International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
LTE Handover Parameter Optimization for Self-Configuring and Self-Healing networks Meghashree D1, N Shesha Prasad2 1M.Tech
Student, 2Associate Professor Department of Electronics and Communication Engineering, BNM Institute of Technology, Bangalore, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - This paper includes an optimization of
which is applied to the receiver to be amplified. Antennas can be designed to transmit and receive radio waves in all horizontal directions equally (omnidirectional antennas) or preferentially in a particular specified direction (directional antennas). Omnidirectional antenna is the basic antenna which yields the same antenna gain irrespective of the direction of the transmitted or received signal. The Patterned antenna transmits or receives according to a particular pattern specified in the pattern file. Antenna pattern files can be specified in Open-ASCII (2-D and 3-D) and NSMA formats, in addition to the traditional format.
parameters for LTE Handover. Self-Configuring and SelfHealing networks are considered, and parameter optimization is done for the same considering Omnidirectional, Patterned ASCII 2D, Patterned ASCII 3D, Patterned NSMA antennas .The result of optimization is shown in terms of Throughput and Network delivery delay for each of the antennas. Conclusions are drawn out by comparing all the antennas and results are tabulated. Key Words: Self-Configuring Network, Self-Healing Network, LTE, handover, time to trigger, hysteresis
B. LTE Handover in SON
1. INTRODUCTION
A handover is a process in which connected cellular call is transferred from one cell site to another without disconnecting the session. By adopting the Self-Organizing Network (SON) feature, the LTE handover management for the serving cell and the neighbouring cell can be optimized. These optimizations were important in order to minimize HO failure rate. HO process in LTE can be observed through the Eventa3. Eventa3 is defined as the triggering event when a neighbouring cell offset becomes better than the serving cell. The parameter that define trigger include: a3offset, Hyteresisa3 (Hys) and Time-To-Trigger (TTT) values. The role of a3offset is to ensure the serving cell look better than its current measurement in comparison to neighbouring cell. Meanwhile Hysteresisa3 role is to make the measured neighbouring cell look worse than measured to ensure it is really strong before the User Equipment (UE) decides to send a measurement report to initiate a HO. Time-ToTrigger’s role is to avoid HO Ping-Pong effect. There are three ways of optimizing HO in LTE by:
Long Term Evolution (LTE) is a 4G wireless broadband technology developed by the Third Generation Partnership Project (3GPP) as an extension of UMTS. LTE is mainly designed for high speed data applications both in the uplink and downlink. LTE network offers about 300Mbps data rate in the downlink and about 75 Mbps in the uplink. Self-configuration mechanism is the capability to configure automatically a newly deployed station to achieve the necessary basic configuration for network operation. Whereas the self-optimize is the process where the User Equipment (UE) and the base station (eNB) measurements are employed to automatically optimize the network operations. Self-healing refers to the capability of the network to detect fault, diagnose them and to perform fault recovery action. A. Different types of Antenna’s Antenna is an electrical device which converts electric power into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter supplies an electric current oscillating at radio frequency to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals
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1) Modifying the parameter a3offset and hysteresisa3, 2) Changing the parameter Time-To-Trigger and 3) Modifying the parameter filter coefficient for eventa3. C. Types of handover procedure in downlink There are two types of handover procedure in downlink LTE
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