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WO2016179832A1 - 中继选择或重选方法、装置和系统 - Google Patents

中继选择或重选方法、装置和系统 Download PDF

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Publication number
WO2016179832A1
WO2016179832A1 PCT/CN2015/078961 CN2015078961W WO2016179832A1 WO 2016179832 A1 WO2016179832 A1 WO 2016179832A1 CN 2015078961 W CN2015078961 W CN 2015078961W WO 2016179832 A1 WO2016179832 A1 WO 2016179832A1
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WO
WIPO (PCT)
Prior art keywords
relay
identifier
remote terminal
relay device
rnti
Prior art date
Application number
PCT/CN2015/078961
Other languages
English (en)
French (fr)
Inventor
吴联海
徐海博
周华
Original Assignee
富士通株式会社
吴联海
徐海博
周华
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 富士通株式会社, 吴联海, 徐海博, 周华 filed Critical 富士通株式会社
Priority to CN201580079112.3A priority Critical patent/CN107535012B/zh
Priority to PCT/CN2015/078961 priority patent/WO2016179832A1/zh
Publication of WO2016179832A1 publication Critical patent/WO2016179832A1/zh
Priority to US15/810,996 priority patent/US10849041B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15507—Relay station based processing for cell extension or control of coverage area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • 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
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • 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
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to the field of communications, and in particular, to a relay selection or reselection method, apparatus and system.
  • the sidelink communication mode means that the data packet does not need to pass through the core network and the base station, and the communication link is directly established between the user 1 and the user 2 to perform communication.
  • the discovery process is generally performed before the side link communication is performed. For example, before the user 2 sends a message to the user 1 through the side link communication method, it is first found whether the user 1 is nearby.
  • Figure 1 shows a schematic diagram of the discovery or establishment of side link communication where both users are under the coverage of the base station.
  • FIG. 2 is a schematic diagram of a user's discovery under the coverage of a base station and another user not under the coverage of the base station or establishing side link communication.
  • Figure 3 shows a schematic diagram of the discovery or establishment of side link communication where neither user is covered by the base station.
  • Side link communication can be used to expand cell coverage.
  • UE2 is located at the edge of the cell, and the signal is weak. It is likely to leave the cell coverage.
  • a terminal with relay function authorized by the network which is referred to as a relay, for example, UE1, in order to avoid service interruption.
  • the UE1 can access the base station through the relay UE1 to perform normal service communication.
  • UE2 is located in a network coverage area, and there is a terminal with a relay function authorized by the network nearby, for example, UE1, in order to communicate with the access network, UE2 discovers the relay UE1 located in the cell coverage.
  • the relay UE1 can access the base station to perform normal service communication.
  • the UE 2 is referred to as a remote terminal, and the terminal may be located within the cell coverage or may be located outside the cell coverage.
  • a terminal having a relay function, such as UE1 is called a UE-Network Relay, and is referred to as a relay in this application.
  • a relay located in a cell coverage may have a radio link failure (RLF). Once the radio link fails, it needs to be carried out. The relayed remote terminal will experience a service interruption until another suitable relay is selected.
  • RLF radio link failure
  • the embodiment of the present invention provides a relay selection or reselection method, device and system.
  • a relay reselection apparatus for use in a relay device, wherein the apparatus includes:
  • a monitoring unit that monitors a trigger condition for notifying the remote terminal to perform relay reselection
  • a determining unit configured to determine whether a trigger condition for notifying the remote terminal to perform relay reselection is satisfied
  • a transmitting unit when the triggering condition for relaying the remote terminal to perform relay reselection is satisfied, transmitting relay reselection indication information to the remote terminal relaying by the relay device, triggering the remote terminal to perform relaying Re-election
  • the trigger condition for notifying the remote terminal to perform relay reselection is that the T310 timer is started or the T310 timer is running or the T310 timer expires, or the notification of stopping the relay function is received, or the power of the relay device is received. insufficient.
  • a relay reselection apparatus for use in a remote terminal, wherein the apparatus includes:
  • a receiving unit that receives relay reselection indication information
  • a selection unit that triggers relay reselection after the receiving unit receives the relay reselection indication information.
  • a relay reselection apparatus which is applied to a base station, where the apparatus includes:
  • a receiving unit which receives channel measurement results of an edge link channel between the remote terminal and each relay device sent by the remote terminal, and a relay identifier of each relay device;
  • a selecting unit which selects a relay device for the remote terminal according to the channel measurement result and the relay identifier
  • the relay identifier of the relay device includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for the side link (ProSe relay UE) ID).
  • C-RNTI cell radio network temporary identifier
  • SL-RNTI edge link radio network temporary identifier
  • ProSe relay UE relay identifier for the side link
  • a relay reselection method which is applied to a relay device, where the method includes:
  • the relay reselection indication information is sent to the remote terminal that is relayed by the relay device, and the remote terminal is triggered to perform relay reselection;
  • the trigger condition for notifying the remote terminal to perform relay reselection is that the T310 timer is started or the T310 timer is running or the T310 timer expires, or the notification of stopping the relay function is received, or the power of the relay device is received. insufficient.
  • a relay reselection method which is applied to a remote terminal, where the method includes:
  • the relay reselection is triggered after receiving the relay reselection indication information.
  • a relay reselection method which is applied to a base station, where the method includes:
  • the relay identifier of the relay device includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for the side link (ProSe relay UE) ID).
  • C-RNTI cell radio network temporary identifier
  • SL-RNTI edge link radio network temporary identifier
  • ProSe relay UE relay identifier for the side link
  • a relay device wherein the relay device comprises the device of the aforementioned first aspect.
  • a remote terminal wherein the remote terminal comprises the apparatus of the aforementioned second aspect.
  • a base station wherein the base station comprises the apparatus of the foregoing third aspect.
  • a communication system wherein the communication system comprises the relay device of the aforementioned seventh aspect, the remote terminal of the foregoing eighth aspect, and the foregoing ninth aspect The base station.
  • the beneficial effects of the embodiments of the present invention are that, by using the embodiment of the present invention, the interruption time caused by the poor relay link can be reduced, and long-term service interruption can be avoided.
  • Figure 1 is a schematic diagram of a scenario in which an edge link is discovered or established
  • FIG. 2 is a schematic diagram of another scenario of discovering or establishing an edge link
  • FIG. 3 is a schematic diagram of still another scenario of discovering or establishing an edge link
  • FIG. 6 is a flow diagram of one embodiment of a remote terminal performing relay reselection
  • FIG. 7 is a flow chart of another embodiment of a remote terminal performing relay reselection
  • FIG. 9 is a schematic diagram of information interaction of the relay reselection method according to the embodiment.
  • FIG. 10 is a schematic diagram showing the composition of a relay reselection apparatus of Embodiment 4.
  • FIG. 11 is a schematic diagram showing the composition of a relay reselection apparatus of Embodiment 5;
  • FIG. 12 is a schematic diagram showing the composition of an embodiment of a selection unit of the relay reselection apparatus of FIG. 11;
  • FIG. 13 is a schematic diagram showing the composition of another embodiment of a selection unit of the relay reselection apparatus of FIG. 11;
  • Figure 14 is a schematic diagram showing the composition of a relay reselection apparatus of Embodiment 6;
  • FIG. 16 is a schematic diagram showing the composition of a remote terminal of Embodiment 8.
  • FIG. 17 is a schematic diagram showing the composition of a base station of Embodiment 9;
  • FIG. 18 is a schematic diagram showing the topology of a communication system of Embodiment 10.
  • An embodiment of the present invention provides a relay reselection method, where the method can be applied to a relay device, such as a terminal device in a cell coverage, where the terminal device is selected as a relay by a remote terminal by using a discovery mechanism. It functions as a relay device of the remote terminal.
  • a relay device such as a terminal device in a cell coverage
  • the terminal device is selected as a relay by a remote terminal by using a discovery mechanism. It functions as a relay device of the remote terminal.
  • 4 is a flow chart of the method. Referring to FIG. 4, the method includes:
  • Step 401 The relay device monitors a trigger condition for notifying the remote terminal to perform relay reselection.
  • Step 402 The relay device determines whether the trigger condition for notifying the remote terminal to perform relay reselection is satisfied, and if yes, executing step 403, otherwise returning to step 401;
  • Step 403 The relay device sends relay reselection indication information to the remote terminal that is relayed by the relay device, and triggers the remote terminal to perform relay reselection.
  • the triggering condition for informing the remote terminal to perform the relay reselection may be that the air interface channel of the relay device is out of synchronization or is about to lose synchronization.
  • the relay device detects When there is a problem in the physical layer of the primary cell (PCell), for example, the relay device receives the N310 (the threshold configured by the network) consecutive consecutive out-of-synchronization indication, then the T310 timer is started, and the T310 timer runs for a period of time.
  • the N310 the threshold configured by the network
  • the remote terminal that uses the relay device as a relay transmits relay reselection indication information to trigger the remote terminal to perform relay reselection.
  • the relay reselection indication information may be a relay air interface Temporarily interrupted discovery information.
  • the trigger condition for notifying the remote terminal to perform relay reselection may be that the relay device receives the notification of stopping the relay function.
  • the network side for example, the eNB, may notify the relay device to stop the relay function, and the relay device of the present embodiment considers that the remote terminal performs the relay reselection upon receiving the notification from the network side.
