Softer Handover Schemes for High Altitude Platform Station (HAPS) UMTs
نویسندگان
چکیده
An important property of high altitude platform station (HAPS) Universal Mobile Telecommunications Systems (UMTS) is that unlike terrestrial tower based systems. interference is dependent on the antenna characteristics of HAPS rather than the terrain features (i.e., shadowing) in the service area. In this paper. we exploit this unique HAPS property to propose simple and effective adaptive softer handover schemes for HAPS UMTS. Simulation results obtained show that our proposed handover schemes provide improved system performance as compared to the existing conventional non-adaptive softer handover scheme proposed for terrestrial UMTS.
منابع مشابه
Impact of Platform Motion on Soft Handover in High Altitude Platform IMT-2000 System
-In this paper, a platform motion model is proposed for simulations of high altitude platform station (HAPS) systems. Based on the model, the performance of the soft handover algorithm proposed for terrestrial UMTS is evaluated in a HAPS IMT-2000 system. The performance measures including quality of service and system overhead are discussed with different handover parameters. Through the compa...
متن کاملCentralized total received power based call admission control for high altitude platform station UMTS
One of the unique characteristics of high altitude platform station (HAPS) Universal Mobile Telecommunications System (UMTS) is that all base stations are collocated. This enables the HAPS to centrally manage the amount of interference in all cells within the coverage area and allocate resources efficiently and optimally. In this study, we propose and analyze two centralized total received powe...
متن کاملForward link power control for high altitude platform station W-CDMA system
In parallel with terrestrial and satellite wireless networks, a new alternative based on platforms located in the stratosphere has recently introduced, known as High Altitude Platforms (HAPS). HAPS are either airships or aircraft positioned between 17 and 22.5 km above the earth surface. It has capability to deliver a wide spectrum of applications to both mobile and fixed users over a broad cov...
متن کاملW-cdma via High Altitude Platform Station System
In similar with terrestrial and satellite wireless networks, a new alternative based on platforms located in the stratosphere has recently introduced, known as High Altitude Platforms (HAPS). HAPS are either airships or aircraft positioned between 17 and 22.5 km above the earth surface. It has capability to deliver a wide spectrum of applications to both mobile and fixed users over a broad cove...
متن کاملThe Effect of Platform Instability on the User Terminal and Backhaul Link Performance of HAPS-UMTS
High Altitude Platform Stations (HAPS) are a new, promising means of providing Third Generation (3G) mobile services, broadband services and TV broadcasting. One of the potential problems of the system, where aircraft technology is used, is the platform positional instability due to rotation and stratospheric winds. This may produce fluctuations in the signal level and thus degrading the perfor...
متن کامل