WO2016082429A1

WO2016082429A1 - Data transmission method and apparatus

Info

Publication number: WO2016082429A1
Application number: PCT/CN2015/076592
Authority: WO
Inventors: 孙颖; 李萍; 张婷; 黄�俊
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-11-25
Filing date: 2015-04-15
Publication date: 2016-06-02
Also published as: CN105703874A

Abstract

Disclosed are a data transmission method and apparatus, wherein the method comprises: according to a service attribute of a plurality of services, packaging the plurality of services, and mapping the packaged services onto a corresponding resource for transmission. By means of the present invention, the problem in the related prior art that services of different attributes in the same UE cannot be packaged into different scheduling packets to be simultaneously transmitted can be solved.

Description

Data transmission method and device

Technical field

The present invention relates to the field of communications, and in particular to a data transmission method and apparatus.

Background technique

There are various types of user data that need to be transmitted in the LTE protocol, such as signaling information that requires high block error rate and real-time information that requires high latency. Therefore, different data types need to be mapped to different QCIs (QoS). Class Identifier level to obtain the corresponding Quality of Service (QoS) guarantee.

There are nine QCI (QoS Class Identifier) levels defined in the LTE protocol. The priorities of different QCI levels, packet delay, and acceptable packet error rate are different, as shown in the following table:

In the LTE protocol, different levels of QCI need to be created. Different bearers scheduled by the same user in the same subframe can only be encapsulated into one scheduling packet, using the same transmission mode, modulation mode, and MCS level. Therefore, the packet error rate is the same. For the bearer with strict packet loss rate, the AM mode is generally configured to improve the accuracy of the air interface transmission. The retransmission can ensure the packet loss rate, but the packet delay is increased.

For the problem that the services of different UEs of the same UE in the related art cannot be encapsulated into different scheduling packets and transmitted at the same time, an effective solution has not been proposed yet.

Summary of the invention

The embodiment of the invention provides a data transmission method and device, so as to solve at least the problem that the services of different attributes of the same UE in the related art cannot be encapsulated into different scheduling packets and transmitted simultaneously.

According to an aspect of the present invention, a data transmission method is provided, including: encapsulating the multiple services according to service attributes of multiple services; and mapping the encapsulated services to corresponding resources for transmission.

In the embodiment of the present invention, the encapsulating the multiple services according to the service attributes of the multiple services includes: encapsulating services with the same delay requirement or the same packet loss rate as the corresponding scheduling in the multiple services. package.

In the embodiment of the present invention, mapping the encapsulated service to the corresponding resource for transmission includes: determining whether the data of the multiple services needs to be interleaved; and if the determination result is no, the Data of the plurality of services are respectively mapped to the corresponding resources; and/or, if the result of the determination is yes, the data of the plurality of services is interleaved; and the data of the plurality of services after the interleaving is processed Map to the corresponding resource for transmission.

In the embodiment of the present invention, performing interleaving processing on the data of the multiple services includes: respectively connecting data of the same layer of the multiple services in a predetermined order, and performing interleaving processing on data of each layer according to a predetermined rule. .

In the embodiment of the present invention, the interleaving process for each layer of data according to a predetermined rule includes at least one of the following: performing interleaving processing by using a two-stream multi-layer method of spatial multiplexing, wherein the two-stream multi-layer manner In order to form multi-layer data into multiple layers of data according to the order of the plurality of services, the multi-layer data is interleaved in a single data unit to form new multi-layer data; and the first-class two-layer method of transmitting diversity is used for interleaving processing. The first-class two-layer manner is to form two layers of data into two layers of data according to the sequence of the multiple services, and the two layers of data are respectively interleaved by using two adjacent data groups; using transmit diversity When the first-class four-layer mode is interleaved, the first-class four-layer mode is to connect four layers of data in a certain order according to the four layers of data of the plurality of services, and the four layers of data are respectively adjacent to four. The data is interleaved in a group; the interleaving process is performed in a single stream single layer manner, wherein the single stream single layer mode is formed according to the sequence of the multiple services Data, the data for a single interleaving processing.

