CN108370560B

CN108370560B - Data transmission method, device, terminal and base station

Info

Publication number: CN108370560B
Application number: CN201580085303.0A
Authority: CN
Inventors: 赵雅琪; 赵悦莹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-12-17
Filing date: 2015-12-17
Publication date: 2020-03-10
Anticipated expiration: 2035-12-17
Also published as: WO2017101072A1; CN108370560A

Abstract

The application provides a data transmission method and device. The method comprises the following steps: a base station receives channel state information reported by a terminal, wherein the channel state information is used for indicating a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; the base station determines a part to be sent from the base station to the terminal in downlink data according to the good-bad relation between the first downlink channel quality and the second downlink channel quality; and the base station sends the part to be sent to the terminal. By adopting the method and the device provided by the partial application, the possibility that the base station encounters deep attenuation of the downlink channel in the process of sending the system bit and the check bit of the downlink data can be reduced, so that the robustness in the process of transmitting the downlink data can be improved.

Description

Data transmission method, device, terminal and base station

Technical Field

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

Background

To realize the fifth generation (the 5)^thgeneration, 5G) communication system, the architecture of the first stage of 5G development may use Long Term Evolution (LTE) Technology as a main Radio Access Technology (RAT), and 5G as an auxiliary RAT. When LTE is used as the primary RAT and 5G is used as the secondary RAT, a base station (hereinafter referred to as an LTE base station) using the LTE RAT may be used as a macro base station, and a base station (hereinafter referred to as a 5G base station) using the 5G RAT may be deployed in a coverage area of the macro base station as a micro base station, so as to jointly schedule the 5G base station and the LTE base station, thereby implementing transmission of control plane data through the LTE base station and transmission of user plane data through the 5G base station.

In the prior art, when a base station transmits downlink data to a terminal, the base station first needs to encode the downlink data to be transmitted to generate bit stream information composed of a system bit and a check bit, and then sequentially transmits the system bit and the check bit in the bit stream through a downlink channel. However, since the working frequency band of the 5G RAT is high and the stability of the beam of the signal is poor, deep fading easily occurs in the downlink channel during the data transmission between the 5G base station and the terminal, which results in poor robustness of downlink data transmission.

Disclosure of Invention

The embodiment of the invention provides a data transmission method, a data transmission device, a terminal and a base station, and aims to solve the problem that the existing data transmission technology is easy to cause poor robustness of downlink data transmission.

In a first aspect, an embodiment of the present invention provides a data transmission method, where the method includes: a base station receives channel state information reported by a terminal, wherein the channel state information is used for indicating a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; the base station determines a part to be sent in downlink data according to the quality relation between the first downlink channel quality and the second downlink channel quality; and the base station sends the part to be sent to the terminal.

By adopting the data transmission method, the downlink data can be jointly transmitted through a plurality of downlink channels of a plurality of base stations, so that the condition of channel deep attenuation in the process of transmitting the system bit and the check bit is avoided, and the robustness of data transmission of the downlink data can be improved.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by the base station, a part to be transmitted in downlink data, which needs to be transmitted to the terminal by the base station, according to a good-bad relationship between the first downlink channel quality and the second downlink channel quality by the base station includes: and when the quality of the first downlink channel is inferior to that of a second downlink channel, the base station takes the check bit of the downlink data as the part to be transmitted.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the determining, by the base station, a part to be transmitted in downlink data, which needs to be transmitted to the terminal by the base station, according to a good-bad relationship between the first downlink channel quality and the second downlink channel quality by the base station includes: and when the quality of the first downlink channel is inferior to that of the second downlink channel and the load of the other base station is higher than a first threshold value, the base station takes the check bit of the downlink data as the part to be transmitted.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the check bits of the downlink data include a first check bit and a second check bit; the base station determining, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data includes: and when the first downlink channel quality is inferior to the second downlink channel quality, the base station takes the first check bit as the part to be sent.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the check bits of the downlink data include a first check bit and a second check bit; the base station determining, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data includes: and when the first downlink channel quality is inferior to the second downlink channel quality and the load of the other base station is lower than a first threshold value, the base station takes the first check bit of the downlink data as the part to be transmitted.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the determining, by the base station according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data includes: and when the quality of the first downlink channel is better than that of a second downlink channel, the base station takes the system bit of the downlink data as the part to be sent.

With reference to the first aspect, in a sixth possible implementation manner of the first aspect, the determining, by the base station according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data includes: and when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold value, the base station takes the system bit of the downlink data as the part to be sent.

With reference to the fifth or sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the check bits of the downlink data include a first check bit and a second check bit; the base station determining, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data includes: and when the quality of the first downlink channel is better than that of a second downlink channel, the base station takes the system bit of the downlink data and the first check bit as the part to be transmitted.

With reference to the fifth or sixth possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the check bits of the downlink data include a first check bit and a second check bit; the base station determining, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data includes: and when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold value, the base station takes the system bit and the first check bit of the downlink data as the part to be sent.

In a second aspect, an embodiment of the present invention provides another data transmission method, where the method includes: a terminal reports channel state information to a first base station and a second base station respectively, wherein the channel state information is used for indicating the first downlink channel quality of a downlink channel between the first base station and the terminal and the second downlink channel quality of the downlink channel between the second base station and the terminal; and the terminal receives downlink data jointly transmitted by the first base station and the second base station, wherein a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and the contents of the first part and the second part are determined by the quality relation between the first downlink channel quality and the second downlink channel quality.

With reference to the second aspect, in a first possible implementation manner of the second aspect, when the quality of the first downlink channel is better than the quality of the second downlink channel, the first part includes systematic bits of the downlink data, and the second part includes parity bits of the downlink data.

With reference to the second aspect, in a second possible implementation manner of the second aspect, when the quality of the first downlink channel is better than the quality of the second downlink channel, the first part includes system bits and first check bits of the downlink data, and the second part includes second check bits of the downlink data.

With reference to the second aspect, in a third possible implementation manner of the second aspect, when the quality of the first downlink channel is inferior to the quality of the second downlink channel, the first part includes check bits of the downlink data, and the second part includes systematic bits of the downlink data.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, when the quality of the first downlink channel is inferior to the quality of the second downlink channel, the first part includes first parity bits of the downlink data, and the second part includes system bits and second parity bits of the downlink data.

With reference to the second aspect or any one of the first to fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, before the reporting, by the terminal, channel state information to two base stations respectively, the method further includes: and the terminal determines the first base station and the second base station according to the high-level signaling.

In a third aspect, an embodiment of the present invention provides a data transmission apparatus, where the apparatus includes: a receiving unit, configured to receive channel state information reported by a terminal, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; a determining unit, configured to determine, according to a quality relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted that needs to be transmitted from the base station to the terminal in downlink data; and the sending unit is used for sending the part to be sent to the terminal.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the determining unit is specifically configured to use the downlink data check bit as the part to be transmitted when the first downlink channel quality is inferior to the second downlink channel quality.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the determining unit is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality and the load of the another base station is higher than a first threshold, use the check bit of the downlink data as the part to be transmitted.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the determining unit is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality, use a first parity bit of the downlink data as the part to be transmitted, where the parity bit of the downlink data includes the first parity bit and the second parity bit.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the determining unit is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality and a load of the another base station is lower than a first threshold, use a first parity bit of the downlink data as the part to be transmitted, where the parity bit of the downlink data includes the first parity bit and the second parity bit.

With reference to the third aspect, in a fifth possible implementation manner of the third aspect, the determining unit is specifically configured to use the system bits of the downlink data as the part to be transmitted when the first downlink channel quality is better than the second downlink channel quality.

