CN109451545B

CN109451545B - Switching judgment method, base station and user equipment

Info

Publication number: CN109451545B
Application number: CN201811469909.6A
Authority: CN
Inventors: 夏海涛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2021-04-20
Anticipated expiration: 2032-12-28
Also published as: CN109451545A; CN104041124A; WO2014101079A1; CN104041124B

Abstract

The invention discloses a switching judgment method, a base station and user equipment. The method comprises the following steps: receiving a reference signal measurement result of a serving cell of a first user equipment, which is sent by the first user equipment and determined by the first user equipment, and receiving a reference signal measurement result of a target cell, which is sent by the first user equipment and determined by a second user equipment; performing handover decision on the second user equipment according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell; the target cell is the serving cell or a cell adjacent to the serving cell, and the second user equipment interacts with a communication network through the first user equipment. In this way, it can be realized that the second user equipment accessing the network through the first user equipment in the weak coverage area can be switched to the target cell due to the improvement of the signal receiving and transmitting conditions of the target cell during the mobility process.

Description

Switching judgment method, base station and user equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a handover decision method, a base station, and a user equipment.

Background

In a class of application scenarios in which one UE (User Equipment) (hereinafter, referred to as "first UE") provides network routing for another UE (hereinafter, referred to as "second UE"), for example, a nearby Radio Access (PRA), the second UE is located in a location with poor Radio transmission and reception signals (e.g., a weak coverage area) in an area covered by a macro network or the second UE is located in an area with coverage holes, and there is no overlay-deployed small cell with enhanced capacity in the area.

When the second UE has accessed the serving cell of the first UE through the wireless link provided by the first UE, in a mobility scenario, for example, the first UE remains stationary while the second UE moves at a lower speed around the first UE, and the wireless link between the second UE and the first UE remains unchanged, but the second UE moves from the current cell with weak coverage or coverage hole to another cell. For another example, the first UE and the second UE both move at a certain speed, and the radio link between the second UE and the first UE is kept unchanged, but the second UE moves from the current cell with weak coverage or coverage hole to another cell. If the second UE moves from the current cell with weak coverage or coverage hole to the target cell with better signal quality in the moving process, how to switch the second UE from the serving cell of the radio link provided by the first UE to the target cell is required to solve the problem that the user experience of the second UE in the moving process is not reduced.

Disclosure of Invention

The embodiment of the invention provides a switching judgment method, user equipment and a base station, which can realize switching of user equipment accessed to a network through other user equipment in a moving process and ensure that the service quality of the UE in the moving process is not remarkably degraded.

In a first aspect, a handover decision method is provided, where the method includes: receiving a reference signal measurement result of a serving cell of a first user equipment, which is sent by the first user equipment and determined by the first user equipment, and receiving a reference signal measurement result of a target cell, which is sent by the first user equipment and determined by a second user equipment; performing handover decision on the second user equipment according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell; the target cell is the serving cell or a cell adjacent to the serving cell, and the second user equipment interacts with a communication network through the first user equipment.

With reference to the first aspect, in a first possible implementation manner, after the performing a handover decision on the second user equipment according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell, the specific implementation may be: and if the result of the switching judgment is that the second user equipment is switched, sending the context information of the second user equipment to a base station of the target cell under the condition that the target cell is the adjacent cell of the serving cell.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the specific implementation may be: and sending a wireless link connection release indication message to the first user equipment, wherein the wireless link connection release indication message is used for indicating the second user equipment to release the wireless link connection with the first user equipment and establish the connection with the target cell.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the specific implementation manner may be: the radio link connection release indication message is further used for carrying a user equipment indication, and the user equipment indication is used for indicating the first user equipment to send the radio link connection release indication message to the second user equipment.

With reference to the first aspect or any one manner of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner, before the receiving a reference signal measurement result of a serving cell of the first user equipment, which is sent by the first user equipment and determined by the first user equipment, the specific implementation manner may be: sending first measurement configuration information and second measurement configuration information to the first user equipment, wherein the first measurement configuration information is used for indicating the first user equipment to determine the reference signal measurement result of the serving cell, and the second measurement configuration information is used for indicating the second user equipment to determine the reference signal measurement result of the target cell.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the specific implementation may be: the first measurement configuration information is further used for carrying an identifier of the first user equipment, and/or the second measurement configuration information is further used for carrying indication information; the identifier of the first user equipment is used to indicate that the first measurement configuration information is of the first user equipment, and the indication information is used to indicate that the first user equipment sends the second measurement configuration information to the second user equipment.

In a second aspect, a handover decision method is provided, which includes: the method comprises the steps that a first user equipment determines a reference signal measurement result of a serving cell of the first user equipment, and receives a reference signal measurement result of a target cell determined by a second user equipment and sent by the second user equipment; the first user equipment sends a reference signal measurement result of the serving cell and a reference signal measurement result of the target cell to a base station of the serving cell, and the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell are used by the base station of the serving cell for making a handover decision for the second user equipment; the target cell is the serving cell or a cell adjacent to the serving cell, and the second user equipment interacts with a communication network through the first user equipment.

With reference to the second aspect, in a first possible implementation manner, the specific implementation may be: the first user equipment receives a wireless link connection release indication message sent by a base station of the serving cell; and the first user equipment sends the wireless link connection release indication message to the second user equipment, wherein the wireless link connection release indication message is used for indicating the second user equipment to release the wireless link connection with the first user equipment and establish the connection with the target cell.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the radio link connection release indication message is further used to carry a user equipment indication, where the user equipment indication is used to indicate the first user equipment to send the radio link connection release indication message to the second user equipment according to the user equipment indication.