According to another aspect of the present invention, a data transmission apparatus is provided, comprising: a packaging module configured to encapsulate the plurality of services according to service attributes of a plurality of services; and a transmission module configured to map the encapsulated services Transfer to the corresponding resource.

In the embodiment of the present invention, the encapsulating module includes: an encapsulating unit, configured to encapsulate a service with the same delay requirement or the same packet loss rate as the corresponding scheduling packet in the multiple services.

In the embodiment of the present invention, the transmission module includes: a determining sub-module, configured to determine whether it is necessary to perform interleaving processing on data of the multiple services; and mapping the sub-module, if the determining result is negative, The data of the multiple services are respectively mapped to the corresponding resources; and/or the interleaving processing sub-module is configured to perform interleaving processing on the data of the multiple services when the determination result is yes; And configured to map the data of the multiple services after the interleaving process to corresponding resources for transmission.

In the embodiment of the present invention, the interleaving processing sub-module includes: an interleaving processing unit, configured to respectively connect data of the same layer of the multiple services in a predetermined order, and interleave data of each layer according to a predetermined rule deal with.

In the embodiment of the present invention, the interleaving processing unit includes at least one of: a first interleaving processing sub-unit, configured to perform interleaving processing in a manner of spatial multiplexing of two streams and multiple layers, wherein the two-stream multi-layer The method is to form multi-layer data into multiple layers of data according to the sequence of the multiple services, and the multi-layer data is respectively interleaved in units of single data to form new multi-layer data; the second interleaving processing sub-unit is set to transmit diversity. The first-class two-layer method performs interleaving processing, wherein the first-class two-layer manner is to form two layers of data into two layers of data according to the sequence of the plurality of services, and the two layers of data are respectively two adjacent data. a group of performing interleaving processing; the third interleaving processing sub-unit is configured to perform interleaving by using a first-class four-layer method of transmitting diversity, wherein the first-class four-layer manner is according to four layers of data of the plurality of services. The order of the four layers of data is connected, the four layers of data are respectively interleaved by a group of four adjacent data; the fourth interleaving processing subunit is set to adopt a single stream single Interleaving processing performed manner, wherein the single-stream mode to form a monolayer in accordance with the order of the plurality of service data to a single data interleave processing.

According to the embodiment of the present invention, the multiple services are encapsulated according to the service attributes of the multiple services, and the encapsulated services are respectively mapped to the corresponding resources for transmission, and the services of different attributes of the same UE in the related technology cannot be solved. Encapsulated into different scheduling packets for simultaneous transmission.

DRAWINGS

The accompanying drawings are intended to provide a further understanding of the embodiments of the embodiments of the invention Improper limitations. In the drawing:

1 is a flow chart of a data transmission method according to an embodiment of the present invention;

2 is a block diagram of a data transmission device in accordance with an embodiment of the present invention;

3 is a block diagram 1 of a data transmission device in accordance with a preferred embodiment of the present invention;

4 is a block diagram 2 of a data transmission device in accordance with a preferred embodiment of the present invention;

Figure 5 is a block diagram 3 of a data transmission apparatus in accordance with a preferred embodiment of the present invention;

6 is a flow chart of a data transmission method in accordance with a preferred embodiment of the present invention.

detailed description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

A data transmission method is provided in this embodiment. FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102, encapsulating the multiple services according to the service attributes of the multiple services;

Step S104: Map the encapsulated service to the corresponding resource for transmission.

Through the above steps, for the same UE, according to different delays and error rate requirements of multiple services, each service may adopt different transmission modes and MCS levels, and form multiple service data blocks into multiple scheduling packets; The scheduling packets can be simultaneously mapped to the time-frequency resources for transmission, which solves the problem that the services of different attributes of the same UE in the related art cannot be encapsulated into different scheduling packets and transmitted at the same time.

In this embodiment, the encapsulating the multiple services according to the service attributes of the multiple services may include: encapsulating the services with the same delay request or the same packet loss rate as the corresponding scheduling packets, each of the multiple services. Different MCS levels can be used between the encapsulation services, so that transmission can be performed according to different transmission modes, and the packet loss rate is reduced.

