WO2012126401A1

WO2012126401A1 - Method and device for data transmission

Info

Publication number: WO2012126401A1
Application number: PCT/CN2012/073048
Authority: WO
Inventors: 罗超
Original assignee: 华为技术有限公司
Priority date: 2011-03-24
Filing date: 2012-03-26
Publication date: 2012-09-27
Also published as: CN102695214A

Abstract

Proposed is a method and device for data transmission, relating to the technical field of communications. The method in the present invention comprises: allocating a first transmission manner to a first part burst of a radio block and allocating a second transmission manner to a second part burst of the radio block; allocating packet data channels to the first part burst and the second part burst; transmitting the first part burst and the second part burst through the allocated data channels in the first transmission manner and the second transmission manner respectively. By way of the hybrid use of different transmission manners in a radio block, different slots in a radio block are transmitted in different transmission manners and the strengths of different transmission manners are utilized fully, improving the multiplexing efficiency of packet channels.

Description

Data transmission method and device

This application is submitted to the Chinese Patent Office on March 24, 2011, and the application number is

201110072415.6, the entire disclosure of which is incorporated herein by reference in its entirety in its entirety in its entirety in the the the the the the the the the Technical field

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

With the development of communication technology, GSM (Global System for Mobile Communications) system has undergone many evolutions and developments in the process of transition to the third generation mobile communication system. The packet services include GPRS (General Packet Radio Service) technology, EGPRS (Enhanced GPRS, Enhanced General Packet Radio Service) technology, EGPRS2 technology, and Precoded EGPRS2 technology. GPRS introduces the concept of a radio block, that is, a burst (burst) with the same slot number on four consecutive TDMA frames to form a radio block. From the GPRS technology, all information transmission is completed by establishing TBF (Temporary Block Flow), and a TBF is used to complete the transmission of several user information. The TBF is identified by a field in the radio block called TFI (Temporary Flow Identity). For the downlink TBF, the terminal checks each of the allocated one or more PDCHs (Packet Data Channels). The TFI in the header of a data block determines whether the data block belongs to itself. For the uplink TBF, the uplink resource allocation mode based on the USF (Uplink State Flag) is generally used to avoid collisions. When the network establishes an uplink TBF, the terminal allocates a USF to the terminal, and the terminal monitors the downlink radio block on the allocated one or more PDCHs. If the USF carried in the header is equal to the USF allocated to itself, the terminal may be in the terminal. The next radio block of the corresponding uplink PDCH is transmitted.

The BTTI (Basic Transmission Time Interval) transmission mode refers to the fact that the radio block occupies a burst on four consecutive TDMA frames in one slot (about 20 ms), as shown in Figure 1. The RTTI (Reduced Transmission Time Interval) transmission mode uses two slots of one radio block to transmit two slots, that is, the radio blocks of four consecutive TDMA frames on the original single PDCH are changed to dual PDCH. on An RTTI radio block of two consecutive TDMA frames, as shown in FIG. 2, in which an RTTI radio block is transmitted in two frames of Frame x and Frame x+1. Due to the introduction of RTTI, the terminal that does not support RTTI cannot solve the information transmitted through the RTTI transmission mode. At the same time, the introduction of RTTI also affects the mapping of the USF. To reduce the impact on traditional RTTI terminals, two USF modes are defined, namely: ΒΤΉ USF and RTTI USF. The former means that although the transmission mode of the radio block is RTTI, the transmission mode of the USF is still ambiguous, that is, the transmission of the USF spans two consecutive RTTI radio blocks, as shown in FIG. Therefore, in the ΒΤΉ USF configuration, even if the terminal does not support RTTI, the USF in the RTTI radio block can be solved. The RTTI USF means that the USF and the radio block are transmitted within 10ms, as shown in Figure 4. Therefore, in RTTI USF mode, the USF in the RTTI radio block can only be solved by the terminal that supports RTTI.

