WO2016041420A1 - 一种时隙选择的方法及装置 - Google Patents

一种时隙选择的方法及装置 Download PDF

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Publication number
WO2016041420A1
WO2016041420A1 PCT/CN2015/086281 CN2015086281W WO2016041420A1 WO 2016041420 A1 WO2016041420 A1 WO 2016041420A1 CN 2015086281 W CN2015086281 W CN 2015086281W WO 2016041420 A1 WO2016041420 A1 WO 2016041420A1
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time slot
slot
node
information
sent
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PCT/CN2015/086281
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English (en)
French (fr)
Inventor
郭宣羽
周海军
冯媛
房家奕
唐纪晔
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电信科学技术研究院
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Publication of WO2016041420A1 publication Critical patent/WO2016041420A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation

Definitions

  • the present application relates to the field of communications, and in particular, to a method and apparatus for time slot selection.
  • the RR-ALOHA protocol is a channel access protocol based on time slot structure of TDMA (Time Division Multiple Access), which not only has higher reliability and real-time performance, but also supports single-hop range in multi-vehicle cooperative communication.
  • the broadcast function is internal, and the protocol can be designed independently of the physical layer. Therefore, the RR-ALOHA protocol based on the reserved slot can be adopted in the upper layer MAC (Media Access Control) of the communication system.
  • the reliable reservation ALOHA algorithm is a TDMA-based access and resource allocation mechanism.
  • the resource allocation is based on the frame structure in slots.
  • each node In the RR-ALOHA mechanism, each node must obtain a BC (Basic Channels). When a node obtains a BC channel, it periodically transmits FI (Frame Information) on the time slot corresponding to the BC channel, and each N slots constitute one frame (recorded as Frame), and the slot in each frame The numbers are 0 to N-1, and are repeated between frames. Only one node is allowed to transmit in each slot, that is, TDMA mode between nodes. When a node occupies a time slot, the frame information (Frame Information, FI) of the fixed information organization structure is periodically transmitted.
  • FI Frame Information
  • the FI carries the time slot occupied state directly perceived by the local node, that is, the OH (One hop) of the local node.
  • Each node listens to the FI sent by its surrounding nodes to obtain the slot occupancy status (that is, the slot allocation status) of each node within two hops of the node, and according to the FI of the neighboring node and its own channel usage.
  • the time slot occupation status is updated, and the updated time slot occupation status is reflected in the FI information sent by itself, thereby realizing the reuse of time slot resources between the one-hop clusters whose coverage areas are not intersected.
  • the occupied time slot may be used to transmit data, during which other nodes cannot use the time slot.
  • other idle channels may be occupied for transmission by scheduling an additional channel.
  • nodes It is also possible to transmit by scheduling a P2P (Peer-to-Peer) channel to implement time slot multiplexing in adjacent one-hop clusters, thereby improving channel utilization.
  • P2P Peer-to-Peer
  • the RR-ALOHA mechanism can only select a limited terminal for relaying to avoid network congestion caused by flooding routes.
  • FI is a vector consisting of N slot state information, also known as FI information, where N is the number of slots included in a frame.
  • the method includes: a slot occupancy state sub-domain, an STI (Source Temporary Identifier) sub-domain, a priority sub-domain, and a PTP (point-to-point service) flag sub-domain.
  • STI Source Temporary Identifier
  • PTP point-to-point service
  • the time slot occupation status sub-domain carries the time slot status information of the arbitrary one time slot, indicating whether the arbitrary one time slot is occupied.
  • the STI subdomain carries the STI of the node occupying the any one slot.
  • the priority sub-domain carries the priority status corresponding to the data transmitted by the node occupying the arbitrary one time slot in the arbitrary one time slot.
  • the point-to-point service indicator sub-domain carries the node service flag of the any one time slot
  • the size of the slot state information is 1 bit (bit), and the size of the STI is 8 bits.
  • the size of the priority state corresponding to the data transmitted by the node occupying the slot in the time slot is 2 bits, and the size of the PTP flag is 1 bit.
  • the node In each frame, the node must send the FI through the sending time slot of the node (that is, the occupied time slot of the local node), and according to the acquired FI of the neighboring node and the channel usage of the local node (ie, the time slot of the local node) Occupancy status) Instantly update the local time slot occupation status vector (table), and display the updated time slot occupancy status in the FI sent by the local node.
  • All nodes in each OH cluster have full connectivity within the cluster (ie, any node within each OH cluster can know the slot occupancy status of all nodes within the OH cluster). Nodes belonging to different clusters will not be able to communicate directly if they do not belong to a common subset of all clusters (ie, nodes within each OH cluster, if the node does not belong to a common subset with another cluster, then the other cluster cannot be known.
  • the time slot occupancy status of the node In the RR-ALOHA algorithm, when a new node joins the network, it must acquire a time slot, that is, it needs to perform a channel occupation process, occupying one time slot. After the new node successfully occupies one time slot, the time slot is also needed. Perform the channel maintenance process.
  • the channel occupation process performed by the node is exemplified below with reference to FIG. 1 and FIG. 2.
  • Step 101 The node first monitors the channel occupancy of one frame before selecting the slot resource.
  • the node listens to all slots in the frame within one frame after starting the access procedure.
  • the node When a node listens to a slot in the frame, the node receives the FI sent by other nodes in the OH cluster. If the FI sent by any other node in the OH cluster indicates that the slot occupancy status of the corresponding slot X is busy, the node marks the slot X in the local slot state vector (table) as RESERVED (occupied), otherwise Mark as AVAILABLE (available).
  • the node separately parses all the FI information received in the frame, and determines the slot occupancy status of each slot according to the above manner.
  • Step 102 The node selects one free slot (ie, available slot) from the time slots in the monitored frame.
  • the slot When a slot is recorded in the slot-local state vector (table) of the node as the slot occupancy state is AVAILABLE, the slot is considered to be an idle slot (ie, an idle slot).
  • step 103 is performed; if no idle slot is available for access, the process returns to step 101 to continue monitoring the next frame.
  • Step 103 The node determines whether the idle slot selected in step 102 is reached.
  • the slots are continuously monitored before the slot p arrives.
  • the basic RR-RLOHA algorithm does not specify whether the slot p is still idle before the slot p arrives.
  • Judge. Go to slot p and go to step 104.
  • Step 104 The node sends the FI in slot p.
  • the occupied slot occupancy state is BUSY (fill in 1 in the corresponding slot occupancy status subfield), and fill in the STI of the node in the STI subfield.
  • BUSY fill in 1 in the corresponding slot occupancy status subfield
  • the STI fill in the node in the STI subfield.
  • the slot occupancy status of the slot is marked as BUSY (corresponding to Fill in the slot occupation status subfield of the slot, 1), and fill in the STI of the corresponding node in the STI subfield of the slot, and fill in the priority information of the node to send data in the priority subdomain of the slot, in the point-to-point service.
  • the flag subfield fills in the PTP flag;
  • the slot is marked as FREE (can be correspondingly Fill in the slot occupancy status subfield of the slot and fill in 0).
  • the node After the node fills in each field in the FI according to the above rules, the node transmits the FI in the time slot p.
  • Step 105 Monitor the feedback and confirm whether the current time slot occupied by the current application is successful.
  • the transmitting time slot of the local node is occupied by the local node in all the received FIs (that is, in all the FIs received, the time slot occupation status of the sending time slot of the local node is If the flag is busy and the corresponding STI is the same as the local node, the FI is successfully sent. Otherwise, the FI transmission fails. In practical applications, This process can be achieved through logic and operations.
  • the node listens to a frame from slot p+1. If all the fed FIs in the frame indicate that slot p is occupied by the node, the node continues to send FI information in slot p in the next frame; if in slot In the FI of all feedbacks received in one frame starting from p+1, there is at least one FI indicating that the slot occupancy status of slot p is FREE, or / and there is at least one FI indicating the slot occupancy status of slot p is BUSY If the STI of the slot p is different from the local node, it is considered that the node fails to send the FI in the slot p, that is, the slot that the node requests to occupy the slot p fails, and the process returns to step 102.
  • the process of performing channel maintenance (that is, maintaining the time slots occupied by the node) by the node is as follows:
  • the node In the basic RR-ALOHA, the node periodically sends the FI in the time slot occupied by the node, and the time slot occupancy of the channel is maintained through the FI interaction between the nodes. If the node does not actively give up the time slot occupied by the node, the node can always use the time slot occupied by the node for data transmission. However, if the network structure changes, the node needs to continuously detect whether the time slot occupied by the node collides with the time slot occupied by other nodes according to the feedback FI received in the receiving time slot. If a time slot occupied by multiple nodes collides, all the nodes occupying the time slot need to release the time slot, and re-initiate the access process to reserve the channel.
  • Listening window The purpose is to understand the complete channel state information. After this window is finished, the time slot resource can be selected.
  • the listening window is 1 frame long.
  • the monitoring starts.
  • the node accesses the maintenance channel to determine whether the channel is successful.
  • the node determines the information received on all receiving time slots (ie, in the feedback window).
  • the node considers that the time slot application is successful, and the node starts to occupy this time slot. If the transmission slot is included, the feedback window length is 1 frame. If the transmission slot is not included, the feedback window length is (N-1) slots, and N is the total number of slots in a frame.
  • the node needs to update the slot status vector (table) every time the FI is received in the receiving slot.
  • the idle slot selected in step 102 is slot p
  • the FI received by the node indicates that slot p is occupied by the node, that is, the slot state information corresponding to slot p in the received FI is BUSY (slot). If the occupancy status is 1) and the STI in the STI sub-domain is the same as the STI of the local node, it is determined that the local node receives positive feedback.
  • the node If at least one FI in the FI received by the node indicates that the slot p is idle or/and indicates that the slot p is occupied by other nodes, that is, the slot status information received by the node in at least one FI is FREE (the slot occupied state subfield is 0), or / and, the node receives the slot occupancy state in at least one FI is BUSY, and the STI in the STI subfield is different from the STI of the local node, then it is determined that the node receives negative feedback.
  • FREE the slot occupied state subfield is 0
  • the time slot occupied state is FREE
  • any time slot occupied by any non-node two or more frame information appears indicating that the time slot is occupied by two or more nodes (ie, different STIs), and it is determined that the time slot collides.
  • the node If the node detects a collision in a certain time slot, it sends a FI containing feedback information to the node occupying the time slot in the sending time slot of the local node, indicating that the time slot collides, and performing negative feedback on the node occupying the time slot. If the node detects that there is no collision in a certain time slot, it will send the FI containing the feedback information to the node occupying the time slot in the sending time slot of the local node, indicating that the time slot has not collided, and the node occupying the time slot Make positive feedback.
  • each frame contains 6 slots
  • the node starts the access process from slot 2, and continues to monitor within one frame thereafter, and selects slot 4 as the local node according to the intra-frame listening result after starting the access.
  • Send the time slot then continue to listen to 2 slots, and start transmitting the FI of the node when it reaches slot 4, in the N-1 fields after sending the FI of the node (that is, in slot 5, slot 0, slot) 2 and slot 3) obtaining feedback information of other stations for the time slots maintained by the node, and determining whether the feedback information of the time slots maintained by the node in the slots 5, slot 0, slot 2, and slot 3 for the current node is Positive feedback: if yes, in the subsequent frames, the feedback information of other stations for the time slots maintained by the node is continuously obtained, and it is determined whether it is positive feedback. Otherwise, the operation of selecting the idle slot as the transmission slot of the local node is returned. .
  • the FI information exchanged between the nodes is MAC layer information, only for slot status information, priority information, STI information, and PTP. Information is interacted. There is also the possibility of collision for time slots that are not occupied. It is only possible to determine whether the time slot selection is correct and whether there is a time slot collision by receiving feedback. It can be seen that the basic RR-ALOUHA algorithm is not conducive to reducing the possibility of selecting slot collisions, and the slot selection efficiency is low, which is not conducive to reducing the information overhead of interaction.
  • the embodiment of the present application provides a method and a device for selecting a time slot, so as to reduce the possibility of collision of time slot selection.
  • a method for selecting a time slot comprising:
  • the first node listens to the FI sent by the other node, and after listening to the 1 frame, the UE selects its own transmission time slot according to the result of the monitoring of the FI, and each FI carries the N time slots reported by the corresponding node.
  • Slot status Information each time slot status information includes occupation status information or measurement information of the time slot, where N is the number of time slots included in one frame;
  • the first node continues to listen to the FI sent by other nodes in the non-self-sending time slot, and updates the time slot status information of each time slot of the local record according to the monitoring result and the self-measurement result;
  • the first node generates FI according to the latest updated slot status information of each slot, and transmits when the next transmission slot is reached.
  • the first node can determine the time slots that have the highest probability of being occupied and collided according to the information obtained by the underlying measurement interacting with other nodes, thereby avoiding the time slots when selecting the transmission time slot, thereby reducing the transmission time slot.
  • the possibility of collision increases the accuracy of selection of transmission slots and the efficiency of selection. At the same time, it helps to reduce the resource overhead of information interaction and reduce the operating load of the system.
  • the first node listens to the FI sent by other nodes, and after listening to one frame, according to the result of monitoring the FI, combined with the self measurement information, selects its own transmission time slot:
  • Time slot Selecting a time slot to be selected according to the FI sent by the other node, where at least one time slot is selected as the candidate when there is no occupied state information in the slot state information recorded for the at least one time slot in the FI sent by the other node.
  • a candidate transmission slot is selected as the transmission slot.
  • selecting a candidate transmission time slot as the transmission time slot includes:
  • one candidate transmission slot is directly selected as the final transmission slot
  • one candidate transmission slot is randomly selected as the final transmission slot, or the maximum received total power of each candidate transmission slot is determined, and the maximum received total power is selected.
  • the candidate transmission time slot with the smallest value is taken as the final transmission time slot, wherein the maximum total received power of one candidate transmission time slot refers to the total received power in the FI reported by other nodes for one candidate transmission time slot record. The maximum received total power.
  • the first node continues to listen to the FI sent by other nodes in the non-self-sending time slot, and updates the time slot status information of each time slot in the local record according to the monitoring result and the self-measurement result, including:
  • the first node receives an FI sent by another node in a time slot, and updates the FI sent by another node received last according to the received FI, and the FI carries a time slot of N slots reported by other nodes. status information.
  • the first node continues to listen to the FI sent by other nodes in the non-self-sending time slot, and updates the time slot status information of each time slot in the local record according to the monitoring result and the self-measurement result, including:
  • the first node continues to listen to the FI sent by other nodes in the non-self-transmitting time slot, and updates the slot state information of each time slot of the local record according to the latest received FI, and determines the corresponding sending time slot corresponding to the first node. Whether the occupancy status information is not recorded and the recorded measurement information is less than the preset threshold, and if so, the selected transmission time slot is maintained, otherwise, the transmission time slot is reselected.
