A stochastic cooperative communication method based on geometrical probability method

A technology of geometric probability and cooperative communication, applied in wireless communication, digital transmission system, electrical components, etc., can solve problems such as inability to apply relay or cooperative communication system

Inactive Publication Date: 2018-12-21
NORTHWESTERN POLYTECHNICAL UNIV
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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 theoreti

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  • A stochastic cooperative communication method based on geometrical probability method
  • A stochastic cooperative communication method based on geometrical probability method
  • A stochastic cooperative communication method based on geometrical probability method

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Embodiment Construction

[0144] The present invention provides a stochastic cooperative communication method based on geometric probability method, called statistical cooperative communications based on geometric probability (SCCGP), which has low complexity and system overhead, and can be statistically Guaranteed system transmission capacity.

[0145]In SCCGP, the base station randomly selects a certain number of relay nodes with fixed amplification factors and selectively combines them. By using a geometric probability method based on the Cassini model, distribution functions of the average received SNR and user capacity can be explicitly derived. The number of random relay nodes to guarantee an optimal number of connection probabilities is also derived. At the same time, the SCCGP model is extended to the wireless ad hoc network, a random number of relay nodes is selected in the circular area of ​​the transmitter and receiver, and the optimal number of relay nodes is determined by the derived capa...

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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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Application Information

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IPC IPC(8): H04W24/02H04W40/22H04W84/18H04L12/24
CPCH04L41/145H04W24/02H04W40/22H04W84/18
Inventor 张若南周德云王佳欣李淼
Owner NORTHWESTERN POLYTECHNICAL UNIV
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