WO2022083472A1 - 中继选择和重选的方法、装置及终端 - Google Patents

中继选择和重选的方法、装置及终端 Download PDF

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Publication number
WO2022083472A1
WO2022083472A1 PCT/CN2021/123213 CN2021123213W WO2022083472A1 WO 2022083472 A1 WO2022083472 A1 WO 2022083472A1 CN 2021123213 W CN2021123213 W CN 2021123213W WO 2022083472 A1 WO2022083472 A1 WO 2022083472A1
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Prior art keywords
relay
candidate
terminal
channel quality
target
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PCT/CN2021/123213
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English (en)
French (fr)
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赵亚利
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大唐移动通信设备有限公司
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Publication of WO2022083472A1 publication Critical patent/WO2022083472A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/04Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present disclosure relates to the field of wireless technologies, and in particular, to a method, apparatus and terminal for relay selection and reselection.
  • a current solution for realizing network coverage expansion is to introduce a relay (Relay), where the relay relay may be a terminal with a relay function.
  • the relay relay may be a terminal with a relay function.
  • the interface between the relay and the network uses the Uu interface, and the interface between the relayed UE uses the direct communication interface.
  • the link between the relay and the network may be called a backhaul link (BH) for the UE.
  • BH backhaul link
  • two relayed UEs can perform data transmission through the relaying UE.
  • Bearers in relay scenarios usually include the following three categories:
  • Direct communication interface bearer that is, the bearer between the UE and the relay UE;
  • the end-to-end bearer between the UE and the network device that is, the end-to-end bearer established between the UE and the network device;
  • the bearer of the backhaul link of the UE on the Uu interface that is, the bearer used to carry the data of the UE between the relay UE and the network device.
  • the bearer and the logical channel are in one-to-one correspondence, and the logical channel has a corresponding logical channel identifier.
  • the relay selection/reselection only considers the channel quality of the direct communication interface.
  • the relay with the best channel quality of the direct communication interface is selected as the relay from the UE to the network.
  • the advantage of this selection is that the power of the UE can be saved.
  • this option has certain disadvantages. Because, once direct direct and indirect indirect or indirect/indirect handover occurs, if the source cell and the target cell to which the UE is connected belong to different cells after relay selection/reselection is performed, then the interface interaction process needs to be performed to interact with the UE. Information such as context and switching commands will increase the switching delay.
  • the purpose of the present disclosure is to provide a method, device and terminal for relay selection and reselection, which are used to solve the problem that the source cell and the target cell to which the UE is connected belong to different cells during the relay selection and reselection of the related art, and the UE interacts with each other.
  • Information such as context and switching commands will increase the delay of switching.
  • an embodiment of the present disclosure provides a method for relay selection and reselection, which is applied to a terminal, wherein the method includes:
  • the selected or re-selected target relay is determined according to the preset selection condition
  • the preset selection condition is to preferentially select the relay belonging to the current serving cell of the terminal as the target relay.
  • the method further comprises:
  • the identification information carried in the received relay discovery related message it is determined whether the relay sending the relay discovery related message belongs to the current serving cell of the terminal.
  • the relay discovery related message is a direct communication interface discovery message or a direct communication interface communication message.
  • the identification information includes one or more of the following information:
  • the method, wherein the identification information is carried in any of the following ways:
  • Direct communication interface PC5 radio resource control RRC message
  • the method after determining the selected or reselection target relay, the method further includes:
  • the handover completion indication message needs to carry the cell radio network temporary identifier C-RNTI allocated to the terminal by the current serving cell of the terminal.
  • the method wherein determining the selected or reselected target relay according to a preset selection condition, includes:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the method wherein determining the selected or reselected target relay according to a preset selection condition, includes:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the method wherein selecting a candidate relay from the second candidate relay set as the target relay, further includes:
  • the target relay is further determined according to one of the following principles:
  • a candidate relay is randomly selected from the second candidate relay set as the target relay.
  • the method further comprises:
  • the channel quality of each candidate relay in the first candidate relay set is determined, and the candidate relay with the best channel quality is selected as the target relay.
  • the method wherein determining the selected or reselected target relay according to a preset selection condition, includes:
  • the terminal determines whether the relay belongs to the current service of the terminal according to the relay discovery related message community;
  • the relay belongs to the current serving cell of the terminal, determining that the relay is the target relay;
  • the relay does not belong to the current serving cell of the terminal, continue to receive relay discovery related messages sent by other relays, and determine whether the relay belongs to the current serving cell of the terminal according to the relay discovery related messages community.
  • the method further comprises:
  • the third candidate relay set includes all relays found during the period from when the current channel quality of the terminal is lower than the first threshold to when the current channel quality of the terminal is lower than the second threshold.
  • the second threshold is smaller than the first threshold.
  • the method further comprises:
  • the target relay is further determined according to one of the following principles:
  • the last discovered candidate relay is selected from the third candidate relay set as the target relay.
  • the method wherein the first threshold and the second threshold are determined by network configuration or pre-configuration, respectively.
  • the method wherein the terminal and the network device are connected through a direct Uu interface, and the current channel quality of the terminal is the channel quality of the Uu interface between the terminal and the network device;
  • the terminal is connected to the network device through the relay, and the current channel quality of the terminal includes at least one of the channel quality of the direct communication interface between the terminal and the relay and the channel quality of the Uu interface between the relay and the network device.
  • the method wherein the channel quality of the candidate relay includes at least one of the channel quality of the direct communication interface between the terminal and the candidate relay and the channel quality of the Uu interface between the candidate relay and the network device. one.
  • An embodiment of the present disclosure further provides a terminal, including: a transceiver, a memory, a processor, and program instructions stored in the memory and executable on the processor; wherein the transceiver is controlled by the processor To receive and transmit data, the processor is used to read program instructions in the memory and perform the following operations:
  • the selected or re-selected target relay is determined according to the preset selection condition
  • the preset selection condition is to preferentially select the relay belonging to the current serving cell of the terminal as the target relay.
  • the terminal wherein the processor determines the selected or reselected target relay according to a preset selection condition, including:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the terminal wherein the processor determines the selected or reselected target relay according to a preset selection condition, including:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the terminal wherein the processor determines the selected or reselected target relay according to a preset selection condition, including:
  • the terminal determines whether the relay belongs to the current service of the terminal according to the relay discovery related message community;
  • the relay belongs to the current serving cell of the terminal, determining that the relay is the target relay;
  • the relay does not belong to the current serving cell of the terminal, continue to receive relay discovery related messages sent by other relays, and determine whether the relay belongs to the current serving cell of the terminal according to the relay discovery related messages community.
  • Embodiments of the present disclosure further provide an apparatus for relay selection and reselection, which is applied to a terminal, wherein the apparatus includes:
  • the relay selection module is used to determine the selected or reselected target relay according to the preset selection condition in the process of relay selection or reselection;
  • the preset selection condition is to preferentially select the relay belonging to the current serving cell of the terminal as the target relay.
  • Embodiments of the present disclosure further provide a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute any one of the above steps. Following selection and reselection methods.
  • the relay belonging to the current serving cell of the terminal is preferentially selected as the selected or reselection target relay, so that switching between direct and indirect or indirect to During indirect handover, after relay selection or reselection is performed, the source cell and the target cell to which the UE is connected belong to the same cell, which eliminates the need to perform information exchange processes such as UE context exchange and handover command to reduce handover delay.
  • FIG. 1 is a schematic diagram illustrating a network architecture between a terminal, a relay and a network side device
  • FIG. 2 is a schematic flowchart of a method for relay selection and reselection according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of the first implementation manner of step S210 in an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of Embodiment 2 of step S210 in an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of Embodiment 3 of step S210 in an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of Embodiment 1 of the method described in the present disclosure.
  • FIG. 8 is a schematic flowchart of Embodiment 3 using the method described in the embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of an apparatus for relay selection and reselection according to an embodiment of the present disclosure.
  • the term "and/or" describes the association relationship of associated objects, and indicates that there can be three kinds of relationships. For example, A and/or B can indicate that A exists alone, A and B exist at the same time, and B exists alone these three situations.
  • the character “/” generally indicates that the associated objects are an "or" relationship.
  • the term “plurality” refers to two or more than two, and other quantifiers are similar.
  • the terminal device involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the name of the terminal device may be different.
  • the terminal device may be called user equipment (User Equipment, UE).
  • Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN).
  • RAN Radio Access Network
  • "telephone) and computers with mobile terminal equipment eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • Wireless terminal equipment may also be referred to as system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in the embodiments of the present application.
  • Embodiments of the present disclosure provide a method, device, and terminal for relay selection and reselection, which are used to solve the problem of relay selection and reselection in the related art, generally selecting the relay with the best direct communication interface channel quality as the UE to the network.
  • the source cell and the target cell that the UE connects to belong to different cells, and the exchange of UE context and handover command information will increase the handover delay.
  • the method and the device are conceived based on the same application, and have similar principles for solving problems. Therefore, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated here.
  • a solution for realizing network coverage extension is to refer to a relay relay, which can be a terminal with relay function.
  • a relay relay which can be a terminal with relay function.
