WO2017054577A1 - 一种数据传输方法和设备 - Google Patents

一种数据传输方法和设备 Download PDF

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Publication number
WO2017054577A1
WO2017054577A1 PCT/CN2016/094361 CN2016094361W WO2017054577A1 WO 2017054577 A1 WO2017054577 A1 WO 2017054577A1 CN 2016094361 W CN2016094361 W CN 2016094361W WO 2017054577 A1 WO2017054577 A1 WO 2017054577A1
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Prior art keywords
node
time
frequency resource
frequency
time slot
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English (en)
French (fr)
Inventor
冯媛
周海军
李媛媛
房家奕
赵丽
林琳
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
  • the services in the car networking system can be divided into three categories: road safety, traffic efficiency, and infotainment.
  • road safety business is the most important and typical business in the car networking system.
  • the basic requirement of this type of service is that each vehicle node needs to reliably receive the safety information sent by other vehicle nodes in the surrounding X meters, where the distance is related to the specific application and the scene.
  • the road safety service of the Internet of Vehicles system adopts self-organizing network (Ad Hoc), and its slot resource allocation mechanism mainly has two types: one is based on Carrier Sense Multiple Access with Collision Avoidance.
  • the CSMA/CA Mobile Slotted Aloha
  • MS-ALOHA Mobile Slotted Aloha
  • MAC Distributed Media Access Control
  • TDMA Dynamic Time Division Multiple Access
  • Each N slots form a frame, each frame.
  • the time slots in the numbers are 1 to N, and are cyclically repeated between frames. It is generally considered that after the vehicle node sends a Frame Information (FI) message on a time slot, it considers that the time slot is a time slot occupied by itself, and the vehicle node broadcasts the FI message on the time slot occupied by itself.
  • FI Frame Information
  • TDM Time Division Multiplex
  • the embodiments of the present disclosure provide a data transmission method and device for solving a distributed algorithm based on slot reservation, which utilizes time-frequency multiplexing to occupy time-frequency resources, and has low system spectrum utilization and resources. Waste, limited system capacity.
  • an embodiment of the present disclosure provides a data transmission method, including:
  • the first node Determining, by the first node, the first time-frequency resource occupied by the first node, in the time-frequency resource corresponding to the sub-band in which the first node is idle, on the time slot capable of performing frequency division multiplexing, where At least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of frequency division multiplexing is a second time-frequency resource occupied by the second node, the first node and the The spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the maximum distance to be satisfied between nodes having communication requirements;
  • the first node performs data transmission on the first time-frequency resource.
  • the first node selects the first node from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing.
  • the first time-frequency resources occupied including:
  • the first node After determining, by the first node, that the ratio of the occupied time slot to all the time slots is greater than or equal to a set threshold, the first node is idle for the first node from the time slot capable of frequency division multiplexing. In the time-frequency resource corresponding to the frequency band, the first time-frequency resource occupied by the first node is selected.
  • the first node selects the first node from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing.
  • the first time-frequency resource occupied also includes:
  • the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot. Wherein all subbands on the idle time slot are idle for the first node.
  • the first node determines that the frequency division is possible
  • the spatial isolation between all the second nodes on the multiplexed time slots is less than or equal to the maximum distance to be met between nodes having communication requirements, including:
  • each second node on a time slot capable of frequency division multiplexing Determining, by the first node, each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing
  • the spatial isolation between them is less than or equal to the maximum distance to be met between nodes with communication requirements;
  • the first node Determining, by the first node, the first node and the received power on the second time-frequency resource occupied by each of the second nodes on the time slot that the first node is capable of performing frequency division multiplexing Capable of performing path loss information between each of the second nodes on a frequency division multiplexed time slot, and determining, between the first node and all of the second nodes, according to the path loss information
  • the spatial isolation is less than or equal to the maximum distance to be met between nodes with communication requirements.
  • the method further includes:
  • the first node After the first node determines that the first node and the second node fail to perform frequency division multiplexing, the first node reselects the first time-frequency resource.
  • the first node determines that the first node and the second node fail to frequency division multiplexing, including:
  • the notification information sent by the third node which is sent by the third node, is used to indicate that the first node and the second node fail to perform frequency division multiplexing, and determines that the first node and the second node are frequency-divided.
  • the multiplex fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or
  • the first node determines the first node and the first Two-node frequency division multiplexing fails, including:
  • the first node detects that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the first node is in the Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, the first node determining the first node and the second node Node frequency division multiplexing failed.
  • the first node determines that the first node and the second node fail to frequency division multiplexing, including:
  • the first node detects that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to a set power threshold, where the first node is at the same location
  • the time slot in which the first time-frequency resource is located is the second time-frequency resource of the different time slot, and the information sent by the second node is successfully decoded, and between the first node and the at least one second node.
  • the spatial isolation is greater than a maximum distance to be met between nodes having communication requirements, and the first node determines that the first node and the second node fail to frequency division multiplexing.
  • the first node determines that the first node and the second node can continue to perform frequency division multiplexing, including:
  • the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, the first node is Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, and between the first node and all the second nodes
  • the spatial isolation is less than or equal to a maximum distance to be met between nodes having communication requirements, and the first node determines that the first node and the second node can continue to frequency division multiplex.
  • the method further includes:
  • the first node Determining, by the first node, that the information transmitted by at least one of the at least two nodes that use frequency division multiplexing fails to decode on the other time slot, the first node determining the at least two node frequencies The division multiplexing fails, and transmitting notification information indicating that the arbitrary two nodes fail to frequency division multiplexing is sent to at least one of the at least two nodes.
  • a node device provided by the embodiment of the present disclosure includes:
  • a processing module configured to select, from a time-frequency resource corresponding to a sub-band in which the first node is idle, in a time slot capable of performing frequency division multiplexing, the first time occupied by the first node to which the processing module belongs a frequency resource, where the at least one time-frequency resource except the time-frequency resource occupied by the first node on the time-division multiplexed time slot is a second time-frequency resource occupied by the second node,
  • the spatial isolation between the first node and all of the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;
  • transceiver module configured to perform data transmission on the first time-frequency resource.
  • the processing module is specifically configured to:
  • the time frequency corresponding to the sub-band that is idle for the first node on the time slot capable of frequency division multiplexing Among the resources is selected.
  • the processing module is further configured to:
  • the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot, where the idle time All subbands on the time slot are free for the first node.
  • the processing module determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the inter-node requirement with communication requirements.
  • the maximum distance that is met including:
  • Determining spatial isolation between the first node and each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing Degree is less than or equal to the maximum distance to be met between nodes with communication requirements;
  • the spatial isolation between the first node and all of the second nodes is less than or equal to the maximum distance to be met between nodes having communication requirements.
  • processing module is further configured to:
  • the first time-frequency resource is reselected.
  • the processing module is specifically configured to:
  • the third node that is sent by the transceiver module is used to indicate the first Determining, by the node and the second node, the frequency division multiplexing failure information, determining that the first node and the second node fail to perform frequency division multiplexing, where the third time-frequency resource occupied by the third node is located
  • the time slot is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.
  • the processing module is specifically configured to:
  • Detecting that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and when the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource with different slots, and determining that the first node and the second node fail to frequency division multiplexing.
  • the processing module is specifically configured to:
  • the received power is greater than or equal to the set power threshold, and the information sent by the second node is successfully decoded on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located, and the information is successfully
  • the spatial isolation between the first node and the at least one of the second nodes is greater than the maximum distance to be met between the nodes having communication requirements, and determining that the first node and the second node fail to frequency division multiplexing.
  • the processing module is specifically configured to:
  • the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, when the first time-frequency resource is located.
  • the information sent by the second node is successfully decoded on the second time-frequency resource with different slots, and the spatial isolation between the first node and all the second nodes is less than or equal to the communication requirement.
  • the maximum distance to be satisfied between the nodes is determined, and it is determined that the first node and the second node can continue frequency division multiplexing.
  • the transceiver module is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located;
  • the processing module is further configured to: after determining that the information sent by the at least one of the at least two nodes that use the frequency division multiplexing fails to decode on the other time slots, determine that the at least two nodes are frequency-replicated Using the failure, and controlling the transceiver module to send notification information indicating that the arbitrary two nodes fail to frequency division multiplexing to at least one of the at least two nodes.
  • Another node device includes: a transceiver, and at least one processor connected to the transceiver, wherein:
  • the processor is configured to read a program in the memory and perform the following process:
  • the first time-frequency resource occupied by the first node where the node device is located where At least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of performing frequency division multiplexing is a second time-frequency resource occupied by the second node, where the first node and the first node
  • the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements
  • the transceiver is configured to perform data transmission on the first time-frequency resource under the control of the processor.
  • the processor is specifically configured to:
  • the time frequency corresponding to the sub-band that is idle for the first node on the time slot capable of frequency division multiplexing Among the resources is selected.
  • the processor is further configured to:
  • the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot, where the idle time All subbands on the time slot are free for the first node.
  • the processor determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the inter-node requirement with communication requirements.
  • the maximum distance that is met including:
  • Determining spatial isolation between the first node and each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing Degree is less than or equal to the maximum distance to be met between nodes with communication requirements;
  • Determining, according to the received power of the second time-frequency resource occupied by each of the second nodes on the time slot that the first node is capable of performing frequency division multiplexing, that the first node is capable of performing frequency division The path loss information between each of the second nodes on the used time slot, and determining, according to the path loss information, that the spatial isolation between the first node and all the second nodes is less than Or equal to the maximum distance to be met between nodes with communication needs.
