WO2020211014A1 - 终端以及由终端执行的方法 - Google Patents

终端以及由终端执行的方法 Download PDF

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Publication number
WO2020211014A1
WO2020211014A1 PCT/CN2019/083059 CN2019083059W WO2020211014A1 WO 2020211014 A1 WO2020211014 A1 WO 2020211014A1 CN 2019083059 W CN2019083059 W CN 2019083059W WO 2020211014 A1 WO2020211014 A1 WO 2020211014A1
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WIPO (PCT)
Prior art keywords
terminal
side link
information
status message
link status
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/083059
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English (en)
French (fr)
Inventor
王妍茹
王欢
侯晓林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
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NTT Docomo Inc
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 NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to US17/603,503 priority Critical patent/US20220150923A1/en
Priority to CN201980095381.7A priority patent/CN113692727A/zh
Priority to PCT/CN2019/083059 priority patent/WO2020211014A1/zh
Publication of WO2020211014A1 publication Critical patent/WO2020211014A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • 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]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]

Definitions

  • the present disclosure relates to the field of wireless communication, and more specifically to a terminal and a method executed by the terminal.
  • D2D device-to-device
  • V2X Vehicle To Everything
  • D2D technology has great advantages in delay and network capacity
  • D2D technology is used as the basic support technology of V2X.
  • the first method is that the terminal that performs side link transmission autonomously selects resources ;
  • the second method is to perform resource scheduling by a third-party scheduling device (for example, a wireless base station or other terminal).
  • 1A and 1B are schematic diagrams showing resource scheduling in the second method.
  • Figure 1A shows a Uu (UE-UTRAN)-based side link resource scheduling method.
  • the wireless communication system 100 includes a base station 101, a terminal 102, and a terminal 103.
  • side link transmission is performed between the terminal 102 and the terminal 103, and the base station 101 schedules SL resources for the terminal 102 performing the side link transmission.
  • FIG. 1B shows a resource scheduling method in which a third-party terminal schedules side link resources.
  • the wireless communication system 110 includes a terminal 111, a terminal 112, and a terminal 113.
  • the terminal 112 and the terminal 113 perform side link transmission
  • the terminal 111 schedules SL resources for the terminal 112 performing the side link transmission.
  • the description is made by taking as an example that two terminals communicate directly without passing through other nodes (for example, other terminal devices).
  • a method in which a terminal serving as a transmission point and a terminal serving as a receiving point can communicate with other terminals as intermediate nodes has also been proposed, that is, a multi-hop communication method.
  • the terminal can only know the other terminals with which it directly conducts side link communication (that is, communicates in a single-hop (1-hop) manner), but cannot determine the multi-hop link. it's usable or not.
  • the scheduling device cannot perform resource scheduling on the multi-hop link.
  • a terminal including: a receiving unit to receive side link status messages from other terminals, the side link status messages of the other terminals including the available side links of the other terminals Information; and a processing unit, based on the received side link status message, to determine the available multi-hop link of the terminal.
  • the side link status message of each terminal includes at least the ID information of the terminal and the information of the side link more than 1 hop available to the terminal.
  • the processing unit determines the side link status message of the terminal itself, and the terminal further includes: a sending unit that sends the determined side link status message of the terminal itself.
  • the sending unit sends the side link status message of the terminal itself in a period of time that occurs periodically.
  • each of the time periods is divided into a plurality of time slots, and the transmitting unit transmits the side link status message of the terminal itself in one of the multiple time slots.
  • the length of the time period is configured according to the number of terminals to exchange side link status messages with each other.
  • the processing unit determines a resource for sending the side link status message of the terminal itself.
  • the sending unit sends a side link state message of the terminal itself determined by the processing unit to the resource scheduling device.
  • the sending unit sends the side link status message of the terminal itself to the resource scheduling device through high-level signaling.
  • a method executed by a terminal including: receiving side link status messages from other terminals, the side link status messages of the other terminals including available side links of the other terminals ⁇ ; and based on the received side link status message, determine the available multi-hop link of the terminal.
  • the side link status message of each terminal includes at least the ID information of the terminal and the information of the side link more than 1 hop available to the terminal.
  • the side link status message of the terminal itself is determined, and the determined side link status message of the terminal itself is sent.
  • the side link status message of the terminal itself is sent in a period of time that occurs periodically.
  • each of the time periods is divided into multiple time slots, and the side link status message of the terminal itself is sent in one of the multiple time slots.
  • the length of the time period is configured according to the number of terminals to exchange side link status messages with each other.
  • the resource used for sending the side link status message of the terminal itself is determined.
  • the terminal sends its own side link status message to the resource scheduling device.
  • the side link status message of the terminal itself is sent to the resource scheduling device through high-level signaling.
  • FIG. 1A and 1B are schematic diagrams showing resource scheduling modes in side link transmission.
  • Figure 2 is a schematic diagram of a multi-hop link between terminals in V2X communication.
  • FIG. 3 is a flowchart of a method executed by a terminal according to an embodiment of the present disclosure.
  • 4A and 4B are schematic diagrams of a multi-hop link according to an embodiment for explaining the present disclosure.
  • Fig. 5 is an example of a broadcast transmission manner of a side link state message according to an embodiment of the present disclosure.
  • Fig. 6 is a schematic diagram showing a request for resources for sending side link state messages.
  • Fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • Fig. 8 is a schematic diagram of the hardware structure of the involved device according to an embodiment of the present disclosure.
  • the exemplary embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings.
  • the same reference numerals denote the same elements throughout.
  • the embodiments described herein are merely illustrative and should not be construed as limiting the scope of the present disclosure.
  • the terminals described herein may include various types of terminals, such as vehicle terminals, user equipment (UE), mobile terminals (or referred to as mobile stations), or fixed terminals.
  • Figure 2 schematically shows a multi-hop link between terminals in V2X communication.
  • the terminal 201, the terminal 202, and the terminal 203 perform SL communication.
  • the terminal 201 and the terminal 202 directly perform SL transmission
  • the terminal 202 and the terminal 203 directly perform SL transmission.
  • the terminal 201 uses the terminal 202 as an intermediate node to perform SL transmission with the terminal 203 via the terminal 202.
  • the side link between the terminal 201 and the terminal 203 is a multi-hop link, specifically, a 2-hop link (2-hop).
  • the side links between the terminal 201 and the terminal 202, and the terminal 202 and the terminal 203 are single-hop links (1-hop).
  • Figure 2 only illustrates the case of 2-hop SL transmission with side link transmission between two terminals via another terminal, but this is only schematic.
  • the terminals of SL transmission can also realize transmission via more than 2 terminals (intermediate nodes).
  • the link between the terminals of SL transmission is an n+1 hop link.
  • the terminal 201 can determine the terminal with which it directly communicates, that is, the terminal 202, but the terminal 201 cannot know whether it has an available multi-hop link. For example, the terminal 201 cannot know the availability of the 2-hop link between it and the terminal 203. That is, in the existing communication system, it is not known how to determine the availability of a multi-hop link.
  • the present disclosure hopes to provide a terminal and a method for the terminal, so that when multi-hop SL transmission is performed, an available multi-hop link can be determined.
  • FIG. 3 is a flowchart of a method 300 executed by a terminal according to an embodiment of the present disclosure.
  • a side link status message from another terminal is received, and the side link status message of the other terminal includes information about the available side link of the other terminal.
  • the side link status message of the other terminal may include the link information between the other terminal and the terminal executing the method 300, and may also include the link between the other terminal and the terminal executing the method 300.
  • Information about the available side links includes at least the ID information of the terminal and the information of the side link more than 1 hop available to the terminal.
  • step S302 based on the received side link status message, an available multi-hop link of the terminal is determined.
  • the terminal 401 first receives the side link status message from the terminal 402 according to step S301.
  • the ID information of the terminal 402 and the information of the available side links of the terminal 402 other than the link with the terminal 401 are included.
  • the available side link information is the single-hop link information between the terminal 402 and the terminal 403 and the single-hop link information between the terminal 402 and the terminal 405.
  • the information of the single-hop link between the terminal 402 and the terminal 403 and the terminal 405 is, for example, the ID information of the terminal 403 and the terminal 405.
  • the terminal 401 determines the available multi-hop side link of the terminal 401 based on the side link status message from the terminal 402.
  • the processing unit of the terminal 401 determines that the terminal 401 has passed the 2-hop link information received from the terminal 402 based on the single-hop link information between the terminal 402 and the terminal 403 and the terminal 405.
  • the link can communicate with the terminal 403 and the terminal 405, and the intermediate nodes passed by the two 2-hop links are both the terminal 402.
  • the side link status message of the other terminal includes the single-hop link information of the other terminal as an example for description.
  • FIG. 4B a more complicated example will be described in conjunction with FIG. 4B.
  • the terminal 402 can determine an available 2-hop link with the terminal 404, and the intermediate node through which the 2-hop link passes is the terminal 403. Similarly, based on the same steps, the terminal 402 can determine that the 2-hop link with the terminal 406 via the terminal 405 is also available.
  • the side link status message from the terminal 402 received by the terminal 401 according to step S301 includes the ID information of the terminal 402 and the available side link information of the terminal 402.
  • these available side links include the single-hop link between the terminal 402 and the terminal 403 and the terminal 405 and the 2-hop link between the terminal 402 and the terminals 404 and 406 via the terminal 403 and the terminal 405 respectively.
  • the information about the above-mentioned available single-hop link may be, for example, the ID information of the terminal 402 and the terminal 405.
  • the information about the above-mentioned available 2-hop link is, for example, information that associates the ID information of the terminal 403 (terminal 405) and the terminal 404 (terminal 406) in an arbitrary manner in sequence.
  • the terminal 402 may form the following link terminal table shown in Table 1 according to its single-hop link information and 2-hop link information, and send a side link status message indicating the link terminal table:
  • Table 1 Link terminal table of terminal 402
  • the terminal 401 can learn the following information according to the side link status message of the terminal 402: there is an available single-hop link between the terminal 401 itself and the terminal 402; there is an available single-hop link between the terminal 402 and the terminal 403 and the terminal 405 respectively There is an available 2-hop link between the terminal 402 and the terminal 404; the intermediate node that the 2-hop link between the terminal 402 and the terminal 404 passes through is the terminal 403; there is an available 2-hop link between the terminal 402 and the terminal 404 The intermediate node through which the 2-hop link between the terminal 402 and the terminal 406 passes is the terminal 405.
  • the terminal 401 determines that the available side link of the terminal 401 is: the single-hop link between the terminal 401 and the terminal 402, and the difference between the terminal 401 and the terminal 403 according to the ID information of the terminal 402 and the link terminal table.
