WO2018133133A1

WO2018133133A1 - Resource usage method, related device and system

Info

Publication number: WO2018133133A1
Application number: PCT/CN2017/073251
Authority: WO
Inventors: 曾勇波; 才宇; 王达; 王键
Original assignee: 华为技术有限公司
Priority date: 2017-01-20
Filing date: 2017-02-10
Publication date: 2018-07-26
Also published as: CN110178404A; CN110178404B

Abstract

Disclosed are a resource usage method, a related device and a system. The method may comprise: a base station sends first indication information and/or second indication information to a terminal, the first indication information being used for indicating whether a reserved subframe in a first resource set can be used for transmitting a first signal, the second indication information being used for indicating a usage policy of the reserved subframe; when the reserved subframe in the first resource set can be used for transmitting a first signal, the terminal transmits, by using the reserved subframe, a first signal according to the usage policy of the reserved subframe that is indicated or pre-configured by the base station. The solution can improve the resource utilization rate.

Description

Resource usage method, related device and system

Technical field

The present application relates to the field of communications technologies, and in particular, to a resource usage method, related apparatus, and system.

Background technique

LTE-V (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). 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.

A terminal in the Internet of Vehicles can send a Sidelink Synchronization Signal (SLSS) for synchronization with other terminals. In the existing LTE-V standard, the period of the SLSS is 160 milliseconds. There are three configurations of the number of SLSS subframes (also referred to as synchronization resources or synchronization subframes, which are used to transmit synchronization signals and broadcast information) in each SLSS transmission period: 0 synchronization resources, 2 synchronization resources, or 3 simultaneous resources. Configuring 0 synchronization resources indicates that the terminal cannot send SLSS.

In the existing LTE-V standard, 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). 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.

Specifically, 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. In Figure 1, the length of the Bitmap is 100, that is, each V2X cycle contains 100 logical subframes. There are three SLSS subframes in each SLSS period. In addition, 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).

It can be understood that 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.

For example, in the SFN/DFN period (including 10240 subframes), when the length of the Bitmap is equal to 16, no matter how many SLSS subframes are configured in one SLSS period, the subframes need not be reserved. Because the length of one SLSS period is 160 milliseconds, the transmission length of one subframe in the LTE system is 1 millisecond. Then, the number of SLSS periods = 10240/160 = 64 (an integer multiple of 16), and the total number of SLSS subframes in the DFN/SFN period is an integer multiple of 16 regardless of how many SLSS subframes are configured in one SLSS period. 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.

For another example, when the Bitmap length is 100 bits, 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长度 Bitmap length	0个同步资源0 sync resources	1个同步资源1 sync resource	2个同步资源2 simultaneous resources	3个同步资源3 simultaneous resources
16比特16 bits	00	00	00	00
20比特20 bits	00	1616	1212	88
100比特100 bits	4040	7676	1212	4848

Table 1

It can be seen that different numbers of reserved subframes need to be configured in the DFN/SFN period in different configurations. If you do not use reserved sub-frames, it will result in wasted resources.

Summary of the invention

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.

In a first aspect, 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.

In a second aspect, 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.

In this application, 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.

By implementing the resource usage method described in the first aspect and the second aspect, the use of the reserved subframe can be implemented to improve resource utilization.

In the present application, 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. In a specific implementation, the network device may carry the first indication information in a system information block (SIB).

Optionally, 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 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 value of the enable bit is determined according to a channel busy ratio (CBR).

Second, the way the protocol is pre-configured

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. In an actual application, 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.

In combination with the foregoing two implementation manners, 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. . In this case, a bit map can be used to indicate which reserved subframes can be used to transmit the first signal. In a specific implementation, the network device may carry the Bitmap in an SIB message for broadcast.

In this application, 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. Specifically, certain types of terminals or certain types of services may be preferentially used by the network device configuration or pre-configured manner.

E.g:

1. 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.

2. 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.

3. 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.

4. In the listening and resource selection process, 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.

5. When transmitting the first signal of high priority, 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.

6. At the time of resource selection, 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. For the description of the resource reservation, please refer to the foregoing content, and details are not described herein again.