  • the relay reselection indication information is sent to the remote terminal that is relayed by the relay device to trigger the remote terminal to perform relay reselection.
  • the relay reselection indication information may be discovery information including a relay function temporary stop indication information.
  • the triggering condition for notifying the remote terminal to perform relay reselection may be that the power of the relay device is insufficient, and the insufficient power may cause shutdown, thereby possibly causing the remote terminal to be used as the relay. A business disruption occurred. Therefore, in the embodiment, the relay device can also monitor its own battery power. If it is found that the battery power is insufficient, it is considered that the trigger condition for notifying the remote terminal to perform relay reselection is satisfied, and the relay device is used as the middle.
  • the relaying remote terminal sends the relay reselection indication information to trigger the remote terminal to perform relay reselection.
  • the relay reselection indication information may be discovery information including the low battery indication information.
  • the triggering condition for notifying the remote terminal to perform relay reselection in the above embodiment is merely an example, and the embodiment is not limited thereto.
  • the relay device triggers the remote terminal to perform relay reselection when the trigger condition for notifying the remote terminal to perform relay reselection is satisfied, thereby avoiding the remote terminal caused by the link failure of the relay device. Business disruption.
  • the relay reselection indication information may be sent by the foregoing relay device to the remote terminal by using an edge link transmission.
  • the relay reselection indication information may include: a relay identifier of the relay device, and a temporary interruption of the air interface connection and/or a service cell stop relay function and/or a power shortage of the relay device, etc. .
  • the relay identifier of the relay device is used to notify the remote terminal that the relay device can no longer be used as a relay, and the relay identifier of the relay device may include: a cell radio network temporary identifier (C-RNTI), a side Link Radio Network Temporary Identity (SL-RNTI), or ProSe relay UE ID for the side link, and the like.
  • C-RNTI cell radio network temporary identifier
  • SL-RNTI side Link Radio Network Temporary Identity
  • ProSe relay UE ID for the side link
  • the relay reselection indication information may be sent by the relay device to the base station through an air interface, and forwarded by the base station to the remote terminal.
  • the relay reselection indication information may include: a terminal identifier of the remote terminal, and an air interface connection is about to be interrupted and/or a relay device. Insufficient power, etc.
  • the terminal identifier of the remote terminal is used to notify the base station to use the foregoing relay device as a remote terminal for relaying, and the terminal identifier of the remote terminal may include: a cell radio network temporary identifier (C-RNTI), and an edge link wireless network.
  • C-RNTI cell radio network temporary identifier
  • the relay reselection indication information may further include a relay identifier of the foregoing relay device, to inform the base station which relay device can no longer serve as a relay of the remote terminal, where When the transmission resource allocated by the base station to the relay device is determined, the relay identifier of the relay device may not be included, and the base station may determine the relay device according to the location of receiving the information.
  • the base station may notify the remote terminal of the information to trigger the remote terminal to perform relay reselection.
  • the notification to the remote terminal is also optional, and the base station may trigger the remote terminal to perform relay reselection by other means.
  • the relay device may further receive a terminal identifier of the remote terminal that is transmitted by the remote terminal through the side link, and send the relay to the remote terminal by using the side link transmission.
  • the identifier; or the relay device actively broadcasts its own relay identifier through the side link transmission, so that the remote terminal receiving the relay identifier uses the relay device as an alternative for its own relay.
  • the relay identifier of the relay device and the terminal identifier of the remote terminal have been described above, and are not described here.
  • the embodiment of the present invention provides a relay reselection method, which is applied to a remote terminal, and is a process of the remote terminal side corresponding to the method of Embodiment 1, wherein the same content as Embodiment 1 is not repeatedly described.
  • the remote terminal may be located within the cell coverage or may have no cell coverage, and may discover the relay through the side link transmission.
  • Figure 5 is a flow chart of the method. Referring to Figure 5, the method includes:
  • Step 501 The remote terminal receives the relay reselection indication information.
  • Step 502 The remote terminal triggers relay reselection after receiving the relay reselection indication information.
  • the remote terminal may receive relay reselection indication information sent by the relay device by using the side link transmission, where the relay reselection indication information may be included in the discovery information sent by the relay device; Receiving relay reselection indication information sent by the base station through the air interface (dedicated signaling), as described above, The contents are incorporated herein and will not be described here.
  • the remote terminal Upon receiving the relay reselection indication information, the remote terminal is triggered to perform relay reselection.
  • relay reselection may be performed by using the method of FIG. 6. Referring to FIG. 6, the method includes:
  • Step 601 Discover the relay device by using the side link transmission
  • Step 602 Measure an edge link channel between the remote terminal and each relay device.
  • Step 603 Select a relay device according to channel quality and battery remaining amount of the edge link channel.
  • the relay device can be implemented by a conventional discovery mechanism, or can be implemented by the discovery mechanism of this embodiment.
  • the discovery mechanism of this embodiment is described below.
  • each relay device broadcasts its own relay identifier through the side link transmission, and the remote terminal in this embodiment receives each relay device that each relay device transmits and broadcasts through the side link.
  • the relay identifier thereby discovering each relay device.
  • the remote terminal broadcasts its own terminal identifier through the side link transmission, and receives the relay identifier of each relay device transmitted by each relay device through the side link, thereby discovering Each relay device.
  • the relay identifier of the relay device and the terminal identifier of the remote terminal have been described in detail in Embodiment 1, and details are not described herein again.
  • the relay identifier of the relay device and the terminal identifier of the remote terminal may be sent by using conventional discovery information.
  • the embodiment does not limit other content included in the discovery information.
  • the discovery information may further include a PLMN ID (Public Land Mobile Network ID), an APN (Access Point Name) information, and the like.
  • the remote terminal measures the channel quality of the side link channel between the remote terminal and each of the relay devices, and the specific measurement method is not limited.
  • the remote terminal may select a suitable relay device as its own relay according to the measured channel quality of each side link channel and its own battery remaining amount.
  • relay reselection may also be performed by using the method of FIG. 7. Referring to FIG. 7, the method includes:
  • Step 701 Discover the relay device by using the side link transmission.
  • Step 702 Measure an edge link channel between the remote terminal and each relay device.
  • Step 703 Send the measurement result and the relay identifier of each relay device to the base station.
  • Step 704 Receive relay device indication information sent by the base station.
  • Step 705 Determine, according to the relay device indication information, a relay device selected by the base station for the remote terminal.
  • Steps 701-702 are the same as steps 601-602 of the embodiment shown in FIG. 6, the contents of which are incorporated herein, and are not described herein again.
  • the remote terminal transmits the measurement result and the relay identifier of each relay device to the base station, and the base station selects a suitable relay for it.
  • the relay identifier of the relay device is as described above.
  • the remote terminal may receive the relay device indication information returned by the base station, and the base station may send the information to the remote terminal by using dedicated signaling.
  • the remote terminal may determine, according to the received indication information returned by the base station, the relay device selected by the base station.
  • a process in which a remote terminal performs relay reselection is described by using FIG. 6 and FIG. 7.
  • the remote terminal may perform relay selection by using the methods in FIG. 6 and FIG. As mentioned earlier, I will not go into details here.
  • the remote terminal may send a connection establishment request to the selected relay to establish a connection with the relay. Then, after successfully accessing the new relay, the remote terminal can release the link with the old relay.
  • the remote terminal can reselect a suitable relay, thereby avoiding service interruption caused by the failure of the original relay link.
  • the embodiment of the present invention provides a relay reselection method, which is applied to a base station, and is a base station side processing corresponding to the methods of Embodiment 1 and Embodiment 2, wherein the same content as Embodiment 1 and Embodiment 2 is provided. The description will not be repeated.
  • Figure 8 is a flow chart of the method. Referring to Figure 8, the method includes:
  • Step 801 Receive channel measurement results of the edge link channel between the remote terminal and each relay device sent by the remote terminal, and a relay identifier of each relay device.
  • Step 802 Select a relay setting for the remote terminal according to the channel measurement result and the relay identifier.
  • Step 803 Notifying the selected relay device to the remote terminal.
  • the base station after receiving the channel measurement result sent by the remote terminal and the relay identifier of each relay device, the base station selects a suitable relay device for the remote terminal, and informs the remote terminal, This helps the remote terminal complete the relay reselection, avoiding the service interruption caused by the failure of the original relay link.
  • the remote terminal may transmit the above channel measurement result and the relay identifier through the previous relay.
  • the base station may select a suitable relay device for the remote terminal according to the channel measurement result of the edge link between the remote terminal and each relay device, and the specific selection policy is not limited.
  • the base station may notify the remote terminal of the selected relay device by using dedicated signaling, but this embodiment is not limited thereto.
  • the base station may further assist the relay device to instruct the remote terminal to perform relay reselection, and the base station may further receive relay reselection indication information sent by the relay device, where the relay The reselection indication information includes: a temporary interruption of the air interface connection and/or a shortage of the power of the relay device, and a terminal identifier of the remote terminal; sending the relay reselection indication information to the remote terminal, indicating that the remote terminal is in progress Following the re-election.
  • the relay reselection indication information may further include a relay identifier of the foregoing relay device, so that the base station identifies the relay device.
  • the relay reselection indication information can be sent by the base station to the remote terminal by using dedicated signaling.
