WO2021042758A1 - 用于边路通信的小区重选方法、装置和系统 - Google Patents

用于边路通信的小区重选方法、装置和系统 Download PDF

Info

Publication number
WO2021042758A1
WO2021042758A1 PCT/CN2020/089334 CN2020089334W WO2021042758A1 WO 2021042758 A1 WO2021042758 A1 WO 2021042758A1 CN 2020089334 W CN2020089334 W CN 2020089334W WO 2021042758 A1 WO2021042758 A1 WO 2021042758A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell reselection
information
communication
side road
cell
Prior art date
Application number
PCT/CN2020/089334
Other languages
English (en)
French (fr)
Inventor
许辉
孟金莉
卢忱
赵祥模
惠飞
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP20859705.4A priority Critical patent/EP4027698A4/en
Priority to US17/640,770 priority patent/US20220312291A1/en
Publication of WO2021042758A1 publication Critical patent/WO2021042758A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • This application relates to a wireless communication network, for example, to a cell reselection method, device, and system for sideway communication.
  • D2D communication method is provided, that is, the user equipment (User Equipment, UE) can communicate with each other. Directly establish a communication connection for communication without going through a base station or other access node.
  • D2D communication includes, for example, various forms such as vehicle to other device (Vehicle to X, V2X).
  • radio resource control Radio Resource Control, RRC
  • the idle state and inactive state are similar
  • the difference is that in the inactive state, the UE context is reserved in the UE, the base station, and the core network, and the Non-Access Stratun (NAS) connection and the NG interface connection are reserved.
  • the UE in the inactive state enters the connected state through the RRC connection recovery process.
  • RRC Radio Resource Control
  • the UE may be in a state of high-speed movement, then the UE will reselect or switch between cells, and the UE needs to ensure the continuity of the service through the mobility management mechanism during the cell reselection or handover. .
  • the mobility management mechanism for how to ensure service continuity during cell reselection or handover for a UE in an inactive state, which may have an impact on the service continuity of the UE.
  • the present application provides a cell reselection method, device, and system for side road communication, which can ensure the service continuity of UE in side road communication.
  • the embodiment of the present application provides a cell reselection method for side road communication, including:
  • the UE in the inactive state participating in side road communication receives cell reselection information, and the cell reselection information includes: cell reselection information used to realize the continuity of side road communication services;
  • the UE performs cell reselection according to the cell reselection information and the capability information of the UE.
  • the embodiment of the present application provides a cell reselection method for side road communication, including:
  • the base station providing side road communication configures cell reselection information, and the cell reselection information includes: cell reselection information used to realize the continuity of side road communication services;
  • the base station sends cell reselection information.
  • An embodiment of the present application provides a cell reselection device for side road communication, which is set in a UE in an inactive state that participates in side road communication, and includes:
  • the receiving module is configured to receive cell reselection information, and the cell reselection information includes: cell reselection information for realizing the continuity of side road communication services;
  • the reselection module is configured to perform cell reselection according to cell reselection information and UE capability information.
  • the embodiment of the present application provides a cell reselection device for side road communication, which is set in a base station that provides side road communication, and includes:
  • the configuration module is configured to configure cell reselection information, and the cell reselection information includes: cell reselection information for realizing the continuity of side road communication services;
  • the sending module is set to send cell reselection information.
  • the embodiment of the present application provides a cell reselection system for side road communication, including: a UE and a base station, the UE is in an inactive state, and the base station provides side road communication;
  • the UE includes the cell reselection device used for side road communication as described above;
  • the base station includes the cell reselection device for side road communication as described above.
  • Figure 1 is a schematic diagram of the system architecture for sending V2X services through the PC5 interface
  • Figure 2 is a schematic diagram of UE transitions in different states
  • FIG. 3 is a flowchart of a cell reselection method for side road communication according to an embodiment
  • FIG. 4 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 5 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 6 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 7 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 8 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 9 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 10 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 11 is a flowchart of another cell reselection method for side road communication according to an embodiment
  • FIG. 12 is a schematic structural diagram of a cell reselection device for side road communication according to an embodiment
  • FIG. 13 is a schematic structural diagram of another cell reselection device for side road communication according to an embodiment
  • FIG. 14 is a schematic structural diagram of a cell reselection system for side road communication according to an embodiment
  • FIG. 15 is a schematic structural diagram of a UE provided by an embodiment
  • FIG. 16 is a schematic structural diagram of a base station provided by an embodiment.
  • D2D communication is a communication method for direct communication between UEs, including various forms such as V2X communication.
  • V2X communication takes V2X communication as an example. Choose the method to explain.
  • V2X may be implemented through a PC5 interface or a Uu interface, where the PC5 interface refers to the air interface of D2D, and the Uu interface refers to the air interface of the UE to the base station (gNB).
  • Figure 1 is a schematic diagram of the system architecture for sending V2X services through the PC5 interface.
  • a 5G core network (5G Core, 5GC) includes multiple network elements, and each UE accesses the network through an NG-Radio Access Network (NG-RAN).
  • NG-RAN NG-Radio Access Network
  • NR V2X supports unicast, groupcast, and broadcast transmissions. All three transmissions can be implemented in coverage, partial coverage, or out of coverage.
  • NR V2X transmission includes mode 1 (mode1) and mode 2 (mode2), where mode1 refers to the PC5 resources configured by the gNB to transmit V2X services, and mode2 refers to the PC5 resources that the UE independently selects to transmit V2X services.
  • FIG. 2 is a schematic diagram of UE transitions in different states. Among them, the Evolved-UMTS Terrestrial Radio Access (E-UTRA) network and the RRC state in the NR network are divided into RRC connected state (RRC_CONNECTED), RRC inactive state (RRC_INACTIVE) and RRC idle state ( RRC_IDLE).
  • E-UTRA Evolved-UMTS Terrestrial Radio Access
  • RNA RAN-based Notification Area
  • TA tracking Area
  • system message valid area is defined in the NR, which may include one or more cells.
  • the UE may be in a state of high-speed movement, then the UE will reselect or switch between cells, and the UE needs to ensure the continuity of the service through the mobility management mechanism during the cell reselection or handover. Sex. However, there is no corresponding mobility management mechanism for how to ensure service continuity during cell reselection or handover for a UE in an inactive state, which may have an impact on the service continuity of the UE.
  • Fig. 3 is a flowchart of a cell reselection method for side road communication according to an embodiment. As shown in Fig. 3, the method provided in this embodiment includes the following steps.
  • Step S3010 the UE in the inactive state participating in the side road communication receives the cell reselection information, and the cell reselection information includes: cell reselection information for realizing the continuity of the side road communication service.
  • the cell reselection method for side road communication is applied to a UE in a wireless communication system.
  • the UE is an inactive UE that participates in side road communication.
  • the inactive state is a state of the UE.
  • the inactive UE has been registered in the cell, but only a part of the connection information is saved in order to save power when the communication data is not transmitted. It needs to enter the connection through the RRC connection recovery process
  • the communication data transmission can only be continued after the state.
  • the communication between UEs is called sidelink communication and uses dedicated resources allocated for sidelink communication.
  • the UE in the inactive state may be a UE that is performing sideway communication, or it may be a UE that is about to perform sideway communication.
  • Both types of UEs are referred to as inactive UEs participating in sideway communication.
  • cell reselection may be required during movement or due to poor signal quality of the source cell, that is, reselection to a cell that can continue sideway communication.
  • the base station needs to configure the side road communication with cell reselection information for realizing the side road communication service continuity.
  • the base station can send cell reselection information through system information or dedicated RRC signaling.
  • the cell reselection information is a kind of broadcast information. UEs located within the cell coverage provided by the base station can receive the cell reselection information.
  • the UE in this application includes one of the following: On-board Unit (OBU) or any other UE.
  • OBU On-board Unit
  • Step S3020 The UE performs cell reselection according to the cell reselection information and the capability information of the UE.
  • the cell reselection information includes cell reselection information for realizing the continuity of side road communication services, after the UE reselects to the cell for side road communication according to the cell reselection information, the service continuity of side road communication can be ensured.
  • the UE also needs to participate in the cell reselection according to the UE's capability information for cell reselection, that is, the inactive UE participating in sideway communication performs the cell reselection together according to the cell reselection information and the UE's capability information.
  • the capability information of the UE includes the capability of the UE to perform sideway communication on the same radio access technology (Radio Access Technology, RAT) and/or different RATs, and the type of RAT that the UE is allowed to perform sideway communication. Since many UEs in D2D communication are not UEs with full capabilities, but due to factors such as cost, some UEs have only partial capabilities, for example, only support sideway communication in some RAT-type cells.
  • Radio Access Technology Radio Access Technology
  • the UE when it performs cell reselection, first it can only reselect to the cell of the RAT type that supports or allows side-way communication, and then the ability of the UE to perform side-way communication in the supported RAT cell is also different, and the UE can give priority to reselection. Select the RAT cell with better side communication capabilities.
  • the cell reselection information includes cell reselection frequency priority and side communication configuration information.
  • the information for the UE to determine the cell reselection may be based on the cell reselection frequency priority and side communication configuration information. Different cells are distinguished according to frequency, and the frequencies used by each cell may be the same or different.
  • the frequency priority of cell reselection configured by the base station indicates the priority of the frequency of the cell capable of sideway communication.
  • the frequency priority of cell reselection includes two scenarios, namely, in-coverage and out-of-coverage scenarios.
  • the UE in an in-coverage scenario, if the first frequency of the source cell of the unconnected UE is a frequency that provides sideway communication, the UE will use the first frequency as the highest priority for cell reselection.
  • the UE In an out-of-coverage scenario, if the UE is outside the coverage of a cell that provides side-way communication, the UE takes the second frequency as the highest priority for cell reselection, and the second frequency is the frequency of the cell that provides side-way communication resources.
  • the side road communication configuration information includes side road resource configuration information used for side road communication, that is, configuration information of resources that can be provided for side road communication, including configuration information of any resource such as frequency and symbol.
  • the UE performs cell reselection according to the cell reselection information and the UE's capability information, including: the UE preferentially selects a target cell that can provide side-way communication for cell reselection, and the target cell provides the source cell with the same frequency as the source cell. Side road communication with a different frequency from the source cell.
  • the UE performs cell reselection based on the cell reselection information and the UE's capability information, the cell selected based on the cell reselection information may not be able to provide sideway communication due to poor signal quality or excessive load. Then the UE will preferentially select a target cell that can provide sideway communication for cell reselection.
