WO2022141560A1

WO2022141560A1 - Method for transporting data stream and communication device

Info

Publication number: WO2022141560A1
Application number: PCT/CN2020/142483
Authority: WO
Inventors: 杨伟强; 吴可镝; 魏岳军; 李拟珺
Original assignee: 华为技术有限公司
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-07

Abstract

The present application provides a method for transporting a data stream and a related device in the field of communications. In the technical solution provided in the present application, transport blocks bearing data streams of different types quality of service respectively perform transport using respective corresponding modulation and coding schemes, so that during the transport of a service comprising data streams of multiple types of quality of service, modulation and coding schemes respectively suitable for data streams of low quality of service and data streams of high quality of service can be selected, so as to satisfy the transport rate of the data streams of low quality of service while satisfying the low-latency and high-reliability requirements of the data streams of high quality of service, thus finally improving the utilization rate of transport resources.

Description

Method and communication device for transmitting data stream

technical field

The present application relates to the field of communication technology, and in particular, to a method and a communication device for transmitting data streams.

Background technique

In a communication system, such as a communication system such as long term evolution (LTE) or new radio (NR), an important criterion for measuring its performance is throughput. Factors that determine the throughput of a communication system include: time-frequency resources, channel quality, and modulation and coding scheme (MCS), etc.

As we all know, with the development of communication technology, time-frequency resources are very limited. Therefore, for a communication system with high data rate requirements and high service quality, such as a communication system providing highly reliable and low-latency services, it is particularly important to effectively utilize time-frequency resources. Choosing an appropriate modulation and coding method is the most direct way to improve the utilization rate of time-frequency resources.

Adaptive Modulation and Coding (AMC) technology is a technology that adaptively selects an appropriate modulation and coding method. The realization principle of the AMC technology can be simply described as: adaptively adjust the modulation and coding mode according to the factors that will affect the system throughput, such as channel quality and transmission performance.

Generally speaking, in the ideal state where the estimated channel quality is very accurate, the MCS adjustment can be done well based only on the channel state information. However, in actual transmission, there is no way to obtain very accurate channel state information. The actual estimated channel state information has a time delay. In the case of rapid changes in the channel state, the estimated channel state information cannot guarantee that the selected MCS is the most suitable.

Therefore, the AMC technology also proposes a method of adjusting the MCS based on the block error ratio (BLER), which can directly reflect the transmission performance. In one method of adjusting MCS based on BLER, MCS can be adjusted based on channel state information and BLER; in another method of adjusting MCS based on BLER, MCS is adjusted only based on BLER.

Except for the method of adjusting the MCS only based on the channel state information, it is necessary to adjust the MCS according to the comparison result between the target BLER threshold value and the actual BLER in the statistical period.

For example, when the actual BLER in the statistical period is less than or equal to the minimum BLER threshold, the MCS order can be increased to obtain a higher transmission rate; when the actual BLER in the statistical period is greater than or equal to the maximum BLER threshold, the MCS order can be reduced. Small MCS order to reduce the actual BLER, but this also reduces the transfer rate.

In a communication system, as long as the data stream at the sender contains data streams that require low latency and high reliability, such as cloud virtual reality (Cloud-VR) data streams in real-time multimedia services or cloud augmented reality ( cloud augmented reality, Cloud-AR) data stream, in order to ensure the low latency requirement of the data stream with low latency and high reliability service requirements, the sender will configure a lower minimum BLER threshold, and select the corresponding BLER based on the BLER MCS for lower transfer rates.

When the minimum BLER threshold is relatively low, it is difficult to count the actual BLER that is less than or equal to the minimum BLER threshold. BLER. This will result in the failure to increase the MCS order in time, so that the transmission strategy cannot be adjusted in time to obtain a larger air interface rate, which in turn results in the inability to improve the transmission efficiency of other data streams, and ultimately leads to a loss of transmission rate.

SUMMARY OF THE INVENTION

The present application provides a method and a communication device for transmitting data streams. On the basis of ensuring the transmission requirements of data streams with high QoS, the transmission efficiency of other data streams can be improved in time, so as to avoid the situation where the reduced MCS under the current AMC mechanism cannot be raised in time. problem, which can ultimately improve the utilization of transmission resources.

In a first aspect, the present application provides a method for transmitting a data stream. The method is applied to a communication device, and the communication device sends multiple data streams of the same service in a first period, the multiple data streams include a first data stream and a second data stream, and the first data stream is The quality of service is higher than the quality of service of the second data stream.

The method includes: sending the first type of transport block using a first modulation and coding scheme corresponding to the first type of transport block in the first period; using the first type of transport block corresponding to the second type of transport block in the first period The second type of transport block is sent in two modulation and coding modes; wherein, the data stream carried by one of the first type of transport block and the second type of transport block includes the first data stream, and the other A data stream carried by a type of transport block includes the second data stream and does not include the first data stream.

The communication apparatus in this application may be a terminal device or an access network device, or may be a chip applied in a terminal device or a chip applied in an access network device.

With reference to the first aspect, in a first possible implementation manner, the first modulation and coding manner and the second modulation and coding manner are different modulation and coding manners.

With reference to the first aspect or the first possible implementation manner, in a second possible implementation manner, the first modulation and coding manner is based on a first duration of the first type of transport block before the first time period The second modulation and coding scheme is determined based on the second block error rate of the second type of transport block within a second time period before the first period.

Optionally, the first modulation and coding manner may also be determined based on the channel quality of the channel used for transmitting the first type of transport block before the first period of time. Similarly, the second modulation and coding manner may also be determined based on the channel quality of the channel through which the user transmits the second type of transport block before the first time period.