  • the first node determines, according to the latest slot state information of each time slot, whether the corresponding transmission time slot is not recorded in the transmission time slot selected by the first node, and the recorded measurement information is less than a preset threshold, including :
  • the first node After the first node selects the transmission time slot, before the next time the transmission time slot is reached, according to all FI unified judgments sent by other newly received nodes, whether the corresponding transmission time slot has not recorded the occupation status information and the recorded measurement information is smaller than the pre-predetermined Set a threshold;
  • the first node After the first node selects the transmission time slot, before receiving the transmission time slot for the next time, each time an FI sent by another node is received, it is determined whether the corresponding transmission time slot has not recorded the occupation status information and the recorded measurement information is less than the pre- Set a threshold.
  • the first node determines the time slots that are most likely to be occupied and collided according to the information obtained through the underlying measurement interaction with other nodes, thereby avoiding these time slots when selecting the transmission time slot, thereby reducing the occurrence of the transmission time slot.
  • the possibility of a collision is the possibility of a collision.
  • the first node updates the time slot status information of each time slot of the local record according to the monitoring result and the self measurement result, including:
  • the FI of the other node is correctly demodulated, and the time slot status information of each time slot carried in the FI includes occupation status information or measurement information, where the occupied status information is occupied by the corresponding time slot.
  • the node of the node temporarily identifies the STI, and updates the slot state information of each slot according to the obtained FI;
  • the FI of the other node is correctly demodulated, and the time slot status information of each time slot carried in the FI includes occupation status information or measurement information, where the occupied status information is interference of the corresponding time slot.
  • the status information is updated according to the obtained FI time slot status information of each time slot, and the interference state information reported by the occupied node in determining a time slot indicates that the signal interference of a time slot does not reach the set threshold and is in a time slot itself.
  • the interference state information of one time slot is adjusted;
  • the time slot information corresponding to one time slot is recorded as the measurement information measured by itself in one time slot.
  • the first node generates the FI according to the latest updated slot state information of each time slot, including:
  • the first node fills its own identification information as the occupancy status information into the information field corresponding to the transmission slot selected by the FI itself;
  • the first node fills the occupation status information into the information field corresponding to a time slot in the FI;
  • the first node will fill in the occupancy status information or measurement information that is monitored by the first time slot to the time slot corresponding to the time slot in the FI. Within the information domain.
  • the first node will fill in the measurement information that is monitored by the first time slot to the information field corresponding to a time slot in the FI when the first node arrives.
  • the first node determines whether the occupancy status information recorded for the one time slot in the FI sent by the other node is the same, including:
  • the first node determines whether the occupied node information recorded for one time slot in the FI sent by the other node is the STI of the same node, and if so, the same, otherwise, is not the same;
  • the first node determines whether the interference status information recorded for the one time slot in the FI sent by the other node indicates that the interference does not reach the threshold, and if so, the same, otherwise, is not the same;
  • the first node determines whether the interference status information recorded for the one time slot in the FI sent by the other node indicates that the interference reaches the threshold and the occupied node information is the same, and if so, the same, otherwise, not the same.
  • the first node generates the FI according to the latest updated slot status information of each time slot, including:
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X1 bit recording channel indication is used for each time slot in a frame, and the occupied node STI or measurement information is recorded by using Y1 bits.
  • X1 and Y1 are preset parameters
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X2 bit recording channel indication is used for each time slot in a frame, and the interference indication is recorded by Y2 bit, or
  • the X2 bit records the channel indication, uses the Y2 bit to record the interference indication, uses the Z bit to record the occupied node STI, or uses the X2 bit to record the channel indication, and uses the W bit to record the measurement information, where X2, Y2, Z, and W are preset parameters.
  • the method further comprises:
  • the first node After the first node sends the FI, it continues to receive the FI sent by other nodes;
  • the first node determines, in the FI sent by the other node, the slot status message recorded for the sending slot selected by the first node. Whether the valid occupancy status information contained in the information is the same, and if so, confirms that the access is successful, otherwise, the transmission time slot is reselected.
  • a device for selecting a time slot comprising:
  • the selection unit is configured to listen to the FI sent by other nodes, and after listening to the 1 frame, the result of the monitoring of the FI is combined with the measurement information of the self, and the transmission time slot is selected, wherein each FI carries the N times reported by the corresponding node.
  • the slot state information of the slot each slot state information includes occupied state information or measurement information of the slot, where N is the number of slots included in one frame;
  • An update unit configured to continue to listen to the FI sent by other nodes, and perform real-time update on the time slot status information of each time slot of the local record according to the monitoring result and the self measurement result;
  • a processing unit configured to generate FI according to the latest updated slot state information of each time slot, and send when the next sending time slot is reached.
  • the first node can determine the time slots that have the highest probability of being occupied and collided according to the information obtained by the underlying measurement interacting with other nodes, thereby avoiding the time slots when selecting the transmission time slot, thereby reducing the transmission time slot.
  • the possibility of collision increases the accuracy of selection of transmission slots and the efficiency of selection. At the same time, it helps to reduce the resource overhead of information interaction and reduce the operating load of the system.
  • the FI that is sent by other nodes is monitored, and after listening to one frame, the UE selects its own transmission time slot according to the result of monitoring the FI, and the selection unit is specifically used for:
  • Time slot Selecting a time slot to be selected according to the FI sent by the other node, where at least one time slot is selected as the candidate when there is no occupied state information in the slot state information recorded for the at least one time slot in the FI sent by the other node.
  • a candidate transmission slot is selected as the transmission slot.
  • the selecting unit is specifically configured to:
  • one candidate transmission slot is directly selected as the final transmission slot
  • one candidate transmission slot is randomly selected as the final transmission slot, or the maximum received total power of each candidate transmission slot is determined, and the maximum received total power is selected.
  • the candidate transmission time slot with the smallest value is taken as the final transmission time slot, wherein the maximum total received power of one candidate transmission time slot refers to the total received power in the FI reported by other nodes for one candidate transmission time slot record. The maximum received total power.
  • the FI sent by other nodes is continuously monitored, and the local record is recorded according to the monitoring result and the self measurement result.
  • the update unit is specifically used to:
  • the FI sent by another node is received in one slot, and the FI sent by another node received last time is updated according to the received FI.
  • the FI carries the slot status information of the N slots reported by other nodes.
  • the update unit is specifically configured to:
  • the update unit is specifically determined according to the newly saved time slot state information of each time slot, whether the corresponding transmission time slot of the first node is not recorded with the occupied state information, and the recorded measurement information is less than a preset threshold. Used for:
  • the device determines the time slots that have the highest probability of being occupied and collided according to the information obtained by the underlying measurement interaction with other nodes, thereby avoiding the time slots when selecting the transmission time slot, thereby reducing the collision of the transmission time slots. The possibility.
  • the updating unit is specifically configured to:
  • the slot state information of each time slot carried in the FI includes occupation status information or measurement information, where the occupied status information is the node of the occupied node of the corresponding time slot.
  • the slot state information of each time slot carried in the FI includes the occupied state information or the measurement information, where the occupied state information is the interference state information of the corresponding time slot. Then, the slot state information of each time slot is updated according to the obtained FI, and the interference state information reported by the occupied node that determines the time slot indicates that the signal interference of one time slot does not reach the set threshold and the signal measured by itself in one time slot When the interference reaches the set threshold, the interference state information of one time slot is adjusted;
  • each slot state information corresponding to one slot is recorded as measurement information measured by itself in one slot.
  • the processing unit is specifically configured to:
  • the sending unit fills the occupation status information into the information field corresponding to a time slot in the FI;
  • the sending unit fills in the information corresponding to the time slot of the one slot in the FI when the time slot arrives. Within the domain.
  • the sending unit will fill in the measurement information that is monitored by the time slot for the time slot.
  • the processing unit is specifically configured to:
  • the sending unit determines whether the occupied node information recorded for one time slot in the FI sent by the other node is the STI of the same node, and if yes, the same, otherwise, is not the same;
  • the sending unit determines whether the interference state information recorded for the one time slot in the FI sent by the other node indicates that the interference does not reach the threshold, and if so, the same, otherwise, is not the same;
  • the sending unit determines whether the interference status information recorded for the one time slot in the FI sent by the other node indicates that the interference reaches the threshold and the occupied node information is the same, and if so, the same, otherwise, not the same.
  • the processing unit is specifically configured to:
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X1 bit recording channel indication is used for each time slot in a frame, and the occupied node STI or measurement information is recorded by using Y1 bits.
  • X1 and Y1 are preset parameters
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X2 bit recording channel indication is used for each time slot in a frame, and the interference indication is recorded by Y2 bit, or
  • the X2 bit records the channel indication, uses the Y2 bit to record the interference indication, uses the Z bit to record the occupied node STI, or uses the X2 bit to record the channel indication, and uses the W bit to record the measurement information, where X2, Y2, Z, and W are preset parameters. number.
  • the sending unit is specifically configured to:
  • a device for selecting a time slot comprising:
  • a processor for reading a program in the memory performing the following process:
  • each FI carries the N time slots reported by the corresponding node.
  • the time slot status information each time slot status information includes occupation status information or measurement information of the time slot, where N is the number of time slots included in one frame, and continues to listen to the FI sent by other nodes through the transceiver, and according to the monitoring result and
  • the self-measurement result updates the slot state information of each time slot recorded locally, and generates FI according to the latest updated slot state information of each slot, and transmits when the next transmission slot is reached;
  • a transceiver for receiving and transmitting data under the control of a processor.
  • the device can determine the time slots that have the highest probability of being occupied and collided according to the information obtained through the underlying measurement interaction with other nodes, thereby avoiding the time slots when selecting the transmission time slot, thereby reducing the occurrence of the transmission time slot.
  • the possibility of collision improves the accuracy of selection of transmission slots and the efficiency of selection. At the same time, it helps to reduce the resource overhead of information interaction and reduce the operating load of the system.
  • the transceiver is used to monitor the FI sent by other nodes, and after listening to one frame and combining the measurement information according to the result of monitoring the FI, and selecting its own transmission time slot, the processor is specifically configured to:
  • Time slot Selecting a time slot to be selected according to the FI sent by the other node, where at least one time slot is selected as the candidate when there is no occupied state information in the slot state information recorded for the at least one time slot in the FI sent by the other node.
  • a candidate transmission slot is selected as the transmission slot.
  • the processor is specifically configured to:
  • one candidate transmission slot is directly selected as the final transmission slot
  • one candidate transmission slot is randomly selected as the final transmission slot, or the maximum received total power of each candidate transmission slot is determined, and the maximum received total power is selected.
  • the candidate transmission slot with the smallest value is used as the final transmission slot, where the maximum received total power of one candidate transmission slot refers to The total received total power of each of the total received powers recorded for the candidate transmission slot in the FI reported by the other node.
  • the processor determines the time slots that have the highest probability of being occupied and collided according to the information obtained by the underlying measurement interacting with other nodes, thereby avoiding these time slots when selecting the transmission time slot, thereby reducing the collision of the transmission time slots.
  • the transceiver continues to listen to the FI sent by other nodes, and performs real-time update on the slot status information of each time slot recorded locally according to the monitoring result and the self-measurement result
  • the processor is specifically configured to:
  • the FI sent by another node is received in one slot, and the FI sent by another node received last time is updated according to the received FI.
  • the FI carries the slot status information of the N slots reported by other nodes.
  • the transceiver continues to listen to the FI sent by other nodes, and performs real-time update on the slot status information of each time slot recorded locally according to the monitoring result and the self-measurement result
  • the processor is specifically configured to:
  • the processor is specifically configured to:
  • the slot state information of each time slot carried in the FI includes occupation status information or measurement information, where the occupied status information is the node of the occupied node of the corresponding time slot.
  • the slot state information of each time slot carried in the FI includes the occupied state information or the measurement information, where the occupied state information is the interference state information of the corresponding time slot. Then, the slot state information of each time slot is updated according to the obtained FI, and the interference state information reported by the occupied node that determines the time slot indicates that the signal interference of one time slot does not reach the set threshold and the signal measured by itself in one time slot Interference When the set threshold is reached, the interference state information of one time slot is adjusted;
  • each slot state information corresponding to one slot is recorded as measurement information measured by itself in one slot.
  • the processor is specifically configured to:
  • the sending unit fills the occupation status information into the information field corresponding to a time slot in the FI;
  • the sending unit fills in the information corresponding to the time slot of the one slot in the FI when the time slot arrives. Within the domain.
  • the sending unit will fill in the measurement information that is monitored by the time slot for the time slot.
  • the processor when determining whether the occupation status information recorded for one time slot in the FI sent by the other node is the same, the processor is specifically configured to:
  • the sending unit determines whether the occupied node information recorded for one time slot in the FI sent by the other node is the STI of the same node, and if yes, the same, otherwise, is not the same;
  • the sending unit determines whether the interference state information recorded for the one time slot in the FI sent by the other node indicates that the interference does not reach the threshold, and if so, the same, otherwise, is not the same;
  • the sending unit determines whether the interference status information recorded for the one time slot in the FI sent by the other node indicates that the interference reaches the threshold and the occupied node information is the same, and if so, the same, otherwise, not the same.
  • the processor when the sending unit generates the FI according to the latest updated slot state information of each time slot, the processor is specifically configured to:
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X1 bit recording channel indication is used for each time slot in a frame, and the occupied node STI or measurement information is recorded by using Y1 bits.
  • X1 and Y1 are preset parameters
  • Each time slot in the frame uses X2 bit to record channel indication, Y2 bit to record interference indication, or X2 bit to record channel indication, Y2 bit to record interference indication, Z bit to record occupied node STI, or X2 bit
  • the channel indication is recorded, and the measurement information is recorded in W bits, wherein X2, Y2, Z, and W are preset parameters.
  • the processor is further configured to:
  • 1 is a flow chart of a node applying a transmission time slot in the background art
  • FIG. 2 is a schematic diagram of a process of performing a time slot occupation by a node in the background art
  • FIG. 3 is a schematic diagram of a channel maintenance process performed by a node in the background art
  • FIG. 4 is a schematic diagram of a first FI format adopted by a first node in an embodiment of the present application
  • FIG. 5 is a schematic diagram of a second FI format adopted by a first node in the embodiment of the present application.
  • FIG. 6 is a flowchart of performing time slot selection by a first node in an embodiment of the present application
  • FIG. 7 and FIG. 8 are schematic diagrams showing the structure of an apparatus for performing time slot selection by a first node in an embodiment of the present application.
