CN111866944B

CN111866944B - Congestion control method and equipment

Info

Publication number: CN111866944B
Application number: CN201910364439.5A
Authority: CN
Inventors: 刘哲; 黎超; 张兴炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2022-03-04
Anticipated expiration: 2039-04-30
Also published as: WO2020221070A1; CN111866944A

Abstract

The embodiment of the application provides a congestion control method and equipment, and relates to the field of wireless communication.

Description

Congestion control method and equipment

Technical Field

The present application relates to the field of wireless communications, and in particular, to a congestion control method and apparatus.

Background

In Rel-14, Rel-15 and Rel-16 versions of the third generation partnership project, the vehicle networking (V2X) has established itself as a major application of device to device (D2D) technology. V2X is communication for a sidelink, i.e., direct communication between a transmitting terminal and a receiving terminal. The V2X optimizes the specific application requirements of the V2X based on the existing D2D technology, further reduces the access delay of the V2X equipment, and solves the problem of resource conflict.

The resource allocation mode of the sidelink comprises a mode 1 mode and a mode 2 mode, wherein the mode 1 mode is that the network equipment configures resources for the sending terminal, and the mode 2 does not need to be controlled by the network equipment and is that the sending terminal selects the resources. If resources are reserved in the shared resource pool for the terminal equipment which acquires resources in the mode 1 mode and/or the terminal equipment which acquires resources in the mode 2 mode, when the resources of the terminal equipment which acquires resources in the mode 1 (or the mode 2) mode are in a congestion state, the terminal equipment which acquires resources in the mode 1 (or the mode 2) continues to send data packets on the resources in the congestion state, and the situations of packet loss, data packet receiving error, data packet transmission delay and the like can occur, so that the communication quality is poor, and the user experience is influenced.

Disclosure of Invention

The congestion control method and device provided by the embodiment of the application can reduce the situations of packet loss or data packet receiving errors and ensure the transmission delay of the data packet, thereby improving the communication quality and improving the user experience.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides a congestion control method, where the method includes: the method comprises the steps that a terminal device acquires congestion state information, wherein the terminal device adopts a first resource allocation mode, the congestion state information is used for indicating the congestion state of resources which can be used by the terminal device, and the resources which can be used by the terminal device comprise resources related to the first resource allocation mode; and the terminal equipment acquires a first resource according to the congestion state information, wherein the first resource is used for sending a data packet to be transmitted of the terminal equipment.

Based on the technical scheme, the terminal equipment can acquire the first resource used for sending the data packet to be transmitted of the terminal equipment according to the congestion state information, so that the terminal equipment can reduce the situations of packet loss or data packet receiving errors, the communication quality can be improved, and the user experience is improved.

In a possible implementation manner, if the congestion status information is greater than or equal to a first threshold, the first resource includes a resource associated with a second resource allocation manner, and the second resource allocation manner is different from the first resource allocation manner; if the congestion status information is smaller than the first threshold, the first resource includes a resource associated with the first resource allocation manner. Based on the scheme, the terminal device can send the data packet to be transmitted through the resource associated with the second resource allocation mode when the congestion state information is greater than or equal to the first threshold value, and send the data packet to be transmitted through the resource associated with the first resource allocation mode when the congestion state information is less than the first threshold value.

In a possible implementation manner, if the congestion status information is greater than or equal to a first threshold, the terminal device switches from adopting the first resource allocation manner to adopting the second resource allocation manner. Based on the scheme, the terminal device can switch from adopting the first resource allocation mode to adopting the second resource allocation mode when the congestion state information is larger than or equal to the first threshold value, so that the terminal device can reduce the situations of packet loss or data packet receiving errors, thereby improving the communication quality and improving the user experience.

In one possible implementation, the congestion status information includes a channel congestion rate; alternatively, the congestion status information includes a channel occupancy. Based on the scheme, the terminal device can obtain the first resource used for sending the data packet to be transmitted of the terminal device according to the channel congestion rate or the channel occupancy rate, so that the terminal device can reduce the situations of packet loss or data packet receiving errors, thereby improving the communication quality and improving the user experience.

In a possible implementation manner, the acquiring, by the terminal device, the congestion status information includes: the terminal equipment acquires congestion state information of each time slot within the length of a measurement window; wherein the measurement window length comprises one or more time slots; and the terminal equipment acquires the congestion state information according to the congestion state information of each time slot. Based on the scheme, the terminal equipment can acquire the congestion state information according to the congestion state information of each time slot, and acquire the first resource used for sending the data packet to be transmitted of the terminal equipment according to the congestion state information, so that the terminal equipment can reduce the situations of packet loss or data packet receiving errors, the communication quality can be improved, and the user experience can be improved.

In a possible implementation manner, when the congestion status information includes the channel congestion rate, for any timeslot within the measurement window length, the acquiring, by the terminal device, the channel congestion rate of any timeslot includes: and the terminal equipment acquires the channel congestion rate of any time slot according to the number of the subchannels, of which the signal strength indication received by the sidelink is greater than or equal to the second threshold value, the total number of the subchannels included in any time slot, and the number of the subchannels associated with the second resource allocation mode in any time slot, of the subchannels usable by the terminal equipment in any time slot. Based on this scheme, the terminal device may obtain the channel congestion rate of any one time slot according to the number of subchannels, of which, the signal strength indication received by the sidelink is greater than or equal to the second threshold, the total number of subchannels included in any one time slot, and the number of subchannels associated with the second resource allocation manner in any one time slot, and obtain the channel congestion rate according to the channel congestion rate of each time slot, and then obtain the first resource for sending the to-be-transmitted data packet of the terminal device according to the channel congestion rate, so that the terminal device may reduce the situations of packet loss or data packet reception errors, thereby improving communication quality and improving user experience.

In a possible implementation manner, when the congestion status information includes the occupancy rate of the channel, for any time slot within the measurement window length, the acquiring, by the terminal device, the occupancy rate of the channel of the any time slot includes: the terminal device obtains the channel occupancy rate of any one time slot 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 associated with the second resource allocation manner in any one time slot. Based on the scheme, the terminal device obtains the channel occupancy rate of any one time slot according to the number of occupied sub-channels in the sub-channels which 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 associated with the second resource allocation mode in any one time slot, obtains the channel occupancy rate according to the channel occupancy rate of each time slot, and obtains the first resource used for sending the data packet to be transmitted of the terminal device according to the channel occupancy rate.

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

In a possible implementation manner, the measuring window length includes a short-term measuring window length and a long-term measuring window length, and the terminal device obtains the measuring window length according to a corresponding relationship between a quality of service parameter of a data packet to be transmitted, the measuring window length, and the quality of service parameter of the data packet to be transmitted, including: when the service quality parameter of the data packet to be transmitted is greater than or equal to a third threshold value, the terminal device takes 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 smaller than a third threshold, the terminal device takes the long-term measurement window length as the measurement window length. Based on the scheme, the terminal equipment can take 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 value; or, when the service quality parameter of the data packet to be transmitted is smaller 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 multiple lengths, and the obtaining, by the terminal device, the measurement window length according to a correspondence between a quality of service parameter of a data packet to be transmitted, the measurement window length, and the quality of service parameter of the data packet to be transmitted includes: the terminal equipment acquires the measurement window length according to the grade of the service quality parameter of the data packet to be transmitted, the corresponding relation between the measurement window lengths with various lengths and the grade of the service quality parameter of the data packet to be transmitted. Based on the scheme, the terminal equipment can obtain the measurement window length according to the grade of the service quality parameter of the data packet to be transmitted, the corresponding relation between the measurement window lengths with various lengths and the grade of the service quality parameter of the data packet to be transmitted.

