Inter Processor Communication for Fault Diagnosis in Multiprocessor Systems

In the preseJlt paper a simple technique is proposed for fault diagnosis for multiprocessor and multiple system environments, wherein all microprocessors in the system are used in part to check the health of their neighbouring processors. It involves building simple fail-safe serial communication links between processors. Processors communicate with each other over these links and each processor is made to go through certain sequences of actions intended for diagnosis, under the observation of another processor .With limited overheads, fault detection can be done by this method. Also outlined are some of the popular techniques used for health check of processor-based systems

n-Logue: The Story of a Rural Service Provider In India

Can rural Information Communication Technology (ICT) be an effective tool to bridge the digital divide? How can the Internet help developing nations and their disadvantaged in particular? Those who lobby in favour of rural ICT believe that Internet is not just a means of communication but is also an enabler of livelihood in rural areas and therefore, power. For a very long time now, the developing world has carried the burden of colonization and slavery. This has resulted in a lack of confidence among developing economies and the belief that they are not at par with the rest of the world. The lack of "access" has curtailed their ability to compete. In fact, ingenuity and hard work hasn't been adequate for one to enjoy economic and social benefit. In order to acquire these benefits, access to resources like education, health and employment become critical. Internet has been a boon in this regard. Today, one can be in the remotest corner of the world and as long as there is access to Internet enjoy access to education, health and resources. This allows them to compete and use their ingenuity and hard work to bring about a significant difference to their lives. This paper concentrates on how ICT can affect the lives of rural people in the developing world. The total rural population of the developing world is about 3.5 billion, with their average per capita income being no more than $200 per year. India, with 700 million rural people located in 600,000 villages, is a reflection of the developing world. The key issue that is addressed in the paper is whether technology can bring about a difference in the lives of people who earn less than half a dollar a day. Can health and education be made available to them? Can they afford the Internet? And ultimately, can it significantly enhance their livelihoods and income

Next generation wireless for rural areas

165-167Following a spectacular growth of telecommunication in India, the country is focusing on the technology to provide broadband connections to its rural areas. Broadband wireless technologies are emerging to enable this to happen. Four such technological efforts are on the horizon. The paper looks at the four initiatives and what they could deliver to Indian rural areas in the next few years

Techniques for efficient implementation of symbolic substitution using one of may coding

Two techniques for implementing symbolic substitution (SS) using one-of-many coding are presented. Both techniques involve simultaneous recognition of multiple rules and hence reduce the complexity of SS implementation. Based on these new implementations, some factors that influence simultaneous recognition of rules are identified. It is shown using illustrations that the one-of-many coding is an optimal coding technique in terms of complexity of implementation

Proposed high speed packet switch for broadband integrated networks

The design of a high speed, broadband packet switch with two priority levels for application in integrated voice/data networks is presented. The packet switch can efficiently cope with 128 byte packets converging on it from eight 140 Mbit/s dynamic time division multiplexed fibre optic links. The packet switch throughput varies with the load and traffic composition, and the delay experienced by voice and data packets is within 300 μs and 3 ms, respectively. The design is implemented by task-sharing in a multi-processor configuration. The design of the packet switch, including its subsystems, is detailed here

Routing wavelength and time-slot reassignment algorithms for TDM based optical WDM networks

In this paper, we consider the problem of maximizing the time of first lightpath request rejection, T in the circuit-switched time division multiplexed (TDM) wavelength-routed (WR) optical WDM networks. TDM is incorporated into WDM, to increase the channel utilization when the carried traffic does not require the entire channel bandwidth. In TDM-WDM network, multiple sessions are multiplexed on each wavelength by assigning a sub-set of the TDM slots to each session. Thus, given a session request with a specified bandwidth, a lightpath has to be established by using the routing, wavelength and time-slot assignment (RWTA) algorithms. If the lightpath cannot be established, lightpath request rejection or call blocking occurs. As each lightpath is substantial revenue and long-lived, lightpath request rejection is highly unfavourable in the optical backbone networks. In this paper, we are proposing an intelligent routing, wavelength and time-slot reassignment algorithm for multi-rate traffic demands, where, when a call gets blocked, the already established calls in the network are rerouted, wavelength and time-slot reassigned so as to accommodate the blocked call. Since we are talking of slow arrivals and long holding times for the lightpaths, it is possible to do this reassignment while provisioning a new call. Simulation based analyses are used to study the performance of the proposed reassignment algorithm. The results show that the proposed reassignment algorithm can be used to maximize the time of first call blocking, thereby accommodating more calls in the network before upgrading the network capacity