Reed-solomon (RS) encoding-based radio broadcast transmission optimization method

Abstract

The invention discloses a Reed-Solomon (RS) encoding-based radio broadcast transmission optimization method. According to the method, in a MANET-based mobile streaming media system, the Reed-Solomon coding is adopted and the recovery is realized based on the Reed-Solomon coding by utilizing redundant data blocks. In this way, the radio broadcast transmission is optimized. Firstly, original data blocks are divided according to block sizes. After that, the original data blocks are encoded and the encoded data blocks are transmitted to the outside in the broadcast manner. The encoded data blocks are received by data solicited nodes, broadcast monitoring nodes and intermediate forwarding nodes and then are decoded. In this way, reduced original data blocks can be obtained. The above method is simple in calculation, and strong in universality and expansibility. Meanwhile, both the encoding algorithm and the decoding algorithm are in the form of the exclusive-or operation, so that only a little encoding / decoding time is consumed. Therefore, the success rate of the radio broadcast transmission is greatly improved, and the method can be applied to any data recovery scenario.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for optimizing wireless broadcast transmission based on RS coding. Background technique [0002] With the rapid development of mobile terminal equipment represented by smart phones and wireless communication technology and the gradual popularization of WiFi and 4G networks, the rise and vigorous development of the emerging industry of mobile Internet has been promoted, and the information society has gradually entered the era of mobile Internet. . [0003] Currently, the networks used by mobile Internet application services include 2G, 3G, 4G and WiFi. The disadvantage of the mobile communication network is that it is limited by the network bandwidth. For example, the network transmission speed of 2G and 3G is relatively slow, and users need to pay relatively expensive traffic fees to the operator for the data traffic generated by network access. Whether it is a m...

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Problems solved by technology

However, wireless broadcasting does not have this mechanism. It only monitors that the channel is not occupied, and then sends it out, regardless of whether the data is reachable, so collisions with hidden terminals often occur, resulting in its transmission effect being inferior to unicast.

For end users, the mobile phone can support the Adhoc mode by modifying the parameters of the network card, so that a P2P wireless local area network can be formed between the mobile phone and the mobile phone. When the mobile phone uses wireless broadcasting for video data transmission, although it can reduce the local data transmission overhead, But its transmission performance is not as good as unicast

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