With reference to the third aspect, in a sixth possible implementation manner of the third aspect, the determining unit is specifically configured to, when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold, use the system bit of the downlink data as the part to be transmitted.

With reference to the fifth or sixth possible implementation manner of the third aspect, the determining unit is specifically configured to, when the quality of the first downlink channel is better than the quality of the second downlink channel, use a system bit and a first parity bit of the downlink data as the part to be transmitted, where the downlink data includes the first parity bit and the second parity bit.

With reference to the fifth or sixth possible implementation manner of the third aspect, the determining unit is specifically configured to, when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold, use a system bit and a first parity bit of the downlink data as the part to be transmitted, where the downlink data includes the first parity bit and the second parity bit.

In a fourth aspect, an embodiment of the present invention provides another data transmission apparatus, where the apparatus includes: a reporting unit, configured to report channel state information to a first base station and a second base station, respectively, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; a receiving unit, configured to receive downlink data jointly transmitted by the first base station and the second base station, where a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and contents included in each of the first part and the second part are determined by a good-bad relationship between the first downlink channel quality and the second downlink channel quality.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, when the quality of the first downlink channel is better than the quality of the second downlink channel, the first part includes system bits of the downlink data, and the second part includes check bits of the downlink data.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, when the quality of the first downlink channel is better than the quality of the second downlink channel, the first part includes system bits and first check bits of the downlink data, and the second part includes second check bits of the downlink data.

With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, when the quality of the first downlink channel is inferior to the quality of the second downlink channel, the first part includes check bits of the downlink data, and the second part includes systematic bits of the downlink data.

With reference to the fourth aspect, in a fourth possible implementation manner of the fourth aspect, when the quality of the first downlink channel is inferior to the quality of the second downlink channel, the first part includes a first parity bit of the downlink data, and the second part includes a system bit and a second parity bit of the downlink data.

With reference to the fourth aspect or any one of the first to fourth possible implementation manners of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the apparatus further includes: a determining unit, configured to determine the first base station and the second base station according to a high-level signaling.

In a fifth aspect, the present invention provides another data transmission method, including: a base station receives channel state information reported by a terminal, wherein the channel state information is used for indicating the channel quality of at least two downlink channels between the base station and the terminal, and the at least two downlink channels use different data transmission resources for downlink data transmission; the base station jointly sends downlink data to the terminal through the at least two downlink channels; wherein the channel quality of the downlink channel used to transmit the downlink data system bits is better than the channel quality of the downlink channel used only to transmit the downlink data check bits.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the sending, by the base station, downlink data to the terminal through the at least two downlink channels in a combined manner includes: the base station sends the system bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels; the base station sends the check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels; wherein the channel quality of the first downlink channel is better than the channel quality of the second downlink channel.

With reference to the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the sending, by the base station, downlink data to the terminal through the at least two downlink channels in a combined manner includes: the base station sends a system bit and a first check bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels; the base station sends a second check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels; wherein the channel quality of the first downlink channel is better than the channel quality of the second downlink channel.

With reference to the fifth aspect or any one of the first or second possible implementation manners of the fifth aspect, in a third possible implementation manner of the fifth aspect, the data transmission resource is an antenna port of the base station or a sub-bandwidth of a system bandwidth of the base station.

In a sixth aspect, an embodiment of the present invention provides another data transmission method, where the method includes: a terminal reports channel state information to a base station, wherein the channel state information is used for indicating the channel quality of at least two downlink channels between the base station and the terminal, and the at least two downlink channels use different data transmission resources for downlink data transmission; and the terminal receives downlink data jointly transmitted by the base station through the at least two downlink channels, wherein the channel quality of the downlink channel for transmitting the downlink data system bits is superior to the channel quality of the downlink channel for transmitting the downlink data check bits only.

In a seventh aspect, the present invention provides, in an implementation, another data transmission apparatus, including: a receiving unit, configured to receive channel state information reported by a terminal, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; a sending unit, configured to send downlink data to the terminal through the at least two downlink channels in a joint manner; wherein the channel quality of the downlink channel for transmitting the downlink data system bits is better than the channel quality of the downlink channel for transmitting the downlink data check bits only.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the sending unit is specifically configured to send the system bits of the downlink data to the terminal through a first downlink channel of the at least two downlink channels, and send the check bits of the downlink data to the terminal through a second downlink channel of the at least two downlink channels, where a channel quality of the first downlink channel is better than a channel quality of the second downlink channel.

With reference to the seventh aspect, in a second possible implementation manner of the seventh aspect, the sending unit is specifically configured to send the system bits and the first check bits of the downlink data to the terminal through a first downlink channel of the at least two downlink channels, and send the second check bits of the downlink data to the terminal through a second downlink channel of the at least two downlink channels, where a channel quality of the first downlink channel is better than a channel quality of the second downlink channel.

With reference to the seventh aspect or any one of the first or second possible implementation manners of the seventh aspect, in a third possible implementation manner of the seventh aspect, the data transmission resource is an antenna port of the base station or a subband of a system bandwidth of the base station.

In an eighth aspect, an embodiment of the present invention provides another data transmission apparatus, where the apparatus includes: a sending unit, configured to report channel state information to a base station, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; a receiving unit, configured to receive downlink data jointly transmitted by the base station through the at least two downlink channels, where a channel quality of a downlink channel used for transmitting the downlink data system bits is better than a channel quality of a downlink channel used for transmitting the downlink data check bits only.

In a ninth aspect, an embodiment of the present invention further provides a base station, where the base station includes: a processor, a memory, and a communication module. The communication module is configured to receive channel state information reported by a terminal, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; the processor is configured to determine, according to a quality relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted that needs to be transmitted from the base station to the terminal in downlink data; the communication module is further configured to send the part to be sent to the terminal.

In a tenth aspect, an embodiment of the present invention further provides another base station, where the base station includes: a processor, a memory, and a communication module. The communication module is configured to receive channel state information reported by a terminal, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; sending downlink data to the terminal through the at least two downlink channels in a combined manner; wherein the channel quality of the downlink channel for transmitting the downlink data system bits is better than the channel quality of the downlink channel for transmitting the downlink data check bits only. And the relative merits between the channel qualities of the at least two downlink channels are determined by the processor.

In an eleventh aspect, an embodiment of the present invention further provides a terminal, where the terminal includes: a processor memory and a communication module. The communication module is configured to report channel state information to the first base station and the second base station, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; and receiving downlink data jointly transmitted by the first base station and the second base station, wherein a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and contents contained in the first part and the second part are determined by a good-bad relation between the first downlink channel quality and the second downlink channel quality. The processor is configured to decode the downlink data.

In a twelfth aspect, an embodiment of the present invention further provides another terminal, where the terminal includes: a processor, a memory, and a communication module. The communication module is configured to report channel state information to a base station, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; and receiving downlink data jointly transmitted by the base station through the at least two downlink channels, wherein the channel quality of the downlink channel for transmitting the downlink data system bits is superior to the channel quality of the downlink channel for transmitting the downlink data check bits only.

In a thirteenth aspect, an embodiment of the present invention further provides a communication system, including: a first base station and a second base station. And the first base station and the second base station are used for jointly sending downlink data to the terminal. Wherein, part of the downlink data may be sent to the terminal by the first base station, and the other part may be sent to the terminal by the second base station.

In a fourteenth aspect, an embodiment of the present invention further provides a computer storage medium, where the computer storage medium may store a program, and when the program is executed, the computer storage medium may include some or all of the steps in the embodiments of the data transmission method provided by the present invention.

By adopting the method, the device, the base station and the terminal provided by the embodiment of the invention, the base station can send different parts of the downlink data to the terminal through different downlink channels, so that the possibility of deep attenuation of the downlink channels when the base station sends the system bit and the check bit of the downlink data can be reduced, and the robustness of the downlink data transmission process can be improved.

