WO2015165355A1 - 一种时隙状态维护方法和装置 - Google Patents

一种时隙状态维护方法和装置 Download PDF

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Publication number
WO2015165355A1
WO2015165355A1 PCT/CN2015/077252 CN2015077252W WO2015165355A1 WO 2015165355 A1 WO2015165355 A1 WO 2015165355A1 CN 2015077252 W CN2015077252 W CN 2015077252W WO 2015165355 A1 WO2015165355 A1 WO 2015165355A1
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WIPO (PCT)
Prior art keywords
slot
node
state table
information
established
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PCT/CN2015/077252
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English (en)
French (fr)
Inventor
赵毅
赵丽
房家奕
冯媛
李凤
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电信科学技术研究院
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Publication of WO2015165355A1 publication Critical patent/WO2015165355A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a time slot state maintenance method and apparatus.
  • DSRC Dedicated Short Range Communications
  • the time slot resource allocation algorithm based on time slot reservation is a kind of resource allocation method that adopts time division multiplexing mode and can support car network DSRC communication, including reliable reservation ALOHA (Reliable Reserved ALOHA, RR-ALOHA), mobile sub-slot. ALOHA (Mobile Slotted Aloha, MS-ALOHA) and the like. Resource allocation is based on the frame structure in units of slots. As shown in FIG. 1, each N slots constitute one frame, and the slots in each frame are numbered from 0 to N-1, and are cyclically repeated between frames. The time slots herein may also be expressed in the standard or other literature as "subframes" and the like. At the same time, only one vehicle is allowed to transmit data per slot, that is, Time Division Multiplex (TDM) is used between vehicles.
  • TDM Time Division Multiplex
  • a node such as a vehicle-mounted terminal joins the network, it needs to first listen to the idle time slot resource within one frame time length, and then select one idle time slot as its own occupied time slot (ie, self-occupied time slot), if the node does not actively give up
  • the occupied time slot resources can always use the occupied time slots to transmit data, during which other nodes cannot use the time slots.
  • the node needs to periodically send Frame Information (FI), and the FI carries the number of hops that the node obtains from the node (such as the FI in the RR-ALOHA algorithm indicates the distance from the sending node).
  • FI Frame Information
  • the information about the occupancy status of each time slot includes: the time slot occupancy status and the temporary resource identifier (STI; also called the node identifier) corresponding to the node occupying the time slot.
  • STI temporary resource identifier
  • the priority status of the node occupying the time slot (which may also be considered as the priority corresponding to the data transmitted by the node occupying the time slot), as shown in FIG. 2 .
  • the slot occupancy status information can express the four occupancy states of the slot: 00
  • the slot is in an idle state, and 10 indicates that the time slot has been occupied by other nodes that are one hop away from the node (referred to as one-hop node) or the node is occupied, and 11 indicates that the time slot has been occupied by other nodes that are two hops away from the node.
  • 01 indicates that the time slot has been occupied by two or more other nodes, that is, the collision state; for the RR-ALOHA algorithm, although four kinds of time slot occupation status information can also be indicated, but for each The definition of the state is different from the MS-ALOHA algorithm.
  • each node can determine the range of adjacent hops by listening to the FI sent by the node of the adjacent one hop (for example, for the RR-ALOHA algorithm, it is within the range of two hops, for MS-
  • the ALOHA algorithm is a case in which each node occupies a time slot in the range of the adjacent three hops.
  • the time slot resource occupied by the node collides with the time slot resource used by other nodes, the time slot resource occupied by itself is released.
  • a new idle time slot is reserved as its own occupied time slot.
  • FI message The frame information (FI) sent by the node is called: FI message, and may also be simply referred to as FI;
  • the status information corresponding to each time slot indicated in the FI is called: the time slot information field corresponding to each time slot in the FI message;
  • the three types of information ie, slot occupancy status, STI, and priority information given in the occupancy status information corresponding to each time slot in the FI are respectively called: the time slots included in the slot information field of each slot. Occupied state subdomain, STI subdomain, and priority subdomain;
  • the first slot information field in the FI indicates the slot information corresponding to the slot of the FI transmission slot
  • the second slot information field indicates FI.
  • the time slot information corresponding to the previous time slot of the transmission time slot, and so on; when the system determines the absolute time reference point, the information fields of each time slot in the FI may be arranged in an agreed manner, such as the first time slot information in the FI.
  • the domain corresponds to slot 0.
  • the detection field corresponding to the time slot refers to the time slot information field corresponding to the time slot in the FI that is sent in the time slot.
  • the non-detection domain corresponding to the time slot refers to the time corresponding to the time slot in the FI that is not occupied by the time slot. Gap information field.
  • a vehicle node maintains the state of each slot within a frame length by a slot state table (or a slot state vector) (as shown in FIG. 3) when the vehicle
  • a slot state table or a slot state vector
  • the vehicle node When the sending time slot of the node (including the self-occupied time slot and the application time slot) arrives, the vehicle node generates and transmits the FI according to the state information of each time slot recorded in the time slot state table, and further, the vehicle needs to monitor the surrounding nodes to periodically send.
  • the FI and update the slot status table maintained by itself according to the FI sent by the surrounding vehicles, thereby obtaining the occupancy of each time slot within the current certain hop count range.
  • the vehicle node may maintain a plurality of slot state tables, such as each slot state table corresponding to a different transmission slot.
  • each node can reliably obtain the required slot resources periodically, and can ensure the fairness of the access channels of each node.
  • the vehicle node receives the FI sent by the other vehicle node, according to the content of the slot information field corresponding to each slot in the received FI, the slot information unit corresponding to each slot in the slot state table maintained by itself The content is updated, and the update method is as shown in FIG. 4.
  • the rate at which a node sends a message it is desirable to reduce the rate at which a node sends a message, to lengthen the period in which the node uses the time slot resource, and to multiplex the same time slot by multiple nodes to allow the system to accommodate more nodes.
  • the period of use of the slot resource needs to be able to support an integer multiple of the length of the basic slot resource maintenance period (eg, 100 milliseconds (ms)), while the existing slot state maintenance method based on the slot state table is applicable only to the system.
  • the slot state maintenance in the case where all nodes have the same transmission rate and match the slot state table maintenance period (that is, the period in which the node occupies the slot is equal to the maintenance period of the slot state table).
  • Embodiments of the present invention disclose a slot state maintenance method and apparatus to satisfy reliable slot resource allocation under different vehicle node densities, and support flexible message transmission rate changes.
  • the embodiment of the invention provides a method for maintaining a slot state, the method comprising:
  • the first node generates the first frame information FI, where the first FI carries indication information indicating a period in which the time slot is occupied;
  • the first node sends the generated first FI to other nodes on the time slot occupied by itself.
  • the method further includes: the first node receiving the second FI sent by the other node on the other time slots except the time slot occupied by the first node, where the second FI carries the time slot for indicating the time slot Indication information of the occupied period;
  • the first node updates the slot occupancy status currently maintained by itself according to the second FI.
  • the first node generates the first FI, including: the first node generates the first FI according to a slot state table used to represent a slot occupancy state currently maintained by itself.
  • the method further includes: the first node determining a maintenance period of its own slot state table according to a message sending rate;
  • the message sending rate includes a message sending rate of the first node, and/or a message sending rate of other nodes.
  • the first node generates the first FI, including:
  • the first node adds, in the slot information corresponding to each time slot in the first FI, indication information indicating a period in which the time slot is occupied; or
  • the first node adds, in the first FI, indication information indicating a period in which the time slot in which the first FI is sent is occupied; or
  • the first node adds indication information indicating a period in which each time slot is occupied in the first FI.
  • the first node adds, in the first FI, indication information indicating a period in which the time slot in which the first FI is sent is occupied, including:
  • the first node adds a new information field in the first FI, where the new information field includes indication information indicating a period in which the time slot in which the first FI is sent is occupied; or
  • the first node adds indication information indicating a period in which the time slot is occupied in the time slot information corresponding to the time slot in which the first FI is sent in the first FI; or
  • the first node carries a time slot occupation status sub-domain, a temporary resource identifier STI sub-domain, or a priority sub-domain in the slot information corresponding to the time slot in which the first FI is sent in the first FI.
  • the indication information indicating a period in which the time slot in which the first FI is transmitted is occupied.
  • the first node generates the first FI, including:
  • the first node determines that the number of timeslot information of the slot state table used to represent the slot occupancy state currently maintained by the first node is greater than the maximum number of timeslot information that the first FI can carry;
  • the first node divides its own slot state table into at least two segments, and the number of slot information in each segment is not greater than the number of slot information that the first FI can carry. Maximum value;
  • the first node generates a first FI according to time slot information included in one of the at least two segments on a time slot periodically occupied by the first node.
  • the first node generates a first FI according to the time slot information included in one of the at least two segments, and sends the first FI to the other nodes, including:
  • the first node carries the first prompt information for indicating a section corresponding to the slot information in the first FI that is sent this time in the first FI; or
  • the first node carries, in the first FI, first prompt information for indicating a section corresponding to slot information in the first FI that is currently transmitted, and a slot for indicating the first node.
  • Second prompt information of the number of sections divided by the state table; or,
  • the first node carries, in the first FI, first prompt information for indicating a section corresponding to slot information in the first FI that is currently transmitted, and a slot for indicating the first node.
  • the third prompt information of the maintenance period of the status table is a part of the status table.
  • the first node divides its own slot state table into at least two segments, including:
  • the first node determines, according to the number of timeslot information in its own slot state table and the number of timeslot information that can be included in a set single segment, that the slot state table can be divided by itself.
  • the first node divides each of the segments according to the set number of slot information that can be included in the set single segment in the slot state table of the first node.
  • the set time slot is:
  • the first time slot in the slot state table of the first node is the first time slot in the slot state table of the first node.
  • the method further includes: if a maintenance period of the slot state table of the first node changes, and The slot state table reset trigger condition is satisfied, the first node resets the content of the slot information in its own slot state table, and updates the maintenance period of its own slot state table.
  • the first node updates the time slot occupation status currently maintained by the first node according to the second FI, including:
  • the first node determines, according to the received second FI, that the number of timeslot information carried in the second FI is greater than a slot state table that is established by itself to represent the current occupied slot state of the slot.
  • the number of time slot information, or the range of time slot information that needs to be updated exceeds the range of time slot information that can be maintained by the established time slot state table;
  • the first node is a slot state table that has been established by itself, and at least one extended slot state table is created;
  • the first node updates its established slot state table and/or the extended slot state table corresponding to the established slot state table according to the received slot information carried in the second FI.
  • the extended slot state table satisfies at least one of the following conditions:
  • the number of timeslot information included in the extended slot state table is a positive integer multiple of the number of timeslot information included in the established slot state table
  • Each slot information in the extended slot state table includes indication information indicating a period in which the slot corresponding to the slot information is occupied;
  • the format of the slot information in the extended slot state table is the same as the format of the slot information in the established slot state table.
  • the first node determines, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the established time slot state table:
  • the slot information carried in the second FI for indicating that the current FI is carried in the second FI corresponds to the first hint information of the section included in the slot state table of the node that sends the second FI.
  • the first node determines a maintenance period of the slot state table of the node that sends the second FI, including:
  • the first node according to the first prompt information carried in the received second FI, and the second prompt information used to indicate the number of segments divided by the slot state table of the node that sends the second FI, Determining to send the second FI The maintenance period of the slot's status table of the node.
  • the first node updates its established slot state table and/or the extended slot state corresponding to the established slot state table according to the received slot information carried in the second FI.
  • Table including:
  • the first node updates the established slot state table according to the content of the slot information included in the second FI that does not exceed the range of slot information that can be maintained by the slot state table that has been established by itself. ;as well as,
  • the first node updates the established slot state table according to the content of the slot information included in the second FI that exceeds the range of slot information that can be maintained by the slot state table that has been established by itself. Corresponding extended slot status table.
  • the first node updates its own established slot state table and/or the extended slot state table corresponding to the established slot state table, including:
  • the first node according to the content of each time slot information carried in the second FI, to receive the time slot status table of the second FI in its own established time slot status table and/or the established time
  • the corresponding position in the extended slot state table corresponding to the slot state table is a starting point forward or backward, and sequentially updates its established slot state table and/or the extended slot corresponding to the established slot state table.
  • State table or,
  • the slot information of the slot occupied state subfield indicating that the slot is occupied according to the content of each slot information carried in the second FI, and according to the determined slot information
  • the content of the slot in which the second FI is received is in the slot state table that has been established by itself and/or the corresponding position in the extended slot state table corresponding to the established slot state table is used as a starting point. Pre- or backward, the self-established slot state table and/or the extended slot state table corresponding to the established slot state table are updated.
  • the method further includes: when the established slot state table satisfies a slot state table reset trigger condition, the first node resets the established slot state table, and The content of the slot information included in the extended slot state table corresponding to the established slot state table is updated to the slot information included in the reset slot state table after the reset.
  • the slot state table resets the triggering condition, including: after the first node completes the sending of the data packet in the time slot occupied by itself, triggering the reset of the slot state table of the first node; or, the first node After the occupied time slot collides with the time slot occupied by other nodes, triggering the reset of its own time slot status table; or, when there is no data packet sent in the buffer for storing the data packet in the first node, triggering itself Reset of the slot status table; or, when the message transmission rate of the first node changes, triggering reset of its own slot status table.
  • the embodiment of the invention further provides a method for maintaining a slot state, the method comprising:
  • the first node receives the second FI sent by the other node on the other time slots except the time slot occupied by the first node, where the second FI carries the indication information indicating the period in which the time slot is occupied;
  • the first node updates the slot occupancy status currently maintained by itself according to the second FI.
  • the first node updates the time slot occupation status currently maintained by the first node according to the second FI, including:
  • the first node determines, according to the received second FI, that the number of timeslot information carried in the second FI is greater than a slot state table that is established by itself to represent the current occupied slot state of the slot.
  • the number of time slot information, or the range of time slot information that needs to be updated exceeds the range of time slot information that can be maintained by the established time slot state table;
  • the first node is a slot state table that has been established by itself, and at least one extended slot state table is created;
  • the first node updates its established slot state table and/or the extended slot state table corresponding to the established slot state table according to the received slot information carried in the second FI.
  • the extended slot state table satisfies at least one of the following conditions:
  • the number of timeslot information included in the extended slot state table is a positive integer multiple of the number of timeslot information included in the established slot state table
  • Each slot information in the extended slot state table includes indication information indicating a period in which the slot corresponding to the slot information is occupied;
  • the format of the slot information in the extended slot state table is the same as the format of the slot information in the established slot state table.
  • the first node determines, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the established time slot state table:
  • the slot information carried in the second FI for indicating that the current FI is carried in the second FI corresponds to the first hint information of the section included in the slot state table of the node that sends the second FI.
  • the first node determines a maintenance period of a slot state table of a node that sends the second FI, including:
  • the first node according to the first prompt information carried in the received second FI, and the second prompt information used to indicate the number of segments divided by the slot state table of the node that sends the second FI, Determining a maintenance period of a slot state table of a node transmitting the second FI.
  • the first node updates the established slot state table and/or the extended slot state table corresponding to the established slot state table according to the received slot information carried in the second FI, including :
  • the first node updates the established slot state table according to the content of the slot information included in the second FI that does not exceed the range of slot information that can be maintained by the slot state table that has been established by itself. ;as well as,
  • the first node updates the established slot state table according to the content of the slot information included in the second FI that exceeds the range of slot information that can be maintained by the slot state table that has been established by itself. Corresponding extended slot status table.
  • the first node updates its own established slot state table and/or the extended slot state table corresponding to the established slot state table, including:
  • the first node according to the content of each time slot information carried in the second FI, to receive the time slot status table of the second FI in its own established time slot status table and/or the established time
  • the corresponding position in the extended slot state table corresponding to the slot state table is a starting point forward or backward, and sequentially updates its established slot state table and/or the extended slot corresponding to the established slot state table.
  • State table or,
  • the slot information of the slot occupied state subfield indicating that the slot is occupied according to the content of each slot information carried in the second FI, and according to the determined slot information
  • the content of the slot in which the second FI is received is in the slot state table that has been established by itself and/or the corresponding position in the extended slot state table corresponding to the established slot state table is used as a starting point. Pre- or backward, the self-established slot state table and/or the extended slot state table corresponding to the established slot state table are updated.
  • the method further includes: when the established slot state table satisfies a slot state table reset trigger condition, the first node resets the established slot state table, and The content of the slot information included in the extended slot state table corresponding to the established slot state table is updated to the slot information included in the reset slot state table after the reset.
  • the present invention provides a time slot state maintenance device, which is applied to any node device (ie, a first node) in a car network system, the device comprising:
  • a first processing module configured to generate first frame information FI, where the first FI carries indication information indicating a period in which the time slot is occupied;
  • the sending module is configured to send the first FI generated by the first processing module to other nodes on a time slot occupied by the first node to which the node belongs.
  • the apparatus further includes: a receiving module, receiving, on a time slot other than a time slot occupied by the first node to which the first node belongs, receiving a second FI sent by another node, where the second FI carries Instructing information indicating a period in which the time slot is occupied;
  • a second processing module configured to update a time slot occupation status currently maintained by the first node according to the second FI received by the receiving module.
  • the first processing module is specifically configured to: generate the first FI according to a slot state table used to represent a slot occupancy state currently maintained by the first node.
  • the first processing module is further configured to: determine a maintenance period of the slot state table of the first node according to a message sending rate, where the message sending rate includes a message sending rate of the first node, And/or the message sending rate of other nodes.
  • the first processing module is specifically configured to: add, according to the time slot information corresponding to each time slot in the first FI, indication information indicating a period in which the time slot is occupied; or Adding indication information indicating a period in which the time slot in which the first FI is transmitted is added to the first FI; or adding an indication indicating a period in which each time slot is occupied in the first FI information.
  • the first processing module is specifically configured to: add a new information field in the first FI, where the new information field includes indication information indicating a period in which the time slot in which the first FI is sent is occupied; Or the indication information indicating the period in which the time slot is occupied is added to the time slot information corresponding to the time slot in which the first FI is sent in the first FI; or, in the first FI
  • the slot occupation state sub-domain, the STI sub-domain, or the priority sub-domain in the slot information corresponding to the slot in which the first FI is sent carries a period indicating that the slot in which the first FI is sent is occupied. Instructions.
  • the first processing module is specifically configured to: determine that the number of timeslot information of the slot state table used to represent the slot occupation status currently maintained by the first node is greater than the first FI. a maximum value of the number of timeslot information that can be carried; dividing the slot state table of the first node into at least two segments, and the number of slot information in each segment is not greater than the number a maximum value of the number of timeslot information that can be carried by a FI; and time slot information included in one of the at least two segments on a time slot periodically occupied by the first node , generating the first FI.
  • the first processing module is configured to: carry, in the first FI, first prompt information that is used to indicate a section corresponding to the slot information in the first FI that is sent this time; or, in the first The FI carries first prompt information indicating a section corresponding to slot information in the first FI that is transmitted this time, and a number indicating a section divided by the slot state table of the first node. a second prompt information; or, in the first FI, carrying first prompt information indicating a section corresponding to slot information in the first FI that is currently transmitted, and indicating the first node
  • the third prompt information of the maintenance period of the slot state table is configured to: carry, in the first FI, first prompt information that is used to indicate a section corresponding to the slot information in the first FI that is sent this time; or, in the first The FI carries first prompt information indicating a section corresponding to slot information in the first FI that is transmitted this time, and a number indicating a section divided by the slot state table of the first node.
  • the first processing module is specifically configured to: determine, according to the number of timeslot information in the slot state table of the first node, and the number of timeslot information that can be included in the set single segment. And the number of the segments that can be divided by the slot state table currently maintained by the first node; and, in the slot state table of the first node, starting with the set time slot, according to the setting The number of time slot information that can be included in a given single segment is divided into each of the segments.
  • the first processing module is further configured to: if the maintenance period of the slot state table of the first node changes, and meet the slot state table reset trigger condition, reset the time slot of the first node The content of the slot information in the status table, and updating the maintenance period of the slot status table of the first node.
  • the second processing module is specifically configured to: determine, according to the received second FI, the first The number of timeslot information carried in the second FI is greater than the number of timeslot information of the slot state table that has been established by the first node, or the range of time slot information that needs to be updated exceeds that the first node has been established. a range of time slot information that can be maintained by the slot state table; for the slot state table that has been established by the first node, at least one extended slot state table is created; and according to the received time slot carried in the second FI And updating the slot state table that is established by the first node and/or the extended slot state table corresponding to the established slot state table.
  • the second processing module determines, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the time slot state table established by the first node:
  • the slot information carried in the second FI for indicating that the current FI is carried in the second FI corresponds to the first hint information of the section included in the slot state table of the node that sends the second FI.
  • the second processing module determines a maintenance period of the slot state table of the node that sends the second FI, including: according to the received time slot carried in the second FI, indicating a node that sends the second FI a third prompt information of the maintenance period of the state table, determining a maintenance period of the slot state table of the node that sends the second FI; or, according to the first prompt information carried in the received second FI, and for indicating Sending, by the second prompt information, the number of the segments divided by the slot state table of the node of the second FI, determining a maintenance period of the slot state table of the node transmitting the second FI.
  • the second processing module is specifically configured to: according to the content of the time slot information included in the second FI that does not exceed the range of time slot information that can be maintained by the slot state table established by the first node Updating the established slot state table; and, according to the slot information included in the second FI, exceeding a range of slot information maintainable by the slot state table established by the first node And updating the extended slot state table corresponding to the established slot state table.
  • the second processing module is specifically configured to: according to the content of each time slot information carried in the second FI, to receive the time slot status table of the time slot of the second FI that is established in the first node And/or the corresponding position in the extended slot state table corresponding to the established slot state table is a starting point forward or backward, and sequentially updating the established slot state table and/or the first node.
  • a time slot to the second FI in a slot state table that has been established by the first node and/or a corresponding position in an extended slot state table corresponding to the established slot state table is a starting point forward Or backward, updating the slot state table and/or the already established slot state of the first node An extended slot state table corresponding to the established slot state table.
  • the second processing module is further configured to: when the established slot state table satisfies the slot state table reset trigger condition, reset the established slot state table, and The content of the slot information included in the extended slot state table corresponding to the established slot state table is updated to the slot information included in the reset slot state table after the reset.
  • the present invention also provides a time slot state maintenance device, which is applied to any node device (ie, a first node) of a car network system, the device comprising:
  • the receiving module receives the second FI sent by the other node in a time slot other than the time slot occupied by the first node to which the first node belongs, where the second FI carries a period indicating that the time slot is occupied.
  • a second processing module configured to update a time slot occupation status currently maintained by the first node according to the second FI received by the receiving module.
  • the second processing module is configured to: determine, according to the received second FI, that the number of timeslot information carried in the second FI is greater than the time slot state table that is established by the first node.
  • the number of timeslot information, or the range of time slot information to be updated exceeds the range of time slot information that can be maintained by the slot state table established by the first node; a status table, creating at least one extended time slot status table; and updating the established time slot status table of the first node and/or the established time slot according to the received time slot information carried in the second FI
  • the extended slot status table corresponding to the status table.
