[0001]The present disclosure relates to the technical field of wireless communication, and in particular to an electronic device in a wireless communication system and a method for performing wireless communication in a wireless communication system. BACKGROUND [0002]This section provides background information relating to the present disclosure, which is not necessarily prior art. [0003] A relay user equipment (UE) is introduced in Release 13 (R13) of a Long Term Evolution-Advanced (LTE-A) system. A remote UE far away from a base station may communicate with the base station via the relay UE, and thus a network coverage can be expanded and a cell edge user speed and a frequency spectrum reuse rate can be improved. The relay UE is a foreground technology of the LTE-A system. Practically, in an actual scenario, the relay UE and the remote UE may move continuously, and in this case, the remote UE needs to perform relay reselection continuously to ensure continuity of a service. The relay reselection may be triggered in the following two cases. In a first case, a quality of a PC5 link between the remote UE and the relay UE becomes poor. In a second case, a quality of a Uu link between the relay UE and the base station becomes poor. In the first case, the quality of the Uu link is good and the quality of the PC5 link becomes poor, and the remote UE triggers the relay reselection process based on the signal quality of the PC5. In this case, service interruption only occurs at the remote UE side, and the relay UE is hardly influenced. In the second case, the quality of the PC5 link is good and the quality of the Uu link becomes Sony China Ref: CNPA15024INOO Originated Country: China poor, and whether to perform relay reselection by the remote UE is under a standardized discussion. [0004] In order to ensure the continuity of the service, it is considered that the remote UE needs to perform the relay reselection process when the quality of the Uu link becomes poor 5 in the present disclosure. Practically, in an actual scenario, the quality of the Uu link becomes poor due to multiple reasons, for example, the relay UE is to perform a handover process or the relay UE is to move out of a coverage of a serving cell. For different reasons resulting in that the quality of the Uu link becomes poor, the remote UE and the relay UE may perform different operations. In the conventional technology, the reasons resulting in that the quality of 10 the Uu link becomes poor are not distinguished, that is, the remote UE cannot know a scenario where the relay UE is located and an operation which the relay UE is to perform. Therefore, it is necessary to put forward a new wireless communication technical solution, such that the remote UE can know the scenario where the relay UE is located, so as to assist the remote UE to perform relay reselection or assist the relay UE to perform relay selection. 15 SUMMARY [0005] This section provides a general summary of the present disclosure, and is not a comprehensive disclosure of its hill scope or all of its features. [0006] An object of the present disclosure is to provide an electronic device in a wireless 20 communication system and a method for performing wireless communication in a wireless communication system, such that the remote UE can know a scenario where a relay UE is located, the relay UE can assist the remote UE to perform relay reselection or the remote UE can assist the relay UE to perform relay selection, thereby improving a system performance and reducing an overhead of an X2 interface. 25 [0007] According to an aspect of the present disclosure, an electronic device in a wireless communication system is provided, which includes one or more processing circuits configured to perform operations of: acquiring scenario identification information, the scenario identification information including first link information indicating a quality of a link between the electronic device and a user equipment in the wireless communication 30 system, second link information indicating a quality of a link between the electronic device -2- and a base station in a serving cell for providing a service for the electronic device in the wireless communication system, received serving cell power change rate information and received neighbor cell power change rate information; and determining, based on the scenario identification information, scenario information on a scenario where the electronic device is located to inform the user equipment, so as to assist the user equipment to perform a relay reselection process or assist the electronic device to perform a relay selection process. " [0008] According to another aspect of the present disclosure, an electronic device in a wireless communication system is provided, which includes: a transceiver configured to send first link information indicating a quality of a link between the electronic device and a relay user equipment providing a relay service for the electronic device in the wireless communication system, to the relay user equipment; and one or more processing circuits configured to perform operations of: acquiring scenario information on a scenario where the relay user equipment is located; and performing a relay reselection process based on the scenario information. [0009] According to another aspect of the present disclosure, a method for performing wireless communication in a wireless communication system is provided, which includes: acquiring scenario identification information, the scenario identification information including first link information indicating a quality of a link between a relay user equipment in the wireless communication system and a remote user equipment in the wireless communication system, second link information indicating a quality of a link between the relay user equipment and a base station in a serving cell for providing a service for the relay user equipment in the wireless communication system, received servicing cell power change rate information and received neighbor cell power change rate information; and determining, based on the scenario identification information, scenario information on a scenario where the relay user equipment is located to inform the remote user equipment, so as to assist the remote user equipment to perform a relay reselection process or assist the relay user equipment to perform a relay selection process. [0010] According to another aspect of the present disclosure, a method for performing wireless communication in a wireless communication system is provided, which includes: sending fust link information indicating a quality