The mapping the encapsulated services to the corresponding resources for transmission may include: determining whether the data of the multiple services needs to be interleaved; and if the determination result is no, the data of the multiple services is used. If the result of the determination is YES, the data of the plurality of services is interleaved; and the data of the plurality of services after the interleaving process is mapped to the corresponding resource for transmission.

There may be many ways to perform interleaving processing on the data of the multiple services. In an optional embodiment, performing interleaving processing on the data of the multiple services may include: pressing data of the same layer of the multiple services. The predetermined order is respectively connected, and the data of each layer is interleaved according to a predetermined rule.

As an optional implementation manner, performing interleaving processing on data of each layer according to a predetermined rule may include at least one of the following: performing interleaving processing by using a two-stream multi-layer method of spatial multiplexing, wherein the two-stream multi-layer manner In order to form multi-layer data into multiple layers of data according to the order of the plurality of services, the multi-layer data is interleaved in a single data unit to form new multi-layer data; and the first-order two-layer method of transmitting diversity is used for interleaving processing. The first-class two-layer method is to form two layers of data into two layers of data according to the sequence of the plurality of services, and the two layers of data are respectively interleaved by using two adjacent data groups; and the first-class four adopts transmit diversity. When the layers are interleaved, wherein the first-class four-layer mode is to connect four layers of data in a certain order according to the four layers of data of the plurality of services, and the four layers of data are respectively four adjacent data. A group performs interleaving; the interleaving process is performed by using a single stream single layer manner, wherein the single stream single layer mode forms one according to the order of the multiple services According to the data for a single interleaving processing.

The embodiment of the present invention further provides a data transmission device, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a block diagram of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 2, the package module 22 and the transmission module 24 are included.

The encapsulating module 22 is configured to encapsulate the multiple services according to service attributes of multiple services;

The transmission module 24 is configured to map the encapsulated service to a corresponding resource for transmission.

3 is a block diagram of a data transmission apparatus according to a preferred embodiment of the present invention. As shown in FIG. 3, the package module 22 includes:

The encapsulating unit 32 is configured to encapsulate the services with the same delay requirement or the same packet loss rate as the corresponding scheduling packets in the multiple services.

4 is a block diagram 2 of a data transmission apparatus according to a preferred embodiment of the present invention. As shown in FIG. 4, the transmission module 24 includes:

The determining sub-module 42 is configured to determine whether it is necessary to perform interleaving processing on data of the plurality of services;

The mapping sub-module 44 is connected to the determining sub-module 42 and configured to map the data of the plurality of services to corresponding resources when the determination result is negative; and/or,

The interleaving processing sub-module 46 is connected to the mapping sub-module 44, and is configured to perform interleaving processing on data of the plurality of services when the determination result is yes;

The transmission sub-module 48 is connected to the interleaving processing sub-module 46 and configured to map the data of the plurality of services after the interleaving process to corresponding resources for transmission.

FIG. 5 is a block diagram 3 of a data transmission apparatus according to a preferred embodiment of the present invention. As shown in FIG. 5, the interleaving processing sub-module 44 includes:

The interleaving processing unit 52 is configured to connect the data of the same layer of the plurality of services in a predetermined order, and perform interleaving processing on the data of each layer according to a predetermined rule.

Optionally, the interleaving processing unit 52 includes at least one of the following:

The first interleaving processing sub-unit is configured to perform interleaving processing by using a two-stream multi-layer method of spatial multiplexing, wherein the two-stream multi-layer manner is to form multi-layer data into multiple layers according to the sequence of the multiple services. The multi-layer data is interleaved in units of a single data to form new multi-layer data;

The second interleaving processing sub-unit is configured to perform interleaving processing by adopting a first-class two-layer method of transmitting diversity, wherein the first-class two-layer manner is to form two layers of data into two layers of data according to the sequence of the multiple services, and two layers. The data is interleaved by a group of two adjacent data;

The third interleaving processing sub-unit is configured to perform interleaving by using a first-class four-layer method of transmitting diversity, wherein the first-class four-layer method is to connect four layers of data in a certain order in a four-layer data of a plurality of services, and four The layer data is interleaved by a group of four adjacent data;

The fourth interleaving processing sub-unit is configured to perform interleaving processing by using a single stream single layer manner, wherein the single stream single layer manner forms one data according to the order of the plurality of services, and performs interleaving processing with a single data.