  • the base station may further instruct the relay device to stop the relay function, and the base station may further send the indication information of stopping the relay function to the relay device, to indicate that the relay device is stopped. Following the function.
  • the base station may send the foregoing information by using RRC signaling, or may send the information by using other signaling.
  • the relay identifier of the relay device and the terminal identifier of the remote terminal have been described in detail in Embodiment 1, and details are not described herein again.
  • the base station can assist the relay device to instruct the remote terminal to perform relay reselection, and assist the remote terminal to reselect the relay, thereby avoiding service interruption caused by the relay link failure.
  • FIG. 9 is a schematic diagram of information exchange of the relay reselection method according to the embodiment. The processing procedures of the base station, the relay device, and the remote terminal can be seen from FIG. 9.
  • Embodiments of the present invention provide a relay reselection apparatus, which is applied to a relay device, such as a terminal device within a cell coverage, which is selected as a relay by a certain remote terminal, and the principle of the device is solved by the device.
  • a relay device such as a terminal device within a cell coverage
  • the principle of the device is solved by the device.
  • the method of Embodiment 1 is similar, and therefore, the specific implementation thereof can be referred to the implementation of the method of Embodiment 1, and the description of the same portions will not be repeated.
  • FIG. 10 is a schematic diagram of the composition of the relay reselection apparatus.
  • the apparatus 1000 includes: a monitoring unit 1001, a determining unit 1002, and a sending unit 1003, where:
  • the monitoring unit 1001 is configured to monitor a trigger condition for notifying the remote terminal to perform relay reselection
  • the determining unit 1002 is configured to determine whether a trigger condition for notifying the remote terminal to perform relay reselection is satisfied;
  • the transmitting unit 1003 is configured to: when the triggering condition for the relaying the remote terminal to perform the relay reselection is satisfied, send the relay reselection indication information to the remote terminal that is relayed by the relay device, and trigger the remote terminal to perform the process. Following re-election;
  • the relay reselection trigger condition is that the air interface channel of the relay device is out of synchronization or is about to lose synchronization, or receives a notification that the relay function is stopped, or the power of the relay device is insufficient.
  • the sending unit 1003 may send the relay reselection indication information to the remote terminal by using edge link transmission, and trigger the remote terminal to perform relay reselection.
  • the relay reselection indication information includes: a relay identifier of the relay device, and a temporary interruption of the air interface connection and/or a serving cell stop relay function and/or a power shortage of the relay device.
  • the relay identifier of the relay device includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for the side link (ProSe relay UE) ID).
  • the sending unit 1003 may send the relay reselection indication information to the base station by using an air interface, and instruct the base station to notify the remote terminal to perform relay reselection.
  • the relay reselection indication information includes: a terminal identifier of the remote terminal, and an air interface connection is about to be interrupted and/or a power of the relay device is insufficient.
  • the terminal identifier of the remote terminal includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a terminal identifier (ProSe relay UE ID) for the side link.
  • the relay reselection indication information further includes: a relay identifier of the relay device, including: a cell radio network temporary identifier (C-RNTI), and an edge link radio network temporary identifier (SL-RNTI). Or a relay identifier (ProSe relay UE ID) for the side link.
  • a relay identifier of the relay device including: a cell radio network temporary identifier (C-RNTI), and an edge link radio network temporary identifier (SL-RNTI).
  • SL-RNTI edge link radio network temporary identifier
  • a relay identifier ProSe relay UE ID
  • the apparatus may further include:
  • the terminal identifier of the remote terminal includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a terminal identifier (ProSe relay UE ID) for the side link.
  • the sending unit 1003 is further configured to send the relay identifier of the relay device to the remote terminal by using edge link transmission, so that the remote terminal can discover the relay device.
  • the relay identifier of the relay device includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for the side link (ProSe relay UE) ID);
  • the sending unit 1003 is further configured to broadcast a relay identifier of the relay device by using an edge link, so that the remote terminal can discover the relay device.
  • the relay identifier of the relay device includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for the side link (ProSe relay UE) ID).
  • the relay device can trigger the remote terminal to perform relay reselection by sending the relay reselection indication information, thereby avoiding service interruption caused by the relay link failure.
  • An embodiment of the present invention provides a relay reselection apparatus, where the apparatus is applied to a remote terminal, and the remote terminal may be located in a cell coverage or may not have a cell coverage.
  • the principle of solving the problem by the apparatus is similar to the method of Embodiment 2. Therefore, the specific implementation can refer to the implementation of the method of Embodiment 2, and the description of the same portions is not repeated.
  • the apparatus 1100 includes: a receiving unit 1101 and a selecting unit 1102, where:
  • the receiving unit 1101 is configured to receive relay reselection indication information
  • the selecting unit 1102 is configured to trigger the relay reselection after the receiving unit 1101 receives the foregoing relay reselection indication information.
  • the receiving unit 1101 may receive relay reselection indication information sent by the relay device by using an edge link transmission, where the relay reselection indication information may be included in the discovery information.
  • the relay reselection indication information includes: a relay identifier of the relay device, and a temporary interruption of the air interface connection and/or a serving cell stop relay function and/or a power shortage of the relay device.
  • the relay identifier of the relay device includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for the side link (ProSe relay UE) ID).
  • the receiving unit 1101 may receive relay reselection indication information sent by the base station through the air interface, and the relay reselection indication information may be transmitted through dedicated signaling.
  • the relay reselection indication information includes: a terminal identifier of the remote terminal, and an air interface connection is about to be interrupted and/or a power of the relay device is insufficient.
  • the terminal identifier of the remote terminal includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a terminal identifier (ProSe relay UE ID) for the side link.
  • the relay reselection indication information may further include: a relay identifier of the relay device, where: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), Or a relay identifier (ProSe relay UE ID) for the side link.
  • C-RNTI cell radio network temporary identifier
  • SL-RNTI edge link radio network temporary identifier
  • ProSe relay UE ID a relay identifier for the side link.
  • the selecting unit 1102 may include: a first discovery module 1201, a first measurement module 1202, and a first selection module 1203.
  • the first discovery module 1201 is configured to transmit a discovery relay device by using an edge link;
  • the first measurement module 1202 is configured to measure an edge link channel between the remote terminal and each relay device;
  • the module 1203 is configured to select one relay device according to channel quality and battery remaining amount of the side link channel.
  • the first discovery module 1201 may discover the relay device by receiving a relay identifier of the relay device that is transmitted by the relay device through the side link.
  • the relay identifier of the relay device is: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier (ProSe relay UE ID) for the side link. ).
  • the first discovery module 1202 may also broadcast the terminal identifier of the remote terminal by using an edge link, and receive a relay identifier of the relay device that is transmitted by the relay device by using the side link to discover the middle. Following the device.
  • the terminal identifier of the remote terminal is: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a terminal identifier (ProSe UE ID) for the side link.
  • the relay identifier of the relay device is: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for a side link (ProSe relay UE) ID).
  • the selecting unit 1102 may include: a second discovery module 1301 , a second measurement module 1302 , a sending module 1303 , a receiving module 1304 , and a determining module 1305 .
  • the second discovery module 1301 is configured to transmit a discovery relay device by using an edge link;
  • the second measurement module 1302 is configured to measure an edge link channel between the remote terminal and each relay device;
  • the sending module 1303 Sending the measurement result and the relay identifier of each relay device to the base station;
  • the receiving module 1304 is configured to receive the relay device indication information sent by the base station;
  • the determining module is configured to determine, according to the relay device indication information, the base station The remote The relay device selected by the terminal.
  • the second discovery module 1301 may discover the relay device by receiving a relay identifier of the relay device that is transmitted by the relay device through the side link.
  • the relay identifier of the relay device is: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier (ProSe relay UE ID) for the side link. ).
  • the second discovery module 1302 may also broadcast a terminal identifier of the remote terminal by using an edge link, and receive a relay identifier of the relay device that is transmitted by the relay device by using an edge link to discover the middle. Following the device.
  • the terminal identifier of the remote terminal is: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a terminal identifier (ProSe UE ID) for the side link.
  • the relay identifier of the relay device is: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for a side link (ProSe relay UE) ID).
  • the remote terminal can trigger the relay reselection according to the relay reselection indication information, thereby avoiding service interruption caused by the relay link failure.
  • the embodiment of the present invention provides a relay reselection device, which is applied to a base station.
  • the principle of the device is similar to that of the third embodiment. Therefore, the specific implementation may refer to the implementation of the method in the third embodiment. The description of the content is not repeated.
  • the apparatus 1400 includes: a receiving unit 1401, a selecting unit 1402, and a sending unit 1403, where:
  • the receiving unit 1401 is configured to receive a channel measurement result of the edge link channel between the remote terminal and each relay device sent by the remote terminal, and a relay identifier of each relay device;
  • the selecting unit 1402 is configured to select a relay device for the remote terminal according to the channel measurement result and the relay identifier
  • the transmitting unit 1403 is configured to notify the selected relay device to the remote terminal.
  • the relay identifier of the relay device includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a relay identifier for the side link (ProSe relay UE) ID).
  • C-RNTI cell radio network temporary identifier
  • SL-RNTI edge link radio network temporary identifier
  • ProSe relay UE relay identifier for the side link
  • the receiving unit 1401 is further configured to receive the relay reselection indication information sent by the relay device, where the relay reselection indication information includes: the air interface connection is about to be interrupted and/or the relay device Electricity Insufficient amount and terminal identification of the remote terminal.