  • the format of the FI is redesigned, wherein whether the time slot is occupied or not is based on the occupied state recorded in the time slot state information. The information is determined, and whether the time slot is likely to collide is determined based on the measurement information recorded in the time slot status information.
  • the vehicle networking system is taken as an example, and the specific technical solutions provided are as follows:
  • each slot is composed of N bits.
  • the X1 bit is used to record the channel indication, that is, whether the decoding is correct
  • the channel indication is represented by ⁇ 0, 1 ⁇
  • 0 indicates a decoding error
  • 1 indicates that the decoding is correct
  • Y1 bit is used to record the data information (D)
  • D If the decoding is correct, D carries the user ID within the distance range of the traffic safety communication demodulated from the time slot, that is, the STI of the node occupying the time slot, and if the decoding is wrong, D carries the SINR of the R bit ( Demodulation signal-to-noise ratio) and the total received power of the Y1-R bits, where R can be 0, and the R value needs to be determined by simulation.
  • the specific length of each time slot is fixed, but the content carried by the time slot needs to be determined by the channel indication, where X1 and Y1 are preset parameters.
  • the second format is as follows: Referring to Figure 5, in the FI sent by each node, there are three possible configurations for each time slot. Into the way.
  • the X2 bit is used to record the channel indication, the channel indication is used to indicate whether the decoding is correct, the channel indication is represented by ⁇ 0, 1 ⁇ , 0 indicates a decoding error, and 1 indicates that the decoding is correct. If the decoding is correct, the interference indication is recorded by using the Y2 bit.
  • the interference indication is used to indicate whether the interference exceeds the preset threshold.
  • the interference indication is represented by ⁇ 0, 1 ⁇ , 0 indicates that the interference has not exceeded the preset threshold, and 1 indicates that the interference exceeds the preset.
  • Threshold wherein if the interference exceeds the preset threshold, the Z-bit is used to record the user ID in the range of the traffic safety communication distance demodulated by the corresponding time slot, that is, the STI of the node occupying the time slot, if the interference is not preset
  • the threshold indicates that the information recording of the corresponding time slot ends; if the decoding is wrong, the W bit is used to record the total received power of the S-bit and WR bits of the R-bit, where R can be 0, and the R value needs to be determined by simulation, wherein X2 Y2, Z, W are preset parameters
  • each node further records the slot status cache table after interacting with the FI, as shown in Table 1 and Table 2:
  • Each row in the slot state buffer table is filled in according to the content of the FI received and demodulated in each slot.
  • the "channel indication (1) + occupancy status information” is filled in to the i line correspondingly.
  • only the "channel indication (0) + SINR measured by the first node and the total received power” are filled in the i-th row and the i-th column element, and the other columns are not updated, that is, "N/A" is used. Said.
  • the nodes abcd occupy slots 0, 1, 2, and 3 respectively, and the slot N-1 is not occupied.
  • the current node e correctly receives and demodulates the FI content sent by the node acd, and the node b sends The FI content demodulation error came.
  • the current node e receives the slot state information reported by the node a, where STIa represents the STI of the node a occupying the slot 0, STIb represents the STI of the node b occupying the slot 1, and SINRa2 represents the node.
  • Pa2 represents the total received power measured by node a in time slot 2, that is, the information of node c occupying time slot 2 is not successfully demodulated, and N/A indicates that the time slot is not detected. To any signal, or the FI does not carry the slot status information of the relevant slot. When the demodulation error occurs, no information of other slots can be obtained. Only the node itself measures the SINR of the current slot + the total received power (such as the receiving slot). 1 is shown in the slot of the column in which the line is identified).
  • the nodes abcd occupy slots 0, 1, 2, and 3 respectively, and the slot N-1 is not occupied.
  • the current node e correctly receives and demodulates the FI content sent by the node acd, and the node b sends The FI content demodulation error came.
  • the current node e receives the slot state information reported by the node a, where STIa represents the STI of the node a occupying the slot 0, 1+0 represents that the decoding is correct, and the interference does not exceed the preset threshold.
  • SINRa2 represents the SINR measured by node a in slot 2
  • Pa2 represents the total received power measured by node a in slot 2 that is, the information of node c occupying slot 2 is not successfully demodulated
  • N/A indicates the time.
  • the slot does not detect any signal, or indicates that the FI does not carry the slot status information of the relevant slot.
  • no information of other slots is obtained. Only the node itself measures the SINR of the current slot + the total received power. (As indicated by the time slot of the column in which the line slot 1 is located).
  • the process of selecting a time slot on the Internet of Vehicles is as follows:
  • Step 600 The first node listens to the FI sent by the other node, and after listening to the 1 frame, the UE selects its own transmission time slot according to the result of the monitoring of the FI, and each FI carries the N reported by the corresponding node.
  • the slot state information of the slot, each slot state information includes occupied state information or measurement information of the slot, and N is the number of slots included in one frame.
  • the occupied status information included in the FI is the occupied node information, that is, the STI of the occupied node, and the measurement information is “SINR+receive total power”.
  • the occupancy status of the FI is “interference not exceeded threshold indication” or “interference super threshold indication + STI of the occupied node”, and the measurement information is “SINR+receive total power”.
  • the first node when selecting the sending time slot, the first node needs to perform monitoring of one frame of data, that is, continuously receiving and determining the FI sent by other nodes from the first time slot of the first frame, and recording the FI carried in each FI.
  • the slot state information of N slots until the end of N slots of a service transmission period.
  • the first node may filter out the selected time slots that are not occupied by other nodes according to the recorded slot state information of each time slot, where the first node records the at least one time slot recorded in the FI sent by the other node.
  • the slot status information for example, all of the measurement information, that is, SINR+receive total power, or part of the measurement information, part is N/A
  • the at least one time slot is determined to be selected. Gap.
  • the first node determines that there is occupancy status information (eg, 1+STI or 0) in the slot status information recorded for the at least one time slot in the FI sent by the other node, the time slot is not selected as the candidate to be selected. Time slot.
  • the first node determines that the at least one candidate time slot is used as the candidate transmission time slot when the measurement information recorded by the other node for the at least one candidate time slot is lower than the preset threshold.
  • the slot state information recorded for slot 1 in the FI sent by other nodes received by the first node is measurement information, that is, all other nodes corresponding to slot 1 are “SINR+receive total power”, and all The measurement information recorded by the node is lower than the preset threshold. That is, the SINR of all other nodes is lower than the preset SINR threshold, and all other nodes record that the total received power is lower than the preset total receiving power threshold.
  • the node uses slot 1 as a candidate transmission slot.
  • the first node may select multiple other time slots similar to slot 1 as candidate transmission slots.
  • the first node selects one of the selected candidate transmission slots as the final transmission slot.
  • the first node directly selects it as the final transmission time slot, and if there are multiple candidate transmission time slots, the first node randomly selects one candidate transmission time.
  • the slot is used as the final transmission slot, or the maximum received total power of each candidate transmission slot may be separately determined, and the candidate transmission slot with the smallest maximum received total power is selected as the final transmission slot.
  • the maximum received total power of a candidate transmission slot refers to the total received power of the total received power in the FI reported by the other node for the candidate transmission slot record.
  • the measurement information corresponding to one slot includes the SINR+the total received power, and then, when the candidate transmission slot is selected, the following operations may be adopted:
  • the total received power recorded in the i-th column element corresponding to the time slot i is less than the preset power threshold and the recorded SINR is also less than the preset SINR threshold, it indicates that the time slot i may be idle, and the time slot i is determined to be idle. Available and added to the candidate time slot;
  • the slot i is a strong interference slot of the occupied node of the slot k. That is, the time slot i may have a collision, or is occupied by two or more than two other nodes outside the traffic safety communication demand distance, then it is determined that the time slot i is not available;
  • the kth row element is not considered, and accordingly, the slot i is also determined to be unavailable.
  • Step 610 The first node continues to listen to the FI sent by other nodes in the non-self-sending time slot, and updates the time slot status information of each time slot of the local record according to the monitoring result and the self-measurement result.
  • the first node continues to listen to the FI sent by other surrounding nodes received in each time slot of the subsequent frame, and updates the locally saved time slot state cache according to the latest FI.
  • the slot status information recorded in the table that is, the slot status buffer table updates the corresponding row in each slot, and always stores the slot status information of the latest received N slots). Wait until the previous time slot of the selected transmission time slot ends (for example, if the time slot p is selected, wait until the time slot p-1 ends), and use the latest N*N time slot status cache table to check the latest information sent by other nodes.
  • the occupied status information is recorded in the FI for the transmission time slot and the recorded measurement information is smaller than the preset threshold (that is, the transmission time slot is never occupied by other nodes), and if so, the selected transmission time slot is maintained, otherwise, the Select the transmission slot.
  • the first node after the first node selects the transmission time slot, it can determine whether the selected transmission time slot can be used according to all FIs sent by other newly received nodes before the next time the transmission time slot is reached, or After selecting the transmission time slot, before receiving the transmission time slot next time, every time an FI sent by another node is received, when the time slot state cache table is updated, it is determined whether a transmission time slot selected by itself can be used.
  • the first node when the first node performs real-time update on the slot state information of a time slot i (hereinafter referred to as slot i) of the local record according to the monitoring result, the first node includes, but is not limited to, the following three modes:
  • the first node correctly demodulates the FI sent by the other node when the time slot i arrives, and the occupied state information or measurement information included in the time slot state information of each time slot carried in the FI, where the occupied status information is
  • the node of the occupied node of the corresponding time slot temporarily identifies the STI, and then updates the time slot status information of each time slot according to the obtained FI.
  • the FI sent by the other node is directly updated to the time slot i.
  • the content recorded in the i-th column of the row is definitely "channel indication (1) + STI occupying node n".
  • the first node After listening to a frame, the first node can update the N*N two-dimensional slot state cache table according to the FI of all nodes in the received frame.
  • the interference state information of the time slot is updated according to the obtained FI, and the interference state information reported by the occupied node of the time slot i indicates that the signal interference of the time slot i does not reach the setting gate. Adjusting the interference state information of the time slot i when the signal interference measured by the time slot i reaches the set threshold time limit;
  • the FI sent by the other node is directly updated to the time slot i.
  • it is necessary to determine whether the content of the element record of the i-th row and the i-th column of the updated slot needs to be modified that is, whether the slot state information reported by the occupied node of the slot i needs to be modified
  • the first node does not modify the corresponding The slot state information updated by slot i, the content of which is still "channel indication (1) + interference indication (1) + STI occupying node n";
  • the first node needs to further according to itself.
  • the signal measured by the time slot i determines whether the interference level of the time slot i reaches a preset interference threshold. If yes, the time slot status information updated by the corresponding slot i needs to be modified, and the modified content is “channel indication (1)+ The interference indication (1) + occupies the STI of the node n. Otherwise, it is not necessary to modify the slot state information updated by the corresponding slot i, and the content thereof is still "channel indication (1) + interference indication (0)".
  • the first node After listening to a frame, the first node can update the N*N two-dimensional slot state cache table according to the FI of all nodes in the received frame.
  • the slot status information is recorded as the reception status measurement information of the slot measurement itself.
  • the slot state information of the slot i is recorded as "channel indication (0) + SINR of the R bit of the slot i obtained by the first node measurement and 8- The total received power of the R bits; updated to the i-th row and the i-th column of the corresponding slot i in the slot state buffer table, the contents of the other columns are not updated, and are still invalid values "N/A".
  • the time slot i is not a candidate time slot, and the first node receives the FI transmitted by other nodes in a time slot other than the transmission time slot, where the time slot i is other time slots except the selected transmission time slot.
  • Step 620 The first node generates FI according to the latest updated slot state information of each slot, and transmits when the next transmission slot is reached.
  • the first node When the first node generates the FI according to the latest updated slot state information of each time slot, the following may be adopted:
  • the first node fills its own identification information as the occupancy status information into the information field corresponding to the transmission slot selected by the FI itself;
  • the first node fills the occupancy status information into the information field corresponding to the one time slot in the FI;
  • the first node fills in the idle status information or measurement information that is monitored by the first time slot in the FI when the first time slot arrives.
  • the gap corresponds to the information field.
  • the first node fails to record the occupied state information in the corresponding one of the FIs sent by the other node, the first node fills in the information field corresponding to the one time slot in the FI when the first time slot arrives.
  • the first node may adopt the following three methods:
  • the first node determines whether the occupied node information recorded for one time slot in the FI sent by the other node is the STI of the same node, and if so, the same, otherwise, is not the same;
  • the first node determines whether the interference state information recorded in the FI for the time slot recorded by the other node indicates that the interference does not reach the threshold, and if so, the same, otherwise, is not the same;
  • the first node determines whether the interference status information recorded for the one time slot in the FI sent by the other node indicates that the interference reaches the threshold and the occupied node information is the same, and if so, the same, otherwise, no the same.
  • the information field corresponding to the time slot p in the FI is filled in as "channel indication (1) + STI of the first node";
  • the information field corresponding to the time slot i in the FI is filled in as "channel indication (1) + occupied STI";
  • the valid information in the i-th column is “occupied STI”, but there are different STIs, it means that there are twice or more than 2 times the traffic safety communication demand.
  • the nodes outside the distance select the same time slot i, and if there is a collision, then The STI recorded in the i-th row and the i-th column element is filled in the information field corresponding to the time slot i in the FI, that is, filled in as "channel indication (1) + occupied STI"; wherein, if the i-th row and the i-th column element do not record the STI Instead, the "SINR + total received power" measured by the first node itself is recorded, and then it is filled in the corresponding information field in the FI, that is, filled in as "channel indication (0) + SINR + total received power".
  • the time in the FI will be
  • the information field information corresponding to slot i is filled in as "channel indication (0) + 'SINR + total received power' of the i-th row and i-th column element"; wherein, if Nbit (N is the total length of measurement information), the total received power is Then, the information field corresponding to slot i is filled in as "channel indication (0) + i-th row i-th column element The total received power of the prime, that is, the measured value of the first node itself.
  • the FI information of the node m is sent to the surrounding nodes in the time slot p. And clear the line corresponding to slot p in the slot state cache table.
  • the information field corresponding to the time slot p in the FI is filled in as "channel indication (1) + interference indication (0)";
  • the information field corresponding to the i-th time slot in the FI is filled in as "channel indication (1) + interference indication (0)";
  • the valid information of the i-th column is "occupied interference threshold + STI" and the STI is the same, the information field corresponding to the slot i in the FI is filled in as "channel indication (1) + interference indication (1) + occupied STI ";
  • the channel indication (1) + interference indication ( 1) + the STI of the i-th row of the i-th column element is filled into the information field corresponding to the slot i in the FI;
  • the FI is The information field corresponding to the time slot i is filled in as "channel indication (0) + 'SINR + total received power' of the i-th row and i-th column element"; wherein, if Nbit is the total received power, the time slot i
  • the corresponding information field is filled in as the total received power of the channel indication (0) + the i-th row and the i-th column element, that is, the measured value of the first node itself is filled.
