Wireless LAN Channel Selection for Multi-Channel Collision Reduction
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Solution Overview
Problem
Existing wireless LAN systems face challenges in effectively utilizing multiple frequency channels due to issues with network allocation vector (NAV) settings and signal collisions when using multiple channels, leading to inefficient communication.
Innovation Solution
A communication apparatus that generates and transmits request signals with channel and bandwidth information to select idle channels for data transmission and reception, using different frequency channels for different communication phases to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple frequency channels are used for data transmission to increase communication speed, then communication efficiency is improved, but signal collisions and interference increase leading to reduced reliability
Solution Approach 1:
The patent applies preliminary action by performing channel assessment and selection before data transmission. The communication apparatus evaluates multiple frequency channels in advance, identifies idle channels, and stores channel information for future use. This pre-assessment prevents signal collisions during actual transmission by ensuring selected channels are currently unused, thereby maintaining both high communication speed and reliability.
2Quantity of substance
If channel bonding technology combines multiple frequency channels to increase bandwidth, then communication capacity is improved, but complexity of channel management increases
Solution Approach 1:
The patent applies self-service by enabling the communication apparatus to autonomously assess, select, and manage frequency channels without external coordination. The apparatus independently evaluates channel availability, selects suitable channels for bonding, and adapts to changing channel conditions automatically. This self-managing approach simplifies overall system complexity while maintaining the ability to combine multiple channels for increased bandwidth.
3Reliability
If frequency channels are selected dynamically based on use state to avoid collisions, then communication reliability is improved, but time required for channel selection increases
Solution Approach 1:
The patent resolves this contradiction by performing channel assessment in advance and storing the results. The communication apparatus evaluates frequency channels before transmission, identifies idle channels, and maintains this channel information for subsequent transmissions. This preliminary channel selection reduces real-time decision overhead while ensuring reliable channel selection, thereby improving communication reliability without significant time loss.
Data Source
AI summary
A communication apparatus is provided, and the communication apparatus includes a control unit that performs control to: generate channel information relating to transmittable frequency channels of data, and bandwidth information relating to a bandwidth of a frequency to be used to transmit the data; transmit a request signal to another communication apparatus, by using a frequency channel that has been selected from the transmittable frequency channels, the request signal including the channel information and the bandwidth information that have been generated; and transmit the data to the other communication apparatus, by using frequency channels that have been selected as receivable frequency channels by the other communication apparatus. The present technology can be applied, for example, to a wireless LAN system.