  • the processor is further configured to:
  • the first time-frequency resource is reselected.
  • the processor is specifically configured to:
  • the frequency division multiplexing can be continued, and the notification information sent by the third node, which is sent by the third node, is used to indicate that the first node and the second node fail to be frequency division multiplexed, and the first node is determined to be
  • the second node fails to perform frequency division multiplexing, where the time slot in which the third time-frequency resource occupied by the third node is located and the time slot in which the first time-frequency resource is located and the second time-frequency resource are located The time slots are different.
  • the processor is specifically configured to:
  • Detecting that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and when the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource with different slots, and determining that the first node and the second node fail to frequency division multiplexing.
  • the processor is specifically configured to:
  • Detecting that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the time slot in which the first time-frequency resource is located
  • the processor is specifically configured to:
  • the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, when the first time-frequency resource is located.
  • the information sent by the second node is successfully decoded on the second time-frequency resource with different slots, and the spatial isolation between the first node and all the second nodes is less than or equal to the communication requirement.
  • the maximum distance to be satisfied between the nodes is determined, and it is determined that the first node and the second node can continue frequency division multiplexing.
  • the transceiver is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located, according to any of the foregoing embodiments;
  • the processor is further configured to: determine that at least two pairs of frequency division multiplexing are used on the other time slots After the information sent by the at least one of the nodes fails to be decoded, determining that the at least two nodes fail to frequency division multiplexing, and controlling the transceiver module to send to the at least one of the at least two nodes.
  • the notification information of frequency division multiplexing failure of any two nodes is described.
  • the first node selects the first time from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing. a first time-frequency resource occupied by the node, and performing data transmission on the first time-frequency resource, where the time-frequency resource occupied by the first node is removed from the time slot capable of frequency division multiplexing
  • the at least one time-frequency resource is a second time-frequency resource occupied by the second node, and at least one time slot in which the first time-frequency resource is located and a time slot in which all second time-frequency resources occupied by the second node are located
  • the spatial isolation between the first node and all of the second nodes is less than or equal to the maximum distance to be met between nodes having communication requirements. Therefore, frequency division multiplexing of different time-frequency resources in the same time slot between at least two nodes having communication requirements is realized, thereby improving system spectrum utilization and improving system capacity.
  • FIG. 1 is a schematic flowchart diagram of a data transmission method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a node device according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of another node device according to an embodiment of the present disclosure.
  • the distributed algorithm scheme based on slot reservation uses Time Division Multiple Access (TDMA). Specifically, each vehicle node occupies one subframe separately. When the data packet of the vehicle node is small, the resource is wasted, and the system capacity is more limited. Therefore, Frequency Division Multiple Access (FDMA) needs to be considered, that is, multiple users use frequency division multiplexing resources, each user only occupies a part of bandwidth, improves resource utilization, and improves system capacity.
  • FDMA Frequency Division Multiple Access
  • the small signal When the power difference of the signal is greater than a certain value, the small signal is overwhelmed by the large signal. At this time, the receiving vehicle cannot correctly decode the transmission signals of all frequency divisions, resulting in the problem that some surrounding vehicles lose safety messages, and there is a safety hazard.
  • the embodiment of the present disclosure occupies time-frequency resources by introducing frequency division multiplexing in a distributed algorithm based on slot reservation, so that at least two nodes with communication requirements can be frequency-multiplexed with the same time slot.
  • Different time-frequency resources on the above thus solving the existing distributed algorithm based on time slot reservation, Due to the use of time-division multiplexing to occupy time-frequency resources, there are technical problems such as low system spectrum utilization, waste of resources, and limited system capacity.
  • first node represents any node in the car network system
  • the second node represents a node that is frequency-multiplexed with the first node in the same time slot
  • the third node represents that the first node and the second node are not frequency-division multiplexed.
  • the number of second nodes may be one or two or more.
  • the number of third nodes may be one or two or more. Embodiments of the present disclosure do not limit the number of third nodes.
  • first time-frequency resource and “second time-frequency resource” are used to distinguish different time-frequency resources, but the number of time-frequency resources and the operation priority are not used. Make restrictions.
  • the first time-frequency resource represents a time-frequency resource occupied by the first node
  • the second time-frequency resource represents a time-frequency resource occupied by the second node.
  • the manner in which the nodes (including the first node, the second node, and the third node) transmit data is configured by the system, as follows:
  • the node For data that needs to be transmitted, the node adopts the method of initial transmission + retransmission.
  • the number of retransmissions may be one time, or may be two or more times.
  • the time-frequency resources used for initial transmission and retransmission of each node may adopt a fixed transmission pattern, that is, the location of the time-frequency resource used for initial transmission and retransmission of the node is associated, as long as it is known. Any time-frequency resource occupied by the node can know the location of other time-frequency resources occupied by the node.
  • the system pre-configures the transmission pattern of the time-frequency resource used for initial transmission and retransmission of each node, that is, after determining the time-frequency resource used for the initial transmission, the transmission pattern of the time-frequency resource used according to the initial transmission and the retransmission, It is possible to determine the time-frequency resources used for retransmission.
  • the time-frequency resources used for the initial transmission and retransmission of each node may also have no transmission pattern, that is, the positions of the time-frequency resources used for initial transmission and retransmission of the nodes are independent.
  • the number of first time-frequency resources is two or more, and the number of second time-frequency resources is two or more.
  • the embodiment of the present disclosure provides a data transmission method. As shown in FIG. 1, the method includes:
  • the first node selects the first time-frequency resource occupied by the first node from the time-frequency resources corresponding to the sub-bands in which the first node is idle, on the time slot that is capable of frequency division multiplexing.
  • the at least one time-frequency resource except the time-frequency resource occupied by the first node on the time-division multiplexed time slot is the second time-frequency resource occupied by the second node, where the first node
  • the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to the maximum distance to be satisfied between nodes having communication requirements;
  • Step S12 The first node performs data transmission on the first time-frequency resource.
  • the spatial isolation mentioned refers to the geographical isolation, that is, the spatial distance between two nodes.
  • the first node selects the first occupied by the first node from the time-frequency resources corresponding to the sub-bands in which the first node is idle from the time slot capable of frequency division multiplexing. Time-frequency resources, and data transmission on the first time-frequency resource.
  • the at least one time-frequency resource except the time-frequency resource occupied by the first node on the time slot capable of frequency division multiplexing is a second time-frequency resource occupied by the second node, at least one of the foregoing
  • the time slot in which the time-frequency resource is located and the time slot in which all the second time-frequency resources occupied by the second node are located are different time slots, and the spatial isolation between the first node and all the second nodes Both are less than or equal to the maximum distance to be met between nodes with communication needs. Therefore, frequency division multiplexing of different time-frequency resources in the same time slot between at least two nodes having communication requirements is realized, thereby improving system spectrum utilization and improving system capacity.
  • the set distance to be satisfied between nodes having communication requirements may be a distance between specific geographical locations, for example, communication between two nodes having a distance less than 100 meters.
  • the set distance that needs to be satisfied between nodes having communication requirements may also be spatial isolation. For example, there is communication requirement between two nodes that are one-hop nodes.
  • the two nodes (the first node and the second node) performing frequency division multiplexing in the embodiment of the present disclosure have communication requirements, and therefore, two nodes performing frequency division multiplexing (the first node and the second node)
  • the spatial isolation between nodes must satisfy the frequency division multiplexing condition, ie
  • the spatial isolation between the two nodes (the first node and the second node) performing frequency division multiplexing is less than or equal to the maximum distance to be satisfied between nodes having communication requirements.
  • the frequency division multiplexing manner between the first node and the second node is a partial frequency division manner. That is, the first node occupies at least one first time-frequency resource in the first time slot resource, and the time slot in which the first time slot is located and the time slot in which all second time-frequency resources occupied by the second node are located are Different time slots.
  • the first node and the second node both transmit data in an initial transmission and a retransmission manner, and the first node first transmits and retransmits the time slot in which at least one of the first time-frequency resources occupied by the first time-frequency resource is located.
  • the time slot in which the second time-frequency resource occupied by the initial transmission and retransmission of the second node is located is a different time slot.
  • the first node preferentially selects the time-frequency resource on the idle time slot as the first time-frequency resource occupied by the first time slot, and selects the frequency-division multiplexing mode after the time slot occupancy rate reaches the set threshold.
  • the first node in the step S11 selects the first occupied by the first node from the time-frequency resources corresponding to the sub-bands in which the first node is idle from the time slot capable of frequency division multiplexing.
  • One-time frequency resources including:
  • the first node After determining, by the first node, that the ratio of the occupied time slot to all the time slots is greater than or equal to a set threshold, the first node is idle for the first node from the time slot capable of frequency division multiplexing. In the time-frequency resource corresponding to the frequency band, the first time-frequency resource occupied by the first node is selected.
  • the first node selects the first time from a time-frequency resource corresponding to a sub-band in which the first node is idle from a time slot capable of frequency division multiplexing.
  • the first time-frequency resource occupied by the node further includes: after determining, by the first node, that the ratio of the occupied time slot to all time slots is less than the threshold, selecting, from the time-frequency resource corresponding to the idle time slot, The time-frequency resource occupied by the first node is out, wherein all sub-bands on the idle time slot are idle for the first node.