With reference to the second aspect or any one manner of the first possible implementation manner to the second possible implementation manner of the second aspect, in a third possible implementation manner, before the first user equipment determines a reference signal measurement result of a serving cell of the first user equipment, the specific implementation manner may be that: the first user equipment receives first measurement configuration information and second measurement configuration information sent by a base station of the serving cell; the determining of the reference signal measurement result of the serving cell may specifically be: determining a reference signal measurement result of the serving cell according to the first measurement configuration information; and the first user equipment sends second measurement configuration information to the second user equipment, wherein the second measurement configuration information is used for indicating the second user equipment to determine a reference signal measurement result of the target cell.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, the specific implementation manner may be: the first measurement configuration information is further used for carrying an identifier of the first user equipment, and/or the second measurement configuration information is further used for carrying indication information; the identifier of the first user equipment is used to indicate that the first measurement configuration information is information of the first user equipment, and the indication information is used to indicate that the first user equipment sends the second measurement configuration information to the second user equipment.

In a third aspect, a handover decision method is provided, where the method includes: the second user equipment determines a reference signal measurement result of the target cell; the second user equipment sends the reference signal measurement result of the target cell to first user equipment, and the reference signal measurement result of the serving cell of the first user equipment and the reference signal measurement result of the target cell, which are determined by the first user equipment, are used by a base station of the serving cell to make a handover decision for the second user equipment; the target cell is the serving cell or a cell adjacent to the serving cell, and the second user equipment interacts with a communication network through the first user equipment.

With reference to the third aspect, in a first possible implementation manner, the specific implementation may be: the second user equipment receives a wireless link connection release indication message sent by the first user equipment; and the second user equipment releases the wireless link connection with the first user equipment according to the wireless link connection release indication message and establishes the connection with the target cell.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner, before the second user equipment determines the reference signal measurement result of the target cell, the specific implementation manner may be that: the second user equipment receives second measurement configuration information sent by the first user equipment; the second user equipment determines a reference signal measurement result of the target cell, and the specific implementation may be: and determining a reference signal measurement result of the target cell according to the second measurement configuration information.

In a fourth aspect, a base station is provided, comprising: a receiving unit, configured to receive a reference signal measurement result of a serving cell of a first user equipment, which is sent by the first user equipment and determined by the first user equipment, and receive a reference signal measurement result of a target cell, which is sent by the first user equipment and determined by a second user equipment; a decision unit, configured to perform handover decision on the second user equipment according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell received by the receiving unit; the target cell is the serving cell or a cell adjacent to the serving cell, and the second user equipment interacts with a communication network through the first user equipment.

With reference to the fourth aspect, in a first possible implementation manner, the base station further includes: a first sending unit, configured to send context information of the second user equipment to a base station of the target cell if the result of the handover decision is that the second user equipment is handed over, where the target cell is an adjacent cell to the serving cell.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the first sending unit is further configured to: and sending a wireless link connection release indication message to the first user equipment, wherein the wireless link connection release indication message is used for indicating the second user equipment to release the wireless link connection with the first user equipment and establish the connection with the target cell.

With reference to the fourth aspect or any one of the first possible implementation manner to the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the base station further includes: a second sending unit, configured to send first measurement configuration information and second measurement configuration information to the first user equipment, where the first measurement configuration information is used to instruct the first user equipment to determine a reference signal measurement result of the serving cell, and the second measurement configuration information is used to instruct the second user equipment to determine a reference signal measurement result of the target cell.

In a fifth aspect, a first user equipment is provided, the first user equipment comprising: a determining unit, configured to determine a reference signal measurement result of a serving cell of the first user equipment; a receiving unit, configured to receive a reference signal measurement result of a target cell determined by a second user equipment, sent by the second user equipment; a sending unit, configured to send a reference signal measurement result of the serving cell and a reference signal measurement result of the target cell to a base station of the serving cell, where the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell are used by the base station of the serving cell to make a handover decision for the second user equipment; the target cell is the serving cell or a cell adjacent to the serving cell, and the second user equipment interacts with a communication network through the first user equipment.

With reference to the fifth aspect, in a first possible implementation manner, the receiving unit is further configured to: receiving first measurement configuration information and second measurement configuration information sent by a base station of the serving cell; the determining unit is specifically configured to: determining a reference signal measurement result of the serving cell according to the first measurement configuration information; the sending unit is further configured to: and sending second measurement configuration information to the second user equipment, wherein the second measurement configuration information is used for indicating the second user equipment to determine a reference signal measurement result of the target cell.

In a sixth aspect, a second user equipment is provided, which includes: a determining unit for determining a reference signal measurement result of a target cell; a sending unit, configured to send a reference signal measurement result of the target cell to a first user equipment, where the reference signal measurement result of a serving cell of the first user equipment and the reference signal measurement result of the target cell, which are determined by the first user equipment, are used by a base station of the serving cell to make a handover decision for the second user equipment; the target cell is the serving cell or a cell adjacent to the serving cell, and the second user equipment interacts with a communication network through the first user equipment.

With reference to the sixth aspect, in a first possible implementation manner, the user equipment further includes: a first receiving unit, configured to receive a radio link connection release indication message sent by the first user equipment; a release unit, configured to release the radio link connection with the first user equipment according to the radio link connection release indication message; an establishing unit, configured to establish a connection with the target cell.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the user equipment further includes: a second receiving unit, configured to receive second measurement configuration information sent by the first user equipment; the determining unit is specifically configured to: and determining a reference signal measurement result of the target cell according to the second measurement configuration information.

Based on the above technical solution, in a scenario where the second UE interacts with the communication network through the first UE, the base station of the serving cell of the first UE performs handover decision on the second UE according to the reference signal measurement result of the serving cell determined by the first UE and the reference signal measurement result of the target cell determined by the second UE, which are sent by the first UE. Therefore, the UE interacting with the communication network through other UE in the weak coverage area can be switched to the target cell due to the improvement of the signal receiving and transmitting conditions of the target cell in the mobility process, and the service quality of the UE in the mobility process is not remarkably degraded.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of an application scenario applicable to embodiments of the present invention.

Fig. 2 is a flowchart of a handover decision method according to an embodiment of the present invention.

Fig. 3 is a flowchart of a handover decision method according to another embodiment of the present invention.

Fig. 4 is a flowchart of a handover decision method according to another embodiment of the present invention.

Fig. 5 is a schematic flow chart of the process of the handover decision method of one embodiment of the present invention.

Fig. 6 is a block diagram of a base station according to an embodiment of the present invention.

Fig. 7 is a block diagram of a first user equipment according to an embodiment of the present invention.

