WO2022188686A1

WO2022188686A1 - Communication method and device

Info

Publication number: WO2022188686A1
Application number: PCT/CN2022/078991
Authority: WO
Inventors: 张彦清; 李雪茹
Original assignee: 华为技术有限公司
Priority date: 2021-03-08
Filing date: 2022-03-03
Publication date: 2022-09-15
Also published as: CN115038126A

Abstract

The embodiments of the present application provide a communication method and device. In the method, a terminal device can dynamically determine, according to the remaining data volume and remaining transmission time of service data of a target service, a PBR corresponding to the target service, so as to transmit the service data according to the PBR, wherein the remaining transmission time is the difference between a target transmission duration determined according to a transmission delay of the target service and a duration for transmitting the service data. Since the PBR of the target service dynamically changes according to the requirement for a transmission rate of the service data, by means of the method, the probability of transmitting all service data within a specified transmission delay of the target service can be improved as much as possible. In conclusion, by means of the method, the transmission delay of service data of a terminal device can be ensured, and the user experience of a service can be improved.

Description

A communication method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number of 202110250199.3 and the application title of "a communication method, terminal and network equipment" filed with the China Patent Office on March 08, 2021, the entire contents of which are incorporated herein by reference In application; this application claims the priority of the Chinese patent application filed on June 11, 2021 with the application number 202110655744.7 and the application name is "a communication method and device", the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and device.

Background technique

In a communication system, three main channels are defined, namely: logical channel, transport channel and physical channel. The logical channel is used to provide data transmission services, and different logical channels are defined for different data transmission services; the transmission channel is used to define the method and characteristics of data transmission in the air interface, and the physical channel is used to define the bearer of the signal transmitted in the air interface. . In practical applications, multiple logical channels can be multiplexed on the same transport channel, that is, service data on multiple logical channels can be scheduled to the same transport channel and then transmitted through the physical channel.

When a communication device in a communication system sends service data, the media access control (MAC) layer needs to schedule the MAC service data unit (SDU) in the logical channel to the MAC protocol data in the transmission channel. Unit (protocol data unit, PDU). At present, the token bucket mechanism is used in the communication system to realize the resource mapping from the logical channel to the transmission channel. When multiple logical channels in a communication device are mapped to the same transport channel, the resource mapping process is:

According to the descending order of the priorities of the multiple logical channels allocated by the network device, and sequentially according to the number of tokens contained in the token bucket corresponding to each logical channel, the service data in the MAC SDU of each logical channel is mapped to the transmission on the MAC PDU of the channel. The number of tokens contained in the token bucket corresponding to each logical channel directly affects the data volume of the service data mapped by the logical channel.

In the token bucket mechanism, in order to realize that the service data in the logical channel can be continuously multiplexed to the transmission channel, the tokens in the token bucket corresponding to each logical channel are based on the speed-prioritized bit rate (PBR) increase evenly. The PBR is a static minimum guaranteed bit rate allocated by the network device side for the logical channel, and this value is a fixed value.

To sum up, the PBR configured by the network device for each logical channel directly affects the rate at which the service data in the logical channel is mapped to the transmission channel, thereby affecting the service data transmission delay of the service corresponding to the logical channel.

However, with the development of communication technology, and users have put forward higher requirements for quality of service (QoS), the terminal equipment in the communication system is required to have a higher or more flexible transmission rate. For example, the real-time broadband communication (RTBC) scenario is designed to support large bandwidth and low latency. The purpose is to increase the bandwidth under a given latency and certain reliability requirements, and to create an immersive human interaction with the virtual world. experience. Among them, this scenario includes extended reality (extended reality, XR) services that require ultra-high bandwidth and ultra-low latency. Because the XR service requires the terminal device to upload images, and the data volume of different images after encoding fluctuates greatly (for example, in a group of picture (GOP), the data volume of the encoded I-frame image is large, while the Generally, the data volume of the encoded P frame image is small), but the transmission delay requirements of each frame image are the same. The bit rate is set, therefore, the image with a large amount of data may not be fully transmitted within the set transmission delay. Therefore, the PBR static allocation method of the logical channel in the above token bucket mechanism will greatly affect the transmission delay of the XR service, thereby reducing the user experience of the service.

SUMMARY OF THE INVENTION

The present application provides a communication method and device, which are used to ensure the transmission delay of service data of a terminal device and improve the user experience of the service.

In the first aspect, an embodiment of the present application provides a communication method, which can be applied to a sending end that sends service data in the communication system shown in FIG. 4 , for example, a terminal device in the uplink direction of a mobile communication system or a network device in the downlink direction. , another example is any terminal device in the sidelink communication system. The method is described below by taking a communication device as an example, and the method includes the following steps:

The communication device determines the remaining data volume of the first service data of the target service and the first remaining transmission time of the first service data; and then determines the corresponding target service according to the remaining data volume and the first remaining transmission time The first priority bit rate PBR; wherein, the first remaining transmission time is the difference between the first target transmission duration and the duration of transmitting the first service data; the first target transmission duration is determined according to the transmission delay of the target service.

Through this method, the communication device can dynamically determine the PBR corresponding to the target service according to the remaining data volume and the remaining transmission time of the service data of the target service, so as to transmit the service data according to the PBR; wherein, the remaining transmission time is determined according to the target service The difference between the target transmission duration determined by the transmission delay and the duration elapsed for transmitting the service data. Since the PBR of the target service changes dynamically according to the requirement of the transmission rate of service data, this method can improve the probability of all transmission of service data within the specified transmission delay of the target service as much as possible. In a word, the method can ensure the transmission delay of the service data of the communication device and improve the user experience of the service.

In a possible design, when the communication device is a terminal device in a mobile communication system or a sidelink communication system, the communication device may receive indication information from a network device, where the indication information is used to indicate the target service transmission delay.

In this way, the network device can configure the transmission delay of the target service for the terminal device, so that when the terminal device sends each service data, the target transmission duration of the service data can be determined according to the transmission delay of the target service.

In a possible design, after determining the first PBR corresponding to the target service, the communication device may also perform the following steps according to the PBR:

According to the first PBR, the value of a first variable (that is, the number of tokens corresponding to the target logical channel) is increased, and the first variable corresponds to the target logical channel; wherein, the target logical channel corresponds to the target service a logical channel; according to the value of the first variable, multiplex the remaining data of the first service data to a target transmission channel; wherein, the target transmission channel is a transmission channel corresponding to the target logical channel.

With this design, the communication device can use the token bucket mechanism to transmit the remaining data of the first service data according to the calculated first PBR.

In a possible design, after the communication device multiplexes the remaining data of the first service data into the target transmission channel, the communication device may further determine the size of the first service data multiplexed into the target transmission channel. the total size; and then reduce the value of the first variable according to the total size of the first service data multiplexed to the target transmission channel.

Through this design, the communication device can update the value of the first variable according to the amount of data multiplexed to the target transmission channel each time.

In a possible design, when the communication device multiplexes part of the remaining data of the first service data into the target transmission channel according to the value of the first variable, the communication The device may also reduce the remaining data amount of the first service data according to the total size of the partial data; and reduce the first service data according to the time consumed by multiplexing the partial data to the target transmission channel this time. a remaining transmission time; then when the first remaining transmission time is greater than 0, according to the updated remaining data volume of the first service data and the first remaining transmission time, the first remaining transmission time corresponding to the target service is determined. Two PBR.

Through this design, the communication device can continue to dynamically calculate the PBR when the first service data is not all multiplexed into the target transmission channel, so that the newly calculated PBR can be used to continue to transmit the remaining data of the first service data.

In a possible design, when the first remaining transmission time is less than or equal to a judgment threshold (take 0 as an example), the communication device may also discard the remaining data of the first service data.

When the first remaining transmission time is less than or equal to the judgment threshold, it indicates that the current actual transmission time of the first service data has not met the transmission delay requirement of the target service. With this design, the communication device no longer multiplexes the remaining data of the first service data to the target transmission channel, so that the vacated resources can be used to continue multiplexing the next service data to the target transmission channel.

In a possible design, when the first remaining transmission time is less than or equal to a judgment threshold (take 0 as an example), the communication device may also, according to the last calculated PBR (that is, the first PBR), Increase the value of the first variable.

Since the first remaining transmission time is less than or equal to the judgment threshold, the communication device can no longer dynamically calculate the PBR. Therefore, the communication device can select the last calculated PBR to continue to increase the value of the first variable, so as to continue to transmit the remainder of the first service data. data.

In a possible design, when the first service data times out, if the communication device continues to describe the remaining data of the first service data; then in order to ensure the next service data (second service data) after the first service data as much as possible The transmission duration can meet the requirements of the transmission delay of the target service as much as possible, and the communication device can start the timing of the occupation duration according to the arrival time of the second service data, as shown in the following two ways:

Manner 1: Before the first remaining transmission time is less than or equal to 0, determine that the second service data of the target service reaches the target logical channel; when the first remaining transmission time is less than or equal to 0, start to Occupy time for timing;

Method 2: After the first remaining transmission time is less than or equal to 0, and before all the first service data is multiplexed to the target transmission channel, determine that the second service data of the target service arrives at the target logic channel; when the second service data arrives, start timing the occupied duration;

After starting the timing of the occupied time, when all the first service data is multiplexed to the target transmission channel, the communication device stops timing the occupied time; then the communication device initializes the remaining data of the second service data The amount is the total data amount of the second service data, and the second remaining transmission time of the second service data is initialized as the second target transmission duration; wherein, the second target transmission duration is the transmission of the target service and determining the third PBR corresponding to the target service according to the remaining data amount of the second service data and the second remaining transmission time.

With this design, if the second service data arrives before the first service data is all multiplexed to the target transmission channel, the communication device can sample the above design to count the occupied time of the first service data. In this way, when all the first service data is multiplexed to the target transmission channel and the communication device starts to multiplex the second service data to the target transmission channel, the second target transmission duration of the second service data can be set equal to the duration of the target service. The difference between the transmission delay and the occupied duration of the first service data. Through the occupied time deduction mechanism, it can be ensured that the actual transmission time of the second service data is close to the second target transmission time, and then all the second service data is multiplexed to the target transmission channel within the transmission delay requirement of the target service.

In a second aspect, an embodiment of the present application provides a communication method, the method can be applied to a network device, and the method includes the following steps:

The network device determines the transmission delay of the target service; and then sends indication information to the terminal device, where the indication information is used to indicate the transmission delay of the target service.

Through this method, the network device can configure the transmission delay of the target service for the terminal device, so that when the terminal device sends each service data, the target transmission duration of the service data can be determined according to the transmission delay of the target service.

In a third aspect, an embodiment of the present application provides a communication apparatus, including a unit for performing the steps of the method provided in any of the above aspects of the present application.

In a fourth aspect, an embodiment of the present application provides a communication device, comprising at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to execute any An aspect provides the steps of a method.

In a fifth aspect, an embodiment of the present application provides a communication system, including: a terminal device for implementing the method provided in the first aspect above, and a network device for implementing the method provided in the second aspect above.

In a sixth aspect, an embodiment of the present application further provides a computer program, which, when the computer program runs on a computer, causes the computer to execute the method provided in any of the foregoing aspects.

In a seventh aspect, an embodiment of the present application further provides a computer storage medium, where a computer program is stored in the computer storage medium, and when the computer program is executed by the computer, the computer is made to execute the method provided in any of the above aspects.

In an eighth aspect, an embodiment of the present application further provides a chip, where the chip is configured to read a computer program stored in a memory, and execute the method provided in any of the foregoing aspects.

In a ninth aspect, an embodiment of the present application further provides a chip system, where the chip system includes a processor for supporting a computer device to implement the method provided in any one of the foregoing aspects. In a possible design, the chip system further includes a memory for storing necessary programs and data of the computer device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a tenth aspect, an embodiment of the present invention provides an apparatus, including a unit for executing the method described in any embodiment of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of an encoding method of an image frame in a GOP provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of the data volume after encoding of each graphic frame in a GOP provided by an embodiment of the present application;

FIG. 3 is an example diagram of MAC layer scheduling of a terminal device according to an embodiment of the present application;

FIG. 4 is an architectural diagram of a communication system provided by an embodiment of the present application;

5 is a schematic diagram of a network topology of a communication system according to an embodiment of the present application;

6A is a flowchart of a communication method provided by an embodiment of the present application;

6B is a schematic diagram of a dynamic PBB and a static PBR variation curve provided by an embodiment of the application;

FIG. 7 is an example flowchart of a communication method provided by an embodiment of the present application;

FIG. 8 is an example diagram of MAC layer scheduling of a terminal device according to an embodiment of the present application;

FIG. 9 is a structural diagram of a communication device according to an embodiment of the present application.