  • the terminal 401 can determine to 402 indicates that a 4-hop, 5-hop or even n+1 hop link of one of the intermediate nodes is available.
  • the number of multi-hop links available to the terminal, the number of nodes in each multi-link, etc. can be configured to avoid the multi-hop link table that the terminal needs to maintain is too large, resulting in communication Delays and other issues.
  • the link terminal table can only record the ID information of the terminals in the 5-hop link at most.
  • link terminal table is only an example of the present disclosure. As long as the availability of the side link can be expressed, other arbitrary data structure methods can be used instead of the table.
  • a terminal can determine its own available multi-hop side links according to side link status messages from other terminals.
  • the terminal in addition to receiving side link information to determine the multi-hop link available to itself, the terminal can also send its own side link status message so that other terminals can determine according to the side link status message The multi-hop link of the other terminal.
  • the method described in FIG. 3 may further include determining the side link status message of the terminal itself, and sending the side link status message of the terminal itself.
  • the side link status message of the terminal itself includes ID information of the terminal itself and information of the side link with more than 1 hop available for the terminal.
  • the broadcast can be used for transmission.
  • a terminal in a set resource pool/band/carrier/frequency can be configured as a terminal that broadcasts its own side link status message, namely In a communication system, you can (pre-)set the terminal that needs to broadcast the link status message on the sending side.
  • the terminal 401 in FIG. 4B has determined its available single-hop link, 2-hop link, and 3-hop link through step S302. Next, the terminal 401 determines the side link status message of the terminal 401 based on these links.
  • the side link status message to be determined by the terminal 401 includes the ID information of the terminal 401 and the information of the side links available to the terminal 401.
  • the available side link information for example, the information on each side link
  • the ID information of the terminal passing by in the information is stored in association with each other in order. In this example, it is determined as follows:
  • the terminal 401 writes the ID information of the terminal 402 into its side link status message. Therefore, the side link status message contains the information of the available single-hop link of the terminal 401; The available single-hop link information is written in its own side link status message in association with each other. Therefore, the side link status message contains the information of the available 2-hop link of the terminal 401; the information of the terminal 402 In association with the available 2-hop link information of the terminal 402, it is written into its own side link status message. Therefore, the side link status message contains information about the available 3-hop link of the terminal 401.
  • the information of these available side links can be expressed in the form of link terminal table in the side link status message, as shown below:
  • Table 2 Link terminal table of terminal 401
  • the terminal can determine its own available link based on the link terminal table contained in the side link status message of the other terminal. , And update its own link terminal table, and optionally, can send a side link status message containing the updated own link terminal table.
  • the terminal can update the determined available multi-hop side link.
  • the side link state message broadcasted by the terminal may be periodically transmitted, and the period of broadcast transmission may be (pre-)set. This example will be specifically explained with reference to FIG. 5.
  • the resources in the time domain are divided in the manner shown in FIG. 5, and the time domain resources are divided into a plurality of continuous intervals (intervals).
  • the length of the divided intervals can be (pre-)set, and the starting point of each interval can be (pre-)set by an offset.
  • each interval is further divided into a time period for control (control) and a time period for service (service).
  • control control
  • service service
  • These two time periods can be called frame, subframe, symbol, slot, mini-slot, etc.
  • frames for control and frames for service are called frames for service.
  • the starting point of the frame used for control may also coincide with the starting point of the aforementioned interval, and thus, as shown in FIG. 5, the frame used for control and the frame used for service are alternately continuous in the time domain. It can be set to send the side link status message in the frame used for control. At this time, the side link status message is sent periodically.
  • emergency information transmission (Emergency information) or signaling can also be transmitted.
  • the emergency information is, for example, information indicating an emergency situation encountered by the vehicle terminal;
  • the signaling is, for example, signaling used for resource allocation in a service channel.
  • the frame used for control is divided into N consecutive time slots, and in each time slot, the terminal broadcasts the transmission side link state message.
  • each terminal that needs to exchange side link state messages in the same V2X communication network is allocated a time slot, and the terminal broadcasts the sending side link state message in each allocated time slot. Therefore, in order that all terminals that need to broadcast side link status messages are allocated to the time slots for sending, the number of time slots N should be greater than or equal to the number of terminals that need to broadcast.
  • the length of the frame used for control can be configured.
  • the length of the frame used for control can be configured according to the number of terminals that need to perform broadcast transmission. Specifically, when the length of each divided time slot is determined, the number of time slots N varies with each other. The number of terminals to broadcast in the same V2X network varies, so that the length of the frame used for control is configured according to the number N.
  • the terminal may also non-periodically broadcast the transmission side link state message as required. Specifically, the broadcast transmission is performed aperiodically according to the network indication or network configuration.
  • a third-party scheduling device radio base station and other terminals
  • the scheduling device also allocates resources for transmitting side link state messages; and the terminal that performs SL transmission selects the SL resources.
  • the terminal also autonomously selects the resources used for the transmission side link status message, for example, it may perform contention-based resource selection before transmission.
  • the terminal autonomously selects the resources used for the transmission side link status message, and when sending the side link status message, reserves the resources used for the transmission side link status message this time for the next time. Sending of link status messages.
  • the terminal can send the reservation information together with the side link status message.
  • the terminal sends the side link status message in the first time slot of the frame used for control, and reserves the resources used for sending the side link status message this time, so as to be used in the next control frame.
  • the next transmission is performed in the first time slot of the frame.
  • each terminal can learn the reservation status of resources used for transmission side link state messages.
  • a resource set (resource set) may be allocated.
  • transmission repetition or beam-based transmission can be performed.
  • the terminal performing SL transmission selects the resource autonomously, since the terminal has determined the available multi-hop link through the above method, it can perform corresponding resource selection.
  • resource scheduling performed by a third-party scheduling device as shown in FIGS. 1A and 1B, since the scheduling device does not yet know the available side links, resource scheduling cannot be performed smoothly.
  • the method 300 may further include the following step: the terminal sends the determined side link status message of its own to the scheduling device (a wireless base station or a third-party terminal as a scheduling point).
  • the scheduling device a wireless base station or a third-party terminal as a scheduling point.
  • the side link status message sent by the terminal to the scheduling device includes its own ID information and the link terminal table.
  • the terminal may send its own side link status message to the scheduling device according to the configuration information.
  • a terminal in a set resource pool/band/carrier/frequency can be (pre-configured) as a terminal that sends side link state messages to the scheduling device.
  • the side link is sent to each scheduling device Status message.
  • the terminal may periodically send side link status messages to the scheduling device.
  • the broadcast period can be (pre-)set.
  • the terminal may send side link status messages to the scheduling device aperiodically.
  • the broadcast transmission is performed aperiodically according to the network indication or network configuration. For example, it may be sent based on the update of the side link status message instead of periodically, that is, whenever a terminal updates its own side link status message based on the received side link status messages of other terminals, it sends
  • the scheduling device sends the updated side link status message, otherwise it does not send it.
  • the terminal uses high-level signaling (for example, radio resource control (Radio Resource Control, RRC) signaling) to send the side link to the base station in the uplink (Uplink). Status message.
  • high-level signaling for example, radio resource control (Radio Resource Control, RRC) signaling
  • RRC Radio Resource Control
  • the terminal uses high-level signaling (for example, RRC-like signaling) to send side link status messages to other terminals in the side link.
  • high-level signaling for example, RRC-like signaling
  • the terminal may use physical layer signaling to send a side link state message to the scheduling device.
  • the scheduling device (a wireless base station or a third-party terminal as a scheduling point) can grasp the status of the side links available in the V2X communication network, so as to smoothly perform resource scheduling.
  • FIG. 7 is a schematic structural diagram of a terminal 700 according to an embodiment of the present disclosure.
  • the terminal 700 includes a receiving unit 710, which receives side link status messages from other terminals, and the side link status messages of the other terminals include information about available side links of the other terminals.
  • the side link status message of the other terminal may include information about the link between the other terminal and the terminal 700, and in addition, it may also include information about the available side link of the other terminal except the link with the terminal 700. information.
  • the side link status message of each terminal includes at least the ID information of the terminal and the information of the side link more than 1 hop available to the terminal.
  • the terminal 700 further includes a processing unit 720, which determines an available multi-hop link of the terminal based on the received side link status message.
  • the terminal 700 may also include other components. However, since these components have nothing to do with the content of the embodiments of the present disclosure, their illustrations and descriptions are omitted here.
  • the side link status message from the other terminal received by the receiving unit 700 includes the ID information of the other terminal and the information of the available single-hop link of the other terminal. If the other terminal is used as the transmitting end, the information of the single-hop link is, for example, the ID information of the terminal serving as the receiving end.
  • the processing unit 720 determines, based on the side link status message received by the receiving unit 710, that the 2-hop side link between the terminal 700 and the aforementioned terminal serving as the receiving point is available via the other terminal.
  • the side link status message from the other terminal received by the receiving unit 710 includes the ID information of the other terminal and the information of the available n-hop link of the other terminal.
  • the processing unit 720 The availability of an n+1 hop side link of the terminal 700 with the other terminal as an intermediate node can be determined based on the side link state message.
  • the terminal 700 may further include a sending unit 730 for sending its own side link status message, so that other terminals can determine the multi-hop link of the other terminal according to the side link status message.
  • the processing unit 720 determines its own side link status message; the sending unit 730 sends the side link status message of the terminal 700 determined by the processing unit 720, and in one example, it is sent in a broadcast manner.
  • the terminal 700 that performs the above-mentioned broadcast transmission may be (pre-)set.
  • terminals in a set resource pool/band/carrier/frequency, etc. can be (pre-configured) as terminals for broadcast transmission.
  • the side link status message to be determined by the processing unit 720 includes ID information of the terminal 700 and information about the side links available to the terminal 700. Specifically, the processing unit 710 writes the ID information of each terminal in the determined available side link of the terminal 700 into the side link state message in an orderly association.
  • the information of the side links available to the terminal 700 can be expressed in the form of a terminal link table:
  • Table 3 Link terminal table of terminal 700
  • the availability of the following side links of the terminal 700 is shown: the link for single-hop communication with the terminal of ID#0; the link for 2-hop communication with the terminal of ID#1 via the terminal of ID#0 Road; a 2-hop communication link with ID#2 terminal via ID#0 terminal; 3-hop communication link with ID#3 terminal via ID#0 terminal and ID#1 terminal in turn ; A 3-hop communication link with the terminal of ID#4 via the terminal of ID#0 and the terminal of ID#2 in sequence.
