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Energy efficiency-based secure transmission method in cache-assisted multi-relay transmission system

A transmission system and secure transmission technology, applied in the field of secure transmission based on energy efficiency, can solve problems such as inability to guarantee, and achieve the effect of improving transmission efficiency, transmission security and energy efficiency

Active Publication Date: 2019-10-25
XI AN JIAOTONG UNIV
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Problems solved by technology

The traditional relay has certain limitations. Since the relay only has the function of data forwarding, the selected relay will send the data in the next time slot after receiving the data from the source node in the previous time slot. To the receiving node, there is no guarantee that the two links between the selected relay and the sending node and the receiving node are optimal

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  • Energy efficiency-based secure transmission method in cache-assisted multi-relay transmission system
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  • Energy efficiency-based secure transmission method in cache-assisted multi-relay transmission system

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0043] refer to figure 1 , the system model diagram of the present invention is specifically described as follows:

[0044] In the cache-assisted multi-relay two-hop communication system, the system model includes a sending node A and N relay nodes R equipped with cache devices j(1≤j≤N), a legal receiving node B and an eavesdropping node E. All nodes are configured with a single antenna. The relay works in half-duplex mode and adopts the decoding and forwarding protocol. The relay is equipped with a buffer so that it can store received data into the buffer. Since A and B are far apart, assuming that there is no direct communication link between A and B, all data transmission must go through the relay. Each transmission takes up one slot and only one data packet is transmitted. In addition, there is an eavesdropper E in the system. Assume that the location of th...

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Abstract

The invention discloses an energy efficiency-based secure transmission method in a cache-assisted multi-relay transmission system. The method comprises the following steps: firstly, RS encoding is performed on a data packet, wherein the transmission process comprises two stages, in the first stage, a sending node sends all coding packets to relays, each time slot selects one relay as a receiving end according to channel state information of all relays, and sending power is adjusted according to the channel state of the selected relay, so that the probability of receiving by an eavesdropper isreduced, and the energy efficiency of transmission is improved; and, in the second stage, the relay sends an encoding packet to the receiving node, one relay is selected as a sending end in each timeslot according to the channel state between the relay and the receiving node, and the instantaneous sending power is adjusted. According to the method, the data decoding probability of the eavesdropping node can be effectively reduced, and relatively high energy transmission efficiency is realized.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a secure transmission method based on energy efficiency in a cache-assisted multi-relay transmission system. Background technique [0002] In the next generation of mobile communication, it is necessary to provide higher transmission rate and larger system capacity. In fact, the existing 4G network is a heterogeneous network, and many fixed relays and other types of wireless access points have been deployed in the 4G system. In LTE-A systems with heterogeneous topologies, cooperative communication is widely used, providing greater system throughput and higher edge transmission rates. The research on cooperative communication originated from the relay technology. By setting up a relay between the sending node and the receiving node with a poor channel, the data transmission can be assisted by the relay, so as to improve the channel quality and expand the transmis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/12H04W40/22H04W52/24H04W52/46
CPCH04W40/12H04W40/22H04W52/24H04W52/46Y02D30/70
Inventor 杜清河许莹
Owner XI AN JIAOTONG UNIV
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