A stochastic cooperative communication method based on geometrical probability method

Abstract

The invention discloses a random cooperative communication method based on a geometrical probability method. The SCCGP model in a cellular network is proposed, and the definition of end-to-end path loss and system capacity is given. The distance loss of two random relay channels is deduced, and the approximate cumulative distribution function of the random distance distribution is simplified. Thenthe capacity of random cooperative communication in SCCGP mechanism is deduced, and the probability density function of user capacity interruption is deduced. At the same time, the calculation methodof the minimum number of relay nodes required to satisfy certain connection requirements is proposed. The SCCGP model is extended to wireless ad hoc networks. By using one or more relay nodes, the cumulative distance distribution function of two random relay paths is derived, and the cumulative distribution function of user capacity in stochastic cooperative communication is obtained. In the SCCGP model proposed by the invention, the theoretical analysis model and the derivation of the system capacity distribution are all based on any number of relay paths, and the SCCGP model has universality.

Description

technical field [0001] The invention belongs to the technical field of cooperative communication, and in particular relates to a random cooperative communication method based on a geometric probability method. Background technique [0002] There are two main methods of selecting and coordinating relay nodes: [0003] 1) Node selection based on instantaneous CSI [0004] In cooperative communication systems, most of the work is based on instantaneous CSI for relay node selection. According to the instantaneous CSI, select an optimal relay node to assist the source node and the destination node to communicate. Currently, there are two selection strategies, namely [0005] [0006] [0007] where h s,n and h n,d Respectively represent the channel fading coefficients of the link from the source node to the relay node, and the link from the relay node to the destination node. The second strategy is also called node selection based on the harmonic mean criterion. [00...

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Problems solved by technology

[0018] 2) The existing research and analysis of the cellular network model has provided the important points of geographical correlation characteristics in wireless networks and the theoretical basis for performance evaluation and system size. However, these studies are only based on point-to-point link research and cannot be applied In relay or cooperative communication system

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