With reference to the second possible implementation manner, in the third possible implementation manner, the following relationship is satisfied between the first modulation and coding manner and the first block error rate:

MCS _B = η (MCS _{AMC, B} ),

Wherein, MCS _B represents the first modulation and coding scheme, MCS _AMC,B represents the current reference value of the modulation and coding scheme of the first-type transport block, and n indicates the mapping between the reference value of the modulation and coding scheme and the modulation and coding scheme relation,

Wherein, TargetBLER _B represents the block error rate threshold of the first type of transport block,

represents the historical reference value of the modulation and coding scheme of the first type of transport block, BLER _{TB, B} represents the first block error rate,

represents the channel quality of the channel used to transmit the service between the communication device and the receiving end of the service, f _AMC represents TargetBLER _B ,

BLER _TB,B ,

Mapping relationship with MCS _AMC,B .

Optionally, the above-mentioned mapping manner f _AMC is only an example of obtaining the reference value of the first modulation and coding manner based on the first block error rate mapping. In some other implementation manners of this application, the mapping relationship f _AMC may be through TargetBLER _B ,

BLER _TB,B ,

The mapping to MCS _AMC,B _is obtained with some parameters in MCS AMC,B.

In combination with the third possible implementation manner, in the fourth possible implementation manner, the following relationship is satisfied between the second modulation and coding manner and the second block error rate:

MCS _A = η( _MCS _{AMC, B} -ΔMCS ),

Wherein, MCS _A represents the second modulation and coding scheme, and _ΔMCS represents the difference between the current reference value of the modulation and coding scheme of the first type of transport block and the current reference value of the modulation and coding scheme of the second type of transport block. Offset,

Among them, BLER _TB,A represents the second block error rate, g _AMC represents

BLER _TB,A , MCS _AMC,B , BLER _TB,B ,

and the mapping relationship between _ΔMCS ,

Indicates the offset between the historical reference value of the modulation and coding scheme of the transport block of the first type and the historical reference value of the modulation and coding scheme of the transport block of the second type.

Optionally, the above-mentioned mapping manner g _AMC is only an example of obtaining the offset based on the second block error rate mapping. In some other implementation manners of the present application, the mapping relationship g _AMC may be obtained through

BLER _TB,A , MCS _AMC,B , BLER _TB,B ,

Some parameters in get the mapping to _ΔMCS . .

In combination with the third possible implementation manner, in the fifth possible implementation manner, the following relationship is satisfied between the second modulation and coding manner and the second block error rate:

MCS _A = η (MCS _{AMC, A} ),

Wherein, MCS _AMC,A represents the current reference value of the modulation and coding scheme of the second type of transport block, MCS _A represents the second modulation and coding scheme,

Wherein, TargetBLER _A represents the block error rate threshold of the second type of transport block,

represents the historical reference value of the modulation and coding scheme of the second type of transport block, BLER _TB,A represents the second block error rate, f' _AMC represents TargetBLER _A ,

BLER _TB,A ,

Mapping relationship with MCS _AMC,A .

Optionally, the above-mentioned mapping manner f' _AMC is only an example of obtaining the reference value of the second modulation and coding manner based on the second block error rate mapping. In some other implementation manners of the present application, the mapping relationship f′ _AMC may be obtained through TargetBLER _A ,

BLER _TB,A and

Some parameters in get the mapping to MCS _AMC,A .

With reference to the first aspect or any one of the above possible implementation manners, in a sixth possible implementation manner, the multiple data streams further include a third data stream, and the quality of service of the third data stream is lower than that of the Quality of service for the second data stream. Correspondingly, the method further includes: sending the third-type transport block using a third modulation and coding manner corresponding to the third-type transport block in the first period, and the data stream carried by the third-type transport block is only The third data stream is included.

In this implementation manner, the third modulation and coding manner may be different from at least one of the first modulation and coding manner and the second modulation and coding manner. In addition, the determination manner of the third modulation and coding scheme may refer to the determination manner of the second modulation and coding scheme.

In a second aspect, the present application provides a communication device. The communication device sends multiple data streams of the same service in the first time period, the multiple data streams include a first data stream and a second data stream, and the quality of service of the first data stream is higher than that of the second data stream The quality of service of the data stream. The communication apparatus includes various functional modules for implementing the method in the first aspect or any of the possible implementation manners, and each functional module may be implemented in software and/or hardware respectively.

For example, the communication apparatus includes: a sending module, configured to send the first type of transport block using a first modulation and coding manner corresponding to the first type of transport block in the first period; the sending module is further configured to In the first period, the second type of transport block is sent using the second modulation and coding manner corresponding to the second type of transport block; wherein, one type of the first type of transport block and the second type of transport block is of a type. The data stream carried by the transport block includes the first data stream, and the data stream carried by another type of transport block includes the second data stream and does not include the first data stream.

With reference to the second aspect, in a first possible implementation manner, the first modulation and coding manner and the second modulation and coding manner are different modulation and coding manners.

With reference to the second aspect or the first possible implementation manner, in the second possible implementation manner, the first modulation and coding manner is based on a first duration of the first type of transport block before the first time period The second modulation and coding scheme is determined based on the second block error rate of the second type of transport block within a second time period before the first period.

MCS _B = η (MCS _{AMC, B} ),

BLER _TB,B ,

Mapping relationship with MCS _AMC,B .

MCS _A = η( _MCS _{AMC, B} -ΔMCS ),

Wherein, MCS _A represents the second modulation and coding scheme, and Δ _MCS represents the difference between the current reference value of the modulation and coding scheme of the first type of transport block and the current reference value of the modulation and coding scheme of the second type of transport block. Offset,

BLER _TB,A , MCS _AMC,B , BLER _TB,B ,

and the mapping relationship between _ΔMCS ,

MCS _A = η (MCS _{AMC, A} ),

BLER _TB,A ,

Mapping relationship with MCS _AMC,A .

With reference to the second aspect or any one of the above possible implementation manners, in a sixth possible implementation manner, the multiple data streams further include a third data stream, and the quality of service of the third data stream is lower than that of the Quality of service for the second data stream. Correspondingly, the sending module is further configured to: use the third modulation and coding manner corresponding to the third transport block to send the third transport block in the first period, and the data stream carried by the third transport block only includes the third data stream.