In a possible implementation manner, the congestion status information includes the channel congestion rate, and the obtaining, by the terminal device, the first resource according to the congestion status information includes: if the channel congestion rate is greater than or equal to a fourth threshold, the terminal equipment acquires a service quality parameter of a data packet to be transmitted; the terminal device takes the resource with the service quality parameter less than or equal to the service quality parameter of the data packet to be transmitted in the resources related to the second resource allocation mode as the first resource, and the second resource allocation mode is different from the first resource allocation mode. Based on the scheme, the terminal device may use, as the first resource, the resource associated with the second resource allocation manner in which the quality of service parameter is less than or equal to the data packet to be transmitted when the channel congestion rate is greater than or equal to the fourth threshold.

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

In a second aspect, an embodiment of the present application provides a terminal device, where the terminal device has the function and the method of implementing the first aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a third aspect, the present application provides a communication apparatus, which may include: at least one processor in which the program instructions involved are executed to implement the functionality of the terminal device in the method according to the first aspect and any of its designs. Optionally, the communication device may further comprise at least one memory storing the program instructions involved. The communication device may be the method of the first aspect and any of its designs for a terminal device.

In a fourth aspect, the present application provides a system-on-chip, which can be applied in a communication device, the system-on-chip comprising: at least one processor in which the program instructions involved are executed to implement the functionality of the terminal device in the method according to the first aspect and any of its designs. Optionally, the system-on-chip may further include at least one memory storing the related program instructions.

In a fifth aspect, the present application provides a computer storage medium, which can be used in a communication device, and which has stored therein program instructions, which when executed, implement the functions of the terminal device according to the method of the first aspect and any design thereof.

In a sixth aspect, the present application provides a computer program product comprising program instructions that when executed are adapted to implement the functionality of the terminal device according to the method of the first aspect and any of its designs.

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

It is understood that any one of the above-mentioned apparatuses, system chips, computer storage media, computer program products, or communication systems is used to execute the corresponding method provided above, and therefore, the beneficial effects achieved by the apparatuses, the system chips, the computer storage media, the computer program products, or the communication systems can refer to the beneficial effects in the corresponding methods, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application;

fig. 2 is a schematic diagram of a resource pool provided in an embodiment of the present application;

fig. 3 is a schematic hardware structure diagram of a communication device according to an embodiment of the present application;

fig. 4 is a first flowchart illustrating a congestion control method according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a second congestion control method according to an embodiment of the present application;

fig. 6 is a third schematic flowchart of a congestion control method according to an embodiment of the present application;

fig. 7 is a fourth schematic flowchart of a congestion control method according to an embodiment of the present application;

fig. 8 is a fifth flowchart illustrating a congestion control method according to an embodiment of the present application;

fig. 9 is a first schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The method provided in this embodiment of the present application may be applied to any communication system supporting V2X communication, where the communication system may be a third generation partnership project (3 GPP) communication system, such as a Long Term Evolution (LTE) system, a fifth generation (5G) mobile communication system, an NR system, and other next generation communication systems, and may also be a non-3 GPP communication system, without limitation. The method provided by the embodiment of the present application is described below by taking the communication system 100 shown in fig. 1 as an example.

Fig. 1 is a schematic block diagram of a communication system 100 according to an embodiment of the present invention. In fig. 1, a communication system 100 may include a plurality of network devices and a plurality of terminal devices, such as:

network devices

101 and 102, and terminal device 103-terminal device 109 may be included.

In fig. 1, a network device may provide wireless access services for a terminal device. Specifically, each network device corresponds to a service coverage area, and a terminal device entering the service coverage area can communicate with the network device through the Uu port to receive the wireless access service provided by the network device. The terminal equipment and the network equipment can communicate through a Uu port link. The Uu port link may be divided into an Uplink (UL) and a Downlink (DL) according to a direction of data transmitted thereon, where the UL may transmit data transmitted from the terminal device to the network device, and the DL may transmit data transmitted from the network device to the terminal device. Such as: in fig. 1, terminal device 103 is located in the coverage area of network device 101, and network device 101 may transmit data to terminal device 103 via DL and terminal device 103 may transmit data to network device 101 via UL.

The terminal device and other terminal devices can communicate with each other through a direct communication link, such as: the terminal device and other terminal devices can perform unicast communication, broadcast communication or multicast communication through the direct communication link. The direct communication link may be referred to as a sidelink or a Sidelink (SL). Such as: taking the direct communication link as the sidelink as an example, in fig. 1, the terminal device 103 and the terminal device 104 may perform unicast communication through the sidelink, and the terminal device 105 may perform multicast communication with the terminal devices 106 to 109 through the sidelink.

Network devices in fig. 1, such as: the network device 101 or the network device 102 may be a transmission reception node (TRP), a base station, a relay station, an access point, or the like. The network device 101 or the network device 102 may be a network device in a 5G communication system or a network device in a future evolution network, and may also be: a Base Transceiver Station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA) network, or an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or an eNB or enodeb (evolved 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 (CRAN) scenario.

The terminal device in fig. 1, for example: terminal device 103-terminal device 109 may be a device that includes wireless transceiving functionality and may provide communication services to a user. Specifically, the terminal devices 103 to 109 may be devices in a V2X system, devices in a D2D system, devices in a Machine Type Communication (MTC) system, and the like. For example, terminal equipment 103-terminal equipment 109 may refer to an industrial robot, an industrial automation device, a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless terminal device, a user agent, or a user device. For example, the terminal device 103-the terminal device 109 may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a network after 5G, or a terminal device in a future evolution network, which is not limited in this application. The terminal device 103-terminal device 109 may also be an in-vehicle module, an in-vehicle component, an in-vehicle chip, or an in-vehicle unit that is built in the vehicle as one or more components or units, and the vehicle may implement the congestion control method provided by the embodiments of the present application described below through the built-in-vehicle module, the in-vehicle component, the in-vehicle chip, or the in-vehicle unit.

It should be noted that the communication system 100 shown in fig. 1 is only for example and is not used to limit the technical solution of the present application. It will be appreciated by those skilled in the art that communication system 100 may include other devices, and the number of network devices and terminal devices may be determined according to particular needs, in particular implementations. In addition, the network elements in fig. 1 may also be connected through other interfaces, which is not limited.

In the process that the terminal device performs sidelink communication with other terminal devices, the first resource allocation mode and the second resource allocation mode can be adopted to allocate resources for the terminal device, so that the terminal device performs sidelink communication with other terminal devices on the allocated resources. The first resource allocation manner may include allocating, by the network device, a resource to the terminal device (i.e., a mode 1 manner), and the second resource allocation manner may include selecting, by the terminal device, a resource (i.e., a mode 2 manner); alternatively, the first resource allocation manner may include that the terminal device selects resources (i.e., mode 2 manner), and the second resource allocation manner may include that the network device allocates resources to the terminal device (i.e., mode 1 manner).