In the prior art, since the Precoded EGPRS2 introduces a new transmission mode, only the terminal supporting the Precoded EGPRS2 can solve the radio block transmitted by the Precoded EGPRS2 mode. Even if the USF configuration method is used, the USF carried by the USF can only be carried. Scheduling terminals that support Precoded EGPRS2 cannot schedule any other terminals that do not support Precoded EGPRS2. Therefore, even if the Precoded EGPRS2 terminal has a large amount of downlink traffic, the network can only send out the Precoded EGPRS2 radio block in order to schedule the traditional terminal that does not support Precoded EGPRS2, and then transmit the radio block transmitted in other ways (such as the EGPRS2 radio block). ), and ultimately the gain of the physical layer brought about by Precoded EGPRS2 is greatly reduced. Summary of the invention

In order to solve the problems in the prior art, embodiments of the present invention provide a data transmission method and apparatus. The technical solution is as follows:

A data transmission method, the method comprising:

Allocating a first transmission mode for the first part of the wireless block, and allocating a second transmission mode for the second part of the wireless block;

Allocating a packet data channel for the first partial burst and the second partial burst; respectively, the first partial burst and the second partial burst are respectively in the first transmission manner on the allocated data channel And transmitting in the second transmission mode.

The embodiment of the invention further provides a data transmission device, the device comprising:

a first allocation module, configured to allocate a first transmission mode to a first partial burst of the wireless block, and allocate a second transmission mode to the second partial burst of the wireless block; a second allocation module, configured to allocate a packet data channel for the first partial burst and the second partial burst;

And a transmitting module, configured to transmit the first partial burst and the second partial burst on the allocated data channel in the first transmission manner and the second transmission manner, respectively.

The technical solution provided by the embodiment of the present invention has the beneficial effects that: by using different transmission modes in one radio block, different time slots are transmitted through different transmission modes in one radio block, and the advantages of different transmission modes are fully utilized. , improving the multiplexing efficiency of the packet channel. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description For some embodiments of the present invention, other drawings may be obtained from those skilled in the art without departing from the drawings.

1 is a schematic structural diagram of a wireless block;

2 is a schematic structural diagram of an RTTI radio block;

3 is a schematic structural diagram of an RTTI radio block in a BTTI USF configuration;

4 is a schematic structural diagram of an RTTI radio block in an RTTI USF configuration;

FIG. 5 is a schematic flowchart of a data transmission method according to Embodiment 1 of the present invention; FIG.

6 is a schematic flow chart of an EGPRS2 and Precoded EGPRS2 hybrid transmission method according to Embodiment 2 of the present invention;

7 is a schematic structural diagram of a radio block in an EGPRS2 and Precoded EGPRS2 hybrid transmission method according to Embodiment 2 of the present invention;

FIG. 8 is a schematic structural diagram of a data transmission apparatus according to Embodiment 3 of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Example 1

A first embodiment of the present invention provides a data transmission method, and the process thereof is as shown in FIG. 5, including: 501: Allocating a first transmission mode for the first part of the wireless block, and allocating a second transmission mode for the second part of the wireless block;

502: Allocating a packet data channel for the first partial burst and the second partial burst;

503: transmit the first partial burst and the second partial burst on the allocated data channel in the first transmission manner and the second transmission manner, respectively.

In the embodiment of the present invention, by using different transmission modes in one radio block, different time slots are transmitted through different transmission modes in one radio block, and the advantages of different transmission modes are fully utilized, and the multiplexing efficiency of the packet channel is improved. .

It should be noted that, in this embodiment, the execution entity may be a base station. The first transmission mode may be a pre-coded enhanced general packet radio service second-stage Precoded EGPRS2 transmission mode, and the second transmission mode may be an enhanced general packet radio service second P-segment EGPRS2 transmission mode. The first transmission mode and the second transmission mode may also be other transmission modes, such as GPRS and EGPRS. Example 2

The second embodiment of the present invention is a method for mixing the Precoded EGPRS2 transmission mode and the EGPRS2 transmission mode in a radio block as an example. The flow of the method is as shown in FIG.

601: Precoded the EGPRS2 mode for the first part of the radio block and transmits it through the first packet data channel.

Specifically, different transmission modes are mixed in the radio block, and different time slots in the radio block are transmitted through different transmission modes, which can fully utilize the advantages of the two different transmission modes, and improve the multiplexing efficiency of the packet channel. In this embodiment, the EGPRS2 and Precoded EGPRS2 transmission modes are mixed and used as an example.

