Method and system for transmitting data

A data transmission method and a technology of a data transmission system, applied in digital transmission systems, transmission systems, error prevention/detection using return channels, etc., can solve problems affecting HARQ performance, waste of resources, untimely confirmation information, etc., to reduce Feedback signaling overhead, improved utilization, and high accuracy

Active Publication Date: 2007-06-20
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

However, FEC also has some disadvantages: when the decoding is wrong, the wrong information is also sent to the user terminal, so the reliability of the FEC communication system is not high
However, SAW has a major disadvantage: the confirmation message is not timely, and the sender must wait for the confirmation message before sending the next code block
[0022] However, in this technical solution, since the adjustment of the maximum number of retransmissions is carried out according to the change of channel conditions, there is a certain error due to the influence of time delay, so the accuracy of tracking channel conditions decreases, resulting in an increase in the bit error rate or resource loss. In addition, since all the coded blocks are transmitted at one time, the time diversity cannot be well utilized, so it will affect the performance of HARQ

Method used

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  • Method and system for transmitting data
  • Method and system for transmitting data
  • Method and system for transmitting data

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific implementation methods and accompanying drawings.

[0035] The core content of the present invention is: to transmit the data unevenly, that is, for the data with multiple code blocks, the code blocks that are earlier in time are collectively and continuously transmitted or transmitted with a set time interval.

[0036] As shown in Figure 2, it is a preferred data transmission system of the present invention, mainly including a sender 21 and a receiver 22, the sender 21 can be a user terminal, and the receiver 22 is a base station; the sender 21 can also be a base station , the receiver 22 is a user terminal. The sender 21 mainly includes an encoding module 211, a grouping module 212, a time setting module 213 and a sending module 214 connected in sequence, and also includes an ACK / N...

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Abstract

The invention is concerned with the data transmission method and the system, it is: the user's terminal or the base station as the sending side, the corresponding base station or the user's terminal as the receiving side, the sending side process code for the information bit in order to get the code block number equal with the biggest resend time, the sending side divides the code block number into at least two groups, and at least the first group includes two code block; sets the transmission time slot of each code block in the group, and sends to the receiving side; the receiving side receives code block and decode, after receiving a group of code block, if the decode is still incorrect, feedbacks once NACK. The invention can reduce the feedback signaling overhead effectively, improve the utilance of the channel resource.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to adaptive wireless transmission technology in the field of wireless communication. Background technique [0002] With the increasing demand for high-speed multimedia data services, wireless communication requires wider frequency band resources to meet the transmission of broadband data services, and the limited utilization of frequency bands has become a bottleneck restricting the development of broadband data services. How to maximize the data transmission rate, that is, how to maximize the frequency band utilization efficiency has become one of the key links of the third generation mobile communication and future communication systems. At the same time, the demand for high-speed multimedia services has prompted the wireless mobile communication system to adopt new technologies to increase the transmission rate and system capacity. [0003] The actual wireless communication c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/00
Inventor 刘德平
Owner HUAWEI TECH CO LTD
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