  • the interface between the relay UE and the network side equipment uses the Uu interface
  • the interface between the relayed UE also called the remote UE
  • the link between the relay UE and the network side equipment can be called a backhaul link (BH) for the UE (that is, the remote UE);
  • UE-to-UE relay the two intermediate
  • the relay UE may perform data transmission through the relay UE.
  • an embodiment of the present disclosure provides a method for relay selection and reselection, as shown in FIG. 2 , which is applied to a terminal, and the method includes:
  • the preset selection condition is to preferentially select the relay belonging to the current serving cell of the terminal as the target relay.
  • the relay belonging to the current serving cell of the terminal is preferentially selected as the selected or reselection target relay, so that in the event of direct and indirect
  • the source cell and the target cell that the UE is connected to belong to the same cell, so there is no need to perform the process of information exchange such as exchange of UE context and handover commands, so as to reduce handover time delay.
  • the terminals mentioned in the embodiments of the present disclosure are the relayed UEs or the remote UEs, that is, the UEs that need to be connected to the network side equipment through the relay.
  • the method further includes:
  • the identification information carried in the received relay discovery related message it is determined whether the relay sending the relay discovery related message belongs to the current serving cell of the terminal.
  • the relay discovery related message is a direct communication interface discovery message or a direct communication interface communication message.
  • relay discovery related messages are not limited to the above-mentioned messages.
  • the identification information includes one or more of the following information:
  • PLMN Public Land Mobile Network
  • the identification information is carried in any of the following ways:
  • PDU Packet Data Convergence Protocol
  • Radio Link Control Radio Link Control, RLC
  • PDU header Radio Link Control
  • SCI Servicelink Control Information
  • step S210 the selected or reselected target relay is determined according to a preset selection condition, as shown in FIG. 3 , including:
  • S320 determine the channel quality of the candidate relay, and select all candidate relays whose channel quality meets a channel quality threshold as a first candidate relay set;
  • S340 Select one candidate relay from the second candidate relay set as the target relay.
  • step S320 the channel quality of each candidate relay is determined according to the received relay discovery message sent by at least one candidate relay.
  • a candidate relay in the first candidate relay set is determined according to the identification information carried in the relay discovery related message sent by the candidate relays in the first candidate relay set Whether it belongs to the current serving cell of the terminal.
  • all relays whose channel quality satisfies the channel quality threshold are first selected as the first candidate relay set, and then the belonging candidate relay set is selected from the first candidate relay set.
  • the candidate relay in the current serving cell of the terminal is the second candidate relay set, and finally the target relay for relay selection or reselection is determined in the second candidate relay set.
  • step S340 selecting a candidate relay from the second candidate relay set as the target relay, including:
  • the target relay is further determined according to one of the following principles:
  • a candidate relay is randomly selected from the second candidate relay set as the target relay.
  • step S330 after selecting the candidate relay belonging to the current serving cell of the terminal from the first candidate relay set as the second candidate relay set, the method further includes :
  • the channel quality of each candidate relay in the first candidate relay set is determined, and the candidate relay with the best channel quality is selected as the target relay.
  • the above-mentioned method for the target relay for relay selection or reselection in this embodiment is adopted, and the relay belonging to the current serving cell of the terminal is selected as the priority selection condition, and on this basis, the relay belonging to the current serving cell of the terminal is selected.
  • the relay with the best channel quality is selected as the selection condition, so that the relay belonging to the current serving cell of the UE is preferentially selected.
  • it can also ensure that the relay with the best channel quality can be selected, and on the basis of ensuring service transmission, the handover delay can be reduced.
  • step S210 the selected or reselected target relay is determined according to a preset selection condition, as shown in FIG. 4 , including:
  • S430 determine the channel quality of each candidate relay in the first relay set, and select all candidate relays whose channel quality meets a channel quality threshold as a second candidate relay set;
  • step S420 it is determined whether the candidate relay sending the relay discovery related message is a candidate relay belonging to the current serving cell of the terminal according to the identification information carried in the relay discovery related message.
  • At least one candidate relay that sends a relay discovery related message all relays belonging to the current serving cell of the terminal are selected as the first candidate relay set, and then channels are selected in the first candidate relay set All candidate relays whose quality meets the channel quality threshold are used as the second candidate relay set, and finally the target relay for relay selection or reselection is determined in the second candidate relay set.
  • step S440 selecting a candidate relay from the second candidate relay set as the target relay, including:
  • the target relay is further determined according to one of the following principles:
  • a candidate relay is randomly selected from the second candidate relay set as the target relay.
  • step S430 the channel quality of each candidate relay in the first relay set is determined, and after selecting all candidate relays whose channel quality meets the channel quality threshold as the second candidate relay set, the The method also includes:
  • the channel quality of each candidate relay in the first candidate relay set is determined, and the candidate relay with the best channel quality is selected as the target relay.
  • the above-mentioned method of the target relay used for relay selection or reselection in this embodiment is the same as the first embodiment, and also the relay belonging to the current serving cell of the terminal is selected as the priority selection condition to select the channel.
  • the relay with the best quality is used as a secondary selection condition.
  • it can also ensure that the relay with the best channel quality can be selected. Reduce handover delay.
  • step S210 the selected or reselected target relay is determined according to a preset selection condition, as shown in FIG. 5 , including:
  • step S510 it is determined whether the candidate relay that sends the relay discovery related message is a candidate relay belonging to the current serving cell of the terminal according to the identification information carried in the relay discovery related message.
  • the relay discovery related message sent by a relay when the current channel quality of the terminal is lower than the first threshold, and a relay discovery related message sent by a relay is received, it is judged whether the relay belongs to the current serving cell of the terminal, and if it is judged that it belongs to the current serving cell of the terminal If it is determined that it does not belong to the current serving cell of the terminal, it continues to receive relay discovery related messages sent by other relays, and continues to perform relay selection.
  • the method further includes:
  • the third candidate relay set includes all relays found during the period from when the current channel quality of the terminal is lower than the first threshold to when the current channel quality of the terminal is lower than the second threshold.
  • the second threshold is smaller than the first threshold.
  • the terminal when the current channel quality of the terminal is lower than the second threshold, once the terminal finds an available relay, it directly selects the target relay for relay selection or reselection.
  • the method further includes:
  • the target relay is further determined according to one of the following principles:
  • the last discovered candidate relay is selected from the third candidate relay set as the target relay.
  • the first threshold and the second threshold are determined by network configuration or pre-configuration, respectively.
  • the relay belonging to the current serving cell of the terminal is preferentially selected as the target relay for relay selection or reselection;
  • the target relay is selected from all the relays found during the period when the current channel quality of the terminal is lower than the first threshold to when the current channel quality of the terminal is lower than the second threshold, so as to ensure that the service will not be interrupted. Therefore, in this embodiment, on the basis of preferentially selecting the relay belonging to the current serving cell of the UE, the normal transmission of the service can be ensured, and the handover delay can be reduced.
  • the terminal and the network device are connected through a direct Uu interface, and the current channel quality of the terminal is the channel quality of the Uu interface between the terminal and the network device;
  • the terminal is connected to the network device through the relay, and the current channel quality of the terminal includes at least one of the channel quality of the direct communication interface between the terminal and the relay and the channel quality of the Uu interface between the relay and the network device.
  • the channel quality of the candidate relay mentioned includes the direct communication interface between the terminal and the candidate relay at least one of the channel quality of the candidate relay and the channel quality of the Uu interface between the candidate relay and the network device.
  • the number of included candidate relays is at least one respectively.
  • the method further includes:
  • the handover completion indication message needs to carry the cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-Radio Network Temporary Identifier, C- RNTI).
  • Cell-Radio Network Temporary Identifier C-Radio Network Temporary Identifier, C-RNTI
  • the handover complete indication message may be indicated by a radio resource control (Radio Resource Control, RRC) reconfiguration complete message.
  • RRC Radio Resource Control
  • the terminal can carry the C-RNTI in the handover complete instruction message.
  • the relay with the best channel quality of the direct communication interface is selected as the relay from the UE to the network, and the UE connects to the network.
  • the source cell and the target cell belong to different cells, and information such as UE context and handover commands are exchanged, which will increase the handover delay.
  • the method for relay selection and reselection described in the embodiment of the present disclosure is adopted, including:
  • the relay discovery related message is a direct communication interface discovery message or a direct communication interface communication message. According to the identification information carried in the direct communication interface discovery message or the direct communication interface communication message, it is determined whether the relay that sends the relay discovery related message belongs to the current serving cell of the terminal.
  • the identification information includes one or more of the following information:
  • PLMN Public Land Mobile Network
  • the identification information is carried in any of the following ways:
  • PDU Packet Data Convergence Protocol
  • Radio Link Control Radio Link Control, RLC
  • PDU header Radio Link Control
  • SCI Servicelink Control Information
  • the process is also steps S320 to S340 in FIG. 3 , and specifically includes:
  • the relays in the second relay set are used as the relays selected or reselected by the UE.
  • a relay is randomly selected from the second candidate relay set as a target relay.
  • the relay with the best channel quality is selected from the first candidate relay set as the relay selected or reselected by the UE.
  • the connection of the UE will be switched to the relay UE. If the relay UE selected/reselected by the UE belongs to the current serving cell of the UE, there is no need to re-allocate the C-RNTI in the handover command, and the UE may directly carry the C-RNTI used before the handover in the handover complete message.
