The data volume in mobile networks is booming – mostly due to the success of smartphones and tablets. LTE Broadcast is one way of providing new and existing services in areas that can at times be device dense, such as stadiums and crowded city centers. Built on LTE technology, LTE Broadcast extends the LTE/EPC with an efficient point-to-multipoint distribution feature that can serve many devices with the same content at the same time.
The Diameter protocol is used widely in all-IP networks. Nearly everything that is connected to or is part of a network uses the protocol in some way. The number of signaling messages being sent is rising rapidly, which is putting pressure on all parts of the network – and particularly on gateways, charging systems, policy servers and user-data repositories. Deploying a Diameter Signaling Controller (DSC) – a key network component – can relieve some of this pressure while boosting operational efficiency and increasing the reliability of the internal signaling network.
Unlike previous 3GPP wireless technologies, LTE has no circuit-switched bearer to support voice, so carrying voice over LTE requires a migration to a voice over IP (VoIP) solution – commonly under the umbrella of IMS. Until this migration occurs, LTE-capable handsets need to revert to 2G or 3G for voice calls: an approach that is not ideal in the long term. Driven by major operators, the voice over LTE (VoLTE) ecosystem is maturing rapidly and tracking well to target commercial timelines.
People want to be able to use their smartphones, laptops, tablets and other devices everywhere, and so they need access to 3G, 4G and Wi-Fi. Now that mobile broadband and mobile multimedia services are so popular, subscribers are beginning to expect broadband access to be available wherever they go – not just at home or in the office. People want to be able to connect from their cars, on the train, in aircraft, from remote locations, in the urban jungle and even from areas where it is difficult to provide access, such as in mines, tough terrain or subway tunnels.
LTE is rapidly emerging as the world’s most dominant 4G technology, taking mobile broadband to unprecedented performance levels. To meet expectations and predictions for even higher data rates and traffic capacity – beyond what is available in current LTE networks – a densified infrastructure is needed. There are two different approaches to heterogeneous deploy¬ment – resource partitioning and soft-cell schemes – both of which provide support for excessive range expansion.
Whatever the name – next generation LTE, LTE-Advanced or LTE Rel-10 – the next step in LTE evolution allows operators to introduce new technologies without putting existing investments at risk.
Security is a fundamental building block of wireless telecommunications systems. It is also a process – new threats are discovered over time, forcing communication systems to evolve.
How to deliver telephony services for LTE-capable devices is a topic of much debate. There are two standardized solutions that Ericsson supports for delivering these services – IMS Multimedia Telephony and circuit-switched fallback for operators that have not yet migrated to IMS/MMTel.
Multi-antenna reception and transmission is a key enabler of the high performance offered by LTE.
The transition to new mobile technologies calls for an increase in backhaul capacity. The initial rollout of LTE will require a capacity of 100–150Mbps. Future releases will increase this requirement to gigabits per second all the way to the cell site. With increasing demand for high capacity mobile data services and a simultaneous decline in revenue per bit, network operators face the challenge of providing high traffic capacity while reducing overall network costs. At the same time, profitable migration needs the availability of high-capacity backhaul solutions. This article presents two high speed technology demonstrators: one for microwave, a single carrier GbE microwave link; and one for copper, a 500Mbps vectorized VDSL2 link.
Authors: Jonas Hansryd and Per-Erik Eriksson