WO2020221070A1

WO2020221070A1 - Congestion control method and device

Info

Publication number: WO2020221070A1
Application number: PCT/CN2020/085970
Authority: WO
Inventors: 刘哲; 黎超; 张兴炜
Original assignee: 华为技术有限公司
Priority date: 2019-04-30
Filing date: 2020-04-21
Publication date: 2020-11-05
Also published as: CN111866944B; CN111866944A

Abstract

Provided are a congestion control method and device, relating to the field of wireless communications. If a resource associated with a second resource allocation means exists in a resource pool, a terminal device can acquire, according to congestion state information, a first resource for sending a data packet to be transmitted of the terminal device, such that the case of packet loss or errors in data packet reception can be reduced, thereby improving the communication quality and user experience thereof.

Description

Congestion control method and equipment

"This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on April 30, 2019, the application number is 201910364439.5, and the invention title is "Congestion Control Method and Equipment", the entire content of which is incorporated into this application by reference ".

Technical field

This application relates to the field of wireless communication, and in particular to a congestion control method and device.

Background technique

In the Rel-14, Rel-15 and Rel-16 versions of the "Third Generation Partnership Program", the Internet of Vehicles (vehicle to everything, V2X) has been successfully established as a major application of the device to device (D2D) technology . V2X is for side link communication, that is, direct communication between the sending terminal and the receiving terminal. V2X will optimize the specific application requirements of V2X on the basis of the existing D2D technology, further reduce the access delay of V2X devices and solve the problem of resource conflicts.

The side link resource allocation methods include mode 1 and mode 2, where mode 1 configures resources for the sending terminal by the network device, and mode 2 does not require network device control and selects resources for the sending terminal. If resources are reserved in the shared resource pool for the terminal device that uses mode 1 to obtain resources and/or the terminal device that uses mode 2 to obtain resources, the resources of the terminal device that uses mode 1 (or mode 2) to obtain resources When in a congested state, terminal devices that use mode 1 (or mode 2) to obtain resources continue to send data packets on the resources in the congested state, and packet loss or data packet reception errors or large data packet transmission delays may occur. This leads to poor communication quality and affects user experience.

Summary of the invention

The embodiments of the present application provide a congestion control method and device, which can reduce packet loss or data packet reception errors, and can ensure the transmission delay of data packets, thereby improving communication quality and improving user experience.

In order to achieve the foregoing objectives, the embodiments of the present application adopt the following technical solutions:

In a first aspect, an embodiment of the present application provides a congestion control method. The method includes: a terminal device obtains congestion state information, wherein the terminal device adopts a first resource allocation method, and the congestion state information is used to indicate that the terminal device is available for use The congestion state of the resource of the terminal device, the resources available for the terminal device include the resource associated with the first resource allocation method; the terminal device obtains the first resource according to the congestion state information, where the first resource is used to send the terminal device’s Data packets to be transmitted.

Based on the above technical solution, the terminal device can obtain the first resource used to send the data packet to be transmitted of the terminal device according to the congestion status information. Therefore, the terminal device can reduce packet loss or data packet reception errors, thereby improving Communication quality and improve user experience.

In a possible implementation manner, if the congestion state information is greater than or equal to a first threshold, the first resource includes resources associated with a second resource allocation manner, and the second resource allocation manner is different from the first resource allocation manner; If the congestion state information is less than the first threshold, the first resource includes the resource associated with the first resource allocation method. Based on this solution, when the congestion status information is greater than or equal to the first threshold, the terminal device can send data packets to be transmitted through the resources associated with the second resource allocation method, and when the congestion status information is less than the first threshold, use the first resource allocation method The associated resource sends the data packet to be transmitted.

In a possible implementation manner, if the congestion state information is greater than or equal to the first threshold, the terminal device switches from adopting the first resource allocation manner to adopting the second resource allocation manner. Based on this solution, the terminal device can switch from adopting the first resource allocation method to adopting the second resource allocation method when the congestion status information is greater than or equal to the first threshold. Therefore, the terminal device can reduce packet loss or packet receiving errors. Circumstances, which can improve communication quality and enhance user experience.

In a possible implementation manner, the congestion state information includes a channel congestion rate; or, the congestion state information includes a channel occupancy rate. Based on this solution, the terminal device can obtain the first resource for sending the data packet to be transmitted of the terminal device according to the channel congestion rate or the channel occupancy rate. Therefore, the terminal device can reduce packet loss or data packet reception errors. This can improve communication quality and enhance user experience.

In a possible implementation manner, the terminal device acquiring the congestion status information includes: the terminal device acquiring the congestion status information of each time slot within a measurement window length; wherein, the measurement window length includes one or more Time slot; the terminal device obtains the congestion status information according to the congestion status information of each time slot. Based on this solution, the terminal device can obtain the congestion state information according to the congestion state information of each time slot, and according to the congestion state information, obtain the first resource used to send the data packet to be transmitted by the terminal device. Therefore, the terminal device can Reduce packet loss or data packet reception errors, thereby improving communication quality and improving user experience.

In a possible implementation, when the congestion state information includes the channel congestion rate, for any time slot within the measurement window, the terminal device obtains the channel congestion rate of any time slot, including: the terminal According to the number of sub-channels received by the side link signal strength indicator of the sub-channels that can be used by the terminal device in any one of the time slots, the number of sub-channels that are greater than or equal to the second threshold, and the number of sub-channels included in any one of the time slots The total number and the number of subchannels associated with the second resource allocation mode in any time slot are used to obtain the channel congestion rate of any time slot. Based on this solution, the terminal equipment can indicate the number of sub-channels that are greater than or equal to the second threshold according to the sub-channels that can be used by the terminal equipment in any time slot. The total number of sub-channels and the number of sub-channels associated with the second resource allocation method in any time slot, obtain the channel congestion rate of any time slot, and obtain the channel according to the channel congestion rate of each time slot The congestion rate, and then according to the channel congestion rate, obtain the first resource used to send the data packet to be transmitted by the terminal device. Therefore, the terminal device can reduce packet loss or data packet reception errors, thereby improving communication quality, and Improve user experience.

In a possible implementation manner, when the congestion state information includes the channel occupancy rate, for any time slot within the measurement window length, the terminal device obtains the channel occupancy rate of any time slot, including: the terminal The device according to the number of occupied sub-channels in the sub-channels that can be used by the terminal device in any one time slot, the total number of sub-channels included in any one time slot, and the number of sub-channels in any one time slot The number of sub-channels associated with the second resource allocation method is used to obtain the channel occupancy rate of any time slot. Based on this scheme, the terminal equipment is based on the number of occupied sub-channels in the sub-channels available to the terminal equipment in any time slot, the total number of sub-channels included in any time slot, and the number of sub-channels in any time slot. The number of sub-channels associated with the second resource allocation method, the channel occupancy rate of any time slot is obtained, and the channel occupancy rate is obtained according to the channel occupancy rate of each time slot, and then the channel occupancy rate is used to obtain the terminal The device is the first resource of the data packet to be transmitted. Therefore, the terminal device can reduce packet loss or data packet reception errors, thereby improving communication quality and improving user experience.

In a possible implementation manner, the terminal device obtains the measurement window length according to the service quality parameter of the data packet to be transmitted, the measurement window length, and the service quality parameter of the data packet to be transmitted. Based on this solution, the terminal device can obtain the measurement window length according to the service quality parameter of the data packet to be transmitted, the corresponding relationship between the measurement window length and the service quality parameter of the data packet to be transmitted.

In a possible implementation, the measurement window length includes a short-term measurement window length and a long-term measurement window length. The terminal device is based on the service quality parameter of the data packet to be transmitted, and the measurement window length corresponds to the service quality parameter of the data packet to be transmitted Relationship, acquiring the measurement window length includes: when the service quality parameter of the data packet to be transmitted is greater than or equal to the third threshold, the terminal device uses the short-term measurement window length as the measurement window length; or, when the data packet to be transmitted If the service quality parameter of is less than the third threshold, the terminal device uses the long-term measurement window length as the measurement window length. Based on this solution, the terminal device can use the short-term measurement window length as the measurement window length when the service quality parameter of the data packet to be transmitted is greater than or equal to the third threshold; or, when the service quality parameter of the data packet to be transmitted is less than the third threshold , The long-term measurement window length is taken as the measurement window length.

