WO2017173665A1 - 一种通信资源协调方法及装置 - Google Patents

一种通信资源协调方法及装置 Download PDF

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Publication number
WO2017173665A1
WO2017173665A1 PCT/CN2016/078896 CN2016078896W WO2017173665A1 WO 2017173665 A1 WO2017173665 A1 WO 2017173665A1 CN 2016078896 W CN2016078896 W CN 2016078896W WO 2017173665 A1 WO2017173665 A1 WO 2017173665A1
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Prior art keywords
communication resource
message
data packet
terminal
communication
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PCT/CN2016/078896
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English (en)
French (fr)
Inventor
陈光日
华尧
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华为技术有限公司
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Priority to CN201680084043.XA priority Critical patent/CN108886769B/zh
Priority to PCT/CN2016/078896 priority patent/WO2017173665A1/zh
Publication of WO2017173665A1 publication Critical patent/WO2017173665A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to communication technologies, and in particular, to a communication resource coordination method and apparatus.
  • V2V Vehicle to Vehicle
  • vehicles can obtain road condition information or receive information services in time.
  • the safety information such as the speed of the vehicle, the direction of travel, the specific position, and whether or not the emergency brake is stepped on are broadcasted to each other, so that the driver can better perceive the traffic situation outside the line of sight and prejudge the dangerous situation and then avoid it.
  • the vehicle transmits V2V information to the surrounding vehicles by means of broadcasting, and the transmission period is 1 to 10 Hz, and the size varies between 100 and 800 bytes.
  • LTE Long Term Evolution
  • the Device to Device (D2D) technology is used as an important feature in 3GPP LTE Release 12 and is standardized. It supports user terminals. Direct communication is allowed. Considering that the V2V communication scenario also belongs to terminal direct communication, the V2V service can be transmitted based on the D2D technology.
  • the D2D technology has a distributed transmission mode. In the distributed transmission mode, the communication resources are divided into one or more resource pools. When the user transmits data, a resource is randomly selected in the resource pool to send data.
  • the D2D distributed transmission mode employs a random transmission mechanism, there are cases where a plurality of neighboring users randomly select the same resource and transmit data, which will cause a transmission collision and cause a collision. And as user density increases, such collisions will become more apparent.
  • the service density is large. If the V2V information is transmitted using the D2D distributed transmission mode, the transmission resource conflict will be more serious, and more importantly, The sender of the information does not know whether there are other users who have resource conflicts with themselves. Therefore, even if the information is not sent successfully, no measures will be taken. This leads to continuous resource conflicts, affecting the reliability of information transmission and reducing the overall system. Security.
  • the present invention provides a communication resource coordination method and apparatus to solve the technical problem that a persistent collision may occur when each terminal selects a communication resource.
  • an embodiment of the present invention provides a communication resource coordination method, where the method is used to control a device, and the method includes:
  • the message is broadcasted to indicate that the communication resource has collided, so that the terminal that uses the communication resource selects another communication resource to perform data packet retransmission.
  • the terminal does not know whether the communication resource selected by the terminal conflicts with other terminals, and uses a control device such as a roadside unit to detect the resource conflict situation of each terminal and notify each terminal in time, so that the terminal can know whether the used resource is generated.
  • a control device such as a roadside unit to detect the resource conflict situation of each terminal and notify each terminal in time, so that the terminal can know whether the used resource is generated.
  • Conflicts and re-select resources when conflicts occur, and timely retransmission of data packets thus reducing the probability of recurring conflicts, effectively avoiding the occurrence of persistent conflicts, thereby enhancing the reliability of data packet transmission and improving system security.
  • the preset conditions include:
  • the duration that the RSRP is greater than the preset threshold has exceeded the first preset duration, and the data carried by the data packet using the communication resource cannot be demodulated.
  • the message is a dedicated indication message, or the message is generated by adding a bit to an existing message.
  • the dedicated indication message is sent by the control device once every P/2 duration, and the dedicated indication message is used to indicate communication resources that conflict in the past P/2 duration, each time
  • the communication resources are indicated by a first predetermined number of bits, and P is the maximum delay when the data packet is transmitted.
  • the message When the message is generated by adding a bit in an existing message, the message is a medium access control MAC message in which a second number of bits are added in the header, and the second number of bits is used. A communication resource that conflicts within a second preset time period.
  • the terminal is a vehicle
  • the control device is a base station or a roadside unit RSU
  • the data packet is safety information for ensuring driving safety.
  • an embodiment of the present invention provides a communication resource coordination method, the method being used for Terminal, the method includes:
  • the communication resources used by the terminal conflict, the communication resources are reselected for retransmission of the data packet.
  • the terminal does not know whether the communication resource selected by the terminal conflicts with other terminals, and uses a control device such as a roadside unit to detect the resource conflict situation of each terminal and notify each terminal in time, so that the terminal can know whether the used resource is generated.
  • a control device such as a roadside unit to detect the resource conflict situation of each terminal and notify each terminal in time, so that the terminal can know whether the used resource is generated.
  • Conflicts and re-select resources when conflicts occur, and timely retransmission of data packets thus reducing the probability of recurring conflicts, effectively avoiding the occurrence of persistent conflicts, thereby enhancing the reliability of data packet transmission and improving system security.
  • the reselecting communication resources includes:
  • the designated communication resource is selected to perform retransmission of the data packet, and the designated communication resource is the communication resource of the idle communication resource that is closest to the conflicting communication resource.
  • the method further includes:
  • the detected communication resource with the smallest RSRP is taken as the designated communication resource.
  • the method further includes:
  • the contradiction is processed using a preset policy.
  • the terminal is a vehicle
  • the control device is a base station or a roadside unit RSU
  • the data packet is a security message for ensuring driving safety.
  • an embodiment of the present invention provides a communication resource coordination apparatus, where the apparatus is used to control a device, and the apparatus includes:
  • a power acquisition unit configured to acquire a reference signal received power RSRP of a communication resource used by the received data packet
  • a power determining unit configured to determine whether the RSRP acquired by the power acquiring unit meets a preset condition
  • a message sending unit configured to: when the power determining unit determines that the RSRP meets a preset condition, broadcast a message, where the message is used to indicate that the communication resource has collided, so that the terminal that uses the communication resource selects Other communication resources are used for packet retransmission.
  • the preset conditions include:
  • the duration that the RSRP is greater than the preset threshold has exceeded the first preset duration, and the data carried by the data packet using the communication resource cannot be demodulated.
  • the message is a dedicated indication message, or the message is generated by adding a bit to an existing message.
  • the dedicated indication message is sent by the control device once every P/2 duration, and the dedicated indication message is used to indicate communication resources that conflict in the past P/2 duration, each time
  • the communication resources are indicated by a first predetermined number of bits, and P is the maximum delay when the data packet is transmitted.
  • the message When the message is generated by adding a bit in an existing message, the message is a medium access control MAC message in which a second number of bits are added in the header, and the second number of bits is used. A communication resource that conflicts within a second preset time period.
  • the terminal is a vehicle
  • the control device is a base station or a roadside unit RSU
  • the data packet is safety information for ensuring driving safety.
  • an embodiment of the present invention provides a communication resource coordination apparatus, where the apparatus is used for a terminal, and the apparatus includes:
  • a message receiving unit configured to receive a message, where the message is used to indicate a conflicting communication resource
  • a conflict judging unit configured to determine, according to the message received by the message receiving unit, whether a communication resource used by the terminal conflicts
  • a resource reselecting unit configured to reselect the communication resource to perform retransmission of the data packet when the conflict determining unit determines that the communication resource used by the terminal conflicts.
  • the reselecting communication resources includes:
  • the designated communication resource is selected to perform retransmission of the data packet, and the designated communication resource is the communication resource of the idle communication resource that is closest to the conflicting communication resource.
  • the resource reselection unit is also used to:
  • the detected communication resource with the smallest RSRP is taken as the designated communication resource.