  • the method for relay selection and reselection described in the embodiment of the present disclosure is adopted, including:
  • the terminal UE receives relay discovery related messages sent by multiple relays;
  • the type of the relay discovery related message and the manner of determining whether the relay belongs to the current serving cell of the UE according to the relay discovery related message are the same as those in the first embodiment, and are not described herein again.
  • the process is also steps S420 to S440 in FIG. 4 , and specifically includes:
  • the relay in the first relay set is used as the target relay selected or reselection by the UE.
  • the number of relays in the first candidate relay set is greater than 1, select a relay as the relay selected or reselected by the UE according to one of the following methods:
  • a relay is randomly selected from the first set of candidate relays.
  • the relay with the best channel quality is selected from all relay UEs discovered by the UE as the target relay selected or reselected by the UE.
  • the connection of the UE will be switched to the relay UE.
  • the relay UE selected/reselected by the UE belongs to the current serving cell of the UE, there is no need to re-allocate the C-RNTI in the handover command, and the UE may directly carry the C-RNTI used before the handover in the handover complete message.
  • the UE discovers a possible relay by receiving a relay discovery related message.
  • the type of the relay discovery related message and the manner of determining whether the relay belongs to the current serving cell of the UE according to the relay discovery related message are the same as those in Embodiment 1 and Embodiment 2, and are not described herein again.
  • the third embodiment determines the target relay for selection or reselection according to the first threshold and the second threshold of the channel quality, and the specific process includes:
  • the terminal UE receives the relay discovery related message sent by the relay;
  • the UE performs relay selection or reselection
  • the UE when the current channel quality of the UE is lower than the first threshold, the UE performs relay discovery, and when a relay is found, it is determined whether the relay belongs to the current serving cell of the UE. If yes, the UE is directly selected as the relay UE, that is, the target relay; otherwise, the relay selection is continued, that is, the following step S830 is performed.
  • the relay selection or reselection is continued according to step S820, and when a relay is found, if it is determined that the relay belongs to the current serving cell of the UE , the UE is directly selected as the target relay; if it is determined that the relay does not belong to the current serving cell of the UE, the relay selection is continued, that is, the following step S850 is performed;
  • the second threshold is smaller than the first threshold
  • the terminal When the current channel quality of the UE is lower than the second threshold, once the terminal finds an available relay, it directly selects the relay as the target relay.
  • the connection of the UE will be switched to the relay UE. If the relay UE selected/reselected by the UE belongs to the current serving cell of the UE, there is no need to re-allocate the C-RNTI in the handover command, and the UE may directly carry the C-RNTI used before the handover in the handover complete message.
  • the relay belonging to the current serving cell of the terminal is preferentially selected as the selected or reselection target relay, so that in the event of direct and indirect
  • the source cell and the target cell that the UE is connected to belong to the same cell, so there is no need to perform the process of information exchange such as exchange of UE context and handover commands, so as to reduce handover time delay.
  • An embodiment of the present disclosure further provides a terminal, as shown in FIG. 9 , including a memory 920, a transceiver 910, a processor 900, and a user interface 930; wherein, in FIG. 9, the bus architecture may include any number of interconnected buses and A bridge, in particular one or more processors, represented by processor 900, and various circuits of memory, represented by memory 920, are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • Transceiver 910 may be a number of elements, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like Transmission medium.
  • the user interface 930 may also be an interface capable of externally connecting a desired device, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.
  • the processor 900 may be a CPU (central processor), an ASIC (Application Specific Integrated Circuit, an application-specific integrated circuit), an FPGA (Field-Programmable Gate Array, a field programmable gate array) or a CPLD (Complex Programmable Logic Device) , complex programmable logic devices), the processor can also use a multi-core architecture.
  • CPU central processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • complex programmable logic devices complex programmable logic devices
  • the processor is configured to execute any one of the methods provided in the embodiments of the present application according to the obtained executable instructions by invoking the computer program stored in the memory.
  • the processor and memory may also be physically separated.
  • the memory 920 is used to store computer programs; the transceiver 910 is used to send and receive data under the control of the processor 900; the processor 900 is used to read the computer program in the memory 920 and perform the following operations :
  • the selected or re-selected target relay is determined according to the preset selection condition
  • the preset selection condition is to preferentially select the relay belonging to the current serving cell of the terminal as the target relay.
  • the processor 900 is further configured to:
  • the identification information carried in the received relay discovery related message it is determined whether the relay sending the relay discovery related message belongs to the current serving cell of the terminal.
  • the relay discovery related message is a direct communication interface discovery message or a direct communication interface communication message.
  • the terminal wherein the identification information includes one or more of the following information:
  • the terminal wherein the identification information is carried in any of the following ways:
  • Direct communication interface PC5 radio resource control RRC message
  • the processor 900 is further configured to:
  • the handover completion indication message needs to carry the cell radio network temporary identifier C-RNTI allocated to the terminal by the current serving cell of the terminal.
  • the terminal wherein the processor 900 determines the selected or reselected target relay according to a preset selection condition, including:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the terminal wherein the processor 900 determines the selected or reselected target relay according to a preset selection condition, including:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the terminal wherein the processor 900 selects a candidate relay from the second candidate relay set as the target relay, further includes:
  • the target relay is further determined according to one of the following principles:
  • a candidate relay is randomly selected from the second candidate relay set as the target relay.
  • the processor 900 is further configured to:
  • the channel quality of each candidate relay in the first candidate relay set is determined, and the candidate relay with the best channel quality is selected as the target relay.
  • the terminal wherein the processor 900 determines the selected or reselected target relay according to a preset selection condition, including:
  • the terminal determines whether the relay belongs to the current service of the terminal according to the relay discovery related message community;
  • the relay belongs to the current serving cell of the terminal, determining that the relay is the target relay;
  • the relay does not belong to the current serving cell of the terminal, continue to receive relay discovery related messages sent by other relays, and determine whether the relay belongs to the current serving cell of the terminal according to the relay discovery related messages community.
  • the processor 900 is further configured to:
  • the third candidate relay set includes all relays found during the period from when the current channel quality of the terminal is lower than the first threshold to when the current channel quality of the terminal is lower than the second threshold.
  • the second threshold is smaller than the first threshold.
  • the processor 900 is further configured to:
  • the target relay is further determined according to one of the following principles:
  • the last discovered candidate relay is selected from the third candidate relay set as the target relay.
  • the first threshold and the second threshold are respectively determined by network configuration or pre-configuration.
  • the terminal wherein the terminal and the network device are connected through a direct Uu interface, and the current channel quality of the terminal is the channel quality of the Uu interface between the terminal and the network device;
  • the terminal is connected to the network device through the relay, and the current channel quality of the terminal includes at least one of the channel quality of the direct communication interface between the terminal and the relay and the channel quality of the Uu interface between the relay and the network device.
  • the terminal wherein the channel quality of the candidate relay includes at least one of the channel quality of the direct communication interface between the terminal and the candidate relay and the channel quality of the Uu interface between the candidate relay and the network device. one.
  • An embodiment of the present disclosure further provides an apparatus for relay selection and reselection, which is applied to a terminal. As shown in FIG. 10 , the apparatus includes:
  • the relay selection module 1010 is configured to determine the selected or reselected target relay according to preset selection conditions in the process of relay selection or reselection;
  • the preset selection condition is to preferentially select the relay belonging to the current serving cell of the terminal as the target relay.
  • the relay selection module 1010 is further configured to:
  • the identification information carried in the received relay discovery related message it is determined whether the relay sending the relay discovery related message belongs to the current serving cell of the terminal.
  • the relay discovery related message is a direct communication interface discovery message or a direct communication interface communication message.
  • the device wherein the identification information includes one or more of the following information:
  • the device wherein the identification information is carried in any of the following ways:
  • Direct communication interface PC5 radio resource control RRC message
  • the relay selection module 1010 is further configured to:
  • the handover completion indication message needs to carry the cell radio network temporary identifier C-RNTI allocated to the terminal by the current serving cell of the terminal.
  • the apparatus wherein the relay selection module 1010 determines the selected or reselected target relay according to a preset selection condition, including:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the apparatus wherein the relay selection module 1010 determines the selected or reselected target relay according to a preset selection condition, including:
  • One candidate relay is selected from the second candidate relay set as the target relay.
  • the apparatus wherein the relay selection module 1010 selects a candidate relay from the second candidate relay set as the target relay, further comprising:
  • the target relay is further determined according to one of the following principles:
  • a candidate relay is randomly selected from the second candidate relay set as the target relay.
  • the relay selection module 1010 is further configured to:
  • the channel quality of each candidate relay in the first candidate relay set is determined, and the candidate relay with the best channel quality is selected as the target relay.
  • the apparatus wherein the relay selection module 1010 determines the selected or reselected target relay according to a preset selection condition, including:
  • the terminal determines whether the relay belongs to the current service of the terminal according to the relay discovery related message community;
  • the relay belongs to the current serving cell of the terminal, determining that the relay is the target relay;
  • the relay does not belong to the current serving cell of the terminal, continue to receive relay discovery related messages sent by other relays, and determine whether the relay belongs to the current serving cell of the terminal according to the relay discovery related messages community.