In a possible implementation manner, the measurement window length includes measurement window lengths of various lengths, and the terminal device according to the service quality parameter of the data packet to be transmitted, the corresponding relationship between the measurement window length and the service quality parameter of the data packet to be transmitted, Obtaining the measurement window length includes: the terminal device obtains the measurement window according to the level of the service quality parameter of the data packet to be transmitted, the corresponding relationship between the measurement window lengths of various lengths and the level of the service quality parameter of the data packet to be transmitted long. Based on this solution, the terminal device can obtain the measurement window length according to the level of the service quality parameter of the data packet to be transmitted, the measurement window length of various lengths, and the level of the service quality parameter of the data packet to be transmitted.

In a possible implementation manner, the congestion state information includes the channel congestion rate, and the terminal device acquiring the first resource according to the congestion state information includes: if the channel congestion rate is greater than or equal to a fourth threshold, the terminal device acquires The quality of service parameter of the data packet to be transmitted; among the resources associated with the second resource allocation method by the terminal device, the resource whose quality of service parameter is less than or equal to the quality of service parameter of the data packet to be transmitted is used as the first resource, and the second resource The resource allocation method is different from the first resource allocation method. Based on this solution, when the channel congestion rate is greater than or equal to the fourth threshold, the terminal device can use the resource associated with the second resource allocation method of the data packet to be transmitted as the first resource when the quality of service parameter is less than or equal to.

In a possible implementation manner, the first resource allocation manner includes: the network device configures resources for the terminal device, and the second resource allocation manner includes: the terminal device selects resources; or, the first resource allocation manner includes : The terminal device selects a resource, and the second resource allocation method includes: the network device configures the resource for the terminal device. Based on this solution, the first resource allocation method and the second resource allocation method are further described.

In the second aspect, embodiments of the present application provide a terminal device, which has the method and function described in the first aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a third aspect, the present application provides a communication device, which may include: at least one processor, and related program instructions are executed in the at least one processor to implement the method according to the first aspect and any design thereof The function of the terminal device in the. Optionally, the communication device may further include at least one memory, and the memory stores related program instructions. The communication device may be the method of the first aspect and the terminal device in any design thereof.

In a fourth aspect, the present application provides a system chip that can be used in a communication device. The system chip includes: at least one processor, and related program instructions are executed in the at least one processor to implement The method on the one hand and the function of the terminal device in any design. Optionally, the system chip may also include at least one memory, and the memory stores related program instructions.

In the fifth aspect, the present application provides a computer storage medium that can be used in a communication device, and the computer-readable storage medium stores program instructions when the program instructions are run to implement the The method and the function of the terminal equipment in any design.

In the sixth aspect, the present application provides a computer program product, which contains program instructions, and when the program instructions involved are executed, the method according to the first aspect and the function of the terminal device in any design thereof are realized.

In the seventh aspect, the present application provides a communication system, which may include any one or more of the following: such as the terminal device in the second aspect, or the communication device in the third aspect, or the fourth aspect The system chip in, or the computer storage medium in the fifth aspect, or the computer program product in the sixth aspect.

It can be understood that any of the above-provided devices, system chips, computer storage media, computer program products, or communication systems are all used to implement the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can be referred to The beneficial effects of the corresponding method will not be repeated here.

Description of the drawings

FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the application;

Figure 2 is a schematic diagram of a resource pool provided by an embodiment of the application;

3 is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application;

FIG. 4 is a first schematic flowchart of a congestion control method provided by an embodiment of this application;

FIG. 5 is a second schematic flowchart of a congestion control method provided by an embodiment of this application;

FIG. 6 is a third schematic flowchart of a congestion control method provided by an embodiment of this application;

FIG. 7 is a fourth flowchart of a congestion control method provided by an embodiment of this application;

FIG. 8 is a fifth schematic flowchart of a congestion control method provided by an embodiment of this application;

FIG. 9 is a first structural diagram of a terminal device provided by an embodiment of this application;

FIG. 10 is a second structural diagram of a terminal device provided by an embodiment of this application.

Detailed ways

The implementation manners of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The method provided in the embodiments of this application can be used in any communication system that supports V2X communication. The communication system can be a 3rd generation partnership project (3GPP) communication system, for example, long term evolution (LTE). ) The system can also be a fifth generation (5th generation, 5G) mobile communication system, an NR system, and other next-generation communication systems, or a non-3GPP communication system, without limitation. The following only uses the communication system 100 shown in FIG. 1 as an example to describe the method provided in the embodiment of the present application.

As shown in FIG. 1, it is a schematic diagram of the architecture of a communication system 100 provided by an embodiment of this application. In FIG. 1, the communication system 100 may include multiple network devices and multiple terminal devices, for example, may include

network devices

101 and 102, and terminal device 103-terminal device 109.

In Figure 1, a network device can provide wireless access services for terminal devices. Specifically, each network device corresponds to a service coverage area, and terminal devices that enter this area can communicate with the network device through the Uu port to receive wireless access services provided by the network device. The terminal equipment and the network equipment can communicate through the Uu port link. Among them, the Uu port link can be divided into uplink (UL) and downlink (DL) according to the direction of the data transmitted on it. The UL can transmit data sent from terminal equipment to network equipment, DL It can transmit data from network equipment to terminal equipment. For example, in FIG. 1, the terminal device 103 is located in the coverage area of the network device 101, the network device 101 can send data to the terminal device 103 via DL, and the terminal device 103 can send data to the network device 101 via UL.

Terminal devices and other terminal devices can communicate with each other through direct communication links. For example, terminal devices and other terminal devices can perform unicast communication, broadcast communication, or multicast communication through direct communication links. Wherein, the directly connected communication link may be called a side link or a side link (SL). For example, taking the direct communication link as the side link as an example, the terminal device 103 and the terminal device 104 in Figure 1 can perform unicast communication through the side link, and the terminal device 105 can communicate with the terminal device 106 to the terminal device 109. Multicast communication can be carried out through the side link.

The network device in FIG. 1, for example, the network device 101 or the network device 102 may be a transmission reception point (TRP), a base station, a relay station, or an access point. The network equipment 101 or the network equipment 102 can be the network equipment in the 5G communication system or the network equipment in the future evolution network, and it can also be: global system for mobile communication (GSM) or code division multiple access (code division multiple access) The base transceiver station (BTS) in multiple access (CDMA) networks can also be the NB (NodeB) in wideband code division multiple access (WCDMA), or it can be a long-term evolution ( eNB or eNodeB (evolutional NodeB) in long term evolution, LTE. The network device 101 or the network device 102 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario.

The terminal device in FIG. 1, such as the terminal device 103-the terminal device 109, may be devices that include wireless transceiver functions and can provide communication services for users. Specifically, the terminal device 103-terminal device 109 may be a device in a V2X system, a device in a D2D system, a device in a machine type communication (MTC) system, and the like. For example, terminal equipment 103-terminal equipment 109 may refer to industrial robots, industrial automation equipment, user equipment (UE), access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile Device, user terminal, terminal, wireless terminal device, user agent or user device. For example, the terminal device 103-terminal device 109 may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, and a personal digital assistant (personal digital assistant, PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or networks after 5G or terminal devices in future evolution networks, This application does not limit this. The terminal device 103-terminal device 109 may also be an on-board module, on-board module, on-board component, on-board chip, or on-board unit built into the vehicle as one or more components or units. The vehicle passes through the built-in on-board module, on-board module, The vehicle-mounted component, the vehicle-mounted chip, or the vehicle-mounted unit may implement the congestion control method provided in the following embodiments of the present application.

It should be noted that the communication system 100 shown in FIG. 1 is only used as an example and is not used to limit the technical solution of the present application. Those skilled in the art should understand that in a specific implementation process, the communication system 100 may also include other devices, and the number of network devices and terminal devices may also be determined according to specific needs. In addition, the network elements in Figure 1 can also be connected through other interfaces, which are not limited.