Detailed ways

The present application provides a communication method and device, which are used to ensure the transmission delay of service data of a terminal device and improve the user experience of the service. The method and the device are based on the same technical concept. Since the principles of the method and the device for solving problems are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated.

Hereinafter, some terms in the present application will be explained so as to facilitate the understanding of those skilled in the art.

1) A network device is a device that connects a terminal device to a wireless network in a communication system. The network device, as a node in a wireless access network, may also be called a base station, may also be called a radio access network (radio access network, RAN) node (or device), or an access point (access point, AP).

At present, some examples of network equipment are: generation Node B (gNB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), access point (access point, AP) base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (such as , home evolved NodeB, or home Node B, HNB), or base band unit (base band unit, BBU), enterprise LTE discrete narrowband aggregation (Enterprise LTE Discrete Spectrum Aggregation, eLTE-DSA) base station, etc.

In addition, in a network structure, the network device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node. This structure separates the protocol layers of the eNB in the long term evolution (LTE) system. The functions of some protocol layers are centrally controlled by the CU, and the remaining part or all of the functions of the protocol layers are distributed in the DU, which is controlled by the CU. Centralized control of DU.

2) A terminal device is a device that provides voice and/or data connectivity to users. A terminal device may also be called a user equipment (user equipment, UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), and the like.

For example, the terminal device may be a handheld device with a wireless connection function, various in-vehicle devices, a roadside unit, and the like. At present, some examples of terminal devices are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), smart point of sale (POS), wearable device, Virtual reality (VR) equipment, augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, remote medical surgery wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, Smart meters (smart water meter, smart electricity meter, smart gas meter), eLTE-DSA UE, equipment with integrated access and backhaul (IAB) capability, on-board electronic control unit (ECU) etc., on-board computer, on-board cruise system, telematics box (T-BOX), etc.

3) A communication device is a device with a communication function in a communication system, which may be a network device or a terminal device, which is not limited in this application.

4), channel (channel), the channel of communication, is the medium of signal/data transmission. There are mainly three kinds of channels defined in the communication system, namely logical channel, transport channel and physical channel. The different types of channels are described below:

Logical channels are used to provide data transmission services. Different logical channels are defined for different data transmission services, such as common transaction channel (CTCH), dedicated transaction channel (DTCH), and broadcast control channel (broadcast). control channel, BCCH), common control channel (common control channel, CCCH), etc.

Transport channels are used to define the way and characteristics of data transmission in the air interface, such as random access channel (RACH), downlink shared channel (DSCH), uplink shared channel (USCH) , broadcast channel (broadcast channel, BCH), common packet channel (common packet channel, CPCH), etc.

The physical channel is used to define the bearer of the signal transmitted in the air interface. For example, the physical channel can define specific time-domain resources and frequency-domain resources, scrambling codes, and so on. Exemplarily, the physical channels may include: a physical random access channel (PRACH), a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), a physical uplink shared channel (PUSCH), and a physical uplink shared channel (PUSCH). Common packet channel (physical common packet channel, PCPCH) and so on.

5) The amount of data is the value obtained by measuring the size of the data using the same unit of measurement set. In the embodiment of the present application, the measurement unit of the data amount may be, but is not limited to, a bit (bit, also referred to as a bit) and a byte (Byte). Among them, 1Byte=8bit.

6) Services, which are certain functions or services implemented by terminal equipment, or data streams related to services at the application layer are transmitted. Optionally, the services involved in the present application may be classified into different types according to different angles.

For example, services can be divided according to the severity of delay requirements, then services can be divided into ordinary services (services with transmission delay greater than or equal to the first threshold) and low-latency services (transmission delay less than the first threshold) , real-time services (transmission delay is less than the second threshold), etc. Wherein, the second threshold is smaller than the first threshold.

For another example, services may also be classified according to functions or types of services, and then services may be classified into data services, voice services, video services, XR services, and the like. Among them, the XR business mainly includes virtual reality (virtual reality, VR), augmented reality (AR), mixed reality (mixed reality, MR) and other virtual and reality interaction services. Terminal devices that support XR services are generally equipped with cameras to capture images of the current scene, and the terminal devices need to continuously upload the collected images. Therefore, XR services have higher requirements on the data transmission delay and bandwidth of the terminal devices.

For another example, when multiple data streams can be transmitted in the same function or service, services can also be divided according to the types of data streams. For example, if the service of the application layer includes video stream and audio stream, the video stream can be one service, and the audio stream can be another service.

For another example, no matter what kind of function or service the terminal device expects to implement, it needs to be implemented by the terminal device by establishing a connection with a corresponding data network (data network, DN). Moreover, when implementing different functions or services, the data networks that the terminal devices need to connect to are also different. Therefore, services can also be divided through the data network connected to the terminal equipment.

Based on the above theory, the embodiment of the present application does not limit the representation of services. The services can be divided by time delay requirements, by function or service type, by data stream type, or by The Data Network Number (DNN) division requested by the terminal device.

7) The transmission delay of the service, that is, the time delay requirement of the data packet of the service from the sending device to the receiving device, can reflect the QoS of the service. In this application, the transmission delay may also be referred to as an air interface packet delay budget (air interface packet delay budget), a delay upper limit, or an air interface delay, and the like.

Taking a mobile communication system composed of a UE and a base station as an example, the transmission delay of the service is the delay requirement from the UE MAC to the gNB/eNB packet arrival of the service data packet from the MAC layer of the UE to the base station.

8) Token, which is a resource used by the MAC layer scheduling process of the communication device to control the amount of transmitted data. It should be noted that, since the MAC layer of the communication device will increase the number of tokens according to the PBR, and the number of tokens will also be consumed in the process of data transmission, the number of tokens will change continuously, that is, the number of tokens is a variable. In this embodiment of the present application, the token data may also be referred to as a token quantity variable, a variable, or the like. Among them, changing the number of tokens can be understood as changing the value of the token quantity variable (or variable), increasing the number of tokens can be understood as increasing the value of the variable, and reducing the number of tokens can be understood as reducing the value of the variable.

For example, in the embodiment shown in FIG. 6A of the present application, the "first variable" is the number of tokens corresponding to the target logical channel.

9), "and/or", describe the association relationship of the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and B exists alone. Happening. The character "/" generally indicates that the associated objects are an "or" relationship.

It should be noted that the plural referred to in this application refers to two or more. At least one means one or more.

In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description, and should not be understood as indicating or implying relative importance, nor should it be understood as indicating or implied order.

In the following, in the implementation of the XR service, the terminal device sends service data as an example for description.

As shown in FIG. 1 , the service data of the XR service can be video coded using the H.264/H.265 video coding standard. Multiple images generated by the terminal device performing the XR service can be divided into multiple GOPs. Optionally, each GOP may contain the same number of images. The terminal device can perform intra-frame coding or inter-frame coding on each frame of image in each GOP. Referring to Figure 1, the first frame image in each GOP can be called an intra-frame coding frame, abbreviated as an I frame, which can be independently encoded and decoded; and subsequent frame images can be called inter-frame coding frames. (inter-frame coding frame), including: predictive coding frame (predicated frame) (referred to as P frame), bidirectional predictive coding frame (bidirectional predicted frame) (referred to as B frame). The inter-coded frame needs to be coded and decoded based on the previously coded image, so as to improve the codec compression performance and reduce the data volume of the transmitted service data.

Referring to FIG. 2 , the data amount of the encoded first frame image (ie, I frame) is significantly larger than that of the encoded subsequent frame image (ie, P frame or B frame). In addition, due to changes in the content of the images collected by the terminal device, the data amount of each encoded P frame is also different. For example, in FIG. 2 , the data amount of the encoded fourth frame image is about twice the data amount of the encoded second frame image.

The transmission delay of the XR service is the transmission delay of each frame of image, that is, the transmission delay of each frame of image is required to be the same (for example, 10 milliseconds), and the XR service has higher requirements on the transmission delay, so the amount of data is large. The images have more stringent requirements on the transmission rate. If the transmission rate of the terminal equipment for all images is the same, the terminal equipment may not be able to complete the transmission of the entire image (for example, the I frame in the GOP) within the specified transmission delay. This has a great impact on the XR service, and further reduces the user experience of the service.

It should be noted that the above XR services are only examples, and do not constitute a limitation that the methods provided in the embodiments of the present application can be applied to services. The methods provided in the embodiments of the present application can be applied to various services, for example, services with large fluctuations in the data volume of service data, services with strict requirements on transmission delay, etc. Specific examples are video call services, artificial intelligence (artificial intelligence) intelligence, AI) business, etc.

The token bucket mechanism is described below.

The token bucket mechanism is used in the communication system to limit the data traffic of the communication device to a specific bandwidth, that is, a certain number of tokens are placed in the token bucket, and one token is allowed to send a set amount of data (The following takes 1Byte as an example) data. Every time 1Byte of data is transmitted, a token needs to be removed from the token bucket. When there are no tokens in the token bucket, sending data of any size will be considered as exceeding the rated bandwidth of the communication device. It can be understood that the token bucket is like a pool, and the token is like water. The tokens in the token bucket can not only be removed, but also continuously added. In order to ensure that the communication device can continuously send data, it is necessary to continuously add tokens to the token bucket. Therefore, the increasing speed of the tokens in the token bucket also determines the speed at which the communication device sends data. For example, the bandwidth of the communication device is 1000 bytes per second (Bytes per second, Bps). As long as 1000 tokens are added to the token bucket every second, the bandwidth of the communication device can be guaranteed.

Those skilled in the art understand that when a communication device in a communication system sends service data, the MAC layer needs to schedule the service data carried in the MAC SDU located in the logical channel to the MAC PDU in the transmission channel.

In the token bucket mechanism, the MAC layer of the communication device needs to maintain a token bucket for each logical channel and parameters corresponding to the token bucket. Each token is used to transfer a set amount of data. Continue to take a token that can transmit 1Byte of data as an example. The parameters corresponding to each token bucket include: a variable of the number of tokens in the token bucket, PBR, and the depth of the token bucket (bucket size duration, BSD) (optional). Wherein, the PBR and the BSD are configured by the (radio resource control, RRC) layer of the network device in the communication system.

Among them, the PBR of any token bucket is the increase rate of tokens in the token bucket, that is, the number of tokens added to the token bucket per unit time. Since each token is used to transmit a fixed amount of data, the increase rate of the token can be represented by the transmission speed of the data. Exemplarily, PBR=8k Bps=8k tokens/sec.

The depth BSD of the token bucket, that is, the maximum capacity of the token bucket, the threshold of the maximum number of tokens that can be contained, or the maximum amount of data that can be transmitted according to the tokens in the token bucket. Optionally, BSD can be directly set to a set threshold for the number of tokens; or BSD can be represented by time, for example, in seconds (s) or milliseconds (ms); or directly set to a set threshold of data volume. Exemplarily, the BSD=100ms of a certain token bucket; when PBR=8k tokens/second, the number of tokens added every 1 millisecond is 8; therefore, the BSD=100ms=0.1s of the token bucket, Equivalent to PBR*0.1s=800 tokens, equal to 800Bytes.

It should be noted that, in the communication system, the communication device implements data exchange between the MAC layer and the physical layer according to the transmission time interval (TTI), and each TTI performs one transmission, or each TTI corresponds to a transmission moment . TTI may also be called a scheduling period or a transmission period, that is, two adjacent transmission times (transmission opportunity, scheduling opportunity). Exemplarily, the TTI may be 1 ms, 2 ms, 0.5 ms, or the like. It should be noted that in some mobile communication systems (such as 5G NR systems), the TTI may change.

In addition, for the process of continuously adding tokens in the token bucket, the present application can also introduce the concept of token increment time interval T (also called token increment period T). Optionally, the token increment time interval T may be the same as or different from the value of TTI, which is not limited in this application.

In summary, the number of tokens in the token bucket cannot exceed PBR*BSD, and in each T, the number of tokens in the token bucket increases at the rate of PBR*T.

In addition, in the case where multiple logical channels in a communication device (that is, a network device or a terminal device in a communication system) can be multiplexed into the same transmission channel, the RRC layer of the network device may also allocate each logical channel of the communication device priority. Among them, the priority of any logical channel determines the order in which the MAC SDU of the logical channel is scheduled to the MAC PDU of the transport channel among multiple logical channels, that is, the MAC SDU of the logical channel with higher priority will be preferentially scheduled to the MAC SDU in the PDU.

In addition, in order to prevent data of high-priority logical channels from occupying MAC PDU resources all the time, the RRC layer of the network device allocates corresponding PBRs for each logical channel of the communication device, so as to avoid the occurrence of low-priority logical channels that cannot be multiplexed to MAC PDU resources. Case.