The resource pool can have resources reserved for the terminal equipment which acquires the resources by adopting a first resource allocation mode; or, there may be resources reserved for the terminal device that acquires the resources by using the second resource allocation manner in the resource pool; or, there may be resources reserved in the resource pool for the terminal device that acquires the resources in the first resource allocation manner and the terminal device that acquires the resources in the second resource allocation manner. For example, the network device configures a resource for a terminal device that acquires the resource in a mode 1 manner in a resource pool, or a resource that is preconfigured for the terminal device that acquires the resource in a mode 2 manner is in the resource pool, or a resource that is preconfigured for the terminal device that acquires the resource in a mode 1 manner and a mode 2 manner is in the resource pool.

Taking the example that the terminal device that acquires the resource by using the first resource allocation manner sends the data packet to other terminal devices, when the terminal device that acquires the resource by using the first resource allocation manner needs to send the data packet to other terminal devices and finds that the resource of the terminal device is in a congestion state, the terminal device continues to send the data packet on the resource in the congestion state, which may cause packet loss or data packet reception error, resulting in poor communication quality and affecting user experience, and may also cause the terminal device to fail to send the data packet in time, resulting in increased transmission delay and failing to meet the delay requirement (QoS requirement) in the quality of service requirement.

The resources available to the terminal device include resources associated with the first resource allocation manner, or the resources available to the terminal device include resources associated with the first resource allocation manner, and both the terminal device that acquires the resources using the first resource allocation manner and the terminal device that acquires the resources using the second resource allocation manner may use the resources.

The resource associated with the first resource allocation manner may be a resource reserved for the terminal device that acquires the resource by using the first resource allocation manner in the resource pool. The resource pool also comprises resources related to the second resource allocation mode, and the resources related to the second resource allocation mode are resources reserved for the terminal equipment which acquires the resources by adopting the second resource allocation mode in the resource pool.

Illustratively, FIG. 2 is a schematic diagram of a resource pool. Fig. 2 shows: and the resources related to the first resource allocation mode and the resources related to the second resource allocation mode. The unmarked resource may be a resource that can be used by both the terminal device that acquires the resource by using the first resource allocation manner and the terminal device that acquires the resource by using the second resource allocation manner. It should be noted that fig. 2 is only an example of a resource pool, in practical applications, only the resource of the terminal device that acquires the resource by using the first resource allocation manner may be in the resource pool, or only the resource of the terminal device that acquires the resource by using the second resource allocation manner may be in the resource pool, and the resource associated with each resource allocation manner may be any resource in the resource pool, which is not limited.

In order to solve the above problem, embodiments of the present application provide a congestion control method, and a specific process of the method may be described with reference to the corresponding embodiment shown in fig. 4. According to the method, under the condition that the terminal equipment which acquires the resources by adopting the first resource allocation mode and/or the terminal equipment which acquires the resources by adopting the second resource allocation mode has reserved resources in the resource pool, the terminal equipment can acquire the first resources for sending the data packet to be transmitted according to the congestion state information, so that the condition of packet loss or data packet receiving errors can be reduced, the communication quality can be improved, and the user experience can be improved.

Optionally, in this embodiment of the present application, each network element in fig. 1, for example, the network device 102 or the terminal device 107, may be a functional module in one device. It is understood that the functional module can be a network element in a hardware device, such as a communication chip in a mobile phone, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (e.g., a cloud platform).

For example, each network element in fig. 1 may be implemented by the communication device 300 in fig. 3. Fig. 3 is a schematic hardware configuration diagram of a communication device applicable to the embodiment of the present application. The communication device 300 may include at least one processor 301, communication lines 302, 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 ics for controlling the execution of programs in accordance with the present disclosure.

Communication link 302 may include a path to transfer information between the aforementioned components, such as a bus.

The communication interface 304 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as an ethernet interface, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc.

The memory 303 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via a communication line 302. The memory may also be integral to the processor. The memory provided by the embodiment of the application can be generally nonvolatile. The memory 303 is used for storing computer-executable instructions for executing the present invention, and is controlled by the processor 301. The processor 301 is configured to execute computer-executable instructions stored in the memory 303, thereby implementing the methods provided by the embodiments of the present application.

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

In particular implementations, processor 301 may include one or more CPUs such as CPU0 and CPU1 in fig. 3, for example, as an example.

In particular implementations, communication device 300 may include multiple processors, such as processor 301 and processor 307 in fig. 3, for one embodiment. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular implementations, communication device 300 may also include an output device 305 and an input device 306, as one embodiment. The output device 305 is in communication with the processor 301 and may 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, a projector (projector), or the like. The input device 306 is in communication with the processor 301 and may 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 sensing device, among others.

In a specific implementation, the communication device 300 may be a desktop, a laptop, a web server, a Personal Digital Assistant (PDA), a mobile phone, a tablet, a wireless terminal device, an embedded device, or a device with a similar structure as in fig. 3. 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 specifically described below with reference to fig. 1, fig. 2, and fig. 3.

It should be noted that, in the following embodiments of the present application, names of messages between network elements or names of parameters in messages are only an example, and other names may also be used in a specific implementation, which is not specifically limited in this embodiment of the present application.

It is understood that, in the embodiments of the present application, a terminal device may perform some or all of the steps in the embodiments of the present application, and these steps are merely examples, and the embodiments of the present application may also perform other steps or various modifications of the steps. Moreover, the various steps may be performed in a different order presented in the embodiments of the application, and not all of the steps in the embodiments of the application may be performed.

As shown in fig. 4, for a congestion control method provided in an embodiment of the present 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 terminal devices 103 to 109 in the communication system shown in fig. 1. The terminal device may adopt a first resource allocation manner, the congestion state information is used to indicate a congestion state of a resource usable by the terminal device, and the resource usable by the terminal device includes a resource associated with the first resource allocation manner; or the resources available to the terminal device include resources associated with the first resource allocation manner, and resources available to both the terminal device that acquires the resources by using the first resource allocation manner and the terminal device that acquires the resources by using the second resource allocation manner; alternatively, the resource available for the terminal device includes a resource other than the resource associated with the second resource allocation manner in the resource pool. Such as shown in fig. 2.

The second resource allocation mode is different from the first resource allocation mode.

Optionally, the first resource allocation manner includes that the network device allocates resources to the terminal device (i.e., a mode 1 manner), and the second resource allocation manner includes that the terminal device selects resources (i.e., a mode 2 manner); or, the first resource allocation manner includes that the terminal device selects resources (i.e., mode 2 manner), and the second resource allocation manner includes that the network device allocates resources to the terminal device (i.e., mode 1 manner).

Optionally, the resource associated with the first resource allocation manner includes a resource reserved for the terminal device that acquires the resource by using the first resource allocation manner in the resource pool, and the resource associated with the second resource allocation manner includes a resource reserved for the terminal device that acquires the resource by using the second resource allocation manner in the resource pool, for example, as shown in fig. 2.

Optionally, the resource associated with the first resource allocation manner or the resource associated with the second resource allocation manner is configured by the network device; or the resource related to the first resource allocation mode or the resource related to the second resource allocation mode is pre-configured.

For example, if the first resource allocation manner includes a mode 1 manner, the resource associated with the first resource allocation manner may be configured by the network device.