In the process of side link communication between the terminal device and other terminal devices, the first resource allocation method and the second resource allocation method can be used to allocate resources to the terminal device, so that the terminal device can perform side travel with other terminal devices on the allocated resources. Link communication. Among them, the first resource allocation method may include the network device to allocate resources to the terminal device (ie mode 1), and the second resource allocation method may include the terminal device to select resources (ie mode 2); or, the first resource allocation method It may include the resource selection by the terminal device (that is, mode 2), and the second resource allocation method may include the network device allocating resources for the terminal device (that is, the mode 1).

The resource pool may have resources reserved for terminal devices that use the first resource allocation method to obtain resources; or, the resource pool may include resources reserved for terminal devices that use the second resource allocation method to obtain resources; or, the resource pool There may be resources reserved for terminal devices that use the first resource allocation method to obtain resources and terminal devices that use the second resource allocation method to obtain resources. For example, a network device configures resources in a resource pool for terminal devices that use mode 1 to obtain resources, or there are resources in the resource pool that are pre-configured for terminal devices that use mode 2 to obtain resources, or there are resources in the resource pool. The pre-configured resource of the terminal device that uses mode 1 and mode 2 to obtain resources.

Take the terminal device that uses the first resource allocation method to obtain resources to send data packets to other terminal devices as an example. When the terminal device that uses the first resource allocation method to obtain resources needs to send data packets to other terminal devices, it finds the resources of the terminal device When in a congested state, the terminal device continues to send data packets on the resources in the congested state, packet loss or packet reception errors will occur, resulting in poor communication quality, affecting user experience, and also causing the terminal device to be unable to be timely Sending data packets results in increased transmission delay, which cannot meet the delay requirements (QoS requirements) in the quality of service requirements.

Wherein, the resources that can be used by the terminal equipment include resources associated with the first resource allocation method, or the resources that can be used by the terminal equipment include resources associated with the first resource allocation method, and the terminal equipment that obtains resources in the first resource allocation method and the The second resource allocation method acquires resources that can be used by all terminal devices.

Wherein, the resources associated with the first resource allocation method may be resources in the resource pool that are reserved for terminal devices that obtain resources in the first resource allocation method. The resource pool also includes resources associated with the second resource allocation method, and the resources associated with the second resource allocation method are resources in the resource pool that are reserved for terminal devices that obtain resources using the second resource allocation method.

Exemplarily, Figure 2 is a schematic diagram of a resource pool. Figure 2 shows: the resources associated with the first resource allocation method and the resources associated with the second resource allocation method. Wherein, the unmarked resource may be a resource that can be used by a terminal device that uses the first resource allocation method to obtain resources and a terminal device that uses the second resource allocation method to obtain resources. It should be noted that Figure 2 is only an example of a resource pool. In actual applications, the resource pool may only have the resources of the terminal device that uses the first resource allocation method to obtain resources, and the resource pool may also only use the second resource allocation. The resource of the terminal device that obtains the resource in a way, the resource associated with each resource allocation method can be any resource in the resource pool, and there is no restriction.

In order to solve the above-mentioned problem, the embodiment of the present application provides a congestion control method. For the specific process of the method, refer to the description in the corresponding embodiment shown in FIG. 4. With this method, when the terminal device that uses the first resource allocation method to obtain resources and/or the terminal device that uses the second resource allocation method to obtain resources has reserved resources in the resource pool, the terminal device can use the congestion status information Obtain the first resource used to send the data packet to be transmitted, thereby reducing packet loss or data packet receiving errors, thereby improving communication quality and improving user experience.

Optionally, each network element in FIG. 1 in the embodiment of the present application, for example, the network device 102 or the terminal device 107, may be a functional module in a device. It is understandable that the functional module can be either a network element in a hardware device, such as a communication chip in a mobile phone, or a software function running on dedicated hardware, or it can be instantiated on a platform (for example, a cloud platform) Virtualization function.

For example, each network element in FIG. 1 may be implemented by the communication device 300 in FIG. 3. Fig. 3 shows a schematic diagram of the hardware structure of a communication device applicable to the embodiments of the present application. The communication device 300 may include at least one processor 301, a communication line 302, a memory 303, and at least one communication interface 304.

The processor 301 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.

The communication line 302 may include a path for transferring information between the aforementioned components, such as a bus.

The communication interface 304 uses any device such as a transceiver to communicate with other devices or communication networks, such as an Ethernet interface, a radio access network (RAN), and a wireless local area network (wireless local area networks, WLAN) etc.

The memory 303 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory can exist independently and is connected to the processor through the communication line 302. The memory can also be integrated with the processor. The memory provided in the embodiments of the present application may generally be non-volatile. Among them, the memory 303 is used to store and execute the computer execution instructions involved in the solution of the present application, and the processor 301 controls the execution. The processor 301 is configured to execute computer-executable instructions stored in the memory 303, so as to implement the method provided in the embodiment of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.

In a specific implementation, as an embodiment, the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3.

In a specific implementation, as an embodiment, the communication device 300 may include multiple processors, such as the processor 301 and the processor 307 in FIG. 3. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

In a specific implementation, as an embodiment, the communication device 300 may further include an output device 305 and an input device 306. The output device 305 communicates with the processor 301 and can display information in a variety of ways. For example, the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. The input device 306 communicates with the processor 301 and can receive user input in a variety of ways. For example, the input device 306 may be a mouse, a keyboard, a touch screen device, or a sensor device.

In a specific implementation, the communication device 300 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in Figure 3 equipment. The embodiment of the present application does not limit the type of the communication device 300.

The congestion control method provided by the embodiment of the present application will be described in detail below in conjunction with FIG. 1, FIG. 2 and FIG. 3.

It should be noted that the name of the message between each network element or the name of each parameter in the message in the following embodiments of this application is just an example, and other names may also be used in specific implementations. The embodiments of this application do not make specific details about this. limited.

It is understandable that, in the embodiments of the present application, the terminal device may perform some or all of the steps in the embodiments of the present application. These steps are only examples, and the embodiments of the present application may also perform other steps or variations of various steps. In addition, each step may be executed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all the steps in the embodiment of the present application.

As shown in FIG. 4, a congestion control method provided by an embodiment of this application, the congestion control method includes step 401 and step 402.

Step 401: The terminal device obtains congestion state information.

The terminal device may be any one of the terminal device 103-the terminal device 109 in the communication system shown in FIG. 1. The terminal device may adopt the first resource allocation method, the congestion state information is used to indicate the congestion state of the resources available to the terminal device, and the resources available to the terminal device include resources associated with the first resource allocation method; or, the terminal device can use Resources include the resources associated with the first resource allocation method, and the resources that can be used by both the terminal device that uses the first resource allocation method to obtain resources and the terminal device that uses the second resource allocation method to obtain resources; or, the resources that can be used by the terminal device include In the resource pool, resources other than those associated with the second resource allocation method. For example, as shown in Figure 2.

Among them, the second resource allocation method is different from the first resource allocation method.

Optionally, the first resource allocation method includes the network device allocating resources for the terminal device (that is, mode 1 mode), and the second resource allocation method includes the terminal device selection resource (that is, the mode 2 method); or, the first resource allocation method includes the terminal The device selects resources (that is, the mode 2 mode), and the second resource allocation mode includes the network device allocating resources for the terminal device (that is, the mode 1 mode).

Optionally, the resources associated with the first resource allocation method include resources in a resource pool that are reserved for terminal devices that use the first resource allocation method to obtain resources, and the resources associated with the second resource allocation method include resources in the resource pool. The second resource allocation method is the resource reserved by the terminal device that obtains the resource, for example, as shown in FIG. 2.

Optionally, the resources associated with the first resource allocation method or the resources associated with the second resource allocation method are configured by the network device; or, the resources associated with the first resource allocation method or the resources associated with the second resource allocation method are pre-configured .

Exemplarily, if the first resource allocation mode includes mode 1, the resources associated with the first resource allocation mode may be configured by the network device.

Exemplarily, if the second resource allocation mode includes mode 1, the resources associated with the second resource allocation mode may be configured by the network device.

Exemplarily, if the first resource allocation mode includes mode 2 mode, the resources associated with the first resource allocation mode may be pre-configured.

