Yuecheng Zhang

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This paper presents a distributed protocol for multi-hop robot positioning in underwater environment without relying on GPS data at each robot. It is a complementary approach for localization and coordination estimations in underwater scenarios where GPS services are unavailable, unstable, or unreliable. The protocol conducts the positioning task in three(More)
In this paper, we study the application oriented cross-layer protocol design and optimization. The goal of the study is to provide a feasible and flexible approach to solve the conflicts between the requirements of large scale, long life-time, and multi-purpose wireless sensor networks and the constraints of small bandwidth, low battery capacity, and(More)
In this paper we present a new routing protocol, flossiping, for wireless sensor networks. It can be regarded as an enhancement to existing flooding and gossiping approach by using a single branch gossiping with low-probability random selective relaying in order to achieve a better overall performance. By letting each sensor node decide its own activity in(More)
The increased availability of broadband connections has recently led to an increase in the use of Internet broadcasting (webcasting). Most webcasts are archived and accessed numerous times retrospectively. One challenge to skimming and browsing through such archives is the lack of text transcripts of the webcast's audio channel. This paper describes a(More)
This paper presents a pioneer work on using heterogeneous collaborative groupware to monitor wireless sensor networks. The prototype implementation illustrates that wireless sensor networks can be integrated into a larger scale, heterogeneous, collaborative groupware to enable complicated and/or geographically unbounded applications that require inputs from(More)
In this paper a Protocol for Location And Coordinates Estimation (PLACE) is presented as a distributed multihop positioning approach based on wireless sensor networks without relying on GPS data at each sensor node. It is suitable for military applications where GPS services are unavailable, instable, or unreliable. PLACE conducts the positioning task in(More)
As the use of Internet broadcasting (webcasting) increases, more webcasts will be archived and accessed numerous times retrospectively. One challenge in skimming and browsing through such archives is the lack of textual transcripts of the archived medias’ audio channel. Ideally, transcripts would be obtainable through Automatic Speech Recognition (ASR).(More)
Future wireless network are envisioned to be pervasive and ubiquitow. The integration of wireless sensor networks with wireless local area network and the Internet is an important issue of future wireless networks. This paper has identified three challenges in the integration of wireless sensor network with wireless local area networks and the Internet: (i)(More)
Pervasive computing, with its focus on users and their tasks rather than on computing devices and technology, provides an attractive vision for the future of computing. This paper, we create the new layered architecture for pervasive computing and discuss the responsibilities of each layer. Service discovery enables devices and services to properly(More)