TCP-Call Admission Control Interaction in Multiplatform Space Architectures

Abstract

The implementation of efficient call admission control (CAC) algorithms is useful to prevent congestion and guarantee target quality of service (QoS). When TCP protocol is adopted, some inefficiencies can arise due to the peculiar evolution of the congestion window. The development of cross-layer techniques can greatly help to improve efficiency and flexibility for wireless networks. In this frame, the present paper addresses the introduction of TCP feedback into the CAC procedures in different nonterrestrial wireless architectures. CAC performance improvement is shown for different space-based architectures, including both satellites and high altitude platform (HAP) systems.

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

“…In (16), τ m denotes the time interval that users m and i +1 coexist in the system. Therefore, this interval interests user m as to checking if he should agree to the admission of user i + 1 or not.…”

“…the design of an efficient CAC scheme should take into account the channel conditions. The design of efficient CAC schemes for HAP networks has also been dealt with in the literature [12][13][14][15][16].…”

“…In [15], a dynamic power sharing centralized admission control scheme is introduced that aims at guaranteeing fairness among all users in terms of blocked calls per cell. In [16], a TCP-aware CAC scheme is proposed but it does not take into account the variations of the physical medium. However, to the authors' knowledge, the effect of TCP on the performance of CAC schemes under rain fading has not been investigated.…”