It should be noted that when a communication device sends data, it generally processes the data in the order from high to low of the protocol stack, that is, the MAC SDU and the radio link control (RLC) PDU are in one-to-one correspondence of. That is, the size of the MAC SDU depends on the RLC PDU, and the RLC PDU is divided from the RLC SDU, and the segmentation criterion depends on the size of the MAC PDU. That is, the MAC layer can decide how much data in the RLC SDU is divided into one RLC PDU according to the idle resources in the MAC PDU (that is, determine the size of the RLC PDU (or MAC SDU)).

Therefore, the MAC layer of the communication device can use the token bucket algorithm to multiplex the MAC SDUs in the logical channel to the MAC PDUs of the transmission channel. In fact, it can be understood that the MAC layer uses the token bucket algorithm to multiplex the RLC SDUs in the logical channel. MAC PDU to the transport channel.

It should be noted that when the MAC layer divides the RLC SDU into at least one RLC PDU, it also configures a header (Header) for each RLC PDU. Therefore, compared with the data amount of the RLC SDU, the sum of the data amount of at least one RLC PDU obtained by dividing the RLC SDU will increase the data amount of at least one packet header. However, since the data volume of the packet header is generally small (for example, one packet header is 8 bits), it can be ignored relative to the data volume of the service data carried by the RLC SDU. To sum up, in the embodiments and examples of this application, only the amount of resources occupied by the MAC PDU (RLC SDU) occupied when the RLC SDUs are all multiplexed into the MAC PDU is equal to the amount of data carried by the RLC SDU as an example for description.

The MAC layer of the communication device can use the token bucket algorithm to realize multiplexing of multiple logical channels to the MAC layer transmission channel, that is, the amount of data multiplexed into the transmission channel from the logical channel is determined according to the number of tokens of each logical channel.

Optionally, the MAC layer of the communication device maintains a variable B _j for the jth logical channel, which indicates the number of tokens in the token bucket corresponding to the logical channel (that is, the number of tokens remaining in the token bucket). , or the number of tokens available in the token bucket), and each token is used to transfer a fixed amount of data. Among them, j is a non-negative integer used to identify the jth logical channel. _Bj is initialized to 0 when the jth logical channel is established, and PBR×T tokens are added in each T.

In some embodiments, during the MAC layer scheduling process performed by the communication device, it may be performed according to the following principles:

1. At a transmission moment, for all logical channels with B _j > 0, the MAC layer multiplexes the data in the multiple logical channels to the transmission channel according to the logical channel priority from high to low. When the target logical channel multiplexes the transport channel, the MAC layer multiplexes the data of the corresponding data amount in the RLC SDU of the target logical channel into the MAC PDU according to the value of B _j of the target logical channel.

2. After the transmission time, the MAC layer updates the B _j of the target logical channel according to the data volume of the data (hereinafter referred to as target data) multiplexed into the transmission channel in the target logical channel at the transmission time, that is, B _j =B _j -B', where B' is the number of tokens consumed by multiplexing the target data to the transmission channel, which is a non-negative number. B' is the data amount of the target data divided by the fixed amount of data each token can transmit. It should be noted that considering the process of multiplexing the data of the logical channel into the MAC PDU of the transport channel (ie, the MAC layer scheduling process), it is necessary to avoid segmenting the RLC SDU as much as possible, so B' can be greater than B _j .

3. After completing the above steps 1-2, if there are remaining idle resources in the MAC PDU, the MAC layer multiplexes the data in the logical channel into the remaining resources of the MAC PDU according to the descending order of the logical channel priority, and This process does not consume the token count of the logical channel. When all the data of the logical channel with the higher priority is multiplexed into the MAC PDU and there are idle resources in the MAC PDU, the data in the logical channel with the lower priority can continue to be multiplexed into the MAC PDU.

Taking FIG. 3 as an example below, the process of performing MAC layer scheduling by the communication device will be described in detail. As shown in Figure 3, from left to right are

logical channels

1, 2, and 3, and their priorities decrease in turn, and the corresponding token numbers are B1, B2, and B3, and B1, B2, and B3 are all greater than 0. In order to facilitate the distinction, the present application numbers the RLC SDUs in each logical channel, that is, RLC SDUs a-b, where a represents the logical channel, and b represents the number of the RLC SDUs in the logical channel. As shown in Figure 3, the RLC SDUs to be transmitted in logical channel 1 are recorded as RLC SDU1-1, RLC SDU1-2; the RLC SDUs to be transmitted in logical channel 2 are recorded as RLC SDU2-1, RLC SDU2-2, RLC SDU2-3; RLC SDUs to be transmitted in logical channel 3 are recorded as RLC SDU3-1 and RLC SDU3-2.

During resource multiplexing from MAC SDUs to MAC PDUs, the RLC SDUs in logical channel 1 with the highest priority are first multiplexed into MAC PDUs, as shown in Figure 3:

If the data amount of RLC SDU1-1 in logical channel 1 is greater than the amount of idle resources in the MAC PDU (that is, the amount of data that the idle resources can carry), the MAC layer will give priority to the data in the RLC SDU1-1 that is equal to the amount of idle resources in the MAC PDU. The amount of data is multiplexed into the MAC PDU (at this time, in the logical channel, the RLC SDU1-1 is segmented, the MAC PDU is full, and there are no more idle resources);

If the data amount of the RLC SDU1-1 in logical channel 1 is less than or equal to the amount of idle resources in the MAC PDU, the MAC layer preferentially multiplexes all the data in the RLC SDU1-1 to the MAC PDU.

If the MAC PDU idle resources are sufficient, after multiplexing all the data in the RLC SDU1-1 in the logical channel 1 into the MAC PDU, there are still idle resources in the MAC PDU, then the MAC layer continues to follow the above principles, the next token The RLC SDUs of the logical channel whose number is greater than 0 are multiplexed into the MAC PDU, that is, if B2>0, continue to multiplex the data in the RLC SDU2-1 in the logical channel 2 into the MAC PDU. By analogy, until there are no idle resources in the MAC PDU or all the RLC SDUs in the logical channels whose token data is greater than 0 are multiplexed into the MAC PDU.

Among them, after each transmission time, the MAC layer reduces the number of tokens B1, B2, B3 of each logical channel multiplexing transmission channel consumes according to the logical channel, and at each token increment time In the interval T, the speed increases according to PBR1*T, PBR2*T, and PBR3*T respectively. Among them, when the MAC layer multiplexes the data of a certain logical channel to the transmission channel, the number of tokens consumed (the data amount of the scheduled data/the fixed amount of data that can be transmitted by each token) is greater than the current token of the logical channel number, the token data for that logical channel will become negative. If the token data of the logical channel has not increased to a positive value at the next transmission moment, then at the next transmission moment, the MAC layer will re-multiplex all logical channels with the number of tokens greater than 0 according to the The priority of the logical channel is in descending order. The RLC SDU of the logical channel is multiplexed into the MAC PDU, that is, the logical channel has the opportunity to be multiplexed into the MAC PDU only after the logical channel data with a higher priority than the logical channel is all transmitted. .

In addition, the MAC layer multiplexes the RLC SDUs in the respective logical channels into the MAC PDUs according to the number of tokens in each logical channel. If there are still idle resources in the MAC PDUs at this time, the MAC layer continues to assign the logical channels according to the priority of the logical channel. The RLC SDU in the logical channel multiplexes the idle resources in the MAC PDU.

For example, as shown in Figure 3, after multiplexing the RLC SDUs in the three logical channels into the MAC PDU according to the number of tokens, and there are still idle resources in the MAC PDU, the MAC layer preferentially assigns the remaining data in logical channel 1 (at least one RLC SDU, the data in the remaining data only includes RLC SDU1-2 as an example) is multiplexed into the MAC PDU, regardless of the size of the token number B1 of the current logical channel 1, and this multiplexing does not consume logical channels 1 token, as shown in Figure 3, including:

If the amount of idle resources in the MAC PDU is greater than or equal to the data amount of the remaining data in the logical channel 1 (that is, the RLC SDU1-2), the MAC layer multiplexes all the data in the RLC SDU1-2 into the MAC PDU;

If the amount of idle resources in the MAC PDU is less than the data amount of the remaining data in logical channel 1 (that is, RLC SDU1-2), the MAC layer multiplexes part of the data in the RLC SDU1-2 equal to the amount of idle resources in the MAC PDU into the MAC PDU .

It should also be noted that if all the data in the remaining data in logical channel 1 is multiplexed into the MAC PDU, and the MAC PDU still has idle resources, then the MAC layer continues to multiplex the remaining data in logical channel 2 according to the above method. into the MAC PDU. ...and so on, until the MAC PDU no longer has idle resources or the remaining data in each logical channel is multiplexed into the MAC PDU. When the amount of idle resources in the MAC PDU is less than or equal to the data amount of the remaining data in logical channel 1, then the MAC layer multiplexes part or all of the remaining data in logical channel 1 into the MAC PDU. At this time, the MAC PDU cannot Residual data in multiplexing other logical channels.

Finally, the MAC layer transmits the MAC PDU to the physical layer for further transmission by the physical layer.

From the specific description of the traditional token bucket mechanism above, it can be known that the increase rate PBR of the token in the token bucket corresponding to each logical channel directly determines the transmission speed of the data in the RLC SDU in the logical channel. However, PBR is a fixed static variable allocated by the network device, and the network device may consider the average bit rate of the logical channel during allocation.

However, the data volume of service data generated in some services may fluctuate greatly. Taking the above XR service as an example, the data volume of different frame images in a GOP varies greatly, but the transmission delay requirement of each frame image is The same, so that each frame of images has different requirements on the transmission rate. In the traditional token bucket mechanism, the PBR is a fixed value, which may cause the transmission rate to fail to meet the transmission requirements of images with a large amount of data, thus increasing the transmission delay.

Continue to take FIG. 2 as an example for description. In the XR service, the data amount of each frame of image after encoding varies greatly, and the transmission delay requirements of each frame of image are the same. For example, the data volume of the first frame image after encoding is about 5 times that of the second frame image after encoding, which means that the transmission rate of the first frame image after encoding is expected to be the transmission rate of the second frame image after encoding. about 5 times. However, since the PBR is a fixed value, the transmission rate of the terminal device cannot be changed with the change of the transmission rate requirements of different images, and eventually some images with a large amount of data cannot be transmitted within the specified transmission delay.

In order to solve the impact on service data transmission caused by the PBR static allocation mode of the logical channel, ensure the transmission delay of service data, and improve the user experience of the service, the embodiments of the present application provide a communication method and device. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 4 shows the architecture of a possible communication system to which the communication method provided by the embodiment of the present application is applicable. Referring to FIG. 4 , the communication system includes: a network device, and at least one terminal device (terminal device a-terminal device g in FIG. 4 ).

The network equipment is an entity that can receive and transmit wireless signals on the network side, and is responsible for providing wireless access-related services for terminal equipment within its coverage, realizing physical layer functions, resource scheduling and wireless resource management, quality of service ( Quality of Service, QoS) management, wireless access control and mobility management functions. Optionally, the network device may be a base station, an AP or other RAN device, which is not limited in this application.

The terminal device is an entity capable of receiving and transmitting wireless signals on the user side, and needs to access the network through the network device. The terminal device can be various devices that provide voice and/or data connectivity for the user, for example, as shown in FIG.

Optionally, the communication system shown in FIG. 4 may support a sidelink (sidelink) communication technology. The sidelink communication technology is a near-field communication technology that enables direct connection between terminal devices, also known as a proximity services (proximity services, ProSe) communication technology, or a D2D communication technology. In the communication system, a plurality of terminal devices that are geographically close together and support sidelink communication may form a sidelink communication system (also referred to as a sidelink communication subsystem, a sidelink system, etc.). In the sidelink communication system, two terminal devices (also called sidelink devices) can communicate through a direct link (sidelink connection). The sidelink communication technology can support broadcast, multicast and unicast transmission within the coverage of network equipment, outside the coverage of network equipment, and in scenarios where network equipment is partially covered.

In the communication system shown in FIG. 4 , different sidelink communication systems can be formed for different application scenarios. For example, in the scenario where the user is driving a car, the user's smartphone can form a sidelink communication system with the in-vehicle equipment installed in the car, as shown in the figure. For another example, in a scenario where the user uses VR glasses and/or AR glasses to watch a movie, the user's smartphone and the VR glasses and/or VR glasses may form a sidelink communication system, as shown in the figure. For another example, in the scenario where the user uses the HMD to watch a movie, the user's smartphone and the HMD can form a sidelink communication system, as shown in the figure. In other scenarios, in-vehicle devices between different cars can also form a sidelink communication system, or mobile phones on different cars can form a sidelink communication system.

Based on the architecture of the communication system shown in FIG. 4 , an embodiment of the present application further provides a network topology architecture of the communication system, as shown in FIG. 5 . The network device and the terminal device may be connected through an air interface (ie, a Uu interface), so as to implement communication between the terminal device and the network device (this communication may be referred to as Uu communication, or cellular network communication). Between adjacent terminal devices, a direct link can be established for sidelink data transmission through the ProSe communication 5 (ProSe communication 5, PC5) interface.