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 description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a block diagram of a wireless communication system in which the data transmission method of the present invention can be used;

FIG. 2 is a schematic structural diagram of a Turbo encoder;

FIG. 3 is a flow chart illustrating a data transmission method according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating a data transmission method according to another embodiment of the present invention;

FIG. 5 is a flowchart illustrating a data transmission method according to another embodiment of the present invention;

FIG. 6 is a flowchart illustrating a data transmission method according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another embodiment of a data transmission device according to the present invention;

FIG. 9 is a schematic structural diagram of another embodiment of a data transmission apparatus according to the present invention;

FIG. 10 is a schematic structural diagram of another embodiment of a data transmission device according to the present invention;

FIG. 11 is a block diagram of a base station according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an embodiment of the terminal of the present invention.

Detailed Description

Referring to fig. 1, an architecture of a wireless communication system is shown. In the wireless communication system shown in fig. 1, the data transmission method provided by the embodiment of the present invention may be used to perform downlink data transmission. Wherein the communication system may be a wireless communication system capable of simultaneously using multiple RATs for data transmission.

As shown in fig. 1, there is an intersection between the coverage of the first base station and the coverage of the second base station. The terminal can simultaneously access the first base station and the second base station, thereby simultaneously receiving downlink data sent by the first base station and the second base station. The RATs adopted by the first base station and the second base station may be the same or different. For example, when the first base station is an LTE base station, the second base station may be a 5G base station; or, when the first base station is a 5G high-frequency base station, the second base station is a 5G low-frequency base station.

It should be noted that, in the embodiment of the present invention, the downlink data may be data generated by Turbo (Turbo) coding, or data generated by coding in another coding method, which is not particularly limited in the embodiment of the present invention. The downlink data may include system bits and check bits, wherein the number of the check bits may be different according to different encoding modes. For example, when the downlink data is generated by Turbo coding, the check bits may include a first check bit and a second check bit.

The structure of the Turbo encoder is shown in fig. 2, and the Turbo encoder performs Parallel Concatenated Convolutional Coding (PCCC) through a Turbo coding inner interleaver and two branch encoders. Wherein each constituent encoder may be an 8-state sub-encoder. As shown in FIG. 2, the output stream x of the Turbo encoder_kThe system bit of the downlink data, namely the information of the data block itself in the input Turbo encoder; z is a radical of_kAnd z'_kCheck bits for downstream data, i.e. after interleaving encoding of the data blockAnd (4) information. For differentiation, in the embodiment of the present invention, two parity bits in the downlink data obtained through Turbo coding are respectively referred to as a first parity bit and a second parity bit. It should be noted that, in the embodiment of the present invention, the actual position of the first parity bit or the second parity bit in the data block is not limited at all, that is, the first parity bit may be z_kCan also be z'_k(ii) a Correspondingly, when the first check bit is z_kWhen the second check bit is z'_k(ii) a And when the first check bit is z'_kWhen the second check bit is z_k。

Referring to fig. 3, a flowchart of an embodiment of a data transmission method according to the invention is shown. The method described in this embodiment may be performed by a base station, and the present invention is further described from the perspective of the first base station with reference to fig. 3.

Step 301, the base station receives channel state information reported by the terminal.

The base station firstly receives the channel state information reported by the terminal. The channel state information is used for indicating a first downlink channel quality and another second downlink channel quality, the first downlink channel quality refers to a channel quality of a downlink channel between the base station and the terminal, and the second downlink channel quality refers to a channel quality of a downlink channel between another base station and the terminal; the first downlink channel quality may be measured by the base station when accessing the base station; and the second downlink channel quality can be measured by the base station when accessing the other base station. The Downlink Channel may include a Physical Downlink Shared Channel (PDSCH) and the like.

Wherein, the RATs adopted by the base station and the other base station may be the same or different. For example, when the base station is an LTE base station, the other base station may be a 5G base station; alternatively, when the base station is a 5G high frequency base station, the other base station may be a 5G low frequency base station. When the base station is an LTE base station and the another base station is a 5G base station, the base station may be a macro base station, and the another base station may be a micro base station arranged within a coverage area of the macro base station.

Step 302, the base station determines a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data according to the quality relationship between the first downlink channel quality and the second downlink channel quality.

After receiving the channel state information reported by the terminal, the base station may know, according to the channel state information, that it will jointly transmit downlink data to the terminal with another base station or more base stations. And determining a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data according to the quality relationship between the first downlink channel quality and the second downlink channel quality. Accordingly, the other part of the downlink data except the part to be transmitted may be transmitted to the terminal by the other base station.

When the downlink data includes a system bit and a check bit, the part to be transmitted may be the system bit or the check bit. Specifically, when the part to be transmitted is the system bit, the other parts are the check bits; and when the part to be transmitted is the check bit, the other parts are the system bits.

Because the influence of the receiving quality of the system bit on the successful decoding of the downlink data is higher than the influence of the receiving quality of the check bit on the successful decoding of the downlink data, when the downlink data is sent, the system bit of the downlink data can be sent to the terminal by the one with better channel quality of the downlink channels in the two base stations, and the check bit of the downlink data can be sent to the terminal by the one with poorer channel quality. That is, when the quality of the first downlink channel is inferior to the quality of the second downlink channel, the base station takes the check bit of the downlink data as the part to be transmitted; and when the quality of the first downlink channel is better than that of a second downlink channel, the base station takes the system bit of the downlink data as the part to be sent.

When the terminal decodes the downlink data encoded by the Turbo, the check bits of the downlink data include a first check bit and a second check bit, so the first check bit and the second check bit can be sent by the same base station or can be sent by two base stations respectively.

Optionally, when the quality of the first downlink channel is inferior to that of the second downlink channel, the base station may use the first parity bit of the downlink data as the part to be transmitted, or may use the first parity bit and the second parity bit of the downlink data as the part to be transmitted. When the quality of the first downlink channel is better than that of the second downlink channel, the base station may use the system bit of the downlink data as the part to be transmitted, or may use the system bit of the downlink data and the first check bit as the part to be transmitted. By adopting the determining mode, the system bit can be ensured to be sent to the terminal by the base station through the downlink channel with better quality.

The first downlink Channel Quality may be represented by a Channel Quality Indicator (CQI) of a downlink Channel between the base station and the terminal, and the second downlink Channel Quality may be represented by a CQI between the other base station and the terminal. The first downlink channel quality may be considered to be better than a second downlink channel quality if the CQI between the base station and the terminal is greater than the CQI between the other base station and the terminal; otherwise, the first downlink channel quality may be considered inferior to the second downlink channel quality.

In order to balance the load of each base station in the downlink data transmission process and avoid the over-high load of a certain base station, the base station and another base station can dynamically adjust the parts of the downlink data which need to be sent to the terminal respectively according to the load condition of the base station and the load condition of another base station.

Optionally, if the check bits of the downlink data include a first check bit and a second check bit, when the first downlink channel quality is inferior to the second downlink channel quality and the load of the other base station is higher than a first threshold, the base station takes the first check bit and the second check bit of the downlink data as the part to be transmitted; and when the first downlink channel quality is inferior to the second downlink channel quality and the load of the other base station is lower than a first threshold value, the base station takes the first check bit as the part to be transmitted. Wherein the base station may determine the load of the other base station by acquiring the load information of the other base station.

Optionally, when the quality of the first downlink channel is better than that of a second downlink channel and the load of the base station is higher than a second threshold, the base station takes the system bit of the downlink data as the part to be transmitted; and when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold value, the base station takes the system bit and the first check bit of the downlink data as the part to be sent. By adopting the determining mode, the overload of the downlink data of the base station with better channel quality of the downlink channel can be avoided on the premise of ensuring that the system bit can be sent to the terminal by the base station through the downlink channel with better quality.

