Relay selection method based on threshold and maximum safe capacity

A security capacity and threshold technology, which is applied in the field of wireless communication, can solve the problems of no guarantee of communication security transmission, high signal-to-noise ratio received by eavesdroppers, etc., to achieve both channel security and reliability, ensure security, and ensure reliability Effect
CN105142199AActive Publication Date: 2015-12-09YANGZHOU UNIV
5 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
YANGZHOU UNIV
Publication Date
2015-12-09

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a relay selection method based on a threshold and maximum safe capacity criterion. According to the relay selection method, a signal source node S transmits signals to relay nodes, and the signals are forwarded to a target node D; then a set of relay nodes corresponding to the target node D with received signal-to-noise ratios which are more than a fixed signal-to-noise ratio threshold value when the signals are transmitted through a main link (S to Rk to D) is selected; an eavesdropper E also can receive the signals which are amplified and forwarded by the relay nodes; the corresponding received signal-to-noise ratio of the eavesdropper E is obtained in the candidate relay node set; the safe capacity of a whole communication system is obtained by using the received signal-to-noise ratios of the target node D and the eavesdropper E; and the relay with the maximum safe capacity is selected from the candidate relay node set. The relay selection method overcomes respective defects of two previous methods. According to the relay selection method, the communication reliability of the main link and the safety of the whole communication system are ensured, the optimum performance of the multi-relay system is played, and both the safety and reliability of the channel are covered.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a cooperative relay system with eavesdroppers, belonging to the technical field of wireless communication, in particular to a relay selection method based on a threshold and maximizing security capacity. Background technique

[0002] In recent years, with the rapid development of global mobile wireless communication technology, people will have higher and higher requirements for wireless communication transmission performance indicators. However, due to the fading caused by the multipath transmission of wireless signals, the Doppler frequency shift caused by the fast movement of the mobile station, and the interference between multiple users caused by simultaneous communication of multiple users, the future broadband wireless communication system is limited. Effective improvement of transmission rate and reliability. The emergence of cooperative relay technology can improve the transmission performance of wireless communicatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More