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WO2018133133A1 - Procédé d'utilisation de ressources, dispositif associé et système - Google Patents

Procédé d'utilisation de ressources, dispositif associé et système Download PDF

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Publication number
WO2018133133A1
WO2018133133A1 PCT/CN2017/073251 CN2017073251W WO2018133133A1 WO 2018133133 A1 WO2018133133 A1 WO 2018133133A1 CN 2017073251 W CN2017073251 W CN 2017073251W WO 2018133133 A1 WO2018133133 A1 WO 2018133133A1
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WO
WIPO (PCT)
Prior art keywords
subframe
signal
terminal
reserved
reserved subframe
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Application number
PCT/CN2017/073251
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English (en)
Chinese (zh)
Inventor
曾勇波
才宇
王达
王键
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780083533.2A priority Critical patent/CN110178404B/zh
Publication of WO2018133133A1 publication Critical patent/WO2018133133A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a resource usage method, related apparatus, and system.
  • LTE-V Long Term Evolution
  • LTE-Vehicle is a vehicle networking standard based on Long Term Evolution (LTE) communication technology.
  • the 3GPP RAN1 Working Group initiated the standardization of LTE-V in August 2015.
  • the research scope includes V2V (Vehicle-To-Vehicle) communication, V2P (Vehicle-To-Pedestrian, vehicle-pedestrian) communication, and V2I ( Vehicle to Infrastructure, vehicle and infrastructure network, is collectively referred to as V2X (Vehicle to Everything).
  • V2X Vehicle to Infrastructure, vehicle and infrastructure network
  • Currently, the first version of the standardized specification for V2X based on LTE-V has been finalized.
  • LTE-V may also be referred to as Cellular-V2X (Celluar-V2X, C-V2X).
  • the terminals in the Internet of Vehicles may be Vehicle-UE (V-UE), Handheld Terminal (P-UE), or other terminals that support V2X functions.
  • V-UE Vehicle-UE
  • P-UE Handheld Terminal
  • V2X Vehicle-UE
  • V-UE Vehicle-UE
  • P-UE Handheld Terminal
  • a terminal in the Internet of Vehicles can send a Sidelink Synchronization Signal (SLSS) for synchronization with other terminals.
  • SLSS Sidelink Synchronization Signal
  • the period of the SLSS is 160 milliseconds.
  • a V2X resource pool can be defined by a repeated bit map (Bitmap).
  • the length of the Bitmap (the number of bits in the Bitmap) can take a value from the set ⁇ 10, 16, 20, 30, 40, 50, 60, 100 ⁇ .
  • Bitmap defines which subframes in the V2X resource pool can be used to transmit V2X's Scheduling Assignment SA (also known as Sidelink Control Information (SCI)) and data (Data).
  • SA Scheduling Assignment
  • Data data
  • SLSS subframes are not included in the resource pool defined by Bitmap.
  • the available resources indicated by the Bitmap ie, the subframes used to transmit the V2X data) constitute a logical resource set, and the subframes that can be used to transmit the V2X data may be referred to as logical subframes.
  • the direct frame number (DFN) period (applicable to the scene outside the LTE signal coverage) or the system frame number (SFN) period (applicable to the scene within the LTE signal coverage) V2X resources can be represented by an integer number of Bitmaps.
  • a DFN period or SFN period contains 10240 subframes. After the SLSS subframe is removed, the number of remaining subframes may not be divisible by the specified Bitmap. Therefore, some reserved subframes need to be configured to ensure that the remaining number of subframes can be divisible by the specified Bitmap.
  • FIG. 1 exemplarily shows a configuration of a V2X resource pool and a SLSS resource, and a reserved subframe in a DFN cycle.
  • the length of the Bitmap is 100, that is, each V2X cycle contains 100 logical subframes.
  • some reserved subframes are evenly distributed in the DFN cycle, such as DFN213 and DFN427. Referring to the foregoing, it can be known that the total number of logical subframes and reserved subframes in the DFN period needs to be divisible by the length of the Bitmap (ie, 100).
  • the number of reserved subframes in each DFN or SFN period is related to the SLSS resource configuration and the length of the Bitmap.
  • Table 1 illustrates the different Bitmap lengths and the different SLSS resource configurations (the number of SLSS subframes per SLSS period) corresponding to different reserved subframes.
  • the SFN/DFN period in turn contains 10240 subframes (integer multiples of 16). Therefore, the number of remaining subframes except for the SLSS subframe in the DFN/SFN period is also an integer multiple of 16, and can be divisible by a Bitmap of length 16.
  • the number of reserved subframes can be up to 76. In other configurations, different numbers of reserved subframes need to be configured in the DFN/SFN period.
  • Bitmap length 0 sync resources 1 sync resource 2 simultaneous resources 3 simultaneous resources 16 bits 0 0 0 0 20 bits 0 16 12 8 100 bits 40 76 12 48
  • the present application provides a resource usage method, a related device, and a system, and improves resource utilization by configuring a usage policy of a reserved subframe in a V2X resource pool.
  • the application provides a resource usage method, which is applied to a network device, and may include: the network device sends first indication information and/or second indication information to a terminal, where the first indication information is used. And indicating whether the reserved subframe in the first resource set is used to transmit the first signal, where the second indication information is used to indicate a usage policy of the reserved subframe; the usage policy is used to indicate that the terminal uses the reserved subframe The frame transmits the first signal.
  • the application provides a resource usage method, which is applied to the terminal side, and may include: when the reserved subframe in the first resource set can be used to transmit the first signal, the terminal may indicate according to the network device or And configuring a usage policy of the reserved subframe, by using the reserved subframe to transmit the first signal.
  • the terminal may determine, according to an indication of the network device, that is, the first indication information, whether the reserved subframe is used to transmit the first signal.
  • the terminal may also determine whether the reserved subframe can be used to transmit the first signal according to a trigger condition pre-configured by the protocol, such as whether the channel busyness exceeds a preset threshold.
  • the use of the reserved subframe can be implemented to improve resource utilization.
  • whether the reserved subframe can be used for transmitting the first signal can be determined by the following two manners.
  • the first the way the network device is configured
  • the network device may send the first indication information to the terminal, to indicate whether the reserved subframe can be used to transmit the first signal.
  • the network device may carry the first indication information in a system information block (SIB).
  • SIB system information block
  • the first indication information may be a 1-bit enable bit.
  • the value of the enable bit may indicate that the reserved subframe can be used to transmit the first signal, otherwise, the reserved subframe cannot be used for transmission.
  • the network device may determine the value of the enable bit according to a preset trigger condition or other policies. For example, the value of the enable bit is determined according to a channel busy ratio (CBR).
  • CBR channel busy ratio
  • the protocol may pre-configure conditions under which the reserved subframe can be used to transmit the first signal. In this way, the terminal can determine, according to the condition, whether the reserved subframe can be used for transmitting the first signal, without obtaining an indication of the network device.
  • the condition may be related to the geographic location of the terminal, for example, the terminal outside the coverage of the base station signal may use the reserved subframe to transmit the first signal.
  • the condition may also be related to the busyness of the channel, for example, when the channel busy ratio (CBR) is higher than a preset threshold, the reserved subframe can be used to transmit the first signal.
  • CBR channel busy ratio
  • the protocol may also pre-configure other conditions that the reserved subframe can be used for transmitting the first signal, which is not limited herein.
