WO2017092517A1

WO2017092517A1 - Data transmission method and device

Info

Publication number: WO2017092517A1
Application number: PCT/CN2016/103196
Authority: WO
Inventors: 彭佛才; 刘文豪; 弓宇宏; 张芳; 苟伟; 韩翠红; 毕峰; 陈艺戬; 夏树强
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-12-01
Filing date: 2016-10-25
Publication date: 2017-06-08
Also published as: CN106817724A

Abstract

Disclosed in the present invention are a data transmission method and device. The method comprises: a wireless receiving and transmitting apparatus transmits subframe structure data having a training preamble; and the wireless receiving and transmitting apparatus performs at least one of the following processing steps via the subframe structure data having the training preamble: acquiring CSI, determining the best transmission beam and the best reception beam, and performing data transmission. The data transmission method and device disclosed in the present invention can reduce a time delay between calculation and use of the CSI, and provide a specific solution as to how to determine the best transmission beam and/or the best reception beam.

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

In high frequency communications (eg, frequencies above 5 GHz or 5 GHz), the channel changes faster. The current Long Term Evolution (LTE) mobile communication system measures a minimum time delay of 5 ms (actually it may take longer). This requires a corresponding mechanism to use the measured channel state information (CSI, Channel State Information) as soon as possible.

Moreover, in high-frequency communication, there are many antennas and more beams. It takes a while for the entire system to know the best transmit beam and the best receive beam. However, the method of determining the best transmit beam and the best receive beam has not yet been clearly determined.

Summary of the invention

In order to solve the above technical problem, the present invention provides a data transmission method and apparatus capable of reducing a time delay of CSI measurement to use and clarifying how to determine an optimal transmission beam and/or an optimal reception beam.

In order to achieve the above technical object, the present invention provides a data transmission method, including: a wireless transceiver device transmits subframe structure data having a training header; and the wireless transceiver device performs at least one of the following by using the subframe structure data with the training header Processing: Obtain CSI, determine the best transmit beam, determine the best receive beam, and perform data transmission.

The present invention further provides a data transmission apparatus, which is applied to a wireless transceiver device, comprising: a transmission module configured to transmit subframe structure data having a training header; and a processing module configured to pass the subframe structure data having the training header, Perform at least one of the following: obtaining CSI, determining the best transmit beam, determining the best receive beam, and performing data transmission.

In the present invention, the wireless transceiver device transmits subframe structure data having a training header; the wireless transceiver device performs at least one of the following processes by using the subframe structure data with the training header: obtaining CSI, determining an optimal transmit beam, and determining Optimal reception of beams and data transmission. Compared to the prior art, the present invention reduces the time delay for CSI measurement to use and clarifies how to determine the best transmit beam and the best receive beam.

DRAWINGS

FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention;

2 is a schematic diagram 1 of a frame and/or subframe structure according to an embodiment of the present invention;

FIG. 3 is a second schematic diagram of a frame and/or subframe structure according to an embodiment of the present disclosure;

4 is a schematic diagram 3 of a frame and/or subframe structure according to an embodiment of the present invention;

FIG. 5 is a schematic diagram 4 of a frame and/or subframe structure according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram 5 of a frame and/or subframe structure according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram 6 of a frame and/or subframe structure according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram 7 of a frame and/or subframe structure according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram 8 of a frame and/or subframe structure according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram 9 of a frame and/or subframe structure according to an embodiment of the present invention;

11 is a schematic diagram 10 of a frame and/or subframe structure according to an embodiment of the present invention;

FIG. 12 is a schematic diagram 11 of a frame and/or subframe structure according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of a frame and/or subframe structure according to an embodiment of the present invention;

FIG. 14 is a schematic diagram 13 of a frame and/or subframe structure according to an embodiment of the present disclosure;

FIG. 15 is a schematic diagram of a data transmission apparatus according to an embodiment of the present invention.

detailed description

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

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

Step 101: The wireless transceiver device transmits subframe structure data with a training header.