  • the sending unit 1403 is further configured to send the relay reselection indication information to the remote terminal, and trigger the remote terminal to perform relay reselection.
  • the terminal identifier of the remote terminal includes: a cell radio network temporary identifier (C-RNTI), an edge link radio network temporary identifier (SL-RNTI), or a terminal identifier (ProSe relay UE ID) for the side link.
  • the relay reselection indication information further includes: a relay identifier of the relay device.
  • the sending unit 1403 is further configured to send the stop relay function indication information to the relay device to instruct the relay device to stop the relay function.
  • the base station can assist the relay device to trigger the remote terminal to perform relay reselection, and assist the remote terminal to reselect the relay, thereby avoiding service interruption caused by the relay link failure.
  • the embodiment of the present invention further provides a relay device, which may be a terminal device (UE) within a cell coverage, where the relay device includes the relay reselection device described in Embodiment 4.
  • a relay device which may be a terminal device (UE) within a cell coverage, where the relay device includes the relay reselection device described in Embodiment 4.
  • FIG. 15 is a schematic diagram of the composition of a relay device according to an embodiment of the present invention.
  • the relay device 1500 can include a central processor 1501 and a memory 1502; the memory 1502 is coupled to the central processor 1501.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the functions of the relay reselection device may be integrated into the central processor 1501, and the function of the relay reselection feedback device described in Embodiment 4 is implemented by the central processor 1501, wherein the relay reselection The functions of the device are incorporated herein and will not be described again.
  • the relay reselection device may be configured separately from the central processing unit 1501.
  • the relay reselection device may be configured as a chip connected to the central processing unit 1501, and implemented by the control of the central processing unit 1501. Following the function of the reselection device.
  • the relay device 1500 may further include: a communication module 1503, an input unit 1504, an audio processing unit 1505, a display 1506, and a power supply 1507. It should be noted that the relay device 1500 does not have to include all the components shown in FIG. 15; in addition, the relay device 1500 may further include components not shown in FIG. 15, and reference may be made to the related art.
  • central processor 1501 also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls the relay device. The operation of the various components of the 1500.
  • the memory 1502 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
  • Various information can be stored, and a program for executing related information can be stored.
  • the central processing unit 1501 can execute the program stored by the memory 1502 to implement information storage or processing and the like.
  • the functions of other components are similar to those of the existing ones and will not be described here.
  • the various components of the relay device 1500 can be implemented by dedicated hardware, firmware, software, or a combination thereof without departing from the scope of the invention.
  • the remote terminal can be triggered to perform relay reselection, thereby avoiding service interruption caused by the failure of the relay link.
  • the embodiment of the present invention further provides a remote terminal, which may be smaller than the coverage, or may have no cell coverage, wherein the remote terminal includes the relay reselection apparatus described in Embodiment 5.
  • FIG. 16 is a schematic diagram showing the composition of a remote terminal according to an embodiment of the present invention.
  • the remote terminal 1600 can include a central processor 1601 and a memory 1602; the memory 1602 is coupled to the central processor 1601.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the functions of the relay reselection device may be integrated into the central processor 1601, and the function of the relay reselection feedback device described in Embodiment 5 is implemented by the central processor 1601, wherein the relay reselection The functions of the device are incorporated herein and will not be described again.
  • the relay reselection device may be configured separately from the central processing unit 1601.
  • the relay reselection device may be configured as a chip connected to the central processing unit 1601, and implemented by the control of the central processing unit 1601. Following the function of the reselection device.
  • the relay device 1600 may further include: a communication module 1603, an input unit 1604, an audio processing unit 1605, a display 1606, and a power source 1607. It should be noted that the remote terminal 1600 also does not have to include all of the components shown in FIG. 16; in addition, the user equipment 1600 may also include components not shown in FIG. 16, and reference may be made to the prior art.
  • central processor 160 also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls the remote terminal. The operation of the various components of the 1600.
  • the memory 1602 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
  • Various information can be stored, and a program for executing related information can be stored.
  • the central processor 1601 can execute the program stored by the memory 1602 to implement information storage or processing and the like.
  • the functions of other components are similar to those of the existing ones and will not be described here.
  • the various components of the remote terminal 1600 can be implemented by dedicated hardware, firmware, software, or a combination thereof without departing from the scope of the invention.
  • the relay reselection can be triggered according to the relay reselection indication information, thereby avoiding service interruption caused by the relay link failure.
  • An embodiment of the present invention provides a base station, where the base station includes the relay reselection apparatus as described in Embodiment 6.
  • FIG. 17 is a schematic diagram of a structure of a base station according to an embodiment of the present invention.
  • base station 1700 can include a central processing unit (CPU) 1701 and memory 1702; and memory 1702 coupled to central processor 1701.
  • the memory 1702 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 1701 to receive various information transmitted by the relay device or the remote terminal, and to the relay device. Or the remote terminal sends various information.
  • CPU central processing unit
  • memory 1702 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 1701 to receive various information transmitted by the relay device or the remote terminal, and to the relay device. Or the remote terminal sends various information.
  • the functionality of the relay reselection device can be integrated into the central processor 1701.
  • the relay reselection device may be configured separately from the central processing unit 1701.
  • the relay reselection device may be configured as a chip connected to the central processing unit 1701, and implemented by the control of the central processing unit 1701. Following the function of the reselection device.
  • the base station 1700 may further include: a transceiver 1703, an antenna 1704, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and are not described herein again. It should be noted that the base station 1700 also does not have to include all of the components shown in FIG. 17; in addition, the base station 1700 may also include components not shown in FIG. 17, and reference may be made to the prior art.
  • the base station in this embodiment can assist the relay device to trigger the remote terminal to perform relay reselection, and assist the remote terminal to reselect the relay, thereby avoiding service interruption caused by the relay link failure.
  • the embodiment of the present invention further provides a communication system, including the relay device as described in Embodiment 7, the remote terminal described in Embodiment 8, and the base station described in Embodiment 9.
  • FIG. 18 is a schematic diagram of a configuration of a communication system according to an embodiment of the present invention.
  • the communication system 1800 includes a relay device 801, a remote terminal 802, and a base station 803. among them,
  • the relay device 801 may have one or more, which is located in the coverage of the base station 803, and may be implemented by the relay device of Embodiment 7, and the content thereof is incorporated herein, and details are not described herein again.
  • the remote terminal 802 may have one or more, which may be located within the coverage of the base station 803, or may not be located within the coverage of the base station 803, and may be implemented by the remote terminal of Embodiment 8, the content of which is incorporated herein. I won't go into details here.
  • the base station 803 can be implemented by the base station of Embodiment 9, and the content thereof is incorporated herein, and details are not described herein again.
  • the remote terminal can reselect the appropriate relay in the case of a relay link failure, thereby avoiding service interruption caused by the relay link failure.
  • Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a relay reselection device or a relay device, the program causes a computer to be at the relay reselection device or a relay device The relay reselection method described in Embodiment 1 is performed.
  • Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the relay reselection described in Embodiment 1 in a relay reselection device or a relay device method.
  • Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a relay reselection device or a remote terminal, the program causes a computer to execute in the relay reselection device or remote terminal The relay reselection method described in Embodiment 2.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the relay reselection method described in Embodiment 2 in a relay reselection device or a remote terminal .
