A crucial open problem inS large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium. We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate...

In rate division multiple access (RDMA), transmission interval between pulses of each user, also referred as user period, is made different so that pulses transmitted by other users can be interleaved within that interval. To reduce collision probability in such scheme, each node requires to generate relative prime from which the user period is computed. We present a novel scheme to generate un...

In this paper, we study a multiple access scheme referred to as interleave-division multipleaccess (IDMA), in which interleavers are used as the only means for user separation. IDMA inherits many advantages from CDMA, such as diversity against fading and mitigation of the worst-case other-cell user interference problem. A low-cost iterative chip-by-chip multi-user detection algorithm is describ...

This paper develops a framework for simulations, where a system component is represented inthe simulation by a module of source code, isolated from the rest of the program. A message passing facility is used for inter-module communication. By writing simulations in this way, it is faster and more reliable to create simulations for comparison purposes. This idea is validated by the simulation of...

Michael S. Borella and Biswanath Mukherjee Department of Computer Science, University of California, Davis, CA 95616 Abstract A wavelength-division multiplexing (WDM) based multicasting protocol for a single-hop broadcast-and-select local lightwave network is proposed. Our approach employs a controlchannel-based media-access protocol that schedules multicast packets while incorporating arbitrar...

A wavelength-division optical vetwork (WON) is a multihop, multichannel lightwave network based on wavelength-division multiplexing. Its wavelength-selectable, multitransceiver stations can be tuned to form many different virtual topologies. We study in this paper routing and admission control in the WON. We review the performance of routing algorithms for store-and-forward, deflection, and det...

As data traffic increase rapidly, IP over WDM (Wavelength Division Multiplexing) transport will replace conventional SONET transport in current metropolitan area networks. Such networks will require new MAC protocols to efficiently share network bandwidth among multiple network nodes. This research project describes and evaluates a novel Carrier Sense Multiple Access with Idle Detection (CSMA/I...

A limited amount of bandwidth is allocated for wireless services. A wireless system is required to accommodate as many users as possible by effectively sharing the limited bandwidth. Therefore, in the field of communications, the term multiple access could be defined as a means of allowing multiple users to simultaneously share the finite bandwidth with least possible degradation in the perform...

This paper examines optical star coupled systems as a means of providing interprocessor communication. In particular, a MIMD (multiple instruction, multiple data) distributed memory parallel computer system environment is considered. Media access control protocols that maintain good performance with high capacity optical channels are investigated. Three examples of star-coupled structures are i...

Recently, “wireless last mile” has received considerable attention since it requires much less infrastructure compared to wireline alternatives such as xDSL and cable modem networks, resulting in a cost-effective solution to the Internet access. However, to date most of the considerations has been focused on densely populated urban areas although broadband service demand in sparsely populated r...