  • a part of the reserved subframes in the first resource set may also be used for transmitting purposes other than the first signal, that is, only a part of the reserved subframes can be used to transmit the first signal.
  • a bit map can be used to indicate which reserved subframes can be used to transmit the first signal.
  • the network device may carry the Bitmap in an SIB message for broadcast.
  • the usage policy of the reserved subframe may include the following two types:
  • the first usage policy a terminal configured as a high priority preferentially transmits the first signal using the reserved subframe.
  • Use policy one the priority policy.
  • certain types of terminals or certain types of services may be preferentially used by the network device configuration or pre-configured manner.
  • a terminal having a low transmission power (such as a pedestrian terminal) is configured to preferentially use the reserved subframe. In this way, other terminals with higher transmission power, such as vehicle-mounted terminals, can be prevented from forming interference to the terminal with low transmission power.
  • a terminal employing a random resource selection scheme is configured to preferentially use the reserved subframe. It can be understood that the general terminal uses the interception mechanism to select logical resources, and uses the available resources that are heard to avoid resource conflicts. If a logical resource selection method is used to select a logical resource, there is a possibility that a resource conflict occurs with other terminals. However, if the terminal adopting the random resource selection mode can use the reserved subframe, that is, randomly select the reserved subframe, it can avoid resource conflicts with other terminals that use the logical subframe to transmit the first signal.
  • the terminal that does not retransmit the first signal is configured to preferentially use the reserved subframe. It can be understood that the terminal that does not retransmit the first signal uses the reserved subframe, and the indication of use for the reserved subframe can be simplified.
  • a terminal that does not select a suitable resource is configured to preferentially use the reserved subframe. In this way, the resource rate can be increased, enabling more terminals to transmit the first signal.
  • the terminal may be configured to preferentially use the reserved subframe. In this way, different priorities of services can be differentiated to improve the system's business processing capabilities.
  • a terminal that does not perform resource reservation is configured to preferentially use the reserved subframe. It can be understood that if the terminal that does not perform resource reservation reselects the resource every time, if the terminal uses the reserved subframe to transmit the first signal, the indication in the resource reservation process can be avoided, and the avoidance can also be avoided. A resource conflict occurs with other terminals that transmit the first signal using logical subframes.
  • the resource reservation please refer to the foregoing content, and details are not described herein again.
  • the priority policy may also configure other types of terminals or other types of services to preferentially use the reserved subframes.
  • a second usage strategy transmitting the first signal using reserved subframes and logical subframes that satisfy the condition.
  • the spacing between the reserved subframe and the logical subframe that meet the condition needs to meet a preset condition, where the preset condition may include: the spacing is less than or equal to the first time value, or the spacing is equal to The first time value.
  • the preset condition may include: the spacing is less than or equal to the first time value, or the spacing is equal to The first time value.
  • There is a mapping relationship between the reserved subframe and the logical subframe satisfying the condition which is defined by the preset condition.
  • the value of the first time value may be indicated by a network device or pre-configured by a protocol.
  • the network device may carry the first time value in the SIB message.
  • the example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting.
  • the existing LTE-V standard specifies that the maximum interval between the first transmission and the retransmission of the first signal is 15 ms. In order to be consistent with existing standards, the range of values of the first time value can be defined as [1, 15].
  • the usage policy may be indicated by means of network device configuration, or may be specified by a protocol pre-configuration method.
  • the network device may send indication information to the terminal to indicate which usage policy is used by the current system.
  • the indication information may be referred to as second indication information.
  • the network device may carry the second indication information in an SIB message. For example, a field is extended in the SIB message to indicate which usage policy the terminal uses.
  • SIB message For example, a field is extended in the SIB message to indicate which usage policy the terminal uses.
  • the terminal side in order to prevent the use of the reserved subframe from affecting the existing resource reservation mechanism, the terminal side provides the following two operations:
  • the first type of terminal side operation in order to prevent the use of the reserved subframe from affecting the existing resource reservation mechanism, the terminal may indicate the use of the reserved subframe and adjust the resource reservation of the next transport block. .
  • the terminal may send usage indication information about the reserved subframe, where the usage indication information is used to indicate whether the terminal uses the reserved subframe.
  • the usage indication information may be carried in the control information sent by the terminal, for example, in a scheduling indication.
  • the scheduling indication (SA) sent by the terminal may be extended, and the usage indication information is carried by using reserved bits in the scheduling indication.
  • the usage indication information may be used to indicate that the resource reservation of the next transport block is adjusted.
  • the resource reservation indication in the SA may be adjusted, including: adding 1 to the resource reserved position of the next transport block, and adding The time interval between the initial transmission and the retransmission of the next transport block is incremented by one.
  • the receiving end detects that the first transmission of the first signal uses the reserved subframe, the resource reservation of the next transport block may be added according to the adjusted resource reservation indication in the SA.
  • the adjustment also adds 1 to the time interval between the initial transmission and the retransmission of the next transport block, so that the receiving end can correctly receive the next transport block for the first transmission and the retransmission.
  • the resource reservation indication in the SA may be adjusted, including: adding a resource reservation position of the next transport block by one.
  • the receiving end detects that the retransmission of the first signal uses a reserved subframe, the resource reservation of the next transport block may be added according to the adjusted resource reservation indication in the SA. The adjustment is such that the receiving end can correctly receive the retransmitted next transport block.
  • the data may be simply specified: when the first transmission or retransmission of a certain transport block of the terminal uses the reserved resource. Time and end The end needs to perform resource reselection for the transmission of the next transport block. That is to say, once the terminal uses the reserved subframe, the terminal does not reserve resources for subsequent transmissions, but re-listens the channel and resource selection.
  • the second terminal side operation the terminal re-proports the logical resource number for the logical subframe in the first resource set and the reserved subframe that can be used to transmit the first signal, to obtain a new logic that can be used for transmitting the first signal. Subframe. That is to say, the terminal can use the reserved subframe that can be used to transmit the first signal as a new logical subframe.
  • the manner in which the reserved subframes are distributed in the first resource set may be a centralized distribution manner or a uniform distribution manner.
  • a manner in which the reserved subframes are distributed in the first resource set may be determined according to the number of reserved subframes. Specifically, when the number of the reserved subframes is less than a preset number (such as 16), a centralized distribution manner may be adopted, otherwise, a uniform distribution manner is adopted. In this way, the distribution manner of the reserved subframes can be reasonably determined, and the two problems of maximum balance delay and complex resource number can be realized.
  • the application provides a network device for performing the resource usage method described in the first aspect.
  • the network device can include a memory and a processor, a transmitter and a receiver coupled to the memory, wherein: the transmitter is for transmitting signals to a terminal or other network device, the receiver is for receiving a terminal or other a signal sent by the network device, where the memory is used to store implementation code of the resource usage configuration method described in the first aspect, the processor is configured to execute program code stored in the memory, that is, to perform the first aspect or the first aspect A method of using resources provided by any of the possible embodiments.
  • the application provides a terminal for performing the resource usage method described in the second aspect.
  • the terminal can include a memory and a processor, a transmitter and a receiver coupled to the memory, wherein: the transmitter is for transmitting a signal to a network device or other terminal, the receiver is for receiving a network device or other a signal sent by the terminal, where the memory is used to store implementation code of the resource usage matching method described in the second aspect, the processor is configured to execute the program code stored in the memory, that is, the possibility of performing the second aspect or the second aspect A resource usage method provided by any of the embodiments.