  • the cell reselection information used to achieve the continuity of side road communication services includes: when a UE that is interested in or is in side road communication needs to perform cell reselection, preferentially select a target that can provide side road communication Information about cell reselection by the cell. That is, in order to ensure the continuity of the UE side communication service, the UE expects to preferentially reselect to a target cell that can ensure the continuity of the UE side communication service.
  • the pre-configured side-way communication resource is used for side-way communication. That is, after the UE performs cell reselection, if the UE does not support side communication in the reselected cell, or the reselected cell cannot perform side communication due to poor signal quality or excessive load, etc.
  • the UE may use pre-configured side road communication resources for side road communication. Dedicated side road communication resources can be pre-configured for side road communication. The UE can use the pre-configured side road communication resources for side road communication to ensure that the UE can perform side road communication after reselection to ensure the continuity of side road communication services. .
  • the base station may also configure a special resource pool for side communication and broadcast special resource pool configuration information for cell reselection.
  • the UE After the UE receives the special resource pool configuration information for cell reselection, the UE performs cell reselection according to the cell reselection information and the UE's capability information, and selects the transmission resources for side road communication according to the special resource pool configuration information.
  • Configuring a special resource pool for cell reselection can ensure that the side road communication after the cell reselection can have available side road communication resources, which can further ensure the continuity of side road communication services.
  • the base station may also configure speed-related configuration information used for cell reselection for side communication.
  • the corresponding speed-related configuration information is determined according to the current movement speed, and the cell reselection is performed according to the cell reselection information indicated by the corresponding speed-related configuration information.
  • the speed of the UE is too high, the UE will frequently cross multiple cells during the movement. If the UE performs cell reselection every time the UE crosses a cell and changes the communication resources used for side communication, the UE may be The continuity of side road communications has an impact. Therefore, the speed-related configuration information used for cell reselection can be configured.
  • the speed-related configuration information includes, for example, the range of RNA, the range of effective area of system messages, or other cell reselection information.
  • Multiple thresholds can be set for the speed of the UE. For example, when the speed of the UE exceeds a certain threshold, it is determined that the speed of the UE is high. Then the range of the RNA or the effective area of the system message can be increased or speeded up.
  • the cell reselection process improves the continuity of side road communication services when a high-speed moving UE performs cell reselection.
  • the speed of the UE When the speed of the UE is lower than a certain threshold, it can be determined that the speed of the UE is a low speed, then the range of RNA or the effective area of the system message can be reduced, or the cell reselection process can be slowed down to improve the UE.
  • the reliability of side road communication services during cell reselection reduces the consumption of system resources.
  • the UE in the inactive state participating in side road communication receives cell reselection information, and the cell reselection information includes: cell reselection used to realize the continuity of side road communication services. Then the UE performs cell reselection according to the cell reselection information and the UE’s capability information. Since the cell reselection information includes cell reselection information for realizing the continuity of side communication services, after the UE performs the cell reselection, It can ensure the continuity of side road communication services and improve the user experience.
  • Fig. 4 is a flowchart of another cell reselection method for side road communication provided by an embodiment. As shown in Fig. 4, the method provided in this embodiment includes the following steps.
  • Step S4010 the inactive UE participating in side road communication receives cell reselection information.
  • the cell reselection information includes: cell reselection information for realizing the continuity of side road communication services.
  • Step S4020 the UE receives the RNA and/or the effective area of the system message.
  • RNA there is a parameter RNA in sideway communication, and the inactive UE does not need to notify the network when moving within the range of RNA.
  • one RNA is greater than or equal to one cell.
  • the NR also defines the effective area of the system message.
  • the effective area of the system message includes one or more cells. When the UE moves in the same effective area of the system message, there is no need to initiate a cell reselection or handover process.
  • the UE may receive information about the effective area of RNA and/or system messages from the information broadcast by the base station.
  • Step S4030 The UE performs cell reselection according to the cell reselection information and the capability information of the UE.
  • Step S4040 After the UE enters the cell reselection, it uses the side communication resources of the source cell within the effective area of RNA and/or system messages.
  • the UE can use the original communication resources for communication in RNA or within the effective area of system messages, after the UE performs cell reselection, whether the UE reselects to a cell with the same frequency as the source cell or a different frequency, the UE can Continue to use the side communication resources of the source cell for side communication within the effective area of RNA and/or system messages. In this way, although the UE reselects to a new cell, it can still use the original side road communication resources for communication, which can further avoid the interruption of side road communication services.
  • Fig. 5 is a flowchart of another cell reselection method for side road communication according to an embodiment. As shown in Fig. 5, the method provided in this embodiment includes the following steps.
  • step S5010 the base station of the side road communication is provided with configuration cell reselection information, and the cell reselection information includes: cell reselection information used to realize the continuity of side road communication services.
  • the cell reselection method for side road communication is applied to a base station in a wireless communication system.
  • the base station is a base station that can provide a side road communication cell.
  • the cell reselection information configured by the base station includes: cell reselection information for realizing the continuity of side road communication services.
  • the cell reselection information is used by UEs in an inactive state participating in side communication to perform side communication cell reselection.
  • the inactive state is a state of the UE.
  • the inactive UE has been registered in the cell, but only a part of the connection information is saved in order to save power when the communication data is not transmitted.
  • the communication data transmission can only be continued after the state.
  • D2D communication the communication between UEs is called side-way communication and uses dedicated resources allocated for side-way communication.
  • the UE in the inactive state may be a UE that is performing sideway communication, or it may be a UE that is about to perform sideway communication. Both types of UEs are referred to as inactive UEs participating in sideway communication. No matter which kind of UE is in the inactive state, cell reselection may be required during movement or due to poor signal quality of the source cell, that is, reselection to a cell that can continue sideway communication.
  • the base station needs to configure the side road communication with cell reselection information for realizing the side road communication service continuity.
  • the base station in the embodiment of the present application includes: Road Side Unit (RSU).
  • the base station also includes one of the following: eNB, gNB.
  • Step S5020 the base station sends cell reselection information.
  • the base station can send cell reselection information through system information or dedicated RRC signaling.
  • the cell reselection information is a kind of broadcast information.
  • UEs located within the cell coverage provided by the base station can receive the cell reselection information. Since the cell reselection information includes cell reselection information for realizing the continuity of side road communication services, after the UE reselects to the cell for side road communication according to the cell reselection information, the service continuity of side road communication can be ensured.
  • the UE When the UE performs cell reselection, it also needs to participate in cell reselection according to the capability information of the UE, that is, the inactive UE participating in sideway communication performs cell reselection together according to the cell reselection information and the UE capability information.
  • the cell reselection information includes cell reselection frequency priority and side road communication configuration information. Different cells are distinguished according to frequency, and the frequencies used by each cell may be the same or different.
  • the frequency priority of cell reselection configured by the base station indicates the priority of the frequency of the cell capable of sideway communication.
  • the frequency priority of cell reselection includes two scenarios, namely, in-coverage and out-of-coverage scenarios. Wherein, in an in-coverage scenario, if the first frequency of the source cell of the unconnected UE is a frequency that provides sideway communication, the UE will use the first frequency as the highest priority for cell reselection.
  • the side road communication configuration information includes side road resource configuration information used for side road communication, that is, configuration information of resources that can be provided for side road communication, including configuration information of any resource such as frequency and symbol.
  • the cell reselection frequency priority includes the frequency priority that can provide side road communication
  • the side road communication configuration information includes side road resource configuration information used for side road communication.
  • the cell reselection information used to achieve the continuity of side road communication services includes: when a UE that is interested in or is in side road communication needs to perform cell reselection, preferentially select a target that can provide side road communication Information about cell reselection by the cell.
  • the base station can configure the UE to enable the UE to preferentially select the target that can provide side communication Information about cell reselection by the cell.
  • the base station configures cell reselection information
  • the cell reselection information includes: cell reselection information for realizing the continuity of side road communication services; sending cell reselection information, Since the cell reselection information includes cell reselection information for realizing the continuity of side road communication services, after the UE that receives the cell reselection information performs cell reselection, the continuity of side road communication services can be ensured, and the user’s experience can be improved. Use experience.
  • FIG. 6 is a flowchart of another cell reselection method for side road communication provided by an embodiment. As shown in FIG. 6, the method provided in this embodiment includes the following steps.
  • step S6010 the base station for side road communication is provided with configuration cell reselection information, and the cell reselection information includes: cell reselection information used to realize the continuity of side road communication services.
  • Step S6020 the base station sends cell reselection information.
  • Step S6030 the base station sends the effective area of RNA and/or system message.
  • RNA there is a parameter RNA in sideway communication, and the inactive UE does not need to notify the network when moving within the range of RNA.
  • one RNA is greater than or equal to one cell.
  • the NR also defines the effective area of the system message.
  • the effective area of the system message includes one or more cells. When the UE moves in the same effective area of the system message, there is no need to initiate a cell reselection or handover process.
  • the UE may receive information about the effective area of RNA and/or system messages from the information broadcast by the base station.
  • the UE can use the original communication resources for communication in RNA or within the effective area of system messages, after the UE performs cell reselection, whether the UE reselects to a cell with the same frequency as the source cell or a different frequency, the UE can Continue to use the side communication resources of the source cell for side communication within the effective area of RNA and/or system messages. In this way, although the UE reselects to a new cell, it can still use the original side road communication resources for communication, which can further avoid the interruption of side road communication services. Therefore, the base station can send the effective area of RNA and/or system messages.