For example, if the second resource allocation manner includes a mode 1 manner, the resource associated with the second resource allocation manner may be configured by the network device.

For example, if the first resource allocation manner includes a mode 2 manner, the resource associated with the first resource allocation manner may be preconfigured.

For example, if the second resource allocation manner includes a mode 2 manner, the resource 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, the resource pool further includes resources associated with the second resource allocation manner, where the resources associated with the second resource allocation manner include resources reserved in the resource pool for the terminal device that acquires the resources by using the second resource allocation manner, for example, as shown in fig. 2.

Step 402: and the terminal equipment acquires the first resource according to the congestion state information.

The first resource may be used to send a data packet to be transmitted of the terminal device.

Based on the congestion control method shown in fig. 4, if there are resources associated with the second resource allocation manner in the resource pool, the terminal device may obtain the first resource used for sending the data packet to be transmitted of the terminal device according to the congestion state information, so that the transmission delay of the data packet may be ensured, and the situations of packet loss or data packet reception errors may be reduced, thereby improving communication quality and improving user experience.

In some embodiments, in the method shown in fig. 4, if the congestion status information is greater than or equal to the first threshold, the first resource includes a resource associated with a second resource allocation manner, and the second resource allocation manner is different from the first resource allocation manner; if the congestion status information is smaller than the first threshold, the first resource includes a resource associated with the first resource allocation manner.

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

Step 403: and if the congestion state information is larger than or equal to the first threshold, the terminal equipment is switched from the first resource allocation mode to the second resource allocation mode.

It should be noted that step 403 may be executed before the terminal device acquires the first resource, may be executed after the terminal device acquires the first resource, and may also be executed while the terminal device acquires the first resource, which is not limited. Only step 403 is shown in fig. 6 as being performed after the terminal device acquires the first resource.

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

For example, if the terminal device adopts the mode 2, 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 switches from adopting the mode 2 to adopting the mode 1 after acquiring the first resource.

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

Optionally, if the terminal device changes from adopting the mode 2 to adopting the mode 1, the terminal device sends first indication information to the network device, where the first indication information is used to indicate the network device to allocate transmission resources to the terminal device.

For example, if the terminal device adopts the mode 2, 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 switches from adopting the mode 2 to adopting the mode 1, the terminal device may send first indication information to the network device, where the first indication information may be used to indicate the network device to allocate resources to the terminal device, and the terminal device may receive second indication information sent by the network device, where the second indication information may be used to indicate the first resources.

Optionally, if the terminal device changes from adopting the mode 1 to adopting the mode 2, the terminal device sends third indication information to the network device, where the third indication information is used to indicate that the network device does not allocate transmission resources to the terminal device any more.

For example, if the terminal device adopts the mode 1, when the congestion status information is greater than or equal to the first threshold, the terminal device switches from adopting the mode 1 to adopting the mode 2, and the terminal device may send third indication information to the network device, where the third indication information may be used to indicate that the network device does not allocate resources to the terminal device any more.

Optionally, if the terminal device switches from using the first resource allocation manner to using the second resource allocation manner, the terminal device sends fourth indication information to the network device, where the fourth indication information is used to indicate that the terminal device has switched to the second resource allocation manner.

For example, if the terminal device adopts the mode 2, 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 the resource sending data packet adopting the mode 1 and sends fourth indication information to the network device, where the fourth indication information is used to indicate that the terminal device has converted to the mode 1.

For example, if the terminal device adopts the mode 1, when the congestion status information is greater than or equal to the first threshold, the terminal device converts to a resource sending data packet adopting the mode 2, and sends fourth indication information to the network device, where the fourth indication information is used to indicate that the terminal device has switched to the mode 2.

Based on the method shown in fig. 5, when the congestion status 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, so that the terminal device uses the resources associated with the second resource allocation manner.

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

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 equipment acquires the congestion state information of each time slot within the length of the measurement window.

Wherein the measurement window length includes one or more time slots.

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

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

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

Optionally, for any timeslot within the measurement window length, the obtaining, by the terminal device, a channel congestion rate of the any timeslot includes: and the terminal equipment acquires the channel congestion rate of any time slot according to the number of the subchannels, of which the signal strength indication received by the sidelink is greater than or equal to the second threshold value, the total number of the subchannels included in any time slot, and the number of the subchannels associated with the second resource allocation mode in any time slot, of the subchannels usable by the terminal equipment in any time slot.

The length of the measurement window is T₁The terminal device adopts mode 1, and the specific process of the terminal device for acquiring the channel congestion rate of each time slot within the measurement window length is introduced by taking the resource reservation of the terminal device for acquiring the resource by adopting the mode 2 as an example in the resource pool, wherein T is₁Is a positive integer.

For slot i, slot i may be a range of slots [ n-T ]₁，n-1]In any time slot, the terminal equipment can be according to the publicFormula (II)

Or formula

And acquiring the channel congestion rate of the time slot i.

Wherein, n-T₁≤i≤n-1，N_iIs the total number of subchannels included in time slot i, N_{i_S-RSSI＞Th}In the time slot i, among the sub-channels available to the terminal device, the number of sub-channels whose side link received signal strength indicator (S-RSSI) is greater than or equal to the second threshold, N_{i_2}Is the number of subchannels associated with mode 2 in 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 is greater than or equal to the second threshold.

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

The length of the measurement window is T₁The terminal device adopts mode 2, and the resource pool has the resource reserved for the terminal device adopting the mode 1 to obtain the resource as an example, and introduces a specific process of the terminal device obtaining the channel congestion rate of each time slot within the measurement window length.

For slot i, slot i may be a range of slots [ n-T ]₁，n-1]Any time slot in the terminal equipment can be according to the formula

Or formula

And acquiring the channel congestion rate of the time slot i.

Wherein, n-T₁≤i≤n-1，N_iIs the total number of subchannels included in time slot i, N_{i_S-RSSI＞Th}In the time slot i, the number of sub-channels with the side-link received signal strength indicator (S-RSSI) greater than or equal to the second threshold among the sub-channels available to the terminal equipment，N_{i_1}Is the number of subchannels associated with mode 1 in 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 is greater than or equal to the second threshold.

Optionally, the S-RSSI is measured by the terminal device. Optionally, the terminal device is based on time slot [ n-T ]₁，n-1]And estimating the channel congestion rate of the time slot n according to the channel congestion rate of each time slot so that the terminal equipment can obtain the first resource according to the channel congestion rate of the time slot n.

Example 2: the congestion status information includes a channel occupancy.

Optionally, for any timeslot within the measurement window length, the acquiring, by the terminal device, the channel occupancy of the any timeslot includes: the terminal device obtains the channel occupancy rate of any one time slot 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 associated with the second resource allocation manner in any one time slot.

The length of the measurement window is T₁+T₂+1, the terminal device adopts mode 1, and the specific process of the terminal device for acquiring the channel occupancy rate of each time slot within the measurement window length is introduced by taking the resource reservation of the terminal device for acquiring the resource by adopting the mode 2 as an example in the resource pool, wherein T is₂Is a positive integer.

For slot i, slot i may be a range of slots [ n-T ]₁，n+T₂]Any time slot in the terminal equipment can be according to the formula

Or formula

And acquiring the channel occupancy rate of the time slot i.