In a third aspect, the present application provides a communication apparatus that may include a processor coupled to a memory. Wherein, the memory is used for storing program codes, and the processor is used for executing the program codes in the memory, so as to implement the method in the first aspect or any one of the implementation manners.

Optionally, the communication device may further include the memory.

When the communication apparatus is a communication device (eg, a terminal or a base station), in some implementations, the communication apparatus may further include a transceiver for communicating with other devices (eg, a base station or a terminal).

When the communication device is a chip used in a communication device, in some implementations, the communication device may further include a communication interface for communicating with other devices in the communication device, for example, for communicating with a transceiver of the communication device.

In a fourth aspect, the present application provides a computer-readable storage medium, where the computer-readable medium stores a program code for execution by a communication device, the program code including a program code for implementing the first aspect or any one of the implementation manners. method instruction.

In a fifth aspect, the present application provides a computer program product comprising instructions, which, when the computer program product is run on a communication device, causes the communication device to implement the method of the first aspect or any one of the implementation manners.

In a sixth aspect, the present application provides a communication system, where the communication system includes the communication apparatus described in the second aspect or any one of the implementation manners.

The technical solution proposed in this application is compared with the traditional method in which all QoS data streams correspond to one modulation and coding method, so that the modulation and coding methods of all transport blocks can only be determined by high QoS data streams. The transport block of the data stream and the transport block carrying other low-quality-of-service data streams use their respective modulation and coding methods, so that when transmitting services containing multiple The modulation and coding method of the high-quality-of-service data stream enables the transmission rate of the low-quality-of-service data stream to be satisfied, and the low-latency and high-reliability requirements of the high-quality-of-service data stream can also be satisfied.

Description of drawings

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

FIG. 2 is a schematic diagram of a transmission block of a data stream according to an embodiment of the present application;

3 is a schematic flowchart of a method for transmitting a data stream according to an embodiment of the present application;

4 is a schematic diagram of a transmission block of a data stream according to another embodiment of the present application;

5 is a schematic flowchart of a method for transmitting a data stream according to another embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application.

Detailed ways

FIG. 1 is a schematic structural diagram of a mobile communication system to which the methods and devices described in various embodiments of the present application are applied. As shown in FIG. 1 , the mobile communication system includes a core network device 110 , a radio access network device 120 and at least one terminal device (such as the terminal device 130 and the terminal device 140 in FIG. 1 ).

One example of the mobile communication system shown in FIG. 1 is a long term evolution (Long Term Evolution, LTE) system, and another example is a new radio (new radio) system.

The terminal equipment is connected to the wireless access network equipment in a wireless manner, and the wireless access network equipment is connected with the core network equipment in a wireless or wired manner. The core network device and the radio access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or they can be one physical device. It integrates the functions of some core network equipment and some functions of the wireless access network equipment. Terminal equipment can be fixed or movable.

It can be understood that FIG. 1 is only a schematic diagram of a mobile communication system to which the methods and apparatuses of the embodiments of the present application are applied. The embodiments of the present application do not limit the number of core network devices, wireless access network devices, and terminal devices included in the mobile communication system. The mobile communication system to which the method and apparatus of the embodiments of the present application are applied may further include other network devices, for example, a wireless relay device and a wireless backhaul device (not shown in FIG. 1 ).

The radio access network equipment can be a base station (base station), an evolved NodeB (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), and the next generation in the fifth generation ( ^5th generation, 5G) mobile communication system. A generation base station (next generation NodeB, gNB), a base station in a future mobile communication system or an access node in a WiFi system, etc.; it can also be a module or unit that completes some functions of a base station, for example, it can be a centralized unit (central unit, CU), or a distributed unit (distributed unit, DU). The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device. In this application, wireless access network equipment is referred to as network equipment, and unless otherwise specified, network equipment refers to wireless access network equipment.

A terminal device may also be referred to as a terminal, UE, mobile station, mobile terminal, or the like. The terminal equipment can be mobile phone, tablet computer, computer with wireless transceiver function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal in industrial control, wireless terminal in unmanned driving, wireless terminal in remote surgery, smart grid wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.

Network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water; can also be deployed in the air on aircraft, balloons and satellites. The embodiments of the present application do not limit the application scenarios of the network device and the terminal device.

The network device and the terminal device can communicate through the licensed spectrum, the unlicensed spectrum, or the licensed spectrum and the unlicensed spectrum at the same time. The network device and the terminal device can communicate through the frequency spectrum below 6 GHz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz for communication at the same time. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

In the embodiment of the present application, the function of the network device may also be performed by a module (eg, a chip) in the network device, or may be performed by a control subsystem including the function of the network device. The control subsystem including network device functions here can be a control center in industrial IoT application scenarios such as smart grid, factory automation, and intelligent transportation. The functions of the terminal device may also be performed by a module (eg, a chip) in the terminal device.

In the wireless communication system shown in FIG. 1, various types of data streams can be transmitted between the wireless access network device and the terminal device. For example, voice, video, data, and network element signaling can be transmitted between wireless access network equipment and terminal equipment.

The multiple types of data streams transmitted between the wireless access network equipment and the terminal equipment may belong to the same service, or may belong to different services. Generally speaking, these various data streams can correspond to various qualities of service (quality of service, QoS).

For example, when a real-time multimedia service is transmitted between a wireless access network device and a terminal device, for the real-time multimedia service, the wireless access network device or terminal device as the sending end needs to transmit control data, audio data and video at the same time. Different types of data flows such as data, these different types of data flows have different QoS requirements. An example of implementing multimedia services is Cloud-VR/AR services.

For another example, for scalable high-efficiency video coding (SHVC) data using layered coding technology, data streams of different coding layers have different QoS requirements.

Data flows with different QoS requirements have different tolerances for error rates. Taking the SHVC encoder to encode video data into two-layer video data streams of the base layer and the enhancement layer as an example, the data of the enhancement layer can tolerate more errors than the data of the base layer, even if the data of the enhancement layer is lost, The basic tier can still provide a stutter-free video experience.

