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In this paper, we first propose four-layer optimization for UMTS coverage area: (i) cell-oriented intra-SGSN layer, which is optimized RA areas covering the intra-SGSN signaling cost, paging cost and RA load balancing, (ii) RA-oriented intra-MSC layer, which is optimized location areas covering the intra-MSC signaling cost and LA load balancing,(iii)(More)
Provisioning dynamic traffic is a major challenge in wavelength-routed networks. While the routes of connections are mainly determined by using global state information, different connections that share the same link may still compete for the same resources. These conflicts can cause significant blocking, a problem that becomes more serious as traffic(More)
Instant Messaging (IM) emerges as a powerful communication tool, not just for teenagers but also in the enterprise. After enjoying the early benefits of the " raw " presence IM provides, we are now beginning to leverage the power of presence in combination with telephony and collaboration tools. Most " information workers " today routinely use a computer(More)
In this paper, we propose a congestion control algorithm, referred to as Upstream Resource Management Propagation algorithm for label-switched Optical Burst Switching to provide congestion control in GMPLS control-plane infrastructure. The algorithm controls the transmission control between congested node and the ingress Edge Routers. The congested node(More)
We design a protocol for paging (tracking agent based paging or TAP) IEEE 802.11 wireless LAN hosts. Mobile nodes in IEEE 802.11 BSS constitute a layer-2 paging area. The tracking agent (TA) is in charge of the paging state, and TA continuously updates the paging state after each layer-2 handoff. Paging on the wireless link is done by extended beacons, and(More)
In this paper, we use prediction algorithms to estimate the behavior of VBR video traac based on statistical short-term earthquake prediction methods. The probabilistic estimation of future inter-arrival times of peak values of MPEG-VBR video stream is considered in terms of Bayes theorem, and the Bayesian analysis of peak rate sample is evaluated on the(More)
The paper presents an analysis of the tracking component of SIP paging that has recently been introduced. Tracking protocol enables the tracking agent to keep track of the mobiles' handoffs between access points. The tracking protocol can be modeled using soft-state and hard-state approaches. We analytically compare each of these approaches for state(More)
We design a methodology for fast IPv4 and IPv6 address acquisition by mobile layer-2 entities in a wireless LAN. The main idea is to do the IP address assignment whenever it is necessary, not after the mobile establishes a layer-2 connection with a new access point. In order to achieve this, we propose to encapsulate the current IP address of the mobile to(More)
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