Step 102: The wireless transceiver device performs at least one of the following processes by using the subframe structure data with the training header: obtaining channel state information (CSI), determining an optimal transmit beam, determining an optimal receive beam, and performing data transmission.

Optionally, the wireless transceiver device is a base station or a user equipment (UE, User Equipment).

Further, the training header includes at least one of the following: a preamble, a sounding reference signal (SRS). In particular, a training head refers to a channel or signal placed in front of a subframe or frame. The purpose of using the training head is to perform channel training to obtain channel conditions.

Further, each transmit beam uses a different Preamble, and each receive beam uses a different Preamble.

Further, the Preamble includes a downlink Preamble and an uplink Preamble.

The downlink Preamble is a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS). Each transmit beam uses a different PSS and/or SSS, with each receive beam using a different PSS and/or SSS.

Further, step 101 includes:

The wireless transceiver device transmits subframe structure data having a training header; and/or,

The wireless transceiver device receives subframe structure data having a training header.

Optionally, when the wireless transceiver device is a base station, step 101 includes: the base station is transmitting a control channel and/or The downstream Preamble is transmitted before the data channel.

The minimum duration of the downlink Preamble transmitted by the base station is 4 microseconds, 2 microseconds or 1 microsecond. The downlink Preamble transmitted by the base station is a PSS and/or an SSS for indicating the start of control channel and/or data channel transmission. Each transmit beam uses a different PSS and/or SSS, enabling the UE to distinguish between different transmit beams based on PSS and/or SSS.

Optionally, when the wireless transceiver device is a base station, step 101 includes: the base station receiving the uplink SRS and/or the uplink Preamble before transmitting the control channel and/or the data channel.

Optionally, when the wireless transceiver device is a base station, step 101 includes: before transmitting the control channel and/or the data channel, the base station first receives the uplink SRS and/or the uplink Preamble transmitted by the UE, and then transmits the downlink Preamble.

Optionally, when the wireless transceiver device is a base station, step 101 includes: before transmitting the control channel and/or the data channel, the base station first transmits a downlink Preamble, and then receives an uplink SRS and/or an uplink Preamble transmitted by the UE.

Optionally, when the wireless transceiver device is a base station, step 101 includes: before the base station transmits the control channel and/or the data channel, the base station first transmits the downlink Preamble, and after receiving the guard interval (GP) period, receiving the UE. Upstream SRS and/or Upstream Preamble.

Further, step 102 includes: the base station obtaining the downlink channel condition and/or the base station optimal transmit beam according to the feedback after the UE receives the downlink Preamble.

Further, step 102 includes: the base station obtains at least one of the following by using an uplink SRS and/or an uplink Preamble: an uplink channel condition, a base station optimal receive beam, a downlink channel condition, and a base station optimal transmit beam.

Optionally, when the wireless transceiver device is a base station, step 101 includes: after the base station transmits the completed control channel and/or the data channel, after receiving the GP duration, receiving beam information feedback sent by the UE and/or for the control channel and/or Or the acknowledgment information ACK and/or NACK of the data channel.

Optionally, when the wireless transceiver device is a base station, step 101 includes: after the base station transmits the completion control channel and/or the data channel, transmitting the downlink reference signal.

Optionally, when the wireless transceiver device is a base station, step 101 includes: after the base station transmits the completion control channel and/or the data channel, transmitting the downlink reference signal, and then receiving the acknowledgement information ACK of the UE for the control channel and/or the data channel. / or NACK.

Further, step 102 includes: the base station obtaining the downlink channel condition and/or the base station optimal transmit beam according to the feedback after the UE receives the downlink reference signal.

Optionally, the base station transmits the control channel and the data channel by using time division multiplexing or frequency division multiplexing.

Optionally, when the wireless transceiver device is a UE, step 101 includes: after the base station transmits a guard interval GP duration after completing the control channel and/or the data channel, the UE transmits acknowledgement information for the control channel and/or the data channel. ACK and / or NACK.