  • the number of multi-hop links available to the terminal 700, the number of nodes in each of the multiple links, etc. can be configured to prevent the terminal from needing to maintain too large a table of multiple links, which may cause communication delay and other problems.
  • the link terminal table may only record the ID information of the terminals in the 5-hop link at most.
  • link terminal table is only an example of the present disclosure. As long as the availability of the side link can be expressed, other arbitrary data structure methods can be used instead of the table.
  • the processing unit 720 can determine its own status based on the link terminal table contained in the side link status message of the other terminal. Available links, and update its own link terminal table, and optionally, the sending unit 730 sends a side link status message including the updated own link terminal table.
  • the side link status message broadcasted by the sending unit 730 may be sent periodically. And, the period of broadcast transmission can be (pre-)set. This example will be specifically explained with reference to FIG. 5.
  • the resources in the time domain are divided in the manner shown in FIG. 5, and the time domain resources are divided into a plurality of continuous intervals (intervals).
  • the length of the divided intervals can be (pre-)set, and the starting point of each interval can be (pre-)set by an offset.
  • each interval is further divided into a time period for control and a time period for service.
  • These two time periods can be called frame, subframe, symbol, slot, mini-slot, etc.
  • frames for control and frames for service are called frames for service.
  • the starting point of the frame used for control may also coincide with the starting point of the aforementioned interval, and thus, as shown in FIG. 5, the frame used for control and the frame used for service are alternately continuous in the time domain. It can be set to send the side link status message in the frame used for control. At this time, the side link status message is sent periodically.
  • emergency information transmission (Emergency information) or signaling can also be transmitted.
  • the emergency information is, for example, information indicating an emergency situation encountered by the vehicle terminal;
  • the signaling is, for example, signaling used for resource allocation in a service channel.
  • the frame used for control is divided into N consecutive time slots, and in each time slot, a transmission side link state message is broadcast.
  • each terminal that needs to exchange side link state messages in the same V2X communication network is allocated a time slot, and the terminal broadcasts the sending side link state message in each allocated time slot. Therefore, in order that all terminals that need to broadcast side link status messages are allocated to the time slots for sending, the number of time slots N should be greater than or equal to the number of terminals that need to broadcast.
  • the length of the frame used for control can be configured.
  • the length of the frame used for control can be configured according to the number of terminals that need to perform broadcast transmission. Specifically, when the length of each divided time slot is determined, the number of time slots N varies with each other. The number of terminals to broadcast in the same V2X network varies, so that the length of the frame used for control is configured according to the number N.
  • the side link state message broadcasted by the sending unit 730 may also be sent aperiodically. Specifically, the broadcast transmission is performed aperiodically according to the network indication or network configuration.
  • a third-party scheduling device radio base station and other terminals
  • the scheduling device also allocates resources for the transmission side link state message; and when the terminal 700 itself selects the SL resources, the terminal 700 autonomously selects resources for transmission side link state messages, for example, contention-based resource selection may be performed before transmission.
  • the terminal 700 autonomously selects a way for transmitting the side link state messages.
  • the processing unit 720 reserves the resources used for sending the side link status message this time for the next sending of the side link status message.
  • the sending unit 730 may send the reservation information together with the side link status message.
  • the sending unit 730 sends the side link status message in the first time slot of the frame used for control, and the processing unit 730 reserves the resources used to send the side link status message this time, so that the sending The unit 730 performs the next transmission in the first time slot of the next frame used for control.
  • each terminal can learn the reservation status of resources used for transmission side link state messages.
  • a resource set (resource set) may be allocated.
  • transmission repetition or beam-based transmission can be performed.
  • the sending unit 730 may also send the determined side link status message of itself to the scheduling device (a wireless base station or a third-party terminal as a scheduling point), so that the scheduling device is based on the available side of the terminal 700
  • the link information schedules the available side link resources of the terminal 700.
  • the side link status message sent by the sending unit 730 to the scheduling device includes the ID information of the terminal 700 and the link terminal table.
  • the terminal 700 may send its own side link state information to the scheduling device according to the configuration information.
  • terminals in a set resource pool/band/carrier/frequency can be set (pre-)as the terminal that sends side link status messages to the scheduling device.
  • the sending unit 730 sends the side link to each scheduling device. Status message.
  • the sending unit 730 may periodically send the side link state message to the scheduling device.
  • the broadcast period can be (pre-)set.
  • the sending unit 730 may send the side link state message to the scheduling device aperiodically. Specifically, the broadcast transmission is performed aperiodically according to the network indication or network configuration. For example, it may be sent based on the update of the side link status message rather than periodically, that is, whenever the receiving unit 710 receives the side link status message of other terminals, the processing unit 720 updates its own side link status. After the message is sent, the sending unit 730 sends the updated side link status message to the scheduling device, otherwise it does not send it.
  • the sending unit 730 uses high-level signaling (for example, radio resource control (Radio Resource Control, RRC) signaling) to transmit to the base station in the uplink (Uplink).
  • RRC Radio Resource Control
  • the sending unit 730 uses high-level signaling (for example, RRC-like signaling) to send the side link status to other terminals in the side link. news.
  • high-level signaling for example, RRC-like signaling
  • the sending unit 730 may use physical layer signaling to send the side link state message to the scheduling device.
  • each functional block can be realized by one device that is physically and/or logically combined, or two or more devices that are physically and/or logically separated can be directly and/or indirectly (for example, It is realized by the above-mentioned multiple devices through wired and/or wireless) connection.
  • a device such as a terminal, etc.
  • a device may function as a computer that executes the processing of the wireless communication method of the present disclosure.
  • FIG. 8 is a schematic diagram of the hardware structure of the involved device 800 (terminal) according to an embodiment of the present disclosure.
  • the aforementioned device 800 (terminal) may be constituted as a computer device that physically includes a processor 810, a memory 820, a storage 830, a communication device 840, an input device 850, an output device 860, a bus 870, and the like.
  • the words “device” may be replaced with circuits, devices, units, etc.
  • the hardware structure of the terminal may include one or more of the devices shown in the figure, or may not include some of the devices.
  • processor 810 For example, only one processor 810 is shown in the figure, but it may be multiple processors.
  • processing may be executed by one processor, or may be executed by more than one processor simultaneously, sequentially, or by other methods.
  • processor 810 may be installed by more than one chip.
  • Each function of the device 800 is realized by, for example, the following way: by reading predetermined software (programs) into hardware such as the processor 810 and the memory 820, the processor 810 is allowed to perform calculations to control the communication performed by the communication device 840 , And control the reading and/or writing of data in the memory 820 and the memory 830.
  • predetermined software programs
  • the processor 810 is allowed to perform calculations to control the communication performed by the communication device 840 , And control the reading and/or writing of data in the memory 820 and the memory 830.
  • the processor 810 operates, for example, an operating system to control the entire computer.
  • the processor 810 may be constituted by a central processing unit (CPU, Central Processing Unit) including an interface with peripheral devices, a control device, a computing device, and a register.
  • CPU Central Processing Unit
  • the aforementioned processing unit and the like may be implemented by the processor 810.
  • the processor 810 reads programs (program codes), software modules, data, etc. from the memory 830 and/or the communication device 840 to the memory 820, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the program a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiments can be adopted.
  • the processing unit of the terminal 700 may be implemented by a control program stored in the memory 820 and operated by the processor 810, and other functional blocks may also be implemented in the same way.
  • the memory 820 is a computer-readable recording medium, such as Read Only Memory (ROM), Programmable Read Only Memory (EPROM, Erasable Programmable ROM), Electrically Programmable Read Only Memory (EEPROM, Electrically EPROM), It is composed of at least one of random access memory (RAM, Random Access Memory) and other suitable storage media.
  • the memory 820 may also be called a register, a cache, a main memory (main storage device), and the like.
  • the memory 820 may store executable programs (program codes), software modules, etc. used to implement the methods involved in an embodiment of the present disclosure.
  • the memory 830 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a CD-ROM (Compact Disc ROM), etc.), Digital universal discs, Blu-ray (registered trademark) discs), removable disks, hard drives, smart cards, flash memory devices (for example, cards, sticks, key drivers), magnetic strips, databases , A server, and at least one of other appropriate storage media.
  • the memory 830 may also be referred to as an auxiliary storage device.
  • the communication device 840 is hardware (transmitting and receiving equipment) used for communication between computers via a wired and/or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc., for example.
  • the communication device 840 may include high-frequency switches, duplexers, filters, frequency synthesizers, and the like.
  • the aforementioned sending unit, receiving unit, etc. may be implemented by the communication device 840.
  • the input device 850 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 860 is an output device that implements output to the outside (for example, a display, a speaker, a light emitting diode (LED, Light Emitting Diode) lamp, etc.).
  • the input device 850 and the output device 860 may also be an integrated structure (for example, a touch panel).
  • bus 870 for communicating information.
  • the bus 870 may be composed of a single bus, or may be composed of different buses between devices.
  • the terminal may include a microprocessor, a digital signal processor (DSP, Digital Signal Processor), an application specific integrated circuit (ASIC, Application Specific Integrated Circuit), a programmable logic device (PLD, Programmable Logic Device), and a field programmable gate array (FPGA, Field Programmable Gate Array) and other hardware, through which part or all of the functional blocks can be realized.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • PLD programmable logic device
  • FPGA Field Programmable Gate Array
  • the processor 810 may be installed by at least one of these hardwares.
  • channels and/or symbols can also be signals (signaling).
  • the signal can also be a message.
  • the reference signal may also be referred to as RS (Reference Signal) for short, and may also be referred to as pilot (Pilot), pilot signal, etc., according to applicable standards.
  • component carrier CC, Component Carrier
  • CC Component Carrier
  • the information, parameters, etc. described in this specification may be expressed in absolute values, may be expressed in relative values to predetermined values, or may be expressed in corresponding other information.
  • the wireless resource can be indicated by a prescribed index.
  • the formulas etc. using these parameters may also be different from those explicitly disclosed in this specification.
  • the information, signals, etc. described in this specification can be expressed using any of a variety of different technologies.
  • the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be mentioned in all the above descriptions can pass voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of them. Combination to express.
  • information, signals, etc. can be output from the upper layer to the lower layer, and/or from the lower layer to the upper layer.
  • Information, signals, etc. can be input or output via multiple network nodes.
  • the input or output information, signals, etc. can be stored in a specific place (such as memory), or can be managed through a management table.
  • the input or output information, signals, etc. can be overwritten, updated or supplemented.
  • the output information, signals, etc. can be deleted.