  • the first node preferentially selects the time-frequency resource occupied by the first node from the time-frequency resources corresponding to the idle time slot, and the ratio of the occupied time slot to all the time slots. After being greater than or equal to the set threshold, the first time occupied by the first node is selected from the time-frequency resources corresponding to the sub-bands in which the first node is idle on the time slot capable of frequency division multiplexing. Time-frequency resources.
  • the first node and the second node adopt a frequency division multiplexing side.
  • the spatial isolation between the first node and all the second nodes on the same time slot is less than or equal to the maximum distance to be met between nodes having communication requirements. That is, as long as the spatial isolation between the at least one second node on the same time slot and the first node is greater than the maximum distance to be met between nodes having communication requirements, the first node cannot The same time slot is multiplexed. Therefore, the first node needs to determine the spatial isolation between itself and each second node in the time slot capable of frequency division multiplexing before selecting the first time-frequency resource occupied by the first node. Less than or equal to the maximum distance to be met between nodes with communication needs.
  • Determining, by the first node, that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements including the following Two ways:
  • the first node determines, according to location information of each second node on a time slot capable of frequency division multiplexing, each of the first node and a time slot capable of frequency division multiplexing.
  • the spatial isolation between the two nodes is less than or equal to the maximum distance that needs to be met between nodes with communication requirements.
  • the first node first determines path loss information between the first node and each of the second nodes according to received power, and then according to the first node and each of the second nodes.
  • the path loss information between the first node determines the spatial isolation between the first node and each of the second nodes, so that it can be determined whether the frequency division multiplexing condition is satisfied.
  • the first node may further perform frequency division multiplexing by combining the vehicle speed information/lane information of the vehicle to which the first node belongs. Specifically:
  • the lane in which the vehicle to which the first node belongs is the same lane as the lane in which all the vehicles to which the second node belongs; and/or the current vehicle speed of the vehicle to which the first node belongs is greater than or equal to all the first The current vehicle speed of the vehicle to which the two nodes belong.
  • the method further includes:
  • the first node After the first node determines that the first node and the second node fail to perform frequency division multiplexing, the first node reselects the first time-frequency resource.
  • the first node determines that the first node and the second node fail to perform frequency division multiplexing, and includes the following three implementation manners:
  • the mode A determines that the first node and the second node fail to frequency division multiplexing by measuring the received power on the second time-frequency resource.
  • the method further includes the following two implementations:
  • the first node determines a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located. If the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the first node is Decoding the information sent by the second node with the second time-frequency resource in which the time slot in which the first time-frequency resource is located is a different time slot, the first node determining the first node and the first node Two-node frequency division multiplexing failed.
  • the first node first detects the received power through the bottom layer to determine whether there is a second node that is frequency-multiplexed with the first node in the same time slot, and detects that the first time-frequency resource is located.
  • the received power on the second time-frequency resource with the time slot being different time slots is greater than or equal to the set second power threshold, and determining that there is a second node that is frequency-multiplexed with the first node in the same time slot.
  • the first node After determining, by the first node, that there is a second node that is frequency-multiplexed with the first node in the same time slot, and then adopting a second time slot that is different from the time slot in which the first time-frequency resource is located Whether the decoding can be successful on the time-frequency resource determines whether the frequency division multiplexing is successful. If the first node can successfully decode the information sent by the second node on the second time-frequency resource with the time slot in which the first time-frequency resource is located, the first node determines the The frequency division multiplexing of the first node and the second node fails.
  • the mode A2 the first node determines a second time-frequency resource that is different from the time slot in which the first time-frequency resource is located. If the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, the first node is Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, between the first node and the at least one second node The spatial isolation is greater than the maximum distance to be met between nodes having communication requirements, the first The node determines that the first node and the second node fail to frequency division multiplex.
  • determining, by the third node that does not frequency-multiplex the same time slot with the first node and the second node, whether the first node and the second node fail to perform frequency division multiplexing specifically:
  • Determining, by the first node, the first node and the second node according to the received notification information that is used by the third node to indicate that the first node and the second node fail to perform frequency division multiplexing The sub-multiplexing fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.
  • the third node receives information sent by the first node and the second node on the other time slots on other time slots than the time slot in which the time-frequency resource occupied by the third time zone is located.
  • Method C the mode is the combination of the foregoing mode A and mode B, specifically:
  • the first node determines that the first node and the second node can continue to perform frequency division multiplexing, including:
  • the first node detects that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, the first node is Decoding the information sent by the second node on the second time-frequency resource of the different time slots in the time slot in which the first time-frequency resource is located, and between the first node and all the second nodes
  • the spatial isolation is less than or equal to a maximum distance to be met between nodes having communication requirements, and the first node determines that the first node and the second node can continue to frequency division multiplex.
  • the first node also acts as a third party node to determine other sections. Whether the frequency division multiplexing of the points is successful. details as follows:
  • the first node receives information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located.
  • the first node Determining, by the first node, that the information transmitted by at least one of the at least two nodes that use frequency division multiplexing fails to decode on the other time slot, the first node determining the at least two node frequencies The division multiplexing fails, and transmitting notification information indicating that the at least two nodes fail to frequency division multiplexing are sent to at least one of the at least two nodes.
  • Embodiments of the present disclosure also provide principles for a node to transmit an FI message and maintain a slot state table (vector) in a frequency division multiplexing manner.
  • the frame information (FI) sent by the node is called FI message, and may also be simply referred to as FI.
  • the status information corresponding to each time slot indicated in the FI message is referred to as a time slot information field corresponding to each time slot in the FI message.
  • the three types of information given in the occupation status information corresponding to each time slot in the FI message are: time slot occupation status, resource temporary identifier (STI), and priority information.
  • STI resource temporary identifier
  • Their corresponding sub-domains are respectively called: the slot occupancy status sub-field, the STI sub-domain, and the priority sub-field included in the slot information field of each slot.
  • the first slot information field in the FI message indicates the slot information corresponding to the transmission slot of the FI message
  • the second slot information field indicates FI.
  • the information fields of each slot in the FI message may be arranged in an agreed manner. For example, the first slot information field in the FI message corresponds to slot 0.
  • the "detection domain" corresponding to the time slot refers to the slot information field corresponding to the time slot in the FI message sent in the time slot, and the “non-detection domain” refers to the time slot corresponding to the time slot in the FI that is not occupied by the time slot. Time slot information field.
  • the following is an example of any node in the car network system (ie, the first node).
  • the content of the FI message is expressed in units of the slot number of the primary time-frequency resource occupied by the first node or the time slot resource set composed of the first time-frequency resource occupied by the first node.
  • the symbol is characterized by using the number of the first slot resource occupied by the initial transmission in the set of time slot resources.
  • the primary time-frequency resource occupied by the first node is any first time-frequency resource occupied by the first node, and the secondary time-frequency resource occupied by the first node is when the first node occupies the first time.
  • the first time-frequency resource other than the any first time-frequency resource in the frequency resource.
  • the FI message is sent on any of the first time-frequency resources occupied by the first node.
  • the location of the first node is determined, and the FI information sensed by the first node is determined. It is also ok so that the FI message can carry only one. That is, although the service message is sent on all the first time-frequency resources, the FI message can be sent only on one of the first time-frequency resources, and the other first time-frequency resource is sent on the pure-time data.
  • the first node performs mapping according to the received FI message sent by other nodes, and obtains a slot state table (vector) that is currently maintained by itself, and each slot state table (vector) maintains slot information corresponding to all slots. .
  • the first node maps the received FI message to a real time slot and records it to obtain a slot state table (vector) that is currently maintained by itself.
  • the first node needs to send the FI message, it maps according to the slot state table (vector) currently maintained by itself, and obtains the FI message to be sent.
  • the first node sends an FI message.
  • the mapping may be performed in units of time-frequency resources, or may be mapped in units of time-frequency resources.
  • the first node arbitrarily receives once, then it determines that it successfully receives the data transmitted by other nodes (the combining gain can be further considered), that is, no special processing is required. If the response is successful, the feedback is successful, whether it is successfully received in the time slot of the initial transmission (such as the primary time-frequency resource) or received in the time slot of the retransmission (such as the secondary time-frequency resource).
  • a data transmission method provided by an embodiment of the present disclosure will be described below through three specific embodiments.
  • Embodiment 1 It is assumed that each node is retransmitted once, that is, the transmission of each node includes one initial transmission and one retransmission.
  • the pre-configured initial/retransmission time-frequency resource pairs are as shown in Table 1.
  • X1 represents an initial/retransmission time-frequency resource pair
  • X2 represents an initial/retransmission time-frequency resource pair.
  • Time slot 1 Time slot 2 Time slot 3 Time slot 4 Time slot 5 Subband 1 Node A Node A X1 X1 X Subband 2 Node B X2 Node B X2 X Subband 3 X X X X X X X
  • X represents an idle time-frequency resource, and there are X1 and X2 two initial/retransmission time-frequency resource pairs in the idle time-frequency resource, which all indicate a determined time-frequency resource pair.
  • the time-frequency resource When the time-frequency resource is occupied by the node C, if the time slot occupancy rate is less than the set threshold, the time-frequency resources in the idle time slot are preferentially occupied. If the time slot occupancy rate is greater than or equal to the set threshold, the frequency division multiplexing mode is used to occupy the time-frequency resources, as follows:
  • the node C For the X1 time-frequency resource pair, the node C needs to determine the distance between the node B and itself; for the X2 time-frequency resource pair, the node C needs to determine the distance between the node A and itself.
