OOB DAMA Access for Dynamic Spot Beam Satellite Networks
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Solution Overview
Problem
Modern satellite communication systems face challenges in providing high throughput connectivity when wide-area beams are unavailable or inaccessible, especially for mobile terminals, as existing Demand Assigned Multiple Access (DAMA) systems require network planning and resource locking, which is not feasible in dynamic spot beam or steerable beam networks.
Innovation Solution
A method and system that leverage an Out of Band (OOB) network to facilitate a DAMA request by locking to an OOB coverage area, transmitting the request through an OOB inroute, and utilizing an OOB Network Management System (NMS) to relay the request to a data network's NMS, enabling access to a DAMA channel without prior network planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wide-area beams are used for DAMA admission requests, then network coverage and accessibility are improved, but network resource locking duration increases and adaptability to dynamic beam networks decreases
Solution Approach 1:
The patent segments the beam network into two distinct types: wide-area beams for DAMA admission requests and narrow spot beams for data transmission. This segmentation allows each beam type to serve its specific function optimally without the resource locking issues that arise when wide beams are used for both admission and data transmission in dynamic networks.
Solution Approach 2:
The patent introduces an intermediary wide-area beam as a mediator between the terminal and the dynamic spot beam network. The terminal sends DAMA admission requests through the wide-area beam, which then forwards the request to the appropriate spot beam controller, enabling access to dynamic beam networks without requiring the terminal to directly lock onto moving spot beams for admission purposes.
2Ease of manufacture
If prior network planning is performed for beam networks, then resource allocation is improved, but flexibility and response time for mobile terminals deteriorate
Solution Approach 1:
The patent implements a dynamic resource allocation mechanism where wide-area beams are not permanently assigned but are temporarily activated only when DAMA admission requests are received. The wide beam resources are locked only for the brief duration needed to process the admission request and forward it to the spot beam controller, after which the resources are released for other uses, providing both ease of allocation and flexibility for mobile terminals.
Solution Approach 2:
The patent changes the temporal parameter of resource locking from long-duration (in traditional planned networks) to short-duration (only during admission request processing). This parameter change allows the network to maintain simple resource allocation procedures while simultaneously providing high flexibility for mobile terminals that may enter and exit coverage areas dynamically.
3Productivity
If narrow spot beams are used for high throughput connectivity, then data transmission performance is improved, but availability for DAMA admission requests deteriorates
Solution Approach 1:
The patent segments the communication function into two parts: wide-area beams handle DAMA admission requests (ease of operation), while narrow spot beams handle high-speed data transmission (productivity). This functional segmentation allows each beam type to be optimized for its specific purpose without compromise.
Solution Approach 2:
The wide-area beam serves as an intermediary that enables terminals to easily initiate DAMA admission requests without needing to directly acquire narrow spot beams. The wide beam acts as a access layer that bridges the terminal to the spot beam data transmission layer, making the system both easy to operate for admission and capable of high throughput for data.
Data Source
AI summary
A system and method for granting demand access to a data network from an Out of band (OOB) network, the method including: locking to an OOB inroute illuminating an OOB coverage area of the OOB network; transmitting an OOB request including a Demand Assigned Multiple Access (DAMA) request for the data network to an OOB Network Management System (NMS) via the OOB inroute; sending, from the OOB NMS, the DAMA request to a data NMS of the data network; and fulfilling the DAMA request.