  • the input information, signals, etc. can be sent to other devices.
  • the notification of information is not limited to the mode/implementation described in this specification, and may be performed by other methods.
  • the notification of information may be through physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, radio resource control (RRC, Radio Resource Control) signaling, broadcast information (Master Information Block (MIB, Master Information Block), System Information Block (SIB, System Information Block), etc.), media access control (MAC, Medium Access Control) signaling ), other signals or a combination of them.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may also be referred to as L1/L2 (layer 1/layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may also be referred to as an RRC message, for example, it may be an RRC Connection Setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, and so on.
  • the MAC signaling may be notified by, for example, a MAC control element (MAC CE (Control Element)).
  • the notification of prescribed information is not limited to being explicitly performed, and may also be done implicitly (for example, by not performing notification of the prescribed information, or by notification of other information).
  • the judgment can be made by the value (0 or 1) represented by 1 bit, by the true or false value (Boolean value) represented by true (true) or false (false), or by the comparison of numerical values ( For example, comparison with a predetermined value) is performed.
  • software, commands, information, etc. may be transmitted or received via a transmission medium.
  • a transmission medium For example, when using wired technology (coaxial cable, optical cable, twisted pair, digital subscriber line (DSL, Digital Subscriber Line), etc.) and/or wireless technology (infrared, microwave, etc.) to send from a website, server, or other remote resources
  • wired technology coaxial cable, optical cable, twisted pair, digital subscriber line (DSL, Digital Subscriber Line), etc.
  • wireless technology infrared, microwave, etc.
  • system and "network” used in this manual can be used interchangeably.
  • base station BS, Base Station
  • radio base station eNB
  • gNB gNodeB
  • cell gNodeB
  • cell group femto cell
  • carrier femto cell
  • the base station can accommodate one or more (for example, three) cells (also called sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also pass through the base station subsystem (for example, indoor small base stations (RF remote heads (RRH, Remote Radio Head))) to provide communication services.
  • RF remote heads RF remote Radio Head
  • mobile station MS, Mobile Station
  • user terminal user terminal
  • UE User Equipment
  • terminal can be used interchangeably.
  • Mobile stations are sometimes used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless Terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.
  • the wireless base station in this specification can also be replaced with a user terminal.
  • the various modes/implementations of the present disclosure can also be applied.
  • the functions of the first communication device or the second communication device in the aforementioned device 800 can be regarded as the functions of the user terminal.
  • words such as "up” and “down” can also be replaced with "side”.
  • the uplink channel can also be replaced with a side channel.
  • the user terminal in this specification can also be replaced with a wireless base station.
  • the above-mentioned functions of the user terminal can be regarded as functions of the first communication device or the second communication device.
  • a specific operation performed by a base station may also be performed by its upper node depending on the situation.
  • various actions performed for communication with the terminal can pass through the base station or more than one network other than the base station.
  • Nodes for example, Mobility Management Entity (MME), Serving-Gateway (S-GW, Serving-Gateway), etc. can be considered, but not limited to this), or a combination of them.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • Serving-Gateway Serving-Gateway
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • LTE-B Long Term Evolution Beyond
  • LTE-Beyond Super 3rd generation mobile communication system
  • IMT-Advanced 4th generation mobile communication system
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • FAA Future Radio Access
  • New-RAT Radio Access Technology
  • NR New Radio
  • new radio access NX, New radio access
  • FX Future generation radio access
  • GSM Global System for Mobile communications
  • CDMA3000 Code Division Multiple Access 3000
  • UMB Ultra Mobile Broadband
  • UMB Ultra Mobile Broadband
  • IEEE 920.11 Wi-Fi (registered trademark)
  • IEEE 920.16 WiMAX
  • any reference to units using names such as "first” and “second” used in this specification does not fully limit the number or order of these units. These names can be used in this specification as a convenient way to distinguish two or more units. Therefore, the reference of the first unit and the second unit does not mean that only two units can be used or that the first unit must precede the second unit in several forms.
