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Network coding-based wireless cooperative broadcasting/multicasting method

A network coding, multicast technology, applied in broadcast service distribution, error prevention/detection through diversity reception, error prevention/detection using return channel, etc., can solve routing, topology control error/retransmission control and transmission Rate/power control cannot provide a satisfactory solution, radio resources cannot be fully utilized, and multicast performance cannot be guaranteed, achieving the effects of low power consumption, high received signal power, and improved retransmission efficiency

Inactive Publication Date: 2011-05-25
PLA UNIV OF SCI & TECH
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Problems solved by technology

[0003] The biggest problem faced by wireless broadcast / multicast is the inhomogeneity and volatility of the channel state of each node, the throughput is limited by the worst link node, wireless resources cannot be fully utilized, and the performance of multicast cannot be guaranteed. Existing broadcast / multicast protocols cannot provide satisfactory solutions in terms of routing selection, topology control, error / retransmission control, transmission rate / power control, etc.

Method used

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  • Network coding-based wireless cooperative broadcasting/multicasting method
  • Network coding-based wireless cooperative broadcasting/multicasting method
  • Network coding-based wireless cooperative broadcasting/multicasting method

Examples

Experimental program
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Embodiment 1

[0062] The first stage, the data source sending data packet stage, includes the following steps:

[0063] Step 1.1, there are 6 users in the system, each user sends an online request to the data source when starting up, and the data source sends the online confirmation message with the user number to the user after receiving the user's online request, and the user number is the data source according to the user The sequence of going online, numbered from 1 to 6,

[0064] Step 1.2, the data source sends a start beacon signal with a parameter of 10 data packets to be sent, and all users detect the start beacon signal,

[0065] Step 1.3, the data source continuously sends 10 data packets, where the information bits are: 100001, 100010, 100011, 100100, 100101, 100110, 100111, 101000, 101001, 101010, and all users start to receive data packets, which contain Data packet serial number information; the second stage, in cooperation with user selection, designation request and network...

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Abstract

The invention discloses a network coding-based wireless cooperative broadcasting / multicasting method. In the method, a network coding data packet for retransmission is formed by combining and constructing data packets lost by a user in a network coding mode, and a cooperative user assists a user who fails to correctly receive all data packets at a first phase in receiving all data packets. The method is implemented by the following steps of: transmitting data packets by using a data source; selecting the cooperative user and specifying a request and performing network coding configuration; and transmitting network coding data packets in a cooperative way. A retransmission network coding data packet is constructed through network coding and user cooperation, so that retransmission times can be greatly reduced and system efficiency is improved.

Description

technical field [0001] The invention relates to a cooperative transmission of broadcast / multicast services in a wireless network, provides a coordinated broadcast / multicast scheduling method based on network coding, cooperative communication and space diversity technology, and belongs to the technical field of wireless communication. Background technique [0002] Wireless broadcast / multicast technology is an efficient mechanism for one-to-many data transmission in a wireless environment. It provides a broad wireless platform for TV, radio, film and other application suppliers, and has attracted widespread attention. The broadcast / multicast mode is a point-to-multipoint data service, and a single data stream is received by multiple users, which is especially suitable for live broadcast services such as TV programs and live event broadcasts. At present, the mobile TV service in which users watch TV programs on mobile terminals is gradually becoming popular on a large scale. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/06H04W4/06
Inventor 余江徐友云谢威宋留斌田辉
Owner PLA UNIV OF SCI & TECH
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