  • the device further includes:
  • a contradiction processing unit configured to process the contradiction using a preset policy when the message receiving unit receives at least two of the messages, and the at least two of the messages have contradictory indications of conflicting communication resources .
  • the terminal is a vehicle
  • the control device is a base station or a roadside unit RSU
  • the data packet is a secure message for ensuring driving safety.
  • an embodiment of the present invention provides a control device, including:
  • At least one processor configured to acquire a reference signal received power RSRP of the communication resource used by the received data packet, determine whether the RSRP meets a preset condition, and if the RSRP meets a preset condition, use a transmitter to broadcast externally a message, the message is used to indicate that the communication resource has collided, so that the terminal that uses the communication resource selects another communication resource to perform data packet retransmission;
  • a transmitter for broadcasting the message to the outside A transmitter for broadcasting the message to the outside.
  • an embodiment of the present invention provides a terminal, including:
  • a receiver configured to receive a message, where the message is used to indicate a conflicting communication resource
  • At least one processor configured to determine, according to the message, whether a communication resource used by the terminal conflicts, and if the communication resource used by the terminal conflicts, reselect the communication resource to perform retransmission of the data packet;
  • a transmitter for retransmitting the data packet using the reselected communication resource.
  • an embodiment of the present invention provides a communication system including the above terminal and the above control device.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in the terminal, including a program designed to perform the above aspects.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in the terminal, including a program designed to perform the above aspects.
  • the terminal does not know whether the communication resource selected by the terminal conflicts with other terminals, and uses a control device such as a roadside unit to detect the resource conflict situation of each terminal and notify the terminal in time.
  • the terminal can know whether the used resources have conflicts and reselect the resources when the conflict occurs, and retransmit the data packets in time, thereby reducing the probability of recurring conflicts, effectively avoiding the occurrence of persistent conflicts, and thereby enhancing the reliability of data packet transmission. It also improves system security.
  • FIG. 1 is a schematic diagram of a possible application scenario of the present invention
  • FIG. 2 is a schematic diagram of a possible application scenario of the present invention.
  • FIG. 3 is a flowchart of a communication resource coordination method according to an exemplary embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a possible application scenario of the present invention.
  • FIG. 5 is a schematic diagram of a possible application scenario of the present invention.
  • FIG. 6 is a schematic structural diagram of a message according to an exemplary embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a message according to an exemplary embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a message according to an exemplary embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a message according to an exemplary embodiment of the present invention.
  • FIG. 10 is a flowchart of a communication resource coordination method according to an exemplary embodiment of the present invention.
  • FIG. 11 is a signaling diagram of a communication resource coordination method according to an exemplary embodiment of the present invention.
  • FIG. 12 is a schematic diagram of a communication resource coordination apparatus according to an exemplary embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a communication resource coordination apparatus according to an exemplary embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a UE according to an exemplary embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a base station according to an exemplary embodiment of the present invention.
  • the user equipment UE may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, and various forms.
  • User Equipment UE
  • MS Mobile Station
  • Terminal Terminal Equipment
  • the devices mentioned above may be collectively referred to as users.
  • Device or UE or terminal the present invention is mainly exemplified by a UE/terminal as a vehicle.
  • a base station (BS) is a device deployed in a radio access network to provide a wireless communication function for a UE.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like.
  • the name of a device having a base station function may be different.
  • an evolved Node B evolved Node B: eNB or eNodeB
  • Node B In the 3G network, it is called Node B and so on.
  • the above-mentioned devices for providing wireless communication functions to the UE are collectively referred to as a base station or a BS.
  • each terminal selects a communication resource
  • two or more terminals may select the same communication resource, thereby generating a collision or collision (collision/collision) in resource occupation, which is in the present invention.
  • a phenomenon can be referred to as a conflict or a resource conflict.
  • control device is a device that plans or coordinates communication resources used by the terminal in order to avoid resource conflicts.
  • control device may be a base station, or an RSU (Road Side Unit), or the like.
  • the techniques described in this disclosure may be applicable to LTE systems, or other wireless communication systems employing various radio access technologies, such as using code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, single carrier.
  • a system of access technologies such as frequency division multiple access.
  • it can also be applied to the subsequent evolution system using the LTE system, such as the fifth generation 5G system and the like.
  • the LTE system is taken as an example here.
  • the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is used as the radio access network
  • the Evolved Packet Core, EPC for short) is used as the core network.
  • the UE accesses the IMS network through the E-UTRAN and the EPC.
  • FIG. 1 is a schematic diagram of a scene in the present invention.
  • 101 to 103 are vehicles, and each vehicle can communicate directly with each other.
  • each vehicle can transmit and receive security including vehicle speed, driving direction, specific position, and whether emergency braking is stepped on. Information to better ensure driving safety.
  • Such communication between vehicles may be referred to as V2V (Vehicle to Vehicle), and may be implemented by way of example based on D2D technology in LTE.
  • a control device 104 may also be present.
  • the control device 104 may be a base station or an RSU (Road Side Unit).
  • the RSU may be a UE-type RSU (UE-Type RSU) or a base station-type RSU, and the present invention is not limited thereto.
  • the D2D distributed transmission mode uses a random transmission mechanism, there may be multiple The case where the vehicle randomly selects the same resource and transmits the data, which will cause a conflict with the resource occupation.
  • the vehicle 101 and the vehicle 103 select the same resource block for message transmission, and thus a collision occurs, but the vehicles 101 and 103 do not know that a conflict has occurred between them. That is, no countermeasures will be taken. As a result, resource conflicts will continue, affecting the reliability of information transmission and reducing the security of the entire system.
  • FIG. 3 is a flowchart of a communication resource coordination method according to an exemplary embodiment of the present invention. This method can be used to control devices such as base stations or RSUs.
  • the method may include the following steps:
  • Step S301 Acquire a reference signal received power RSRP of a communication resource used by the received data packet.
  • each car can broadcast a data packet containing the speed, direction of travel, specific location, whether or not the emergency brake is stepped on, that is, safety information, and the RSU can receive the security broadcast by each vehicle.
  • the information can detect the RSRP of the relevant communication resource.
  • the roadside unit 104 receives the security information broadcasted by each vehicle, and can detect the RSRP value of each related communication resource.
  • Step S302 determining whether the RSRP meets a preset condition.
  • the specific content of the preset condition is not limited in this embodiment, and those skilled in the art can design according to different scenarios or needs.
  • the preset condition may include:
  • the duration that the RSRP is greater than the preset threshold has exceeded the first preset duration, and the data carried by the data packet using the communication resource cannot be demodulated.
  • the UE-Type RSU can determine whether each communication resource has a collision based on RSRP power detection.
  • SA Service
  • a packet transmission is found on a certain communication resource, and the RSRP of the resource is greater than a certain power threshold, and the threshold is exceeded for a period of time, but the data of the resource location cannot be demodulated. It indicates that the probability of resource collision is large, and it can be inferred that at least two terminals select the same resource for data transmission, resulting in resource conflict.
  • the above power thresholds used by the RSU and the time exceeding the threshold may be self-preconfigured.
  • the power threshold used and the time exceeding the threshold may also be the upper level (such as the base station type RSU) configured for the UE-Type RSU using dedicated signaling.
  • Step S303 If the RSRP meets the preset condition, the message is broadcasted to indicate that the communication resource has collided, so that the terminal that uses the communication resource selects another communication resource to perform data packet retransmission.
  • the conflicting resource is broadcasted through the message, and each vehicle can receive the message according to the The message determines whether the communication resource used by the user encounters a resource conflict and takes countermeasures.
  • the message may be a dedicated indication message, or the message may also be generated by adding a bit to an existing message.
  • the conflict condition can be notified in two ways, one is through a dedicated conflict indication packet, that is, the dedicated indication message, and the other is through the MAC (Medium Access Control, medium access control).
  • the bit information is added to the header to indicate the collision situation.
