for Handover (HO) of the remote UE, such as a cell under the second base station gNB2, according to the measurement result reported by the remote UE.

When the SL relay selects a cell under the second base station as a switching target, the SL relay sends a switching request to the first base station gNB1, the first base station forwards the switching request to the second base station, the switching request at least carries service slice information of the remote UE, and the service slice information is used for the second base station to determine whether to accept the switching request.

After receiving the handover request, the second base station determines whether the service slice information of the remote UE is supported, and if so, the second base station feeds back information (HO ack information) of receiving the handover request to the first base station and forwards the information to the SL relay; and if the information cannot be supported, the second base station feeds back the switching refusing request information to the first base station, and the switching refusing request information is forwarded to the SL relay by the first base station. Receiving switching request information carrying random access channel RACH resources required by the remote UE to be switched to a second base station; the reject handover request information carries the reason for rejecting the handover request, such as slice information required by the non-remote UE.

And if the SL relay receives the information (HO ack information) of receiving the switching request, sending an HO command to the remote UE, wherein the HO command carries the RACH resources of the random access channel required by the remote UE to be switched to the second base station.

When the remote UE receives an HO command sent by the SL relay, the HO command carries random access channel RACH resources required by the remote UE to be switched to the second base station, and the UE releases the connection with the SL relay and initiates RRC connection to the second base station.

Fig. 8 is a schematic diagram of a Remote UE switching from SL relay1 to SL relay 2 under different base stations according to an embodiment of the present disclosure. As shown in fig. 8, the remote UE is doing traffic at SL relay 1. When the signal of the SL relay1 link is lower than a certain threshold, the remote UE starts to measure neighbor nodes including a base station cell and/or other SL relays, measures and reports the measurement result to the SL relay1 (on the SL link). The SL relay1 selects a target node for Handover (HO) of the remote UE, such as the SL relay 2 under the second base station gNB2, according to the measurement result reported by the remote UE.

When the SL relay1 selects SL relay 2 under the second base station as the handover target, the SL relay1 sends a handover request to the first base station gNB1, the first base station forwards the handover request to the second base station, and the second base station forwards the handover request to the SL relay 2. The handover request carries at least service slice information of the remote UE, where the service slice information is used for the SL relay 2 to determine whether to accept the handover request.

After receiving the handover request, the SL relay 2 determines whether the service slice information of the remote UE is supported, and if so, the SL relay 2 feeds back information (HO ack information) of receiving the handover request to the second base station, forwards the information to the first base station by the second base station, and forwards the information to the SL relay1 by the first base station; if the information can not be supported, the SL relay 2 feeds back the information of refusing the switching request to the second base station, and the information is forwarded to the first base station by the second base station and then forwarded to the SL relay1 by the first base station. Receiving switching request information carrying random access channel RACH resources required by the remote UE to switch to SL relay 2; the reject handover request information carries the reason for rejecting the handover request, such as slice information required by the non-remote UE.

Fig. 9 is a schematic diagram of a Remote UE switching from a base station to an SL relay under the same base station according to an embodiment of the present application. As shown in fig. 9, a remote UE performs traffic at a base station gNB. When the Uu link signal is lower than a certain threshold, the remote UE starts measuring neighbor nodes including a base station cell and/or other SL relay, measures and reports the measurement result to the base station. The base station selects a target node, such as a SL relay, for Handover (HO) of the remote UE according to the measurement result reported by the remote UE.

When the base station selects the SL relay as a switching target, the base station sends a switching request (HO req) to the SL relay, wherein the switching request at least carries the service slice information of the remote UE, and the service slice information is used for the SL relay to determine whether to accept the switching request.

After receiving the handover request, the SL relay determines whether the service slice information of the remote UE is supported, if so, the SL relay feeds back information (HO ack information) of accepting the handover request to the base station, and if not, the SL relay feeds back information of rejecting the handover request to the base station. Receiving switching request information carrying random access channel RACH resources required by the remote UE to switch to SL relay; the reject handover request information carries the reason for rejecting the handover request, such as slice information required by the non-remote UE.

And if the base station receives the information (HO ack information) for receiving the switching request, sending an HO command to the remote UE, wherein the HO command carries the RACH resources of the random access channel required by switching the remote UE to the SL relay.

