Relay Station Timing Control for Multi-Hop Networks
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Solution Overview
Problem
In wireless communication networks, relay stations face inefficiencies due to fixed timing transitions between transmit and receive states, which do not account for varying one-way propagation delays, leading to suboptimal bandwidth utilization and communication disruptions in dead zones.
Innovation Solution
Implementing a method to control relay stations in multi-hop networks by adjusting transition times between transmit and receive states based on one-way propagation delays, ensuring that relay stations end a transmit zone before starting a receive zone and vice versa, with specific timing adjustments depending on the physical layer transition times and propagation delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed timing transitions are used between transmit and receive states, then device complexity is reduced, but bandwidth efficiency deteriorates and communication disruptions occur in dead zones
Solution Approach 1:
The patent applies dynamics by making the transmit and receive zone timing flexible rather than fixed. The base station dynamically adjusts the timing of transmit and receive zones for different relay stations based on their specific propagation delays. This allows the system to adapt timing parameters to match the actual radio conditions, thereby improving bandwidth efficiency and eliminating dead zones without requiring overly complex device architecture
Solution Approach 2:
The patent changes the timing parameters (transmit zone end time and receive zone start time) based on propagation delay measurements. By adjusting these parameters dynamically according to the specific propagation characteristics of each relay station, the system optimizes bandwidth utilization and ensures continuous communication coverage, resolving the contradiction between simplicity and efficiency
2Reliability
If relay station switches immediately between transmit and receive states, then loss of time is reduced, but communication reliability deteriorates due to dead zones
Solution Approach 1:
The patent applies preliminary action by having the relay station end its transmit zone before the base station's transmit zone ends, and similarly ending its receive zone before the base station's receive zone ends. This advance timing adjustment ensures that the relay station completes its transmissions and receptions in time to avoid dead zones, improving communication reliability without excessive transition delays
Solution Approach 2:
The system uses feedback from propagation delay measurements to adjust the timing of transmit and receive zones. The base station measures the propagation delay to each relay station and uses this feedback information to optimize the timing parameters, ensuring reliable communication while minimizing unnecessary transition time
Data Source
AI summary
A method of controlling a relay station in a cell of a multi-hop relay network in accordance with a one-way propagation delay between a base station in the cell and the relay station. A relay station in a cell of a multi-hop relay network including means for controlling the signal flow between the relay station and the various other stations in the cell in accordance with a one-way propagation delay between a base station in the cell and the relay station.