Multiflow Antenna Selection Scheduling for LTE WLAN
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Solution Overview
Problem
Current wireless communication systems face challenges in optimizing multiflow performance and priority across user equipment (UEs) and networks, particularly in managing concurrent connections with multiple access points using different radio access technologies, such as LTE and WLAN, and in efficiently scheduling transmissions based on channel state information (CSI) feedback.
Innovation Solution
The implementation of a central scheduler that performs prioritization and scheduling for UEs in multiflow operation, using CSI feedback to determine optimal antenna subsets and scheduling modes, including separate priorities, single priority lists, orthogonal scheduling, and individual priority lists for LTE and WLAN networks, to optimize communication rates and resource allocation across multiple access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antenna subsets are evaluated for channel estimation, then communication rate optimization is improved, but computational complexity increases
Solution Approach 1:
The patent applies partial action by evaluating only a subset of possible antenna combinations rather than all possible combinations. The UE evaluates channel estimates for multiple antenna subsets but selects only the optimal one for feedback, reducing computational burden while maintaining rate optimization benefits.
Solution Approach 2:
The patent changes the parameter of antenna subset selection dynamically based on channel conditions. The UE determines which antenna subsets to evaluate based on current channel state information, adjusting the search space adaptively to balance computational complexity with rate optimization needs.
2Productivity
If CSI feedback is provided for multiple access points, then scheduling optimization is improved, but feedback overhead increases
Solution Approach 1:
The patent extracts only the essential CSI information needed for scheduling decisions. Instead of feedback for all possible antenna combinations, the UE provides feedback for selected antenna subsets that represent the optimal performance characteristics, reducing feedback overhead while maintaining scheduling optimization capability.
Solution Approach 2:
The patent makes the CSI feedback mechanism multi-functional by having the same feedback structure serve multiple purposes: characterizing channel conditions for different access points, enabling scheduling decisions, and supporting antenna selection. This universal approach reduces redundant feedback requirements.
3Reliability
If receive antenna selection is implemented, then communication quality is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by having the UE autonomously select optimal antenna subsets based on local channel conditions without requiring complex centralized control. The UE independently evaluates channel estimates and determines its own antenna configuration, reducing the complexity burden on the network side while maintaining high communication quality.
Data Source
AI summary
Optimizing multiflow performance and priority across UEs and networks including receive antenna selection at the UEs, CSI measurement and reporting, and scheduling for multiflow operation. The techniques may evaluate channel conditions for a UE for multiple access points and different combinations of antennas and determine how the UE should feedback CSI for transmissions from the multiple access points. The disclosed techniques also include techniques for scheduling transmissions from the multiple access points using the CSI information to optimize multiflow performance and priority across UEs and networks. Various scheduling modes use feedback from UEs including the maximum supported rates for each link and/or rates based on the maximum sum capacity of the links used concurrently. The scheduler may maintain separate priority lists for each access point or a single priority list across both access points. The techniques may be used for multiflow operation using LTE and WLAN links.