Among them, both the Uu interface and the PC5 interface include a control plane protocol stack and a user plane protocol stack. The user plane protocol stack includes at least the following protocol layers: physical (PHY) layer, MAC layer, radio link control (radio link control, RLC) layer and packet data convergence protocol (packet data convergence protocol, PDCP) Layer, service data adaptation protocol (service data adaptation protocol, SDAP) layer; the control plane protocol stack at least includes the following protocol layers: physical layer, MAC layer, RLC layer, PDCP layer, radio resource control (radio resource control, RRC) Floor.

In the communication system shown in FIG. 4 , the terminal device can implement specific services by communicating with network devices or other terminal devices. For example, a smartphone can communicate with a network device to realize video calling services; VR glasses or AR glasses can communicate with a smartphone or network device to realize XR services, etc.

In the communication system shown in FIG. 4 , when any communication device (terminal device or network device) implements the target service, it can send service data of the target service to another communication device (network device or terminal device). Then in the process of sending service data, the MAC layer of the communication device can multiplex the service data carried by the RLC SDU in the logical channel to the MAC PDU in the transmission channel through the token bucket mechanism, so as to finally pass the Uu interface or PC5 interface. The physical channel is transmitted to another communication device.

Exemplarily, in the VR downlink transmission scenario, the network device can transmit VR service data to the terminal device through the token bucket mechanism; in the AR uplink and downlink transmission scenarios, the network device or the terminal device can use the token bucket mechanism to transmit VR service data to the terminal device. The token bucket mechanism transmits AR service data to the opposite end; in the sidelink communication system, any terminal device can transmit various service data to another terminal device through the token bucket mechanism.

It should also be pointed out that the communication system shown in FIG. 4 is taken as an example, and does not constitute a limitation on the communication system to which the method provided by the embodiment of the present application is applicable. In conclusion, the methods provided in the embodiments of the present application are applicable to communication systems or application scenarios of various types and standards. For example: The 5th Generation (5G) communication system, Long Term Evolution (LTE) communication system, Wi-Fi system, Vehicle to Everything (V2X), Long Term Evolution-Vehicle Networking (LTE) -vehicle, LTE-V), vehicle to vehicle (V2V), Internet of Vehicles, Machine Type Communications (MTC), Internet of Things (IoT), Long Term Evolution-Machine to Machine ( LTE-machine to machine, LTE-M), machine to machine (machine to machine, M2M), the embodiment of the present application is not limited.

The embodiment of the present application provides a communication method, which can be applied to the uplink direction in a mobile communication system composed of a terminal device and a network device (ie, the terminal device sends service data to the network device). The method will be described in detail below with reference to the flowchart shown in FIG. 6A .

S600a: The terminal device and the network device establish a wireless connection.

Optionally, the terminal device may, but is not limited to, establish an RRC connection with the network device in the following ways:

Mode 1: The terminal device can establish an RRC connection with the network device through processes such as cell search, time synchronization, random access, and RRC connection establishment.

Manner 2: The terminal device establishes an RRC connection with the network device through the process of cell selection, cell reselection or cell handover.

Mode 3: The terminal device in the RRC idle state (RRC_idle) or the RRC inactive state (RRC inactive) can establish/restore the RRC connection with the network device through the RRC connection establishment/restoration process. At this point, the terminal device enters the RRC connected state.

After the terminal device establishes an RRC connection with the network device, the network device may establish at least one data bearer (data resource bearer, DRB) of the terminal device based on the RRC connection, so as to transmit service data of at least one service of the terminal device. The data bearer is also called a radio bearer, and each data bearer corresponds to a logical channel in the MAC layer of the terminal device and the network device respectively. In order to establish a data bearer, the MAC layers of the terminal device and the network device need to establish a corresponding logical channel for each data bearer, so as to transmit the service data corresponding to the data bearer.

In an implementation manner, the terminal device may start executing the target service (that is, the terminal device opens a function, service or application that implements the target service, and requests to establish the target data bearer of the target service), through the above method An RRC connection is established, and a target data bearer for transmitting the service data of the target service is established with the network device. Wherein, in the process of establishing the target data bearer, the MAC layers of the terminal device and the network device establish a target logical channel corresponding to the target data bearer.

In another implementation manner, after the terminal device establishes the RRC connection with the network device, when the terminal device starts to execute the target service, it can send a bearer establishment request to the network device, so that the network device can establish a bearer establishment request for transmitting the target service. The target data bearer of the business data. Wherein, in the process of establishing the target data bearer, the MAC layers of the terminal device and the network device establish a target logical channel corresponding to the target data bearer.

It should be noted that the terminal device and the network device can establish/restore the RRC connection through the traditional RRC connection establishment/restoration process, and establish the target data bearer of the target service through the traditional wireless bearer establishment/modification process. The application examples are not repeated here.

S600b: The network device determines the transmission delay of the target service (that is, the air interface transmission delay of the target service), and sends indication information to the terminal device, where the indication information is used to indicate the transmission delay of the target service. The terminal device receives the indication information from the network device, and determines the transmission delay of the target service according to the indication information.

In this embodiment of the present application, when a terminal device requests a target service, the network device may determine the transmission delay of the target service in the following manner:

Manner 1: The network device stores transmission delays of multiple services, and the network device may determine the transmission delay of the target service requested by the terminal device from the transmission delays of the multiple services.

Optionally, the transmission delay of the multiple services may be factory-configured, or specified by a protocol, or configured for a core network device, which is not limited in this application.

Manner 2: The network device may first determine the target service requested by the terminal device, and then determine the transmission delay of the target service according to the QoS information of the target service. The QoS information of the target service may be acquired by the network device from the subscription information of the terminal device saved by the core network device, or configured by the core network device according to the subscription information of the terminal device.

For example, the indication information may be an RRC message, and the RRC message carries the transmission delay of the target service. For another example, the indication information may be downlink control information (DCI), and the DCI may include a first field that carries the transmission delay of the target service; or the DCI may include a first indication bit, the indication bit It is used to indicate the transmission delay of the target service.

It should also be noted that, S600b may be performed after performing S600a, or performed during the process of performing S600a, which is not limited in this application.

The steps of the communication method provided by the present application will be specifically described below by taking S601-S607 as an example for the terminal device to perform MAC layer scheduling based on the token bucket mechanism in the uplink transmission process of the target service.

S601: After the first service data of the target service reaches the target logical channel of the terminal device, in the process of multiplexing the first service data to the target transmission channel by the terminal device, the terminal device determines the remaining data amount of the first service data and the first The first remaining transmission time of a service data.

The first service data is any service data of the target service, and the target transmission channel is the transmission channel corresponding to the target logical channel. The first remaining transmission time is the difference between the first target transmission duration and the duration elapsed for transmitting the first service data, and the first target transmission duration is determined according to the transmission delay of the target service . The remaining data amount of the first service data is the data amount of remaining data in the first service data that has not been multiplexed to the target transmission channel.

Wherein, the elapsed time period for transmitting the first service data may be the sum of the TTIs elapsed by the terminal device from the moment when the terminal device starts to transmit the first service data to the current moment.

Exemplarily, after the first service data reaches the target logical channel, when the terminal device starts to transmit the first service data (the first service data has not been multiplexed at this time), the terminal device initializes the first service data. The remaining data volume of the service is the total data volume of the first service data, and the first remaining transmission time is initialized as the first target transmission duration.

In this embodiment of the present application, in order to ensure that the transmission duration of the first service data meets the transmission delay requirement of the target service as much as possible, the terminal device may set the first target transmission duration to be less than or equal to the target transmission duration The transmission delay of the service. Further, in order to make the transmission duration of the first service data as long as possible, the terminal device may set the first target transmission duration to be equal to the transmission delay of the target service.

Exemplarily, when the first service data is the first service data of the target service, or when the first service data arrives, all the previous service data has been multiplexed to the target transmission channel, or when the first service data arrives In the case that the remaining data of the previous service data is discarded, the terminal device may set the first target transmission duration to be equal to the transmission delay of the target service.

In another example, when the remaining transmission time of the previous service data of the first service data is less than or equal to 0 but there is still remaining data, the terminal device can continue to transmit the previous service data, then in this case, if the Before the first service data arrives before the previous service data is all multiplexed to the target transmission channel, the terminal device will count the occupied time of the previous service data. When all the previous service data is multiplexed into the target transmission channel, the terminal device may set the first target transmission duration to be equal to the difference between the transmission delay of the target service and the occupied duration of the previous service data.

In this embodiment of the present application, the terminal device may determine whether the first remaining transmission time of the first service data is greater than a judgment threshold after each time the terminal device determines/updates the first remaining transmission time of the first service data, where the judgment threshold is used to judge whether the service data times out , the judgment threshold can be set by the user, or stipulated by the protocol, or configured for the network equipment, or factory-configured by the terminal equipment, or default in the field; the judgment threshold is usually 0, but this The application does not limit the value of the judgment threshold. The first remaining transmission time is greater than the judgment threshold, indicating that the actual transmission time of the current first service data meets the transmission delay requirement of the target service; and the first remaining transmission time is less than or equal to the judgment threshold, indicating that the actual transmission time of the current first service data has not been longer. Meet the transmission delay requirements of the target service. It should also be noted that the embodiments of the present application do not limit the value of the judgment threshold of the first remaining transmission time, and the embodiments of the present application use 0 as an example for description. In other scenarios, the judgment threshold may also be other set values. .

Steps S602 and S604 performed by the terminal device under the condition that the first remaining transmission time is greater than 0 will be described below.

S602: The terminal device determines the first PBR according to the remaining data amount of the first service data and the first remaining transmission time.

The first PBR represents the increasing speed of tokens in the token bucket corresponding to the target logical channel, that is, the increasing speed of the number of tokens corresponding to the target logical channel (hereinafter referred to as the first variable). Therefore, when the first PBR is represented by the amount of data added per unit time, the first PBR=the remaining data amount of the first service data/the first remaining transmission time; Indicated by the number of cards, and when one token is used to transmit data with a set data volume (for example, 1Byte, 2Byte, 1bit, etc.), the first PBR=(the remaining data volume of the first service data/the set data volume)/the first PBR a remaining transmission time.

Exemplarily, when the first service data has not been multiplexed yet, the terminal device initializes the remaining data volume of the first service as the total data volume of the first service data, and initializes the first remaining transmission time as the total data volume of the first service data. The first target transmission duration is described, therefore, the first PBR=the total data volume of the first service data/the first target transmission duration, or the first PBR=(the total data volume of the first service data/the set data volume)/the first target transmission duration A target transmission duration.

S603: The terminal device increases the value of the number of tokens (ie, the first variable) corresponding to the target logical channel according to the first PBR. That is, in each token increment time interval T, the terminal device increases the first variable by the first PBR*T. The terminal device may, at the first transmission moment, multiplex the remaining data of the first service data to the target transmission channel according to the value of the first variable.

Wherein, at the first transmission moment, the value of the first variable is greater than 0.

Since the first service data can be carried in multiple RLC SDUs, in the process of multiplexing the remaining data of the first service data to the target transmission channel according to the value of the first variable, the terminal device needs to avoid as much as possible to RLC SDU fragmentation.

In this embodiment of the present application, at each transmission moment, the process of multiplexing service data to the target transmission channel by the terminal device according to the value of the first variable is the same as the multiplexing process in the traditional token mechanism. Therefore, refer to The process shown in FIG. 3, or the specific description about the multiplexing process in the example shown in FIG. 7 or FIG. 8 (for example, the description in S704 in the example shown in FIG. The descriptions in A3 and A4), which will not be repeated here.

In a word, when multiple logical channels including the target logical channel multiplex the target transport channel, the following principles need to be satisfied:

1. At each transmission moment, for all logical channels whose number of tokens is greater than 0, the terminal device, in the order of logical channel priority from high to low, sequentially assigns the number of tokens in each logical channel according to the number of tokens in each logical channel. The data is multiplexed to the target transmission channel;

2. After each transmission moment, for each logical channel, subtract the corresponding number of tokens from the number of tokens according to the total size of the data multiplexed to the target transmission channel in the previous step;

3. After completing the above steps, if there are remaining idle resources in the target transmission channel, the terminal device continues to multiplex the data in the logical channel into the remaining resources of the target transmission channel according to the descending order of the logical channel priority, and This process does not consume the token count of the logical channel.

In addition, in the process of resource allocation, in order to minimize the overhead caused by RLC SDU segmentation, the following principles need to be followed:

1. If the entire RLC SDU can be transmitted in the idle resources of the MAC PDU of the target transport channel, the RLC SDU will not be segmented;

2. If the terminal device segments an RLC SDU, the length of the segment should be maximized according to the amount of free resources of the MAC PDU;

3. The terminal device should transmit as much data as possible, that is, multiplex the data in the logical channel as much as possible in the MAC PDU.

