Spatial Reuse Wireless Resource Allocation
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Solution Overview
Problem
Existing piconet communication systems face reduced wireless resource utilization due to the use of different frequency and time resources by communication devices, and there is a need to optimize the spatial reuse scheme for directional antennas to increase throughput.
Innovation Solution
The proposed method allows multiple communication links to reuse the same frequency and time resources by implementing a spatial reuse scheme, where the network coordinator efficiently allocates overlapping time resources, ensuring minimal interference through directional antenna training and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different frequency resources or different time resources are used by communication links, then interference between links is reduced, but utilization of wireless resources is reduced
Solution Approach 1:
The patent introduces spatial dimension through directional antennas to resolve the contradiction. By forming beams in different spatial directions, multiple communication links can reuse the same frequency and time resources without causing harmful interference, thus improving wireless resource utilization while maintaining reliable communication through spatial separation.
2Productivity
If spatial reuse scheme is implemented with directional antennas, then wireless resource utilization is increased, but interference management complexity increases
Solution Approach 1:
The patent applies preliminary action by performing antenna training and beam formation before actual data transmission. The network coordinator pre-establishes directional beams and determines spatial reuse feasibility through training sequences, so that interference management is handled in advance rather than during data transmission, reducing real-time complexity.
3Reliability
If time resources are reserved in advance for transmitter/receiver pairs, then communication reliability is improved, but flexibility in resource allocation is reduced
Solution Approach 1:
The patent implements dynamic resource allocation by allowing the network coordinator to adjust time resource reservations based on current network conditions. The coordinator can allocate time resources dynamically to different transmitter/receiver pairs while maintaining reliability through coordinated scheduling, thus achieving both reliability and flexibility.
Data Source
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AI summary
A method of operating a network coordinator for a spatial reuse scheme includes receiving a reservation request for a time period for a data communication of a target transmitter/receiver pair that uses a directional antenna, searching for a time period reserved in advance for another transmitter/receiver pair, from a Channel Time Allocation Period (CTAP) that is a contention-free access period for the data communication, and reserving a time period for the target transmitter/receiver pair in the CTAP, so that the time period reserved for the target transmitter/receiver pair overlaps the time period reserved in advance for the other transmitter/receiver pair.