The first threshold and the second threshold may be the same or different. In general, the first threshold may be set according to a type of the another base station, and the second threshold may be set according to the type of the base station.

It should be noted that, both the base station and the other base station may determine, by themselves, a part to be transmitted that needs to be transmitted from the base station to the terminal in the downlink data according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, or one of the base stations may determine a part that should be transmitted from the base station to the terminal in the downlink data, and further determine a part that should be transmitted from the other base station to the terminal in the downlink data, and correspondingly transmit an instruction to the other base station. The other base station can determine the part of the downlink data which needs to be sent to the terminal according to the indication. For example, when the base station is an LTE base station and the another base station is a 5G base station, after the base station determines a part to be transmitted that needs to be transmitted to the terminal by the LTE base station according to the good-bad relationship, the 5G base station may further instruct the terminal to transmit other parts of the downlink data to the terminal except the part to be transmitted.

Step 303, the base station sends the part to be sent to the terminal.

After receiving the channel state information, the base station may encode data to be transmitted to generate downlink data. When the base station and the other base station are in a cran (cloud Radio Access network), the downlink data can be generated by uniformly encoding data to be transmitted by the cloud computing platform, so that the energy consumption of the base station can be reduced.

Specifically, the base station and the another base station may obtain the downlink data from the cloud computing platform after receiving the channel state information reported by the terminal, so that the base stations do not need to encode the downlink data independently. When the downlink data is acquired from the cloud computing platform, the base station can acquire all the downlink data or only the data which needs to be sent to the terminal by the base station; similarly, when acquiring downlink data from the cloud computing platform, the other base station may acquire all downlink data, or may only acquire data that needs to be sent to the terminal by the other base station.

After acquiring the downlink data, the base station may send the part to be sent to the terminal. The specific transmission method is not described herein again.

By adopting the embodiment, the downlink data can be respectively sent by two different base stations through two different downlink channels, so that the situation that the base stations encounter the deep attenuation of the downlink channels in the process of sending the system bits and the check bits can be avoided, and the robustness of the data transmission process is improved. Moreover, the downlink data is jointly transmitted by the two base stations, and the downlink load of each base station can be balanced on the premise of ensuring the robustness of downlink data transmission.

Fig. 4 is a schematic flow chart of an embodiment of the data transmission method of the present invention. Embodiments of the present invention are further described below in conjunction with fig. 4 from a terminal perspective.

Step 401, a terminal reports channel state information to a first base station and a second base station respectively, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal.

In the scenario of base station joint scheduling, a terminal may access multiple base stations at the same time, so the terminal may measure the quality of the downlink channel from each base station to which the terminal is accessed, and send the measurement result to each base station to which the terminal is accessed through channel state indication information, so that each base station to which the terminal is accessed can know the quality of the downlink channel from the terminal and from other base stations to which the terminal is accessed.

In practical use, two base stations are used simultaneously to send downlink data to the terminal, so that the robustness of downlink data transmission can be ensured, and in order to balance the load among the base stations, the network side can select two base stations with lighter loads as the base stations sending the downlink data to the terminal according to the load conditions of the base stations. In order to ensure the robustness of downlink data transmission, the two base stations with lighter loads can be different types of base stations. For example, one is an LTE base station and one is a 5G base station.

After selecting the two base stations, the network side indicates to the terminal which two base stations will be used for sending downlink data through the high-level signaling, so that the terminal can determine the first base station and the second base station for downlink data transmission according to the high-level signaling. And after determining the first base station and the second base station according to the high-level signaling, the terminal respectively sends channel state information to the first base station and the second base station.

For example, in a scenario of joint scheduling between an LTE base station and a 5G base station, a terminal may be in coverage areas of multiple LTE base stations and multiple 5G base stations at the same time. The network side can select one LTE base station and one 5G base station to send downlink data to the terminal according to the load condition of each base station. The terminal may inform the 5G base station and the LTE base station of the channel quality of the PDSCH of the 5G base station and the channel quality of the PDSCH of the LTE base station, respectively.

Step 402, the terminal receives downlink data jointly transmitted by the first base station and the second base station, where a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and contents included in each of the first part and the second part are determined by a good-bad relationship between the first downlink channel quality and the second downlink channel quality.

After reporting the channel state information to the two base stations, the terminal can receive downlink data jointly transmitted by the two base stations. As can be seen from the foregoing embodiments, according to different goodness relationships between the first channel quality and the second channel quality, the specific manner in which the first base station and the second base station jointly transmit downlink data to the terminal is also different.

Optionally, when the quality of the first downlink channel is better than the quality of the second downlink channel, the first part may include systematic bits of the downlink data, and the second part may include parity bits of the downlink data; when the first downlink channel quality is inferior to the second downlink channel quality, the first part may include check bits of the downlink data, and the second part may include systematic bits of the downlink data. When the downlink data is generated by using a Turbo coding method, the check bits may include a first check bit and a second check bit.

Optionally, if the downlink data is generated by using a Turbo coding scheme, when the quality of the first downlink channel is better than the quality of the second downlink channel, the first part also includes the system bits and the first parity bits of the downlink data, and the second part only includes the second parity bits of the downlink data; when the first downlink channel quality is inferior to the second downlink channel quality, the first part only includes the first parity bits of the downlink data, and the second part includes the system bits and the second parity bits of the downlink data.

The specific way of receiving the downlink data by the terminal corresponds to the way of sending the downlink data to the terminal by the base station, and reference may be made to the foregoing embodiment for relevant parts, which is not described herein again.

After receiving downlink data jointly transmitted by the first base station and the second base station, the data received from the two base stations can be combined, so that complete downlink data can be obtained, and after the complete downlink data is obtained, the terminal uniformly decodes the received downlink data. For example, after the terminal receives the systematic bits of the downlink data from the first base station and receives the first parity bits and the second parity bits of the downlink data from the second base station, the systematic bits, the first parity bits and the second parity bits may be combined into complete downlink data, and then the downlink data is decoded to obtain the data required by the terminal.

By adopting the embodiment, the downlink data can be respectively sent by two different base stations, so that all parts of the downlink data can be prevented from being sent by the same base station, the base station with poor channel quality can also participate in the sending of the downlink data, the capacity of the base station with poor channel quality can be prevented from being wasted, and the load of each base station can be balanced. By adopting the embodiment, the situation of channel deep attenuation in the process of sending the system bit and the check bit can be avoided, and the robustness in the data transmission process is improved.

In order to fully utilize the wireless resources and system capacity of the base stations on the premise of ensuring the robustness of downlink data transmission, two or more base stations can be used for jointly transmitting downlink data to the terminal, and besides, the downlink data can also be jointly transmitted to the same terminal through different data transmission resources of the same base station.

Fig. 5 is a schematic flow chart of another embodiment of the data transmission method of the present invention. This embodiment may be performed by a base station.

Step 501, the base station receives channel state information reported by the terminal.

The base station firstly receives channel state information reported by a terminal, wherein the channel state information is used for indicating the channel quality of at least two downlink channels between the base station and the terminal, and the at least two downlink channels use different data transmission resources for downlink data transmission. Wherein each of the data transmission resources is a radio resource that can be independently used for data transmission between the base station and the terminal.

For example, each of the data transmission resources may be an antenna port of the base station, or a sub-bandwidth divided from a system bandwidth of the base station, and the like. When the data transmission resource is a sub-bandwidth, each downlink channel uses a different sub-bandwidth for downlink data transmission; and when the data transmission resource is an antenna port, each downlink channel uses a different antenna port to perform downlink data transmission.