  • the dedicated indication message is sent by the control device once every P/2 duration, and the dedicated indication message is used to indicate communication resources that conflict in the past P/2 duration, each time
  • the communication resources are indicated by a first predetermined number of bits, and P is the maximum delay when the data packet is transmitted.
  • each resource location can be represented by 8 bits, with each resource location being identified in turn by frequency and time.
  • FIG. 7 an example of a dedicated indication message, that is, a collision indication packet, is shown in FIG. 7.
  • the data packet in addition to occupying a 24-bit source identifier (Source ID) and in addition to the 16-bit destination ID (Target ID), the data packet also includes a payload for indicating a conflicting communication resource, and the payload may include a number of bits.
  • the first portion of the payload indicates a conflicting resource location
  • the second portion indicates another conflicting resource location
  • the message When the message is generated by adding a bit in an existing message, the message is a medium access control MAC message in which a second number of bits are added in the header, and the second number of bits is used. A communication resource that conflicts within a second preset time period.
  • 16 bits can be added to the MAC header to indicate whether a resource conflict has occurred in the past 5 ms.
  • FIG. 8 and FIG. 9 shown in FIG. 8 is a modified MAC sub-header format, and the V2V MAC sub-header is used to indicate a conflict situation.
  • Figure 9 there are a total of 15 resources, which can be indicated by 16 bits, where a bit with a value of 1 represents a conflict with the corresponding resource.
  • the terminal does not know whether the communication resource selected by the terminal and other terminals are sent.
  • the conflicting problem is to use the control device such as the roadside unit to detect the resource conflicts of each terminal and notify each terminal in time, so that the terminal can know whether the used resources have conflicts and reselect the resources when the conflict occurs, and timely perform the data packet.
  • the retransmission which reduces the probability of recurring conflicts, effectively avoids the occurrence of persistent conflicts, thereby enhancing the reliability of data packet transmission and improving system security.
  • FIG. 10 is a flowchart of a communication resource coordination method according to an exemplary embodiment of the present invention. This method can be used for terminals such as vehicles and the like.
  • the method may include the following steps:
  • Step S1001 Receive a message, where the message is used to indicate a communication resource in which a collision occurs.
  • Step S1002 Determine, according to the message, whether a communication resource used by the terminal conflicts.
  • Step S1003 If the communication resources used by the terminal conflict, reselect the communication resources to perform retransmission of the data packet.
  • the embodiment does not limit the specifics of how to reselect the communication resources, and those skilled in the art can design according to different scenarios or needs. For example, a reselection can be randomly performed among the optional resources.
  • the reselecting the communication resource may include:
  • the designated communication resource is selected to perform retransmission of the data packet, and the designated communication resource is the communication resource of the idle communication resource that is closest to the conflicting communication resource.
  • the communication resources occupied by the terminal when the data packet is transmitted in the Nth subframe (one subframe corresponds to 1 ms) in one transmission period conflicts, the communication resources are selected from the idle communication resources in the remaining PN time of the period.
  • the communication resource of the most conflicting communication resource performs retransmission of the data packet, where P is the maximum delay (in ms) of the data packet transmission, that is, the length of the transmission period.
  • the detected communication resource with the smallest RSRP is taken as the designated communication resource.
  • a communication resource having the smallest RSRP detected in the previous transmission period may be used as the designated communication resource.
  • the contradiction is processed using a preset policy.
  • a message indicates that the communication resource selected by the host has collided (indicated by 1), and another message indicates that the communication resource selected by the host vehicle does not collide (indicated by 0), and the two messages are in conflict.
  • you can use the "or" preset policy to process, and also the Boolean operation of the two instructions "or" (1 or 0 1).
  • the preset strategy can be: as long as there is a message indicating a certain If there is a conflict in the communication resources, it is determined that there is a conflict in the communication resources.
  • the terminal does not know whether the communication resource selected by the terminal conflicts with other terminals, and uses a control device such as a roadside unit to detect the resource conflict situation of each terminal and notify the terminal in time to make the terminal It can be known whether the resources used conflict and re-select resources when conflicts occur, and retransmit the data packets in time, thus reducing the probability of recurring conflicts, effectively avoiding the occurrence of persistent conflicts, and thus enhancing the reliability of data packet transmission. It also improves system security.
  • a control device such as a roadside unit
  • FIG. 11 is a signaling diagram of a communication resource coordination method according to an exemplary embodiment of the present invention.
  • U1, U2, ... Un are all vehicles, in addition to the RSU.
  • step S1101 the RSU broadcasts pre-configuration information to each vehicle in the coverage area through the PSBCH channel.
  • the pre-configuration information may include transmission resources allocated by the RSU, and the like.
  • step S1102 Un sends a data packet (such as a MAC PDU) to the outside by using the communication resource selected by itself, and is received by the RSU.
  • a data packet such as a MAC PDU
  • the PDU is a Protocol Data Unit, which is a protocol data unit.
  • step S1103 U2 sends a data packet (such as a MAC PDU) to the outside by using the communication resource selected by itself, and is received by the RSU.
  • a data packet such as a MAC PDU
  • step S1104 U1 sends a data packet (such as a MAC PDU) to the outside by using the communication resource selected by itself, and is received by the RSU.
  • a data packet such as a MAC PDU
  • step S1105 the RSU detects that a packet is generated on a certain communication resource by detecting a data packet transmitted by each vehicle.
  • step S1106 the RSU notifies each vehicle by a dedicated indication message that the communication resource is in conflict.
  • step S1107 each vehicle checks whether there is a conflict in the communication resources used by itself.
  • step S1108 U1 finds that the communication resource used by itself has a conflict, and then performs backoff, that is, reselects other communication resources, and transmits the data packet by using the reselected communication resource.
  • the terminal does not know whether the communication resource selected by the terminal conflicts with other terminals, and uses a control device such as a roadside unit to detect a resource conflict condition of each terminal. Timely notification to each terminal, so that the terminal can know whether the used resources have conflicts and re-select resources when conflict occurs, and retransmit the data packets in time, thus reducing the probability of recurring conflicts, effectively avoiding the occurrence of persistent conflicts, and thus enhancing The reliability of packet transmission also improves system security.
  • a control device such as a roadside unit
  • FIG. 12 is a schematic diagram of a communication resource coordination apparatus according to an exemplary embodiment of the present invention.
  • the apparatus may be used to control a device, and the apparatus may include:
  • a power acquisition unit 1201 configured to acquire a reference signal received power RSRP of a communication resource used by the received data packet;
  • the power determining unit 1202 is configured to determine whether the RSRP acquired by the power acquiring unit 1201 meets a preset condition
  • the message sending unit 1203 is configured to: when the power determining unit 1202 determines that the RSRP meets a preset condition, broadcast a message, where the message is used to indicate that the communication resource has collided, so that the communication resource is used.
  • the terminal selects other communication resources for data packet retransmission.
  • the preset condition includes:
  • the duration that the RSRP is greater than the preset threshold has exceeded the first preset duration, and the data carried by the data packet using the communication resource cannot be demodulated.
  • the message is a dedicated indication message, or the message is generated by adding a bit to an existing message.
  • the dedicated indication message is sent by the control device once every P/2 duration, and the dedicated indication message is used to indicate communication resources that conflict in the past P/2 duration, each time
  • the communication resources are indicated by a first predetermined number of bits, and P is the maximum delay when the data packet is transmitted.
  • the message When the message is generated by adding a bit in an existing message, the message is a medium access control MAC message in which a second number of bits are added in the header, and the second number of bits is used. A communication resource that conflicts within a second preset time period.
  • FIG. 13 is a schematic diagram of a communication resource coordination apparatus according to an exemplary embodiment of the present invention.
  • the apparatus may be used in a terminal, and the apparatus may include:
  • the message receiving unit 1301 is configured to receive a message, where the message is used to indicate a conflicting communication resource;
  • the conflict determining unit 1302 is configured to determine, according to the message received by the message receiving unit 1301, whether a communication resource used by the terminal conflicts;
  • a resource reselecting unit 1303, configured to: when the conflict determining unit 1302 determines that the terminal uses When the communication resources collide, the communication resources are reselected for retransmission of the data packets.