  • Embodiments of the present invention also provide a computer readable program, wherein the program causes a computer to execute an embodiment in the relay reselection device or base station when the program is executed in a relay reselection device or a base station
  • Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer The readable program causes the computer to perform the relay reselection method described in Embodiment 3 in the relay reselection device or base station.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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Abstract

本发明实施例提供一种中继重选方法、装置和系统。该方法包括：中继设备监测中继重选触发条件；所述中继设备判断中继重选触发条件是否满足；所述中继设备在中继重选触发条件满足时，向以所述中继设备为中继的远程终端发送中继重选指示信息，指示所述远程终端进行中继重选；其中，所述中继重选触发条件为所述中继设备的空口信道失步或者即将失步，或者接收到停止中继功能的通知，或者所述中继设备的电量不足。通过本发明实施例，可以减少由于中继链路不好造成的中断时间，避免出现长时间业务中断。

Description

中继选择或重选方法、装置和系统 技术领域
本发明涉及通信领域，特别涉及一种中继选择或重选方法、装置和系统。
背景技术
边链路(Sidelink)通信方式是指数据包无需通过核心网和基站，用户1和用户2之间直接建立通信链路，进行通信。在进行边链路通信前，一般会进行发现过程。比如，用户2要通过边链路通信方式发信息给用户1之前，先要发现用户1是否在附近。图1所示为两个用户都在基站覆盖下的发现或建立边链路通信的示意图。图2所示为一个用户在基站覆盖下，另一个用户不在基站覆盖下的发现或建立边链路通信的示意图。图3所示为两个用户都不在基站覆盖下的发现或建立边链路通信的示意图。
边链路通信方式可用于扩大小区覆盖范围。如图1所示，UE2位于小区边缘，信号比较弱，很可能即将离开该小区覆盖，另外，附近有被网络授权的具有中继功能的终端，简称为中继，例如UE1，为了避免业务中断，UE2发现中继UE1后，可以通过该中继UE1接入基站，进行正常的业务通信。如图2所示，UE2位于没有网络覆盖区域，并且，附近有被网络授权的具有中继功能的终端，例如UE1，为了接入网络进行通信，UE2发现位于小区覆盖内的中继UE1后，可以通过该中继UE1接入基站，进行正常的业务通信。
应该注意，上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
在上述场景描述中，UE2称为远程终端(remote UE)，该终端可能位于小区覆盖之内，也可能位于小区覆盖之外。具有中继功能的终端，比如UE1，称为终端-网络间中继(UE-Network relay)，在本申请中简称为中继。
当远程终端通过中继接入基站进行通信时，位于小区覆盖内的中继有可能会发生无线链路失败(RLF，Radio Link Failure)。一旦中继发生无线链路失败，需要其进行 中继的远程终端都将会出现业务中断，直到选择到另一个合适的中继。
为了尽量减少由于中继链路不好造成的中断时间，避免出现长时间业务中断，本发明实施例提供了一种中继选择或重选方法、装置和系统。
根据本发明实施例的第一方面，提供了一种中继重选装置，应用于中继设备，其中，所述装置包括：
监测单元，其监测通知远程终端进行中继重选的触发条件；
判断单元，其判断通知远程终端进行中继重选的触发条件是否满足；
发送单元，其在中继通知远程终端进行中继重选的触发条件满足时，向以所述中继设备为中继的远程终端发送中继重选指示信息，触发所述远程终端进行中继重选；
其中，所述通知远程终端进行中继重选的触发条件为T310计时器启动或T310计时器正在运行或T310计时器过期，或者接收到停止中继功能的通知，或者所述中继设备的电量不足。
根据本发明实施例的第二方面，提供了一种中继重选装置，应用于远程终端，其中，所述装置包括：
接收单元，其接收中继重选指示信息；
选择单元，其在所述接收单元接收到所述中继重选指示信息后触发中继重选。
根据本发明实施例的第三方面，提供了一种中继重选装置，应用于基站，其中，所述装置包括：
接收单元，其接收远程终端发送的所述远程终端与各中继设备之间的边链路信道的信道测量结果和各中继设备的中继标识；
选择单元，其根据所述信道测量结果和所述中继标识为所述远程终端选择中继设备；
发送单元，其将选择的中继设备通知给所述远程终端；
其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
根据本发明实施例的第四方面，提供了一种中继重选方法，应用于中继设备，其中，所述方法包括：
监测通知远程终端进行中继重选的触发条件；
判断通知远程终端进行中继重选的触发条件是否满足；
在中继通知远程终端进行中继重选的触发条件满足时，向以所述中继设备为中继的远程终端发送中继重选指示信息，触发所述远程终端进行中继重选；
其中，所述通知远程终端进行中继重选的触发条件为T310计时器启动或T310计时器正在运行或T310计时器过期，或者接收到停止中继功能的通知，或者所述中继设备的电量不足。
根据本发明实施例的第五方面，提供了一种中继重选方法，应用于远程终端，其中，所述方法包括：
接收中继重选指示信息；
在接收到所述中继重选指示信息后触发中继重选。
根据本发明实施例的第六方面，提供了一种中继重选方法，应用于基站，其中，所述方法包括：
接收远程终端发送的所述远程终端与各中继设备之间的边链路信道的信道测量结果和各中继设备的中继标识；
根据所述信道测量结果和所述中继标识为所述远程终端选择中继设备；
将选择的中继设备通知给所述远程终端；
其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
根据本发明实施例的第七方面，提供了一种中继设备，其中，所述中继设备包括前述第一方面所述的装置。
根据本发明实施例的第八方面，提供了一种远程终端，其中，所述远程终端包括前述第二方面所述的装置。
根据本发明实施例的第九方面，提供了一种基站，其中，所述基站包括前述第三方面所述的装置。
根据本发明实施例的第十方面，提供了一种通信系统，其中，所述通信系统包括前述第七方面所述的中继设备，前述第八方面所述的远程终端，以及前述第九方面所述的基站。
本发明实施例的有益效果在于：通过本发明实施例，可以减少由于中继链路不好造成的中断时间，避免出现长时间业务中断。
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原 理可以被采用的方式。应该理解，本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
所包括的附图用来提供对本发明实施例的进一步的理解，其构成了说明书的一部分，用于例示本发明的实施方式，并与文字描述一起来阐释本发明的原理。显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是发现或建立边链路的一个场景的示意图；
图2是发现或建立边链路的另一个场景的示意图；
图3是发现或建立边链路的再一个场景的示意图；
图4是实施例1的中继重选方法的流程图；
图5是实施例2的中继重选方法的流程图；
图6是远程终端进行中继重选的一个实施方式的流程图；
图7是远程终端进行中继重选的另一个实施方式的流程图；
图8是实施例3的中继重选方法的流程图；
图9是本实施例的中继重选方法的信息交互示意图；
图10是实施例4的中继重选装置的组成示意图；
图11是实施例5的中继重选装置的组成示意图；
图12是图11的中继重选装置的选择单元的一个实施方式的组成示意图；
图13是图11的中继重选装置的选择单元的另一个实施方式的组成示意图；
图14是实施例6的中继重选装置的组成示意图；
图15是实施例7的中继设备的组成示意图；
图16是实施例8的远程终端的组成示意图；
图17是实施例9的基站的组成示意图；
图18是实施例10的通信系统的拓扑结构示意图。
具体实施方式
参照附图，通过下面的说明书，本发明的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本发明的特定实施方式，其表明了其中可以采用本发明的原则的部分实施方式，应了解的是，本发明不限于所描述的实施方式，相反，本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。下面结合附图对本发明的各种实施方式进行说明。这些实施方式只是示例性的，不是对本发明的限制。
实施例1
本发明实施例提供了一种中继重选方法，该方法可以应用于中继设备，例如小区覆盖内的终端设备，其中，通过发现机制，该终端设备被某个远程终端选为中继，作为该远程终端的中继设备发挥作用。图4是该方法的流程图，请参照图4，该方法包括：
步骤401：所述中继设备监测通知远程终端进行中继重选的触发条件；
步骤402：所述中继设备判断通知远程终端进行中继重选的触发条件是否满足，如果满足则执行步骤403，否则回到步骤401；
步骤403：所述中继设备向以所述中继设备为中继的远程终端发送中继重选指示信息，触发所述远程终端进行中继重选。
在本实施例的一个实施方式中，通知远程终端进行中继重选的触发条件可以是所述中继设备的空口信道失步或者即将失步，在本实施方式中，当该中继设备检测到主小区(PCell)的物理层出现问题时，例如，该中继设备接收到N310(由网络配置的阈值)次连续失步指示，则启动T310计时器，而该T310计时器运行一段时间后，将会过期，因此，如果T310计时器启动、T310计时器正在运行、或T310计时器过期，则说明该中继设备的空口信道失步或者即将失步，从而可能导致以其作为中继的远程终端出现业务中断。因此，在本实施方式中，该中继设备一旦监测到T310计时器启动、或者T310计时器正在运行、或者T310计时器过期，也即通知远程终端进行中继重选的触发条件满足，则向以该中继设备作为中继的远程终端发送中继重选指示信息，以触发该远程终端进行中继重选。该中继重选指示信息可以是包含中继空口 暂时中断的发现信息。
在本实施例的另一个实施方式中，通知远程终端进行中继重选的触发条件可以是该中继设备接收到停止中继功能的通知。在本实施方式中，网络侧，例如eNB，可能通知中继设备停止中继功能，则本实施例的中继设备一旦接收到网络侧的该通知，则认为通知远程终端进行中继重选的触发条件满足，则向以该中继设备作为中继的远程终端发送中继重选指示信息，以触发该远程终端进行中继重选。该中继重选指示信息可以是包含中继功能暂时停止指示信息的发现信息。
