TDD Scheduling Overhead Reduction via Slot Repetition
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Solution Overview
Problem
Current wireless LAN systems face inefficiencies in TDD scheduling due to high overhead from repeated TDD slot assignments, which affect performance.
Innovation Solution
A method is introduced where a first wireless terminal transmits frames defining the structure and schedule of TDD service periods, including consecutive and adjacent TDD intervals with specific slot operations, allowing for reduced overhead by repeating slot definitions within a duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TDD slot assignment is repeatedly transmitted for each TDD service period, then the scheduling flexibility and reliability are improved, but the overhead increases and system performance deteriorates
Solution Approach 1:
The patent applies preliminary action by transmitting TDD slot assignment information in advance before the actual TDD service periods occur. The schedule is established beforehand and can be reused across multiple service periods, eliminating the need for repeated transmissions and reducing overhead while maintaining scheduling reliability.
Solution Approach 2:
The patent implements universality by creating a universal TDD slot assignment schedule that can be applied across multiple TDD service periods. This single schedule structure serves multiple functions and time periods, reducing the need for separate assignments for each service period and thereby reducing overhead.
2Adaptability or versatility
If TDD slot assignment is transmitted frequently, then the scheduling accuracy and adaptability are improved, but the overhead increases
Solution Approach 1:
The patent uses preliminary action to establish TDD slot assignments in advance, allowing the system to adapt to different service periods without requiring frequent retransmissions. The pre-configured schedules maintain adaptability while reducing the quantity of control information that needs to be transmitted.
Solution Approach 2:
The patent implements periodic action by using recurring TDD service period structures with consistent slot assignments. This periodic pattern allows the system to maintain adaptability through the established schedule while avoiding the overhead of continuous retransmission of assignment information.
3Manufacturing precision
If detailed TDD slot assignments are provided for each service period, then the scheduling precision is improved, but the overhead increases and efficiency decreases
Solution Approach 1:
The patent applies preliminary action by configuring detailed TDD slot assignments in advance for multiple service periods. This approach maintains scheduling precision through careful pre-planning while improving system efficiency by eliminating the need for repeated control information transmissions.
Solution Approach 2:
The patent merges multiple TDD slot assignment schedules into a single unified schedule structure that covers multiple service periods. This combination maintains the precision of individual slot assignments while improving efficiency by reducing the total amount of control information that must be transmitted and processed.
Data Source
AI summary
A method for supporting TDD in a wireless LAN system of the present specification comprises the steps of: transmitting, by a first wireless terminal, a first frame including a first information element defining a structure of a TDD service period (SP) for TDD channel access, wherein the structure of the TDD SP includes a plurality of consecutive and adjacent TDD intervals, and each of the plurality of TDD intervals includes at least one TDD slot; and transmitting, by the first wireless terminal, a second frame including a second information element defining a schedule for TDD channel access of a second wireless terminal within the TDD SP, to the second wireless terminal, wherein the second information element includes: first information defining an operation type of each of a plurality of TDD slots included in at least one TDD interval for the second wireless terminal within the TDD SP; and second information associated with a duration to which the second information element is applied, and the plurality of TDD slots defined by the first information are repeated during the duration.