Through this S603, the terminal device can multiplex the remaining data of the first service data to the target transmission channel, and then can transmit the first service data to the base station through the physical channel.

S604: After the first transmission time, the terminal device reduces the value of the first variable according to the total size (total size) of the first service data multiplexed to the target transmission channel at the first transmission time.

It should be noted that, according to the above-mentioned third principle of multiplexing the target transmission channel, the total size of the first service data here is only the size of the first service data multiplexed to the target transmission channel according to the value of the first variable. total size. When there are still idle resources in the target transmission channel, when continuing to multiplex the first service data to the target transmission channel according to the priority of the target logical channel, it is not necessary to reduce the value of the first variable.

When the data of the set data volume continues to be transmitted with each token, in S604, the decrement of the first variable is the total size of the first service data/the set data volume, that is, the first variable = the first variable - the first variable Decrease of the variable (total size of the first service data/set data amount).

Through S602-S604, the terminal device can dynamically determine the first PBR of the target logical channel according to the remaining data volume and remaining transmission time of the first service data, so that the value of the first variable can be increased according to the first PBR, so that, At the first transmission moment, the remaining data of the first service data may be multiplexed to the target transmission channel according to the value of the first variable, so as to realize the transmission of the first service data.

As shown in FIG. 6A , when the terminal device multiplexes part of the remaining data of the first service data to the target transmission channel in S603 (that is, not all the first service data is multiplexed to the target transmission channel), then After S604, the terminal device continues to perform S601, so that it can continue to pass through S602-S604 to dynamically update the first PBR, and continue to multiplex the remaining data in the first service data to the target according to the dynamically updated first PBR transmission channel.

Wherein, when the terminal device continues to execute S601, it includes:

The terminal device may update the remaining data amount of the first service data according to the total size of the partial data multiplexed to the target transmission channel in S603; time, update the first remaining transmission time.

It should be noted that, if the terminal device multiplexes the remaining data of the first service data into the target transmission channel according to the value of the first variable in S603, there are still idle resources in the target transmission channel, then the terminal device continues according to the value of the target logical channel. priority, multiplexing the remaining data in the first service data to the target transmission channel. In this case, the terminal device may update the data of the first service data according to the total size of the partial data multiplexed into the target transmission channel in S603 and the data volume of the first service data that is continuously multiplexed into the target transmission channel amount of data remaining.

Wherein, according to the time consumed for multiplexing the partial data to the target transmission channel this time, updating the first remaining transmission time includes:

The terminal device updates the first remaining transmission time according to the TTI corresponding to the first transmission moment. That is, the first remaining transmission time is updated to be the first remaining transmission time minus the TTI.

The steps performed by the terminal device under the condition that the first remaining transmission time is less than or equal to 0 are described below. As shown in FIG. 6A , the embodiment of the present application provides two solutions.

Option One:

S605: When the terminal device determines that the first remaining transmission time of the first service data is less than or equal to 0, the terminal device discards the remaining data of the first service data.

Since the first service data is not fully transmitted within the transmission delay of the target service, in some cases, the target service no longer needs the remaining data of the first service data. The remaining data of the first service data is multiplexed to the target transmission channel, so that the vacated resources can be used to continue multiplexing the next service data to the target transmission channel.

For example, in the video service of the terminal device, a certain frame of image is not fully transmitted to the network device within the set transmission delay. At this time, the processing/display time of the frame image has elapsed, and the processing/display is no longer required. Transmitting that frame of image also doesn't improve the user experience. Therefore, in order to avoid wasting resources and avoid affecting the transmission delay of the image of the next frame, the remaining data in the image of the frame may be discarded.

It should be noted that, in the scenario where the terminal device adopts solution 1, when the first remaining transmission time of the first service data is greater than 0, the next service data (referred to as the second service data) of the first service data reaches the target logical channel, the terminal device needs to continue to multiplex the remaining data of the first service data to the target transmission channel until the first remaining transmission time of the first service data is less than or equal to 0. When the first remaining transmission time of the first service data is less than or equal to 0, if the first service data has not been fully transmitted, the terminal device discards the remaining data of the first service data, and starts to start the second service data through the following steps. Service data is multiplexed to the target transmission channel:

Initializing the remaining data volume of the second service data as the total data volume of the second service data, and initializing the second remaining transmission time of the second service data as the second target transmission duration; wherein the second The target transmission duration may be equal to the transmission delay of the target service;

A second PBR corresponding to the target service is determined according to the remaining data amount of the second service data and the second remaining transmission time.

Afterwards, similar to S603-S604, the terminal device may increase the value of the first variable according to the second PBR, and multiplex the second service data to the target transmission channel according to the value of the first variable.

In a word, the terminal device can refer to the above S601-S607, dynamically update the second PBR according to the remaining data volume of the second service data and the second remaining transmission time, and multiplex the second service data according to the dynamically updated second PBR to the target transmission channel, which will not be repeated here.

Of course, if the terminal device discards the remaining data of the first service data when the first remaining transmission time is less than or equal to 0, or after the terminal device multiplexes all the first service data to the target transmission channel, the second service data arrives target logical channel, the terminal device also needs to adopt the above steps to initialize the remaining data volume and the second remaining transmission time of the second service data, and determine the second PBR, etc., the specific process will not be repeated here.

Option II:

S606: The terminal device increases the value of the first variable according to the last calculated first PBR; at the second transmission moment, multiplexes the remaining data of the first service data to the target transmission channel according to the value of the first variable.

Because the first remaining transmission time is less than or equal to 0, the terminal device can no longer dynamically calculate the first PBR. Therefore, the terminal device can select the last calculated first PBR to continue to increase the value of the first variable.

It should be noted that, S606 is an optional step. Optionally, when the first remaining transmission time is less than or equal to 0, the terminal device may also use the PBR statically configured by the network device to increase the value of the first variable, which is not limited in this application.

S607: After the second transmission time, the terminal device reduces the value of the first variable according to the total size of the first service data multiplexed to the target transmission channel at the second transmission time.

In this solution, the terminal device multiplexes the remaining data of the first service data to the target transmission channel according to the value of the first variable, and the process of reducing the value of the first variable may refer to the description in the above S603-S604, It will not be repeated here.

As shown in the figure, in the case that the first remaining transmission time is less than or equal to 0, the terminal device may execute S606-S607 cyclically to continuously multiplex the remaining data of the first service data to the target transmission channel.

In scheme 2, since the actual transmission duration of the first service data does not meet the transmission delay requirement of the target service, in order to avoid affecting the transmission of the next service data (hereinafter referred to as the second service data), this application implements The example provides a deduction mechanism for occupied time.

In this mechanism, if the second service data arrives before all the first service data is multiplexed to the target transmission channel, the terminal device will count the occupied time of the first service data. When all the first service data is multiplexed to the target transmission channel and the terminal device starts to multiplex the second service data to the target transmission channel, the second target transmission duration of the second service data can be set equal to the transmission time of the target service The difference between the delay and the occupied duration of the first service data.

The difference in the arrival time of the second service data below will explain the timing method of the occupied time:

Manner 1: Before the first remaining transmission time is less than or equal to 0, it is determined that the second service data of the target service arrives at the target logical channel. In this case, when the first remaining transmission time is less than or equal to 0, the terminal device starts to count the occupied duration.

Method 2: After the first remaining transmission time is less than or equal to 0, and before all the first service data is multiplexed to the target transmission channel, determine that the second service data of the target service arrives at the target logic channel. In this case, when the second service data arrives, the terminal device starts to count the occupied duration.

In addition, when all the first service data is multiplexed to the target transmission channel, the terminal device stops timing the occupied duration; and starts to multiplex the second service data to the target transmission channel through the following steps:

Initializing the remaining data volume of the second service data as the total data volume of the second service data, and initializing the second remaining transmission time of the second service data as the second target transmission duration; wherein the second The target transmission duration is the difference between the transmission delay of the target service and the occupied duration;

In the scenario where the terminal device adopts solution 2, if the second service data arrives at the target logical channel after the first service data is all multiplexed into the target transmission channel, the terminal device starts to start the second service through the following steps. Service data is multiplexed to the target transmission channel:

Finally, it should be understood that the above-mentioned terminal device performs the MAC layer scheduling process may be specifically performed by the MAC layer of the terminal device, or performed for other protocol layers, which is not limited in this application.

An embodiment of the present application provides a communication method, in which a terminal device can dynamically determine a PBR corresponding to a target service according to the remaining data volume and remaining transmission time of service data of the target service, so as to transmit the service according to the PBR data; wherein, the remaining transmission time is the difference between the target transmission duration determined according to the transmission delay of the target service and the duration elapsed for transmitting the service data. Since the PBR of the target service changes dynamically according to the requirement of the transmission rate of the service data, as shown in FIG. 6B , compared with the PBR static allocation method, this method can improve the transmission delay within the specified target service as far as possible. The probability that all traffic data is transmitted. In a word, the method can ensure the transmission delay of the service data of the terminal device and improve the user experience of the service.

The embodiment of the present application provides another communication method, which can be applied to the downlink direction in a mobile communication system composed of a terminal device and a network device (ie, the network device sends service data to the terminal device). In this method, after the network device establishes a wireless connection with the terminal device, the transmission delay of the target service is determined. The specific process can refer to the descriptions in S600a and S600b in FIG. 6A , which will not be described here.

After that, the MAC layer of the network device can dynamically determine the PBR corresponding to the target service according to the steps in S601-S607, according to the remaining data volume and remaining transmission time of the first service data of the target service, so as to transmit the first service according to the PBR. Service data; wherein, the remaining transmission time is the difference between the target transmission duration determined according to the transmission delay of the target service and the duration elapsed for transmitting the first service data. The process can be described in detail with respect to the corresponding steps in the embodiment shown in FIG. 6A , which will not be described here.

The embodiment of the present application also provides another communication method, which can be applied to a sidelink communication system composed of multiple terminal devices. In this method, after the two terminal devices establish a sidelink connection, the MAC layer of the first terminal device (sending device) determines the transmission delay of the target service, and adopts the steps in S601-S607 to send the service data of the target service to For the second terminal device (receiving device), reference may be made to the specific description in the embodiment shown in FIG. 6A for the specific process, which will not be repeated here.

It should be noted that the first terminal device may, but is not limited to, determine the transmission delay of the target service in the following ways:

Manner 1: When the transmission mode adopted by the sidelink system is mode1, the network device may send indication information to the first terminal device, where the indication information is used to indicate the transmission delay of the target service.

Mode 2: When the transmission mode adopted by the sidelink system is mode2, the RRC layer or the PDCP layer of the first terminal device can determine the transmission delay of the target service and configure it to the MAC layer of the first terminal device; A terminal device stores the transmission delay of multiple services, and after starting the target service, determines the transmission delay of the target service; or the second terminal device sends indication information to the first terminal device, and the indication information is used to indicate the target service. The transmission delay of the service.

Based on the embodiment shown in FIG. 6A , the present application also provides an example of a communication method. In this example, a mobile communication system including a terminal device and a base station is taken as an example. In the process of transmitting XR service data to the base station by the terminal device, the MAC layer is performed. Taking scheduling as an example, it will be described with reference to the flowchart shown in FIG. 7 .

S700: After the base station establishes a wireless connection with the terminal device, the base station allocates the transmission delay of the XR service to the terminal device.

Optionally, the base station may establish an RRC connection with the terminal device according to the description in S600a in the embodiment shown in FIG. 6A , and establish the data bearer of the XR service based on the RRC connection. Wherein, in the process of establishing the data bearer, the MAC layer of the base station and the terminal device establishes a target logical channel corresponding to the data bearer.

In this step, the base station may determine the transmission delay of the XR service in the manner described in S600b, and send indication information indicating the transmission delay of the XR service to the terminal device. In this way, the terminal device can determine the transmission delay of the XR service, so as to transmit the service data of the XR service (hereinafter referred to as XR service data) according to the transmission delay.

S701: The MAC layer of the terminal device initializes the token number Bxr=0 of the token bucket corresponding to the target logical channel, where the target logical channel is the logical channel corresponding to the XR service and is used to transmit service data of the XR service.

In this embodiment of the present application, the number of tokens Bxr in the token bucket corresponding to the target logical channel may also be referred to as the number of tokens Bxr corresponding to the target logical channel.

This example only takes the example of initializing the token data Bxr corresponding to the target logical channel to 0, but it should be noted that this example does not limit the initial value of the number of tokens, and the initial value may also be other values.