Wherein, n-T₁≤i≤n-1，N_iIs the total number of subchannels included in time slot i, N_{i_occupy}In a subchannel available to the terminal equipment in time slot iNumber of occupied sub-channels, N_{i_2}Is the number of subchannels associated with mode 2 in slot i. It is assumed here that resources reserved for a terminal device that acquires resources in mode 2 are in an occupied state.

It should be noted that, when the terminal device sends a data packet to another terminal device, the terminal device may send sidelink control information to the other terminal device first, where the sidelink control information carries related information (for example, time-frequency resource, etc.) of the data packet, and therefore, when calculating the channel occupancy of the time slot i, the terminal device may monitor sidelink control information sent by another terminal device that acquires the resource in a mode 1 manner in the time slot i, and calculate N according to a sub-channel included in the sidelink control information_{i_occupy}For example, the terminal device may default that all the subchannels included in the sidelink control information sent by the terminal device that acquires the resources in the mode 1 are already occupied resources.

The length of the measurement window is T₁+T₂+1, the terminal device adopts mode 2, and the resource pool has the resource reserved for the terminal device adopting the mode 1 to obtain the resource as an example, so as to introduce that the terminal device obtains the channel occupancy rate of each time slot within the length of the measurement window.

Or formula

And acquiring the channel occupancy rate of the time slot i.

Wherein, n-T₁≤i≤n+T₂，N_iIs the total number of subchannels included in time slot i, N_{i_occupy}The number of occupied sub-channels in the sub-channels available to the terminal device in time slot i, N_{i_1}Is the number of subchannels associated with mode 1 in slot i. It is assumed here that the resources reserved for the terminal device that acquires the resources in mode 1 are occupiedThe active state.

It should be noted that, when the terminal device sends a data packet to another terminal device, the terminal device may send sidelink control information to the other terminal device first, where the sidelink control information carries related information (for example, time-frequency resource, etc.) of the data packet, and therefore, when calculating the channel occupancy of the time slot i, the terminal device may monitor sidelink control information sent by another terminal device that acquires the resource in a mode 1 manner in the time slot i, and calculate N according to a sub-channel included in the sidelink control information_{i_occupy}For example, the terminal device may default that all the subchannels included in the sidelink control information sent by the terminal device that acquires the resources in the mode 2 are already occupied resources.

Optionally, the terminal device is based on time slot [ n-T ]₁，n+T₂]And estimating the channel occupancy rate of the time slot n by the channel occupancy rate of each time slot, so that the terminal equipment can acquire the first resource according to the channel occupancy rate of the time slot n.

Step 4012: and the terminal equipment acquires the congestion state information according to the congestion state information of each time slot.

Example 3: the congestion status information includes the channel congestion rate.

The length of the measurement window is T₁The terminal device adopts mode 1, and the resource pool has a specific process of acquiring the channel congestion rate by the terminal device by taking the resource reservation of the terminal device which acquires the resource by adopting the mode 2 as an example.

The terminal equipment can be according to the formula

Or formula

Or formula

Or formula

Calculating letterThe congestion rate of the channel.

The following measurement window length of the channel congestion rate is T₁The terminal device adopts mode 2, and resources are reserved in the resource pool for the terminal device adopting the mode 1 to obtain the resources, for example, so that the terminal device is introduced to obtain the channel congestion rate.

The terminal equipment can be according to the formula

Or formula

Or formula

Or formula

And calculating the congestion rate of the channel.

Example 4: the congestion status information includes a channel occupancy.

The length of the measurement window is T₁+T₂+1, the terminal device adopts mode 1, and the specific process of acquiring the channel occupancy rate by the terminal device is introduced by taking the resource reservation of the terminal device for acquiring the resource by adopting the mode 2 as an example in the resource pool.

The terminal equipment can be according to the formula

Or formula

Or formula

Or formula

And calculating the channel occupancy rate.

The length of the measurement window is T₁+T₂+1, the terminal equipment adopts mode 2, and there is a resource pool for adoptionThe method for acquiring the resource by using the mode 1 is taken as an example to introduce that the terminal equipment acquires the channel occupancy rate.

The terminal equipment can be according to the formula

Or formula

Or formula

Or formula

And calculating the channel occupancy rate.

Optionally, if the terminal device acquires the resource in the mode 2, the terminal device determines the retransmission times of the data packet according to the congestion state information.

Optionally, the larger the congestion status information is, the fewer the retransmission times are.

For example, taking the congestion status information as 80% and the first threshold as 85%, if the terminal device is a terminal device that acquires resources in the mode 2 manner, and the congestion status information is 80% and is smaller than the first threshold, the terminal device sends a data packet on the resources associated with the mode 2 manner, and configures the number of retransmissions as 2.

For another example, taking the congestion status information as 70% and the first threshold as 85%, if the terminal device is a terminal device that acquires resources in the mode 2 manner, and the congestion status information is 70% and is smaller than the first threshold, the terminal device transmits a data packet on the resources associated with the mode 2 manner, and configures the number of retransmissions as 3.

For another example, taking the congestion status information as 70% and the first threshold as 85%, if the terminal device is a terminal device that acquires resources in the mode 2 manner, and the congestion status information is 70% and is smaller than the first threshold, the terminal device transmits a data packet on the resources associated with the mode 2 manner, and configures the number of retransmissions as 3. Subsequently, after the terminal device retransmits the data packet for the second time on the resource associated with the mode 2, the congestion state information becomes 90%, which is greater than the first threshold, and the terminal device may send the data packet on the resource associated with the mode 1.

Optionally, the terminal device acquires the resource in a mode 1, and after obtaining the congestion state information, the terminal device reports the congestion state information to the network device, so that the network device allocates the resource to the terminal device according to the congestion state information.

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

In some embodiments, as shown in FIG. 7, step 404 may also be included in the method of FIG. 6.

Step 404: and the terminal equipment acquires the length of the measurement window according to the corresponding relation between the service quality parameter of the data packet to be transmitted, the length of the measurement window and the service quality parameter of the data packet to be transmitted.

If the congestion status information includes the channel congestion rate, the measurement window length may be described as the measurement window length of the channel congestion rate; if the congestion status information includes the occupancy of the channel, the measurement window length may be described as the occupancy of the channel.

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

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

A possible implementation manner is that a terminal device obtains a measurement window length according to a corresponding relationship between a service quality parameter of a data packet to be transmitted, the measurement window length and a service quality parameter of the data packet to be transmitted, and the method includes: when the service quality parameter of the data packet to be transmitted is greater than or equal to a third threshold value, the terminal equipment takes 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 smaller than the third threshold, the terminal device takes the long-term measurement window length as the measurement window length, so that the data packet with high service quality requirement is favorable for rapidly sending the data packet with transmission according to the short-term measurement result.

Another possible implementation manner is that the terminal device obtains the length of the measurement window according to the corresponding relationship between the quality of service parameter of the data packet to be transmitted, the length of the measurement window, and the quality of service parameter of the data packet to be transmitted, and the method includes: when the service quality parameter of the data packet to be transmitted is less than or equal to a third threshold value, the terminal equipment takes 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 takes the long-term measurement window length as the measurement window length, which is beneficial to improving the accuracy of resource selection of the data packet with high service quality requirement.

