Call admission control scheme for multiclass services under rain fading for satellite networks

Abstract

Resource allocation and call admission control (CAC) are two key issues in satellite networks for multimedia applications with quality of service (QoS) guarantees. This paper introduces a new priority-based CAC scheme for multiclass services in satellite networks operating above 10 GHz, where the dominant factor limiting performance is rain attenuation, a phenomenon exhibiting both spatial and temporal variation. The proposed scheme exploits the predictability of the satellite channel and accepts a new call if sufficient resources exist for existing and new users to guarantee their QoS requirements. At the same time, it assigns higher priority to real-time users compared to non-real time ones. The performance of the proposed scheme is investigated using Markov chain to represent the satellite channel states. Analytical expressions concerning the call blocking probability under clear sky and rain conditions are derived.

Performance of Resource Management Techniques for Weather-Impacted Satellite Networks

“…Traditional CAC policies proposed in [20][21][22] are inefficient in providing QoS guarantees to multimedia connections in contemporary satellite networks due mainly to their lack of consideration of the impact of the time-varying behaviour of satellite channel on users' experience. Other proposals for CAC in satellite networks [5][6][7], where rain fading is mitigated by the adaptation of forward error correction (FEC) codes only, to the rain attenuation dynamics are not optimal in performance. A basic yet dynamic approach to admission control and link state prediction and adaptation to mitigate rain attenuation in satellite networks is presented in [23].…”

“…But the efficiency of these techniques depends on the precision with which rain attenuation statistics are captured over time. For instance, the prediction methods employed in [5][6][7][8] estimate the rain attenuation that will be experienced during a user's connection without considering that the attenuation experienced during rain events is dynamic in time. Hence, when implemented, the proposed approach may result in inefficient utilization of allocated bandwidth as accepted connections may receive insufficient or excessive bandwidth allocation.…”

Utility‐based probabilistic call admission control for complete fairness in wireless networks

“…The analysis presented can easily be extended to nonhomogeneous networks supporting multiple SCs [5,9,10]. The channel holding time for both SC calls follows the exponential distribution with mean 1= [12,13]. Although the incoming call process may not necessarily be Poisson, it has been demonstrated that non-Poisson incoming traffic models yield negligibly different results [11].…”

“…Although the incoming call process may not necessarily be Poisson, it has been demonstrated that non-Poisson incoming traffic models yield negligibly different results [11]. The channel holding time for both SC calls follows the exponential distribution with mean 1= [12,13].…”

TCP-Aware Call Admission Control in High Altitude Platforms Using Cross-Layer Design

“…In [4], an adaptive CAC algorithm for multiservice Wimax networks is introduced. In [5] and [6], cross-layer CAC algorithms for satellite networks that take into account rain fading and the users demands by considering one or two service classes, respectively, while in [7] a cross-layer analytical technique to study a CAC mechanism in wireless networks operating in Rayleigh fading is introduced.…”