  • the FI can be sent to the surrounding nodes in the time slot p. And clear the line corresponding to slot p in the slot state cache table.
  • the first node when generating FI, may adopt, but is not limited to, the following two methods:
  • the first mode is: filling the corresponding information fields in the FI according to the slot state information of all time slots in a frame, where the X1 bit is used to record the channel indication for each time slot in a frame, and the Y1 bit is used. Record occupancy status information or measurement information, where X1 and Y1 are preset parameters; see FIG. 4 for details.
  • the first node generates the FI in the first manner.
  • N slot state information is sequentially filled into the FI.
  • the second mode is: filling the corresponding information fields in the FI according to the slot state information of each time slot in a frame, where the X2 bit is used to record the channel indication for each time slot in a frame, and the Y2 bit is used. Recording the interference indication, or using the X2 bit to record the channel indication, using the Y2 bit to record the interference indication, using the Z bit to record the occupied node STI, or using the X2 bit to record the channel indication, using the W bit to record the measurement information, where X2, Y2, Z and W are preset parameters; see Figure 5 for details.
  • the first node generates the FI in the second manner.
  • the corresponding time slot record has an "interference indication" and a "occupied node SIT", that is, a 1-bit channel indication (1) + 1 bit interference indication (1) + The STI of the 8-bit occupied node is filled in the FI in turn;
  • the corresponding time slot record has an "interference indication", that is, the 1-bit channel indication (1) + 1 bit interference indication (0) is sequentially filled into the FI;
  • N slot state information is sequentially filled into the FI.
  • the first node continues to receive the FI sent by other nodes, that is, the monitoring feedback, and the first node determines the slot status information recorded by the sending time slot selected by the first node in the FI sent by the other node. Whether the valid occupancy status information contained in the message is the same, if yes, the access is confirmed to be successful, otherwise, the transmission time slot is reselected.
  • the first node starts from the time slot p+1, listens to N-1 time slots, and generates a (N-1)*N time slot state cache table in the time slot p+N- The end of 1 (ie, the beginning of the slot P+N) determines the N-1 elements in the column corresponding to slot p:
  • the access is confirmed to be successful
  • the transmission slot is reselected.
  • the time slot state cache table needs to be updated according to the received FI content in each time slot. And, as in step 610, each time slot needs to confirm whether the time slot selected by the first node has a collision according to the FI content of the received surrounding node.
  • an apparatus for selecting a time slot includes:
  • the selecting unit 700 is configured to monitor the frame information FI sent by other nodes, and after listening to the 1 frame, the selected transmission time slot is selected according to the result of the monitoring of the FI and the self-measurement information, wherein each FI carries the corresponding node report.
  • Slot state information of N time slots each time slot state information includes occupation state information or measurement information of the time slot, where N is The number of time slots included in one frame;
  • the updating unit 710 is configured to continue to listen to the FI sent by other nodes, and update the slot state information of each time slot of the local record according to the monitoring result and the self measurement result;
  • the processing unit 720 is configured to generate FI according to the latest updated slot state information of each slot, and send when the next transmission slot is reached.
  • the listening unit sends the FI sent by the other node, and after listening to the 1 frame, and according to the result of the monitoring of the FI, combined with the self-measurement information, and selecting the transmission time slot of the user, the selecting unit 700 is specifically configured to:
  • Time slot Selecting a time slot to be selected according to the FI sent by the other node, where at least one time slot is selected as the candidate when there is no occupied state information in the slot state information recorded for the at least one time slot in the FI sent by the other node.
  • a candidate transmission slot is selected as the transmission slot.
  • the selecting unit 700 is specifically configured to:
  • one candidate transmission slot is directly selected as the final transmission slot
  • one candidate transmission slot is randomly selected as the final transmission slot, or the maximum received total power of each candidate transmission slot is determined, and the maximum received total power is selected.
  • the candidate transmission time slot with the smallest value is taken as the final transmission time slot, wherein the maximum total received power of one candidate transmission time slot refers to the total received power in the FI reported by other nodes for one candidate transmission time slot record. The maximum received total power.
  • the continuation unit 710 is specifically configured to: continually monitor the FI sent by the other node, and update the time slot status information of each time slot of the local record according to the monitoring result and the self-measurement result.
  • the FI sent by another node is received in one slot, and the FI sent by another node received last time is updated according to the received FI.
  • the FI carries the slot status information of the N slots reported by other nodes.
  • the continuation unit 710 is specifically configured to: continually monitor the FI sent by the other node, and update the time slot status information of each time slot of the local record according to the monitoring result and the self-measurement result.
  • the update unit 710 is configured to determine whether the corresponding transmission time slot of the first node is not recorded with the occupation status information and the recorded measurement information is less than the preset threshold according to the newly saved time slot status information of each time slot. Specific use to:
  • the updating unit 710 is specifically configured to:
  • the slot state information of each time slot carried in the FI includes occupation status information or measurement information, where the occupied status information is the node of the occupied node of the corresponding time slot.
  • the slot state information of each time slot carried in the FI includes the occupied state information or the measurement information, where the occupied state information is the interference state information of the corresponding time slot. Then, the slot state information of each time slot is updated according to the obtained FI, and the interference state information reported by the occupied node that determines the time slot indicates that the signal interference of one time slot does not reach the set threshold and the signal measured by itself in one time slot When the interference reaches the set threshold, the interference state information of one time slot is adjusted;
  • each slot state information corresponding to one slot is recorded as measurement information measured by itself in one slot.
  • the processing unit 720 is specifically configured to:
  • the sending unit fills the occupation status information into the information field corresponding to a time slot in the FI;
  • the sending unit fills in the information corresponding to the time slot of the one slot in the FI when the time slot arrives. Within the domain.
  • the sending unit will fill in the measurement information that is monitored by the time slot for the time slot.
  • the determining unit 720 is specifically configured to: when determining whether the occupation status information recorded for the one time slot in the FI sent by the other node is the same:
  • the sending unit determines whether the occupied node information recorded for one time slot in the FI sent by the other node is the STI of the same node, and if yes, the same, otherwise, is not the same;
  • the sending unit determines whether the interference state information recorded for the one time slot in the FI sent by the other node indicates that the interference does not reach the threshold, and if so, the same, otherwise, is not the same;
  • the sending unit determines whether the interference status information recorded for the one time slot in the FI sent by the other node indicates that the interference reaches the threshold and the occupied node information is the same, and if so, the same, otherwise, not the same.
  • the processing unit 720 is specifically configured to:
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X1 bit recording channel indication is used for each time slot in a frame, and the occupied node STI or measurement information is recorded by using Y1 bits.
  • X1 and Y1 are preset parameters
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X2 bit recording channel indication is used for each time slot in a frame, and the interference indication is recorded by Y2 bit, or
  • the X2 bit records the channel indication, uses the Y2 bit to record the interference indication, uses the Z bit to record the occupied node STI, or uses the X2 bit to record the channel indication, and uses the W bit to record the measurement information, where X2, Y2, Z, and W are preset parameters.
  • the processing unit 720 is specifically configured to:
  • a device for selecting a time slot includes a processor 800, a transceiver 810, a memory 820, and a user interface 830, where:
  • the processor 800 is configured to read a program in the memory and perform the following process:
  • the transceiver 810 monitors the FIs sent by other nodes, and after listening to the 1 frame, the UE selects its own transmission time slot according to the result of the monitoring of the FI, and each FI carries the N time slots reported by the corresponding node.
  • the slot status information, each slot status information includes occupancy status information or measurement information of the time slot, N is the number of time slots included in one frame, and continues to listen to the FI sent by other nodes through the transceiver 810, and according to the monitoring
  • the result and the self-measurement result update the time slot status information of each time slot of the local record in real time, and the latest update according to each time slot
  • the new slot status information generates FI and is sent when the next transmission slot is reached;
  • the transceiver 810 is configured to receive and transmit data under the control of the processor.
  • the processor 800 monitors the FI sent by the other node, monitors the frame, and combines the measurement result according to the result of the monitoring of the FI, and selects its own transmission time slot.
  • the processor 800 is specifically configured to:
  • Time slot Selecting a time slot to be selected according to the FI sent by the other node, where at least one time slot is selected as the candidate when there is no occupied state information in the slot state information recorded for the at least one time slot in the FI sent by the other node.
  • a candidate transmission slot is selected as the transmission slot.
  • the processor 800 is specifically configured to:
  • one candidate transmission slot is directly selected as the final transmission slot
  • one candidate transmission slot is randomly selected as the final transmission slot, or the maximum received total power of each candidate transmission slot is determined, and the maximum received total power is selected.
  • the candidate transmission time slot with the smallest value is taken as the final transmission time slot, wherein the maximum total received power of one candidate transmission time slot refers to the total received power in the FI reported by other nodes for one candidate transmission time slot record. The maximum received total power.
  • the processor 800 is specifically configured to:
  • the FI sent by another node is received in one slot, and the FI sent by another node received last time is updated according to the received FI.
  • the FI carries the slot status information of the N slots reported by other nodes.
  • the processor 800 is specifically configured to:
  • the processor 800 is determined according to the newly saved time slot state information of each time slot, whether the corresponding transmission time slot of the first node is not recorded with the occupied state information, and the recorded measurement information is less than the preset threshold. Specifically used for:
  • the processor 800 is specifically configured to:
  • the slot state information of each time slot carried in the FI includes occupation status information or measurement information, where the occupied status information is the node of the occupied node of the corresponding time slot.
  • the slot state information of each time slot carried in the FI includes the occupied state information or the measurement information, where the occupied state information is the interference state information of the corresponding time slot. Then, the slot state information of each time slot is updated according to the obtained FI, and the interference state information reported by the occupied node that determines the time slot indicates that the signal interference of one time slot does not reach the set threshold and the signal measured by itself in one time slot When the interference reaches the set threshold, the interference state information of one time slot is adjusted;
  • each slot state information corresponding to one slot is recorded as measurement information measured by itself in one slot.
  • the processor 800 is specifically configured to:
  • the sending unit fills the occupation status information into the information field corresponding to a time slot in the FI;
  • the sending unit fills in the information corresponding to the time slot of the one slot in the FI when the time slot arrives. Within the domain.
  • the sending unit will fill in the measurement information that is monitored by the time slot for the time slot.
  • the processor 800 when determining whether the occupation status information recorded for one time slot in the FI sent by the other node is the same, the processor 800 is specifically configured to:
  • the sending unit determines whether the occupied node information recorded for one time slot in the FI sent by the other node is the STI of the same node, and if yes, the same, otherwise, is not the same;
  • the sending unit determines that the FI sent by the other node is for a time slot. Whether the recorded interference status information indicates that the interference does not reach the threshold, and if so, the same, otherwise, not the same;
  • the sending unit determines whether the interference status information recorded for the one time slot in the FI sent by the other node indicates that the interference reaches the threshold and the occupied node information is the same, and if so, the same, otherwise, not the same.
  • the processor 800 is specifically configured to:
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X1 bit recording channel indication is used for each time slot in a frame, and the occupied node STI or measurement information is recorded by using Y1 bits.
  • X1 and Y1 are preset parameters
  • the corresponding information fields in the FI are respectively filled according to the slot state information of each time slot in a frame, wherein the X2 bit recording channel indication is used for each time slot in a frame, and the interference indication is recorded by Y2 bit, or
  • the X2 bit records the channel indication, uses the Y2 bit to record the interference indication, uses the Z bit to record the occupied node STI, or uses the X2 bit to record the channel indication, and uses the W bit to record the measurement information, where X2, Y2, Z, and W are preset parameters.
  • the processor 800 is further configured to:
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 820.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 810 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 830 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 in performing operations.

