Selection method of wireless relay station

Abstract

The invention discloses a method for selecting wireless relay stations. The operation steps are as follows: (1) the relay stations are selected according to business uplink and downlink features and different states of various relay stations among all relay stations in a cell, three basic selection criteria at this time are as follows: comprehensively considering states of uplink and downlink channels to select the appropriate relay stations to perform uplink communication and downlink communication, separately considering the states of the uplink channel to select the appropriate uplink transmission relay stations, or separately considering the states of the downlink channel to select the appropriate downlink transmission relay stations; (2) business type is judged according to business features of variable speed and fixed speed and the corresponding selection principle, respectively selecting one or a plurality of appropriate relay stations, and the capacity access thresholds of the relay stations are self-adaptively and flexible set. Therefore the selection method for the wireless relay stations can select the relay stations efficiently and rapidly, reduce signaling overhead and improve utilization rate of radio resources.

Description

technical field [0001] The present invention relates to a relay technology for wireless communication, to be precise, to a method for selecting relay stations of various wireless access systems including wireless local area network and wireless metropolitan area network based on relay networking technology, which belongs to wireless communication technology field. Background technique [0002] The current mobile communication still adopts the traditional cellular structure, but if the fourth generation (4G) wireless communication system with ultra-high data transmission rate still adopts this traditional cellular structure, many problems will arise. The main reasons are: First, the transmission rate of the 4G system is two levels higher than that of the 3G system. In the case of a given transmit power level, the symbol (bit) energy will decrease linearly with the increase of the transmission rate, so this requirement will cause serious power consumption problems. Second, t...

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Problems solved by technology

For a given transmit power level, symbol (bit) energy decreases linearly with increasing transmission rate, so this requirement creates serious power consumption issues

Second, the spectrum released for the 4G system will be at least higher than the 2GHz band of the spectrum used by the 3G system, because the wireless signals in these frequency bands usually have a poor propagation effect under non-line-of-sight conditions, which is what is happening today. Typical operation mode of urban cellular communication

The currently used relay station selection method is not suitable for multi-relay cooperative communication systems. If it is used in multi-relay cooperative systems, there will be more problems and difficulties

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