Step 502, the base station jointly sends downlink data to the terminal through the at least two downlink channels; wherein the channel quality of the downlink channel for transmitting the downlink data system bits is better than the channel quality of the downlink channel for transmitting the downlink data check bits only.

Because the channel quality of the at least two data transmission resources are different, the base station can select two or more data transmission resources from the at least two data transmission resources according to the use condition of each data transmission resource to send downlink data to the base station. Wherein, the better channel quality of the at least two data transmission resources is used for at least transmitting the system bit of the downlink data, and the worse channel quality of the at least two data transmission resources is used for at least transmitting a part of the check bit of the downlink data.

Optionally, the base station sends the system bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels; the base station sends the downlink data check bit to the terminal through a second downlink channel of the at least two downlink channels; wherein the channel quality of the first downlink channel is better than the channel quality of the second downlink channel.

Optionally, the base station sends the system bit and the first check bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels; the base station sends a second check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels; wherein the channel quality of the first downlink channel is better than the channel quality of the second downlink channel.

It should be noted that, similar to the foregoing embodiment, the downlink data may also be generated by encoding by a base station, or acquired by the base station from a cloud computing platform, and the specific manner may be referred to the foregoing, and is not described herein again.

By adopting the technical scheme of the embodiment, the wireless resources can be fully utilized while the data transmission robustness is ensured.

Fig. 6 is a schematic flow chart of another embodiment of the data transmission method of the present invention. This embodiment may be performed by a terminal.

Step 601, a terminal reports channel state information to a base station, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, and the at least two downlink channels use different data transmission resources to perform downlink data transmission.

After accessing the base station, the terminal may detect the channel quality of each data transmission resource, and then report the channel quality of at least two data transmission resources to the base station.

In actual use, the terminal may measure and report the channel quality of each data transmission resource to the base station, or may report the channel quality of only part of the data transmission resources to the base station; when the terminal reports the channel quality of part of the data transmission resources to the UE, the channel quality of which data transmission resources can be reported can be indicated by a high-level signaling; or may be selected by the terminal itself.

Step 602, the terminal receives downlink data jointly transmitted by the base station through the at least two downlink channels, wherein the channel quality of the downlink channel for transmitting the downlink data system bit is better than the channel quality of the downlink channel for transmitting the downlink data check bit only.

According to different modes of sending downlink data by the base station, the modes of receiving the downlink data by the terminal are different. Optionally, the terminal may receive the system bit of the downlink data through one downlink channel, and receive the first parity bit and the second parity bit of the downlink data through another downlink channel. Optionally, the terminal may also receive the system bit and the first check bit of the downlink data through one downlink channel, and receive the second check bit of the downlink data through another downlink channel.

The base station may parse the downlink data after receiving the system bit, the first parity bit, and the second parity bit of the downlink data.

By adopting the embodiment of the invention, the downlink data is sent by the base station through two different downlink channels, thereby avoiding the situation that the downlink channels are seriously attenuated when the system bit and the check bit are sent, and improving the robustness of data transmission.

Fig. 7 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention. The apparatus may be disposed on a base station, or may be the base station itself, and the apparatus may be configured to perform the data transmission method shown in fig. 3.

As shown in fig. 7, the apparatus may include: a receiving unit 701, configured to receive channel state information reported by a terminal, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; a determining unit 702, configured to determine, according to a good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be sent that needs to be sent from the base station to the terminal in downlink data; a sending unit 703, configured to send the part to be sent to the terminal.

Optionally, the determining unit 702 is specifically configured to, when the quality of the first downlink channel is inferior to the quality of the second downlink channel, use the downlink data parity bits as the part to be transmitted.

Optionally, the determining unit 702 is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality and the load of the another base station is higher than a first threshold, use the check bit of the downlink data as the part to be transmitted.

Optionally, the determining unit 702 is specifically configured to, when the quality of the first downlink channel is inferior to the quality of the second downlink channel, use a first parity bit of the downlink data as the part to be transmitted, where the parity bit of the downlink data includes the first parity bit and the second parity bit.

Optionally, the determining unit 702 is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality and the load of the another base station is lower than a first threshold, use a first parity bit of the downlink data as the part to be transmitted, where the parity bit of the downlink data includes the first parity bit and the second parity bit.

Optionally, the determining unit 702 is specifically configured to, when the quality of the first downlink channel is better than the quality of the second downlink channel, use the system bit of the downlink data as the part to be sent.

Optionally, the determining unit 702 is specifically configured to, when the quality of the first downlink channel is better than the quality of a second downlink channel and the load of the base station is lower than a second threshold, use the system bit of the downlink data as the part to be transmitted.

Optionally, the determining unit 702 is specifically configured to, when the quality of the first downlink channel is better than the quality of the second downlink channel, use a system bit and a first parity bit of the downlink data as the part to be transmitted, where the downlink data includes the first parity bit and the second parity bit.

The determining unit 702 is specifically configured to, when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold, use a system bit and a first parity bit of the downlink data as the part to be transmitted, where the downlink data includes the first parity bit and the second parity bit.

Fig. 8 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention. The embodiment may be provided on a terminal, or may be the terminal itself, and the apparatus may be configured to execute the data transmission method shown in fig. 4.

As shown in fig. 8, the apparatus may include: a reporting unit 801, configured to report channel state information to a first base station and a second base station, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; a receiving unit 802, configured to receive downlink data jointly transmitted by the first base station and the second base station, where a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and contents included in each of the first part and the second part are determined by a good-bad relationship between the first downlink channel quality and the second downlink channel quality.

When the first downlink channel quality is better than the second downlink channel quality, the first part comprises system bits and first check bits of the downlink data, and the second part comprises second check bits of the downlink data; when the first downlink channel quality is inferior to the second downlink channel quality, the first part comprises first check bits of the downlink data, and the second part comprises the first check bits and second check bits of the downlink data; when the first downlink channel quality is better than the second downlink channel quality, the first part comprises the downlink data system bits and the first check bits, and the second part comprises the second check bits of the downlink data; when the first downlink channel quality is inferior to the second downlink channel quality, the first part comprises first check bits of the downlink data, and the second part comprises the first check bits and second check bits of the downlink data.

The apparatus may further include: a determining unit, configured to determine the first base station and the second base station according to a high-level signaling.

For specific description of the functions of each unit of the apparatus, reference may be made to relevant contents of other embodiments of the present invention, which are not described herein again.

Fig. 9 is a schematic structural diagram of another embodiment of the data transmission device of the present invention. The embodiment may be disposed on a base station, or may be the base station itself, and is used to execute the data transmission method shown in fig. 5.

As shown in fig. 9, the apparatus may include: a receiving unit 901, configured to receive channel state information reported by a terminal, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; a sending unit 902, configured to send downlink data to the terminal through the at least two downlink channels jointly; wherein the channel quality of the downlink channel for transmitting the downlink data system bits is better than the channel quality of the downlink channel for transmitting the downlink data check bits only.

Optionally, the sending unit 902 is specifically configured to send the system bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels, and send the check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels, where a channel quality of the first downlink channel is better than a channel quality of the second downlink channel.

Optionally, the sending unit 902 is specifically configured to send the system bit and the first check bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels, and send the second check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels, where a channel quality of the first downlink channel is better than a channel quality of the second downlink channel.

The data transmission resource may be an antenna port of the base station or a subband of a system bandwidth of the base station.

Fig. 10 is a schematic structural diagram of another embodiment of the data transmission device according to the present invention. The embodiment may be provided on a terminal, or may be the terminal itself, for executing the data transmission method shown in fig. 6.