  • the reselecting the communication resource includes:
  • the designated communication resource is selected to perform retransmission of the data packet, and the designated communication resource is the communication resource of the idle communication resource that is closest to the conflicting communication resource.
  • the resource reselecting unit is further configured to:
  • the detected communication resource with the smallest RSRP is taken as the designated communication resource.
  • the device further includes:
  • a contradiction processing unit configured to process the contradiction using a preset policy when the message receiving unit receives at least two of the messages, and the at least two of the messages have contradictory indications of conflicting communication resources .
  • Fig. 14 shows a simplified schematic diagram of one possible design structure of the UE involved in the above embodiment.
  • the UE may include, for example, a transmitter 1401, a receiver 1402, a controller/processor 1403, a memory 1404, and a modem processor 1405.
  • Transmitter 1401 conditions (eg, analog transforms, filters, amplifies, and upconverts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to a base station or the like.
  • the antenna receives a downlink signal transmitted by a base station or the like.
  • Receiver 1402 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples.
  • encoder 1406 receives the traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, codes, and interleaves) the traffic data and signaling messages.
  • Modulator 1407 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples.
  • Demodulator 1409 processes (e.g., demodulates) the input samples and provides symbol estimates.
  • the decoder 1408 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the UE.
  • Encoder 1406, modulator 1407, demodulator 1409, and decoder 1408 may be implemented by a composite modem processor 1405. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems).
  • the controller/processor 1403 performs control management on the actions of the UE for performing the processing performed by the UE in the above embodiment. For example, it is used to control the UE to receive a message, determine whether the communication resources used by the UE conflict according to the message, and/or other processes of the techniques described in the present invention. As an example, the controller/processor 1403 is configured to support the UE in performing the method illustrated in FIG.
  • the memory 1404 is used to store program codes, data, and the like for the UE.
  • FIG. 15 is a schematic diagram showing a possible structure of a base station involved in the above embodiment.
  • the base station includes a transmitter/receiver 1501, a controller/processor 1502, a memory 1503, and a communication unit 1504.
  • the transmitter/receiver 1501 is configured to support the base station to transmit and receive information with the UE in the foregoing embodiment, and to support radio communication between the UE and other UEs.
  • the controller/processor 1502 performs various functions for communicating with the UE.
  • On the uplink the uplink signal from the UE is received via the antenna, coordinated by the receiver 1501, and further processed by the controller/processor 1152 to recover the service data and signaling information transmitted by the UE.
  • traffic data and signaling messages are processed by controller/processor 1502 and mediated by transmitter 1501 to generate downlink signals for transmission to the UE via the antenna.
  • Controller/processor 1502 also performs the methods of FIG. 3 and/or other processes for the techniques described herein. For example, a reference signal reception power RSRP for acquiring a communication resource used by the received data packet, and the like.
  • the memory 1503 is used to store program codes and data of the base station.
  • the communication unit 1504 is configured to support the base station to communicate with other network entities.
  • Figure 15 only shows a simplified design of the base station.
  • the base station may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the present invention are within the scope of the present invention.
