Mobile Relay Backhaul Link Adaptation
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Solution Overview
Problem
Mobile relays face challenges in efficiently transmitting and receiving data due to varying states of the backhaul link, leading to communication issues when the link quality is poor.
Innovation Solution
A mobile relay system that includes a base station communication unit, a sensing unit to monitor the backhaul link state, and a control unit to determine and adjust the transmission mode and format of terminals based on the sensed link state, allowing for adaptive data management and prioritization of connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a mobile relay is used to eliminate shadow areas and improve coverage, then the coverage area is enlarged, but data communication fails when the backhaul link state is bad
Solution Approach 1:
The mobile relay dynamically adjusts the transmission mode and format of terminals based on the real-time state of the backhaul link. When the backhaul link quality is good, higher order modulation and coding schemes are used; when quality degrades, the system switches to more robust transmission modes to maintain reliable communication.
Solution Approach 2:
The system changes transmission parameters (modulation order, coding rate, MIMO layers) according to the backhaul link state. The base station communication unit receives backhaul link state information and adjusts terminal transmission parameters accordingly, ensuring reliable communication under varying backhaul conditions while maintaining expanded coverage.
2Device complexity
If transmission parameters are fixed for terminals, then device complexity is reduced, but efficient data transmission cannot be achieved when backhaul link state varies
Solution Approach 1:
The base station communication unit receives feedback about the backhaul link state and uses this information to determine appropriate transmission modes and formats for terminals. This feedback mechanism allows the system to adapt transmission parameters dynamically without requiring complex terminal-side decisions, maintaining low terminal complexity while achieving high transmission efficiency.
Solution Approach 2:
The base station acts as an intermediary that receives backhaul link state information and translates it into terminal transmission parameter configurations. This intermediary approach centralizes the complexity of adaptation logic in the base station while keeping terminals simple, resolving the contradiction between complexity and efficiency.
Data Source
AI summary
The mobile relay according to one embodiment of the present invention comprises: a base station communication unit for transmitting/receiving data to/from a base station through a backhaul link; a sensing unit for sensing the state of the backhaul link; a control unit for determining a transmission mode and a transmission format for a terminal in view of the sensed state of the backhaul link; and a terminal communication unit for transmitting the determined transmission mode and transmission format to the terminal.