Uplink Signal Weighted Processing for Relay Networks
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Solution Overview
Problem
Current relay mobile networks lack a technical means to optimize network capacity and ensure communication quality by optimizing the transmitted signal of relay stations.
Innovation Solution
A method and device for uplink signal weighted processing, which involves acquiring channel impulse responses from a Mobile Station to a relay station and from the relay station to a Base Station, determining relay weights and demodulation weights, and applying these weights for weighted processing at the relay station and demodulation at the Base Station to optimize the uplink signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional uplink transmission optimization by MS is used, then uplink SINR requirement is satisfied, but network capacity cannot be optimized
Solution Approach 1:
The patent divides the uplink signal processing into two separate optimization stages: relay weight optimization at the relay station and demodulation weight optimization at the base station. This segmentation allows independent optimization of each stage to simultaneously improve network capacity and maintain SINR requirements.
Solution Approach 2:
The patent performs preliminary optimization by determining relay weights before signal transmission and demodulation weights before signal reception. This preliminary action enables the system to pre-optimize the signal path, improving network capacity while ensuring SINR requirements are met from the outset.
2Device complexity
If relay station transmits signal without optimization, then device complexity is low, but communication quality deteriorates
Solution Approach 1:
The patent applies local quality optimization by introducing relay weights specifically at the relay station and demodulation weights specifically at the base station. Each node performs localized weight optimization tailored to its specific function, improving communication quality without requiring complex system-wide reconfiguration.
Solution Approach 2:
The patent changes the signal processing parameters by introducing weight coefficients (relay weights and demodulation weights) that modify the signal characteristics. These parameter changes enable optimization of communication quality through mathematical transformation rather than hardware complexity increases.
3Productivity
If weighted processing is applied at relay station and base station, then network capacity is optimized, but device complexity increases
Solution Approach 1:
The patent segments the weight optimization process into two independent modules: relay weight determination at the relay station and demodulation weight determination at the base station. This segmentation reduces overall system complexity by allowing each node to independently optimize its own weights without requiring complex coordination.
Solution Approach 2:
The patent implements feedback mechanisms where channel impulse responses are measured and used to determine optimal weights. The base station feeds back channel information to the relay station, enabling adaptive weight optimization that improves network capacity while maintaining manageable complexity through iterative refinement.
Data Source
AI summary
An uplink signal weighted processing method is disclosed. A first channel impulse response from a Mobile Station (MS) to a relay station, and a second channel impulse response from the relay station to a Base Station (BS) are acquired. A relay weight and a demodulation weight are determined according to the first channel impulse response and the second channel impulse response. The relay weight is sent to the relay station and the demodulation weight is sent to the BS, so as to enable the relay station to perform weighted processing on an MS uplink signal received by the relay station according to the relay weight to obtain an uplink relay weighted signal and to send the uplink relay weighted signal to the BS, and so as to enable the BS to perform demodulation weighted processing on the uplink relay weighted signal received by the BS according to the demodulation weight to obtain an uplink estimation signal corresponding to the MS uplink signal.