Access Point Transmission Control via Aggressive Background Phases
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Solution Overview
Problem
Current wireless home networking systems lack effective control over downstream and upstream transmission opportunities, leading to unfair distribution of bandwidth and potential starvation of downstream transmissions.
Innovation Solution
Implementing a method where access points cyclically alternate between aggressive and background phases for contention, using priority-based backoff settings to manage transmission opportunities, ensuring fair distribution of bandwidth by prioritizing high-priority traffic and allowing other devices to transmit during low-traffic periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If access points use random backoff periods within contention windows, then transmission opportunities are distributed among stations, but downstream transmissions may be starved by upstream transmissions and bandwidth distribution becomes unfair
Solution Approach 1:
The access point dynamically adjusts its backoff behavior by switching between aggressive mode (short backoff) when downstream traffic needs priority and passive mode (long backoff) when upstream traffic should be allowed. This dynamic adjustment resolves the contradiction by making the backoff period adaptive rather than static, ensuring fairness while maintaining downstream productivity
Solution Approach 2:
The access point periodically alternates between aggressive and passive phases, creating a cyclic pattern of contention behavior. During aggressive phases, it competes actively for downstream transmissions; during passive phases, it yields to upstream transmissions. This periodic alternation ensures both downstream throughput and upstream fairness over time
2Productivity
If access points contend aggressively for transmission opportunities, then downstream transmission opportunities increase, but upstream transmissions from stations are starved
Solution Approach 1:
The access point dynamically switches between aggressive contention (short backoff) to maximize downstream throughput and passive contention (long backoff) to allow upstream transmissions. This dynamic behavior ensures that downstream productivity is maintained while periodically yielding to preserve upstream fairness
Solution Approach 2:
The access point proactively controls its own backoff behavior based on traffic conditions, rather than reacting to starvation. By preliminarily adjusting its contention aggressiveness, it prevents upstream starvation before it occurs while ensuring downstream transmissions receive adequate opportunities
3Adaptability or versatility
If backoff periods are randomly set within contention windows, then transmission opportunities are distributed, but the system cannot guarantee fair distribution among competing stations
Solution Approach 1:
The access point changes the backoff parameter from a purely random value to a controlled value that switches between short and long durations based on traffic priority and phase. This parameter change maintains the flexibility needed for adaptive contention while providing the reliability of guaranteed fair distribution through deliberate control
Data Source
AI summary
Methods, systems, and computer readable media can be operable to facilitate the management of access point transmissions based upon priority of traffic. An access point may periodically cycle between aggressive phases, during which the access point contends for downstream transmission opportunities aggressively, and background phases, during which the access point contends for downstream transmission opportunities passively. The access point may alternate between aggressive and background phases based upon a priority level of received packets, services, and/or clients. The access point may also alternate between aggressive and background phases based upon the congestion level and/or health of an associated network.