The embodiments of the present invention are further described below in conjunction with alternative embodiments.

The embodiments of the present invention are based on multiple bearers scheduled by the same user in the same subframe, and are respectively encapsulated into independent scheduling packets or scheduling packets with the same attributes (for example, the same delay requirement or the same packet loss rate requirement), and different bearers may be used. Different transmission modes, modulation modes, and MCS levels are used according to their own requirements to ensure packet loss rate and reduce delay caused by air interface retransmission, which makes the high-level scheduling strategy more flexible. The embodiment of the invention mainly describes a method for transmitting each service scheduling packet on different RBs when multiple single service scheduling packets are transmitted in a single UE. The number of multi-service scheduling packets to be sent is N. FIG. 6 is a flowchart of a data transmission method according to a preferred embodiment of the present invention. As shown in FIG. 6, the method includes the following steps:

Step S602, let i=1;

Step S604, taking the i-th service original bit data of the UE;

Step S606, performing bit-level processing on the service original data, including: CRC addition, code block concatenation, Turbo coding, rate matching, code block concatenation, scrambling, and the like;

Step S608, performing symbol level processing on the data processed by the service bit level, including: modulation, layer mapping, transmission precoding, precoding, and the like;

Step S610, taking i=i+1;

Step S612, it is determined whether i is less than or equal to N, and if so, step S604 is performed, and if not, step S614 is performed;

Step S614, it is determined whether it is necessary to perform interleaving of each service data, if the determination result is yes, step S616 is performed, and if the determination result is no, step S620 is performed;

Step S616, interleaving each service data, and respectively connecting data of the same layer of all services in a certain order; the data of each layer is interleaved according to a certain rule, and for the transmission mode is transmit diversity, adjacent to The two/four data are united for overall interleaving;

Step S618: Perform uniform resource mapping on the interleaved data, and map the interleaved UE multi-service information to the corresponding RB resource according to the scheduling situation, and the different services cannot be distinguished from the RB location;

In step S620, if the service data interleaving is not required, the service resource mapping is performed, and the N symbol-level processed service information is mapped to the corresponding RB resource according to the scheduling situation, and the RB location can distinguish different services. Different RB resources occupy different locations.

Through the above steps, physical layer processing at the time of simultaneous transmission of a single UE multi-service can be realized.

Example 1

The following two types of UE service scheduling packets are used as an example, and both of the two-stream and two-layer large-delay CDD transmission modes are used, and each service data is interleaved.

Obtain the original bit information of the first service of the UE, perform bit level processing, including CRC addition, code block concatenation, Turbo coding, rate matching, code block concatenation, and scrambling; then perform symbol level processing, including modulation and layer mapping. , precoding. The original bit information of the second service of the UE is taken, and bit level processing is performed, including CRC addition, code block concatenation, Turbo coding, rate matching, code block concatenation, and scrambling. Perform symbol level processing, including modulation, layer mapping, and precoding. The data of the two services are interleaved: firstly, the data of the two layers are respectively connected in the order of the service 1 and the service 2 to form two layers of data; then the two layers of data are respectively in units of single data, and the rows are preferentially ranked. The method (that is, the first line, the second line, and so on) is arranged into a matrix of M*K, and then sequentially taken out by the column-first method (ie, the first column, the second column, and so on). Data, reforming a set of interleaved data. According to the scheduling situation, the two layers of data of the two services that are interleaved by the UE are uniformly mapped to the corresponding RB resources, and each service is inseparable at the RB position.

Example 2

The above three UE service scheduling packets are taken as an example, and all of the service data are not interleaved.

