Analyst Viewpoint The Core of the Mobile
Broadband Experience Most mobile operators want a common core network for 2G, 3G and 4G. Here’s why. By Gabriel Brown
The mobile data services market is on fire. With advanced devices and rapid application innovation, the quality and range of services offered to end-users are phenomenal and improving every day. Underlying this service
Gabriel Brown is a senior analyst who covers wireless at Heavy Reading. For more information, visit
www.heavyreading.com.
experience are tremendous advances in the performance of data-centric mobile broadband networks. The mobile packet core is at the center of this transformation. Its vital mobility, session management and
security functions are what make a wireless network a truly mobile network. And because it’s the conduit through which mobile users connect to applications, attention is starting to gravitate to this critical — if historically low-profile — part of the mobile network infrastructure. Broadly, there are 3 focus areas in the mobile packet core
domain where progress will enable operators to continue to improve the subscriber experience and gain a competitive commercial advantage: subscriber and traffic growth, network monetization and architecture transition.
Subscriber and Traffic Growth With demand for capacity exploding, the mobile packet core must scale in both the throughput and compute dimensions. It’s well understood that more users, each generating more
and more traffic, increase demands on user-plane capacity. But unlike the wireline world, in a mobile broadband network, user mobility, security and a sessions-based connectivity model place a far greater emphasis on control-plane scalability. Increasingly, the “transaction rate” at which packet core
equipment can communicate with devices and surrounding network elements is emerging as an important scalability metric. As a result, new requirements on vendor’s hardware and software platforms are necessary.
Network Monetization By virtue of its place in the network, its policy, charging and control functions and its traffic management capabilities, the mobile packet core is strategic to operator initiatives to monetize investments in RAN and backhaul. Whether related to charging and billing, congestion
management, quality of service or value-added services such as parental control, core network equipment must support traffic-processing capabilities. Operators can use these capabilities to layer services on to what is otherwise just a smart piece of connectivity infrastructure. Increasingly, as third-party applications and service
become more important, there’s also a need to expose these advanced service capabilities to partner organizations and developers via network APIs.
Architecture Transition The all-IP evolved packet core architecture defined for 4G/ LTE networks represents a major change relative to the 2G/3G network. With the circuit-switch domain eliminated, voice service must now be carried over the packet core alongside best-effort data traffic, increasing latency and reliability requirements on network equipment very significantly. Then the nature of the flatter network architecture itself
drives other changes. For example, the direct interface between packet core and base station increases control-plane load on packet gateways, pooling concepts change design assumptions and “fan-in” requirements increase dramatically. One further point is that these 3 aspects of mobile packet
core evolution apply across the technology generations. Recent Heavy Reading research has confirmed, without ambiguity, that the majority of operators around the world are targeting a common core network capable of simultaneous support for 2G, 3G and LTE radio access. This finding re-states the strategic importance of mobile
packet core and highlights the importance operators place on consistent yet flexible service sets and roaming/interworking between generations of technology as a way to serve as broad a range of customers as possible. n
API: Application Programming Interface
2G: Second Generation 3G: Third Generation
4G: Fourth Generation IP: Internet Protocol LTE: Long-Term Evolution RAN: Radio Access Network
TELLABS INSIGHT Q3 16
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36