Fig. 8 is a block diagram of a second user equipment according to an embodiment of the present invention.

FIG. 9 is a block diagram of an apparatus of one embodiment of the invention.

Fig. 10 is a block diagram of a base station according to another embodiment of the present invention.

Fig. 11 is a block diagram of a first user equipment according to another embodiment of the present invention.

Fig. 12 is a block diagram of a second user equipment according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) System, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a Wireless Fidelity (WiFi).

It should also be understood that, in the embodiment of the present invention, a User Equipment (User Equipment, abbreviated as "UE") may be referred to as a Terminal (Terminal), a Mobile Station (Mobile Station, abbreviated as "MS"), a Mobile Terminal (Mobile Terminal), and the like, and the User Equipment may communicate with one or more core networks via a Radio Access Network (RAN), for example, the User Equipment may be a Mobile phone (or referred to as a "cellular" phone), a computer with a Mobile Terminal, and the like, for example, the User Equipment may also be a portable, pocket, hand-held, computer-embedded, or vehicle-mounted Mobile device, and they exchange voice and/or data with the RAN.

In the embodiment of the present invention, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in UMTS, or an evolved Node B (eNB, eNodeB) in LTE, and the present invention is not limited thereto.

Fig. 1 is a schematic diagram of an application scenario PRA (Proximity Radio Access) applicable to the embodiment of the present invention. In the scenario of fig. 1, a CF UE (Cellular Function UE, a user equipment with a cell Function) is a first UE in the present invention, an Access UE is a second UE in the present invention, and a wireless Link between the Access UE and the CF UE is called a PRA Link (near radio Access Link). For example, in fig. 1, the Access UE109 is located in a weak coverage area of a macro network (a network formed by the macro base station 101 and the macro base station 102), where the radio transmission and reception signals of the Access UE109 are poor, and there are no small cells (such as the micro base station 103 and the micro base station 104) deployed in an overlapping manner and functioning to enhance capacity in the area. To enable Access to the network, the Access UE109 may perform a discovery procedure to discover other UEs in the surroundings, e.g.: the Access UE109 attempts to initiate a random Access procedure to the selected CF UE 105 by analyzing the measured beacon channel information broadcast by other surrounding UEs (e.g., the CF UE 105 and the CF UE 107). If the found CF UE 105 has a better wireless transceiving signal with the network, and the CF UE 105 can initiate a packet domain service request to connect to the network, the Access UE109 can establish a specific wireless link connection with the CF UE 105, and Access the network through the network route provided by the CF UE 105, in other words, the Access UE109 interacts with the communication network through the CF UE 105, that is, the Access UE109 communicates with the macro base station 101 through the CF UE 105.

Similarly, in fig. 1, the Access UE 110 may communicate with the macro base station 101 through the CF UE 106, the Access UE 111 may communicate with the micro base station 103 through the CF UE 107, and the Access UE 111 may communicate with the micro base station 112 through the CF UE 108.

The same UE may exchange roles between the first UE and the second UE. For example, when the CF UE 105 moves to a coverage blind area of the macro network, the CF UE 105 may switch from the CF UE role to the Access UE role by finding other CF UEs that have better radio transmission and reception signals with the network around to interact with the communication network. For another example, when the Access UE109 enters a location with a better wireless signal transmission and reception in the coverage area of the macro network, the Access UE109 may switch to the role of the CF UE to provide network routing for other Access UEs.

One first UE may serve a plurality of second UEs. Preferably, one first UE provides only one second UE with the near radio access service, considering the application efficiency and implementation complexity of the scenario of the near radio access.

It should be understood that the embodiments of the present invention can be applied in addition to the above-described scenario of nearby wireless access. But also to other scenarios where the second UE accesses the communication network through the network route provided by the first UE, and the invention is not limited thereto.

It should also be noted that the network system in fig. 1 is only a scenario for implementing the present invention to more clearly describe the embodiment of the present invention, and is not intended to limit the application scope of the embodiment of the present invention. For example, fig. 1 depicts one macro base station 101, one micro base station 102, and two UEs 103 and 104, but embodiments of the present invention may also include a smaller or larger number of base stations, or may also include a smaller or larger number of UEs. The embodiment of the invention can also be applied to the scene of the network architecture with only one base station. The base station may be other types of base stations, such as a pico base station, a femto base station, a relay station, and the like, in addition to the macro base station and the micro base station. The embodiment of the present invention is not limited thereto. In addition, in the network system in fig. 1, the number of CF UEs or the number of Access UEs in the embodiment of the present invention is not limited.

Fig. 2 is a flowchart of a handover decision method according to an embodiment of the present invention. The method of fig. 2 is performed by a base station.

And 201, receiving a reference signal measurement result of a serving cell of a first UE, determined by the first UE, sent by the first UE, and receiving a reference signal measurement result of a target cell, determined by a second UE, sent by the first UE.

And 202, performing switching judgment on the second UE according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell.

The target cell is a serving cell or a cell adjacent to the serving cell, and the second UE interacts with the communication network through the first UE.

Optionally, as an embodiment, if the result of the decision in step 202 is to perform handover on the second UE, in case that the target cell is a neighboring cell of the serving cell, after step 202, the base station of the serving cell sends context information of the second UE to the base station of the target cell. Further, the base station of the serving cell transmits a radio link connection release indication message to the first UE.

Alternatively, as another embodiment, if the result of the decision in step 202 is to make a handover decision for the second UE, the base station of the serving cell may directly transmit a radio link connection release indication message to the first UE in the case that the target cell is the serving cell.

The radio link connection release instruction message is used for instructing the second UE to release the radio link connection with the first UE and establish the connection with the target cell.

Alternatively, the reference signal measurement result of the serving cell may be at least one of: a measurement value of Reference Signal Receiving Power (RSRP) of the serving cell, a measurement value of Reference Signal Receiving Quality (RSRQ) of the serving cell, and the like. The reference signal measurement result of the target cell may include at least one of: a measurement value of the received power of the reference signal of the target cell, a measurement value of the received quality of the reference signal of the target cell, and the like.