Obtaining the original bit information of the first service of the UE, performing bit level processing, including CRC addition, code block concatenation, Turbo coding, rate matching, code block concatenation, scrambling, and performing symbol level processing, including modulation, layer mapping, Transmitting precoding, precoding; taking the original bit information of the second service of the UE, performing bit level processing, including CRC addition, code block concatenation, Turbo coding, rate matching, code block concatenation, and scrambling. Perform symbol level processing, including modulation, layer mapping, transmit precoding, precoding; take raw bit information of the third service of the UE, perform bit level processing, including CRC addition, code block concatenation, Turbo coding, rate matching, code Block cascading, scrambling, symbol level processing, including modulation, layer mapping, transmit precoding, precoding. The three service information are separately mapped according to the respective scheduling conditions, and each service can be distinguished at the RB position.

Example 3

The following two types of UE service scheduling packets are used as an example, and all of the two-layer and two-layer transmit diversity transmission modes are used, and each service data is interleaved.

Take the original bit information step of the first service of the UE, perform bit level processing, including CRC addition, code block cascading, Turbo coding, rate matching, code block cascading, scrambling, and perform symbol level processing, including modulation and layer mapping. Precoding; taking the original bit information of the second service of the UE, performing bit level processing, including CRC addition, code block Cascading, Turbo coding, rate matching, code block concatenation, scrambling, symbol level processing, including modulation, layer mapping, precoding. Interleaving the data of the two services, firstly connecting the two layers of data in the order of service 1 and service 2 to form two layers of data; then, the two layers of data are respectively grouped by two adjacent data. According to the row-first method (that is, the first row, the second row, and so on), a matrix of M*K is arranged, that is, each element in the matrix is composed of two data, and the row is exchanged, and then The column-first method (ie, the first column, the second column, and so on) sequentially fetches the data (still two sets of data are taken together) and reforms the set of interleaved data. According to the scheduling situation, the two layers of data of the two services that are interleaved by the UE are uniformly mapped to the corresponding RB resources, and each service is inseparable at the RB position.

Example 4

The above three UE service scheduling packets are taken as an example, and all of the service data are interleaved.

Obtaining the original bit information of the first service of the UE, performing bit level processing, including CRC addition, code block concatenation, Turbo coding, rate matching, code block concatenation, scrambling, and performing symbol level processing, including modulation, layer mapping, Transmitting precoding, precoding; taking the original bit information of the second service of the UE, performing bit level processing, including CRC addition, code block cascading, Turbo coding, rate, matching, code block cascading, scrambling, and performing symbol level Processing, including modulation, layer mapping, transmit precoding, precoding; taking raw bit information of the third service of the UE, performing bit level processing, including CRC addition, code block cascading, Turbo coding, rate matching, code block cascading , scrambled. Perform symbol level processing, including modulation, layer mapping, transmit precoding, precoding; interleave data of three services, first connect the data together in the order of service 1, service 2, and service 3 to form a big data Then, in a single data unit, row-first method (ie, first line, second line, and so on) is arranged into a matrix of M*K, column exchange, and column-first method (ie First, the first column, then the second column, and so on) sequentially fetch the data and re-form a set of interleaved data. According to the scheduling situation, the three service data interleaved by the UE are uniformly mapped to the corresponding RB resources, and each service is inseparable at the RB position.

It should be noted that, in the embodiment of the present invention, the process of multi-service transmission is mainly described. Each service module performs bit-level, symbol-level processing, pre-coding layer mapping, interleaving, and finally resource mapping transmission.

Obviously, those skilled in the art should understand that the above modules or steps of the embodiments of the present invention can be implemented by a general computing device, which can be concentrated on a single computing device or distributed in multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or The implementation of multiple modules or steps in them into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the foregoing embodiments and the preferred embodiments solve the problem that the services of different attributes of the same UE in the related art cannot be encapsulated into different scheduling packets and transmitted at the same time.