  • a network device comprising a plurality of functional modules for respectively performing the method provided by any one of the first aspect or the possible embodiments of the first aspect.
  • a terminal comprising a plurality of functional modules for respectively performing the method provided by any one of the second aspect or the possible embodiments of the second aspect.
  • a communication system comprising: a network device and a terminal, wherein:
  • the network device is configured to indicate, to the terminal, whether a reserved subframe in the first resource set is used to transmit a first signal, and a usage policy of the reserved subframe; the terminal is used in the first resource set
  • the reserved subframe can be used to transmit the first signal by using the reserved subframe according to a usage policy of the reserved subframe indicated by the base station or when the first signal is transmitted.
  • the base station may be the network device described in the third aspect or the fifth aspect.
  • the base station may also be the terminal mentioned in the fourth aspect or the sixth aspect.
  • a computer readable storage medium storing program code for implementing the resource usage method described in the first aspect, the program code comprising the resource usage method described in the first aspect is provided Execute the instruction.
  • a ninth aspect a computer readable storage medium storing program code for implementing the resource usage method described in the second aspect, the program code comprising the resource usage method described in the second aspect Execute the instruction.
  • FIG. 1 is a schematic diagram of a V2X resource pool involved in the present application
  • FIG. 2 is a schematic diagram of a scenario of a vehicle networking related to the present application.
  • FIG. 3 is a schematic diagram of two LTE-V communication transmission modes involved in the present application.
  • FIG. 5 is a schematic diagram of a hardware architecture of a terminal according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a hardware architecture of a network device according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram showing the available reserved resources by bit mapping provided by the present application.
  • FIG. 8A is a schematic diagram of mapping of a reserved subframe and a logical subframe provided by the present application.
  • FIG. 8B is a schematic diagram of mapping of another reserved subframe and a logical subframe provided by the present application.
  • FIG. 10 is a schematic flowchart diagram of a resource usage method according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a signal flow provided by the present application.
  • FIG. 12 is a schematic diagram of mapping of another reserved subframe and a logical subframe provided by the present application.
  • FIG. 13 is a schematic flowchart diagram of a resource usage method according to another embodiment of the present application.
  • FIG. 14 is a schematic flowchart diagram of a resource usage method according to still another embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a network device and a terminal according to an embodiment of the present application.
  • FIG. 2 shows an application scenario of the LTE-V involved in the present application.
  • the LTE-V communication system may include: a base station 100 and various V2X terminals.
  • the V2X terminal may include: a V-User Equipment, a P-User Equipment, an infrastructure terminal, or other terminals supporting the V2X function.
  • V2X terminals As shown in Figure 2, the communication between V2X terminals can be divided into the following types:
  • V2V (vehicle-vehicle) communication that is, information exchange and reminder between vehicles 200, the most typical application is for anti-collision safety systems between vehicles.
  • V2I (vehicle-infrastructure) communication that is, the vehicle 200 can communicate with the roadside infrastructure 400, such as traffic lights, roadblocks, etc., to acquire road management information such as traffic light signal timing.
  • the roadside infrastructure 400 such as traffic lights, roadblocks, etc.
  • V2P (vehicle-pedestrian) communication i.e., vehicle 200
  • vehicle 200 can communicate with pedestrians 300 or non-motor vehicles on the road, such as issuing a safety warning to pedestrians 300.
  • the LTE-V may also include other forms of V2X communication.
  • V2N Vehicle-To-Network
  • the vehicle 200 can be connected to the cloud server 500 through the mobile communication network, using the application functions of navigation, entertainment, theft prevention, and the like provided by the cloud server 500.
  • the V2X terminal that is in the coverage of the LTE network can access the LTE network through the base station 100, receive the broadcast message sent by the base station 100, or communicate with other V2X terminals through the LTE network. It should be understood that the terminal in the serving cell of the base station 100 is within the coverage of the LTE network, and the terminal outside the serving cell of the base station 100 is outside the coverage of the LTE network.
  • LTE-V provides two complementary V2X transmission modes, as shown in (A) and (B) of Figure 3, respectively:
  • the direct communication transmission mode can be adopted between adjacent in-vehicle terminals. It should be noted that the direct communication transmission mode is also applicable to an environment covered by an LTE network.
  • the network communication transmission mode can refer to (B) in FIG. 3, and the V2X server side message, such as control information or system information, can be broadcast to the V2X terminal through the LTE broadcast mechanism.
  • a V2X terminal can select a resource through a listening mechanism. Specifically, when the V2X terminal detects that the channel has available resources, selects the frequency resource of the first transmission and the possible retransmission, and randomly selects a counter value for the subsequent transmission (transmission of the subsequent transmission block) when the resource is selected (at a certain time) Set randomly within the range), set to N (N is a positive integer, such as 6). If no resource reselection occurs, the V2X terminal will use the previously selected frequency resource in the subsequent N transmissions. Each time the transmission is completed, the counter value is decremented by one until the counter value is reduced to 0, and then the channel is re-listened. Select a resource.
  • a Transmission Block is a data packet on a shared channel, and may include a Protocol Data Unit (PDU) of a Medium Access Control (MAC).
  • PDU Protocol Data Unit
  • MAC Medium Access Control
  • a transport block can be transmitted up to 2 times: first transmission and retransmission.
  • One transmission (first transmission or retransmission) of one transport block occupies 1 subframe in time.
  • the V2X data may include a scheduling indication (SA) and data (Data) transmitted in the same transport block (subframe).
  • SA scheduling indication
  • Data data transmitted in the same transport block (subframe).
  • SA scheduling indication
  • SA includes control information as shown in Table 2:
  • the V2X terminal may carry the following in the scheduling indication of the current transport block.
  • the reserved resource location of a transport block the time interval between the first transmission and the retransmission, and the location of the frequency resource for the first transmission and retransmission.
  • SA scheduling indication
  • Data data corresponding to each data (Data) are both transmitted in the same subframe
  • SA scheduling indication
  • the resource reservation of block 2 is at the subframe after 100 ms of transport block 1), the time interval between the first transmission and the retransmission of transport block 2 is gap, and the frequency resource position of the first transmission and retransmission of transport block 2 is ⁇ f.
  • the examples are only used to explain the content of the present application and should not be construed as limiting.
  • the scheduling indication may be extended, and the reserved bits are used to carry the indication information, which is used to indicate whether the V2X terminal uses the reserved subframe in the V2X resource pool.
  • the reserved bits are used to carry the indication information, which is used to indicate whether the V2X terminal uses the reserved subframe in the V2X resource pool.
  • the terminal 10 can be implemented as an in-vehicle terminal, a handheld terminal, an infrastructure terminal, or other terminal that supports V2X functions.
  • the terminal 10 may include: an input and output module (including an audio input and output module 118, a key input module 116, and a display 120, etc.), a user interface 102, one or more terminal processors 104, a transmitter 106, and a receiving The device 108, the coupler 110, the antenna 114, and the memory 112.
  • an input and output module including an audio input and output module 118, a key input module 116, and a display 120, etc.
  • the terminal 10 may include: an input and output module (including an audio input and output module 118, a key input module 116, and a display 120, etc.), a user interface 102, one or more terminal processors 104, a transmitter 106, and a receiving The device 108, the coupler 110, the antenna 114, and the memory 112.