  • Node C considers frequency division multiplexing with node A to select the X2 time-frequency resource pair.
  • Embodiment 2 Principle of combined reception for initial/retransmission (including frequency division multiplexed nodes and other nodes).
  • Time slot 1 Time slot 2
  • Time slot 3 Time slot 4
  • Time slot 5 Subband 1 Node A Node A X1 X1 X Subband 2
  • Node B X2 Node B
  • X2 X Subband 3
  • Node C X X X Node C
  • Nodes A, B, and C are frequency-multiplexed into the same time slot (i.e., time slot 1), with node A and node B as transmitting nodes, and node C as a receiving node. Node C receives the decision whether to receive correctly.
  • the node C determines, by the underlying measurement, that the node A and the node B that are frequency-multiplexed with themselves are present, and further determines the time slots corresponding to the two time-frequency resources occupied by the node A and the node B.
  • node A since it is frequency-divided with node C on slot 1, information of node A can only be received on slot 2, that is, node C and node A are partial frequency division nodes.
  • Node B since it is frequency-divided with Node C on Time Slot 1, the information of Node B can only be received on Time Slot 3, that is, Node C and Node B are partial frequency division nodes.
  • Node D needs to determine whether node A: 1) has a frequency division failure; 2) whether a spatial multiplexing collision has occurred.
  • the determination of the failure of the two types of time slots is consistent with the decision principle of the partial frequency division node in (1).
  • the difference is that the reception of the node A by the node D has multiple opportunities, and the result needs to be combined.
  • the above method processing flow can be implemented by a software program, which can be stored in the storage medium.
  • a software program which can be stored in the storage medium.
  • the above method steps are performed.
  • a node device is further provided in the embodiment of the present disclosure. Since the principle of the node device solving the problem is similar to the foregoing data transmission method, the implementation of the node device may refer to the implementation of the method, and the repetition is not Let me repeat.
  • the processing module 21 is configured to select, from the time-frequency resources corresponding to the sub-bands in which the first node is idle, on the time slot capable of frequency division multiplexing, the first occupied by the first node to which the processing module belongs a time-frequency resource, wherein at least one time-frequency resource other than the time-frequency resource occupied by the first node on the time slot capable of performing frequency division multiplexing is a second time-frequency resource occupied by the second node, where The spatial isolation between the first node and all of the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;
  • the transceiver module 22 is configured to perform data transmission on the first time-frequency resource.
  • processing module 21 is specifically configured to:
  • the time frequency corresponding to the sub-band that is idle for the first node on the time slot capable of frequency division multiplexing Among the resources is selected.
  • processing module 21 is further configured to:
  • the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot, where the idle time All subbands on the time slot are free for the first node.
  • the processing module 21 determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements. ,include:
  • Determining spatial isolation between the first node and each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing Degree is less than or equal to the maximum distance to be met between nodes with communication requirements;
  • the spatial isolation between the first node and all of the second nodes is less than or equal to the maximum distance to be met between nodes having communication requirements.
  • processing module 21 is further configured to:
  • the first time-frequency resource is reselected.
  • processing module 21 is specifically configured to:
  • the sub-multiplexing fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or
  • the third node that is received by the transceiver module 22 is configured to indicate the Determining, by the node and the second node, the frequency division multiplexing failure information, determining that the first node and the second node fail to perform frequency division multiplexing, where the third time-frequency resource occupied by the third node is located
  • the time slot is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.
  • processing module 21 is specifically configured to:
  • Detecting that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and when the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource with different slots, and determining that the first node and the second node fail to frequency division multiplexing.
  • processing module 21 is specifically configured to:
  • Detecting that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the time slot in which the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource of different time slots, and the A spatial isolation between a node and at least one of the second nodes is greater than a maximum distance to be met between nodes having communication requirements, and determining that the first node and the second node fail to frequency division multiplexing.
  • processing module 21 is specifically configured to:
  • the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, when the first time-frequency resource is located.
  • the information sent by the second node is successfully decoded on the second time-frequency resource with different slots, and the spatial isolation between the first node and all the second nodes is less than or equal to the communication requirement.
  • the maximum distance to be satisfied between the nodes is determined, and it is determined that the first node and the second node can continue frequency division multiplexing.
  • the transceiver module 22 is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located.
  • the processing module 21 is further configured to: after determining that the information sent by the at least one of the at least two nodes that use the frequency division multiplexing is failed to be decoded on the other time slots, determine The at least two nodes fail to perform frequency division multiplexing, and control the transceiver module to send, to the at least one of the at least two nodes, notification information indicating that the any two nodes fail to frequency division multiplexing.
  • the node device includes a transceiver 31, and at least one processor 32 coupled to the transceiver 31, wherein:
  • the processor 32 is configured to read a program in the memory 33 and perform the following process:
  • the time-frequency resource corresponding to the sub-band in which the first node is idle the first time-frequency resource occupied by the first node to which the processing module belongs, where The at least one time-frequency resource except the time-frequency resource occupied by the first node on the time-division multiplexed time slot is the second time-frequency resource occupied by the second node, where the first node and the The spatial isolation between all of the second nodes on a time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements;
  • the transceiver 31 is configured to perform data transmission on the first time-frequency resource under the control of the processor 32.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 32 and various circuits of memory represented by memory 33.
  • 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 31 may 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 34 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 32 is responsible for managing the bus architecture and general processing, and the memory 33 can store data used by the processor 32 when performing operations.
  • the processor 32 is specifically configured to:
  • the time frequency corresponding to the sub-band that is idle for the first node on the time slot capable of frequency division multiplexing Among the resources is selected.
  • the processor 32 is further configured to:
  • the time-frequency resource occupied by the first node is selected from the time-frequency resources corresponding to the idle time slot, where the idle time All subbands on the time slot are free for the first node.
  • the processor 32 determines that the spatial isolation between all the second nodes on the time slot capable of frequency division multiplexing is less than or equal to a maximum distance to be met between nodes having communication requirements. ,include:
  • Determining spatial isolation between the first node and each second node on a time slot capable of frequency division multiplexing according to location information of each second node on a time slot capable of frequency division multiplexing Degree is less than or equal to the maximum distance to be met between nodes with communication requirements;
  • Determining, according to the received power of the second time-frequency resource occupied by each of the second nodes on the time slot that the first node is capable of performing frequency division multiplexing, that the first node is capable of performing frequency division The path loss information between each of the second nodes on the used time slot, and determining, according to the path loss information, that the spatial isolation between the first node and all the second nodes is less than Or equal to the maximum distance to be met between nodes with communication needs.
  • the processor 32 is further configured to:
  • the first time-frequency resource is reselected.
  • the processor 32 is specifically configured to:
  • the sub-multiplexing fails, wherein the time slot in which the third time-frequency resource occupied by the third node is located is different from the time slot in which the first time-frequency resource is located and the time-slot in which the second time-frequency resource is located; or
  • the third node that is received by the transceiver 31 is used to indicate the Determining, by the node and the second node, the frequency division multiplexing failure information, determining that the first node and the second node fail to perform frequency division multiplexing, where the third time-frequency resource occupied by the third node is located
  • the time slot is different from the time slot in which the first time-frequency resource is located and the time slot in which the second time-frequency resource is located.
  • the processor 32 is specifically configured to:
  • Detecting that the received power on the second time-frequency resource that is different from the time slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and when the first time-frequency resource is located Decoding the information sent by the second node on the second time-frequency resource with different slots, and determining that the first node and the second node fail to frequency division multiplexing.
  • the processor 32 is specifically configured to:
  • Detecting that the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, and the time slot in which the first time-frequency resource is located
  • the processor 32 is specifically configured to:
  • the received power on the second time-frequency resource that is different from the slot in which the first time-frequency resource is located is greater than or equal to the set power threshold, when the first time-frequency resource is located.
  • the information sent by the second node is successfully decoded on the second time-frequency resource with different slots, and the spatial isolation between the first node and all the second nodes is less than or equal to the communication requirement.
  • the maximum distance to be satisfied between the nodes is determined, and it is determined that the first node and the second node can continue frequency division multiplexing.
  • the transceiver 31 is further configured to: receive information sent by other nodes on other time slots except the time slot in which the first time-frequency resource is located.
  • the processor 32 is further configured to: after determining that the information sent by the at least one of the at least two nodes that use the frequency division multiplexing is failed to be decoded on the other time slot, determine The at least two nodes fail to perform frequency division multiplexing, and control the transceiver module to send, to the at least one of the at least two nodes, notification information indicating that the any two nodes fail to frequency division multiplexing.
  • embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a bootable computer or other programmable data processing device.
