Full duplex scrambling transmission method in untrusted relay network

A technology of relay network and transmission method, which is applied to scramble the transmission of untrusted relays at the end. In the field of full-duplex scrambling transmission in untrusted relay networks, it can solve the problem that the system security capacity will not be too large. Problems such as improvement, inability to obtain system security capacity, impact on system security performance, etc.

Active Publication Date: 2017-07-28
HUAQIAO UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

However, when the relay is an untrusted relay, it has a great impact on the security performance of the system
When the untrusted relay uses the decoding and forwarding protocol to transmit, the relay node will receive more accurate information than the destination end, which wil...

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  • Full duplex scrambling transmission method in untrusted relay network
  • Full duplex scrambling transmission method in untrusted relay network
  • Full duplex scrambling transmission method in untrusted relay network

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Embodiment Construction

[0033] see figure 1As shown, a full-duplex scrambling transmission method in an untrusted relay network is applied in a wireless communication system including three nodes of a source S, a relay R and a destination D, where the relay is an untrusted Relay, the working protocol is the amplification and forwarding protocol. If the relay uses the decoding and forwarding method for transmission, the relay receives more accurate decoding information before the destination, and cannot obtain positive security capacity. Therefore, untrusted relays usually use amplification. Forward relay. When the relay is an untrusted relay, the relay is eavesdropping on the source information while receiving useful information from the source. Therefore, the present invention uses a method of sending artificial noise at the destination end to interfere with relay wiretapping. The destination is configured with two antennas and works in full-duplex mode, and the transceiver antenna is fixed, and t...

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Abstract

The invention discloses a full duplex scrambling transmission method in an untrusted relay network, which is applied to a wireless communication system including three nodes of an information source, a relay and a destination node, and the relay is an untrusted relay. The method comprises the following steps: in a first time slot, transmitting information to the relay and the destination node by the information source, and receiving information source information by the destination node and transmitting an interference signal to the relay; in a second time slot, amplifying the signal received in the first time slot by the relay by adopting an amplify-and-forward protocol, after that, forwarding the signal to the destination node; performing self-interference cancellation by the destination node according to estimated channel information, and performing maximal-ratio combining on information received in the first time slot and the second time slot; and calculating the instantaneous security capacity of the system according to the received signal to noise of the relay in the first time slot and the received signal to noise of the destination node in the two time slots. The method of the invention can not only make the information source send the information to the destination node efficiently, but also make the destination node effectively interfere with the relay node to receive useful information, so as to maximize the security capacity of the system.

Description

technical field [0001] The invention relates to the fields of wireless communication and physical layer security, in particular to a full-duplex scrambling transmission method in an untrusted relay network. The invention relates to the field of wireless communication physical layer security and cooperative communication, in particular to a transmission method based on full-duplex destination scrambling untrusted relay under cooperative interference. Background technique [0002] With the rapid development of network technology, the increasingly complex network structure makes the safe transmission of information more vulnerable to threats. Although methods such as high-level security protocols and encryption algorithms based on the key system can improve information security to a certain extent, they cannot overcome the adverse effects of the broadcast characteristics of wireless channels and rapidly increasing computing power on information security. Physical layer securit...

Claims

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Application Information

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IPC IPC(8): H04K3/00H04L5/14H04B1/525H04W72/04
CPCH04B1/525H04K3/825H04L5/14H04W72/0473
Inventor 赵睿谭星贺玉成聂志巧方嘉佳
Owner HUAQIAO UNIVERSITY
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