When the remote UE receives the HO command sent by the base station, the remote UE releases the Uu connection and initiates RRC connection with the SL relay.

Fig. 10 is a schematic diagram of a Remote UE switching from a base station to a SL relay under different base stations according to an embodiment of the present application. As illustrated in fig. 10, the remote UE is doing traffic at the second base station gNB 2. When the link signal of the UE and the second base station is lower than a certain threshold, the remote UE starts measuring neighbor nodes including a base station cell and/or other SL relay, measures and reports the measurement result to the second base station. The second base station selects a target node for Handover (HO) of the remote UE, such as the SL relay of the first base station gNB1, according to the measurement result reported by the remote UE.

When the second base station selects the SL relay of the first base station as a switching target, the second base station sends a switching request (HO req) to the first base station, and the first base station forwards the switching request to the SL relay. The handover request at least carries service slice information of the remote UE, where the service slice information is used for the SL relay to determine whether to accept the handover request.

After receiving the handover request, the SL relay determines whether the service slice information of the remote UE is supported, and if so, the SL relay feeds back handover request accepting information (HO ack information) to the first base station and forwards the handover request accepting information to the second base station; if the information can not be supported, the SL relay feeds back the switching refusing request information to the first base station, and the first base station forwards the switching refusing request information to the second base station. Receiving switching request information carrying random access channel RACH resources required by the remote UE to switch to SL relay; the reject handover request information carries the reason for rejecting the handover request, such as slice information required by the non-remote UE.

And if the second base station receives the information (HO ack information) for receiving the switching request, sending an HO command to the remote UE, wherein the HO command carries the RACH resources of the random access channel required by switching the remote UE to the SL relay.

When the remote UE receives the HO command sent by the second base station, the remote UE releases the Uu connection with the second base station and initiates RRC connection with the SL relay of the first base station.

The switching method based on the side link relay provided by the embodiment of the application realizes switching in the scene supporting the SL relay, and can ensure the continuity and the service quality of the terminal service by utilizing the slice information.

In the sidelink relay-based handover method provided in the embodiment of the present application, the execution main body may be a sidelink relay-based handover device, or a control module in the sidelink relay-based handover device for executing the sidelink relay-based handover method. In the embodiment of the present application, a method for performing a handover based on a sidelink relay by using a handover device based on a sidelink relay is taken as an example, and the handover device based on a sidelink relay provided in the embodiment of the present application is described.

Fig. 11 is a schematic structural diagram of a switching apparatus based on a sidelink relay according to an embodiment of the present application, where the apparatus is applied to a first communication device, and includes: a measurement unit 1110 and a transmission unit 1120,

a measuring unit 1110, configured to measure a neighboring node when a signal strength/quality of a link between the first communication device and the second communication device is lower than a preset threshold;

a sending unit 1120, configured to send a measurement result to the second communication device;

Optionally, the measurement result includes at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

Optionally, the method further includes:

a switching unit, configured to receive a switching command sent by the second communication device, release a connection with the second communication device, and initiate a Radio Resource Control (RRC) connection to the target node;

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station.

a first SL relay under the first base station;

a second SL relay under a second base station.

The switching device based on the side link relay provided by the embodiment of the application realizes the switching under the SL relay scene, and can ensure the continuity and the service quality of the terminal service by utilizing the slice information.

The switching device based on the side link relay in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The switching device based on the side link relay in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.

The handover device based on the sidelink relay according to the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2, 5 to 10, and achieve the same technical effect, and is not described herein again to avoid repetition.

Fig. 12 is a second schematic structural diagram of a switching apparatus based on a sidelink relay according to an embodiment of the present application, where the apparatus is applied to a second communication device, and includes: a target node determining unit 1210, and a handover request transmitting unit 1220, wherein,

a target node determining unit 1210, configured to receive a measurement result sent by a first communication device, and determine, from the neighboring nodes, a target node to which the first communication device is handed over based on the measurement result;

a handover request sending unit 1220, configured to send a handover request to the target node, where the handover request at least carries service slice information of the first communication device.

Optionally, the measurement result includes at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

wherein the slice information comprises core network slice information and/or radio access network RAN slice information;

the neighbor node comprises a neighbor cell and/or a neighbor side link relay (SL relay) of the second communication device.

