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• Switching Solutions
• All-in-one-box Solutions
• Mobile Backhaul Challenges
• Mobile Backhaul Optimization
  • Virtual Bonding
  • QoS Classification
  • Optimal Convergence
  • 2G Traffic Optimization

Celtro’s unique Optimal Convergence starts with optimization of all traffic types by eliminating idle and redundant parts, leaving only the actual information as a variable bit rate flow. The flows of actual information are then packetized into ATM or MPLS to match the backhaul aggregation technology. All service flows of 2G, 3G, HSPA, and WiMAX are statistically multiplexed to maximize statistical gain and dynamically share the backhaul resources based on QoS prioritization.

Statistical multiplexing and dynamic sharing among backhauled services improve network efficiency and maximize capacity and service delivery throughout the backhaul network. Dynamic sharing of backhaul resources renders the backhaul network transparent to traffic demand variation between different mobile services, and to customer and traffic transition from 2G to 3G and HSPA. It also enables the rapid and cost-effective introduction of new mobile broadband services without heavy investments in new infrastructure.

Sample Usage Scenario
The figure below demonstrates the benefits of optimal convergence in the initial rollout of 3G on existing 2G infrastructure. A cell site that was initially connected with 2 E1s for 2G traffic is upgraded to 3G, requiring an additional E1.

With optimal convergence, the entire 2G and 3G traffic is carried over the two existing E1s. The figure shows traffic distribution over the E1s. The orange line describes 2G traffic after optimization and packetization, the green line describes 3G traffic, and the blue line represents the total traffic resulting from statistically multiplexing the 2G and 3G traffic.

As seen, optimal convergence improves network efficiency so that three E1s (two for 2G and one for 3G) are carried over two E1s – that is, over the existing 2G infrastructure. The dynamic sharing of backhaul resources can be seen on Sunday, when 2G traffic decreases and increasing 3G traffic takes advantage of the available backhaul capacity.

Benefits of Optimal Convergence

• Higher network efficiency, greater capacity delivery through traffic optimization, and statistical gain for both 2G and 3G/HSPA traffic
• Rapid introduction of new data services and better service delivery based on dynamic sharing of backhaul resources by all services
• Reduction in network operational costs owing to increased network efficiency and the use of a single unified backhaul network rather than multiple overlaid networks