It should be noted that the above several examples can be implemented separately. Not limited to the above examples, 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. Specifically, 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. There is a mapping relationship between the reserved subframe and the logical subframe satisfying the condition, which is defined by the preset condition.

Specifically, 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 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].

For the above two usage policies, the usage policy may be indicated by means of network device configuration, or may be specified by a protocol pre-configuration method.

Specifically, if the usage policy is indicated by using a network device configuration manner, the network device may send indication information to the terminal to indicate which usage policy is used by the current system. In the present application, the indication information may be referred to as second indication information. In a specific implementation, 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. 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.

In this application, 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. .

Specifically, 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. In a specific implementation, the usage indication information may be carried in the control information sent by the terminal, for example, in a scheduling indication. Specifically, 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.

In this application, the usage indication information may be used to indicate that the resource reservation of the next transport block is adjusted.

Specifically, if the first transmission of the current transport block uses a reserved subframe, 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. Correspondingly, if 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.

Specifically, if the retransmission of the current transport block uses a reserved subframe, the resource reservation indication in the SA may be adjusted, including: adding a resource reservation position of the next transport block by one. Correspondingly, if 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.

Optionally, in order to prevent the receiving end from being incorrectly parsed due to failure to receive the use indication information, 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.

In this application, 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. In some embodiments of the present application, 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.

In a third aspect, 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.

In a fourth aspect, 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.

In a fifth aspect, a network device is provided, 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.

In a sixth aspect, a terminal is provided, 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.

In a seventh aspect, a communication system is provided, the 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.

In some optional embodiments, 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.

According to an eighth 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.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

1 is a schematic diagram of a V2X resource pool involved in the present application;

2 is a schematic diagram of a scenario of a vehicle networking related to the present application;

3 is a schematic diagram of two LTE-V communication transmission modes involved in the present application;

4 is a schematic diagram of resource reservation 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.

FIG. 8A is a schematic diagram of mapping of a reserved subframe and a logical subframe provided by the present application; FIG.

FIG. 8B is a schematic diagram of mapping of another reserved subframe and a logical subframe provided by the present application; FIG.

9 is a schematic diagram of an adjustment logic sub-number 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;

11 is a schematic diagram of a signal flow provided by the present application;

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.

detailed description

The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

FIG. 2 shows an application scenario of the LTE-V involved in the present application. As shown in FIG. 2, 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.

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.

V2P (vehicle-pedestrian) communication, i.e., vehicle 200, can communicate with pedestrians 300 or non-motor vehicles on the road, such as issuing a safety warning to pedestrians 300.

Not limited to the above, the LTE-V may also include other forms of V2X communication. For example, V2N (Vehicle-To-Network) communication, that is, 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.

Specifically, 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.

Currently, for V2V, LTE-V provides two complementary V2X transmission modes, as shown in (A) and (B) of Figure 3, respectively:

1. For direct communication transmission, refer to (A) in FIG. 3, which may be based on D2D (Device-To-Device) proximity communication service (ProSe, Proximity Services) in the LTE standard. In the specific implementation, the PC5 interface developed by the latest standard can be used to achieve high speed and high density communication. In an environment without LTE network coverage, 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.

2. 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.

It should be noted that the two transmission modes shown in (A) and (B) in FIG. 3 may be implemented separately or in combination, and the present application is not limited thereto.

In the existing LTE-V standard, 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.

In this application, a Transmission Block (TB) is a data packet on a shared channel, and may include a Protocol Data Unit (PDU) of a Medium Access Control (MAC). 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.

In the present application, the V2X data may include a scheduling indication (SA) and data (Data) transmitted in the same transport block (subframe). The scheduling indication (SA) is used to indicate resource reservation for subsequent transmissions. In the existing LTE-V standard, the scheduling indication (SA) includes control information as shown in Table 2:

Table 2

It should be noted that the related information related to the present application in the scheduling indication is only shown in Table 2. For other information included in the scheduling indication, reference may be made to the existing LTE-V standard, and details are not described herein.