S702: When one or more RLC SDUs carrying the Vth XR service data arrive at the MAC layer target logical channel of the terminal device (the Vth XR service data has not been multiplexed), the MAC layer of the terminal device initializes the Vth The remaining transmission time of the XR service data D=the transmission delay of the XR service; and the data volume of the remaining data of the Vth XR service data is initialized Sv=the total data volume of the Vth XR service data.

The Vth XR service data may be any XR service data.

Each XR service data may be one frame of image, set frame image or multiple frame images; or one frame image, set frame image or one image slice of multiple frame images, which is not limited in this application.

Exemplarily, the Vth XR service data may be the Vth frame image or the Vth image slice.

Wherein, the amount of data carried by each RLC SDU that carries the Vth XR service data is determined by the terminal equipment itself, which is not described in detail in this application.

In addition, it should also be noted that this example does not limit the format of data packets carrying XR service data. This example only takes RLC SDU as an example. In other communication systems or application scenarios, data packets carrying service data may also be in other formats. data pack.

In this example, the MAC layer of the terminal device can sequentially multiplex multiple RLC SDUs carrying the Vth XR service data into the target transport channel according to the set order, and the target transport channel is the transport channel corresponding to the target logical channel.

S703: The MAC layer of the terminal device calculates the PBR of the target logical channel according to the data volume Sv of the remaining data of the Vth XR service data and the remaining transmission time D; and updates the order of the token bucket corresponding to the target logical channel according to the PBR Number of cards Bxr.

Since PBR represents the increase rate of tokens in the token bucket, it can represent the transmission speed of XR service data. Therefore, when the data volume Sv and the remaining transmission time D of the remaining data of the Vth XR service data are known, it is possible to Determine the rate of increase of tokens in the token bucket for the remaining time D. Exemplarily, when PBR is represented by the amount of data (such as the number of bits) increased per unit time, PBR=Sv/D; when PBR is represented by the number of tokens increased per unit time, PBR=(Sv/q )/D, where each token is used to transmit a fixed amount of data q. The unit time may be a standard time unit such as seconds (second, s) or milliseconds (millisecond, ms).

The following description only takes the PBR expressed by the number of tokens added in a unit time as an example for illustration.

In S703, the MAC layer of the terminal device may update Bxr according to the PBR, that is, in each token increment time interval T, Bxr is increased by Bxr' (that is, Bxr=Bxr+Bxr'). Among them, Bxr' is the token increment within T time, that is, the product of PBR and T, that is, Bxr'=PBR×T. The token increment time interval T is the update period of Bxr, and its value may be the same as the transmission time interval TTI, or may be different from the TTI, which is not limited in this application.

It should also be noted that when the RRC layer of the base station further configures the token bucket depth BSD (used to indicate the token number threshold of the token bucket) for the target logical channel of the terminal device, the MAC layer of the terminal device is in the In the process of updating Bxr according to PBR, it is necessary to ensure that Bxr is less than or equal to the token quantity threshold indicated by BSD.

S704: At each transmission moment, the MAC layer of the terminal device, according to the number of tokens Bxr in the current token bucket, the data amount K of the remaining data in the RLC SDU to be transmitted in the target logical channel, and the idle data in the MAC PDU of the target transmission channel The amount of resources M (that is, the amount of data M that can be carried by idle resources in the MAC PDU), the target data whose data amount is Z in the remaining data of the Vth XR service data is multiplexed into the MAC PDU, and according to the target data of the target data. The amount of data Z, the number of tokens Bxr to update the token bucket.

The RLC SDUs to be transmitted are: in the process of sequentially transmitting the plurality of RLC SDUs carrying the Vth XR service data by the MAC layer, the RLC SDUs whose data has not been completely transmitted. Certainly, the remaining data in the to-be-transmitted RLC SDU is included in the remaining data of the Vth XR service data.

The amount of idle resources in the MAC PDU = the total amount of data that can be carried in the MAC PDU - the total amount of data that has been multiplexed into all data in the MAC PDU.

In a transmission moment, when it is determined that Bxr is greater than 0, the MAC layer of the terminal device can multiplex data with a data amount of M into the MAC PDU at most. According to the difference in the size relationship between the data amount K of the remaining data in the RLC SDU to be transmitted and the idle resource amount M in the MAC PDU, the value of the data amount Z of the target data multiplexed this time is also different, which can be divided into for the following cases:

Case 1: If the data amount K of the remaining data in the RLC SDU to be transmitted is ≥ the idle resource amount M in the MAC PDU, then the data amount of the target data Z=M, that is, the target data is the amount of data in the RLC SDU to be transmitted data for M. In this case, the MAC layer can determine the number of tokens N=Z/q consumed for scheduling the target data this time, and can update the number of tokens in the token bucket to Bxr=Bxr-N=Bxr-Z/ q.

Situation 2: If the data amount K of the remaining data in the RLC SDU to be transmitted < the idle resource amount M in the MAC PDU, the MAC layer needs to further combine the data amount K and the number of tokens of the remaining data in the RLC SDU to be transmitted. The total data volume L (L=q*Bxr) of the data that the token of Bxr can transmit is compared to:

If K≥L, the MAC layer multiplexes all the RLC SDUs to be transmitted into the MAC PDU, that is, the target data is all the remaining data in the RLC SDUs to be transmitted. In this case, the MAC layer can determine that the target data volume Z=K for multiplexing this time, the number of tokens consumed N=Z/q, and can update the number of tokens in the token bucket to Bxr=Bxr -N=Bxr-Z/q.

If K<L, the MAC layer can determine that the target data volume Z=K to be multiplexed this time, and multiplex all the RLC SDUs to be transmitted into the MAC PDU, and update the number of tokens in the token bucket to Bxr= Bxr-Z/q, and update the amount of idle resources M in the MAC PDU to M=M-K. After that, the MAC layer also needs to continue multiplexing the next RLC SDU in the logical channel as the RLC SDU to be transmitted into the MAC PDU. The multiplexing process is the same as the above steps, that is, the updated RLC SDU to be transmitted needs to be The data amount K of the remaining data is continuously compared with the idle resource amount M in the updated MAC PDU, and according to the comparison result, part or all of the data in the updated RLC SDU to be transmitted is multiplexed into the MAC PDU until it meets any of the following Stop condition:

The RLC SDUs in the target logical channel are all multiplexed into the MAC PDU; the token data amount Bxr of the token bucket is less than or equal to 0; there is no more idle resources in the MAC PDU (that is, the idle resource amount M=0 in the MAC PDU).

Exemplarily, it is assumed that the RLC SDUs carrying the Vth XR service data in the target logical channel are RLC SDU0 and RLC SDU1, and the current RLC SDU to be transmitted is RLC SDU0. Then the data amount K of the remaining data in the RLC SDU0 is less than the idle resource amount M in the MAC PDU, and the total data amount L (L=q*Bxr) of the data that can be transmitted by the token of K<the current number of tokens Bxr, Then the MAC layer first multiplexes all the remaining data in the RLC SDU0 into the MAC SDU, updates the number of tokens in the token bucket to Bxr=Bxr-K/q, and updates the idle resource M in the MAC PDU to M= M-K. Then take the RLC SDU1 as the new RLC SDU to be transmitted (at this time, the data amount of the remaining data in the RLC SDU to be transmitted is K=the data amount of the RLC SDU1), and continue to multiplex the data in the RLC SDU1 into the MAC SDU until it meets the The above stop condition: if Bxr>0 and K<M, the MAC layer multiplexes all RLC SDU1 into MAC PDU (since there is only one RLC SDU left, there is no need to consider the total amount of data that can be transmitted by Bxr, and will make The token data volume of the bucket is updated to Bxr=Bxr–K/q; if Bxr>0, and K≥M, the MAC layer multiplexes the data with the data volume of M in the RLC SDU1 into the MAC PDU (at this time the MAC The PDU is full, and there are no more free resources), and the token data amount of the token bucket is updated to Bxr=Bxr-M/q.

It should be noted that since the MAC layer needs to avoid segmenting the RLC SDU as much as possible during the multiplexing process, the updated Bxr may be less than 0. When the Bxr of the target logical channel is less than or equal to 0, if Bxr is still less than 0 at the next TTI transmission time, that is, after adding PBR*TTI tokens, the MAC layer will no longer perform the Vth XR in the target logical channel. The remaining data in the service data is multiplexed until the Bxr of the target logical channel is greater than 0.

It should also be noted that when multiple logical channels including the target logical channel multiplex the target transport channel, the RRC layer of the base station also needs to configure the priorities of the multiple logical channels. The priority parameter of any logical channel determines the order in which the target transport channel is multiplexed by the logical channel in multiple logical channels, that is, the RLC SDU in the logical channel with the higher priority will be preferentially multiplexed into the MAC PDU.

Continuing to take FIG. 3 as an example, it is assumed that logical channel 2 is the target logical channel corresponding to the XR service, and B2=Bxr. When the MAC layer of the terminal device sequentially multiplexes the data in the three logical channels into the MAC PDU according to the current parameters such as the number of tokens of each logical channel (that is, the MAC layer performs the above S704 for the parameters such as the number of tokens of each logical channel) ), if there are still idle resources in the MAC PDU, the MAC layer of the terminal device can perform an additional multiplexing process, and continue to sequentially multiplex the remaining data in the logical channels into the MAC PDU according to the priorities of the multiple logical channels. . Referring to Figure 8, additional multiplexing processes include:

1. The MAC layer of the terminal device sequentially assigns the RLC SDU1-1 in the logical channel 1, the RLC SDU2-1 in the logical channel 2, and the RLC SDU3 in the logical channel 3 according to the parameters such as the token data amount of each logical channel. -1 is multiplexed into the MAC PDU. That is, the MAC layer performs the above S704 for parameters such as the number of tokens of each logical channel, so that the RLC SDU1-1 in the logical channel 1, the RLC SDU2-1 in the logical channel 2, and the RLC SDU3- 1 is multiplexed into the MAC PDU.

2. After step 1, there are still idle resources in the MAC PDU, and the idle resources are sufficient, then the MAC layer preferentially multiplexes all the remaining data (ie RLC SDU1-2) in the logical channel 1 into the MAC PDU, as shown in Figure 8 shown.

3. After step 2, since there are still idle resources in the MAC PDU (the amount of data that can be carried is X), the MAC layer continues to store the remaining data (RLC SDU2-2 and RLC SDU2-) in logical channel 2 (ie, the target logical channel). 3) The data whose data volume is X is multiplexed into the MAC PDU. For example, when X is greater than the data volume of all data in RLC SDU2-2, and less than the data volume of all data in RLC SDU2-2 and the data volume of all data in RLC SDU2-3, the MAC layer will All the data in the RLC SDU2-2 and part of the data in the RLC SDU2-2 are multiplexed into the MAC PDU.

It should be noted that, after completing one round of multiplexing process for multiple logical channels according to the number of tokens, since there may still be idle resources in the MAC PDU for additional multiplexing process, it will no longer cost (consume) to be multiplexed. The number of tokens for the logical channel. Therefore, regardless of whether the target logical channel has the additional multiplexing process, the number of tokens that need to be consumed for multiplexing the target data this time is N=Z/q.

S705: After each transmission time, the MAC layer of the terminal device updates the data amount Sv of the remaining data of the Vth XR service data, and the remaining transmission time D.

In one embodiment, in S705, after the MAC layer of the terminal device completes a round of multiplexing process for multiple logical channels according to parameters such as the number of tokens of each logical channel, there are no idle resources in the MAC PDU, or the MAC The idle resources existing in the PDU are occupied by the data of other logical channels with a priority higher than the target logical channel, then in S705, the MAC layer only multiplexes the target data whose data volume is Z in the target logical channel into the MAC PDU. In this case, the MAC layer updates the data amount of the remaining data of the Vth XR service data to Sv=Sv-Z.

In another embodiment, in S705, after the MAC layer of the terminal device completes a round of multiplexing process for multiple logical channels according to parameters such as the number of tokens of each logical channel, there are still idle resources in the MAC PDU, and the MAC PDU still has idle resources. The layer continues with additional multiplexing processes. And in this additional multiplexing process, the idle resource is not occupied by data with a priority higher than the target logical channel, and the MAC layer continues to use the remaining data of the Vth XR service data in the target logical channel as Z. The data is multiplexed into the MAC PDU, as shown in Figure 8. In this case, the MAC layer updates the data amount of the remaining data of the Vth XR service data to Sv=Sv-(Z+X).

In addition, the MAC layer updates the remaining transmission time D=D-TTI.

Through this step, the MAC layer can continue to update the PBR of the target logical channel according to the updated Sv and D.

S706: The MAC layer of the terminal device determines whether the remaining transmission time D of the Vth XR service data is less than or equal to 0, and if so, execute S707; otherwise, according to the Sv and D updated in S705, continue to execute S703, so that the th The remaining data in the V XR service data is multiplexed into the MAC PDU in the target transport channel.

