Communication system and method with joint frequency domain repetition and hybrid automatic retransmission
A hybrid automatic retransmission and communication system technology, applied in transmission systems, digital transmission systems, error prevention/detection using return channels, etc., can solve the problem of packet retransmission and retransmission delay that cannot meet communication requirements and cannot be guaranteed. User's medium-speed or high-speed service transmission quality and other issues, to achieve the effect of reducing transmission delay, realizing frequency domain resource allocation and time domain hybrid automatic retransmission
Inactive Publication Date: 2012-02-01
SHANGHAI RES CENT FOR WIRELESS COMM
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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
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[0016] see figure 1 , The communication system with joint frequency domain repetition and hybrid automatic repeat transmission of the present invention at least includes: a receiving end, a joint frequency domain repetition and hybrid automatic repeat transmission control module and a transmitting end.
[0017] The receiving end is used to receive the sent communication signal, and analyze and process the communication signal to obtain communication channel quality estimation information and signal-to-interference-noise ratio information of a plurality of preset frequency resource blocks, wherein the communication signal The analysis and processing of the communication signal refers to the channel quality estimation, demodulation and decoding, etc., usually including the channel and channel quality estimation module, the first baseband signal processing module, the likelihood ratio calculation module, the repeated combination module, the hybrid automatic retransmission (HARQ) ...
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A communication system and method with joint frequency domain repetition and hybrid automatic retransmission, which first receives a communication signal by a receiving end, and analyzes and processes the communication signal to obtain channel quality estimation information and the corresponding The signal-to-interference and noise ratio information of the resource block, and then determine the modulation and coding format and the number of retransmissions according to the channel quality estimation information and the signal-to-interference and noise ratio information of each resource block, and the last sending end according to the determined modulation and coding format and the number of retransmissions, the communication signals to be transmitted are coded and modulated and sent after the corresponding number of joint frequency domain repetition and mixing, which can effectively reduce the transmission delay of the air interface, and can jointly optimize the number of repetitions based on the quality of service requirements. Realize frequency domain resource allocation and time domain hybrid automatic retransmission, and also support packet scheduling based on channel quality.
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...
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IPC IPC(8): H04L1/18H04L1/00
Inventor 徐景王骞王海峰
Owner SHANGHAI RES CENT FOR WIRELESS COMM