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Receiver unit and receiving method

A technology of receiving device and receiving part, which is applied in digital transmission system, use of forward error control, error prevention, etc., can solve the problems of long processing delay and increased processing load, etc.

Inactive Publication Date: 2004-07-28
OPTIS WIRELESS TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is impossible to acknowledge the control data until the receiving side performs decoding processing, which causes problems of increased processing load and longer processing delay

Method used

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  • Receiver unit and receiving method
  • Receiver unit and receiving method

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Experimental program
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Effect test

Embodiment

[0020] figure 1 is a diagram illustrating a rough structure of a data transmission system according to an embodiment of the present invention. As illustrated in this figure, the sending device 100 is connected to the receiving device 200 via a bidirectional transmission path. The transmitting device 100 generates a packet to which a protocol header is attached, and transmits the generated packet to the receiving device 200 . Note that the packet is an example of a data transmission unit, and it is possible to refer to a frame, a superframe, etc. as other data transmission units.

[0021] The reception device 200 receives a packet transmitted by the transmission device 100, and performs demodulation and error correction decoding processing, and further performs error detection processing on the decoded output. In the event that the output in the error detection fails to detect an error, the receiving apparatus 200 transmits a reception acknowledgment signal (positive acknowle...

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Abstract

Receiving a packet interleaved with an interleave pattern corresponding to the number of times of retransmission, reception apparatus (200) de-interleaves a pilot sequence contained in the packet with de-interleavers (205-1~205-N). Correlators (206-1~206-N) performs correlation calculation between the de-interleaved pilot sequence and a pilot pattern held in the reception apparatus. Maximum value detection section (207) detects the maximum correlation value among the correlation values to detect the number of times of retransmission. Decision section (209) controls combination circuit (213) and error detection section (217) based on the number of times of retransmission stored in storage section (208) and on the number of times of retransmission detected at maximum value detection section (207). This allows a decrease in throughput to be prevented from occurring even in a case where a reception side receives a packet which is different from one which is requested by the reception side.

Description

technical field [0001] The present invention relates to a receiving apparatus and receiving method for performing error control by issuing an automatic repeat request in data transmission. Background technique [0002] In wireless communication, an error control technique for correcting an error that cannot be recovered by an equalization technique or a diversity technique or the like is commonly used to realize high-quality transmission. One of such error control techniques is an automatic repeat request (ARQ: hereinafter referred to as "ARQ"). [0003] In the ARQ, in which a sender and a receiver are connected via a bidirectional transmission path, the sender sends to the receiver a packet containing a codeword generated by performing an error detection coding process on information bits, and the receiver then performs a Error detection. In the case where no error is detected in the received data, the receiving side returns a reception acknowledgment signal to notify tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/12H04L1/16H04L1/18
CPCH04L1/1819H04L1/16H04L1/0071H04L1/0043H04L2001/125H04L1/1845H04L1/0052
Inventor 松元淳志二木贞树三好宪一
Owner OPTIS WIRELESS TECH LLC
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