Relay Traffic Scheduling for Wireless Coverage

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Solution Overview

Problem

Wireless network congestion and low throughput due to inadequate coverage and frequency spectrum limitations, particularly for mobile devices, which face obstacles and limited data transfer due to high frequency signal susceptibility and path loss.

Innovation Solution

Implementing a traffic scheduler that directs data flow relays between access points and client devices, using high frequency wireless links and multiple client devices to overcome coverage and frequency limitations by scheduling relay instructions and generating wireless links between client devices to facilitate data transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If high frequency signaling is used to enable higher throughput, then data throughput is improved, but coverage area is reduced due to higher path loss

Engineering Contradiction:
Improvedata throughputVSAvoidcoverage area
Core Design Contradiction:
ProductivityVSArea of stationary object

Solution Approach 1:

The patent introduces a relay client device as an intermediary to forward data between the access point and the mobile client device. This mediator extends the effective coverage area of high-frequency signals by creating a multi-hop communication path, where the relay device receives high-frequency signals from the access point and retransmits them to the mobile device, thereby overcoming the limited coverage area of high-frequency signaling.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent transforms the traditional single-hop direct communication model into a multi-dimensional relay communication architecture. By introducing spatial dimensionality with intermediate relay nodes, the system creates multiple communication paths and extends coverage beyond the direct line-of-sight limitations of high-frequency signals, effectively adding a dimensional aspect to signal propagation.

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

2Productivity

If high frequency signaling is used to enable higher throughput, then data throughput is improved, but signal reliability is reduced due to susceptibility to physical obstacles

Engineering Contradiction:
Improvedata throughputVSAvoidsignal reliability
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The relay client device acts as an intermediary that receives high-frequency signals from the access point and retransmits them to the mobile client device. This mediator approach allows the system to bypass physical obstacles that would block direct high-frequency signals, as the relay device can be positioned to establish alternative communication paths around obstacles, thereby maintaining signal reliability while preserving high throughput capability.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent dynamically changes communication parameters by selecting different relay devices based on current channel conditions, obstacle positions, and device locations. This parameter adaptation allows the system to optimize signal reliability by adjusting the relay path selection in response to changing environmental conditions, maintaining reliable communication despite the presence of physical obstacles.

Inventive Principle:
Principle #35Parameter changes

3Device complexity

If direct communication between access point and mobile device is used, then device complexity is minimized, but data transfer reliability is reduced in challenging environments

Engineering Contradiction:
Improvecommunication system complexityVSAvoiddata transfer reliability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent introduces a relay client device as an intermediary node in the communication path. This adds minimal complexity to the system architecture while significantly improving data transfer reliability in challenging environments. The relay device simply forwards data packets between the access point and mobile device, requiring straightforward protocol implementation and maintaining compatibility with existing wireless communication standards.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The relay client device is selected from existing client devices in the network, utilizing their own processing and transmission capabilities to provide relay services. This self-service approach minimizes the need for dedicated relay infrastructure, as ordinary client devices can voluntarily or automatically serve as relays based on their current state and capabilities, thereby adding minimal complexity to the overall system.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS11399311B2Scheduling relay of traffic between access point(s) and client device(s)
Publication Date: 2022.07.26 CISCO TECHNOLOGY INC
  • US11399311B2 patent drawing
  • US11399311B2 patent drawing
  • US11399311B2 patent drawing

AI summary

Various embodiments herein disclose scheduling relay of traffic. The method comprises, selecting a second client device from a plurality of client devices. The second client device is located in communication range of the first client device. The first client device is communicating a first portion of a data flow, via a first wireless link, with a first access point of the one or more access points. The method comprises, in response to determining satisfaction of one or more relay criteria: directing the first access point to generate a second wireless link with the second client device; and directing the first access point to provide first metadata including a first set of relay instructions. The first set of relay instructions instructs the second client device to relay a second portion of the data flow between the first access point and the first client device via the second wireless link.