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adaptation mechanism

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Experimental Evaluation of Application Performance With 802.11 PHY Rate adaptation mechanisms in Diverse Environments: This paper examines the impact of physical layer rate adaptation mechanisms on the performance of real applications over 802.11 wireless links in diverse channel environments. The evaluations are based on a testbed with real wireless devices equipped with commodity 802.11 hardware and a hardware channel emulator. The paper considers two...; Tags: IEEE 802.11, Performance, Environment, Hardware, Adaptation Mechanism, Wireless LANs, Wi-Fi, Wireless, Performance Management, Human Resources, Workforce Management; White papers 2006-08-18

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Impact of Upper Layer Adaptation on End-to-End Delay Management in Wireless Ad Hoc Networks: A good amount of research has been developed to support QoS issues in IEEE 802.11 ad hoc networks, such as QoS routing, MAC layer QoS support, and cross-layer QoS design. However, QoS solution at upper layers for real-time multimedia applications is overlooked. This paper investigates impact of the adaptation mechanisms...; Tags: QoS, Middleware, Wireless, Layer Adaptation, Middleware Adaptor; White papers 2006-02-03
An Empirical Study on Language Model Adaptation Using a Metric of Domain Similarity: This paper presents an empirical study on four techniques of language model adaptation, including a Maximum A Posteriori (MAP) method and three discriminative training models, in the application of Japanese Kana-Kanji conversion. The authors compare the performance of these methods from various angles by adapting the baseline model to four...; Tags: Adaptation, Training, Workforce Management, Productivity, Human Resources; White papers 2005-06-10
Delay-Constrained Rate Adaptation for Robust Video Transmission Over Home Networks: This paper considers rate adaptation for robust transmission of high-quality video over home networks, in particular IEEE 802.11 wireless LANs. The approach includes on-line estimation of the time-varying bandwidth available at the application-/transport-layer. The paper proposes a delay-constrained rate adaptation algorithm to select an optimal bit rate, subsequently enforced by...; Tags: Georgia Institute Of Technology, Network, Home Network, Adaptation, Video, Corporate Communications, Marketing; White papers 2005-05-11
Fast-Responsive Link Adaptation for IEEE 802.11 WLANs: This paper proposes a truly-adaptive fast-responsive link adaptation scheme for IEEE 802.11 WLANs (Wireless LANs). The key idea is to direct the transmitter station's rate-increasing attempts in a controlled manner such that the responsiveness of the link adaptation scheme can be guaranteed with minimum number of rate-increasing attempts. Since the...; Tags: IEEE 802.11, Transmitter, Adaptation, Idea, Wireless LANs, Wi-Fi, Wireless; White papers 2005-09-15

