Channel Assignment with handover queueing in LEO Satellite Systems based on an \Earth-Fixed Cell" Coverage
نویسندگان
چکیده
Low-Earth Orbit (LEO) satellite systems are intended to have an important part of the future generation of mobile telecommunication systems. They aim to provide di erent services to various populations of users. Each class of users requires a certain Quality of Service (QoS) and thus a given part of the shared channel resource. In this paper, LEO satellite systems based on an earthxed cell concept are considered, and di erent channel allocation strategies with handover queuing are discussed. Two channel allocation techniques have been investigated : xed and dynamic channel allocation FCA and DCA. Moreover, in order to reduce the handover failure probability, we have assumed that handover attempts can be queued. An analytical model has been derived in the FCA case considering handover queuing and different categories of users. Implementation aspects for the DCA scheme have been discussed in comparison with FCA results.
منابع مشابه
A Dynamic Channel Assignment in Low Earth Orbit Mobile Satellite Systems
Several low earth orbit (LEO) satellite constellations have been proposed for mobile satellite systems (MSS’s). Due to nonstationary coverage regions of individual LEO satellites, the offered traffic load for each cell varies continuously. The variation of the traffic load essentially requires dynamic channel assignment. Furthermore, extremely frequent handover requests require specific techniq...
متن کاملChannel Assignment with handover queueing in LEO Satellite
Low-Earth Orbit (LEO) satellite systems are intended to have an important part of the future generation of mobile telecommunication systems. They aim to provide diierent services to various populations of users. Each class of users requires a certain Quality of Service (QoS) and thus a given part of the shared channel resource. In this paper, LEO satellite systems based on an earth-xed cell con...
متن کاملAdaptive Dynamic Channel Allocation Scheme for Spotbeam Handover in LEO Satellite Networks
Among satellite systems, low earth orbit (LEO) satellite system will make an important role in new fiture communication services, because of its less propagation delay, less power consumption in the user terminal and the satellites, and efficient spectrum utilization using smaller coverage area for each satellite than geostationa y (GEO) counterpart. However, a number of mobility problems that ...
متن کاملSatellite handover techniques for LEO networks
Low earth orbit (LEO) satellite constellations could play an important role in future mobile communication networks due to their characteristics, such as global coverage and low propagation delays. However, because of the non-stationarity of the satellites, a call may be subjected to handovers, which can be cell or satellite handovers. Quite many techniques have been proposed in the literature ...
متن کاملATCR : An Adaptive Time-based Channel Reservation Mechanism for LEO Satellite Fixed Cell Systems
In this paper, we propose an Adaptive Time-based Channel Reservation mechanism (ATCR) suitable for handover and call admission procedure control in future multi-services mobile satellite systems. These systems are characterized by a high rate of handover. While guaranteeing a null handover failure probability, by using a channel reservation strategy in the cells to be crossed by the user, ATC...
متن کامل