Dynamic Path Switching in Wireless Systems
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Solution Overview
Problem
In wireless communication systems, existing technologies face challenges in efficiently switching between direct device-to-device (D2D) and default cellular paths due to varying radio channel quality and terminal mobility, leading to data congestion and suboptimal network throughput.
Innovation Solution
A method and apparatus for controlling the switching between direct and default paths in a wireless communication system, involving channel quality measurement, signaling, and network entity management to determine and manage D2D pair candidate information, allowing seamless switching based on channel conditions and network load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct path communication is used between terminals, then network throughput increases and radio resources are used effectively, but communication efficiency deteriorates when distance between terminals is great due to radio channel quality deterioration
Solution Approach 1:
The system dynamically switches between direct path and default path based on real-time channel quality measurements. When channel quality is good, direct path is used for high throughput; when channel quality deteriorates (e.g., large distance), the system transitions to default path to maintain communication efficiency. This dynamic adaptation resolves the contradiction between maximizing throughput and maintaining reliability under varying conditions.
Solution Approach 2:
The system changes the communication path parameter based on channel quality conditions. By measuring channel quality and comparing it against thresholds, the system selects appropriate communication paths (direct or default) to optimize both throughput and reliability according to current radio conditions.
2Productivity
If direct path communication is used, then data congestion is reduced, but it becomes necessary to switch to default path when terminal moves to guarantee mobility
Solution Approach 1:
The system dynamically monitors terminal mobility and channel conditions, switching from direct path to default path when mobility detection indicates terminal movement. This ensures that while direct path is used for optimal throughput during stationary conditions, the system adapts to maintain service continuity and mobility support when terminals move.
3Reliability
If switching between direct path and default path is implemented, then communication efficiency is optimized based on channel quality, but system complexity increases due to path management and signaling
Solution Approach 1:
The terminal autonomously performs channel quality measurements and determines whether switching to direct path is beneficial, then reports this determination to the network. This self-service approach reduces network entity complexity while still achieving optimized communication efficiency based on channel conditions.
Solution Approach 2:
The terminal acts as an intermediary that performs local channel quality assessment and makes preliminary switching decisions, then communicates with the network entity. This distributes the path management complexity from the network entity to the terminal, reducing overall system complexity while maintaining optimized communication efficiency.
Data Source
AI summary
A method for controlling a path between terminals in a wireless communication system includes measuring a channel quality of a direct path with the another terminal when receiving a request for measuring the channel quality of the direct path from a higher entity, transmitting a first message comprising a result of the measuring the channel quality to the higher entity, and, when receiving a second message to instruct to switch to the direct path from the higher entity, setting the direct path with the another terminal. another embodiments including a terminal and a network entity are also disclosed.