Further, the UE transmits acknowledgement information ACK and/or for the control channel and/or data channel The NACK includes: the UE transmits the acknowledgement information ACK and/or NACK according to the frequency resource information of the control channel and/or the data channel.

Further, the UE transmits the acknowledgement information ACK and/or the NACK according to the frequency resource information of the control channel and/or the data channel, including: the UE transmits the acknowledgement information ACK and/or the NACK according to the resource information of the control channel.

Further, the GP duration is 0 and the acknowledgment information ACK and/or NACK is acknowledgment information for the previous at least one subframe data.

Further, the control channel is composed of at least one symbol. The data channel consists of at least one symbol. The acknowledgement information ACK and/or NACK consists of at least one symbol.

Optionally, the GP duration is a duration of P symbols, where P is an integer greater than or equal to 1.

Optionally, the GP duration is zero. That is, there is no GP.

Optionally, the GP duration is a duration of G symbols, where G is greater than 0 and is a non-integer. For example, the GP duration is 0.357 symbol durations or 9/7 symbol durations.

Optionally, the GP duration is M+k*N units W, where M, k, and N are integers, and W is 1 microsecond.

Optionally, the GP duration is 16 microseconds. That is, M = 16, k = 0, N = 9, and W = 1 microsecond.

Optionally, the GP duration is 25 microseconds. That is, M = 16, k = 1, N = 9, and W = 1 microsecond.

Optionally, the GP duration is Q times the τ, wherein

Or, τ=2·d·tg(θ/2)/c,

Where d is the target coverage distance (unit: meter), θ is the beam width (angle), c is the speed of light (unit: meters per second), and Q is a number from 1 to 200 (including integers and non-integer).

Optionally, Q is 100.

Further, one radio frame includes at least one subframe structure.

The invention is illustrated by the following specific examples.

Embodiment 1

In the present embodiment, FIG. 2, FIG. 3 and FIG. 4 are taken as an example for explanation.

The base station may first transmit a downlink Preamble (as shown in FIG. 3) before transmitting the control channel/data channel. Each beam uses a different Preamble. After receiving the downlink Preamble, the UE feeds back the downlink channel condition and the optimal transmit beam of the base station to the base station. The base station thus obtains the downlink channel condition and the optimal transmit beam of the base station.

After the base station transmits the GP duration after completing the control channel/data channel, the UE transmits acknowledgement information (ACK/NACK) for the above control channel/data channel.

The downlink Preamble transmitted by the base station may be PSS/SSS (as shown in FIG. 4). Each beam uses a different PSS/SSS. The UE distinguishes different beams according to PSS/SSS.

The downlink Preamble transmitted by the base station can use a large subcarrier spacing (eg, 600 kHz, 960 kHz, 1920 kHz; using Orthogonal Frequency Division Multiplexing (OFDM)) at 4 microseconds or 2 microseconds or 1 microsecond. The internal launch is completed.

Embodiment 2

In the present embodiment, FIG. 2, FIG. 5, FIG. 6, and FIG. 7 are taken as an example for explanation.

Before transmitting the control channel/data channel, the base station may first receive the uplink SRS/Preamble (as shown in FIG. 5 and FIG. 6), or first receive the uplink SRS/Preamble and then transmit the downlink Preamble (as shown in FIG. 7). The base station obtains an uplink channel condition, an optimal receiving beam of the base station, a downlink channel condition, and an optimal transmit beam of the base station by using the uplink SRS/Preamble.

After receiving the downlink Preamble, the UE feeds back the downlink channel condition and the optimal transmit beam of the base station to the base station. The base station thus obtains the downlink channel condition and the optimal transmit beam of the base station.

The downlink Preamble transmitted by the base station may be PSS/SSS. Each beam uses a different PSS/SSS. The UE distinguishes different beams according to PSS/SSS.

Embodiment 3

In the present embodiment, FIG. 8 is taken as an example for explanation.