In the traditional AMC technology, the service sender in the wireless access network equipment and the terminal equipment will configure a lower BLER threshold in order to meet the delay and/or reliability requirements of the data flow with the best QoS requirements among various data flows. , and choose a lower MCS order and a longer statistical period. However, once the MCS order is reduced, it is difficult to adjust the air interface rate in time based on real-time channel conditions, which eventually leads to the loss of the air interface rate.

For example, as shown in Figure 2, layer 2 (layer 2) at the service sender determines that data stream A and data stream B need to be sent, and the QoS of data stream A is higher than the QoS of data stream B, for example, the initial transmission BLER of data stream A Less than 1e-3, the initial transmission BLER of data stream B is less than 0.1; the medium access control (MAC) layer and physical layer of the service sender will package data stream A and data stream B, and package the obtained transport block. (transport block, TB) for coding.

In FIG. 2 , the data streams carried by the physical layer TBs sorted from left to right are as follows: the physical layer TBs that carry data streams A and B, the physical layer TBs that only carry data stream B, and the physical layer TBs that only carry data stream A. Layer TB, which only carries the physical layer TB of data stream B.

In order to ensure the QoS of data stream A, in the traditional transmission method, the sender will configure a lower initial transmission BLER, for example, configure the initial transmission BLER to a value less than 1e-3, and select a lower MCS order to modulate and encode all transmission block. This will result in that when the transport block carrying only data stream B is transmitted, because it is difficult to adjust the air interface rate in time, the MCS determined by the QoS of data stream A can still only be used to modulate and encode the transport block only carrying data stream B, thereby reducing the The air interface rate of data flow B, which eventually leads to the loss of the air interface rate.

In view of the above problems, the present application provides a method for transmitting a data stream. In the method proposed in the present application, the transport blocks are classified according to the QoS of the data stream carried, and different types of transport blocks are transmitted using their corresponding modulation and coding modes. In this way, when only a low-QoS data stream is transmitted, the modulation and coding mode of the data stream is no longer limited by the modulation and coding mode of the high-QoS data stream, so that the air interface rate of the service sender can be reasonably utilized, and finally the air interface rate of the sender can be increased.

FIG. 3 is an exemplary flowchart of a method for transmitting a data stream proposed by the present application. As shown in FIG. 3 , the method may include step 301 and step 302 .

The execution subject of the method shown in FIG. 3 is called a communication device, and the communication device is the sending end of the service or a chip applied to the sending end. The sending end in this embodiment may be a wireless access network device or a terminal device.

The sender needs to send multiple data streams in the same time period, and the multiple data streams may be data streams of the same service or multiple data streams of multiple services. The various data flows include data flows with high QoS and data flows with low QoS.

For the convenience of description, in this embodiment, the same period of time is referred to as the first period of time, one of the multiple data streams is referred to as the first data stream, and the other data stream is referred to as the second data stream. The QoS of the first data flow is higher than the QoS of the second data flow.

In this embodiment, the transport blocks are also divided into different types according to the types of data streams carried by the transport blocks. Among them, the transport block (transport block, TB) carrying the first data stream is divided into the same type of transport blocks, and the transport blocks that do not carry the first data stream and carry the second data stream are divided into the same type of transport blocks transport block.

It can be understood that, in this embodiment, a transport block that carries a certain data stream refers to a transport block that includes this type of data stream in the carried data stream. In other words, as long as the transport block carries data streams of this type, regardless of whether the transport block also carries other types of data streams, the transport block can be divided into transport blocks of the corresponding type.

For example, as long as the transport block carries the first data stream, regardless of whether the transport block also carries the second data stream, the transport block can be divided into the aforementioned first type of transport block.

301. Send a first-type transport block in a first time period by using a first modulation and coding manner corresponding to the first-type transport block.

In this embodiment, an example of the duration of the first period is the same length as the statistical period of the block error rate of the first type of transport block.

The first type of transport block may be any one of the two aforementioned transport blocks. The modulation and coding scheme corresponding to the transport block of the first type is referred to as the first modulation and coding scheme.

Taking H.265 Scalable Coding Extended SHVC video data transmission as an example, the first type of transport block may be a transport block that only carries the base layer data in the SHVC video coding data, or may not carry the base layer data but carry the SHVC The transport block of the enhancement layer data in the encoded video data, or may be a transport block that carries both the base layer data and the enhancement layer data in the SHVC video encoded data.

302. Send the second type of transport block by using the second modulation and coding manner corresponding to the second type of transport block in the first time period.

The second type of transport block is another transport block of a different type from the first type of transport block among the aforementioned two types of transport blocks.

As an example, the first type of transport block is a transport block that only carries the base layer data in the SHVC video encoded data, or is a transport block that carries both the base layer data and the enhancement layer data in the SHVC video encoded data. Type 2 transport blocks may be transport blocks that do not carry base layer data but carry enhancement layer data.

As another example, when the first type of transport block is a transport block that does not carry base layer data in SHVC video coded data but carries enhancement layer data, the second type of transport block is a transport block that carries both base layer data in SHVC video coded data and A transport block that carries enhancement layer data, or a transport block that only carries base layer data.

In the method of this embodiment, because different types of transport blocks have corresponding modulation and coding modes respectively, and use the corresponding modulation and coding modes to perform modulation and coding, the transmission requirements of data streams with high QoS requirements can be met while meeting the transmission requirements of data streams with high QoS requirements. , and can also meet the air interface rate of the data flow with low QoS requirements, so that the utilization rate of air interface resources can be improved.

In some implementations of this embodiment, the first modulation and coding manner and the second modulation and coding manner may be different. That is to say. The modulation and coding scheme of the transport block of the first type and the modulation and coding scheme of the transport block of the second type may be different.

