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Ensuring High Availability and Redundancy in Carrier-Grade Architecture

This document outlines the challenges and strategies for maintaining high availability in carrier-grade platforms. It emphasizes the need for load sharing across cluster elements, eliminating single points of failure, and ensures fast response times during transaction handling. Key features include modular expandability, online software updates, geographical redundancy, and sophisticated caching mechanisms to enhance performance. The implementation of proven components like Solaris and Oracle, along with comprehensive service management, guarantees the reliability and scalability necessary for optimal service delivery.

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Ensuring High Availability and Redundancy in Carrier-Grade Architecture

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  1. c@o Reduncancy Architecture

  2. High Availability Challenges • Guarantee high availability of the service and at the same time • Short response times for handling of calls/transactions

  3. Carrier Grade Platform Availability • Load sharing over cluster elements, not only failover • No single point of failure (TSP HW/SW, OEM SW, applications) • Recovery, auditing, alarming • Online and Rolling Software Update • Distance between cluster elements up to 2 km • Geographical redundancy with rescue service (optional) • Service management with same availability as call processing Scalability (Performance and Capacity) • Parallel usage of both cluster elements • Modular expandability (nodes, CPU’s) • SW scalability for all transaction types, SS7 and IP • Sophisticated caching mechanisms to assure best-in-class setup times Reliability • Usage of proven components of Solaris, Oracle, Ulticom • Cluster-wide data replication, e.g. accounts, contexts • Single system image view onto cluster • Install Server for installation/upgrade

  4. redundant Cluster links redundant IP links redundant SS7 links High Availability (Functional view) Service Managment GUI Customer Care System IP Network SEP oracle DB mirror oracle DB account DB mirror account DB CE2 CE1 Cluster 1 Cluster 2 MSP SS7 Network IP Network SSG SSP GSN Appl. Server SMSC MMSC

  5. High Availability (Box view)

  6. High AvailabilityPrevention and Repair Strategies (1)

  7. High AvailabilityPrevention and Repair Strategies (2)

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