Peer Group-Based Dependency Management in Service-Oriented Peer-to-Peer Architectures: Dependency management in service-Oriented peer-to-Peer architectures aims at handling functional dependencies between a public service hosted by a service providing peer and all consumer peers that rely on that service. The analysis of dependencies on consumer peers is important for supporting the adaptation of a public service. The uncoordinated adaptation...; Tags: Adaptation, Dependency, Service, Peer To Peer (P2P), Internet; White papers 2005-09-30
A Content Classification and Filtering Server for the Internet: The amazing growth of the Web in recent years, which includes content inappropriate for some classes of users, has gone hand in hand with increasingly sophisticated mobile access devices (e.g., cell phones). In this context, a major challenge is the dynamic adaptation of content, which allows these devices to access...; Tags: Association For Computing Machinery, Classification, Internet, Content Management, Servers, Enterprise Software, Software, Hardware; White papers 2006-04-23
Semantic Adaptation of Schema Mappings When Schemas Evolve: Schemas evolve over time to accommodate the changes in the information they represent. Such evolution causes invalidation of various artifacts depending on the schemas, such as schema mappings. In a heterogeneous environment, where cooperation among data sources depends essentially upon them, schema mappings must be adapted to reflect schema evolution....; Tags: Schema, University Of Michigan, Schema Mapping; White papers 2005-06-13
LDA+ TCP-Friendly Adaptation: A Measurement and Comparison Study: This paper presents an end-to-end adaptation scheme, called the enhanced Loss-Delay based Adaptation algorithm (LDA+) for regulating the transmission behavior of multimedia senders in accordance with the network congestion state. LDA+ uses the Real-time Transport Protocol (RTP) for collecting loss and delay statistics which are then used for adjusting the...; Tags: Adaptation, TCP, Berlin, LDA+, Tcp/Ip, Networking; White papers 2007-01-01
Quality-of-Service Driven Power and Rate Adaptation for Multichannel Communications Over Wireless Links: This paper proposes a Quality-of-Service (QoS) driven power and rate adaptation scheme for multichannel communications systems over wireless links. In particular, the paper uses multichannel communications to model the conceptual architectures for either diversity or multiplexing systems, which play a fundamental role in physical-layer evolutions of mobile wireless networks. By...; Tags: QoS, Adaptation, IEEE, Wi-Fi, Wireless; White papers 2006-07-10
On Enriching Ajax With Semantics: The Web Personalization Use Case: With the dawn of Ajax the capabilities of tracking user behavior multiplied. The same holds for the capabilities of adapting the user interface in a Web browser. To provide meaningful adaptation, the events, context and elements of an Ajaxified Portal must be given meaning. This paper shows the use of...; Tags: Web, Use Case, Adaptation, Personalization, Ontology, AJAX, Portals, Strategy, Internet, Software/Web Development, Web Development, Web 2.0, Management; White papers 2007-03-16
Bestseller (exe): During the writing process you can choose from 9 different genres (Action/Adventure, Crime, Erotica, Fantasy, Horror, Mystery, Science Fiction, Thriller or Western), 2 categories (Fiction or Non-Fiction), and select from 8 different book types (including Autobiography, Biography, Novel, Screenplay, Short Story, Comic Book (Adaptation), Film/TV (Adaptation), or Video Game (Adaptation))....; Tags: Adaptation, Games, Corporate Communications, Personal Technology, Marketing; Software downloads 2007-06-01
A Window-Based Flow Control Mechanism Based on TCP Vegas With Explicit Congestion Notification: A window-based flow control mechanism is a sort of feedback-based congestion control mechanisms, and has been widely used in TCP/IP networks. Recently proposed TCP Vegas is another version of the TCP mechanism and has potential to achieve much better performance than current TCP Tahoe and Reno. This paper focuses on...; Tags: Mechanism, Window, TCP, Tcp/Ip, Construction, Networking; White papers 2007-11-16
Quality-of-Service Driven Power and Rate Adaptation Over Wireless Links: This paper proposes a Quality-of-Service (QoS) driven power and rate adaptation scheme over wireless links in mobile wireless networks. Specifically, the proposed scheme aims at maximizing the system throughput subject to a given delay QoS constraint. First, the paper derives an optimal adaptation policy by integrating information theory with the...; Tags: QoS, Wireless; White papers 2006-06-28
Adaptive Multilevel Coding in OFDM Systems: A link adaptation method for OFDM systems based on multilevel coding is presented. A set of multilevel codes to be used for link adaptation is constructed based on capacity-approaching LDPC codes. The performance of the suggested system is analyzed. Orthogonal Frequency Division Multiplexing (OFDM) is considered the leading candidate for...; Tags: Siemens AG, OFDM, Wireless; White papers 2005-01-27
Distributed Cooperative Rate Adaptation for Energy Efficiency in IEEE 802.11-Based Multi-Hop Networks: This paper studies the problem of using the rate adaptation technique to achieve energy efficiency in an IEEE 802.11-based multi-hop network. Specifically, it is formulated as an optimization problem, i.e., minimizing the total transmission power over transmission data rates, subject to the traffic requirements of all the nodes in a...; Tags: IEEE 802.11, Problem, Adaptation, Wireless LANs, Productivity, Wi-Fi, Wireless; White papers 2005-11-12
A Control Theoretical Approach to a Window-Based Flow Control Mechanism With Explicit Congestion Notification: A window-based flow control mechanism is a sort of feedback-based congestion control mechanisms, and has been widely used in current TCP/IP networks. Recently proposed TCP Vegas is another version of the TCP mechanism and has potential to achieve much better performance than current TCP Tahoe and Reno. However, it has...; Tags: Mechanism, Window, TCP, Tcp/Ip, Networking; White papers 2007-11-16
Delay Aware Adaptive Scheduling in Wireless LAN: In this paper, an adaptive opportunistic scheduling scheme is proposed for wireless LANs in the presence of a link adaptation scheme such as Auto-Rate Fall-back (ARF). Extensive simulation experiments and scenarios have shown that this scheme outperforms other alternatives in terms of throughput as well as adaptation to different channel...; Tags: Aware, WLAN, Adaptation, LANs, Wireless LANs, Wi-Fi, Wireless, Network Technology, Networking; White papers 2005-08-29
The Impact of IEEE 802.11 MAC Strategies on Multi-Hop Wireless Mesh Networks: This paper analyzes the impact of different MAC (Medium Access Control) and transmission rate adaptation schemes on wireless mesh networks. The considered protocols include three different MAC protocols specified in IEEE 802.11 standards, i.e., 802.11, 802.11e, and 802.11n, and three rate adaptation schemes, i.e., ARF (Automatic Rate Fallback), RBAR (Receiver-Based...; Tags: IEEE 802.11, Hewlett-Packard Co., MAC, Wireless LANs, Wi-Fi, Wireless; White papers 2006-10-18
Developing Adapters for Web Services Integration: The push toward business process automation has generated the need for integrating different enterprise applications involved in such processes. The typical approach to integration and to process automation is based on the use of adapters and message brokers. The need for adapters in Web services mainly comes from two sources:...; Tags: Web, Hewlett-Packard Co., Adapter, Web Service, Integration, Web Services, Enterprise Software, Software; White papers

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