Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | ACM Digital Library |
|---|---|
| Author | Chen, Cheng-Wei Wei, Pu-Chen Chen, Chung-Hsin Lee, Jenq-Kuen |
| Abstract | In this paper, we investigate the issues to support Java RMI over Bluetooth environments. Our supports include several technical items. First, we develop a set of protocol stack layers written in Java for Bluetooth support, called JavaBT. In JavaBT, the HCI layer provides a uniform interface of accessing the Bluetooth hardware capabilities. The L2CAP provides connection-oriented and connection-less data services to upper layer protocols with protocol multiplexing capability, segmentation and reassembly operation, and group abstractions. These two layers of protocol driver can help programmers to write Bluetooth applications in the Java programming language. Next, we provide supports in L2CAP layer with socket for RMI socket. This enables the support of Java RMI over Bluetooth environments with efficiency.In addition, we model the cost for the access patterns of Java RMI communications. The cost model is used to guide the formation and optimizations of the scatternets of Bluetooth environments associated Java RMI environments. In our approach, we first perform a method for initial configurations for the number of piconets. This is based on well-known BTCP [2] algorithm. However, this does not take the access patterns of RMI communications into considerations. In our method, we provide a cost model for access patterns of RMI communications. With the support of runtime profiling in Java, we can then dynamically re-configure the scatternets to optimize the Java RMI performance over scatternets. This is particularly useful for systems with periodical behaviors or system behaviors with similarity related to historical or profiling data. With the cost model for access patterns of RMI communications, we then perform a two step algorithm. In the first stage, we employ a recursive spectral bisection method and KL-refinement procedure to cluster nodes making the frequent transmissions. After this stage, a post-configuring method is used to determine the role of nodes and form the scatternet topology.In the experiment, we evaluate the robustness of our implementation of RMI software over Bluetooth environments. We perform experiments of numerous benchmarks from RMI Benchmark Suite [1], DHPC Java Benchmarks, and the Java Grande Forum MPJ Benchmarks. In our testbed, the EBDKs (Ericsson Bluetooth Develop Kit) are connected to two computers by the COM port. We test the performance on one node and two nodes, respectively. The one node version is a sequential version and the two node version is a parallel version with RMI over Bluetooth.Despite limited COM port performance, we still observe performance gains on Hamming, EP, Series, RayTracer, and SelSort. The performance is shown in Figure 1. Note that due to the server and client are different machines, the optimal speedup for this case is around 1.7 times. With better connections between host and Bluetooth devices, we expect the performance to be improved. With the data rate in the peak to be 723k bps, it's still much slower than fast Ethernet. Therefore, the type of numerical applications run well with RMI over Bluetooth can also be observed from our experimental results. Note that our support with RMI over Bluetooth also gives more high-level control with Bluetooth environments. System loads in the OS level can also be distributed to remote site servers with RMIs. |
| Starting Page | 237 |
| Ending Page | 237 |
| Page Count | 1 |
| File Format | |
| ISBN | 1581135998 |
| DOI | 10.1145/583810.583849 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2002-11-03 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Graph partitioning Bluetooth Wireless computing High-performance computing Java rmi |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|