Matti Einari Laitila

5G small cell optimized radio design

The 5th generation (5G) of mobile radio access technologies is expected to become available for commercial launch around 2020. In this paper, we present our envisioned 5G system design optimized for small cell deployment taking a clean slate approach, i.e. removing most compatibility constraints with the previous generations of mobile radio access technologies. This paper mainly covers the physical layer aspects of the 5G concept design.

Vision for Beyond 4G broadband radio systems

Mobile communication systems have evolved over the past decades and each new generation brought new experience to the users enabled by technology innovations, while keeping some well established principles from previous generations. This trend continued up to LTE (Long Term Evolution) Advanced, the predominant 4th generation system which has just been standardized in 3GPP and is being rolled out soon. How will this trend continue to future systems which will be deployed in some 10 years from now which will be advanced enough to be called “Beyond 4G” (B4G)? This article presents how such B4G systems will look like and some key technologies they will rely on including versatile numerology, massive virtual MIMO from many base stations, both centralized and distributed architectures using fiber optics as backbone, advanced interference mitigation, cognitive self organization, and wideband RF radios.

Ethernet-based mobility architecture for 5G

A massive traffic increase is foreseen in the near future in mobile networks. Such data storm is expected to pose new challenging requirements to the existing mobile network architecture, since the traffic will be generated by a wide set of applications running on an increasingly high number of mobile devices and sensors. In this paper we propose a paradigm shift for the Evolved Packet Core for the future 5G system. By leveraging on the economy of scale of software-based ICT technologies, namely Software Defined Networking and cloud computing, we propose a hierarchically cloudified mobile network. In particular, in this paper we focus on the mobility aspects within such new architecture, proposing low latency Layer 2 solutions for the Access Network, while exploiting aggregating Layer 3 mobility functionalities in the regional and national clouds.