  • the relay selection module 1010 is further configured to:
  • the third candidate relay set includes all relays found during the period from when the current channel quality of the terminal is lower than the first threshold to when the current channel quality of the terminal is lower than the second threshold.
  • the second threshold is smaller than the first threshold.
  • the relay selection module 1010 is further configured to:
  • the target relay is further determined according to one of the following principles:
  • the last discovered candidate relay is selected from the third candidate relay set as the target relay.
  • the apparatus wherein the first threshold and the second threshold are determined by network configuration or pre-configuration, respectively.
  • the apparatus wherein the terminal and the network device are connected through a direct Uu interface, and the current channel quality of the terminal is the channel quality of the Uu interface between the terminal and the network device;
  • the terminal is connected to the network device through the relay, and the current channel quality of the terminal includes at least one of the channel quality of the direct communication interface between the terminal and the relay and the channel quality of the Uu interface between the relay and the network device.
  • the apparatus wherein the channel quality of the candidate relay includes at least one of the channel quality of the direct communication interface between the terminal and the candidate relay and the channel quality of the Uu interface between the candidate relay and the network device. one.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the related technology, or all or part of the technical solution, and the computer software product is stored in a storage medium.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • a processor processor
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
  • Embodiments of the present disclosure further provide a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute any one of the above steps. Following selection and reselection methods.
  • the processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memory (eg, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)), etc.
  • magnetic storage eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage eg, CD, DVD, BD, HVD, etc.
  • semiconductor memory eg, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.
  • modules can all be implemented in the form of software calling through processing elements; they can also all be implemented in hardware; some modules can also be implemented in the form of calling software through processing elements, and some modules can be implemented in hardware.
  • the determination module may be a separately established processing element, or may be integrated into a certain chip of the above-mentioned device to be implemented, in addition, it may also be stored in the memory of the above-mentioned device in the form of program code, and a certain processing element of the above-mentioned device may Call and execute the function of the above determined module.
  • the implementation of other modules is similar. In addition, all or part of these modules can be integrated together, and can also be implemented independently.
  • the processing element described herein may be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above-mentioned method or each of the above-mentioned modules can be completed by an integrated logic circuit of hardware in the processor element or an instruction in the form of software.
  • each module, unit, sub-unit or sub-module may be one or more integrated circuits configured to implement the above method, such as: one or more Application Specific Integrated Circuit (ASIC), or, one or Multiple microprocessors (digital signal processors, DSP), or, one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), etc.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processors
  • FPGA Field Programmable Gate Array
  • the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processors that can call program codes.
  • CPU central processing unit
  • these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip

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Abstract

本公开提供了一种中继选择和重选的方法、装置及终端。所述方法包括:在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。

Description

中继选择和重选的方法、装置及终端
相关申请的交叉引用
本申请主张在2020年10月22日在中国提交的中国专利申请号No.202011140470.X的优先权,其全部内容通过引用包含于此。
技术领域
本公开涉及无线技术领域,尤其涉及一种中继选择和重选的方法、装置及终端。
背景技术
当前实现网络覆盖扩展的一种解决方案就是引入中继(Relay),其中,中继Relay可以是一个具有中继功能的终端。对于终端UE-to-网络Network Relay,中继和网络之间的接口使用Uu接口,与被中继UE之间的接口使用直接通信接口。中继和网络之间的链路对UE而言可以称为回程链路(Backhaul link,BH)。对于UE-to-UE中继,两个被中继UE可以通过中继UE进行数据传输。
中继场景下的承载通常包括以下三类:
直接通信接口承载:即UE和中继UE之间的承载;
UE和网络设备之间的端到端承载:即UE和网络设备之间建立的端到端承载;
UE在Uu接口回程链路的承载:即中继UE和网络设备之间用于承载UE数据的承载。
无论是哪种类型的承载,承载和逻辑信道都是一一对应的,逻辑信道有对应的逻辑信道标识。
目前,中继选择/重选仅考虑直接通信接口的信道质量,一般选择直接通信接口信道质量最好的中继作为UE到网络的中继,这样选择的好处是可以节省UE的电量。但是如果考虑业务连续性,这种选择方案就存在一定劣势。因为,一旦发生直接direct和非直接indirect或者indirect/indirect切换,如果执行中继选择/重选后,UE连接到的源小区和目标小区归属于不同小区,那 么就需要执行接口交互过程,交互UE上下文context以及切换命令等信息,会增加切换的时延。
发明内容
本公开的目的在于提供一种中继选择和重选的方法、装置及终端,用于解决相关技术中继选择和重选时,UE连接到的源小区和目标小区归属于不同小区,交互UE上下文context以及切换命令等信息,会增加切换的时延的问题。
为了解决上述技术问题,本公开实施例提供一种中继选择和重选的方法,应用于终端,其中,所述方法包括:
在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
可选地,所述的方法,其中,所述方法还包括:
根据所接收的中继发现相关消息中所携带的标识信息,确定发送所述中继发现相关消息的中继是否归属于所述终端当前服务小区。
可选地,所述的方法,其中,所述中继发现相关消息为直接通信接口发现消息或者直接通信接口通信消息。
可选地,所述的方法,其中,所述标识信息包括以下信息中的一个或者多个:
公共陆地移动网络PLMN标识;
小区标识。
可选地,所述的方法,其中,所述标识信息通过如下任一方式携带:
直接通信接口PC5-S消息;
直接通信接口PC5-无线资源控制RRC消息;
直接通信接口分组数据汇聚协议PDCP层协议数据单元PDU头;
直接通信接口无线链路控制RLC层协议数据单元PDU头;