Specifically, the base station of the serving cell makes a decision according to the reference signal measurement result of the serving cell determined by the first UE and the reference signal measurement result of the target cell determined by the second UE, and if there is one reference signal measurement result of the target cell in the target cell (which is greater than the reference signal measurement result of the serving cell determined by the first UE, the result of the decision of the base station of the serving cell is to perform handover on the second UE.

Optionally, if the result of the decision of the base station of the serving cell is to perform handover to the UE to the target cell with the largest measurement value of the reference signal measurement result, sending context information of the second UE to the base station of the target cell if the target cell is a neighboring cell of the serving cell. Further, the base station of the serving cell may send a radio link connection release indication message to the first UE, where the first UE sends the radio link connection release indication message to the second UE, and the second UE releases the radio link connection with the first UE to establish the connection with the target cell.

Optionally, the radio link connection release indication message may be used to carry a user equipment indication, where the user equipment indication is used to instruct the first UE to send the radio link connection release indication message to the second UE, and the user equipment indication may be a second UE identity (for example, an international mobile subscriber identity of the second UE or an international mobile subscriber identity of the second UE) or a link identity or a link indication. For example, if the first UE parses the second UE identity from the radio link connection release indication message received by the base station of the serving cell, the radio link connection release indication message is transparently sent to the second UE. For another example, when the radio link connection release indication message carries a link identifier or a link indication, and the first UE provides a network route for only one second UE to access the communication network, that is, the link identifier or the link indication uniquely corresponds to the one second UE, the first UE may send the radio link connection release indication message to the second UE according to the link identifier or the link indication. Specifically, since the link identifier of the first UE uniquely corresponds to one second UE, the first UE can distinguish whether the target UE of the message is the second UE through the link identifier in the message transfer with the base station of the serving cell. If the link identifier is set in the message (e.g., to 1), it indicates that the first UE only functions as message relay, and the target UE is the second UE.

Therefore, the second UE interacts with the communication network through the first UE, and if the second UE finds a target cell with better signal during the moving process, the second UE can release the radio link connection with the first UE and switch to the target cell. Therefore, the continuity of the second UE service is ensured, and the service quality of the UE in the mobility process is not remarkably degraded.

Optionally, as another embodiment, before step 201, the base station of the serving cell may send, to the first UE, first measurement configuration information and second measurement configuration information, where the first measurement configuration information is used to instruct the first UE to determine the reference signal measurement result of the serving cell, and the second measurement configuration information is used to instruct the second UE to determine the reference signal measurement result of the target cell. Optionally, the first measurement configuration information includes a measurement target indication of the first UE, and indicates the first UE to measure a reference signal measurement result of the serving cell; the second measurement configuration information includes a measurement target indication of the second UE, indicating that the second UE measures the reference signal measurement result of the target cell.

Optionally, the first measurement configuration information may also be used to carry an identifier of the first UE; and/or the second measurement configuration information may also be used to carry indication information. The identifier of the first UE is used to indicate that the first measurement configuration information is information of the first UE, and the indication information is used to indicate that the first UE sends the second measurement configuration information to the second UE. In particular, the indication information may be a second UE identity or a link indication.

In one implementation, if the first UE parses the second UE identity from a message (second measurement configuration information) received by the base station of the serving cell, the second measurement configuration information is transparently sent to the second UE. If the first UE parses the identity of the first UE from a message (first measurement configuration information) received by the base station of the serving cell, the first UE may determine a reference signal measurement result of the serving cell according to the first measurement configuration information. In another implementation, the first UE may determine whether the message belongs to the second UE by whether the message sent by the base station of the serving cell carries the link identifier or the link indicator.

Fig. 3 is a flowchart of a handover decision method according to an embodiment of the present invention. The method of fig. 3 is performed by a first UE. And corresponds to the method of fig. 2, and thus a description overlapping with the embodiment of fig. 2 will be appropriately omitted.

301, a first UE determines a reference signal measurement result of a serving cell of the first UE and receives a reference signal measurement result of a target cell determined by a second UE sent by the second UE.

302, the first UE sends the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell to the base station of the serving cell, and the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell are used by the base station of the serving cell to perform handover decision on the second UE.

Optionally, as an embodiment, after step 302, the first UE receives a radio link connection release indication message sent by the base station of the serving cell, and sends the radio link connection release indication message to the second UE. And the second UE releases the wireless link connection with the first UE and establishes connection with the target cell.

Optionally, the radio link connection release indication message may be used to carry a user equipment indication, where the user equipment indication is used to indicate that the first UE sends the radio link connection release indication message to the second UE, and the user equipment indication may be a second UE identity or a link indication. For example, if the first UE parses the second UE identity from the radio link connection release indication message received by the base station of the serving cell, the radio link connection release indication message is transparently sent to the second UE. For another example, when the radio link connection release indication message carries a link identifier or a link indication, and the first UE provides a network route for only one second UE to access the communication network, that is, the link identifier or the link indication uniquely corresponds to the one second UE, the first UE may send the radio link connection release indication message to the second UE according to the link identifier or the link indication. Specifically, since the link identifier or the link indication of the first UE uniquely corresponds to one second UE, the first UE can distinguish whether the target user equipment of the message is the second UE through the link identifier or the link indication in the message transfer with the base station of the serving cell. For example, if the link identifier is set in the message (e.g., to 1), it indicates that the first UE only functions as message relay, and the target UE is the second UE.

Optionally, as another embodiment, before step 301, the first UE receives first measurement configuration information and second measurement configuration information sent by the base station of the serving cell, where the first measurement configuration information is used to instruct the first UE to determine a reference signal measurement result of the serving cell, and the second measurement configuration information is used to instruct the second UE to determine a reference signal measurement result of the target cell.

Optionally, the first measurement configuration information may also be used to carry an identifier of the first UE; and/or the second measurement configuration information may be used to carry indication information. The identifier of the first UE is used to indicate that the first measurement configuration information is information of the first UE, and the indication information is used to indicate that the first UE sends the second measurement configuration information to the second UE.

