Reza Arefi

Millimeter-Wave Evolution for 5G Cellular Networks

Triggered by the explosion of mobile traffic, 5G (5th Generation) cellular network requires evolution to increase the system rate 1000 times higher than the current systems in 10 years. Motivated by this common problem, there are several studies to integrate mm-wave access into current cellular networks as multi-band heterogeneous networks to exploit the ultra-wideband aspect of the mm-wave band. The authors of this paper have proposed comprehensive architecture of cellular networks with mm-wave access, where mm-wave small cell basestations and a conventional macro basestation are connected to Centralized-RAN (C-RAN) to effectively operate the system by enabling power efficient seamless handover as well as centralized resource control including dynamic cell structuring to match the limited coverage of mm-wave access with high traffic user locations via user-plane/control-plane splitting. In this paper, to prove the effectiveness of the proposed 5G cellular networks with mm-wave access, system level simulation is conducted by introducing an expected future traffic model, a measurement based mm-wave propagation model, and a centralized cell association algorithm by exploiting the C-RAN architecture. The numerical results show the effectiveness of the proposed network to realize 1000 times higher system rate than the current network in 10 years which is not achieved by the small cells using commonly considered 3.5 GHz band. Furthermore, the paper also gives latest status of mm-wave devices and regulations to show the feasibility of using mm-wave in the 5G systems.

Licensed shared access for wave cellular broadband communications

Millimeter Wave (mmWave) communication, taking place in the frequency bands between 30 and 300 GHz, is widely considered to be a key-enabler of future Fifth Generation (5G) Cellular Communication Systems, which will be deployed starting by the year 2020 and will provide a capacity increase up to a factor of 10,000 compared to existing network infrastructures. Main drivers for this upcoming network vision include new spectrum resources and dense network infrastructures, both building on the additional resources provided by mmWave bands. While unused mmWave spectrum opportunities are still available in some regions, it is a fact that incumbents are already taking substantial portions of the spectrum in certain areas. In the framework of this paper, Licensed Shared Access (LSA) Spectrum Sharing technology is proposed to be used as a key enabler in such cases, i.e. for managing Quality of Service (QoS) guaranteed access for future 5G cellular systems, where incumbents are maintain priority access rights to mmWave spectrum.

Global standards enabling a 5 th Generation Communications system architecture vision

A vision of a 5th Generation Wireless Communication system is presented which targets the efficient integration of multiple, heterogeneous Radio Access Technologies in conjunction with an heterogeneous cell-type deployment and the application of new spectrum bands and spectrum usage paradigms, such as advanced sharing concepts leading to Quality-of-Service guarantees for incumbents and cellular licensees. This contribution further analyzes related key standards bodies and regulation institutions which are expected to play a major role in implementing the inherent technological components. The current working status in key bodies is outlined and expected trends and directions are summarized. As a conclusion, specific actions are proposed in order to drive SG technology development, standardization and regulation in an efficient and coordinated way.