Optionally, the determining a target node to which the first communication device is handed over based on the measurement result includes:

Optionally, the method further includes: a handover processing unit configured to:

receiving switching request receiving information sent by the target node, and sending a switching command to first communication equipment;

wherein, the information of receiving the switching request carries the random access channel RACH resource required by the first communication equipment to switch to the target node, and the switching command carries the RACH resource;

alternatively, the first and second electrodes may be,

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station;

the sending of the handover request to the target node comprises one of:

sending a handover request to the first base station;

a first SL relay under the first base station;

a second SL relay under a second base station;

the sending of the handover request to the target node includes:

The switching device based on the side link relay in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal or a network side device.

The switching device based on the side link relay provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 3, 5 to 10, and achieve the same technical effect, and is not described herein again to avoid repetition.

Fig. 13 is a third schematic structural diagram of a handover apparatus based on sidelink relay according to an embodiment of the present application, where the apparatus is applied to a target node, and includes: a handover request receiving unit 1310 and a handover request feedback unit 1320, wherein,

a handover request receiving unit 1310, configured to receive a handover request sent by a second communication device, where the handover request at least carries service slice information of the first communication device;

a handover request feedback unit 1320, configured to determine, based on slice information of the handover request receiving unit, service slice information supporting the first communication device, and send handover receiving request information to the second communication device, where the handover receiving request information carries a random access channel RACH resource required for the first communication device to handover to the target node; alternatively, the first and second electrodes may be,

The handover device based on the sidelink relay according to the embodiment of the present application can implement each process implemented by the method embodiments of fig. 4 and fig. 5 to fig. 10, and achieve the same technical effect, and is not described herein again to avoid repetition.

Optionally, as shown in fig. 14, an embodiment of the present application further provides a communication device 1400, which includes a processor 1401, a memory 1402, and a program or an instruction stored in the memory 1402 and executable on the processor 1401, for example, when the communication device 1400 is a terminal, the program or the instruction is executed by the processor 1401 to implement each process of the above-mentioned handover method embodiment based on the side-link relay, and can achieve the same technical effect. When the communication device 1400 is a network-side device or a sidelink relay, the program or the instructions are executed by the processor 1401 to implement the processes of the above-mentioned handover method embodiment based on the sidelink relay, and the same technical effect can be achieved, and for avoiding repetition, the details are not described here again.

Fig. 15 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application.

The terminal 1500 includes, but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509, and a processor 1510.

Those skilled in the art will appreciate that the terminal 1500 may also include a power supply (e.g., a battery) for powering the various components, which may be logically coupled to the processor 1510 via a power management system to manage charging, discharging, and power consumption management functions via the power management system. The terminal structure shown in fig. 15 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that in the embodiment of the present application, the input Unit 1504 may include a Graphics Processing Unit (GPU) 15041 and a microphone 15042, and the Graphics processor 15041 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1507 includes a touch panel 15071 and other input devices 15072. A touch panel 15071, also referred to as a touch screen. The touch panel 15071 may include two parts of a touch detection device and a touch controller. Other input devices 15072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment, the radio frequency unit 1501 receives downlink data from a network side device and then processes the downlink data in the processor 1510; in addition, the uplink data is sent to the network side equipment. In general, the radio frequency unit 1501 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1509 may be used to store software programs or instructions as well as various data. The memory 1509 may mainly include a stored program or instruction area and a stored data area, wherein the stored program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 1509 may include a high-speed random access Memory and may further include a nonvolatile Memory, wherein the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 1510 may include one or more processing units; optionally, the processor 1510 may integrate an application processor, which primarily handles operating system, user interface, and applications or instructions, etc., and a modem processor, which primarily handles wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1510.

Wherein, the processor 1510 is configured to measure a neighbor node if the signal strength/quality of a link between the first communication device and the second communication device is lower than a preset threshold;

a radio frequency unit 1501, configured to send a measurement result to the second communication device;

The terminal provided in the embodiment of the present application measures the neighboring cell or the neighboring SL relay and sends the measurement result to the second communication device when the signal strength/quality of the link between the terminal and the second communication device is lower than the preset threshold, thereby implementing terminal handover in a scenario supporting SL relay.