Fig. 4 is a flowchart of a handover decision method according to another embodiment of the present invention. The method of fig. 4 is performed by a second UE. And corresponds to the method of fig. 2 and 3, and thus a description overlapping with the embodiment of fig. 2 and 3 will be appropriately omitted.

401, the second UE determines a reference signal measurement result of the target cell.

402, the second UE sends the reference signal measurement result of the target cell to the first UE, and the reference signal measurement result of the serving cell of the first UE and the reference signal measurement result of the target cell determined by the first UE are used by the base station of the serving cell to make a handover decision for the second UE.

Optionally, as an embodiment, after step 402, the second UE may receive a radio link connection release indication message sent by the first UE, and the second UE releases the radio link connection with the first UE to establish a connection with the target cell.

Optionally, as another embodiment, before step 401, the second UE receives second measurement configuration information sent by the first UE, and determines a reference signal measurement result of the target cell according to the second measurement configuration information.

An embodiment of the present invention is described in detail below with reference to the example of fig. 5.

Fig. 5 is a schematic flow chart of the process of the handover decision method of one embodiment of the present invention. In fig. 5, fig. 5 illustrates the application scenario PRA of fig. 1, which is only for helping those skilled in the art to better understand the embodiment of the present invention, and is not intended to limit the scope of the present invention. The technical scheme of the invention can also be applied to the application scene that one UE accesses the network through another UE.

In the following, at least one target cell will take 3 target cells as an example, the measurement target takes RSRQ as an example, the first UE takes CF UE 105 as an example, the second UE takes Access UE109 as an example, and the target cell to which the second UE is handed over is described as macro base station 102. It is to be understood that the embodiments of the present invention are not limited thereto.

501, the macro base station 101 sends a measurement request message to the CF UE 105.

The base station of the serving cell of the CF UE 105 is the macro base station 101, and the measurement request message sent by the macro base station 101 to the CF UE 105 includes the first measurement configuration information and the second measurement configuration information.

For example, the first measurement configuration information includes a measurement target indication of the first UE, which indicates that the first UE measures RSRQ of the serving cell; the second measurement configuration information includes a measurement target indication of the second UE, and indicates the second UE to measure the RSRQ of the target cell.

502, the CF UE 105 sends the second measurement configuration information to the Access UE 109.

The CF UE 105 parses the Access UE109 identifier, the PRA Link identifier, or the PRA Link instruction from the message (second measurement configuration information) received by the macro base station 101, and transparently sends the message to the Access UE 109.

503, the Access UE109 determines the measurement value of the RSRQ of the target cell.

The CF UE 105 determines 504 a measurement of RSRQ of the macro base station 101 serving cell.

For example, after the Access UE109 receives the second measurement configuration information in step 502, the Access UE109 measures RSRQ of a carrier frequency cell that can be served by the macro base station 102, where the measurement value is Q2; measuring the RSRQ of the carrier frequency cells that can be served by the micro base station 103, with a measurement value of Q3; RSRQ of the carrier frequencies that the micro base station 104 can serve is measured, with a measurement value of Q4. The measurement values of RSRQ of the target cell determined by the Access UE109 include measurement values Q2, Q3, and Q4. The CF UE 105 measures the RSRQ of the macro base station 101 serving carrier frequency cell, the measurement value being Q1. The RSRQ measurements of macro base station 101 determined by CF UE 105 include measurement Q1.

It should be noted that the embodiment of the present invention does not limit the sequence of the two steps 503 and 504.

505, the Access UE109 sends the measurement value of RSRQ of the target cell to the CF UE 105.

506, the CF UE 105 sends the measurement value of RSRQ of the target cell and the measurement value of RSRQ of the macro base station 101 to the macro base station 101.

507, the macro base station 101 makes a handover decision for the Access UE 109.

Alternatively, if the measured value Q2 is the largest, i.e. the signal of the current Access UE109 in the cell of the macro base station 102 is the best, the macro base station 101 may determine the macro base station 102 as the target cell for the Access UE109 to handover.

508, the macro base station 101 sends the context information of the Access UE109 to the macro base station 102.

509, the macro base station 101 transmits a radio link connection release indication message to the CF UE 105.

Optionally, the radio Link connection release indication message carries an identifier of the Access UE109 or a PRA Link identifier or a PRA Link indication.

510, the CF UE 105 transmits a radio link connection release indication message to the Access UE 109.

The CF UE 105 parses the identifier of the Access UE109, or the PRA Link identifier, or the PRA Link indication from the message (radio Link connection release indication message) received by the macro base station 101, and transparently transmits the message to the Access UE 109.

511, the Access UE109 releases the radio link connection with the CF UE 105.

512, the Access UE109 establishes a connection with the macro base station 102.

For example, the macro base station 101 transmits a radio link release indication message to the CF UE 105. When the Access UE109 releases the PRA Link between the CF UEs 105, the Access UE109 establishes a connection with the macro base station 102.

Therefore, it can be achieved that a UE accessing a network through other UEs in a weak coverage area can be handed over to a target cell due to an improvement in the conditions for the target cell to transmit and receive signals during mobility. In this way, the continuity of the UE traffic and the quality of service during mobility are guaranteed without significant degradation.

Fig. 6 is a block diagram of a base station according to an embodiment of the present invention. The base station 600 comprises a receiving unit 601 and a decision unit 602.

The receiving unit 601 is configured to receive a reference signal measurement result of a serving cell of a first UE determined by the first UE and sent by the first UE, and receive a reference signal measurement result of a target cell determined by a second UE and sent by the first UE.

The decision unit 602 is configured to perform a handover decision on the second UE according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell received by the receiving unit 601.

The base station 600 may implement the operations related to the base station in the embodiments of fig. 2 to 5, and thus, in order to avoid repetition, will not be described in detail.

Optionally, as an embodiment, the base station 600 may further include a first sending unit 603. A first sending unit 603, configured to send context information of the second UE to a base station of the target cell if the result of the handover decision is to perform handover on the second UE, where the target cell is a neighboring cell of the serving cell.

Further, the first sending unit 603 may be further configured to send a radio link connection release indication message to the first UE, where the radio link connection release indication message is used to instruct the second UE to release the radio link connection with the first UE and establish a connection with the target cell.

