LTE-Advanced Relaying Demonstrated in Germany

Nokia Siemens Networks has announced that it has successfully demonstrated Relaying for LTE-Advanced, which will enable operators to install additional relay stations without the need for extra backhaul facilities.

Stephan Scholz, Chief Technology Officer of Nokia Siemens Networks, said: "Demonstrating improved cell edge and indoor-user data rates is an important milestone for coverage scenarios. It further strengthens the position of LTE as the major mobile broadband technology. Consumers will enjoy an even richer user experience thanks to higher throughput everywhere in the cell, while operators will be able to deploy their networks in a more flexible and cost efficient way."

These performance enhancements have been achieved by combining an LTE system supporting a 2x2 MIMO (Multiple Input Multiple Output) antenna system, and a Relay station. The Relaying operates in-band, which means that the relay stations inserted in the network do not need an external data backhaul. They are connected to the nearest base stations by using radio resources within the operating frequency band of the base station itself. Towards the terminal they are base stations and offer the full functionality of LTE.

LTE-Advanced is currently being studied by 3GPP for Release 10 and will be submitted towards ITU-R as the 3GPP Radio Interface Technology proposal.

The improved cell coverage and system fairness - meaning offering higher user data rates for and fair treatment of users distant from the base station - will allow operators to utilise existing LTE network infrastructure and still meet growing bandwidth demands.

The demonstration has been realised by using an intelligent demo relay node embedded in a test network forming a FDD in-band self-backhauling solution for coverage enhancements. With this demonstration the performance at the cell edge could be increased up to 50% of the peak throughput.

Posted to the site on 1st December 2008