of a link between a remote user equipment and a relay user equipment providing a relay service for the remote user equipment in the wireless communication system, to the relay user equipment; acquiring scenario information on a scenario where the relay user equipment is located; and performing a relay reselection process based on the scenario information. [0011] According to another aspect of the present disclosure, a method for performing wireless communication in a wireless communication system is provided, which includes: monitoring a quality of a link between a remote user equipment and a relay user equipment for providing a relay service for the remote user equipment in the wireless communication system; monitoring a quality of a link between the relay user equipment and a base station in a serving cell for providing a service for the relay user equipment and the remote user equipment in the wireless communication system; monitoring a change rate of received power of a neighbor cell and a change rate of received power of the serving cell; when the guality of the link between the remote user equipment and the relay user equipment is greater than a first threshold, the quality of the link between the relay user equipment and the base station is less than a second threshold, and a difference between the change rate of received power of the neighbor cell and the change rate of received power of the serving cell is greater than a third threshold, acquiring information indicating a quality of received signals of a neighbor cell; determining candidate target cells for performing relay reselection for the remote user equipment, based on the information indicating the quality of received signals of the neighbor cell; setting a bias value for each of the candidate cells; and performing a relay reselection process of the remote user equipment based on the bias Vgrue. [0012] With the electronic device in the wireless conmuinication system according to the present disclosure and the method for performing wireless communication in the wireless communication system, the relay UE can determine the scenario where the relay UE is located and notifies the remote UE of the scenario information, such that the relay UE can assist the remote UE to perform relay reselection or the remote UE can assist the relay UE to perform relay selection, thereby improving the system performance and reducing the overhead of the X2 interface. [0013] Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this si\mmary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. [0014] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure. In the drawings: Figure 1(a) is a schematic diagram showing a scenario in which a quality of a Uu link becomes poor; Figure 1(b) is a schematic diagram showing another scenario in which a quality of a Uu link becomes poor; Figure 2 is a block diagram showing a structure of an electronic device in a wireless communication system according to an embodiment of the present disclosure; Figure 3 is a flowchart showing signaling interaction between a source relay user equipment and a remote user equipment in a wireless communication system according to an embodiment of the present disclosure; Figure 4 is a schematic diagram showing a scenario in which a source relay user equipment in a wireless communication system assists a remote user equipment to perform relay reselection according to an embodiment of the present disclosure; Figure 5 is a flowchart showing signaling interaction that an electronic device in a wireless communication system assists a remote user equipment to perform relay reselection according to an embodiment of the present disclosure; Figure 6 is a schematic diagram showing a handover process based on an event A3 according to an embodiment of the present disclosure; Figure 7 is a schematic diagram showing a process that a remote user equipment determines a final relay link and a relay user equipment performs a quick radio link recovery process according to an embodiment of the present disclosure; Figure 8 is a schematic diagram showing a process of determining relay reselection of a remote user equipment based on load conditions of a target relay user equipment according to an embodiment of the present disclosure; Figure 9 is a block diagram showing a structure of another electronic device in a wireless communication system according to an embodiment of the present disclosure; Figure 10 is a flowchart of a wireless communication method according to an embodiment of the present disclosure; Figure 11 is a flowchart of a wireless communication method according to another embodiment of the present disclosure; 5 Figure 12 is a block diagram showing a first example of a schematic configuration of an evolution Node Base Station (eNB) adapting to the present disclosure; Figure 13 is a block diagram showing a second example of the schematic configuration of the eNB adapting to the present disclosure; Figure 14 is a block diagram of an example of a schematic configuration of a smartphone 10 adapting to the present disclosure; and Figure 15 is a block diagram showing an example of a schematic configuration of an automobile navigation device adapting to the present disclosure. [0015] While the present disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings 15 and are herein described in detail. It should be understood, however, that the description herein of specific embodiments is not intended to limit the present disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure. Note that corresponding reference numerals indicate corresponding parts throughout the several views 20 of the drawings o DETAILED DESCRIPTION OF EMBODIMENTS [0016] Examples of the present disclosure will now be described more fully with reference to the accompanying drawings. The following description is merely exemplary in nature and 25 is not intended to limit the present disclosure, application, or uses. [0017] Example embodiments are provided such thatthis disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those -6- skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail. 5 [0018] A user equipment (UE) involved in the present disclosure includes but not limited to terminals with a wireless communication function such as a mobile terminal, a computer, and an on-board device. Further, depending on the described functions, the UE involved in the present disclosure may be the UE itself or a component of the UE such as a chip. In addition, similarly, a base station involved in the present disclosure may be an eNB or a component of 10 the eNB such as a chip. Further, technical