Transmitting terminal radio retransmission method and system based on network code

A technology of network coding and transmitting end, which is applied in the field of broadcast retransmission method and system at the transmitting end, to achieve the effect of reducing network packet loss rate, reducing transmission times, and improving network transmission efficiency

Inactive Publication Date: 2012-07-18
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

On the contrary, network coding is a technology that achieves multicast network capacity by encoding and decoding information through routing relay nodes. This technology was first proposed by R.Ahlswede et al. in 2000. It is theoretically proved that network coding can achieve the maximum information flow in the network, which is impossible for traditional store-and-forward routing technology

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  • Transmitting terminal radio retransmission method and system based on network code
  • Transmitting terminal radio retransmission method and system based on network code
  • Transmitting terminal radio retransmission method and system based on network code

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below with reference to specific embodiments.

[0026] The technical scheme of the present invention is: provide a kind of broadcast retransmission method based on network coding at the transmitting end, comprising the following steps:

[0027] Step 100: Construct a retransmission buffer pool, that is, construct a retransmission buffer pool matrix, the row data of the retransmission buffer pool matrix indicates the reception status of the receiving node, and the column data of the retransmission buffer pool matrix indicates the reception of data packets Happening.

[0028] The specific implementation process is as follows: the retransmission buffer pool M refers to the data packet reception status matrix generated by ACK / NAKs feedback during broadcast transmission. The rows in the matrix represent the receiving status of the receiving node, and the columns represent the receiving status of the i...

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Abstract

The invention relates to a transmitting terminal radio retransmission method and a system based on a network code. The transmitting terminal radio retransmission method comprises the following steps: constructing a retransmission buffer pool, initializing the retransmission buffer pool and combining a retransmission data packet; and then transmitting the retransmission data packet to reduce the transmission frequency and improve the energy efficiency. The transmitting terminal radio retransmission method and system has the beneficial effects that when the data volume is larger, the network delay is reduced, the network transmission efficiency is improved, the network packet loss rate is reduced, the transmission reliability is increased; and the maximum network information flow can be achieved.

Description

technical field [0001] The present invention relates to a broadcast retransmission method and system, in particular to a broadcast retransmission method and system at a transmitter based on network coding. Background technique [0002] At present, most of the traditional point-to-point communication networks adopt the routing strategy of store and forward, such as Internet network, wireless ad hoc network and so on. On the contrary, network coding is a technology that achieves multicast network capacity by encoding and decoding information through routing relay nodes. This technology was first proposed by R.Ahlswede et al. in 2000. It is theoretically proved that network coding can achieve the maximum information flow in the network, which cannot be realized by traditional store-and-forward routing technology. In the traditional data transmission technology, the relay node is only responsible for the storage and forwarding of data, while the relay node of the network based ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/00H04L1/18
Inventor 张钦宇王亚松李云鹤
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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