Specifically, when performing the indication of the reserved resource, 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. Here, since the scheduling indication (SA) and the data (Data) corresponding to each data (Data) are both transmitted in the same subframe, the scheduling indication (SA) does not need to indicate the time domain location of the data (Data).

For example, as shown in FIG. 4, the transport blocks 1-3 are all retransmitted. The SA of the first transmission of the transport block 1 indicates the resource reservation for the transport block 2, specifically including: the time interval between the transport block 1 and the transport block 2 is 100 ms (ie, Resource reservation=100 ms in Table 2, transmission) 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.

In this application, 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. For details on how to use the reserved subframe, refer to the subsequent embodiments, and details are not described herein.

Referring to Figure 5, there is shown a terminal 10 provided by some embodiments of the present application. The terminal 10 can be implemented as an in-vehicle terminal, a handheld terminal, an infrastructure terminal, or other terminal that supports V2X functions. As shown in FIG. 5, 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. These components can be connected by bus or other means, and FIG. 5 is exemplified by a bus connection. among them:

Communication interface 101 can be used by terminal 10 to communicate with other communication devices, such as V2X terminals or base stations. In a specific implementation, 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. For details, refer to FIG. 3. Not limited to the direct communication interface and the network communication interface, 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. In some embodiments of the present application, the transmitter 106 may include a direct communication transmitter 1061 and a network communication transmitter 1063. Wherein, the direct communication transmitter 1061 can support the terminal 10 to transmit signals to the adjacent V2X terminal, and 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. In some embodiments of the present application, 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, and the network communication receiver 1083 can support the terminal 10 to receive signals transmitted by the base station.

In some embodiments of the present application, transmitter 106 and receiver 108 may be considered a wireless modem. In the terminal 10, the number of the transmitter 106 and the receiver 108 may each be one or more.

In addition to the transmitter 106 and receiver 108 shown in FIG. 5, 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. In a specific implementation, 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. In particular implementations, 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. .

In some embodiments of the present application, 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. For implementation of 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.

It should be noted that 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.

Referring to Figure 6, Figure 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. As shown in FIG. 6, 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. In a specific implementation, 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. Not limited to the wireless communication 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. In some embodiments of the present application, transmitter 207 and receiver 209 can be viewed as a wireless modem. In network device 20, 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. In particular implementations, 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.

In some embodiments of the present application, 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. For implementation of 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. In a specific implementation, 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.

In an embodiment of the invention, 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. .

In a specific implementation, 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.

It should be noted that 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.

Based on the foregoing LTE-V application scenario, the terminal 10, and the network device 20, when the terminal transmits the V2X data, in order to use the reserved subframe in the V2X resource pool to improve the resource utilization, 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.

In addition, if the terminal uses the reserved subframe in the current transmission, 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.

Optionally, in order not to 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.

In this application, a V2X resource pool may be referred to as a first resource set, and V2X data may be referred to as a first signal. Do not Limited to the LTE-V scenario, the same applies to scenarios of future V2X scenarios and other similar resource configurations.

This application can include the following key technical points:

(1) determining whether the reserved subframe can be used to transmit the first signal

Specifically, 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.

A. Ways of configuring network devices

The network device may send indication information to the terminal to indicate whether the reserved subframe can be used to transmit the first signal. In the present application, the indication information may be referred to as first indication information. In a specific implementation, the network device may carry the first indication information in a System Information Block (SIB).

For example, 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. Here, 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). Here, 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.

In some optional embodiments, the partially reserved subframes in the first set of resources may also be used to transmit purposes other than the first signal. In a specific implementation, a bit map may be used to indicate which reserved subframes can be used to transmit the first signal. In a specific implementation, 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. For convenience of distinction, a Bitmap for indicating a logical subframe may be referred to as a first Bitmap, and a Bitmap indicating a reserved subframe that can be used for transmitting the first signal may be referred to as a second Bitmap.

Referring to Table 1, it can be seen that there are many configurations of reserved subframes, and the variation is large. For convenience of indication, 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. In a specific implementation, when the length of the second Bitmap exceeds the number of reserved subframes, 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.

B. Protocol pre-configuration method

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. For example, 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. Optionally, if the terminal is outside the base station signal coverage, 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.