  • determining used in this specification may include various actions. For example, with regard to “judgment (determination)", calculation (calculating), calculation (computing), processing (processing), deriving (deriving), investigation (investigating), search (looking up) (such as tables, databases, or other Search), confirmation (ascertaining) in the data structure, etc. are regarded as “judgment (confirmation)”. In addition, with regard to “judgment (determination)", it is also possible to combine receiving (for example, receiving information), transmitting (for example, sending information), input, output, and accessing (for example, Access to data in the memory), etc. are regarded as “judgment (confirmation)”.
  • judgment (determination) resolving, selecting, choosing, establishing, comparing, etc. can also be regarded as performing "judgment (determination)”.
  • judgment (confirmation) several actions can be regarded as “judgment (confirmation)”.
  • connection refers to any direct or indirect connection or combination between two or more units, which can be It includes the following situations: between two units that are “connected” or “combined” with each other, there is one or more intermediate units.
  • the combination or connection between the units may be physical, logical, or a combination of the two. For example, "connect” can also be replaced with "access”.
  • two units are connected by using one or more wires, cables, and/or printed electrical connections, and as a number of non-limiting and non-exhaustive examples, by using radio frequency areas , Microwave region, and/or light (both visible light and invisible light) region wavelength electromagnetic energy, etc., are “connected” or “combined” with each other.

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Abstract

本公开提供一种终端及由该终端执行的方法。该终端包括：接收单元，接收来自其他终端的侧链路状态消息，所述侧链路状态消息至少包括所述其他终端的除了与所述终端之间的链路以外的可用的侧链路的信息；以及处理单元，基于所接收到的侧链路状态消息，确定所述终端的可用的多跳链路。

Description

终端以及由终端执行的方法 技术领域
本公开涉及无线通信领域，并且更具体地涉及一种终端以及由终端执行的方法。
背景技术
为了提高通信系统的频谱利用率，已经提出了设备到设备(Device-to-Device，D2D)通信的技术。在D2D通信中，数据可直接在终端之间传输，而不需要通过基站等网络侧设备，从而减小了时延，增加了网络容量，提高了频谱利用率等。
另外，为了提升交通系统的安全性和智能化，已经提出了车联网(例如：Vehicle To Everything，V2X)。V2X要求车辆之间的通信时延较低、网络容量较大等，而由于D2D技术在时延、网络容量等方面具有很大的优势，因此，D2D技术被作为V2X的基础支撑技术。
在NR中，关于在V2X中进行通信的终端之间的侧链路(Sidelink，SL)资源的调度，提出了两种不同的方式：方式一是由进行侧链路传输的终端自主地选择资源；方式二是由第三方调度设备(例如，无线基站或者其他终端)来进行资源调度。图1A、1B是表示方式二的资源调度的示意图。
图1A表示了基于Uu(UE-UTRAN)的侧链路资源调度方式。如图1A所示，无线通信系统100包括基站101、终端102、以及终端103。在这种传输模式中，终端102和终端103之间进行侧链路传输，由基站101对进行侧链路传输的终端102调度SL资源。
图1B表示了由第三方终端调度侧链路资源的资源调度方式。如图1B所示，无线通信系统110包含终端111、终端112、以及终端113。在这种传输模式中，终端112和终端113之间进行侧链路传输，由终端111对进行侧链路传输的终端112调度SL资源。
在图1A和图1B所示的示例中，以两个终端之间不经由其他节点(例如，其他终端设备)，直接进行通信为例进行了描述。近年来还提出了，可通过在作为发送点的终端和作为接收点的终端以其他终端作为中间节点而进行通信的方式，即，多跳(multi-hop)通信方式。然而，在现有的车联网通信系统 中，终端只能够知道与其直接进行侧链路通信(即，采用单跳(1-hop)的方式进行通信)的其他终端，而无法确定多跳链路是否可用。进而调度设备也无法对于多跳链路进行资源调度。
发明内容
根据本公开的一个方面，提供了一种终端，包括：接收单元，接收来自其他终端的侧链路状态消息，所述其他终端的侧链路状态消息包括所述其他终端的可用侧链路的信息；以及处理单元，基于所接收到的侧链路状态消息，确定所述终端的可用多跳链路。
根据本公开的一个示例，每个终端的侧链路状态消息至少包括该终端的ID信息及该终端可用的1跳以上侧链路的信息。
根据本公开的一个示例，所述处理单元确定所述终端自身的侧链路状态消息，所述终端还包括：发送单元，发送所确定的所述终端自身的侧链路状态消息。
根据本公开的一个示例，所述发送单元在周期性出现的时间段中发送所述终端自身的侧链路状态消息。
根据本公开的一个示例，每个所述时间段被划分为多个时隙，所述发送单元在所述多个时隙之一中发送所述终端自身的侧链路状态消息。
根据本公开的一个示例，所述时间段的长度根据要相互交换侧链路状态消息的终端的数量而被配置。
根据本公开的一个示例，所述处理单元确定用于发送所述终端自身的侧链路状态消息的资源。
根据本公开的一个示例，所述发送单元向资源调度设备发送由所述处理单元确定的所述终端自身的侧链路状态消息。
根据本公开的一个示例，所述发送单元通过高层信令向资源调度设备发送所述终端自身的侧链路状态消息。
根据本公开的另一个方面，提供一种由终端执行的方法，包括：接收来自其他终端的侧链路状态消息，所述其他终端的侧链路状态消息包括所述其他终端的可用侧链路的信息；以及基于所接收到的侧链路状态消息，确定所述终端的可用多跳链路。
根据本公开的一个示例，每个终端的侧链路状态消息至少包括该终端的 ID信息以及该终端可用的1跳以上侧链路的信息。
根据本公开的一个示例，确定所述终端自身的侧链路状态消息，并发送所确定的所述终端自身的侧链路状态消息。
根据本公开的一个示例，在周期性出现的时间段中发送所述终端自身的侧链路状态消息。
根据本公开的一个示例，每个所述时间段被划分为多个时隙，在所述多个时隙之一中发送所述终端自身的侧链路状态消息。
根据本公开的一个示例，所述时间段的长度根据要相互交换侧链路状态消息的终端的数量而被配置。
根据本公开的一个示例，确定用于发送所述终端自身的侧链路状态消息的资源。
根据本公开的一个示例，所述终端向资源调度设备发送所述终端自身的侧链路状态消息。
根据本公开的一个示例，通过高层信令向资源调度设备发送所述终端自身的侧链路状态消息。
附图说明
通过结合附图对本公开实施例进行更详细的描述，本公开的上述以及其他目的、特征和优势将变得更加明显。附图用来提供对本公开实施例的进一步理解，并且构成说明书的一部分，与本公开实施例一起用于解释本公开，并不构成对本公开的限制。在附图中，相同的参考标号通常代表相同部件或步骤。
图1A、1B是表示侧链路传输中资源调度模式的示意图。
图2是V2X通信中终端之间的多跳链路的示意图。
图3是根据本公开的实施例的由终端执行的方法的流程图。
图4A、4B是根据用于说明本公开的实施例的多跳链路的示意图。
图5是根据本公开的实施例的侧链路状态消息的广播发送方式的一个示例。
图6是表示请求用于发送侧链路状态消息的资源的示意图。
图7是根据本公开实施例的终端的结构示意图。
图8是根据本公开实施例的所涉及的设备的硬件结构的示意图。
具体实施方式
为了使得本公开的目的、技术方案和优点更为明显，下面将参照附图详细描述根据本公开的示例实施例。在附图中，相同的参考标号自始至终表示相同的元件。应当理解：这里描述的实施例仅仅是说明性的，而不应被解释为限制本公开的范围。此外，这里所述的终端可以包括各种类型的终端，例如车辆终端、用户终端(User Equipment，UE)、移动终端(或称为移动台)或者固定终端。
图2示意性地示出了在V2X通信中终端之间的多跳(multi-hop)链路。如图2所示，在无线通信系统200中，终端201、终端202、以及终端203之间进行SL通信。其中，终端201与终端202之间直接进行SL传输，终端202与终端203之间直接进行SL传输，终端201以终端202为中间节点，经由终端202而与终端203之间进行SL传输。在该情况下，终端201与终端203之间的侧链路为多跳链路，具体而言，是2跳链路(2-hop)。相应地，终端201与终端202、终端202与终端203之间的侧链路为单跳链路(1-hop)。
需要认识到，图2仅图示了2个终端之间经由另一个终端来进行侧链路传输的2跳SL传输的情况，但这只是示意性的，在图2的无线通信系统中，进行SL传输的终端之间还可以经由2个以上的终端(中间节点)而实现传输，此时进行SL传输的终端之间的链路为n+1跳链路。
在图2所示的示例中，终端201能够确定直接与其进行通信的终端，即，终端202，然而终端201无法获知其是否存在可用的多跳链路。例如，终端201不能知晓其与终端203之间的2跳链路的可用性。即，在现有的通信系统中，不知道如何确定多跳链路的可用性。
针对以上问题，本公开希望提供一种终端及用于终端的方法，使得在进行多跳的SL传输时，能够确定可用的多跳链路。
下面参照图3来说明根据本公开的实施例的由终端执行的方法。图3是根据本公开的实施例的由终端执行的方法300的流程图。如图3所示，在步骤S301中，接收来自其他终端的侧链路状态消息，该其他终端的侧链路状态消息包括所述其他终端的可用侧链路的信息。例如，其他终端的侧链路状态消息可包括该其他终端与执行方法300的终端之间的链路信息，此外，还可包括该其他终端的除了与执行方法300的终端之间的链路以外的可用侧链路 的信息。此外，根据本公开的一个示例，每个终端的侧链路状态消息至少包括该终端的ID信息及该终端可用的1跳以上侧链路的信息。
然后，根据步骤S302，基于所接收到的侧链路状态消息，确定所述终端的可用的多跳链路。
以下将结合图4A、图4B所示的链路的示意图，对图3中所示的方法的具体示例进行进一步说明。
多跳链路确定示例1
在图4A所示的示例中，终端401首先根据步骤S301接收来自终端402的侧链路状态消息。
在来自终端402的侧链路状态消息中，包含终端402的ID信息以及以终端402的除了与终端401之间的链路之外的可用的侧链路的信息。例如，在图4A所示的示例中，该可用的侧链路的信息是终端402与终端403之间的单跳链路的信息以及终端402与终端405之间的单跳链路的信息。
根据本实施例的一个示例，终端402与终端403、终端405之间的单跳链路的信息，例如是终端403、终端405的ID信息。
然后，根据步骤S302，终端401基于来自终端402的侧链路状态消息，确定终端401的可用的多跳侧链路。如上所述，在图4A所示的示例中，终端401的处理单元根据从终端402收到的终端402与终端403、终端405之间的单跳链路的信息，而确定终端401通过2跳链路可以与终端403、终端405进行通信，并且这两条2跳链路所经过的中间节点均为终端402。
多跳链路确定示例2