Optionally, the radio link connection release indication message may be used to carry a user equipment indication, where the user equipment indication is used to instruct the first UE to send the radio link connection release indication message to the second UE, and the user equipment indication may be a second UE identity or a link indication.

Optionally, as another embodiment, the base station 600 may further include a second sending unit 604, where the second sending unit 604 is configured to send, to the first UE, first measurement configuration information and second measurement configuration information, where the first measurement configuration information is used to instruct the first UE to determine a reference signal measurement result of the serving cell, and the second measurement configuration information is used to instruct the second UE to determine a reference signal measurement result of the target cell.

Fig. 7 is a block diagram of a first UE according to an embodiment of the present invention. The first UE 700 includes a determination unit 701, a reception unit 702, and a transmission unit 703.

A determining unit 701, configured to determine a reference signal measurement result of a serving cell of a first UE.

A receiving unit 702, configured to receive a reference signal measurement result of a target cell determined by a second UE sent by the second UE.

A sending unit 703, configured to send the reference signal measurement result of the serving cell determined by the determining unit 701 and the reference signal measurement result of the target cell received by the receiving unit 702 to the base station of the serving cell of the first UE, where the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell are used by the base station of the serving cell to make a handover decision for the second UE.

The first UE 700 may implement the operations related to the first UE in the embodiments of fig. 2 to 5, and thus, in order to avoid repetition, will not be described in detail.

Optionally, as an embodiment, the receiving unit 702 is further configured to receive a radio link connection release indication message sent by the base station of the serving cell. The sending unit 703 is further configured to send a radio link connection release indication message to the second UE, where the radio link connection release indication message is used to indicate the second UE to release the radio link connection with the first UE, and establish a connection with the target cell.

Optionally, as another embodiment, the receiving unit 702 may further be configured to receive first measurement configuration information and second measurement configuration information sent by a base station of a serving cell, and the determining unit 701 is specifically configured to determine a reference signal measurement result of the serving cell according to the first measurement configuration information. The sending unit 703 is further configured to send second measurement configuration information to the second UE, where the second measurement configuration information is used to instruct the second UE to determine a reference signal measurement result of the target cell.

Fig. 8 is a block diagram of a second UE according to an embodiment of the present invention. The second UE 800 includes a determination unit 801 and a transmission unit 802.

The determination unit 801 is configured to determine a reference signal measurement result of the target cell.

The sending unit 802 is configured to send the reference signal measurement result of the target cell to the first UE, where the reference signal measurement result of the serving cell of the first UE and the reference signal measurement result of the target cell, which are determined by the first UE, are used by the base station of the serving cell to make a handover decision for the second UE.

The second UE 800 may implement the operations related to the second UE in the embodiments of fig. 2 to 5, and thus, in order to avoid repetition, will not be described in detail.

Optionally, as an embodiment, the second UE further includes: the first receiving unit 803 is configured to receive a radio link connection release indication message sent by the first UE. The releasing unit 804 is configured to release the radio link connection with the first UE according to the radio link connection release indication message. The establishing unit 805 is used for establishing a connection with a target cell.

Optionally, as another embodiment, the second UE further includes a second receiving unit 806, where the second receiving unit 806 is configured to receive the second measurement configuration information sent by the first UE. The determining unit 801 is specifically configured to determine a reference signal measurement result of the target cell according to the second measurement configuration information.

In addition, the same UE may have the functions of the first UE and the second UE.

The embodiment of the invention further provides an embodiment of a device for realizing the steps and the method in the embodiment of the method. Fig. 9 shows an embodiment of an apparatus, in which the apparatus 900 comprises a processor 901, a memory 902, a transmitter 903 and a receiver 904. Processor 901 controls the operation of device 900, and processor 901 may also be referred to as a CPU (Central Processing Unit). The memory 902 may include a read-only memory and a random access memory, and provides instructions and data to the processor 901. A portion of the memory 902 may also include non-volatile row random access memory (NVRAM). The processor 901, the memory 902, the transmitter 903 and the receiver 904 are coupled together by a bus system 99, wherein the bus system 910 includes a power bus, a control bus and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are designated as bus system 910 in the figure.

The method disclosed in the above embodiments of the present invention can be applied to the apparatus 900 described above. The processor 901 may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901.

Further, fig. 10 is a block diagram of a base station according to an embodiment of the present invention. The base station 1000 comprises a receiver 1001 and a processor 1002.

The receiver 1001 is configured to receive a reference signal measurement result of a serving cell of a first UE determined by the first UE and sent by the first UE, and receive a reference signal measurement result of a target cell determined by a second UE and sent by the first UE.

The processor 1002 is configured to make a handover decision for the second UE according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell received by the receiver 1001.

The base station 1000 may implement the operations related to the base station in the embodiments of fig. 2 to 5, and thus, in order to avoid repetition, will not be described in detail.

Optionally, as an embodiment, the base station 1000 further includes a transmitter 1003, and the transmitter 1003 is configured to send context information of the second UE to the base station of the target cell if the target cell is a neighboring cell of the serving cell if the handover decision results in the handover of the second UE.

Further, the transmitter 1003 may be further configured to send a radio link connection release indication message to the first UE, where the radio link connection release indication message is used to instruct the second UE to release a radio link connection with the first UE and establish a connection with the target cell.

Optionally, the radio link connection release indication message may be used to carry a user equipment indication, where the user equipment indication is used to indicate that the radio link connection release indication message is a message sent by the first UE to the second UE, and the user equipment indication may be a second UE identity or a link indication.

Optionally, as another embodiment, the transmitter 1003 may be further configured to transmit, to the first UE, first measurement configuration information and second measurement configuration information, where the first measurement configuration information is used to instruct the first UE to determine a reference signal measurement result of the serving cell, and the second measurement configuration information is used to instruct the second UE to determine a reference signal measurement result of the target cell.

Fig. 11 is a block diagram of a first UE according to an embodiment of the present invention. The first UE 1100 includes a processor 1101, a receiver 1102, and a transmitter 1103.

Processor 1101 is configured to determine reference signal measurements for a serving cell of a first UE.

