Relay Apparatus Control for Mobile Coverage Extension
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Solution Overview
Problem
Current technologies lack an effective control technique for relay apparatuses in mobile communication systems, making it difficult to efficiently extend coverage using these devices.
Innovation Solution
A communication method and network node configuration that enables appropriate control of a relay apparatus by relaying radio signals between a base station and user equipment without demodulating and modulating the signals, and by transmitting messages over a network interface to connect the relay apparatus to another cell, thereby extending coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a repeater apparatus is used to relay radio signals in high frequency bands, then coverage extension is achieved, but control difficulty increases due to lack of effective control techniques
Solution Approach 1:
The patent introduces a control terminal as an intermediary device between the base station and the repeater apparatus. The control terminal receives control signals from the base station and transmits them to the repeater apparatus, enabling network-controlled operation. This mediator structure resolves the control difficulty by establishing a clear control chain without requiring direct complex control from the base station to the repeater.
2Object-affected harmful factors
If relay apparatuses amplify and transmit radio signals directionally, then coverage is extended with reduced interference, but device complexity increases due to signal processing requirements
Solution Approach 1:
The patent extracts the signal amplification and directional transmission functions from the repeater apparatus and implements them through network-controlled mechanisms. The control terminal and base station handle the complex signal processing decisions, while the repeater apparatus focuses on simple signal relay. This separation reduces the complexity burden on the repeater device itself.
3Productivity
If high frequency bands are used for wide-band transmission, then transmission capacity increases, but coverage reduction occurs due to high rectilinearity of radio signals
Solution Approach 1:
The patent introduces a new dimension to the transmission architecture by adding relay apparatuses that can redirect signals in different spatial directions. Instead of relying solely on direct line-of-sight transmission from the base station, the relay apparatuses create additional transmission paths, effectively expanding the coverage area while maintaining high frequency band advantages for capacity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for efficient coverage extension of base stations while minimizing interference, by effectively controlling the relay apparatuses and optimizing their operation within the mobile communication system.
Implementation Method 1
relaying a radio signal, the relay apparatus being configured to change a propagation state of the radio signal without demodulating and modulating the radio signal transmitted between a first cell and a user equipment
Data Source
AI summary
A communication method used in a mobile communication system includes: at a relay apparatus, relaying a radio signal, the relay apparatus being configured to change a propagation state of the radio signal without demodulating and modulating the radio signal transmitted between a first cell and a user equipment; and at a first network node corresponding to the first cell, transmitting a message for connecting the relay apparatus to a second cell to a second network node corresponding to the second cell over a network interface. The message includes information relating to the relay apparatus.