solutions according to the present disclosure may be applied to a frequency division duplexing (FDD) system. [0019] The following scenario is considered firstly in the present disclosure. A source relay UE is in a coverage of an eNBl, a remote UE is beyond the coverage of the eNBl, and the remote UE communicates with the eNBl via the source relay UE. Then, the source relay UE 15 and the remote UE start to move, and the source relay UE is always close to the remote UE, that is, a quality of a PC5 link is always good. The source relay UE is increasingly far away from the eNBl and increasingly close to the eNB2, that is, a quality of the Uu link becomes poor. Figure 1(a) shows a specific example of the above scenario. As shown in Figure 1(a), the source relay UE and the remote UE move in two parallel highways. Here, a highway 1 20 indicates a high-speed rail and is in a coverage of the eNB2. A highway 2 is a road around the high-speed rail and is surrounded by mountains and trees and is beyond a coverage of any eNB. It is assumed that the source relay UE and the remote UE move almost with a same speed in a same direction, and a relative speed between them is small. It may be seen from Figure 1(a) that, the source relay UE is always close to the remote UE, it is indicated that the 25 quality of the PC5 link is always good. The source relay UE is increasingly far away from the eNBl and increasingly close to the eNB2, it is indicated that the quality of the Uu link becomes poor and a signal quality of a neighbor cell is increased significantly. During the process, in order to ensure continuity of respective services, the source relay UE is to perform a handover process, that is, switching to a cell covered by the eNB2, and the remote UE is to 30 perform a relay reselection process, that is, reselecting a target relay UE in a coverage of other eNB. -7- [00201 Figure 1(b) is a schematic diagram showing another scenario in which a quality of the Uu link becomes poor. As shown in Figure 1(b), initially, a source relay UE is in a coverage of an eNB, a remote UE is beyond a coverage of the eNB, and the remote UE communicates with the eNB via the source relay UE. Then, the source relay UE starts to 5 move from inside of the coverage of the eNB to outside of the coverage of the eNB, and there is no other eNB around. It may be seen from"Figure 1(b) that, the source relay UE is always close to the remote UE, it is indicated that the quality of the PC5 link is always good. The source relay UE is increasingly far away from the eNB, it is indicated that the quality of the Uu link becomes poor. In addition, a downlink quality of a neighbor cell reduces or hardly 10 changes, that is, the source relay UE is to function as the remote UE. During the process, in order to ensure continuity of respective services, the remote UE is to perform a relay resetection process, that is, reselecting a target relay UE in a coverage of an eNB to assist the remote UE to communicate with the eNB. The source relay UE is to perform a relay selection process, that is, selecting a relay UE in a coverage of an eNB to assist the source relay UE to 15 communicate with the eNB. [0021] In the two scenarios shown in Figure 1(a) and Figure 1(b), if traditional relay selection and relay reselection processes are performed, a specific problem occurs. In the scenario shown in Figure 1(a), when the source relay UE completes the handover process, the remote UE reselects an initial source relay UE with a great probability due to a small relative 20 speed and a short distance between the remote UE and the source relay UE. If this phenomenon often occurs, extra signaling overheads are generated for a network, and electric quantity losses of the source relay UE and the remote UE are generated. Therefore, service interruption of the source relay UE and the remote UE and great signaling overhead will influence the network greatly. In the scenario shown in Figure 1(b), the relay reselection of 25 the remote UE and the relay selection of the source relay UE need multiple times of measurement, consume much time and result in service interruption, therefore it is necessary to shorten the measurement time so as to reduce sendee interruption. [0022] For the above technical problem, a technical solution according to the present disclosure is provided. Figure 2 shows a structure of an electronic device 200 in a wireless 30 communication system according to an embodiment of the present disclosure. [0023] As shown in Figure 2, the electronic device 200 may include a processing circuit -8- 210. It should be noted that, the electronic device 200 may include one processing circuit 210 or multiple processing circuits 210. In addition, the electronic device 200 may include a communication unit 220 as a transceiver and so on. [0024] Further, the processing circuit 210 may include various discrete functional units to perform different functions and/or operations. It should be noted that, the functional units may be physical entities or logical entities, and units with different names may be implemented by a same physical entity. [0025] For example, as shown in Figure 2, the processing circuit 210 may include an acquiring unit 211 and a determining unit 212. [0026] In the electronic device 200 shown in Figure 2, the acquiring unit 211 may acquire scenario identification information. The scenario identification information includes first link information indicating a quality of a link between the electronic device 200 and a user equipment in the wireless communication system, second link information indicating a quality of a link between the electronic device 200 and a base station in a sen'ing cell providing a service for the electronic device 200 in the wireless communication system, received serving cell power change rate information and received neighbor cell power change rate information. [0027] Based on the scenario identification information, the determining unit 212 determines a scenario where the electronic device is located to notify the user equipment, to assist the user equipment to perform a relay reselection process or assist the electronic device to perform the relay selection process. [0028] The electronic device 200 according to the present disclosure may transmit scenario information on the electronic device 200 to a user equipment connected to the electronic device 200, and the electronic device 200 may assist the user equipment to perform a relay reselection process or the user equipment may assist the electronic device 200 to perform a relay selection process, thereby enhancing the relay reselection