  • FIG. 5 is exemplified by
  • Communication interface 101 can be used by terminal 10 to communicate with other communication devices, such as V2X terminals or base stations.
  • the communication interface 101 may include: a direct communication interface (such as a PC5 interface) and a network communication interface (such as a Uu interface).
  • the direct communication interface can be used for D2D communication with a neighboring V2X terminal, and the network communication interface can be used for communication with a base station.
  • the terminal 10 may be configured with other types of communication interfaces, such as a WiFi interface, a wired communication interface, and the like.
  • the antenna 114 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • the coupler 110 is configured to divide the communication signal received by the antenna 114 into multiple channels and distribute it to a plurality of receivers 108.
  • the transmitter 106 can be used to perform transmission processing on signals output by the terminal processor 104.
  • the transmitter 106 may include a direct communication transmitter 1061 and a network communication transmitter 1063.
  • the direct communication transmitter 1061 can support the terminal 10 to transmit signals to the adjacent V2X terminal
  • the network communication transmitter 1063 can support the terminal 10 to transmit signals to the base station.
  • Receiver 108 can be used to receive signals received by antenna 114.
  • the receiver 108 may include a direct communication receiver 1081 and a network communication receiver 1083.
  • the direct communication receiver 1081 can support the terminal 10 to receive signals transmitted by neighboring V2X terminals
  • the network communication receiver 1083 can support the terminal 10 to receive signals transmitted by the base station.
  • transmitter 106 and receiver 108 may be considered a wireless modem.
  • the number of the transmitter 106 and the receiver 108 may each be one or more.
  • the terminal 10 may also include other communication components such as a GPS module, a Bluetooth module, a Wireless Fidelity (Wi-Fi) module, and the like. Not limited to direct communication signals and network communication signals in LTE-V, terminal 10 can also support other wireless communication signals, such as satellite signals, Short wave signals and so on.
  • the input and output module can be used to implement interaction between the terminal 10 and the user/external environment, and can mainly include an audio input and output module 118, a key input module 116, a display 120, and the like.
  • the input and output module may further include: a camera, a touch screen, a sensor, and the like.
  • the input and output modules communicate with the terminal processor 104 through the user interface 102.
  • Memory 112 is coupled to terminal processor 104 for storing various software programs and/or sets of instructions.
  • memory 112 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 112 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as ANDROID, IOS, WINDOWS, or LINUX.
  • the memory 112 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the memory 112 can also store a user interface program, which can realistically display the content of the application through a graphical operation interface, and receive user control operations on the application through input controls such as menus, dialog boxes, and keys. .
  • the memory 112 may be used to store an implementation program of the resource usage method provided by one or more embodiments of the present application on the terminal 10 side.
  • the resource usage method provided by one or more embodiments of the present application please refer to the subsequent embodiments.
  • the terminal processor 104 can be used to read and execute computer readable instructions. Specifically, the terminal processor 14 can be used to invoke a program stored in the memory 112, such as the implementation method of the resource usage method provided by one or more embodiments of the present application on the terminal 10 side, and execute the instructions included in the program.
  • the terminal 10 shown in FIG. 5 is only an implementation manner of the embodiment of the present invention. In an actual application, the terminal 10 may further include more or fewer components, which are not limited herein.
  • FIG. 6 illustrates a network device 20 provided by some embodiments of the present application.
  • Network device 20 can be implemented as base station 100 in FIG.
  • network device 20 may include a communication interface 203, one or more network device processors 201, a transmitter 207, a receiver 209, a coupler 211, an antenna 213, and a memory 205. These components can be connected by bus or other means, and FIG. 6 is exemplified by a bus connection. among them:
  • Communication interface 203 can be used by network device 20 to communicate with other communication devices, such as V2X terminals or other network devices.
  • the communication interface 203 may be a network communication interface, such as an LTE (4G) communication interface, a 5G or a future communication interface of a new air interface.
  • the network device 20 may also be configured with a wired communication interface to support wired communication. For example, a backhaul link between one network device 20 and other network devices 20 is a wired communication connection.
  • the antenna 213 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • the coupler 211 can be used to divide the pass signal into multiple paths and distribute it to a plurality of receivers 209.
  • the transmitter 207 can be configured to perform a transmission process on a signal output by the network device processor 201 for transmitting signals to other network devices or V2X terminals.
  • the receiver 209 can be configured to receive a signal received by the antenna 213 for receiving signals transmitted by other network devices or V2X terminals.
  • transmitter 207 and receiver 209 can be viewed as a wireless modem.
  • the number of transmitters 207 and receivers 209 The quantity can be one or more.
  • Memory 205 is coupled to network device processor 201 for storing various software programs and/or sets of instructions.
  • memory 205 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 205 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux.
  • the memory 205 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the memory 205 can be used to store an implementation program of the resource usage method provided by one or more embodiments of the present application on the network device 20 side.
  • the resource usage method provided by one or more embodiments of the present application please refer to the subsequent embodiments.
  • the network device processor 201 can be used to perform wireless channel management, implement call and communication link establishment and teardown, and control the handoff of user equipment in the control area.
  • the network device processor 201 may include: an Administration Module/Communication Module (AM/CM) (a center for voice exchange and information exchange), and a Basic Module (BM). Complete call processing, signaling processing, radio resource management, radio link management and circuit maintenance functions, Transcoder and SubMultiplexer (TCSM) (for multiplexing demultiplexing and code conversion) Function) and so on.
  • AM/CM Administration Module/Communication Module
  • BM Basic Module
  • TCSM Transcoder and SubMultiplexer
  • network device processor 201 is operable to read and execute computer readable instructions. Specifically, the network device processor 201 can be used to invoke a program stored in the memory 205, such as the resource allocation method provided by one or more embodiments of the present application, on the network device 20 side, and execute the instructions included in the program. .
  • the network device 20 may be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), an extended service set (ESS), a NodeB, an eNodeB, and the like.
  • Network device 20 may be implemented as several different types of base stations, such as macro base stations, micro base stations, and the like.
  • Network device 20 may support different wireless technologies, such as cell radio access technology, or WLAN radio access technology, and the like.
  • the network device 20 shown in FIG. 6 is only an implementation manner of the embodiment of the present invention. In an actual application, the network device 20 may further include more or fewer components, which are not limited herein.
  • the embodiment of the present invention provides a resource usage method.
  • the main inventive principle of the present application may include: configuring a usage policy for a reserved subframe in a V2X resource pool, and indicating whether the reserved subframe can be used for transmitting V2X data by means of pre-configuration or network device configuration, if To transmit V2X data, the terminal may use the reserved subframe according to the usage policy. This can improve resource utilization.
  • the terminal may indicate the use of the reserved subframe and adjust the resource reservation indication of the subsequent transmission. In this way, the use of reserved subframes by the terminal does not affect the existing resource reservation mechanism.
  • the terminal may also use a reserved subframe that can be used for transmitting V2X data as a new logical subframe, and renumber the logical resource pool.
  • a V2X resource pool may be referred to as a first resource set, and V2X data may be referred to as a first signal.
  • V2X resource pool may be referred to as a first resource set
  • V2X data may be referred to as a first signal.
  • whether the reserved subframe can be used for transmitting the first signal can be determined by a network device (such as a base station) configuration or a protocol pre-configuration. Described separately below.