  • the second processing module determines, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the time slot state table established by the first node:
  • the slot information carried in the second FI for indicating that the current FI is carried in the second FI corresponds to the first hint information of the section included in the slot state table of the node that sends the second FI.
  • the second processing module determines a maintenance period of the slot state table of the node that sends the second FI, including: according to the received time slot carried in the second FI, indicating a node that sends the second FI a third prompt information of the maintenance period of the state table, determining a maintenance period of the slot state table of the node that sends the second FI; or, according to the first prompt information carried in the received second FI, and for indicating Sending, by the second prompt information, the number of the segments divided by the slot state table of the node of the second FI, determining a maintenance period of the slot state table of the node transmitting the second FI.
  • the second processing module is specifically configured to: according to the second FI, not exceeding the first node The content of the slot information in the range of the slot information that can be maintained by the established slot state table, updating the established slot state table; and, according to the second FI, exceeding the number The content of the slot information in the range of the slot information that can be maintained by the established slot state table of a node updates the extended slot state table corresponding to the established slot state table.
  • the second processing module is specifically configured to: according to the content of each time slot information carried in the second FI, to receive the time slot status table of the time slot of the second FI that is established in the first node And/or the corresponding position in the extended slot state table corresponding to the established slot state table is a starting point forward or backward, and sequentially updating the established slot state table and/or the first node.
  • a time slot to the second FI in a slot state table that has been established by the first node and/or a corresponding position in an extended slot state table corresponding to the established slot state table is a starting point forward Or backward, updating the slot state table that has been established by the first node and/or the extended slot state table corresponding to the established slot state table.
  • the second processing module is further configured to: when the established slot state table satisfies the slot state table reset trigger condition, reset the established slot state table, and The content of the slot information included in the extended slot state table corresponding to the established slot state table is updated to the slot information included in the reset slot state table after the reset.
  • a node device ie, a first node
  • the first node is any node device (such as an in-vehicle device) in an in-vehicle communication system, where the first node includes at least one processor, and At least one processor connected transmitter, wherein:
  • the processor is configured to generate a first FI, the first FI carrying indication information indicating a period in which the time slot is occupied.
  • the transmitter is configured to transmit the first FI generated by the processor to other nodes on a time slot occupied by the first node to which it belongs.
  • the processor is configured to: generate a first FI according to a slot state table for characterizing a slot occupancy status currently maintained by the first node to which the first node belongs.
  • the processor is further configured to: determine, according to the message sending rate, a maintenance period of the slot state table of the first node to which the UE belongs; wherein the message sending rate includes a message sending rate of the first node to which the node belongs And/or the message sending rate of other nodes.
  • the processor is configured to: add, in the slot information corresponding to each time slot in the first FI, indication information indicating a period in which the time slot is occupied; or The indication information indicating the period in which the time slot in which the first FI is transmitted is added is added to an FI; or the indication information indicating the period in which each time slot is occupied is added to the first FI.
  • the processor is configured to: add a new information field in the first FI, where the new information field includes indication information indicating a period in which the time slot in which the first FI is sent is occupied; or The indication information indicating the period in which the time slot is occupied is added to the time slot information corresponding to the time slot in which the first FI is sent in the FI; or the time slot in the first FI for transmitting the first FI is corresponding to The slot occupancy status sub-domain, the STI sub-domain, or the priority sub-domain in the slot information carries indication information indicating a period in which the slot in which the first FI is transmitted is occupied.
  • the processor is configured to: determine, by the first FI, that the number of timeslot information used to identify the slot state table currently maintained by the first node to which the first node belongs is greater than the first FI The maximum number of timeslot information that can be carried; dividing the slot state table of the first node into at least two segments, and the number of timeslot information in each segment is not greater than that of the first FI Generating a maximum number of times of slot information; and generating, on a time slot periodically occupied by the first node, a first FI according to time slot information included in one of the at least two segments .
  • the processor is configured to: carry the first prompt information for indicating the section corresponding to the time slot information in the first FI that is sent this time in the first FI; or carry it in the first FI a first prompt information indicating a section corresponding to the slot information in the first FI transmitted this time, and a second prompt indicating the number of sections divided by the slot state table of the first node to which the UE belongs.
  • Information or, in the first FI, carrying first hint information for indicating a section corresponding to slot information in the first FI that is currently transmitted, and a slot state table for indicating the first node to which the UE belongs The third prompt message of the maintenance cycle.
  • the processor is configured to divide the slot state table of the first node to which it belongs into at least two segments according to the following manner: according to the slot information in the slot state table of the first node to which the user belongs And the number of timeslot information that can be included in a single segment that is set, determining the number of segments that can be divided by the slot state table currently maintained by the first node; and, at the first node In the slot state table, each segment is divided according to the number of slot information that can be included in the set single segment, starting from the set slot.
  • the processor is configured to: if the maintenance period of the slot state table of the first node to which it belongs belongs changes, and meet the slot state table reset trigger condition, reset the time slot of the first node. The content of the slot information in the status table, and updating the maintenance period of the slot status table of the first node.
  • the node device provided by the embodiment of the present invention further includes:
  • a receiver connected to the processor, configured to receive a second FI sent by another node on a time slot other than a time slot occupied by the first node to which the user belongs, wherein the second FI carries Indication information indicating a period in which a time slot is occupied;
  • the processor is further configured to: update the slot state table for characterizing the slot occupancy status currently maintained by the first node to which the UE belongs, based on the second FI received by the receiver.
  • the processor is configured to: if the number of timeslot information carried in the second FI received by the receiver is greater than the time slot information of the slot state table established by the first node to which the first node belongs Or, according to the second FI received by the receiver, determining that the range of the slot information that needs to be updated exceeds the established slot of the first node to which it belongs.
  • the range of time slot information that can be maintained by the state table is the time slot state table that the first node that the user belongs to, and at least one extended time slot state table is created; and according to the time that is carried in the second FI received by the receiver
  • the slot information updates the slot state table established by the first node to which it belongs and/or the extended slot state table corresponding to the established slot state table.
  • the processor is configured to determine, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the time slot state table established by the first node:
  • the first node to which the first node belongs receives the location information of the time slot of the second FI;
  • the slot information carried in the second FI carried in the second FI for indicating the current FI corresponds to the first hint information of the section included in the slot state table of the node transmitting the second FI.
  • the processor determines a maintenance period of the slot state table of the node that sends the second FI, including: according to the slot state table carried in the second FI that is received by the receiver, indicating the node that sends the second FI a third prompt information of the maintenance period, determining a maintenance period of the slot state table of the node that sends the second FI; or, according to the first prompt information carried in the second FI received by the receiver, and for indicating sending
  • the second prompt information of the number of the segments divided by the slot state table of the node of the second FI determines the maintenance period of the slot state table of the node transmitting the second FI.
  • the processor is configured to: specifically, according to the content of the time slot information included in the second FI that does not exceed the range of time slot information that can be maintained by the slot state table established by the first node to which the first node belongs, Updating the established slot state table; and updating the established according to the content of the slot information included in the second FI that exceeds the range of slot information maintainable by the slot state table established by the first node
  • the extended slot status table corresponding to the slot status table.
  • the processor is configured to: according to the content of each time slot information carried in the second FI, the time slot status table that the receiver receives the second FI time slot at the first node to which the UE belongs And/or the corresponding position in the extended slot state table corresponding to the established slot state table is a starting point forward or backward, sequentially updating the established slot state table of the first node and/or the established The extended slot status table corresponding to the slot status table; or
  • the processor is further configured to: when the established slot state table satisfies the slot state table reset trigger condition, reset the established slot state table, and set the established slot The content of the slot information included in the extended slot status table corresponding to the status table is updated to the slot information included in the reset established slot status table.
  • the present invention also provides a node device (ie, a first node), which is any one of the in-vehicle communication systems a node device, the first node comprising a receiver and at least one processor coupled to the receiver, wherein:
  • the receiver is configured to receive a second FI sent by another node on a time slot other than the time slot occupied by the first node to which the first node belongs, wherein the second FI carries a time slot for indicating Indication information of the occupied period;
  • the processor is further configured to: update the slot state table for characterizing the slot occupancy status currently maintained by the first node to which the UE belongs, based on the second FI received by the receiver.
  • the processor is configured to: if the number of timeslot information carried in the second FI received by the receiver is greater than the time slot information of the slot state table established by the first node to which the first node belongs Or, according to the second FI received by the receiver, determining that the range of the slot information to be updated exceeds the range of the slot information that can be maintained by the slot state table established by the first node to which it belongs,
  • the first node has an established slot state table, creates at least one extended slot state table; and updates the established time slot of the first node to which the UE belongs according to the slot information carried in the second FI received by the receiver A status table and/or an extended slot status table corresponding to the established slot status table.
  • the processor is configured to determine, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the time slot state table established by the first node:
  • the first node to which the first node belongs receives the location information of the time slot of the second FI;
  • the slot information carried in the second FI carried in the second FI for indicating the current FI corresponds to the first hint information of the section included in the slot state table of the node transmitting the second FI.
  • the processor determines a maintenance period of the slot state table of the node that sends the second FI, including: according to the slot state table carried in the second FI that is received by the receiver, indicating the node that sends the second FI a third prompt information of the maintenance period, determining a maintenance period of the slot state table of the node that sends the second FI; or, according to the first prompt information carried in the second FI received by the receiver, and for indicating sending
  • the second prompt information of the number of the segments divided by the slot state table of the node of the second FI determines the maintenance period of the slot state table of the node transmitting the second FI.
  • the processor is configured to: specifically, according to the content of the time slot information included in the second FI that does not exceed the range of time slot information that can be maintained by the slot state table established by the first node to which the first node belongs, Updating the established slot state table; and updating the established according to the content of the slot information included in the second FI that exceeds the range of slot information maintainable by the slot state table established by the first node
  • the extended slot status table corresponding to the slot status table.
  • the processor is configured to: according to the content of each time slot information carried in the second FI, the time slot status table that the receiver receives the second FI time slot at the first node to which the UE belongs And/or the corresponding position in the extended slot state table corresponding to the established slot state table is a starting point forward or backward, sequentially updating the established slot state table of the first node and/or the established The extended slot status table corresponding to the slot status table; or
  • the receiver 203 receives the time slot status table of the time slot of the second FI that belongs to the first node to which the UE belongs, and/or the Updating the corresponding position in the extended slot state table corresponding to the established slot state table as the starting point forward or backward, updating the established slot state table of the first node and/or the established slot state table Corresponding extended slot status table.
  • the processor is further configured to: when the established slot state table satisfies the slot state table reset trigger condition, reset the established slot state table, and set the established slot The content of the slot information included in the extended slot status table corresponding to the status table is updated to the slot information included in the reset established slot status table.
  • the slot state maintenance method and apparatus can correctly detect the slot occupancy information of the one-hop node and the two-hop node that the first node perceives when the period of the slot occupied by different nodes is different.
  • the delivery to the surrounding nodes supports the transmission of road safety messages in different vehicle density scenarios.
  • FIG. 1 is a schematic diagram of a frame structure provided in the background art
  • FIG. 2 is a schematic structural diagram of frame information FI provided in the background art
  • FIG. 3 is a schematic structural diagram of a slot state vector (table) provided in the background art
  • FIG. 4 is a schematic diagram of an update manner of a slot state vector (table) provided in the background art
  • FIG. 5 is a schematic diagram of a method for maintaining a slot state according to the present invention.
  • FIG. 6 is a schematic diagram of a method for partitioning a slot state table according to the present invention.
  • FIG. 7 is a schematic diagram of a variable length slot state table maintained by a node A according to Embodiment 1 of the present invention.
  • FIG. 8 is a schematic diagram of time slot information included in a segment 1 of a variable length slot state table maintained by a node A according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram of a variable length slot state table maintained by a node D according to Embodiment 2 of the present invention.
  • FIG. 10 is a schematic diagram of a variable length slot state table maintained by a node D according to Embodiment 2 of the present invention.
  • FIG. 11 is a schematic diagram showing the timing relationship of a slot state table maintained by each node in Embodiment 2 according to the present invention.
  • FIG. 12 is a schematic diagram of an extended slot state table created by a node D in Embodiment 2 of the present invention.
  • FIG. 13 is a schematic diagram of an extended slot state table after node D is updated in Embodiment 2 of the present invention.
  • FIG. 14 is a schematic diagram of a variable length slot state table maintained by a node D in a third embodiment of the present invention.
  • 16 is a schematic diagram of another method for maintaining a slot state according to the present invention.
  • FIG. 17 is a schematic diagram of a first time slot state maintenance apparatus provided by the present invention.
  • FIG. 18 is a schematic diagram of a second time slot state maintenance apparatus provided by the present invention.
  • FIG. 19 is a schematic diagram of a third time slot state maintenance apparatus provided by the present invention.
  • FIG. 20 is a schematic diagram of a first node device provided by the present invention.
  • 21 is a schematic diagram of a second node device provided by the present invention.
  • FIG. 22 is a schematic diagram of a third node device provided by the present invention.
  • the embodiment of the present invention provides a method for maintaining a time slot state, which is applied to an in-vehicle communication system. Referring to FIG. 5, the method includes:
  • Step 51 The first node generates a first FI, where the first FI carries indication information indicating a period in which the time slot is occupied.
  • Step 52 The first node sends the first FI generated by itself to other nodes in the time slot occupied by the first node.
  • a noun such as "first node” is used for convenience of explanation, and the first node refers to any node (such as an in-vehicle terminal or the like) in the in-vehicle communication system.
  • the first node occupies at least one time slot in the frame for sending a message to other nodes, and the first node does not need to send the first FI to other nodes when each time slot occupied by the first node arrives, but may The first FI is transmitted on a part of the time slot occupied by itself.
  • the first node periodically occupies a time slot, which may be a frame period (for example, 100 ms), or may be a maintenance period of a slot state table for characterizing the current occupied slot occupancy state, and the like.
  • a time slot which may be a frame period (for example, 100 ms), or may be a maintenance period of a slot state table for characterizing the current occupied slot occupancy state, and the like.
  • the time slot status table is used to describe the current time slot occupied state of the first node as an example, but the embodiment of the present invention is not limited to the manner of using the time slot status table.
  • the time slot occupied state currently maintained by the first node may also be used to represent the current occupied slot occupancy state of the first node.
  • the first node generates the first FI, and sends the first FI generated by itself to the other node in the time slot occupied by the first node, where the first FI is carried to indicate that the time slot is occupied.
  • the indication of the cycle Therefore, in a case where different nodes occupy different time slots, the first node can accurately transmit the slot occupancy information of the one-hop node and the two-hop node that is perceived by the first node to the surrounding nodes, and support the roads in different vehicle density scenarios.
  • the sending of security messages is possible.
  • the first FI carries the indication information indicating the period in which the time slot is occupied, and/or the content in the second FI that carries the indication information indicating the period in which the time slot is occupied may be a time slot.
  • the occupied period information may also be the rate at which the node occupying the time slot transmits traffic on the time slot.
  • the content of the indication information corresponding to the time slot 6 may be 200 ms;
  • the correspondence between the transmission rate of different types of services and the period in which the time slots are occupied is set.
  • the content of the indication information corresponding to the time slot 8 The rate at which the Node B can send real-time traffic at time slot 8.
  • step 51 is specifically: the first node is configured according to a time slot occupation state used for characterizing its current maintenance.
  • the slot status table generates a first FI.
  • the method further includes: the first node determines a maintenance period of its own slot state table according to the message sending rate, and maintains its own slot state table according to the determined maintenance period.
  • the number of slot information included in the slot state table is also determined, for example, the time of the first node.
  • the maintenance period of the slot state table is 200 ms, and the slot length is 1 ms.
  • the slot state table of the first node includes slot information corresponding to 200 slots.
  • each slot information in the slot state table maintained by the first node includes an indication indicating a period in which the slot corresponding to the slot information is occupied.
  • Information such as adding a "occupancy cycle" sub-unit, is used to indicate the period in which each time slot is occupied.
  • the content of the indication information included in each time slot information in the time slot status table may be the period information in which the time slot is occupied, or the rate at which the node occupying the time slot transmits the service on the time slot.
  • the maintenance period of the slot state table determined by different nodes may also be different.
  • the number of timeslot information included in the slot state table of different nodes may also be different.
  • the slot state table maintained by each node can support time-varying slot resource reservations.
  • the first node determines the maintenance period of its slot state table according to the message sending rate, including the following three methods:
  • the first node determines the maintenance period of its own slot state table according to its current message sending rate.
  • the first node first determines the sending period of the message sent by itself according to the current message sending rate, and then determines the maintenance period of the slot state table according to the determined sending period. At this time, the first node The maintenance period of the slot status table is the same as the transmission period of the self-sending message.
  • the first node determines the maintenance period of its own slot state table according to the message sending rate of the other node, wherein the first node determines the message sending rate of the other node according to the received message sent by the other node.
  • the first node first determines the sending period of the message sent by the other node according to the message sent by other nodes (such as the node in the one-hop range), and then determines the self according to the sending period of the sending message of the other node.
  • the maintenance period of the slot status table is
  • the first node selects the largest transmission period as the maintenance period of its own slot state table from the determined transmission period of the other node sending the message.
  • the first node determines the maintenance period of its own slot state table according to its own message sending rate and the message sending rate of other nodes, wherein the first node determines other nodes according to the received messages sent by other nodes. The rate at which messages are sent.
  • the first node determines, according to its current message sending rate, the sending period of the message sent by itself, and the first node determines, according to the received message sent by other nodes (such as a node within a hop range), that the other node sends the message.
  • Transmission period the first node sends a message from the determined self-sending period and other nodes determined During the transmission period of the transmitted message, the largest transmission period is selected as the maintenance period of its own slot status table.
  • the first FI generated by the first node carries the indication information for indicating the period in which the time slot is occupied, and includes the following types:
  • the first node adds indication information indicating a period in which the time slot is occupied in the time slot information corresponding to each time slot in the first FI.
  • the first node may add a “occupation period” sub-domain to the slot information field corresponding to each slot in the first FI to indicate the period occupied by each node.
  • Mode 2 The first node adds, in the first FI, indication information indicating a period in which the time slot in which the first FI is transmitted is occupied.
  • the method further includes the following three preferred implementations:
  • the first node adds a new information field in the first FI, the new information field includes indication information indicating a period in which the time slot in which the first FI is transmitted is occupied, that is, in the first FI, except for each time
  • indication information indicating a period in which the time slot in which the first FI is transmitted is occupied, that is, in the first FI, except for each time
  • an additional information field is added, and the content in the information field is the period in which the time slot in which the first FI is transmitted is occupied.
  • the first node adds indication information indicating a period in which the time slot is occupied in the slot information corresponding to the time slot of the first FI in the first FI, that is, sending the first in the first FI
  • the "occupied period" subfield is added to the slot information field corresponding to the slot of the FI to indicate the period in which the slot is occupied.
  • the first node in the first FI in the slot information corresponding to the time slot corresponding to the time slot of the first FI, the slot occupancy state sub-domain, the STI sub-domain, or the priority sub-domain is carried to indicate that the first
  • the indication information of the period in which the slot of the FI is occupied that is, the information content indicated by the existing sub-field in the slot information field corresponding to the slot in which the first FI is sent in the first FI is replaced with the indication that the current transmission is performed.
  • Mode 3 The first node adds indication information indicating a period in which each time slot is occupied in the first FI.
  • the first node may add a special slot occupation period field in addition to the slot information field corresponding to each slot in the first FI, and focus on the indication information indicating the period in which each slot is occupied.
  • the first node may carry the indication information indicating the period in which the time slot is occupied in the first FI by using any one of the foregoing manners 1 to 3.
  • the number of timeslot information for indicating the slot state status currently maintained by the first node is greater than the first FI that needs to be sent.
  • the first node in step 51, the first node generates the first FI, including:
  • the first node divides its own slot state table into at least two segments, where the number of slot information in each segment is not greater than the maximum number of slot information that the first FI can carry. ;as well as,
  • the first node is on a time slot that it periodically occupies, according to the time included in one of the at least two segments Gap information, generating the first FI.
  • the first FI generated by the first node may be
  • the partial slot information in the slot state table of the first node is sent by the first FI in a round robin manner, that is, the first node divides its own slot state table into at least two segments, each time passing through the An FI transmits only the slot information contained in one sector.
  • the maintenance period of the slot state table of the first node is 300 ms. If the slot length is 1 ms, the slot state table includes slot information of 300 slots, and it is assumed that the slot can be carried in the first FI.
  • the length of the information is 100 time slots, and the time slot status table is divided into three sections (parts), that is, part1 to part3, in units of 100 time slots, as shown in FIG. 6.
  • the first FI sent corresponds to the slot information of part1 in the slot state table currently maintained by the first node
  • the first FI sent on the second periodically occupied slot corresponds to the current node maintained by the first node.
  • the slot information of part 2 in the slot state table, the first FI sent on the third periodically occupied slot corresponds to the slot information of part 3 in the slot state table currently maintained by the first node,
  • the first FI sent on the fourth periodically occupied time slot corresponds to the slot information of part1 in the slot state table currently maintained by the first node, and so on.
  • the slot numbers in the slot status table of the first node in FIG. 6 are numbered from 0 to 99, and may of course be encoded using 0 to 299. Since the number of each time slot is only the identifier of the time slot inside the node and is not sent out, the numbering manner of the time slot number in the time slot status table of the first node is limited.
  • the first node includes, according to one of the at least two segments, on the time slot periodically occupied by the first node.
  • the time slot information, generating the first FI including:
  • the first node carries, in the generated first FI, prompt information indicating a section corresponding to the slot information carried in the first FI that is currently transmitted; or
  • the first node carries, in the generated first FI, first prompt information indicating a section corresponding to slot information in the first FI that is currently transmitted, and a slot state table for indicating the first node.
  • Second prompt information of the number of divided segments, so that the node receiving the first FI can determine the maintenance period of the slot state table of the first node according to the first prompt information and the second prompt information; or
  • the first node carries, in the generated first FI, first prompt information for indicating a section corresponding to slot information in the first FI that is currently transmitted, and a slot state table for indicating the first node.
  • the third prompt information of the maintenance period is such that the node receiving the first FI can learn the maintenance period of the slot state table of the first node according to the third prompt information.
  • the first node may carry the first prompt information, the second prompt information, or the third prompt information in the first FI in the following manner:
  • the first node adds a new information field in the first FI, where the new information field includes at least one of the first prompt information, the second prompt information, and the third prompt information.
  • the first node adds a new sub-domain to the slot information corresponding to the time slot of the first FI in the first FI, to carry at least one of the first prompt information, the second prompt information, and the third prompt information.
  • the first node may also carry at least one of the first prompt information, the second prompt information, and the third prompt information in the first FI.
  • the specific implementation is not limited.
  • the first node divides its own slot state table into at least two segments, including:
  • the first node determines, according to the number of timeslot information in its own slot state table and the number of timeslot information that can be included in a single segment, that the slot state table currently maintained by itself can be divided.
  • the first node starts with the time slot set in its own slot state table, and divides each segment according to the number of slot information that can be included in the set single segment.
