Wireless Relay Network Synchronization via Delay Data
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Solution Overview
Problem
In relay-based wireless communication systems, there is a need to ensure synchronous transmission of broadcast data packets across transmission paths of varying lengths, as the final relay stations receive and transmit data at different times due to differing transmission latencies, leading to asynchronous data receipt at subscriber stations.
Innovation Solution
A network coordinator calculates and disseminates target delay data along transmission paths to synchronize data transmission, ensuring that messages are transmitted at a coordinated target transmission time across all paths, using a method that involves collecting delay data from nodes, calculating total transmission path delays, and disseminating target delay data to access nodes to synchronize data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If relay-based systems are used to expand wireless coverage, then service availability is improved, but transmission latency varies across different paths causing asynchronous data delivery
Solution Approach 1:
The network coordinator performs preliminary actions by calculating total transmission path delays for all paths before data transmission begins. It determines target transmission times in advance and notifies access nodes, allowing them to prepare for synchronous transmission at the coordinated time rather than reacting after receiving data asynchronously
2Area of stationary object
If multiple transmission paths are used to reach subscriber stations, then network coverage is expanded, but data arrives at different times at the final relay stations
Solution Approach 1:
The system implements feedback mechanisms where access nodes report their actual transmission times to the network coordinator. This feedback allows the coordinator to calculate accurate total transmission path delays and adjust target transmission times accordingly, ensuring that data from multiple paths arrives simultaneously at subscriber stations despite varying path lengths
3Adaptability or versatility
If broadcast data is transmitted through relay stations with varying path lengths, then data reachability is improved, but synchronous transmission is lost
Solution Approach 1:
The network coordinator changes the transmission time parameter dynamically for each path based on its length. By calculating total transmission path delays and adjusting target transmission times accordingly, the system transforms asynchronous transmission into synchronous transmission while maintaining data reachability across all paths
Data Source
AI summary
A method for performing wireless communication in a network by at least one of a plurality of network nodes, the network including a network coordinator, the plurality of network nodes, and a plurality of subscriber stations. The method includes sending, by at least one of the plurality of network nodes, delay data to at least one of the network coordinator or one or more upstream network nodes. The delay data includes a network node delay data associated with the at least one of the plurality of network nodes, and the one or more upstream network nodes include any of the plurality of network nodes located along an upstream transmission path between the at least one network node and the network coordinator. In addition, the method includes receiving, from at least one of the network coordinator or the one or more upstream network nodes, target delay data, and receiving, from at least one of the network coordinator or the one or more upstream network nodes, a message. Further, the method includes transmitting, at a target transmission time, the message to one or more of the plurality of subscriber stations. The target delay data is based on the delay data, and the target transmission time is based on the target delay data.