  • the network device may send indication information to the terminal to indicate whether the reserved subframe can be used to transmit the first signal.
  • the indication information may be referred to as first indication information.
  • the network device may carry the first indication information in a System Information Block (SIB).
  • SIB System Information Block
  • the first indication information may be a 1-bit enable bit.
  • a value of 1 for the enable bit may indicate that the reserved subframe can be used to transmit the first signal, otherwise it can be indicated that the reserved subframe cannot be used to transmit the first signal.
  • the network device may determine the value of the enable bit according to a preset trigger condition or other policies. For example, the network device may determine the value of the enable bit according to a Channel Busy Ratio (CBR). If the value of the CBR exceeds a preset threshold, the network device may set the enable bit to 1.
  • CBR Channel Busy Ratio
  • the CBR may be defined as a ratio of a sub-channel in which a Sidelink-Received Signal Strength Indication (S-RSSI) exceeds a pre-configured or network configured threshold within an observation time (eg, 100 ms).
  • S-RSSI Sidelink-Received Signal Strength Indication
  • CBR can also be used to characterize the degree of congestion of the channel.
  • the example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting.
  • the partially reserved subframes in the first set of resources may also be used to transmit purposes other than the first signal.
  • a bit map may be used to indicate which reserved subframes can be used to transmit the first signal.
  • the network device may carry the Bitmap in an SIB message for broadcast. It should be noted that the Bitmap here is to indicate which reserved subframes can be used to transmit the first signal, which is different from the Bitmap used to indicate the logical subframe mentioned in the prior art.
  • a Bitmap for indicating a logical subframe may be referred to as a first Bitmap
  • a Bitmap indicating a reserved subframe that can be used for transmitting the first signal may be referred to as a second Bitmap.
  • a shorter second Bitmap may be used to repeatedly indicate a reserved subframe that can be used to transmit the first signal, or a length of 76 (the maximum number of reserved subframes, refer to Table 1) may be used.
  • Two Bitmaps represent reserved subframes that can be used to transmit the first signal.
  • the excess bits may be truncated or the excess bits may be set to zero.
  • FIG. 7 illustrates a case where a 16-bit Bitmap represents 8 reserved subframes in which the tail 8 bits exceeding the number of reserved subframes are set to 0 and truncated.
  • the examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.
  • the protocol may pre-configure the conditions under which the reserved subframe can be used to transmit the first signal. In this way, the terminal can determine whether the reserved subframe can be used to transmit the first signal according to the condition, without obtaining an indication of the network device.
  • the condition can be related to the geographic location of the terminal.
  • the terminal of some preset area may use the reserved subframe to transmit the first signal, and the terminals of other preset areas may not use the reserved subframe to transmit the first signal.
  • the terminal may use the reserved subframe to transmit the first signal. In this way, The terminal that can realize the coverage of the base station signal can also select the resource to transmit the first signal.
  • the conditions can also be related to the degree of channel busyness. For example, when the channel busy ratio (CBR) is higher than a preset threshold, the reserved subframe can be used to transmit the first signal. Thus, when the channel is busy, the terminal can alleviate the channel pressure by retaining the use of the subframe.
  • CBR channel busy ratio
  • the protocol may also pre-configure other conditions that the reserved subframe can be used for transmitting the first signal, which is not limited herein.
  • the protocol may be pre-configured: if the condition that the reserved subframe can be used to transmit the first signal is satisfied, then some or all of the reserved subframes can be used to transmit the first signal. It can be understood that if all reserved subframes can be used to transmit the first signal, there is no need to indicate the reserved subframe by the second Bitmap.
  • the present application mainly provides two usage strategies for the reserved subframes, which are described below.
  • A. Usage Strategy 1 The terminal configured as a high priority preferentially transmits the first signal using the reserved subframe.
  • Use policy one the priority policy.
  • certain types of terminals or certain types of services may be preferentially used by the network device configuration or pre-configured manner.
  • a terminal having a low transmission power (such as a pedestrian terminal) is configured to preferentially use the reserved subframe. In this way, other terminals with higher transmission power, such as vehicle-mounted terminals, can be prevented from forming interference to the terminal with low transmission power.
  • a terminal employing a random resource selection scheme is configured to preferentially use the reserved subframe. It can be understood that the general terminal uses the interception mechanism to select logical resources and use the idle resources that are heard to avoid resource conflicts. If a logical resource selection method is used to select a logical resource, there is a possibility that a resource conflict occurs with other terminals. However, if the terminal adopting the random resource selection mode can use the reserved subframe, that is, randomly select the reserved subframe, it can avoid resource conflicts with other terminals that use the logical subframe to transmit the first signal.
  • the terminal that does not retransmit the first signal is configured to preferentially use the reserved subframe. It can be understood that the terminal that does not retransmit the first signal uses the reserved subframe, and the indication of use for the reserved subframe can be simplified.
  • a terminal that does not select a suitable resource is configured to preferentially use the reserved subframe. In this way, the resource rate can be increased, enabling more terminals to transmit the first signal.
  • the terminal may be configured to preferentially use the reserved subframe. In this way, different priorities of services can be differentiated to improve the system's business processing capabilities.
  • a terminal that does not perform resource reservation is configured to preferentially use the reserved subframe. It can be understood that if the terminal does not reserve resources for subsequent transmissions, the probability of resource collisions occurring in subsequent transmissions is relatively large. However, if the terminal is able to transmit the first signal using the reserved subframe, it is possible to avoid resource conflicts with other terminals that transmit the first signal using the logical subframe.
  • resource reservation please refer to the foregoing content, and details are not described herein again.
  • the priority policy may also configure other types of terminals or other types of services to preferentially use the reserved subframes.
  • the first signal is transmitted using the reserved subframe and the logical subframe satisfying the condition.
  • the spacing between the reserved subframe and the logical subframe that meet the condition needs to meet a preset condition, where the preset condition may include: the spacing is less than or equal to the first time value, or the spacing is equal to The first time value.
  • the preset condition may include: the spacing is less than or equal to the first time value, or the spacing is equal to The first time value.
  • There is a mapping relationship between the reserved subframe and the logical subframe satisfying the condition which is defined by the preset condition.
  • FIG. 8 exemplarily shows a mapping relationship between the logical sub-frame and the reserved sub-frame satisfying the condition.
  • the two subframes are together. Used to transmit the first signal. That is, the terminal associates the two subframes, and performs the first transmission and retransmission of the first signal on the two subframes.
  • the two subframes satisfy a preset condition that the spacing of the reserved subframe and the logical subframe at the resource location is equal to the first time value.
  • Y and Y+offset in the figure indicate another set of logical sub-frames and reserved sub-frames that satisfy the preset condition.
  • the spacing from the reserved subframe at the resource location is equal to the first time value.
  • the resource location of the logical subframe is also determined.
  • FIG. 9 exemplarily shows another mapping relationship between the logical sub-frame and the reserved sub-frame satisfying the condition.
  • the reserved subframe (X+offset) may be associated with a plurality of logical subframes preceding the reserved subframe (ie, from logical subframe X to logical subframe (X+offset-1)). Any one of the logical sub-frames is used to transmit the first signal.
  • the reserved subframe and any one of the plurality of logical subframes preceding the foregoing satisfy another preset condition, that is, the location of the logical subframe on the physical resource and the reserved subframe on the physical resource.
