Satellite Set-Top Box LTE Coexistence via Channel Allocation
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Solution Overview
Problem
Satellite set-top boxes with integrated LTE modules experience interference due to overlapping frequency bands between LTE frequency bands and satellite transponder frequency bands, leading to decoding failures of satellite channels.
Innovation Solution
The system employs a method where the set-top box identifies overlapping LTE frequency bands and communicates this information to the Outdoor Unit (ODU), allowing the ODU to allocate non-overlapping satellite channels, thereby preventing interference and ensuring seamless coexistence of satellite and LTE signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE modules are integrated into satellite set-top boxes to enable additional communication services, then service versatility and user capability are improved, but frequency band overlap between LTE and satellite transponder bands causes signal interference and decoding failures
Solution Approach 1:
The system performs preliminary identification of overlapping frequency bands between LTE and satellite transponder channels before channel allocation occurs. The set-top box determines which satellite channels would cause interference with LTE operations and communicates this information to the ODU in advance, allowing the ODU to allocate non-overlapping channels and prevent interference before it occurs.
Solution Approach 2:
The set-top box acts as an intermediary between the LTE module and the ODU, identifying frequency band conflicts and transmitting this information to the ODU. This intermediary role allows the system to coordinate channel allocation and prevent interference without requiring direct modification of the LTE or satellite signal paths.
2Device complexity
If satellite channels are allocated without considering LTE frequency bands, then channel allocation simplicity is maintained, but decoding failures occur due to frequency overlap and interference
Solution Approach 1:
The system performs preliminary identification of overlapping frequency bands between LTE and satellite transponder channels before channel allocation occurs. The set-top box determines which satellite channels would cause interference with LTE operations and communicates this information to the ODU in advance, allowing the ODU to allocate non-overlapping channels and prevent interference before it occurs.
Solution Approach 2:
The set-top box provides feedback to the ODU about which satellite channels overlap with LTE frequency bands. This feedback mechanism enables the ODU to adjust channel allocation decisions and avoid assigning channels that would cause interference, thereby maintaining both simplicity and reliability in the channel allocation process.
Data Source
AI summary
Systems and methods of handling satellite channel and LTE coexistence are provided. A first device can identify at least one first frequency band. The first device can determine that at least one second frequency band of a plurality of second frequency bands overlaps with the at least one first frequency band. In response to determining that the at least one second frequency band overlaps with the at least one first frequency band, the first device transmits a message including an identifier of the first device and an indication of the at least one second frequency band to a second device. The second device receives the message. The second device, in response to receiving a channel request from the first device, allocates, from the plurality of second frequency bands, a second frequency band different from the at least one second frequency band.