In some implementation manners of this embodiment, the first modulation and coding manner corresponding to the first type of transport block within the first period may be based on the block error rate and/or transmission rate of the first type of transport block within a specified period of time before the first period The channel quality of the channel used to transmit the service between the terminal and the receiving terminal is determined. The block error rate of the first type of transport block within a specified time period before the first period is called the first block error rate. As an example, the specified duration is equal to the statistical period of the block error rate of the first type of transport blocks.

The modulation and coding scheme corresponding to the transport block of the second type is called the second modulation and coding scheme. The second modulation and coding scheme corresponding to the second type of transport block in the first period may be based on the block error rate of the second type of transport block within a specified period of time before the first period and/or the transmission between the transmitting end and the receiving end. The channel quality of the channel of the service is determined. The block error rate of the second type of transport block within the specified time period before the first period is called the second block error rate. As an example, the specified duration is equal to the statistical period of the block error rate of the second type of transport blocks.

Taking the first type of transport block as the aforementioned second type of transport block and the second type of transport block as the aforementioned first type of transport block as an example, the following describes how to determine the modulation and coding method of the transport block based on the block error rate and channel quality in this embodiment. an implementation. That is, the second type of transport block is the TB that carries the data stream A, and the first type of transport block is the TB that does not carry the data stream A but carries the data stream B.

In this implementation, the initial transmission BLER of data stream B is selected as the target initial transmission BLER of the AMC (that is, the block error rate threshold of the first type transport block), and the target initial transmission BLER is recorded as TargetBLER _B ; the reference MCS ( That is, the reference value of the modulation and coding scheme of the first type of transport block) is denoted as MCS _AMC,B .

In this implementation, MCS _A is used to represent the MCS (that is, the second modulation and coding scheme) corresponding to the TB (that is, the second type of transport block) that currently contains the data stream _A ; The MCS (ie, the first modulation and coding scheme) corresponding to the TB of B (ie, the first type of transport block); _ΔMCS represents the offset between the reference values of the modulation and coding schemes of the two types of transport blocks.

The error rate of the physical layer TB of data stream _A is carried in the TA duration before the current moment, i.e. the second block error rate, denoted as BLER _TB,A ; the data stream _A is not carried in the TB duration before the current moment but The error rate of the physical layer TB carrying the data stream B, that is, the first block error rate, is denoted as BLER _TB,B .

In this implementation manner, the first block error rate and the second block error rate may be determined in a statistical manner, or one or more values with smaller dimensions may be calculated by operations such as linear or nonlinear filtering, and the values may be used as For the block error rate, this embodiment does not limit the way of acquiring the block error rate.

In this implementation manner, the channel quality of the channel used to transmit the data stream A and the data stream B within the T _CQ period before the current moment can be calculated according to the channel measurement result fed back by the receiver, and recorded as

The channel quality may also be calculated based on operations such as linear or nonlinear filtering, and one or more signal qualities are calculated, and the final channel quality is obtained by performing weighted average processing on the multiple signal qualities. For example, the worst channel quality, the best channel quality, the fluctuation value of the channel quality, or the weighted average result of the channel quality at different times can be calculated as the final channel quality, which can avoid recording too much data and reduce storage and subsequent computational complexity. This embodiment does not limit

calculation method.

One way to adjust MCS _AMC,B is as follows:

in,

represents the historical reference value of the modulation and coding scheme of the first-type transport block, f _AMC represents TargetBLER _B ,

BLER _TB,B ,

For the mapping relationship with MCS _AMC,B , this embodiment does not limit the specific mapping scheme of f _AMC .

One way to calculate _ΔMCS is as follows:

in,

Represents the offset between the historical reference value of the modulation and coding scheme of the first type of transport block and the historical reference value of the modulation and coding scheme of the second type of transport block; g _AMC represents

BLER _TB,A , MCS _AMC,B , BLER _TB,B ,

As for the mapping relationship between ΔMCS and _ΔMCS , this embodiment does not limit the specific mapping scheme of _gAMC . Alternatively, _ΔMCS can also be set to a fixed amount based on experience or needs.

An adjustment method of MCS _B is as follows: MCS _B =η(MCS _AMC,B ); an adjustment method of MCS _A is as follows: MCS _A =η( _MCS _AMC,B -ΔMCS ). Among them, n represents the mapping relationship between the reference value of the modulation and coding scheme and the modulation and coding scheme. The specific mapping manner of n is not limited, for example, n can adopt schemes such as quantization and approximation.

After adjustment to obtain MCS _B and MCS _A , when the TB carrying data stream A needs to be sent, MCS _A is selected for transmission; when the TB that does not carry data stream A but carries data stream B needs to be sent, MCS _B is selected as the to send.

In other implementations of this embodiment, the MCS of the data stream A may be selected as the reference MCS, and subsequent adjustments may be made. The specific implementation will not be repeated here, and only the first type of transmission block and the first type of transmission block and the The relevant information of the two-type transport block can be replaced.

Taking the first type of transport block as the aforementioned second type of transport block and the second type of transport block as the aforementioned first type of transport block as an example, the following describes how to determine the modulation and coding method of the transport block based on the block error rate and channel quality in this embodiment. Another way to do it.

In this implementation, the initial transmission BLER of data stream A is required as the target initial transmission BLER of the second type of transport block, that is, as the block error rate threshold of the second type of transport block, and denoted as TargetBLER _A ; The initial transmission BLER of B is used as the target initial transmission BLER of the first type transport block, that is, as the block error rate threshold of the first type transport block, and TargetBLER _B .

MCS _A represents the MCS corresponding to the TB containing data stream A, that is, the second modulation and coding method; MCS _B represents the MCS corresponding to the TB that does not contain data stream A but contains data stream B, that is, represents the first modulation and coding method.

calculation method.

The reference MCS of the second type of transport block is denoted as MCS _AMC,A , and a way to calculate MCS _AMC,A is as follows:

in,

represents the historical reference value of the modulation and coding scheme of the second type of transport block; f' _AMC represents TargetBLER _A ,

BLER _TB,A ,

As for the mapping relationship with MCS _AMC,A , this embodiment does not limit the specific mapping scheme of f' _AMC .