  • a computer readable memory that operates in a particular manner, causing instructions stored in the computer readable memory to produce an article of manufacture comprising an instruction device implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本公开文本实施例公开了一种数据传输方法和设备，用于解决现有基于时隙预约的分布式算法占用时频资源存在的系统频谱利用率低的问题。该数据传输方法包括：第一节点从能够进行频分复用的时隙上对于第一节点是空闲的子频带对应的时频资源中，选择出第一节点占用的第一时频资源，并在第一时频资源上，进行数据传输，其中，能够进行频分复用的时隙上除第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，第一节点与能够进行频分复用的时隙上所有第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。本公开文本实施例实现了有通信需求的至少两个节点之间频分复用同一时隙中的不同时频资源，提高了系统频谱利用率，也提高了系统容量。

Description

一种数据传输方法和设备
相关申请的交叉参考
本申请主张在2015年9月30日在中国提交的中国专利申请号No.201510642918.0的优先权，其全部内容通过引用包含于此。
技术领域
本公开文本涉及通信技术领域，特别涉及一种数据传输方法和设备。
背景技术
车联网系统中的业务可以分成三大类：道路安全类、交通效率类、信息娱乐类。其中，道路安全类业务是车联网系统中最主要也是最典型的业务。这一类业务的基本要求是：每一个车辆节点都需要可靠接收周围X米范围内其他车辆节点发送的安全信息，这里的距离与具体的应用以及场景相关。
车联网系统的道路安全类业务多采用自组织网络(Ad Hoc)，其时隙资源分配机制主要有两类：一类是基于带冲突避免的载波监听多址(Carrier Sense Multiple Access with Collision Avoidance，CSMA/CA)机制进行改进的；另外一类是基于时隙预约机制的。基于时隙预约机制中，一种较有代表性的是移动分时隙ALOHA(Mobile SlottedAloha，MS-ALOHA)协议。它是一种基于动态时分多址(Time Division Multiple Access，TDMA)的分布式媒体接入控制(MediaAccess Control，MAC)协议，每N个时隙(slot)构成一个帧(Frame)，每个帧中的时隙的编号为1～N，在帧之间循环往复。通常认为，车辆节点在一个时隙上发送了帧信息(Frame Information，FI)消息之后，就认为该时隙是自己占用的时隙，车辆节点在自己占用的时隙上会广播FI消息。
目前基于时隙预约的分布式算法中，同一时间每个时隙只允许一个车辆节点发送数据，即车辆节点之间采用时分复用(Time Division Multiplex，TDM)，每个车辆节点单独占用一个子帧。这种按照一个较大的消息的大小来为所有不同大小的数据包分配相同大小时频资源的方式，会导致系统频谱利用率低，并且当车辆节点的数据包较小时，也会导致资源浪费。并且，从 系统容量角度考虑，会存在系统容量受限的问题。
发明内容
(一)要解决的技术问题
本公开文本实施例提供了一种数据传输方法和设备，用于解决现有基于时隙预约的分布式算法，由于采用时分复用方式占用时频资源，而存在的系统频谱利用率低、资源浪费、系统容量受限的问题。
(二)技术方案
在第一方面中，本公开文本实施例提供了一种数据传输方法，包括：
第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；以及
所述第一节点在所述第一时频资源上，进行数据传输。
在其中一个可行的实施例中，所述第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，包括：
所述第一节点在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
在其中一个可行的实施例中，所述第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，还包括：
所述第一节点在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
在其中一个可行的实施例中，所述第一节点确定出与所述能够进行频分 复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括：
所述第一节点根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；或者
所述第一节点根据所述第一节点在能够进行频分复用的时隙上的每个所述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
基于上述任一实施例，所述第一节点选择出所述第一节点占用的时频资源之后，该方法还包括：
所述第一节点确定出所述第一节点与所述第二节点频分复用失败后，所述第一节点重新选择所述第一时频资源。
在其中一个可行的实施例中，所述第一节点确定所述第一节点与所述第二节点频分复用失败，包括：
所述第一节点接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同；或者
所述第一节点通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点频分复用失败；或者
所述第一节点通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，且接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，所述第一节点确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
在其中一个可行的实施例中，所述第一节点确定所述第一节点与所述第 二节点频分复用失败，包括：
所述第一节点确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；
所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码失败，所述第一节点确定所述第一节点与所述第二节点频分复用失败。
在其中一个可行的实施例中，所述第一节点确定所述第一节点与所述第二节点频分复用失败，包括：
所述第一节点确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，所述第一节点确定所述第一节点与所述第二节点频分复用失败。
在其中一个可行的实施例中，所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，包括：
若所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，所述第一节点确定所述第一节点与所述第二节点能够继续频分复用。
基于上述任一实施例，该方法还包括：
所述第一节点在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息；以及
若所述第一节点确定出在所述其他时隙上对采用频分复用的至少两个节点中的至少一个节点发送的信息解码失败，所述第一节点确定所述至少两个节点频分复用失败，并向所述至少两个节点中的至少一个节点发送用于指示所述任意两个节点频分复用失败的通知信息。
在第二方面中，本公开文本实施例提供的一种节点设备，该设备包括：
处理模块，用于从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述处理模块所属的第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度小于或等于具有通信需求的节点间需满足的最大距离；以及
收发模块，用于在所述第一时频资源上，进行数据传输。
在其中一个可行的实施例中，所述处理模块具体用于：
在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
在其中一个可行的实施例中，所述处理模块还用于：
在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
在其中一个可行的实施例中，所述处理模块确定与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括：
根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；或者
根据所述第一节点在能够进行频分复用的时隙上的每个所述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定 出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
基于上述任一实施例，所述处理模块还用于：
确定出所述第一节点与所述第二节点频分复用失败后，重新选择所述第一时频资源。
在其中一个可行的实施例中，所述处理模块具体用于：
若所述收发模块接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点频分复用失败；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，且所述收发模块接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
在其中一个可行的实施例中，所述处理模块具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码失败，确定所述第一节点与所述第二节点频分复用失败。
在其中一个可行的实施例中，所述处理模块具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的 接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点频分复用失败。
在其中一个可行的实施例中，所述处理模块具体用于：
若检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点能够继续频分复用。
基于上述任一实施例，所述收发模块还用于：在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息；并且
所述处理模块还用于：确定出在所述其他时隙上对采用频分复用的至少两个节点中的至少一个节点发送的信息解码失败后，确定所述至少两个节点频分复用失败，并控制所述收发模块向所述至少两个节点中的至少一个节点发送用于指示所述任意两个节点频分复用失败的通知信息。
本公开文本实施例提供的另一种节点设备，包括：收发机、以及与该收发机连接的至少一个处理器，其中：
所述处理器，用于读取存储器中的程序，执行下列过程：
从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述节点设备所处的第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度小于或等于具有通信需求的节点间需满足的最大距离；
所述收发机，用于在所述处理器的控制下在所述第一时频资源上，进行数据传输。
在其中一个可行的实施例中，所述处理器具体用于：
在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
在其中一个可行的实施例中，所述处理器还用于：
在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
在其中一个可行的实施例中，所述处理器确定与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括：
根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；或者
根据所述第一节点在能够进行频分复用的时隙上的每个所述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
基于上述任一实施例，所述处理器还用于：
确定出所述第一节点与所述第二节点频分复用失败后，重新选择所述第一时频资源。
在其中一个可行的实施例中，所述处理器具体用于：
若所述收发机接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点频分复用失败；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点 能够继续频分复用，且所述收发机接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
在其中一个可行的实施例中，所述处理器具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码失败，确定所述第一节点与所述第二节点频分复用失败。
在其中一个可行的实施例中，所述处理器具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点频分复用失败。
在其中一个可行的实施例中，所述处理器具体用于：
若检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点能够继续频分复用。
基于上述任一实施例，所述收发机还用于：在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息；
所述处理器还用于：确定出在所述其他时隙上对采用频分复用的至少两 个节点中的至少一个节点发送的信息解码失败后，确定所述至少两个节点频分复用失败，并控制所述收发模块向所述至少两个节点中的至少一个节点发送用于指示所述任意两个节点频分复用失败的通知信息。
(三)有益效果
本公开文本具体实施例上述技术方案中的至少一个具有以下有益效果：