This example only takes the determination threshold value of the remaining transmission time D as 0 for illustration, but does not constitute a limitation on the determination threshold value. In practical applications, the determination threshold value may also be other set values.

The XR service requires the same transmission delay for each XR service data. When the remaining transmission time D of a certain XR service data is less than or equal to 0, it means that the transmission time of the XR service data cannot reach the XR service transmission delay. At this time, if the XR service data continues to be transmitted, the transmission delay of the subsequently arrived XR service data may continue to be affected. Therefore, in one implementation of this example, in S706, when the MAC layer of the terminal device determines that the remaining transmission time D of the Vth XR service data is less than or equal to 0, then discard the Vth XR in the target logical channel The remaining data of the service data (that is, discarding all RLC SDUs carrying the remaining data in the Vth XR service data in the target logical channel). In this way, the MAC layer no longer multiplexes the RLC SDUs carrying the remaining data of the Vth XR service data, so that the RLC SDUs carrying the next XR service data can be multiplexed to the target transmission channel.

As shown in FIG. 7 , S707 is the first possible implementation manner provided by this embodiment of the present application.

In the second embodiment, after the MAC layer of the terminal device determines that the remaining transmission time D of the Vth XR service data is less than or equal to 0, the MAC layer of the terminal device may choose to continue multiplexing the Vth XR in the target logical channel. The remaining data in the business data. During this process, since the PBR cannot continue to be updated through the remaining transmission time D, the MAC layer can continue to update Bxr using the PBR calculated last time before. Since the actual transmission duration of the Vth XR service exceeds the transmission delay of the XR service, it may occur that the remaining data of the Vth XR service data has not been transmitted, and at least one RLC SDU carrying the V+1th service data may occur. The condition of reaching the target logical channel. At this time, in order not to affect the transmission delay of the next XR service data (that is, the V+1th XR service data), the MAC layer may initialize the remaining transmission time of the V+1th XR service data by adding the Vth The occupied time of XR service data will be deducted accordingly.

For example, after the MAC layer determines that the remaining transmission time D of the Vth XR service data is less than or equal to 0, it continues to update Bxr using the PBR calculated last time before, and continues to update Bxr at each transmission moment through the implementation method described in S704. The remaining data in the V XR service data is multiplexed into the MAC PDU; in the process of continuing to transmit the remaining data in the V th XR service data, when at least one RLC SDU carrying the V+1 th service data arrives at the target logical channel After that, the MAC layer can time the occupied duration of the Vth XR service data. When the transmission of the Vth XR service data is completed, the MAC layer stops timing the occupied duration, and then the MAC layer transmits the V+1th XR service data through S702-S707. Wherein, in the process of S702, the remaining transmission time D=transmission delay of the XR service-occupancy time length of the new V+1 th XR service data is initialized by the MAC layer. The process of timing the occupied duration in this embodiment will be described in detail in the subsequent S708.

S707: The MAC layer of the terminal device discards the remaining data of the Vth XR service data, that is, discards the RLC SDU that carries the remaining data of the Vth service data in the target logical channel.

S708: After one or more RLC SDUs carrying V+1 pieces of XR service data arrive at the target logical channel, the MAC layer of the terminal device updates V=V+1, and repeats S702-S707, so that through dynamic PBR, the The RLC SDU carrying the new XR service data continues to be multiplexed into the MAC PDU, and the specific process can refer to the above steps, which will not be repeated here.

It should be noted that this step may occur at any time during the process of transmitting the Vth XR service data, or after the transmission of the Vth XR service data ends.

In the first embodiment, when the MAC layer of the terminal device transmits the Vth XR service data, one or more RLC SDUs carrying V+1 XR service data arrive at the target logical channel, then the MAC layer determines when When the Vth XR service data times out (that is, the remaining transmission time D≤0 of the Vth XR service data), the MAC layer can discard the RLC SDU carrying the remaining data of the Vth service data, so as to transmit the V+1th service data as soon as possible XR business data. In this way, the transmission delay of each VR service data in the XR service can be guaranteed.

In the second embodiment, when the MAC layer of the terminal device transmits the Vth XR service data, one or more RLC SDUs carrying V+1 XR service data arrive at the target logical channel, then the MAC layer determines the Vth XR service data. When the V pieces of XR service data time out (that is, the remaining transmission time D≤0 of the Vth XR service data), the MAC layer can continue to update Bxr with the PBR calculated last time before, and use the embodiment method described in S704 to update Bxr in each At the transmission moment, the remaining data in the Vth XR service data is multiplexed into the MAC PDU. In this way, the following two situations can occur:

If the V+1 th XR service data arrives before the V th XR service data times out, the MAC layer starts to count the occupied duration of the V th XR service data at the moment when the V th XR service data times out, and at the time when the V th XR service data times out. When the transmission of the Vth XR service data is completed, the timing of the occupied time period is stopped.

If the V+1 th XR service data arrives after the V th XR service data times out, the MAC layer starts to count the occupied duration of the V th XR service data at the arrival time of the V+1 th service data, and at the When the transmission of the V XR service data is completed, the counting of the occupied duration is stopped.

After the MAC layer transmits the Vth XR service data, it transmits the V+1th XR service data through S702-S707. Wherein, in the process of S702, the remaining transmission time of the new V+1 th XR service data is initialized by the MAC layer D=the transmission delay of the XR service-the occupied time length of the V th XR service data.

It should be noted that, in the second embodiment, since the remaining transmission time of the V+1 th XR service data initialized by the MAC layer is less than the transmission delay of the XR service, the V+1 th XR service data is also very limited. May time out. If the remaining transmission time D of the V+1 XR service data is less than or equal to 0, and there is still remaining data that has not been transmitted, the MAC layer can continue to occupy the transmission time of the V+2 XR service data. The descriptions in the two implementation manners are shown, and are not repeated here.

Based on the embodiment shown in FIG. 6A and the example shown in FIG. 7 , the present application also provides another example of a communication method. In the example, the mobile communication system is continued as an example, and the MAC layer scheduling is performed in the process of implementing the XR service by the terminal device. As an example, the example includes the following steps:

Taking Figure 8 as an example, there are currently three

logical channels

1, 2, and 3 on the MAC layer of the terminal device, and their priorities decrease in sequence, that is, logical channel 1 is assigned the highest priority by the RRC layer of the base station, and logical channel 3 is assigned by the RRC layer of the base station. The layer configures the lowest priority, where XR traffic is transmitted on logical channel 2. In this example, the PBR of logical channel 1 or logical channel 2 can be assigned a static PBR to the RRC layer of the base station, that is, the MAC layer uses the traditional method to multiplex the RLC SDUs in logical channel 1 and logical channel 2. While the logical channel 2 is used as the target logical channel, its PBR adopts the method described in FIG. 6A or FIG. 7 , and uses the dynamic PBR to update the token.

In this example, the XR service data is one frame of image data as an example for description. And it is illustrated that each token is used for multiplexing/transmitting 1 bit of data, that is, q=1 bit/token.

A1: After the base station and the terminal device establish a wireless connection, the base station allocates the service delay of the XR service to the terminal device. The terminal device determines the transmission delay D of the XR service as D=10ms according to the service delay of the XR service. The terminal device initializes the XR logical channel for transmitting the XR service, and initializes the number of tokens in the token bucket corresponding to the XR logical channel, Bxr=0.

In this mobile communication system, the transmission time interval (scheduling period, transmission period) TTI and the token increment time interval T of the terminal equipment are both 1ms, that is, T=TTI=1ms.

A2: When the RLC SDU carrying the image data of the Vth frame arrives at the XR logical channel, the MAC layer of the terminal device initializes the remaining transmission time of the image data of the Vth frame D = the transmission delay of the XR service is 10ms, and initializes the image data of the Vth frame The data amount of the remaining data Sv = the total data amount of the V-th frame image (ie, the total data amount of the V-th frame image data) 1Mbits. The V-th frame image data is divided into 20 RLC SDUs, which are {SDU0,...,SDU19}, and SDU0=SDU1=...=SDU19=50kbits. The MAC layer of the terminal device can determine the PBR of the XR logical channel according to Sv and D. The PBR is a dynamic PBR, and in this example, the PBR is represented by the amount of data increased per unit time. In this example, Pxr,v can be used to represent the dynamic PBR. According to Sv and D, Pxr,v=Sv/D=100Mbps can be obtained.

A3: First TTI:

(1) At this time, the MAC layer of the terminal device updates the number of tokens Bxr in the token bucket corresponding to the XR logical channel according to the PBR, that is, Bxr=Bxr+Bxr'=100kbits, where Bxr'=Pxr, v×T =100kbits.

(2) If the amount of idle resources in the MAC PDU is M=327kbits at the moment of this transmission, since the priority of logical channel 1 is the highest, if the MAC layer multiplexes the data of the data volume B1=155kbits in logical channel 1 to In the MAC PDU, the idle resource amount of the MAC PDU at this time is M=327kbits-155kbits=272kbits.

(3) The MAC layer of the terminal device adopts the implementation described in S704 in the embodiment shown in FIG. 7 to multiplex the Vth frame image data in the logical channel 2 into the MAC PDU. In this scheduling, the free resource M of the MAC PDU is greater than Bxr and greater than the RLC SDU0, so the RLC SDU0 does not need to be segmented. At this time, the data of the RLC SDU0 is multiplexed into the MAC PDU, and the data amount in the Bxr=Bxr-RLC SDU0 is updated to 50kbits. At this time, there is still Bxr>0, and the free resource M of the MAC PDU is greater than the RLC SDU1, so the RLC SDU1 does not need to be segmented. After the MAC layer completes the multiplexing of the RLC SDU1 to the MAC PDU, Bxr=Bxr-RLC SDU1 The amount of data in the RLC SDU1 is 50kbits=0, and the MAC layer no longer multiplexes the data in the logical channel 2.

(4) Referring to Fig. 8, after the multiplexing of

logical channels

1 and 2 is completed, the idle resource M of the MAC PDU at this time is 327kbits-155kbits-100kbits=172kbits. Assuming that there are 50kbits of data in logical channel 3 multiplexed into the MAC PDU, all 3 logical channels are multiplexed at this time, and the MAC PDU still has 122kbits of remaining resources, so it will be multiplexed again according to the logical channel priority order:

If there is 60kbits of remaining data in logical channel 1, all the 60kbits data is multiplexed into the MAC PDU. At this time, the idle resource amount of the MAC PDU is M=62kbits, and these idle resources can be used to multiplex the data in the logical channel 2, that is, the MAC The layer multiplexes the entire data of SDU2 in logical channel 2 and the first 12kbits of data of SDU3 into the MAC PDU. After that, because the MAC PDU has no idle resources, the MAC layer stops multiplexing all logical channels. SDU3 in logical channel 2 still has 38kbits to transmit.

(5) After this scheduling, the MAC layer of the terminal device updates Sv=1Mbits-100kbits-62kbits=838kbits, D=10ms-1ms=9ms.

(6) After this scheduling, the MAC layer of the terminal device updates the dynamic PBR, that is, Pxr,v=Sv/D=838kbits/9ms=94kbps.

A4: Second TTI:

(1) At this time, the MAC layer of the terminal device updates the number of tokens Bxr in the token bucket corresponding to the XR logical channel according to the new PBR, that is, Bxr=Bxr+Bxr'=94kbits, wherein,

to round up. This application does not limit the calculation method of Bxr', for example, Bxr' can also be calculated by rounding down.

(2) The MAC layer of the terminal device determines that the amount of idle resources M in the MAC PDU is 234kbits. It should be noted that the MAC PDU involved in this step and the MAC PDU involved in step A3 are not the same MAC PDU. At this time, the MAC layer multiplexes the data amount of 147kbits in the logical channel 1 into the MAC PDU. At this time, the idle resource amount of the MAC PDU is M=234kbits-147kbits=87kbits.

(3) After the multiplexing of logical channel 1 is completed, the MAC PDU still has idle resources, so the MAC layer can perform multiplexing of logical channel 2. If the MAC layer of the terminal device adopts the implementation described in S704 in the embodiment shown in FIG. 7 , the Vth frame image data in logical channel 2 is multiplexed into the MAC PDU. In this call, the free resource M of the MAC PDU is larger than Bxr and larger than the remaining data amount of the RLC SDU3, which is 38kbits. Therefore, the MAC layer can multiplex the remaining data of the RLC SDU3 in the logical channel 2 into the MAC PDU, and spend the corresponding Number of tokens, at this time Bxr=Bxr-MAC SDU3 remaining data volume=94kbits-38kbits=56kbits, MAC PDU idle resource M=87kbits-38kbits=49kbits. Because Bxr>0 and the MAC PDU still has free resources, the MAC layer can continue to multiplex the RLC SDU4 of logical channel 2 into the MAC PDU. And because RLC SDU4=50kbits>49kbits, only the first 49kbits of SDU4 can be multiplexed into the MAC PDU. At this time, the MAC PDU has no available resources, and the MAC layer no longer multiplexes the data of logical channel 3 into the MACP PDU. After this scheduling, the number of tokens in logical channel 2 is Bxr=56kbits-49kbits=7kbits.