在本实施例的又一个实施方式中，通知远程终端进行中继重选的触发条件可以是该中继设备的电量不足，电量不足可能导致关机，由此可能导致以其作为中继的远程终端出现业务中断。因此，在本实施方式中，该中继设备还可以监测自己的电池电量，一旦发现电池电量不足，则认为满足通知远程终端进行中继重选的触发条件，则向以该中继设备作为中继的远程终端发送中继重选指示信息，以触发该远程终端进行中继重选。该中继重选指示信息可以是包含电量不足指示信息的发现信息。
以上实施方式中的通知远程终端进行中继重选的触发条件只是举例说明，本实施例并不以此作为限制。
通过本实施例的方法，中继设备在通知远程终端进行中继重选的触发条件满足时，触发远程终端进行中继重选，避免了因中继设备发生链路失败而导致的远程终端的业务中断。
在本实施例的一个实施方式中，上述中继重选指示信息可以由上述中继设备通过边链路传输发送给所述远程终端。在该实施方式中，该中继重选指示信息可以包括：所述中继设备的中继标识，以及空口连接暂时中断和/或服务小区停止中继功能和/或中继设备的电量不足等。其中，该中继设备的中继标识用于告知该远程终端不能再以该中继设备作为中继，该中继设备的中继标识可以包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)等。其中，空口连接暂时中断和/或服务小区停止中继功能和/或中继设备的电量不足等用于告知该远程终端故障原因。
在本实施例的另一个实施方式中，上述中继重选指示信息可以由上述中继设备通过空口发送给基站，由基站转发给上述远程终端。在该实施方式中，该中继重选指示信息可以包括：所述远程终端的终端标识，以及空口连接即将中断和/或中继设备的 电量不足等。其中，该远程终端的终端标识用于告知该基站以上述中继设备作为中继的远程终端，该远程终端的终端标识可以包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)等。其中，该空口连接即将中断和/或中继设备的电量不足用于告知该基站故障原因。在该实施方式中，可选的，该中继重选指示信息还可以包括上述中继设备的中继标识，以告知该基站哪个中继设备不能再作为上述远程终端的中继，其中，在基站分配给该中继设备的传输资源确定的情况下，也可以不包含该中继设备的中继标识，根据接收上述信息的位置，该基站可以确定该中继设备。在该实施方式中，基站接收到该中继重选指示信息以后，即可将该信息通知给该远程终端，以触发该远程终端进行中继重选。其中，将该信息通知给该远程终端也是可选的，该基站可以通过其它方式触发该远程终端进行中继重选。
在本实施例中，为了进行中继发现，该中继设备还可以接收远程终端通过边链路传输广播的该远程终端的终端标识，并通过边链路传输向该远程终端发送自己的中继标识；或者，该中继设备主动通过边链路传输广播自己的中继标识，以便接收到该中继标识的远程终端以该中继设备作为自己中继的备选。其中，关于中继设备的中继标识，以及远程终端的终端标识，已经在前面做了说明，此处不再赘述。
通过本实施例的方法，避免了因中继设备发生链路失败而导致的远程终端的业务中断。
实施例2
本发明实施例提供了一种中继重选方法，该方法应用于远程终端，是对应实施例1的方法的远程终端侧的处理，其中，与实施例1相同的内容不再重复说明。该远程终端可以位于小区覆盖内，也可以没有小区覆盖，其可以通过边链路传输发现中继。图5是该方法的流程图，请参照图5，该方法包括：
步骤501：所述远程终端接收中继重选指示信息；
步骤502：所述远程终端在接收到所述中继重选指示信息后触发中继重选。
在步骤501中，该远程终端可以接收中继设备通过边链路传输发送的中继重选指示信息，该中继重选指示信息可以包含在中继设备发送的发现信息中；该远程终端也可以接收基站通过空口(专用信令)发送的中继重选指示信息，具体如前所述，其内 容被合并于此，在此不再赘述。一旦接收到上述中继重选指示信息，则触发该远程终端进行中继重选。
在步骤502的一个实施方式中，对于没有小区覆盖的远程终端，或者对于位于小区覆盖内的远程终端，可以通过图6的方法进行中继重选，请参照图6，该方法包括：
步骤601：通过边链路传输发现中继设备；
步骤602：测量所述远程终端与各中继设备之间的边链路信道；
步骤603：根据所述边链路信道的信道质量和电池余量选择一个中继设备。
在步骤601中，发现中继设备可以通过常规的发现机制实现，也可以通过本实施例的发现机制实现，以下对本实施例的发现机制进行说明。
在一个实施方式中，如前所述，各中继设备通过边链路传输广播自己的中继标识，则本实施例的远程终端接收各中继设备通过边链路传输广播的各中继设备的中继标识，由此发现各个中继设备。
在另一个实施方式中，如前所述，该远程终端通过边链路传输广播自己的终端标识，接收各中继设备通过边链路传输发送的各中继设备的中继标识，由此发现各中继设备。
其中，中继设备的中继标识和远程终端的终端标识已经在实施例1中做了详细说明，此处不再赘述。在本实施例中，该中继设备的中继标识和该远程终端的终端标识可以通过常规的发现信息来发送，除了上述标识以外，本实施例并不对该发现信息所包含的其它内容做限定，例如，该发现信息还可以包含PLMN ID(Public Land Mobile Network ID，公共陆地移动网络标识)、APN(Access Point Name，接入点名称)信息等。
在步骤602中，该远程终端测量其与各中继设备之间的边链路信道的信道质量，具体的测量方法不做限制。
在步骤603中，该远程终端可以根据测量出的各个边链路信道的信道质量以及自己的电池余量选择一个合适的中继设备作为自己的中继。
在步骤502的另一个实施方式中，对于位于小区覆盖内的远程终端，还可以通过图7的方法进行中继重选，请参照图7，该方法包括：
步骤701：通过边链路传输发现中继设备；
步骤702：测量所述远程终端与各中继设备之间的边链路信道；
步骤703：将测量结果和各中继设备的中继标识发送给基站；
步骤704：接收所述基站发送的中继设备指示信息；
步骤705：根据所述中继设备指示信息确定基站为所述远程终端选择的中继设备。
在步骤701-702与图6所示实施方式的步骤601-602相同，其内容被合并于此，此处不再赘述。
在步骤703中，该远程终端将测量结果和各中继设备的中继标识发送给基站，由该基站为其选择合适的中继。其中，关于中继设备的中继标识如前所述。
在步骤704中，该远程终端可以接收基站返回的中继设备指示信息，该基站可以通过专用信令将该信息发送给该远程终端。
在步骤705中，该远程终端根据接收到的基站返回的指示信息可以确定该基站为其选择的中继设备。
在本实施例中，通过图6和图7描述了远程终端进行中继重选的过程，在具体实施过程中，该远程终端可以通过图6和图7的方法进行中继选择，具体实施过程如前所述，此次不再赘述。
在本实施例中，远程终端成功选到一个新的中继以后，该远程终端可以向选中的中继发送建立连接请求，以与该中继建立连接。而后，该远程终端在成功接入新的中继后，可以释放与旧中继的链接。
通过本实施例的方法，在远程终端的中继设备无法继续作为其中继使用时，该远程终端可以重新选择到一个合适的中继，避免了因原中继链路故障而导致了业务中断。
实施例3
本发明实施例提供了一种中继重选方法，该方法应用于基站，是对应实施例1和实施例2的方法的基站侧的处理，其中，与实施例1和实施例2相同的内容不再重复说明。图8是该方法的流程图，请参照图8，该方法包括：
步骤801：接收远程终端发送的所述远程终端与各中继设备之间的边链路信道的信道测量结果和各中继设备的中继标识；
步骤802：根据所述信道测量结果和所述中继标识为所述远程终端选择中继设 备；
步骤803：将选择的中继设备通知给所述远程终端。
在本实施例中，该基站在接收到远程终端发送的上述信道测量结果以及各中继设备的中继标识后，据此为该远程终端选择合适的中继设备，并告知该远程终端，由此帮助远程终端完成了中继重选，避免了因原中继链路故障导致的业务中断。
在步骤801中，远程终端可以通过之前的中继发送上述信道测量结果和中继标识。
在步骤802中，基站可以根据该远程终端与各中继设备之间的边链路的信道测量结果为该远程终端选择合适的中继设备，具体的选择策略不做限制。
在步骤803中，可选的，该基站可以通过专用信令通知上述远程终端为其选择的中继设备，但本实施例并不以此作为限制。
在本实施例中，如前所述，该基站还可能协助中继设备指示远程终端进行中继重选，则该基站还可以接收中继设备发送的中继重选指示信息，所述中继重选指示信息包括：空口连接暂时中断和/或中继设备的电量不足，以及远程终端的终端标识；将所述中继重选指示信息发送给所述远程终端，指示所述远程终端进行中继重选。其中，该中继重选指示信息还可以包括上述中继设备的中继标识，以便基站识别该中继设备。并且，该中继重选指示信息可以由该基站通过专用信令发送给该远程终端。
在本实施例中，如前所述，该基站还可以指示中继设备停止中继功能，则该基站还可以向中继设备发送停止中继功能的指示信息，以指示该中继设备停止中继功能。其中，该基站可以通过RRC信令发送上述信息，也可以通过其它信令发送所述信息。
在本实施例中，中继设备的中继标识和远程终端的终端标识已经在实施例1中做了详细说明，此处不再赘述。
通过本实施例的方法，基站可以协助中继设备指示远程终端进行中继重选，并协助远程终端重选中继，避免了因中继链路故障导致的业务中断。
图9是本实施例的中继重选方法的信息交互示意图，从图9可以看出基站、中继设备、以及远程终端各自的处理过程。
实施例4
本发明实施例提供了一种中继重选装置，该装置应用于中继设备，例如小区覆盖内的终端设备，其被某一个远程终端选定为中继，由于该装置解决问题的原理与实施例1的方法类似，因此其具体的实施可以参照实施例1的方法的实施，内容相同之处不再重复说明。
图10是该中继重选装置的组成示意图，请参照图10，该装置1000包括：监测单元1001、判断单元1002以及发送单元1003，其中：
监测单元1001用于监测通知远程终端进行中继重选的触发条件；
判断单元1002用于判断通知远程终端进行中继重选的触发条件是否满足；
发送单元1003用于在中继通知远程终端进行中继重选的触发条件满足时，向以所述中继设备为中继的远程终端发送中继重选指示信息，触发所述远程终端进行中继重选；
其中，所述中继重选触发条件为所述中继设备的空口信道失步或者即将失步，或者接收到停止中继功能的通知，或者所述中继设备的电量不足。
在一个实施方式中，发送单元1003可以通过边链路传输向所述远程终端发送所述中继重选指示信息，触发所述远程终端进行中继重选。其中，所述中继重选指示信息包括：所述中继设备的中继标识，以及空口连接暂时中断和/或服务小区停止中继功能和/或中继设备的电量不足。其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
在一个实施方式中，发送单元1003可以通过空口向基站发送所述中继重选指示信息，指示所述基站通知所述远程终端进行中继重选。其中，所述中继重选指示信息包括：所述远程终端的终端标识，以及空口连接即将中断和/或中继设备的电量不足。其中，所述远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。可选的，所述中继重选指示信息还包括：所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
在一个实施方式中，该装置还可以包括：