  • the first node Based on the segmentation mode, the first node starts with a time slot set in its own slot state table, and divides each segment according to the number of slot information that can be included in the set single segment.
  • the first node includes, in its own slot state table, starting or backward with the set time slot as a starting point, and sequentially dividing according to the number of timeslot information that can be included in the set single segment. Out of each section.
  • the set time slot includes but is not limited to one of the following time slots:
  • the time slot occupied by the first node when transmitting the specified data packet such as the time slot occupied by the first node when transmitting the initial data packet of the specified service
  • the first node sends the time slot occupied by the first FI
  • the first time slot in the slot state table of the first node is the first time slot in the slot state table of the first node.
  • the first node when the first node performs segmentation, which of the above-mentioned time slots is used as a starting point, the first node may be pre-agreed with other nodes, or may be notified by the first node to notify other nodes, and It can be pre-configured to each node by the network side.
  • the method further includes: if the maintenance period of the slot state table of the first node changes, and the slot state table reset trigger condition is met, the first node resets its own slot state. The contents of the slot information in the table, and update the maintenance period of its own slot status table.
  • the first node resets the content of the slot information in its own slot state table, that is, the first node clears the content of each slot information in its current slot state table or only retains the slot occupied by itself. Corresponding time slot information.
  • the slot status table reset trigger condition includes, but is not limited to, one of the following conditions:
  • the first node After the first node completes the sending of the data packet on the time slot occupied by itself, the first node triggers the reset of its own slot state table;
  • the method further includes:
  • Step 53 The first node receives the second FI sent by the other node on the other time slots except the time slot occupied by the first node, where the second FI carries the indication information indicating the period in which the time slot is occupied.
  • Step 54 The first node updates the time slot occupation status currently maintained by the first node according to the received second FI.
  • step 54 is specifically: the first node updates the slot state table for characterizing the slot occupancy status currently maintained by itself according to the received second FI.
  • the first node updates its slot status table according to the received second FI, including:
  • the first node determines, according to the received second FI, that the number of timeslot information carried in the second FI is greater than the number of timeslot information of the slot state table that has been established, or the time slot that needs to be updated.
  • the range of information exceeds the range of time slot information that can be maintained by the established slot state table;
  • the first node is a slot state table that has been established by itself, and at least one extended slot state table is created;
  • the first node updates its established slot state table and/or the extended slot state table corresponding to the established slot state table according to the received slot information carried in the second FI.
  • the number of timeslot information included in the at least one extended slot state table is a positive integer multiple of the number of timeslot information included in the slot state table established by the first node. That is, the number of timeslot information included in the extended slot state table created by the first node may be the same as the number of timeslot information included in the slot state table already established by the first node, or may be greater than The number of timeslot information contained in a slot state table that has been established by a node.
  • each slot information in the at least one extended slot state table includes indication information indicating a period in which the slot corresponding to the slot information is occupied.
  • the format of the slot information in the at least one extended slot state table is the same as the format of the slot information in the slot state table already established by the first node.
  • the first node may determine, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the established time slot state table:
  • the received slot information carried in the second FI for indicating the current FI corresponds to the first hint information of the segment included in the slot state table of the node transmitting the second FI.
  • the first node may determine, according to the indication information carried in the second FI and the location information of the time slot of the second FI, that the range of time slot information that needs to be updated exceeds the established time slot status table.
  • the range of the slot information specifically: the first node first determines the location information of the slot in which the second FI is received (ie, the first node determines that the slot in which the second FI is received is in its own slot state table) Positioning; determining, in the second FI, the slot occupancy status subfield indicating the slot position corresponding to the slot information that the slot has been occupied; and indicating the time slot for the slot occupancy status subfield in the second FI
  • the occupied time slot information the first node determines, according to the indication information of the period indicating that the time slot is occupied in the time slot information, the period occupied by the time slot corresponding to the time slot information, and according to the time slot status of the time slot
  • the time slot information Exceeding the range of time slot information that can be maintained by the slot state table established by the first node.
  • the first node may receive, according to the second prompt information carried in the second FI, the first prompt information, the slot occupation status indication information, the indication information indicating the period in which the time slot is occupied, and the second FI.
  • the time slot is determined, when it is determined that the time point of the most occupied time slot indicated in the second FI and the time point of the next occupied time exceed the maintainable time slot range of the time slot status table of the first node, then determining The time slot information exceeds the range of time slot information that can be maintained by the time slot status table established by the first node.
  • the time point corresponding to each time slot information carried in the received second FI is determined according to the second prompt information and the first prompt information, and then occupied according to the time slot in each time slot information carried in the second FI.
  • the status information determines the time point at which the occupied time slot is last occupied, and determines the time point at which the time slot is occupied next according to the indication information corresponding to the occupied time slot, and finds the time point and the time when any time slot is last occupied.
  • the first node determines the maintenance period of the slot state table of the node transmitting the second FI according to the following manner:
  • the first node determines, according to the first prompt information carried in the received second FI, and the second prompt information indicating the number of segments divided by the slot state table of the node that sends the second FI, The maintenance period of the slot state table of the node of the second FI.
  • the first node determines, according to the received first prompt information and the second prompt information carried in the second FI, that the maintenance period of the slot state table of the node that sends the second FI is specifically:
  • the number of timeslot information that is maintained is multiplied by the length of the time slot, and multiplied by the number of divided sectors, the maintenance period of the slot state table of the node transmitting the second FI is obtained.
  • the first node updates the established slot state table and/or the established slot state table according to the received slot information carried in the second FI.
  • Extended slot status table including:
  • the first node updates its own established slot state table according to the content of the slot information included in the received second FI information that does not exceed the range of slot information that can be maintained by the slot state table that has been established by itself;
  • the first node updates the corresponding slot state table corresponding to the content of the slot information included in the second FI that is beyond the range of the slot information maintainable by the slot state table that has been established.
  • Extended slot status table
  • the first node updates the established slot state table and/or the extended slot corresponding to the established slot state table according to the received slot information carried in the second FI.
  • Status table :
  • Manner 1 The first node receives the time slot status table of the second FI according to the content of each time slot information carried in the second FI, and/or the established time
  • the corresponding position in the extended slot state table corresponding to the slot state table is the starting point forward or backward, and sequentially updates its established slot state table and/or the extended slot state corresponding to the established slot state table. table.
  • the first node updates its established slot state table and/or the extended slot corresponding to the established slot state table according to the content of each slot information carried in the received second FI.
  • the state table that is, the first node needs to traverse each time slot information carried in the second FI when updating the slot state table that has been established by itself and/or the extended slot state table corresponding to the established slot state table. .
  • the first node determines, according to the content of each time slot information carried in the second FI, that the included time slot occupation status sub-field indicates that the time slot has been occupied, and according to the determined time
  • the content of the slot information is that the slot of the second FI is received in the slot state table that has been established by itself and/or the corresponding position in the extended slot state table corresponding to the established slot state table is used as a starting point. Pre- or backward, the self-established slot state table and/or the extended slot state table corresponding to the established slot state table are updated.
  • the first node first determines the time slot information indicating that the time slot of the time slot of the second FI in the second FI indicates that the time slot has been occupied, and then updates the established time slot according to the determined time slot information.
  • a state table and/or an extended slot state table corresponding to the established slot state table that is, when the first node updates its own established slot state table and/or the extension corresponding to the established slot state table
  • the state table is gapped, it is only necessary to traverse the determined time slot information.
  • the method further includes: when the slot state table that the first node has established satisfies the slot state table reset trigger condition, the first node resets the established slot state table, and And updating the content of the slot information included in the extended slot state table corresponding to the established slot state table to the slot information included in the reset established slot state table.
  • the first node if the first node only creates an extended slot state table, after the first node resets the established slot state table, the content of the slot information included in the extended slot state table is updated. Up to the time slot information included in the reset established time slot status table; if the first node creates at least two extended time slot status tables, the first node resets the established time slot status table After that, the slot position is adjacent to the extended slot state of the established slot state table. The contents of the slot information contained in the table (ie, the created first extended slot state table) are updated to the slot information contained in the reset established slot state table.
  • Embodiment 1 This embodiment mainly describes a process in which node A sends an FI. details as follows:
  • the node A determines, according to the rate control mechanism, that the transmission period of the road safety message sent by itself is 200 ms, and further determines the variable length slot state table maintained by itself (that is, the slot state table maintained by itself), in order to distinguish it from the existing mode.
  • the maintenance period of the determined slot status table of the maintenance period is also 200 ms.
  • variable length time slot status table maintained by node A needs to record information of 200 time slots.
  • the format of the variable-length slot state table maintained by the node A is as shown in FIG. 7.
  • the slot information unit record information corresponding to each slot in the variable-length slot state table includes: slot number, slot occupancy status, and occupation time.
  • variable slot status table needs to be divided into two sections (part), node A. Each time the FI is sent, only the slot information corresponding to a certain section in the variable length slot status table currently maintained can be sent. It is assumed that node A occupies slot 6 in a period of 200 ms. The section division mode is divided into section 1 (part1) from the slot 6 of node A, and the remaining 100 slots are divided into sections. 2 (part2), as shown in Figure 7.
  • the node A determines the segment corresponding to the FI to be sent according to the preset policy, and assumes that the sector corresponding to the FI sent this time is the segment 1. Then, the node A maps the slot information in the segment 1 of its variable-length slot state table to the slot information carried by the FI.
  • the content of the slot information included in the segment 1 in the variable-length slot state table is as shown in FIG. 8.
  • the mapping manner of the slot information recorded in the variable-length slot state table to the slot information carried in the FI does not belong to the present invention. The content is not described in detail here.
  • a simple mapping method is that the slot information carried by the FI is the same as the slot information recorded in the slot state table.
  • Embodiment 2 This embodiment mainly describes a process in which the node D maintains its own variable length slot state table after receiving the FI sent by the node A.
  • the variable-length slot state table of the node D that is, the slot state table maintained by the node D is defined as a variable-length slot state table
  • the maintenance period is 100ms (assuming that the slot length is 1ms, the maintenance period corresponds to 100 slots).
  • the process of maintaining the variable length slot status table of the node D after receiving the FI sent by the node A is as follows:
  • variable-length slot state table maintained by the node D is the same as that of the node A. Since the maintenance period of the variable-length slot state table of the node D is 100 ms, the variable-length slot state table includes 100 slots ( As shown in Figure 9). It is assumed that node D occupies slot 99 in a period of 100 ms. After slot 99 has sent its own FI reset variable slot status table, it does not receive FI information sent by other nodes before slot 6 arrives, that is, at the time. In the variable-length slot state table of the front node D of the slot 6, except for its own slot information, all other slots are idle (as shown in FIG. 10).
  • the node D receives the FI sent by the node A in the time slot 6, wherein the FI sent by the node A is generated according to the content of the time slot information included in the segment shown in FIG.
  • the node D determines, according to the detection domain information in the FI (that is, the indication information indicating the period in which the time slot is occupied in the time slot information corresponding to the time slot 6), the period of the variable length time slot state table maintained by the node A is 200 ms. And determining, according to the first prompt information of the FI corresponding section carried in the FI sent by the node A, the slot information carried in the FI corresponding to the slot information included in the part 1 of the variable length slot state table maintained by the node A. content.
  • the node D determines the period occupied by each time slot in the FI according to the obtained segment information corresponding to the FI and the slot position of the receiving FI (ie, slot 6), thereby determining the exact time when each time slot is occupied, and Update the time slot information in the variable length slot state table maintained by itself and the created slot time status table:
  • the node D Since the node D receives the slot information carried in the FI sent by the node A in the slot 6 corresponding to the part 1 of the variable-length slot state table maintained by the node A, according to the agreed segmentation rule (ie, from the node A in 200 ms)
  • the time slot 6 occupied by the cycle starts to be divided into one segment every 100 time slots, and it is determined that the time slot information corresponding to the time slot 6 in the received FI indicates the state of the current receiving time slot 6.
  • the node D according to the received slot information sub-field corresponding to the slot 6 in the FI (that is, the indication information indicating the period in which the slot is occupied), it can be known that the node A occupies the slot 6 in a period of 200 ms; the node D is based on The priority sub-domain corresponding to the time slot 6 indicates that the priority of the service sent by the node A on the time slot 6 is 2 (or the priority of the node A is 2).
  • the node D updates the slot information of the slot 6 in the variable length slot state table maintained by the node D according to the determined slot information of the slot 6 in the FI. Specifically, the slot information corresponding to the slot 6 in the FI is detected.
  • node D sets the occupancy state sub-unit of slot 6 in the variable-length slot state table maintained by itself to be occupied by one-hop node (10), and the priority sub-unit is set to 1 (00), STI sub-unit The STI (00000001) corresponding to node A is filled, and the occupation period subunit is set to 200 (10).
  • the FI that is sent by the node A indicates that the second occupied slot is slot 1.
  • the node D determines the position of the slot 1 in the variable length slot state table maintained by itself (as shown in FIG. 11), and updates the self-maintained variable-length slot state table according to the slot information indicated by the slot 1 in the FI.
  • the slot information corresponding to the slot Since slot 1 is a non-detection domain slot, node D indicates that the occupancy status sub-unit of slot 1 in its variable-length slot state table is occupied by two-hop nodes (11), and the priority sub-unit is set to 2 ( 10), the STI subunit is set to the STI (00000010) corresponding to the node B, and the occupation period subunit is set to 100 (00).
  • the FI that is sent by the node A indicates that the third occupied slot is slot 8.
  • the node D determines the position of the time slot 8 in the variable length time slot state table indicating the maintenance. It can be seen from FIG. 11 that the actual occupied time point corresponding to the time slot 8 has exceeded the time range corresponding to the variable length time slot state table maintained by the node D.
  • the node D is required to create an extended time slot status table, and the created extended time slot status table adopts the same format as the variable length time slot status table, and each time slot The occupied state is all idle (as shown in Figure 12).
  • the node D updates the corresponding slot information in the extended slot state table according to the period information occupied by the slot 8 carried in the FI (ie, the indication information indicating the period in which the slot 8 is occupied).
  • the position occupied by the time slot 8 determined in the extended slot state table of the node D is as shown in the figure As shown in FIG. 11, the corresponding slot state information is updated. Since the time slot 8 is a non-detection domain time slot, the node D sets the occupation state sub-unit of the time slot 8 in the extended time slot status table to be occupied by the two-hop node (11), and the priority sub-unit is set to 2 (10).
  • the STI subunit is set to the STI (00000011) corresponding to the node B, and the occupied period subunit is set to 200 (01).
  • the updated extended slot status table is as shown in FIG.
  • Embodiment 3 This embodiment mainly describes a process of assigning information recorded in an extended slot state table to a variable length slot state table.
  • Node D occupies the slot 99 to transmit data in a period of 100 ms. It is assumed that before the arrival of the slot 99, the node D judges that the slot 99 occupied by itself does not collide according to the FI received from the surrounding one hop node, and the node D is After the time slot 99 arrives and after the corresponding FI is sent in the time slot 99, reset its own variable length time slot state table (the reset variable time slot state table is as shown in FIG. 14);
  • Node D checks to see if there is an extended slot state table in which slot information is recorded with the next 100 ms period. Taking the scenario in the second embodiment as an example, the node D determines that there is currently an extended slot state table in which the slot information of the next 100 ms period is recorded.
  • the node D updates the time slot information recorded in the extended time slot status table to the reset variable length time slot status table according to the time series correspondence relationship, and the updated variable length time slot status table is as shown in FIG. 15 .
  • Node D clears the invalid extended slot status table.
  • the content recorded in the extended slot state table may be completely updated into the reset variable slot state table, so the extended slot state table may be cleared after the update is completed.
  • Embodiment 4 This embodiment mainly describes the process of length change of the variable length slot state table.
  • node D occupies time slot 99 to transmit data in a period of 100 ms. If at time slot 80, the higher layer of node D determines that the message transmission period needs to be changed from the current 100 ms to 200 ms according to the detected time slot resource occupancy. In order to allow more nodes to access.
  • Node D determines that the period of the variable length slot state table currently maintained by itself needs to be changed from 100 ms to 200 ms.
  • the above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
  • any node in the car network system may perform only the processing described in steps 51 to 52, and may also perform the processing described in steps 51 to 54.
  • the first node may also perform only the processing described in steps 53 to 54.
  • an embodiment of the present invention provides another method for maintaining a slot state.
  • the method includes:
  • Step 161 The first node receives the second FI sent by the other node in a time slot other than the time slot occupied by the first node, where the second FI carries the indication information indicating the period in which the time slot is occupied.
  • Step 162 The first node updates the time slot occupation status currently maintained by the first node according to the second FI.
  • step 161 Since the processing of the step 161 is the same as the processing described in the above step 53, and the processing of the step 162 is the same as the processing described in the above step 54, for details, refer to the description of the above steps 53 and 54.
  • step 162 is specifically:
  • the first node determines, according to the received second FI, that the number of timeslot information carried in the second FI is greater than the time slot state table that is established by itself to represent the slot occupancy state currently maintained by itself.
  • the first node is a slot state table that has been established by itself, and at least one extended slot state table is created;
  • the first node updates its established slot state table and/or the extended slot state table corresponding to the established slot state table according to the received slot information carried in the second FI.
  • the number of timeslot information included in the at least one extended slot state table is a positive integer multiple of the number of timeslot information included in the slot state table established by the first node. That is, the number of timeslot information included in the extended slot state table created by the first node may be the same as the number of timeslot information included in the slot state table already established by the first node, or may be greater than The number of timeslot information contained in a slot state table that has been established by a node.
  • each slot information in the at least one extended slot state table includes indication information indicating a period in which the slot corresponding to the slot information is occupied.
  • the format of the slot information in the at least one extended slot state table is the same as the format of the slot information in the slot state table already established by the first node.
  • the first node determines, according to at least one of the following information, that the range of time slot information that needs to be updated exceeds a range of time slot information that can be maintained by the established time slot state table:
  • the received slot information carried in the second FI for indicating the current FI corresponds to the first hint information of the segment included in the slot state table of the node transmitting the second FI.
  • the first node determines the maintenance period of the slot state table of the node transmitting the second FI according to the following manner:
  • the first node is configured according to the slot state table carried in the second FI that is used to indicate the node that sends the second FI.
  • the third prompt information of the maintenance period determines the maintenance period of the slot state table of the node that sends the second FI; or
  • the first node determines, according to the first prompt information carried in the received second FI, and the second prompt information indicating the number of segments divided by the slot state table of the node that sends the second FI, The maintenance period of the slot state table of the node of the second FI.
  • the first node updates the established slot state table and/or the established slot state table according to the received slot information carried in the second FI.
  • Extended slot status table including:
  • the first node updates the established slot state table according to the content of the slot information included in the second FI that is not beyond the range of the slot information maintainable by the slot state table that has been established;
  • the first node updates the corresponding slot state table corresponding to the content of the slot information that is included in the second FI that is beyond the range of the slot information that can be maintained by the slot state table that has been established. Extended slot status table.
  • the first node updates the established slot state table and/or the extended slot corresponding to the established slot state table according to the received slot information carried in the second FI.
  • Status table :
  • Manner 1 The first node receives the time slot status table of the second FI according to the content of each time slot information carried in the second FI, and/or the established time
  • the corresponding position in the extended slot state table corresponding to the slot state table is the starting point forward or backward, and sequentially updates its established slot state table and/or the extended slot state corresponding to the established slot state table. table.
  • the first node determines, according to the content of each time slot information carried in the second FI, that the included time slot occupation status sub-field indicates that the time slot has been occupied, and according to the determined time
  • the content of the slot information is that the slot of the second FI is received in the slot state table that has been established by itself and/or the corresponding position in the extended slot state table corresponding to the established slot state table is used as a starting point. Pre- or backward, the self-established slot state table and/or the extended slot state table corresponding to the established slot state table are updated.
  • the method further includes: when the slot state table that the first node has established satisfies the slot state table reset trigger condition, the first node resets the established slot state table, and And updating the content of the slot information included in the extended slot state table corresponding to the established slot state table to the slot information included in the reset established slot state table.
  • the embodiment of the present invention further provides a maintenance device for a slot state table, which is applied to any node device (referred to as a first node) of the in-vehicle communication system.
  • the device includes:
  • the first processing module 171 is configured to generate a first FI, where the first FI carries indication information indicating a period in which the time slot is occupied;
  • the sending module 172 is configured to send the first FI generated by the first processing module to other nodes on a time slot occupied by the first node to which the first node belongs.
  • the apparatus provided by the embodiment of the present invention generates a first FI that carries indication information indicating a period in which a time slot is occupied, and generates a first FI generated by the first processing module on a time slot occupied by the first node. Send to other nodes.
  • the time slot information of one-hop node and two-hop node that they perceive can be accurately transmitted to surrounding nodes to support the transmission of road safety messages in different vehicle density scenarios.
  • the first FI carries the indication information indicating the period in which the time slot is occupied, and/or the content in the second FI that carries the indication information indicating the period in which the time slot is occupied may be a time slot.
  • the occupied period information may also be the rate at which the node occupying the time slot transmits traffic on the time slot.
  • the first processing module 171 is specifically configured to: generate a first FI according to a slot state table for characterizing a slot occupancy status currently maintained by the first node to which the first node belongs.
  • the first processing module 171 is further configured to: determine, according to the message sending rate, a maintenance period of the slot state table of the first node to which the UE belongs, where the message sending rate includes a message sending rate of the first node to which the node belongs.
  • the message sending rate includes a message sending rate of the first node to which the node belongs.
  • each slot information in the slot state table maintained by the first node includes an indication indicating a period in which the slot corresponding to the slot information is occupied.
  • Information such as adding a "occupancy cycle" sub-unit, is used to indicate the period in which each time slot is occupied.
  • the content of the indication information included in each time slot information in the time slot status table may be the period information in which the time slot is occupied, or the rate at which the node occupying the time slot transmits the service on the time slot.
  • the first processing module 171 is specifically configured to: add, in the slot information corresponding to each time slot in the first FI, indication information indicating a period in which the time slot is occupied, as described in the foregoing manner 1, The description of the period in which the time slot in which the first FI is sent is added is added to the first FI. For details, refer to the foregoing mode 2, and details are not described herein; or, in the first The indication information indicating the period in which each time slot is occupied is added to the FI. For details, refer to the foregoing mode 3, and details are not described herein again.
  • the first processing module 171 is specifically configured to: add a new information field in the first FI, where the new information field includes indication information indicating a period in which the time slot in which the first FI is sent is occupied; or The indication information indicating the period in which the time slot is occupied is added to the time slot information corresponding to the time slot of the first FI in the first FI; or the time slot in the first FI for transmitting the first FI
  • the slot occupancy status sub-domain, the STI sub-domain, or the priority sub-domain in the corresponding slot information carries indication information indicating a period in which the slot in which the first FI is transmitted is occupied.
  • the first processing module 171 is specifically configured to:
  • the number of timeslot information of the slot state table for characterizing the slot occupancy state currently maintained by the first node to which the first node belongs is greater than the maximum number of timeslot information that the first FI can carry;
  • the slot state table of the first node is divided into at least two segments, and the number of slot information in each segment is not greater than a maximum value of the number of slot information that the first FI can carry; a time slot periodically occupied by the first node, according to one of the at least two segments
  • the slot information included in the segment generates the first FI and sends it to other nodes.