Further, since Precoded EGPRS2 introduces a new transmission mode, only the terminal supporting Precoded EGPRS2 can solve the radio block transmitted by Precoded EGPRS2. Therefore, in order to improve the multiplexing efficiency of the channel, it is mixed in one radio block. The EGPRS2 and Precoded EGPRS2 transmission modes are transmitted, so that the base station can flexibly allocate different transmission modes according to different terminals. Since the Precoded EGPRS2 transmission mode does not change the number of symbols and the number of valid information bits carried by each modulation and coding mode of the EGPRS2 transmission mode, then a downlink radio block (after determining the modulation and coding mode) passes the Precoded EGPRS2 mode or EGPRS2 transmission, the amount of information carried is the same. For example, if the information bit carried by the radio block of the DAS-5 modulation coding mode in the EGPRS2 mode is X, then the information bit carried by one DAS-5 radio block in the Precoded EGPRS2 mode is still x. Therefore, some of the four bursts in the same radio block can be transmitted through the Precoded EGPRS2 mode, and other bursts are transmitted through the EGPRS2 mode. The purpose of this is to allow terminals that do not support the Precoded EGPRS2 mode to deport from the bursts transmitted by the EGPRS2 mode to the information of these terminals (such as USF). At the same time, since the terminal supporting the Precoded EGPRS2 mode can unlock the burst transmitted by the Precoded EGPRS2 mode and can also solve the burst transmitted by the EGPRS2 mode, the information in the wireless block using the hybrid transmission mode can be unlocked. .

The specific way can be:

In the configuration of the TIUSF, the first part of the burst of two consecutive RTTI radio blocks in one ΒΤΉ period is sequentially transmitted on the first packet data channel using the Precoded EGPRS2 method. The four bursts carry a USF, and the USF can only be solved by a terminal that supports Precoded EGPRS2.

602: EGPRS2 mode is allocated for the second part of the radio block burst and transmitted through the second packet data channel.

Specifically, the second partial burst of two consecutive RTTI radio blocks in one chirp period is sequentially transmitted on the second packet data channel using the EGPRS2 method. These four bursts of terminals are solved. It should be noted that 602 can be performed simultaneously with 601, or before or after 601, and the execution order is not limited.

For example, as shown in FIG. 7, in the BTTI USF configuration, the bits generated by a USF after channel coding and interleaving are respectively mapped to the first packet data channel (the third time slot, hereinafter referred to as PDCH2). On consecutive bursts, the transmission is performed by Precoded EGPRS2. For the sake of understanding, the USF (referred to as USF2) transmitted through PDCH2 is mapped to the first burst. The part that is mapped to the first burst is called USF2_0, and so on. The parts that are mapped to the remaining three bursts are USF2_1, USF2_2, and USF2_3. .

The bits generated by another USF after channel coding and interleaving are respectively mapped on four consecutive bursts of the second packet data channel (fourth slot, hereinafter referred to as PDCH3), and transmitted by the EGPRS2 method. For ease of understanding, the USF (referred to as USF3) transmitted through PDCH3 is mapped to the first burst and is called USF3_0, and so on. The remaining three bursts are USF3_1, USF3_2, and USF3_3. In this case, the USF3 is solved.

Further, the solution in this embodiment can be extended to the general situation, that is, the base station selects a part of the bursts to use the Precoded EGPRS2 mode for transmission in any one of the radio blocks (whether the RTTI radio block or the BTTI radio block) according to the change of the wireless environment. Other bursts use the EGPRS2 method for transmission.

In addition, RTTI radio blocks can also be transmitted by mixing EGPRS2 and Precoded EGPRS2 transmission modes under the configuration of RTTI USF or under the configuration of RT. In both cases, the hybrid transmission does not bring the benefit of improving the efficiency of the uplink packet channel multiplexing, but it can better adapt to the changes in the wireless environment in the network, and can improve the demodulation performance of the radio block.

603: The receiver terminal receives and resolves the information that is sent to itself.

Specifically, the downlink radio block is divided into two parts, one part is USF, and the other part is data other than USF. Multiple terminals may all receive the same downlink radio block, but at most two terminals will consider that the radio block contains information related to itself, and other terminals will drop the wireless block. One of the two terminals is the receiver of the data part, which judges that the data part of the radio block is sent to itself according to the TFI of the radio block header. The other is the receiver of the USF, which determines whether the USF is equal to the USF allocated to itself according to the USF of the radio block header. If it is equal, it knows that the next uplink radio block is allocated to itself, and it can be in the next uplink radio block. Send information on. The information of the two parts is sent in steps 601 and 602, respectively.