Exemplarily, if the second resource allocation manner includes mode 2 manner, the resources associated with the second resource allocation manner may be configured by the network device.

The network device may be the network device 101 or the network device 102 in the communication system shown in FIG. 1.

Optionally, there are resources associated with the second resource allocation method in the resource pool, and the resources associated with the second resource allocation method include resources in the resource pool that are reserved for terminal devices that obtain resources using the second resource allocation method, such as , As shown in 2.

Step 402: The terminal device obtains the first resource according to the congestion state information.

Among them, the first resource may be used to send a data packet to be transmitted from the terminal device.

Based on the congestion control method shown in Figure 4, if there are resources associated with the second resource allocation method in the resource pool, the terminal device can obtain the first resource used to send the data packet to be transmitted by the terminal device according to the congestion state information. It can ensure the transmission delay of data packets, reduce packet loss or data packet receiving errors, thereby improving communication quality and improving user experience.

In some embodiments, in the method shown in FIG. 4, if the congestion state information is greater than or equal to the first threshold, the first resource includes resources associated with the second resource allocation method, and the second resource allocation method is related to the first resource allocation method. The modes are different; if the congestion state information is less than the first threshold, the first resource includes the resource associated with the first resource allocation mode.

Further, as shown in FIG. 5, the method shown in FIG. 4 may further include step 403.

Step 403: If the congestion state information is greater than or equal to the first threshold, the terminal device switches from adopting the first resource allocation method to adopting the second resource allocation method.

It should be noted that step 403 may be performed before the terminal device obtains the first resource, or after the terminal device obtains the first resource, or may also be performed while the terminal device obtains the first resource, without limitation. FIG. 6 only shows that step 403 is performed after the terminal device acquires the first resource.

For example, if the terminal device adopts mode 1, when the congestion state information is greater than or equal to the first threshold, the terminal device switches from adopting mode 1 to adopting mode 2, and the terminal device obtains the first resource.

For example, if the terminal device adopts mode 2 mode, when the congestion status information is greater than or equal to the first threshold, and the terminal device is located within the coverage of the network device, after the terminal device obtains the first resource, the terminal device switches from mode 2 to mode 1 the way.

For example, if the terminal device adopts mode 1, when the congestion status information is greater than or equal to the first threshold, the terminal device acquires the first resource, and the terminal device switches from adopting mode 1 to adopting mode 2.

Optionally, if the terminal device is converted from mode 2 to mode 1, the terminal device sends first indication information to the network device, where the first indication information is used to instruct the network device to allocate transmission resources for the terminal device.

For example, if the terminal device adopts the mode 2 mode, when the congestion state information is greater than or equal to the first threshold and the terminal device is within the coverage of the network device, the terminal device will switch from the mode 2 mode to the mode 1 mode, and the terminal device can transfer to the network The device sends first indication information, where the first indication information may be used to instruct the network device to allocate resources for the terminal device, and the terminal device may receive second indication information sent by the network device, and the second indication information may be used to indicate the first resource.

Optionally, if the terminal device is converted from mode 1 to mode 2, the terminal device sends third indication information to the network device, where the third indication information is used to instruct the network device to no longer allocate transmission resources for the terminal device.

For example, if the terminal device adopts mode 1, when the congestion status information is greater than or equal to the first threshold, the terminal device switches from adopting mode 1 to adopting mode 2, and the terminal device can send third indication information to the network device. The indication information can be used to instruct the network device to no longer allocate resources for the terminal device.

Optionally, if the terminal device switches from adopting the first resource allocation method to adopting the second resource allocation method, the terminal device sends fourth indication information to the network device, and the fourth indication information is used to indicate that the terminal device has switched to the second resource Allocation.

For example, if the terminal device adopts mode 2 mode, when the congestion status information is greater than or equal to the first threshold, and the terminal device is located within the coverage of the network device, the terminal device converts to use mode 1 resources to send data packets and sends the first data packet to the network device. Four indication information, the fourth indication information is used to indicate that the terminal device has switched to mode 1.

For example, if the terminal device adopts mode 1, when the congestion state information is greater than or equal to the first threshold, the terminal device converts to use mode 2 resources to send data packets, and sends fourth instruction information to the network device. The fourth instruction information is used This indicates that the terminal device has switched to mode 2.

Based on the method shown in Figure 5, when the congestion state information is greater than or equal to the first threshold, the terminal device switches from using the first resource allocation method to using the second resource allocation method, so that the terminal device uses the second resource allocation method to associate Resources.

In some embodiments, in the method shown in FIG. 4, the congestion state information may include a channel congestion rate, or the congestion state information may include a channel occupancy rate.

In some embodiments, as shown in FIG. 6, step 401 in the method shown in FIG. 5 may be replaced with step 4011 and step 4012.

Step 4011: The terminal device obtains the congestion state information of each time slot within the measurement window length.

Among them, the measurement window includes one or more time slots.

Optionally, the unit of the measurement window length is a time slot, a subframe, or a second (s).

For example, the measurement window length can be 20 time slots, the measurement window length can also be 10 subframes, and the measurement window length can also be 1s.

Example 1: The congestion status information includes the channel congestion rate.

Optionally, for any time slot within the measurement window length, the terminal device acquiring the channel congestion rate of the any time slot includes: the terminal device according to the sub-channels that the terminal device can use in any time slot Wherein, the signal strength indicator received by the side link indicates the number of sub-channels greater than or equal to the second threshold, the total number of sub-channels included in any one time slot, and the second resource allocation in any time slot. The number of sub-channels associated with the method is used to obtain the channel congestion rate of any time slot.

Taking the measurement window length as T ₁ , the terminal device adopts mode 1, and the resource pool has reserved resources for the terminal device using mode 2 to obtain resources, as an example, we will introduce the channel congestion of each time slot in the terminal device acquiring the measurement window length. The specific process of the rate, where T ₁ is a positive integer.

For time slot i, time slot i can be any time slot within the time slot range [nT ₁ , n-1], and the terminal equipment can be based on the formula

Or formula

Get the channel congestion rate of slot i.

_{Wherein, nT 1 ≤i≤n-1, N} i is the total number of slot i includes _subchannels, N _{i_S-RSSI> Th} within slot i, the subchannel may be used in the terminal device, the side chain line The number of sub-channels whose sidelink received signal strength indicator (S-RSSI) is greater than or equal to the second threshold, where N _{i_2} is the number of sub-channels associated with mode 2 in time slot i. It is assumed here that the S-RSSI of the sub-channel occupied by the resource reserved for the terminal device that acquires the resource in the mode 2 mode is greater than or equal to the second threshold.

Optionally, the S-RSSI is measured by the terminal device.

Taking the measurement window length as T ₁ , the terminal device adopts mode 2, and the resource pool has reserved resources for the terminal device using mode 1 to obtain resources, as an example, we will introduce the channel of each time slot within the measurement window length obtained by the terminal device. The specific process of congestion rate.

Or formula

Get the channel congestion rate of slot i.

_{Wherein, nT 1 ≤i≤n-1, N} i is the total number of slot i includes _subchannels, N _{i_S-RSSI> Th} within slot i, the subchannel may be used in the terminal device, the side chain line The number of sub-channels whose sidelink received signal strength indicator (S-RSSI) is greater than or equal to the second threshold, and _{Ni_1} is the number of sub-channels associated with mode 1 in time slot i. It is assumed here that the S-RSSI of the sub-channel occupied by the resource reserved for the terminal device that acquires the resource in the mode 1 mode is greater than or equal to the second threshold.

Optionally, the S-RSSI is measured by the terminal device. Optionally, the terminal equipment estimates the channel congestion rate of time slot n according to the channel congestion rate of each time slot in time slot [nT ₁ , n-1], so that the terminal equipment can obtain the first channel congestion rate according to the channel congestion rate of time slot n. Resources.

Example 2: Congestion status information includes channel occupancy rate.

Optionally, for any time slot within the measurement window length, the terminal device acquiring the channel occupancy rate of the any time slot includes: the terminal device according to the subroutine that the terminal device can use in any time slot The number of occupied sub-channels in the channel, the total number of sub-channels included in any one time slot, and the number of sub-channels associated with the second resource allocation method in any one time slot, to obtain the any The channel occupancy rate of a time slot.

