Call admission control for non-geostationary orbit satellite networks and other capacity-varying networks
✍ Scribed by Siwko, J. ;Rubin, I.
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 235 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0737-2884
No coin nor oath required. For personal study only.
✦ Synopsis
Many networks, such as non-geostationary orbit satellite (NGOS) networks and networks providing multi-priority service using advance reservations, have capacities which vary over time for some or all types of calls carried on these networks. For connection-oriented networks, call admission control (CAC) policies which only use current capacity information may lead to excessive and intolerable dropping of admitted calls whenever the network capacity decreases. Thus novel CAC policies are required for these networks. We present the admission limit curve (ALC) and prove it is a constraint limiting the conditions under which any causal CAC policy may admit calls and still meet call dropping guarantees on an individual call basis. The ALC also leads to a lower bound on the call blocking performance achievable by any causal CAC policy which provides dropping guarantees to individual calls. Also, we introduce a new CAC policy which uses knowledge of future capacity changes to provide dropping guarantees on an individual call basis and which achieves blocking performance close to the lower bound.