The last time we were together, we discussed the prospects for urban backhaul in 2014. True, it will be a very exciting time in the 70 GHz and 80 GHz E-band frequencies. The promise of small cells is finally coming to fruition after the hype cycle had all but chewed and spit them out. Remember when you first heard of DSL and cable modem? By the time you could get one, the media had stopped talking about them for at least two years. But we’re digressing. Continue reading
For years and years, microwave and millimeterwave radio technologies have coexisted without very much overlap in either their markets or applications. Microwave radio served telephone company needs (e.g., long distance backhaul, mobile access aggregation) for the bulk of its implementations with some vertical deployments for oil and gas, public safety and utilities organizations. Typically, licensed bands in service ranged from 6GHz to 42GHz—with 11GHz and under popular for long haul; 18-38GHz trendy for short urban hops. Generally, millimeterwave radio is considered to be between the 60GHz and 80GHz bands and found its applications confined to those for intra-campus communication from building to building for universities, civic centers, other government conglomerations and large, spread-out (i.e., 1 to 5 miles) corporate facilities. Continue reading
VPNs are crucial for next-generation mobile networks as they enable 3G and 4G wireless to share a common IP infrastructure as well as support new services, according to Said Jilani, network solutions architect for Aviat Networks. And because Virtual Private Networks (VPNs) can serve multiple sites, multiple applications and multiple customers simultaneously, Jilani believes that they will form the cornerstone for the great expansion of mobile services we are only now beginning to realize.
Serving as one of Aviat Networks’ resident IP experts, Jilani functions as an internal consultant for wireless network deployment and is able to leverage the experience working with different customers in different telecom verticals. And he has seen the impact that VPNs can have in all these markets—not just among mobile operators.
Multi Protocol Label Switching
The great revolution in VPN services for mobile networks is powered by Multi Protocol Label Switching, commonly referred to as MPLS, which offers mechanisms to provide scalable VPN networks, Jilani says. MPLS VPNs come in two main types: L3 and L2 “flavors,” as Jilani terms it.
L3 or IP VPNs, based on Internet Protocol, support very important functionality such as connecting customer sites by emulating a “backbone.” The service provider VPN connects sites in part by exchanging information with customer routers. Offering a robust solution, L3 VPNs easily handle traffic handoff from site to site such as is involved with LTE (Long Term Evolution).
More on L2 VPNs
In the video below, Jilani goes on to elaborate regarding L2 VPN emulation of edge routers and point-to-point Ethernet connections and how L2 and L3 VPNs can function together. Watch it for all the detailed information.