- Wireless Communication Networks Research
- Advanced Wireless Network Optimization
- Advanced MIMO Systems Optimization
- Network Traffic and Congestion Control
- IPv6, Mobility, Handover, Networks, Security
- Advanced Wireless Communication Techniques
- Wireless Networks and Protocols
- Mobile Agent-Based Network Management
- Optical Wireless Communication Technologies
- Mobile Ad Hoc Networks
- Multimedia Communication and Technology
- Advanced Photonic Communication Systems
- Opportunistic and Delay-Tolerant Networks
- Bluetooth and Wireless Communication Technologies
- Caching and Content Delivery
- Peer-to-Peer Network Technologies
- Service-Oriented Architecture and Web Services
- Cloud Computing and Resource Management
- Cooperative Communication and Network Coding
- Semantic Web and Ontologies
- Context-Aware Activity Recognition Systems
- Wireless Body Area Networks
- Optical Network Technologies
- Power Line Communications and Noise
- Image and Video Quality Assessment
IBM Research - Thomas J. Watson Research Center
1996-2024
IBM (United States)
1997-2009
Columbia University
1995-2000
The authors propose a computationally simple approximate expression for the equivalent capacity or bandwidth requirement of both individual and multiplexed connections, based on their statistical characteristics desired grade-of-service (GOS). purpose such an is to provide unified metric represent effective used by connections corresponding load network links. These link metrics can then be efficient management, routing, call control procedures aimed at optimizing usage. While methodology...
This article provides a detailed discussion of wireless resource and channel allocation schemes. The authors provide survey large number published papers in the area fixed, dynamic, hybrid schemes compare their trade-offs terms complexity performance. We also investigate these based on other factors such as distributed/centralized control adaptability to traffic conditions. Moreover, we reuse partitioning schemes, effect handoffs, prioritization Finally, discuss important issues overlay...
The shadow cluster concept can be used to estimate future resource requirements and perform call admission decisions in wireless networks. Shadow clusters decide if a new admitted network based on its quality-of-service (QoS) local traffic conditions. especially useful networks with microcellular architectures where service will provided users diverse QoS requirements. framework of system is completely distributed, viewed as message mobile terminals inform the base stations their...
The major focus of this paper is distributed call admission control in mobile/wireless networks, the purpose which to limit handoff dropping probability loss systems or cell overload lossless systems. Handoff are consequences congestion wireless networks. Our algorithm takes into consideration number calls adjacent cells, addition where a new request made, order make decision. This done by every base station manner without involvement network processor. condition simple enough that decision...
An architecture is presented for a high-speed cellular radio access network based on ATM transport technology. Central to this approach new concept known as the virtual connection tree which avoids need involve call processor every cell handoff attempt. Such an can readily support very high rate of handoffs, thereby enabling use physically small cells provide system capacity, but may occasionally cause volume traffic be handled by one site exceed that site's capacity. A simple analytical...
This paper introduces PARO, a power-aware routing optimization that helps to minimize the transmission power needed forward packets between wireless devices in ad hoc networks. Using one or more intermediate nodes called "redirectors" elects on behalf of source-destination pairs thus reducing aggregate consumed by devices. PARO is applicable number networking environments including sensor networks, home networks and mobile In this paper, we present detailed design evaluate protocol using...
This article provides a detailed discussion of wireless resource and channel allocation schemes. The authors provide survey large number published papers in the area fixed, dynamic, hybrid schemes compare their trade-offs terms complexity performance. We also investigate these based on other factors such as distributed⁄centralized control adaptability to traffic conditions. Moreover, we reuse partitioning schemes, effect handoffs, prioritization Finally, discuss important issues overlay...
A few years ago it was recognized that the vision of a truly low-cost, low-power radio-based cable replacement feasible. Such ubiquitous link would provide basis for portable devices to communicate together in an ad hoc fashion by creating personal area networks which have similar advantages their office environment counterpart - local network (LAN). Bluetooth is effort consortium companies design royalty free technology specification enabling this vision. This article describes and goals...