process of the user equipment and the relay selection process of the electronic device 200, and improving performance of the system. - [0029] According to the embodiment of the present disclosure, the wireless communication system may be an LTE-A cellular communication system, the electronic device 200 may be a source relay UE in the wireless communication system, the user equipment may be a remote UE in the wireless communication system, a link between the electronic device 200 and the user equipment is a PC5 link, and a link between the electronic device 200 and the base station is a Uu link. In addition, the first link information and the second link information indicating link qualities may be one or more of reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), received signal strength indication (RSSI) and channel quality indication (CQI), or may be parameters indicating levels of one or more of RSRP, RSRQ, RSSI and CQI. The received neighbor cell power change rate information may be indicated by a variation of a power of a neighbor cell received by the electronic device 200 in a certain period. Similarly, the received serving cell power change rate information may be indicated by a variation of a power of a serving cell received by the electronic device 200 in a certain period. [0030] According to the embodiment of the present disclosure, the first link information may be measured by the user equipment and is transmitted to the acquiring unit 211 of the electronic device 200. The electronic device 200 may receive the first link information by the communication unit 220. For example, the user equipment may measure and report the first link information periodically or triggered by event. [0031] According to the embodiment of the present disclosure, the second link information, the received serving cell power change rate information and the received neighbor cell power change rate information may be measured by the acquiring unit 211 of the electronic device 200. For example, the acquiring unit 211 of the electronic device 200 may measure the above information periodically or triggered by event. [0032] According to the embodiment of the present disclosure, in a case that the second link information indicates that the quality of the link between the electronic device 200 and the base station is less than a second threshold, the processing circuit 210 generates relay reselection trigger information to instruct the user equipment to perform the relay reselection process. For example, in a case that the electronic device 200 determines RSRPuuthreshoIdl, RSRPUutlu-eshold3, the determining unit 212 may determine that the electronic device 200 is in the first scenario in which the handover process is to be performed. In a case that RSRPSpc5>thresholdl, RSRPUtlmreshoIdl, it is indicated that a quality of a PCS link is good. When the determining unit 212 determines RSRPUuthreshold3, it is indicated that the electronic device 200 is located at an edge of the serving cell and is close to the neighbor cell, and thus the determining unit 212 can determine that the electronic device 200 is in the first scenario in which the handover process is to be performed. Similarly, when the determining unit 212 determines RSRPSpC5>mresh°ldl, it is indicated that a quality of the PC5 link is good. When the determining unit 212 determines RSRPuuthresholdI. Then, the user equipment feeds back the determined result to the acquiring unit 211 of the electronic device 200. Here, one bit of information "Distance Indicator" may be used to indicate the determined result. The "Distance Indicator" is maintained by the user equipment, and is reported to the electronic device 200 periodically or in response to an event. For example, in a case that "Distance Indicator" is equal to "1", it is indicated that RSRPSpc5>tlir'esholdl. In a case that "Distance Indicator" is equal to "0", it is indicated that RSRPspc_5thresholdl occur continuously, the remote UE determines that the change rate -22- Sony China Ref: CNPA15024IN00 Originated Country: China of the PC5 link quality is great. In a case that N2 (N2 is a natural number) events of ARSRPspc5thresholdl, RSRPUllerform handover, the source relay UE can configure different bias values for the neighbor cell and transmit the bias 10 values to the remote UE, such that the remote UE can select a relay UE in a cell to which the source relay UE is to switch as the target relay UE, thereby reducing the overhead of the X2 interface and simplifying the handover process. Further, the remote UE can adjust the hysteresis parameter of the remote UE based on the speed adjustment factor of the source relay UE and/or the change rate of the quality of the link between the remote UE and the 15 source relay UE, such that the hysteresis parameter can be adjusted more accurately. Further, when completing the handover, the source relay UE may transmit handover indication information to the remote UE, such that the remote UE can select an appropriate relay UE to access from the source relay UE and the target relay UE in a case of handover success, and quick RRC reestablishment of the source relay UE can be implemented in a case of handover 20 failure, thereby reducing interruption time. In addition, in the second scenario in which the source relay UE is to perform the relay selection process, the remote UE assists the source relay UE to perform quick relay selection, thereby simplifying the relay selection process and reducing the system signaling overhead. [0136] Subsequently, a method for performing wireless communication in a wireless 25 communication system according to an embodiment of the present disclosure is described with reference to Figure 10. Figure 10 shows a flowchart of a wireless communication method according to an embodiment of the present disclosure. [0137] As shown in Figure 10, firstly, in step SI010, scenario identification information is acquired. The scenario identification information includes first link information indicating a 30 quality of a link between a relay user equipment in the wireless communication system and a remote user equipment in the wireless communication system, second link information -34- Sony China Rcf: CNPA15024IN00 Originated Country: China indicating a quality of a link between the relay user equipment and a base station in a serving cell providing a service for the relay user equipment in the wireless communication system, and received serving cell power change rate information and received neighbor cell power change rate information. 