Wherein the quality of service parameter of the data packet to be transmitted can be determined by at least one of the following parameters: the priority (PPPP) of the near field communication packet, the priority (priority) of the packet to be transmitted, the latency requirement (latency) of the packet to be transmitted, the reliability requirement (reliability) of the packet to be transmitted, the minimum required communication range (minimum required communication range) of the terminal device, and the high-level quality of service related parameter (5QI-related parameter).

For example, 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 by the long-term measurement window length as a reference.

For example, taking that the congestion state information calculated by the terminal device through the short-term measurement window length is 80%, the congestion state information calculated by the terminal device through the long-term measurement window length is 90%, and the first threshold value is 85%, if the quality of service parameter of the data packet to be transmitted is greater than or equal to the third threshold value, the congestion state information acquired by the terminal device is 80%, and 80% is less than 85%, so that the first resource includes a resource associated with the first resource allocation manner; if the quality of service parameter of the data packet to be transmitted is smaller than the third threshold, the congestion state information acquired by the terminal device is 90%, and 90% is larger than 85%, so that the first resource includes a resource associated with the second resource allocation manner.

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

For example, taking that the congestion state information calculated by the terminal device through the short-term measurement window length is 80%, the congestion state information calculated by the terminal device through the long-term measurement window length is 90%, and the first threshold value is 85%, if the quality of service parameter of the data packet to be transmitted is less than or equal to the third threshold value, the congestion state information acquired by the terminal device is 80%, and 80% is less than 85%, so that the first resource includes a resource associated with the first resource allocation manner; if the quality of service parameter of the data packet to be transmitted is greater than the third threshold, the congestion state information acquired by the terminal device is 90%, and 90% is greater than 85%, so that the first resource includes a resource associated with the second resource allocation manner.

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

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

A possible implementation manner is that a terminal device obtains a measurement window length according to a corresponding relationship between a service quality parameter of a data packet to be transmitted, the measurement window length and a service quality parameter of the data packet to be transmitted, and the method includes: and the terminal equipment acquires the length of the measurement window according to the grade of the service quality parameter of the data packet to be transmitted, the corresponding relation between the lengths of the measurement windows with various lengths and the grade of the service quality parameter of the data packet to be transmitted.

Optionally, the correspondence between the measurement window lengths of the multiple lengths and the grades of the quality of service parameters of the data packets to be transmitted may be generated by the network device, and configured to the terminal device by the network device; the corresponding relation between the measurement window lengths with various lengths and the grade of the service quality parameter of the data packet to be transmitted can also be generated by the terminal equipment.

The specific form of the corresponding relationship between the measurement window lengths with various lengths and the grades of the service quality parameters of the data packets to be transmitted is not limited in the embodiment of the present application, and the corresponding relationship between the measurement window lengths with various lengths and the grades of the service quality parameters of the data packets to be transmitted may be in a list form, an array form or other forms, and is not limited. The embodiment of the present application describes only the correspondence relationship in the form of a list, which is the correspondence relationship between the measurement window lengths of various lengths and the levels of the qos parameters of the data packets to be transmitted.

Illustratively, table 1 shows a corresponding relationship among a numerical value of a quality of service parameter of a data packet to be transmitted, a grade of a numerical value of a quality of service parameter of a data packet to be transmitted, and measurement window lengths of various lengths, wherein when the numerical value of the quality of service parameter of the data packet to be transmitted is greater than or equal to service parameter 1 and less than or equal to service parameter 2, the grade of the numerical value of the quality of service parameter of the data packet to be transmitted is 1, the terminal device uses congestion state information calculated by measurement window length 1, when the numerical value of the quality of service parameter of the data packet to be transmitted is greater than service parameter 2 and less than or equal to service parameter 3, the grade of the numerical value of the quality of service parameter of the data packet to be transmitted is 2, the terminal device uses congestion state information calculated by measurement window length 2, and when the numerical value of the quality of service parameter of the data packet to be transmitted is greater than service parameter 3, and when the service parameter is less than or equal to the service parameter 4, the grade of the numerical value of the service quality parameter of the data packet to be transmitted is 3, and the terminal equipment adopts congestion state information calculated by the measuring window length 3, wherein the measuring window length 1, the measuring window length 2 and the measuring window length 3 are different.

TABLE 1

Exemplarily, table 2 shows the corresponding relationship among the type of the qos parameter of the packet to be transmitted, the class of the qos parameter of the packet to be transmitted, and the measurement window lengths of various lengths, wherein when the type of the qos parameter of the packet to be transmitted is PPPP, the class of the qos parameter type of the packet to be transmitted is 1, the terminal device uses congestion state information calculated by the measurement window length 4, when the type of the qos parameter of the packet to be transmitted is the priority of the packet to be transmitted, the class of the qos parameter type of the packet to be transmitted is 2, the terminal device uses congestion state information calculated by the measurement window length 5, when the type of the qos parameter of the packet to be transmitted is the delay requirement of the packet to be transmitted, the class of the qos parameter type of the packet to be transmitted is 3, the congestion state information calculated by the measuring window length 6 is adopted by the terminal equipment, when the type of the service quality parameter of the data packet to be transmitted is the reliability requirement of the data packet to be transmitted, the grade of the service quality parameter type of the data packet to be transmitted is 4, the congestion state information calculated by the measuring window length 7 is adopted by the terminal equipment, when the type of the service quality parameter of the data packet to be transmitted is the communication distance of the terminal equipment, the grade of the service quality parameter type of the data packet to be transmitted is 5, the congestion state information calculated by the measuring window length 8 is adopted by the terminal equipment, when the type of the service quality parameter of the data packet to be transmitted is the service quality related parameter, the grade of the service quality parameter type of the data packet to be transmitted is 6, the congestion state information calculated by the measuring window length 9 is adopted by the terminal equipment, wherein the measuring window lengths 4-9 can be the same or different, for example, the measurement window length 4-the measurement window length 9 may be incremental or decremental.

TABLE 2

Illustratively, table 3 shows another corresponding relationship among the type of the qos parameter of the packet to be transmitted, the class of the qos parameter of the packet to be transmitted, and the length of the measurement window of various lengths, where when the qos parameter of the packet to be transmitted is determined according to the PPPP and the priority of the packet to be transmitted, the class of the qos parameter type of the packet to be transmitted is 1, the terminal device uses congestion state information calculated by the measurement window length 10, when the qos parameter of the packet to be transmitted is determined according to the delay requirement of the packet to be transmitted and the communication distance of the terminal device, the class of the qos parameter type of the packet to be transmitted is 2, the terminal device uses congestion state information calculated by the measurement window length 11, when the qos parameter of the packet to be transmitted is determined according to the reliability requirement of the packet to be transmitted and the qos related parameter, the class of the qos parameter type of the data packet to be transmitted is 3, and the terminal device uses the congestion status information calculated by the measurement window length 12, where the measurement window length 10 — the measurement window length 12 may be the same or different, for example, the measurement window length 10 — the measurement window length 12 may be incremented or decremented.

TABLE 3

It should be noted that the examples shown in table 2 and table 3 are only examples of the types of the quality of service parameters of the data packets to be transmitted, and the quality of service parameters of the data packets to be transmitted may also be classified in other manners, which is not limited.