Taking the measurement window length as T ₁ + T ₂ +1, the terminal device adopts mode 1, and the resource pool has reserved resources for the terminal device that obtains resources in mode 2 as an example, the terminal device acquires the measurement window length. The specific process of the channel occupancy of the time slot, where T ₂ is a positive integer.

For time slot i, time slot i can be any time slot within the time slot range [nT ₁ , n+T ₂ ], and the terminal equipment can follow the formula

Or formula

Get the channel occupancy rate of time slot i.

_{Wherein, nT 1 ≤i≤n-1, N} is the total number of slot i includes _subchannels, N i_occupy is the number of time slot i, the subchannel may be used in the terminal device occupied subchannels , _{Ni_2} is the number of subchannels associated with mode 2 in slot i. It is assumed here that the resources reserved for the terminal device that uses mode 2 to obtain resources are occupied.

It should be noted that when a terminal device sends data packets to other terminal devices, it can first send side-link control information to other terminal devices, and the side-link control information carries information about the data packet (for example: time-frequency Resource, etc.). Therefore, when calculating the channel occupancy rate of time slot i, the terminal device can listen to the side link control information sent by other terminal devices that use mode 1 to obtain resources in time slot i, and according to the side link The sub-channel included in the path control information is calculated as _{Ni_occupy} . For example, the terminal device may default to all the sub-channels included in the side link control information sent by the terminal device that acquires resources in mode 1 as the occupied resources.

Taking the measurement window length as T ₁ + T ₂ +1, the terminal device adopts mode 2, and the resource pool has reserved resources for the terminal device that obtains resources in mode 1 as an example, we will introduce the terminal device to obtain the measurement window length. Channel occupancy rate of each time slot.

Or formula

Get the channel occupancy rate of time slot i.

Among them, nT ₁ ≤i≤n+T ₂ , N _i is the total number of subchannels included in time slot i, and _{Ni_occupy} is the number of occupied subchannels in the subchannels that can be used by terminal equipment in time slot i N _{i_1} is the number of sub-channels associated with mode 1 in time slot i. It is assumed here that the resources reserved for the terminal device that uses mode 1 to obtain resources are in an occupied state.

It should be noted that when a terminal device sends data packets to other terminal devices, it can first send side-link control information to other terminal devices, and the side-link control information carries information about the data packet (for example: time-frequency Resource, etc.). Therefore, when calculating the channel occupancy rate of time slot i, the terminal device can listen to the side link control information sent by other terminal devices that use mode 1 to obtain resources in time slot i, and according to the side link The sub-channel included in the path control information is calculated as _{Ni_occupy} . For example, the terminal device may default to all the sub-channels included in the side link control information sent by the terminal device that acquires resources in mode 2 as the occupied resources.

Optionally, the terminal equipment estimates the channel occupancy rate of time slot n according to the channel occupancy rate of each time slot in the time slot [nT ₁ , n+T ₂ ], so that the terminal device can obtain the first channel occupancy rate of time slot n according to the channel occupancy rate of time slot n. One resource.

Step 4012: The terminal device obtains congestion status information according to the congestion status information of each time slot.

Example 3: The congestion state information includes the channel congestion rate.

Taking the measurement window length as T ₁ , the terminal device adopts mode 1, and the resource pool has reserved resources for terminal devices that acquire resources in mode 2 as an example, the specific process of the terminal device to obtain the channel congestion rate is introduced.

The terminal device can be based on the formula

Or formula

Or formula

Calculate the channel congestion rate.

Taking the measurement window length of the channel congestion rate as T ₁ , the terminal device adopts mode 2, and the resource pool has reserved resources for the terminal device using mode 1 to obtain resources as an example, the terminal device's acquisition of the channel congestion rate is introduced.

The terminal device can be based on the formula

Or formula

Or formula

Calculate the channel congestion rate.

Example 4: Congestion status information includes channel occupancy rate.

Taking the measurement window length as T ₁ + T ₂ +1, the terminal device adopts mode 1, and the resource pool has reserved resources for terminal devices that acquire resources in mode 2 as an example, the specific process of the terminal device obtaining the channel occupancy rate is introduced.

The terminal device can be based on the formula

Or formula

Or formula

Calculate the channel occupancy rate.

Taking the measurement window length of T ₁ + T ₂ +1, the terminal device adopts mode 2, and the resource pool has reserved resources for the terminal device that acquires resources in mode 1 as an example, the terminal device obtains the channel occupancy rate.

The terminal device can be based on the formula

Or formula

Or formula

Calculate the channel occupancy rate.

Optionally, if the terminal device is a terminal device that uses mode 2 to obtain resources, the terminal device determines the number of retransmissions of the data packet according to the congestion state information.

Optionally, the larger the congestion state information, the fewer the number of retransmissions.

For example, if the congestion state information is 80% and the first threshold is 85%, if the terminal device is a terminal device that uses mode 2 to obtain resources, the congestion state information is 80%, which is less than the first threshold, and the terminal device is in mode 2. The data packet is sent to the resource associated with the method, and the number of retransmissions is set to 2.

For another example, taking the congestion state information of 70% and the first threshold value of 85% as an example, if the terminal device is a terminal device that uses mode2 to obtain resources, the congestion state information is 70%, which is less than the first threshold, and the terminal device is in mode2 Send data packets on the resource associated with the method, and configure the number of retransmissions to 3.

For another example, taking the congestion state information of 70% and the first threshold value of 85% as an example, if the terminal device is a terminal device that uses mode2 to obtain resources, the congestion state information is 70%, which is less than the first threshold, and the terminal device is in mode2 Send data packets on the resource associated with the method, and configure the number of retransmissions to 3. Subsequently, after the terminal device retransmits the data packet for the second time on the resource associated in mode 2 mode, the congestion status information becomes 90%, which is greater than the first threshold, and the terminal device can send the data packet on the resource associated in mode 1 mode.

Optionally, the terminal device is a terminal device that obtains resources in mode 1. After obtaining the congestion state information, the terminal device reports the congestion state information to the network device, so that the network device allocates resources to the terminal device according to the congestion state information.

Based on the method shown in FIG. 6, the terminal device can first obtain the congestion status information of each time slot within the measurement window length, and then perform a summation calculation on the congestion status information of each time slot to obtain the congestion status information.

In some embodiments, as shown in FIG. 7, the method shown in FIG. 6 may further include step 404.

Step 404: The terminal device obtains the measurement window length according to the service quality parameter of the data packet to be transmitted, the measurement window length and the service quality parameter of the data packet to be transmitted.

Among them, if the congestion status information includes the channel congestion rate, the measurement window length can be described as the channel congestion rate measurement window; if the congestion status information includes the channel occupancy rate, the measurement window length can be described as the channel occupancy rate measurement window length.

Optionally, the measurement window length includes a short-term measurement window length and a long-term measurement window length.

Optionally, there is a corresponding relationship between the measurement window length and the service quality parameter of the data packet to be transmitted.

In a possible implementation manner, the terminal device obtains the measurement window length according to the service quality parameter of the data packet to be transmitted, the measurement window length and the service quality parameter of the data packet to be transmitted, including: the service quality of the data packet to be transmitted If the parameter is greater than or equal to the third threshold, the terminal device uses the short-term measurement window length as the measurement window length; or, when the service quality parameter of the data packet to be transmitted is less than the third threshold, the terminal device uses the long-term measurement window length as the measurement window length, This is beneficial for data packets with high service quality requirements to be quickly sent with transmission data packets based on short-term measurement results.

In another possible implementation manner, the terminal device obtains the measurement window length according to the service quality parameter of the data packet to be transmitted, the corresponding relationship between the measurement window length and the service quality parameter of the data packet to be transmitted, including: If the quality parameter is less than or equal to the third threshold, the terminal device uses the short-term measurement window length as the measurement window length; or, when the service quality parameter of the data packet to be transmitted is greater than the third threshold, the terminal device uses the long-term measurement window length as the measurement window length This will help improve the accuracy of resource selection for data packets with high service quality requirements.

