Communication system and communication method with association frequency domain repetition and mixed automatic retransmission

Abstract

The invention discloses a communication system and a communication method provided with combined frequency domain repetition and mixed automatic retransmission. At first, one receiving end receives a communication signal, and makes an analysis treatment to the communication signal to obtain a channel quality estimation message and SINR messages of resource blocks that the communication signal corresponds to, then a modulation code format and retransmission times are determined according to the channel quality estimation message and the SINR messages of the resource blocks, finally a sending end makes a corresponding code modulation as well as combined frequency domain repetition and mixture with corresponding times to the communication signal to be transmitted according to the determined modulation code format and retransmission times, then the communication signal is sent. Thus, the transmission time delay of the air interface can be effectively decreased, the repetition times are jointly optimized based on the requirement of the service quality, the frequency domain resource allocation and the time-domain mixed automatic retransmission can be realized, and the packet schedule based on the quality of the channel can also be supported at the same time.

Description

technical field [0001] The invention relates to a communication system and a communication method with joint frequency domain repetition and hybrid automatic retransmission. Background technique [0002] In the Release-6 protocol, the hybrid automatic retransmission technology is used to compensate link errors within the time specified by the communication system. With the long-term evolution of 3GPP standards, higher requirements are put forward for user plane delay, that is, the one-way transmission delay from the radio access network or terminal IP layer to the terminal or radio access network should be lower than the Release-6 protocol The specified 5 milliseconds (ms). In order to achieve the above delay requirements, if the existing 0.5ms transmission interval is adopted, and the six-channel synchronous stop and wait protocol is adopted, when the maximum number of retransmissions reaches 4 times, the delay of information on the air interface is already 15ms, so the ex...

AI Technical Summary

Problems solved by technology

When the user is at the boundary of the cell, the channel cannot guarantee the transmission quality of the user's medium-speed or high-speed services, and the phenomenon of high-level packet retransmission is very easy to occur

[0003] To sum up, in the existing communication, on the one hand, there is a need for retransmission, and on the other hand, the time delay of the existing retransmission cannot meet the communication requirements. Therefore, how to solve the shortcomings of the existing technology has become a technical problem in the art. Technical issues to be solved urgently

Images