  • the first processing module 171 is specifically configured to:
  • first prompt information indicating a section corresponding to the slot information in the first FI that is sent this time; or carrying the first FI in the first FI for indicating the current transmission First prompt information of the section corresponding to the slot information, and second hint information indicating the number of sections divided by the slot state table of the first node to which the UE belongs, or carried in the first FI
  • the first processing module 171 may carry the first prompt information, the second prompt information, or the third prompt information in the first FI in the following manner:
  • the first processing module 171 may also carry at least one of the first prompt information, the second prompt information, and the third prompt information in the first FI.
  • the specific embodiments of the invention are not limited.
  • the first processing module 171 divides the slot state table of the first node to which it belongs into at least two segments according to the following manner:
  • Determining the currently maintained slot state of the first node according to the number of slot information in the slot state table of the first node to which it belongs and the number of slot information that can be included in the set single segment.
  • the number of segments that can be divided by the table; and, in the slot state table of the first node, starting from a set time slot, according to the slot information that can be included in the set single segment The number divides each of the segments.
  • the first processing module 171 is specifically configured to: in the slot state table of the first node to which it belongs, start or backward with the set time slot as a starting point, and can be included in the set single segment.
  • the number of time slot information is divided into segments in turn.
  • the set time slot includes but is not limited to one of the following time slots:
  • the time slot occupied by the first node when transmitting the specified data packet such as the time slot occupied by the first node when transmitting the initial data packet of the designated service
  • the first node sends the time slot occupied by the first FI
  • the first time slot in the slot state table of the first node is the first time slot in the slot state table of the first node.
  • the specific time slot is used as the starting point, and the first node may be pre-agreed with other nodes, or may be notified by the first processing module 171.
  • Other nodes can also be pre-configured to each node by the network side.
  • the first processing module 171 is further configured to: when the maintenance period of the slot state table of the first node to which it belongs belongs changes, and the slot state table reset trigger condition is met, when the first node is reset The content of the slot information in the slot status table is updated, and the maintenance period of the slot status table of the first node is updated.
  • the apparatus provided by the embodiment of the present invention further includes:
  • the receiving module 173 is configured to receive, by using a time slot other than the time slot occupied by the first node to which the first node belongs, to receive the second FI sent by the other node, where the second FI is carried to indicate that the time slot is Indication information of the occupied period;
  • the second processing module 174 is configured to update, according to the second FI received by the receiving module 173, the slot occupancy status currently maintained by the first node to which the first node belongs, where the second FI carries a slot indicating that the time slot is occupied. The indication of the cycle.
  • the second processing module 174 is specifically configured to: according to the second FI received by the receiving module 173, update a slot state table for characterizing the slot occupancy status currently maintained by the first node to which the UE belongs.
  • the second processing module 174 is specifically configured to: if the number of timeslot information carried in the second FI received by the receiving module 173 is greater than the time slot information of the slot state table established by the first node to which the first node belongs Or, according to the second FI received by the receiving module 173, determining that the range of the slot information to be updated exceeds the range of the slot information that can be maintained by the slot state table established by the first node to which the first node belongs, The time slot status table of the first node to which the first node belongs is created, and at least one extended time slot status table is created; and according to the time slot information carried in the second FI received by the receiving module 173, the first node to which the update belongs is established. The slot status table and/or the extended slot status table corresponding to the established slot status table.
  • the number of timeslot information included in the at least one extended slot state table is positive of the number of timeslot information included in the slot state table that has been established by the first node to which the second processing module 174 belongs. Integer multiple. That is, the number of timeslot information included in the extended slot state table created by the second processing module 174 may be the same as the number of timeslot information included in the slot state table already established by the first node to which it belongs. The number of time slot information included in the slot state table that has been established by the first node may be greater.
  • each slot information in the at least one extended slot state table includes indication information indicating a period in which the slot corresponding to the slot information is occupied.
  • the format of the slot information in the at least one extended slot state table is the same as the format of the slot information in the slot state table already established by the first node to which the second processing module 174 belongs.
  • the second processing module 174 determines, according to at least one of the following information, that the range of the slot information that needs to be updated exceeds the range of the slot information that can be maintained by the slot state table that the first node that the UE belongs to:
  • the first node to which the first node belongs receives the location information of the time slot of the second FI;
  • the slot information carried in the second FI carried in the second FI for indicating the current FI corresponds to the first hint information of the section included in the slot state table of the node transmitting the second FI.
  • the second processing module 174 can determine, according to the indication information carried in the second FI, and the location information of the time slot of the second FI received by the receiving module 173, that the range of the slot information that needs to be updated exceeds the first The range of time slot information that can be maintained by the slot state table of the node is established. Specifically, the second processing module 174 first determines that the receiving module 173 receives the location information of the time slot of the second FI (ie, determines that the second FI is received.
  • the period in which the time slot is occupied, and determining whether the time slot information is super or not according to the maintenance period of the slot state table of the first node to which the first node belongs and the determined period in which the time slot corresponding to the time slot information is occupied Range of slot information of the first node itself belongs established slot state table may be maintained.
  • the determined time slot corresponding to the time slot information corresponding to the time slot and the next occupied time point exceed the maintainable time slot range of the time slot state table of the first node to which the first time slot belongs, then the The slot information exceeds the range of slot information that can be maintained by the slot state table established by the first node.
  • the second processing module 174 can receive, according to the second prompt information, the first prompt information, the slot occupancy status indication information, the indication information indicating the period in which the time slot is occupied, and the received information.
  • the time slot of the second FI determining that the time slot of the most occupied time slot indicated in the second FI and the time point of the next occupied time exceed the maintainable time slot of the slot state table of the first node to which the first node belongs In the range, it is determined that the time slot information exceeds a range of time slot information that can be maintained by the time slot state table established by the first node.
  • the time point corresponding to each time slot information carried in the received second FI is determined according to the second prompt information and the first prompt information, and then occupied according to the time slot in each time slot information carried in the second FI.
  • the status information determines the time point at which the occupied time slot is last occupied, and determines the time point at which the time slot is occupied next according to the indication information corresponding to the occupied time slot, and finds the time point and the time when any time slot is last occupied.
  • the occupied time point exceeds the time slot range that can be maintained by the slot state table of the first node to which it belongs, it is determined that the time slot information corresponding to the time slot exceeds the established time slot state table of the first node. The range of time slot information maintained.
  • the second processing module 174 determines a maintenance period of the slot state table of the node that sends the second FI, including: a node that is carried in the second FI that is received by the receiving module 173 and that is used to send the second FI.
  • the third prompt information of the maintenance period of the slot state table determines the maintenance period of the slot state table of the node that sends the second FI; or the first prompt carried in the second FI received by the receiving module 173 Information, and for indicating that the second FI is sent
  • the second prompt information of the number of segments divided by the slot state table of the node determines the maintenance period of the slot state table of the node transmitting the second FI.
  • the second processing module 174 is specifically configured to: according to the content of the time slot information in the second FI that does not exceed the range of time slot information that can be maintained by the slot state table established by the first node to which the first node belongs. Updating the established slot state table; and updating the content of the slot information according to the range of the slot information that can be maintained beyond the slot state table established by the first node included in the second FI An extended slot state table corresponding to the established slot state table.
  • the second processing module 174 is specifically configured to:
  • the time slot of the second FI slot in the slot state table that the first node belongs to and/or the corresponding position in the extended slot state table corresponding to the established slot state table is the starting point forward or backward. And updating the slot state table that has been established by the first node and/or the extended slot state table corresponding to the established slot state table.
  • the second processing module 174 is further configured to: when the established slot state table satisfies the slot state table reset trigger condition, reset the established slot state table, and the The content of the slot information included in the extended slot state table corresponding to the established slot state table is updated to the slot information included in the reset slot state table after the reset.
  • the slot state table reset trigger condition includes, but is not limited to, one of the following conditions:
  • the embodiment of the present invention further provides a time slot state maintenance device, which is applied to any node device (referred to as a first node) of the in-vehicle communication system, as shown in FIG. 19, and includes:
  • the receiving module 191 on the other time slots except the time slot occupied by the first node to which the first node belongs, receives the second FI sent by the other node, where the second FI carries the second FI to indicate that the time slot is occupied.
  • Periodic indication information
  • the second processing module 192 is configured to update a slot occupation status currently maintained by the first node according to the second FI received by the receiving module.
  • the processing procedure of the receiving module 191 is the same as the receiving module 173 shown in FIG. 18, and the processing procedure of the second processing module 192 is the same as the second processing module 174 shown in FIG. 18.
  • the processing procedure of the receiving module 191 is the same as the receiving module 173 shown in FIG. 18, and the processing procedure of the second processing module 192 is the same as the second processing module 174 shown in FIG. 18.
  • the related descriptions of the receiving module 173 and the second processing module 174 and details are not described herein again.
  • the slot state maintenance apparatus may include only the first processing module 171 and the sending module 172; or may only include the receiving module 173 (or the receiving module 191) and the second processing module 174 (or the second The processing module 192) may also include both the first processing module 171 and the sending module 172, and the receiving module 173 (or the receiving module 191) and the second processing module 174 (or the second processing module 192).
  • the node device is any node device (such as an in-vehicle device) in an in-vehicle communication system, and the node device includes at least one processor 201, and a transmitter 202 connected to the at least one processor 201, wherein :
  • the processor 201 is configured to generate a first FI, where the first FI carries indication information indicating a period in which the time slot is occupied;
  • the transmitter 202 is configured to transmit the first FI generated by the processor 201 to other nodes on a time slot occupied by the first node to which it belongs.
  • the node device provided by the embodiment of the present invention is any node device (such as an in-vehicle device) in the in-vehicle communication system, and can detect one-hop node and two of the same when the time slots occupied by different nodes are different.
  • the slot occupancy information of the hop node is accurately transmitted to the surrounding nodes, and supports the transmission of road safety messages in different vehicle density scenarios.
  • the first FI carries the indication information indicating the period in which the time slot is occupied, and/or the content in the second FI that carries the indication information indicating the period in which the time slot is occupied may be a time slot.
  • the occupied period information may also be the rate at which the node occupying the time slot transmits traffic on the time slot.
  • the processor 201 is configured to: generate a first FI according to a slot state table for characterizing a slot occupancy status currently maintained by the first node to which the first node belongs.
  • the processor 201 is further configured to: determine, according to the message sending rate, a maintenance period of the slot state table of the first node to which the user belongs, where the message sending rate includes a message sending rate of the first node to which the node belongs, For details about the message sending rate of the node and/or other nodes, refer to the description in the method section, and details are not described here.
  • each slot information in the slot state table maintained by the first node includes an indication indicating a period in which the slot corresponding to the slot information is occupied.
  • Information such as adding a "occupancy cycle" sub-unit, is used to indicate the period in which each time slot is occupied.
  • the content of the indication information included in each time slot information in the time slot status table may be the period information in which the time slot is occupied, or the rate at which the node occupying the time slot transmits the service on the time slot.
  • the processor 201 is configured to: add, in the slot information corresponding to each time slot in the first FI, indication information indicating a period in which the time slot is occupied, as described in the foregoing manner 1, The description of the period in which the time slot in which the first FI is sent is added is added to the first FI. For details, refer to the foregoing mode 2, and details are not described herein; or, in the first The indication information indicating the period in which each time slot is occupied is added to the FI. For details, refer to the foregoing mode 3, and details are not described herein again.
  • the processor 201 is configured to: add a new information field in the first FI, where the new information field includes indication information indicating a period in which the time slot in which the first FI is sent is occupied; or The indication information indicating the period in which the time slot is occupied is added to the time slot information corresponding to the time slot of the first FI in the first FI; or the time slot in the first FI for transmitting the first FI
  • the slot occupancy status sub-domain, the STI sub-domain, or the priority sub-domain in the corresponding slot information carries indication information indicating a period in which the slot in which the first FI is transmitted is occupied.
  • the processor 201 is configured to: determine a slot state for characterizing the slot occupancy status currently maintained by the first node to which the node belongs.
  • the number of timeslot information of the table is greater than the maximum number of timeslot information that the first FI can carry; dividing the slot state table of the first node into at least two segments, within each segment The number of timeslot information is not greater than a maximum value of the number of timeslot information that the first FI can carry; and on a time slot periodically occupied by the first node, according to one of the at least two segments The slot information included in the segment generates a first FI.
  • the processor 201 is configured to: carry the first FI in the first FI for indicating the current FI.
  • the first prompt information of the segment and the third prompt information for indicating the maintenance period of the slot state table of the first node to which the user belongs.
  • the processor 201 is configured to carry the first prompt information, the second prompt information, or the third prompt information in the first FI in the following manner:
  • the processor 201 may also carry at least one of the first prompt information, the second prompt information, and the third prompt information in the first FI. No The specific implementation is limited.
  • the processor 201 is configured to divide the slot state table of the first node to which it belongs into at least two segments according to the following manner:
  • Determining the currently maintained slot state of the first node according to the number of slot information in the slot state table of the first node to which it belongs and the number of slot information that can be included in the set single segment.
  • the processor 201 is configured to: use, in a slot state table of the first node to which it belongs, start or backward with the set time slot as a starting point, and can be included in the set single segment.
  • the number of time slot information is divided into segments in turn.
  • the set time slot includes but is not limited to one of the following time slots:
  • the time slot occupied by the first node when transmitting the specified data packet such as the time slot occupied by the first node when transmitting the initial data packet of the designated service
  • the first node sends the time slot occupied by the first FI
  • the first time slot in the slot state table of the first node is the first time slot in the slot state table of the first node.
  • the first node may be pre-agreed with other nodes, or may be determined by the processor 201 and then notified to other nodes. It can also be pre-configured to each node by the network side.
  • the node device provided by the embodiment of the present invention further includes:
  • the receiver 203 which is connected to the processor 201, is configured to receive a second FI sent by another node on a time slot other than the time slot occupied by the first node to which the user belongs, wherein the second FI
  • the FI carries indication information indicating a period in which the time slot is occupied;
  • the processor 201 is further configured to: according to the second FI received by the receiver 203, update a slot state table for characterizing the slot occupancy status currently maintained by the first node to which the UE belongs.
  • the processor 201 is configured to: reset the slot state table of the first node if the maintenance period of the slot state table of the first node to which it belongs belongs changes and the slot state table reset trigger condition is met The content of the slot information in the medium, and updates the maintenance period of the slot state table of the first node.
  • the processor 201 is configured to: if the number of timeslot information carried in the second FI received by the receiver 203 is greater than the time slot information of the slot state table established by the first node to which the UE belongs. Or the number of time slot information that needs to be updated according to the second FI received by the receiver 203 exceeds the range of time slot information that can be maintained by the time slot state table established by the first node to which the first node belongs. Creating at least one extended slot state table for the slot state table established by the first node to which it belongs; and receiving the slot letter carried in the second FI received by the receiver 203 And updating the slot state table established by the first node to which it belongs and/or the extended slot state table corresponding to the established slot state table.
  • the number of timeslot information included in the at least one extended slot state table is a positive integer multiple of the number of timeslot information included in the slot state table established by the first node. That is, the number of timeslot information included in the extended slot state table created by the processor 201 may be the same as the number of timeslot information included in the slot state table already established by the first node to which the processor belongs. The number of time slot information included in the slot state table that has been established by the first node may be greater.
  • each slot information in the at least one extended slot state table includes indication information indicating a period in which the slot corresponding to the slot information is occupied.
  • the format of the slot information in the at least one extended slot state table is the same as the format of the slot information in the slot state table already established by the first node.
  • the processor 201 is configured to determine, according to at least one of the following information, that the range of the slot information that needs to be updated exceeds a range of time slot information that can be maintained by the slot state table that the first node that the UE belongs to:
  • the first node to which the first node belongs receives the location information of the time slot of the second FI;
  • the slot information carried in the second FI carried in the second FI for indicating the current FI corresponds to the first hint information of the section included in the slot state table of the node transmitting the second FI.
  • the processor 201 may determine, according to the indication information carried in the second FI and the location information of the time slot of the second FI received by the receiver 203, that the range of the slot information that needs to be updated is beyond the first node to which the UE belongs.
  • the range of time slot information that can be maintained by the established time slot state table.
  • the processor 201 first determines the location information of the time slot in which the receiver 203 receives the second FI (ie, determines that the time slot in which the second FI is received is a location in the slot state table of the first node to which the user belongs; and then determining a slot location corresponding to the slot information in which the slot occupancy status subfield in the second FI indicates that the slot has been occupied;
  • the slot occupancy status subfield in the second FI indicates the slot information that the slot has been occupied, and according to the indication information indicating the period in which the slot is occupied in the slot information, it is determined that the slot corresponding to the slot information is occupied.
  • the slot information point range established slot state table may be maintained. For example, if the determined time slot corresponding to the time slot information corresponding to the time slot and the next occupied time point exceed the maintainable time slot range of the time slot state table of the first node to which the first time slot belongs, then the The slot information exceeds the range of slot information that can be maintained by the slot state table established by the first node.
  • the processor 201 may be configured to: according to the second prompt information carried in the second FI, the first prompt information, the slot occupation status indication information, the indication information used to indicate the period in which the time slot is occupied, and the second FI is received.
  • Time slot determined When the time point of the most occupied time slot indicated in the second FI and the time point of the next occupied time exceed the maintainable time slot range of the time slot state table of the first node to which the first FI belongs, the time is determined.
  • the slot information exceeds the range of slot information that can be maintained by the slot state table established by the first node.
  • the time point corresponding to each time slot information carried in the received second FI is determined according to the second prompt information and the first prompt information, and then occupied according to the time slot in each time slot information carried in the second FI.
  • the status information determines the time point at which the occupied time slot is last occupied, and determines the time point at which the time slot is occupied next according to the indication information corresponding to the occupied time slot, and finds the time point and the time when any time slot is last occupied.
  • the occupied time point exceeds the time slot range that can be maintained by the slot state table of the first node to which it belongs, it is determined that the time slot information corresponding to the time slot exceeds the established time slot state table of the first node. The range of time slot information maintained.
  • the processor 201 determines a maintenance period of the slot state table of the node that sends the second FI, including: according to the second FI carried in the receiver 203, indicating that the node sending the second FI is sent.
  • the third prompt information of the maintenance period of the slot state table determines a maintenance period of the slot state table of the node that sends the second FI; or, according to the first prompt information carried in the second FI received by the receiver 203, And a second prompt information indicating the number of extents divided by the slot state table of the node transmitting the second FI, and determining a maintenance period of the slot state table of the node transmitting the second FI.
  • the processor 201 is configured to: specifically, according to the content of the time slot information in the second FI that does not exceed the range of time slot information that can be maintained by the slot state table established by the first node to which the first node belongs. Updating the established slot state table; and updating the content of the slot information according to the range of the slot information that can be maintained beyond the slot state table established by the first node included in the second FI An extended slot state table corresponding to the established slot state table.
  • processor 201 is configured to be specifically used to:
  • the receiver 203 receives the time slot status table of the second node to which the second FI belongs and/or the established time slot.
  • the corresponding position in the extended slot state table corresponding to the state table is the starting point forward or backward, and the slot state table established by the first node and/or the extension corresponding to the established slot state table are sequentially updated.
  • the gap state table refer to the above method one, which will not be described here; or
  • the processor 201 is further configured to: when the established slot state table satisfies the slot state table reset trigger condition, reset the established slot state table, and The content of the slot information included in the extended slot state table corresponding to the established slot state table is updated to the slot information included in the reset slot state table after the reset.
  • the slot state table reset trigger condition includes, but is not limited to, one of the following conditions:
  • the embodiment of the present invention further provides another node device (ie, a first node).
  • the node device is any node device (such as an in-vehicle device) in the in-vehicle communication system.
  • the node device includes a receiver 221 and at least one processor 222 coupled to the receiver 221, wherein:
  • the receiver 221 is configured to receive a second FI sent by another node on a time slot other than the time slot occupied by the first node to which the first node belongs, wherein the second FI is carried in the second FI The indication information of the period occupied by the gap;
  • the processor 222 is further configured to: according to the second FI received by the receiver 221, update a slot state table for characterizing the slot occupancy status currently maintained by the first node to which the UE belongs.