Among them, the quality of service parameters of the data packets to be transmitted can be determined by at least one of the following parameters: short-range communication data packet priority (prose pre packet priority, PPPP), priority of data packets to be transmitted (priority), data to be transmitted The latency requirement of the packet (latency), the reliability requirement of the data packet to be transmitted (reliability), the minimum communication distance (minimum required communication range) of the terminal device, and the high-level quality of service related parameters (5QI-related parameters).

Exemplarily, if the quality of service parameter of the data packet to be transmitted is greater than or equal to the third threshold, the terminal device uses the congestion state information calculated by the short-term measurement window length as a reference, and if the quality of service parameter of the data packet to be transmitted is less than the third threshold , The terminal device uses the congestion state information calculated through the long-term measurement window length as a reference.

For example, the terminal device uses the congestion state information calculated by the short-term measurement window length to be 80%, the terminal device uses the congestion state information calculated by the long-term measurement window length to be 90%, and the first threshold is 85%. The quality of service parameter of the packet is greater than or equal to the third threshold, the congestion state information obtained by the terminal device is 80%, and 80% is less than 85%. Therefore, the first resource includes the resource associated with the first resource allocation method; if the data packet is to be transmitted The quality of service parameter of is less than the third threshold, the congestion state information obtained by the terminal device is 90%, and 90% is greater than 85%. Therefore, the first resource includes the resource associated with the second resource allocation mode.

Exemplarily, if the service quality parameter of the data packet to be transmitted is less than or equal to the third threshold, the terminal device uses the congestion state information calculated by the short-term measurement window length as a reference, and if the service quality parameter of the data packet to be transmitted is greater than the third threshold , The terminal device uses the congestion state information calculated through the long-term measurement window length as a reference.

For example, the terminal device uses the congestion state information calculated by the short-term measurement window length to be 80%, the terminal device uses the congestion state information calculated by the long-term measurement window length to be 90%, and the first threshold is 85%. The quality of service parameter of the packet is less than or equal to the third threshold, the congestion state information obtained by the terminal device is 80%, and 80% is less than 85%. Therefore, the first resource includes the resource associated with the first resource allocation method; if the data packet is to be transmitted The quality of service parameter of is greater than the third threshold, the congestion state information obtained by the terminal device is 90%, and 90% is greater than 85%. Therefore, the first resource includes resources associated with the second resource allocation mode.

Optionally, the measurement window length includes measurement window lengths of various lengths.

Optionally, there is a corresponding relationship between the measurement window lengths of various lengths and the service quality parameter levels of the data packets to be transmitted.

In a possible implementation, the terminal device obtains the measurement window length according to the service quality parameters of the data packets to be transmitted, the measurement window length and the service quality parameters of the data packets to be transmitted, including: The corresponding relationship between the level of the service quality parameter, the measurement window length of various lengths and the level of the service quality parameter of the data packet to be transmitted, and the measurement window length is obtained.

Optionally, the corresponding relationship between the measurement window lengths of various lengths and the level of the service quality parameters of the data packets to be transmitted may be generated by the network equipment and configured by the network equipment to the terminal equipment; The corresponding relationship between the levels of the quality of service parameters of the transmitted data packet may also be generated by the terminal device.

Among them, the embodiment of the present application does not limit the specific form of the correspondence between measurement window lengths of various lengths and the level of service quality parameters of the data packets to be transmitted, and the relationship between the measurement window lengths of various lengths and the service quality parameters of the data packets to be transmitted The correspondence relationship of the levels can be in the form of a list, an array or other forms, and is not limited. The embodiment of the present application only takes as an example that the corresponding relationship between the measurement window lengths of various lengths and the levels of the service quality parameters of the data packets to be transmitted is in the form of a list.

Exemplarily, Table 1 shows the value of the quality of service parameter of the data packet to be transmitted, the level of the value of the quality of service parameter of the data packet to be transmitted, and the corresponding relationship between measurement window lengths of various lengths. When the value of the quality of service parameter of the data packet is greater than or equal to the service parameter 1, and less than or equal to the service parameter 2, the value of the quality of service parameter of the data packet to be transmitted has a level of 1, and the terminal device adopts the congestion state calculated by the measurement window length 1. Information, when the value of the service quality parameter of the data packet to be transmitted is greater than service parameter 2 and less than or equal to service parameter 3, the value of the service quality parameter of the data packet to be transmitted has a level of 2, and the terminal device uses the measurement window length 2 to calculate When the value of the service quality parameter of the data packet to be transmitted is greater than service parameter 3 and less than or equal to service parameter 4, the value of the value of the service quality parameter of the data packet to be transmitted is level 3, and the terminal device adopts the pass measurement window The congestion state information calculated by length 3, in which the measurement window length 1, the measurement window length 2 and the measurement window length 3 are different.

Table 1

Exemplarily, Table 2 shows the types of service quality parameters of the data packets to be transmitted, the types and levels of the service quality parameters of the data packets to be transmitted, and the corresponding relationship between measurement window lengths of various lengths. When the quality of service parameter type of the data packet is PPPP, the level of the quality of service parameter type of the data packet to be transmitted is 1, and the terminal device uses the congestion state information calculated by the measurement window length 4, when the quality of service parameter of the data packet to be transmitted is When the type is the priority of the data packet to be transmitted, the level of the quality of service parameter type of the data packet to be transmitted is 2, and the terminal device uses the congestion state information calculated by the measurement window length of 5, when the type of the quality of service parameter of the data packet to be transmitted When it is the delay requirement of the data packet to be transmitted, the level of the quality of service parameter type of the data packet to be transmitted is 3, and the terminal device uses the congestion state information calculated by the measurement window length 6. When the type of the quality of service parameter of the data packet to be transmitted When the reliability of the data packet to be transmitted is required, the quality of service parameter type of the data packet to be transmitted is 4, and the terminal device uses the congestion state information calculated by the measurement window length 7. When the type of the quality of service parameter of the data packet to be transmitted When it is the communication distance of the terminal device, the level of the quality of service parameter type of the data packet to be transmitted is 5, and the terminal device uses the congestion state information calculated by the measurement window length 8. When the type of the quality of service parameter of the data packet to be transmitted is the quality of service In terms of related parameters, the level of the quality of service parameter type of the data packet to be transmitted is 6, and the terminal device uses the congestion state information calculated by the measurement window length 9, where the measurement window length 4 to the measurement window length 9 can be the same or different, for example , Measurement window length 4-Measurement window length 9 can be increasing or decreasing.

Table 2

Exemplarily, Table 3 shows the type of the quality of service parameters of the data packet to be transmitted, the level of the type of the quality of service parameter of the data packet to be transmitted, and another correspondence between measurement window lengths of various lengths, where, When the quality of service parameter of the data packet to be transmitted is determined based on PPPP and the priority of the data packet to be transmitted, the level of the quality of service parameter type of the data packet to be transmitted is 1, and the terminal device adopts the congestion state calculated by the measurement window length of 10 Information, when the quality of service parameter of the data packet to be transmitted is determined according to the delay requirement of the data packet to be transmitted and the communication distance of the terminal device, the level of the quality of service parameter type of the data packet to be transmitted is 2, and the terminal device adopts the pass measurement The congestion status information calculated by the window length 11. When the quality of service parameters of the data packets to be transmitted are determined according to the reliability requirements of the data packets to be transmitted and related parameters of the quality of service, the level of the quality of service parameter types of the data packets to be transmitted is 3 The terminal device uses the congestion status information calculated by the measurement window length 12, where the measurement window length 10-measurement window length 12 may be the same or different, for example, the measurement window length 10-measurement window length 12 may be increasing or decreasing .

table 3

It should be noted that what is shown in Table 2 and Table 3 are only examples of the types of service quality parameters of the data packets to be transmitted, and the quality of service parameters of the data packets to be transmitted can also be classified in other ways without limitation.

Optionally, the measurement window length may not only be associated with the level of the service quality parameter value of the data packet to be transmitted, and has a corresponding relationship with the level of the service quality parameter type of the data packet to be transmitted, the measurement window length may also be related to There is a corresponding relationship between the levels of the service quality parameters of the data packets to be transmitted and other forms of data, which are not limited.