5 [0138] Then, in step SI020, based on the scenario identification information, scenario information on a scenario where the relay user equipment is located is determined to notify a remote user equipment, so as to assist the remote user equipment to perform a relay reselection process or assist the relay user equipment to perform a relay selection process. [0139] Preferably, in a case that the second link information indicates the quality of the link 10 between the relay user equipment and the base station is less than a second threshold, relay reselection trigger information is generated to instruct the remote user equipment to perform the relay reselection process. [0140] Preferably, in a case that the first link information indicates the quality of the link between the relay user equipment and the remote user equipment is greater than a first 15 threshold, the second link information indicates the quality of the Hnk between the relay user equipment and the base station is less than the second threshold, and a difference between a change rate of a received power of a neighbor cell indicated by the received neighbor cell power change rate information and a change rate of a received power of a serving cell indicated by the received serving cell power change rate is greater than a third threshold, it is 20 determined that the relay user equipment, is to perform the handover process. [0141] Preferably, the method further includes: acquiring Time To Trigger TTT length information indicating a length of TTT of a running event A3 or received neighbor cell signal quality information; determining candidate target cells for the remote user equipment based on the TIT length information or the received neighbor cell signal quality information; and 25 setting a bias value for each of the candidate target cells, so as to assist the remote user equipment to select a final target cell providing a service for the remote user equipment after the relay reselection process is performed. [0142] Preferably, the bias value for the candidate target cell is set based on the TTT length information or the received neighbor cell signal quality information. 30 [0143] Preferably, the method further includes: in a case that the second link information -35- indicates the quality of the link between the relay user equipment and the base station is less than the second threshold, acquiring a speed adjustment factor of the relay user equipment, to instruct the remote user equipment to adjust the hysteresis parameter of the remote user equipment. [0144] Preferably, the method further includes: performing a handover process; and generating handover indication information indicating a result of performing the handover process, to instruct the remote user equipment to select a final relay link connection. -{01451 Preferably, the method further includes: in a case that the handover indication information indicates a failure of handover process, acquiring a cell ID of a final target cell providing a service for the remote user equipment after the relay reselection process is performed; determining that the final target cell already causes Time To Trigger TTT of a running event A3, to notify the base station of handover process failure and the cell ID of the final target cell; and performing a radio link recovery process when the Time To Trigger ITT of the running event A3 caused by the final target cell expires, such that the relay user equipment is connected to the final target cell. [0146] Preferably, in a case that the first link information indicates that the quality of the link between the relay user equipment and the remote user equipment is greater than the first threshold, the second link information indicates the quality of the link between the relay user equipment and the base station is less than the second threshold, and the difference between a change rate of a received power of a neighbor cell indicated by the received neighbor cell power change rate information and a change rate of a received power of a serving cell indicated by the received serving cell power change rate information is less than the third threshold, it is determined that the relay user equipment is to perform the relay selection process. [0147] Preferably, the method further includes: acquiring target relay information on a target relay user equipment obtained after the remote user equipment performs the relay reselection process; and performing a relay selection process. The process of performing the relay selection process includes: monitoring a discovery message of the target relay user equipment indicated by the target relay information with a priority; determining that the quality of the link between the target relay user equipment and the relay user equipment is greater than a predetermined threshold; and establishing a relay connection between the target relay user equipment and the relay user equipment. [0148] Preferably, before the process of determining that the quality of the link between the target relay .user equipment and the relay user equipment is greater than a predetermined threshold, the method further.includes: determining that a load factor of the target relay user equipment indicated by the target relay information is less than a predetermined number. The load factor indicates the number of remote user equipments currently accessed to the target relay user equipment. [0149] Preferably, the wireless communication system is an advanced long term evolution (LTE-A) cellular communication system. [0150] Subsequently, a method for performing wireless communication in a wireless communication system according to another embodiment of the present disclosure is described with reference to Figure 11. Figure 11 shows a flowchart of a wireless communication method according to another embodiment of the present disclosure. [0151] As shown in Figure 11, firstly, in step SI 110, a quality of a link between a remote user equipment and a relay user equipment providing a relay service for the remote user equipment in the wireless communication system is monitored. [0152] Subsequently, in step SI 120, scenario information on a scenario where the relay user equipment is located is acquired. [0153] Subsequently, in step SI 130, a relay reselection process is performed based on the scenario information. [0154] Preferably, scenario • information is determined based on scenario identification information. The scenario identification information includes: first link information indicating a quality of a link between the remote user equipment and the relay user equipment, second link information indicating a quality of a link between the relay user equipment and a base