  • the controller/processor for performing the above-described base station and UE functions of the present invention may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a field programmable gate array ( FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware, or may be implemented by a processor executing software instructions.
  • the software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the user equipment.
  • the processor and the storage medium may also reside as discrete components in the user equipment.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本发明实施例提供了一种通信资源协调方法及装置，当其中的方法用于控制设备时，包括：获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP；判断所述RSRP是否满足预设条件；如果所述RSRP满足预设条件，则对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传。针对终端不知晓自身所选择的通信资源与其他终端是否发生冲突的问题，使用路边单元等控制设备对各终端的资源冲突情况进行检测并及时通知给各终端，使终端可以获知所用资源是否产生冲突并在产生冲突时重新选择资源，及时进行数据包的重传，这样降低了再次冲突的概率，有效避免了持续冲突的产生。

Description

一种通信资源协调方法及装置 技术领域
本发明涉及通讯技术，尤其涉及一种通信资源协调方法及装置。
背景技术
随着时代的发展，人身安全、交通出行效率、环境保护以及经济效应等多方面因素促使构建一套完善的智能交通系统(Intelligent Transportation System，ITS)逐渐成为全球关注的热点。在ITS中，用于车辆与车辆之间通信的V2V(Vehicle to Vehicle，车辆对车辆)技术是关键技术之一，通过V2V，车辆可以及时获取路况信息或接收信息服务，例如车辆之间可以将自身的车速、行驶方向、具体位置、是否踩了紧急刹车等安全信息进行相互广播，从而使驾驶员可以更好的感知视距外的交通状况，对危险状况提前预判进而作出避让。车辆通过广播的方式向周围车辆发送V2V信息，发送周期为1～10Hz，大小约在100～800字节之间变化。
LTE(Long Term Evolution，长期演进)是目前主流的无线通信技术，其中D2D(Device to Device，设备到设备)技术在3GPP LTE Release 12中被作为重要特性且进行了标准化工作，其支持用户终端之间进行直连通信。考虑到V2V通信场景也属于终端直连通信，因此可以基于D2D技术来传输V2V业务。D2D技术存在分布式的传输模式，在分布式传输模式下，通信资源被划分为一个或多个资源池，用户传输数据时要在资源池内随机选择一块资源发送数据。
然而，由于D2D分布式的传输模式采用的是随机发送机制，因此存在多个邻近用户随机选择了相同的资源并发送数据的情况，这将引起传输碰撞，导致冲突。并且随着用户密度的增加，这种碰撞将越发明显。在车联网中，由于车辆在行驶过程中都需要频繁发送V2V信息，因此业务密度较大，如果使用D2D分布式的传输模式发送V2V信息会出现传输资源冲突较为严重的问题，而更重要的是，信息发送方并不知晓是否有其他用户与自身发生了资源冲突，故即使信息发送不成功也不会采取任何措施，这就导致资源冲突持续，影响了信息传输的可靠性，降低了整个系统的安全性。
发明内容
为克服现有技术中存在的问题，本发明提供一种通信资源协调方法及装置，以解决各终端选择通信资源时可能会产生持续冲突的技术问题。
一方面，本发明的实施例提供了一种通信资源协调方法，所述方法用于控制设备，所述方法包括：
获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP；
判断所述RSRP是否满足预设条件；
如果所述RSRP满足预设条件，则对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传。
针对终端不知晓自身所选择的通信资源与其他终端是否发生冲突的问题，使用路边单元等控制设备对各终端的资源冲突情况进行检测并及时通知给各终端，使终端可以获知所用资源是否产生冲突并在产生冲突时重新选择资源，及时进行数据包的重传，这样降低了再次冲突的概率，有效避免了持续冲突的产生，进而增强了数据包传输的可靠性，也提升了系统安全性。
在一个可能的设计中，所述预设条件包括：
所述RSRP大于预设门限的持续时间已超过第一预设时长，并且，无法解调出使用所述通信资源的数据包所携带的数据。
在一个可能的设计中，所述消息为专用指示消息，或者，所述消息通过在已有消息中增加比特位来生成。
在一个可能的设计中：
当所述消息为专用指示消息时，所述专用指示消息每隔P/2时长由所述控制设备发送一次，所述专用指示消息用于指示过去P/2时长内发生冲突的通信资源，每个通信资源用第一预设数量的比特位指示，P为所述数据包发送时的最大时延。
在一个可能的设计中：
当所述消息通过在已有消息中增加比特位来生成时，所述消息为在消息头中增加了第二数量的比特位的媒质接入控制MAC消息，所述第二数量的比特位用于指示最近的第二预设时长内发生冲突的通信资源。
在一个可能的设计中，所述终端为车辆，所述控制设备为基站或路边单元RSU，所述数据包为用于确保行车安全的安全信息。
另一方面，本发明的实施例提供了一种通信资源协调方法，所述方法用于 终端，所述方法包括：
接收消息，所述消息用于指示发生冲突的通信资源；
根据所述消息，判断所述终端所使用的通信资源是否发生冲突；
如果所述终端所使用的通信资源发生冲突，则重新选择通信资源以进行数据包的重传。
针对终端不知晓自身所选择的通信资源与其他终端是否发生冲突的问题，使用路边单元等控制设备对各终端的资源冲突情况进行检测并及时通知给各终端，使终端可以获知所用资源是否产生冲突并在产生冲突时重新选择资源，及时进行数据包的重传，这样降低了再次冲突的概率，有效避免了持续冲突的产生，进而增强了数据包传输的可靠性，也提升了系统安全性。
在一个可能的设计中，所述重新选择通信资源，包括：
在当前发送周期的剩余时间内，选择指定通信资源进行数据包的重传，所述指定通信资源为空闲通信资源中与发生冲突的通信资源最邻近的通信资源。
在一个可能的设计中，所述方法还包括：
如果没有空闲通信资源可用，则将检测到的RSRP最小的通信资源作为所述指定通信资源。
这样就意味着选择了一个距离本车辆最远的车辆所预留的资源进行复用，从而尽可能的避免较近的车辆的干扰。
在一个可能的设计中，所述方法还包括：
当接收到至少两个所述消息，且所述至少两个所述消息对发生冲突的通信资源的指示存在矛盾时，使用预设策略处理所述矛盾。
在一个可能的设计中，所述终端为车辆，所述控制设备为基站或路边单元RSU，所述数据包为用于确保行车安全的安全消息。
又一方面，本发明的实施例提供了一种通信资源协调装置，所述装置用于控制设备，所述装置包括：
功率获取单元，用于获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP；
功率判断单元，用于判断所述功率获取单元获取的RSRP是否满足预设条件；
消息发送单元，用于当所述功率判断单元判断所述RSRP满足预设条件时，对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传。
在一个可能的设计中，所述预设条件包括：
所述RSRP大于预设门限的持续时间已超过第一预设时长，并且，无法解调出使用所述通信资源的数据包所携带的数据。
在一个可能的设计中，所述消息为专用指示消息，或者，所述消息通过在已有消息中增加比特位来生成。
在一个可能的设计中：
当所述消息为专用指示消息时，所述专用指示消息每隔P/2时长由所述控制设备发送一次，所述专用指示消息用于指示过去P/2时长内发生冲突的通信资源，每个通信资源用第一预设数量的比特位指示，P为所述数据包发送时的最大时延。
在一个可能的设计中：
当所述消息通过在已有消息中增加比特位来生成时，所述消息为在消息头中增加了第二数量的比特位的媒质接入控制MAC消息，所述第二数量的比特位用于指示最近的第二预设时长内发生冲突的通信资源。
在一个可能的设计中，所述终端为车辆，所述控制设备为基站或路边单元RSU，所述数据包为用于确保行车安全的安全信息。
再一方面，本发明的实施例提供了一种通信资源协调装置，所述装置用于终端，所述装置包括：
消息接收单元，用于接收消息，所述消息用于指示发生冲突的通信资源；
冲突判断单元，用于根据所述消息接收单元接收的消息，判断所述终端所使用的通信资源是否发生冲突；
资源重选单元，用于当所述冲突判断单元确定所述终端所使用的通信资源发生冲突时，重新选择通信资源以进行数据包的重传。
在一个可能的设计中，所述重新选择通信资源，包括：
在当前发送周期的剩余时间内，选择指定通信资源进行数据包的重传，所述指定通信资源为空闲通信资源中与发生冲突的通信资源最邻近的通信资源。
在一个可能的设计中，所述资源重选单元还用于：
如果没有空闲通信资源可用，则将检测到的RSRP最小的通信资源作为所述指定通信资源。
在一个可能的设计中，所述装置还包括：
矛盾处理单元，用于当所述消息接收单元接收到至少两个所述消息，且所述至少两个所述消息对发生冲突的通信资源的指示存在矛盾时，使用预设策略处理所述矛盾。