本公开文本实施例提供的方法和设备中，第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，并在所述第一时频资源上，进行数据传输，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，至少一个所述第一时频资源所在的时隙与所述第二节点占用的所有第二时频资源所在的时隙为不同的时隙，所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。从而实现了有通信需求的至少两个节点之间频分复用同一时隙中的不同时频资源，提高了系统频谱利用率，也提高了系统容量。
附图说明
为了更清楚地说明本公开文本实施例或现有技术中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开文本的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开文本实施例提供的一种数据传输方法的流程示意图；
图2为本公开文本实施例提供的一种节点设备的示意图；以及
图3为本公开文本实施例提供的另一种节点设备的示意图。
具体实施方式
下面结合附图和实施例，对本公开文本的具体实施方式做进一步描述。以下实施例仅用于说明本公开文本，但不用来限制本公开文本的范围。
为使本公开文本实施例的目的、技术方案和优点更加清楚，下面将结合 本公开文本实施例的附图，对本公开文本实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开文本的一部分实施例，而不是全部的实施例。基于所描述的本公开文本的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开文本保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开文本所属领域内具有一般技能的人士所理解的通常意义。本公开文本专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不表示数量限制，而是表示存在至少一个。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也相应地改变。
为使本公开文本要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
目前基于时隙预约的分布式算法方案都采用时分多址(Time Division Multiple Access，TDMA)。具体的，每个车辆节点单独占用一个子帧，当车辆节点的数据包很小时，会导致资源浪费，更多的是系统容量受限。因此需要考虑频分多址(Frequency Division Multiple Access，FDMA)，即多个用户通过频分复用资源，每一个用户只占用一部分带宽，提高资源利用率，提高系统容量。但是就需要解决带内泄露的问题：当多个车辆同时发射信号的情况下，如果某一个车辆如果与这多个车辆都存在通信需求，就需要同时接收来自不同车辆的信号。由于in-band emission的影响，一个用户的数据会对相邻频率资源内的其他用户的信号产生干扰。当信号的功率差大于一定值时，小的信号就会被大的信号所淹没。这个时候接收车辆就不能正确解码所有频分的发送信号，导致部分周围车辆丢失安全消息的问题，存在安全隐患。
本公开文本实施例通过在基于时隙预约的分布式算法中引入了频分复用的方式来占用时频资源，以使至少两个有通信需求的节点之间可以频分复用同一时隙上的不同时频资源，从而解决了现有基于时隙预约的分布式算法， 由于采用时分复用方式占用时频资源，而存在的系统频谱利用率低、资源浪费、系统容量受限等技术问题。
为了说明本公开文本的技术方案，使用了“第一节点”、“第二节点”、“第三节点”等字样，对不同的车联网系统中的节点进行区分，但并不对节点的数量和操作优先级进行限制。例如，第一节点表示车联网系统中任一节点，第二节点表示与第一节点频分复用同一时隙的节点，第三节点表示与第一节点和第二节点均不频分复用的节点。第二节点的数量可以是一个，也可以是两个或两个以上。第三节点的数量可以是一个，也可以是两个或两个以上。本公开文本实施例不对第三节点的数量进行限定。
为了说明本公开文本的技术方案，使用了“第一时频资源”、“第二时频资源”等字样，对不同的时频资源进行区分，但并不对时频资源的数量和操作优先级进行限制。例如，第一时频资源表示第一节点占用的时频资源，第二时频资源表示第二节点占用的时频资源。
本公开文本实施例中，节点(包括第一节点、第二节点和第三节点)传输数据的方式是由系统配置的，具体如下：
对于需要传输的数据，节点采用初传+重传的方式。其中，重传次数可以是一次，也可以是两次或两次以上。
该方式下，每个节点的初传和重传所用的时频资源可以采用固定的传输pattern(图案)，即节点的初传和重传所用的时频资源的位置是相关联的，只要知道该节点占用的任一时频资源，就可以知道该节点占用的其他时频资源的位置。例如，系统预先配置每个节点的初传和重传所用的时频资源的传输pattern，即确定了初传所用的时频资源后，根据初传和重传所用的时频资源的传输pattern，就可以确定出重传所用的时频资源。每个节点的初传和重传所用的时频资源也可以没有传输pattern，即节点的初传和重传所用的时频资源的位置是独立的。
该方式下，第一时频资源的数量为两个或两个以上，第二时频资源的数量为两个或两个以上。
下面结合说明书附图对本公开文本实施例作进一步详细描述。应当理解，此处所描述的实施例仅用于说明和解释本公开文本，并不用于限定本公开文 本。
本公开文本实施例提供了一种数据传输方法，如图1所示，该方法包括：
步骤S11，第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；以及
步骤S12，所述第一节点在所述第一时频资源上，进行数据传输。
在这里，所提及的空间隔离度是指地理位置隔离度，即两个节点之间的空间距离。
本公开文本实施例中，第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，并在所述第一时频资源上，进行数据传输。其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，至少一个所述第一时频资源所在的时隙与所述第二节点占用的所有第二时频资源所在的时隙为不同的时隙，所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。从而实现了有通信需求的至少两个节点之间频分复用同一时隙中的不同时频资源，提高了系统频谱利用率，也提高了系统容量。
需要说明的是，我们一般认为满足设定的距离要求的节点间就会具有通信需求，可以通过节点间的距离来判定节点间是否存在通信需求。具体的，具有通信需求的节点间需满足的设定距离可以为具体的地理位置之间的距离，例如，距离小于100米的两个节点间具有通信需求。另外，具有通信需求的节点间需满足的设定距离也可以是空间隔离度，例如，互为一跳节点的两个节点间具有通信需求。本公开文本实施例中进行频分复用的两个节点(第一节点和第二节点)之间是具有通信需求的，因此，进行频分复用的两个节点(第一节点和第二节点)之间的空间隔离度必须都满足频分复用条件，即 进行频分复用的两个节点(第一节点和第二节点)之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
例如，在本公开文本实施例中，所述第一节点与所述第二节点之间的频分复用方式为部分频分方式。也就是说，所述第一节点占用第一时隙资源中至少存在一个第一时频资源，其所在的时隙与所述第二节点占用的所有第二时频资源所在的时隙均为不同的时隙。
举例说明，第一节点与第二节点均采用初传+重传的方式传输数据，第一节点初传和重传占用的第一时频资源中的至少一个第一时频资源所在的时隙与第二节点初传和重传占用的第二时频资源所在的时隙为不同时隙。
本公开文本实施例中，所述第一节点优先选择空闲时隙上的时频资源作为自身占用的第一时频资源，在时隙占用率达到设定阈值后，采用频分复用方式选择自身占用的第一时频资源。相应的，步骤S11中所述第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，包括：
所述第一节点在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
作为另一种实现方式，步骤S11中所述第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，还包括：所述第一节点在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
本公开文本实施例中，所述第一节点优先从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，在已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，优先从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
本公开文本实施例中，所述第一节点与所述第二节点采用频分复用的方 式占用同一时隙的时频资源时，所述第一节点与该同一时隙上的所有第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。也就是说，只要该同一时隙上的至少一个第二节点与所述第一节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，那么所述第一节点就不能频分复用该同一时隙。因此，所述第一节点在选择出所述第一节点占用的第一时频资源之前，需要判定自身与能够进行频分复用的时隙上每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
所述第一节点确定出与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括以下两种方式：
一、所述第一节点根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
二、根据所述第一节点在能够进行频分复用的时隙上的每个所述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
该方式下，所述第一节点先根据接收功率判定所述第一节点与每个所述第二节点之间的路损信息，再根据所述第一节点与每个所述第二节点之间的路损信息，确定出所述第一节点与每个所述第二节点之间的空间隔离度，从而能够判定出是否满足频分复用条件。
可选的，为了降低时隙调整率，第一节点还可以结合该第一节点所属的车辆的车速信息/车道信息等，进行频分复用。具体为：
所述第一节点所属的车辆所在的车道与所有所述第二节点所属的车辆所在的车道为同向车道；和/或所述第一节点所属的车辆当前的车速大于或等于所有所述第二节点所属的车辆当前的车速。
所述第一节点选择出所述第一节点占用的时频资源之后，该方法还包括：
所述第一节点确定出所述第一节点与所述第二节点频分复用失败后，所述第一节点重新选择所述第一时频资源。
在实施中，所述第一节点确定出所述第一节点与所述第二节点频分复用失败，包括以下三种的实现方式：
方式A、所述第一节点通过测量第二时频资源上的接收功率，以确定所述第一节点与所述第二节点频分复用失败。
该方式进一步包括以下两种实现方式：
方式A1、所述第一节点确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源。若所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码失败，所述第一节点确定所述第一节点与所述第二节点频分复用失败。
举例说明，所述第一节点先通过底层检测接收功率，以确定是否存在与所述第一节点频分复用同一时隙的第二节点，在检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的第二功率阈值，确定存在与所述第一节点频分复用同一时隙的第二节点。
所述第一节点在确定出存在与所述第一节点频分复用同一时隙的第二节点后，再通过在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上是否能够解码成功，来判定频分复用是否成功。若所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上能够成功解码所述第二节点发送的信息，所述第一节点确定所述第一节点与所述第二节点频分复用失败。
方式A2、所述第一节点确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源。若所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，所述第一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，所述第一 节点确定所述第一节点与所述第二节点频分复用失败。
方式B、通过与所述第一节点和所述第二节点均不频分复用同一时隙的第三节点判定所述第一节点与所述第二节点是否频分复用失败，具体为：
所述第一节点根据接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
该方式下，所述第三节点在除所述自身占用的时频资源所在的时隙之外的其他时隙上，接收该其他时隙上的第一节点和第二节点发送的信息。
所述第三节点确定出解码失败所述第一节点和/或所述第二节点发送的信息，确定所述第一节点和所述第二节点频分复用失败，并向所述第一节点和/或所述第二节点发送用于指示所述第一节点和所述第二节点频分复用失败的通知信息。
方式C、该方式为上述方式A和方式B的合并，具体为：
所述第一节点通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，且接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，所述第一节点确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
该方式中，所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，包括：
若所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，所述第一节点确定所述第一节点与所述第二节点能够继续频分复用。
基于上述任一实施例，所述第一节点还会作为第三方节点来判定其他节 点的频分复用是否成功。具体如下：
所述第一节点在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息。
