DiSEqC Bridge for Multi-STB Satellite Control
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Solution Overview
Problem
Traditional DiSEqC video distribution systems cannot support multiple set-top boxes (STBs) as master devices, limiting communication between STBs and leading to issues like theft of service, as each STB is wired separately and cannot initiate communication with others.
Innovation Solution
A communication device with multiple input/output ports, transceivers, and a controller that enables controlled communication between STBs and video reception devices, allowing multiple STBs to function as DiSEqC masters through extensions to the DiSEqC protocol, enabling inter-STB communication and one-to-one communication with LNBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each STB is wired as a separate DiSEqC system to its associated LNB, then each STB can function independently, but DiSEqC communication between STBs is not possible and multiple STBs cannot share the same video distribution system
Solution Approach 1:
The patent introduces a communication device that acts as an intermediary between multiple STBs and the LNB. This device includes a controller and transceivers that enable multiple STBs to communicate with each other and with the LNB through a shared DiSEqC bus, resolving the contradiction by providing a mediating structure that supports multiple masters without requiring separate wiring for each STB
Solution Approach 2:
The communication device is designed to perform multiple functions: it serves as a DiSEqC master controller, a communication hub for multiple STBs, and an LNB controller. This multi-functional design allows a single device to support multiple STBs in the video distribution system, achieving versatility without proportionally increasing complexity
2Ease of operation
If multiple STBs are activated without regard to any other STB, then each STB can be moved to another location, but non-subscribers may receive satellite television through another video distribution system (theft of service)
Solution Approach 1:
The communication device implements a feedback mechanism where STBs register with the system and receive unique identifiers. The controller monitors communication between STBs and the LNB, tracking which STB is accessing which LNB. This feedback system enables the patent to prevent theft of service by detecting unauthorized access attempts while still allowing legitimate STB mobility within the system
Solution Approach 2:
The system performs preliminary registration and authentication of STBs before they can access the LNB. The communication device stores information about authorized STBs and their permitted LNB associations. This preliminary action ensures that only authorized subscribers can access satellite television, preventing theft of service while maintaining STB mobility for legitimate users
3Adaptability or versatility
If a traditional DiSEqC system uses a single master and multiple slaves, then communication can be initiated only by the master, but multiple STBs cannot function as masters in the same system
Solution Approach 1:
The communication device implements dynamic master-slave role assignment. The controller can dynamically designate different STBs as masters for different LNBs based on system configuration and operational needs. This dynamic role assignment allows multiple STBs to function as masters in different contexts while maintaining protocol reliability through controlled role transitions and clear master designation
Solution Approach 2:
The system changes the operational parameters of the DiSEqC protocol to accommodate multiple masters. The communication device modifies address assignment, command routing, and conflict resolution parameters to enable multiple STBs to operate as masters simultaneously or sequentially without compromising communication reliability. This includes implementing address-based routing and conflict detection mechanisms
Data Source
AI summary
A bridge is provided for connecting multiple satellite receivers to multiple accessories in a video distribution system such as a direct broadcast satellite system. The bridge is designed for interposition between multiple satellite receivers (set top boxes or STBs) and controllable accessories (e.g. LNBs or multi-switches) of the video distribution system. The bridge provides controlled communication between STBs and controllable accessories using, for example, customized vendor extensions to the DiSEqC communication protocol. The bridge includes a communication protocol transceiver for each STB port, a communication protocol transmitter for each controllable accessory port, a mailbox for each STB port, a mailbox for the bridge, and a controller, processor, processing means or processing logic controlling or regulating video distribution system communication.