The receiver 1102 is configured to receive a reference signal measurement of a target cell determined by a second UE sent by the second UE.

The transmitter 1103 is configured to transmit the reference signal measurement result of the serving cell determined by the processor 1101 and the reference signal measurement result of the target cell received by the receiver 1102 to the base station of the serving cell of the first UE, and the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell are used by the base station of the serving cell to make a handover decision for the second UE.

The first UE 1100 may implement the operations related to the first UE in the embodiments of fig. 2 to 5, and thus, in order to avoid repetition, will not be described in detail.

Optionally, as an embodiment, the receiver 1102 is further configured to receive a radio link connection release indication message sent by the base station of the serving cell. The transmitter 1103 is further configured to send a radio link connection release indication message to the second UE, where the radio link connection release indication message is used to instruct the second UE to release a radio link connection with the first UE, and establish a connection with the target cell.

Optionally, the radio link connection release indication message may be used to carry a user equipment indication, where the user equipment indication is used to indicate the first UE to send the radio link connection release indication message to the second UE, and the user equipment indication may be a second UE identity or a link indication.

Optionally, as another embodiment, the receiver 1102 may further be configured to receive first measurement configuration information and second measurement configuration information sent by a base station of a serving cell, and the processor 1101 is specifically configured to determine a reference signal measurement result of the serving cell according to the first measurement configuration information. The transmitter 1103 is further configured to send second measurement configuration information to the second UE, where the second measurement configuration information is used to instruct the second UE to determine a reference signal measurement result of the target cell.

Optionally, the first measurement configuration information may further include an identity of the first UE; and/or the second measurement configuration information also carries an identity or a link indication of the second UE.

Fig. 12 is a block diagram of a second UE according to an embodiment of the present invention. The second UE 1200 includes a processor 1201 and a transmitter 1202.

The processor 1201 is configured to determine a reference signal measurement result of a target cell.

The transmitter 1202 is configured to transmit a reference signal measurement result of a target cell to a first UE, and the reference signal measurement result of the serving cell of the first UE and the reference signal measurement result of the target cell determined by the first UE are used by a base station of the serving cell to make a handover decision for a second UE.

The second UE 1200 may implement the operations related to the second UE in the embodiments of fig. 2 to 5, and thus, in order to avoid repetition, will not be described in detail.

Optionally, as an embodiment, the second UE further includes: the receiver 1203 is configured to receive a radio link connection release indication message sent by the first UE. The processor 1201 may be further configured to release the radio link connection with the first UE according to the radio link connection release indication message, and establish a connection with the target cell.

Optionally, as another embodiment, the receiver 1203 may be further configured to receive second measurement configuration information sent by the first UE. The processor 1201 is further configured to determine a reference signal measurement result of the target cell according to the second measurement configuration information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of handover, comprising:

the first terminal receives a reference signal measurement result of at least one target cell from the second terminal;

the first terminal determines a reference signal measurement result of a serving cell of the first terminal;

the first terminal sends a reference signal measurement result of the serving cell and a reference signal measurement result of the at least one target cell to a network device, and the reference signal measurement result of the serving cell and the reference signal measurement result of the at least one target cell are used for determining whether the second terminal is switched to one of the at least one target cell;

the at least one target cell is the serving cell or a cell adjacent to the serving cell, the serving cell belongs to the network device, the first terminal and the second terminal are connected by a wireless link, and the second terminal accesses the network through a network route provided by the first terminal.

2. The method of claim 1, wherein the method further comprises:

the first terminal receives an indication message from the network equipment, wherein the indication message is used for indicating the second terminal to release the wireless link connection with the first terminal and establish the connection with the target cell;

and the first terminal sends the indication message to the second terminal.

3. The method of claim 2, wherein the indication message further comprises first indication information for indicating the second terminal.

4. The method of claim 3, wherein the first indication information comprises an identity of the second terminal; or a link indication or link identification corresponding to the second terminal.

5. The method of any of claims 1-4, further comprising:

receiving first measurement configuration information and second measurement configuration information from the network device;

the determining a reference signal measurement result of a serving cell of the first terminal includes:

determining a reference signal measurement result of the serving cell according to the first measurement configuration information;

the method further comprises the following steps: and the first terminal sends second measurement configuration information to the second terminal, wherein the second measurement configuration information is used for indicating the second terminal to determine a reference signal measurement result of the target cell.

6. The method according to claim 5, characterized in that the first measurement configuration information further comprises an identification of the first terminal, and/or the second measurement configuration information further comprises second indication information; wherein the second indication information is used for indicating the first terminal to send the second measurement configuration information to the second terminal.

7. A method of handover, comprising:

the second terminal determines a reference signal measurement result of at least one target cell;

the second terminal sends a reference signal measurement result of the at least one target cell to the first terminal, wherein the reference signal measurement result of the at least one target cell is used for the network equipment accessed by the first terminal to determine whether the second terminal is switched to one target cell of the at least one target cell;

the target cell is a serving cell of the first terminal or a cell adjacent to the serving cell, the serving cell belongs to the network device, the second terminal is connected with the first terminal through a wireless link, and the second terminal accesses a network through a network route provided by the first terminal.

8. The method of claim 7, wherein the method further comprises:

the second terminal receiving an indication message from the first terminal;

and the second terminal releases the wireless link connection with the first terminal according to the indication message and establishes the connection with the target cell.

9. The method of claim 7 or 8, wherein the method further comprises:

the second terminal receiving second measurement configuration information from the first terminal;

the second terminal determines a reference signal measurement result of the target cell, including:

and the second terminal determines the reference signal measurement result of the target cell according to the second measurement configuration information.

10. The method of claim 9, wherein the second measurement configuration information comprises an identifier of the second terminal, or a link identifier or a link indicator corresponding to the second terminal.

11. A method of handover, comprising:

the network equipment receives a reference signal measurement result of a serving cell of a first terminal determined by the first terminal from the first terminal;

the network device receiving, from the first terminal, reference signal measurements of at least one target cell determined by a second terminal;

the network equipment determines whether the second terminal is switched to one target cell of the at least one target cell according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell;

the target cell is the serving cell or a cell adjacent to the serving cell, the serving cell belongs to the network device, the first terminal and the second terminal are connected by a wireless link, and the second terminal accesses the network through a network route provided by the first terminal.