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Abstract

本申请涉及通信领域,特别涉及一种时隙选择的方法及装置,用以提高发送时隙选择的准确性及选择效率。该方法为:第一节点监听其他节点发送的FI并选定自身的发送时隙,以及继续监听其他节点发送的FI并对本地记录的各个时隙的时隙状态信息进行实时更新,再根据每一个时隙最新更新的时隙状态信息生成FI,在到达下一个发送时隙时进行发送。这样,第一节点可以根据与其他节点交互的时隙状态信息确定已被占用的时隙,通过底层测量获得的信息,确定未被占用但碰撞可能性最大的时隙,降低了发送时隙出现碰撞的可能性,提高了发送时隙选择的准确性及选择效率,同时,有利于降低信息交互的资源开销,降低系统的运行负荷。

Description

一种时隙选择的方法及装置
本申请要求在2014年9月18日提交中国专利局、申请号为201410479468.3、申请名称为“一种时隙选择的方法及装置”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
本申请涉及通信领域,特别涉及一种时隙选择的方法及装置。
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,为了满足车载自组织网络的实时性、可靠性、分布式特性的要求,可移植于不同的底层通信平台的,基于RR-ALOHA(Reliable Reserved ALOHA,可靠预约ALOHA)的车间通信协议应运而生。
RR-ALOHA协议是基于时隙结构的TDMA(Time Division Multiple Access,动态时分复用接入)的信道访问协议,不仅具有更高的可靠性和实时性,能够支持多车协作通信中单跳范围内的广播功能,且该协议可以独立于物理层之上而进行设计,因此可以在通信系统的上层MAC(Media Access Control,媒体访问控制)采用基于预约时隙的RR-ALOHA协议。
可靠预约ALOHA算法是一种基于TDMA的接入和资源分配机制,资源分配基于帧结构以slot为单位。RR-ALOHA机制中,每个节点都必须获得一个BC(Basic Channels,基本信道)。当节点获得一个BC信道后,将周期性地在BC信道对应的时隙上发送FI(Frame Information,帧信息),每N个slot构成一帧(记为Frame),每个帧中的slot的编号为0~N-1,在帧之间循环往复。每个slot中只允许一个节点进行发送,即节点之间为TDMA模式。当节点占用一个时隙后,将周期性发送固定信息组织结构的帧信息(Frame Information,FI),FI中携带本节点直接感知到的时隙占用状态,即本节点OH(One hop,一跳)范围内的节点对前一帧中的时隙的使用情况,且每个节点会在FI中指示一帧中各个slot的占用状态。每个节点通过监听其周围节点发送的FI,获取与该节点相距两跳范围内的每个节点的时隙占用状态(即时隙分配情况),并根据邻节点的FI和自己的信道使用情况及时更新时隙占用状态,并将更新后的时隙占用状态在自己发送的FI信息中体现,从而实现覆盖范围不相交的一跳簇间的时隙资源重用。
数据传输过程中,如果终端不主动放弃BC对应的时隙资源,则可一直使用占用的时隙传输数据,在这期间其他节点不能使用该时隙。当BC信道提供的带宽不能满足业务的要求时,可通过预约附加信道的方式占用其他空闲信道进行传输。对于点对点通信,节点 还可以通过预约P2P(点对点)信道进行传送,以实现相邻一跳簇中的时隙复用,提高信道的利用率。当消息需要在整个网络进行广播时,RR-ALOHA机制可以只选择有限终端进行中继,避免泛洪路由造成的网络拥塞。
FI是一个由N个时隙状态信息组成的向量,又称FI信息,其中,N为一帧中包含的时隙数。具体包括:时隙占用状态子域、STI(Source Temporary Identifier,节点临时标识)子域、优先级子域和PTP(点对点业务)标志子域。
在任意一个时隙中,时隙占用状态子域承载了该任意一个时隙的时隙状态信息,指示该任意一个时隙是否已被占用。
在任意一个时隙中,STI子域中承载了占用该任意一个时隙的节点的STI。
在任意一个时隙中,优先级子域中承载了占用该任意一个时隙的节点在该任意一个时隙发送的数据对应的优先级状态。
在任意一个时隙中,点对点业务标志子域承载了该任意一个时隙的节点业务标志;
其中,时隙状态信息的大小为1bit(比特)、STI的大小为8bit、占用时隙的节点在该时隙发送的数据对应的优先级状态的大小为2bit、PTP标志的大小为1bit。
在每一帧中,节点都必须通过本节点的发送时隙(即本节点的占用时隙)发送FI,并根据获取的邻节点的FI和本节点的信道使用情况(即本节点的时隙占用状态)即时更新本地的时隙占用状态向量(表),并将更新后的时隙占用状态在本节点发送的FI中体现出来。
每个OH簇内的所有节点都在簇内享有全连通(即在每个OH簇内的任意一节点可知道该OH簇内的所有节点的时隙占用状态)。分属于不同簇的节点如果不属于所有簇共同子集将不能直接通信(即在每个OH簇内的节点,若该节点不属于与另一簇的共同子集,则无法知道另一簇的节点的时隙占用状态)。在RR-ALOHA算法中,新的节点加入网络时,必须获取一个时隙,即需要执行信道占用流程,占用一个时隙,当该新的节点成功占用一个时隙之后,还需要对该时隙执行信道维护过程。
下面结合图1和图2举例说明节点执行的信道占用流程。
假设节点第一次申请占用一个slot(时隙),其流程图参见图1所示:
步骤101:节点在选择时隙资源前首先监听一帧的信道占用情况。
节点在开始接入过程后的一帧内,监听的该帧中的所有slot。
在节点监听该帧中的slot时,节点接收OH簇内其他节点发送的FI。若OH簇内任意一个其他节点发送的FI指示对应的slot X的时隙占用状态为忙,则节点将本地的时隙状态向量(表)中的slot X对应标记为RESERVED(已占用),否则标记为AVAILABLE(可用的)。
节点将在该帧内接收到的所有FI信息分别进行解析处理,并根据上述方式判断各个slot的时隙占用状态。
步骤102:节点从监听的帧内的时隙中,选择一个空闲时隙(即available slot)。
当某一个slot在节点本地的时隙状态向量(表)中记录的时隙占用状态为AVAILABLE,则认为该slot为空闲slot(即空闲时隙)。
由于在节点监听的一帧内可能有一个或多个空闲slot,也可能没有空闲slot,因此,若节点监听的一帧内存在多个空闲slot,则从中随机选择一个空闲slot,若节点监听的一帧内没有空闲slot,那么将比自身当前优先级低的节点占用的时隙看做空闲slot进行选择。选择空闲slot后,执行步骤103;如果没有一个空闲slot可供接入,则返回步骤101,继续监听下一帧。
步骤103:节点判断是否到达步骤102中选定的空闲slot。
假设步骤102中选定的空闲slot为slot p,则在slot p到达前,持续监听各个slot,基本的RR-RLOHA算法中并未明确是否在slot p到达之前,持续做slot p是否仍然空闲的判断。到达slot p,执行步骤104。
步骤104:节点在slot p发送FI。
按照如下规则填写FI中的各个field(域);
针对与FI中本节点的发送时隙对应的field中,填写的时隙占用状态为BUSY(可以在对应的时隙占用状态子域中填写1),且在STI子域中填写本节点的STI,在优先级子域中填写本节点在发送时隙发送的数据的优先级信息,在点对点业务标志子域填写PTP标志;
针对除本节点的发送时隙外的其他slot对应的field,如果在某一slot成功接收并解析了某一节点发送的FI,则将该slot的时隙占用状态标记为BUSY(可以在对应该slot的时隙占用状态子域中填写1),并在该slot的STI子域中填写对应节点的STI,在该slot的优先级子域中填写该节点发送数据的优先级信息,在点对点业务标志子域填写PTP标志;
如果在某一slot没有接收到FI,或者在某一slot接收到FI后无法解析(例如在某一slot接收到了由多个节点发送的FI),则将该slot标记为FREE(可以在对应该slot的时隙占用状态子域中填写0)。
节点在按照上述规则填写完毕FI中的各个field后,在时隙p发送该FI。
步骤105:监听反馈,确认本节点本次申请占用时隙是否成功。
如果本节点在发送FI后,在接收到的所有FI中,本节点的发送时隙均被本节点占用(即在接收到的所有FI中,本节点的发送时隙的时隙占用状态均被标记为忙,且对应的STI与本节点相同),则认为本次FI发送成功,否则认为本次FI发送失败。在实际应用中, 可以通过逻辑与操作实现这一过程。
节点从slot p+1开始监听一帧,如果在该帧内的所有反馈的FI中都指示slot p被该节点占用,则该节点在下一帧中继续在slot p发送FI信息;如果在从slot p+1开始的一帧内接收到的所有反馈的FI中,存在至少一个FI指示slot p的时隙占用状态为FREE,或/和,存在至少一个FI指示slot p的时隙占用状态为BUSY(忙)且slot p对应的STI与本节点不同,则认为本节点在slot p发送FI失败,即认为本节点申请占用slot p的时隙失败,返回步骤102。
节点进行信道维护(即对本节点占用的时隙进行维护)的过程如下:
在基本的RR-ALOHA中,节点在本节点占用的时隙周期性地发送FI,已通过节点间的FI交互对信道的时隙占用状况进行维护。节点如果不主动放弃本节点占用的时隙,则可以一直使用本节点占用的时隙进行数据传输。然而如果网络结构发生变化,节点则需要根据在接收时隙接收到的反馈FI持续检测本节点占用的时隙是否与其他节点占用的时隙发生了碰撞。若多个节点占用的时隙发生了碰撞,则所有占用该时隙的节点都需要释放该时隙,并重新发起接入过程,预约信道。
可以看出,信道维护过程流程是信道接入过程的一部分,下图给出信道接入过程的简图,如图3所示:
监听窗口:目的是为了了解完整的信道状态信息,此窗口结束后就可以选择时隙资源。监听窗口长度为1帧。
反馈窗口:发送FI后就开始了监听,根据反馈窗口内接收到的信息进行节点接入\维护信道是否成功的判断,节点在确定所有接收时隙上(即反馈窗口内)接收到的信息都给予节点正反馈时,节点才认为本时隙申请成功,节点开始占用此时隙。如果包含此发送时隙则反馈窗口长度为1帧,如果不包含此发送时隙则反馈窗口长度为(N-1)个时隙,N为一帧内时隙的总个数。
节点在接收时隙中每接收一次FI均需要对时隙状态向量(表)进行更新。
仍以步骤102中选定的空闲slot为slot p为例,若节点接收到的FI都指示slot p被本节点占用,即接收到的FI中对应slot p的时隙状态信息为BUSY(时隙占用状态子域中为1),并且STI子域中的STI与本节点的STI相同,则判定本节点接收到的是正反馈。
若节点接收到的FI中存在至少一个FI指示slot p空闲或/和指示slot p被其他节点占用,即节点接收到至少一个FI中的时隙状态信息为FREE(时隙占用状态子域中为0),或/和,节点接收到至少一个FI中的时隙占用状态为BUSY,且STI子域中的STI与本节点的STI不同,则判定本节点接收到的是负反馈。
在RR-ALOHA机制下,节点占用的时隙发生碰撞存在以下两种情况:
1)节点自身占用的时隙发生碰撞
存在一个或多个帧信息指示本时隙被与本节点的STI不同的其他节点占用,或存在一个或多个帧信息指示本时隙未被占用(时隙占用状态为FREE),则确定该时隙发生碰撞。
2)非节点自身占用的时隙发生碰撞
对于任一非节点自身占用的时隙,出现了两个及以上的帧信息指示该时隙被两个及以上节点(即:STI不同)占用,则确定该时隙发生碰撞。
若节点检测出某一时隙发生碰撞,则将在本节点的发送时隙向占用该时隙的节点发送包含反馈信息的FI,指示该时隙发生碰撞,对占用该时隙的节点进行负反馈;若节点检测出某一时隙未发生碰撞,则将在本节点的发送时隙向占用该时隙的节点发送包含反馈信息的FI,指示该时隙未发生碰撞,对占用该时隙的节点进行正反馈。
下面结合图2举例说明节点执行信道占用和信道维护的过程。图2中,假设每一帧中包含6个slot,节点从slot 2开始接入过程,其后的一帧内持续监听,根据开始接入后的一帧内监听结果选择slot 4作为本节点的发送时隙,然后继续监听2个slot,在到达slot 4时开始发送本节点的FI,在发送本节点的FI后的N-1个field(域)中(即在slot 5、slot 0、slot 2和slot 3中)获取其它节点针对本节点维护的时隙的反馈信息,判断节点在slot 5、slot 0、slot 2和slot 3中获取的其他节点针对本节点维护的时隙的反馈信息是否为正反馈:若是,则在之后的帧中持续获取其他节点针对本节点维护的时隙的反馈信息,并判断是否为正反馈,否则,返回选择空闲slot作为本节点的发送时隙这一操作。
由于在使用基本的RR-ALOHA算法进行节点间的通信时,节点之间周期性发送FI,节点间交互的FI信息是MAC层信息,只针对时隙状态信息、优先级信息、STI信息和PTP信息进行交互。对于没有被占用的时隙也存在碰撞的可能,只能通过接收反馈来确定时隙选择是否正确、有无时隙碰撞出现。由此可见,基本的RR-ALOUHA算法不利于降低选择时隙碰撞的可能性,时隙选择效率低下,不利于降低交互的信息开销。
发明内容
本申请实施例提供一种时隙选择的方法及装置,用以降低时隙选择发生碰撞的可能性。
本申请实施例提供的具体技术方案如下:
一种时隙选择的方法,包括:
第一节点监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态 信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目;
第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新;
第一节点根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送。
这样,第一节点可以根据与其他节点交互的通过底层测量获得的信息,确定已被占用和碰撞可能性最大的时隙,从而在选取发送时隙时避免这些时隙,进而降低了发送时隙出现碰撞的可能性,提高了发送时隙选择的准确性及选择效率,同时,有利于降低信息交互的资源开销,降低系统的运行负荷。
较佳的,第一节点监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙:
根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将至少一个时隙作为待选时隙;
确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将至少一个待选时隙作为候选发送时隙;
选取一个候选发送时隙作为发送时隙。
较佳的,选取一个候选发送时隙作为发送时隙,包括:
若仅存在一个候选发送时隙,则直接将一个候选发送时隙选定为最终的发送时隙;
若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
较佳的,第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,包括:
第一节点每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接收的一其他节点发送的FI进行更新,FI中携带有一其他节点上报的N个时隙的时隙状态信息。
较佳的,第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,包括:
第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
较佳的,第一节点根据最新保存的各个时隙的时隙状态信息,判断对应第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,包括:
第一节点选定发送时隙后,在下一次到达发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
或者,
第一节点选定发送时隙后,在下一次到达发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
这样,第一节点根据与其他节点交互的通过底层测量获得的信息,确定已被占用和碰撞可能性最大的时隙,从而在选取发送时隙时避免这些时隙,进而降低了发送时隙出现碰撞的可能性。
较佳的,第一节点根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,包括:
若第一节点在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
若第一节点在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定一时隙的占用节点上报的干扰状态信息表征一时隙的信号干扰未达到设定门限时且自身在一时隙测量的信号干扰达到该设定门限时,对一时隙的干扰状态信息进行调整;
若第一节点在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将一时隙对应的各个时隙状态信息记录为自身在一时隙测量的测量信息。
较佳的,第一节点根据每一个时隙最新更新的时隙状态信息生成FI,包括:
第一节点将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则第一节点将占用状态信息填写至FI中一时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则第一节点将一时隙到达时,自身针对一时隙监听到的占用状态信息或测量信息,填写至FI中一时隙对应的信息域内。
若其他节点发送的FI中对应一时隙未记录占用状态信息,则第一节点将一时隙到达时,自身针对一时隙监听到的测量信息,填写至FI中一时隙对应的信息域内。
较佳的,第一节点判定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同,包括:
若占用状态信息为占用节点信息,则第一节点判定其他节点发送的FI中针对一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则第一节点判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则第一节点判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
较佳的,第一节点根据每一个时隙最新更新的时隙状态信息,生成FI,包括:
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
或者,
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参数。
较佳的,进一步包括:
第一节点发送FI后,继续接收其他节点发送的FI;
第一节点判断其他节点发送的FI中,针对第一节点选取的发送时隙记录的时隙状态信 息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
一种时隙选择的装置,包括:
选择单元,用于监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目;
更新单元,用于继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新;
处理单元,用于根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送。
这样,第一节点可以根据与其他节点交互的通过底层测量获得的信息,确定已被占用和碰撞可能性最大的时隙,从而在选取发送时隙时避免这些时隙,进而降低了发送时隙出现碰撞的可能性,提高了发送时隙选择的准确性及选择效率,同时,有利于降低信息交互的资源开销,降低系统的运行负荷。
较佳的,监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙时,选择单元具体用于:
根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将至少一个时隙作为待选时隙;
确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将至少一个待选时隙作为候选发送时隙;
选取一个候选发送时隙作为发送时隙。
较佳的,选取一个候选发送时隙作为发送时隙时,选择单元具体用于:
若仅存在一个候选发送时隙,则直接将一个候选发送时隙选定为最终的发送时隙;
若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
较佳的,继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录 的各个时隙的时隙状态信息进行实时更新时,更新单元具体用于:
每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接收的一其他节点发送的FI进行更新,FI中携带有一其他节点上报的N个时隙的时隙状态信息。
较佳的,继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,更新单元具体用于:
继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
较佳的,根据最新保存的各个时隙的时隙状态信息,判断对应第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限时,更新单元具体用于:
选定发送时隙后,在下一次到达发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
或者,
选定发送时隙后,在下一次到达发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
这样,本装置根据与其他节点交互的通过底层测量获得的信息,确定已被占用和碰撞可能性最大的时隙,从而在选取发送时隙时避免这些时隙,进而降低了发送时隙出现碰撞的可能性。
较佳的,根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,更新单元具体用于:
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定一时隙的占用节点上报的干扰状态信息表征一时隙的信号干扰未达到设定门限时且自身在一时隙测量的信号干扰达到该设定门限时,对一时隙的干扰状态信息进行调整;
若在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将一时隙对应的各个时隙状态信息记录为自身在一时隙测量的测量信息。
较佳的,根据每一个时隙最新更新的时隙状态信息生成FI时,处理单元具体用于:
将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则发送单元将占用状态信息填写至FI中一时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则发送单元将一时隙到达时,自身针对一时隙监听到的占用状态信息或测量信息,填写至FI中一时隙对应的信息域内。
若其他节点发送的FI中对应一时隙未记录占用状态信息,则发送单元将一时隙到达时,自身针对一时隙监听到的测量信息,填写至FI中一时隙对应的信息域内。
较佳的,判定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同时,处理单元具体用于:
若占用状态信息为占用节点信息,则发送单元判定其他节点发送的FI中针对一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
较佳的,发送单元根据每一个时隙最新更新的时隙状态信息,生成FI时,处理单元具体用于:
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
或者,
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参 数。
较佳的,发送单元具体用于:
发送FI后,继续接收其他节点发送的FI;
判断其他节点发送的FI中,针对选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
一种时隙选择的装置,包括:
处理器,用于读取存储器中的程序,执行下列过程:
通过收发机监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目,通过收发机继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,以及根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送;
收发机,用于在处理器的控制下接收和发送数据。
这样,本装置可以根据与其他节点交互的通过底层测量获得的信息,确定已被占用和碰撞可能性最大的时隙,从而在选取发送时隙时避免这些时隙,进而降低了发送时隙出现碰撞的可能性,提高了发送时隙选择的准确性及选择效率,同时,有利于降低信息交互的资源开销,降低系统的运行负荷。
较佳的,通过收发机监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙时,处理器具体用于:
根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将至少一个时隙作为待选时隙;
确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将至少一个待选时隙作为候选发送时隙;
选取一个候选发送时隙作为发送时隙。
较佳的,选取一个候选发送时隙作为发送时隙时,处理器具体用于:
若仅存在一个候选发送时隙,则直接将一个候选发送时隙选定为最终的发送时隙;
若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指 其他节点上报的FI中针对一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
这样,处理器根据与其他节点交互的通过底层测量获得的信息,确定已被占用和碰撞可能性最大的时隙,从而在选取发送时隙时避免这些时隙,进而降低了发送时隙出现碰撞的可能性。
较佳的,通过收发机继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,处理器具体用于:
每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接收的一其他节点发送的FI进行更新,FI中携带有一其他节点上报的N个时隙的时隙状态信息。
较佳的,通过收发机继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,处理器具体用于:
继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
较佳的,根据最新保存的各个时隙的时隙状态信息,判断对应第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限时,处理器具体用于:
选定发送时隙后,在下一次到达发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
或者,
选定发送时隙后,在下一次到达发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
较佳的,根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,处理器具体用于:
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定一时隙的占用节点上报的干扰状态信息表征一时隙的信号干扰未达到设定门限时且自身在一时隙测量的信号干扰 达到该设定门限时,对一时隙的干扰状态信息进行调整;
若在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将一时隙对应的各个时隙状态信息记录为自身在一时隙测量的测量信息。
较佳的,根据每一个时隙最新更新的时隙状态信息生成FI时,处理器具体用于:
将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则发送单元将占用状态信息填写至FI中一时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则发送单元将一时隙到达时,自身针对一时隙监听到的占用状态信息或测量信息,填写至FI中一时隙对应的信息域内。
若其他节点发送的FI中对应一时隙未记录占用状态信息,则发送单元将一时隙到达时,自身针对一时隙监听到的测量信息,填写至FI中一时隙对应的信息域内。
较佳的,判定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同时,处理器具体用于:
若占用状态信息为占用节点信息,则发送单元判定其他节点发送的FI中针对一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
较佳的,发送单元根据每一个时隙最新更新的时隙状态信息,生成FI时,处理器具体用于:
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
或者,
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一 帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参数。
较佳的,处理器进一步用于:
发送FI后,继续接收其他节点发送的FI;
判断其他节点发送的FI中,针对选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
附图说明
图1为背景技术下节点申请发送时隙流程图;
图2为背景技术下节点执行时隙占用过程示意图;
图3为背景技术下节点执行信道维护过程示意图;
图4为本申请实施例中第一节点采用的第一种FI格式示意图;
图5为本申请实施例中第一节点采用的第二种FI格式示意图;
图6为本申请实施例中第一节点执行时隙选择流程图;
图7和图8为本申请实施例中第一节点执行时隙选择的装置结构示意图。
具体实施方式
为了降低时隙选择发生碰撞的可能性,提高时隙选择的效率,本申请实施例中,重新设计了FI的格式,其中,时隙是否已被占用是根据时隙状态信息中记录的占用状态信息确定的,而时隙是否有可能发生碰撞是根据时隙状态信息中记录的测量信息确定的。
本申请实施例中以车联网系统为例,提供的具体技术方案如下:
节点间在进行FI交互时,所采用的FI格式有两种,分别为:
第一种格式为:参阅图4所示,在每个节点所发送的FI中,每个时隙由N比特构成。其中,X1比特用于记录信道指示,即确定译码是否正确,信道指示用{0,1}表示,0表示译码错误,1表示译码正确;Y1比特用于记录数据信息(D),若译码正确,则D承载从该时隙解调出的交通安全通信需求距离范围内的用户ID,即占用该时隙的节点的STI,若译码错误,则D承载R比特的SINR(解调信噪比)和Y1-R比特的接收总功率,其中R可以为0,R值需要仿真确定。每个时隙的具体长度是固定不变的,但时隙承载的内容需要由信道指示来决定,其中,X1、Y1为预设参数。
可选的,本实施例中统一设定X1=1,Y1=8。
第二种格式为:参阅图5所示,在每个节点所发送的FI中,每个时隙有三种可能的构 成方式。其中,X2比特用于记录信道指示,信道指示用于指示译码是否正确,信道指示用{0,1}表示,0表示译码错误,1表示译码正确。若译码正确,则采用Y2比特记录干扰指示,干扰指示用于指示干扰是否超过预设门限,干扰指示用{0,1}表示,0表示干扰未过预设门限,1表示干扰超过预设门限,其中,若干扰超过预设门限,则采用Z比特记录相应时隙解调出的交通安全通信需求距离范围内的用户ID,即占用该时隙的节点的STI,若干扰未过预设门限,则表示相应时隙的信息记录结束;若译码错误,则采用W比特记录R比特的SINR和W-R比特的接收总功率,其中R可以为0,R值需要仿真确定,其中,X2、Y2、Z、W为预设参数
可选的,本实施例中统一设定X2=1,Y2=1、Z=8、W=8。
基于上述FI结构示意图,本申请实施例中,各个节点在交互FI后,还要进一步记录时隙状态缓存表,具体如表1和表2所示:
表1
Figure PCTCN2015086281-appb-000001
表2
Figure PCTCN2015086281-appb-000002
时隙状态缓存表里的每一行根据每个时隙接收并解调的FI的内容填写,针对正确解调的时隙i,将“信道指示(1)+占用状态信息”填写至i行相应的时隙列元素中;针对未正确 解调的时隙i,只将“信道指示(0)+第一节点测量的SINR和接收总功率”填写到第i行第i列元素中,其他列内容不更新,即用“N/A”表示。
以表1为例,假设节点abcd分别占用时隙0、1、2、3,时隙N-1没有被占用,当前节点e正确接收并解调了节点acd发来的FI内容,节点b发来的FI内容解调错误。例如在接收时隙0,当前节点e接收到节点a上报的时隙状态信息,其中,STIa代表占用时隙0的节点a的STI,STIb代表占用时隙1的节点b的STI,SINRa2代表节点a在时隙2测得到的SINR,Pa2代表节点a在时隙2测得的接收总功率,即没有成功解调出占用时隙2的c节点的信息,N/A表示该时隙未检测到任何信号,或者FI中未携带相关时隙的时隙状态信息,当解调错误时得不到其他时隙的任何信息,只有节点自身测量当前时隙的SINR+接收总功率(如接收时隙1所在一行标识的所在列的时隙所示)。
以表2为例,假设节点abcd分别占用时隙0、1、2、3,时隙N-1没有被占用,当前节点e正确接收并解调了节点acd发来的FI内容,节点b发来的FI内容解调错误。例如在接收时隙0,当前节点e接收到节点a上报的时隙状态信息,其中,STIa代表占用时隙0的节点a的STI,1+0代表译码正确,干扰未过预设门限,SINRa2代表节点a在时隙2测得到的SINR,Pa2代表节点a在时隙2测得的接收总功率,即没有成功解调出占用时隙2的节点c的信息,N/A表示该时隙未检测到任何信号,或者,表示FI中未携带相关时隙的时隙状态信息,当解调错误时得不到其他时隙的任何信息,只有节点自身测量当前时隙的SINR+接收总功率(如接收时隙1所在一行标识的所在列的时隙所示)。
下面结合附图对本申请优选的实施方式进行详细说明。
参阅图6所示,本申请实施例中,在车联网上进行时隙选择的流程如下:
步骤600:第一节点监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目。
实际应用中,若节点间采用第一种格式交互FI,则FI中包含的占用状态信息为占用节点信息,即占用节点的STI,测量信息为“SINR+接收总功率”。
若节点间采用第二种格式交互FI,则FI中包含的占用状态论处为“干扰未超门限指示”或“干扰超门限指示+占用节点的STI”,测量信息为“SINR+接收总功率”。
具体的,第一节点在选取发送时隙时,需要先进行一帧数据的监听,即从第一帧第一时隙开始连续接收并判断周围其他节点发送的FI,并记录各个FI中携带的N个时隙的时隙状态信息,直至一个业务发送周期的N个时隙结束。
其次,第一节点可以根据记录的各个时隙的时隙状态信息筛选出未被其他节点占用的待选时隙,其中,第一节点在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时(如,均为测量信息,即SINR+接收总功率,或者,部分为测量信息,部分为N/A),将上述至少一个时隙确定为待选时隙。相应的,若第一节点确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中存在占用状态信息(如,1+STI或者0),则不选择此类时隙为待选时隙。
再次,第一节点确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将上述至少一个待选时隙作为候选发送时隙。
例如,假设第一节点接收的其他节点发送的FI中针对时隙1记录的时隙状态信息均为测量信息,即其他所有节点对应时隙1记载的均是“SINR+接收总功率”,且所有节点记载的测量信息均低于预设门限,即所有其他节点记载的SINR均低于预设的SINR门限,且所有其他节点记载接收总功率均低于预设的接收总功率门限,则第一节点将时隙1作为候选发送时隙。
同理,第一节点可以选取出多个类似于时隙1的其他时隙作为候选发送时隙。
最后,第一节点从筛选出的候选发送时隙中选取一个作为最终的发送时隙。
较佳的,若仅存在一个候选发送时隙,则第一节点直接将其选定为最终的发送时隙,而若存在多个候选发送时隙,则第一节点随机选定一个候选发送时隙作为最终的发送时隙,或者,也可以先分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对这一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
例如,参阅表1所示,本申请实施例中,一个时隙对应的测量信息包含SINR+接收总功率,那么,在选取候选发送时隙时,可以将采用以下操作:
若时隙i对应的第i列元素中记录的接收总功率均小于预设功率门限且记录的SINR也均小于预设SINR门限,则说明时隙i可能为空闲,则认定时隙i是空闲可用的,并将其加入到侯选时隙中;
若时隙i对应的第i列元素中第k行记录的接收总功率大于预设功率门限且SINR小于预设SINR门限,则说明时隙i是时隙k的占用节点的强干扰时隙,即时隙i可能出现了碰撞,或,被两倍或两倍以上的交通安全通信需求距离外的其他节点占用,那么,认定时隙i不可用;
若时隙i对应的第i列元素中有第k行记录的接收总功率大于预设功率门限且SINR小 于预设SINR门限,则说明译码错误,那么不予考虑该第k行元素,相应的,也判定时隙i不可用。
步骤610:第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新。
具体的,从第二帧第一个时隙开始,第一节点继续依次监听后续帧的每个时隙接收到的周围其他节点发送的FI,并根据最新的FI更新本地保存的时隙状态缓存表中记录的时隙状态信息(即时隙状态缓存表在每个时隙都会进行更新相应的一行,并始终保存最新接收到的N个时隙的时隙状态信息)。等到选定的发送时隙的前一时隙结束(如,若选定时隙p,则等到时隙p-1结束),利用最新的N*N时隙状态缓存表,检查其他节点发送的最新FI中针对发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限(即发送时隙始终未被其他节点占用),若是,则维持选定的发送时隙,否则,重新选取发送时隙。
实际应用中,第一节点选定发送时隙后,可以在下一次到达该发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断自身选定的发送时隙是否能够使用,或者,也可以在选定发送时隙后,在下一次到达该发送时隙之前,每接收到一个其他节点发送的FI,在更新时隙状态缓存表时便判断一次自身选定的发送时隙是否能够使用。
在上述实施例中,第一节点根据监听结果对本地记录的一时隙i(以下称为时隙i)的时隙状态信息进行实时更新时,包含但不限于以下三种方式:
1)若第一节点在时隙i到达时正确解调其他节点发送的FI,且该FI中携带的各个时隙的时隙状态信息包含的占用状态信息或测量信息,其中,占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新。
例如:若第一节点采用上述第一种格式记录FI,则当第一节点在时隙i接收并正确解调到其他节点发送的FI时,将其他节点发送的FI直接更新到时隙i对应的一行中,同时,该行第i列中记录的内容为肯定为“信道指示(1)+占用节点n的STI”。
经过监听一个帧后,第一节点可以根据接收到的一帧内所有节点的FI,更新完成N*N的二维时隙状态缓存表。
2)若第一节点在时隙i到达时正确解调其他节点发送的FI,且该FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定时隙i的占用节点上报的干扰状态信息表征时隙i的信号干扰未达到设定门限时且自身在时隙i测量的信号干扰达到该设定门限时,对时隙i的干扰状态信息进行调整;
例如:若第一节点采用上述第二种格式记录FI,则当第一节点在时隙i接收并正确解调到其他节点发送的FI时,将其他节点发送的FI直接更新到时隙i对应的一行中,进一步地,还需要确定更新进来的第i行第i列元素记录的内容是否需要修改(即判断时隙i的占用节点上报的时隙状态信息是否需要修改):
若时隙i的占用节点上报的时隙状态信息中包含的占用状态信息为“干扰指示+占用STI”,即表征时隙i的干扰程度达到预设的干扰门限,则第一节点不修改对应时隙i更新的时隙状态信息,其内容依然为“信道指示(1)+干扰指示(1)+占用节点n的STI”;
若时隙i的占用节点上报的时隙状态信息中包含的占用状态信息为“干扰指示”,即表征时隙i的干扰程度未达到预设的干扰门限,则第一节点需要进一步根据自身在时隙i测量的信号,判断时隙i干扰程度是否达到预设的干扰门限,若是,则需要将对应隙i更新的时隙状态信息进行修改,修改后的内容为“信道指示(1)+干扰指示(1)+占用节点n的STI”,否则,不需要修改对应时隙i更新的时隙状态信息,其内容依然为“信道指示(1)+干扰指示(0)”。
经过监听一个帧后,第一节点可以根据接收到的一帧内所有节点的FI,更新完成N*N的二维时隙状态缓存表。
3)若第一节点在时隙i到达时未正确解调其他节点发送的FI或未接收到FI,则将时隙状态信息记录为自身在时隙测量的接收状态测量信息。
例如,无论第一节点采用上述第一种格式记录FI还是采用上述第二种格式记录FI,在相应的预设参数Y1=W=8时,当第一节点在时隙i未接收到任何其他节点发送的FI或者未能正确解调FI时,均会将时隙i的时隙状态信息记录为“信道指示(0)+第一节点测量获得的时隙i的R比特的SINR和8-R比特的接收总功率;将其更新到时隙状态缓存表中对应时隙i的第i行第i列,其他列内容不更新,仍为无效值“N/A”。
在这里需要指出的是,此时第一节点对发送时隙的选择已经完成。时隙i不是待选时隙,第一节点在除发送时隙之外的时隙接收其他节点发送的FI,这里的时隙i是除选定发送时隙外的其他时隙。
步骤620:第一节点根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送。
第一节点根据每一个时隙最新更新的时隙状态信息生成FI时,可以采用但不限于以下方式:
首先,第一节点将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
其次,若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则第一节点将该占用状态信息填写至FI中上述一时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则第一节点将上述一时隙到达时,自身针对该一时隙监听到的占用状态信息或测量信息,填写至FI中上述一时隙对应的信息域内。