  • the difference in position is less than or equal to offset (ie, the first time value).
  • the spacing between the reserved subframe and the resource location is less than or equal to the first time value.
  • the resource locations of all logical sub-frames are also determined.
  • the usage policy 2 is applicable to a scenario of V2X secondary transmission (first transmission and retransmission).
  • the reserved subframe and logical subframe satisfying the condition are used for performing the first transmission and retransmission of the first signal.
  • the existing LTE-V standard specifies that the maximum interval between the first transmission and the retransmission of the first signal is 15 ms.
  • the range of values of the first time value can be defined as [1, 15].
  • the value of the first time value may be indicated by a network device or pre-configured by a protocol. For example, if the value of the first time value is indicated by the network device, the network device may carry the first time value in the SIB message.
  • the example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting.
  • the usage policy 1 and the usage policy 2 may indicate the usage policy by using a network device configuration manner, or may be configured by a protocol pre-configuration manner. Specify which usage strategy to use.
  • the network device may send indication information to the terminal to indicate which usage policy is used by the current system.
  • the indication information may be referred to as second indication information.
  • the network device may carry the second indication information in an SIB message. For example, a field is extended in the SIB message to indicate which usage policy the terminal uses.
  • SIB message For example, a field is extended in the SIB message to indicate which usage policy the terminal uses.
  • Operation 1 The terminal sends usage indication information about the reserved subframe, and the usage indication information is used to indicate whether the terminal uses the reserved subframe.
  • the usage indication information may be carried in the control information sent by the terminal, for example, in a scheduling indication.
  • the scheduling indication (SA) sent by the terminal may be extended, and the reserved bit of the scheduling indication is used (Reserved) Bits) to carry the usage indication information.
  • a reserved bit of 1 bit in the SA is defined as the usage indication information, and is referred to as "UsingReservedIndicator" for convenience of description.
  • the usage indication information may be used to indicate that the resource reservation of the next transport block is adjusted. It can be understood that since the resource reservation parameters in the SA shown in Table 2 are concepts on the logical resources, the reserved subframes are not included. Therefore, when the terminal uses a reserved subframe in the current transmission (first transmission or retransmission), the terminal needs to add 1 to the resource reservation indication of the next transport block, that is, delay one subframe in the time domain. To ensure that the receiver can correctly receive the next transport block (first transmission and / or retransmission).
  • the resource reservation indication in the SA may be adjusted, including: reserving the resource location of the next transport block (refer to Table 2) The resource reservation is incremented by one, and the time interval between the initial transmission and the retransmission of the next transport block (refer to the Time gap in Table 2) is incremented by one.
  • the receiving end detects that the first transmission of the first signal uses the reserved subframe, the resource reservation of the next transport block may be added according to the adjusted resource reservation indication in the SA. The adjustment also adds 1 to the time interval between the initial transmission and the retransmission of the next transport block, so that the receiving end can correctly receive the next transport block for the first transmission and the retransmission.
  • the resource reservation indication in the SA may be adjusted, including: reserving the resource location of the next transport block (refer to Table 2) Resource reservation in ) plus 1.
  • the resource reservation of the next transport block may be added according to the adjusted resource reservation indication in the SA. The adjustment is such that the receiving end can correctly receive the retransmitted next transport block.
  • the terminal may simply specify that when the first transmission or retransmission of a certain transport block of the terminal uses the reserved resource, the terminal needs to Resource reselection for the transmission of the next transport block. That is to say, once the terminal uses the reserved subframe, the terminal does not reserve resources for subsequent transmissions, re-listens the channel and selects resources.
  • Operation 2 The terminal re-proports the logical resource number for the logical subframe in the first resource set and the reserved subframe that can be used to transmit the first signal, to obtain a new logical subframe that can be used for transmitting the first signal. . That is to say, the terminal can use the reserved subframe that can be used to transmit the first signal as a new logical subframe.
  • the manner in which the reserved subframes are distributed in the first resource set may be a centralized distribution manner or a uniform distribution manner.
  • the centralized distribution manner means that all the reserved subframes are consecutively adjacent in the first resource set, and are not interrupted by other types of subframes.
  • Uniform The distribution mode means that in the first resource set, every two reserved subframes are spaced apart by the same number of other types of subframes.
  • the reserved subframes are collectively distributed in the first resource set, which is relatively simple for re-provisioning the logical resource number (refer to operation 2 on the terminal side). However, if the number of reserved subframes is large, such as 76, it will result in a large delay. The reserved sub-frames are evenly distributed in the first resource set, which does not cause a large delay, but increases the difficulty of re-provisioning the logical resource number (refer to operation 2 on the terminal side).
  • a manner in which the reserved subframes are distributed in the first resource set may be determined according to the number of reserved subframes. Specifically, when the number of the reserved subframes is less than a preset number (such as 16), a centralized distribution manner may be adopted, otherwise, a uniform distribution manner is adopted. In this way, the distribution manner of the reserved subframes can be reasonably determined, and the two problems of maximum balance delay and complex resource number can be realized.
  • a preset number such as 16
  • the usage strategies of the two reserved subframes described in the above-mentioned key technical point (2) and the two operations on the terminal side described in the above-mentioned key technical point (3) may be implemented in combination to constitute different embodiments, below.
  • the method of configuring the network device is taken as an example for further description.
  • FIG. 10 is a schematic flowchart diagram of a resource usage method according to an embodiment of the present application.
  • the embodiment of FIG. 10 combines the use strategy 2 in the above-mentioned key technical point (2) and the terminal-side operation 2 in the above-mentioned key technical point (3). The description is expanded below.
  • the base station notifies the terminal by using an enable bit and an offset field in the SIB message (for example, the SIB21): 1. whether the reserved subframe is available; (2) the reserved subframe usage policy ( Offset).
  • the enable bit is an implementation manner of the first indication information, and the offset is used to indicate the first time value.
  • Both enable bit and offset are new domains that are extended in SIB messages (eg, SIB21).
  • the value of the enable bit may indicate that the reserved subframe can be used to transmit the first signal, otherwise, the reserved subframe cannot be used to transmit the first signal.
  • the terminal may use the reserved subframe that can be used to transmit the first signal as a new logical resource, and an original logical resource (in existing standards) Together, define the logical resource number.
  • the terminal including the transmitting end and the receiving end
  • S102 refer to operation 2 on the terminal side in the foregoing key technical point (3), and details are not described herein again.
  • the terminal side may not need to re-create the logical resource number.
  • the terminal determines whether the spacing between the logical subframe and the reserved subframe at the resource location is equal to offset. If yes, execute S104, otherwise execute S105.
  • the logical subframe may be used in association with the reserved subframe, and used together to transmit the first signal.
  • the first signal may be transmitted for the first time by using a logical subframe, and the first signal may be retransmitted by using the reserved subframe.
  • the first signal may be transmitted for the first time by using a reserved subframe, and the first signal may be retransmitted by using a logical subframe.
  • the first transmission and the retransmission of the first signal use the original logical resource.
  • the receiving end receives the first signal and performs signal receiving processing, such as demodulation, multiplexing, and the like.
  • the signal flow diagram corresponding to the method flow shown in FIG. 10 can be as shown in FIG.
  • a new domain is extended in an SIB message (e.g., SIB21).