在图4A所示的示例中，以其他终端的侧链路状态消息包括该其他终端的单跳链路信息为例进行了描述，以下，将结合图4B说明一个更复杂的例子。
如图4B所示，假设终端403与还与终端404之间存在可用的单跳侧链路。那么，参照如上所述的内容，终端402可以确定一条与终端404之间的可用的2跳链路，该2跳链路所经过的中间节点为终端403。同理，基于相同的步骤，终端402可以确定与终端406之间经由终端405的2跳链路也是可用。
如上所述，终端401根据步骤S301所接收到的来自终端402的侧链路状态消息中，包含终端402的ID信息以及终端402的可用的侧链路信息。此时， 这些可用的侧链路包括终端402与终端403、终端405之间的单跳链路以及终端402与终端404、406之间分别经由终端403、终端405的2跳链路。
如上所述，关于上述可用的单跳链路的信息例如可以是终端402与终端405的ID信息。根据本实施例的一个示例，关于上述可用的2跳链路的信息例如是将终端403(终端405)与终端404(终端406)的ID信息按顺序依次以任意的方式进行关联的信息。例如，终端402可根据其单跳链路的信息和2跳链路的信息形成以下如表1所示的链路终端表，并发送指示该链路终端表的侧链路状态消息：
单跳终端 2跳终端
终端403ID 终端404ID
终端405ID 终端406ID
表1：终端402的链路终端表
终端401根据终端402的侧链路状态消息可以获知以下信息：终端401自身与终端402之间存在可用的单跳链路；终端402分别与终端403、终端405之间存在可用的单跳链路；终端402与终端404之间存在可用的2跳链路；终端402与终端404之间的2跳链路所经过的中间节点为终端403；终端402与终端404之间存在可用的2跳链路；终端402与终端406之间的2跳链路所经过的中间节点为终端405。
从而，根据步骤S302，终端401根据终端402的ID信息以及链路终端表，确定终端401的可用的侧链路为：终端401与终端402之间的单跳链路；终端401与终端403之间经由终端402的2跳链路；终端401与终端404之间的依次经由终端402、终端403的3跳链路；终端401与终端405之间经由终端402的2跳链路；终端401与终端406之间的依次经由终端405、终端406的3跳链路。
类似地，当终端401接收到的来自终端402的侧链路信息中，还包含终端402的可用的3跳链路、4跳链路乃至n跳链路的信息时，终端401可以确定以终端402为其中一个中间节点的4跳、5跳乃至n+1跳的链路是可用的。
此外，根据本发明的另一示例，可以配置终端可用的多跳链路的数量、每条多条链路的节点数量等，以避免终端需要维持的多跳链路表格过于庞大，从而造成通信迟延等问题。例如，可以使链路终端表最多只记载5跳链路中 的终端的ID信息。
需要注意的是，链路终端表仅为本公开的一个示例，只要可以表现侧链路的可用性，那么也可以不使用表格而使用其他任意的数据构成方式。
在以上结合图3、图4A和4B等描述的方法中，一终端能够根据来自其他终端的侧链路状态消息确定自身可用的多跳侧链路。
此外，根据本实施例的一个示例，终端除了接收侧链路信息以确定自身可用的多跳链路以外，还可发送自身的侧链路状态消息，以便其他终端根据该侧链路状态消息确定该其他终端的多跳链路。在此情况下，图3中所述的方法还可包括确定所述终端自身的侧链路状态消息，以及发送该所述终端自身的侧链路状态消息。例如，所述终端自身的侧链路状态消息包含所述终端自身的ID信息以及以所述终端的可用的1跳以上的侧链路的信息。又例如，可以采用广播的方式进行发送。
根据本实施例的一个示例，在一个V2X通信网络中，可以将处于设定的资源池/带域/载波/频率等之中的终端配置为广播发送自身的侧链路状态消息的终端，即，在一个通信系统中，可以(预)设定需要进行广播发送侧链路状态消息的终端。
仍旧以图4B为例进行说明上述发送。如上所述，图4B中的终端401已经通过步骤S302确定了其可用的单跳链路、2跳链路以及3跳链路。接下来，终端401以这些链路为基础确定终端401的侧链路状态消息。
在一个示例中，终端401所要确定的侧链路状态消息包含终端401的ID信息以及终端401可用的侧链路的信息，对于其可用的侧链路信息，例如是将在各条侧链路中所经过的终端的ID信息按顺序相关联地保存的信息。在该示例中，采用如下的方式确定：
终端401将终端402的ID信息写入自身的侧链路状态消息中，由此，侧链路状态消息中包含了终端401的可用的单跳链路的信息；将终端402的信息与终端402的可用的单跳链路信息相关联地写入自身的侧链路状态消息中，由此，侧链路状态消息中包含了终端401的可用的2跳链路的信息；将终端402的信息与终端402的可用的2跳链路信息相关联地写入自身的侧链路状态消息中，由此，侧链路状态消息中包含了终端401的可用的3跳链路的信息。
同样地，这些可用的侧链路的信息在侧链路状态消息中可以以链路终端表的形式表现，如下所示：
单跳终端 2跳终端 3跳终端
终端402ID 终端403ID 终端404ID
终端402ID 终端405ID 终端406ID
表2：终端401的链路终端表
根据本发明的另一示例，每当接收到来自其他终端的侧链路状态消息时，终端就可基于其他终端的侧链路状态消息中包含的链路终端表来确定自身的可用的链路，并更新自身的链路终端表，并且可选择地，可将包含指示该更新的自身链路终端表的侧链路状态消息进行发送。由此，即使其他终端出现了增减，该终端也能够更新所确定的可用多跳侧链路。
此外，根据本实施例的一个示例，由终端进行广播发送的侧链路状态消息可以被周期性地发送，并且广播发送的周期可以被(预)设定。参照图5具体说明该示例。
首先按照图5所示的方式划分时域上的资源，将时域资源划分为多个连续的间隔(interval)。被划分的间隔的长度可以被(预)设定，每个间隔的起点可以由一个偏移量来(预)设定。
然后，进一步将每个间隔划分为用于控制(control)的时间段和用于服务(service)的时间段。可以将这两个时间段称为帧(frame)、子帧(subframe)、码元(symbol)、时隙(slot)、微时隙(mini-slot)等，以下为了说明的便利，分别将它们称为用于控制的帧和用于服务的帧。
用于控制的帧的起点也可以与上述间隔的起点重合，由此，如图5所示，用于控制的帧和用于服务的帧在时域上交替地连续。可以设为在用于控制的帧中发送侧链路状态消息，此时，侧链路状态消息被周期性地发送。
在用于控制的帧中，除了发送侧链路状态消息之外，还可以传输紧急信息传输(Emergency information)或者传输信令。所述紧急信息例如是表示车辆终端所遇到紧急情况的信息；所述信令例如是用于进行服务信道中的资源分配的信令。
此外，如图5所示，在一个示例中，用于控制的帧被划分为N个连续的 时隙，在每个时隙中，终端广播发送侧链路状态消息。具体地，在一个相同的V2X通信网络中要进行侧链路状态消息交换的每个终端都被分配到一个时隙，终端在每个被分配的时隙中广播发送侧链路状态消息。因此，为了所有需要进行侧链路状态消息广播的终端都被分配到进行发送的时隙，时隙的个数N应当大于等于需要进行广播的终端的数量。
在一个示例中，用于控制的帧的长度可以被配置。例如，可以根据需要进行广播发送的终端的数量来配置用于控制的帧的长度，具体而言，在被划分的每个时隙长度确定的情况下，时隙的个数N随着在一个相同的V2X网络中要进行广播的终端的数量而变化，从而根据个数N来配置用于控制的帧的长度。
可替换地，终端也可以根据需要非周期性地广播发送侧链路状态消息。具体而言，根据网络指示(network indication)或者网络配置(network configuration)来非周期性地进行广播发送。
接下来，说明如何分配用于发送侧链路状态消息的资源。当由第三方调度设备(无线基站以及其他终端)来调度SL资源时，也由该调度设备来分配用于传输侧链路状态消息的资源；而在由进行SL传输的终端自身来选择SL资源时，终端也自主地选择用于传输侧链路状态消息的资源，例如，可以在传输前进行基于竞争的资源选择。
结合图6说明在周期性发送侧链路状态消息的情况下，终端自主地选择用于传输侧链路状态消息的资源的一种方式。
在图6中，终端自主地选择用于传输侧链路状态消息的资源，并在发送侧链路状态消息时，预留本次用于发送侧链路状态消息的资源以用于下一次侧链路状态消息的发送。终端可以将该预留信息与侧链路状态消息一起进行发送。如图6所示，终端在用于控制的帧的第一个时隙中发送侧链路状态消息，并预留发送本次侧链路状态消息时所用的资源，以在下一个用于控制的帧的第一个时隙中进行下一次发送。通过交换资源预留信息，各个终端可以得知用于传输侧链路状态消息的资源的预留情况。
在一个示例中，对于传输侧链路状态消息的资源，无论采用哪种分配方式，都可以是分配一个资源集(resource set)。在该资源集中，可以进行重传(transmission repetition)或者基于波束的传输。
根据以上的描述，对于SL传输资源的调度，当由进行SL传输的终端自主地选择资源时，由于终端已经通过上述方法确定了可用的多跳链路，因此可以进行相应的资源选择。但在如图1A、1B所示的由第三方调度设备进行资源调度的情况下，由于调度设备还不知道可用的侧链路的情况，因此无法顺利地进行资源调度。
鉴于上述问题，根据本实施例的一个示例，方法300还可以进一步包括如下步骤：终端向调度设备(无线基站或者作为调度点的第三方终端)发送所确定的自身的侧链路状态消息。
根据本实施例的一个示例，由终端向调度设备发送的侧链路状态消息中，包含自身的ID信息以及链路终端表。
根据本实施例的一个示例，终端可以根据配置信息向调度设备发送自身的侧链路状态消息。具体而言，在一个V2X通信网络中，可以将处于设定的资源池/带域/载波/频率等之中的终端(预)设定为向调度设备发送侧链路状态消息的终端。
根据本实施例的一个示例，当在一个V2X通信网络中，进行SL资源调度的调度设备有多个时(例如，有多个第三方终端进行资源调度)，向每个调度设备发送侧链路状态消息。
根据本实施例的一个示例，终端可以向调度设备周期性地发送侧链路状态消息。并且，广播的周期可以被(预)设定。
根据本实施例的另一个示例，终端可以向调度设备非周期性地发送侧链路状态消息。具体而言，根据网络指示(network indication)或者网络配置(network configuration)来非周期性地进行广播发送。例如，可以根据侧链路状态消息的更新情况而非周期性地进行发送，即，每当终端基于接收到的其他终端的侧链路状态消息而更新自身的侧链路状态消息后，便向调度设备发送更新后的侧链路状态消息，否则不进行发送。
根据本实施例的一个示例，当调度设备为基站时，终端使用高层信令(例如，无线资源控制(Radio Resource Control，RRC)信令)在上行链路(Uplink)中向基站发送侧链路状态消息。
根据本实施例的另一个示例，当调度设备为其他终端时，终端使用高层信令(例如，类RRC(RRC-like)信令)在侧链路中向其他终端发送侧链路 状态消息。
根据本实施例的另一个示例，终端可以使用物理层信令向调度设备发送侧链路状态消息。
由此，根据上述步骤，调度设备(无线基站或者作为调度点的第三方终端)能够掌握V2X通信网络中可用的侧链路的情况，从而顺利地进行资源调度。
下面参照图7来描述根据本公开实施例的终端。图7是根据本公开实施例的终端700的结构示意图。如图7所示，终端700包括：接收单元710，接收来自其他终端的侧链路状态消息，该其他终端的侧链路状态消息包括所述其他终端的可用侧链路的信息。例如，其他终端的侧链路状态消息可包括该其他终端与终端700之间的链路信息，此外，还可包括该其他终端的除了与终端700之间的链路以外的可用侧链路的信息。此外，根据本公开的一个示例，每个终端的侧链路状态消息至少包括该终端的ID信息及该终端可用的1跳以上侧链路的信息。
终端700还包括处理单元720，基于所接收到的侧链路状态消息，确定所述终端的可用的多跳链路。除了这些单元以外，终端700还可以包括其他部件，然而，由于这些部件与本公开实施例的内容无关，因此在这里省略其图示和描述。
在一个示例中，接收单元700所接收的来自其他终端的侧链路状态消息中，包括该其他终端的ID信息以及该其他终端的可用的单跳链路的信息。假如以该其它终端作为发送端，则该单跳链路的信息例如是作为接收端的终端的ID信息。
处理单元720基于接收单元710所接收到的侧链路状态消息，确定终端700与上述作为接收点的终端之间的经由该其他终端的2跳侧链路是可用的。
在另一个示例中，接收单元710所接收的来自其他终端的侧链路状态消息中，包括该其他终端的ID信息以及该其他终端的可用的n跳链路的信息，同样地，处理单元720能够基于该侧链路状态消息确定终端700的一条以该所述其他终端为一个中间节点的n+1跳侧链路的可用性。
此外，根据上述实施例的一个示例，终端700还可以包括发送单元730，用于发送自身的侧链路状态消息，以便其他终端根据该侧链路状态消息确定 该其他终端的多跳链路。在该情况下，处理单元720确定自身的侧链路状态消息；发送单元730发送处理单元720所确定的终端700的侧链路状态消息，在一个示例中，采用广播的方式进行发送。