In an actual application, 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.

Specifically, 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.

(2) determining the usage policy of the reserved subframe

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. Specifically, certain types of terminals or certain types of services may be preferentially used by the network device configuration or pre-configured manner. E.g:

2. 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.

6. At the time of resource selection, 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. For the description of the resource reservation, please refer to the foregoing content, and details are not described herein again.

B. Usage Strategy 2: The first signal is transmitted using the reserved subframe and the logical subframe satisfying the condition. Specifically, 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. 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. As shown in FIG. 8, when the position X of the logical subframe on the physical resource and the position (X+offset) of the reserved subframe on the physical resource are offset (ie, the first time value), 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.

It can be understood that, since the physical position of the reserved subframe in the first resource set is known (refer to FIG. 1), 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. As shown in FIG. 9, 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).

It can be understood that, since the physical position of the reserved subframe in the first resource set is known (refer to FIG. 1), 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. In order to be consistent with existing standards, the range of values of the first time value can be defined as [1, 15]. Specifically, 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.

For the two usage policies described in the above-mentioned key technical point (2): 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.

(3) Terminal side operation.

A. 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.

In a specific implementation, the usage indication information may be carried in the control information sent by the terminal, for example, in a scheduling indication. Specifically, 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.

For example, 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. When UsingReservedIndicator=1, it indicates that the terminal uses the reserved subframe, otherwise, the reserved subframe is not used.

Specifically, when the first transmission of the transport block uses a logical subframe, UsingReservedIndicator=1 may indicate that the retransmission of the transport block will use the reserved subframe. When the first transmission of the transport block uses the reserved subframe, UsingReservedIndicator=1 may indicate that the current transmission (ie, the first transmission) of the transport block uses the reserved subframe.

In this application, 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).

Specifically, if the first transmission of the current transport block uses a reserved subframe, 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. Correspondingly, if 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.

Specifically, if the retransmission of the current transport block uses a reserved subframe, 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. Correspondingly, if 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.

Optionally, in order to prevent the receiving end from being incorrectly parsed due to failure to receive the UsingReservedIndicator, 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.

B. 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.

For example, as shown in FIG. 9, the reserved subframe is treated as a new logical subframe, which is numbered together with the existing logical subframe defined in the standard. Adjusted logical number = existing logical number + cumulative number n of reserved sub-frames. It should be noted that both the transmitting terminal and the receiving terminal need to re-create the logical resource number. In this way, the terminal can perform resource reservation according to the existing resource reservation mechanism, and does not need to extend the reserved field in the SA to indicate whether the terminal uses the reserved subframe.

In combination with the above-mentioned key technical points (1) to (3), in the present application, 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. Here, 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.

It can be understood that 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).

In some embodiments of the present application, 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.

In this application, 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.

Referring to FIG. 10, 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.

S101. 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).

Specifically, 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.

S102. If enable bit=1, the terminal (including the transmitting end and the receiving end) 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. For the specific implementation of S102, refer to operation 2 on the terminal side in the foregoing key technical point (3), and details are not described herein again.

Optionally, if the terminal is configured to perform resource reselection after using the reserved subframe, the terminal side may not need to re-create the logical resource number.

S103. 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.

S104. If the spacing between the logical subframe and the reserved subframe at the resource location is equal to offset, the logical subframe may be used in association with the reserved subframe, and used together to transmit the first signal. Optionally, 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. Optionally, 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.

S105. If the spacing between the logical subframe and the reserved subframe at the resource location is not equal to the offset, the first transmission and the retransmission of the first signal use the original logical resource.

S106-S107. Finally, 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.

Several evolutions of the embodiment of Figure 10 are described below.

Evolution plan one

(1) The difference from the embodiment of Fig. 10 is that a new domain is extended in an SIB message (e.g., SIB21). For convenience of description, 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.

Specifically, UsingReservedSubframeIndicator=0 may indicate that the reserved subframe cannot be used to transmit the first signal. UsingReservedSubframeIndicator=1 may indicate that a reserved subframe and a logical subframe that are closely adjacent at a physical resource location may be paired, as the logical subframe and the reserved subframe satisfying the preset condition, together for the first Signal transmission.