The reference MCS of the first type of transport block is denoted as MCS _AMC,B , and a way to calculate MCS _AMC,B is as follows:

in,

represents the historical reference value of the modulation and coding scheme of the first type of transport block; f _AMC represents TargetBLER _B ,

BLER _TB,B ,

As for the mapping relationship with MCS _AMC,B , the specific mapping scheme of f _AMC is not limited in this embodiment.

The exemplary calculation methods of the first modulation and coding scheme MCS _B and the second modulation and coding scheme MCS _A are as follows:

MCS _B = η (MCS _{AMC, B} ),

MCS _A =η(MCS _AMC,A ).

After MCS _B and MCS _A are calculated, MCS _A is selected for sending when the TB carrying data stream A needs to be sent; when the TB that does not carry data stream A but carries data stream B needs to be sent, MCS _B is selected for sending.

In another embodiment of the present application, the multiple data streams sent by the sending end within the first time period may further include a third data stream, and the quality of service of the third data stream is lower than that of the second data stream.

This embodiment may include a transport block that only carries data stream A, a transport block that only bears data stream A and data stream B, a transport block that bears only data stream A, data stream B, and data stream C, and a transport block that only bears data stream B The transport block, the transport block that carries the data stream B and the data stream C, only carries the data stream C.

In this embodiment, only the transport block carrying data stream A, the transport blocks carrying only data stream A and data stream B, and the transport blocks carrying data stream A, data stream B and data stream C may be collectively referred to as carrying the data stream The transport block of A; the transport block that only carries the data stream B, and the transport block that carries the data stream B and the data stream C may be collectively referred to as the transport block that carries the data stream B.

As shown in Figure 4, the data stream carrying situation of the physical layer TBs sorted from left to right is as follows: the physical layer TB carrying only data stream A, carrying the physical layer transport blocks of data stream A and data stream B, carrying only data The physical layer TB of flow B carries the physical layer TB of data flow B and data flow C, and the physical layer TB of data flow C and data flow A carries the physical layer TB of data flow A, data flow B and data flow C. Layer TB, which only carries the physical layer TB of data stream C.

Correspondingly, the method for transmitting a data stream in this embodiment, in addition to the steps in the method shown in FIG. 3 , may further include: 303: Use a third modulation and coding manner corresponding to the third type of transport block to send in the first period of time The third type of transport block, the data stream carried by the third type of transport block only includes the third data stream.

In this embodiment, for the manner of determining the third modulation and coding scheme corresponding to the transport block of the third type, reference may be made to the aforementioned determination of the second modulation and coding scheme corresponding to the transport block of the second type.

As an example, the third modulation and coding scheme may be determined based on the foregoing first implementation manner of determining the second modulation and coding scheme. For example, the third modulation and coding mode can be determined by the following relation:

MCS _C = η (MCS _{AMC, B} - Δ' _MCS ),

Wherein, Δ' _MCS represents the offset of the reference value of the historical modulation and coding scheme of the first type of transport block and the third type of transport block;

Represents the offset of the reference value of the historical modulation and coding scheme between the first type of transport block and the third type of transport block; g' _MCS represents CQ _TCQ , BLER _TB,C , MCS _AMC,B , BLER _TB,B ,

In the mapping relationship with Δ' _MCS , MCS _C represents the MCS (ie, the third modulation and coding scheme) corresponding to the TB (ie, the third type of transport block) that currently only includes the data stream C.

In this embodiment, the specific mapping scheme of g' _MCS is not limited, and, optionally, Δ' _MCS may also be set as a fixed amount based on experience or requirements.

As another example, the third modulation and coding scheme may be determined based on the foregoing second implementation manner of determining the second modulation and coding scheme. For example, the third modulation and coding mode can be determined by the following relation:

MCS _C = η (MCS _{AMC, C} ),

in,

Represents the historical reference value of the modulation and coding scheme of the third type of transport block; f" _AMC represents TargetBLER _C ,

BLER _TB,C ,

The mapping relationship with MCS _{AMC, C} , this embodiment does not limit the specific mapping scheme of f" _AMC .

In this embodiment, after determining the first modulation and coding scheme, the second modulation and coding scheme, and the third modulation and coding scheme, it is necessary to send the TB carrying stream A, and select MCS _AMC,A for transmission; When a TB carrying stream B is sent, MCS _{AMC, B} is selected for transmission; when a TB carrying only data stream C is sent, MCS _{AMC, C} is selected for transmission.

As another example, when the second modulation and coding scheme is determined based on the reference value of the modulation and coding scheme of the first type of transport block and the offset between the reference value and the reference value of the modulation and coding scheme of the second type of transport block, A reference value of the current modulation and coding scheme of the transport block of the third type may be calculated, and a third modulation and coding scheme may be calculated based on the reference value.

For example, on the basis of determining the first modulation and coding mode and the second modulation and coding mode based on the foregoing first method, the third modulation and coding mode can be calculated by the following relational expression:

MCS _C =η(MCS _AMC,C ).

The methods in the various embodiments of the present application can effectively avoid the transmission requirements of data streams with high QoS when the sender needs to send services with different QoS transmission requirements or data streams with different QoS transmission requirements. The problem that the reduced MCS cannot be lifted can improve the transmission efficiency of other data streams, and ultimately reduce the waste of air interface resources.

The method for transmitting data streams proposed in the present application may further include more data streams with different QoS transmission requirements, and the modulation and coding modes corresponding to the transport blocks carrying these data streams can be determined by referring to the above-mentioned correspondence of the third type of transport blocks. The determination method of the modulation and coding mode is not repeated here.

It can be understood that the method shown in FIG. 3 or FIG. 5 of the present application can also be applied to other types of communication systems, for example, can be applied to a wireless local area network or a fixed network.

FIG. 6 and FIG. 7 are schematic structural diagrams of possible communication apparatuses provided by embodiments of the present application. These communication apparatuses can be used to implement the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments.