此外，进行上述广播发送的终端700可以是被(预)设定的。具体而言，在一个V2X通信网络中，可以将处于设定的资源池/带域/载波/频率等之中的终端(预)设定为进行广播发送的终端。
根据本公开的一个示例，处理单元720所要确定的侧链路状态消息包含终端700的ID信息以及终端700可用的侧链路的信息。具体而言，处理单元710通过将所确定的终端700的可用的侧链路中所经过每个终端的ID信息按顺序关联地写入侧链路状态消息中。
在一个例子中，终端700可用的侧链路的信息可以以终端链路表的形式来表现：
单跳终端 2跳终端 3跳终端
终端ID#0 终端ID#1 终端ID#3
终端ID#0 终端ID#2 终端ID#4
表3：终端700的链路终端表
在该表格中，表示了终端700的以下侧链路的可用性：与ID#0的终端进行单跳通信的链路；经由ID#0的终端而与ID#1的终端进行2跳通信的链路；经由ID#0的终端而与ID#2的终端进行2跳通信的链路；依次经由ID#0的终端和ID#1的终端而与ID#3的终端进行3跳通信的链路；依次经由ID#0的终端和ID#2的终端而与ID#4的终端进行3跳通信的链路。
在上述例子中，可以配置终端700可用的多跳链路的数量、每条多条链路的节点数量等，以避免终端需要维持的多条链路表格过于庞大，从而造成通信迟延等问题。例如，可以使链路终端表最多只记载5跳链路中的终端的ID信息。
需要注意的是，链路终端表仅为本公开的一个示例，只要可以表现侧链路的可用性，那么也可以不使用表格而使用其他任意的数据构成方式。
根据本发明的一个示例，每当接收单元710接收到来自其他终端的侧链路状态消息时，处理单元720就可基于其他终端的侧链路状态消息中包含的链路终端表来确定自身的可用的链路，并更新自身的链路终端表，并且可选 择地，发送单元730将包含指示该更新的自身链路终端表的侧链路状态消息进行发送。
在一个示例中，发送单元730广播发送的侧链路状态消息可以被周期性地发送。并且，广播发送的周期可以被(预)设定。参照图5具体说明该示例。
首先按照图5所示的方式划分时域上的资源，将时域资源划分为多个连续的间隔(interval)。被划分的间隔的长度可以被(预)设定，每个间隔的起点可以由一个偏移量来(预)设定。
接下来，进一步将每个间隔划分为用于控制(control)的时间段和用于服务(service)的时间段。可以将这两个时间段称为帧(frame)、子帧(subframe)、码元(symbol)、时隙(slot)、微时隙(mini-slot)等，以下为了说明的便利，分别将它们称为用于控制的帧和用于服务的帧。
用于控制的帧的起点也可以与上述间隔的起点重合，由此，如图5所示，用于控制的帧和用于服务的帧在时域上交替地连续。可以设为在用于控制的帧中发送侧链路状态消息，此时，侧链路状态消息被周期性地发送。
在用于控制的帧中，除了发送侧链路状态消息之外，还可以传输紧急信息传输(Emergency information)或者传输信令。所述紧急信息例如是表示车辆终端所遇到紧急情况的信息；所述信令例如是用于进行服务信道中的资源分配的信令。
此外，如图5所示，在一个示例中，用于控制的帧被划分为N个连续的时隙，在每个时隙中，广播发送侧链路状态消息。具体地，在一个相同的V2X通信网络中要进行侧链路状态消息交换的每个终端都被分配到一个时隙，终端在每个被分配的时隙中广播发送侧链路状态消息。因此，为了所有需要进行侧链路状态消息广播的终端都被分配到进行发送的时隙，时隙的个数N应当大于等于需要进行广播的终端的数量。
在一个示例中，用于控制的帧的长度可以被配置。例如，可以根据需要进行广播发送的终端的数量来配置用于控制的帧的长度，具体而言，在被划分的每个时隙长度确定的情况下，时隙的个数N随着在一个相同的V2X网络中要进行广播的终端的数量而变化，从而根据个数N来配置用于控制的帧的长度。
此外，在另一个示例中，发送单元730广播发送的侧链路状态消息也可以被非周期性的发送。具体而言，根据网络指示(network indication)或者网络配置(network configuration)来非周期性地进行广播发送。
接下来，说明如何分配用于发送侧链路状态消息的资源。当由第三方调度设备(无线基站以及其他终端)来调度SL资源时，也由该调度设备来分配用于传输侧链路状态消息的资源；而在由终端700自身来选择SL资源时，终端700自主地选择用于传输侧链路状态消息的资源，例如，可以在传输前进行基于竞争的资源选择。
结合图6说明在周期性发送侧链路状态消息的情况下，终端700自主地选择用于传输侧链路状态消息的资源的一种方式。
在图6中，在发送单元730发送自身可用的侧链路状态消息时，处理单元720预留本次用于发送侧链路状态消息的资源以用于下一次侧链路状态消息的发送。发送单元730可以将该预留信息与侧链路状态消息一起进行发送。如图6所示，发送单元730在用于控制的帧的第一个时隙中发送侧链路状态消息，处理单元730预留发送本次侧链路状态消息时所用的资源，以使发送单元730在下一个用于控制的帧的第一个时隙中进行下一次发送。通过交换资源预留信息，各个终端可以得知用于传输侧链路状态消息的资源的预留情况。
在一个示例中，对于传输侧链路状态消息的资源，无论采用哪种分配方式，都可以是分配一个资源集(resource set)。在该资源集中，可以进行重传(transmission repetition)或者基于波束的传输。
根据上述实施例的一个示例，发送单元730还可以向调度设备(无线基站或者作为调度点的第三方终端)发送所确定的自身的侧链路状态消息，以使调度设备基于终端700的可用侧链路信息而调度终端700的可用侧链路资源。
在一个示例中，由发送单元730向调度设备发送的侧链路状态消息中，包含终端700的ID信息以及链路终端表。
在一个示例中，终端700可以根据配置信息向调度设备发送自身的侧链路状态信息。具体而言，在一个V2X通信网络中，可以将处于设定的资源池 /带域/载波/频率等之中的终端(预)设定为向调度设备发送侧链路状态消息的终端。
在一个示例中，当在一个V2X通信网络中，进行SL资源调度的调度设备有多个时(例如，有多个第三方终端进行资源调度)，发送单元730向每个调度设备发送侧链路状态消息。
在一个示例中，发送单元730可以向调度设备周期性地发送侧链路状态消息。并且，广播的周期可以被(预)设定。
在另一个示例中，发送单元730可以向调度设备非周期性地发送侧链路状态消息。具体而言，根据网络指示(network indication)或者网络配置(network configuration)来非周期性地进行广播发送。例如，可以根据侧链路状态消息的更新情况而非周期性地进行发送，即，每当接收单元710基于接收到的其他终端的侧链路状态消息，处理单元720更新自身的侧链路状态消息后，发送单元730才向调度设备发送更新后的侧链路状态消息，否则不进行发送。
根据本实施例的一个示例，当调度设备为基站时，发送单元730使用高层信令(例如，无线资源控制(Radio Resource Control，RRC)信令)在上行链路(Uplink)中向基站发送侧链路状态消息。
根据本实施例的另一个示例，当调度设备为其他终端时，发送单元730使用高层信令(例如，类RRC(RRC-like)信令)在侧链路中向其他终端发送侧链路状态消息。
根据本实施例的另一个示例，发送单元730可以使用物理层信令向调度设备发送侧链路状态消息。
<硬件结构>
另外，上述实施例的说明中使用的框图示出了以功能为单位的块。这些功能块(结构单元)通过硬件和/或软件的任意组合来实现。此外，各功能块的实现手段并不特别限定。即，各功能块可以通过在物理上和/或逻辑上相结合的一个装置来实现，也可以将在物理上和/或逻辑上相分离的两个以上装置直接地和/或间接地(例如通过有线和/或无线)连接从而通过上述多个装置来实现。
例如，本公开的一个实施例的设备(比如终端等)可以作为执行本公开的无线通信方法的处理的计算机来发挥功能。图8是根据本公开的实施例的所涉及的设备800(终端)的硬件结构的示意图。上述的设备800(终端)可以作为在物理上包括处理器810、内存820、存储器830、通信装置840、输入装置850、输出装置860、总线870等的计算机装置来构成。
另外，在以下的说明中，“装置”这样的文字也可替换为电路、设备、单元等。终端的硬件结构可以包括一个或多个图中所示的各装置，也可以不包括部分装置。
例如，处理器810仅图示出一个，但也可以为多个处理器。此外，可以通过一个处理器来执行处理，也可以通过一个以上的处理器同时、依次、或采用其他方法来执行处理。另外，处理器810可以通过一个以上的芯片来安装。
设备800的各功能例如通过如下方式实现：通过将规定的软件(程序)读入到处理器810、内存820等硬件上，从而使处理器810进行运算，对由通信装置840进行的通信进行控制，并对内存820和存储器830中的数据的读出和/或写入进行控制。
处理器810例如使操作系统进行工作从而对计算机整体进行控制。处理器810可以由包括与周边装置的接口、控制装置、运算装置、寄存器等的中央处理器(CPU，Central Processing Unit)构成。例如，上述的处理单元等可以通过处理器810实现。
此外，处理器810将程序(程序代码)、软件模块、数据等从存储器830和/或通信装置840读出到内存820，并根据它们执行各种处理。作为程序，可以采用使计算机执行在上述实施方式中说明的动作中的至少一部分的程序。例如，终端700的处理单元可以通过保存在内存820中并通过处理器810来工作的控制程序来实现，对于其他功能块，也可以同样地来实现。
内存820是计算机可读取记录介质，例如可以由只读存储器(ROM，Read Only Memory)、可编程只读存储器(EPROM，Erasable Programmable ROM)、电可编程只读存储器(EEPROM，Electrically EPROM)、随机存取存储器(RAM，Random Access Memory)、其他适当的存储介质中的至少一个来构成。内存820也可以称为寄存器、高速缓存、主存储器(主存储装置)等。 内存820可以保存用于实施本公开的一实施方式所涉及的方法的可执行程序(程序代码)、软件模块等。
存储器830是计算机可读取记录介质，例如可以由软磁盘(flexible disk)、软(注册商标)盘(floppy disk)、磁光盘(例如，只读光盘(CD-ROM(Compact Disc ROM)等)、数字通用光盘、蓝光(Blu-ray，注册商标)光盘)、可移动磁盘、硬盘驱动器、智能卡、闪存设备(例如，卡、棒(stick)、密钥驱动器(key driver))、磁条、数据库、服务器、其他适当的存储介质中的至少一个来构成。存储器830也可以称为辅助存储装置。
通信装置840是用于通过有线和/或无线网络进行计算机间的通信的硬件(发送接收设备)，例如也称为网络设备、网络控制器、网卡、通信模块等。通信装置840为了实现例如频分双工(FDD，Frequency Division Duplex)和/或时分双工(TDD，Time Division Duplex)，可以包括高频开关、双工器、滤波器、频率合成器等。例如，上述的发送单元、接收单元等可以通过通信装置840来实现。
输入装置850是接受来自外部的输入的输入设备(例如，键盘、鼠标、麦克风、开关、按钮、传感器等)。输出装置860是实施向外部的输出的输出设备(例如，显示器、扬声器、发光二极管(LED，Light Emitting Diode)灯等)。另外，输入装置850和输出装置860也可以为一体的结构(例如触控面板)。
此外，处理器810、内存820等各装置通过用于对信息进行通信的总线870连接。总线870可以由单一的总线构成，也可以由装置间不同的总线构成。
此外，终端可以包括微处理器、数字信号处理器(DSP，Digital Signal Processor)、专用集成电路(ASIC，Application Specific Integrated Circuit)、可编程逻辑器件(PLD，Programmable Logic Device)、现场可编程门阵列(FPGA，Field Programmable Gate Array)等硬件，可以通过该硬件来实现各功能块的部分或全部。例如，处理器810可以通过这些硬件中的至少一个来安装。
(变形例)
另外，关于本说明书中说明的用语和/或对本说明书进行理解所需的用语，可以与具有相同或类似含义的用语进行互换。例如，信道和/或符号也可 以为信号(信令)。此外，信号也可以为消息。参考信号也可以简称为RS(Reference Signal)，根据所适用的标准，也可以称为导频(Pilot)、导频信号等。此外，分量载波(CC，Component Carrier)也可以称为小区、频率载波、载波频率等。
此外，本说明书中说明的信息、参数等可以用绝对值来表示，也可以用与规定值的相对值来表示，还可以用对应的其他信息来表示。例如，无线资源可以通过规定的索引来指示。进一步地，使用这些参数的公式等也可以与本说明书中明确公开的不同。
