PSMP Frame Station Grouping for WLAN Resource Allocation
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Solution Overview
Problem
Conventional power-saving multi-poll (PSMP) protocols in wireless local area networks (WLANs) face significant overhead when scheduling a large number of stations, leading to ineffective resource management.
Innovation Solution
A method and apparatus for transmitting station grouping information and uplink resource allocation using a PSMP frame, where the contention phase is strategically located before, between, or after the downlink and uplink phases, and includes a PSMP STA Info Fixed field with offset, duration, and station group configuration information to allocate resources efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional PSMP protocols schedule a large number of stations one by one, then each station can be individually served, but significant overhead is caused and resource management becomes ineffective
Solution Approach 1:
The patent segments stations into groups and allocates resources to station groups rather than to individual stations. The access point transmits control information that includes station group information and uplink resource allocation information for each station group, allowing multiple stations to share common resource allocation time. This segmentation approach reduces the overhead of scheduling while maintaining effective resource management.
2Reliability
If resources are allocated to each station individually, then each station gets dedicated resources, but contention levels increase and power consumption rises
Solution Approach 1:
The patent merges multiple stations into station groups and combines their resource allocation requirements. The access point transmits control information containing uplink resource allocation information that is shared by all stations in a group during the uplink phase. This merging reduces the number of individual allocations, thereby reducing contention levels and power consumption while maintaining QoS through group-based resource management.
3Productivity
If the contention phase is located after the uplink phase, then downlink transmission can be completed first, but uplink stations may experience increased delay
Solution Approach 1:
The patent provides flexibility in positioning the contention phase relative to other phases. The contention phase can be located before the downlink phase, between the downlink and uplink phases, or after the uplink phase. This dynamic positioning allows the system to optimize transmission efficiency and minimize uplink delay based on specific operational requirements, rather than being constrained to a fixed phase order.
Data Source
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AI summary
The present description relates to a method in which a station transmits data in a wireless LAN system, comprising the following steps: receiving, from an access point, control information containing station group configuration information, which indicates the configurations of station groups and uplink resource allocation information on the resource allocated to each station group; determining, on the basis of the control information, the station group to which the station belongs; and transmitting uplink data to the access point by contending with other stations in the determined station group.