  • the base station may also send special resource pool configuration information for cell reselection.
  • the UE After the UE receives the special resource pool configuration information for cell reselection, the UE performs cell reselection according to the cell reselection information and the UE's capability information, and selects the transmission resources for side road communication according to the special resource pool configuration information.
  • Configuring a special resource pool for cell reselection can ensure that the side road communication after the cell reselection can have available side road communication resources, which can further ensure the continuity of side road communication services.
  • the base station may also send speed-related configuration information for cell reselection, the speed-related configuration information indicates at least one cell reselection information, and the speed-related configuration information corresponds to the speed of the UE performing cell reselection.
  • the corresponding speed-related configuration information is determined according to the current movement speed, and the cell reselection is performed according to the cell reselection information indicated by the corresponding speed-related configuration information.
  • the speed of the UE is too high, the UE will frequently cross multiple cells during the movement.
  • the speed-related configuration information used for cell reselection can be configured.
  • different UE moving speeds correspond to different speed-related configuration information
  • the speed-related configuration information includes, for example, the range of RNA, the range of effective area of system messages, or other cell reselection information.
  • Multiple thresholds can be set for the speed of the UE. For example, when the speed of the UE exceeds a certain threshold, it is determined that the speed of the UE is high.
  • the range of the RNA or the effective area of the system message can be increased or speeded up.
  • the cell reselection process improves the continuity of side road communication services when a high-speed moving UE performs cell reselection.
  • the speed of the UE is lower than a certain threshold, it can be determined that the speed of the UE is a low speed, then the range of RNA or the effective area of the system message can be reduced, or the cell reselection process can be slowed down to improve the UE.
  • the reliability of side road communication services during cell reselection reduces the consumption of system resources.
  • Fig. 7 is a flowchart of another cell reselection method for side road communication according to an embodiment. As shown in Fig. 7, the method provided in this embodiment includes the following steps.
  • step S7010 the UE in the inactive state uses the frequency F1 to perform V2X side communication in the source cell.
  • the source cell of the UE is a 5G NR cell
  • the frequency F1 is the V2X communication frequency in 5G NR
  • the frequency F1 is the 5G NR uplink authorized spectrum, or a dedicated V2X spectrum, such as the spectrum in 5.9 GHz.
  • V2X side road communication is an autonomous resource selection, because the UE is in an inactive state, the UE adopts the autonomous resource selection method.
  • step S7020 the gNB configures cell reselection information of the V2X service.
  • the cell reselection information includes: same frequency/different frequency adjacent cell reselection configuration information, where same frequency/different frequency adjacent cell reselection configuration information includes: frequency priority, relative priority for reselecting to NR/E-UTRA frequency , Threshold, reselection timer, speed-related configuration information, etc.; among them, frequency priority refers to the absolute frequency priority used for cell reselection, and the UE should select the frequency cell with the highest priority; relative priority is used It indicates the frequency priority of cell reselection together with frequency priority.
  • the priority of reselecting to NR cell is: NR frequency priority + NR relative priority
  • the priority of reselecting to E-UTRA is: E- UTRA frequency priority + E-UTRA relative priority
  • threshold value is used to sort neighbor cells according to measurement results
  • reselection timer is used to indicate how long to initiate cell reselection
  • speed related Configuration is used to set the corresponding cell reselection parameters, such as the reselection timer, according to the moving speed of the UE.
  • the cell reselection configuration information is sent to the UE through system messages or dedicated RRC signaling, and parameters are updated according to the network status, UE status, etc.
  • Step S7030 The UE selects a target cell according to the configuration information.
  • the UE selects the target cell according to the configuration information.
  • the UE uses F1 as the highest priority frequency for cell reselection, that is, the UE prefers to select a cell with F1 frequency. If there are multiple F1 frequency cells that meet the cell reselection conditions, the UE Select the cell with the best channel conditions as the target cell, and when performing cell reselection, the UE should evaluate its current speed and perform cell reselection according to speed-related parameters. For example, when the UE is moving at high speed, the cell can be shortened. The reselected timer value.
  • step S7040 the UE reselects to the target cell to continue V2X communication.
  • the UE reselects to the target cell, and remains in the inactive state or turns to the idle state or the connected state in the target cell.
  • the specific RRC state is determined by the gNB of the target cell.
  • the UE reselects to the target cell, and can randomly select V2X sending resources from the special resource pool broadcast by the target cell for V2X communication. 1) If the autonomous resource selection method is adopted in the target cell, when the UE is in the target cell After the cell completes resource perception and selection, the target cell uses the resources obtained by independent selection for V2X communication.
  • the target cell will be reselected After that, the UE continues to use the original side resources for V2X communication until the UE completes resource sensing and selection in the target cell, and then uses the sensed resources for V2X communication in the target cell; or, the UE first uses the original side resources for V2X communication After the target cell completes synchronization and V2X related system information acquisition, the resources of the special resource pool in the system message are randomly selected for V2X communication.
  • the target cell uses sensing The obtained resources perform V2X communication; or, after the UE completes synchronization in the target cell and obtains V2X-related system messages, it randomly selects the resources of the special resource pool in the system message for V2X communication, and then when the UE completes resource perception and selection in the target cell Then, use the sensed resources for V2X communication in the target cell; 2) If the resource scheduling method is used in the target cell, the UE randomly selects the resources of the special resource pool in the system message for V2X communication until the RRC connection is established in the target cell and After obtaining side scheduling resources through gNB, the scheduling resources are used for V2X communication.
  • the target cell and the source cell belong to the same effective area of system messages, after reselecting to the target cell, the UE continues to use the original side resources for V2X communication, and there is no need to perform new side resources in the target cell. Perception.
  • Fig. 8 is a flowchart of another cell reselection method for side road communication according to an embodiment. As shown in Fig. 8, the method provided in this embodiment includes the following steps.
  • step S8010 the UE in the inactive state performs side-road V2X communication outside the NR V2X frequency coverage.
  • the UE uses pre-configured V2X frequency resources to perform V2X communication outside the NR V2X frequency coverage. For example, the UE independently selects resources on the pre-configured F2 frequency resources to perform V2X communication.
  • NR out of V2X frequency coverage means that there is no NR frequency deployment for V2X services in the area where the UE is located.
  • Step S8020 The UE obtains cell reselection configuration information used for V2X communication.
  • the cell reselection configuration information can be pre-configured in the UE.
  • the cell reselection configuration information includes: same-frequency/different-frequency neighbor cell reselection configuration information, which includes at least frequency priority.
  • the UE takes the frequency that provides the V2X service as the highest priority for cell reselection.
  • the cell reselection configuration information also includes: relative priority for reselecting to the NR/E-UTRA frequency, threshold value, reselection timer, speed-related configuration information, etc.
  • Step S8030 the UE selects a target cell.
  • the UE selects the frequency that provides the V2X service as the highest priority. If there are multiple neighboring cells with the same priority, the neighboring cell with the best side PC5 link quality is selected as the target cell.
  • step S8040 the UE reselects to the target cell to continue V2X communication.
  • the UE is in an inactive or idle state in the target cell.
  • the UE continues to use pre-configured resources for V2X communication in the target cell until the UE completes resource sensing and selection in the target cell, and then uses sensing in the target cell.
  • the obtained resources are used for V2X communication; or, the UE first uses the original pre-configured side road resources for V2X communication, and then after the target cell completes synchronization and obtains V2X-related system messages, it randomly selects the resources of the special resource pool in the system message Perform V2X communication.
  • the UE uses the sensed resources to perform V2X communication in the target cell; or, after the UE completes synchronization in the target cell and obtains V2X-related system messages, it randomly selects system messages
  • the resources in the special resource pool are used for V2X communication, and then when the UE completes resource sensing and selection in the target cell, the sensed resources are used for V2X communication in the target cell.
  • FIG. 9 is a flowchart of another cell reselection method for side road communication provided by an embodiment. As shown in FIG. 9, the method provided in this embodiment includes the following steps.
  • Step S9010 the gNB configures cell reselection information and effective area information.
  • the effective area includes one of the following: RNA, the effective area of system messages.
  • the effective area information includes: a cell list, that is, the cells contained in the effective area.
  • the specific effective area information is broadcast through system messages.
  • the effective area configuration considers the speed factor and UE motion trajectory. For example, when the UE speed is high, the effective area contains more cells (RNA does not exceed the size of the tracking area TA), and the effective area is designed according to the UE’s motion trajectory, such as on a highway When driving, configure the cells along the highway as the effective area to reduce the frequency of effective area update.
  • Step S9020 the inactive UE performs V2X communication in the source cell.
  • the UE performs V2X communication in the source cell by autonomously selecting resources, and obtains configuration information for cell reselection through system broadcast messages.
  • Step S9030 the UE reselects to enter the target cell.
  • the UE determines the target cell according to the cell reselection information, such as selecting the frequency cell with the highest priority that provides V2X communication.
  • step S9040 the UE judges whether the target cell belongs to a new effective area, if yes, then go to step S9050, otherwise go to step S9060.
  • the UE judges whether it is a new effective area by comparing the effective area identifier in the system message of the target cell with the effective area identifier stored by itself: If the effective area identifier of the system message is different, and/or the RNA identifier is different, it means that it is new Effective area, otherwise it is the original effective area.
  • step S9050 the UE uses special resource pool resources to perform V2X communication.
  • the target cell is a new effective area.
  • the UE first randomly selects resources in the special resource pool for V2X communication in the target cell.
  • the special resource pool is indicated by the system message of the target cell until the UE completes the autonomous selection of the resource pool in the target cell. After sensing and resource selection, a new self-selected resource is then used for V2X communication. If the new effective area belongs to the new RNA area, the UE initiates the RNA location update process, and if the RNA periodic update timer expires, the UE also initiates the RNA update process.
  • Step S9060 the UE performs V2X communication in the target cell.
  • the UE randomly selects resources in the special resource pool of the target cell for V2X communication, until the target cell completes the sensing and selection of the autonomously selected resource pool, and then uses the independently selected resources for V2X communication.
  • Fig. 10 is a flowchart of another cell reselection method for side road communication provided by an embodiment. As shown in Fig. 10, the method provided in this embodiment includes the following steps.
  • step S10010 the UE performs side-road V2X communication in the NR cell.
  • NR cell refers to a cell that uses NR frequency and corresponding NR communication technology.
  • the UE is in an inactive state and uses autonomously selected resources for side-road V2X communication.