12. The method of claim 11, wherein the method further comprises:

when the network device determines that the second terminal is switched to one of the at least one target cell, and the target cell is a cell adjacent to the serving cell, the network device sends context information of the second terminal to the network device managing the target cell.

13. The method of claim 11, wherein the method further comprises:

and the network equipment sends an indication message to the first terminal, wherein the indication message is used for indicating the second terminal to release the wireless link connection with the first terminal and establish the connection with the target cell.

14. The method of claim 13, wherein the indication message further comprises first indication information for indicating the second terminal.

15. The method of claim 14, wherein the first indication information comprises an identity of the second terminal; or a link indication or link identification corresponding to the second terminal.

16. The method of any one of claims 11-15, further comprising:

the network device sends first measurement configuration information and second measurement configuration information to the first terminal, wherein the first measurement configuration information is used for indicating the first terminal to determine a reference signal measurement result of the serving cell, and the second measurement configuration information is used for indicating the second terminal to determine a reference signal measurement result of the target cell.

17. The method according to claim 16, characterized in that the first measurement configuration information further comprises an identification of the first terminal, and/or the second measurement configuration information further comprises second indication information; wherein the second indication information is used for indicating the first terminal to send the second measurement configuration information to the second terminal.

18. A first terminal, comprising:

a receiving unit, configured to receive a reference signal measurement result of at least one target cell from a second terminal;

a processing unit configured to determine a reference signal measurement result of a serving cell of the first terminal;

a sending unit, configured to send, to a network device, a reference signal measurement result of the serving cell and a reference signal measurement result of the at least one target cell, where the reference signal measurement result of the serving cell and the reference signal measurement result of the at least one target cell are used to determine whether the second terminal is handed over to one of the at least one target cell;

19. The first terminal of claim 18,

the receiving unit is further configured to: receiving an indication message from the network equipment, wherein the indication message is used for indicating the second terminal to release the wireless link connection with the first terminal and establish the connection with the target cell;

the sending unit is further configured to: and sending the indication message to the second terminal.

20. The first terminal of claim 19, wherein the indication message further comprises first indication information for indicating the second terminal.

21. The first terminal of claim 20, wherein the first indication information includes an identification of the second terminal; or a link indication or link identification corresponding to the second terminal.

22. The first terminal according to any of claims 18-21,

the receiving unit is further configured to: receiving first measurement configuration information and second measurement configuration information from the network device;

the processing unit is specifically configured to: determining a reference signal measurement result of the serving cell according to the first measurement configuration information;

the sending unit is further configured to: and sending second measurement configuration information to the second terminal, wherein the second measurement configuration information is used for indicating the second terminal to determine a reference signal measurement result of the target cell.

23. The first terminal of claim 22, wherein the first measurement configuration information further comprises an identification of the first terminal, and/or wherein the second measurement configuration information further comprises second indication information; wherein the second indication information is used for indicating the first terminal to send the second measurement configuration information to the second terminal.

24. A second terminal, comprising:

a processing unit for determining reference signal measurements of at least one target cell;

a sending unit, configured to send a reference signal measurement result of the at least one target cell to a first terminal, where the reference signal measurement result of the at least one target cell is used by a network device to which the first terminal accesses to determine whether the second terminal is handed over to one of the at least one target cell;

25. The second terminal in claim 24, further comprising a first receiving unit;

the first receiving unit is used for receiving an indication message from the first terminal;

the processing unit is further configured to release a radio link connection with the first terminal according to the indication message, and establish a connection between the second terminal and the target cell.

26. The second terminal according to claim 24 or 25, further comprising a second receiving unit;

the second receiving unit is configured to receive second measurement configuration information from the first terminal;

the processing unit is specifically configured to: and determining a reference signal measurement result of the target cell according to the second measurement configuration information.

27. The second terminal of claim 26, wherein the second measurement configuration information comprises an identifier of the second terminal, or a link identifier or a link indication corresponding to the second terminal.

28. A network device, comprising:

a receiving unit configured to receive, from a first terminal, a reference signal measurement result of a serving cell of the first terminal determined by the first terminal; and means for receiving, from the first terminal, reference signal measurements of at least one target cell determined by a second terminal;

a processing unit, configured to determine whether the second terminal is handed over to one of the at least one target cell according to the reference signal measurement result of the serving cell and the reference signal measurement result of the target cell;

29. The network device of claim 28, further comprising a first sending unit;

the first sending unit is configured to: when the network device determines that the second terminal is switched to one of the at least one target cell, and the target cell is a cell adjacent to the serving cell, the network device sends context information of the second terminal to the network device managing the target cell.

30. The network device of claim 28, further comprising a second transmitting unit;

the second sending unit is configured to: and sending an indication message to the first terminal, wherein the indication message is used for indicating the second terminal to release the wireless link connection with the first terminal and establish the connection with the target cell.

31. The network device of claim 30, wherein the indication message further comprises first indication information for indicating the second terminal.

32. The network device of claim 31, wherein the first indication information includes an identity of the second terminal; or a link indication or link identification corresponding to the second terminal.

33. The network device of any one of claims 28-32, further comprising a third transmitting unit;

the third sending unit is configured to send, to the first terminal, first measurement configuration information and second measurement configuration information, where the first measurement configuration information is used to instruct the first terminal to determine a reference signal measurement result of the serving cell, and the second measurement configuration information is used to instruct the second terminal to determine a reference signal measurement result of the target cell.

34. The network device according to claim 33, wherein the first measurement configuration information further comprises an identification of the first terminal, and/or wherein the second measurement configuration information further comprises second indication information; wherein the second indication information is used for indicating the first terminal to send the second measurement configuration information to the second terminal.

35. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a computer device, is capable of implementing the method of any one of claims 1 to 6.

36. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a computer device, is capable of implementing the method of any one of claims 7 to 10.

37. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a computer device, is capable of implementing the method of any one of claims 11 to 17.