在一个可能的设计中，所述终端为车辆，所述控制设备为基站或路边单元 RSU，所述数据包为用于确保行车安全的安全消息。
再一方面，本发明的实施例提供了一种控制设备，包括：
接收器，用于接收数据包；
至少一个处理器，用于获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP，判断所述RSRP是否满足预设条件，如果所述RSRP满足预设条件，则使用发射器对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传；
发射器，用于对外广播所述消息。
再一方面，本发明的实施例提供了一种终端，包括：
接收器，用于接收消息，所述消息用于指示发生冲突的通信资源；
至少一个处理器，用于根据所述消息判断所述终端所使用的通信资源是否发生冲突，如果所述终端所使用的通信资源发生冲突，则重新选择通信资源以进行数据包的重传；
发射器，用于使用所述重新选择的通信资源进行数据包的重传。
再一方面，本发明的实施例提供了一种通信系统，所述系统包括上述终端和上述控制设备。
再一方面，本发明实施例提供了一种计算机存储介质，用于储存为上述终端所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
再一方面，本发明实施例提供了一种计算机存储介质，用于储存为上述终端所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
本发明的实施例提供的技术方案可以包括以下有益效果：
在本发明实施例中，针对终端不知晓自身所选择的通信资源与其他终端是否发生冲突的问题，使用路边单元等控制设备对各终端的资源冲突情况进行检测并及时通知给各终端，使终端可以获知所用资源是否产生冲突并在产生冲突时重新选择资源，及时进行数据包的重传，这样降低了再次冲突的概率，有效避免了持续冲突的产生，进而增强了数据包传输的可靠性，也提升了系统安全性。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本发明。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本发明的实施例，并与说明书一起用于解释本发明的原理。
图1是本发明的一种可能的应用场景示意图；
图2是本发明的一种可能的应用场景示意图；
图3是根据本发明一示例性实施例示出的一种通信资源协调方法的流程图；
图4是本发明的一种可能的应用场景示意图；
图5是本发明的一种可能的应用场景示意图；
图6是根据本发明一示例性实施例示出的消息结构示意图；
图7是根据本发明一示例性实施例示出的消息结构示意图；
图8是根据本发明一示例性实施例示出的消息结构示意图；
图9是根据本发明一示例性实施例示出的消息结构示意图；
图10是根据本发明一示例性实施例示出的一种通信资源协调方法的流程图；
图11是根据本发明一示例性实施例示出的一种通信资源协调方法的信令图；
图12是根据本发明一示例性实施例示出的一种通信资源协调装置的示意图；
图13是根据本发明一示例性实施例示出的一种通信资源协调装置的示意图；
图14是根据本发明一示例性实施例示出的一种UE结构示意图；
图15是根据本发明一示例性实施例示出的一种基站结构示意图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本发明的一些方面相一致的装置和方法的例子。
本发明所涉及到的用户设备UE(或者说是终端)可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备,以及各种形式的用户设备(User Equipment,简称UE),移动台(Mobile station,简称MS)，终端(terminal)，终端设备(Terminal Equipment)等等。为方便描述，本发明中，上面提到的设备可以统称为用户 设备或UE或终端。以下本发明主要以UE/终端为车辆进行示例性说明。
本发明所涉及到的基站(base station,简称BS)是一种部署在无线接入网中用以为UE提供无线通信功能的装置。所述基站可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在LTE网络中，称为演进的节点B(evolved NodeB简称：eNB或者eNodeB),在第三代3G网络中，称为节点B(Node B)等等。为方便描述，本发明中，上述为UE提供无线通信功能的装置统称为基站或BS。
各终端在选择通信资源时，两个或多个终端可能会选择了同一通信资源，从而产生了在资源占用方面的冲突或者说是碰撞(coll ision，冲突/碰撞)，在本发明中对这一现象可简称为冲突或资源冲突。
在本发明中，控制设备是为了避免资源冲突而对终端所用的通信资源进行规划或协调的设备。作为示例，控制设备可以为基站，或者是RSU(Road Side Unit，路边单元)，等等。
本发明描述的技术可以适用于LTE系统，或其他采用各种无线接入技术的无线通信系统，例如采用码分多址，频分多址，时分多址，正交频分多址，单载波频分多址等接入技术的系统。此外，还可以适用于使用LTE系统后续的演进系统，如第五代5G系统等。为清楚起见，这里仅以LTE系统为例进行说明。在LTE系统中，演进的UMTS陆面无线接入(Evolved Universal Terrestrial Radio Access Network简称E-UTRAN)作为无线接入网，演进分组核心网(Evolved Packet,Core,简称EPC)作为核心网。UE通过E-UTRAN，及EPC接入IMS网络。
下面将基于上面所述的本发明涉及的共性方面，对本发明实施例进一步详细说明。
图1是本发明中一种场景示意图。在图1中，101～103均为车辆(Vehicle)，各车辆相互之间可以进行直连通信，例如每辆车均可收发包含车速、行驶方向、具体位置、是否踩了紧急刹车等的安全信息，从而更好的确保行车安全。车辆之间的这种通信可以称为V2V(Vehicle to Vehicle，车辆到车辆)，作为示例具体可以基于LTE中的D2D技术来实现。此外在图1中，还可以存在控制设备104，例如控制设备104可以为基站或RSU(Road Side Unit，路边单元)。其中RSU可以为UE类型的RSU(UE-Type RSU)，也可以为基站类型的RSU，对此本发明并不进行限制。
由于D2D分布式的传输模式采用的是随机发送机制，因此可能会存在多个 车辆随机选择了相同的资源并发送数据的情况，这将引起对资源占用的冲突。作为示例可参见图2所示，在图2中车辆101和车辆103均选择了同一资源块进行消息的发送，于是产生了冲突，但车辆101和103并不知晓彼此之间已产生冲突，故即不会采取应对措施，结果导致资源冲突持续，影响了信息传输的可靠性，降低了整个系统的安全性。
图3是根据本发明一示例性实施例示出的一种通信资源协调方法的流程图。该方法可用于用于控制设备，如基站或RSU。
参见图3所示，该方法可以包括如下步骤：
步骤S301，获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP。
以V2V场景为例，每辆车都可以对外广播包含了车速、行驶方向、具体位置、是否踩了紧急刹车等内容的数据包，也即安全信息，而RSU可以接收到各车辆所广播的安全信息，进而可以检测出相关通信资源的RSRP。
作为示例可参见图4所示，在图4中，路边单元104接收到了各车辆所广播的安全信息，便可以检测出各相关的通信资源的RSRP数值。
步骤S302，判断所述RSRP是否满足预设条件。
对于预设条件的具体内容本实施例并不进行限制，本领域技术人员可以根据不同场景或需求自行进行设计。
作为示例，所述预设条件可以包括：
所述RSRP大于预设门限的持续时间已超过第一预设时长，并且，无法解调出使用所述通信资源的数据包所携带的数据。
以UE-Type RSU为例，UE-Type RSU可以基于RSRP功率检测，判断每个通信资源是否产生了冲突。当读取SA(Scheduling Assignment，调度分配)发现某个通信资源上有数据包传输，且该资源的RSRP大于某个功率门限，且超过这个门限一段时间，但是该资源位置的数据无法解调，则说明出现资源碰撞的概率较大，也即可推断出有至少两个终端选择了该同一资源进行数据传输，造成资源冲突。
另外，RSU所使用的上述功率门限和超过门限的时间可以是自身预配置的。对于UE-Type RSU来讲，其所使用的功率门限和超过门限的时间也可以是上一级(如基站类型的RSU)使用专用信令为UE-Type RSU配置的。
步骤S303，如果所述RSRP满足预设条件，则对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传。
作为示例可参见图5所示，在图5中，路边单元104发现产生了资源冲突后，将产生冲突的资源通过该消息对外进行广播，各车辆在收到该消息后，便可以根据该消息判断是否是自己所使用的通信资源遇到了资源冲突，进而采取应对措施。
对于该消息的具体内容本实施例也并不进行限制，本领域技术人员可以根据不同场景或需求自行进行设计。
作为示例，所述消息可以为专用指示消息，或者，所述消息也可以通过在已有消息中增加比特位来生成。
例如RSU检测到资源冲突后，可以通过两种方式进行冲突情况的通知，一个是通过专用的冲突指示数据包，也即专用指示消息，另一个是通过在MAC(Medium Access Control，媒质接入控制)头中增加比特信息来指示碰撞情况。
当所述消息为专用指示消息时，所述专用指示消息每隔P/2时长由所述控制设备发送一次，所述专用指示消息用于指示过去P/2时长内发生冲突的通信资源，每个通信资源用第一预设数量的比特位指示，P为所述数据包发送时的最大时延。
作为示例，每个资源位置可以用8比特表示，每一个资源位置按频率和时间依次标识。
可参见图6及图7所示，在图7中给出了专用指示消息，也即冲突指示数据包的一种示例，在图6中，除了占用24比特位的源标识(Source ID)和占用了16比特位的目的标识(Target ID)之外，该数据包还包括载荷(payload)，用于指示出发生冲突的通信资源，payload可以包括若干比特位。