The base station may first transmit the downlink Preamble before the UE transmits the uplink Preamble. Each beam uses a different Preamble. After receiving the downlink Preamble, the UE feeds back the downlink channel condition and the optimal transmit beam of the base station to the base station. The base station thus obtains the downlink channel condition and the optimal transmit beam of the base station.

After the UE transmits the downlink Preamble, the UE then transmits the uplink Preamble.

The base station may receive the uplink SRS/Preamble before transmitting the control channel/data channel. The base station obtains an uplink channel condition, an optimal receiving beam of the base station, a downlink channel condition, and an optimal transmit beam of the base station by using the uplink SRS/Preamble.

Embodiment 4

In the present embodiment, FIG. 9 is taken as an example for explanation.

After the UE transmits the uplink Preamble after the base station transmits the downlink Preamble, the UE then transmits the uplink Preamble.

After the base station transmits the GP2 duration after completing the control channel/data channel, the UE transmits the above control Confirmation information (ACK/NACK) of the channel/data channel.

Embodiment 5

In the present embodiment, FIG. 10 is taken as an example for explanation.

The base station may transmit a downlink Preamble (training head) before transmitting the control channel/data channel. Each beam uses a different Preamble. After receiving the downlink Preamble, the UE feeds back the downlink channel condition and the optimal transmit beam of the base station to the base station. The base station thus obtains the downlink channel condition and the optimal transmit beam of the base station.

The base station then transmits a control channel/data channel.

Then, the base station transmits a downlink reference signal.

Then, the UE receives the downlink reference signal. Thereafter, the UE feeds back the downlink channel condition and the base station optimal transmit beam to the base station. The base station thus obtains the downlink channel condition and the optimal transmit beam of the base station.

Embodiment 6

In the present embodiment, FIG. 11 is taken as an example for explanation.

The base station then transmits a control channel/data channel.

Then, the base station transmits a downlink reference signal.

Then, the UE transmits acknowledgement information (ACK/NACK) for the above control channel/data channel.

Example 7

In the present embodiment, FIG. 12, FIG. 13, and FIG. 14 are taken as an example for explanation.

The base station may transmit the downlink Preamble before transmitting the control channel/data channel. Each beam uses a different Preamble. After receiving the downlink Preamble, the UE feeds back the downlink channel condition and the optimal transmit beam of the base station to the base station. The base station thus obtains the downlink channel condition and the optimal transmit beam of the base station.

As shown in FIG. 12, after the base station transmits the GP duration after completing the control channel/data channel, the UE transmits acknowledgement information (ACK/NACK) and beam information feedback for the above control channel/data channel (eg, base station optimal transmit beam). ).

As shown in FIG. 13, after the base station transmits the GP duration after completing the control channel/data channel, the UE transmits beam information feedback (eg, the base station optimal transmit beam).

As shown in FIG. 14, after the base station transmits the GP duration after completing the control channel/data channel, the UE transmits acknowledgement information (ACK/NACK) for the above control channel/data channel, and then the UE retransmits beam information feedback (eg, base station). Optimal transmit beam).

In addition, the embodiment of the present invention further provides a data transmission apparatus, which is applied to a wireless transceiver device, and includes: a transmission module, configured to transmit subframe structure data with a training header; and a processing module 101, configured to pass the training head The subframe structure data performs at least one of the following processes: obtaining CSI, determining an optimal transmit beam, determining an optimal receive beam, and performing data transmission.

Further, the wireless transceiver device is a base station or a UE.

Further, the transmission module includes: a transmitting module 102 and a receiving module 103; a transmitting module 102, configured to transmit subframe structure data with a training header; and a receiving module 103, configured to receive subframe structure data with a training header.

As shown in FIG. 15, a data transmission apparatus according to an embodiment of the present invention is applied to a wireless transceiver device, and includes a transmitting module 102, a receiving module 103, and a processing module 101.

In a practical application, the transmitting module 102 is, for example, a communication component having an information transmitting capability such as a transmitter, and the receiving module 103 is, for example, a communication component having a receiving capability such as a receiver, and the processing module 101 is, for example, a controller or the like having information processing capability. element. However, the present invention is not limited thereto.

