VIRTUALIZATION USE CASE SCENARIOS
As a self-contained core network that supports flexible, modular, and linear scaling, VCM can be used in many scenarios that are either impossible to support or are not cost effective in traditional core network architecture.” To “As a self-contained core network that supports flexible, modular, and linear scaling, VCM can be used in many scenarios that are either impossible to support or are not cost effective in traditional core network architecture. The use cases described below require different and independent dimensions of scale for number of subscribers, signaling volume and throughput. VCMs unique design supports this unprecedented flexibility.
SMALL CELL – STADIUM/CAMPUS
The stadium has unique characteristics in terms of traffic needs since the stadium is only used certain number of times throughout the year but when there are events in the stadium, large crowd want to access broadband data at the same time. This poses a challenge in capacity planning in both radio network and core network. Alternative access like Wi-Fi access points and/or small cells can be used to provide additional capacity for radio access. However this still does not solve the problem of huge fluctuating level of capacity needed at the core network. In fact, the use of small cells causes more challenges for the core network since traditional core network is not designed to support large number of eNBs directly, and the small cell concentrators are needed to address this issue – adding one more node in the network.
With VCM, it is possible to address concentrated traffic created in the stadium across small cells and as it moves to macro network when users leave the area at the end of event.
The radio network and backhaul are expensive resources. When the population and traffic is dense, e.g. in a city area, the utilization of the radio network is high and it requires cell splitting and the resulting deployment ends up having a large number of eNBs connected to the core involving short or long backhaul depending whether the packet core located is in the same or different city. Given the volume of usage, typically high capacity backhaul is needed.
In rural areas where the number of eNbs is small but the nodes are dispersed across geographies, the backhaul is almost always long. In such scenarios the backhaul cost from those eNBs to the central data center where the packet core resides would increase dramatically and this becomes a constant operating cost for the service providers.
With VCM, it is possible to deploy a regional core network dedicated to certain rural or remote areas. With the centralized packet core model, each eNBs need to be connected to central data center where all the EPC nodes are which causes huge backhaul cost. Studies have shown that most traffic is local and especially so with content caching solutions. In contrast, with VCM the whole EPC is distributed and the data traffic is routed to the local Internet POP so that there is no need to backhaul volumes of data traffic. Moreover such VCM based distribution also removes signaling concentration.
Demand in connectivity from tablets, eReaders, gaming devices, eHealth monitoring, and other M2M devices is rapidly rising. These “connected devices” cover diverse use cases across disparate vertical industries e.g. smart meters are chatty and stationary but connected cars could be data intensive and highly mobile. Therefore, the mobile network needs to provide an efficient way to support these various use cases and to utilize the connectivity and network resources efficiently. Furthermore the introduction of connected devices can happen within a very short period of time (e.g. 1 million sensors activated citywide) as compared to gradual increase in human subscribers. .
This makes it hard for the service providers to engineer the required number of network nodes and this in turn can be a blocking factor to introduce new services. Moreover the traditional nodes have “locked” dimensions, e.g. 10M Subs, 10K sessions/second and 20Gpbs throughput. If there 100M M2M sensors with little activity, one would need large session and tunnel capacity but not necessarily throughput. Increasing the core network capacity to support these new types of devices and services could take months; hence delay in service introduction.
This makes a compelling case for Connectem’s innovative cloud based solution that provides scalable and cost-effective connectivity in an elastic manner. Furthermore the VCM allows dimensions to be scaled across Control Plane, Data Plane & Subscriber database independently of each other.