Terminal Repeater for MBS Signal Extension and Interference Control
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Solution Overview
Problem
The existing mobile IPTV multicast and broadcasting services face challenges in maintaining high transmission quality due to interference and radio wave propagation loss, especially in geographical areas with buildings, which limits the service area and quality of broadcasting.
Innovation Solution
A terminal is used as a repeater to amplify and forward the received MBS signal, with an interference signal extractor and amplifier to enhance the signal quality, and a controller to ensure that the amplified signal does not interfere with adjacent MBS areas, thereby improving reception quality and extending the service area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal is used as a repeater to amplify and forward MBS signals, then signal quality and service area are improved, but interference signals may be generated in adjacent MBS areas
Solution Approach 1:
The patent converts the potentially harmful amplified signal into a beneficial extension of service coverage by implementing intelligent control mechanisms. The terminal repeater amplifies signals only when interference levels are acceptable, transforming what could be harmful interference into useful signal extension for boundary area terminals.
Solution Approach 2:
The patent implements feedback control by continuously monitoring interference signal levels in adjacent MBS areas. The repeating controller adjusts or disables repetition based on real-time interference measurements, ensuring that signal amplification does not degrade overall network quality.
2Area of stationary object
If MBS zones are expanded to cover broader areas, then service coverage is improved, but transmission quality deteriorates due to radio wave propagation loss and fading
Solution Approach 1:
The patent divides the large MBS service area into smaller coverage zones by deploying terminal repeaters at strategic locations. Each repeater creates a localized high-quality signal zone, effectively segmenting the broad service area into multiple reliable coverage cells that overcome propagation loss and fading effects.
Solution Approach 2:
The terminal repeater acts as an intermediary between the base station and distant terminals. It receives signals from the base station, amplifies them, and retransmits them to terminals in boundary areas, mediating the signal transmission to overcome propagation losses over extended distances.
3Area of stationary object
If terminal repeaters amplify signals in all directions, then coverage area is extended, but excessive interference is generated for other MBS areas
Solution Approach 1:
The patent implements local quality control by directing signal amplification primarily toward the intended service area rather than uniformly in all directions. The repeating controller monitors local interference conditions and adjusts amplification accordingly, ensuring high signal quality in the target zone while minimizing interference to adjacent MBS areas.
Data Source
AI summary
There is provided a method where a terminal amplifies an MBS signal that the terminal receives using a terminal in an MBS service, transmits the amplified signal to another terminal and controls it in order to overcome the fact it is not possible to provide high quality contents over a broad area due to interference signals between MBS zones, a terminal is used as a repeater at MBS transmission time only, and an output of a repeating signal of the terminal is controlled so that an excessive interference signal for another MBS area is not generated when the terminal operates as a repeater.