MIMO Transmission Mode Selection Based on Scheduling Rate
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Solution Overview
Problem
Current MIMO multicasting systems cannot simultaneously select a transmission mode based on spectral efficiency and scheduling rate, leading to suboptimal performance in high-speed wireless networks.
Innovation Solution
A system and method that determines minimum equivalent diversity and multiplexing SNRs for spatial diversity and multiplexing modes, respectively, and selects a transmission mode between these modes based on diversity and multiplexing scheduling numbers to optimize spectral efficiency and scheduling rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SISO architecture uses common modulation coding based on worst channel condition to guarantee scheduling number, then scheduling number is guaranteed, but spectral efficiency rapidly reduces
Solution Approach 1:
The patent changes the parameter basis from using a single common modulation coding (based on worst channel) to using multiple modulation codings tailored to different channel conditions. By calculating equivalent SNR for each client and selecting appropriate modulation codings, the system transforms the uniform parameter approach into a differentiated parameter approach, thereby improving spectral efficiency while maintaining scheduling number guarantees.
Solution Approach 2:
The patent applies local quality by assigning different modulation codings to different clients based on their individual channel conditions. Instead of using a uniform modulation coding for all clients (global approach), the system calculates equivalent SNR for each client and selects modulation coding locally optimized for that client's channel, thus improving overall spectral efficiency while ensuring each client receives service appropriate to its channel quality.
2Productivity
If MIMO system selects transmission mode without considering scheduling rate factor, then theoretical communication capacity is achieved, but the system is not appropriate for real operations
Solution Approach 1:
The patent introduces feedback mechanism by calculating the scheduling rate factor based on the number of clients that can be served with each transmission mode and modulation coding combination. The system evaluates how many clients achieve their required data rates under each mode (SD or SM) and uses this feedback to select the optimal transmission mode, thereby bridging the gap between theoretical capacity and practical operability.
Solution Approach 2:
The patent implements dynamics by making the transmission mode selection adaptive rather than static. The system dynamically calculates equivalent SNR, determines suitable modulation codings, computes scheduling rate factors, and selects transmission modes based on real-time channel conditions and client requirements. This dynamic approach allows the system to adapt to varying operational conditions, making it suitable for real-world deployments.
3Adaptability or versatility
If algorithms for automatic mode switching are proposed without scheduling rate factor, then mode adaptation is achieved, but scheduling rate optimization is absent
Solution Approach 1:
The patent enhances mode switching algorithms by incorporating scheduling rate factor calculation as feedback. For each candidate transmission mode and modulation coding combination, the system calculates how many clients can be successfully scheduled and what the overall scheduling rate would be. This feedback loop enables the system to not only adapt modes to channel conditions but also optimize for maximum scheduling rate, directly addressing the missing element in prior algorithms.
Data Source
AI summary
A system for selecting a transmission mode under the multi-input multi-output (MIMO) architecture based on a scheduling number and a method thereof are provided. A modulation coding of the spatial diversity (SD) mode and the spatial multiplexing (SM) mode according to channel state information sent from client ends is determined, respectively. The SD mode or the SM mode is selected in accordance with a scheduling number of using the SD mode and a scheduling number of using the SM mode, respectively. The transmission mode is selected based on the spectrum utilization and the scheduling rate, which achieves improving the spectrum utilization on the premise of the scheduling rate.