  • SIB21 e.g., SIB21
  • the new domain may be referred to as a UsingReservedSubframeIndicator field (1 bit).
  • the network device may notify the terminal through the UsingReservedSubframeIndicator field in the SIB message whether the reserved subframe can be used to transmit the first signal and the usage policy of the reserved subframe. That is to say, the enable bit and offset in the embodiment of FIG. 10 can be combined into one indication information.
  • the terminal determines the resource location X of the logical subframe plus whether the UsingReservedSubframeIndicator is the resource location of the reserved subframe. If the X+UsingReservedSubframeIndicator is the resource location of the reserved subframe, the first signal is first transmitted by using the logical subframe, and the first signal is retransmitted by using the reserved subframe. If the X+UsingReservedSubframeIndicator is not the resource location of the reserved subframe, the first transmission and retransmission of the first signal use the original logical resource.
  • mapping relationship between the logical subframe used for association and the reserved subframe of the evolution scheme 1 can be as shown in FIG.
  • the base station informs the terminal through an enable bit in the SIB message (for example, SIB21): whether the reserved subframe can be used to transmit the first signal, and if available, through pre-configuration
  • SIB21 an enable bit in the SIB message
  • the offset value indicates how to use the reserved subframe and the logical subframe.
  • the terminal determines whether the resource location X of the logical subframe plus the offset is the resource location of the reserved subframe. If X+offset is the resource location of the reserved subframe, the first signal is first transmitted by using the logical subframe, and the first signal is retransmitted by using the reserved subframe. If X+offset is not the resource location of the reserved subframe, the first transmission and retransmission of the first signal use the original logical resource.
  • the base station notifies the terminal through the offset field in the SIB message (for example, SIB21): whether the reserved subframe can be used to transmit the first signal, and the reserved subframe Use the strategy. That is to say, the enable bit and offset in the embodiment of FIG. 10 can be combined into one indication information.
  • SIB21 SIB21
  • offset not equal to 0 may indicate that the reserved subframe can be used to transmit the first signal
  • the terminal determines whether the resource location X of the logical subframe plus the offset is the resource location of the reserved subframe. If X+offset is the resource location of the reserved subframe, the first signal is first transmitted by using the logical subframe, and the first signal is retransmitted by using the reserved subframe. If X+offset is not the resource location of the reserved subframe, the first transmission and retransmission of the first signal use the original logical resource.
  • whether the reserved subframe can be used for transmitting the first signal may refer to the foregoing.
  • the pre-configuration of the key technology (1) for example, determining whether the reserved subframe can be used for transmitting the first signal according to a geographical location of the terminal or a busyness of the channel, and details are not described herein. If the reserved subframe is used to transmit the first signal, the pre-configured offset value is used, and the terminal may determine, according to the offset value, which logical subframe to use with the reserved subframe.
  • the terminal side operation is the same as the terminal side operation described in the embodiment of Fig. 10.
  • FIG. 13 is a schematic flowchart diagram of a resource usage method according to another embodiment of the present application.
  • the embodiment of FIG. 13 combines the use strategy 2 in the above-mentioned key technical point (2) and the terminal-side operation 1 in the above-mentioned key technical point (3). The description is expanded below.
  • the base station notifies the terminal by using an enable bit and an offset field in the SIB message (for example, the SIB21): 1. whether the reserved subframe is available; (2) the usage policy of the reserved subframe ( Offset).
  • the enable bit is an implementation manner of the first indication information, and the offset is used to indicate the first time value.
  • Both enable bit and offset are new domains that are extended in SIB messages (eg, SIB21).
  • the value of the enable bit may indicate that the reserved subframe can be used to transmit the first signal, otherwise, the reserved subframe cannot be used to transmit the first signal.
  • the terminal determines whether the spacing between the logical subframe and the reserved subframe at the resource location is less than or equal to offset. If yes, S203-S205 is performed, otherwise S206-S207 is performed.
  • S203-S205 If the spacing between the logical subframe and the reserved subframe at the resource location is less than or equal to offset, the association is used.
  • the logical subframe and the reserved subframe are used for transmitting the first signal, and reference may be made to S203. If the transmitting end uses the reserved subframe, the terminal (the transmitting end) may set the reserved bit “UsingReservedIndicator” in the SA to 1 to indicate the use of the reserved subframe by the terminal, and refer to S204. Finally, the receiving end receives the first signal and performs signal receiving processing, such as demodulation, multiplexing, etc., refer to S205.
  • the resource reservation indication in the SA may be adjusted, including: reserving the resource location of the next transport block (refer to Table 2) The resource reservation is incremented by one, and the time interval between the initial transmission and the retransmission of the next transport block (refer to the Time gap in Table 2) is incremented by one.
  • the receiving end detects that the first transmission of the first signal uses the reserved subframe, the resource reservation of the next transport block may be added according to the adjusted resource reservation indication in the SA. The adjustment also adds 1 to the time interval between the initial transmission and the retransmission of the next transport block, so that the receiving end can correctly receive the next transport block for the first transmission and the retransmission.
  • the resource reservation indication in the SA may be adjusted, including: reserving the resource location of the next transport block (refer to Table 2) Resource reservation in ) plus 1.
  • the resource reservation of the next transport block may be added according to the adjusted resource reservation indication in the SA. The adjustment is such that the receiving end can correctly receive the retransmitted next transport block.
  • S206-S207 If the spacing between the logical subframe and the reserved subframe at the resource location is greater than offset, the first transmission and the retransmission of the first signal use the original logical resource. Finally, the receiving end receives the first signal and performs signal receiving processing, such as demodulation, multiplexing, and the like.
  • whether the reserved subframe can be used for transmitting the first signal may refer to the protocol of the foregoing key technology (1).
  • the manner of configuration is determined, for example, according to the geographic location of the terminal or the busyness of the channel, whether the reserved subframe can be used for transmitting the first signal, and details are not described herein. If the reserved subframe is used to transmit the first signal, the pre-configured offset value is used, and the terminal may determine, according to the offset value, which logical subframe to use with the reserved subframe.
  • the terminal side operation is the same as the terminal side operation described in the embodiment of Fig. 13.
  • the implementation of the embodiment of FIG. 13 may be configured by using the SIB signaling or the pre-configured manner of the network device to configure whether the reserved subframe can be used to transmit the first signal and/or the reserved subframe usage policy.
  • the terminal side may indicate the use of the reserved subframe and adjust the resource reservation indication of the next transport block, so that the receiving end can correctly receive the next transport block.
  • the reserved subframe can be effectively utilized for V2X transmission without affecting the existing resource reservation mechanism.
  • FIG. 14 is a schematic flowchart diagram of a resource usage method according to still another embodiment of the present application.
  • the embodiment of FIG. 14 combines the use strategy 1 in the above-mentioned key technical point (2) and the terminal-side operation 1 in the above-mentioned key technical point (3). The description is expanded below.
  • the base station passes the enable bit and the priorization mode domain in the SIB message (for example, SIB21). Knowing the terminal: 1. Whether the reserved subframe is available; (2) the reserved mode of the reserved subframe.
  • the enable bit is an implementation manner of the first indication information, and a priorization mode is used to indicate the priority policy. Both the enable bit and the priorization mode are new domains that are extended in SIB messages (eg, SIB21).
  • the value of the enable bit may indicate that the reserved subframe can be used to transmit the first signal, otherwise, the reserved subframe cannot be used to transmit the first signal.
