Distributed Multi-Radio Transmission Diversity Scheduling
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Solution Overview
Problem
Current multi-radio transmission diversity (MRTD) approaches in wireless communication systems require high-speed links between base stations for information sharing, leading to increased costs and potential delays in channel quality information, which can impact network performance, especially for mobile stations moving at moderate speeds.
Innovation Solution
Each base station independently receives and processes downlink measurement reports from mobile stations, determining which base station should transmit data without relying on high-speed links between them, using a maximum throughput allocation strategy to pair base stations with mobile stations for efficient transmission, and includes error detection techniques to ensure accurate decoding and minimize overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If centralized MRTD approach with high-speed links between base stations is used, then throughput is maximized through joint-scheduling, but network cost increases and information sharing delays occur
Solution Approach 1:
Each base station independently performs scheduling decisions using locally available downlink measurement reports from mobile stations. The base station autonomously determines which mobile station to serve and on which resource without requiring centralized coordination or high-speed inter-base-station links, thereby eliminating the need for expensive backhaul infrastructure while maintaining scheduling functionality
Solution Approach 2:
The centralized joint-scheduling function is divided into independent distributed scheduling decisions at each base station. Instead of one centralized controller making all scheduling decisions, each base station segments the scheduling task and makes local decisions based on its own measurements and the shared measurement reports from mobile stations, eliminating the need for continuous inter-base-station communication
2Reliability
If information sharing between base stations is delayed, then channel quality information becomes out-of-date, but high-speed links introduce communication delays
Solution Approach 1:
Mobile stations proactively provide downlink measurement reports to all base stations before scheduling decisions are needed. These measurement reports contain pre-collected channel quality information that base stations can use immediately for scheduling without requiring real-time information exchange between base stations, ensuring up-to-date channel information is available when needed
Solution Approach 2:
Each base station independently uses its own downlink measurement reports and locally available information to make scheduling decisions without waiting for or exchanging information with other base stations. This autonomous decision-making eliminates inter-base-station communication delays while maintaining scheduling effectiveness based on current channel conditions
Data Source
AI summary
A method of communicating provides multi-radio transmission diversity (MRTD). A base station receives downlink measurement reports from a mobile station regarding each of a plurality of downlinks between the mobile station and a plurality of base stations. The base station determines which of the base stations will transmit a selected transmission to the mobile station responsive to the received downlink measurement reports. The base station later receives an acknowledgement from the mobile station receiving the selected transmission. In a disclosed example, each of a plurality of base stations receives the downlink measurement reports. Each of the base stations determines, independent of the other base stations, which of the base stations will transmit the selected transmission.