Optionally, the measurement window length may have a correlation with the level of the numerical value of the quality of service parameter of the data packet to be transmitted and a corresponding relationship with the level of the type of the quality of service parameter of the data packet to be transmitted, and the measurement window length may also have a corresponding relationship with the level of data in other forms of the quality of service parameter of the data packet to be transmitted, which is not limited.

Optionally, in practical application, the corresponding relationship between the length of the measurement window and the level of the numerical value of the qos parameter of the data packet to be transmitted may be a certain row or a certain number of rows in table 1, and all or more than table 1 in table 1, and similarly, the corresponding relationship between the length of the measurement window and the level of the qos parameter type of the data packet to be transmitted may be a certain row or a certain number of rows in table 2, and all or more than table 2 in table 2.

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

In some embodiments, as shown in fig. 8, when the congestion status information includes a channel congestion rate, step 402 in the method shown in fig. 4 may be replaced with

steps

4021 and 4022.

Step 4021: and if the channel congestion rate is greater than or equal to the fourth threshold, the terminal equipment acquires the service quality parameters of the data packet to be transmitted.

Step 4022: and the terminal equipment takes the resource of which the service quality parameter is less than or equal to the service quality parameter of the data packet to be transmitted in the resources related to the second resource allocation mode as the first resource.

For example, if the terminal device adopts the 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 uses, as the first resource, 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 in the resources associated with the second resource allocation mode, so that the terminal device transmits the data packet to be transmitted by using the resources associated with the second resource allocation mode.

Based on the method shown in fig. 8, if there are resources associated with the second resource allocation manner in the resource pool, when the channel congestion rate is greater than or equal to the fourth threshold, the terminal device uses, as the first resource, a resource whose qos parameter is less than or equal to the qos parameter of the data packet to be transmitted in the resources associated with the second resource allocation manner, and further, the terminal device can ensure transmission of the high-priority service.

It is to be understood that the terminal device and the like described above include a hardware structure and/or a software module corresponding to each function for realizing the functions described above. Those skilled in the art will readily appreciate that the various illustrative elements and algorithm operations described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal device may be divided into the functional modules according to the above method example, 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 integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

For example, in the case where the functional modules are divided in an integrated manner, fig. 9 shows a schematic configuration diagram of a terminal device 90. The terminal device 90 includes: an acquisition module 901. An obtaining module 901, configured to obtain congestion state information, where the terminal device adopts a first resource allocation manner, the congestion state information is used to indicate a congestion state of a resource that can be used by the terminal device, and the resource that can be used by the terminal device includes a resource associated with the first resource allocation manner; the obtaining module 901 is further configured to obtain a first resource according to the congestion status information, where the first resource is used to send a data packet to be transmitted of the terminal device.

Optionally, if the congestion status information is greater than or equal to a first threshold, the first resource includes a resource associated with a second resource allocation manner, where the second resource allocation manner is different from the first resource allocation manner; if the congestion status information is smaller than the first threshold, the first resource includes a resource associated with the first resource allocation manner.

Optionally, as shown in fig. 10, the terminal device 90 further includes: a conversion module 902. A converting module 902, configured to, if the congestion status information is greater than or equal to a first threshold, convert the terminal device from adopting the first resource allocation manner to adopting the second resource allocation manner.

Optionally, the congestion status information includes a channel congestion rate; alternatively, the congestion status information includes a channel occupancy.

Optionally, the obtaining module 901 is specifically configured to obtain congestion state information of each time slot within the measurement window length; wherein the measurement window length comprises one or more time slots; the obtaining module 901 is further specifically configured to obtain the congestion state information according to the congestion state information of each timeslot.

Optionally, when the congestion state information includes the channel congestion rate, the obtaining module 901 is further specifically configured to obtain the channel congestion rate of any one time slot according to the number of subchannels, of which, in the sub-channels that can be used by the terminal device and are received by the sidelink, the total number of sub-channels included in any one time slot, and the number of sub-channels associated with the second resource allocation manner in any one time slot.

Optionally, when the congestion status information includes the channel occupancy, the obtaining module 901 is further specifically configured to obtain the channel occupancy of any one time slot 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 associated with the second resource allocation manner in any one time slot.

Optionally, the obtaining module 901 is further configured to obtain the length of the measurement window according to a corresponding relationship between the quality of service parameter of the data packet to be transmitted, the length of the measurement window, and the quality of service 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, and the obtaining module 901 is further specifically configured to, when the quality of service parameter of the data packet to be transmitted is greater than or equal to a third threshold, the terminal device uses the short-term measurement window length as the measurement window length; or, the obtaining module 901 is further specifically configured to, when the quality of service parameter of the data packet to be transmitted is smaller than a third threshold, use the long-term measurement window length as the measurement window length by the terminal device.

Optionally, the measurement window length includes measurement window lengths of multiple lengths, and the obtaining module 901 is further specifically configured to obtain the measurement window length according to the grade of the quality of service parameter of the data packet to be transmitted, and a corresponding relationship between the measurement window lengths of the multiple lengths and the grade of the quality of service parameter of the data packet to be transmitted.

Optionally, the congestion status information includes the channel congestion rate, and the obtaining module 901 is further specifically configured to, if the channel congestion rate is greater than or equal to a fourth threshold, obtain, by the terminal device, a quality of service parameter of the data packet to be transmitted; the obtaining module 901 is further specifically configured to use, as the first resource, a resource whose qos parameter is less than or equal to the qos parameter of the data packet to be transmitted in the resources associated with the second resource allocation manner, where the second resource allocation manner is different from the first resource allocation manner.

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

All relevant contents of the operations related to the method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the present embodiment, the terminal device 90 is presented in a form of dividing each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that provides the described functionality. In a simple embodiment, the terminal device 90 may take the form shown in fig. 3, as will be appreciated by those skilled in the art.

For example, the processor 301 in fig. 3 may execute the instructions by calling a computer stored in the memory 303, so that the terminal device 90 executes the congestion control method in the above method embodiment.

Illustratively, the functions/implementation procedures of the obtaining module 901 and the converting module 902 in fig. 10 may be implemented by the processor 301 in fig. 3 calling a computer executing instruction stored in the memory 303.

Since the terminal device 90 provided in this embodiment can execute the congestion control method, the technical effects obtained by the terminal device can refer to the method embodiments described above, and are not described herein again.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or operations, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of congestion control, the method comprising:

the method comprises the steps that a terminal device obtains congestion state information, wherein the terminal device adopts a first resource allocation mode, the congestion state information is used for indicating the congestion state of resources which can be used by the terminal device, and the resources which can be used by the terminal device comprise resources related to the first resource allocation mode;

the terminal equipment acquires a first resource according to the congestion state information, wherein the first resource is used for sending a data packet to be transmitted of the terminal equipment;

the acquiring, by the terminal device, the congestion state information includes:

the terminal equipment acquires congestion state information of each time slot within the length of a measurement window; wherein the measurement window length comprises one or more time slots;

and the terminal equipment acquires the congestion state information according to the congestion state information of each time slot.

2. The method of claim 1, wherein if the congestion status information is greater than or equal to a first threshold, the first resource comprises a resource associated with a second resource allocation manner, and the second resource allocation manner is different from the first resource allocation manner;

if the congestion status information is smaller than a first threshold, the first resource includes a resource associated with a first resource allocation manner.