  • step S10020 the UE determines to select the E-UTRA target cell.
  • the NR target cell is not found. If there is no corresponding NR frequency (which can be used for V2X communication) for cell deployment, or the quality of the NR cell does not meet the V2X communication conditions, but there is an E-UTRA frequency cell, you can Provide V2X communication, and the communication quality also meets V2X requirements.
  • the UE performs cell reselection according to the cell reselection rule in the system message, and determines the E-UTRA target cell.
  • step S10030 the UE enters an idle state or a connected state in the target cell.
  • the UE can choose to enter the idle state or the connected state in the target cell, which is specifically determined according to the instructions of the network side base station.
  • Step S10040 the UE performs V2X communication in the target cell.
  • the UE randomly selects resources from the special resource pool in the target E-UTRA cell for V2X communication.
  • the special resource pool is indicated by the target cell system message. If the UE uses autonomously selected resources for V2X communication in the target cell, it will not be until the UE is in the target cell. Autonomous selection of resource pools After completing resource perception and selection, the UE uses the independently selected resources to continue V2X communication; or, if the UE uses scheduling resources in the target cell for V2X communication, it will not be until the UE establishes an RRC connection in the target cell and obtains side scheduling After the resources, the UE uses the scheduled resources to continue V2X communication.
  • FIG. 11 is a flowchart of another cell reselection method for side road communication according to an embodiment. As shown in FIG. 11, the method provided in this embodiment includes the following steps.
  • step S11010 the base station configures information related to the speed of the terminal.
  • the speed-related information includes one of the following: cell reselection information, system message effective area information, RNA information, etc.; among them, the cell reselection information considers the current movement speed of the UE. If it is high/medium speed, change the cell reselection Parameters speed up the process of cell reselection; the effective area of the system message can be adjusted for the current speed of the UE, such as for high-speed UE, can expand the effective area of the system message; RNA can also be adjusted according to the UE speed, if it is a high-speed UE, then Can expand the scope of RNA.
  • step S11020 the UE judges whether the current speed is normal, if yes, go to step S11030, otherwise go to step S11040.
  • the UE determines whether it is a normal speed by comparing the number of cell reselections initiated within a predetermined time with a pre-configured threshold. If it does not exceed the threshold, it is the normal speed, otherwise it is the medium/high speed.
  • step S11030 the UE uses common cell reselection parameters to perform cell reselection.
  • the UE is at a normal speed, adopts the corresponding cell reselection parameters for cell reselection, and maintains the original effective area of system messages and RNA configuration.
  • step S11040 the UE judges whether the current speed is a high speed, if yes, go to step S11050, otherwise, go to step S11060.
  • the UE's speed index exceeds the threshold value 1, it is high-speed driving. If the UE's speed index is lower than the threshold value 1, but higher than the threshold value 2, it is a medium speed; where the threshold value 1 and the threshold value The value 2 is respectively pre-configured by the gNB and notified to the UE through a system message.
  • step S11050 the UE uses high-speed corresponding cell reselection parameters to perform cell reselection.
  • the cell reselection parameters corresponding to high speed generally have a shorter cell reselection timer. In order to prevent the ping-pong reselection effect, the corresponding hysteresis value is also reduced.
  • the effective area of system messages and RNA can be expanded to include more cells.
  • step S11060 the UE uses the cell reselection parameters corresponding to the medium speed to perform cell reselection.
  • the V2X service is taken as an example for description.
  • the cell reselection method for side road communication provided by this application can also be applied to other types of broadcast services, such as digital video, and machine type communication (MTC). ), Public Safety (PS) communication, Mission Critical Push To Talk (MCPTT), etc.
  • MTC machine type communication
  • PS Public Safety
  • MCPTT Mission Critical Push To Talk
  • FIG. 12 is a schematic structural diagram of a cell reselection device for side road communication provided by an embodiment. As shown in FIG. 12, the cell reselection device for side road communication provided in this embodiment is set on a participating side road. In the UE in the inactive state in communication, the cell reselection device includes:
  • the receiving module 121 is configured to receive cell reselection information.
  • the cell reselection information includes: cell reselection information for realizing the continuity of side road communication services; the reselection module 122 is configured to receive cell reselection information and UE capability information Perform cell reselection.
  • the cell reselection device for side road communication provided in this embodiment is used to implement the cell reselection method for side road communication in the embodiment shown in FIG. 3, and the cell reselection method for side road communication provided in this embodiment is The implementation principle and technical effect of the device are similar, and will not be repeated here.
  • FIG. 13 is a schematic structural diagram of another cell reselection device for side road communication provided by an embodiment. As shown in FIG. 13, the cell reselection device for side road communication provided by this embodiment is set on the side In the base station of road communication, the cell reselection device includes:
  • the configuration module 131 is configured to configure cell reselection information.
  • the cell reselection information includes: cell reselection information for realizing the continuity of side road communication services; the sending module 132 is configured to send cell reselection information.
  • the cell reselection device for side road communication provided in this embodiment is used to implement the cell reselection method for side road communication in the embodiment shown in FIG. 5, and the cell reselection method for side road communication provided in this embodiment is The implementation principle and technical effect of the device are similar, and will not be repeated here.
  • Fig. 14 is a schematic structural diagram of a cell reselection system for side road communication provided by an embodiment.
  • the cell reselection system for side road communication provided by this embodiment includes: UE 141 and Base station 142.
  • the UE 141 includes a receiving module 1411, a processing module 1412, and a sending module 1413;
  • the base station 142 includes a receiving module 1421, a processing module 1422, and a sending module 1423.
  • the receiving module 1411 is used to receive the cell reselection configuration information and effective area information sent by the base station 142 through the air interface, and the V2X service data sent by the opposite terminal;
  • the processing module 1412 is used to determine the target reselection cell, and to select the side road The V2X communication resource of the PC5;
  • the sending module 1413 is used to send V2X data to the terminal of the V2X communication opposite end, and send a side road resource request message to the base station 142.
  • the receiving module 1421 is responsible for receiving the V2X side resource request message sent by the UE 141 at the Uu port; the processing module 1422 is responsible for scheduling V2X services, and is also responsible for setting cell reselection configuration information and effective area information; the sending module 1423 is responsible for sending cell reselection configuration information And the effective area information to the UE 141, and is also responsible for sending V2X side resource configuration information and special resource pool configuration information to the UE 142.
  • the receiving module 1411 in the UE 141 is used to implement the function of the receiving module 121
  • the processing module 1422 is used to implement the function of the reselection module 122
  • the processing module 1422 in the base station 142 is used to implement the function of the configuration module 131
  • the sending module 1423 is used To realize the function of the sending module 132.
  • FIG. 15 is a schematic structural diagram of a UE provided by an embodiment.
  • the UE includes a processor 151, a memory 152, a transmitter 153, and a receiver 154; the number of processors 151 in the UE may be one or There are multiple, one processor 151 is taken as an example in FIG. 15; the processor 151 and the memory 152, the transmitter 153 and the receiver 154 in the UE may be connected by a bus or other means. In FIG. 15, the connection by a bus is taken as an example.
  • the memory 152 can be configured to store software programs, computer-executable programs, and modules, such as the program corresponding to the cell reselection method for sideway communication in the embodiment of FIG. 3 or FIG. 4 of this application.
  • Instructions/modules for example, the receiving module 121 and the reselecting module 122 in the cell reselection device for side road communication).
  • the processor 151 implements at least one functional application and data processing of the UE by running software programs, instructions, and modules stored in the memory 152, that is, implements the aforementioned cell reselection method for sideway communication.
  • the memory 152 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal, and the like.
  • the memory 152 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the transmitter 153 is a module or a combination of devices capable of transmitting radio frequency signals into space, for example, a combination of radio frequency transmitters, antennas, and other devices.
  • the receiver 154 is a module or a combination of devices capable of receiving radio frequency signals from space, for example, a combination of radio frequency receivers, antennas, and other devices.
  • FIG. 16 is a schematic structural diagram of a base station provided by an embodiment.
  • the base station includes a processor 161, a memory 162, a transmitter 163, and a receiver 164; the number of processors 161 in the base station may be one or There are multiple.
  • One processor 161 is taken as an example in FIG. 16; the processor 161 and the memory 162, the transmitter 163 and the receiver 164 in the base station may be connected by a bus or other methods. In FIG. 16, the connection by a bus is taken as an example.
  • the memory 162 can be configured to store software programs, computer-executable programs, and modules, such as the program corresponding to the cell reselection method for sideway communication in the embodiment of FIG. 5 or FIG. 6 of this application. Instructions/modules (for example, the configuration module 131 and the sending module 132 in the cell reselection device for side road communication).
  • the processor 161 implements at least one functional application and data processing of the base station by running the software programs, instructions, and modules stored in the memory 162, that is, implements the aforementioned cell reselection method for sideway communication.
  • the memory 162 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal, and the like.
  • the memory 162 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the transmitter 163 is a module or a combination of devices capable of transmitting radio frequency signals into space, for example, a combination of radio frequency transmitters, antennas, and other devices.
  • the receiver 164 is a module or a combination of devices capable of receiving radio frequency signals from space, for example, a combination of radio frequency receivers, antennas, and other devices.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are executed by a computer processor, they are used to execute a cell reselection method for sideway communication.
  • the method includes: The UE in the inactive state of the road communication receives the cell reselection information.
  • the cell reselection information includes: cell reselection information used to realize the continuity of side road communication services; the UE performs cell reselection according to the cell reselection information and UE capability information . .
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are executed by a computer processor, they are used to execute a cell reselection method for sideway communication.
  • the method includes: The base station of road communication configures cell reselection information, and the cell reselection information includes: cell reselection information used to realize the continuity of side road communication services; the base station sends cell reselection information.
  • user terminal encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser, or a vehicle-mounted mobile station.
  • the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.
  • Computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages Source code or object code.
  • ISA Instruction Set Architecture
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), optical Memory devices and systems (Digital Video Disc (DVD) or Compact Disc (CD)), etc.
  • Computer-readable media may include non-transitory storage media.
  • the data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
  • DSP Digital Signal Processing
  • ASICs application specific integrated circuits
  • FPGA Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请提出一种用于边路通信的小区重选方法、装置和系统，其中，用于边路通信的小区重选方法包括：参与边路通信的非激活态的UE接收小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；UE根据小区重选信息和UE的能力信息进行小区重选。