As shown in fig. 10, the apparatus may include: a sending unit 1001, configured to report channel state information to a base station, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; a receiving unit 1002, configured to receive downlink data jointly transmitted by the base station through the at least two downlink channels, where a channel quality of a downlink channel used for transmitting the downlink data system bits is better than a channel quality of a downlink channel used for transmitting the downlink data check bits only.

Corresponding to the data transmission method and the data transmission device, the embodiment of the invention also provides a base station and a terminal.

Fig. 11 is a schematic structural diagram of a base station according to the present invention. Functionally, the base station may be a macro base station or a micro base station, and the base station may be an LTE base station or a 5G base station from the RAT adopted by the base station.

As shown in fig. 11, the base station may include: processor 1101, memory 1102, and communication module 1103. These components are connected and communicate via one or more buses, in a bus architecture, a star architecture, or the like.

The processor 1101 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and executes various functions of the terminal and/or processes data by operating or executing software programs and/or modules stored in the memory 1102 and calling data stored in the memory 1102. The processor 1101 may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs connected with the same or different functions. For example, the processor 1101 may include only a Central Processing Unit (CPU), or may be a combination of a CPU and a Digital Signal Processor (DSP), a control chip (e.g., a baseband chip) in the communication module 1103. In the embodiment of the present invention, the CPU may be a single operation core, or may include multiple operation cores.

The memory 1102 may be used to store software programs and modules, and the processor 1101 executes various functional applications of the terminal and implements data processing by operating the software programs and modules stored in the memory 1102. In an embodiment of the invention, the Memory 1102 may include a volatile Memory, such as a Nonvolatile dynamic Random Access Memory (NVRAM), a Phase change Random Access Memory (PRAM), a Magnetoresistive Random Access Memory (MRAM), and a non-volatile Memory, such as at least one magnetic disk Memory device, an electrically erasable Programmable Read-Only Memory (EEPROM), a flash Memory device, such as a NAND flash Memory, or a nor flash Memory.

The communication module 1103 is configured to establish a communication channel, so that the base station can communicate with other devices, such as a terminal, through the communication channel. The communication module 1103 may include a Base Band (Base Band) module and other communication modules, and a Radio Frequency (RF) circuit corresponding to the communication module. In different embodiments of the present invention, the various communication modules in the communication module 1103 are generally in the form of Integrated Circuit chips (Integrated Circuit chips), and may be selectively combined without including all the communication modules and corresponding antenna groups. For example, the communication module 1103 may include only a baseband chip, a radio frequency chip and a corresponding antenna to provide communication functions in a cellular communication system. The terminal may be connected to a Cellular Network (Cellular Network) or the Internet (Internet) via a wireless communication connection established by the communication module 1103, such as a wireless local area Network access or a WCDMA access. In some optional embodiments of the present invention, a communication module, such as a baseband module, in the communication module 1103 may be integrated into the processor 1101, typically an APQ + MDM series platform provided by the high-pass (Qualcomm) corporation.

Corresponding to the data transmission method shown in fig. 3, in an optional implementation manner, the communication module 1103 is configured to receive channel state information reported by a terminal, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; the processor 1101 is configured to determine, according to a good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted that needs to be transmitted from the base station to the terminal in downlink data; the communication module 1103 is further configured to send the part to be sent to the terminal.

Optionally, the processor 1101 may be specifically configured to use the first check bit of the downlink data as the part to be transmitted when the quality of the first downlink channel is inferior to the quality of the second downlink channel. Specifically, when the first downlink channel quality is worse than the second downlink channel quality, the processor 1101 determines the load of the other base station; and when the load of the other base station is lower than a first threshold value, taking the first check bit of the downlink data as the part to be transmitted.

Optionally, the processor 1101 may be specifically configured to use the first parity bit and the second parity bit of the downlink data as the part to be sent when the quality of the first downlink channel is inferior to the quality of the second downlink channel. Specifically, when the first downlink channel quality is worse than the second downlink channel quality, the processor 1101 may determine the load of the other base station; and when the load of the other base station is higher than a first threshold value, taking the first check bit and the second check bit of the downlink data as the part to be sent.

Optionally, the processor 1101 may be specifically configured to use the system bit of the downlink data as the part to be transmitted when the quality of the first downlink channel is better than the quality of the second downlink channel. Specifically, the processor 1101 may determine the load of the base station when the first downlink channel quality is better than the second downlink channel quality; and when the load of the base station is lower than a second threshold value, taking the system bit of the downlink data as the part to be sent.

Optionally, the processor 1101 may be specifically configured to use the system bit and the first check bit of the downlink data as the part to be transmitted when the quality of the first downlink channel is better than the quality of the second downlink channel. Specifically, the processor 1101 may determine the load of the base station when the first downlink channel quality is better than the second downlink channel quality; and when the load of the base station is lower than a second threshold value, taking the system bit and the first check bit of the downlink data as the part to be transmitted.

Corresponding to the data transmission method shown in fig. 5, in another optional implementation, the communication module 1103 is configured to receive channel state information reported by a terminal, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; sending downlink data to the terminal through the at least two downlink channels in a combined manner; wherein the channel quality of the downlink channel for transmitting the downlink data system bits is better than the channel quality of the downlink channel for transmitting the downlink data check bits only. And the relative merits between the channel qualities of the at least two downlink channels are determined by the processor 1101.

Optionally, when the channel quality of the first downlink channel is better than the channel quality of the second downlink channel, the communication module 1103 may be specifically configured to send the system bit of the downlink data to the terminal through the first downlink channel of the at least two downlink channels; and sending the downlink data check bits to the terminal through a second downlink channel of the at least two downlink channels.

Optionally, when the channel quality of the first downlink channel is better than the channel quality of the second downlink channel, the communication module 1103 may be specifically configured to send the system bit and the first check bit of the downlink data to the terminal through the first downlink channel of the at least two downlink channels; and sending a second check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels.

Fig. 12 is a schematic structural diagram of the terminal according to the present invention. In the embodiment of the present invention, the terminal may include various terminal devices or user devices, such as a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a Point of sale (POS), a vehicle-mounted computer, and the like.

As shown in fig. 12, the terminal may also include components such as a processor 1201, a memory 1202, and a communication module 1203. In addition, the terminal may include components such as an output module 1204, an input module 1205, and a sensor 1206, which may be connected and communicate via one or more buses, in a bus configuration, a star configuration, or the like.

The processor 1201 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and/or processes data by operating or executing software programs and/or modules stored in the memory 1202 and calling data stored in the memory 1202. The processor 1201 may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs connected with the same or different functions. For example, the processor 1201 may include only a Central Processing Unit (CPU), or may be a combination of a GPU, a Digital Signal Processor (DSP), and a control chip (e.g., a baseband chip) in the communication module 1203. In the embodiment of the present invention, the CPU may be a single operation core, or may include multiple operation cores.

The communication module 1203 is configured to establish a communication channel, so that the terminal can connect to a remote server through the communication channel, and the remote server can send data or download media data from the remote server. The communication module 1203 may include a Wireless Local Area Network (wlan) module, a bluetooth module, a baseband (Base Band) module, and other communication modules, and a Radio Frequency (RF) circuit corresponding to the communication module, and is configured to perform wlan communication, bluetooth communication, infrared communication, and/or cellular communication system communication, such as Wideband Code Division Multiple Access (W-CDMA) and/or High Speed Downlink Packet Access (HSDPA). The communication module is used for controlling communication of each component in the terminal and can support Direct Memory Access (Direct Memory Access).