3. The method of claim 2, further comprising:

and if the congestion state information is larger than or equal to a first threshold value, the terminal equipment is switched from the first resource allocation mode to the second resource allocation mode.

4. The method according to any one of claims 1 to 3,

the congestion status information comprises a channel congestion rate; or,

the congestion status information includes a channel occupancy.

5. The method according to any one of claims 1 to 3, wherein when the congestion status information includes a channel congestion rate, for any time slot within the measurement window length, the acquiring, by the terminal device, the channel congestion rate of the any time slot includes:

and the terminal equipment acquires the channel congestion rate of any time slot according to the number of the sub-channels of which the signal strength indication received by the sidelink is greater than or equal to a second threshold value, the total number of the sub-channels included in any time slot and the number of the sub-channels associated with the second resource allocation mode in any time slot in the sub-channels which can be used by the terminal equipment in any time slot.

6. The method according to any one of claims 1 to 3, wherein when the congestion status information includes a channel occupancy, for any one of the time slots within the measurement window length, the acquiring, by the terminal device, the channel occupancy of the any one of the time slots includes:

and the terminal equipment acquires the channel occupancy rate of any time slot according to the number of occupied sub-channels in the sub-channels which can be used by the terminal equipment in any time slot, the total number of sub-channels included in any time slot and the number of sub-channels associated with the second resource allocation mode in any time slot.

7. The method of claim 4, further comprising:

and the terminal equipment acquires the length of the measurement window according to the corresponding relation between the service quality parameter of the data packet to be transmitted, the length of the measurement window and the service quality parameter of the data packet to be transmitted.

8. The method according to claim 7, wherein the measurement window length includes a short-term measurement window length and a long-term measurement window length, and the obtaining, by the terminal device, the measurement window length according to a corresponding relationship between a quality of service parameter of a data packet to be transmitted, the measurement window length, and the quality of service parameter of the data packet to be transmitted includes:

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

and when the service quality parameter of the data packet to be transmitted is smaller than a third threshold value, the terminal equipment takes the long-term measurement window length as the measurement window length.

9. The method according to claim 7, wherein the measurement window length includes measurement window lengths of various lengths, and the obtaining, by the terminal device, the measurement window length according to a correspondence between a quality of service parameter of a data packet to be transmitted, the measurement window length, and a quality of service parameter of the data packet to be transmitted includes:

and the terminal equipment acquires the measuring window length according to the grade of the service quality parameter of the data packet to be transmitted, the corresponding relation between the measuring window lengths with various lengths and the grade of the service quality parameter of the data packet to be transmitted.

10. The method of claim 1, wherein the congestion status information comprises a channel congestion rate, and wherein the obtaining, by the terminal device, the first resource according to the congestion status information comprises:

if the channel congestion rate is greater than or equal to a fourth threshold, the terminal equipment acquires a service quality parameter of a data packet to be transmitted;

and the terminal equipment takes the resource of which the service quality parameter is less than or equal to the service quality parameter of the data packet to be transmitted in the resources related to the second resource allocation mode as the first resource, wherein the second resource allocation mode is different from the first resource allocation mode.

11. The method according to any one of claims 1 to 3,

the first resource allocation mode comprises the following steps: the network device configures resources for the terminal device, and the second resource allocation mode includes: the terminal equipment selects resources; or,

the first resource allocation mode comprises the following steps: the terminal device selects resources, and the second resource allocation mode includes: and the network equipment configures resources for the terminal equipment.

12. A terminal device, characterized in that the terminal device comprises: an acquisition module;

the acquiring module is configured to acquire congestion state information, where the terminal device adopts a first resource allocation manner, the congestion state information is used to indicate a congestion state of a resource that can be used by the terminal device, and the resource that can be used by the terminal device includes a resource associated with the first resource allocation manner;

the obtaining module is further 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 of the terminal device;

the acquisition module is specifically used for acquiring congestion state information of each time slot within the length of a measurement window; wherein the measurement window length comprises 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.

13. The terminal device according to claim 12, wherein if the congestion status information is greater than or equal to a first threshold, the first resource includes a resource associated with a second resource allocation manner, and the second resource allocation manner is different from the first resource allocation manner;

14. The terminal device according to claim 13, wherein the terminal device further comprises: a conversion module;

the conversion module is configured to, if the congestion status information is greater than or equal to a first threshold, convert the terminal device from adopting the first resource allocation manner to adopting the second resource allocation manner.

15. The terminal device according to any of claims 12-14,

the congestion status information comprises a channel congestion rate; or,

the congestion status information includes a channel occupancy.

16. The terminal device according to any one of claims 12 to 14, wherein when the congestion status information includes a channel congestion rate, the obtaining module is further specifically configured to obtain the channel congestion rate of any one of the time slots according to the number of subchannels, of which the signal strength indication received by the sidelink is greater than or equal to the second threshold, the total number of subchannels included in any one of the time slots, and the number of subchannels associated with the second resource allocation manner in any one of the time slots, of the subchannels usable by the terminal device in any one of the time slots.

17. The terminal device according to any one of claims 12 to 14, wherein when the congestion status information includes a channel occupancy rate, the obtaining module is further specifically configured to obtain the channel occupancy rate of any one of the time slots according to the number of occupied subchannels in the subchannels usable by the terminal device in any one of the time slots, the total number of subchannels included in any one of the time slots, and the number of subchannels associated with the second resource allocation manner in any one of the time slots.

18. The terminal device of claim 15,

the obtaining module is further configured to obtain the length of the measurement window according to a corresponding relationship between the quality of service parameter of the data packet to be transmitted, the length of the measurement window, and the quality of service parameter of the data packet to be transmitted.

19. The terminal device according to claim 18, wherein the measurement window length includes a short-term measurement window length and a long-term measurement window length, and the obtaining module is further configured to, when the quality of service parameter of the data packet to be transmitted is greater than or equal to a third threshold, take the short-term measurement window length as the measurement window length by the terminal device; or,

the obtaining module is further specifically configured to, when the quality of service parameter of the data packet to be transmitted is smaller than a third threshold, use the long-term measurement window length as the measurement window length by the terminal device.

20. The terminal device according to claim 18, wherein the measurement window length includes measurement window lengths of various lengths, and the obtaining module is further specifically configured to obtain the measurement window length according to a level of a quality of service parameter of a data packet to be transmitted, and a correspondence between the measurement window lengths of various lengths and the level of the quality of service parameter of the data packet to be transmitted.

21. The terminal device according to claim 12, wherein the congestion status information includes a channel congestion rate, and the obtaining module is further specifically configured to obtain, by the terminal device, the quality of service parameter of the data packet to be transmitted if the channel congestion rate is greater than or equal to a fourth threshold;

the obtaining module is further specifically configured to use, as the first resource, a resource whose qos parameter is less than or equal to a qos parameter of the data packet to be transmitted, in resources associated with a second resource allocation manner that is different from the first resource allocation manner.

22. The terminal device according to any of claims 12-14,

23. A communication apparatus, characterized in that the communication apparatus comprises:

at least one processor, a memory;

the memory stores program instructions that are executed in the at least one processor to implement the functionality of the terminal device in the method of any of claims 1-11.

24. A computer storage medium having stored thereon program instructions which, when executed, implement the functionality of a terminal device as recited in any of claims 1-11.