  • the receiver 221 is the same as the receiver 203 shown in FIG. 21, and the processor 222 is the same as the processor 201 shown in FIG. 21. Referring specifically to the receiver 203 and the processor 201 shown in FIG. The related description is not repeated here.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a particular computer capable of booting a computer or other programmable data processing device In a computer readable memory that operates in a computer readable memory, causing instructions stored in the computer readable memory to produce an article of manufacture comprising instruction means implemented in a block or in a flow or a flow diagram and/or block diagram of the flowchart The functions specified in the boxes.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请公开了一种时隙状态维护方法和装置,以满足在不同车辆节点密度下可靠的时隙资源分配,支持灵活的消息发送速率变化。方法包括:第一节点生成第一FI,并在自身占用的时隙上,将生成的第一FI发送给其他节点,该第一FI中携带用于表示时隙被占用的周期的指示信息。从而在不同节点占用时隙的周期不同的情况下,第一节点都能够将自己感知到的一跳节点、两跳节点的时隙占用信息准确的传递给周围节点,支持不同车辆密度场景中道路安全消息的发送。

Description

一种时隙状态维护方法和装置
本申请要求在2014年4月30日提交中国专利局、申请号为201410183572.8、发明名称为“一种时隙状态维护方法和装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域,特别涉及一种时隙状态维护方法和装置。
背景技术
随着车载通信系统的发展和移动自组网技术的逐渐成熟,为了实现对车辆的实时、动态、智能化管理,开发了车联网短程通信(Dedicated Short Range Communications,DSRC)技术。车辆节点间及车辆节点与路侧节点间通过DSRC,采用点对多点、点对点方式进行位置、速度、道路环境及设备状态等信息的双向交互,将车辆与车辆、车辆和路侧的信息采集设备有机的连接起来,当感知到危险道路状况发生时,及时向车辆告警,从而可以避免道路安全事故的发生。
基于时隙预约的时隙资源分配算法是一类采用分时复用方式且可以支持车联网DSRC通信的资源分配方法,包括可靠预留ALOHA(Reliable Reserved ALOHA,RR-ALOHA)、移动分时隙ALOHA(Mobile Slotted Aloha,MS-ALOHA)等。资源分配基于帧结构,以slot(时隙)为单位。如图1所示,每N个slot构成一个帧(Frame),每个帧中的slot的编号为0~N-1,在帧之间循环往复。本文中的时隙在标准或其它文献中也可以表述为“子帧”等。在同一时间每个slot只允许一个车辆发送数据,即车辆之间采用时分复用(Time Division Multiplex,TDM)。其基本思想如下:
当节点(如车载终端)加入网络时,需要先监听一帧时间长度内的空闲时隙资源,然后选择一个空闲时隙作为自己占用的时隙(即自占时隙),如果节点不主动放弃所占用的时隙资源,则可一直使用所占用的时隙传输数据,在这期间其他节点不能使用该时隙。在所占用的时隙上,节点需要周期性发送帧信息(Frame Information,FI),FI中携带该节点获得的与该节点相距约定跳数(如RR-ALOHA算法的FI中指示与发送节点相距一跳范围内的其他节点占用时隙的情况,又如MS-ALOHA算法指示与发送节点相距两跳范围内的其他节点占用时隙的情况)范围内的其他节点占用时隙的情况,指示该节点感知到的每个时隙的占用状况信息,每个时隙的占用状况信息包括:时隙占用状态、占用时隙的节点对应的临时资源标识(Source Temporary Identifier,STI;也称节点标识)、占用时隙的节点的优先级状态(也可以认为是占用时隙的节点在该时隙发送的数据对应的优先级)等信息,如图2所示。
对于MS-ALOHA算法,时隙占用状态信息可以表达时隙的四种占用状态:00表示时 隙为空闲状态,10表示时隙已被与本节点相距一跳的其他节点占用(简称为一跳节点占用)或本节点占用,11表示时隙已被与本节点相距两跳的其他节点占用(简称为两跳节点占用),01表示时隙已被其他两个以上的节点占用,即为碰撞状态;对于RR-ALOHA算法,虽然也可以指示4种时隙占用状态信息,但对每个状态的定义与MS-ALOHA算法不同。在非自身占用的时隙,每个节点通过监听相邻一跳的节点发送的FI,能够判断相邻一定跳数范围内(如对于RR-ALOHA算法是相邻两跳范围内,对于MS-ALOHA算法是相邻三跳范围内)每个节点占用时隙的情况,当发现本节点占用的时隙资源与其他节点使用的时隙资源发生碰撞时,释放自身所占用的时隙资源,重新预约新的空闲时隙作为自己的占用时隙。为方便后续描述,对FI及其内部信息内容统一采用如下描述方式:
节点发送的帧信息(FI)称为:FI消息,也可简称为FI;
FI中指示的每个时隙对应的状况信息称为:FI消息中每个时隙对应的时隙信息域;
FI中每个时隙对应的占用状况信息中给出的三类信息(即:时隙占用状态、STI、优先级信息)分别称为:每个时隙的时隙信息域中包含的时隙占用状态子域、STI子域、优先级子域;
FI发送时,通常当系统不确定绝对时间参考点情况下,FI中的第一个时隙信息域指示FI的发送时隙的时隙对应的时隙信息,第二个时隙信息域指示FI发送时隙的前一个时隙对应的时隙信息,依次类推;当系统确定绝对时间参考点的情况下,FI中各时隙信息域可以按约定方式排列,如FI中第一个时隙信息域对应时隙0。
时隙对应的检测域是指占用该时隙发送的FI中该时隙对应的时隙信息域,时隙对应的非检测域是指非占用该时隙发送的FI中该时隙对应的时隙信息域。
需要说明的是,上述描述方式只是为了后续描述方便而规定,当然也可以采用其他的描述方式。
基于时隙预约的时隙资源分配算法中,车辆节点通过时隙状态表(或称为时隙状态向量)(如图3所示)来维护一帧长度内每个时隙的状态,当车辆节点的发送时隙(包括自占时隙和申请时隙)到达时,车辆节点根据时隙状态表中记录的各个时隙的状态信息生成FI并发送,此外,车辆需要监听周围节点周期性发送的FI,并根据周围车辆发送的FI来更新自己维护的时隙状态表,从而获得当前相邻一定跳数范围内每个时隙占用情况。
为了通过FI更精确地发送时隙状态信息和更加准确地掌握时隙资源的占用状态,车辆节点可能会维护多个时隙状态表,如每个时隙状态表对应不同的发送时隙。采用基于时隙预约的时隙资源分配方式,每个节点可以可靠地周期性获得所需要的时隙资源,同时可以保证各节点接入信道的公平性。当车辆节点接收到其他车辆节点发送的FI时,根据接收到的FI中的各时隙对应的时隙信息域的内容对自身维护的时隙状态表中各时隙对应的时隙信息单元的内容进行更新,更新方式如图4所示。
目前,在车联网系统拥塞场景中,希望通过降低节点发送消息的速率,拉长节点使用时隙资源的周期,通过多个节点复用同一时隙来让系统能够容纳更多的节点,节点对时隙资源的使用周期需要能够支持按照基本的时隙资源维护周期长度(如100毫秒(ms))的整数倍变化,而现有的基于时隙状态表的时隙状态维护方法仅适用于系统中所有节点的发送速率相同且与时隙状态表维护周期相匹配情况下(即节点占用时隙的周期等于时隙状态表的维护周期)的时隙状态维护。为了满足在不同车辆节点密度下可靠的时隙资源分配,支持灵活的消息发送速率变化,需要对现有的时隙状态维护方式进行重新设计。
发明内容
本发明实施例公开了一种时隙状态维护方法和装置,以满足在不同车辆节点密度下可靠的时隙资源分配,支持灵活的消息发送速率变化。
本发明实施例提供一种时隙状态维护方法,该方法包括:
第一节点生成第一帧信息FI,其中,所述第一FI中携带用于表示时隙被占用的周期的指示信息;
第一节点在自身占用的时隙上,将生成的第一FI发送给其他节点。
在实施中,该方法还包括:第一节点在除自身占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态。
基于上述任一实施例,第一节点生成所述第一FI,包括:第一节点根据用于表征自身当前维护的时隙占用状态的时隙状态表,生成所述第一FI。
进一步,所述方法还包括:所述第一节点根据消息发送速率,确定自身的时隙状态表的维护周期;
其中,所述消息发送速率包括所述第一节点的消息发送速率、和/或其他节点的消息发送速率。
基于上述任一实施例,第一节点生成所述第一FI,包括:
第一节点在所述第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,
第一节点在所述第一FI中增加用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,
第一节点在所述第一FI中增加用于表示各时隙被占用的周期的指示信息。
进一步,所述第一节点在所述第一FI中增加用于表示发送所述第一FI的时隙被占用的周期的指示信息,包括:
所述第一节点在所述第一FI中增加新的信息域,所述新的信息域包含用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,
所述第一节点在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,
所述第一节点在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中的时隙占用状态子域、临时资源标识STI子域、或优先级子域中携带用于表示发送所述第一FI的时隙被占用的周期的指示信息。
基于上述任一实施例,所述第一节点生成所述第一FI,包括:
所述第一节点确定出用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于所述第一FI所能携带的时隙信息的个数的最大值;
所述第一节点将自身的时隙状态表划分成至少两个区段,每个区段内的时隙信息的个数不大于所述第一FI所能携带的时隙信息的个数的最大值;以及
所述第一节点在自身周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI。
进一步,所述第一节点在自身周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI并发送给其他节点,包括:
所述第一节点在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息;或者,
所述第一节点在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表所划分的区段的数量的第二提示信息;或者,
所述第一节点在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表的维护周期的第三提示信息。
在实施中,第一节点将自身的时隙状态表划分成至少两个区段,包括:
所述第一节点根据自身的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出自身的时隙状态表能够划分出的区段的个数;以及,
所述第一节点在自身的时隙状态表中,以设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个所述区段。
较佳地,所述设定的时隙为:
所述第一节点发送任一消息时所占用的时隙;或者,
所述第一节点发送指定的数据包时所占用的时隙;或者,
所述第一节点发送所述第一FI所占用的时隙;或者,
所述第一节点的时隙状态表中的第一个时隙。
在实施中,所述方法还包括:若所述第一节点的时隙状态表的维护周期发生变化,且 满足时隙状态表重置触发条件,所述第一节点重置自身的时隙状态表中的时隙信息的内容,并更新自身的时隙状态表的维护周期。
基于上述任一实施例,所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态,包括:
所述第一节点根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于自身已建立的用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围;
所述第一节点为自身已建立的时隙状态表,创建至少一个扩展时隙状态表;以及
所述第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,所述扩展时隙状态表满足下列条件中的至少一个条件:
所述扩展时隙状态表中包含的时隙信息的个数为所述已建立的时隙状态表中包含的时隙信息的个数的正整数倍;
所述扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息;
所述扩展时隙状态表中的时隙信息的格式与所述已建立的时隙状态表中的时隙信息的格式相同。
较佳地,所述第一节点根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围:
所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
所述第一节点接收到所述第二FI的时隙的位置信息;
发送所述第二FI的节点的时隙状态表的维护周期;
所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
进一步,第一节点确定发送所述第二FI的节点的时隙状态表的维护周期,包括:
所述第一节点根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,
所述第一节点根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的 节点的时隙状态表的维护周期。
在实施中,所述第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表,包括:
所述第一节点根据所述第二FI中所包含的未超出自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,
所述第一节点根据所述第二FI中所包含的超出了自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
进一步,所述第一节点更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表,包括:
所述第一节点根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;或者,
所述第一节点根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
在实施中,所述方法还包括:当所述已建立的时隙状态表满足时隙状态表重置触发条件时,所述第一节点重置所述已建立的时隙状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
较佳地,所述时隙状态表重置触发条件,包括:第一节点在自身占用的时隙上完成数据包的发送后,触发自身的时隙状态表的重置;或者,第一节点占用的时隙与其他节点占用的时隙发生碰撞后,触发自身的时隙状态表的重置;或者,第一节点中用于存储数据包的缓冲区中没有数据包发送时,触发自身的时隙状态表的重置;或者,第一节点的消息发送速率发生变化时,触发自身的时隙状态表的重置。
本发明实施例还提供了一种时隙状态维护方法,该方法包括:
第一节点在除自身占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态。
进一步,所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态,包括:
所述第一节点根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于自身已建立的用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围;
所述第一节点为自身已建立的时隙状态表,创建至少一个扩展时隙状态表;以及
所述第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,所述扩展时隙状态表满足下列条件中的至少一个条件:
所述扩展时隙状态表中包含的时隙信息的个数为所述已建立的时隙状态表中包含的时隙信息的个数的正整数倍;
所述扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息;
所述扩展时隙状态表中的时隙信息的格式与所述已建立的时隙状态表中的时隙信息的格式相同。
较佳地,所述第一节点根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围:
所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
所述第一节点接收到所述第二FI的时隙的位置信息;
发送所述第二FI的节点的时隙状态表的维护周期;
所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
在实施中,所述第一节点确定发送所述第二FI的节点的时隙状态表的维护周期,包括:
所述第一节点根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,
所述第一节点根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期。
在实施中,第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,包括:
所述第一节点根据所述第二FI中所包含的未超出自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,
所述第一节点根据所述第二FI中所包含的超出了自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
进一步,所述第一节点更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表,包括:
所述第一节点根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;或者,
所述第一节点根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
在实施中,所述方法还包括:当所述已建立的时隙状态表满足时隙状态表重置触发条件时,所述第一节点重置所述已建立的时隙状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
本发明提供了一种时隙状态维护装置,该装置应用于车联网系统中的任一节点设备(即第一节点)中,该装置包括:
第一处理模块,用于生成第一帧信息FI,其中,所述第一FI中携带用于表示时隙被占用的周期的指示信息;
发送模块,用于在自身所属的第一节点占用的时隙上,将所述第一处理模块生成的第一FI发送给其他节点。
在实施中,该装置还包括:接收模块,在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;以及
第二处理模块,用于根据所述接收模块接收到的第二FI,更新所述第一节点当前维护的时隙占用状态。
基于上述任一实施例,第一处理模块具体用于:根据用于表征所述第一节点当前维护的时隙占用状态的时隙状态表,生成所述第一FI。
较佳地,第一处理模块还用于:根据消息发送速率,确定所述第一节点的时隙状态表的维护周期;其中,所述消息发送速率包括所述第一节点的消息发送速率、和/或其他节点的消息发送速率。
基于上述任一实施例,第一处理模块具体用于:在所述第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在所述第一FI中增加用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,在所述第一FI中增加用于表示各时隙被占用的周期的指示信息。
进一步,第一处理模块具体用于:在所述第一FI中增加新的信息域,所述新的信息域包含用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中的时隙占用状态子域、STI子域、或优先级子域中携带用于表示发送所述第一FI的时隙被占用的周期的指示信息。
基于上述任一实施例,第一处理模块具体用于:确定出用于表征所述第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于所述第一FI所能携带的时隙信息的个数的最大值;将所述第一节点的时隙状态表划分成至少两个区段,每个区段内的时隙信息的个数不大于所述第一FI所能携带的时隙信息的个数的最大值;以及在所述第一节点周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI。
进一步,第一处理模块具体用于:在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息;或者,在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表所划分的区段的数量的第二提示信息;或者,在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表的维护周期的第三提示信息。
在实施中,第一处理模块具体用于:根据所述第一节点的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出所述第一节点当前维护的时隙状态表能够划分出的区段的个数;以及,在所述第一节点的时隙状态表中,以设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个所述区段。
在实施中,第一处理模块还用于:若所述第一节点的时隙状态表的维护周期发生变化,且满足时隙状态表重置触发条件,重置所述第一节点的时隙状态表中的时隙信息的内容,并更新所述第一节点的时隙状态表的维护周期。
基于上述任一实施例,第二处理模块具体用于:根据接收到的第二FI,确定出所述第 二FI中携带的时隙信息的个数大于所述第一节点已建立的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围;为所述第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收到的第二FI中携带的时隙信息,更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,第二处理模块根据以下至少一种信息,确定出需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围:
所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
所述第一节点接收到所述第二FI的时隙的位置信息;
发送所述第二FI的节点的时隙状态表的维护周期;以及,
所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
进一步,第二处理模块确定发送所述第二FI的节点的时隙状态表的维护周期,包括:根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期。
在实施中,第二处理模块具体用于:根据所述第二FI中所包含的未超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,根据所述第二FI中所包含的超出了所述第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
进一步,第二处理模块具体用于:根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;或者
根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新所述第一节点已建立的时隙状态表和/或所述已 建立的时隙状态表对应的扩展时隙状态表。
在实施中,第二处理模块还用于:当所述已建立的时隙状态表满足时隙状态表重置触发条件时,重置所述已建立的时隙状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
本发明还提供了一种时隙状态维护装置,该装置应用于车联网系统的任一节点设备(即第一节点)中,该装置包括:
接收模块,在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
第二处理模块,用于根据所述接收模块接收到的第二FI,更新所述第一节点当前维护的时隙占用状态。
在实施中,第二处理模块具体用于:根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于所述第一节点已建立的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围;为所述第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收到的第二FI中携带的时隙信息,更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,第二处理模块根据以下至少一种信息,确定出需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围:
所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
所述第一节点接收到所述第二FI的时隙的位置信息;
发送所述第二FI的节点的时隙状态表的维护周期;以及,
所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
进一步,第二处理模块确定发送所述第二FI的节点的时隙状态表的维护周期,包括:根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期。
在实施中,第二处理模块具体用于:根据所述第二FI中所包含的未超出所述第一节点 已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,根据所述第二FI中所包含的超出了所述第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
进一步,第二处理模块具体用于:根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;或者
根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
在实施中,第二处理模块还用于:当所述已建立的时隙状态表满足时隙状态表重置触发条件时,重置所述已建立的时隙状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
本发明实施例提供的一种节点设备(即第一节点),该第一节点为车载通信系统中的任一节点设备(如车载设备),该第一节点包括至少一个处理器、以及与该至少一个处理器连接的发射机,其中:
处理器被配置用于生成第一FI,该第一FI中携带用于表示时隙被占用的周期的指示信息。
发射机被配置用于在自身所属的第一节点占用的时隙上,将处理器生成的第一FI发送给其他节点。
在实施中,处理器被配置具体用于:根据用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表,生成第一FI。
较佳地,处理器还被配置用于:根据消息发送速率,确定自身所属的第一节点的时隙状态表的维护周期;其中,该消息发送速率包括自身所属的第一节点的消息发送速率、和/或其他节点的消息发送速率。
基于上述任一实施例,处理器被配置具体用于:在第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在第一FI中增加用于表示发送该第一FI的时隙被占用的周期的指示信息;或者,在第一FI中增加用于表示各时隙被占用的周期的指示信息。
进一步,处理器被配置具体用于:在第一FI中增加新的信息域,该新的信息域包含用于表示发送该第一FI的时隙被占用的周期的指示信息;或者,在第一FI中的发送该第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在第一FI中的发送该第一FI的时隙对应的时隙信息中的时隙占用状态子域、STI子域、或优先级子域中携带用于表示发送该第一FI的时隙被占用的周期的指示信息。
基于上述任一实施例,处理器被配置具体用于:确定出用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于第一FI所能携带的时隙信息的个数的最大值;将该第一节点的时隙状态表划分成至少两个区段,每个区段内的时隙信息的个数不大于第一FI所能携带的时隙信息的个数的最大值;以及在该第一节点周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI。
进一步,处理器被配置具体用于:在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息;或者,在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示自身所属的第一节点的时隙状态表所划分的区段的数量的第二提示信息;或者,在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示自身所属的第一节点的时隙状态表的维护周期的第三提示信息。
在实施中,处理器被配置根据如下方式将自身所属的第一节点的时隙状态表划分成至少两个区段:根据自身所属的第一节点的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出该第一节点当前维护的时隙状态表能够划分出的区段的个数;以及,在该第一节点的时隙状态表中,以设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个区段。
在实施中,处理器被配置具体用于:若自身所属的第一节点的时隙状态表的维护周期发生变化,且满足时隙状态表重置触发条件,重置该第一节点的时隙状态表中的时隙信息的内容,并更新该第一节点的时隙状态表的维护周期。
基于上述任一实施例,本发明实施例提供的节点设备还包括:
与处理器连接的接收机,被配置用于在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
处理器还被配置用于:根据接收机接收到的第二FI,更新用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表。
在实施中,处理器被配置具体用于:若接收机接收到的第二FI中携带的时隙信息的个数大于自身所属的第一节点已建立的时隙状态表的时隙信息的个数,或者,根据接收机接收到的第二FI确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙 状态表可维护的时隙信息的范围,则为自身所属的第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收机接收到的第二FI中携带的时隙信息,更新自身所属的第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,处理器被配置根据以下至少一种信息,确定出需要更新的时隙信息的范围超出第一节点已建立的时隙状态表可维护的时隙信息的范围:
第二FI中携带的用于指示时隙被占用的周期的指示信息;
根据第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
自身所属的第一节点接收到第二FI的时隙的位置信息;
发送第二FI的节点的时隙状态表的维护周期;以及,
第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送第二FI的节点的时隙状态表包含的区段的第一提示信息。
进一步,处理器确定发送第二FI的节点的时隙状态表的维护周期,包括:根据接收机接收到的第二FI中携带的用于表示发送该第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收机接收到的第二FI中携带的第一提示信息、以及用于表示发送该第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送该第二FI的节点的时隙状态表的维护周期。
在实施中,处理器被配置具体用于:根据第二FI中所包含的未超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表;以及,根据第二FI中所包含的超出了该第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表对应的扩展时隙状态表。
进一步,处理器被配置具体用于:根据第二FI中携带的各时隙信息的内容,以接收机接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表;或者,
根据第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收机203接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表。
在实施中,处理器还被配置用于:当已建立的时隙状态表满足时隙状态表重置触发条件时,重置该已建立的时隙状态表,并将该已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的该已建立的时隙状态表中包含的时隙信息中。
本发明还提供了一种节点设备(即第一节点),该第一节点为车载通信系统中的任一 节点设备,该第一节点包括接收机、以及与接收机连接的至少一个处理器,其中:
接收机被配置用于:在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
处理器还被配置用于:根据接收机接收到的第二FI,更新用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表。
在实施中,处理器被配置具体用于:若接收机接收到的第二FI中携带的时隙信息的个数大于自身所属的第一节点已建立的时隙状态表的时隙信息的个数,或者,根据接收机接收到的第二FI确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围,则为自身所属的第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收机接收到的第二FI中携带的时隙信息,更新自身所属的第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,处理器被配置根据以下至少一种信息,确定出需要更新的时隙信息的范围超出第一节点已建立的时隙状态表可维护的时隙信息的范围:
第二FI中携带的用于指示时隙被占用的周期的指示信息;
根据第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
自身所属的第一节点接收到第二FI的时隙的位置信息;
发送第二FI的节点的时隙状态表的维护周期;以及,
第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送第二FI的节点的时隙状态表包含的区段的第一提示信息。
进一步,处理器确定发送第二FI的节点的时隙状态表的维护周期,包括:根据接收机接收到的第二FI中携带的用于表示发送该第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收机接收到的第二FI中携带的第一提示信息、以及用于表示发送该第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送该第二FI的节点的时隙状态表的维护周期。
在实施中,处理器被配置具体用于:根据第二FI中所包含的未超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表;以及,根据第二FI中所包含的超出了该第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表对应的扩展时隙状态表。
进一步,处理器被配置具体用于:根据第二FI中携带的各时隙信息的内容,以接收机接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表;或者,
根据第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙 已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收机203接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表。
在实施中,处理器还被配置用于:当已建立的时隙状态表满足时隙状态表重置触发条件时,重置该已建立的时隙状态表,并将该已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的该已建立的时隙状态表中包含的时隙信息中。
本发明实施例提供的时隙状态维护方法和装置,在不同节点占用时隙的周期不同的情况下,第一节点均能够将自己感知到的一跳节点、两跳节点的时隙占用信息准确的传递给周围节点,支持不同车辆密度场景中道路安全消息的发送。
附图说明
图1为背景技术中提供的帧结构示意图;
图2为背景技术中提供的帧信息FI的结构示意图;
图3为背景技术中提供的时隙状态向量(表)的结构示意图;
图4为背景技术中提供的时隙状态向量(表)的更新方式示意图;
图5为本发明提供的一种时隙状态维护方法的示意图;
图6为本发明提供的一种时隙状态表的区段划分方法的示意图;
图7为本发明提供的实施例一中节点A维护的变长时隙状态表的示意图;
图8为本发明提供的实施例一中节点A维护的变长时隙状态表的区段1包含的时隙信息的示意图;
图9为本发明提供的实施例二中节点D维护的变长时隙状态表的示意图;
图10为本发明提供的实施例二中节点D维护的变长时隙状态表重置后的示意图;
图11为本发明提供的实施例二中各节点维护的时隙状态表的时序关系示意图;
图12为本发明提供的实施例二中节点D创建的扩展时隙状态表的示意图;
图13为本发明提供的实施例二中节点D更新后的扩展时隙状态表示意图;
图14为本发明提供的实施例三中节点D维护的变长时隙状态表重置后的示意图;
图15为本发明提供的实施例三中节点D更新后的变长时隙状态表示意图;
图16为本发明提供的另一种时隙状态维护方法的示意图;
图17为本发明提供的第一种时隙状态维护装置的示意图;
图18为本发明提供的第二种时隙状态维护装置的示意图;
图19为本发明提供的第三种时隙状态维护装置的示意图;
图20为本发明提供的第一种节点设备的示意图;
图21为本发明提供的第二种节点设备的示意图;
图22为本发明提供的第三种节点设备的示意图。
具体实施方式
下面结合说明书附图对本发明实施例作进一步详细描述。应当理解,此处所描述的实施例仅用于说明和解释本发明,并不用于限定本发明。
本发明实施例提供了一种时隙状态维护方法,应用于车载通信系统中,参见图5所示,包括:
步骤51、第一节点生成第一FI,其中,该第一FI中携带用于表示时隙被占用的周期的指示信息;
步骤52、第一节点在自身占用的时隙上,将自身生成的第一FI发送给其他节点。
本发明实施例中为了便于说明使用了“第一节点”这样的名词,该第一节点是指车载通信系统中的任一节点(如车载终端等)。
步骤52中,第一节点至少占用帧中的一个时隙用于向其他节点发送消息,该第一节点不需要在自身占用的每个时隙到达时都向其他节点发送第一FI,可以只是在自身占用的部分时隙上发送第一FI。
第一节点周期性占用时隙,该周期可以为帧周期(如100ms),也可以为用于表征自身当前维护的时隙占用状态的时隙状态表的维护周期,等等。
需要说明的是,本发明实施例中均以时隙状态表来表征第一节点当前维护的时隙占用状态为例进行说明,但是本发明实施例并不限于采用时隙状态表的方式来表征第一节点当前维护的时隙占用状态,也可以采用其他方式来表征第一节点当前维护的时隙占用状态。
本发明实施例中,第一节点生成第一FI,并在自身占用的时隙上,将自身生成的第一FI发送给其他节点,其中,该第一FI中携带用于表示时隙被占用的周期的指示信息。从而在不同节点占用时隙的周期不同的情况下,第一节点都能够将自己感知到的一跳节点、两跳节点的时隙占用信息准确的传递给周围节点,支持不同车辆密度场景中道路安全消息的发送。
本发明实施例中,第一FI中携带用于表示时隙被占用的周期的指示信息,和/或第二FI中携带用于表示时隙被占用的周期的指示信息的内容可以为时隙被占用的周期信息,也可以为占用时隙的节点在该时隙上发送业务的速率。
举例说明,如,节点A以200ms占用时隙6,则该时隙6对应的指示信息的内容可以为200ms;
又如,设定不同类型的业务的发送速率与时隙被占用的周期之间的对应关系,此时,若节点B占用时隙8发送实时业务,则该时隙8对应的指示信息的内容可以为节点B在时隙8发送实时业务的速率。
在实施中,步骤51具体为:第一节点根据用于表征自身当前维护的时隙占用状态的 时隙状态表,生成第一FI。
进一步,该方法还包括:第一节点根据消息发送速率,确定自身的时隙状态表的维护周期,并以确定的维护周期维护自身的时隙状态表。
在实施中,第一节点的时隙状态表的维护周期和时隙长度一旦确定后,该时隙状态表中所包含的时隙信息的个数也就确定了,例如,第一节点的时隙状态表的维护周期为200ms,时隙长度为1ms,则第一节点的时隙状态表中包含200个时隙对应的时隙信息。
为了支持不同节点占用时隙的周期变化,较佳地,第一节点所维护的时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息,如增加“占用周期”子单元,用于指示各时隙被占用的周期。
较佳地,时隙状态表中的每个时隙信息包含的指示信息的内容可以为时隙被占用的周期信息,也可以为占用时隙的节点在该时隙上发送业务的速率。
由于不同节点的消息发送速率有可能不同,因此,不同节点确定出的自身的时隙状态表的维护周期也有可能不同,不同节点的时隙状态表中包含的时隙信息的个数也有可能不同,从而使得各节点维护的时隙状态表可以支持周期变化的时隙资源预约。
在实施中,第一节点根据消息发送速率,确定自身的时隙状态表的维护周期,包括以下三种方式:
1、第一节点根据自身当前的消息发送速率,确定自身的时隙状态表的维护周期。
该方式下,第一节点先根据自身当前的消息发送速率,确定自身发送消息的发送周期,再根据所确定的发送周期,确定自身的时隙状态表的维护周期,此时,第一节点的时隙状态表的维护周期与自身发送消息的发送周期相同。
2、第一节点根据其他节点的消息发送速率,确定自身的时隙状态表的维护周期,其中,该第一节点根据接收到的其他节点发送的消息,确定出其他节点的消息发送速率。
该方式下,第一节点先根据收到的其他节点(如一跳范围内的节点)发送的消息,确定出其他节点发送消息的发送周期,再根据其他节点发送消息的发送周期,确定出自身的时隙状态表的维护周期。
举例说明,第一节点从确定出的其他节点发送消息的发送周期中,选择最大的发送周期作为自身的时隙状态表的维护周期。
3、第一节点根据自身的消息发送速率和其他节点的消息发送速率,确定自身的时隙状态表的维护周期,其中,该第一节点根据接收到的其他节点发送的消息,确定出其他节点的消息发送速率。
举例说明,第一节点根据自身当前的消息发送速率,确定自身发送消息的发送周期,以及第一节点根据收到的其他节点(如一跳范围内的节点)发送的消息,确定出其他节点发送消息的发送周期;第一节点从确定出的自身发送消息的发送周期和确定出的其他节点 发送消息的发送周期中,选择最大的发送周期作为自身的时隙状态表的维护周期。
在实施中,步骤51中,第一节点生成的第一FI中携带用于指示时隙被占用的周期的指示信息的实现方式,包括以下几种:
方式1、第一节点在该第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息。
该方式下,第一节点可以在第一FI中每个时隙对应的时隙信息域中均增加“占用周期”子域,以指示该时隙被各节点所占用的周期。
方式2、第一节点在该第一FI中增加用于表示发送该第一FI的时隙被占用的周期的指示信息。
该方式进一步包括以下三种优选的实现方式:
1)第一节点在第一FI中增加新的信息域,该新的信息域包含用于表示发送该第一FI的时隙被占用的周期的指示信息,即在第一FI中除各时隙对应的时隙信息域之外,再额外增加一个信息域,该信息域中的内容为发送该第一FI的时隙被占用的周期。
2)第一节点在第一FI中的发送该第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息,即在第一FI中发送该第一FI的时隙对应的时隙信息域中增加“占用周期”子域,以指示该时隙被占用的周期。
3)第一节点在第一FI中的发送该第一FI的时隙对应的时隙信息中的时隙占用状态子域、STI子域、或优先级子域中携带用于表示发送该第一FI的时隙被占用的周期的指示信息,即将第一FI中的发送该第一FI的时隙对应的时隙信息域中的现有子域指示的信息内容替换为指示当前发送该第一FI的时隙被占用的周期的指示信息。
方式3、第一节点在该第一FI中增加用于表示各时隙被占用的周期的指示信息。
该方式下,第一节点可以在第一FI中除各时隙对应的时隙信息域外,增加专门的时隙占用周期字段,集中用于表示各时隙被占用的周期的指示信息。
在实施中,第一节点可以采用上述方式1~方式3中的任一方式在第一FI中携带用于指示时隙被占用的周期的指示信息。
基于上述任一实施例,受到帧信息长度的限制,有可能出现用于表征第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于需要发送的第一FI所能携带的时隙信息的个数的最大值,在这种场景下,步骤51中,第一节点生成第一FI,包括:
第一节点确定出用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于第一FI所能携带的时隙信息的个数的最大值;
第一节点将自身的时隙状态表划分成至少两个区段,其中,每个区段内的时隙信息的个数不大于第一FI所能携带的时隙信息的个数的最大值;以及,
第一节点在自身周期性占用的时隙上,根据该至少两个区段中的一个区段所包含的时 隙信息,生成第一FI。
具体的,当第一节点的时隙状态表中时隙信息的长度(即时隙信息的个数)超出第一FI中可以携带时隙信息的长度时,则第一节点生成的第一FI可以采用轮循方式每次通过第一FI发送该第一节点的时隙状态表中的部分时隙信息,即第一节点将自身的时隙状态表划分成至少两个区段,每次通过第一FI仅发送一个区段所包含的时隙信息。
举例说明,第一节点的时隙状态表的维护周期为300ms,假设时隙长度为1ms,则该时隙状态表中包含300个时隙的时隙信息,假设第一FI中可以携带时隙信息的长度为100个时隙,则将时隙状态表按照每100个时隙为单位划分成三个区段(part),即part1~part3,如图6所示。第一节点每次在自身占用的时隙(周期性占用某个时隙)上,发送的第一FI对应不同part的时隙信息,如第一节点在第一个周期性占用的时隙上发送的第一FI对应该第一节点当前所维护的时隙状态表中的part1的时隙信息,在第二个周期性占用的时隙上发送的第一FI对应该第一节点当前所维护的时隙状态表中的part2的时隙信息,在第三个周期性占用的时隙上发送的第一FI对应该第一节点当前所维护的时隙状态表中的part3的时隙信息,在第四个周期性占用的时隙上发送的第一FI对应该第一节点当前所维护的时隙状态表中的part1的时隙信息,…依次类推。
图6中第一节点的时隙状态表中的时隙号采用0~99进行编号,当然也可以采用0~299进行编码。由于各时隙的编号只是节点内部对时隙的标识,并不向外发送,第一节点的时隙状态表中的时隙号的编号方式进行限定。
为了使接收到第一FI的节点能够获知该第一FI所对应的区段,进一步,第一节点在自身周期性占用的时隙上,根据该至少两个区段中的一个区段所包含的时隙信息,生成第一FI,包括:
第一节点在所生成的第一FI中携带用于表示本次发送的第一FI中携带的时隙信息对应的区段的提示信息;或者
第一节点在所生成的第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示第一节点的时隙状态表所划分的区段的数量的第二提示信息,以使接收到该第一FI的节点能够根据第一提示信息和第二提示信息确定出该第一节点的时隙状态表的维护周期;或者
第一节点在所生成的第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示该第一节点的时隙状态表的维护周期的第三提示信息,以使接收到该第一FI的节点能够根据第三提示信息获知该第一节点的时隙状态表的维护周期。
具体的,第一节点可以采用如下方式在第一FI中携带第一提示信息、第二提示信息或第三提示信息:
1)第一节点在第一FI中增加新的信息域,该新的信息域包含第一提示信息、第二提示信息和第三提示信息中的至少一种信息。
2)第一节点在第一FI中的发送该第一FI的时隙对应的时隙信息中增加新的子域,以携带第一提示信息、第二提示信息和第三提示信息中的至少一种信息。
上述只是列举了两种优选的方式,当然,第一节点也可以采用其他方式在第一FI中携带第一提示信息、第二提示信息和第三提示信息中的至少一种信息,本发明实施例不对具体实现方式进行限定。
在实施中,第一节点将自身的时隙状态表划分成至少两个区段,具体包括:
第一节点根据自身的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出自身当前维护的时隙状态表能够划分出的区段的个数;以及,
第一节点以自身的时隙状态表中设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个区段。
基于上述区段划分方式,第一节点以自身的时隙状态表中设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个区段,包括:第一节点在自身的时隙状态表中,以设定的时隙为起始点向前或向后,按照设定的单个区段内能够包含的时隙信息的个数,依次划分出各个区段。
基于上述区段划分方式,设定的时隙包括但不限于以下时隙中的一种:
第一节点发送任一消息时所占用的时隙;
第一节点发送指定的数据包时所占用的时隙,如第一节点发送指定业务的初始数据包时所占用的时隙;
第一节点发送第一FI所占用的时隙;
第一节点的时隙状态表中的第一个时隙。
其中,第一节点在进行区段划分时,具体采用上述哪个设定的时隙作为起始点,可以由第一节点与其他节点预先约定,也可以由第一节点确定后通知给其他节点,还可以由网络侧预先配置给各节点。
基于上述任一实施例,该方法还包括:若第一节点的时隙状态表的维护周期发生变化,且满足时隙状态表重置触发条件,则该第一节点重置自身的时隙状态表中的时隙信息的内容,并更新自身的时隙状态表的维护周期。
其中,第一节点重置自身的时隙状态表中的时隙信息的内容,即第一节点将自身当前的时隙状态表中的各时隙信息的内容清空或仅保留自身占用的时隙对应的时隙信息。
在实施中,时隙状态表重置触发条件包括但不限于以下条件中的一种:
第一节点在自身占用的时隙上完成数据包的发送后,触发自身的时隙状态表的重置;
第一节点占用的时隙与其他节点占用的时隙发生碰撞后,触发自身的时隙状态表的重 置;
第一节点中用于存储数据包的缓冲区中没有数据包发送时,触发自身的时隙状态表的重置;
第一节点的消息发送速率发生变化时,触发自身的时隙状态表的重置。
基于上述任一实施例,该方法还包括:
步骤53、第一节点在除自身占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,第二FI中携带用于表示时隙被占用的周期的指示信息;
步骤54、第一节点根据接收到的第二FI,更新自身当前维护的时隙占用状态。
在实施中,步骤54具体为:第一节点根据接收到的第二FI,更新用于表征自身当前维护的时隙占用状态的时隙状态表。
进一步,作为一种可能的实现方式,第一节点根据接收到的第二FI,更新自身的时隙状态表,包括:
第一节点根据接收到的第二FI,确定出该第二FI中携带的时隙信息的个数大于自身已建立的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围;
第一节点为自身已建立的时隙状态表,创建至少一个扩展时隙状态表;
第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表。
较佳地,该至少一个扩展时隙状态表中包含的时隙信息的个数为第一节点已建立的时隙状态表中包含的时隙信息的个数的正整数倍。也就是说,第一节点创建的扩展时隙状态表所包含的时隙信息的个数可以与第一节点已建立的时隙状态表中包含的时隙信息的个数相同,也可以大于第一节点已建立的时隙状态表中包含的时隙信息的个数。
较佳地,该至少一个扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息。
较佳地,该至少一个扩展时隙状态表中的时隙信息的格式与第一节点已建立的时隙状态表中的时隙信息的格式相同。
基于上述任一实施例,在实施中,第一节点可根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围:
接收到的第二FI中携带的用于指示时隙被占用的周期的指示信息;
第一节点根据接收到的第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息(如时隙编号);
第一节点接收到第二FI的时隙的位置信息;
发送第二FI的节点的时隙状态表的维护周期;以及,
接收到的第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送该第二FI的节点的时隙状态表包含的区段的第一提示信息。
举例说明,第一节点可以根据第二FI中携带的指示信息以及接收到第二FI的时隙的位置信息,确定出需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围,具体的:第一节点先确定接收到第二FI的时隙的位置信息(即第一节点确定出接收到第二FI的时隙在自身的时隙状态表中的位置);然后确定出该第二FI中时隙占用状态子域指示时隙已被占用的时隙信息对应的时隙位置;再针对该第二FI中时隙占用状态子域指示时隙已被占用的时隙信息,第一节点根据该时隙信息中用于指示时隙被占用的周期的指示信息,确定该时隙信息对应的时隙被占用的周期,并根据自身的时隙状态表的维护周期以及确定出的该时隙信息对应的时隙被占用的周期,确定出该时隙信息是否超出自身已建立的时隙状态表可维护的时隙信息的范围。如,确定出的该时隙信息对应的时隙最近一次被占用的时间点和下一次被占用时间点都超出第一节点的时隙状态表的可维护时隙范围时,则该时隙信息超出第一节点已建立的时隙状态表可维护的时隙信息的范围。
又如,第一节点可以根据第二FI中携带的第二提示信息、第一提示信息、时隙占用状态指示信息、用于表示时隙被占用的周期的指示信息、以及接收到第二FI的时隙,确定第二FI中指示的被占用时隙最近一次被占用的时间点和下一次被占用的时间点都超出第一节点的时隙状态表的可维护时隙范围时,则确定该时隙信息超出第一节点已建立的时隙状态表可维护的时隙信息的范围。具体为:先根据第二提示信息和第一提示信息确定接收到的第二FI中携带的各时隙信息对应的时间点,然后根据第二FI中携带的各时隙信息中的时隙占用状态信息确定被占用时隙最近一次被占用的时间点,根据被占用时隙对应的指示信息确定该时隙下一次被占用的时间点,当发现任一时隙最近一次被占用的时间点和下一次被占用的时间点都超出第一节点的时隙状态表可维护的时隙范围时,则确定该时隙对应的时隙信息超出第一节点已建立的时隙状态表可维护的时隙信息的范围。
在实施中,第一节点根据以下方式确定发送第二FI的节点的时隙状态表的维护周期:
第一节点根据接收到的第二FI中携带的用于表示发送该第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送该第二FI的节点的时隙状态表的维护周期;或者,
第一节点根据接收到的第二FI中携带的第一提示信息、以及用于表示发送该第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送该第二FI的节点的时隙状态表的维护周期。
具体的,第一节点根据接收到的第二FI中携带的第一提示信息和第二提示信息,确定发送该第二FI的节点的时隙状态表的维护周期具体为:将每个区段所维护的时隙信息的个数乘以时隙长度,再乘以所划分的区段的数量,即可得到发送该第二FI的节点的时隙状态表的维护周期。
基于上述任一实施例,在实施中,第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,包括:
第一节点根据接收到的第二FI中所包含的未超出自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新自身已建立的时隙状态表;以及第一节点根据接收到的第二FI中所包含的超出了自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新该已建立的时隙状态表对应的扩展时隙状态表。
进一步,第一节点根据接收到的第二FI中携带的时隙信息,采用如下任一方式,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表:
方式一、第一节点根据接收到的第二FI中携带的各时隙信息的内容,以接收到该第二FI的时隙在自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表。
该方式下,第一节点根据接收到的第二FI中携带的每个时隙信息的内容,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,即第一节点在更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表时,需要遍历第二FI中携带的每个时隙信息。
方式二、第一节点根据接收到的第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到该第二FI的时隙在自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表。
该方式下,第一节点先确定出接收到的第二FI中时隙占用状态子域指示时隙已被占用的时隙信息,再根据确定出的时隙信息,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,即第一节点在更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表时,只需遍历确定出的时隙信息。
基于上述任一实施例,该方法还包括:当第一节点已建立的时隙状态表满足时隙状态表重置触发条件时,该第一节点重置该已建立的时隙状态表,并将该已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的已建立的时隙状态表中包含的时隙信息中。
具体的,若该第一节点仅创建了一个扩展时隙状态表,则第一节点重置该已建立的时隙状态表后,将该扩展时隙状态表中包含的时隙信息的内容更新至重置后的已建立的时隙状态表中包含的时隙信息中;若该第一节点创建了至少两个扩展时隙状态表,则第一节点重置该已建立的时隙状态表后,将时隙位置与该已建立的时隙状态表相邻的扩展时隙状态 表(即创建的第一个扩展时隙状态表)中包含的时隙信息的内容更新至重置后的已建立的时隙状态表中包含的时隙信息中。
下面结合以下四个具体实施例,对本发明提供的时隙状态表的维护方法进行说明。
实施例一、本实施例主要描述的是节点A发送FI的过程。具体如下:
1、节点A根据速率控制机制确定自身发送的道路安全消息的发送周期为200ms,进而确定出自身维护的变长时隙状态表(即自身维护的时隙状态表,为了区别于采用现有方式确定的维护周期的时隙状态表,此处定义为变长时隙状态表)的维护周期也为200ms。
2、假设每个时隙长度为1ms,节点A维护的变长时隙状态表需要记录200个时隙的信息。节点A维护的变长时隙状态表格式为如图7所示,变长时隙状态表中每个时隙对应的时隙信息单元记录信息包括:时隙编号、时隙占用状态、占用时隙节点对应的STI、节点在该时隙上发送的业务对应的优先(或占用该时隙的节点的优先级)、节点占用该时隙的周期;
3、由于节点发送的FI的长度限制,节点A发送的FI中可以携带100个时隙的时隙信息,因此需要将该变长时隙状态表分为两个区段(part),节点A每次发送的FI中只能发送其当前维护的变长时隙状态表中某个区段对应的时隙信息。假设节点A以200ms为周期占用时隙6,区段划分方式采用从节点A的时隙6开始向前100个时隙划分为区段1(part1),剩余的100个时隙划分为区段2(part2),如图7所示。
4、当节点A以200ms为周期占用的时隙6到达时,节点A根据预设的策略确定此次发送的FI对应的区段,假设此次发送的FI对应的区段为区段1,则节点A将其变长时隙状态表中区段1中的时隙信息映射为FI携带的时隙信息。变长时隙状态表中区段1包含的时隙信息的内容如图8所示,变长时隙状态表中记录的时隙信息到FI中携带的时隙信息的映射方式不属于本发明的内容,在此不做详细描述,一种简单的映射方式是FI携带的时隙信息采用和时隙状态表中记录的时隙信息相同。
实施例二、本实施例主要描述的是节点D接收到节点A发送的FI后,维护自身的变长时隙状态表的过程。假设节点D的变长时隙状态表(即节点D所维护的时隙状态表,为了区别于采用现有方式确定的维护周期的时隙状态表,此处定义为变长时隙状态表)的维护周期为100ms(假设时隙长度为1ms,则其维护周期对应100个时隙),节点D接收到上述节点A发送的FI后维护自身的变长时隙状态表的过程如下:
1、节点D维护的变长时隙状态表的格式与节点A相同,由于节点D的变长时隙状态表的维护周期为100ms,因此其变长时隙状态表中包含100个时隙(如图9所示)。假设节点D以100ms为周期占用时隙99,在时隙99发送完自己的FI重置变长时隙状态表后,在时隙6到达前未接收到其他节点发送的FI信息,即在时隙6前节点D的变长时隙状态表中除了自己的时隙信息外,其他的时隙均为空闲(如图10所示)。
2、节点D在时隙6接收到节点A发送的FI,其中,节点A发送的FI是根据图8所示的区段所包含的时隙信息的内容生成的。
3、节点D根据FI中检测域信息(即时隙6对应的时隙信息中的用于指示时隙被占用的周期的指示信息)判断,节点A维护的变长时隙状态表的周期为200ms,并根据节点A发送的FI中携带的该FI对应区段的第一提示信息确定该FI中携带的时隙信息对应节点A维护的变长时隙状态表的part1所包含的时隙信息的内容。
4、节点D根据获得的FI对应的区段信息以及接收FI的时隙位置(即时隙6),确定FI中各时隙被占用的周期,从而确定出各时隙被占用的确切时间,并对自身维护的变长时隙状态表和创建的扩展时隙状态表中对应的时隙信息进行更新:
1)由于节点D在时隙6接收到节点A发送的FI中携带的时隙信息对应节点A维护的变长时隙状态表的part1,根据约定的区段分割规则(即从节点A以200ms为周期占用的时隙6开始向前每100个时隙划分为一个区段),确定出接收到的FI中的时隙6对应的时隙信息指示当前的接收时隙6的状态。节点D根据接收到的FI中时隙6对应的时隙占用信息子域(即用于表示时隙被占用的周期的指示信息),可知节点A以200ms为周期占用时隙6;节点D根据时隙6对应的优先级子域,可知节点A在时隙6上发送的业务对应的优先为2(或节点A的优先级为2)。节点D根据确定的FI中时隙6的时隙信息更新节点D维护的变长时隙状态表中时隙6的时隙信息,具体的:由于FI中时隙6对应的时隙信息为检测域信息,因此,节点D将自身维护的变长时隙状态表中时隙6的占用状态子单元置为一跳节点占用(10),优先级子单元置为1(00),STI子单元填充节点A对应的STI(00000001),占用周期子单元置为200(10)。