In different embodiments of the present invention, the various communication modules in the communication module 1203 generally appear in the form of an Integrated Circuit Chip (Integrated Circuit Chip), and may be selectively combined without including all the communication modules and corresponding antenna groups. For example, the communication module 1203 may include only a baseband chip, a radio frequency chip and a corresponding antenna to provide communication functions in a cellular communication system. The terminal may be connected to a Cellular Network (Cellular Network) or the Internet (Internet) via a wireless communication connection established by the communication module 1203, such as a wireless local area Network access or a WCDMA access. In some alternative embodiments of the present invention, the communication module, e.g., the baseband module, in the communication module 1203 may be integrated into the processor 1201, typically an APQ + MDM series platform as provided by the Qualcomm corporation. The radio frequency circuit is used for receiving and sending signals in the process of information transceiving or conversation. For example, after receiving downlink information of the base station, the downlink information is processed by the processor 1201; in addition, the data for designing uplink is transmitted to the base station. Typically, the radio frequency circuitry includes well-known circuitry for performing these functions, including but not limited to an antenna system, a radio frequency transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor 1201, a Codec (Codec) chipset, a Subscriber Identity Module (SIM) card, memory 1202, and so forth. In addition, the radio frequency circuitry may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for mobile communication), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access), WCDMA (wideband Code Division Multiple Access), High Speed Uplink Packet Access (HSUPA), LTE (Long Term Evolution), email, SMS (Short Messaging Service), and the like.

The memory 1202 may be used to store software programs and modules, and the processor 1201 executes various functional applications of the terminal and implements data processing by operating the software programs and modules stored in the memory 1202. The memory 1202 mainly includes a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function, such as a sound playing program, an image playing program, and the like; the data storage area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal, etc. In an embodiment of the present invention, the Memory 1202 may include a volatile Memory, such as a Nonvolatile dynamic Random Access Memory (NVRAM), a Phase Change Random Access Memory (PRAM), a Magnetoresistive Random Access Memory (MRAM), and a non-volatile Memory, such as at least one magnetic disk Memory device, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a flash Memory device, such as a flash Memory (NOR) or a flash Memory (NAND). The nonvolatile memory stores an operating system and an application program executed by the processor 1201. The processor 1201 loads operating programs and data from the non-volatile memory into memory and stores digital content in mass storage devices. The operating system includes various components and/or drivers for controlling and managing conventional system tasks, such as memory management, storage device control, power management, etc., as well as facilitating communication between various hardware and software components. In the embodiment of the present invention, the operating system may be an Android system developed by Google, an iOS system developed by Apple, a Windows operating system developed by Microsoft, or an embedded operating system such as Vxworks.

The input module 1205 may include a touch screen, a microphone, and the like, for receiving user input operations and the like to generate signal inputs related to function control of the terminal. The output module 1204 may include an audio circuit display panel, an audio circuit, a speaker, etc. for outputting information in the form of video or audio. The sensor 1206 may include a light sensor, a motion sensor, an infrared sensor, and the like.

Corresponding to the data transmission method shown in fig. 4, in an optional implementation manner, the communication module 1203 is configured to report channel state information to a first base station and a second base station respectively, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal; and receiving downlink data jointly transmitted by the first base station and the second base station, wherein a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and contents contained in the first part and the second part are determined by a good-bad relation between the first downlink channel quality and the second downlink channel quality. The processor 1201 is configured to decode the downlink data.

Corresponding to the data transmission method shown in fig. 5, in another optional implementation, the communication module 1203 is configured to report channel state information to a base station, where the channel state information is used to indicate channel qualities of at least two downlink channels between the base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission; and receiving downlink data jointly transmitted by the base station through the at least two downlink channels, wherein the channel quality of the downlink channel for transmitting the downlink data system bits is superior to the channel quality of the downlink channel for transmitting the downlink data check bits only.

Fig. 1 is a schematic diagram of a communication system according to the present invention.

As shown in fig. 1, the communication system may include a first base station and a second base station having overlapping coverage areas.

The first base station may be a macro base station, and the second base station may be a micro base station under the macro base station.

It will be appreciated that the communication system may comprise more base stations than the first base station and the second base station, for example a plurality of micro base stations within the coverage of a macro base station.

In a possible implementation manner, the terminal is configured to report channel state information to the first base station and the second base station at the same time after accessing the first base station and the second base station, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the first base station and the terminal and a second downlink channel quality of the downlink channel between the second base station and the terminal.

The first base station and the second base station can respectively receive the channel state information reported by the terminal and jointly send downlink data to the terminal according to the channel state information.

After receiving the channel state information, the first base station may determine, according to the quality relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted by the first base station, in downlink data; the second base station may also determine, according to the quality relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted by the second base station, in the downlink data. The part to be transmitted which needs to be transmitted by the first base station and the part to be transmitted which needs to be transmitted by the second base station are combined to form the complete downlink data. It should be noted that there may be no repetition or repetition between the part to be transmitted that needs to be transmitted by the first base station and the part to be transmitted that needs to be transmitted by the second base station.

When the quality of the first downlink channel is inferior to that of the second downlink channel, the first base station may use the first check bit of the downlink data as a part to be transmitted that needs to be transmitted by the first base station; accordingly, the second base station may use the system bit and the second parity bit of the downlink data as the part to be transmitted that needs to be transmitted by the second base station.

When the quality of the first downlink channel is inferior to that of the second downlink channel, the first base station may use the first check bit and the second check bit of the downlink data as a part to be transmitted that needs to be transmitted by the first base station; correspondingly, the second base station may use the system bits of the downlink data as a part to be transmitted, which needs to be transmitted by the second base station.

When the quality of the first downlink channel is better than that of the second downlink channel, the first base station may use the system bit of the downlink data as a part to be transmitted that needs to be transmitted by the first base station; correspondingly, the second base station may use the first check bit of the downlink data as a part to be transmitted, which needs to be transmitted by the second base station.

When the quality of the first downlink channel is better than that of the second downlink channel, the first base station may use the system bit of the downlink data as a part to be transmitted that needs to be transmitted by the first base station; accordingly, the second base station may use the first parity bit and the second parity bit of the downlink data as a part to be transmitted, which needs to be transmitted by the second base station.

And after receiving the downlink data jointly issued by the first base station and the second base station, the terminal decodes the downlink data along with the system bit, the first check bit and the second check bit so as to acquire the required data.

For a specific manner of jointly sending downlink data to the terminal by the first base station and the second base station, reference may be made to the foregoing embodiment, and details are not described herein again.

In a specific implementation manner, an embodiment of the present invention further provides a computer storage medium, where the computer storage medium may store a program, and when the program is executed, the program may include some or all of the steps in each embodiment of the data transmission method provided by the present invention. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.

In the present description, each embodiment is described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, for example, the description of the above-mentioned apparatus or device may refer to the corresponding method embodiment. The above-described embodiments of the present invention do not limit the scope of the present invention.

Claims

1. A method of data transmission, comprising:

a base station receives channel state information reported by a terminal, wherein the channel state information is used for indicating a first downlink channel quality of a downlink channel between the base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal;

the base station determines a part to be sent in downlink data according to the quality relation between the first downlink channel quality and the second downlink channel quality;

the base station sends the part to be sent to the terminal;

and when the quality of the first downlink channel is inferior to that of the second downlink channel, the base station takes the check bit of the downlink data as the part to be transmitted.

2. The method of claim 1, wherein the determining, by the base station, the portion to be transmitted in the downlink data, which needs to be transmitted from the base station to the terminal, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, comprises:

and when the quality of the first downlink channel is inferior to that of the second downlink channel and the load of the other base station is higher than a first threshold value, the base station takes the check bit of the downlink data as the part to be transmitted.

3. The method of claim 1, wherein the parity bits of the downstream data comprise a first parity bit and a second parity bit;

the base station determining, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted, which needs to be transmitted from the base station to the terminal, in downlink data includes:

and when the first downlink channel quality is inferior to the second downlink channel quality, the base station takes the first check bit as the part to be sent.