(2) Similar to the embodiment of Fig. 10 is:

A. 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.

B. On the terminal side: if UsingReservedSubframeIndicator=1, the terminal (including the transmitting end and the receiving end) can treat the reserved subframe that can be used for transmitting the first signal as a new logical resource, and the original logical resource (now With the definitions in the standard), re-do the logical resource number.

The mapping relationship between the logical subframe used for association and the reserved subframe of the evolution scheme 1 can be as shown in FIG.

Evolution plan two

(1) The difference from the embodiment of FIG. 10 is that 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 The offset value indicates how to use the reserved subframe and the logical subframe.

(2) Similar to the embodiment of Fig. 10 is:

A. 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.

B. On the terminal side: If enable bit=1, the terminal (including the sender and the receiver) can use the reserved subframe that can be used to transmit the first signal as a new logical resource, and the original logical resource ( Together with the existing standards, the logical resource number is re-executed.

Evolution plan three

(1) The difference from the embodiment of FIG. 10 is that 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.

Specifically, offset=0 may indicate that the reserved subframe cannot be used to transmit the first signal, and offset not equal to 0 may indicate that the reserved subframe can be used to transmit the first signal.

(2) Similar to the embodiment of Fig. 10 is:

It should be noted that the signal flow diagrams of the above several evolution schemes of the embodiment of FIG. 10 are the same as those of FIG.

In the embodiment of FIG. 10 and the evolution of the embodiment of FIG. 10, if a pre-configured manner is adopted instead of a network device configuration manner, 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.

Implementing the embodiment of FIG. 10 and the evolution of the embodiment of FIG. 10, whether the reserved subframe can be used to transmit the first signal and/or the method may be configured by SIB signaling or a pre-configured manner of network device configuration. Keep the usage policy of the sub-frame. The terminal side simply re-edits the logical resource number. By combining the use strategy 2 in the above key technical point (2) and the terminal side operation 2 in the above key technical point (3), the reserved subframe can be effectively utilized for V2X transmission, and the impact on the existing standard is small, and the implementation is achieved. simple.

Referring to FIG. 13, 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.

S201, 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).

S202. 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.

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.

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.

It should be noted that the signal flow diagram of the embodiment of FIG. 13 can be the same as FIG.

In the embodiment of FIG. 13, if the pre-configured mode is adopted instead of the network device configuration mode, 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.

Referring to FIG. 14, 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.

S301. 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).

S302: The terminal (the transmitting end) 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.

S303-S305: 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.

S306. If the terminal (the transmitting end) is not the high-priority terminal configured in the priority policy, 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.

In the embodiment of FIG. 14, if the pre-configured mode is adopted instead of the network device configuration mode, 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.

To implement 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.

It should be noted that 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. In practical applications, not limited to the above three embodiments, 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.

Referring to FIG. 15, 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.

First, as shown in FIG. 15, 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. . For a specific implementation of 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, and 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. In a specific implementation, 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.

In this application, 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.

It can be understood that the specific implementations of the various functional units included in the network device 30 may refer to the foregoing key technical points (1) to (3), or the corresponding method embodiments in FIG. 10, FIG. 13, or FIG. .

Next, as shown in FIG. 15, 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. For a specific implementation of 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 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.

Optionally, 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, and 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. In a specific implementation, 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.

It is to be understood that the specific implementations of the various functional units included in the terminal 40 may be referred to the foregoing key technical points (1) to (3), or the corresponding method embodiments in FIG. 10, FIG. 13, or FIG.

In addition, 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.

In a specific implementation, 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.

For specific implementations of the network device and the terminal, reference may be made to the foregoing key technical points (1) to (3), or the method embodiments corresponding to FIG. 10, FIG. 13 or FIG. 14 respectively, and details are not described herein again.

In summary, 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.

One of ordinary skill in the art can understand all or part of the process of implementing the above embodiments, which can be completed by a computer program to instruct related hardware, 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.