station in a serving cell providing a service for the remote user equipment in the wireless communication system, and serving cell power change rate information and neighbor cell power change rate information received by the relay user equipment. [0155] Preferably, the method further includes: in a case that the scenario information indicates that the relay user equipment is in a first scenario in which a handover process is to be performed, acquiring cell IDs of the candidate target ceils and setting a bias value for each of the candidate target cells by the remote user equipment; and determining a target relay user equipment from the candidate target cells based on the bias value. [0156] Preferably, the method further includes: ranking candidate target cells in a descending order based on sizes of the bias values; and performing a relay reselection process on a candidate target relay user equipment in the candidate target cell in an order, until the target relay user equipment is determined. [0157] Preferably, the process of performing the relay reselection process includes: acquiring a link quality value indicating a quality of a link between the remote user equipment and the candidate target relay user equipment in the candidate target cell; adding a bias value corresponding to the candidate target cell to the link quality value of the candidate target relay usee equipment in the candidate target cell, to obtain an adjusted link quality value; and performing the relay reselection process based on the adjusted link quality value. [0158] Preferably, the method further includes: acquiring a speed adjustment factor of the relay user equipment; and adjusting a hysteresis parameter of the remote user equipment based on the speed adjustment factor. [0159] Preferably, the remote user equipment includes a timer configured to start timing when the remote user equipment and the target user equipment establish a connection. The method further includes: when the timer expires, generating a command to disconnect the remote user equipment from the target relay user equipment or disconnect the remote user equipment from the relay user equipment. [0160] Preferably, the method further includes: in a case that the relay ruse equipment receives handover indication information indicating a success of handover process, acquiring a cell ID of a target cell of the relay user equipment; comparing the cell ID of the target cell of the relay user equipment with a cell ID of a serving cell of the target relay user equipment; immediately disconnecting the remote user equipment from the relay user equipment in a case that the two cell IDs are different; in a case that the two cell IDs are the same, acquiring updated first link information before the timer expires, and disconnecting the remote user equipment from the target relay user equipment when the timer expires in a case that the updated first link information indicates that a quality of the updated link between the remote user equipment and the relay user equipment is always greater than a predetermined threshold. [0161] Preferably, the method further includes: in a case that the handover indication information indicating a failure of a handover process is received from the relay user equipment, transmitting a cell ID of a serving cell of the target relay user equipment to the relay user equipment, such that the relay user equipment performs a radio link recovery process to be connected to the serving cell of the target relay user equipment. [0162] Preferably, the method further includes: in a case that the scenario information indicates that the relay user equipment is in a second scenario in which a relay-selection process is to be performed, transmitting target relay information on the target relay user equipment obtained after the relay reselection process is performed to the relay user equipment, to assist the relay user equipment to perform a relay selection process. [0163] Preferably, the wireless communication system is an advanced long term evolution (LTE-A) cellular communication system, and the method is performed by the remote user equipment. WE CLAIM 1. An electronic device in a wireless communication system, comprising: one or more processing circuits configured to perform operations of: acquiring scenario identification information, the scenario identification information comprising first link information indicating a quality of a link between the electronic device and a user equipment in the wireless communication system, second link information indicating a quality of a link between the electronic device and a base station in a serving cell for providing a service for the electronic device in the wireless communication system, received serving cell power change rate information and received neighbor cell power change rate information; and determining, based on the scenario identification information, scenario information on a scenario where the electronic device is located to inform the user equipment, so as to assist the user equipment to perform a relay reselection process or assist the electronic device to perform a relay selection process. 2.The electronic device according to claim 1, wherein the processing circuits generate relay reselection trigger information to instruct the user equipment to perform the relay reselection process when the second link information indicates that the quality of the link between the electronic device and the base station is less than a second threshold. 3. The electronic equipment according to claim 1, wherein the processing circuits determine that the electronic device is to perform a handover process when the first link information indicates that the quality of the link between the electronic device and the user equipment is greater than a first threshold, the second link information indicates that the quality of the link between the electronic device and the base station is less than the second threshold, and a difference between a change rate of the received power of a neighbor cell indicated by the received neighbor cell power change rate information and a change rate of the received power of the serving cell indicated by the received serving cell power change rate information is greater than a third threshold. 4. The electronic device according to claim 3, wherejn the processing circuits are further configured to perform operations of: acquiring Time To Trigger TTT length information Indicating a length of TTT of a running event A3 or received neighbor cell signal quality information; determining candidate target cells for the user equipment based on the TTT length information or the received neighbor cell signal quality information; and setting a bias value for each of the candidate target cells to assist the user equipment to select, from the candidate target cells, a final target cell for providing a service for the user equipment. 