Claims

A data transmission method includes:

Encapsulating the plurality of services according to service attributes of multiple services;

The encapsulated service is mapped to the corresponding resource for transmission.
The method of claim 1, wherein the encapsulating the plurality of services according to the service attributes of the plurality of services comprises:

The services in which the delay requests are the same or the packet loss rate requirements are the same are encapsulated into corresponding scheduling packets.
The method of claim 1, wherein mapping the encapsulated service to the corresponding resource for transmission comprises:

Determining whether it is necessary to perform interleaving processing on data of the plurality of services;

If the determination result is no, the data of the plurality of services are respectively mapped to the corresponding resources; and/or,

When the determination result is yes, the data of the plurality of services is interleaved;

Mapping the data of the multiple services after the interleaving process to corresponding resources for transmission.
The method of claim 3, wherein the interleaving processing of the data of the plurality of services comprises:

The data of the same layer of the plurality of services are respectively connected in a predetermined order, and the data of each layer is separately interleaved according to a predetermined rule.
The method according to claim 4, wherein the interleaving processing of the data of each layer according to a predetermined rule includes at least one of the following:

Interleaving processing is performed by means of spatial multiplexing of two streams and multiple layers, wherein the two-stream multi-layer manner is to form multi-layer data into multiple layers of data according to the sequence of the plurality of services, and the multi-layer data is respectively a single data. Interleaving for units to form new multi-layer data;

Interleaving is performed by using a first-class two-layer method of transmitting diversity. The first-class two-layer mode is to form two layers of data into two layers according to the sequence of the multiple services, and the two layers of data are respectively adjacent to the two. Data is interleaved for a group;

When the interleaving is performed by the first-class four-layer method of the transmit diversity, the first-class four-layer mode is to connect the four layers of data according to the four layers of the plurality of services in a certain order, and the four layers of data are respectively phased. The four adjacent data are interleaved as a group;

The interleaving process is performed in a single stream single layer manner, wherein the single stream single layer is formed by forming one data in the order of the plurality of services, and performing interleaving processing with a single data.
A data transmission device comprising:

Encapsulating the module, configured to encapsulate the multiple services according to service attributes of multiple services;

The transmission module is configured to map the encapsulated services to corresponding resources for transmission.
The device of claim 6, wherein the encapsulation module comprises:

The encapsulating unit is configured to encapsulate the services with the same delay requirement or the same packet loss rate as the corresponding scheduling packet in the multiple services.
The apparatus of claim 6 wherein said transmission module comprises:

a determining sub-module, configured to determine whether it is necessary to perform interleaving processing on data of the plurality of services;

a mapping submodule, configured to map data of the plurality of services to corresponding resources when the determination result is negative; and/or,

The interleaving processing sub-module is configured to perform interleaving processing on the data of the plurality of services if the determination result is yes;

The transmission submodule is configured to map the data of the multiple services after the interleaving process to corresponding resources for transmission.
The apparatus of claim 8, wherein the interleaving processing sub-module comprises:

The interleaving processing unit is configured to respectively connect data of the same layer of the plurality of services in a predetermined order, and perform interleaving processing on data of each layer according to a predetermined rule.
The apparatus of claim 9, wherein the interleaving processing unit comprises at least one of:

The first interleaving processing sub-unit is configured to perform interleaving processing by spatial multiplexing in a manner of two streams and multiple layers, wherein the two-stream multi-layer manner is to form two layers of data into two layers according to the sequence of the multiple services. Data, two layers of data are interleaved in units of single data to form new multi-layer data;

The second interleaving processing sub-unit is configured to perform interleaving processing by adopting a first-class two-layer method of transmitting diversity, wherein the first-class two-layer manner is to form two layers of data into two layers of data according to the sequence of the multiple services. The two layers of data are respectively interleaved by a group of two adjacent data;

The third interleaving processing sub-unit is configured to perform interleaving in a first-class four-layer manner by using transmit diversity, wherein the first-class four-layer manner is to perform four layers of data according to a certain order in four layers of data of the multiple services. Connected, the four layers of data are interleaved by a group of four adjacent data;

The fourth interleaving processing sub-unit is configured to perform interleaving processing by using a single-stream single-layer manner, wherein the single-stream single-layer manner is to form one data according to the order of the multiple services, and perform interleaving processing with a single data.