Description

用于边路通信的小区重选方法、装置和系统
本申请要求在2019年09月04日提交中国专利局、申请号为201910833916.8的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信网络，例如涉及一种用于边路通信的小区重选方法、装置和系统。
背景技术
在第五代移动通信(5th Generation，5G)新空口(New Radio，NR)中，提供了设备到设备(Device to Device，D2D)的通信方式，即用户设备(User Equipment，UE)之间可以直接建立通信连接进行通信，而无需通过基站或其他接入节点。D2D通信例如包括车辆到其他设备(Vehicle to X，V2X)等多种形式。
在5G NR中定义了UE的三种无线资源控制(Radio Resource Control，RRC)状态，包括空闲态(idle)、非激活态(inactive)和连接态(connected)，其中空闲态和非激活态类似，区别是在非激活态中在UE、基站和核心网中保留UE上下文，且保留非接入层(Non-Access Stratun，NAS)连接和NG接口连接。非激活态的UE通过RRC连接恢复过程进入连接态。
对于D2D通信，特别是V2X通信，UE可能处于高速移动的状态，那么UE将在小区间进行重选或切换，UE在小区重选或切换的过程中需要通过移动性管理机制保证业务的连续性。而处于非激活态的UE在小区重选或切换的过程中如何保证业务的连续性并没有相应的移动性管理机制，可能对UE的业务连续性产生影响。
发明内容
本申请提供一种用于边路通信的小区重选方法、装置和系统，能够保证UE进行边路通信的业务连续性。
本申请实施例提供一种用于边路通信的小区重选方法，包括：
参与边路通信的非激活态的UE接收小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
UE根据小区重选信息和UE的能力信息进行小区重选。
本申请实施例提供一种用于边路通信的小区重选方法，包括：
提供边路通信的基站配置小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
基站发送小区重选信息。
本申请实施例提供一种用于边路通信的小区重选装置，设置于参与边路通信的非激活态的UE中，包括：
接收模块，设置为接收小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
重选模块，设置为根据小区重选信息和UE的能力信息进行小区重选。
本申请实施例提供一种用于边路通信的小区重选装置，设置于提供边路通信的基站中，包括：
配置模块，设置为配置小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
发送模块，设置为发送小区重选信息。
本申请实施例提供一种用于边路通信的小区重选系统，包括：UE和基站，UE处于非激活态，基站提供边路通信；
UE包括如上所述的用于边路通信的小区重选装置；
基站包括如上所述的用于边路通信的小区重选装置。
附图说明
图1为通过PC5接口发送V2X业务的系统架构示意图；
图2为不同状态UE转换的示意图；
图3为一实施例提供的一种用于边路通信的小区重选方法的流程图；
图4为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图5为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图6为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图7为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图8为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图9为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图10为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图11为一实施例提供的另一种用于边路通信的小区重选方法的流程图；
图12为一实施例提供的一种用于边路通信的小区重选装置的结构示意图；
图13为一实施例提供的另一种用于边路通信的小区重选装置的结构示意图；
图14为一实施例提供的一种用于边路通信的小区重选系统的结构示意图；
图15为一实施例提供的一种UE的结构示意图；
图16为一实施例提供的一种基站的结构示意图。
具体实施方式
下文中将结合附图对本申请的实施例进行详细说明。
D2D通信是UE之间直接进行通信的一种通信方式，包括V2X通信等多种形式，本申请下述各实施例以V2X通信为例，对本申请实施例提供的用于路边通信的小区重选方法进行说明。
5G NR中的V2X技术包括：V2X可能通过PC5接口或Uu接口实现，其中PC5接口是指D2D的空中接口，Uu接口是指UE到基站(gNB)的空中接口。如图1所示，图1为通过PC5接口发送V2X业务的系统架构示意图。其中5G核心网(5G Core，5GC)中包括多个网元，各UE通过NG无线接入网(NG-Radio Access Network，NG-RAN)接入网络。
NR V2X支持单播(unicast)，组播(groupcast)和广播(broadcast)传输，所有三种传输都可在覆盖内，部分覆盖内，或覆盖外实现。NR V2X传输包括模式1(mode1)和模式2(mode2)，其中mode1是指gNB配置传输V2X业务的PC5资源，mode2是指UE自主选择传输V2X业务的PC5资源。
在5G NR中定义了UE的三种RRC状态：空闲态，非激活态，连接态。其中非激活态和空闲态类似，区别是在UE，gNB，5GC中保留UE上下文，保留NAS连接和NG接口连接，非激活态UE通过RRC连接恢复过程进入连接态。图2为不同状态UE转换的示意图。其中演进的UMTS陆地无线接入(Evolved-UMTS Terrestrial Radio Access，E-UTRA)网络和NR网络中的RRC状态均分为RRC连接态(RRC_CONNECTED)、RRC非激活态(RRC_INACTIVE)和RRC空闲态(RRC_IDLE)。各种状态之间可以相互转换。允许非激活态UE一定的范围内移动而不用通知网络，该移动范围定义为基 于RAN的通知区域(RAN-based Notification Area,RNA)，一般RNA大于或等于一个小区，而小于或等于一个跟踪区域(Tracking Area，TA)；另外在NR中定义了系统消息有效区域，该区域可包括一个或多个小区，当UE在同一系统消息有效区域中移动时，不需要发起小区重选或切换过程。
在D2D通信中，特别是V2X通信，UE可能处于高速移动的状态，那么UE将在小区间进行重选或切换，UE在小区重选或切换的过程中需要通过移动性管理机制保证业务的连续性。而处于非激活态的UE在小区重选或切换的过程中如何保证业务的连续性并没有相应的移动性管理机制，可能对UE的业务连续性产生影响。
图3为一实施例提供的一种用于边路通信的小区重选方法的流程图，如图3所示，本实施例提供的方法包括如下步骤。
步骤S3010，参与边路通信的非激活态的UE接收小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息。
本实施例提供的用于边路通信的小区重选方法应用于无线通信系统中的UE。且该UE为参与边路通信的非激活态的UE。非激活态为UE的一个状态，处于非激活态的UE已经在小区中进行了注册，但在不进行通信数据传输时，为了节电而仅保存一部分连接信息，需要通过RRC连接恢复过程进入连接态后才能继续进行通信数据传输。在D2D通信中，UE之间进行的通信被称为边路(sidelink)通信，使用为边路通信分配的专用资源。处于非激活态的UE可能是正在进行边路通信的UE，也可能是即将进行边路通信的UE，这两种UE都称为参与边路通信的非激活态的UE。无论哪种处于非激活态的UE，在移动过程中或者由于源小区的信号质量不佳都可能需要进行小区重选，也即重选到进行可继续进行边路通信的小区。为了保证参与边路通信的非激活态的UE的业务连续性，基站需要为边路通信配置用于实现边路通信业务连续性的小区重选信息。基站可以通过系统信息或专用RRC信令发送小区重选信息，小区重选信息是一种广播信息，位于基站提供的小区覆盖范围内的UE均能够接收到小区重选信息。
本申请中的UE包括以下之一：车载单元(On board Unit，OBU)或其他任一种UE。
步骤S3020，UE根据小区重选信息和UE的能力信息进行小区重选。
由于小区重选信息是包括用于实现边路通信业务连续性的小区重选信息，因此UE根据小区重选信息重选到进行边路通信的小区后，可以保证边路通信的业务连续性。UE进行小区重选还需要根据UE的能力信息参与小区重选，也即 参与边路通信的非激活态的UE根据小区重选信息和UE的能力信息共同进行小区重选。
其中，UE的能力信息包括UE在相同无线接入技术(Radio Access Technology，RAT)和/或不同RAT上进行边路通信的能力，以及UE被允许进行边路通信的RAT类型。由于D2D通信中的许多UE并不是具有全部能力的UE，而是出于成本等因素的考虑，某些UE仅具有部分的能力，例如仅在部分RAT类型的小区中支持边路通信。那么UE在进行小区重选时，首先仅能重选到支持的或者允许进行边路通信的RAT类型的小区，然后UE在支持的RAT小区进行边路通信的能力也是不同的，UE可以优先重选到边路通信能力较佳的RAT小区中。
小区重选信息包括小区重选频率优先级和边路通信配置信息，UE确定重选小区的信息可以是根据小区重选频率优先级和边路通信配置信息。其中不同小区根据频率进行区分，各小区采用的频率可以相同也可以不同，基站配置的小区重选频率优先级指示了能够进行边路通信的小区的频率的优先级别。小区重选频率优先级包括两种场景，分别为在覆盖内场景和覆盖外场景。其中，在覆盖内场景中，若非连接态的UE的源小区的第一频率为提供边路通信的频率，则UE将第一频率作为小区重选最高优先级。在覆盖外场景中，若UE在提供边路通信的小区覆盖范围外，则UE将第二频率作为小区重选最高优先级，第二频率为提供边路通信资源的小区的频率。边路通信配置信息包括用于边路通信的边路资源配置信息，也即能够提供给边路通信的资源的配置信息，包括频率、符号等任一种资源的配置信息。
在一实施例中，UE根据小区重选信息和UE的能力信息进行小区重选，包括：UE优先选择能够提供边路通信的目标小区进行小区重选，目标小区提供与源小区频率相同的或与源小区频率不同的边路通信。也就是说，虽然UE是根据小区重选信息和UE的能力信息进行小区重选，但根据小区重选信息所选出的小区可能由于信号质量不佳或者负载过大而无法提供边路通信，那么UE将优先选择能够提供边路通信的目标小区进行小区重选。
在一实施例中，用于实现边路通信业务连续性的小区重选信息，包括：当感兴趣或正在进行边路通信的UE需要进行小区重选时，优先选择能够提供边路通信的目标小区进行小区重选的信息。也就是为了保证UE边路通信业务的连续性，UE期望优先重选到能够保证UE边路通信业务的连续性的目标小区。
在一实施例中，若UE不支持在重选后的小区进行边路通信，则采用预配置的边路通信资源进行边路通信。也就是当UE进行了小区重选后，若UE不支持在重选后的小区进行边路通信，或者重选后的小区由于信号质量不佳或负载过 大等原因无法进行边路通信，那么UE可以采用预配置的边路通信资源进行边路通信。可以为边路通信预配置专用的边路通信资源，UE可以采用预配置的边路通信资源进行边路通信，确保UE可以在重选后进行边路通信，以确保边路通信业务的连续性。
在一实施例中，基站还可以为边路通信配置特殊资源池并广播用于小区重选的特殊资源池配置信息。当UE接收到用于小区重选的特殊资源池配置信息后，UE根据小区重选信息和UE的能力信息进行小区重选，并根据特殊资源池配置信息选择用于边路通信的传输资源。为小区重选配置特殊资源池，可以确保进行了小区重选后的边路通信能够具有可用的边路通信资源，可以进一步保证边路通信业务的连续性。
在一实施例中，基站还可以为边路通信配置用于小区重选的速度相关配置信息。当UE接收到用于小区重选的速度相关配置信息后根据当前运动速度确定对应的速度相关配置信息，根据对应的速度相关配置信息指示的小区重选信息进行小区重选。当UE的速度过高时，UE在移动过程中将频繁跨越多个小区，若在UE每次跨越小区时都进行小区重选，改变进行边路通信所使用的通信资源，则可能对UE进行的边路通信的连续性产生影响。因此可以配置用于小区重选的速度相关配置信息。在速度相关配置信息中，不同的UE移动速度对应不同的速度相关配置信息，速度相关配置信息例如包括RNA的范围、系统消息有效区域的范围、或者其他小区重选信息。可以为UE的速度设置多个门限值，例如当UE的速度超过某一门限值时确定UE的速度为高速，那么可以通过将RNA的范围或系统消息有效区域的范围增大，或者加快小区重选过程，提高在高速移动的UE进行小区重选时的边路通信业务连续性。而在UE的速度低于某一门限值时，可以确定UE的速度为低速度，那么可以通过将RNA的范围或系统消息有效区域的范围减小，或者减慢小区重选过程，提高UE进行小区重选时的边路通信业务可靠性，减少系统资源的消耗。
本实施例提供的用于边路通信的小区重选方法，参与边路通信的非激活态的UE接收小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息，然后UE根据小区重选信息和UE的能力信息进行小区重选，由于小区重选信息包括用于实现边路通信业务连续性的小区重选信息，那么UE进行了小区重选后，可以确保边路通信业务的连续性，提高用户的使用体验。
