Dynamic Channel Selection in Cellular Relaying
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Solution Overview
Problem
Current cellular network technologies, such as 3GPP LTE, lack flexibility in selecting between direct and relaying channels for data transmission, limiting their use beyond cell-edge extension scenarios, where relaying is primarily employed.
Innovation Solution
A device and method that allow for flexible selection between a direct channel and a relaying channel of a radio interface in a cellular network, based on various decision criteria such as signal quality, mobility, and resource optimization, enabling prioritization of the most beneficial channel for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relaying is used to extend coverage area, then the UE can connect outside the access node range, but flexibility in selecting between direct and relaying channels is lost
Solution Approach 1:
The patent implements dynamic channel selection where the UE can flexibly switch between direct and relaying channels based on current conditions. The selection is not fixed but adapts in real-time to changing signal quality, mobility state, and network conditions, resolving the contradiction between maintaining coverage extension and preserving selection flexibility.
Solution Approach 2:
The patent changes the parameter of channel selection flexibility by introducing multiple decision criteria (signal quality thresholds, mobility state indicators, power consumption levels) that allow the system to adapt between direct and relaying modes. This enables the UE to optimize channel selection based on varying operational parameters rather than being constrained to a single mode.
2Reliability
If direct channel is used for data transmission, then transmission reliability is maintained, but power consumption increases
Solution Approach 1:
The patent introduces power consumption as a dynamic parameter in channel selection decisions. By monitoring power levels, battery state, and transmission conditions, the system can switch between direct and relaying channels to optimize the balance between transmission reliability and energy efficiency, allowing the UE to maintain reliability while reducing power consumption when appropriate.
Solution Approach 2:
The patent implements dynamic adaptation of transmission mode based on real-time power conditions. When power consumption becomes critical, the system dynamically transitions to relaying mode if signal quality permits, thereby maintaining reliability while addressing energy constraints. This dynamic behavior resolves the static contradiction between reliability and power usage.
3Productivity
If relaying channel is prioritized, then resource allocation is optimized, but interference may increase
Solution Approach 1:
The patent introduces interference level as a monitorable parameter in the channel selection process. By measuring interference on both direct and relaying channels, the system can make informed decisions about whether to prioritize relaying for resource optimization or switch to direct channel to avoid interference. This parameter-based approach allows dynamic resolution of the contradiction between resource efficiency and interference management.
Data Source
AI summary
In a situation where a direct channel (191) and a relaying channel (192) of a radio interface of a cellular network (100) are available to transmit data: selecting between the relaying channel (192) and the direct channel (191).