In addition, the specific processing flow of the device is the same as that described above, and thus will not be described herein.

The above modules of the transmission module, the processing module 101, and the submodules thereof may include hardware components, software modules, or a combination of hardware and software. The same module may be implemented by the same hardware/software or by a combination of different hardware/software. The above modules may all be located in the same hardware structure, for example, in the same processor; or, the above modules are respectively located in multiple hardware structures, and may interact through a communication connection.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. The present invention is not limited by the above-described embodiments, and the above-described embodiments and the description are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention. And modifications are intended to fall within the scope of the invention as claimed.

Industrial applicability

The invention is applicable to the field of communications, to reduce the time delay from CSI measurement to use, and to determine how to determine the best transmit beam and the best receive beam.

Claims

A data transmission method includes:

The wireless transceiver device transmits the subframe structure data with the training header;

The wireless transceiver device performs at least one of the following processes by using the subframe structure data with the training header: obtaining channel state information CSI, determining an optimal transmit beam, determining an optimal receive beam, and performing data transmission.
The method of claim 1 wherein the wireless transceiver is a base station or user equipment UE.
The method of claim 1, wherein the training head comprises at least one of: a preamble, a sounding reference signal SRS.
The method of claim 3 wherein each transmit beam uses a different Preamble and each receive beam uses a different Preamble.
The method of claim 3 wherein said Preamble comprises a downstream Preamble and an upstream Preamble.
The method of claim 5 wherein said downstream Preamble is a primary synchronization signal PSS and/or a secondary synchronization signal SSS.
The method of claim 6 wherein each transmit beam uses a different PSS and/or SSS, each receive beam using a different PSS and/or SSS.
The method of claim 1 wherein said wireless transceiver device transmits subframe structure data having a training header, comprising:

The wireless transceiver device transmits subframe structure data having a training header; and/or,

The wireless transceiver device receives subframe structure data having a training header.
The method of claim 1, wherein when the wireless transceiver device is a base station, the wireless transceiver device transmits subframe structure data having a training header, comprising: the base station transmitting a control channel and/or a data channel Previously, the downlink Preamble was launched.
The method of claim 9, wherein the base station transmits a downlink Preamble with a minimum duration of 4 microseconds, 2 microseconds or 1 microsecond.
The method of claim 9, wherein the downlink Preamble transmitted by the base station is a PSS and/or an SSS, set to indicate the start of control channel and/or data channel transmission.
The method of claim 11 wherein each transmit beam uses a different PSS and/or SSS such that the UE can distinguish between different transmit beams based on the PSS and/or SSS.
The method of claim 1, wherein when the wireless transceiver device is a base station, the wireless transceiver device transmits subframe structure data having a training header, including:

Receiving, by the base station, an uplink SRS and/or an uplink Preamble before transmitting a control channel and/or a data channel; or

Before the base station transmits the control channel and/or the data channel, the base station first receives the uplink SRS and/or the uplink Preamble transmitted by the UE, and then transmits the downlink Preamble; or

Before transmitting the control channel and/or the data channel, the base station first transmits a downlink Preamble, and then receives an uplink SRS and/or an uplink Preamble transmitted by the UE; or

Before the base station transmits the control channel and/or the data channel, the base station first transmits the downlink Preamble, and after receiving the guard interval GP duration, receives the uplink SRS and/or the uplink Preamble transmitted by the UE.
The method according to claim 13, wherein said wireless transceiver device performs at least one of: obtaining channel state information CSI, determining an optimal transmit beam, determining the best through said subframe structure data having a training header; Receiving beams and transmitting data, including:

The base station obtains a downlink channel condition and/or an optimal transmit beam of the base station according to the feedback after the UE receives the downlink Preamble.
The method according to claim 13, wherein said wireless transceiver device performs at least one of: obtaining channel state information CSI, determining an optimal transmit beam, determining the best through said subframe structure data having a training header; Receiving beams and transmitting data, including:

The base station obtains at least one of the following by the uplink SRS and/or the uplink Preamble: an uplink channel condition, a base station optimal receive beam, a downlink channel condition, and a base station optimal transmit beam.
The method of claim 1, wherein when the wireless transceiver device is a base station, the wireless transceiver device transmits subframe structure data having a training header, comprising: the base station transmitting a completion control channel and/or a data channel Thereafter, after the guard interval GP duration, the beam information feedback transmitted by the UE and/or the acknowledgement information ACK and/or NACK for the control channel and/or the data channel are received.
The method of claim 1, wherein when the wireless transceiver device is a base station, the wireless transceiver device transmits subframe structure data having a training header, including:

After the base station transmits the completion control channel and/or the data channel, transmitting the downlink reference signal; or

After transmitting the completion control channel and/or the data channel, the base station transmits a downlink reference signal, and then receives acknowledgement information ACK and/or NACK transmitted by the UE for the control channel and/or the data channel.
The method according to claim 17, wherein said wireless transceiver device performs at least one of: obtaining channel state information CSI, determining an optimal transmit beam, determining the best through said subframe structure data having a training header Receiving beams and transmitting data, including:

The base station obtains a downlink channel condition and/or an optimal transmit beam of the base station according to the feedback after the UE receives the downlink reference signal.
The method of claim 9, 13, 16 or 17, wherein said base station transmits a control channel and a data channel in a time division multiplex or a frequency division multiplex.
The method of claim 1, wherein when the wireless transceiver device is a UE, the wireless transceiver device transmits subframe structure data having a training header, including:

After the base station transmits a guard interval GP duration after completing the control channel and/or the data channel, the UE transmits acknowledgement information ACK and/or NACK for the control channel and/or data channel.
The method of claim 20 wherein said UE transmits for said control channel and/or number According to the acknowledgement information ACK and/or NACK of the channel, the UE transmits the acknowledgement information ACK and/or NACK according to the frequency resource information of the control channel and/or the data channel.
The method according to claim 21, wherein the UE transmits the acknowledgement information ACK and/or the NACK according to the frequency resource information of the control channel and/or the data channel, including: the UE transmitting the acknowledgement according to the resource information of the control channel. Information ACK and / or NACK.
The method of claim 20, wherein the GP duration is 0 and the acknowledgment information ACK and/or NACK is acknowledgment information for the previous at least one subframe data.
The method of claim 20 wherein said control channel or data channel consists of at least one symbol.
The method of claim 20, wherein the acknowledgment information ACK and/or NACK consists of at least one symbol.
The method of claim 13, 16 or 20, wherein the GP duration is a duration of P symbols, wherein P is an integer greater than or equal to 1.
The method of claim 13 or 16, wherein the GP duration is zero.
The method of claim 13, 16 or 20, wherein the GP duration is a duration of G symbols, wherein G is greater than 0 and is a non-integer.
The method of claim 13, 16 or 20, wherein the GP duration is M + k * N units W, wherein M, k, N are integers and W is 1 microsecond.
The method of claim 29 wherein said GP duration is 16 microseconds or 25 microseconds.
The method according to claim 13, 16 or 20, wherein said GP duration is Q times τ, wherein
Or, τ=2·d·tg(θ/2)/c,

Where d is the target coverage distance, θ is the beam width, c is the speed of light, and Q is a number from 1 to 200.
The method of claim 31 wherein Q is 100.
A data transmission device is applied to a wireless transceiver device, including:

a transmission module configured to transmit subframe structure data having a training header;

The processing module is configured to perform at least one of the following processes by using the subframe structure data with the training header: obtaining channel state information CSI, determining an optimal transmit beam, determining an optimal receive beam, and performing data transmission.
The apparatus of claim 33, wherein the wireless transceiver is a base station or a UE.
The apparatus of claim 33, wherein the transmission module comprises: a transmitting module configured to transmit subframe structure data having a training header, and a receiving module configured to receive the training header Subframe structure data.