媒体接入控制MAC层协议数据单元PDU头;
物理层直通链路控制信息SCI中。
可选地,所述的方法,其中,在确定所选择或重选的目标中继之后,所述方法还包括:
通过所选择或者重选的目标中继向网络指示切换完成指示消息;
其中,在所述目标中继归属于所述终端当前服务小区时,所述切换完成指示消息中需要携带终端当前服务小区为终端分配的小区无线网络临时标识C-RNTI。
可选地,所述的方法,其中,根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的方法,其中,根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第一候选中继集合;
确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的方法,其中,从所述第二候选中继集合中选择一个候选中继作为所述目标中继,还包括:
若所述第二候选中继集合中的候选中继个数为1,则直接选择所述第二候选中继集合中的候选中继作为所述目标中继;
若所述第二候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第二候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
从所述第二候选中继集合中随机选择一个候选中继作为所述目标中继。
可选地,所述的方法,其中,所述方法还包括:
若所述第二候选中继集合中的候选中继个数为零,则确定所述第一候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继。
可选地,所述的方法,其中,根据预设选择条件确定所选择或重选的目标中继,包括:
在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区。
可选地,所述的方法,其中,所述方法还包括:
若所述终端当前信道质量低于第二门限,则确定第三候选中继集合,并从所述第三候选中继集合中选择一个候选中继作为目标中继;其中,所述第三候选中继集合包括从所述终端当前信道质量低于第一门限到所述终端当前信道质量低于第二门限期间发现的所有中继。
其中,所述第二门限小于所述第一门限。
可选地,所述的方法,其中,所述方法还包括:
若所述第三候选中继集合中的候选中继个数为1,则直接选择所述第三候选中继集合中的候选中继作为所述目标中继;
若所述第三候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第三候选中继集合中每个候选中继的信道质量,选择信道质量 最好的候选中继作为所述目标中继;
从所述第三候选中继集合中随机选择一个候选中继作为所述目标中继;
从所述第三候选中继集合中选择最后发现的候选中继作为所述目标中继。
可选地,所述的方法,其中,所述第一门限和所述第二门限分别由网络配置或预配置确定。
可选地,所述的方法,其中,所述终端和网络设备通过直接Uu接口连接,所述终端当前信道质量为所述终端与网络设备之间Uu接口的信道质量;或者
所述终端通过中继和网络设备连接,所述终端当前信道质量包括终端与中继之间直接通信接口的信道质量、中继与网络设备之间Uu接口的信道质量中的至少之一。
可选地,所述的方法,其中,所述候选中继的信道质量包括终端与候选中继之间直接通信接口的信道质量、候选中继与网络设备之间Uu接口的信道质量中的至少之一。
本公开实施例还提供一种终端,包括:收发机、存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序指令;其中,所述收发机在处理器的控制下接收和发送数据,所述处理器用于读取存储器中的程序指令,执行下列操作:
在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
可选地,所述的终端,其中,所述处理器根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的终端,其中,所述处理器根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第一候选中继集合;
确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的终端,其中,所述处理器根据预设选择条件确定所选择或重选的目标中继,包括:
在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区。
本公开实施例还提供一种中继选择和重选的装置,应用于终端,其中,所述装置包括:
中继选择模块,用于在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
本公开实施例还提供一种处理器可读存储介质,其中,所述处理器可读存储介质存储有计算机程序,所述计算机程序用于使所述处理器执行如上任一项所述的中继选择和重选的方法。
本公开的上述技术方案的有益效果如下:
上述方案中,在中继选择或重选的过程中,通过优先选择归属于终端当前服务小区的中继作为所选择或重选的目标中继,使得在发生direct和indirect之间切换或者indirect至indirect切换时,在执行中继选择或重选后,UE连接到的源小区和目标小区属于同一小区,这样无需执行交互UE上下文以及切换命令等信息交互的过程,以降低切换时延。
附图说明
图1为说明终端、中继与网络侧设备之间的网络架构示意图;
图2为本公开实施例所述的中继选择和重选的方法的流程示意图;
图3为本公开实施例中,步骤S210的实施方式一的流程示意图;
图4为本公开实施例中,步骤S210的实施方式二的流程示意图;
图5为本公开实施例中,步骤S210的实施方式三的流程示意图;
图6为采用本公开所述方法的实施例一流程示意图;
图7为采用本公开所述方法的实施例二流程示意图;
图8为采用本公开实施例所述方法的实施例三流程示意图;
图9为本公开实施例所述终端的结构示意图;
图10为本公开实施例所述的中继选择和重选的装置的结构示意图。
具体实施方式
本公开实施例中术语“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
本申请实施例中术语“多个”是指两个或两个以上,其它量词与之类似。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,并不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本公开实施例涉及的终端设备,可以是指向用户提供语音和/或数据连通性的设备,具有无线连接功能的手持式设备、或连接到无线调制解调器的其 他处理设备等。在不同的系统中,终端设备的名称可能也不相同,例如在5G系统中,终端设备可以称为用户设备(User Equipment,UE)。无线终端设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network,CN)进行通信,无线终端设备可以是移动终端设备,如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机,例如,可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置,它们与无线接入网交换语言和/或数据。例如,个人通信业务(Personal Communication Service,PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol,SIP)话机、无线本地环路(Wireless Local Loop,WLL)站、个人数字助理(Personal Digital Assistant,PDA)等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station),移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户装置(user device),本申请实施例中并不限定。
本公开实施例提供了一种中继选择和重选的方法、装置及终端,用于解决相关技术中继选择和重选时,通常选择直接通信接口信道质量最好的中继作为UE到网络的中继,UE连接到的源小区和目标小区归属于不同小区,交互UE上下文context以及切换命令等信息,会增加切换的时延的问题。
其中,方法和装置是基于同一申请构思的,有于方法和装置解决问题的原理相似,因此装置和方法的实施可以相互参见,重复之处不再赘述。
为使本公开要解决的技术问题、技术方案和优点更加清楚,下面将结合附图及具体实施例进行详细描述。
实现网络覆盖扩展的一种解决方案是引用中继Relay,中继可以是一个具有中继功能的终端。如图1所示,对于UE-to-Network中继,中继UE与网络侧设备之间的接口使用Uu接口,与被中继UE(也可以称为远端UE)之间的接口使用直接通信接口。中继UE与网络侧设备之间的链路对UE(也即为远端UE)而言可以称为回程链路(Backhaul link,BH);对于UE-to-UE中继,两个被中继UE可以通过中继UE进行数据传输。
目前,在中继选择和重选时,仅考虑直接通信接口的信道质量,但在发 生direct和indirect之间切换或者indirect至indirect切换时,在执行中继选择或重选后,UE连接到的源小区和目标小区归属于不同小区,那么就需要执行接口交互过程,交互UE上下文以及切换命令等信息,会增加切换的时延。
为解决该技术问题,本公开实施例提供一种中继选择和重选的方法,如图2所示,应用于终端,所述方法包括:
S210,在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
采用本公开实施例所述方法,在中继选择或重选的过程中,通过优先选择归属于终端当前服务小区的中继作为所选择或重选的目标中继,使得在发生direct和indirect之间切换或者indirect至indirect切换时,在执行中继选择或重选后,UE连接到的源小区和目标小区属于同一小区,这样无需执行交互UE上下文以及切换命令等信息交互的过程,以降低切换时延。
本公开实施例中,没有特殊说明,本公开实施例所提及的终端即为被中继UE或远端UE,也即需要通过中继连接至网络侧设备的UE。
可选地,所述方法还包括:
根据所接收的中继发现相关消息中所携带的标识信息,确定发送所述中继发现相关消息的中继是否归属于所述终端当前服务小区。
其中,所述中继发现相关消息为直接通信接口发现消息或者直接通信接口通信消息。
需要说明的是,中继发现相关消息也不限于仅能够为上述的消息。
可选地,所述标识信息包括以下信息中的一个或者多个:
公共陆地移动网络(Public Land Mobile Network,PLMN)标识;
小区标识。
可选地,所述标识信息通过如下任一方式携带:
直接通信接口PC5-S消息;
直接通信接口PC5-无线资源控制(Radio Resource Control,RRC)消息;
直接通信接口分组数据汇聚协议(Packet Data Convergence Protocol, PDCP)层协议数据单元(Protocol Data Unit,PDU)头;
直接通信接口无线链路控制(Radio Link Control,RLC)层协议数据单元PDU头;
媒体接入控制(Media Access Control,MAC)层协议数据单元PDU头;
物理层直通链路控制信息(Sidelink Control Information,SCI)中。
本公开实施例中,其中一实施方式,在步骤S210,根据预设选择条件确定所选择或重选的目标中继,如图3所示,包括:
S310,接收至少一个候选中继发送的中继发现相关消息;
S320,确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
S330,从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
S340,从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
具体地,在步骤S320,根据所接收的至少一个候选中继发送的中继发现消息,确定每一候选中继的信道质量。
该实施方式中,可选地,在步骤S330,根据第一候选中继集合中的候选中继发送的中继发现相关消息所携带的标识信息,确定第一候选中继集合中的候选中继是否为归属于终端当前服务小区。
该实施方式,在发送中继发现相关消息的至少一个候选中继中,先选择信道质量满足信道质量门限的所有中继作为第一候选中继集合,之后在第一候选中继集合中选择归属于终端当前服务小区的候选中继为第二候选中继集合,最后在第二候选中继集合中确定用于中继选择或重选的目标中继。
可选地,在步骤S340,从所述第二候选中继集合中选择一个候选中继作为所述目标中继,包括:
若所述第二候选中继集合中的候选中继个数为1,则直接选择所述第二候选中继集合中的候选中继作为所述目标中继;
若所述第二候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第二候选中继集合中每个候选中继的信道质量,选择信道质量 最好的候选中继作为所述目标中继;
