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We design and implement an information announcement basic software toolkit that realizes a new using style in mobile computing. This style regards a mobile computer as a server as well as a client. The proposed toolkit has two features. One is that the toolkit can solve problems such as disconnections and narrow network bandwidth. The other is that the toolkit allows a wide variety of legacy network...
A critical problem with location fingerprinting is the considerable time and effort spent measuring received signal strengths at all location candidates to create the survey database. To reduce this cost, existing methods use a signal path loss model to interpolate part of the survey database from data actually measured at location candidates. However, the positioning accuracy can become degraded,...
We have developed an adhoc wireless positioning network (AWPN) scheme for information-oriented construction that can temporarily and easily provide a positioning area in both indoor and outdoor environments. The particular requirements of AWPNs are easy deployment and easy configuration because the network should be removed on completion of construction and must frequently accompany the active construction...
Laptop computers and cellular phones often have the capability for short-range wireless communication such as adhoc mode in wireless LAN and Bluetooth. However, the use of the capability is limited due to the lack of consideration for shortrange communications in conventional communication protocols; i.e., an unnatural and troublesome procedure is required to specify targets especially within a nearby...
A spread of short-range and infrastructure-less wireless communication devices increases opportunities for temporarily exchanging information in a face-to-face style, called wireless face-to-face communication. In such wireless communication, a critical issue with secure information exchange is encryption key sharing without the aid of any centralized administration. In this paper, we propose a novel...
In this paper, we propose three heuristics for high-efficiency selections of MPRs (multipoint relays) in link state QoS routing protocol: MIMS (maximizing integration metric selection), MQES (maximizing QoS-efficiency selection), and MCIS (minimizing cost-inefficiency selection). The basic approach of these selections is to determine a smaller set of MPRs that provide better QoS paths between any...
In this paper, we propose name resolution middleware that involves positional awareness to identify target hosts in wireless visible area communication (WVAC). WVAC is a wireless communication network that enables users to exchange information with nearby hosts, especially within the users' visible area, wherein the underlying network can be locally and temporarily constructed without the aid of any...
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