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Network coding method of hybrid automatic request retransmission for long-term evolution system

A hybrid automatic retransmission, long-term evolution system technology, applied in transmission systems, digital transmission systems, error prevention/detection using return channels, etc., can solve problems such as multiple time-frequency resources and low work robustness

Inactive Publication Date: 2012-02-15
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

[0017] To sum up, the retransmission in the prior art occupies more time-frequency resources, and the work robustness performance is low

Method used

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  • Network coding method of hybrid automatic request retransmission for long-term evolution system
  • Network coding method of hybrid automatic request retransmission for long-term evolution system
  • Network coding method of hybrid automatic request retransmission for long-term evolution system

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Embodiment Construction

[0046]Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0047] like Figure 2-3 As shown, the network coding method suitable for the hybrid automatic repeat request of the long-term evolution system, the specific steps are as follows:

[0048] First, the hybrid automatic repeat request technology is adopted in the downlink shared channel of the long-term evolution system. The maximum number of transmissions is 4, and a single process P at the sending end processes 2 transmission blocks TB at the same time. 1 and TB 2 , each ...

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Abstract

The invention discloses a network coding method of hybrid automatic request retransmission for a long-term evolution system. Two adjacent transmission blocks are selectively subjected to network coding by a transmitting end according to transmission results of two adjacent transmission blocks; coding results are retransmitted; retransmission of two transmission blocks can be finished in a transmission process; and thus, time-frequency resource occupied during retransmission of the transmission blocks can be obviously reduced and transmission passing rate can be increased under the condition of not nearly damaging transmission performance of the two transmission blocks. When the received transmission block is in a retransmission state, only a coding block which is not temporarily or correctly decoded in a previous transmission process is decoded, the coding block which has been correctly decoded in the previous transmission process is ignored, and the decoder resource can be greatly saved.

Description

technical field [0001] The invention relates to a network coding method suitable for hybrid automatic retransmission requests of long-term evolution systems, belonging to the technical field of digital communication data link layers in communication and information systems. Background technique [0002] 1. Existing technology of the physical layer transport block of the LTE (3GPP Long Term Evolution, long-term evolution) system [0003] The data service in LTE (3GPP Long Term Evolution, Long Term Evolution) uses a topological coding scheme. The data arrives at the coding unit in the form of a transmission block, and a transmission block is obtained in each transmission time interval (TTI). In the space division multiplexing mode, it can Send two transport blocks at the same time. The longer the code length of the topological code, the closer the code word is to the random code, the better the performance, but the higher the complexity of the codec implementation, the less s...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/00
Inventor 姜明赵欢赵春明张华黄鹤
Owner SOUTHEAST UNIV
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