从所述第二候选中继集合中随机选择一个候选中继作为所述目标中继。
可选地,所述的方法,在步骤S330,从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合之后,所述方法还包括:
若所述第二候选中继集合中的候选中继个数为零,则确定所述第一候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继。
采用该实施方式中的上述用于中继选择或重选的目标中继的方式,以选择归属于所述终端当前服务小区的中继作为优先选择条件,在此基础上,归属于终端当前服务小区的中继为至少两个时,或不存在归属于终端当前服务小区的中继时,以选择信道质量最好的中继作为选择条件,这样在优先选择归属于UE当前服务小区的中继基础上,也能够保证能够选择到信道质量最好的中继,在保证业务传输的基础上,能够降低切换时延。
本公开实施例中,另一实施方式,在步骤S210,根据预设选择条件确定所选择或重选的目标中继,如图4所示,包括:
S410,接收至少一个候选中继发送的中继发现相关消息;
S420,从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第一候选中继集合;
S430,确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合;
S440,从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
该实施方式中,可选地,在步骤S420,根据中继发现相关消息中携带的标识信息,确定发送中继发现相关消息的候选中继是否为归属于终端当前服务小区的候选中继。
该实施方式,在发送中继发现相关消息的至少一个候选中继中,先选择归属于终端当前服务小区的所有中继作为第一候选中继集合,之后在第一候选中继集合中选择信道质量满足信道质量门限的所有候选中继作为第二候选中继集合,最后在第二候选中继集合中确定用于中继选择或重选的目标中继。
可选地,在步骤S440,从所述第二候选中继集合中选择一个候选中继作为所述目标中继,包括:
若所述第二候选中继集合中的候选中继个数为1,则直接选择所述第二候选中继集合中的候选中继作为所述目标中继;
若所述第二候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第二候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
从所述第二候选中继集合中随机选择一个候选中继作为所述目标中继。
可选地,在步骤S430,确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合之后,所述方法还包括:
若所述第二候选中继集合中的候选中继个数为零,则确定所述第一候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继。
采用该实施方式中的上述用于中继选择或重选的目标中继的方式,与实施方式一相同,同样以选择归属于所述终端当前服务小区的中继作为优先选择条件,以选择信道质量最好的中继作为次要选择条件,在优先选择归属于UE当前服务小区的中继基础上,也能够保证能够选择到信道质量最好的中继,在保证业务传输的基础上,能够降低切换时延。
本公开实施例中,再一实施方式,在步骤S210,根据预设选择条件确定所选择或重选的目标中继,如图5所示,包括:
S510,在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
S520,若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
S530,若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否 归属于所述终端当前服务小区。
可选地,该实施方式中,在步骤S510,根据中继发现相关消息中携带的标识信息,确定发送中继发现相关消息的候选中继是否为归属于终端当前服务小区的候选中继。
采用该实施方式,在终端当前信道质量低于第一门限时,接收到一个中继发送的中继发现相关消息,就判断该中继是否归属于终端当前服务小区,如果判断为属于终端当前服务小区,则直接选择该中继为用于选择或重选的目标中继;如果判断为不属于终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,继续执行中继选择。
可选地,所述方法还包括:
若所述终端当前信道质量低于第二门限,则确定第三候选中继集合,并从所述第三候选中继集合中选择一个候选中继作为目标中继;其中,所述第三候选中继集合包括从所述终端当前信道质量低于第一门限到所述终端当前信道质量低于第二门限期间发现的所有中继。
其中,所述第二门限小于所述第一门限。
采用该方式,当终端的当前信道质量低于第二门限时,终端一旦发现可用中继,则直接选择目标中继进行中继选择或重选。
可选地,所述方法还包括:
若所述第三候选中继集合中的候选中继个数为1,则直接选择所述第三候选中继集合中的候选中继作为所述目标中继;
若所述第三候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第三候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
从所述第三候选中继集合中随机选择一个候选中继作为所述目标中继;
从所述第三候选中继集合中选择最后发现的候选中继作为所述目标中继。
该实施方式中,可选地,所述第一门限和所述第二门限分别有网络配置或预配置确定。
采用该实施方式,在终端的当前信道低于第一门限,但还没有达到第二 门限时,优先选择归属于终端当前服务小区的中继作为中继选择或重选的目标中继;当低于第二门限时,则从终端当前信道质量低于第一门限到所述终端当前信道质量低于第二门限期间发现的所有中继中选择目标中继,以保证业务不会中断。因此该实施方式,在以优先选择归属于UE当前服务小区的中继的基础上,能够保证业务的正常传输,并降低切换时延。
需要说明的是,该实施方式中,终端和网络设备通过直接Uu接口连接,所述终端当前信道质量为所述终端与网络设备之间Uu接口的信道质量;或者
所述终端通过中继和网络设备连接,所述终端当前信道质量包括终端与中继之间直接通信接口的信道质量、中继与网络设备之间Uu接口的信道质量中的至少之一。
另外,需要说明的是,本公开实施例所述中继选择和重选地方法,上述的各个实施方式中,所提及的候选中继的信道质量包括终端与候选中继之间直接通信接口的信道质量、候选中继与网络设备之间Uu接口的信道质量中的至少之一。
另一方面,所提及的第一候选中继集合、第二候选中继集合和第三候选中继集合中,所包括的候选中继的数量分别为至少一个。
本公开实施例所述中继选择和重选的方法,可选地的,在步骤S210之后,所述方法还包括:
通过所选择或者重选的目标中继向网络指示切换完成指示消息;
其中,在所述目标中继归属于所述终端当前服务小区时,所述切换完成指示消息中需要携带终端当前服务小区为终端分配的小区无线网络临时标识(Cell-Radio Network Temporary Identifier,C-RNTI)。
可选地,切换完成指示消息可以通过无线资源控制(Radio Resource Control,RRC)重配完成消息指示。
具体地,若终端选择或重选的中继归属于终端当前服务小区,则切换命令中无需重新分配C-RNTI,通过终端在切换完成指示消息中携带C-RNTI即可。
采用本公开实施例所述中继选择和重选的方法,能够解决相关技术中继 选择和重选时,通常选择直接通信接口信道质量最好的中继作为UE到网络的中继,UE连接到的源小区和目标小区归属于不同小区,交互UE上下文context以及切换命令等信息,会增加切换的时延的问题。
以下对采用本公开实施例所述方法的上述各实施方式进行举例说明。
实施例一
该实施例一中,如图6所示,采用本公开实施例所述中继选择和重选的方法,包括:
S610,多个中继分别向终端UE发送中继发现相关消息;
可选地,中继发现相关消息为直接通信接口发现消息或者直接通信接口通信消息。根据直接通信接口发现消息或者直接通信接口通信消息所携带的标识信息,确定发送所述中继发现相关消息的中继是否归属于所述终端当前服务小区。
其中,所述标识信息包括以下信息中的一个或者多个:
公共陆地移动网络(Public Land Mobile Network,PLMN)标识;
小区标识。
所述标识信息通过如下任一方式携带:
直接通信接口PC5-S消息;
直接通信接口PC5-无线资源控制(Radio Resource Control,RRC)消息;
直接通信接口分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)层协议数据单元(Protocol Data Unit,PDU)头;
直接通信接口无线链路控制(Radio Link Control,RLC)层协议数据单元PDU头;
媒体接入控制(Media Access Control,MAC)层协议数据单元PDU头;
物理层直通链路控制信息(Sidelink Control Information,SCI)中。
S620,根据所接收的中继发现相关消息,确定UE选择或重选的目标中继。
具体地,根据图6并结合图3所示,该过程也即为图3的步骤S320至S340,具体包括:
确定满足信道质量条件的第一候选中继集合;
从第一候选中继集合中选择归属于所述UE当前服务小区的第二候选中继集合;
确定UE选择或者重选的目标中继。
其中,若第二候选中继集合中的中继个数等于1,则将所述第二中继集合中的中继作为所述UE选择或者重选的中继。
若第二候选中继集合中的中继个数大于1,则依据如下方式之一选择一个中继作为所述UE选择或者重选的目标中继:
选择第二候选中继集合中信道质量最好的中继为目标中继。
从所述第二候选中继集合中随机选择一个中继为目标中继。
若第二候选中继集合中的中继个数等于0,则从第一候选中继集合中选择信道质量最好的中继作为所述UE选择或者重选的中继。
若UE选择或重选了中继UE之后,UE的连接会切换到所述中继UE。若UE选择/重选的中继UE归属于所述UE当前服务小区,则切换命令中无需重新分配C-RNTI,UE在切换完成消息中直接携带切换之前使用的C-RNTI即可。
实施例二
该实施例二中,如图7所示,采用本公开实施例所述中继选择和重选的方法,包括:
S710,终端UE接收多个中继发送的中继发现相关消息;
其中,中继发现相关消息的类型,以及根据中继发现相关消息确定中继是否属于UE当前服务小区的方式,与实施例一相同,在此不再说明。
S720,根据所接收的中继发现相关消息,确定UE选择或重选的目标中继。
具体地,根据图7并结合图4所示,该过程也即为图4的步骤S420至S440,具体包括:
从UE发现的所有中继UE中选择归属于所述UE当前服务小区的中继,作为第一候选中继集合;
确定UE选择或者重选的目标中继:
其中,若第一候选中继集合中的中继个数等于1,则将所述第一中继集合 中的中继作为所述UE选择或者重选的目标中继。
若第一候选中继集合中的中继个数大于1,则依据如下方式之一选择一个中继作为所述UE选择或者重选的中继:
选择第一候选中继集合中信道质量最好的中继。
从所述第一候选中继集合中随机选择一个中继。
若第一候选中继集合中的中继个数等于0,则从UE发现的所有中继UE中选择选择信道质量最好的中继作为所述UE选择或者重选的目标中继。
若UE选择或重选了中继UE之后,UE的连接会切换到所述中继UE。
若UE选择/重选的中继UE归属于所述UE当前服务小区,则切换命令中无需重新分配C-RNTI,UE在切换完成消息中直接携带切换之前使用的C-RNTI即可。
实施例三
该实施例三中,如图8所示,与实施例一与实施例二相同,UE通过接收中继发现相关消息,发现可能的中继。具体地,中继发现相关消息的类型,以及根据中继发现相关消息确定中继是否属于UE当前服务小区的方式,与实施例一和实施例二相同,在此不再说明。
其中,结合图8和图5,该实施例三根据信道质量的第一门限和第二门限,确定用于选择或重选的目标中继,具体过程包括:
S810,终端UE接收中继发送的中继发现相关消息;
S820,UE进行中继选择或重选;
其中,在UE当前信道质量低于第一门限时,UE执行中继发现,当发现一个中继时,判断所述中继是否属于所述UE当前服务小区。如果是,则直接选择该UE作为中继UE,也即为目标中继;否则,继续执行中继选择,也即执行以下的步骤S830。
S830,继续接收中继发现相关消息;
S840,UE进行中继选择或重选;
若UE当前信道质量低于第一门限,但高于第二门限,则依据步骤S820继续执行中继选择或重选,发现一个中继时,若判断所述中继属于所述UE当前服务小区,则直接选择该UE为目标中继;若判断所述中继不属于所述UE 当前服务小区,则继续执行中继选择,也即执行以下的步骤S850;
结合图5并参阅以上的描述,该第二门限小于第一门限;
S850,继续接收中继发现相关消息;
S860,UE进行中继选择或重选;