Optionally, in practical applications, the corresponding relationship between the measurement window length and the level of the service quality parameter of the data packet to be transmitted can be a certain row or a few rows in Table 1, all of Table 1, or a comparison with Table 1. More correspondences. Similarly, the correspondence between the measurement window length and the level of the quality of service parameter type of the data packet to be transmitted can be a certain row or a few rows in Table 2, all of Table 2 or more than Table 2. Many correspondences.

Based on the method shown in FIG. 7, the terminal device can obtain the measurement window length according to the service quality parameter of the data packet to be transmitted, the corresponding relationship between the measurement window length and the service quality parameter of the data packet to be transmitted.

In some embodiments, as shown in FIG. 8, when the congestion state information includes the channel congestion rate, step 402 in the method shown in FIG. 4 may be replaced with step 4021 and step 4022.

Step 4021: If the channel congestion rate is greater than or equal to the fourth threshold, the terminal device obtains the quality of service parameters of the data packet to be transmitted.

Step 4022: The terminal device uses, among the resources associated with the second resource allocation method, a resource whose quality of service parameter is less than or equal to the quality of service parameter of the data packet to be transmitted as the first resource.

For example, if the terminal device adopts mode 1, when the channel congestion rate is greater than or equal to the first threshold, the terminal device obtains the quality of service parameter of the data packet to be transmitted, and the terminal device associates the resource with the second resource allocation method, and the quality of service parameter is less than Or a resource equal to the quality of service parameter of the data packet to be transmitted is used as the first resource, so that the terminal device can use the resource associated with the second resource allocation method to send the data packet to be transmitted.

Based on the method shown in FIG. 8, if there are resources associated with the second resource allocation method in the resource pool, when the channel congestion rate is greater than or equal to the fourth threshold, the terminal device will serve the resources associated with the second resource allocation method The resource whose quality parameter is less than or equal to the quality of service parameter of the data packet to be transmitted is used as the first resource. Furthermore, the terminal device can ensure the transmission of high-priority services.

It can be understood that, in order to realize the above-mentioned functions, the above-mentioned terminal devices and the like include hardware structures and/or software modules corresponding to the respective functions. Those skilled in the art should easily realize that in combination with the units and algorithm operations of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiment of the present application may divide the terminal device into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

For example, in the case of dividing various functional modules in an integrated manner, FIG. 9 shows a schematic structural diagram of a terminal device 90. The terminal device 90 includes: an obtaining module 901. The obtaining module 901 is configured to obtain congestion state information, where the terminal device adopts the first resource allocation method, and the congestion state information is used to indicate the congestion state of resources available to the terminal device, and the resources available to the terminal device include the first resource allocation method. A resource associated with a resource allocation method; the obtaining module 901 is also configured to obtain a first resource according to the congestion state information, where the first resource is used to send a data packet to be transmitted by the terminal device.

Optionally, if the congestion state information is greater than or equal to a first threshold, the first resource includes resources associated with a second resource allocation method, and the second resource allocation method is different from the first resource allocation method; if the congestion state information Less than the first threshold, the first resource includes resources associated with the first resource allocation mode.

Optionally, as shown in FIG. 10, the terminal device 90 further includes: a conversion module 902. The conversion module 902 is configured to, if the congestion state information is greater than or equal to a first threshold, the terminal device converts from using the first resource allocation method to using the second resource allocation method.

Optionally, the congestion state information includes channel congestion rate; or, the congestion state information includes channel occupancy rate.

Optionally, the acquiring module 901 is specifically used to acquire the congestion status information of each time slot within the measurement window length; wherein the measurement window includes one or more time slots; the acquiring module 901 is also specifically used to The congestion state information of each time slot obtains the congestion state information.

Optionally, when the congestion status information includes the channel congestion rate, the acquiring module 901 is further specifically configured to determine whether the signal strength indicator received by the side link is greater than the sub-channel available to the terminal device in any time slot. Or the number of sub-channels equal to the second threshold, the total number of sub-channels included in any one time slot, and the number of sub-channels associated with the second resource allocation method in any one time slot, to obtain the any The channel congestion rate of a time slot.

Optionally, when the congestion state information includes the channel occupancy rate, the acquiring module 901 is further specifically configured to determine the number of occupied subchannels among the subchannels that can be used by the terminal device in any time slot, and the The total number of subchannels included in any time slot and the number of subchannels associated with the second resource allocation mode in any time slot are used to obtain the channel occupancy rate of any time slot.

Optionally, the obtaining module 901 is further configured to obtain the measurement window length according to the service quality parameter of the data packet to be transmitted, the measurement window length and the service quality parameter of the data packet to be transmitted.

Optionally, the measurement window length includes a short-term measurement window length and a long-term measurement window length. The acquisition module 901 is also specifically configured to: when the service quality parameter of the data packet to be transmitted is greater than or equal to a third threshold, the terminal device measures the short-term The window length is used as the measurement window length; or, the obtaining module 901 is further specifically configured to use the long-term measurement window length as the measurement window length by the terminal device when the service quality parameter of the data packet to be transmitted is less than the third threshold.

Optionally, the measurement window length includes measurement window lengths of various lengths, and the acquisition module 901 is also specifically configured to perform according to the level of the service quality parameter of the data packet to be transmitted, the measurement window length of the various lengths, and the length of the data packet to be transmitted. The corresponding relationship between the levels of the quality of service parameters is obtained, and the measurement window length is obtained.

Optionally, the congestion state information includes the channel congestion rate, and the obtaining module 901 is further specifically configured to obtain the service quality parameters of the data packet to be transmitted by the terminal device if the channel congestion rate is greater than or equal to the fourth threshold; the obtaining module 901 , Is also specifically used to associate resources with a second resource allocation method, a resource whose quality of service parameter is less than or equal to the quality of service parameter of the data packet to be transmitted, as the first resource, and the second resource allocation method is the same as the first resource. The resource allocation method is different.

Optionally, the first resource allocation method includes: the network device configures resources for the terminal device, and the second resource allocation method includes: the terminal device selects resources; or, the first resource allocation method includes: the terminal device selects Resources, the second resource allocation method includes: the network device configures resources for the terminal device.

Among them, all relevant content of each operation involved in the foregoing method embodiment can be cited in the functional description of the corresponding functional module, which will not be repeated here.

In this embodiment, the terminal device 90 is presented in the form of dividing various functional modules in an integrated manner. The "module" here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions. In a simple embodiment, those skilled in the art can imagine that the terminal device 90 may adopt the form shown in FIG. 3.

For example, the processor 301 in FIG. 3 may invoke the computer execution instructions stored in the memory 303 to cause the terminal device 90 to execute the congestion control method in the foregoing method embodiment.

Exemplarily, the function/implementation process of the acquisition module 901 and the conversion module 902 in FIG. 10 may be implemented by the processor 301 in FIG. 3 calling a computer execution instruction stored in the memory 303.

Since the terminal device 90 provided in this embodiment can perform the above-mentioned congestion control method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, and will not be repeated here.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it may be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. Computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions may be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL) or wireless (such as infrared, wireless, microwave, etc.) transmission to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or may include one or more data storage devices such as a server or a data center that can be integrated with the medium. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

Although the present application is described in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and realize the disclosure by looking at the drawings, the disclosure, and the appended claims. Other changes to the embodiment. In the claims, the word "comprising" does not exclude other components or operations, and "a" or "one" does not exclude multiple. A single processor or other unit may implement several functions listed in the claims. Certain measures are described in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

Although the application has been described in combination with specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, this specification and drawings are merely exemplary descriptions of the application defined by the appended claims, and are deemed to have covered any and all modifications, changes, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these modifications and variations.

