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Queue cache relay transmission method in physical layer safety communication

A technology of physical layer security and transmission method, which is applied in the field of queue buffer relay transmission, can solve the problem of time synchronization of multiple cooperative relays, which is not easy to implement, is not conducive to extracting the space diversity of cooperative relay communication systems, and the complexity of feedback channel design advanced questions

Active Publication Date: 2016-03-02
XIDIAN UNIV
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Problems solved by technology

The disadvantages of this technical solution are: firstly, this method adopts the method of iterative recombination to select two modes of relay amplification and forwarding and noise forwarding, and its computational complexity is relatively high; secondly, multiple relays are selected in the cooperative transmission stage, Its power overhead is large, and the time synchronization of multiple cooperative relays is not easy to implement
The shortcomings of this technical solution are: firstly, the design of the beamforming weight vector of this method requires the transmitting node to grasp the instantaneous channel state information, and the design complexity of the feedback channel is relatively high; secondly, this method fixes the two time slots of the relay node transmission mode that is not conducive to maximizing the extraction of space diversity in cooperative relay communication systems

Method used

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  • Queue cache relay transmission method in physical layer safety communication
  • Queue cache relay transmission method in physical layer safety communication
  • Queue cache relay transmission method in physical layer safety communication

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Embodiment Construction

[0067] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution, and provides detailed implementation and specific operation process, but the protection scope of the present invention is not limited to the present invention. Example.

[0068] Such as figure 1 As shown, the queue cache relay system model diagram of the present invention consists of source node S, destination node D, eavesdropping node E and K relay nodes R k , k∈{1,...,K} constitutes.

[0069] Such as figure 2 Shown, the realization steps of the present invention are as follows:

[0070] S1 initializes the cache queue of the relay node.

[0071] 1.1) At the beginning of transmission, set the buffer queues of all relay nodes to zero;

[0072] 1.2) Use the function 0≤Φ(Q k )≤L means cache Q k The amount of data stored, and the cache Q k The data packets in obey the "first in first out" r...

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Abstract

The invention discloses a queue cache relay transmission method in physical layer safety communication, and mainly aims at solving the problems of low transmission reliability, low safety and high complexity in the prior art. The method comprises the steps that 1) a cache queue of relay nodes is initialized; 2) a source node transmits local data, a target node transmits interference data, and all relay and eavesdropping nodes receive the data; 3) the relay nodes transmit the local data, the source node transmits interference data, and the target and eavesdropping nodes receive data; 4) an optimal relay transmission link in the queue cache is selected; and 5) the optimal relay node broadcasts and transmits signaling to the source and target nodes, and starts transmission. The method has the advantages of low complexity, high safety and high transmission reliability, and can be applied to a physical layer safety relay coordinated communication system.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a queue buffer relay transmission method used in physical layer security communication, which can be used for confidential transmission of communication information. Background technique [0002] With the development of wireless communication technology, the security and privacy of information transmission has become a research hotspot in the field of wireless communication and information security. In traditional networks, security is guaranteed through high-level encryption mechanisms, but this is usually based on the assumption that nodes have limited computing power, and the generation and interaction of keys will bring additional complexity and information to the system. order overhead. Based on the viewpoint of information theory, physical layer security technology ensures the security and privacy of information transmission by making reasonable use of the physical ch...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B7/155H04K3/00
Inventor 吕璐陈健王平阔永红杨龙
Owner XIDIAN UNIV
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