图4为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图4所示，本实施例提供的方法包括如下步骤。
步骤S4010，参与边路通信的非激活态的UE接收小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息。
步骤S4020，UE接收RNA和/或系统消息有效区域。
在边路通信中具有一个参数RNA，非激活态的UE在RNA的范围内移动不需要通知网络，一般一个RNA大于或等于一个小区。另外在NR中还定义了系统消息有效区域，系统消息有效区域包括一个或多个小区，当UE在同一系统消息有效区域中移动时，不需要发起小区重选或切换过程。UE可以从基站广播的信息中接收RNA和/或系统消息有效区域的信息。
步骤S4030，UE根据小区重选信息和UE的能力信息进行小区重选。
步骤S4040，UE进小区重选后，在RNA和/或系统消息有效区域内使用源小区的边路通信资源。
由于UE在RNA中或系统消息有效区域内都能够采用原有通信资源进行通信，因此在UE进行小区重选后，无论UE重选到与源小区频率相同还是频率不同的小区，UE都可以在RNA和/或系统消息有效区域内继续使用源小区的边路通信资源进行边路通信。这样虽然UE重选到了新的小区，但可以仍然使用原有边路通信资源进行通信，可以进一步避免边路通信业务中断。
图5为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图5所示，本实施例提供的方法包括如下步骤。
步骤S5010，提供边路通信的基站配置小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息。
本实施例提供的用于边路通信的小区重选方法应用于无线通信系统中的基站。且该基站为可提供边路通信小区的基站。基站配置小区重选信息包括：用于实现边路通信业务连续性的小区重选信息。其中小区重选信息是用于参与边路通信的非激活态的UE进行边路通信小区重选所使用的。非激活态为UE的一个状态，处于非激活态的UE已经在小区中进行了注册，但在不进行通信数据传输时，为了节电而仅保存一部分连接信息，需要通过RRC连接恢复过程进入连接态后才能继续进行通信数据传输。在D2D通信中，UE之间进行的通信被称为边路通信，使用为边路通信分配的专用资源。处于非激活态的UE可能是正在进行边路通信的UE，也可能是即将进行边路通信的UE，这两种UE都称为参与边路通信的非激活态的UE。无论哪种处于非激活态的UE，在移动过程中或者由于源小区的信号质量不佳都可能需要进行小区重选，也即重选到进行可继续进行边路通信的小区。为了保证参与边路通信的非激活态的UE的业务连续性，基站需要为边路通信配置用于实现边路通信业务连续性的小区重选信息。
本申请实施例中的基站包括：路边单元(Road Side Unit，RSU)。基站还包括以下之一：eNB,gNB。
步骤S5020，基站发送小区重选信息。
基站可以通过系统信息或专用RRC信令发送小区重选信息，小区重选信息是一种广播信息，位于基站提供的小区覆盖范围内的UE均能够接收到小区重选信息。由于小区重选信息是包括用于实现边路通信业务连续性的小区重选信息，因此UE根据小区重选信息重选到进行边路通信的小区后，可以保证边路通信的业务连续性。UE进行小区重选还需要根据UE的能力信息参与小区重选，也即参与边路通信的非激活态的UE根据小区重选信息和UE的能力信息共同进行小区重选。
小区重选信息包括小区重选频率优先级和边路通信配置信息。其中不同小区根据频率进行区分，各小区采用的频率可以相同也可以不同，基站配置的小区重选频率优先级指示了能够进行边路通信的小区的频率的优先级别。小区重选频率优先级包括两种场景，分别为在覆盖内场景和覆盖外场景。其中，在覆盖内场景中，若非连接态的UE的源小区的第一频率为提供边路通信的频率，则UE将第一频率作为小区重选最高优先级。在覆盖外场景中，若UE在提供边路通信的小区覆盖范围外，则UE将第二频率作为小区重选最高优先级，第二频率为提供边路通信资源的小区的频率。边路通信配置信息包括用于边路通信的边路资源配置信息，也即能够提供给边路通信的资源的配置信息，包括频率、符号等任一种资源的配置信息。
在一实施例中，小区重选频率优先级包括能提供边路通信的频率优先级，边路通信配置信息包括用于边路通信的边路资源配置信息。
在一实施例中，用于实现边路通信业务连续性的小区重选信息，包括：当感兴趣或正在进行边路通信的UE需要进行小区重选时，优先选择能够提供边路通信的目标小区进行小区重选的信息。也就是为了保证UE边路通信业务的连续性，UE期望优先重选到能够保证UE边路通信业务的连续性的目标小区，那么基站可以为UE配置使UE优先选择能够提供边路通信的目标小区进行小区重选的信息。
本实施例提供的用于边路通信的小区重选方法，基站配置小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；发送小区重选信息，由于小区重选信息包括用于实现边路通信业务连续性的小区重选信息，那么接收到小区重选信息的UE进行了小区重选后，可以确保边路通信业务的连续性，提高用户的使用体验。
图6为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图6所示，本实施例提供的方法包括如下步骤。
步骤S6010，提供边路通信的基站配置小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息。
步骤S6020，基站发送小区重选信息。
步骤S6030，基站发送RNA和/或系统消息有效区域。
在边路通信中具有一个参数RNA，非激活态的UE在RNA的范围内移动不需要通知网络，一般一个RNA大于或等于一个小区。另外在NR中还定义了系统消息有效区域，系统消息有效区域包括一个或多个小区，当UE在同一系统消息有效区域中移动时，不需要发起小区重选或切换过程。UE可以从基站广播的信息中接收RNA和/或系统消息有效区域的信息。由于UE在RNA中或系统消息有效区域内都能够采用原有通信资源进行通信，因此在UE进行小区重选后，无论UE重选到与源小区频率相同还是频率不同的小区，UE都可以在RNA和/或系统消息有效区域内继续使用源小区的边路通信资源进行边路通信。这样虽然UE重选到了新的小区，但可以仍然使用原有边路通信资源进行通信，可以进一步避免边路通信业务中断。因此基站可以发送RNA和/或系统消息有效区域。
在一实施例中，基站还可以发送用于小区重选的特殊资源池配置信息。当UE接收到用于小区重选的特殊资源池配置信息后，UE根据小区重选信息和UE的能力信息进行小区重选，并根据特殊资源池配置信息选择用于边路通信的传输资源。为小区重选配置特殊资源池，可以确保进行了小区重选后的边路通信能够具有可用的边路通信资源，可以进一步保证边路通信业务的连续性。
在一实施例中，基站还可以发送用于小区重选的速度相关配置信息，速度相关配置信息指示至少一个小区重选信息，速度相关配置信息与进行小区重选的UE的速度对应。当UE接收到用于小区重选的速度相关配置信息后根据当前运动速度确定对应的速度相关配置信息，根据对应的速度相关配置信息指示的小区重选信息进行小区重选。当UE的速度过高时，UE在移动过程中将频繁跨越多个小区，若在UE每次跨越小区时都进行小区重选，改变进行边路通信所使用的通信资源，则可能对UE进行的边路通信的连续性产生影响。因此可以配置用于小区重选的速度相关配置信息。在速度相关配置信息中，不同的UE移动速度对应不同的速度相关配置信息，速度相关配置信息例如包括RNA的范围、系统消息有效区域的范围、或者其他小区重选信息。可以为UE的速度设置多个门限值，例如当UE的速度超过某一门限值时确定UE的速度为高速，那么可以通过将RNA的范围或系统消息有效区域的范围增大，或者加快小区重选过程，提高在高速移动的UE进行小区重选时的边路通信业务连续性。而在UE的速度低于某一门限值时，可以确定UE的速度为低速度，那么可以通过将RNA的范围或系统消息有效区域的范围减小，或者减慢小区重选过程，提高UE进行小区重 选时的边路通信业务可靠性，减少系统资源的消耗。
下面以几个具体实施例对本申请实施例提供的用于边路通信的小区重选方法进行详细说明。且下述几个实施例均以V2X通信为例进行说明。
图7为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图7所示，本实施例提供的方法包括如下步骤。
步骤S7010，非激活态的UE在源小区采用频率F1进行V2X边路通信。
UE源小区为5G NR小区，频率F1为5G NR中V2X通信频率，频率F1为5G NR的上行授权频谱，或者V2X专用频谱，如5.9GHz中的频谱。V2X边路通信为自主选择资源，因为UE处于非激活态，则UE采用自主选择资源方式。
步骤S7020，gNB配置V2X业务的小区重选信息。
其中小区重选信息包括：同频/异频邻小区重选配置信息，其中同频/异频邻小区重选配置信息包括：频率优先级，重选到NR/E-UTRA频率的相对优先级，门限值，重选定时器，速度相关配置信息等；其中，频率优先级是指用于小区重选的绝对频率优先级，UE应当选择优先级最高的频率小区；相对优先级，用于和频率优先级一起指示小区重选的频率优先级，例如重选到NR小区的优先级为：NR频率优先级+NR的相对优先级，重选到E-UTRA的优先级为：E-UTRA频率优先级+E-UTRA的相对优先级；门限值用于根据测量结果对邻小区进行小区重选排序；重选定时器，用于指示多长时间内发起小区重选；速度相关配置，用于根据UE的移动速度设置相应的小区重选参数，如重选定时器等。
小区重选配置信息通过系统消息或专用RRC信令发送给UE，并根据网络状态，UE状态等进行参数更新。
步骤S7030，UE根据配置信息选择目标小区。
UE根据配置信息选择目标小区，一般来说，UE将F1作为最高优先级频率进行小区重选，即UE优先选择F1频率的小区，如果有多个F1频率的小区满足小区重选条件，则UE选择其中具有最好信道条件的小区作为目标小区，且在进行小区重选时，UE应当评估当前的自身速度，并根据速度相关参数进行小区重选，如UE在高速运动时，可以缩短进行小区重选的定时器数值。
步骤S7040，UE重选到目标小区继续进行V2X通信。
UE重选到目标小区，并在目标小区保持非激活态或转到空闲态或转到连接态，具体的RRC状态由目标小区的gNB确定。为了减少V2X通信的中断时间，UE重选到目标小区，可以在目标小区广播的特殊资源池中随机选择V2X发送资源进行V2X通信，1)如果在目标小区采用自主选择资源方式，当UE在目标 小区完成资源感知和选择后，在目标小区采用自主选择得到的资源进行V2X通信。如果UE进行小区重选的原因是Uu口链路质量下降，而边路PC5的质量可以满足继续V2X通信，尤其是PC5采用V2X专用频谱通信时更可能出现上述情况，则在重选到目标小区后，UE继续采用原有边路资源进行V2X通信，直到UE在目标小区完成资源感知和选择后，在目标小区采用感知得到的资源进行V2X通信；或者，UE首先采用原有边路资源进行V2X通信，然后在目标小区完成同步和V2X相关系统消息获取后，则随机选择系统消息中的特殊资源池的资源进行V2X通信，最后当UE在目标小区完成资源感知和选择后，在目标小区采用感知得到的资源进行V2X通信；再或者，UE在目标小区完成同步和V2X相关系统消息获取后，随机选择系统消息中的特殊资源池的资源进行V2X通信，然后当UE在目标小区完成资源感知和选择后，在目标小区采用感知得到的资源进行V2X通信；2)如果在目标小区采用调度资源方式，则UE随机选择系统消息中的特殊资源池的资源进行V2X通信，直到在目标小区建立RRC连接并通过gNB获取边路调度资源后，采用调度资源进行V2X通信。
需要指出的是，如果目标小区和源小区属于相同的系统消息有效区域，则在重选到目标小区后，UE继续采用原有边路资源进行V2X通信，不必在目标小区进行新的边路资源感知。
图8为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图8所示，本实施例提供的方法包括如下步骤。
步骤S8010，非激活态的UE在NR V2X频率覆盖外进行边路V2X通信。
UE在NR V2X频率覆盖外采用预配置的V2X频率资源进行V2X通信，例如UE在预配置的F2频率资源上自主选择资源进行V2X通信。NR V2X频率覆盖外是指：UE所在区域没有用于V2X业务的NR频率部署。
步骤S8020，UE获取用于V2X通信的小区重选配置信息。
考虑UE在覆盖外，则小区重选配置信息可以预配置在UE中。其中，小区重选配置信息包括：同频/异频邻小区重选配置信息，其中至少包括：频率优先级，如UE将提供V2X业务的频率作为最高优先级进行小区重选。进一步的，小区重选配置信息还包括：重选到NR/E-UTRA频率的相对优先级，门限值，重选定时器，速度相关配置信息等。
步骤S8030，UE选择目标小区。
UE将提供V2X业务的频率作为最高优先级进行选择，如果有多个邻小区具有相同的优先级，则选择边路PC5链路质量最好的邻小区作为目标小区。
步骤S8040，UE重选到目标小区继续进行V2X通信。