5. The electronic device according to claim 4, wherein the bias values of the candidate target cells are set based on the TTT length information 0r the received neighbor cell signal quality information. 6. The electronic device according to claim 1, wherein, in a case that the second link information indicates that the quality of the link between the electronic device and the base station is less than the second threshold, the processing circuits are further configured to perform an operation of: acquiring a speed adjustment factor of the electronic device to instruct the user equipment to adjust a hysteresis parameter of the user equipment. 7. The electronic device according to claim 3, wherein the processing circuits are further configured to perform operations of: performing the handover process; and generating handover indication information to instruct the user equipment to select a final relay link connection, the handover indication information indicating a result of performing the handover process. 8. The electronic device according to claim 7, wherein, in a case that the handover indication information indicates a failure to perform the handover process, the processing circuits are further configured to perform operations of: acquiring a cell ID of the final target cell for providing a service for the user equipment after performing the relay reselection process; determining that the final target cell has caused the Time To Trigger TTT of the running event A3 to inform the base station of the failure to perform the handover process and the cell ID of the final target ceil; and performing a radio link recovery process when the Time To Trigger TTT of the running event A3 caused by the final target cell expires, so that the electronic device is connected to the final target cell. 9. The electronic device according to claim 1, wherein the processing circuits determine that the electronic device is to perform a relay selection process when the first link information indicates that the quality of the link between the electronic device and the user equipment is greater than the first threshold, the second link information indicates that the quality of the link between the electronic device and the base station is less than the second threshold, and a difference between a change rate of the received power of the neighbor cell indicated by the received neighbor cell power change rate information and a change rate of the received power of the serving cell indicated by the received serving cell power change rate information is greater than a third threshold. 10. The electronic device according to claim 9, wherein the processing circuits are further configured to perform operations of: acquiring target relay information on a target relay user equipment obtained after the user equipment performs the relay reselection process; and performing the relay selection process, wherein, when performing the relay selection process, the processing circuits are further configured to perform operations of: monitoring a discovery message of the target relay user equipment indicated by the target relay information with a priority; determining that the quality of the link between the target relay user equipment and the electronic device is greater than a predetermined threshold; and establishing a relay connection between the target relay user equipment and the electronic device. 11. The electronic device according to claim 10, wherein, before determining that the quality of the link between the target relay user equipment and the electronic device is greater than the predetermined threshold, the processing circuits are further configured to perform an operation of: determining that load factors of the target relay user equipment which is indicated by the target relay information are less than a predetermined number, the load factors representing the number of remote user equipments accessing to the target relay user equipment. 12. The electronic device according to any of claims 1 to 11, wherein the wireless coimiiunication system is an advanced long-term evolution (LTE-A) cellular communication system, and the electronic device is relay user equipment in the wireless communication system. 13. An electronic device in a wireless communication system, comprising: one or more processing circuits configured to perform operations of: monitoring a quality of a link between the electronic device and a relay user equipment for providing a relay service for the electronic device in the wireless communication system; acquiring scenario information on a scenario where the relay user equipment is located; and performing a relay reselection process based on the scenario information. 14.-The electronic device according to claim 13, wherein the scenario information is determined based on scenario identification information, the scenario identification information comprises first link information indicating a quality of a link between the electronic device and the relay user equipment, second link information indicating a quality of a link between the relay user equipment and a base station in a serving cell for providing a service for the electronic device in the wireless communication system, and received serving cell power change rate information and received neighbor cell power change rate information received by the relay user equipment. 15. The electronic device according to claim 13, wherein, in a case that the scenario information indicates that the relay user equipment is to perform a handover process, the processing circuits are further configured to perform operations of: acquiring cell IDs of candidate target cells and a bias value set for each of the candidate target cells; and determining a target relay user equipment from the candidate target cells based on the bias value. 16. The electronic device according to claim 15, wherein the processing circuits are further configured to perform operations of: setting a priority of the candidate target cells in accordance with a size of the bias values; and performing the relay reselection process on a candidate target relay user equipment in the candidate target cells in accordance with the priority of the candidate target cells, until the target relay user equipment is determined. 