Demarcation for Mobile Backhaul

Carrier Ethernet Demarcation for 4G and LTE Mobile Backhaul

Due to the stringent performance requirements of 4G/LTE services, demarcation devices are deployed throughout Ethernet Mobile Backhaul and Radio Access Networks (RAN) to provide carrier-class performance monitoring, fault management and timing synchronization.

Wireless Carriers rely on regional Access Operators to provide connectivity to cell towers located outside the network plant foot print. The Access Operator is expected to meet the SLA requirements of delay, delay variation, loss and availability demanded by the Wireless Carriers. To ensure the requirements are met over the Packet Switch Network of the access network operator, demarcation devices (or Network Interface Devices, NIDs) are deployed at the points of demarcation by the Access Operator to measure the Key Performance Indicators (KPI) of the access service.

4G LTE Mobile Backhaul Demarcation

In this application example, the Wireless Carrier hands off multiple Ethernet Virtual Connections (EVCs) to the Access Operator at the External Network-to-Network Interface (ENNI). Each EVC is transported across the Access Operator Packet Switch Network (PSN) and a protected fiber RAN to the cell towers. The GM4 NIDs installed at the ENNI and the User to Network Interface (UNI) at each cell tower monitor the KPI of the EVCs for the Access Operator to ensure the SLA assurances to the Wireless Carrier are met. The GM4 NIDs also provide ITU-T G.8031 linear and G.8032 ring protection switching, and IEEE 1588 timing synchronization.

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