Claims

A congestion control method, characterized in that the method includes:

The terminal device obtains congestion state information, wherein the terminal device adopts the first resource allocation method, and the congestion state information is used to indicate the congestion state of the resources available to the terminal device, and the resources available to the terminal device include all resources. Resources associated with the first resource allocation method;

The terminal device acquires a first resource according to the congestion state information, where the first resource is used to send a data packet to be transmitted by the terminal device.
The method according to claim 1, wherein if the congestion state information is greater than or equal to a first threshold, the first resource includes resources associated with a second resource allocation method, and the second resource allocation method is The first resource allocation method is different;

If the congestion state information is less than the first threshold, the first resource includes the resource associated with the first resource allocation method.
The method of claim 2, wherein the method further comprises:

If the congestion state information is greater than or equal to the first threshold, the terminal device switches from adopting the first resource allocation manner to adopting the second resource allocation manner.
The method according to any one of claims 1-3, characterized in that,

The congestion state information includes channel congestion rate; or,

The congestion state information includes channel occupancy rate.
The method according to any one of claims 1 to 4, wherein the obtaining of the congestion state information by the terminal device comprises:

The terminal device acquires the congestion state information of each time slot within the measurement window length; wherein, the measurement window length includes one or more time slots;

The terminal device obtains the congestion state information according to the congestion state information of each time slot.
The method according to claim 5, wherein when the congestion status information includes a channel congestion rate, for any time slot within the measurement window, the terminal device acquires the channel of any time slot Congestion rate, including:

The terminal device according to the number of sub-channels that can be used by the terminal device and the signal strength indicator received by the side link is greater than or equal to a second threshold in any one of the time slots, The total number of sub-channels included and the number of sub-channels associated with the second resource allocation manner in any one time slot are included to obtain the channel congestion rate of any one time slot.
The method according to claim 5, wherein when the congestion status information includes a channel occupancy rate, for any time slot within the measurement window, the terminal device acquires the channel of any time slot Occupancy rate, including:

The terminal device according to the number of occupied sub-channels in the sub-channels that can be used by the terminal device in any one time slot, the total number of sub-channels included in any one time slot, and the The number of subchannels associated with the second resource allocation manner in any time slot is used to obtain the channel occupancy rate of any time slot.
The method according to any one of claims 4-7, wherein the method further comprises:

The terminal device acquires the measurement window length according to the service quality parameter of the data packet to be transmitted, the measurement window length, and the service quality parameter of the data packet to be transmitted.
The method according to claim 8, wherein the measurement window length comprises a short-term measurement window length and a long-term measurement window length, and the terminal device is based on the service quality parameter of the data packet to be transmitted, the measurement window length and the length of the data packet to be transmitted. The corresponding relationship between the quality of service parameters and obtaining the measurement window length includes:

When the quality of service parameter of the data packet to be transmitted is greater than or equal to the third threshold, the terminal device uses the short-term measurement window length as the measurement window length; or,

When the quality of service parameter of the data packet to be transmitted is less than a third threshold, the terminal device uses the long-term measurement window length as the measurement window length.
The method according to claim 8, wherein the measurement window length includes measurement window lengths of multiple lengths, and the terminal device is based on the service quality parameters of the data packets to be transmitted, the measurement window length and the service quality of the data packets to be transmitted The corresponding relationship of the parameters to obtain the measurement window length includes:

The terminal device obtains the measurement window length according to the level of the service quality parameter of the data packet to be transmitted, the measurement window length of the various lengths, and the level of the service quality parameter of the data packet to be transmitted.
The method according to claim 1, wherein the congestion state information includes a channel congestion rate, and the terminal device acquiring the first resource according to the congestion state information includes:

If the channel congestion rate is greater than or equal to the fourth threshold, the terminal device obtains the quality of service parameters of the data packet to be transmitted;

The terminal device uses, among the resources associated with the second resource allocation method, a resource whose quality of service parameter is less than or equal to the quality of service parameter of the data packet to be transmitted as the first resource, and the second resource allocation method is related to the resource The first resource allocation method is different.
The method according to any one of claims 1-11, wherein:

The first resource allocation method includes: the network device configures resources for the terminal device, and the second resource allocation method includes: the terminal device selects resources; or,

The first resource allocation method includes: the terminal device selects resources, and the second resource allocation method includes: the network device configures resources for the terminal device.
A terminal device, characterized in that the terminal device includes: an acquisition module;

The acquisition module is configured to acquire congestion state information, wherein the terminal device adopts a first resource allocation method, and the congestion state information is used to indicate the congestion state of resources available to the terminal device, and the terminal device may The used resources include resources associated with the first resource allocation method;

The acquiring module is further configured to acquire a first resource according to the congestion state information, wherein the first resource is used to send a data packet to be transmitted by the terminal device.
The terminal device according to claim 13, wherein if the congestion state information is greater than or equal to a first threshold, the first resource includes a resource associated with a second resource allocation method, and the second resource allocation method is The first resource allocation method is different;

If the congestion state information is less than the first threshold, the first resource includes the resource associated with the first resource allocation method.
The terminal device according to claim 14, wherein the terminal device further comprises: a conversion module;

The conversion module is configured to, if the congestion state information is greater than or equal to a first threshold, convert the terminal device from using the first resource allocation method to using the second resource allocation method.
The terminal device according to any one of claims 13-15, wherein:

The congestion state information includes channel congestion rate; or,

The congestion state information includes channel occupancy rate.
The terminal device according to any one of claims 13-16, wherein:

The acquiring module is specifically configured to acquire the congestion state information of each time slot within the measurement window length; wherein, the measurement window length includes one or more time slots;

The obtaining module is further specifically configured to obtain the congestion state information according to the congestion state information of each time slot.
The terminal device according to claim 17, characterized in that, when the congestion state information includes a channel congestion rate, the acquiring module is also specifically used for sub-channels that can be used by the terminal device in any time slot, The signal strength received by the side link indicates the number of sub-channels greater than or equal to the second threshold, the total number of sub-channels included in any one time slot, and the second resource allocation in any one time slot The number of sub-channels associated with the method is used to obtain the channel congestion rate of any time slot.
The terminal device according to claim 17, wherein when the congestion state information includes a channel occupancy rate, the acquisition module is further specifically configured to determine the sub-channels available to the terminal device in any time slot. The number of occupied sub-channels in any one time slot, the total number of sub-channels included in any one time slot, and the number of sub-channels associated with the second resource allocation method in any one time slot, to obtain the The channel occupancy rate of any time slot.
The terminal device according to any one of claims 16-19, wherein:

The acquiring module is further configured to acquire the measurement window length according to the service quality parameter of the data packet to be transmitted, the corresponding relationship between the measurement window length and the service quality parameter of the data packet to be transmitted.
The terminal device according to claim 20, wherein the measurement window length comprises a short-term measurement window length and a long-term measurement window length, and the acquiring module is further specifically configured to: when the service quality parameter of the data packet to be transmitted is greater than or Equal to the third threshold, the terminal device uses the short-term measurement window length as the measurement window length; or,

The acquiring module is further specifically configured to use the long-term measurement window length as the measurement window length when the service quality parameter of the data packet to be transmitted is less than a third threshold.
The terminal device according to claim 20, wherein the measurement window length includes measurement window lengths of various lengths, and the acquiring module is further specifically configured to perform according to the level of the service quality parameter of the data packet to be transmitted, and the multiple The corresponding relationship between the measurement window length of a length and the level of the service quality parameter of the data packet to be transmitted, and obtain the measurement window length.
The terminal device according to claim 13, wherein the congestion state information includes a channel congestion rate, and the acquiring module is further specifically configured to: if the channel congestion rate is greater than or equal to a fourth threshold, the terminal device Obtain the quality of service parameters of the data packet to be transmitted;

The acquiring module is further specifically configured to associate resources with a quality of service parameter less than or equal to the quality of service parameter of the data packet to be transmitted among the resources associated with the second resource allocation method, as the first resource, and the second resource The resource allocation method is different from the first resource allocation method.
The terminal device according to any one of claims 13-23, wherein:

The first resource allocation method includes: the network device configures resources for the terminal device, and the second resource allocation method includes: the terminal device selects resources; or,

The first resource allocation method includes: the terminal device selects resources, and the second resource allocation method includes: the network device configures resources for the terminal device.
A communication device, characterized in that the communication device includes:

At least one processor, memory;

The memory stores program instructions, and the program instructions are executed in the at least one processor to implement the function of the terminal device in the method of any one of claims 1-12.
A computer-readable storage medium, characterized in that program instructions are stored in the computer-readable storage medium, and when the program instructions are run, to implement the terminal described in the method of any one of claims 1-12 The function of the device.