若所述第一节点确定出在所述其他时隙上对采用频分复用的至少两个节点中的至少一个节点发送的信息解码失败，所述第一节点确定所述至少两个节点频分复用失败，并向所述至少两个节点中的至少一个节点发送用于指示所述至少两个节点频分复用失败的通知信息。
本公开文本实施例还提供了频分复用方式下，节点发送FI消息和维护时隙状态表(向量)的原则。
节点发送的帧信息(Frame Information，FI)称为：FI消息，也可简称为FI。FI消息中指示的每个时隙对应的状况信息称为：FI消息中每个时隙对应的时隙信息域。FI消息中每个时隙对应的占用状况信息中给出的三类信息，即：时隙占用状态、资源临时标识(Source Temporary Identifier，STI)、优先级信息。它们相应的子域分别称为：每个时隙的时隙信息域中包含的时隙占用状态子域、STI子域、优先级子域。
FI消息发送时，通常当系统不确定绝对时间参考点情况下，FI消息中的第一个时隙信息域指示FI消息的发送时隙对应的时隙信息，第二个时隙信息域指示FI消息的发送时隙的前一个时隙对应的时隙信息，依次类推。当系统确定绝对时间参考点的情况下，FI消息中各时隙信息域可以按约定方式排列，如FI消息中第一个时隙信息域对应时隙0。
时隙对应的“检测域”是指占用该时隙发送的FI消息中该时隙对应的时隙信息域，“非检测域”是指非占用该时隙发送的FI中该时隙对应的时隙信息域。
需要说明的是，上述描述方式只是为了后续描述方便而规定，当然也可以采用其他的描述方式。
下面以车联网系统中的任一节点(即第一节点)为例进行说明。
一、第一节点发送FI消息的过程。
FI消息的内容以所述第一节点占用的主时频资源的所在的时隙的编号、或者以所述第一节点占用的第一时频资源组成的时隙资源集合为单位进行表 征，如使用该时隙资源集合中初传占用的第一时隙资源的编号表征该时隙资源集合。其中，所述第一节点占用的主时频资源为所述第一节点占用的任一第一时频资源，所述第一节点占用的辅时频资源为所述第一节点占用第一时频资源中除所述任一第一时频资源之外的其他第一时频资源。
FI消息的发送：在所述第一节点占用的任一第一时频资源上发送FI消息。
如果相互关联的话，即初传占用的第一时频资源和重传占用的第一时频资源采用固定样式(pattern)的方式，第一节点的位置是确定的，第一节点感知的FI信息也是确定的，这样FI消息可以只携带一个。即虽然业务消息是在所有第一时频资源上都发送，但可以只在其中的一个第一时频资源上发送FI消息，另外的第一时频资源上发送纯业务数据。
二、第一节点的时隙状态表(向量)的维护。
第一节点根据接收到的其他节点发送的FI消息进行映射，得到自身当前维护的时隙状态表(向量)，每个时隙状态表(向量)维护的是所有的时隙对应的时隙信息。第一节点将接收到的FI消息映射到真实的时隙上，并进行记录，以得到自身当前维护的时隙状态表(向量)。第一节点在需要发送FI消息时，根据自身当前所维护的时隙状态表(向量)进行映射，得到所需发送的FI消息。第一节点发送FI消息时。可以以时频资源为单位进行映射，也可以以时频资源集合为单位进行映射。
对初/重传的合并接收原则：对于其他节点的初/重传，第一节点任意成功接收一次，则确定自身成功接收到其他节点传输的数据(可以进一步考虑合并增益)，即无需特殊处理，只要成功接收一次就反馈成功，无论是在初传(如主时频资源)所在时隙上接收成功，还是在重传(如辅时频资源)所在时隙上接收成功。
下面通过三个具体实施例，对本公开文本实施例提供的一种数据传输方法进行说明。
实施例1：假设每个节点重传一次，即每个节点的传输包括一次初传和一次重传。系统预先配置的初/重传时频资源对如表1所示，X1表示一个初/重传时频资源对，X2表示一个初/重传时频资源对。
表1
  时隙1 时隙2 时隙3 时隙4 时隙5
子频带1 节点A 节点A X1 X1 X
子频带2 节点B X2 节点B X2 X
子频带3 X X X X X
表中，X表示空闲时频资源，空闲时频资源中有X1，X2两个初/重传时频资源对，都表示确定的时频资源对。
节点C在选择占用的时频资源时，若时隙占用率小于设定的阈值时，优先选择空闲时隙中的时频资源进行占用。若时隙占用率大于或等于设定的阈值时，采用频分复用方式占用时频资源，具体如下：
对于X1时频资源对，节点C需要确定节点B与自己的距离；对于X2时频资源对，节点C需要确定节点A与自己的距离。
假定节点C与节点A之间的空间隔离度小于或等于具有通信需求的节点间需满足的最大距离，与节点B之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，则节点C考虑与节点A进行频分复用，选择X2时频资源对。
实施例2：对初/重传的合并接收原则(包括频分复用的节点以及其他节点)。
针对已经频分复用的两个节点，节点A和节点B，各自占用的时频资源如表2所示。
表2
  时隙1 时隙2 时隙3 时隙4 时隙5
子频带1 节点A 节点A X1 X1 X
子频带2 节点B X2 节点B X2 X
子频带3 节点C X X X 节点C
(1)节点A，B，C频分复用同一时隙(即时隙1)，以节点A和节点B作为发送节点，节点C作为接收节点来例，节点C接收判定是否正确接收。
节点C通过底层测量，确定与自己频分复用的节点A和节点B是存在的，进一步确定节点A和节点B所占用的两个时频资源对应的时隙。
对于节点A，由于在时隙1上与节点C频分，只能在时隙2上接收节点A的信息，即节点C与节点A是部分频分节点。
对于节点B，由于在时隙1上与节点C频分，只能在时隙3上接收节点B的信息，即节点C与节点B是部分频分节点。
这里以节点C对节点B的接收为例进行说明。具体如表3所示：
表3
Figure PCTCN2016094361-appb-000001
(2)节点D对于节点A和节点C的信息的接收，即节点D与节点A和节点C都是非频分节点。节点A和节点C是类似的，这里以节点A为例来说明：
节点D需要判定节点A：1)是否发生频分失败；2)是否发生空间复用碰撞。
这两类时隙占用失败的判定与(1)中部分频分节点的判定原则是一致的，差别在于节点D对节点A的接收有多次机会，需要对结果进行合并处理。
上述方法处理流程可以用软件程序实现，该软件程序可以存储在存储介 质中，当存储的软件程序被调用时，执行上述方法步骤。
基于同一发明构思，本公开文本实施例中还提供了一种节点设备，由于该节点设备解决问题的原理与上述数据传输方法相似，因此该节点设备的实施可以参见方法的实施，重复之处不再赘述。
本公开文本实施例提供的一种节点设备，如图2所示，该设备包括：
处理模块21，用于从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述处理模块所属的第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度小于或等于具有通信需求的节点间需满足的最大距离；以及
收发模块22，用于在所述第一时频资源上，进行数据传输。
可选的，所述处理模块21具体用于：
在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
可选的，所述处理模块21还用于：
在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
可选的，所述处理模块21确定与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括：
根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；或者
根据所述第一节点在能够进行频分复用的时隙上的每个所述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定 出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
基于上述任一实施例，所述处理模块21还用于：
确定出所述第一节点与所述第二节点频分复用失败后，重新选择所述第一时频资源。
可选的，所述处理模块21具体用于：
若所述收发模块22接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点频分复用失败；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，且所述收发模块22接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
作为一种可选的实现方式，所述处理模块21具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码失败，确定所述第一节点与所述第二节点频分复用失败。
作为另一种可选的实现方式，所述处理模块21具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第 一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点频分复用失败。
可选的，所述处理模块21具体用于：
若检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点能够继续频分复用。
基于上述任一实施例，所述收发模块22还用于：在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息。
基于上述任一实施例，所述处理模块21还用于：确定出在所述其他时隙上对采用频分复用的至少两个节点中的至少一个节点发送的信息解码失败后，确定所述至少两个节点频分复用失败，并控制所述收发模块向所述至少两个节点中的至少一个节点发送用于指示所述任意两个节点频分复用失败的通知信息。
下面结合优选的硬件结构，对本公开文本实施例提供的节点设备的结构、处理方式进行说明。
在图3的实施例中，节点设备包括收发机31、以及与该收发机31连接的至少一个处理器32，其中：
所述处理器32，用于读取存储器33中的程序，执行下列过程：
从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述处理模块所属的第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度小于或等于具有通信需求的节点间需满足的最大距离；以及
所述收发机31，用于在处理器32的控制下在所述第一时频资源上，进行数据传输。
其中，在图3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32代表的一个或多个处理器和存储器33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31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34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32负责管理总线架构和通常的处理，存储器33可以存储处理器32在执行操作时所使用的数据。
可选的，所述处理器32具体用于：
在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
可选的，所述处理器32还用于：
在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
可选的，所述处理器32确定与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括：
根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；或者
根据所述第一节点在能够进行频分复用的时隙上的每个所述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
基于上述任一实施例，所述处理器32还用于：
确定出所述第一节点与所述第二节点频分复用失败后，重新选择所述第一时频资源。
可选的，所述处理器32具体用于：
若所述收发机31接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点频分复用失败；或者
通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，且所述收发机31接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
作为一种可选的实现方式，所述处理器32具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码失败，确定所述第一节点与所述第二节点频分复用失败。
作为另一种可选的实现方式，所述处理器32具体用于：
确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；
检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点频分复用失败。
可选的，所述处理器32具体用于：
若检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点能够继续频分复用。
基于上述任一实施例，所述收发机31还用于：在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息。
基于上述任一实施例，所述处理器32还用于：确定出在所述其他时隙上对采用频分复用的至少两个节点中的至少一个节点发送的信息解码失败后，确定所述至少两个节点频分复用失败，并控制所述收发模块向所述至少两个节点中的至少一个节点发送用于指示所述任意两个节点频分复用失败的通知信息。
本领域内的技术人员应明白，本公开文本的实施例可提供为方法、系统、或计算机程序产品。因此，本公开文本可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开文本可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开文本是参照根据本公开文本实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本公开文本的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本公开文本范围的所有变更和修改。
显然，本领域的技术人员可以对本公开文本进行各种改动和变型而不脱离本公开文本的精神和范围。这样，倘若本公开文本的这些修改和变型属于本公开文本权利要求及其等同技术的范围之内，则本公开文本也意图包含这些改动和变型在内。

Claims (21)

  1. 一种数据传输方法，包括：
