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...st Aug 7th Sep 20th Figure 2: Bandwidth of Straw at the Golden Gate Bridge. It works over a 46-hop network. To sustain high bandwidth over a long path, pipelining is used avoiding interference. Tenet =-=[12]-=- satisfy many requirements. They provide reliable data collection over multi-hop network. However, Wisden can sample only up to 160Hz, and Tenet demonstrated only 50Hz sampling, which is far below the...

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...o place computation in a network efficient way. Other approaches allow programmers to express their programs as data flow-like “tasks” that may be spread across several different nodes in the network =-=[7, 8, 9, 4]-=-. P 2 shares the same motivation—hiding complexities of distribution communication and coordination in the sensor network domain—as these high level application toolkits. The P 2 architecture is diffe...

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...(SMAC [48], BMAC [36], XMAC [4]), power iaware storage, routing and data dissemination protocols [12, 15, 7], duty-cycling strategies [10, 8], adaptive sensing rate [28], tiered system architectures =-=[11, 21, 22]-=- and redundant placement of nodes [44, 23] to ensure coverage guarantees. While all the above techniques optimize and adapt energy usage to maximize the lifetime of a sensor node, the lifetime remains...

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...nts show that our estimator outperforms existing cross-layer approaches. We compare our estimator with MultihopLQI, the current state of the art estimator used by many sensornet protocols and systems =-=[18, 10, 16, 21, 2]-=-. On the Intel mirage testbed [8], our link estimator reduces packet delivery costs by 29% while maintaining a 99.9% delivery ratio in comparison to MultihopLQI’s 93%. On the USC Tutornet testbed, our...

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...ade tree paths. We can additionally add this mechanism with three more rules, which we have omitted here for brevity. Besides serving as data collection sinks, trees often serve as routing primitives =-=[11, 10, 13]-=-. Construction of multiple trees based on this program is very easy; a second tree only requires the addition of two facts for the new root such as dest(@AnyNode,root2) and shortestCost(@AnyNode,root2...

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...ance and adjustment to interference, cascading losses can occur, leading to inefficiency. We also wanted to compare Flush with Tenet’s reliable stream transport service with end-to-end retransmission =-=[9]-=-. However, since comparable performance numbers for Tenet is not available, we attempted to use and characterize Tenet’s performance on the Mirage testbed. Unfortunately, despite the assistance of Ten...

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... challenges from both classes, as we must deal with high-rate data and yet the system is required to operate for long periods. In general, although WSNs have been used for monitoring civil structures =-=[10,3,13,7,22,4]-=-, the combination of requirements we must address is unique. For instance, only a handful of the systems surveyed in [13] can be tasked remotely, and in these cases (e.g., [4]) the implementation lack...

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...ating Systems General Terms Design, Experimentation, Measurement, Performance Keywords Wireless sensor networks, Protocol stack 1 Introduction As sensor networks move towards increasing heterogeneity =-=[19]-=-, assumptions on how sensor network protocols operate are challenged. For instance, if an application is to run over multiple link layer technologies, applications and protocols cannot rely on the exi...

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...oblem and hidden to the end user. Related work is also in the context of other non-phone specific distributed systems. For example, in the context of sensor networks systems like Wishbone [12], Tenet =-=[13]-=-, VanGo [14], in the context of mobile ad hoc networks with SpatialViews [15], and in the context of cluster computing with Abacus [16]. All these systems are not applicable to our problem space for d...