UE在目标小区处于非激活态或空闲态，为了保障V2X业务连续性，UE在目标小区继续使用预配置的资源进行V2X通信，直到UE在目标小区完成资源感知和选择后，在目标小区采用感知得到的资源进行V2X通信；或者，UE首先采用原有预配置的边路资源进行V2X通信，然后在目标小区完成同步和V2X相关系统消息获取后，则随机选择系统消息中的特殊资源池的资源进行V2X通信，最后当UE在目标小区完成资源感知和选择后，在目标小区采用感知得到的资源进行V2X通信；再或者，UE在目标小区完成同步和V2X相关系统消息获取后，随机选择系统消息中的特殊资源池的资源进行V2X通信，然后当UE在目标小区完成资源感知和选择后，在目标小区采用感知得到的资源进行V2X通信。
图9为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图9所示，本实施例提供的方法包括如下步骤。
步骤S9010，gNB配置小区重选信息和有效区域信息。
有效区域包括以下之一：RNA，系统消息有效区域。
有效区域信息包括：小区列表，即有效区域包含的小区。具体的有效区域信息通过系统消息广播。有效区域配置考虑速度因素和UE运动轨迹，如当UE速度较高时，有效区域包含的小区较多(RNA不超过跟踪区域TA的大小)，根据UE的运动轨迹设计有效区域，如在高速公路行驶时，则配置沿高速公路的小区为有效区域，以减少有效区域更新的频率。
步骤S9020，非激活态UE在源小区进行V2X通信。
UE在源小区采用自主选择资源方式进行V2X通信，并通过系统广播消息获取小区重选的配置信息。
步骤S9030，UE重选进入目标小区。
UE根据小区重选信息确定目标小区，如选择提供V2X通信的最高优先级的频率小区。
步骤S9040，UE判断目标小区是否属于新的有效区域，如果是，则转向步骤S9050，否则转向步骤S9060。
UE通过对比目标小区的系统消息中的有效区域标识和自身存储的有效区域标识是否相同判断是否为新的有效区域：如果系统消息有效区域标识不同，和/或者RNA标识不同，则说明为新的有效区域，否则为原来的有效区域。
步骤S9050，UE采用特殊资源池资源进行V2X通信。
目标小区为新的有效区域，UE在目标小区首先在特殊资源池中随机选择资 源用于V2X通信，其中特殊资源池由目标小区的系统消息指示，直到UE在目标小区完成对自主选择资源池的感知和资源选择后，然后采用新的自主选择资源用于V2X通信。如果新的有效区域属于新的RNA区域，则UE发起RNA位置更新过程，如果RNA周期性更新定时器超时，UE也发起RNA更新过程。
步骤S9060，UE在目标小区进行V2X通信。
UE在目标小区的特殊资源池中随机选择资源用于V2X通信，直到在目标小区完成对自主选择资源池的感知和选择，然后使用自主选择的资源进行V2X通信。
图10为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图10所示，本实施例提供的方法包括如下步骤。
步骤S10010，UE在NR小区进行边路V2X通信。
NR小区是指采用NR频率和相应NR通信技术的小区，UE为非激活态，采用自主选择资源进行边路V2X通信。
步骤S10020，UE确定选择E-UTRA目标小区。
UE进行小区重选过程中，没有发现NR目标小区，如没有相应的NR频率(可用于V2X通信)进行小区部署，或者NR小区的质量不满足V2X通信条件，但存在E-UTRA频率小区，可提供V2X通信，通信质量也满足V2X要求。UE根据系统消息中的小区重选规则进行小区重选，并确定E-UTRA目标小区。
步骤S10030，UE在目标小区进入空闲态或连接态。
UE在目标小区可选择进入空闲态或连接态，具体根据网络侧基站指示确定。
步骤S10040，UE在目标小区进行V2X通信。
UE在目标E-UTRA小区随机选择特殊资源池中资源用于V2X通信，其中特殊资源池由目标小区系统消息指示，如果UE在目标小区采用自主选择资源进行V2X通信，则直到UE在目标小区的自主选择资源池完成资源感知和选择后，UE采用自主选择的资源继续进行V2X通信；或者，如果UE在目标小区采用调度资源进行V2X通信，则直到UE在目标小区建立RRC连接并获取边路调度资源后，UE采用调度的资源继续进行V2X通信。
图11为一实施例提供的另一种用于边路通信的小区重选方法的流程图，如图11所示，本实施例提供的方法包括如下步骤。
步骤S11010，基站配置与终端速度相关的信息。
速度相关的信息包括以下之一：小区重选信息，系统消息有效区域信息， RNA信息等；其中，小区重选信息考虑UE当前的运动速度，如果为高速/中速，则通过改变小区重选参数加快小区重选的过程；系统消息有效区域可针对UE当前速度进行调整，如针对高速UE，可以扩大系统消息有效区域的范围；RNA同样也可以根据UE速度进行调整，如果为高速UE，则可以扩大RNA的范围。
步骤S11020，UE判断目前速度是否为普通，如果是，转向步骤S11030，否则转向步骤S11040。
UE通过比较预定时间内发起的小区重选数和预配置的门限值确定是否为普通速度，如果未超过门限值，则为普通速度，否则为中/高速度。
步骤S11030，UE采用普通的小区重选参数进行小区重选。
UE为普通速度，采用相应的小区重选参数进行小区重选，且保持原有的系统消息有效区域和RNA配置。
步骤S11040，UE判断目前速度是否为高速，如果是，转向步骤S11050，否则，转向步骤S11060。
如果UE的速度指标超过了门限值1，则为高速行驶，如果UE的速度指标低于门限值1，但高于门限值2，则为中速；其中门限值1和门限值2分别由gNB预配置，并通过系统消息通知UE。
步骤S11050，UE采用高速对应的小区重选参数进行小区重选。
高速对应的小区重选参数一般具有更短的小区重选定时器，为了防止乒乓重选效应，相应的迟滞值也减小。系统消息有效区域和RNA可扩大范围，即包含更多的小区。
步骤S11060，UE采用中速对应的小区重选参数进行小区重选。
本申请实施例中以V2X业务为例进行说明，本申请提供的用于边路通信的小区重选方法方法也可以应用于其他类型广播业务，如数字视频，机器类型通信(Machine Type Communication，MTC)，公共安全(Public Safety，PS)通信，集群关键任务一键通(Mission Critical Push To Talk，MCPTT)等。
图12为一实施例提供的一种用于边路通信的小区重选装置的结构示意图，如图12所示，本实施例提供的用于边路通信的小区重选装置设置于参与边路通信的非激活态的UE中，小区重选装置包括：
接收模块121，设置为接收小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；重选模块122，设置为根据小区重选信息和UE的能力信息进行小区重选。
本实施例提供的用于边路通信的小区重选装置用于实现图3所示实施例的 用于边路通信的小区重选方法，本实施例提供的用于边路通信的小区重选装置实现原理和技术效果类似，此处不再赘述。
图13为一实施例提供的另一种用于边路通信的小区重选装置的结构示意图，如图13所示，本实施例提供的用于边路通信的小区重选装置设置于提供边路通信的基站中，小区重选装置包括：
配置模块131，设置为配置小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；发送模块132，设置为发送小区重选信息。
本实施例提供的用于边路通信的小区重选装置用于实现图5所示实施例的用于边路通信的小区重选方法，本实施例提供的用于边路通信的小区重选装置实现原理和技术效果类似，此处不再赘述。
图14为一实施例提供的一种用于边路通信的小区重选系统的结构示意图，如图14所示，本实施例提供的用于边路通信的小区重选系统包括：UE 141和基站142。其中UE 141包括接收模块1411、处理模块1412和发送模块1413；基站142包括接收模块1421、处理模块1422和发送模块1423。接收模块1411用于通过空口接收基站142发送的小区重选配置信息和有效区域信息，以及接收对端终端发送的V2X业务数据；处理模块1412用于确定目标重选小区，以及选择用于边路PC5的V2X通信资源；发送模块1413用于向V2X通信对端的终端发送V2X数据，以及向基站142发送边路资源请求消息。接收模块1421负责接收UE 141在Uu口发送的V2X边路资源请求消息；处理模块1422负责调度V2X业务，还负责设置小区重选配置信息和有效区域信息；发送模块1423负责发送小区重选配置信息和有效区域信息到UE 141，还负责向UE 142发送V2X边路资源配置信息和特殊资源池配置信息。
其中UE 141中的接收模块1411用于实现接收模块121的功能，处理模块1422用于实现重选模块122的功能；基站142中的处理模块1422用于实现配置模块131的功能，发送模块1423用于实现发送模块132的功能。
图15为一实施例提供的一种UE的结构示意图，如图15所示，该UE包括处理器151、存储器152、发送器153和接收器154；UE中处理器151的数量可以是一个或多个，图15中以一个处理器151为例；UE中的处理器151和存储器152、发送器153和接收器154可以通过总线或其他方式连接，图15中以通过总线连接为例。
存储器152作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请图3或图4实施例中的用于边路通信的小区重选方法对应的程序指令/模块(例如，用于边路通信的小区重选装置中的接收 模块121和重选模块122)。处理器151通过运行存储在存储器152中的软件程序、指令以及模块，从而实现UE至少一种功能应用以及数据处理，即实现上述的用于边路通信的小区重选方法。
存储器152可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器152可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。
发送器153为能够将射频信号发射至空间中的模块或器件组合，例如包括射频发射机、天线以及其他器件的组合。接收器154为能够从空间中接收射频信号的模块或器件组合，例如包括射频接收机、天线以及其他器件的组合。
图16为一实施例提供的一种基站的结构示意图，如图16所示，该基站包括处理器161、存储器162、发送器163和接收器164；基站中处理器161的数量可以是一个或多个，图16中以一个处理器161为例；基站中的处理器161和存储器162、发送器163和接收器164可以通过总线或其他方式连接，图16中以通过总线连接为例。
存储器162作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请图5或图6实施例中的用于边路通信的小区重选方法对应的程序指令/模块(例如，用于边路通信的小区重选装置中的配置模块131和发送模块132)。处理器161通过运行存储在存储器162中的软件程序、指令以及模块，从而实现基站至少一种功能应用以及数据处理，即实现上述的用于边路通信的小区重选方法。
存储器162可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器162可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。
发送器163为能够将射频信号发射至空间中的模块或器件组合，例如包括射频发射机、天线以及其他器件的组合。接收器164为能够从空间中接收射频信号的模块或器件组合，例如包括射频接收机、天线以及其他器件的组合。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种用于边路通信的小区重选方法，该方法包括：参与边路通信的非激活态的UE接收小区重选信息，小区重选信息 包括：用于实现边路通信业务连续性的小区重选信息；UE根据小区重选信息和UE的能力信息进行小区重选。。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种用于边路通信的小区重选方法，该方法包括：提供边路通信的基站配置小区重选信息，小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；基站发送小区重选信息。
本领域内的技术人员应明白，术语用户终端涵盖任何适合类型的无线用户设备，例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说，本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如，一些方面可以被实现在硬件中，而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中，尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现，例如在处理器实体中，或者通过硬件，或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(InstructionSet Architecture，ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(Read-Only Memory，ROM)、随机访问存储器(Random Access Memory，RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc，DVD)或光盘(Compact Disc，CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、可编程逻辑器件(Field-Programmable Gate Array，FPGA)以及基于多核处理器架构的处理器。

