In a real-time wireless TDMA environment, every packet generated by applications has a deadline associated with it. If the system cannot allocate enough resources to serve QoS defines the call blocking probability and handoff dropping probability, whereas at packet level, or MAC level, QoS defines the packet dropping probability and delay tolerance. the packet before the deadline, the packet wo...

A packet dropping and message tampering attack contains data which routed between source and destination. Packet dropping attack happens accidently or deliberately on network or packet switching network. Message tampering attack causes measure problem in message transmission activity, due to unauthorized party tampered message and can change message contains so it hard to detect that tampered m...

We consider policies for deciding which cells will be lost or dropped when losses occur at a nite buuer ATM node. The performance criteria of interest are the delay of transmitted (non-lost) cells, the jitter (or variability in the delay of transmitted cells), and the burstiness of lost cells. We analyze the performance tradeoos for various cell dropping policies. We show the usual the rear dro...

This paper proposes a new call admission control scheme considering the call dropping probability of ongoing calls in LEO satellite networks. Quality of service (QoS) provisioning of low handover failure probability is used in the proposed call admission control (CAC) scheme to guarantee predefined acceptable call dropping probability for each call. To ensure the call dropping probability the h...

The objective of this paper is to determine the minimum system dropping rate (or, equivalently , dropping probability) induced by TDMA schemes supporting time-constrained applications with common maximum cell delay tolerance. Expressions are derived for the induced system dropping rate for various TDMA schemes with diierent overhead and the maximum number of users than can be admitted in the ne...