    第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；以及
    所述第一节点在所述第一时频资源上，进行数据传输。
  2. 如权利要求1所述的方法，其中，所述第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，包括：
    所述第一节点在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
  3. 如权利要求2所述的方法，其特征在于，所述第一节点从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源，还包括：
    所述第一节点在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
  4. 如权利要求1所述的方法，其中，所述第一节点确定出与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括：
    所述第一节点根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；或者
    所述第一节点根据所述第一节点在能够进行频分复用的时隙上的每个所 述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
  5. 如权利要求1～4中任一项所述的方法，其中，所述第一节点选择出所述第一节点占用的时频资源之后，该方法还包括：
    所述第一节点确定出所述第一节点与所述第二节点频分复用失败后，所述第一节点重新选择所述第一时频资源。
  6. 如权利要求5所述的方法，其中，所述第一节点确定所述第一节点与所述第二节点频分复用失败，包括：
    所述第一节点接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同；或者
    所述第一节点通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点频分复用失败；或者
    所述第一节点通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，且接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，所述第一节点确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
  7. 如权利要求6所述的方法，其中，所述第一节点确定所述第一节点与所述第二节点频分复用失败，包括：
    所述第一节点确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
    所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发 送的信息解码失败，所述第一节点确定所述第一节点与所述第二节点频分复用失败。
  8. 如权利要求6所述的方法，其中，所述第一节点确定所述第一节点与所述第二节点频分复用失败，包括：
    所述第一节点确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
    所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，所述第一节点确定所述第一节点与所述第二节点频分复用失败。
  9. 如权利要求6所述的方法，其中，所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，包括：
    若所述第一节点检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，所述第一节点在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，所述第一节点确定所述第一节点与所述第二节点能够继续频分复用。
  10. 如权利要求1～9中任一项所述的方法，还包括：
    所述第一节点在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息；以及
    若所述第一节点确定出在所述其他时隙上对采用频分复用的至少两个节点中的至少一个节点发送的信息解码失败，所述第一节点确定所述至少两个节点频分复用失败，并向所述至少两个节点中的至少一个节点发送用于指示所述任意两个节点频分复用失败的通知信息。
  11. 一种节点设备，包括：
    处理模块，用于从能够进行频分复用的时隙上对于所述第一节点是空闲 的子频带对应的时频资源中，选择出所述处理模块所属的第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度小于或等于具有通信需求的节点间需满足的最大距离；以及
    收发模块，用于在所述第一时频资源上，进行数据传输。
  12. 如权利要求11所述的设备，其中，所述处理模块具体用于：
    在确定出已被占用的时隙与所有时隙的比例大于或等于设定的阈值后，从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述第一节点占用的第一时频资源。
  13. 如权利要求12所述的设备，其中，所述处理模块还用于：
    在确定出已被占用的时隙与所有时隙的比例小于所述阈值后，从空闲时隙对应的时频资源中，选择出所述第一节点占用的时频资源，其中，所述空闲时隙上的所有子频带对于所述第一节点都是空闲的。
  14. 如权利要求11所述的设备，其中，所述处理模块确定与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，包括：
    根据能够进行频分复用的时隙上的每个第二节点的位置信息，确定出所述第一节点与能够进行频分复用的时隙上的每个第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离；或者
    根据所述第一节点在能够进行频分复用的时隙上的每个所述第二节点占用的第二时频资源上的接收功率，确定出所述第一节点与能够进行频分复用的时隙上的每个所述第二节点之间的路损信息，并根据所述路损信息，确定出所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离。
  15. 如权利要求11～14中任一项所述的设备，其中，所述处理模块还用于：
    确定出所述第一节点与所述第二节点频分复用失败后，重新选择所述第一时频资源。
  16. 如权利要求15所述的设备，其中，所述处理模块具体用于：
    若所述收发模块接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同；或者
    通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点频分复用失败；或者
    通过功率测量，确定出所述第一节点确定所述第一节点与所述第二节点能够继续频分复用，且所述收发模块接收到的第三节点发送的用于指示所述第一节点与所述第二节点频分复用失败的通知信息，确定所述第一节点与所述第二节点频分复用失败，其中，所述第三节点占用的第三时频资源所在的时隙与所述第一时频资源所在的时隙和所述第二时频资源所在的时隙均不同。
  17. 如权利要求16所述的设备，其中，所述处理模块具体用于：
    确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及I
    检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，且在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码失败，确定所述第一节点与所述第二节点频分复用失败。
  18. 如权利要求16所述的设备，其中，所述处理模块具体用于：
    确定出与所述第一时频资源所在的时隙为不同时隙的第二时频资源；以及
    检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与至少一个所述第二节点之间的空间隔离度大于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点频分复用失败。
  19. 如权利要求16所述的设备，其中，所述处理模块具体用于：
    若检测出与所述第一时频资源所在的时隙为不同时隙的第二时频资源上的接收功率大于或等于设定的功率阈值，在与所述第一时频资源所在的时隙为不同时隙的第二时频资源上对所述第二节点发送的信息解码成功，且所述第一节点与所有所述第二节点之间的空间隔离度均小于或等于具有通信需求的节点间需满足的最大距离，确定所述第一节点与所述第二节点能够继续频分复用。
  20. 如权利要求11～19中任一项所述的设备，其中，所述收发模块还用于：在除所述第一时频资源所在的时隙之外的其他时隙上，接收其他节点发送的信息；并且
    所述处理模块还用于：确定出在所述其他时隙上对采用频分复用的至少两个节点中的至少一个节点发送的信息解码失败后，确定所述至少两个节点频分复用失败，并控制所述收发模块向所述至少两个节点中的至少一个节点发送用于指示所述任意两个节点频分复用失败的通知信息。
  21. 一种节点设备，包括：
    处理器；以及
    存储器，通过总线接口与所述处理器相连接，并且用于存储所述处理器在执行操作时所使用的程序和数据；
    收发机，用于在传输介质上与各种其他设备进行通信，
    当处理器调用并执行所述存储器中所存储的程序和数据时，所述节点设备执行如下处理：
    从能够进行频分复用的时隙上对于所述第一节点是空闲的子频带对应的时频资源中，选择出所述节点设备所处的第一节点占用的第一时频资源，其中，所述能够进行频分复用的时隙上除所述第一节点占用的时频资源之外的至少一个时频资源为第二节点占用的第二时频资源，所述第一节点与所述能够进行频分复用的时隙上所有所述第二节点之间的空间隔离度小于或等于具有通信需求的节点间需满足的最大距离；以及
    在所述第一时频资源上，进行数据传输。
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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN115004851B (zh) * 2022-04-29 2026-04-07 北京小米移动软件有限公司 一种确定资源的方法、装置及存储介质

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060234717A1 (en) * 2005-03-09 2006-10-19 Ngan-Cheung Pun Listening frequency and resource planning for cdma based ad-hoc networks
CN101056230A (zh) * 2006-04-14 2007-10-17 北京大学 多中心无线动态分布式网络信息防碰撞通信方法
US20080019315A1 (en) * 2006-07-18 2008-01-24 Fujitsu Limited Ad-hoc communication method and communication system between terminals
CN103841648A (zh) * 2014-03-07 2014-06-04 西南大学 一种分布式协作传输速率、发送功率和频谱分配的方法
CN103916929A (zh) * 2014-03-25 2014-07-09 中国电子科技集团公司第三十研究所 一种定向Ad Hoc网络邻居发现方法
CN104427617A (zh) * 2013-08-19 2015-03-18 电信科学技术研究院 一种资源指示及确定方法、装置
CN104918281A (zh) * 2014-03-10 2015-09-16 电信科学技术研究院 一种数据发送的方法及装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9025466B2 (en) * 2011-07-07 2015-05-05 Qualcomm Incorporated Methods and apparatus for facilitating channel access in a communication system
US9301306B2 (en) * 2013-05-28 2016-03-29 Honeywell International Inc. Self-organizing OFDMA system for broadband communication

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060234717A1 (en) * 2005-03-09 2006-10-19 Ngan-Cheung Pun Listening frequency and resource planning for cdma based ad-hoc networks
CN101056230A (zh) * 2006-04-14 2007-10-17 北京大学 多中心无线动态分布式网络信息防碰撞通信方法
US20080019315A1 (en) * 2006-07-18 2008-01-24 Fujitsu Limited Ad-hoc communication method and communication system between terminals
CN104427617A (zh) * 2013-08-19 2015-03-18 电信科学技术研究院 一种资源指示及确定方法、装置
CN103841648A (zh) * 2014-03-07 2014-06-04 西南大学 一种分布式协作传输速率、发送功率和频谱分配的方法
CN104918281A (zh) * 2014-03-10 2015-09-16 电信科学技术研究院 一种数据发送的方法及装置
CN103916929A (zh) * 2014-03-25 2014-07-09 中国电子科技集团公司第三十研究所 一种定向Ad Hoc网络邻居发现方法

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