Co-location Interference Avoidance in Multi-Protocol Networks

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Solution Overview

Problem

Existing communication systems face interference issues when multiple protocols share the same communication medium, leading to degraded performance as devices accessing the medium simultaneously interfere with each other, even if they comply with different standards like Bluetooth and IEEE 802.11.

Innovation Solution

The implementation of a method where a multiple protocol communication device generates a frame indicating the duration of its access to the shared communication medium, allowing other devices to avoid accessing it during that time, thereby preventing collisions and interference by using a combination of Medium Access Control (MAC) and Physical Layer Convergence Procedure (PLCP) modules to coordinate access between different protocols.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple protocols share the same communication medium simultaneously, then communication versatility and device functionality are improved, but interference and collision between protocols occur leading to degraded performance

Engineering Contradiction:
Improveprotocol compatibilityVSAvoidcommunication reliability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces a coordination mechanism that acts as an intermediary between multiple protocols sharing the communication medium. This coordinator manages access requests from different protocols (such as Bluetooth and Wi-Fi) and arbitrates their use of the shared medium, preventing simultaneous access that would cause interference. The coordinator ensures that only one protocol accesses the medium at a time, thereby maintaining communication reliability while allowing multiple protocols to coexist.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If devices access the shared medium simultaneously according to different protocols, then communication efficiency for individual protocols is improved, but interference between devices occurs degrading overall performance

Engineering Contradiction:
Improvecommunication efficiencyVSAvoidinterference
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a preliminary action mechanism where devices declare their intent to access the communication medium in advance. Before actually transmitting data, a device sends a declaration signal indicating its protocol type and intended access duration. Other devices and the coordinator receive this declaration and can prepare to avoid conflict by deferring their own access attempts during the declared time window, thus preventing interference before it occurs.

Inventive Principle:
Principle #10Preliminary action

3Reliability

If protocols coordinate access to the shared medium, then interference is reduced, but system complexity increases due to coordination overhead

Engineering Contradiction:
Improveaccess coordinationVSAvoidcoordination mechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs a self-service approach where each protocol module within a device is responsible for generating its own access declarations and managing its own access requests. Rather than requiring a complex centralized controller to manage every detail, each protocol module autonomously declares its access needs and the device's coordinator simply arbitrates between these self-generated declarations. This reduces the complexity of the coordination mechanism while maintaining effective interference avoidance.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS7813295B2Co-location interference avoidance in multiple protocol communication networks
Publication Date: 2010.10.12 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD
  • US7813295B2 patent drawing
  • US7813295B2 patent drawing
  • US7813295B2 patent drawing

AI summary

A method includes an access point providing a request for co-location interference information to at least one multiple protocol device. The method continues with the at least one multiple protocol device obtaining co-location interference information in response to the request. The method continues with the at least one multiple protocol device providing the co-location interference information to the access point.