WLAN Resource Allocation via Request Count Broadcasting

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Solution Overview

Problem

In WLAN systems supporting multi-user transmission schemes, collisions during resource allocation requests lead to decreased wireless resource efficiency and increased service delay due to the limited number of antennas used by access points, which cannot accommodate the greater number of stations requesting resources simultaneously.

Innovation Solution

The proposed method involves an access point broadcasting a resource allocation request count, allowing only a specified number of stations to transmit resource allocation requests based on available antennas, thereby preventing collisions and optimizing resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a multi-user transmission scheme is supported with multiple antennas, then the data rate and spectral efficiency are improved, but the number of stations that can simultaneously request resources is limited by the number of antennas

Engineering Contradiction:
Improvedata rateVSAvoidnumber of simultaneous resource requests
Core Design Contradiction:
ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent introduces a new dimension for resource allocation by allowing multiple resource allocation requests to be transmitted on different channels simultaneously. Instead of limiting the number of simultaneous requests to the number of antennas, the system enables stations to request resources on different channels, effectively adding a channel dimension to the resource allocation process. This resolves the contradiction by decoupling the limitation from the antenna count and introducing channel diversity as an additional degree of freedom.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Speed

If multiple stations transmit resource allocation requests simultaneously, then the service speed is improved, but collisions occur leading to decreased wireless resource efficiency

Engineering Contradiction:
Improveservice speedVSAvoidwireless resource efficiency
Core Design Contradiction:
SpeedVSLoss of energy

Solution Approach 1:

The patent segments the resource allocation request process by assigning different channels to different stations. Instead of having all stations compete on a single channel where collisions occur, the system divides the request mechanism into multiple parallel channels. This segmentation eliminates collisions while maintaining simultaneous transmission capability, thus preserving service speed without sacrificing wireless resource efficiency.

Inventive Principle:
Principle #1Segmentation

3Device complexity

If the access point uses a limited number of antennas for resource allocation, then the device complexity is reduced, but the number of stations that can be served simultaneously is limited

Engineering Contradiction:
Improvenumber of antennasVSAvoidnumber of served stations
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The patent resolves this contradiction by introducing the channel dimension as an additional resource for accommodating multiple stations. Instead of increasing the number of antennas to serve more stations simultaneously, the system utilizes multiple channels to provide the necessary capacity. This allows the access point to maintain a limited number of antennas while still serving a larger number of stations by allocating different channels to different stations for resource allocation requests.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP3195676B1Apparatus and method for operating resource in wireless local area network system supporting multi-user transmission scheme
Publication Date: 2022.04.13 SAMSUNG ELECTRONICS CO LTD
  • EP3195676B1 patent drawingFigure 1
  • EP3195676B1 patent drawingFigure 2
  • EP3195676B1 patent drawingFigure 3

AI summary

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as a Long Term Evolution (LTE).A method for operating a resource in a first device in a wireless local area network (WLAN) system supporting a multi-user transmission scheme is provided.The method includes determining a number of resource allocation request messages acceptable at a timing point; and transmitting information related to the number of resource allocation request messages, wherein a resource allocation request message is acceptable if the first device is capable of allocating a resource to a second device that transmits the resource allocation request message at the timing point.