参考图7，payload中的第一部分(符号#1)指示出一个出现冲突的资源位置，第二部分(符号#2)指示出另一个出现冲突的资源位置，等等。
当所述消息通过在已有消息中增加比特位来生成时，所述消息为在消息头中增加了第二数量的比特位的媒质接入控制MAC消息，所述第二数量的比特位用于指示最近的第二预设时长内发生冲突的通信资源。
例如可以在MAC头中增加16比特，用于指示过去5ms是否发生资源冲突。作为示例可参见图8及图9所示，在图8中显示的是被修改了的MAC sub-header格式，V2V MAC sub-header用于指示对冲突情况。在图9中，一共有15个资源，可以用16比特位进行指示，其中值为1的比特位代表所对应的资源产生了冲突。
在本实施例中，针对终端不知晓自身所选择的通信资源与其他终端是否发 生冲突的问题，使用路边单元等控制设备对各终端的资源冲突情况进行检测并及时通知给各终端，使终端可以获知所用资源是否产生冲突并在产生冲突时重新选择资源，及时进行数据包的重传，这样降低了再次冲突的概率，有效避免了持续冲突的产生，进而增强了数据包传输的可靠性，也提升了系统安全性。
图10是根据本发明一示例性实施例示出的一种通信资源协调方法的流程图。该方法可用于终端，如车辆等。
参见图10所示，该方法可以包括如下步骤：
步骤S1001，接收消息，其中所述消息用于指示发生冲突的通信资源。
作为示例该消息的具体结构、内容等可参见上文所述，此处不再赘述。
步骤S1002，根据所述消息，判断所述终端所使用的通信资源是否发生冲突。
步骤S1003，如果所述终端所使用的通信资源发生冲突，则重新选择通信资源以进行数据包的重传。
而如果终端所使用的通信资源没有发生冲突，则在下一个发送周期仍然沿用原有资源进行数据传输即可。
对于具体如何重新选择通信资源，本实施例并不进行限制，本领域技术人员可以根据不同场景或需求自行进行设计。例如可以在可选资源中随机进行重选。
在本实施例或本发明其他某些实施例中，所述重新选择通信资源，可以包括：
在当前发送周期的剩余时间内，选择指定通信资源进行数据包的重传，所述指定通信资源为空闲通信资源中与发生冲突的通信资源最邻近的通信资源。
例如若所述终端在一个发送周期内的第N个子帧(一个子帧对应1ms)发送数据包时所占用的通信资源发生冲突，则在该周期剩余的P-N时间内从空闲通信资源中选择与发生冲突的通信资源最邻近的通信资源进行数据包的重传，其中P为数据包发送时的最大时延(单位也是ms)，也即所述发送周期的长度。
另外在个别情况下，即已没有空闲通信资源可用，则可以采取其他措施，对此本实施例也并不进行限制。
在本实施例或本发明其他某些实施例中，如果没有空闲通信资源可用，则将检测到的RSRP最小的通信资源作为所述指定通信资源。例如可以将上一个发送周期内检测到的RSRP最小的通信资源作为所述指定通信资源。
这样就意味着选择了一个距离本车辆最远的车辆所预留的资源进行复用，从而尽可能的避免较近的车辆的干扰。
此外，当接收到至少两个所述消息，且所述至少两个所述消息对发生冲突的通信资源的指示存在矛盾时，使用预设策略处理所述矛盾。
例如某一消息指示出本车辆所选的通信资源发生了冲突(用1表示)，而另一消息指示出本车辆所选的通信资源未发生冲突(用0表示)，两个消息存在矛盾，此时可以使用“或”的预设策略进行处理，也即将两种指示进行“或”的布尔操作(1 or 0 ＝1)，换句话说，预设策略可以为：只要有消息指示出某通信资源存在冲突，则就确定该通信资源存在冲突。
在本实施例中，针对终端不知晓自身所选择的通信资源与其他终端是否发生冲突的问题，使用路边单元等控制设备对各终端的资源冲突情况进行检测并及时通知给各终端，使终端可以获知所用资源是否产生冲突并在产生冲突时重新选择资源，及时进行数据包的重传，这样降低了再次冲突的概率，有效避免了持续冲突的产生，进而增强了数据包传输的可靠性，也提升了系统安全性。
下面结合一个场景对本发明方案作进一步描述。
图11是根据本发明一示例性实施例示出的一种通信资源协调方法的信令图。在图11中，U1、U2...Un均为车辆，此外还有RSU。
步骤S1101，RSU通过PSBCH信道向覆盖范围内的各车辆广播预配置信息。
例如该预配置信息可以包括RSU所分配的传输资源等等。
步骤S1102，Un使用自身所选择的通信资源对外发送数据包(如MAC PDU)，被RSU接收到。
PDU为Protocol Data Unit，即协议数据单元。
步骤S1103，U2使用自身所选择的通信资源对外发送数据包(如MAC PDU)，被RSU接收到。
步骤S1104，U1使用自身所选择的通信资源对外发送数据包(如MAC PDU)，被RSU接收到。
步骤S1105，RSU通过检测各车辆所发送的数据包，发现在某个通信资源上产生了冲突。
步骤S1106，RSU将通信资源产生冲突这一情况通过专用指示消息告知各车辆。
步骤S1107，各车辆检查是否是自己所使用的通信资源产生了冲突。
步骤S1108，U1发现自己所使用的通信资源产生了冲突，于是进行退避，也即重新选择其他通信资源，并使用重选的通信资源发送数据包。
在本实施例中，针对终端不知晓自身所选择的通信资源与其他终端是否发生冲突的问题，使用路边单元等控制设备对各终端的资源冲突情况进行检测并 及时通知给各终端，使终端可以获知所用资源是否产生冲突并在产生冲突时重新选择资源，及时进行数据包的重传，这样降低了再次冲突的概率，有效避免了持续冲突的产生，进而增强了数据包传输的可靠性，也提升了系统安全性。
图12是根据本发明一示例性实施例示出的一种通信资源协调装置的示意图，所述装置可以用于控制设备，所述装置可以包括：
功率获取单元1201，用于获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP；
功率判断单元1202，用于判断所述功率获取单元1201获取的RSRP是否满足预设条件；
消息发送单元1203，用于当所述功率判断单元1202判断所述RSRP满足预设条件时，对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传。
在本实施例或本发明其他某些实施例中，所述预设条件包括：
所述RSRP大于预设门限的持续时间已超过第一预设时长，并且，无法解调出使用所述通信资源的数据包所携带的数据。
在本实施例或本发明其他某些实施例中，所述消息为专用指示消息，或者，所述消息通过在已有消息中增加比特位来生成。
在本实施例或本发明其他某些实施例中：
当所述消息为专用指示消息时，所述专用指示消息每隔P/2时长由所述控制设备发送一次，所述专用指示消息用于指示过去P/2时长内发生冲突的通信资源，每个通信资源用第一预设数量的比特位指示，P为所述数据包发送时的最大时延。
在本实施例或本发明其他某些实施例中：
当所述消息通过在已有消息中增加比特位来生成时，所述消息为在消息头中增加了第二数量的比特位的媒质接入控制MAC消息，所述第二数量的比特位用于指示最近的第二预设时长内发生冲突的通信资源。
图13是根据本发明一示例性实施例示出的一种通信资源协调装置的示意图，所述装置可以用于终端，所述装置可以包括：
消息接收单元1301，用于接收消息，所述消息用于指示发生冲突的通信资源；
冲突判断单元1302，用于根据所述消息接收单元1301接收的消息，判断所述终端所使用的通信资源是否发生冲突；
资源重选单元1303，用于当所述冲突判断单元1302确定所述终端所使用 的通信资源发生冲突时，重新选择通信资源以进行数据包的重传。
在本实施例或本发明其他某些实施例中，所述重新选择通信资源，包括：
在当前发送周期的剩余时间内，选择指定通信资源进行数据包的重传，所述指定通信资源为空闲通信资源中与发生冲突的通信资源最邻近的通信资源。
在本实施例或本发明其他某些实施例中，所述资源重选单元还用于：
如果没有空闲通信资源可用，则将检测到的RSRP最小的通信资源作为所述指定通信资源。
在本实施例或本发明其他某些实施例中，所述装置还包括：
矛盾处理单元，用于当所述消息接收单元接收到至少两个所述消息，且所述至少两个所述消息对发生冲突的通信资源的指示存在矛盾时，使用预设策略处理所述矛盾。
关于上述实施例中的装置，其中各个单元执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
图14示出了上述实施例中所涉及的UE的一种可能的设计结构的简化示意图。所述UE例如可以包括发射器1401，接收器1402，控制器/处理器1403，存贮器1404和调制解调处理器1405。
发射器1401调节(例如，模拟转换、滤波、放大和上变频等)该输出采样并生成上行链路信号，该上行链路信号经由天线发射给基站等。在下行链路上，天线接收基站等发射的下行链路信号。接收器1402调节(例如，滤波、放大、下变频以及数字化等)从天线接收的信号并提供输入采样。在调制解调处理器1405中，编码器1406接收要在上行链路上发送的业务数据和信令消息，并对业务数据和信令消息进行处理(例如，格式化、编码和交织)。调制器1407进一步处理(例如，符号映射和调制)编码后的业务数据和信令消息并提供输出采样。解调器1409处理(例如，解调)该输入采样并提供符号估计。解码器1408处理(例如，解交织和解码)该符号估计并提供发送给UE的已解码的数据和信令消息。编码器1406、调制器1407、解调器1409和解码器1408可以由合成的调制解调处理器1405来实现。这些单元根据无线接入网采用的无线接入技术(例如，LTE及其他演进系统的接入技术)来进行处理。
控制器/处理器1403对UE的动作进行控制管理，用于执行上述实施例中由UE进行的处理。例如用于控制UE接收消息，根据所述消息判断所述UE所使用的通信资源是否发生冲突，和/或本发明所描述的技术的其他过程。作为示例，控制器/处理器1403用于支持UE执行图10所示的方法。存储器1404用于存储用于UE的程序代码和数据等。
图15示出了上述实施例中所涉及的基站的一种可能的结构示意图。
