Decentralized Wireless Beacon Collision Avoidance

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Solution Overview

Problem

Existing wireless communication systems, such as IEEE802.11, face challenges in forming decentralized distributed wireless networks without a control station, including beacon collisions, inefficient power save modes, and lack of band reservation mechanisms, which affect system throughput and resource utilization.

Innovation Solution

A wireless communication system where communication stations transmit beacons with network information to establish a decentralized distributed network, using beacon transmission timing control and prioritization to avoid collisions, and employing auxiliary beacons to manage traffic and resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If communication stations transmit beacons at the same time in a decentralized distributed network, then network formation is achieved, but beacon collisions occur reducing system reliability

Engineering Contradiction:
Improvebeacon transmission reliabilityVSAvoidbeacon collision
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies preliminary action by having communication stations perform backoff timing before beacon transmission. Each station calculates a backoff period based on received beacon information from other stations, delaying its own beacon transmission to avoid collisions. This preliminary timing adjustment ensures that beacons are transmitted at different times, preventing harmful collisions while maintaining reliable network formation.

Inventive Principle:
Principle #10Preliminary action

2Stability of the object's composition

If communication stations transmit beacons frequently to maintain network synchronization, then network stability is improved, but power consumption increases

Engineering Contradiction:
Improvenetwork synchronization stabilityVSAvoidpower consumption
Core Design Contradiction:
Stability of the object's compositionVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by establishing fixed beacon transmission intervals for each communication station. Instead of continuous or frequent transmissions, each station transmits beacons at predetermined periodic intervals determined during network formation. This periodic transmission pattern maintains network synchronization stability while significantly reducing power consumption compared to frequent transmissions.

Inventive Principle:
Principle #19Periodic action

3Productivity

If multiple communication stations transmit auxiliary beacons for traffic management, then bandwidth utilization is improved, but system complexity increases

Engineering Contradiction:
Improvebandwidth utilizationVSAvoidbeacon management complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing auxiliary beacons that serve multiple functions simultaneously. The auxiliary beacons carry both traffic information for bandwidth management and timing synchronization data for network coordination. This multi-functionality allows improved bandwidth utilization without proportionally increasing system complexity, as a single beacon mechanism handles multiple management tasks.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS8391257B2Wireless communication system, wireless communication apparatus and wireless communication method and computer program
Publication Date: 2013.03.05 SONY GROUP CORP
  • US8391257B2 patent drawing
  • US8391257B2 patent drawing
  • US8391257B2 patent drawing

AI summary

In order to solve problems arising when a communication system such as a wireless LAN is constructed as a decentralized distributed type network without a relationship of control station and controlled stations such as a master station and slave stations, in a wireless communication system composed of a plurality of communication stations without a relationship of control station and controlled stations, respective communication stations transmit beacons with information concerning a network written thereon with each other to construct the network, and it becomes possible to make sophisticated judgment such as communication states of other communication stations by those beacons.