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HARQ retransmission and blind detection method

A technology of blind detection and maximum number of retransmissions, applied in the direction of using the return channel for error prevention/detection, transmission system, digital transmission system, etc., can solve the problems of loss retransmission combining diversity gain and so on

Inactive Publication Date: 2014-06-18
POTEVIO INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above problems can be avoided in this way, the diversity gain of retransmission combining will be lost

Method used

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  • HARQ retransmission and blind detection method

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Embodiment Construction

[0032] This application provides a HARQ retransmission and blind detection method, the basic idea of ​​which is: the sending end waits for an acknowledgment (ACK) or negative acknowledgment (NACK) after sending each data packet; if the ACK is received, the sending end Send the next new data packet; if NACK is received and the maximum number of retransmissions is not exceeded, the sender retransmits using the Chase mechanism, that is, the sender resends the same data packet each time, and uses the same modulation and coding method. During data transmission, there is no signaling notifying the receiving end of the indication of new and old data, nor is there any signaling notifying the receiving end of the maximum number of retransmissions. The receiving end performs blind HARQ combination detection on a specific channel transmission format.

[0033] The HARQ retransmission mechanism provided in this application ensures that the retransmitted data is completely repeated data. By...

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Abstract

The application discloses an HARQ retransmission and blind detection method. A transmitting end waits for a positive acknowledgement (ACK) or a negative acknowledgement (NACK) every time after transmitting a data packet; if an ACK is received, the transmitting end transmits the next new data packet; and if an NACK is received without exceeding a maximum number of times of retransmission, the transmitting end adopts a Chase mechanism for retransmission, i.e., the transmitting end retransmits the same data packet every time, and adopts the same modulation coding mode. In a period of data transmission, no signaling including indication of new and old data is notified to a receiving end, and no signaling including the maximum number of times of retransmission is notified to the receiving end. The receiving end performs blind HARQ merging detection on a specific channel transmission format. By applying the technical scheme of the application, extra signaling support is not needed, and the purpose of improving performance of the specific channel transmission format can be achieved.

Description

technical field [0001] The present application relates to the technical field of mobile communication, in particular to Hybrid Automatic Repeat Request (HARQ) technology, and in particular to a HARQ retransmission and blind detection method. Background technique [0002] In mobile communication, with the continuous expansion of communication services and the improvement of service quality, higher requirements will be put forward for the reliability of communication. However, in a mobile communication system, a wireless channel is a channel whose parameters change frequently, and its environment is also very complex. For the receiving end, the bit errors caused by channel fading and various interferences include random errors and burst errors, which will seriously damage the communication quality. Therefore, in the mobile communication system, error control technology must be used to improve the transmission quality of the signal, so as to ensure the reliable transmission of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L1/00
Inventor 王丽
Owner POTEVIO INFORMATION TECH CO LTD