Optionally, the measurement result includes at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

Optionally, the radio frequency unit 1501 is further configured to receive a handover command sent by the second communication device, release the connection with the second communication device, and initiate radio resource control RRC connection to the target node;

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station.

a first SL relay under the first base station;

a second SL relay under a second base station.

The terminal provided by the embodiment of the application realizes switching in a scene supporting SL relay, and can ensure the continuity and the service quality of the terminal service by using the slice information.

In an embodiment, optionally, the radio frequency unit 1501 is configured to receive a measurement result sent by the first communication device;

a processor 1510 configured to determine a target node for handover of the first communication device based on the measurement result;

the radio frequency unit 1501 is further configured to send a handover request to the target node, where the handover request at least carries service slice information of the first communication device.

The terminal provided in the embodiment of the present application, by receiving the measurement result sent by the first communication device, determining the target node to which the first communication device is switched based on the measurement result, and then sending the switching request to the target node, where the switching request at least carries service slice information of the first communication device, realizes switching in a SL relay scenario, and by using the slice information, continuity and service quality of a terminal service can be ensured.

Optionally, the measurement result includes at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

Optionally, the radio frequency unit 1501 is further configured to:

alternatively, the first and second electrodes may be,

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station;

the sending of the handover request to the target node comprises one of:

sending a handover request to the first base station;

a first SL relay under the first base station;

a second SL relay under a second base station;

the sending of the handover request to the target node includes:

In an embodiment, optionally, the radio frequency unit 1501 is configured to receive a handover request sent by a second communication device, where the handover request at least carries service slice information of the first communication device;

a processor 1510, configured to determine, based on slice information of itself, service slice information supporting the first communication device, and send handover receiving request information to the second communication device, where the handover receiving request information carries a random access channel RACH resource required for the first communication device to be handed over to the target node; alternatively, the first and second electrodes may be,

The terminal provided by the embodiment of the application realizes the terminal switching under the SL relay scene, and can ensure the continuity and the service quality of the terminal service by using the slice information.

The embodiment of the application also provides network side equipment. As shown in fig. 16, the network device 1600 includes: an antenna 1601, a radio frequency device 1602, a baseband device 1603. The antenna 1601 is connected to the radio frequency device 1602. In the uplink direction, the rf device 1602 receives information via the antenna 1601 and transmits the received information to the baseband device 1603 for processing. In the downlink direction, the baseband device 1603 processes information to be transmitted and transmits the processed information to the rf device 1602, and the rf device 1602 processes the received information and transmits the processed information via the antenna 1601.

The above switching device based on side link relay may be located in the baseband device 1603, and the method performed by the network side equipment in the above embodiment may be implemented in the baseband device 1603, where the baseband device 1603 includes the processor 1604 and the memory 1605.

The baseband device 1603 may include, for example, at least one baseband board on which a plurality of chips are disposed, as shown in fig. 16, where one of the chips, for example, the processor 1604, is connected to the memory 1605 to call up a program in the memory 1605 to perform the network device operation shown in the above method embodiment.

The baseband device 1603 may further include a network interface 1606 for exchanging information with the rf device 1602, such as a Common Public Radio Interface (CPRI).

Optionally, the network side device in the embodiment of the present application further includes: the instructions or programs stored in the memory 1605 and executable on the processor 1604, the processor 1604 calls the instructions or programs in the memory 1605 to execute the method executed by each module shown in fig. 12 or 13, or execute the method shown in fig. 3, 4, 9 or 10, and achieve the same technical effect, and are not described herein for avoiding repetition.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above handover method embodiment based on a side link relay, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

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

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a terminal or a network-side device program or an instruction, so as to implement each process of the above switching method embodiment based on side link relaying, and achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

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

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

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a first communication device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A switching method based on a side link relay is applied to a first communication device and is characterized by comprising the following steps:

sending the measurement result to the second communication device;

the second communication device is a sidelink relay SL relay or a base station, and the neighbor node comprises a neighbor cell and/or a neighbor SL relay of the second communication device.

2. The sidelink relay based handover method of claim 1, wherein the measurement result comprises at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

3. The sidelink relay-based handover method of claim 1, further comprising:

receiving a switching command sent by the second communication equipment, releasing the connection with the second communication equipment, and initiating Radio Resource Control (RRC) connection to a target node;

4. The sidelink relay-based handover method of any of claims 1-3, wherein, in case the second communication device is a first SL relay, the target node is one of the following:

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station.

