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HANDOVER SCHEME FOR C/U-PLANE SPLIT HETEROGENEOUS NETWORKS IN HIGH-SPEED RAILWAY

$250-750 USD

Cerrado
Publicado hace más de 5 años

$250-750 USD

Pagado a la entrega
Currently, many countries are constructing their high-speed railway system to offer high speed transportation system for passengers those are traveling for long distance. since passengers may stay in train for long period of time, it will be attractive to provides them with data services. However, it is challenging task because all Users Equipment (UE) devices in train have to perform handover frequently at the same times. This will leads to incur network loads and degraded the network performance quality. In general when the UE communicate directly with the Evolved NodeB (eNodeB) it will suffer from a severe degradation of the quality of service due to path loss and shadowing effect as the wireless signal travailing across the train carriage. To cope with this issues, the Third-Generation Partnership project (3GPP) has supported relay communications in the Long-Term Evolution advanced (LTE-A) release 10 standard [7, 8, 9]. Indeed, using Mobile Relays (MRs) within the highspeed railway enhances the cellular coverage and overcome the moderate to high vehicle penetration loss (VPL)[10, 11] and also help to group handover procedures of (UE) devices, mobile relay also suffer from frequent handover. For example assume the train travailing with speed of 350 km/h, and going across a coverage area of a cell size of 2 km, thus the mobile relay will encounter handover every 20.6 s. It is obvious that the mobile relay will be served by the eNodeB for a very short time. Moreover, according to the specification of LTE-A [12, 13], the MR has to perform a measurement procedure before the handover procedure to insure that the signal quality from the target eNodeB is better than the serving eNodeB. The serving eNodeB made a handover decision based on the measurement results from the mobile relay MR. when the serving eNodeB decides that the MR has to handover to the target eNodeB, the core network then starts the in network handover procedure. However the current specifications shows that the measurement procedure may take a longer time period and thus, delays the handover trigger timing. In LTE-A, the measurement procedure and in network handover procedure are mainly designed for UEs with low to medium velocities and not suitable for high-speed railway (HSR). Thus, this research are mainly focused in adopting a mobile relay (MR) between the UE and the eNodeB in Control/User-Plane(C/U-plane) split heterogeneous networks architecture for high speed railway. then propose a suitable handover parameters measurement procedure and in network handover procedure for the high-speed railway in control/user (C/U) plane split heterogeneous networks to enhance the handover delay of the overall handover procedure .
ID del proyecto: 17933381

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Activo hace 5 años

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Bandera de MALAYSIA
Kota Tinggi, Malaysia
0,0
0
Miembro desde oct 10, 2018

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