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Increasing the throughput per user while providing load balance are the main challenges in Heterogeneous Networks (HetNet) deployments. This paper focuses on influence of the two main concepts introduced by enhanced Inter Cell Interference Coordination (eICIC): Cell Range Extension (CRE) and Almost Blank Subframe (ABS) in multi tier HetNet architectures. Based on probabilistic models that characterize...
In this paper we explore uplink connection performances in a LTE Heterogeneous Network (HetNet). We perform a set of experiments in two different LTE HetNet configurations and focus on uplink coverage and capacity within an office building. The current results are obtained in single user equipment (UE) environment but the recommendation is valid also for multi-UE environment. The analysis is based...
In Long Term Evolution (LTE) networks handover performance is of high importance. In this paper we disseminate the results obtained during several handover experiments in LTE Heterogeneous Networks (HetNet) considering for handover trigger the A3 event and different parameters: Reference Signal Received Power (RSSP) and Reference Signal Received Quality (RSRQ). We also provide recommendations for...
This paper disseminates a set of results about Heterogeneous Network field trial experiments conducted in an LTE network at 2.6 GHz and focused on coverage within an office building. Two LTE metro cells deployed in indoor as well as LTE macro cells deployed in outdoor are considered. The later rely on small transmission power levels combined with easiest deployment of small cells. We considered an...
Voices Services over Adaptive Multiuser Channels on One Slot (VAMOS) is a 3GPP feature designed to increase GSM network capacity by multiplexing a pair of two users on the same time slot. The pairing problem consists of a proper choice of the two users depending to their radio conditions. We consider a pairing strategy based on necessary transmit power for downlink under the constraint of imposed...
The Voice services over Adaptive Multiuser channels on One Slot (VAMOS) feature has the potential to double voice capacity of the existing GSM mobile communication system while maintaining backward compatibility with the legacy system. The technical method of doubling voice channel capacity is based on Orthogonal Sub-Channel (OSC) approach that allows a single radio resource to support two independent...
VAMOS (Voice services over Adaptive Multi-user channels on One Slot) technique is the next step in the evolution of GSM voice services. The new method is based on the Adaptive QPSK scheme and VAMOS subchannel power control feature, which ensure that VAMOS is fully compatible with legacy mobiles. In this paper we propose a model for VAMOS network traffic. FR (full rate) and HR (half rate) users associated...
In this paper we implement and evaluate two scheduling techniques for mixed data traffic (VoIP and Video Streaming-VS) in LTE systems. We present results regarding resources allocation and traffic evaluation (mean throughput per user) for the Best CQI scheduler and compare to those for a Round Robin (RR) scheduler. Both services are delay-critical services but by prioritizing VoIP in the Best CQI...
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