This paper proposes an integrated mobile IP and SIP handoff management architecture that exploits the complementary capabilities of mobile IP and SIP and thus extends the mobility functionality that is beyond either o...
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This paper proposes an integrated mobile IP and SIP handoff management architecture that exploits the complementary capabilities of mobile IP and SIP and thus extends the mobility functionality that is beyond either of them if applied solely. Furthermore, the integrated approach reduces the functionality redundancies that a simple hybrid approach tends to exhibit. The design of handoff polices for different scenarios are described. In particular, we expound our design philosophies with the example of macro terminal handoff management and perform an initial evaluation using three metrics: handoff delay, handoff reliability and handoff signalling load.
作者：
Studwell, Thomas W.IBM Corporation
Autonomic Computing Architecture and Technology Group 3039 Cornwallis Road Research Triangle ParkNC United States
With the aim of producing a switch LSI with several-hundred-Gb/s-class throughput, we first developed LAN-LSIs with 10-Gb/s-class optical input/output (I/O) buffer. The optical I/O buffer was supplied as a set consist...
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With the aim of producing a switch LSI with several-hundred-Gb/s-class throughput, we first developed LAN-LSIs with 10-Gb/s-class optical input/output (I/O) buffer. The optical I/O buffer was supplied as a set consisting of an optical-electrical package, soft or hard macros of the optical interface, and library files for a targeted CMOS technology. Using such library files, system LSI designers can implement an optical interface in their chips in a conventional design manner.
A new location update strategy for personal communication services (PCS) networks and its implementation using a genetic algorithm are proposed. Most of the practical cellular mobile systems partition a geographical r...
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A new location update strategy for personal communication services (PCS) networks and its implementation using a genetic algorithm are proposed. Most of the practical cellular mobile systems partition a geographical region into location areas (LAs) and users are made to update on entering a new LA. The main drawback of this scheme is that it does not consider the individual user mobility and call arrival patterns. Combining these factors with the LA-based approach, we propose an optimal update strategy which determines whether or not a user should update in each LA, and minimizes the average location management cost derived from a user-specific mobility model and call generation pattern. The location management cost optimization problem is also elegantly solved using a genetic algorithm. Detailed simulation experiments are conducted to capture the effects of mobility and call-arrival patterns on the location update strategy. The conclusion from this work is that skipping location updates in certain LAs leads to the minimization of the overall location management cost for a user with a specific mobility pattern and even with moderately high call arrival rate.
作者：
Entwisle, JeffreyThe Architecture Machine Group
This work is in part funded by the Computer Applications in Research Section Office of Computing Activities National Science Foundation (NSF grant No. GJ40501) in part by the Office of Naval Research Department of Navy (ONR grant No. N00014-67-A-204-0074) and in part by the IBM Corporation. Department of Architecture. Massachusettes Institute of Technology. Cambridge. MA 02139 U.S.A.
Computer graphics was conceived as, and remains for the most part, a line-drawing phenomenon. The cautious management of display lists or of in-line vector generators has captured most of the attention of researchers ...
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