在本说明书中用于参数等的名称在任何方面都并非限定性的。例如，各种各样的信道(物理上行链路控制信道(PUCCH，Physical Uplink Control Channel)、物理下行链路控制信道(PDCCH，Physical Downlink Control Channel)等)和信息单元可以通过任何适当的名称来识别，因此为这些各种各样的信道和信息单元所分配的各种各样的名称在任何方面都并非限定性的。
本说明书中说明的信息、信号等可以使用各种各样不同技术中的任意一种来表示。例如，在上述的全部说明中可能提及的数据、命令、指令、信息、信号、比特、符号、芯片等可以通过电压、电流、电磁波、磁场或磁性粒子、光场或光子、或者它们的任意组合来表示。
此外，信息、信号等可以从上层向下层、和/或从下层向上层输出。信息、信号等可以经由多个网络节点进行输入或输出。
输入或输出的信息、信号等可以保存在特定的场所(例如内存)，也可以通过管理表进行管理。输入或输出的信息、信号等可以被覆盖、更新或补充。输出的信息、信号等可以被删除。输入的信息、信号等可以被发往其他装置。
信息的通知并不限于本说明书中说明的方式/实施方式，也可以通过其他方法进行。例如，信息的通知可以通过物理层信令(例如，下行链路控制信息(DCI，Downlink Control Information)、上行链路控制信息(UCI，Uplink Control Information))、上层信令(例如，无线资源控制(RRC，Radio Resource Control)信令、广播信息(主信息块(MIB，Master Information Block)、系统信息块(SIB，System Information Block)等)、媒体存取控制(MAC，Medium Access Control)信令)、其他信号或者它们的组合来实施。
另外，物理层信令也可以称为L1/L2(第1层/第2层)控制信息(L1/L2控制信号)、L1控制信息(L1控制信号)等。此外，RRC信令也可以称为RRC消息，例如可以为RRC连接建立(RRC Connection Setup)消息、RRC连接重设定(RRC Connection Reconfiguration)消息等。此外，MAC信令例如可以通过MAC控制单元(MAC CE(Control Element))来通知。
此外，规定信息的通知(例如，“为X”的通知)并不限于显式地进行，也可以隐式地(例如，通过不进行该规定信息的通知，或者通过其他信息的通知)进行。
关于判定，可以通过由1比特表示的值(0或1)来进行，也可以通过由真(true)或假(false)表示的真假值(布尔值)来进行，还可以通过数值的比较(例如与规定值的比较)来进行。
软件无论被称为软件、固件、中间件、微代码、硬件描述语言，还是以其他名称来称呼，都应宽泛地解释为是指命令、命令集、代码、代码段、程序代码、程序、子程序、软件模块、应用程序、软件应用程序、软件包、例程、子例程、对象、可执行文件、执行线程、步骤、功能等。
此外，软件、命令、信息等可以经由传输介质被发送或接收。例如，当使用有线技术(同轴电缆、光缆、双绞线、数字用户线路(DSL，Digital Subscriber Line)等)和/或无线技术(红外线、微波等)从网站、服务器、或其他远程资源发送软件时，这些有线技术和/或无线技术包括在传输介质的定义内。
本说明书中使用的“系统”和“网络”这样的用语可以互换使用。
在本说明书中，“基站(BS，Base Station)”、“无线基站”、“eNB”、“gNB”、“小区”、“扇区”、“小区组”、“载波”以及“分量载波”这样的用语可以互换使用。基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微小区、小小区等用语来称呼。
基站可以容纳一个或多个(例如三个)小区(也称为扇区)。当基站容纳多个小区时，基站的整个覆盖区域可以划分为多个更小的区域，每个更小的区域也可以通过基站子系统(例如，室内用小型基站(射频拉远头(RRH，Remote Radio Head)))来提供通信服务。“小区”或“扇区”这样的用语是指在该覆盖中进行通信服务的基站和/或基站子系统的覆盖区域的一部分或整体。
在本说明书中，“移动台(MS，Mobile Station)”、“用户终端(user terminal)”、“用户装置(UE，User Equipment)”以及“终端”这样的用语可以互换使用。移动台有时也被本领域技术人员以用户台、移动单元、用户单元、无线单元、远程单元、移动设备、无线设备、无线通信设备、远程设备、移动用户台、接入终端、移动终端、无线终端、远程终端、手持机、用户代理、移动客户端、客户端或者若干其他适当的用语来称呼。
此外，本说明书中的无线基站也可以用用户终端来替换。例如，对于将无线基站和用户终端间的通信替换为多个用户终端间(D2D，Device-to-Device)的通信的结构，也可以应用本公开的各方式/实施方式。此时，可以将上述的设备800中的第一通信设备或第二通信设备所具有的功能当作用户终端所具有的功能。此外，“上行”和“下行”等文字也可以替换为“侧”。例如，上行信道也可以替换为侧信道。
同样，本说明书中的用户终端也可以用无线基站来替换。此时，可以将上述的用户终端所具有的功能当作第一通信设备或第二通信设备所具有的功能。
在本说明书中，设为通过基站进行的特定动作根据情况有时也通过其上级节点(upper node)来进行。显然，在具有基站的由一个或多个网络节点(network nodes)构成的网络中，为了与终端间的通信而进行的各种各样的动作可以通过基站、除基站之外的一个以上的网络节点(可以考虑例如移动管理实体(MME，Mobility Management Entity)、服务网关(S-GW，Serving-Gateway)等，但不限于此)、或者它们的组合来进行。
本说明书中说明的各方式/实施方式可以单独使用，也可以组合使用，还可以在执行过程中进行切换来使用。此外，本说明书中说明的各方式/实施方式的处理步骤、序列、流程图等只要没有矛盾，就可以更换顺序。例如，关于本说明书中说明的方法，以示例性的顺序给出了各种各样的步骤单元，而并不限定于给出的特定顺序。
本说明书中说明的各方式/实施方式可以应用于利用长期演进(LTE，Long Term Evolution)、高级长期演进(LTE-A，LTE-Advanced)、超越长期演进(LTE-B，LTE-Beyond)、超级第3代移动通信系统(SUPER 3G)、高级国际移动通信(IMT-Advanced)、第4代移动通信系统(4G，4th generation mobile communication system)、第5代移动通信系统(5G，5th generation mobile  communication system)、未来无线接入(FRA，Future Radio Access)、新无线接入技术(New-RAT，Radio Access Technology)、新无线(NR，New Radio)、新无线接入(NX，New radio access)、新一代无线接入(FX，Future generation radio access)、全球移动通信系统(GSM(注册商标)，Global System for Mobile communications)、码分多址接入3000(CDMA3000)、超级移动宽带(UMB，Ultra Mobile Broadband)、IEEE 920.11(Wi-Fi(注册商标))、IEEE 920.16(WiMAX(注册商标))、IEEE 920.20、超宽带(UWB，Ultra-WideBand)、蓝牙(Bluetooth(注册商标))、其他适当的无线通信方法的系统和/或基于它们而扩展的下一代系统。
本说明书中使用的“根据”这样的记载，只要未在其他段落中明确记载，则并不意味着“仅根据”。换言之，“根据”这样的记载是指“仅根据”和“至少根据”这两者。
本说明书中使用的对使用“第一”、“第二”等名称的单元的任何参照，均非全面限定这些单元的数量或顺序。这些名称可以作为区别两个以上单元的便利方法而在本说明书中使用。因此，第一单元和第二单元的参照并不意味着仅可采用两个单元或者第一单元必须以若干形式占先于第二单元。
本说明书中使用的“判断(确定)(determining)”这样的用语有时包含多种多样的动作。例如，关于“判断(确定)”，可以将计算(calculating)、推算(computing)、处理(processing)、推导(deriving)、调查(investigating)、搜索(looking up)(例如表、数据库、或其他数据结构中的搜索)、确认(ascertaining)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，也可以将接收(receiving)(例如接收信息)、发送(transmitting)(例如发送信息)、输入(input)、输出(output)、存取(accessing)(例如存取内存中的数据)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，还可以将解决(resolving)、选择(selecting)、选定(choosing)、建立(establishing)、比较(comparing)等视为是进行“判断(确定)”。也就是说，关于“判断(确定)”，可以将若干动作视为是进行“判断(确定)”。
本说明书中使用的“连接的(connected)”、“结合的(coupled)”这样的用语或者它们的任何变形是指两个或两个以上单元间的直接的或间接的任何连接或结合，可以包括以下情况：在相互“连接”或“结合”的两个单元间，存在一个或一个以上的中间单元。单元间的结合或连接可以是物理上的，也可 以是逻辑上的，或者还可以是两者的组合。例如，“连接”也可以替换为“接入”。在本说明书中使用时，可以认为两个单元是通过使用一个或一个以上的电线、线缆、和/或印刷电气连接，以及作为若干非限定性且非穷尽性的示例，通过使用具有射频区域、微波区域、和/或光(可见光及不可见光这两者)区域的波长的电磁能等，被相互“连接”或“结合”。
在本说明书或权利要求书中使用“包括(including)”、“包含(comprising)”、以及它们的变形时，这些用语与用语“具备”同样是开放式的。进一步地，在本说明书或权利要求书中使用的用语“或(or)”并非是异或。
以上对本公开进行了详细说明，但对于本领域技术人员而言，显然，本公开并非限定于本说明书中说明的实施方式。本公开在不脱离由权利要求书的记载所确定的本公开的宗旨和范围的前提下，可以作为修改和变更方式来实施。因此，本说明书的记载是以示例说明为目的，对本公开而言并非具有任何限制性的意义。

Claims (10)

  1. 一种终端，包括：
    接收单元，接收来自其他终端的侧链路状态消息，所述其他终端的侧链路状态消息包括所述其他终端的可用侧链路的信息；以及
    处理单元，基于所接收到的侧链路状态消息，确定所述终端的可用多跳链路。
  2. 如权利要求1所述的终端，其中，
    每个终端的侧链路状态消息至少包括该终端的ID信息及该终端可用的1跳以上侧链路的信息。
  3. 如权利要求1或权利要求2所述的终端，其中，
    所述处理单元确定所述终端自身的侧链路状态消息，
    所述终端还包括：
    发送单元，发送所确定的所述终端自身的侧链路状态消息。
  4. 如权利要求3所述的终端，其中，
    所述发送单元在周期性出现的时间段中发送所述终端自身的侧链路状态消息。
  5. 如权利要求4所述的终端，其中，
    每个所述时间段被划分为多个时隙，
    所述发送单元在所述多个时隙之一中发送所述终端自身的侧链路状态消息。
  6. 如权利要求4所述的终端，其中，
    所述时间段的长度根据要相互交换侧链路状态消息的终端的数量而被配置。
  7. 如权利要求4所述的终端，其中，
    所述处理单元确定用于发送所述终端自身的侧链路状态消息的资源。
  8. 如权利要求3所述的终端，其中，
    所述发送单元向资源调度设备发送由所述处理单元确定的所述终端自身的侧链路状态消息。
  9. 如权利要求8所述的终端，其中，
    所述发送单元通过高层信令向资源调度设备发送所述终端自身的侧链路 状态消息。
  10. 一种由终端执行的方法，包括：
    接收来自其他终端的侧链路状态消息，所述侧链路状态消息至少包括所述其他终端的除了与所述终端之间的链路以外的可用的侧链路的信息；以及
    基于所接收到的侧链路状态消息，确定所述终端的可用的多跳链路。
PCT/CN2019/083059 2019-04-17 2019-04-17 终端以及由终端执行的方法 Ceased WO2020211014A1 (zh)

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