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.

Mobile station capable of and a method for generating chip patterns for transmission

Abstract: A base station configured to communicate with a mobile station includes a controlling-information transmitting unit and a receiving unit. The controlling-information transmitting unit is configured to transmit to the mobile station as a set of controlling information, an information set indicating an environment of a cell which is resided by the mobile station, or an information set indicating power of interference from surrounding cells, or an information set indicating a condition of propagation channel. The receiving unit is configured to receive a signal transmitted from the mobile station, based on said set of controlling information, via a variably-controlling process of a spreading factor and a number of chip repetitions.

Whisper: a wristwatch style wearable handset

Abstract: Whisper is a new wrist-worn handset, which is used by inserting the fingertip into the ear canal. A received signal is conveyed from a wrist-mounted actuator to the ear canal via the hand and a finger by bone conduction. The users voice is captured by a microphone mounted on the inside of the wrist. All components of Whisper can be mounted on the wrist, and usability does not de- crease if the size of components is miniaturized. So, both wearability and usability can be achieved together. The way Whisper is operated is similar to that of an ordinary telephone handset. Thus, onlookers may not look upon Whispers operation as talking to oneself, even if the associated PDA is controlled by voice commands. Whis- per is especially effective in a noisy environment. Signals received via bone conduction can be heard clearly in the presence of noise without raising the volume (-12 dB at noise = 90 dB(A) in comparison to cellular phone hand- set). Whisper is also effective in avoiding the annoying problem of the users voice being raised in a noisy situa- tion. Feedback of the users utterance is boosted by bone conduction when covering the ear canal with a fingertip, then the users voice does not need to raised in the pres- ence of noise (-6 dB at noise = 90 dB(A) in comparison to cellular phone handset). Whisper is useful as a voice interface for a wrist-worn PDA and cellular phone.

A Service-Based Universal Application Interface for Ad Hoc Wireless Sensor and Actuator Networks

Abstract: A set of services and interface primitives to be offered to an application programmer of an ad hoc wireless sensor and actuator network (AWSAN) is described. As the definition of sockets has made the use of communication services in the Internet independent of the underlying protocol stack, communication medium and even operating system, the proposed application interface, called the “sensor network services platform” (SNSP), identifies an abstraction that is offered to any sensor network application and supported by any sensor network platform. The SNSP builds on the query/command paradigm already used in several sensor network implementations and further adds time synchronization, location and naming services that support the communication and coordination among application components.

The role of ontologies in emergent middleware: supporting interoperability in complex distributed systems

Abstract: Interoperability is a fundamental problem in distributed systems, and an increasingly difficult problem given the level of heterogeneity and dynamism exhibited by contemporary systems. While progress has been made, we argue that complexity is now at a level such that existing approaches are inadequate and that a major re-think is required to identify principles and associated techniques to achieve this central property of distributed systems. In this paper, we postulate that emergent middleware is the right way forward; emergent middleware is a dynamically generated distributed system infrastructure for the current operating environment and context. In particular, we focus on the key role of ontologies in supporting this process and in providing underlying meaning and associated reasoning capabilities to allow the right run-time choices to be made. The paper presents the Connect middleware architecture as an example of emergent middleware and highlights the role of ontologies as a cross-cutting concern throughout this architecture. Two experiments are described as initial evidence of the potential role of ontologies in middleware. Important remaining challenges are also documented.

Mobile terminal, audience information collection system, and audience information collection method

Abstract: In order to more precisely grasp actual audience situations of a user through accumulation of broadcast reception qualities in combination with audience information in a mobile terminal, this mobile terminal 2 has a wave receiver 21 for receiving a broadcast wave, a signal reproducer 22 for acquiring a broadcast signal by demodulating the broadcast wave received by the wave receiver 21, and thereafter reproducing the broadcast signal, a level measuring part 24 for measuring a reception level of the broadcast wave received by the wave receiver 21 , an information generator 28 for generating audience information containing an audience time being a time of reproduction by the signal reproducer 22 , and the reception level at the audience time measured by the level measuring part 24 , and an information transmitter 30 for transmitting the audience information generated by the information generator 28.