当UE当前信道质量低于第二门限时,所述终端一旦发现一个可用中继,则直接选择所述中继为目标中继。
若UE选择或重选了中继UE之后,UE的连接会切换到所述中继UE。若UE选择/重选的中继UE归属于所述UE当前服务小区,则切换命令中无需重新分配C-RNTI,UE在切换完成消息中直接携带切换之前使用的C-RNTI即可。
采用本公开实施例所述方法,在中继选择或重选的过程中,通过优先选择归属于终端当前服务小区的中继作为所选择或重选的目标中继,使得在发生direct和indirect之间切换或者indirect至indirect切换时,在执行中继选择或重选后,UE连接到的源小区和目标小区属于同一小区,这样无需执行交互UE上下文以及切换命令等信息交互的过程,以降低切换时延。
本公开实施例还提供一种终端,如图9所示,包括存储器920,收发机910,处理器900以及用户接口930;其中,在图9中,总线架构可以包括任意数量的互联的总线和桥,具体有处理器900代表的一个或多个处理器和存储器920代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机910可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元,这些传输介质包括,这些传输介质包括无线信道、有线信道、光缆等传输介质。针对不同的用户设备,用户接口930还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器900负责管理总线架构和通常的处理,存储器920可以存储处理器900在执行操作时所使用的数据。
可选的,处理器900可以是CPU(中央处埋器)、ASIC(Application Specific  Integrated Circuit,专用集成电路)、FPGA(Field-Programmable Gate Array,现场可编程门阵列)或CPLD(Complex Programmable Logic Device,复杂可编程逻辑器件),处理器也可以采用多核架构。
处理器通过调用存储器存储的计算机程序,用于按照获得的可执行指令执行本申请实施例提供的任一所述方法。处理器与存储器也可以物理上分开布置。
具体的,存储器920,用于存储计算机程序;收发机910,用于在所述处理器900的控制下收发数据;处理器900,用于读取所述存储器920中的计算机程序并执行以下操作:
在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
可选地,所述的终端,其中,处理器900还用于:
根据所接收的中继发现相关消息中所携带的标识信息,确定发送所述中继发现相关消息的中继是否归属于所述终端当前服务小区。
可选地,所述的终端,其中,所述中继发现相关消息为直接通信接口发现消息或者直接通信接口通信消息。
可选地,所述的终端,其中,所述标识信息包括以下信息中的一个或者多个:
公共陆地移动网络PLMN标识;
小区标识。
可选地,所述的终端,其中,所述标识信息通过如下任一方式携带:
直接通信接口PC5-S消息;
直接通信接口PC5-无线资源控制RRC消息;
直接通信接口分组数据汇聚协议PDCP层协议数据单元PDU头;
直接通信接口无线链路控制RLC层协议数据单元PDU头;
媒体接入控制MAC层协议数据单元PDU头;
物理层直通链路控制信息SCI中。
可选地,所述的终端,其中,在确定所选择或重选的目标中继之后,所述处理器900还用于:
通过所选择或者重选的目标中继向网络指示切换完成指示消息;
其中,在所述目标中继归属于所述终端当前服务小区时,所述切换完成指示消息中需要携带终端当前服务小区为终端分配的小区无线网络临时标识C-RNTI。
可选地,所述的终端,其中,处理器900根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的终端,其中,处理器900根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第一候选中继集合;
确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的终端,其中,处理器900从所述第二候选中继集合中选择一个候选中继作为所述目标中继,还包括:
若所述第二候选中继集合中的候选中继个数为1,则直接选择所述第二候选中继集合中的候选中继作为所述目标中继;
若所述第二候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第二候选中继集合中每个候选中继的信道质量,选择信道质量 最好的候选中继作为所述目标中继;
从所述第二候选中继集合中随机选择一个候选中继作为所述目标中继。
可选地,所述的终端,其中,处理器900还用于:
若所述第二候选中继集合中的候选中继个数为零,则确定所述第一候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继。
可选地,所述的终端,其中,处理器900根据预设选择条件确定所选择或重选的目标中继,包括:
在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区。
可选地,所述的终端,其中,处理器900还用于:
若所述终端当前信道质量低于第二门限,则确定第三候选中继集合,并从所述第三候选中继集合中选择一个候选中继作为目标中继;其中,所述第三候选中继集合包括从所述终端当前信道质量低于第一门限到所述终端当前信道质量低于第二门限期间发现的所有中继。
其中,所述第二门限小于所述第一门限。
可选地,所述的终端,其中,处理器900还用于:
若所述第三候选中继集合中的候选中继个数为1,则直接选择所述第三候选中继集合中的候选中继作为所述目标中继;
若所述第三候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第三候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
从所述第三候选中继集合中随机选择一个候选中继作为所述目标中继;
从所述第三候选中继集合中选择最后发现的候选中继作为所述目标中继。
可选地,所述的终端,其中,所述第一门限和所述第二门限分别有网络配置或预配置确定。
可选地,所述的终端,其中,所述终端和网络设备通过直接Uu接口连接,所述终端当前信道质量为所述终端与网络设备之间Uu接口的信道质量;或者
所述终端通过中继和网络设备连接,所述终端当前信道质量包括终端与中继之间直接通信接口的信道质量、中继与网络设备之间Uu接口的信道质量中的至少之一。
可选地,所述的终端,其中,所述候选中继的信道质量包括终端与候选中继之间直接通信接口的信道质量、候选中继与网络设备之间Uu接口的信道质量中的至少之一。
本公开实施例还提供一种中继选择和重选的装置,应用于终端,如图10所示,所述装置包括:
中继选择模块1010,用于在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
可选地,所述的装置,其中,中继选择模块1010还用于:
根据所接收的中继发现相关消息中所携带的标识信息,确定发送所述中继发现相关消息的中继是否归属于所述终端当前服务小区。
可选地,所述的装置,其中,所述中继发现相关消息为直接通信接口发现消息或者直接通信接口通信消息。
可选地,所述的装置,其中,所述标识信息包括以下信息中的一个或者多个:
公共陆地移动网络PLMN标识;
小区标识。
可选地,所述的装置,其中,所述标识信息通过如下任一方式携带:
直接通信接口PC5-S消息;
直接通信接口PC5-无线资源控制RRC消息;
直接通信接口分组数据汇聚协议PDCP层协议数据单元PDU头;
直接通信接口无线链路控制RLC层协议数据单元PDU头;
媒体接入控制MAC层协议数据单元PDU头;
物理层直通链路控制信息SCI中。
可选地,所述的装置,其中,在确定所选择或重选的目标中继之后,中继选择模块1010还用于:
通过所选择或者重选的目标中继向网络指示切换完成指示消息;
其中,在所述目标中继归属于所述终端当前服务小区时,所述切换完成指示消息中需要携带终端当前服务小区为终端分配的小区无线网络临时标识C-RNTI。
可选地,所述的装置,其中,中继选择模块1010根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的装置,其中,中继选择模块1010根据预设选择条件确定所选择或重选的目标中继,包括:
接收至少一个候选中继发送的中继发现相关消息;
从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第一候选中继集合;
确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合;
从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
可选地,所述的装置,其中,中继选择模块1010从所述第二候选中继集 合中选择一个候选中继作为所述目标中继,还包括:
若所述第二候选中继集合中的候选中继个数为1,则直接选择所述第二候选中继集合中的候选中继作为所述目标中继;
若所述第二候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第二候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
从所述第二候选中继集合中随机选择一个候选中继作为所述目标中继。
可选地,所述的装置,其中,中继选择模块1010还用于:
若所述第二候选中继集合中的候选中继个数为零,则确定所述第一候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继。
可选地,所述的装置,其中,中继选择模块1010根据预设选择条件确定所选择或重选的目标中继,包括:
在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区。
可选地,所述的装置,其中,中继选择模块1010还用于:
若所述终端当前信道质量低于第二门限,则确定第三候选中继集合,并从所述第三候选中继集合中选择一个候选中继作为目标中继;其中,所述第三候选中继集合包括从所述终端当前信道质量低于第一门限到所述终端当前信道质量低于第二门限期间发现的所有中继。
其中,所述第二门限小于所述第一门限。
可选地,所述的装置,其中,中继选择模块1010还用于:
若所述第三候选中继集合中的候选中继个数为1,则直接选择所述第三候选中继集合中的候选中继作为所述目标中继;
若所述第三候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
确定所述第三候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
从所述第三候选中继集合中随机选择一个候选中继作为所述目标中继;
从所述第三候选中继集合中选择最后发现的候选中继作为所述目标中继。
可选地,所述的装置,其中,所述第一门限和所述第二门限分别有网络配置或预配置确定。
可选地,所述的装置,其中,所述终端和网络设备通过直接Uu接口连接,所述终端当前信道质量为所述终端与网络设备之间Uu接口的信道质量;或者
所述终端通过中继和网络设备连接,所述终端当前信道质量包括终端与中继之间直接通信接口的信道质量、中继与网络设备之间Uu接口的信道质量中的至少之一。
可选地,所述的装置,其中,所述候选中继的信道质量包括终端与候选中继之间直接通信接口的信道质量、候选中继与网络设备之间Uu接口的信道质量中的至少之一。
在此需要说明的是,本公开实施例提供的上述装置,能够实现上述方法实施例所实现的所有方法步骤,且能够达到相同的技术效果,在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
需要说明的是,本申请实施例中对单元的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个处理器可读取存储介质中。基于这样的理解,本 申请的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本公开实施例还提供一种处理器可读存储介质,其中,所述处理器可读存储介质存储有计算机程序,所述计算机程序用于使所述处理器执行如上任一项所述的中继选择和重选的方法。
所述处理器可读存储介质可以是处理器能够存取的任何可用介质或数据存储设备,包括但不限于磁性存储器(例如软盘、硬盘、磁带、磁光盘(MO)等)、光学存储器(例如CD、DVD、BD、HVD等)、以及半导体存储器(例如ROM、EPROM、EEPROM、非易失性存储器(NAND FLASH)、固态硬盘(SSD))等。
本领域内的技术人员应明白,本申请的实施例可提供为方法、系统、或计算机程序产品。因此,本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
