11582687
Web service enablement of communication services
In this paper, we introduce Web service application session services, WS-session, for Web service based application session management in communication. A two-way Web service framework is described. It supports the use of Web service in the situation of telecommunication where the communication endpoint can be both a client and a peer-to-peer server. We describe the interface design in two-way Web service interaction based on the concept of tightly coupled interface and loosely coupled interface solutions. The proposed approach provides full support of asynchronous outbound operations and event notifications in communication services. It is implemented in a research prototype system that provides both standard based (ECMA-348) services and Avaya service extensions. In addition, we investigated the integration of our proposed approach with BPEL4WS. It allows the user to create new services through a drag-n-drop based service creation environment (ECLIPSE/BPEL4WS). It leads to a paradigm of service creation through Web service composition. More sophisticated telecommunication services are created from composing the basic services.
1165057
An Extensible Three-tier XML Dialogue System Architecture for Multimodal Interaction and Automated Agent Services
3230690
A new verification-based fast-match for large vocabulary continuous speech recognition
Acoustic fast-match is a popular way to accelerate the search in large-vocabulary continuous-speech recognition, where an efficient method is used to identify poorly scoring phonemes and discard them from detailed evaluation. In this paper we view acoustic fast-match as a verification problem, and hence develop an efficient likelihood ratio test, similar to other verification scenarios, to perform the fast match. Various aspects of the test like the design of alternate hypothesis models and the setting of phoneme look-ahead durations and decision thresholds are studied, resulting in an efficient implementation. The proposed fast-match is tested in a large vocabulary speech recognition task and it is demonstrated that depending on the decision threshold, it leads to 20-30% improvement in speed without any loss in recognition accuracy. In addition, it significantly outperforms a similar test based on using likelihoods only, which fails, in our setting, to bring any improvement in speed-accuracy trade-off. In a larger set of experiments with varying acoustic and task conditions, similar improvements are observed for the fast-match with the same model and setting. This indicates the robustness of the proposed technique. The gains due to the proposed method are obtained within a highly efficient 2-pass search strategy and similar or even higher gains are expected in other alternative search architectures.
16996391
WIP: Web Service Initiation Protocol for Multimedia and Voice Communication over IP
In this paper, we present WIP - Web service initiation protocol for multimedia and voice communication over IP. WIP is an entirely Web service based communication protocol, consisting of a set of Web service operations for initiating and establishing converged (e.g. multimedia, IM, voice, etc.) communication services over IP. It inherits the principle of separation signaling and media transmission of SIP (session initiation protocol); but it relies on a single Web service stack to provide a full featured communication signaling protocol. WIP opens a new paradigm of Web service based VoIP communication, which is extensible and can be easily integrated in end-to-end SOA solutions. The generic Web service approach used in WIP overcomes many limitations which would be otherwise difficult to achieve in non-Web service based communication methods used today. WIP is based on two-way, full duplex Web service interaction. The communication signaling establishment in WIP is through Web service interactions, and the media negotiation in WIP is modeled as a special Web service "event" subscription, which is fully extensible for various media needs. The signaling messages of WIP are encoded in the standard based SOAP message envelops which can be carried by multiple transport protocols, including HTTP. WIP supports both P2P (peer-to-peer) and B2B (back-to-back) broker mode communication services. A prototype research system has been implemented, and the results indicate that WIP, as a full Web service based communication protocol, is both feasible and advantageous
14601627
Semantic Modeling and Design Patterns for Asynchronous Events in Web Service Interaction
This paper proposes a conceptual model for modeling static and dynamic event sources by reusing the information in WSDL. A set-theoretic semantics for event subscription is introduced, based on which two metrics, recall and precision, are proposed to measure the accuracy of event subscriptions. We discuss the accuracy of several event subscription strategies under the framework of Web service event subscription standard proposals (WS-Eventing and WS-Notification). Four major types of event broker design patterns are discussed based on two visibility/reachability factors: if sink knows the source and if source can deliver events directly to the sink. The implication on the broker state and message routing is studied in this analysis. A prototype implementation indicated that these design patterns are feasible
28340796
Tests on Symmetry and Continuity between BSIM4 and BSIM5
This paper presents the test results on the CMOS model symmetry and continuity characteristics between BSIM4 and BSIM5 from University of California at Berkeley. It is shown that the industry standard model BSIM4 has a series of the shortcomings of the continuity and symmetry, such as the charge, high-order current derivatives, and the trans-capacitances while new generation BSIM MOSFET compact model, BSIM5, demonstrates all necessary continuity and symmetry characteristics, which are very important for analog and RF circuit design
13519541
WS-SLA: A Framework for Web Services Oriented Service Level Agreements
Service level agreements (SLA) becomes the prevailing business model for delivery of a large number of products and services in telecommunication and IT arenas. We presents an integrated service level agreement model applied to operating supporting system (OSS), on the basis of WfMC workflow reference model and service oriented architecture (SOA). And an application scenario instance of SLA system architecture is described by a set of operations models by Business Process Execution Language (BPEL)
41711298
Quantitative QoS Management Implement Mechanism in IP-DiffServ
In this paper, a quantitative QoS management implement mechanism in IP-DiffServ is presented. The approach has three merits: (1) it optimizes both the route selected for service class by traffic engineering in network layer and the service class selected for the user services by network plan in service layer, (2) it ensures quantitative QoS for the user service in DiffServ, (3) it achieves high resource utilization, and achieves better performance with less cost for the user service and selected route. Simulation has verified these merits.
46240388
An Efficient Heuristic Algorithm for Constructing Delay- and Degree-Bounded Application-Level Multicast Tree
In this paper we first investigate the problem of finding a delay- and degree-bounded maximum sum of nodes ALMT. We proved the problem is NP-hard, and testify its relationship with the well-studied degree-bounded minimum maximum-delay ALMT problem. We proposed a greedy algorithm FindOverlayTree with SRPF heuristic. The simulation results show that our design solution is a valid and cost-effective approach where compared to other three modified classic heuristics under several performance metrics.
1518844
Discovering panoramas in web videos
While methods for stitching panoramas have been successful given proper source images, providing these source images still remains a burden. In this paper, we present a method to discover panoramic source images within widely available web videos. The challenge comes from the fact that many of these videos are not recorded intentionally for stitching panoramas. Our method aims to find segments within a video that work as panorama sources. Specifically, we determine a video segment to be a valid panorama source according to the following three criteria. First, its camera motion should cover a wide field-of-view of the scene. Second, its frames should be "mosaicable", which states that the inter-frame motion should observe the underlying conditions for stitching a panorama. Third, its frames should have good image quality. Based on these criteria, we formulate discovering panoramas in a video as an optimization problem that aims to find an optimal set of video segments as panorama sources. After discovering these panorama sources, we synthesize regular scene panoramas using them. When significant dynamics is detected in the sources, we fuse the dynamics into the scene panoramas to make activity synopses to convey the dynamics. Our experiment of querying panoramas from YouTube confirms the feasibility of using web videos as panorama sources and demonstrates the effectiveness of our method.