Wireless Station Delay Adjustment for Path Diversity
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Solution Overview
Problem
Conventional multi-station simultaneous transmission systems fail to maintain path diversity when the relative position or number of wireless stations changes, leading to deteriorated transmission characteristics due to improper timing differences between stations.
Innovation Solution
A wireless transmission system where wireless stations adjust delay amounts based on response packets to ensure each station's delay difference is within a predetermined range, ensuring proper Time Difference of Arrival (TDOA) for path diversity, even when the station configuration changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-station simultaneous transmission is performed without delay adjustment, then transmission efficiency is improved, but path diversity cannot be maintained when station configuration changes
Solution Approach 1:
The system dynamically adjusts delay amounts based on real-time station configuration changes. Each wireless station determines its delay amount relative to a reference timing, allowing the system to adapt to changing topologies while maintaining proper TDOA for path diversity
Solution Approach 2:
The system changes the timing parameter (delay amount) of each station's transmission based on configuration changes. By adjusting the delay amount parameter, the system maintains appropriate TDOA values even when the number or position of stations changes, thereby preserving path diversity
2Device complexity
If fixed delay amounts are used in multi-station simultaneous transmission, then system complexity is reduced, but transmission characteristics deteriorate when station positions change
Solution Approach 1:
Instead of using fixed delay amounts, the system dynamically changes delay parameters based on station configuration. Each station determines its delay amount relative to a reference timing, allowing adaptation to position changes while maintaining proper TDOA for path diversity
Solution Approach 2:
The system transitions from static fixed delays to dynamic delay adjustment. Each wireless station determines its delay amount based on current configuration, enabling the system to maintain optimal transmission characteristics despite changes in station positions or numbers
3Reliability
If delay amounts are adjusted based on station configuration, then path diversity is maintained, but communication overhead increases
Solution Approach 1:
The system uses feedback mechanisms where wireless stations exchange information about their configuration and determine delay amounts based on received responses. This allows coordinated delay adjustment while minimizing overhead through efficient information exchange
Data Source
AI summary
A wireless transmission system capable of performing a multi-station simultaneous transmission of data, that is, simultaneously transmitting data by wireless to a plurality of stations. The wireless transmission system includes a plurality of wireless stations for transmitting/receiving data and it constitutes a system for path diversity by use of a wireless station at the transmitting end, a multipath transmission path, and a wireless station at the receiving end. At least one of the plurality of wireless stations decides, in accordance with a response packet responsive to a multi-station simultaneous transmission request packet transmitted by the wireless station or other stations, a plurality of delay amounts relative to a reference timing during the multi-station simultaneous transmission in the wireless transmission system. It is arranged that each difference between the plurality of delay amounts be greater than a predetermined delay resolution and that the difference between the maximum and minimum values in the plurality of delay amounts be smaller than a predetermined maximum delay.