Downlink Signal Weighted Processing for Relay Networks
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Solution Overview
Problem
Existing communication technologies in Next Generation Networks (NGN) fail to optimize downlink signals effectively, leading to suboptimal network capacity and communication quality in relay mobile networks.
Innovation Solution
A method and system for performing weighted processing on downlink signals by acquiring Channel Impulse Responses (CIR) from Base Stations (BS) to relay stations and from relay stations to Mobile Stations (MS), determining pre-coding weights and relay weights, and applying these weights to optimize the downlink signals at both the BS and relay stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the BS transmits downlink signal without weighted processing, then the transmission process is simple, but the network capacity and communication quality are suboptimal
Solution Approach 1:
The patent applies preliminary action by performing pre-coding weighted processing at the BS before signal transmission. The pre-coding weight is calculated based on channel state information and applied to the downlink signal in advance, optimizing the signal before it reaches the relay station. This preliminary optimization improves network capacity and communication quality without requiring complex real-time processing at the relay station.
Solution Approach 2:
The patent implements parameter changes by introducing weight parameters (pre-coding weight and relay weight) that modify the downlink signal characteristics. These weights are calculated based on channel impulse responses and signal-to-noise ratio requirements, dynamically adjusting signal parameters to optimize transmission efficiency and communication quality while maintaining manageable system complexity.
2Reliability
If the BS transmits downlink signal without optimization, then the transmission process is simple, but the downlink SINR requirement is not met
Solution Approach 1:
The patent implements feedback by using channel impulse response information from the relay station to BS and from MS to relay station to calculate optimal pre-coding and relay weights. This feedback mechanism ensures that the downlink signal meets the required SINR threshold by continuously adapting the weighting parameters based on actual channel conditions, thereby improving reliability without excessive complexity.
Solution Approach 2:
The patent changes signal parameters by applying pre-coding weight and relay weight to the downlink signal. These parameter modifications are calculated to ensure the SINR requirement is met at the MS, transforming the signal characteristics to achieve reliable communication while keeping the processing complexity manageable through efficient weight calculation algorithms.
3Reliability
If weighted processing is applied at both BS and relay station, then communication quality is improved, but the system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the weighted processing into two distinct stages: pre-coding weight application at the BS and relay weight application at the relay station. This segmentation allows each node to perform optimized processing independently based on local channel information, improving communication quality while distributing system complexity across multiple nodes rather than concentrating it in one location.
Data Source
AI summary
A method, device, and communications system for performing weighted processing on a downlink signal are provided. The method includes: acquiring a first CIR from a BS to a relay station and a second CIR from the relay station to a MS; determining a pre-coding weight and a relay weight according to the first CIR and the second CIR; and respectively sending the pre-coding weight and the relay weight to the BS and the relay station, so that the BS is enabled to perform weighted processing on a downlink signal according to the pre-coding weight to obtain a downlink pre-coding weighted signal and send the downlink pre-coding weighted signal to the relay station, and the relay station is enabled to perform weighted processing on the downlink pre-coding weighted signal received by the relay station according to the relay weight to obtain a downlink relay weighted signal and send the downlink relay weighted signal to the MS. Thereby, the downlink signal is optimized at the BS and the relay station respectively, thus optimizing the network capacity and improving the communication quality.