Claims (21)

  1. 一种用于边路通信的小区重选方法，包括：
    参与边路通信的非激活态的用户设备UE接收小区重选信息，所述小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
    所述UE根据所述小区重选信息和所述UE的能力信息进行小区重选。
  2. 根据权利要求1所述的方法，其中，所述小区重选信息包括小区重选频率优先级和边路通信配置信息。
  3. 根据权利要求2所述的方法，其中，所述小区重选频率优先级包括能提供边路通信的且与所述UE的源小区相同频率和不同频率的优先级，所述边路通信配置信息包括用于边路通信的边路资源配置信息。
  4. 根据权利要求1所述的方法，其中，所述UE根据所述小区重选信息和所述UE的能力信息进行小区重选，包括：
    所述UE选择能够提供边路通信的目标小区进行小区重选。
  5. 根据权利要求1所述的方法，其中，所述用于实现边路通信业务连续性的小区重选信息，包括：
    在感兴趣或正在进行边路通信的所述UE需要进行小区重选的情况下，选择能够提供边路通信的目标小区进行小区重选的信息。
  6. 根据权利要求1所述的方法，还包括：
    在所述UE不支持在重选后的小区进行边路通信的情况下，采用预配置的边路通信资源进行边路通信。
  7. 根据权利要求1所述的方法，其中，所述UE的能力信息，包括：
    所述UE在相同无线接入技术RAT和不同RAT中的至少之一上进行边路通信的能力，以及所述UE被允许进行边路通信的RAT类型。
  8. 根据权利要求2～7中任一项所述的方法，其中，所述UE根据所述小区重选信息和所述UE的能力信息进行小区重选，包括：
    在所述UE的源小区的第一频率为提供边路通信的频率的情况下，所述UE将所述第一频率作为小区重选最高优先级；
    在所述UE在提供边路通信的小区覆盖范围外的情况下，所述UE将第二频率作为所述小区重选最高优先级，所述第二频率为提供边路通信资源的小区的频率。
  9. 根据权利要求1～7中任一项所述的方法，还包括：所述UE接收以下信息中的至少之一：
    基于无线接入网的通知区域RNA，系统消息有效区域；
    在所述UE根据所述小区重选信息和所述UE的能力信息进行小区重选之后，还包括：
    所述UE进行小区重选后，在所述RNA和系统消息有效区域中的至少之一内使用源小区的边路通信资源。
  10. 根据权利要求1～7中任一项所述的方法，还包括：
    所述UE接收用于小区重选的特殊资源池配置信息；
    所述UE根据所述小区重选信息和所述UE的能力信息进行小区重选，包括：
    所述UE根据所述小区重选信息和所述UE的能力信息进行小区重选，并根据所述特殊资源池配置信息选择用于边路通信的传输资源。
  11. 根据权利要求1～7中任一项所述的方法，还包括：
    所述UE接收用于小区重选的速度相关配置信息；
    所述UE根据所述小区重选信息和所述UE的能力信息进行小区重选，包括：
    所述UE根据当前运动速度确定与所述当前运动速度对应的速度相关配置信息，根据所述速度相关配置信息指示的小区重选信息和所述UE的能力信息进行小区重选。
  12. 一种用于边路通信的小区重选方法，包括：
    提供边路通信的基站配置小区重选信息，所述小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
    所述基站发送所述小区重选信息。
  13. 根据权利要求12所述的方法，其中，所述小区重选信息包括小区重选频率优先级和边路通信配置信息。
  14. 根据权利要求13所述的方法，其中，所述小区重选频率优先级包括能提供边路通信的频率优先级，所述边路通信配置信息包括用于边路通信的边路资源配置信息。
  15. 根据权利要求12所述的方法，其中，所述用于实现边路通信业务连续性的小区重选信息，包括：
    在感兴趣或正在进行边路通信的UE需要进行小区重选的情况下，选择能够提供边路通信的目标小区进行小区重选的信息。
  16. 根据权利要求12～15中任一项所述的方法，还包括：
    所述基站发送以下信息中的至少之一：
    基于无线接入网的通知区域RNA，系统消息有效区域。
  17. 根据权利要求12～15中任一项所述的方法，还包括：
    所述基站发送用于小区重选的特殊资源池配置信息。
  18. 根据权利要求12～15中任一项所述的方法，还包括：
    所述基站发送用于小区重选的速度相关配置信息，所述速度相关配置信息指示至少一个小区重选信息，所述速度相关配置信息与进行小区重选的UE的速度对应。
  19. 一种用于边路通信的小区重选装置，设置于参与边路通信的非激活态的用户设备UE中，包括：
    接收模块，设置为接收小区重选信息，所述小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
    重选模块，设置为根据所述小区重选信息和所述UE的能力信息进行小区重选。
  20. 一种用于边路通信的小区重选装置，设置于提供边路通信的基站中，包括：
    配置模块，设置为配置小区重选信息，所述小区重选信息包括：用于实现边路通信业务连续性的小区重选信息；
    发送模块，设置为发送所述小区重选信息。
  21. 一种用于边路通信的小区重选系统，包括：用户设备UE和基站，所述UE处于非激活态，所述基站提供边路通信；
    所述UE包括如权利要求19所述的用于边路通信的小区重选装置；
    所述基站包括如权利要求20所述的用于边路通信的小区重选装置。
PCT/CN2020/089334 2019-09-04 2020-05-09 用于边路通信的小区重选方法、装置和系统 WO2021042758A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20859705.4A EP4027698A4 (en) 2019-09-04 2020-05-09 CELL RESELECTION METHOD, APPARATUS AND SYSTEM FOR SIDELINK COMMUNICATIONS
US17/640,770 US20220312291A1 (en) 2019-09-04 2020-05-09 Cell reselection method, apparatus and system for sidelink communication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910833916.8A CN110536368A (zh) 2019-09-04 2019-09-04 用于边路通信的小区重选方法、装置和系统
CN201910833916.8 2019-09-04

Publications (1)

Publication Number Publication Date
WO2021042758A1 true WO2021042758A1 (zh) 2021-03-11

Family

ID=68667026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/089334 WO2021042758A1 (zh) 2019-09-04 2020-05-09 用于边路通信的小区重选方法、装置和系统

Country Status (4)

Country Link
US (1) US20220312291A1 (zh)
EP (1) EP4027698A4 (zh)
CN (1) CN110536368A (zh)
WO (1) WO2021042758A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536368A (zh) * 2019-09-04 2019-12-03 中兴通讯股份有限公司 用于边路通信的小区重选方法、装置和系统
CN111050372B (zh) * 2019-12-23 2021-10-29 高新兴物联科技有限公司 5g rrc状态转换方法、装置、终端及可读存储介质
CN114846835A (zh) * 2020-01-15 2022-08-02 华为技术有限公司 通信方法、装置及系统
CN113329324B (zh) * 2020-02-28 2023-04-04 华为技术有限公司 一种通信方法及相关设备
WO2021258398A1 (en) * 2020-06-27 2021-12-30 Nec Corporation Method for communications, terminal device, and computer readable medium
US11751108B2 (en) * 2020-08-05 2023-09-05 Qualcomm Incorporated Execution of reduced signaling handover
WO2022036487A1 (en) * 2020-08-17 2022-02-24 Qualcomm Incorporated Resolving radio resource control (rrc) state mismatch for vehicle-to-everything (v2x) transmissions
EP4199591A4 (en) * 2020-09-01 2024-02-07 LG Electronics Inc. METHOD AND DEVICE FOR RESELECTING A HETERGENEOUS NETWORK FOR SIDELINK FORWARDING
CN115734299A (zh) * 2021-08-31 2023-03-03 展讯通信（上海）有限公司 一种小区重选方法、装置及终端设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106879009A (zh) * 2017-03-24 2017-06-20 电信科学技术研究院 一种小区重选方法、用户设备及网络侧设备
CN109996332A (zh) * 2018-01-03 2019-07-09 维沃移动通信有限公司 驻留的方法和设备
WO2019137337A1 (zh) * 2018-01-09 2019-07-18 维沃移动通信有限公司 小区选择方法、终端及网络设备
CN110536368A (zh) * 2019-09-04 2019-12-03 中兴通讯股份有限公司 用于边路通信的小区重选方法、装置和系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106879009A (zh) * 2017-03-24 2017-06-20 电信科学技术研究院 一种小区重选方法、用户设备及网络侧设备
CN109996332A (zh) * 2018-01-03 2019-07-09 维沃移动通信有限公司 驻留的方法和设备
WO2019137337A1 (zh) * 2018-01-09 2019-07-18 维沃移动通信有限公司 小区选择方法、终端及网络设备
CN110536368A (zh) * 2019-09-04 2019-12-03 中兴通讯股份有限公司 用于边路通信的小区重选方法、装置和系统

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
OPPO: "Discussion on Inter-RAT Control", 3GPP DRAFT; R2-1905567 - DISCUSSION ON INTER-RAT CONTROL FOR NR-V2X, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Reno, US; 20190513 - 20190517, 13 May 2019 (2019-05-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051729071 *
See also references of EP4027698A4
ZTE, ZTE MICROELECTRONICS: "Service sensitive cell selection and reselection in NR", 3GPP DRAFT; R2-1701388 SERVICE SENSITIVE CELL SELECTION AND RESELECTION IN NR, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Athens, Greece; 20170213 - 20170217, 12 February 2017 (2017-02-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051212045 *

Also Published As

Publication number Publication date
US20220312291A1 (en) 2022-09-29
EP4027698A1 (en) 2022-07-13
CN110536368A (zh) 2019-12-03
EP4027698A4 (en) 2023-09-06

Similar Documents

Publication Publication Date Title
WO2021042758A1 (zh) 用于边路通信的小区重选方法、装置和系统
WO2021204232A1 (zh) 启动方法及装置、重选方法及装置、设备、存储介质
JP7008749B2 (ja) システム情報の付加的な送信
US11737051B2 (en) System information transmission method and apparatus
CN105580399B (zh) 传输对系统信息的区域范围加以延伸的指示符
CN109792705B (zh) 同时多rat驻留的协调
CN110536365B (zh) Cho资源处理方法、装置和系统
EP2974408B1 (en) Communications methods and apparatus that facilitate discovery of small coverage area base stations
US20180007606A1 (en) Method and apparatus for performing switching control between uplink and sidelink in wireless communication system
CN107431999B (zh) 用于寻呼的装置和方法
CN103975628A (zh) 多载波多无线接入技术网络中的信道选择
CN107113664B (zh) 用于设备到设备通信中切换的改进的报告
EP3890389A1 (en) Wireless network communication method, base station, terminal and communication device
CN114845393A (zh) 发送、接收寻呼消息的方法、装置、设备及存储介质
CN109479238A (zh) 用于按需传输系统信息的移动电信系统方法、用户装备、以及基站
US20160080991A1 (en) GERAN Frequency Based Insight Delivery To Mobile Devices
CN116235551A (zh) 用于中继服务的系统和方法
WO2016165385A1 (zh) 接入控制方法、通信节点和计算机存储介质
US20230019791A1 (en) Apparatus and method of wireless communication
WO2021230784A1 (en) Methods, wireless devices and ran nodes for handling coverage holes in cells
JP7412560B2 (ja) デュアル接続アンカのアクセス方法、機器および記憶媒体
CN107736076B (zh) 连接配置
WO2016180367A1 (zh) 信息处理方法及通信节点
CN114557120A (zh) 侧链路传送连续性
CN114930916A (zh) 基于ue组的小区重选

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20859705

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020859705

Country of ref document: EP

Effective date: 20220404