Terminal Apparatus Contention Window Adjustment for TWT Service Periods
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Solution Overview
Problem
Existing communication systems face inefficiencies in managing radio resources, particularly during Target Wake Time (TWT), leading to suboptimal contention window size adjustments in carrier sense mechanisms.
Innovation Solution
The terminal and base station apparatuses include a MAC layer processing unit that recognizes the service period in TWT and adjusts the maximum contention window size based on conditions related to this period, optimizing carrier sense procedures for efficient frame transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the maximum contention window size is fixed in carrier sense, then the carrier sense mechanism is simple to implement, but communication efficiency deteriorates during TWT service periods
Solution Approach 1:
The patent applies dynamics by making the maximum contention window size variable rather than fixed. The system dynamically adjusts the maximum contention window size based on whether the current time falls within a TWT service period, transitioning between a first value (during service period) and a second value (outside service period). This dynamic adjustment optimizes communication efficiency during TWT while maintaining manageable complexity through condition-based switching.
Solution Approach 2:
The patent implements parameter changes by modifying the maximum contention window size parameter based on the TWT service period condition. The MAC layer processing unit changes this parameter from a fixed value to a conditional value that depends on time synchronization with TWT, thereby improving communication efficiency without requiring fundamental changes to the carrier sense mechanism structure.
2Productivity
If the maximum contention window size is adjusted based on TWT service period, then communication efficiency improves, but the complexity of carrier sense mechanism increases
Solution Approach 1:
The system uses dynamics to adjust the maximum contention window size based on the TWT service period condition. The MAC layer processing unit monitors the current time against the TWT schedule and dynamically switches between two predefined values, achieving improved communication efficiency while keeping the implementation complexity manageable through simple conditional logic rather than complex algorithms.
Solution Approach 2:
The patent employs feedback by having the MAC layer processing unit continuously monitor the TWT service period status and use this information to adjust the maximum contention window size. This feedback mechanism ensures that the contention window is optimized for TWT traffic while maintaining simplicity through direct condition-based adjustment rather than complex control systems.
3Ease of manufacture
If a fixed contention window size is used, then the implementation is straightforward, but radio resource management becomes inefficient during TWT
Solution Approach 1:
The patent applies parameter changes by modifying the maximum contention window size parameter based on the TWT service period condition. The MAC layer processing unit changes this parameter from a fixed value to a conditional value that depends on time synchronization with TWT, thereby improving communication efficiency without requiring fundamental changes to the carrier sense mechanism structure.
Solution Approach 2:
The system uses dynamics to adjust the maximum contention window size based on the TWT service period condition. The MAC layer processing unit monitors the current time against the TWT schedule and dynamically switches between two predefined values, achieving improved communication efficiency while keeping the implementation complexity manageable through simple conditional logic rather than complex algorithms.
Data Source
AI summary
A MAC layer processing unit configured to recognize a service period configured in TWT, and a transmitter configured to perform transmission of a frame in the TWT are included. A maximum value of a contention window size is changed in carrier sense performed prior to the transmission of the frame, based on a condition related to the service period.