Showing papers by "Magnus Olsson published in 2014"

A clean slate radio network designed for maximum energy performance

Abstract: This paper presents a clean slate radio network solution, that has been designed with the aim to maximize energy performance. In traditional radio network designs, the energy cost for providing coverage (idle mode functionality) is totally dominating the network energy consumption. Here, a logical separation between idle mode functions and user plane data transmission and reception will be assumed. This allows us to meet the key challenge of reducing idle mode energy consumption in the network by designing for DTX and DRX also in the network nodes. The clean slate energy optimized system design targets this challenge with a new way of transmitting system information and performing initial system access. To illustrate the technology potential of the solution a simple system level evaluation is provided. It is shown that the gain of transmitting system information in a single frequency network (SFN) format is shown to be more than 4 dB at an inter site distance (ISD) of 10000 meters. Furthermore, with certain assumptions on future hardware it is estimated that the proposed concept can reduce area power consumption with up to 95% compared to a reference system of today.

Radio network energy performance of massive MIMO beamforming systems

Abstract: This paper evaluates the technology potential of using massive MIMO beamforming as a tool to enhance energy performance of radio networks. The geometry, user bit rate, required inter site distance, area power, discontinuous transmission ratio, and relative power consumption during transmission is evaluated by means of system level simulations and the results are compared with a traditional three-sectorized deployment. The simulation results indicate that massive MIMO beamforming can reduce network area power consumption significantly; especially if the gains are taken into account in the network planning process by enabling a deployment with larger inter site distance compared to the reference three-sectorized deployment without massive MIMO antenna systems. As an example we note that 5 dB additional link budget achieved by the massive MIMO beamforming can be used to reduce network area power consumption with 50% if we design the network for a 10 Mbps cell edge user throughput target.

Systems and methods for a location server to efficiently obtain location information from a location management entity

Abstract: In one aspect there is provided a method performed by a first location management entity, LME (e.g., an MME or an SGSN), for providing location information to a location server (e.g., a GMLC). The method includes the first LME receiving from the location server a first request for location information pertaining to a terminal. The method also includes the first LME determining whether the terminal is in a connected state. The method further includes the first LME, in response to determining that the terminal is in a connected state, performing a method comprising: i) transmitting a stop paging message to a second LME; ii) obtaining the requested location information pertaining to the terminal; and iii) transmitting the obtained location information to the location server.