Basic Service Set Transmission Coordination for Interference Control
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Solution Overview
Problem
Wireless networks deployed in close proximity experience interference due to signal propagation beyond intended boundaries, leading to reduced performance.
Innovation Solution
A system that coordinates transmissions between basic service sets (BSSs) by maintaining a data structure to track the communication state of nearby access points, allowing access points to coordinate their transmissions and refrain from interfering with each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless networks are deployed in close proximity to provide coverage in shopping malls and stores, then network coverage and connectivity are improved, but signal interference between neighboring BSSs increases
Solution Approach 1:
The patent implements a feedback mechanism where access points exchange information about their transmission schedules and receive acknowledgments confirming successful transmission. This feedback loop allows neighboring BSSs to adjust their transmissions based on actual channel conditions, reducing interference while maintaining coverage.
Solution Approach 2:
The patent employs preliminary coordination where access points pre-establish transmission schedules and reserve time slots before actual data transmission occurs. This preliminary action prevents overlapping transmissions and reduces interference proactively, allowing dense network deployment.
2Productivity
If access points transmit continuously to maintain connectivity, then productivity and latency are improved, but interference with neighboring BSSs increases
Solution Approach 1:
The patent implements periodic transmission slots where access points transmit data in scheduled intervals rather than continuously. Each access point is assigned specific time slots for transmission, creating a periodic action pattern that maintains connectivity while preventing simultaneous transmissions that would cause interference.
Solution Approach 2:
The patent segments the transmission timeline into discrete time slots and frames, dividing the continuous communication process into manageable segments. This segmentation allows multiple BSSs to share the medium efficiently without overlapping transmissions, improving productivity while controlling interference.
3Device complexity
If access points use traditional independent transmission without coordination, then device complexity is reduced, but transmission reliability and latency increase due to interference
Solution Approach 1:
The patent implements self-service mechanisms where access points autonomously manage their own transmissions by maintaining local copies of transmission schedules and sending brief acknowledgment messages. Each access point independently tracks its own and neighboring BSSs' transmission states, eliminating the need for complex centralized coordination while improving reliability.
Solution Approach 2:
The patent introduces transmission schedule information and acknowledgment messages as intermediaries that carry coordination data between access points. These intermediary elements enable reliable transmission coordination without requiring complex direct interactions or centralized control, maintaining simplicity while improving reliability.
Data Source
AI summary
The present disclosure describes a system that coordinates transmissions between BSSs. A first access point assigned to a first basic service set includes a memory and a processor. The memory stores a data structure that includes a first entry. The first entry indicates (i) a second access point assigned to a second basic service set different from the first basic service set, (ii) a first message at the second access point that has not been transmitted. The processor refrains, based on the first entry, from transmitting a second message for a period of time and in response to detecting that the second access point transmitted the first message, updates the first entry to indicate that the first message has been transmitted. The processor also transmits, to the second access point, a third message indicating that the first message has been transmitted.