Multi-Time-Segment Resource Indication for WLAN Uplink Efficiency
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Solution Overview
Problem
Existing WLAN devices have low efficiency in transmitting small-sized traffic due to the repeated transmission of preamble parts in uplink multi-user scenarios, leading to inefficient data transmission.
Innovation Solution
A multi-time-segment-based resource indication method and apparatus that aggregates uplink data from multiple stations into a single Physical Protocol Data Unit (PPDU) and schedules transmission across multiple time segments, using a trigger frame with time segment information fields that include common and user-specific information to ensure efficient data transmission and acknowledgement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple stations send uplink data simultaneously in existing WLAN systems, then resource utilization is improved, but transmission efficiency deteriorates due to repeated preamble parts occupying excessive bandwidth
Solution Approach 1:
The patent segments the uplink transmission process into multiple time segments within a single PPDU structure. Multiple stations send their data in different time segments rather than simultaneously, allowing the access point to schedule and manage transmissions more efficiently. This segmentation reduces the need for repeated preamble parts while maintaining resource utilization.
Solution Approach 2:
The patent implements periodic time segments for uplink transmissions, where stations send data in scheduled intervals rather than continuously or simultaneously. The access point uses trigger frames to schedule stations in different time segments, creating a periodic transmission pattern that reduces preamble redundancy while ensuring fair resource allocation.
2Productivity
If small-sized traffic is transmitted using existing WLAN protocols, then data transmission is enabled, but overall transmission efficiency deteriorates due to large preamble overhead relative to payload size
Solution Approach 1:
The patent merges multiple small-sized uplink transmissions from different stations into a single aggregated PPDU structure. By combining multiple transmissions that would otherwise require separate preambles into one unified transmission unit, the overhead is amortized across multiple data payloads, significantly improving efficiency for small-sized traffic.
Solution Approach 2:
The patent creates a universal PPDU structure that can accommodate multiple stations' transmissions with a single preamble. This multi-functional structure serves multiple purposes: it provides a common transmission framework, schedules multiple stations, and reduces overall overhead, making it particularly effective for small-sized traffic where payload is minimal.
3Ease of operation
If the access point schedules multiple stations using separate trigger frames, then resource allocation is achieved, but system complexity and transmission overhead increase
Solution Approach 1:
The patent combines multiple trigger frame functions into a single trigger frame that schedules multiple stations simultaneously. Instead of sending separate trigger frames to each station, the access point sends one consolidated trigger frame containing scheduling information for multiple stations, reducing processing complexity and transmission overhead while maintaining full resource allocation capability.
Data Source
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AI summary
Embodiments of the present invention provide a multi-time-segment-based resource indication method. The method includes: sending, by an access point, a trigger frame, where the trigger frame carries a plurality of time segment information fields, and each of the plurality of time segment information fields includes common information and user-specific information of one or more stations; receiving, by the access point, a multi-time-segment uplink physical protocol data unit PPDU, where the multi-time-segment uplink PPDU includes uplink data sent by a plurality of stations in a plurality of time segments; and sending, by the access point, an acknowledgement frame. The embodiments of the present invention further provide a corresponding resource indication apparatus. The method and the apparatus in the embodiments of the present invention are applied, to implement high efficiency resource indication and acknowledgement in a plurality of time segments in an 802.11ax system, and improve efficiency of transmitting small-sized traffic by an existing WLAN device.