Relaying Path Selection in Mobile Communication Systems
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Solution Overview
Problem
Conventional mobile communication systems lack a method to determine and select an optimal path for relaying transmission and reception data between nodes, leading to inefficient data routing.
Innovation Solution
A method where a mobile terminal transmits an uplink signal, allowing relaying nodes to measure channel quality and relay this information to a base station, which then determines and configures an optimal path by comparing direct and relayed channel qualities, and sends a relaying request message to the corresponding relaying node to configure and broadcast new broadcast information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mobile terminal transmits data directly to the base station, then the transmission path is simple and direct, but the channel quality may be poor due to distance or obstacles
Solution Approach 1:
The patent introduces relaying nodes as intermediary elements between mobile terminals and base stations. These relaying nodes receive signals from mobile terminals and forward them to base stations, providing an alternative transmission path when direct communication quality is poor. The system measures channel quality indicators (CQI) for both direct and relayed paths, allowing dynamic selection of the optimal transmission route based on current channel conditions.
2Reliability
If relaying nodes are introduced to improve channel quality, then transmission reliability improves, but the system complexity increases due to path determination and node coordination
Solution Approach 1:
The patent implements a feedback mechanism where relaying nodes measure and report channel quality indicators (CQI) to the base station. The base station receives CQI information from multiple relaying nodes and uses this feedback to determine the optimal relaying path. This feedback-driven approach allows the system to adapt to changing channel conditions while maintaining manageable complexity through centralized path determination at the base station.
Solution Approach 2:
The system performs preliminary channel quality measurements and path determination before actual data transmission. The base station proactively identifies optimal relaying nodes by measuring CQI values from multiple potential relay paths, and prepares relaying configuration information in advance. This preliminary action allows the system to switch between direct and relayed paths efficiently without complex real-time decision-making during data transmission.
3Measurement precision
If the base station determines the optimal path using CQI information from multiple relaying nodes, then the path selection accuracy improves, but the measurement and information processing time increases
Solution Approach 1:
The patent applies partial action by having the base station evaluate CQI information from multiple relaying nodes but selecting only the single best path for data transmission. While measurements are performed on multiple paths to ensure accuracy, the system does not maintain all measured paths simultaneously but rather identifies and uses the optimal one, reducing the effective processing burden while maintaining high selection accuracy.
Data Source
AI summary
A method for setting a path by a base station in a mobile communication system and a system thereof are provided. The base station measures quality of a link directly connected to the mobile terminal using the received signal, if a signal is directly received from a mobile terminal. If the signal is received via at least one relaying node, the base station calculates quality of an entire path determined taking quality of each link into account, depending on the signal received via the at least one relaying node. The base station compares the calculated quality of the entire path with the quality of the directly connected link, and determines an optimal path according to the comparison result. The base station sends a relaying request message to a relaying node corresponding to the optimal path. Upon receipt of a relaying response message from the relaying node, the base station configures new broadcast information and broadcasts the newly configured broadcast information.