若其他节点发送的FI中对应一时隙未记录占用状态信息,则第一节点将上述一时隙到达时,自身针对该一时隙监听到的测量信息,填写至FI中上述一时隙对应的信息域内;
其中,较佳的,第一节点判定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同时,可以采用但不限于以下三种方法:
A、若占用状态信息为占用节点信息,则第一节点判定其他节点发送的FI中针对一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
B、若占用状态信息为干扰状态信息,则第一节点判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
C、若占用状态信息为干扰状态信息,则第一节点判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
例如:假设第一节点使用上述第一种格式生成FI;
首先,对于当前的发送时隙,即时隙p,将FI中时隙p对应的信息域填写为“信道指示(1)+第一节点的STI”;
其次,对于其他时隙i,考察(N-1)*N时隙状态缓存表中对应的第i列的内容,其中,
若第i列的有效信息均为“占用STI”,且STI相同,则将FI中时隙i对应的信息域填写为“信道指示(1)+占用STI”;
若第i列的有效信息均为“占用STI”,但存在不同的STI,说明有两倍或两倍以上的交通安全通信需求距离外的节点选择了相同的时隙i,出现碰撞,则将第i行第i列元素记录的STI填充到FI中该时隙i对应的信息域内,即填写为“信道指示(1)+占用STI”;其中,若第i行第i列元素没有记录STI,而是记录了第一节点自身测量的“SINR+接收总功率”,则将其填入FI中对应的信息域内,即填写为“信道指示(0)+SINR+接收总功率”。
若第i列的有效信息中没有“占用STI”,即均记录为“SINR+接收总功率”,则说明第一节点针对时隙i没有正确解调出收到的信息,则将FI中该时隙i对应的信息域信息填写为“信道指示(0)+第i行第i列元素的‘SINR+接收总功率’”;其中,若Nbit(N为测量信息总长度)均为接收总功率,则时隙i对应的信息域填写为“信道指示(0)+第i行第i列元 素的接收总功率”,即填写第一节点自身的测量值。
依次填好N个时隙信息后,将节点m的FI信息在时隙p发送给周围节点。并清空时隙状态缓存表中slot p对应的行。
又例如,假设第一节点使用上述第二种格式生成FI;
首先,对于当前的发送时隙,即时隙p,将FI中时隙p对应的信息域填写为“信道指示(1)+干扰指示(0)”;
其次,对于其他时隙i,考察(N-1)*N时隙状态缓存表中对应的第i列的内容,其中,
若第i列的有效信息都为“占用干扰未过门限”,则将FI中第i时隙对应的信息域填写为“信道指示(1)+干扰指示(0)”;
若第i列的有效信息均为“占用干扰过门限+STI”,且STI相同,则将FI中时隙i对应的信息域填写为“信道指示(1)+干扰指示(1)+占用STI”;
若第i列的有效信息均为“占用干扰过门限+STI”,但STI不同,则说明两个节点选择了相同的时隙i,出现碰撞,则将“信道指示(1)+干扰指示(1)+第i行第i列元素记录的STI”填充到FI中时隙i对应的信息域内;
若第i列的有效信息中没有“占用”,即均记录为“未占用+SINR+接收总功率”,则说明第一节点针对时隙i没有正确解调出收到的信息,则将FI中该时隙i对应的信息域填写为信息填写为“信道指示(0)+第i行第i列元素的‘SINR+接收总功率’”;其中,若Nbit均为接收总功率,则时隙i对应的信息域填写为“信道指示(0)+第i行第i列元素的接收总功率,即填写第一节点自身的测量值。
第一节点按照上述各方法依次填好FI中的N个时隙对应的信息域后,便可以将FI在时隙p发送给周围节点。并清空时隙状态缓存表中slot p对应的行。
在上述实施例中,较佳的,在生成FI时,第一节点可以采用但不限于以下两种方式:
第一种方式为:根据一帧内所有时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内的每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用状态信息或者测量信息,其中,X1、Y1均为预设参数;具体参阅图4所示。
具体的,第一节点采用第一种方式生成FI。
若一时隙被占用,即对应该时隙记录有“占用STI”,则将1比特信道指示(1)和8比特占用节点的STI依次填入FI中;
若一时隙未被占用,即对应该时隙记录有“SINR+接收总功率”,则将1比特信道指示(0),以及R比特SINR和8-R比特接收总功率依次填入FI中。
按照上述方法,依次将N个时隙状态信息填充到FI中。
第二种方式为:根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内的每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W均为预设参数;具体参阅图5所示。
具体的,第一节点采用第二种方式生成FI。
若一时隙被占用且干扰程度达到预设的干扰门限,则对应该时隙记录有“干扰指示”和“占用节点SIT”,即将1比特信道指示(1)+1比特干扰指示(1)+8比特占用节点的STI依次填入FI中;
若一时隙被占用且干扰程度未达到预设的干扰门限,则对应该时隙记录有“干扰指示”,即将1比特信道指示(1)+1比特干扰指示(0)依次填入FI中;
若一时隙未被占用,即对应该时隙记录有“SINR+接收总功率”,则将1比特信道指示(0)+R比特SINR和8-R比特接收总功率依次填入FI中。
按照上述方法,依次将N个时隙状态信息填充到FI中。
进一步的,第一节点在发送FI后,会继续接收其他节点发送的FI,即监听反馈,第一节点判断其他节点发送的FI中,针对第一节点选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
例如,第一节点在时隙p发送FI后,从时隙p+1开始,监听N-1个时隙,生成(N-1)*N时隙状态缓存表,在时隙p+N-1的结尾(即时隙P+N的开头),判断时隙p对应的列中的N-1个元素:
若N-1个元素的有效值中,均记录了信道指示(1)且记录的STI为第一节点的STI,则确认接入成功;
若N-1个元素的有效值中,记录了至少一个信道指示(1)且记录的STI与第一节点的STI不相同,则重新选取发送时隙。
另一方面,待第一节点在时隙p发送FI后,从时隙p+1开始,除了监听反馈,还需要在每一时隙根据收到的FI内容更新时隙状态缓存表。并且需要如步骤610,每个时隙都需要根据收到周围节点的FI内容确认第一节点选择的时隙是否有碰撞。
基于上述实施例,参阅图7所示,一种时隙选择的装置,包括:
选择单元700,用于监听其他节点发送的帧信息FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为 一帧内包含的时隙数目;
更新单元710,用于继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新;
处理单元720,用于根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送。
较佳的,监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙时,选择单元700具体用于:
根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将至少一个时隙作为待选时隙;
确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将至少一个待选时隙作为候选发送时隙;
选取一个候选发送时隙作为发送时隙。
较佳的,选取一个候选发送时隙作为发送时隙时,选择单元700具体用于:
若仅存在一个候选发送时隙,则直接将一个候选发送时隙选定为最终的发送时隙;
若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
较佳的,继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,更新单元710具体用于:
每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接收的一其他节点发送的FI进行更新,FI中携带有一其他节点上报的N个时隙的时隙状态信息。
较佳的,继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,更新单元710具体用于:
继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
较佳的,根据最新保存的各个时隙的时隙状态信息,判断对应第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限时,更新单元710具体用 于:
选定发送时隙后,在下一次到达发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
或者,
选定发送时隙后,在下一次到达发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
较佳的,根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,更新单元710具体用于:
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定一时隙的占用节点上报的干扰状态信息表征一时隙的信号干扰未达到设定门限时且自身在一时隙测量的信号干扰达到该设定门限时,对一时隙的干扰状态信息进行调整;
若在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将一时隙对应的各个时隙状态信息记录为自身在一时隙测量的测量信息。
较佳的,根据每一个时隙最新更新的时隙状态信息生成FI时,处理单元720具体用于:
将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则发送单元将占用状态信息填写至FI中一时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则发送单元将一时隙到达时,自身针对一时隙监听到的占用状态信息或测量信息,填写至FI中一时隙对应的信息域内。
若其他节点发送的FI中对应一时隙未记录占用状态信息,则发送单元将一时隙到达时,自身针对一时隙监听到的测量信息,填写至FI中一时隙对应的信息域内。
较佳的,判定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同时,处理单元720具体用于:
若占用状态信息为占用节点信息,则发送单元判定其他节点发送的FI中针对一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
较佳的,发送单元根据每一个时隙最新更新的时隙状态信息,生成FI时,处理单元720具体用于:
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
或者,
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参数。
较佳的,处理单元720具体用于:
发送FI后,继续接收其他节点发送的FI;
判断其他节点发送的FI中,针对选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
基于上述实施例,参阅图8所示,本申请实施例中,一种时隙选择的装置包括处理器800、收发机810、存储器820和用户接口830,其中:
处理器800,用于读取存储器中的程序,执行下列过程:
通过收发机810监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目,通过收发机810继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,以及根据每一个时隙最新更 新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送;
收发机810,用于在处理器的控制下接收和发送数据。
较佳的,通过收发机监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙时,处理器800具体用于:
根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将至少一个时隙作为待选时隙;
确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将至少一个待选时隙作为候选发送时隙;
选取一个候选发送时隙作为发送时隙。
较佳的,选取一个候选发送时隙作为发送时隙时,处理器800具体用于:
若仅存在一个候选发送时隙,则直接将一个候选发送时隙选定为最终的发送时隙;
若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
较佳的,通过收发机继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,处理器800具体用于:
每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接收的一其他节点发送的FI进行更新,FI中携带有一其他节点上报的N个时隙的时隙状态信息。
较佳的,通过收发机继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,处理器800具体用于:
继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
较佳的,根据最新保存的各个时隙的时隙状态信息,判断对应第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限时,处理器800具体用于:
选定发送时隙后,在下一次到达发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
或者,
选定发送时隙后,在下一次到达发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
较佳的,根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,处理器800具体用于:
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定一时隙的占用节点上报的干扰状态信息表征一时隙的信号干扰未达到设定门限时且自身在一时隙测量的信号干扰达到该设定门限时,对一时隙的干扰状态信息进行调整;
若在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将一时隙对应的各个时隙状态信息记录为自身在一时隙测量的测量信息。
较佳的,根据每一个时隙最新更新的时隙状态信息生成FI时,处理器800具体用于:
将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则发送单元将占用状态信息填写至FI中一时隙对应的信息域内;
若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则发送单元将一时隙到达时,自身针对一时隙监听到的占用状态信息或测量信息,填写至FI中一时隙对应的信息域内。
若其他节点发送的FI中对应一时隙未记录占用状态信息,则发送单元将一时隙到达时,自身针对一时隙监听到的测量信息,填写至FI中一时隙对应的信息域内。
较佳的,判定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同时,处理器800具体用于:
若占用状态信息为占用节点信息,则发送单元判定其他节点发送的FI中针对一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙 记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
或者,
若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
较佳的,发送单元根据每一个时隙最新更新的时隙状态信息,生成FI时,处理器800具体用于:
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
或者,
根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参数。
较佳的,处理器800进一步用于:
发送FI后,继续接收其他节点发送的FI;
判断其他节点发送的FI中,针对选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
其中,在图8中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器800代表的一个或多个处理器和存储器820代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机810可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口830还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器800负责管理总线架构和通常的处理,存储器820可以存储处理器800在执行操作时所使用的数据。
显然,本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样,倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (33)

  1. 一种时隙选择的方法,其特征在于,包括:
    第一节点监听其他节点发送的帧信息FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目;
    第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新;
    第一节点根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送。
  2. 如权利要求1所述的方法,其特征在于,第一节点监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,包括:
    根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将所述至少一个时隙作为待选时隙;
    确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将所述至少一个待选时隙作为候选发送时隙;
    选取一个候选发送时隙作为发送时隙。
  3. 如权利要求2所述的方法,其特征在于,选取一个候选发送时隙作为发送时隙,包括:
    若仅存在一个候选发送时隙,则直接将所述一个候选发送时隙选定为最终的发送时隙;
    若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对所述一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
  4. 如权利要求2或3所述的方法,其特征在于,第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,包括:
    所述第一节点每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接 收的所述一其他节点发送的FI进行覆盖,所述FI中携带有所述一其他节点上报的N个时隙的时隙状态信息。
  5. 如权利要求2或3所述的方法,其特征在于,第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,包括:
    第一节点在非自身发送时隙继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应所述第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
  6. 如权利要求5所述的方法,其特征在于,第一节点根据最新保存的各个时隙的时隙状态信息,判断对应所述第一节点选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,包括:
    第一节点选定发送时隙后,在下一次到达所述发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应所述发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
    或者,
    第一节点选定发送时隙后,在下一次到达所述发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应所述发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