Claims

A method for using a resource, comprising:

The network device sends the first indication information and/or the second indication information to the terminal, where the first indication information is used to indicate whether the reserved subframe in the first resource set is used to transmit the first signal, where the second The indication information is used to indicate a usage policy of the reserved subframe; the usage policy is used to instruct the terminal to transmit the first signal by using the reserved subframe.
The method of claim 1 further comprising: said network device configuring a reserved subframe in said first set of resources to be operable to transmit said first signal and to said said first The indication information is set to a first value; the first indication information set to the first value is used to indicate that the reserved subframe can be used to transmit the first signal.
The method of claim 1, further comprising: determining, by the network device, whether a channel congestion level exceeds a preset threshold, and if so, configuring the reserved subframe in the first resource set to be operable Transmitting the first signal, and setting the first indication information to a first value; the first indication information set to the first value is used to indicate that the reserved subframe can be used to transmit the The first signal.
The method according to any one of claims 1 to 3, wherein the second indication information is used to indicate that the usage policy of the reserved subframe is a priority policy, and the terminal configured as a high priority takes precedence. Transmitting the first signal with the reserved subframe.
The method of claim 4 wherein said priority policy comprises at least one of the following:

A terminal having a low transmission power is configured to preferentially use the reserved subframe; or

A terminal adopting a random resource selection manner is configured to preferentially use the reserved subframe; or

The terminal that does not retransmit the first signal is configured to preferentially use the reserved subframe; or

In the process of listening and resource selection, a terminal that does not select a suitable resource is configured to preferentially use the reserved subframe; or

When transmitting the first signal of high priority, the terminal is configured to preferentially use the reserved subframe; or

At the time of resource selection, a terminal that does not perform resource reservation is configured to preferentially use the reserved subframe.
The method according to any one of claims 1 to 3, wherein the first resource set further comprises a logical subframe, and the logical subframe is used for transmitting the first signal;

The second indication information includes a first time value, where the usage policy of the reserved subframe is used to transmit the first signal by using a reserved subframe and a logical subframe satisfying a condition; the satisfaction condition is that the reserved subframe is a reserved subframe. The spacing between the logical subframe and the logical subframe meets a preset condition; the preset condition includes: less than or equal to the first time value, or equal to one of the first time values.
The method of any of claims 1-6, further comprising: the network device indicating, by bit mapping, a reservation in the first set of resources that can be used to transmit the first signal Subframe.
The method according to any one of claims 1 to 7, wherein the network device determines a distribution manner of the reserved subframes in the first resource set according to the number of reserved subframes.
A method for using a resource, comprising:

When the reserved subframe in the first resource set can be used to transmit the first signal, the terminal transmits the first signal by using the reserved subframe according to the usage policy of the reserved subframe indicated by the network device or pre-configured .
The method according to claim 9, wherein if the usage policy of the reserved subframe is a priority policy, the terminal utilizes the usage policy of the reserved subframe indicated by the network device or pre-configured. Transmitting the first signal by the reserved subframe includes: if the terminal is a high priority terminal configured in the priority policy, the terminal preferentially uses the reserved subframe to transmit the first signal.
The method according to claim 9, wherein the first resource set further comprises a logical subframe, the logical subframe is used for transmitting the first signal; if the reserved subframe usage policy is utilized The reserved subframe and the logical subframe satisfying the condition transmit the first signal; the spacing between the reserved subframe and the logical subframe satisfying the condition at the resource location is equal to the first time value;

And transmitting, by the terminal, the first signal by using the reserved subframe according to the usage policy of the reserved subframe that is indicated by the network device or the pre-configured subframe, where the terminal uses the reserved subframe that satisfies the condition and The logical sub-frame transmits the first signal.
The method according to claim 9, wherein the first resource set further comprises a logical subframe, the logical subframe is used for transmitting the first signal; if the reserved subframe usage policy is utilized The reserved subframe and the logical subframe satisfying the condition transmit the first signal; the spacing between the reserved subframe and the logical subframe satisfying the condition at the resource location is less than or equal to the first time value;