接收单元1004，其接收远程终端通过边链路传输广播的所述远程终端的终端标 识。其中，所述远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。在该实施方式中，发送单元1003还用于通过边链路传输向所述远程终端发送所述中继设备的中继标识，以便远程终端能够发现该中继设备。其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)；
在一个实施方式中，该发送单元1003还用于通过边链路传输广播所述中继设备的中继标识，以便远程终端能够发现该中继设备。其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
通过本实施例的装置，中继设备可以通过发送中继重选指示信息触发远程终端进行中继重选，避免了中继链路故障导致的业务中断。
实施例5
本发明实施例提供了一种中继重选装置，该装置应用于远程终端，该远程终端可以位于小区覆盖内，也可以没有小区覆盖，由于该装置解决问题的原理与实施例2的方法类似，因此其具体的实施可以参照实施例2的方法的实施，内容相同之处不再重复说明。
图11是该中继重选装置的组成示意图，请参照图11，该装置1100包括：接收单元1101和选择单元1102，其中：
接收单元1101用于接收中继重选指示信息；
选择单元1102用于在接收单元1101接收到上述中继重选指示信息后触发中继重选。
在一个实施方式中，该接收单元1101可以接收中继设备通过边链路传输发送的中继重选指示信息，该中继重选指示信息可以包含在发现信息中传输。其中，所述中继重选指示信息包括：所述中继设备的中继标识，以及空口连接暂时中断和/或服务小区停止中继功能和/或中继设备的电量不足。其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
在另一个实施方式中，该接收单元1101可以接收基站通过空口发送的中继重选指示信息，该中继重选指示信息可以通过专用信令传输。其中，所述中继重选指示信息包括：所述远程终端的终端标识，以及空口连接即将中断和/或中继设备的电量不足。其中，所述远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。可选的，该中继重选指示信息还可以包括：所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
在一个实施方式中，如图12所示，该选择单元1102可以包括：第一发现模块1201、第一测量模块1202、第一选择模块1203。其中，该第一发现模块1201用于通过边链路传输发现中继设备；该第一测量模块1202用于测量所述远程终端与各中继设备之间的边链路信道；该第一选择模块1203用于根据所述边链路信道的信道质量和电池余量选择一个中继设备。
其中，该第一发现模块1201可以通过接收中继设备通过边链路传输广播的所述中继设备的中继标识，来发现所述中继设备。其中，该中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
其中，该第一发现模块1202也可以通过边链路传输广播所述远程终端的终端标识，接收中继设备通过边链路传输发送的所述中继设备的中继标识，以发现所述中继设备。其中，所述远程终端的终端标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe UE ID)。其中，所述中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
在另一个实施方式中，如图13所示，该选择单元1102可以包括：第二发现模块1301、第二测量模块1302、发送模块1303、接收模块1304、以及确定模块1305。其中，该第二发现模块1301用于通过边链路传输发现中继设备；该第二测量模块1302用于测量所述远程终端与各中继设备之间的边链路信道；该发送模块1303将测量结果和各中继设备的中继标识发送给基站；该接收模块1304用于接收所述基站发送的中继设备指示信息；该确定模块用于根据所述中继设备指示信息确定基站为所述远程 终端选择的中继设备。
其中，该第二发现模块1301可以通过接收中继设备通过边链路传输广播的所述中继设备的中继标识，来发现所述中继设备。其中，该中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
其中，该第二发现模块1302也可以通过边链路传输广播所述远程终端的终端标识，接收中继设备通过边链路传输发送的所述中继设备的中继标识，以发现所述中继设备。其中，所述远程终端的终端标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe UE ID)。其中，所述中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
通过本实施例的装置，远程终端可以根据中继重选指示信息触发中继重选，避免了因中继链路故障导致的业务中断。
实施例6
本发明实施例提供了一种中继重选装置，该装置应用于基站，由于该装置解决问题的原理与实施例3的方法类似，因此其具体的实施可以参照实施例3的方法的实施，内容相同之处不再重复说明。
图14是该中继重选装置的组成示意图，请参照图14，该装置1400包括：接收单元1401、选择单元1402和发送单元1403，其中：
接收单元1401用于接收远程终端发送的所述远程终端与各中继设备之间的边链路信道的信道测量结果和各中继设备的中继标识；
选择单元1402用于根据所述信道测量结果和所述中继标识为所述远程终端选择中继设备；
发送单元1403用于将选择的中继设备通知给所述远程终端。
其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
在本实施例的一个实施方式中，接收单元1401还用于接收中继设备发送的中继重选指示信息，所述中继重选指示信息包括：空口连接即将中断和/或中继设备的电 量不足，以及远程终端的终端标识。发送单元1403还用于将所述中继重选指示信息发送给所述远程终端，触发所述远程终端进行中继重选。其中，该远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。可选的，该中继重选指示信息还包括：所述中继设备的中继标识。
在本实施例的一个实施方式中，发送单元1403还用于向中继设备发送停止中继功能指示信息，以指示所述中继设备停止中继功能。
通过本实施例的装置，基站可以协助中继设备触发远程终端进行中继重选，并协助远程终端重选中继，避免了因中继链路故障导致的业务中断。
实施例7
本发明实施例还提供了一种中继设备，该中继设备可以是小区覆盖内的终端设备(UE)，其中，该中继设备包括实施例4所述的中继重选装置。
图15是本发明实施例的中继设备的组成示意图。如图15所示，该中继设备1500可以包括中央处理器1501和存储器1502；存储器1502耦合到中央处理器1501。值得注意的是，该图是示例性的；还可以使用其它类型的结构，来补充或代替该结构，以实现电信功能或其它功能。
在一个实施方式中，中继重选装置的功能可以被集成到中央处理器1501中，由中央处理器1501实现实施例4所述的中继重选反馈装置的功能，其中关于中继重选装置的功能被合并于此，在此不再赘述。
在另一个实施方式中，中继重选装置可以与中央处理器1501分开配置，例如可以将中继重选装置配置为与中央处理器1501连接的芯片，通过中央处理器1501的控制来实现中继重选装置的功能。
如图15所示，该中继设备1500还可以包括：通信模块1503、输入单元1504、音频处理单元1505、显示器1506、电源1507。值得注意的是，中继设备1500也并不是必须要包括图15中所示的所有部件；此外，中继设备1500还可以包括图15中没有示出的部件，可以参考现有技术。
如图15所示，中央处理器1501有时也称为控制器或操作控件，可以包括微处理器或其它处理器装置和/或逻辑装置，该中央处理器1501接收输入并控制中继设备 1500的各个部件的操作。
其中，存储器1502，例如可以是缓存器、闪存、硬驱、可移动介质、易失性存储器、非易失性存储器或其它合适装置中的一种或更多种。可储存各种信息，此外还可存储执行有关信息的程序。并且中央处理器1501可执行该存储器1502存储的该程序，以实现信息存储或处理等。其它部件的功能与现有类似，此处不再赘述。用中继设备1500的各部件可以通过专用硬件、固件、软件或其结合来实现，而不偏离本发明的范围。
通过本实施例的中继设备，可以触发远程终端进行中继重选，避免了因中继链路故障导致的业务中断。
实施例8
本发明实施例还提供了一种远程终端，该远程终端可以为小于覆盖内，也可以没有小区覆盖，其中，该远程终端包括实施例5所述的中继重选装置。
图16是本发明实施例的远程终端的组成示意图。如图16所示，该远程终端1600可以包括中央处理器1601和存储器1602；存储器1602耦合到中央处理器1601。值得注意的是，该图是示例性的；还可以使用其它类型的结构，来补充或代替该结构，以实现电信功能或其它功能。
在一个实施方式中，中继重选装置的功能可以被集成到中央处理器1601中，由中央处理器1601实现实施例5所述的中继重选反馈装置的功能，其中关于中继重选装置的功能被合并于此，在此不再赘述。
在另一个实施方式中，中继重选装置可以与中央处理器1601分开配置，例如可以将中继重选装置配置为与中央处理器1601连接的芯片，通过中央处理器1601的控制来实现中继重选装置的功能。
如图16所示，该中继设备1600还可以包括：通信模块1603、输入单元1604、音频处理单元1605、显示器1606、电源1607。值得注意的是，远程终端1600也并不是必须要包括图16中所示的所有部件；此外，用户设备1600还可以包括图16中没有示出的部件，可以参考现有技术。
如图16所示，中央处理器1601有时也称为控制器或操作控件，可以包括微处理器或其它处理器装置和/或逻辑装置，该中央处理器1601接收输入并控制远程终端 1600的各个部件的操作。
其中，存储器1602，例如可以是缓存器、闪存、硬驱、可移动介质、易失性存储器、非易失性存储器或其它合适装置中的一种或更多种。可储存各种信息，此外还可存储执行有关信息的程序。并且中央处理器1601可执行该存储器1602存储的该程序，以实现信息存储或处理等。其它部件的功能与现有类似，此处不再赘述。用远程终端1600的各部件可以通过专用硬件、固件、软件或其结合来实现，而不偏离本发明的范围。
通过本实施例的远程终端，可以根据中继重选指示信息触发中继重选，避免了因中继链路故障导致的业务中断。
实施例9
本发明实施例提供一种基站，该基站包括如实施例6所述的中继重选装置。
图17是本发明实施例的基站的一构成示意图。如图17所示，基站1700可以包括：中央处理器(CPU)1701和存储器1702；存储器1702耦合到中央处理器1701。其中该存储器1702可存储各种数据；此外还存储信息处理的程序，并且在中央处理器1701的控制下执行该程序，以接收中继设备或远程终端发送的各种信息、并且向中继设备或远程终端发送各种信息。
在一个实施方式中，中继重选装置的功能可以被集成到中央处理器1701中。