Further, a complete piece of information is transmitted by four bursts, each of which has both a fragment of the data portion and a fragment of the USF portion. Both the data part and the USF can only be solved after receiving all four bursts. After receiving the radio block, the receiver judges the TFI or USF of the radio block header, and the information sent to itself is further processed. If not, the radio block is discarded.

The embodiment of the invention improves the multiplexing efficiency of the packet channel by mixing the two transmission modes of EGPRS2 and Precoded EGPRS2 in one radio block, and achieves the chain that fully utilizes the Precoded EGPRS2 transmission mode in one radio block. The USG scheduling in the burst of the channel gain, which can be transmitted by the EGPRS2 method, does not support the effect of the Precoded EGPRS2 terminal. Example 3

Referring to FIG. 8, an embodiment of the present invention provides a data transmission apparatus, including:

The first allocation module 1 is configured to allocate a first transmission mode for the first partial burst of the wireless block, and allocate a second transmission mode for the second partial burst of the wireless block.

Specifically, different transmission modes are mixed in the radio block, and different time slots in the radio block are transmitted through different transmission modes, which can fully utilize the advantages of the two different transmission modes, and improve the multiplexing efficiency of the packet channel.

The first allocation module 1 is specifically configured to allocate a pre-coded enhanced general packet radio service second-stage Precoded EGPRS2 transmission mode for the first part of the radio block, and allocate a second part of the radio block to the second part. Enhanced second-stage EGPRS2 transmission mode for general packet radio services. The second allocation module 2 is configured to allocate a packet data channel for the first partial burst and the second partial burst.

Specifically, different packet data channels are allocated for the first partial burst and the second partial burst. After the first allocation module 1 allocates a transmission mode to the bursts of different time slot numbers of the radio block, the second allocation module 2 allocates a packet data channel to the burst in which the transmission mode is allocated. The transmitting module 3 is configured to transmit the first partial burst and the second partial burst on the allocated data channel in the first transmission manner and the second transmission manner, respectively.

Specifically, the device may be a base station. The burst in the radio block after the packet data channel is allocated by the second allocation module 2 is transmitted to the terminal by the transmission module 3 in the transmission mode assigned by the first distribution module 1.

In the embodiment of the present invention, by using different transmission modes in one radio block, different time slots are transmitted through different transmission modes in one radio block, and the advantages of different transmission modes are fully utilized, and the multiplexing efficiency of the packet channel is improved. . The apparatus of the third embodiment of the present invention is the same as the method concept and principle of the foregoing first and second embodiments, and therefore the same parts in the third embodiment are no longer the same as in the first and second embodiments. Narration.

The integrated unit according to the embodiment of the present invention is implemented in the form of a software functional unit and Separate products can also be stored on a computer readable storage medium when sold or used. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, website, or network device, etc.) performs all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, and the program code can be stored. Medium.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the scope of the present invention. Inside.

Claims

Rights request

A data transmission method, the method comprising:

The method according to claim 1, wherein the allocating the packet data channel for the first partial burst and the second partial burst includes:

Different packet data channels are allocated for the first partial burst and the second partial burst.

The method according to claim 1, wherein the first transmission mode is a pre-coded enhanced general packet radio service second-stage Precoded EGPRS2 transmission mode; and the second transmission mode is an enhanced general packet. The second phase of the wireless service EGPRS2 transmission mode.

4. A data transmission device, the device comprising:

a first allocation module, configured to allocate a first transmission mode for the first part of the wireless block, and a second transmission mode for the second part of the wireless block;

a second allocation module, configured to allocate a packet data channel for the first partial burst and the second partial burst;

5. The device according to claim 4, wherein the second distribution module is specifically configured to:

The device according to claim 4, wherein the first allocation module is specifically configured to allocate a precoded enhanced general packet radio service for a first partial burst of a radio block. The second stage Precoded EGPRS ² transmission mode allocates an enhanced second-stage EGPRS2 transmission mode of the general packet radio service for the second part of the radio block.

7. Apparatus according to any of claims 4-6, wherein said apparatus is a base station.