  • the terminal determines whether it is a high priority terminal configured in the priority policy, for example, a pedestrian terminal. If yes, execute S303-S305; otherwise, execute S307.
  • the terminal If the terminal (the transmitting end) is the high-priority terminal configured in the priority policy, the first signal is preferentially transmitted by using the reserved subframe, and reference may be made to S303. Specifically, the terminal may use the reserved subframe when transmitting for the first time, or use the reserved subframe when retransmitting. If the transmitting end uses the reserved subframe, the terminal (the transmitting end) may set the reserved bit “UsingReservedIndicator” in the SA to 1 to indicate the use of the reserved subframe by the terminal, and refer to S304. Finally, the receiving end receives the first signal and performs signal receiving processing, such as demodulation, multiplexing, etc., refer to S305. For details on how to instruct the terminal to use the reserved subframe, refer to the terminal-side operation 1 in the above-mentioned key technical point (3), and details are not described herein again.
  • the terminal may continue to listen to the channel and select a resource, or perform other operations, which is not limited herein.
  • the signal flow diagram of the embodiment of Fig. 14 can be the same as Fig. 11.
  • whether the reserved subframe can be used for transmitting the first signal may refer to the protocol of the foregoing key technology (1).
  • the manner of configuration is determined, for example, according to the geographic location of the terminal or the busyness of the channel, whether the reserved subframe can be used for transmitting the first signal, and details are not described herein. If the reserved subframe can be used to transmit the first signal, the terminal is indicated by a pre-configured priorirization mode.
  • the terminal side operation is the same as the terminal side operation described in the embodiment of Fig. 14.
  • whether the reserved subframe can be used to transmit the first signal and/or the reserved subframe usage policy may be configured by using SIB signaling or a pre-configured manner of the network device.
  • the terminal side may indicate the use of the reserved subframe and adjust the resource reservation indication of the next transport block, so that the receiving end can correctly receive the next transport block.
  • the reserved subframe can be effectively utilized for V2X transmission without affecting the existing resource reservation mechanism.
  • FIG. 10, FIG. 13, and FIG. 14 respectively show three embodiments of the above-mentioned key technical point two and the above-mentioned key technical point three.
  • the above several key technical points of the present application may be combined into other embodiments, such as the use strategy 1 and the above key technical points in the above-mentioned key technical points (2) (3)
  • the terminal side operation in the second is implemented in combination, and will not be described again here.
  • FIG. 15 is a schematic structural diagram of a network device and a terminal provided by the present application.
  • the network device 30 may be the network device in the foregoing method embodiment, and may be configured to configure whether the reserved subframe can be used to transmit the first signal and the usage policy of the reserved subframe.
  • the terminal 40 may be the terminal in the foregoing method embodiment, and may be configured to use the reserved subframe to transmit the first signal according to a usage policy of the reserved subframe indicated by the network device 30 or protocol pre-configured.
  • the network device 30 may include a processing unit 301 and a communication unit 303. among them:
  • the processing unit 301 is configured to determine, according to a preset trigger condition or other policy, whether the reserved subframe is used to transmit the first signal. For example, the processing unit 301 may determine the value of the enable bit according to a channel busy ratio (CBR). If the value of the CBR exceeds a preset threshold, it may be determined that the reserved subframe can be used to transmit the first signal. .
  • CBR channel busy ratio
  • the processing unit 301 determining whether the reserved subframe can be used for transmitting the first signal reference may be made to the foregoing method embodiments, and details are not described herein.
  • the communication unit 303 is configured to send the first indication information and/or the second indication information to the terminal.
  • the first indication information is used to indicate whether the reserved subframe in the first resource set is used to transmit the first signal
  • the second indication information is used to indicate the usage policy of the reserved subframe.
  • the usage policy may be used to instruct the terminal to transmit the first signal by using the reserved subframe.
  • the first indication information and/or the second indication information may be carried in an SIB message, and reference may be made to the foregoing method embodiments, and details are not described herein.
  • the usage policy of the reserved subframe may refer to the two usage policies described in the foregoing key technical point (2) and the foregoing method embodiments, and details are not described herein.
  • the terminal 40 may include a processing unit 401 and a communication unit 403. among them:
  • the processing unit 401 is configured to determine, according to a trigger condition pre-configured by the protocol, whether the reserved subframe can be used for V2X transmission, without obtaining an indication of the network device 30. For example, when the channel busy ratio (CBR) is above a preset threshold, processing unit 401 can determine that the reserved subframe can be used to transmit V2X data.
  • CBR channel busy ratio
  • processing unit 401 can determine that the reserved subframe can be used to transmit V2X data.
  • the communication unit 403 is configured to transmit the first signal by using the reserved subframe according to a usage policy of the reserved subframe indicated by the network device 30 (through an SIB message) or pre-configured.
  • the communication unit 403 is further configured to receive the first indication information and/or the second indication information that is sent by the network device 30.
  • the first indication information is used to indicate whether the reserved subframe in the first resource set is used to transmit the first signal
  • the second indication information is used to indicate the usage policy of the reserved subframe.
  • the usage policy may be used to instruct the terminal to transmit the first signal by using the reserved subframe.
  • the first indication information and/or the second indication information may be carried in an SIB message, and reference may be made to the foregoing method embodiments, and details are not described herein.
  • the usage policy of the reserved subframe may refer to the two usage policies described in the foregoing key technical point (2) and the foregoing method embodiments, and details are not described herein.
  • the embodiment of the present invention further provides a wireless communication system, which may be the LTE-V system shown in FIG. 2, and may include: a network device and a terminal.
  • the network device may be the network device in the method embodiment corresponding to FIG. 10, FIG. 13, or FIG. 14 respectively, and the terminal may be the terminal in the method embodiment corresponding to FIG. 10, FIG. 13, or FIG.
  • the terminal may be the terminal 10 shown in FIG. 5.
  • the network device may be the base station 20 shown in FIG. 6.
  • the terminal and the network device may also be the terminal 40 and the network device 30 shown in FIG. 15, respectively.
  • the implementation of the embodiment of the present invention improves resource utilization by configuring a usage policy of reserved subframes in a V2X resource pool. Moreover, the use of the reserved subframe does not affect the existing resource reservation mechanism.
  • the program can be stored in a computer readable storage medium, when the program is executed
  • the flow of the method embodiments as described above may be included.
  • the foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé d'utilisation de ressources, un dispositif associé et un système. Le procédé peut comprendre les étapes suivantes : une station de base envoie des premières informations d'indication et/ou des secondes informations d'indication à un terminal, les premières informations d'indication étant utilisées pour indiquer si une sous-trame réservée dans un premier ensemble de ressources peut être utilisée pour transmettre un premier signal, les secondes informations d'indication étant utilisées pour indiquer une politique d'utilisation de la sous-trame réservée ; lorsque la sous-trame réservée dans le premier ensemble de ressources peut être utilisée pour transmettre un premier signal, le terminal transmet, à l'aide de la sous-trame réservée, un premier signal en fonction de la politique d'utilisation de la sous-trame réservée qui est indiquée ou préconfigurée par la station de base. La solution permet d'améliorer le taux d'utilisation des ressources.
PCT/CN2017/073251 2017-01-20 2017-02-10 Procédé d'utilisation de ressources, dispositif associé et système WO2018133133A1 (fr)

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