基站包括发射器/接收器1501,控制器/处理器1502，存储器1503以及通信单元1504。所述发射器/接收器1501用于支持基站与上述实施例中的所述的UE之间收发信息，以及支持所述UE与其他UE之间进行无线电通信。所述控制器/处理器1502执行各种用于与UE通信的功能。在上行链路，来自所述UE的上行链路信号经由天线接收，由接收器1501进行调解，并进一步由控制器/处理器1152进行处理来恢复UE所发送到业务数据和信令信息。在下行链路上，业务数据和信令消息由控制器/处理器1502进行处理，并由发射器1501进行调解来产生下行链路信号，并经由天线发射给UE。
控制器/处理器1502还执行图3中的方法和/或用于本申请所描述的技术的其他过程。例如,用于获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP，等等。存储器1503用于存储基站的程序代码和数据。通信单元1504用于支持基站与其他网络实体进行通信。
可以理解的是，图15仅仅示出了基站的简化设计。在实际应用中，基站可以包含任意数量的发射器，接收器，处理器，控制器，存储器，通信单元等，而所有可以实现本发明的基站都在本发明的保护范围之内。
用于执行本发明上述基站、UE功能的控制器/处理器可以是中央处理器(CPU)，通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)，现场可编程门阵列(FPGA)或者其他可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
结合本发明公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于用户设备中。当然，处理器和存储介质也可以作为分立组件存在于用户设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本发明所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现 时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已，并不用于限定本发明的保护范围，凡在本发明的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本发明的保护范围之内。

Claims (25)

  1. 一种通信资源协调方法，其特征在于，所述方法用于控制设备，所述方法包括：
    获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP；
    判断所述RSRP是否满足预设条件；
    如果所述RSRP满足预设条件，则对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传。
  2. 根据权利要求1所述的方法，其特征在于，所述预设条件包括：
    所述RSRP大于预设门限的持续时间已超过第一预设时长，并且，无法解调出使用所述通信资源的数据包所携带的数据。
  3. 根据权利要求1所述的方法，其特征在于，所述消息为专用指示消息，或者，所述消息通过在已有消息中增加比特位来生成。
  4. 根据权利要求3所述的方法，其特征在于：
    当所述消息为专用指示消息时，所述专用指示消息每隔P/2时长由所述控制设备发送一次，所述专用指示消息用于指示过去P/2时长内发生冲突的通信资源，每个通信资源用第一预设数量的比特位指示，P为所述数据包发送时的最大时延。
  5. 根据权利要求3所述的方法，其特征在于：
    当所述消息通过在已有消息中增加比特位来生成时，所述消息为在消息头中增加了第二数量的比特位的媒质接入控制MAC消息，所述第二数量的比特位用于指示最近的第二预设时长内发生冲突的通信资源。
  6. 根据权利要求1～5任一项所述的方法，其特征在于，所述终端为车辆，所述控制设备为基站或路边单元RSU，所述数据包为用于确保行车安全的安全信息。
  7. 一种通信资源协调方法，其特征在于，所述方法用于终端，所述方法包括：
    接收消息，所述消息用于指示发生冲突的通信资源；
    根据所述消息，判断所述终端所使用的通信资源是否发生冲突；
    如果所述终端所使用的通信资源发生冲突，则重新选择通信资源以进行数据包的重传。
  8. 根据权利要求7所述的方法，其特征在于，所述重新选择通信资源，包括：
    在当前发送周期的剩余时间内，选择指定通信资源进行数据包的重传，所述指定通信资源为空闲通信资源中与发生冲突的通信资源最邻近的通信资源。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    如果没有空闲通信资源可用，则将检测到的RSRP最小的通信资源作为所述指定通信资源。
  10. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    当接收到至少两个所述消息，且所述至少两个所述消息对发生冲突的通信资源的指示存在矛盾时，使用预设策略处理所述矛盾。
  11. 根据权利要求7～10任一项所述的方法，其特征在于，所述终端为车辆，所述控制设备为基站或路边单元RSU，所述数据包为用于确保行车安全的安全消息。
  12. 一种通信资源协调装置，其特征在于，所述装置用于控制设备，所述装置包括：
    功率获取单元，用于获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP；
    功率判断单元，用于判断所述功率获取单元获取的RSRP是否满足预设条件；
    消息发送单元，用于当所述功率判断单元判断所述RSRP满足预设条件时，对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传。
  13. 根据权利要求12所述的装置，其特征在于，所述预设条件包括：
    所述RSRP大于预设门限的持续时间已超过第一预设时长，并且，无法解调出使用所述通信资源的数据包所携带的数据。
  14. 根据权利要求12所述的装置，其特征在于，所述消息为专用指示消息，或者，所述消息通过在已有消息中增加比特位来生成。
  15. 根据权利要求14所述的装置，其特征在于：
    当所述消息为专用指示消息时，所述专用指示消息每隔P/2时长由所述控制设备发送一次，所述专用指示消息用于指示过去P/2时长内发生冲突的通信资源，每个通信资源用第一预设数量的比特位指示，P为所述数据包发送时的最大时延。
  16. 根据权利要求14所述的装置，其特征在于：
    当所述消息通过在已有消息中增加比特位来生成时，所述消息为在消息头中增加了第二数量的比特位的媒质接入控制MAC消息，所述第二数量的比特位用于指示最近的第二预设时长内发生冲突的通信资源。
  17. 根据权利要求12～16任一项所述的装置，其特征在于，所述终端为车辆，所述控制设备为基站或路边单元RSU，所述数据包为用于确保行车安全的安全信息。
  18. 一种通信资源协调装置，其特征在于，所述装置用于终端，所述装置包括：
    消息接收单元，用于接收消息，所述消息用于指示发生冲突的通信资源；
    冲突判断单元，用于根据所述消息接收单元接收的消息，判断所述终端所使用的通信资源是否发生冲突；
    资源重选单元，用于当所述冲突判断单元确定所述终端所使用的通信资源发生冲突时，重新选择通信资源以进行数据包的重传。
  19. 根据权利要求18所述的装置，其特征在于，所述重新选择通信资源，包括：
    在当前发送周期的剩余时间内，选择指定通信资源进行数据包的重传，所述指定通信资源为空闲通信资源中与发生冲突的通信资源最邻近的通信资源。
  20. 根据权利要求19所述的装置，其特征在于，所述资源重选单元还用于：
    如果没有空闲通信资源可用，则将检测到的RSRP最小的通信资源作为所述指定通信资源。
  21. 根据权利要求18所述的装置，其特征在于，所述装置还包括：
    矛盾处理单元，用于当所述消息接收单元接收到至少两个所述消息，且所述至少两个所述消息对发生冲突的通信资源的指示存在矛盾时，使用预设策略处理所述矛盾。
  22. 根据权利要求18～21任一项所述的装置，其特征在于，所述终端为车辆，所述控制设备为基站或路边单元RSU，所述数据包为用于确保行车安全的安全消息。
  23. 一种控制设备，其特征在于，包括：
    接收器，用于接收数据包；
    至少一个处理器，用于获取接收到的数据包所使用的通信资源的参考信号接收功率RSRP，判断所述RSRP是否满足预设条件，如果所述RSRP满足预设条件，则使用发射器对外广播消息，所述消息用于指示所述通信资源已发生冲突，以使使用所述通信资源的终端选择其他通信资源进行数据包重传；
    发射器，用于对外广播所述消息。
  24. 一种终端，其特征在于，包括：
    接收器，用于接收消息，所述消息用于指示发生冲突的通信资源；
    至少一个处理器，用于根据所述消息判断所述终端所使用的通信资源是否发生冲突，如果所述终端所使用的通信资源发生冲突，则重新选择通信资源以进行数据包的重传；
    发射器，用于使用所述重新选择的通信资源进行数据包的重传。
  25. 一种通信系统，其特征在于，所述系统包括如权利要求24所述的终端和如权利要求23所述的控制设备。
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CN113163428B (zh) * 2021-05-19 2023-03-24 浙江凡双科技有限公司 一种低复杂度低时延和低信令开销的5g数据传输方法
CN113163428A (zh) * 2021-05-19 2021-07-23 浙江凡双科技有限公司 一种低复杂度低时延和低信令开销的5g数据传输方法

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