17. The electronic device according to claim 15, wherein, in the process of performing the relay reselection process, the processing circuits are further configured to perform operations of: acquiring a link quality value indicating a quality of a link between the electronic device and a candidate target relay user equipment in the candidate target cells; adding the bias value corresponding to the candidate target cell to the link quality value corresponding to the candidate target relay user equipment in the candidate target cells to obtain an adjusted link quality value; and performing the relay reselection process based on the adjusted link quality value. 18. The electronic device according to claim 13, wherein the processing circuits are further configured to perform operations of: acquiring a speed adjustment factor of the relay user equipment; and adjusting a hysteresis parameter based on the speed adjustment factor. 19. The electronic device according to claim 15, fm-ther comprising: a timer configured to start timing when a connection is established between the electronic device and the target relay user equipment, wherein the processing circuits are further configured to perform an operation of: - when the timer expires, generating a command to disconnect the electronic device from the target relay user equipment or disconnect the electronic device from the relay user equipment. 20. The electronic device according to claim 19, wherein, when the transceiver receives, from the relay user equipment, handover indication information indicating a success of the handover process, the processing circuits are further configured to perform operations of: acquiring a-eell ID of a target cell of the relay user equipment; comparing the cell ID of the target cell of the relay user equipment with a cell ID of a serving cell of the target relay user equipment; when the cell IDs are different, disconnecting the electronic device from the relay user equipment immediately; when the cell IDs are the same, performing operations of: acquiring updated first link information in a duration prior to the expiration of the timer; and when the updated first link information indicates that the updated quality of link between the electronic device and the relay user equipment is always greater than a predetermined threshold, disconnecting the electronic device from the target relay user equipment after the timer expires. 21. The electronic device according to claim 19, wherein, when the transceiver receives, from the relay user equipment, handover indication information indicating a failure of the handover process, the processing circuits are further configured to perform an operation of: instructing the transceiver to send to the relay user equipment the cell ID of the serving cell of the target relay user equipment, so that the relay user equipment performs a radio link recovery process to connect to the serving cell of the target relay user equipment. 22. The electronic device according to claim 13, wherein, when the scenario information indicates that the relay user equipment is to perform the relay selection process, the processing circuits are further configured to perform operations of: instructing the transceiver to send to the relay user equipment the target relay information on the target relay user equipment obtained after performing the relay reselection process, so as to assist the relay user equipment to perform the relay selection process. 23—The electronic device according to any of claims 1-3- to 22, wherein the wireless communication system is an advanced long-term evolution (LTE-A) cellular communication system, and the electronic device is a remote user equipment in the wireless communication system. 24. A method for performing wireless communication in a wireless communication system, comprising: acquiring scenario identification information, the scenario identification information comprising first link information indicating a quality of a link between a relay user equipment in the wireless communication system and a remote user equipment in the wireless communication system, second link information indicating a quality of a link between the relay user equipment and a base station in a serving cell for providing a service for the relay user equipment in the wireless communication system, received serving cell power change rate information and received neighbor cell power change rate information; and determining, based on the scenario identification information, scenario information on a scenario where the relay user equipment is located to inform the remote user equipment, so as to assist the remote user equipment to perform a relay reselection process or assist the relay user equipment to perform a relay selection process. 25. A method for performing wireless communication in a wireless communication system, comprising: monitoring a quality of a link between a remote user equipment and a relay user equipment for providing a relay service for the remote user equipment in the wireless communication system; acquiring scenario information on a scenario where the relay user equipment is located; and performing a relay reselection process based on the scenario information. . 26. A method for performing wireless communication in a wireless communication system, comprising: monitoring a quality of-a link between a remote user equipment and a relay user equipment for providing a service for the remote user equipment in the wireless communication system; monitoring a quality of a link between the relay user equipment and a base station in a serving cell for providing a service for the relay user equipment and the remote user equipment in the wireless communication system; monitoring a change rate of received power of a neighbor cell and a change rate of received power of the serving cell; and when the quality of the link between the remote user equipment and the relay user" equipment is greater than a first threshold, the quality of the link between the relay user equipment and the base station is less than a second threshold, and a difference between the change rate of received power of the neighbor cell and the change rate of received power of the serving cell is greater than a third threshold, acquiring information indicating a quality of received signals of a neighbor cell; deterrnining candidate target cells for performing relay reselection for the remote user equipment, based on the information indicating the quality of received signals of the neighbor cell; -.setting a bias value for each of the candidate target cells; and performing a relay reselection process of the remote user equipment based on the bias value.