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Energy efficient distributed relay selection algorithm in wireless cooperative relay network

A cooperative relay and network technology, applied in the field of wireless communication, can solve the problems of not considering effective energy saving consumption, not applicable to actual networks, and relay nodes not using adaptive modulation and coding, so as to avoid the effect of noise amplification

Inactive Publication Date: 2014-07-30
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, due to the random time-varying characteristics of mobile wireless channels, this channel changeless assumption is often not applicable to practical networks, and the relay selected according to the current channel state is not optimal for the next data frame the relay
In addition, these methods do not consider the consumption of effective energy saving, and the relay nodes do not adopt adaptive modulation and coding (AMC)

Method used

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  • Energy efficient distributed relay selection algorithm in wireless cooperative relay network
  • Energy efficient distributed relay selection algorithm in wireless cooperative relay network
  • Energy efficient distributed relay selection algorithm in wireless cooperative relay network

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Embodiment Construction

[0014] In order to clearly illustrate the solutions of the present application, the exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0015] First, refer to figure 1 Introduce distributed cooperative relay networks.

[0016] In this application, consider a peer-to-peer distributed cooperative relay network, each node in the network has the ability to forward (relay) data packets for other nodes, and its network model is as follows figure 1 shown. In cooperative relay communication, the transmission process of each frame of data can be divided into two sub-slots: in the first sub-slot, the source node sends a data frame to the destination node, and the destination node and the relay node receive data at the same time; the second sub-slot sub-slots, the relay node forwards the data frame, and the destination node combines the data frame from the source node in the first sub-slot and the same data f...

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Abstract

The invention provides an energy efficient distributed relay option algorithm in a wireless cooperative relay network. The relay network comprises a source node, a target node and a plurality of relay nodes. A method for selecting relay nodes comprises the following steps of: respectively determining the channel states and the energy states of all relay nodes at any time slot according to channel state models and energy state models of the plurality of relay nodes; calculating the system rewards of each relay node through a preset system reward model on the basis of the channel states and the energy states; and selecting a relay node for each time slot, wherein the selected relay nodes ensure that the obtained system reward in the whole data transmission process is maximized.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular, to an energy-efficient distributed relay selection method in a wireless cooperative relay network. Background technique [0002] As an effective technology to reduce the adverse effects of multipath fading (multipath fading), the spatial diversity technology is generally favored by the industry. By forming virtual antenna arrays (virtual antenna arrays), a wireless cooperative relay with distributed spatial diversity gain is obtained. (cooperative relaying) network is also proposed. [0003] In a wireless cooperative relay network, the node that senses the information sent by the source node to the destination node does not regard the sensed information as interference, but forwards (relays) the information to the destination node, and the destination node receives the information accordingly. To a plurality of independently faded messages from the sou...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04L1/06
CPCY02B60/50Y02D30/70
Inventor 宋梅魏翼飞于非张勇戴超王莉满毅侯春萍冯瑞军
Owner BEIJING UNIV OF POSTS & TELECOMM
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