In IEEE 802.11 Power Saving (PS) mode specified for Independent Basic Service Set (IBSS), mobile stations announce their pending data packets within Announcement Traffic Indication Message (ATIM) window immediately after the reception of Time Synchronization Function (TSF) beacon. This paper proposed modifications to the PS mode by transmitting the TSF beacon at the end of each ATIM window. Upo...

In this paper, we study several multicast schemes in optical burst-switched WDM networks taking into consideration of the overheads due to control packets and guard bands (GBs) of bursts on separate channels (wavelengths). A straightforward scheme is called Separate Multicasting (S-MCAST) where each source node constructs separate bursts for its multicast (per each multicast session) and unicas...

In this paper, we present a novel approach to exploit the relationships among domain names to improve the cache hit rate for a local DNS server. Using these relationships, an authoritative DNS server (ADNS) can piggyback resolutions for future queries as part of the response message for an initial query. The approach improves the cache hit rate as well as reducing the total queries and response...

This paper presents an algorithm to implement point{to{ point causal order message delivery in distributed systems which does not force the sender to wait and which does not piggyback control information (such as timestamps) on messages. The algorithm is based on a message transmission protocol using low{level acknowledgements between FIFO bu ers. We show that on the one hand causal order can e...

We focus on the problem how to achieve network lifetime extension without causing serious deteriorated on network performance. A cooperative E-ARP protocol for extending network lifetime in wireless AD Hoc networks is proposed in our paper. By means of piggyback, energy information exchanges among neighbors in our scheme, which makes a little modification to traditional ARP protocol. E-ARP prot...

Modern hydraulic shock absorbers display a wealth of nonlinear effects such as hysteresis and instabilities at high flow rates. Despite their wide application in practically all vehicles, both on- off-road, universal analytical model that captures the essential absorber dynamics compressibility for various common damper architectures is lacking. This paper presents derives its system equations ...