2)节点A发送的FI中指示第二个被占用的时隙为时隙1。节点D确定时隙1在自身维护的变长时隙状态表中的位置(如图11所示),根据FI中时隙1指示的时隙信息更新自身维护的变长时隙状态表中时隙对应的时隙信息。由于时隙1为非检测域时隙,则节点D将自身的变长时隙状态表中时隙1的占用状态子单元指示为两跳节点占用(11),优先级子单元置为2(10),STI子单元置为节点B对应的STI(00000010),占用周期子单元置为100(00)。
3)节点A发送的FI中指示第三个被占用的时隙为时隙8。节点D确定时隙8在指示维护的变长时隙状态表中的位置,由图11可知时隙8对应的实际占用时间点已超出了节点D维护的变长时隙状态表对应的时间范围,为了使节点C占用的时隙8的信息能够被节点D感知,需要节点D创建扩展时隙状态表,创建的扩展时隙状态表采用与变长时隙状态表相同的格式,各时隙的占用状态均为空闲状态(如图12所示)。节点D根据FI中携带的时隙8被占用的周期信息(即用于表示时隙8被占用的周期的指示信息),更新扩展时隙状态表中对应的时隙信息。节点D的扩展时隙状态表中确定的时隙8下次占用的位置如图 11所示,更新对应的时隙状态信息。由于时隙8为非检测域时隙,则节点D将扩展时隙状态表中时隙8的占用状态子单元置为两跳节点占用(11),优先级子单元置为2(10),STI子单元置为节点B对应的STI(00000011),占用周期子单元置为200(01),更新后的扩展时隙状态表如图13所示。
实施例三、本实施例主要描述的是扩展时隙状态表记录的信息赋值给变长时隙状态表的过程。
1、节点D以100ms为周期占用时隙99发送数据,假设在时隙99到达前,节点D根据从周围一跳节点接收的FI,判断自身占用的时隙99没有发生碰撞,则节点D在时隙99到达后且在时隙99发送完对应FI后,重置自己的变长时隙状态表(重置后的变长时隙状态表如图14所示);
2、节点D查看是否存在记录有与下一个100ms时间段的时隙信息的扩展时隙状态表。以实施例二所述场景为例,节点D确定当前存在记录有与下一个100ms时间段时隙信息的扩展时隙状态表。
3、节点D将扩展时隙状态表中记录的时隙信息按时序对应关系更新到重置后的变长时隙状态表中,更新后的变长时隙状态表如图15所示。
4、节点D将无效的扩展时隙状态表清除。本实施例中,扩展时隙状态表中记录的内容可以完全更新到重置后的变长时隙状态表中,因此在更新完成后可以将扩展时隙状态表清除。
实施例四、本实施例主要描述的是变长时隙状态表的长度变化过程。
1、假设节点D以100ms为周期占用时隙99发送数据,若在时隙80时刻,节点D的高层根据检测到的时隙资源占用情况,确定需要将消息发送周期由当前的100ms变为200ms,以便让更多的节点接入。
2、节点D判断需要将自身当前维护的变长时隙状态表的周期由100ms变为200ms。
3、假设在节点D的时隙99到达前,根据从周围一跳节点接收的FI判断自身占用的时隙99没有发生碰撞,则在时隙99到达后且在时隙99发送完对应FI后,重置自己的变长时隙状态表,并将变长时隙状态表的维护周期由100ms变为200ms,维护的时隙信息个数由100变为200。节点D在接收到其他节点发送的FI时,将根据接收到的FI维护新的变长时隙状态表中对应的时隙信息。
上述方法处理流程可以用软件程序实现,该软件程序可以存储在存储介质中,当存储的软件程序被调用时,执行上述方法步骤。
以上描述了车联网系统中的任一节点(即第一节点)可以仅执行步骤51~步骤52所描述的处理过程,也可以执行步骤51~步骤54所描述的处理过程。在实施中,第一节点也可以仅执行步骤53~步骤54所描述的处理过程。
基于同一发明构思,本发明实施例提供了另一种时隙状态维护方法,参见图16所示,该方法包括:
步骤161、第一节点在除自身占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,该第二FI中携带用于表示时隙被占用的周期的指示信息;
步骤162、第一节点根据该第二FI,更新自身当前维护的时隙占用状态。
由于步骤161的处理过程与上述步骤53所描述的处理过程相同,且步骤162的处理过程与上述步骤54所描述的处理过程相同,具体可参见上述步骤53和步骤54的描述。
在实施中,作为一种可能的实现方式,步骤162具体为:
第一节点根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于自身已建立的用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围;
第一节点为自身已建立的时隙状态表,创建至少一个扩展时隙状态表;
第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,该至少一个扩展时隙状态表中包含的时隙信息的个数为第一节点已建立的时隙状态表中包含的时隙信息的个数的正整数倍。也就是说,第一节点创建的扩展时隙状态表所包含的时隙信息的个数可以与第一节点已建立的时隙状态表中包含的时隙信息的个数相同,也可以大于第一节点已建立的时隙状态表中包含的时隙信息的个数。
较佳地,该至少一个扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息。
较佳地,该至少一个扩展时隙状态表中的时隙信息的格式与第一节点已建立的时隙状态表中的时隙信息的格式相同。
在实施中,所述第一节点根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围:
接收到的第二FI中携带的用于指示时隙被占用的周期的指示信息;
第一节点根据接收到的第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息(如时隙编号);
第一节点接收到第二FI的时隙的位置信息;
发送第二FI的节点的时隙状态表的维护周期;以及,
接收到的第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送该第二FI的节点的时隙状态表包含的区段的第一提示信息。
在实施中,第一节点根据以下方式确定发送第二FI的节点的时隙状态表的维护周期:
第一节点根据接收到的第二FI中携带的用于表示发送该第二FI的节点的时隙状态表 的维护周期的第三提示信息,确定发送该第二FI的节点的时隙状态表的维护周期;或者,
第一节点根据接收到的第二FI中携带的第一提示信息、以及用于表示发送该第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送该第二FI的节点的时隙状态表的维护周期。
基于上述任一实施例,在实施中,第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,包括:
第一节点根据接收到的第二FI中所包含的未超出自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新该已建立的时隙状态表;
第一节点根据接收到的第二FI中所包含的超出了自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新该已建立的时隙状态表对应的扩展时隙状态表。
进一步,第一节点根据接收到的第二FI中携带的时隙信息,采用如下任一方式,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表:
方式一、第一节点根据接收到的第二FI中携带的各时隙信息的内容,以接收到该第二FI的时隙在自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表。
方式二、第一节点根据接收到的第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到该第二FI的时隙在自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新自身已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表。
基于上述任一实施例,该方法还包括:当第一节点已建立的时隙状态表满足时隙状态表重置触发条件时,该第一节点重置该已建立的时隙状态表,并将该已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的已建立的时隙状态表中包含的时隙信息中。
基于同一发明构思,本发明实施例还提供一种时隙状态表的维护装置,应用于车载通信系统的任一节点设备(记为第一节点)中,参见图17所示,该装置包括:
第一处理模块171,生成第一FI,其中,所述第一FI中携带用于表示时隙被占用的周期的指示信息;
发送模块172,用于在自身所属的第一节点占用的时隙上,将所述第一处理模块生成的第一FI发送给其他节点。
本发明实施例提供的装置,生成携带用于表示时隙被占用的周期的指示信息的第一FI,并在第一节点占用的时隙上,将所述第一处理模块生成的第一FI发送给其他节点。在 不同节点占用时隙的周期不同的情况下,均能够将自己感知到的一跳节点、两跳节点的时隙占用信息准确的传递给周围节点,支持不同车辆密度场景中道路安全消息的发送。
本发明实施例中,第一FI中携带用于表示时隙被占用的周期的指示信息,和/或第二FI中携带用于表示时隙被占用的周期的指示信息的内容可以为时隙被占用的周期信息,也可以为占用时隙的节点在该时隙上发送业务的速率。
在实施中,第一处理模块171具体用于:根据用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表,生成第一FI。
进一步,第一处理模块171还用于:根据消息发送速率,确定自身所属的第一节点的时隙状态表的维护周期;其中,该消息发送速率包括自身所属的第一节点的消息发送速率、和/或其他节点的消息发送速率,具体参见方法部分的描述,此处不再赘述。
为了支持不同节点占用时隙的周期变化,较佳地,第一节点所维护的时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息,如增加“占用周期”子单元,用于指示各时隙被占用的周期。较佳地,时隙状态表中的每个时隙信息包含的指示信息的内容可以为时隙被占用的周期信息,也可以为占用时隙的节点在该时隙上发送业务的速率。
在实施中,第一处理模块171具体用于:在第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息,具体参见上述方式1,此处不再赘述;或者,在第一FI中增加用于表示发送该第一FI的时隙被占用的周期的指示信息,具体参见上述方式2,此处不再赘述;或者,在第一FI中增加用于表示各时隙被占用的周期的指示信息,具体参见上述方式3,此处不再赘述。
进一步,第一处理模块171具体用于:在第一FI中增加新的信息域,该新的信息域包含用于表示发送该第一FI的时隙被占用的周期的指示信息;或者,在第一FI中的发送该第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在第一FI中的发送该第一FI的时隙对应的时隙信息中的时隙占用状态子域、STI子域、或优先级子域中携带用于表示发送该第一FI的时隙被占用的周期的指示信息。
基于上述任一实施例,受到帧信息长度的限制,有可能出现用于表征第一处理模块171所属的第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数,大于需要发送的第一FI所能携带的时隙信息的个数的最大值,在这种场景下,第一处理模块171具体用于:
确定出用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于第一FI所能携带的时隙信息的个数的最大值;将该第一节点的时隙状态表划分成至少两个区段,每个区段内的时隙信息的个数不大于第一FI所能携带的时隙信息的个数的最大值;以及在该第一节点周期性占用的时隙上,根据所述至少两个区段中的一个 区段所包含的时隙信息,生成第一FI并发送给其他节点。
为了使接收到第一FI的节点能够获知该第一FI所对应的区段,进一步,第一处理模块171具体用于:
在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息;或者,在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示自身所属的第一节点的时隙状态表所划分的区段的数量的第二提示信息;或者,在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示自身所属的第一节点的时隙状态表的维护周期的第三提示信息。
具体的,第一处理模块171可以采用如下方式在第一FI中携带第一提示信息、第二提示信息或第三提示信息:
1)在第一FI中增加新的信息域,该新的信息域包含第一提示信息、第二提示信息和第三提示信息中的至少一种信息。
2)在第一FI中的发送该第一FI的时隙对应的时隙信息中增加新的子域,以携带第一提示信息、第二提示信息和第三提示信息中的至少一种信息。
上述只是列举了两种优选的方式,当然,第一处理模块171也可以采用其他方式在第一FI中携带第一提示信息、第二提示信息和第三提示信息中的至少一种信息,本发明实施例不对具体实现方式进行限定。
较佳地,第一处理模块171根据如下方式将自身所属的第一节点的时隙状态表划分成至少两个区段:
根据自身所属的第一节点的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出该第一节点当前维护的时隙状态表能够划分出的区段的个数;以及,在该第一节点的时隙状态表中,以设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个所述区段。
进一步,第一处理模块171具体用于:在自身所属的第一节点的时隙状态表,以设定的时隙为起始点向前或向后,按照设定的单个区段内能够包含的时隙信息的个数,依次划分出各个区段。
基于上述区段划分方式,设定的时隙包括但不限于以下时隙中的一种:
第一节点发送任一消息时所占用的时隙;
第一节点发送指定的数据包时所占用的时隙,如该第一节点发送指定业务的初始数据包时所占用的时隙;
第一节点发送第一FI所占用的时隙;
第一节点的时隙状态表中的第一个时隙。
其中,第一处理模块171在进行区段划分时,具体采用上述哪个设定的时隙作为起始点,可以由第一节点与其他节点预先约定,也可以由第一处理模块171确定后通知给其他节点,还可以由网络侧预先配置给各节点。
较佳地,第一处理模块171还用于:若自身所属的第一节点的时隙状态表的维护周期发生变化,且满足时隙状态表重置触发条件,重置该第一节点的时隙状态表中的时隙信息的内容,并更新该第一节点的时隙状态表的维护周期。
基于上述任一实施例,参见图18所示,本发明实施例提供的装置还包括:
接收模块173,用于在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
第二处理模块174,用于根据接收模块173接收到的第二FI,更新自身所属的第一节点当前维护的时隙占用状态,其中,该第二FI中携带用于表示时隙被占用的周期的指示信息。
在实施中,第二处理模块174具体用于:根据接收模块173接收到的第二FI,更新用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表。
进一步,第二处理模块174具体用于:若接收模块173接收到的第二FI中携带的时隙信息的个数大于自身所属的第一节点已建立的时隙状态表的时隙信息的个数,或者,根据接收模块173接收到的第二FI,确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围,则为自身所属的第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收模块173接收到的第二FI中携带的时隙信息,更新自身所属的第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,该至少一个扩展时隙状态表中包含的时隙信息的个数为第二处理模块174所属的第一节点已建立的时隙状态表中包含的时隙信息的个数的正整数倍。即:第二处理模块174创建的扩展时隙状态表所包含的时隙信息的个数可以与自身所属的第一节点已建立的时隙状态表中包含的时隙信息的个数相同,也可以大于该第一节点已建立的时隙状态表中包含的时隙信息的个数。
较佳地,该至少一个扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息。
较佳地,该至少一个扩展时隙状态表中的时隙信息的格式与第二处理模块174所属的第一节点已建立的时隙状态表中的时隙信息的格式相同。
在实施中,第二处理模块174根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围:
第二FI中携带的用于指示时隙被占用的周期的指示信息;
根据第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
自身所属的第一节点接收到第二FI的时隙的位置信息;
发送第二FI的节点的时隙状态表的维护周期;以及,
第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送第二FI的节点的时隙状态表包含的区段的第一提示信息。
举例说明,第二处理模块174可以根据第二FI中携带的指示信息以及接收模块173接收到第二FI的时隙的位置信息,确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围,具体的:第二处理模块174先确定接收模块173接收到第二FI的时隙的位置信息(即确定出接收到第二FI的时隙在自身所属的第一节点的时隙状态表中的位置);然后确定出该第二FI中时隙占用状态子域指示时隙已被占用的时隙信息对应的时隙位置;再针对该第二FI中时隙占用状态子域指示时隙已被占用的时隙信息,根据该时隙信息中用于指示时隙被占用的周期的指示信息,确定该时隙信息对应的时隙被占用的周期,并根据自身所属的第一节点的时隙状态表的维护周期以及确定出的该时隙信息对应的时隙被占用的周期,确定出该时隙信息是否超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围。如,确定出的该时隙信息对应的时隙最近一次被占用的时间点和下一次被占用时间点都超出自身所属的第一节点的时隙状态表的可维护时隙范围时,则该时隙信息超出该第一节点已建立的时隙状态表可维护的时隙信息的范围。
又如,第二处理模块174可以根据第二FI中携带的第二提示信息、第一提示信息、时隙占用状态指示信息、用于表示时隙被占用的周期的指示信息、以及接收到第二FI的时隙,确定第二FI中指示的被占用时隙最近一次被占用的时间点和下一次被占用的时间点都超出自身所属的第一节点的时隙状态表的可维护时隙范围时,则确定该时隙信息超出该第一节点已建立的时隙状态表可维护的时隙信息的范围。具体为:先根据第二提示信息和第一提示信息确定接收到的第二FI中携带的各时隙信息对应的时间点,然后根据第二FI中携带的各时隙信息中的时隙占用状态信息确定被占用时隙最近一次被占用的时间点,根据被占用时隙对应的指示信息确定该时隙下一次被占用的时间点,当发现任一时隙最近一次被占用的时间点和下一次被占用的时间点都超出自身所属的第一节点的时隙状态表可维护的时隙范围时,则确定该时隙对应的时隙信息超出该第一节点已建立的时隙状态表可维护的时隙信息的范围。
在实施中,第二处理模块174确定发送第二FI的节点的时隙状态表的维护周期,包括:根据接收模块173接收到的第二FI中携带的用于表示发送该第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收模块173接收到的第二FI中携带的第一提示信息、以及用于表示发送该第二FI 的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送该第二FI的节点的时隙状态表的维护周期。
在实施中,第二处理模块174具体用于:根据第二FI中所包含的未超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表;以及,根据第二FI中所包含的超出了该第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表对应的扩展时隙状态表。
进一步,第二处理模块174具体用于:
根据第二FI中携带的各时隙信息的内容,以接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,具体参见上述方式一,此处不再赘述;或者
根据第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,具体参见上述方式二,此处不再赘述。
基于上述任一实施例,第二处理模块174还用于:当已建立的时隙状态表满足时隙状态表重置触发条件时,重置该已建立的时隙状态表,并将该已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的该已建立的时隙状态表中包含的时隙信息中。
基于上述任一实施例,在实施中,时隙状态表重置触发条件包括但不限于以下条件中的一种:
该装置所属的第一节点在自身占用的时隙上完成数据包的发送后,触发自身的时隙状态表的重置;
该装置所属的第一节点占用的时隙与其他节点占用的时隙发生碰撞后,触发自身的时隙状态表的重置;
该装置所属的第一节点中用于存储数据包的缓冲区中没有数据包发送时,触发自身的时隙状态表的重置;以及,
该装置所属的第一节点的消息发送速率发生变化时,触发自身的时隙状态表的重置。
基于同一发明构思,本发明实施例还提供了一种时隙状态维护装置,应用于车载通信系统的任一节点设备(记为第一节点)中,参见图19所示,包括:
接收模块191,在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
第二处理模块192,用于根据所述接收模块接收到的第二FI,更新所述第一节点当前维护的时隙占用状态。
其中,接收模块191的处理过程与图18所示的接收模块173相同,第二处理模块192的处理过程与图18所示的第二处理模块174相同。具体请参见上述接收模块173和第二处理模块174的相关描述,此处不再赘述。
需要说明的是,本发明提供的时隙状态维护装置可以仅包括第一处理模块171和发送模块172;也可以仅包括接收模块173(或接收模块191)和第二处理模块174(或第二处理模块192);还可以既包括第一处理模块171和发送模块172,又包括接收模块173(或接收模块191)和第二处理模块174(或第二处理模块192)。
下面结合优选的硬件结构,对本发明实施例提供的节点设备(即第一节点)的结构、处理方式进行说明。如图20所示,该节点设备为车载通信系统中的任一节点设备(如车载设备),该节点设备包括至少一个处理器201、以及与该至少一个处理器201连接的发射机202,其中:
处理器201被配置用于生成第一FI,该第一FI中携带用于表示时隙被占用的周期的指示信息;
发射机202被配置用于在自身所属的第一节点占用的时隙上,将处理器201生成的第一FI发送给其他节点。
本发明实施例提供的节点设备为车载通信系统中的任一节点设备(如车载设备等),在不同节点占用时隙的周期不同的情况下,均能够将自己感知到的一跳节点、两跳节点的时隙占用信息准确的传递给周围节点,支持不同车辆密度场景中道路安全消息的发送。
本发明实施例中,第一FI中携带用于表示时隙被占用的周期的指示信息,和/或第二FI中携带用于表示时隙被占用的周期的指示信息的内容可以为时隙被占用的周期信息,也可以为占用时隙的节点在该时隙上发送业务的速率。
在实施中,处理器201被配置具体用于:根据用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表,生成第一FI。
进一步,处理器201还被配置用于:根据消息发送速率,确定自身所属的第一节点的时隙状态表的维护周期;其中,该消息发送速率包括自身所属的第一节点的消息发送速率、和/或其他节点的消息发送速率,具体参见方法部分的描述,此处不再赘述。
为了支持不同节点占用时隙的周期变化,较佳地,第一节点所维护的时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息,如增加“占用周期”子单元,用于指示各时隙被占用的周期。较佳地,时隙状态表中的每个时隙信息包含的指示信息的内容可以为时隙被占用的周期信息,也可以为占用时隙的节点在该时隙上发送业务的速率。
在实施中,处理器201被配置具体用于:在第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息,具体参见上述方式1,此处不再赘述;或者,在第一FI中增加用于表示发送该第一FI的时隙被占用的周期的指示信息,具体参见上述方式2,此处不再赘述;或者,在第一FI中增加用于表示各时隙被占用的周期的指示信息,具体参见上述方式3,此处不再赘述。
进一步,处理器201被配置具体用于:在第一FI中增加新的信息域,该新的信息域包含用于表示发送该第一FI的时隙被占用的周期的指示信息;或者,在第一FI中的发送该第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在第一FI中的发送该第一FI的时隙对应的时隙信息中的时隙占用状态子域、STI子域、或优先级子域中携带用于表示发送该第一FI的时隙被占用的周期的指示信息。
基于上述任一实施例,受到帧信息长度的限制,有可能出现用于表征第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于需要发送的第一FI所能携带的时隙信息的个数的最大值,在这种场景下,处理器201被配置具体用于:确定出用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于第一FI所能携带的时隙信息的个数的最大值;将该第一节点的时隙状态表划分成至少两个区段,每个区段内的时隙信息的个数不大于第一FI所能携带的时隙信息的个数的最大值;以及在该第一节点周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI。
为了使接收到第一FI的节点能够获知该第一FI所对应的区段,进一步,处理器201被配置具体用于:在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息;或者,在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示自身所属的第一节点的时隙状态表所划分的区段的数量的第二提示信息;或者,在第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示自身所属的第一节点的时隙状态表的维护周期的第三提示信息。
具体的,处理器201被配置可以采用如下方式在第一FI中携带第一提示信息、第二提示信息或第三提示信息:
1)在第一FI中增加新的信息域,该新的信息域包含第一提示信息、第二提示信息和第三提示信息中的至少一种信息。
2)在第一FI中的发送该第一FI的时隙对应的时隙信息中增加新的子域,以携带第一提示信息、第二提示信息和第三提示信息中的至少一种信息。
上述只是列举了两种优选的方式,当然,处理器201也可以采用其他方式在第一FI中携带第一提示信息、第二提示信息和第三提示信息中的至少一种信息,本发明实施例不 对具体实现方式进行限定。
较佳地,处理器201被配置根据如下方式将自身所属的第一节点的时隙状态表划分成至少两个区段:
根据自身所属的第一节点的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出该第一节点当前维护的时隙状态表能够划分出的区段的个数;以及,在该第一节点的时隙状态表中,以设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个区段。
进一步,处理器201被配置具体用于:在自身所属的第一节点的时隙状态表,以设定的时隙为起始点向前或向后,按照设定的单个区段内能够包含的时隙信息的个数,依次划分出各个区段。
基于上述区段划分方式,设定的时隙包括但不限于以下时隙中的一种:
第一节点发送任一消息时所占用的时隙;
第一节点发送指定的数据包时所占用的时隙,如该第一节点发送指定业务的初始数据包时所占用的时隙;
第一节点发送第一FI所占用的时隙;
第一节点的时隙状态表中的第一个时隙。
其中,处理器201在进行区段划分时,具体采用上述哪个设定的时隙作为起始点,可以由的第一节点与其他节点预先约定,也可以由处理器201确定后通知给其他节点,还可以由网络侧预先配置给各节点。
基于上述任一实施例,参见图21所示,本发明实施例提供的节点设备还包括:
与处理器201连接的接收机203,被配置用于:在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
处理器201还被配置用于:根据接收机203接收到的第二FI,更新用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表。
进一步,处理器201被配置具体用于:若自身所属的第一节点的时隙状态表的维护周期发生变化且满足时隙状态表重置触发条件,重置该第一节点的时隙状态表中的时隙信息的内容,并更新该第一节点的时隙状态表的维护周期。
在实施中,处理器201被配置具体用于:若接收机203接收到的第二FI中携带的时隙信息的个数大于自身所属的第一节点已建立的时隙状态表的时隙信息的个数,或者,根据接收机203接收到的第二FI确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围,则为自身所属的第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收机203接收到的第二FI中携带的时隙信 息,更新自身所属的第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
较佳地,该至少一个扩展时隙状态表中包含的时隙信息的个数为第一节点已建立的时隙状态表中包含的时隙信息的个数的正整数倍。也就是说,处理器201创建的扩展时隙状态表所包含的时隙信息的个数可以与自身所属的第一节点已建立的时隙状态表中包含的时隙信息的个数相同,也可以大于该第一节点已建立的时隙状态表中包含的时隙信息的个数。
较佳地,该至少一个扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息。
较佳地,该至少一个扩展时隙状态表中的时隙信息的格式与第一节点已建立的时隙状态表中的时隙信息的格式相同。
在实施中,处理器201被配置根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围:
第二FI中携带的用于指示时隙被占用的周期的指示信息;
根据第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
自身所属的第一节点接收到第二FI的时隙的位置信息;
发送第二FI的节点的时隙状态表的维护周期;以及,
第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送第二FI的节点的时隙状态表包含的区段的第一提示信息。
举例说明,处理器201可以根据第二FI中携带的指示信息以及接收机203接收到第二FI的时隙的位置信息,确定出需要更新的时隙信息的范围超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围,具体的:处理器201先确定接收机203接收到第二FI的时隙的位置信息(即确定出接收到第二FI的时隙在自身所属的第一节点的时隙状态表中的位置);然后确定出该第二FI中时隙占用状态子域指示时隙已被占用的时隙信息对应的时隙位置;再针对该第二FI中时隙占用状态子域指示时隙已被占用的时隙信息,根据该时隙信息中用于指示时隙被占用的周期的指示信息,确定该时隙信息对应的时隙被占用的周期,并根据自身所属的第一节点的时隙状态表的维护周期以及确定出的该时隙信息对应的时隙被占用的周期,确定出该时隙信息是否超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围。如,确定出的该时隙信息对应的时隙最近一次被占用的时间点和下一次被占用时间点都超出自身所属的第一节点的时隙状态表的可维护时隙范围时,则该时隙信息超出该第一节点已建立的时隙状态表可维护的时隙信息的范围。
