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Method and device for data transmission

A data transmission method and a technology of a data transmission device, which are applied in the field of communication, can solve problems that affect system resource usage efficiency, feedback information and retransmission data cannot be transmitted smoothly, and achieve smooth transition and improve usage efficiency

Active Publication Date: 2015-06-17
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the uplink and downlink ratios of wireless frames change, there will be defects that feedback information and retransmission data cannot be transmitted smoothly, which will affect the efficiency of system resource usage

Method used

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  • Method and device for data transmission
  • Method and device for data transmission
  • Method and device for data transmission

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Embodiment 1

[0274] An embodiment of the present invention provides a data transmission method, which is suitable for user equipment. Specifically, the user equipment receives the downlink data sent by the network device (such as a base station), judges whether it is received correctly, and generates corresponding uplink response information. The uplink response information includes ACK (Acknowledgment, positive response) or NACK (Negative Acknowledgment, negative response) , the user equipment sends uplink response information to the base station.

[0275] In the data transmission method provided by the embodiment of the present invention, if the uplink and downlink ratio changes, the user equipment needs to know the time of changing the uplink and downlink ratio in advance, as well as the uplink and downlink ratio before and after the change. Optionally, the network device can use a proprietary RRC (Radio Resource Control, radio resource control) signaling notifies the user equipment of ...

Embodiment 2

[0313] An embodiment of the present invention provides a data transmission method, which is suitable for network equipment (such as a base station). Specifically, the network device receives the uplink data sent by the user equipment, judges whether it is received correctly, and generates corresponding downlink response information (ACK or NACK), and the base station sends the downlink response information to the user equipment.

[0314] In the data transmission method of the embodiment of the present invention, if the uplink and downlink configuration changes, the user equipment needs to know in advance the time when the uplink and downlink configuration changes, as well as the uplink and downlink configuration before and after the change. Optionally, the network device can use a dedicated RRC signal Before the uplink and downlink ratio changes, the user equipment is notified of the change time of the uplink and downlink ratio, and the uplink and downlink ratio before and afte...

Embodiment 3

[0352] An embodiment of the present invention provides a data transmission method, which is suitable for user equipment. Before data transmission, the network device first sends a scheduling authorization command to the user equipment, and the user equipment schedules uplink data according to the scheduling authorization command.

[0353] In the data transmission method of the embodiment of the present invention, if the uplink and downlink configuration changes, the user equipment needs to know in advance the time when the uplink and downlink configuration changes, as well as the uplink and downlink configuration before and after the change. Optionally, the network device can use a dedicated RRC signal Before the uplink and downlink ratio changes, the user equipment is notified of the change time of the uplink and downlink ratio, and the uplink and downlink ratio before and after the change. Of course, other methods, such as broadcast messages or physical layer signaling, can a...

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Abstract

Disclosed in an embodiment of the present invention is a data transmission method, comprising: receiving the downlink data transmitted by a base station via a downlink subframe or a special subframe in a first wireless frame; in a second wireless frame, using a first uplink subframe to transmit a response message to the base station, the time interval between the first uplink subframe and the downlink subframe or the special subframe of the first wireless frame satisfying a time threshold requirement, a first timing being the time interval between the downlink subframe or the special subframe transmitting downlink data and the uplink subframe feeding back the response message of the downlink data according to the uplink-downlink ratio of the first wireless frame, the second wireless frame being the neighboring frame of the first wireless frame, and the uplink-downlink ratio of the second wireless frame being different from that of the first wireless frame. When the uplink-downlink ratio changes, the present invention can correctly feed back the response message between a user equipment and the base station, thus improving the system resource use efficiency.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular, to a data transmission method and device. Background technique [0002] In the new generation communication system, HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) is a hybrid error control method that combines FEC (Forward Error Correction, Forward Error Correction Coding) and ARQ (Automatic Repeat ReQuest, Automatic Repeat Request) . The main implementation process of HARQ includes: the sending end sends new data, the receiving end buffers and decodes the received data, and sends affirmative (ACK) or non-deterministic (NACK) feedback information to the sending end according to the verification result. If the sending end receives definite feedback information, it will start sending new data; if the sending end receives non-deterministic feedback information, it means that the sending end has sent an error in the data, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04L1/18H04L1/00
CPCH04L1/1812H04L1/1854
Inventor 陈小波李洋李超君
Owner HONOR DEVICE CO LTD