(4) After this scheduling, there are no idle resources in the MAC PDU.

(5) After this scheduling, the MAC layer of the terminal device updates Sv=838kbits-87kbits=751kbits, D=9ms-1ms=8ms.

(6) After this scheduling, the MAC layer of the terminal device continues to update the dynamic PBR, that is, Pxr,v=Sv/D=751kbits/8ms=94kbits.

A5: In each subsequent TTI, the MAC layer of the terminal device can continue to multiplex the data in the logical channel into the MAC PDU of the transport channel by repeating step A3 or A4.

A6: In the first embodiment, if after a certain scheduling, the remaining transmission time D for updating the Vth frame of image data by the MAC layer of the terminal device is less than or equal to 0, the data amount of the remaining data in the Vth frame of image data Sv>0, indicating that the Vth frame of image data is not completely transmitted within the specified transmission delay of the XR service. In order to ensure the transmission delay of subsequent image frames, the MAC layer of the terminal device can discard the remaining data of the V-th frame image whose data volume is Sv, so that when the RLC SDU carrying the V+1-th frame image data reaches the XR logical channel, the MAC layer The layer can schedule the RLC SDU carrying the V+1th frame image data as soon as possible.

In the second embodiment, if after a certain scheduling, the remaining transmission time D of the V-th frame of image data updated by the MAC layer of the terminal device is less than or equal to 0, the data amount of the V-th frame of image data remaining data Sv> 0, the MAC layer of the terminal device can choose to continue to multiplex the remaining data in the image data of the Vth frame, that is, continue to repeat steps A3 or A4; wherein in A3 and A4, the MAC layer does not update the PBR corresponding to the logical channel. And update Bxr with the last calculated PBR before.

A7: In the first embodiment, when the RLC SDU carrying the V+1th frame of image data arrives at the XR logical channel, if the Vth frame of image data has not been transmitted, the MAC layer of the terminal device can start the Vth frame of image data. When the remaining transmission time D of the data is less than or equal to 0, the remaining data of the Vth frame of image data is discarded, that is, the first embodiment in A6; and the MAC layer continues to repeat the above for the RLC SDU carrying the Vth+1st frame of image data. Steps A2-A6, in order to try to multiplex all the image data of the V+1th frame into the MAC PDU within the specified transmission delay of the XR service.

In the second embodiment, when the RLC SDU carrying the V+1 frame of image data arrives at the XR logical channel, if the V-th frame of image data has not been transmitted, the MAC layer of the terminal device can continue to repeat steps A3 or A4 to The remaining data in the image data of the Vth frame is multiplexed. If after a certain scheduling, the MAC layer of the terminal device determines that the image data of the Vth frame has timed out, there is still remaining data in the image data of the Vth frame that has not been transmitted, and the MAC layer of the terminal device can choose to continue to process the remaining data in the image data of the Vth frame. Perform multiplexing, that is, continue to repeat step A3 or A4; wherein in A3 and A4, the MAC layer can update Bxr using the PBR calculated last time before. If the V+1 th frame of image data arrives before the V th frame of image data times out, the MAC layer starts to count the occupied duration of the V th frame of image data at the moment when the V th frame of image data times out. If the V+1th frame of image data arrives after the Vth frame of image data times out, the MAC layer starts timing the occupied duration of the Vth frame of image data at the time when the V+1th frame of image data arrives. After the transmission of the Vth frame of image data is completed, the MAC layer stops the arrival duration of the V+1th frame of image data to count, and performs the above steps A2-A6 for the RLC SDU carrying the V+1st frame of image data. Wherein, in step A2, the MAC layer initializes the remaining transmission time of the V+1th frame of image data D=10ms-the occupied time duration of the Vth frame of image data.

It should be noted that this example takes the XR service as an example for description, however, this example does not constitute a limitation on the service to which the method provided by the present application is applied. In addition, there are multiple logical channels in the terminal device, and the MAC layer of the terminal device may perform the above communication method on some or all of the multiple logical channels. In addition, when multiple logical channels multiplex the same transmission channel, the MAC layer of the terminal device may perform the above communication method on some or all of these logical channels, which is not limited in this application.

In addition, in the above example, the TTI is 1 ms as an example, but in fact, the value of the TTI may be other durations, such as 1.5 ms, 2 ms, and so on. And in the process of MAC layer scheduling, the duration of TTI can also change. For example, TTI=1ms between the first transmission time and the adjacent second transmission time, and TTI=1.5ms between the second transmission time and the adjacent third transmission time.

Finally, it should also be noted that the communication method provided by the embodiment of the present application is applicable to the initial transmission of service data, and the retransmission of some service data may not be applicable due to different retransmission mechanisms of service data.

In addition, in some scenarios, such as in a 5G communication system, a logical channel may be associated with a transmission moment, and at this transmission moment, other logical channels may not allow multiplexing of the transmission channel corresponding to the logical channel. For example, in the case where multiple logical channels of a communication device can multiplex the same transmission channel, and the first transmission moment is associated with the first logical channel, then at the first transmission moment, the MAC layer of the communication device can only associate the first logical channel The service data in the logical channel is multiplexed to the transport channel, and the service data in other logical channels is not multiplexed to the transport channel. Although the embodiments and examples provided by the embodiments of the present application do not consider the association relationship between the logical channel and the transmission moment, this does not constitute a limitation of the communication methods provided by the embodiments of the present application.

Based on the same technical concept, an embodiment of the present application also provides a communication device, which can be applied to the communication system as shown in FIG. 4 . Optionally, the communication device may be a terminal device or a network device in a mobile communication system, or may be a terminal device in a sidelink communication system, which is not limited in this application. The communication device can implement the methods provided by the above embodiments or examples. Referring to FIG. 9 , the communication device 900 includes: a transceiver 901 , a processor 902 , and a memory 903 . The transceiver 901 , the processor 902 and the memory 903 are connected to each other.

Optionally, the transceiver 901 , the processor 902 and the memory 903 are connected to each other through a bus 904 . The bus 904 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of presentation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.

The transceiver 901 is used for receiving and sending signals to realize communication with other devices. The transceiver 901 can be connected to an antenna for signal transmission.

The processor 902 is configured to implement the communication methods provided by the above embodiments or examples. For specific functions, reference may be made to the descriptions in the above embodiments, which will not be repeated here.

Wherein, the processor 902 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP), or a combination of CPU and NP, and so on. The processor 902 may further include hardware chips. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general-purpose array logic (generic array logic, GAL) or any combination thereof. When the processor 902 implements the above functions, it can be implemented by hardware, and of course, it can also be implemented by executing corresponding software by hardware.

The memory 903 is used to store program instructions and the like. Specifically, the program instructions may include program code, and the program code includes computer operation instructions. The memory 903 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage. The processor 902 executes the program instructions stored in the memory 903 to implement the above functions, thereby implementing the methods provided by the above embodiments.

Based on the above embodiments, the embodiments of the present application further provide a computer program, when the computer program runs on a computer, the computer can execute the methods provided by the above embodiments.

Based on the above embodiments, the embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a computer, the computer executes the method provided by the above embodiment. .

The storage medium may be any available medium that the computer can access. By way of example and not limitation, computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or be capable of carrying or storing instructions or data structures in the form of desired program code and any other medium that can be accessed by a computer.

Based on the above embodiments, an embodiment of the present application further provides a chip, where the chip is used to read a computer program stored in a memory to implement the methods provided by the above embodiments.

Based on the above embodiments, the embodiments of the present application provide a chip system, where the chip system includes a processor for supporting a computer apparatus to implement the functions involved in the communication device in the above embodiments. In a possible design, the chip system further includes a memory for storing necessary programs and data of the computer device. The chip system may be composed of chips, or may include chips and other discrete devices.

To sum up, the embodiments of the present application provide a communication method and device. In this method, the communication device can dynamically determine the PBR corresponding to the target service according to the remaining data volume and remaining transmission time of the service data of the target service, so as to transmit the service data according to the PBR; wherein, the remaining transmission time is based on the target service. The difference between the target transmission duration determined by the transmission delay of the service and the duration elapsed for transmitting the service data. Since the PBR of the target service changes dynamically according to the requirement of the transmission rate of service data, this method can improve the probability of all transmission of service data within the specified transmission delay of the target service as much as possible. In a word, the method can ensure the transmission delay of the service data of the communication device and improve the user experience of the service.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these 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 also intended to include these modifications and variations.

Claims

A communication method, applied to terminal equipment, is characterized in that, comprising:

determining the remaining data volume of the first service data of the target service and the first remaining transmission time of the first service data;

Determine the first priority bit rate PBR corresponding to the target service according to the remaining data amount and the first remaining transmission time; wherein, the first remaining transmission time is the first target transmission time and the transmission The difference between the elapsed durations of the first service data; the first target transmission duration is determined according to the transmission delay of the target service.
The method of claim 1, wherein the method further comprises:

Receive indication information from a network device, where the indication information is used to indicate the transmission delay of the target service.
The method according to claim 1 or 2, wherein after determining the first PBR corresponding to the target service, the method further comprises:

According to the first PBR, the value of the first variable is increased, and the first variable corresponds to the target logical channel; wherein, the target logical channel is the logical channel corresponding to the target service;

According to the value of the first variable, the remaining data of the first service data is multiplexed to a target transmission channel; wherein the target transmission channel is a transmission channel corresponding to the target logical channel.
The method according to claim 3, wherein after multiplexing the remaining data of the first service data to the target transmission channel, the method further comprises:

determining the total size of the first service data multiplexed to the target transmission channel;

The value of the first variable is decreased according to the total size of the first service data multiplexed to the target transmission channel.
The method according to claim 4, wherein, according to the value of the first variable, multiplexing the remaining data of the first service data to the target transmission channel, comprising:

According to the value of the first variable, multiplexing part of the data in the remaining data of the first service data to the target transmission channel;

After multiplexing the remaining data of the first service data to the target transmission channel, the method further includes:

reducing the remaining data amount of the first service data according to the total size of the partial data; and reducing the first remaining transmission according to the time consumed for multiplexing the partial data to the target transmission channel this time time;

When the first remaining transmission time is greater than 0, the second PBR corresponding to the target service is determined according to the updated remaining data amount of the first service data and the first remaining transmission time.
The method of claim 5, wherein when the first remaining transmission time is less than or equal to 0, the method further comprises: discarding the remaining data of the first service data.
The method of claim 5, wherein when the first remaining transmission time is less than or equal to 0, the method further comprises:

According to the first PBR, the value of the first variable is increased.
The method of claim 7, wherein the method further comprises:

Before the first remaining transmission time is less than or equal to 0, it is determined that the second service data of the target service arrives at the target logical channel; when the first remaining transmission time is less than or equal to 0, the occupied time is started to be processed timing; or

After the first remaining transmission time is less than or equal to 0, and before all the first service data is multiplexed into the target transmission channel, determine that the second service data of the target service arrives at the target logical channel; When the second service data arrives, start timing the occupied duration;

When all the first service data is multiplexed to the target transmission channel, stop timing the occupied duration;

Initializing the remaining data volume of the second service data as the total data volume of the second service data, and initializing the second remaining transmission time of the second service data as the second target transmission duration; wherein the second The target transmission duration is the difference between the transmission delay of the target service and the occupied duration;

A third PBR corresponding to the target service is determined according to the remaining data amount of the second service data and the second remaining transmission time.
A communication method, applied to network equipment, is characterized in that, comprising:

Determine the transmission delay of the target service;

Send indication information to the terminal device, where the indication information is used to indicate the transmission delay of the target service.
A terminal device, characterized in that it includes:

transceivers for receiving and transmitting signals;

memory for storing program instructions and data;

The processor is configured to read program instructions and data in the memory, and implement the method according to any one of claims 1-8 through the transceiver.
A network device, characterized in that it includes:

transceivers for receiving and transmitting signals;

memory for storing program instructions and data;

A processor, configured to read program instructions and data in the memory, implements the method according to claim 9 through the transceiver.
A communication system, comprising:

The terminal device as claimed in claim 10 , and the network device as claimed in claim 11 .
A computer-readable storage medium, characterized in that, a computer program is stored in the computer-readable storage medium, and when the computer program runs on a computer, the computer is made to execute the method described in any one of claims 1-9. method.
A chip, characterized in that the chip is coupled with a memory, and the chip reads a computer program stored in the memory to execute the method of any one of claims 1-9.