5. The sidelink relay-based handover method according to any of claims 1-3, wherein in case the second communication device is a first base station, the target node is one of the following:

a first SL relay under the first base station;

a second SL relay under a second base station.

6. A switching method based on side link relay is applied to a second communication device and is characterized by comprising the following steps:

7. The sidelink relay-based handover method of claim 6, wherein the measurement result comprises at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

8. The sidelink relay-based handover method of claim 7, wherein the determining the target node for handover of the first communication device based on the measurement result comprises:

9. The sidelink relay-based handover method of claim 6, further comprising:

alternatively, the first and second electrodes may be,

10. The sidelink relay-based handover method of any one of claims 6 to 9, wherein, in case the second communication device is a first SL relay, the target node is one of:

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station;

the sending of the handover request to the target node comprises one of:

sending a handover request to the first base station;

11. The sidelink relay-based handover method according to any of claims 6 to 9, wherein, in case the second communication device is a first base station, the target node is one of:

a first SL relay under the first base station;

a second SL relay under a second base station;

the sending of the handover request to the target node includes:

12. A slice switching method based on side link relay is applied to a target node and is characterized by comprising the following steps:

receiving a switching request sent by second communication equipment, wherein the switching request at least carries service slice information of first communication equipment;

13. A switching device based on side link relay is applied to a first communication device, and is characterized by comprising:

14. The sidelink relay-based switching device of claim 13, wherein the measurement result comprises at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

15. The apparatus for switching based on sidelink relay of claim 13, further comprising:

the switching unit is used for receiving a switching command sent by the second communication equipment, releasing the connection with the second communication equipment and initiating Radio Resource Control (RRC) connection to a target node;

16. The apparatus of any of claims 13-15, wherein in the case that the second communication device is a first SL relay, the target node is one of:

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station.

17. The apparatus of any of claims 13-15, wherein in the case that the second communication device is a first base station, the target node is one of the following:

a first SL relay under the first base station;

a second SL relay under a second base station.

18. A switching device based on side link relay is applied to a second communication device, and is characterized by comprising:

a target node determining unit, configured to receive a measurement result sent by a first communication device, and determine a target node to which the first communication device is handed over based on the measurement result;

19. The sidelink relay-based switching device of claim 18, wherein the measurement results comprise at least one of:

identification ID of the neighbor node;

signal strength/quality of neighbor nodes;

the frequency of the neighbor node;

slice information of neighbor nodes;

20. The apparatus for switching over the sidelink relay as claimed in claim 19, wherein said determining the target node for the handover of the first communication device based on the measurement result comprises:

21. The apparatus for switching based on sidelink relay of claim 18, further comprising: a handover processing unit configured to:

alternatively, the first and second electrodes may be,

wherein the switching request refusing information carries the reason for refusing the switching request.

22. The apparatus of any of claims 18-21, wherein if the second communication device is a first SL relay, the target node is one of:

a cell under a first base station;

a second SL relay under the first base station;

a cell under a second base station;

a third SL relay under the second base station;

the sending of the handover request to the target node comprises one of:

sending a handover request to the first base station;

23. The sidelink relay based switching arrangement as claimed in any of claims 18-21, wherein, in case the second communication device is a first base station, the target node is one of the following:

a first SL relay under the first base station;

a second SL relay under a second base station;

the sending of the handover request to the target node includes:

24. A switching device based on side link relay is applied to a target node, and is characterized by comprising:

a handover request receiving unit, configured to receive a handover request sent by a second communication device, where the handover request at least carries service slice information of a first communication device;

25. A terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the sidelink relay based handover method according to any one of claims 1 to 5, or implementing the steps of the sidelink relay based handover method according to any one of claims 6 to 10, or implementing the steps of the sidelink relay based handover method according to claim 12.

26. A network side device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions when executed by the processor implement the steps of the sidelink relay based handover method according to any one of claims 6 to 9 and 11, or implement the steps of the sidelink relay based handover method according to claim 12.

27. A readable storage medium, on which a program or instructions are stored, which, when executed by a processor, implement the sidelink relay based handover method according to any one of claims 1 to 5, or the steps of the sidelink relay based handover method according to any one of claims 6 to 11, or the steps of the sidelink relay based handover method according to claim 12.