Institution
NTT DoCoMo
About: NTT DoCoMo is a based out in . It is known for research contribution in the topics: Base station & Mobile station. The organization has 4032 authors who have published 8655 publications receiving 160533 citations.
Topics: Base station, Mobile station, Transmission (telecommunications), Signal, Terminal (electronics)
Papers published on a yearly basis
Papers
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28 Aug 2003TL;DR: In this article, the authors proposed a public-key based cryptosystem comprising an authorizer, where the authorizer can be a single entity or a hierarchical or distributed entity.
Abstract: The present invention provides methods for sending a digital message from a sender (606) to a recipient (608) in a public-key based cryptosystem comprising an authorizer (606). The authorizer can be a single entity (606) or comprise a hierarchical or distributed entity (602, 604a-604b). The present invention allows communication of messages by an efficient protocol, not involving key status queries or key escrow, where a message recipient (608) can decrypt a message from a message sender (606) only if the recipient (608) possesses up-to-date authority from the authorizer. The invention allows such communication in a system comprising a large number (e.g. millions) of users.
72 citations
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13 Sep 2010TL;DR: The underlying problem is defined, the design space of possible solutions are outlined, and relevant existing approaches are surveyed by classifying them according to their design space.
Abstract: We are observing an increasing trend of connecting embedded sensors and sensor networks to the Internet and publishing their output on the Web. We believe that this development is a precursor of a Web of Things, which gives real-world objects and places a Web presence that not only contains a static description of these entities, but also their real-time state. Just as document searches have become one of the most popular services on the Web, we argue that the search for real-world entities (i.e., people, places, and things) will become equally important. However, in contrast to the mostly static documents on the current Web, the state of real-world entities as captured by sensors is highly dynamic. Thus, searching for real-world entities with a certain state is a challenging problem. In this paper, we define the underlying problem, outline the design space of possible solutions, and survey relevant existing approaches by classifying them according to their design space. We also present a case study of a real-world search engine called Dyser designed by the authors.
72 citations
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15 Nov 2004TL;DR: It is shown step-by-step how a prototypical implementation can be realized based on current semantic technologies around UDDI, WSDL, and SOAP and revealed pitfalls in the current version of OWL-S that severely limit its support for mechanizing service discovery, configuration, combination and automated execution.
Abstract: OWL-S is a combined effort of the Semantic Web and the Web Service community to facilitate an intelligent service provisioning on the Semantic Web. The vision of OWL-S includes automatic service discovery, invocation, composition, orchestration and monitoring of Web-Services through their semantic descriptions. In this paper, we investigate the practical applicability of the current OWL-S specification and show that, in spite of the large momentum of OWL-S, significantly more work needs to be done before the vision of truly intelligent Semantic Web Services can become true. We therefore study the case of an autonomous travel agent that helps users with online hotel arrangements. The aim of our work is twofold: on the one side, we show step-by-step how a prototypical implementation can be realized based on current semantic technologies around UDDI, WSDL, and SOAP. On the other hand, we reveal pitfalls in the current version of OWL-S that severely limit its support for mechanizing service discovery, configuration, combination and automated execution. Throughout the paper, we present practical solutions and workarounds to existing OWL-S shortcomings and hope to therewith further stimulate the ongoing work on Semantic Web Services.
72 citations
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21 Aug 2003TL;DR: In this article, a virtual channel request handler can transmit a request request, requesting an allocation of transmission resources for the virtual channel, based on the request, and the channel confirmation can be generated by the destination node and can be returned to the source node.
Abstract: A wireless network with distributed medium access control allows establishing of a virtual channel between a source node and a destination node via at least one intermediate node. The virtual channel may be established for the entire duration of a communication between the source node and the destination node, and, to establish the virtual channel, a request handler can transmit a virtual channel request, requesting an allocation of transmission resources for the virtual channel. Based on the virtual channel request, a virtual channel confirmation can be generated by the destination node and can be returned to the source node, indicating an allocation of the resources for the virtual channel. A communication handler can then transmit data from the source node to the destination node using the available transmission resources.
72 citations
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31 Mar 2003TL;DR: In this paper, a mobile application environment that form part of at least one access network is provided, which comprises a mervlet application, including a set of instructions to create a dynamic web page.
Abstract: In one aspect of the invention, a mobile application environment that form part of at least one access network is provided. The environment comprises a mervlet application, including a set of instructions to create a dynamic web page. The mervlet is capable of executing on a local node or a server node, each of which is coupled with the access network, for displaying the dynamic web page on the local node in response to a request from a client application executing on the local node. The environment also comprises at least one application attribute associated with the mervlet. The application attribute includes at least one performance attribute for characterizing user perceived performance of the mervlet. The environment further comprises a mervlet engine associated with the mervlet. The engine includes a policy module having a first set of instructions operative to provision execution of the mervlet between the local and server nodes based on the application attribute.
72 citations
Authors
Showing all 4032 results
Name | H-index | Papers | Citations |
---|---|---|---|
Amit P. Sheth | 101 | 753 | 42655 |
Harald Haas | 85 | 750 | 34927 |
Giuseppe Caire | 82 | 825 | 40344 |
Craig Gentry | 75 | 222 | 39327 |
Raj Jain | 64 | 424 | 30018 |
Karl Aberer | 63 | 554 | 17392 |
Fumiyuki Adachi | 54 | 1010 | 15344 |
Ismail Guvenc | 52 | 451 | 13893 |
Frank Piessens | 52 | 391 | 10381 |
Wolfgang Kellerer | 49 | 502 | 9383 |
Yoshihisa Kishiyama | 48 | 379 | 11831 |
Ravi Jain | 48 | 160 | 7467 |
Josef A. Nossek | 48 | 623 | 10377 |
Tadao Nagatsuma | 47 | 430 | 11117 |
Christian Bettstetter | 46 | 204 | 11051 |