Local SAS for Private Enterprise Network Availability
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Solution Overview
Problem
Private enterprise networks face disruptions due to the unavailability of geo-redundant spectrum access systems (SAS) caused by backhaul failures or DDOS attacks, leading to service downtime and impact on mission-critical applications, as existing solutions fail to maintain service continuity beyond the 240-second timeout period.
Innovation Solution
Implementing a local SAS that aggregates traffic for Citizens Broadband radio Service Devices (CBSDs), monitors communication with geo-redundant SAS instances, and establishes a connection with an environmental sensing capability to switch channels and maintain operation even when geo-redundant SAS instances are unavailable, ensuring continued service for up to 24 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If geo-redundant SAS instances are used for high availability, then service continuity is improved, but service downtime occurs when backhaul failures or DDOS attacks render all geo-redundant instances unavailable
Solution Approach 1:
A local SAS instance is introduced as an intermediary between CBSDs and geo-redundant SAS instances. The local SAS receives and processes requests from CBSDs locally, and only communicates with geo-redundant SAS instances when connectivity is available. This intermediary approach allows the system to maintain service continuity even when connections to all geo-redundant instances are lost, as the local SAS can continue to serve CBSDs using its local state and configuration.
2Reliability
If a local SAS is implemented to extend operational window, then service availability is improved, but system complexity increases
Solution Approach 1:
The SAS functionality is segmented into two parts: a local SAS instance deployed at the edge near CBSDs, and geo-redundant SAS instances located centrally. The local SAS handles immediate local requests and maintains local state, while geo-redundant instances provide backup and coordination. This segmentation allows the system to distribute complexity rather than centralize it, improving availability while managing complexity through modular design.
Solution Approach 2:
The local SAS is pre-configured with initial state and configuration information from geo-redundant instances before connectivity is needed. This preliminary action includes receiving and storing SAS state, configuration parameters, and operational data in advance, so that when geo-redundant instances become unavailable, the local SAS can immediately continue operation without interruption, reducing the need for complex real-time synchronization mechanisms.
Data Source
AI summary
Various example embodiments relate to support for Citizens Broadband Radio Service (CBRS) Devices (CBSDs) in private enterprise networks based on a spectrum access system (SAS). Various example embodiments may support use of local SASs for handling access by CBSDs to the CBRS based on association of the local SASs with a regional SAS and support for data synchronization between the regional SAS and the local SASs associated with the regional SAS. Various example embodiments may support dynamic control of CBSD traffic for a set of SASs that includes multiple regional SASs and a local SAS. Various example embodiments may support a domain proxy local co-existence management policy capability configured to support control over CBRS channel assignments for CBSDs of a private enterprise network. Various example embodiments may be configured to utilize a domain proxy to support CBSDs in private enterprise networks based on SAS systems.