4. The method of claim 1, wherein the parity bits of the downstream data comprise a first parity bit and a second parity bit;

and when the first downlink channel quality is inferior to the second downlink channel quality and the load of the other base station is lower than a first threshold value, the base station takes the first check bit of the downlink data as the part to be transmitted.

5. The method of claim 1, wherein the determining, by the base station, the portion to be transmitted in the downlink data, which needs to be transmitted from the base station to the terminal, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, comprises:

and when the quality of the first downlink channel is better than that of a second downlink channel, the base station takes the system bit of the downlink data as the part to be sent.

6. The method of claim 1, wherein the determining, by the base station, the portion to be transmitted in the downlink data, which needs to be transmitted from the base station to the terminal, according to the good-bad relationship between the first downlink channel quality and the second downlink channel quality, comprises:

and when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is higher than a second threshold value, the base station takes the system bit of the downlink data as the part to be sent.

7. The method of claim 5 or 6, wherein the parity bits of the downstream data comprise a first parity bit and a second parity bit;

and when the quality of the first downlink channel is better than that of a second downlink channel, the base station takes the system bit of the downlink data and the first check bit as the part to be transmitted.

8. The method of claim 5 or 6, wherein the parity bits of the downstream data comprise a first parity bit and a second parity bit;

and when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold value, the base station takes the system bit and the first check bit of the downlink data as the part to be sent.

9. A method of data transmission, comprising:

a terminal reports channel state information to a first base station and a second base station respectively, wherein the channel state information is used for indicating the first downlink channel quality of a downlink channel between the first base station and the terminal and the second downlink channel quality of the downlink channel between the second base station and the terminal;

the terminal receives downlink data jointly transmitted by the first base station and the second base station, wherein a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and the contents of the first part and the second part are determined by the quality relation between the first downlink channel quality and the second downlink channel quality;

when the first downlink channel quality is better than the second downlink channel quality, the first part comprises system bits of the downlink data, and the second part comprises check bits of the downlink data.

10. The method of claim 9,

when the first downlink channel quality is better than the second downlink channel quality, the first part comprises the system bits and the first check bits of the downlink data, and the second part comprises the second check bits of the downlink data.

11. The method of claim 9,

when the first downlink channel quality is inferior to the second downlink channel quality, the first part includes check bits of the downlink data, and the second part includes system bits of the downlink data.

12. The method of claim 9,

when the first downlink channel quality is inferior to the second downlink channel quality, the first part comprises first check bits of the downlink data, and the second part comprises system bits and second check bits of the downlink data.

13. A data transmission apparatus, comprising:

a receiving unit, configured to receive channel state information reported by a terminal, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between a base station and the terminal and a second downlink channel quality of a downlink channel between another base station and the terminal;

a determining unit, configured to determine, according to a quality relationship between the first downlink channel quality and the second downlink channel quality, a part to be transmitted that needs to be transmitted from the base station to the terminal in downlink data;

a sending unit, configured to send the part to be sent to the terminal;

the determining unit is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality, use the check bit of the downlink data as the part to be transmitted.

14. The apparatus of claim 13,

the determining unit is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality and the load of the another base station is higher than a first threshold, use the check bit of the downlink data as the part to be transmitted.

15. The apparatus of claim 13,

the determining unit is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality, use a first parity bit of the downlink data as the part to be transmitted, where the parity bit of the downlink data includes the first parity bit and the second parity bit.

16. The apparatus of claim 13,

the determining unit is specifically configured to, when the first downlink channel quality is inferior to the second downlink channel quality and the load of the other base station is lower than a first threshold, use a first parity bit of the downlink data as the part to be transmitted, where the parity bit of the downlink data includes the first parity bit and a second parity bit.

17. The apparatus of claim 13,

the determining unit is specifically configured to, when the quality of the first downlink channel is better than the quality of the second downlink channel, use the system bit of the downlink data as the part to be transmitted.

18. The apparatus of claim 17,

the determining unit is specifically configured to, when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold, use the system bit of the downlink data as the part to be transmitted.

19. The apparatus of claim 17 or 18,

the determining unit is specifically configured to, when the quality of the first downlink channel is better than the quality of the second downlink channel, use a system bit and a first parity bit of the downlink data as the part to be transmitted, where the downlink data includes the first parity bit and the second parity bit.

20. The apparatus of claim 17 or 18,

the determining unit is specifically configured to, when the first downlink channel quality is better than the second downlink channel quality and the load of the base station is lower than a second threshold, use a system bit and a first parity bit of the downlink data as the part to be transmitted, where the downlink data includes the first parity bit and the second parity bit.

21. A data transmission apparatus, comprising:

a reporting unit, configured to report channel state information to a first base station and a second base station, where the channel state information is used to indicate a first downlink channel quality of a downlink channel between the first base station and a terminal and a second downlink channel quality of the downlink channel between the second base station and the terminal;

a receiving unit, configured to receive downlink data jointly transmitted by the first base station and the second base station, where a first part of the downlink data is transmitted by the first base station, a second part of the downlink data is transmitted by the second base station, and contents included in each of the first part and the second part are determined by a good-bad relationship between the first downlink channel quality and the second downlink channel quality;

22. The apparatus of claim 21,

23. The apparatus of claim 21,

24. The apparatus of claim 21,

25. A method of data transmission, comprising:

a base station receives channel state information reported by a terminal, wherein the channel state information is used for indicating the channel quality of at least two downlink channels between the base station and the terminal, and the at least two downlink channels use different data transmission resources for downlink data transmission;

the base station jointly sends downlink data to the terminal through the at least two downlink channels; wherein a channel quality of a downlink channel for transmitting the systematic bits of the downlink data is better than a channel quality of a downlink channel for transmitting only the parity bits of the downlink data.

26. The method as claimed in claim 25, wherein said base station jointly transmitting downlink data to said terminal through said at least two downlink channels comprises:

the base station sends the system bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels;

the base station sends the check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels; wherein the channel quality of the first downlink channel is better than the channel quality of the second downlink channel.

27. The method as claimed in claim 25, wherein said base station jointly transmitting downlink data to said terminal through said at least two downlink channels comprises:

the base station sends a system bit and a first check bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels;

the base station sends a second check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels; wherein the channel quality of the first downlink channel is better than the channel quality of the second downlink channel.

28. The method of any one of claims 25 to 27,

the data transmission resource is an antenna port of the base station or a sub-bandwidth of a system bandwidth of the base station.

29. A data transmission apparatus, comprising:

a receiving unit, configured to receive channel state information reported by a terminal, where the channel state information is used to indicate channel qualities of at least two downlink channels between a base station and the terminal, where the at least two downlink channels use different data transmission resources for downlink data transmission;

a sending unit, configured to send downlink data to the terminal through the at least two downlink channels in a joint manner; wherein the channel quality of the downlink channel for transmitting the system bits of the downlink data is better than the channel quality of the downlink channel for transmitting only the check bits of the downlink data.

30. The apparatus of claim 29,

the sending unit is specifically configured to send the system bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels, and send the check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels, where a channel quality of the first downlink channel is better than a channel quality of the second downlink channel.

31. The apparatus of claim 29,

the sending unit is specifically configured to send the system bit and the first check bit of the downlink data to the terminal through a first downlink channel of the at least two downlink channels, and send the second check bit of the downlink data to the terminal through a second downlink channel of the at least two downlink channels, where a channel quality of the first downlink channel is better than a channel quality of the second downlink channel.

32. The apparatus of any one of claims 29 to 31,

the data transmission resource is an antenna port of the base station or a sub-band of a system bandwidth of the base station.