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Network-facilitated device to device (D2D) communication is expected to play a central role in 5th generation cellular systems, as this allows to substantially reduce the end-to-end latency in mission-critical communication use cases, but also to obtain network and spectral efficiency improvements through the exploitation of proximity gains, hop gains and reuse gains in mobile broadband scenarios...
This chapter provides a comprehensive overview on wireless communications according to the 3GPP technologies of Wideband Code Division Multiple Access (WCDMA) and High Speed Packet Access (HSPA). These technologies are used in the Universal Mobile Telecommunication Standard (UMTS) belonging to the 3rd Generation (3G) of mobile cellular solutions. The radio network controller (RNC) is a part of the...
METIS is the EU flagship project with the purpose of developing a 5G system concept that meets the requirements of the beyond-2020 connected information society and emerging applications. Within METIS project, horizontal topics (HTs) are used to build the overall system concept. Direct Device-to-Device (D2D) communication is one of the HTs and regarded as a promising technology to provide low power,...
Multiflow is a major enhancement envisioned as part of evolved HSPA. As 3GPP Release 11 is nearing its conclusion, Multiflow forms an integral element of the new set of standards. 3GPP compliant simulation studies from various stakeholders have shown a cell- edge throughput gain in the order of 40%. 3GPP simulation assumptions for Multiflow in release 11 however targeted an ideal scenario to quantify...
Even though some mobile network operators are already ramping up Long Term Evolution (LTE) networks, the biggest portion of mobile network revenues will still be generated in HSPA networks for the coming years. Also, the current exponential increase in mobile data rate demand provides a strong motivation to further evolve HSPA networks in parallel to ramping up LTE. While dual-stream MIMO was already...
One of the key enhancement elements of next generation LTE networks is the deployment of relays. Relays provide added performance gains in the form of enhanced coverage for mobile UEs situated in poor coverage areas. Relays provide coverage gains in high shadowing areas and also help reduce power consumption at the UE terminal by enabling a better communication channel. A striking aspect of relays...
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