To help operators maximize HSPA peak rate delivery, improve HSPA service delivery, and enhance the overall user experience, Celtro has developed unique Virtual Bonding a Patents Protected technology, optionally available in all DynaMate products.

Unlike traditional bonding, Celtro’s Virtual Bonding allows traffic bonding over heterogeneous links - transport (E1 and Ethernet) and infrastructure (XDSL, microwave, and fiber).

How does it Work?
The Virtual Bonding mechanism bonds together physically separated links that may belong to different networks into one virtual backhaul pipe with a peak rate delivery that equals the accumulated peak rates of the various links. Virtual Bonding can bond together links like ADSL2+, SHDSL, traditional E1s or E1 and Ethernet over microwave into one high-capacity backhaul pipe that carries HSPA traffic between the cell site and the RNC.

At the ingress to the Virtual Bonding mechanism, the single HSPA traffic flow is distributed over the bonded links based on link priority and available throughput. At the egress, the HSPA flow is reassembled, maintaining the original order. Delay is aligned to prevent jitter, and HSPA traffic flow is delivered to its destination. Virtual Bonding also provides load sharing between the different bonded links, enabling traffic protection in case of link degradation or failure.

Sample Application
A simple application of Virtual Bonding is scaling of the offload architecture to support HSuPA. In a typical offload solution in Europe, HSDPA traffic is offloaded cost-effectively by means of ADSL2+. But with the introduction of HSuPA, the ADSL2+ is no longer sufficient because of limited uplink throughput. With Celtro’s Virtual Bonding, however, a single E1 can be bonded with ADSL2+ to increase uplink throughput from 1Mbps to 3Mbps, or 2 additional E1s can be bonded with ADSL2+ to increase the uplink throughout to 5Mbps.

Virtual Bonding Benefits