A data wireless secure transmission method based on a physical layer network coding relay model
A network coding and wireless security technology, applied in the field of data transmission, can solve problems such as unusable idle time slots, waste of time slot resources, and reduced communication efficiency, and achieve the effect of reducing the complexity and cost of implementation, and reducing the cost of synchronization
Inactive Publication Date: 2019-05-07
XIDIAN UNIV
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Problems solved by technology
Although the physical layer network coding relay model has advantages over the traditional relay model, there are time slot fragments in the time slot process, which makes some idle time slots unusable, resulting in waste of time slot resources and reduced communication efficiency
In addition, when the physical layer network coding relay model is implemented, the synchronization between nodes often needs to use an additional synchronization clock source, resulting in high complexity and cost of implementation
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] refer to figure 1 , the existing physical layer network coding relay model includes a relay node R and two communication nodes A and B. During the communication process, nodes A and B communicate with each other through the relay node R. In order to avoid interference to the relay node R, nodes A and B must send data packets in different time slots respectively. After the relay node R receives the data packets from nodes A and B in different time slots, it performs XOR operation on them and then broadcasts them. After nodes A and B receive the relay broadcast data packet, they perform an XOR operation on their own data packet and the relay broadcast data packet to obtain the other party's data packet. It can be seen from the above process that nodes A and B need 3 time slots in total to complete a data packet exchange.
[0027] When time slot fragme...
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The invention discloses a data wireless secure transmission method based on a physical layer network coding relay model, and mainly solves the problems that the communication efficiency is reduced andnode synchronization is difficult to realize due to time slot waste in an existing model. The implementation scheme is as follows: 1) a relay node broadcasts a data packet; 2) other nodes determine the sending sequence of themselves and decode the data packets according to the received data packets to obtain the data of the opposite side; 3) the first sending node sends a communication data packet, and the relay node performs corresponding operation according to the condition of receiving the data packet; 4) the post-sending node sends the communication data packet, and the relay node performs corresponding operation according to the condition of receiving the data packet; According to the method, time slot waste is reduced by changing time slot distribution, communication efficiency is improved, implementation complexity and cost are reduced, and the method can be used for efficient and safe transmission of a physical layer network coding relay model.
Description
technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a data transmission method, which can be used for high-efficiency and safe transmission of a physical layer network coding relay model. Background technique [0002] The integration of physical layer network coding and wireless relay technology has attracted widespread attention. In wireless cooperative relay technology, in order to obtain diversity gain, the source node needs to send multiple signal copies of the same information together with the cooperative relay; while in physical layer network coding technology, the intermediate node also needs to process the received information to Get network performance improvements. Therefore, it is found by comparison that the advantages of the two can complement each other, making the integration of these two technologies inevitable. Taking the two-way wireless relay transmission scenario as an example, node A and n...
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Login to View More IPC IPC(8): H04B7/155H04L1/00H04W28/06
Inventor 宫丰奎王加栋高洋李果
Owner XIDIAN UNIV