需要说明的是,应理解以上各个模块的划分仅仅是一种逻辑功能的划分,实际实现时可以全部或部分集成到一个物理实体上,也可以物理上分开。且这些模块可以全部以软件通过处理元件调用的形式实现;也可以全部以硬件的形式实现;还可以部分模块通过处理元件调用软件的形式实现,部分模块通过硬件的形式实现。例如,确定模块可以为单独设立的处理元件,也可以集成在上述装置的某一个芯片中实现,此外,也可以以程序代码的形式存储于上述装置的存储器中,由上述装置的某一个处理元件调用并执行以上确定模块的功能。其它模块的实现与之类似。此外这些模块全部或部分可以集成在一起,也可以独立实现。这里所述的处理元件可以是一种集成电路,具有 信号的处理能力。在实现过程中,上述方法的各步骤或以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如,各个模块、单元、子单元或子模块可以是被配置成实施以上方法的一个或多个集成电路,例如:一个或多个特定集成电路(Application Specific Integrated Circuit,ASIC),或,一个或多个微处理器(digital signal processor,DSP),或,一个或者多个现场可编程门阵列(Field Programmable Gate Array,FPGA)等。再如,当以上某个模块通过处理元件调度程序代码的形式实现时,该处理元件可以是通用处理器,例如中央处理器(Central Processing Unit,CPU)或其它可以调用程序代码的处理器。再如,这些模块可以集成在一起,以片上系统(system-on-a-chip,SOC)的形式实现。
本公开的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本公开的实施例,例如除了在这里图示或描述的那些以外的顺序实施。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外,说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一,例如A和/或B和/或C,表示包含单独A,单独B,单独C,以及A和B都存在,B和C都存在,A和C都存在,以及A、B和C都存在的7种情况。类似地,本说明书以及权利要求中使用“A和B中的至少一个”应理解为“单独A,单独B,或A和B都存在”。
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (25)

  1. 一种中继选择和重选的方法,应用于终端,所述方法包括:
    在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
    其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
  2. 根据权利要求1所述的方法,还包括:
    根据所接收的中继发现相关消息中所携带的标识信息,确定发送所述中继发现相关消息的中继是否归属于所述终端当前服务小区。
  3. 根据权利要求2所述的方法,其中,所述中继发现相关消息为直接通信接口发现消息或者直接通信接口通信消息。
  4. 根据权利要求2所述的方法,其中,所述标识信息包括以下信息中的一个或者多个:
    公共陆地移动网络PLMN标识;
    小区标识。
  5. 根据权利要求2所述的方法,其中,所述标识信息通过如下任一方式携带:
    直接通信接口PC5-S消息;
    直接通信接口PC5-无线资源控制RRC消息;
    直接通信接口分组数据汇聚协议PDCP层协议数据单元PDU头;
    直接通信接口无线链路控制RLC层协议数据单元PDU头;
    媒体接入控制MAC层协议数据单元PDU头;
    物理层直通链路控制信息SCI中。
  6. 根据权利要求1所述的方法,其中,在确定所选择或重选的目标中继之后,所述方法还包括:
    通过所选择或者重选的目标中继向网络指示切换完成指示消息;
    其中,在所述目标中继归属于所述终端当前服务小区时,所述切换完成指示消息中需要携带终端当前服务小区为终端分配的小区无线网络临时标识 C-RNTI。
  7. 根据权利要求1所述的方法,其中,根据预设选择条件确定所选择或重选的目标中继,包括:
    接收至少一个候选中继发送的中继发现相关消息;
    确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
    从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
    从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
  8. 根据权利要求1所述的方法,其中,根据预设选择条件确定所选择或重选的目标中继,包括:
    接收至少一个候选中继发送的中继发现相关消息;
    从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第一候选中继集合;
    确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合;
    从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
  9. 根据权利要求7或8所述的方法,其中,从所述第二候选中继集合中选择一个候选中继作为所述目标中继,包括:
    若所述第二候选中继集合中的候选中继个数为1,则直接选择所述第二候选中继集合中的候选中继作为所述目标中继;
    若所述第二候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
    确定所述第二候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
    从所述第二候选中继集合中随机选择一个候选中继作为所述目标中继。
  10. 根据权利要求7或8所述的方法,还包括:
    若所述第二候选中继集合中的候选中继个数为零,则确定所述第一候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所 述目标中继。
  11. 根据权利要求1所述的方法,其中,根据预设选择条件确定所选择或重选的目标中继,包括:
    在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
    若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
    若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区。
  12. 根据权利要求11所述的方法,还包括:
    若所述终端当前信道质量低于第二门限,则确定第三候选中继集合,并从所述第三候选中继集合中选择一个候选中继作为目标中继;其中,所述第三候选中继集合包括从所述终端当前信道质量低于第一门限到所述终端当前信道质量低于第二门限期间发现的所有中继;
    其中,所述第二门限小于所述第一门限。
  13. 根据权利要求12所述的方法,还包括:
    若所述第三候选中继集合中的候选中继个数为1,则直接选择所述第三候选中继集合中的候选中继作为所述目标中继;
    若所述第三候选中继集合中的候选中继个数大于1,则进一步根据如下原则之一确定所述目标中继:
    确定所述第三候选中继集合中每个候选中继的信道质量,选择信道质量最好的候选中继作为所述目标中继;
    从所述第三候选中继集合中随机选择一个候选中继作为所述目标中继;
    从所述第三候选中继集合中选择最后发现的候选中继作为所述目标中继。
  14. 根据权利要求12所述的方法,其中,所述第一门限和所述第二门限分别由网络配置或预配置确定。
  15. 根据权利要求11或12所述的方法,其中,所述终端和网络设备通过 直接Uu接口连接,所述终端当前信道质量为所述终端与网络设备之间Uu接口的信道质量;或者
    所述终端通过中继和网络设备连接,所述终端当前信道质量包括终端与中继之间直接通信接口的信道质量、中继与网络设备之间Uu接口的信道质量中的至少之一。
  16. 根据权利要求7-10和13中任一项所述的方法,其中,所述候选中继的信道质量包括终端与候选中继之间直接通信接口的信道质量、候选中继与网络设备之间Uu接口的信道质量中的至少之一。
  17. 一种终端,包括:收发机、存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序指令;所述收发机在处理器的控制下接收和发送数据,所述处理器用于读取存储器中的程序指令,执行下列操作:
    在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
    其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
  18. 根据权利要求17所述的终端,其中,所述处理器根据预设选择条件确定所选择或重选的目标中继,包括:
    接收至少一个候选中继发送的中继发现相关消息;
    确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
    从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
    从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
  19. 根据权利要求17所述的终端,其中,所述处理器根据预设选择条件确定所选择或重选的目标中继,包括:
    接收至少一个候选中继发送的中继发现相关消息;
    从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第一候选中继集合;
    确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量 满足信道质量门限的所有候选中继作为第二候选中继集合;
    从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
  20. 根据权利要求17所述的终端,其中,所述处理器根据预设选择条件确定所选择或重选的目标中继,包括:
    在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
    若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
    若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区。
  21. 一种中继选择和重选的装置,应用于终端,所述装置包括:
    中继选择模块,用于在中继选择或重选的过程中,根据预设选择条件确定所选择或重选的目标中继;
    其中,所述预设选择条件为优先选择归属于所述终端当前服务小区的中继作为所述目标中继。
  22. 根据权利要求21所述的中继选择和重选的装置,其中,所述中继选择模块根据预设选择条件确定所选择或重选的目标中继,包括:
    接收至少一个候选中继发送的中继发现相关消息;
    确定所述候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第一候选中继集合;
    从所述第一候选中继集合中选择归属于所述终端当前服务小区的候选中继作为第二候选中继集合;
    从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
  23. 根据权利要求21所述的中继选择和重选的装置,其中,所述中继选择模块根据预设选择条件确定所选择或重选的目标中继,包括:
    接收至少一个候选中继发送的中继发现相关消息;
    从所述候选中继中选择归属于所述终端当前服务小区的候选中继作为第 一候选中继集合;
    确定所述第一中继集合中每个候选中继的信道质量,选择所述信道质量满足信道质量门限的所有候选中继作为第二候选中继集合;
    从所述第二候选中继集合中选择一个候选中继作为所述目标中继。
  24. 根据权利要求21所述的中继选择和重选的装置,其中,所述中继选择模块根据预设选择条件确定所选择或重选的目标中继,包括:
    在所述终端当前信道质量低于第一门限时,终端接收到一个中继发送的中继发现相关消息之后,根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区;
    若所述中继属于所述终端当前服务小区,则确定所述中继为所述目标中继;
    若所述中继不属于所述终端当前服务小区,则继续接收其他中继发送的中继发现相关消息,并根据所述中继发现相关消息判断所述中继是否归属于所述终端当前服务小区。
  25. 一种处理器可读存储介质,所述处理器可读存储介质存储有计算机程序,所述计算机程序用于使所述处理器执行权利要求1至16任一项所述的中继选择和重选的方法。
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