  7. 如权利要求5所述的方法,其特征在于,第一节点根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,包括:
    若第一节点在一时隙到达时正确解调其他节点发送的FI,且所述FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,所述占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
    若第一节点在一时隙到达时正确解调其他节点发送的FI,且所述FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,所述占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定所述一时隙的占用节点上报的干扰状态信息表征所述一时隙的信号干扰未达到设定门限时且自身在所述一时隙测量的信号干扰达到该设定门限时,对所述一时隙的干扰状态信息进行调整;
    若第一节点在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将所述一时隙对应的各个时隙状态信息记录为自身在所述一时隙测量的测量信息。
  8. 如权利要求2或3所述的方法,其特征在于,第一节点根据每一个时隙最新更新的时隙状态信息生成FI,包括:
    第一节点将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
    若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则第一节点将所述占用状态信息填写至FI中所述一时隙对应的信息域内;
    若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则第一节点将所述一时隙到达时,自身针对所述一时隙监听到的占用状态信息或测量信息,填写至FI中所述一时隙对应的信息域内;
    若其他节点发送的FI中对应一时隙未记录占用状态信息,则第一节点将所述一时隙到达时,自身针对所述一时隙监听到的测量信息,填写至FI中所述一时隙对应的信息域内。
  9. 如权利要求8所述的方法,其特征在于,第一节点判定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同,包括:
    若占用状态信息为占用节点信息,则第一节点判定其他节点发送的FI中针对所述一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
    或者,
    若占用状态信息为干扰状态信息,则第一节点判定其他节点发送的FI中针对所述一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
    或者,
    若占用状态信息为干扰状态信息,则第一节点判定其他节点发送的FI中针对所述一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
  10. 如权利要求1-8任一项所述的方法,其特征在于,第一节点根据每一个时隙最新更新的时隙状态信息,生成FI,包括:
    根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对所述一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
    或者,
    根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对所 述一帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参数。
  11. 如权利要求1-7任一项所述的方法,其特征在于,进一步包括:
    第一节点发送FI后,继续接收其他节点发送的FI;
    第一节点判断其他节点发送的FI中,针对第一节点选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
  12. 一种时隙选择的装置,其特征在于,包括:
    选择单元,用于监听其他节点发送的帧信息FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目;
    更新单元,用于继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新;
    处理单元,用于根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送。
  13. 如权利要求12所述的装置,其特征在于,所述选择单元具体用于:
    根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将所述至少一个时隙作为待选时隙;
    确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将所述至少一个待选时隙作为候选发送时隙;
    选取一个候选发送时隙作为发送时隙。
  14. 如权利要求13所述的装置,其特征在于,所述选择单元具体用于:
    若仅存在一个候选发送时隙,则直接将所述一个候选发送时隙选定为最终的发送时隙;
    若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对所述一个候选发送时隙记录的各个接收总功率中的取值最大的 接收总功率。
  15. 如权利要求13或14所述的装置,其特征在于,所述更新单元具体用于:
    每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接收的所述一其他节点发送的FI进行更新,所述FI中携带有所述一其他节点上报的N个时隙的时隙状态信息。
  16. 如权利要求13或14所述的装置,其特征在于,所述更新单元具体用于:
    继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应选定的发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
  17. 如权利要求16所述的装置,其特征在于,所述更新单元具体用于:
    选定发送时隙后,在下一次到达所述发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应所述发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
    或者,
    选定发送时隙后,在下一次到达所述发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应所述发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
  18. 如权利要求16所述的装置,其特征在于,所述更新单元具体用于:
    若在一时隙到达时正确解调其他节点发送的FI,且所述FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,所述占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
    若在一时隙到达时正确解调其他节点发送的FI,且所述FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,所述占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定所述一时隙的占用节点上报的干扰状态信息表征所述一时隙的信号干扰未达到设定门限时且自身在所述一时隙测量的信号干扰达到该设定门限时,对所述一时隙的干扰状态信息进行调整;
    若在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将所述一时隙对应的各个时隙状态信息记录为自身在所述一时隙测量的测量信息。
  19. 如权利要求13或14所述的装置,其特征在于,所述处理单元具体用于:
    将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
    若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则发送单元将所述占用状态信息填写至FI中所述一时隙对应的信息域内;
    若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则发送单元将所述一时隙到达时,自身针对所述一时隙监听到的占用状态信息或测量信息,填写至FI中所述一时隙对应的信息域内。
    若其他节点发送的FI中对应一时隙未记录占用状态信息,则发送单元将所述一时隙到达时,自身针对所述一时隙监听到的测量信息,填写至FI中所述一时隙对应的信息域内。
  20. 如权利要求19所述的装置,其特征在于,判所述处理单元具体用于:
    定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同时,若占用状态信息为占用节点信息,则发送单元判定其他节点发送的FI中针对所述一时隙记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
    或者,
    若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对所述一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
    或者,
    定其他节点发送的FI中针对一时隙记录的占用状态信息是否相同时,若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对所述一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
  21. 如权利要求12-19任一项所述的装置,其特征在于,所述处理单元具体用于:
    根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对所述一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
    或者,
    根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对所述一帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参数。
  22. 如权利要求12-18任一项所述的装置,其特征在于,所述处理单元具体用于:
    发送FI后,继续接收其他节点发送的FI;判断其他节点发送的FI中,针对选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
  23. 一种时隙选择的装置,其特征在于,包括:
    处理器,用于读取存储器中的程序,执行下列过程:
    通过收发机监听其他节点发送的FI,监听1帧后根据监听FI后的结果结合自身测量信息,选定自身的发送时隙,其中,每一个FI中携带有相应节点上报的N个时隙的时隙状态信息,每一条时隙状态信息包含该时隙的占用状态信息或测量信息,N为一帧内包含的时隙数目,通过收发机继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新,以及根据每一个时隙最新更新的时隙状态信息生成FI,并在到达下一个发送时隙时进行发送;
    收发机,用于在处理器的控制下接收和发送数据。
  24. 如权利要求23所述的装置,其特征在于,处理器具体用于:
    根据其他节点发送的FI筛选出待选时隙,其中,在确定其他节点发送的FI中针对至少一个时隙记录的时隙状态信息中不存在占用状态信息时,将至少一个时隙作为待选时隙;
    确定其他节点发送的FI中针对至少一个待选时隙记录的测量信息均低于预设门限时,将至少一个待选时隙作为候选发送时隙;
    选取一个候选发送时隙作为发送时隙。
  25. 如权利要求24所述的装置,其特征在于,处理器具体用于:
    若仅存在一个候选发送时隙,则直接将一个候选发送时隙选定为最终的发送时隙;
    若存在至少两个候选发送时隙,则随机选定一个候选发送时隙作为最终的发送时隙,或者,分别确定每一个候选发送时隙的最大接收总功率,并选定最大接收总功率的取值最小的候选发送时隙作为最终的发送时隙,其中,一个候选发送时隙的最大接收总功率是指其他节点上报的FI中针对一个候选发送时隙记录的各个接收总功率中的取值最大的接收总功率。
  26. 如权利要求24或25所述的装置,其特征在于,处理器具体用于:
    每在一时隙接收到一其他节点发送的FI,则根据接收的FI对上一次接收的一其他节点发送的FI进行更新,FI中携带有一其他节点上报的N个时隙的时隙状态信息。
  27. 如权利要求24或25所述的装置,其特征在于,通过收发机继续监听其他节点发送的FI,并根据监听结果以及自身测量结果对本地记录的各个时隙的时隙状态信息进行实时更新时,处理器具体用于:
    继续监听其他节点发送的FI,并根据最新接收的FI对本地记录的各个时隙的时隙状态信息进行更新,并判断对应选定的发送时隙是否未记录有占用状态信息且记录的测量信 息均小于预设门限,若是,则维持选定的发送时隙,否则,重新选取发送时隙。
  28. 如权利要求27所述的装置,其特征在于,处理器具体用于:
    选定发送时隙后,在下一次到达发送时隙之前,根据最新接收的其他节点发送的所有FI统一判断,对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限;
    或者,
    选定发送时隙后,在下一次到达发送时隙之前,每接收到一个其他节点发送的FI,便判断一次对应发送时隙是否未记录有占用状态信息且记录的测量信息均小于预设门限。
  29. 如权利要求27所述的装置,其特征在于,处理器具体用于:
    若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的占用节点的节点临时标识STI,则根据获得的FI对各个时隙的时隙状态信息进行更新;
    若在一时隙到达时正确解调其他节点发送的FI,且FI中携带的各个时隙的时隙状态信息包含占用状态信息或测量信息,其中,占用状态信息为相应时隙的干扰状态信息,则根据获得的FI对各个时隙的时隙状态信息进行更新,并且在确定一时隙的占用节点上报的干扰状态信息表征一时隙的信号干扰未达到设定门限时且自身在一时隙测量的信号干扰达到该设定门限时,对一时隙的干扰状态信息进行调整;
    若在一时隙到达时未正确解调其他节点发送的FI或未接收到FI,则将一时隙对应的各个时隙状态信息记录为自身在一时隙测量的测量信息。
  30. 如权利要求24或25所述的装置,其特征在于,处理器具体用于:
    将自身的标识信息作为占用状态信息,填写至FI中自身选定的发送时隙对应的信息域内;
    若其他节点发送的FI中针对一时隙记录的占用状态信息相同,则发送单元将占用状态信息填写至FI中一时隙对应的信息域内;
    若其他节点发送的FI中针对一时隙记录的占用状态信息不相同,则发送单元将一时隙到达时,自身针对一时隙监听到的占用状态信息或测量信息,填写至FI中一时隙对应的信息域内。
    若其他节点发送的FI中对应一时隙未记录占用状态信息,则发送单元将一时隙到达时,自身针对一时隙监听到的测量信息,填写至FI中一时隙对应的信息域内。
  31. 如权利要求30所述的装置,其特征在于,处理器具体用于:
    若占用状态信息为占用节点信息,则发送单元判定其他节点发送的FI中针对一时隙 记录的占用节点信息是否为同一节点的STI,若是,则相同,否则,不相同;
    或者,
    若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰未达到门限,若是,则相同,否则,不相同;
    或者,
    若占用状态信息为干扰状态信息,则发送单元判定其他节点发送的FI中针对一时隙记录的干扰状态信息是否均表征干扰达到门限且占用节点信息相同,若是,则相同,否则,不相同。
  32. 如权利要求23-30任一项所述的装置,其特征在于,处理器具体用于:
    根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X1比特记录信道指示,采用Y1比特记录占用节点STI或者测量信息,其中,X1、Y1为预设参数;
    或者,
    根据一帧内各个时隙的时隙状态信息分别填充FI中相应的信息域,其中,分别针对一帧内每一个时隙,采用X2比特记录信道指示,采用Y2比特记录干扰指示,或者,采用X2比特记录信道指示,采用Y2比特记录干扰指示,采用Z比特记录占用节点STI,或者,采用X2比特记录信道指示,采用W比特记录测量信息,其中,X2、Y2、Z、W为预设参数。
  33. 如权利要求23-29任一项所述的装置,其特征在于,处理器进一步用于:
    发送FI后,继续接收其他节点发送的FI;
    判断其他节点发送的FI中,针对选取的发送时隙记录的时隙状态信息中包含的有效的占用状态信息是否相同,若是,则确认接入成功,否则,重新选取发送时隙。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112243210A (zh) * 2020-10-15 2021-01-19 北京航空航天大学 适于车联网媒体应用的无冲突多址接入方法、装置和系统
CN114337952A (zh) * 2020-09-30 2022-04-12 烽火通信科技股份有限公司 一种通信链路协商的方法和系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106506043B (zh) * 2016-11-04 2019-07-05 重庆邮电大学 一种plc系统中的数据传输方法、控制装置及设备
CN108616839A (zh) * 2017-01-23 2018-10-02 电信科学技术研究院 选择发送资源及发送共享信息的方法、终端和外部设备
CN115988650B (zh) * 2023-03-03 2023-05-09 广东越新微系统研究院 一种动态链路时隙分配方法和装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103379650A (zh) * 2012-04-12 2013-10-30 电信科学技术研究院 一种资源碰撞的判定方法和装置
CN103378919A (zh) * 2012-04-12 2013-10-30 电信科学技术研究院 一种fi消息的传输方法及装置
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
CN103841562A (zh) * 2012-11-21 2014-06-04 电信科学技术研究院 一种时隙资源占用处理方法及装置
CN104469855A (zh) * 2013-09-13 2015-03-25 电信科学技术研究院 一种时隙资源的选择方法及装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103841652B (zh) * 2012-11-21 2017-02-22 电信科学技术研究院 一种ad hoc系统中的fi接收处理方法及装置
CN103973387B (zh) * 2013-01-30 2016-12-28 电信科学技术研究院 一种维护时隙状态信息的方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103379650A (zh) * 2012-04-12 2013-10-30 电信科学技术研究院 一种资源碰撞的判定方法和装置
CN103378919A (zh) * 2012-04-12 2013-10-30 电信科学技术研究院 一种fi消息的传输方法及装置
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
CN103841562A (zh) * 2012-11-21 2014-06-04 电信科学技术研究院 一种时隙资源占用处理方法及装置
CN104469855A (zh) * 2013-09-13 2015-03-25 电信科学技术研究院 一种时隙资源的选择方法及装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114337952A (zh) * 2020-09-30 2022-04-12 烽火通信科技股份有限公司 一种通信链路协商的方法和系统
CN114337952B (zh) * 2020-09-30 2023-06-09 烽火通信科技股份有限公司 一种通信链路协商的方法和系统
CN112243210A (zh) * 2020-10-15 2021-01-19 北京航空航天大学 适于车联网媒体应用的无冲突多址接入方法、装置和系统
CN112243210B (zh) * 2020-10-15 2021-09-03 北京航空航天大学 适于车联网媒体应用的无冲突多址接入方法、装置和系统

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