In the embodiment of the present application, the communication device may be the terminal device 130 or the terminal device 140 as shown in FIG. 1 , or may be a module (such as a chip) applied to the terminal device; or, the communication device may be connected to a network It can also be a module (such as a chip) applied to an access network device. For example, the communication device can be the wireless access network device 120 shown in FIG. 1 or can be applied to the wireless access network device 120. modules (eg chips).

As shown in FIG. 6 , the communication apparatus 600 includes a sending module 601 . The communication device 600 is used to implement the method shown in FIG. 3 or FIG. 5 above. The sending module 601 may also be referred to as a sending unit 601 .

For example, when the communication apparatus 600 is configured to implement the method shown in FIG. 3 , the sending module 601 is configured to: send the first type of transmission block using the first modulation and coding manner corresponding to the first type of transport block in the first period of time A transport block; in the first period, the second type of transport block is sent using a second modulation and coding manner corresponding to the second type of transport block. Wherein, the data stream carried by one of the transport blocks of the first type and the transport blocks of the second type includes the first data stream, and the data stream carried by the other transport block includes the second data stream and excluding the first data stream, the quality of service of the first data stream is higher than the quality of service of the second data stream.

For another example, when the communication apparatus 600 is configured to implement the method shown in FIG. 5 , the sending module 601 is configured to: the sending module 601 is configured to: use the first modulation code corresponding to the first type of transport block in the first period of time The first type of transport block is sent in the first time period; the second type of transmission block is sent using the second modulation and coding scheme corresponding to the second type of transmission block in the first period; the third transmission block is used in the first period of time. The third transmission block is sent in a third modulation and coding manner corresponding to the block. Wherein, the data stream carried by one of the transport blocks of the first type and the transport blocks of the second type includes a data stream, and the data stream carried by the other transport block includes the second data stream and does not include all the first data stream, the quality of service of the first data stream is higher than that of the second data stream, the data stream carried by the third transport block only includes the third data stream, and the third data stream The quality of service is lower than the quality of service of the second data stream.

More detailed descriptions of the above-mentioned sending module 601 can be obtained directly by referring to the relevant descriptions in the method embodiments shown in FIG. 3 or FIG. 5 , and details are not repeated here.

As shown in FIG. 7 , the communication apparatus 700 includes a processor 701 and an interface circuit 702 . The processor 701 and the interface circuit 702 are coupled to each other. It can be understood that the interface circuit 702 can be a transceiver or an input-output interface. Optionally, the communication apparatus 700 may further include a memory 703 for storing instructions executed by the processor 701 or input data required by the processor 701 to execute the instructions or data generated after the processor 701 executes the instructions.

When the communication apparatus 700 is used to implement the method shown in FIG. 3 or FIG. 5 , the processor 701 is used to determine various modulation and coding modes, and the interface circuit 702 is used to implement the function of the above-mentioned sending module 601 .

When the above communication device is a chip applied to a terminal device or a chip of an access network device, the chip implements the above method embodiments. The chip receives information from other modules (such as radio frequency modules or antennas) in the device it belongs to, and the information is sent by other devices to the device to which the chip belongs; or, the chip sends other modules (such as radio frequency modules or antennas) in the device it belongs to. information, which is sent by the device to which the chip belongs to other devices.

It can be understood that the processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions. Software instructions may be composed of corresponding software modules, and software modules may be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may reside in an ASIC. Alternatively, the ASIC may be located in a network device or in an end device. Of course, the processor and the storage medium may also exist in the network device or the terminal device as discrete components.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus. The computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website site, computer, A server or data center transmits by wire or wireless to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server, data center, or the like that integrates one or more available media. The usable media may be magnetic media, such as floppy disks, hard disks, magnetic tapes; optical media, such as digital video discs; and semiconductor media, such as solid-state drives.

In the various embodiments of the present application, if there is no special description or logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In this application, "at least one" means one or more, and "plurality" means two or more. "And/or", which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. In the text description of this application, the character "/" generally indicates that the related objects are a kind of "or" relationship; in the formula of this application, the character "/" indicates that the related objects are a kind of "division" Relationship.

It can be understood that, the various numbers and numbers involved in the embodiments of the present application are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the sequence numbers of the above processes does not imply the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic.

Claims

A method for transmitting a data stream, the method is applied to a communication device, the communication device sends a plurality of data streams of the same service in a first period, the plurality of data streams include a first data stream and a second data stream , the quality of service of the first data flow is higher than the quality of service of the second data flow, wherein the method includes:

sending the first type of transport block using the first modulation and coding scheme corresponding to the first type of transport block in the first period;

sending the second type of transport block in the first period by using a second modulation and coding scheme corresponding to the second type of transport block;

Wherein, the data stream carried by one type of transport block of the first type of transport block and the second type of transport block includes the first data stream, and the data stream carried by the other type of transport block includes the The second data stream does not include the first data stream.
The method according to claim 1, wherein the first modulation and coding scheme and the second modulation and coding scheme are different modulation and coding schemes.
The method according to claim 1 or 2, wherein the first modulation and coding manner is determined based on a first block error rate of the first type of transport block within a first time period before the first time period The second modulation and coding scheme is determined based on a second block error rate of the second type of transport block within a second time period before the first period.
The method according to claim 3, wherein the first modulation and coding mode and the first block error rate satisfy the following relationship:

MCS B = η (MCS AMC, B ),

Wherein, MCS B represents the first modulation and coding scheme, MCS AMC,B represents the current reference value of the modulation and coding scheme of the first-type transport block, and n indicates the mapping between the reference value of the modulation and coding scheme and the modulation and coding scheme relation,

Wherein, TargetBLER B represents the block error rate threshold of the first type of transport block,
represents the historical reference value of the modulation and coding scheme of the first type of transport block, BLER TB, B represents the first block error rate,
represents the channel quality of the channel used to transmit the service between the communication device and the receiving end of the service, f AMC represents TargetBLER B ,
BLER TB,B ,
Mapping relationship with MCS AMC,B .
The method according to claim 4, wherein the second modulation and coding mode and the second block error rate satisfy the following relationship:

MCS A = η( MCS AMC, B -ΔMCS ),

Wherein, MCS A represents the second modulation and coding scheme, and ΔMCS represents the difference between the current reference value of the modulation and coding scheme of the first type of transport block and the current reference value of the modulation and coding scheme of the second type of transport block. Offset,

Among them, BLER TB,A represents the second block error rate, g AMC represents
BLER TB,A , MCS AMC,B , BLER TB,B ,
and the mapping relationship between ΔMCS ,
Indicates the offset between the historical reference value of the modulation and coding scheme of the transport block of the first type and the historical reference value of the modulation and coding scheme of the transport block of the second type.
The method according to claim 4, wherein the second modulation and coding mode and the second block error rate satisfy the following relationship:

MCS A = η (MCS AMC, A ),

Wherein, MCS AMC,A represents the current reference value of the modulation and coding scheme of the second type of transport block, MCS A represents the second modulation and coding scheme,

Wherein, TargetBLER A represents the block error rate threshold of the second type of transport block,
represents the historical reference value of the modulation and coding scheme of the second type of transport block, BLER TB,A represents the second block error rate, f' AMC represents TargetBLER A ,
BLER TB,A ,
Mapping relationship with MCS AMC,A .
The method according to any one of claims 1 to 6, wherein the plurality of data streams further comprises a third data stream, and the quality of service of the third data stream is lower than that of the second data stream service quality;

Accordingly, the method further includes:

In the first period, the third transport block is sent using a third modulation and coding manner corresponding to the third transport block, and the data stream carried by the third transport block only includes the third data stream.
A communication device, the communication device sends multiple data streams of the same service in a first period, the multiple data streams include a first data stream and a second data stream, and the first data stream has high service quality Regarding the quality of service of the second data stream, the communication device includes:

a sending module, configured to send the first type of transport block by using the first modulation and coding manner corresponding to the first type of transport block in the first period;

The sending module is further configured to send the second type of transport block using a second modulation and coding manner corresponding to the second type of transport block in the first period;

Wherein, the data stream carried by one of the transport blocks of the first type and the transport blocks of the second type includes the first data stream, and the data stream carried by the other transport block includes the second data stream and does not include the first data stream.
The communication apparatus according to claim 8, wherein the first modulation and coding scheme and the second modulation and coding scheme are different modulation and coding schemes.
The communication device according to claim 8 or 9, wherein the first modulation and coding scheme is based on a first block error rate of the first type of transport block within a first time period before the first time period It is determined that the second modulation and coding manner is determined based on a second block error rate of the second type of transport block within a second time period before the first time period.
The communication device according to claim 10, wherein the first modulation and coding scheme and the first block error rate satisfy the following relationship:

MCS B = η (MCS AMC, B ),

Wherein, MCS B represents the first modulation and coding scheme, MCS AMC,B represents the current reference value of the modulation and coding scheme of the first-type transport block, and n indicates the mapping between the reference value of the modulation and coding scheme and the modulation and coding scheme relation,

Wherein, TargetBLER B represents the block error rate threshold of the first type of transport block,
represents the historical reference value of the modulation and coding scheme of the first type of transport block, BLER TB, B represents the first block error rate,
represents the channel quality of the channel used to transmit the service between the communication device and the receiving end of the service, f AMC represents TargetBLER B ,
BLER TB,B ,
Mapping relationship with MCS AMC,B .
The communication device according to claim 11, wherein the second modulation and coding scheme and the second block error rate satisfy the following relationship:

MCS A = η( MCS AMC, B -ΔMCS ),

Wherein, MCS A represents the second modulation and coding scheme, and Δ MCS represents the difference between the current reference value of the modulation and coding scheme of the first type of transport block and the current reference value of the modulation and coding scheme of the second type of transport block. Offset,

Among them, BLER TB,A represents the second block error rate, g AMC represents
BLER TB,A , MCS AMC,B , BLER TB,B ,
and the mapping relationship between ΔMCS ,
Indicates the offset between the historical reference value of the modulation and coding scheme of the transport block of the first type and the historical reference value of the modulation and coding scheme of the transport block of the second type.
The communication device according to claim 11, wherein the second modulation and coding scheme and the second block error rate satisfy the following relationship:

MCS A = η (MCS AMC, A ),

Wherein, MCS AMC,A represents the current reference value of the modulation and coding scheme of the second type of transport block, MCS A represents the second modulation and coding scheme,

Wherein, TargetBLER A represents the block error rate threshold of the second type of transport block,
represents the historical reference value of the modulation and coding scheme of the second type of transport block, BLER TB,A represents the second block error rate, f' AMC represents TargetBLER A ,
BLER TB,A ,
Mapping relationship with MCS AMC,A .
The communication device according to any one of claims 8 to 13, wherein the plurality of data streams further comprises a third data stream, and the quality of service of the third data stream is lower than that of the second data stream quality of service;

Correspondingly, the sending module is also used for:

In the first period, the third transport block is sent using a third modulation and coding manner corresponding to the third transport block, and the data stream carried by the third transport block only includes the third data stream.
A communication device, characterized by comprising a processor and an interface circuit, wherein the interface circuit is configured to receive signals from other communication devices other than the communication device and transmit to the processor or transfer signals from the processor The signal is sent to other communication devices other than the communication device, and the processor is used to implement the method according to any one of claims 1 to 7 by means of a logic circuit or executing code instructions.
A computer-readable medium, characterized in that, a computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed by a communication device, the computer program or instruction as described in any one of claims 1 to 7 is implemented. method.
A computer program product, comprising computer program code, characterized in that, when the computer program code is run on a computer, the computer program code causes the computer to implement the method according to any one of claims 1 to 7.
A communication system, characterized by comprising the communication device according to any one of claims 8 to 14.