又如,处理器201可以根据第二FI中携带的第二提示信息、第一提示信息、时隙占用状态指示信息、用于表示时隙被占用的周期的指示信息、以及接收到第二FI的时隙,确定 第二FI中指示的被占用时隙最近一次被占用的时间点和下一次被占用的时间点都超出自身所属的第一节点的时隙状态表的可维护时隙范围时,则确定该时隙信息超出该第一节点已建立的时隙状态表可维护的时隙信息的范围。具体为:先根据第二提示信息和第一提示信息确定接收到的第二FI中携带的各时隙信息对应的时间点,然后根据第二FI中携带的各时隙信息中的时隙占用状态信息确定被占用时隙最近一次被占用的时间点,根据被占用时隙对应的指示信息确定该时隙下一次被占用的时间点,当发现任一时隙最近一次被占用的时间点和下一次被占用的时间点都超出自身所属的第一节点的时隙状态表可维护的时隙范围时,则确定该时隙对应的时隙信息超出该第一节点已建立的时隙状态表可维护的时隙信息的范围。
在实施中,处理器201确定发送第二FI的节点的时隙状态表的维护周期,包括:根据接收机203接收到的第二FI中携带的用于表示发送该第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收机203接收到的第二FI中携带的第一提示信息、以及用于表示发送该第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送该第二FI的节点的时隙状态表的维护周期。
在实施中,处理器201被配置具体用于:根据第二FI中所包含的未超出自身所属的第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表;以及,根据第二FI中所包含的超出了该第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新已建立的时隙状态表对应的扩展时隙状态表。
进一步,处理器201被配置具体用于:
根据第二FI中携带的各时隙信息的内容,以接收机203接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,具体参见上述方式一,此处不再赘述;或者
根据第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收机203接收到该第二FI的时隙在自身所属的第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新该第一节点已建立的时隙状态表和/或该已建立的时隙状态表对应的扩展时隙状态表,具体参见上述方式二,此处不再赘述。
基于上述任一实施例,处理器201还被配置用于:当已建立的时隙状态表满足时隙状态表重置触发条件时,重置该已建立的时隙状态表,并将该已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的该已建立的时隙状态表中包含的时隙信息中。
基于上述任一实施例,在实施中,时隙状态表重置触发条件包括但不限于以下条件中的一种:
该装置所属的第一节点在自身占用的时隙上完成数据包的发送后,触发自身的时隙状态表的重置;
该装置所属的第一节点占用的时隙与其他节点占用的时隙发生碰撞后,触发自身的时隙状态表的重置;
该装置所属的第一节点中用于存储数据包的缓冲区中没有数据包发送时,触发自身的时隙状态表的重置;以及,
该装置所属的第一节点的消息发送速率发生变化时,触发自身的时隙状态表的重置。
基于同一发明构思,本发明实施例还提供了另一种节点设备(即第一节点),如图22所示,该节点设备为车载通信系统中的任一节点设备(如车载设备),该节点设备包括接收机221、以及与接收机221连接的至少一个处理器222,其中:
接收机221被配置用于:在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
处理器222还被配置用于:根据接收机221接收到的第二FI,更新用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表。
其中,接收机221与图21所示的接收机203的处理过程相同,处理器222与图21所示的处理器201的处理过程相同,具体参见图21所示的接收机203和处理器201的相关描述,此处不再赘述。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (52)

  1. 一种时隙状态维护方法,其特征在于,该方法包括:
    第一节点生成第一帧信息FI,其中,所述第一FI中携带用于表示时隙被占用的周期的指示信息;
    第一节点在自身占用的时隙上,将生成的第一FI发送给其他节点。
  2. 如权利要求1所述的方法,其特征在于,该方法还包括:
    所述第一节点在除自身占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
    所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态。
  3. 如权利要求1所述的方法,其特征在于,所述第一节点生成所述第一FI,包括:所述第一节点根据用于表征自身当前维护的时隙占用状态的时隙状态表,生成所述第一FI。
  4. 如权利要求3所述的方法,其特征在于,所述方法还包括:
    所述第一节点根据消息发送速率,确定自身的时隙状态表的维护周期;
    其中,所述消息发送速率包括所述第一节点的消息发送速率、和/或其他节点的消息发送速率。
  5. 如权利要求1~4任一项所述的方法,其特征在于,所述第一节点生成所述第一FI,包括:
    所述第一节点在所述第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,
    所述第一节点在所述第一FI中增加用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,
    所述第一节点在所述第一FI中增加用于表示各时隙被占用的周期的指示信息。
  6. 如权利要求5所述的方法,其特征在于,所述第一节点在所述第一FI中增加用于表示发送所述第一FI的时隙被占用的周期的指示信息,包括:
    所述第一节点在所述第一FI中增加新的信息域,所述新的信息域包含用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,
    所述第一节点在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,
    所述第一节点在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中的时隙占用状态子域、临时资源标识STI子域、或优先级子域中携带用于表示发送所述第一FI的时隙被占用的周期的指示信息。
  7. 如权利要求1~4任一项所述的方法,其特征在于,所述第一节点生成所述第一FI, 包括:
    所述第一节点确定出用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于所述第一FI所能携带的时隙信息的个数的最大值;
    所述第一节点将自身的时隙状态表划分成至少两个区段,每个区段内的时隙信息的个数不大于所述第一FI所能携带的时隙信息的个数的最大值;以及
    所述第一节点在自身周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI。
  8. 如权利要求7所述的方法,其特征在于,所述第一节点在自身周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI并发送给其他节点,包括:
    所述第一节点在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息;或者,
    所述第一节点在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表所划分的区段的数量的第二提示信息;或者,
    所述第一节点在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表的维护周期的第三提示信息。
  9. 如权利要求7所述的方法,其特征在于,所述第一节点将自身的时隙状态表划分成至少两个区段,包括:
    所述第一节点根据自身的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出自身的时隙状态表能够划分出的区段的个数;以及,
    所述第一节点在自身的时隙状态表中,以设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个所述区段。
  10. 如权利要求9所述的方法,其特征在于,所述设定的时隙为:
    所述第一节点发送任一消息时所占用的时隙;或者,
    所述第一节点发送指定的数据包时所占用的时隙;或者,
    所述第一节点发送所述第一FI所占用的时隙;或者,
    所述第一节点的时隙状态表中的第一个时隙。
  11. 如权利要求4所述的方法,其特征在于,所述方法还包括:
    若所述第一节点的时隙状态表的维护周期发生变化,且满足时隙状态表重置触发条件,所述第一节点重置自身的时隙状态表中的时隙信息的内容,并更新自身的时隙状态表的维护周期。
  12. 如权利要求2所述的方法,其特征在于,所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态,包括:
    所述第一节点根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于自身已建立的用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围;
    所述第一节点为自身已建立的时隙状态表,创建至少一个扩展时隙状态表;以及
    所述第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  13. 如权利要求12所述的方法,其特征在于,所述扩展时隙状态表满足下列条件中的至少一个条件:
    所述扩展时隙状态表中包含的时隙信息的个数为所述已建立的时隙状态表中包含的时隙信息的个数的正整数倍;
    所述扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息;
    所述扩展时隙状态表中的时隙信息的格式与所述已建立的时隙状态表中的时隙信息的格式相同。
  14. 如权利要求12所述的方法,其特征在于,所述第一节点根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围:
    所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
    所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
    所述第一节点接收到所述第二FI的时隙的位置信息;
    发送所述第二FI的节点的时隙状态表的维护周期;
    所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
  15. 如权利要求14所述的方法,其特征在于,所述第一节点确定发送所述第二FI的节点的时隙状态表的维护周期,包括:
    所述第一节点根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,
    所述第一节点根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第 二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期。
  16. 如权利要求12所述的方法,其特征在于,所述第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表,包括:
    所述第一节点根据所述第二FI中所包含的未超出自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,
    所述第一节点根据所述第二FI中所包含的超出了自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
  17. 如权利要求16所述的方法,其特征在于,所述第一节点更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表,包括:
    所述第一节点根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;或者,
    所述第一节点根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  18. 如权利要求12所述的方法,其特征在于,所述方法还包括:
    当所述已建立的时隙状态表满足时隙状态表重置触发条件时,所述第一节点重置所述已建立的时隙状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
  19. 如权利要求11或18所述的方法,其特征在于,所述时隙状态表重置触发条件,包括:
    所述第一节点在自身占用的时隙上完成数据包的发送后,触发自身的时隙状态表的重置;或者,
    所述第一节点占用的时隙与其他节点占用的时隙发生碰撞后,触发自身的时隙状态表的重置;或者,
    所述第一节点中用于存储数据包的缓冲区中没有数据包发送时,触发自身的时隙状态表的重置;或者,
    所述第一节点的消息发送速率发生变化时,触发自身的时隙状态表的重置。
  20. 一种时隙状态维护方法,其特征在于,该方法包括:
    第一节点在除自身占用的时隙之外的其他时隙上,接收其他节点发送的第二帧信息FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
    所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态。
  21. 如权利要求20所述的方法,其特征在于,所述第一节点根据所述第二FI,更新自身当前维护的时隙占用状态,包括:
    所述第一节点根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于自身已建立的用于表征自身当前维护的时隙占用状态的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围;
    所述第一节点为自身已建立的时隙状态表,创建至少一个扩展时隙状态表;以及
    所述第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  22. 如权利要求21所述的方法,其特征在于,所述扩展时隙状态表满足下列条件中的至少一个条件:
    所述扩展时隙状态表中包含的时隙信息的个数为所述已建立的时隙状态表中包含的时隙信息的个数的正整数倍;
    所述扩展时隙状态表中的每个时隙信息包含用于表示该时隙信息对应的时隙被占用的周期的指示信息;
    所述扩展时隙状态表中的时隙信息的格式与所述已建立的时隙状态表中的时隙信息的格式相同。
  23. 如权利要求21所述的方法,其特征在于,所述第一节点根据以下至少一种信息,确定出需要更新的时隙信息的范围超出自身已建立的时隙状态表可维护的时隙信息的范围:
    所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
    所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
    所述第一节点接收到所述第二FI的时隙的位置信息;
    发送所述第二FI的节点的时隙状态表的维护周期;
    所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
  24. 如权利要求22所述的方法,其特征在于,所述第一节点确定发送所述第二FI的 节点的时隙状态表的维护周期,包括:
    所述第一节点根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,
    所述第一节点根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期。
  25. 如权利要求21所述的方法,其特征在于,所述第一节点根据接收到的第二FI中携带的时隙信息,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表,包括:
    所述第一节点根据所述第二FI中所包含的未超出自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,
    所述第一节点根据所述第二FI中所包含的超出了自身已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
  26. 如权利要求25所述的方法,其特征在于,所述第一节点更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表,包括:
    所述第一节点根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;或者,
    所述第一节点根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新自身已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  27. 如权利要求21所述的方法,其特征在于,所述方法还包括:
    当所述已建立的时隙状态表满足时隙状态表重置触发条件时,所述第一节点重置所述已建立的时隙状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
  28. 一种时隙状态维护装置,其特征在于,该装置应用于第一节点中,该装置包括:
    第一处理模块,用于生成第一帧信息FI,其中,所述第一FI中携带用于表示时隙被占用的周期的指示信息;
    发送模块,用于在自身所属的第一节点占用的时隙上,将所述第一处理模块生成的第一FI发送给其他节点。
  29. 如权利要求28所述的装置,其特征在于,该装置还包括:
    接收模块,在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
    第二处理模块,用于根据所述接收模块接收到的第二FI,更新所述第一节点当前维护的时隙占用状态。
  30. 如权利要求28所述的装置,其特征在于,第一处理模块具体用于:
    根据用于表征所述第一节点当前维护的时隙占用状态的时隙状态表,生成所述第一FI。
  31. 如权利要求30所述的装置,其特征在于,第一处理模块还用于:
    根据消息发送速率,确定所述第一节点的时隙状态表的维护周期;其中,所述消息发送速率包括所述第一节点的消息发送速率、和/或其他节点的消息发送速率。
  32. 如权利要求28~31任一项所述的装置,其特征在于,第一处理模块具体用于:
    在所述第一FI中的每个时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在所述第一FI中增加用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,在所述第一FI中增加用于表示各时隙被占用的周期的指示信息。
  33. 如权利要求32所述的装置,其特征在于,第一处理模块具体用于:
    在所述第一FI中增加新的信息域,所述新的信息域包含用于表示发送所述第一FI的时隙被占用的周期的指示信息;或者,在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中增加用于表示该时隙被占用的周期的指示信息;或者,在所述第一FI中的发送所述第一FI的时隙对应的时隙信息中的时隙占用状态子域、STI子域、或优先级子域中携带用于表示发送所述第一FI的时隙被占用的周期的指示信息。
  34. 如权利要求28~31任一项所述的装置,其特征在于,第一处理模块具体用于:
    确定出用于表征所述第一节点当前维护的时隙占用状态的时隙状态表的时隙信息的个数大于所述第一FI所能携带的时隙信息的个数的最大值;将所述第一节点的时隙状态表划分成至少两个区段,每个区段内的时隙信息的个数不大于所述第一FI所能携带的时隙信息的个数的最大值;以及在所述第一节点周期性占用的时隙上,根据所述至少两个区段中的一个区段所包含的时隙信息,生成第一FI。
  35. 如权利要求34所述的装置,其特征在于,第一处理模块具体用于:
    在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息;或者,在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表所划分的区段的数量的第二 提示信息;或者,在所述第一FI中携带用于表示本次发送的第一FI中的时隙信息对应的区段的第一提示信息、以及用于表示所述第一节点的时隙状态表的维护周期的第三提示信息。
  36. 如权利要求34所述的装置,其特征在于,第一处理模块具体用于:
    根据所述第一节点的时隙状态表中的时隙信息的个数和设定的单个区段内能够包含的时隙信息的个数,确定出所述第一节点当前维护的时隙状态表能够划分出的区段的个数;以及,在所述第一节点的时隙状态表中,以设定的时隙为起始点,按照设定的单个区段内能够包含的时隙信息的个数,划分出各个所述区段。
  37. 如权利要求31所述的装置,其特征在于,第一处理模块还用于:
    若所述第一节点的时隙状态表的维护周期发生变化,且满足时隙状态表重置触发条件,重置所述第一节点的时隙状态表中的时隙信息的内容,并更新所述第一节点的时隙状态表的维护周期。
  38. 如权利要求29所述的装置,其特征在于,第二处理模块具体用于:
    根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于所述第一节点已建立的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围;为所述第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收到的第二FI中携带的时隙信息,更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  39. 如权利要求38所述的装置,其特征在于,第二处理模块根据以下至少一种信息,确定出需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围:
    所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
    所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
    所述第一节点接收到所述第二FI的时隙的位置信息;
    发送所述第二FI的节点的时隙状态表的维护周期;以及,
    所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
  40. 如权利要求39所述的装置,其特征在于,第二处理模块具体用于:
    根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的节点的时隙状态表的维 护周期。
  41. 如权利要求38所述的装置,其特征在于,第二处理模块具体用于:
    根据所述第二FI中所包含的未超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,根据所述第二FI中所包含的超出了所述第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
  42. 如权利要求41所述的装置,其特征在于,第二处理模块具体用于:
    根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;
    或者,
    根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  43. 如权利要求38所述的装置,其特征在于,第二处理模块还用于:
    当所述已建立的时隙状态表满足时隙状态表重置触发条件时,重置所述已建立的时隙状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
  44. 一种时隙状态维护装置,其特征在于,该装置应用于第一节点中,该装置包括:
    接收模块,在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二帧信息FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
    第二处理模块,用于根据所述接收模块接收到的第二FI,更新所述第一节点当前维护的时隙占用状态。
  45. 如权利要求44所述的装置,其特征在于,第二处理模块具体用于:
    根据接收到的第二FI,确定出所述第二FI中携带的时隙信息的个数大于所述第一节点已建立的时隙状态表的时隙信息的个数,或者,需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围;为所述第一节点已建立的时隙状态表,创建至少一个扩展时隙状态表;以及根据接收到的第二FI中携带的时隙信息,更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  46. 如权利要求45所述的装置,其特征在于,第二处理模块根据以下至少一种信息, 确定出需要更新的时隙信息的范围超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围:
    所述第二FI中携带的用于指示时隙被占用的周期的指示信息;
    所述第一节点根据所述第二FI包含的时隙信息,确定出的各节点所占用的时隙的位置信息;
    所述第一节点接收到所述第二FI的时隙的位置信息;
    发送所述第二FI的节点的时隙状态表的维护周期;以及,
    所述第二FI中携带的用于表示本次发送的第二FI中的时隙信息对应于发送所述第二FI的节点的时隙状态表包含的区段的第一提示信息。
  47. 如权利要求46所述的装置,其特征在于,第二处理模块具体用于:
    根据接收到的第二FI中携带的用于表示发送所述第二FI的节点的时隙状态表的维护周期的第三提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期;或者,根据接收到的第二FI中携带的第一提示信息、以及用于表示发送所述第二FI的节点的时隙状态表所划分的区段的数量的第二提示信息,确定发送所述第二FI的节点的时隙状态表的维护周期。
  48. 如权利要求45所述的装置,其特征在于,第二处理模块具体用于:
    根据所述第二FI中所包含的未超出所述第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表;以及,根据所述第二FI中所包含的超出了所述第一节点已建立的时隙状态表可维护的时隙信息的范围的时隙信息的内容,更新所述已建立的时隙状态表对应的扩展时隙状态表。
  49. 如权利要求48所述的装置,其特征在于,第二处理模块具体用于:
    根据所述第二FI中携带的各时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,依次更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表;
    或者,
    根据所述第二FI中携带的各时隙信息的内容,确定出所包含的时隙占用状态子域指示时隙已被占用的时隙信息,并根据确定出的时隙信息的内容,以接收到所述第二FI的时隙在所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表中对应的位置为起始点向前或向后,更新所述第一节点已建立的时隙状态表和/或所述已建立的时隙状态表对应的扩展时隙状态表。
  50. 如权利要求44所述的装置,其特征在于,第二处理模块还用于:
    当所述已建立的时隙状态表满足时隙状态表重置触发条件时,重置所述已建立的时隙 状态表,并将所述已建立的时隙状态表对应的扩展时隙状态表中包含的时隙信息的内容更新至重置后的所述已建立的时隙状态表中包含的时隙信息中。
  51. 一种节点设备,其特征在于,包括至少一个处理器以及与所述至少一个处理器连接的发射机,其中:
    所述处理器被配置用于生成第一FI,所述第一FI中携带用于表示时隙被占用的周期的指示信息;
    所述发射机被配置用于在自身所属的第一节点占用的时隙上,将所述处理器生成的第一FI发送给其他节点。
  52. 一种节点设备,其特征在于,包括接收机、以及与所述接收机连接的至少一个处理器,其中:
    所述接收机被配置用于:在除自身所属的第一节点占用的时隙之外的其他时隙上,接收其他节点发送的第二帧信息FI,其中,所述第二FI中携带用于表示时隙被占用的周期的指示信息;
    所述处理器被配置用于:根据所述接收机接收到的第二FI,更新用于表征自身所属的第一节点当前维护的时隙占用状态的时隙状态表。
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CN106487470B (zh) * 2015-08-31 2019-03-05 大唐电信科技产业控股有限公司 一种传输时隙信息的方法和通信节点
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103248463A (zh) * 2012-02-06 2013-08-14 电信科学技术研究院 一种传输帧信息的方法及设备
CN103687045A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种业务发送方法及装置
CN103687031A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种时隙状态维护方法及装置
CN103686800A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种多时隙资源的单表处理方法及装置
CN103684645A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种时隙碰撞的处理方法及装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5812547A (en) * 1996-08-22 1998-09-22 At&T Corp. System and method for dynamic time division access

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103248463A (zh) * 2012-02-06 2013-08-14 电信科学技术研究院 一种传输帧信息的方法及设备
CN103687045A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种业务发送方法及装置
CN103687031A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种时隙状态维护方法及装置
CN103686800A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种多时隙资源的单表处理方法及装置
CN103684645A (zh) * 2012-09-07 2014-03-26 电信科学技术研究院 一种时隙碰撞的处理方法及装置

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