And transmitting, by the terminal, the first signal by using the reserved subframe according to the usage policy of the reserved subframe that is indicated by the network device or the pre-configured subframe, where the terminal uses the reserved subframe that satisfies the condition and The logical sub-frame transmits the first signal.
The method according to any one of claims 9 to 12, further comprising: the terminal transmitting usage indication information about the reserved subframe, the usage indication information being used to indicate whether the terminal uses the Keep sub-frames.
The method according to claim 13, wherein said usage indication information is carried in control information transmitted by said terminal.
The method according to claim 14, wherein the use indication information is used to indicate that the resource reservation of the next transport block is adjusted; and further comprising: if the initial transmission of the current transport block uses a reserved subframe, The resource reservation position of the next transport block is incremented by one, and the time interval between the initial transmission and the retransmission of the next transport block is incremented by one; if the retransmission of the current transport block uses a reserved subframe, The resource reservation position of the next transport block is incremented by one.
The method according to any one of claims 9 to 12, further comprising: said terminal for a logical subframe in said first set of resources and a reserved sub-capture capable of transmitting said first signal The frame re-executes the logical resource number to obtain a new logical subframe that can be used to transmit the first signal.
The method of any of claims 9-16, further comprising:

When the first indication information acquired by the terminal is a first value, the terminal determines that the reserved subframe can be used to transmit the first signal; the first indication information is used to indicate the first resource. Whether the reserved subframe in the set can be used to transmit the first signal; or,

If the reserved subframe is preconfigured to allow for transmitting the first signal, the terminal determines that the reserved subframe can be used to transmit the first signal.
The method of any of claims 9-16, further comprising:

If the terminal is outside the coverage of the network device signal, the terminal determines that the reserved subframe can be used to transmit the first signal.
The method of any of claims 9-16, further comprising:

If the degree of channel congestion is greater than a preset threshold, the terminal determines that the reserved subframe can be used to transmit the first signal.
A network device, comprising: a transmitter and a processor, wherein:

The processor is configured to configure the first indication information and/or the second indication information, where the first indication information is used to indicate 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 transmits the first signal by using the reserved subframe;

The transmitter is configured to send the first indication information and/or the second indication information to a terminal.
The network device according to claim 20, wherein said processor is configured to configure a reserved subframe in said first resource set to be operable to transmit said first signal, and to said said first indication The information is set to a first value; the first indication information set to the first value is used to indicate that the reserved subframe can be used to transmit the first signal.
The network device according to claim 20, wherein the processor is configured to determine whether a channel congestion degree exceeds a preset threshold, and if yes, configure a reserved subframe in the first resource set to be applicable to Transmitting the first signal, and setting the first indication information to a first value; the first indication information set to the first value is used to indicate that the reserved subframe can be used to transmit the first a signal.
The network device according to any one of claims 20 to 22, wherein the second indication information is used to indicate that the usage policy of the reserved subframe is a priority policy, and is configured as a high priority terminal. The first signal is transmitted using the reserved subframe preferentially.
The network device according to claim 23, wherein the priority policy comprises at least one of the following:

A terminal having a low transmission power is configured to preferentially use the reserved subframe; or

A terminal adopting a random resource selection manner is configured to preferentially use the reserved subframe; or

The terminal that does not retransmit the first signal is configured to preferentially use the reserved subframe; or

In the process of listening and resource selection, a terminal that does not select a suitable resource is configured to preferentially use the reserved subframe; or

When transmitting the first signal of high priority, the terminal is configured to preferentially use the reserved subframe; or

At the time of resource selection, a terminal that does not perform resource reservation is configured to preferentially use the reserved subframe.
The network device according to any one of claims 20 to 22, wherein the first resource set further includes a logical subframe, and the logical subframe is used to transmit the first signal;

The second indication information includes a first time value, where the usage policy of the reserved subframe is used to transmit the first signal by using a reserved subframe and a logical subframe satisfying a condition; the satisfaction condition is that the reserved subframe is a reserved subframe. The spacing between the logical subframe and the logical subframe meets a preset condition; the preset condition includes: less than or equal to the first time value, or equal to one of the first time values.
The network device according to any one of claims 20 to 25, wherein the processor is further configured to indicate, by using a bit mapping, a capability of the first resource set to be used for transmitting the first signal. Keep sub-frames.
The network device according to any one of claims 20 to 26, wherein the processor is further configured to determine, according to the number of reserved subframes, the reserved subframe in the first resource set. Distribution method.
A terminal, comprising: a receiver, a transmitter, and a processor, wherein:

The processor is configured to determine whether a reserved subframe in the first resource set is used to transmit the first signal;

The receiver is configured to receive a usage policy of the reserved subframe indicated by the network device;

The transmitter is configured to: when the reserved subframe in the first resource set can be used to transmit a first signal, according to the reserved indicator that is received or pre-configured by the network device received by the receiver a usage policy of the frame, using the reserved subframe to transmit the first signal.
The terminal according to claim 28, wherein the usage policy of the reserved subframe is a priority policy; and the transmitter is specifically configured to: if the terminal is a high priority terminal configured in the priority policy, The first signal is transmitted using the reserved subframe preferentially.
The terminal according to claim 28, wherein the first resource set further comprises a logical subframe, the logical subframe is used for transmitting the first signal; and the usage policy of the reserved subframe is utilized The conditional reserved subframe and the logical subframe transmit the first signal; the spacing between the reserved subframe and the logical subframe satisfying the condition at the resource location is equal to the first time value; the transmitter is specifically configured to utilize the Retaining sub-frames and logical sub-frames that satisfy the condition The first signal.
The terminal according to claim 28, wherein the first resource set further comprises a logical subframe, the logical subframe is used to transmit the first signal; if the reserved subframe usage policy is utilized The reserved subframe and the logical subframe satisfying the condition transmit the first signal; the spacing between the reserved subframe and the logical subframe satisfying the condition at the resource location is less than or equal to the first time value; the transmitter is specifically used to utilize The reserved subframe and the logical subframe satisfying the condition transmit the first signal.
The terminal according to any one of claims 28 to 31, wherein the transmitter is further configured to send usage indication information about the reserved subframe, where the usage indication information is used to indicate whether the terminal uses the Retain the sub-frame.
The terminal according to claim 32, wherein the usage indication information is carried in control information sent by the terminal.
The terminal according to claim 33, wherein the use indication information is used to indicate that a resource reservation of a next transport block is adjusted; and the processor is further configured to use a reserved sub-for the initial transmission of the current transport block. Frame, adding 1 to the resource reservation position of the next transport block, and adding 1 to the time interval between the initial transmission and the retransmission of the next transport block; if the retransmission of the current transport block uses a reservation Subframe, then the resource reservation position of the next transport block is incremented by one.
The terminal according to any one of claims 28 to 31, wherein the processor is further configured to: for a logical subframe in the first resource set and to be used for transmitting the first signal Retaining the subframe re-provisions the logical resource number to obtain a new logical subframe that can be used to transmit the first signal.
The terminal according to any one of claims 28 to 35, wherein the processor is specifically configured to: when the first indication information acquired by the terminal is a first value, the terminal determines the The reserved subframe can be used to transmit the first signal; the first indication information is used to indicate whether a reserved subframe in the first resource set can be used to transmit the first signal; or if the reservation The subframe is preconfigured to allow for transmitting the first signal, and then the reserved subframe is determined to be capable of transmitting the first signal.
The terminal according to any one of claims 28 to 35, wherein the processor is specifically configured to: if the terminal is outside a network device signal coverage, determine that the reserved subframe can be used for transmission The first signal.
The terminal according to any one of claims 28 to 35, wherein the processor is specifically configured to: if the channel congestion degree is greater than a preset threshold, the terminal determines that the reserved subframe can be used for transmission The first signal.
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 the first signal, And a usage policy of the reserved subframe;

The terminal is configured to use the reserved subframe to transmit the reserved subframe according to a usage policy of the reserved subframe indicated by the base station or when the reserved subframe in the first resource set can be used to transmit the first signal. The first signal.
A communication system according to claim 39, comprising: said network device being the network device according to any one of claims 21-27; said terminal being any one of claims 29-38 Terminal