WebSplitter symbolizes the union of pervasive multi-device computing and collaborative multi-user computing. provides a unified XML framework that enables Web browsing. splits requested page delivers appropriate partial view each to user, or more accurately user's set devices. Multiple users can participate in same browsing session, as traditional conferencing groupware. Depending on access privileges user different components content page, generates personalized view. further among devices...
This article presents a framework for multimedia networking in wireless and mobile environment. We consider both application needs as well requirements, try to bridge these paradigms using an adaptive framework. Central this is the concept of representing connection terms multiple substreams each with their own specified QoS requirement making network elements (switching access points), services, protocols (signaling, control, routing) aware requirements such substreams. As resource...
Article Free Access Share on The shadow cluster concept for resource allocation and call admission in ATM-based wireless networks Authors: David A. Levine Broadband Wireless Networking Lab, School of Electrical Computer Engineering, Georgia Institute Technology, Atlanta, GA GAView Profile , Ian F. Akyildiz Mahmoud Naghshineh IBM T.J. Watson Research Center, Yorktown Heights, NY NYView Authors Info & Claims MobiCom '95: Proceedings the 1st annual international conference Mobile computing...
We introduce an adaptive call admission control mechanism for wireless/mobile networks supporting multimedia traffic, and discuss a number of resource sharing schemes which can be used to allocate wireless bandwidth different classes traffic. The reacts changing new arrival rates, the rapidly traffic conditions in every radio cell due mobility mobile users. In addition, we have provided analytical methodology shows that combination guarantees predefined quality-of-service each class One...
There is a growing interest in deploying multimedia services mobile cellular networks. Call admission control (CAC) key factor quality of service (QoS) provisioning for these services. We propose CAC which maximizes the revenue by determining call decisions each state. A semi-Markov decision process employed to model system. Also, QoS requirement such as handoff dropping probability taken into consideration. Simulations reveal that our outperforms upper limit while satisfying requirements.
Article Free Access Share on Balanced media access methods for wireless networks Authors: Timucin Ozugur Communications Systems Center, Georgia Institute of Technology, Atlanta, GA GAView Profile , Mahmoud Naghshineh IBM Thomas J. Watson Research Yorktown Heights, NY NYView Parviz Kermani C. Michael Olsen Babak Rezvani John A. Copeland Authors Info & Claims MobiCom '98: Proceedings the 4th annual ACM/IEEE international conference Mobile computing and networkingOctober 1998 Pages...
This paper addresses load balancing algorithms for the wireless links to solve fairness problem, where stations are not able gain access equally shared medium. The problem occurs mostly because of existence hidden and presumption a non-fully connected network topology. In this paper, p/sub ij/-persistent carrier sense multiple based proposed in which fair each user is accomplished using pre-calculated link probability. Link probabilities calculated at source station two ways connection-based...
Computing is an indispensable tool in addressing climate change, but it also contributes to a significant and steadily increasing carbon footprint, partly due the exponential growth energy-demanding workloads, such as artificial intelligence (AI). While hardware specialization has become primary driver of operational energy efficiency improvements, introduces new challenges including increased embodied emission, rise complexity operations heterogeneous dynamic datacenters. We posit that...
A key characteristic of personal area networks (PANs) is the premium placed on reducing power consumption device computation and communication. In such an environment some devices may be more capable communicating with others simply because their capability (i.e., reserve). We propose a "power-aware" routing protocol packets in PANs based related optimization behavior criteria. Our proposal differs from previous work wireless packet which typically aim to reduce overall usage energy consumption.
Recently there is a growing interest in adaptive multimedia networking where the bandwidth of an ongoing call variable. In this paper, we propose measurement-based admission control (CAC) which guarantees upper bound degradation probability defined herein. Our CAC measures state cellular system distributed manner and reflects observed history on making decisions. Also, adaptation algorithm to minimize presented. Simulations reveal that our outperforms limit while maintaining quality service.
Limitations to the bandwidth of wireless links has motivated development adaptive multimedia services where a call can be dynamically adjusted. A threshold-type admission control algorithm is proposed for quality service provisioning; nonlinear programming model formulated determining optimal threshold values.