在另一个实施方式中，中继重选装置可以与中央处理器1701分开配置，例如可以将中继重选装置配置为与中央处理器1701连接的芯片，通过中央处理器1701的控制来实现中继重选装置的功能。
此外，如图17所示，基站1700还可以包括：收发机1703和天线1704等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，基站1700也并不是必须要包括图17中所示的所有部件；此外，基站1700还可以包括图17中没有示出的部件，可以参考现有技术。
通过本实施例的基站，可以协助中继设备触发远程终端进行中继重选，并协助远程终端重选中继，避免了因中继链路故障导致的业务中断。
实施例10
本发明实施例还提供一种通信系统，包括如实施例7所述的中继设备、实施例8所述的远程终端，以及实施例9所述的基站。
图18是本发明实施例的通信系统的一构成示意图，如图18所示，该通信系统1800包括：中继设备801、远程终端802以及基站803。其中，
中继设备801可以有一个或一个以上，其位于基站803的覆盖范围内，可以通过实施例7的中继设备来实现，其内容被合并于此，在此不再赘述。
远程终端802可以有一个或一个以上，其可以位于基站803的覆盖范围内，也可以不位于基站803的覆盖范围内，可以通过实施例8的远程终端来实现，其内容被合并于此，此处不再赘述。
基站803可以通过实施例9的基站来实现，其内容被合并于此，此处不再赘述。
通过本实施例的通信系统，远程终端可以在中继链路故障的情况下重新选择合适的中继，避免了因中继链路故障导致的业务中断。
本发明实施例还提供了一种计算机可读程序，其中当在中继重选装置或中继设备中执行所述程序时，所述程序使得计算机在所述中继重选装置或中继设备中执行实施例1所述的中继重选方法。
本发明实施例还提供了一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在中继重选装置或中继设备中执行实施例1所述的中继重选方法。
本发明实施例还提供了一种计算机可读程序，其中当在中继重选装置或远程终端中执行所述程序时，所述程序使得计算机在所述中继重选装置或远程终端中执行实施例2所述的中继重选方法。
本发明实施例还提供了一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在中继重选装置或远程终端中执行实施例2所述的中继重选方法。
本发明实施例还提供了一种计算机可读程序，其中当在中继重选装置或基站中执行所述程序时，所述程序使得计算机在所述中继重选装置或基站中执行实施例3所述的中继重选方法。
本发明实施例还提供了一种存储有计算机可读程序的存储介质，其中所述计算机 可读程序使得计算机在中继重选装置或基站中执行实施例3所述的中继重选方法。
本发明以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。逻辑部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
以上结合具体的实施方式对本发明进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的精神和原理对本发明做出各种变型和修改，这些变型和修改也在本发明的范围内。

Claims (20)

  1. 一种中继重选装置，应用于中继设备，其中，所述装置包括：
    监测单元，其监测通知远程终端进行中继重选的触发条件；
    判断单元，其判断通知远程终端进行中继重选的触发条件是否满足；
    发送单元，其在中继通知远程终端进行中继重选的触发条件满足时，向以所述中继设备为中继的远程终端发送中继重选指示信息，触发所述远程终端进行中继重选；
    其中，所述通知远程终端进行中继重选的触发条件为T310计时器启动或T310计时器正在运行或T310计时器过期，或者接收到停止中继功能的通知，或者所述中继设备的电量不足。
  2. 根据权利要求1所述的装置，其中，所述发送单元通过边链路传输向所述远程终端发送所述中继重选指示信息，指示所述远程终端进行中继重选；
    其中，所述中继重选指示信息包括：所述中继设备的中继标识，以及空口连接暂时中断和/或服务小区停止中继功能和/或中继设备的电量不足；
    其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  3. 根据权利要求1所述的装置，其中，所述发送单元通过空口向基站发送所述中继重选指示信息，指示所述基站通知所述远程终端进行中继重选；
    其中，所述中继重选指示信息包括：所述远程终端的终端标识，以及空口连接即将中断和/或中继设备的电量不足；
    其中，所述远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。
  4. 根据权利要求3所述的装置，其中，所述中继重选指示信息还包括：所述中继设备的中继标识，包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  5. 根据权利要求1所述的装置，其中，所述装置还包括：
    接收单元，其接收远程终端通过边链路传输广播的所述远程终端的终端标识；
    所述发送单元还用于通过边链路传输向所述远程终端发送所述中继设备的中继标识；
    其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)；
    其中，所述远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。
  6. 根据权利要求1所述的装置，其中，所述发送单元还用于通过边链路传输广播所述中继设备的中继标识；
    其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  7. 一种中继重选装置，应用于远程终端，其中，所述装置包括：
    接收单元，其接收中继重选指示信息；
    选择单元，其在所述接收单元接收到所述中继重选指示信息后触发中继重选。
  8. 根据权利要求7所述的装置，其中，所述接收单元接收中继设备通过边链路传输发送的中继重选指示信息；
    其中，所述中继重选指示信息包括：所述中继设备的中继标识，以及空口连接暂时中断和/或服务小区停止中继功能和/或中继设备的电量不足；
    其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  9. 根据权利要求7所述的装置，其中，所述接收单元接收基站通过空口发送的中继重选指示信息；
    其中，所述中继重选指示信息包括：所述远程终端的终端标识，以及空口连接即将中断和/或中继设备的电量不足；
    其中，所述远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。
  10. 根据权利要求9所述的装置，其中，所述中继重选指示信息还包括：所述中继设备的中继标识，包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  11. 根据权利要求7所述的装置，其中，所述选择单元包括：
    第一发现模块，其通过边链路传输发现中继设备；
    第一测量模块，其测量所述远程终端与各中继设备之间的边链路信道；
    第一选择模块，其根据所述边链路信道的信道质量和电池余量选择一个中继设备。
  12. 根据权利要求11所述的装置，其中，所述第一发现模块接收中继设备通过边链路传输广播的所述中继设备的中继标识，以发现所述中继设备；
    其中，所述中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  13. 根据权利要求11所述的装置，其中，所述第一发现模块通过边链路传输广播所述远程终端的终端标识，接收中继设备通过边链路传输发送的所述中继设备的中继标识，以发现所述中继设备；
    其中，所述远程终端的终端标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe UE ID)；
    其中，所述中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  14. 根据权利要求7所述的装置，其中，所述选择单元包括：
    第二发现模块，其通过边链路传输发现中继设备；
    第二测量模块，其测量所述远程终端与各中继设备之间的边链路信道；
    发送模块，其将测量结果和各中继设备的中继标识发送给基站；
    接收模块，其接收所述基站发送的中继设备指示信息；
    确定模块，其根据所述中继设备指示信息确定基站为所述远程终端选择的中继设备。
  15. 根据权利要求14所述的装置，其中，所述第二发现模块接收中继设备通过边链路传输广播的所述中继设备的中继标识，以发现所述中继设备；
    其中，所述中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  16. 根据权利要求14所述的方法，其中，所述第二发现模块通过边链路传输广播所述远程终端的终端标识，接收中继设备通过边链路传输发送的所述中继设备的中继标识，以发现所述中继设备；
    其中，所述远程终端的终端标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe UE ID)；
    其中，所述中继设备的中继标识为：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  17. 一种中继重选装置，应用于基站，其中，所述装置包括：
    接收单元，其接收远程终端发送的所述远程终端与各中继设备之间的边链路信道的信道测量结果和各中继设备的中继标识；
    选择单元，其根据所述信道测量结果和所述中继标识为所述远程终端选择中继设备；
    发送单元，其将选择的中继设备通知给所述远程终端；
    其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  18. 根据权利要求17所述的装置，其中，
    所述接收单元还用于接收中继设备发送的中继重选指示信息，所述中继重选指示信息包括：空口连接即将中断和/或中继设备的电量不足，远程终端的终端标识；
    所述发送单元还用于将所述中继重选指示信息发送给所述远程终端，指示所述远程终端进行中继重选；
    其中，所述远程终端的终端标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的终端标识(ProSe relay UE ID)。
  19. 根据权利要求18所述的装置，其中，所述中继重选指示信息还包括：所述中继设备的中继标识；
    其中，所述中继设备的中继标识包括：小区无线网络临时标识(C-RNTI)、边链路无线网络临时标识(SL-RNTI)，或者针对边链路的中继标识(ProSe relay UE ID)。
  20. 根据权利要求17所述的装置，其中，
    所述发送单元还用于向中继设备发送停止中继功能指示信息，以指示所述中继设备停止中继功能。
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