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Method for realizing shortest route based on receiver channel self-adapting

A receiver and self-adaptive technology, which is applied in communication between multiple stations, transmission control/equalization, etc., can solve problems such as not considering the state of the receiver, and not being able to effectively improve bandwidth utilization

Active Publication Date: 2007-08-22
SPREADTRUM COMM (SHANGHAI) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, these algorithms do not consider the state of the receiver, and cannot effectively improve bandwidth utilization

Method used

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  • Method for realizing shortest route based on receiver channel self-adapting
  • Method for realizing shortest route based on receiver channel self-adapting
  • Method for realizing shortest route based on receiver channel self-adapting

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Embodiment Construction

[0027] The first step is to analyze and model the channel:

[0028] In the adaptive modulation system, the signal-to-noise-to-interference ratio (SINR) of the channel has been quantified into several levels, and corresponds to a certain modulation method one-to-one. Therefore, the channel transition of the adaptive modulation system can use a multi-state Markov chain To represent. Figure 1 shows a channel model based on a multi-state Markov chain.

[0029] Under the Rayleigh channel, let A represent the signal-to-noise ratio of the received signal, and A is proportional to the square of the signal envelope. The probability density distribution of A is exponential and can be written as

[0030] P A ( a ) = 1 ρ exp { - a ρ } Here, ρ=E[A], a≥0 (1)

[0031] Let f m Represents t...

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Abstract

The invention provides a method for realizing shortest path route in mobile communication system based on the receiver channel self-adapting which comprises the steps of, the mobile station gathering the real-time information of the mobile communication network, the mobile station conducting quality assess to the channels between the other mobile stations and determining the modulation rate with other mobile stations, the mobile station calculating the channel quality factor of the link circuit between other mobile stations, and determining the link circuit cost of the link circuit between the mobile station X and mobile station Y, each of the mobile station maintaining a link circuit status matrix CSM, determining the shortest path from the mobile station to the destination node based on the chain circuit status matrix.

Description

Technical field [0001] The invention relates to a wireless system adopting an adaptive modulation technology, in particular to an implementation method of the shortest path routing in an ad hoc mobile network and a relay system. Background technique [0002] With the development of mobile communication technology and the popularization of Internet applications, future mobile communication systems hope to provide local and wide-area communication environments to meet people's needs for information access, computing and communication anytime and anywhere. [0003] Self-organizing (Ad hoc) mobile networks are convenient, fast, and not restricted by time and location. They can not only be used alone to meet the needs of people for direct communication, but also can be superimposed on existing infrastructure networks to enhance coverage and Expand business and provide users with adaptive and flexible access services. [0004] For a general communication network, a major factor in its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04B7/26
Inventor 田辉谢芳张平
Owner SPREADTRUM COMM (SHANGHAI) CO LTD