| 1. |
- Chen, Lin, et al.
(författare)
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Oblivious Neighbor Discovery for Wireless Devices with Directional Antennas
- 2016
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Ingår i: IEEE INFOCOM 2016. - Piscataway, NJ : IEEE Communications Society. - 9781467399531
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Konferensbidrag (refereegranskat)abstract
- Neighbor discovery, the process of discovering all neighbors in a device's communication range, is one of the bootstrapping networking primitives of paramount importance and is particularly challenging when devices have directional antennas instead of omni-directional ones. In this paper, we study the following fundamental problem which we term as oblivious neighbor discovery: How can neighbor nodes with heterogeneous antenna configurations and without clock synchronization discover each other within a bounded delay in a fully decentralised manner without any prior coordination? We first establish a theoretical framework on oblivious neighbor discovery and establish the performance bound of any neighbor discovery protocol achieving oblivious discovery. Guided by the theoretical results, we then design an oblivious neighbor discovery protocol and prove that it achieves guaranteed oblivious discovery with order-minimal worst-case discovery delay in the asynchronous and heterogeneous environment. We further demonstrate how our protocol can be configured to achieve a desired trade-off between average and worst-case performance
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| 2. |
- Chiesa, Marco, 1987-, et al.
(författare)
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The quest for resilient (static) forwarding tables
- 2016
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Ingår i: INFOCOM 2016 - The 35th Annual IEEE International Conference on Computer Communications, IEEE. - : Institute of Electrical and Electronics Engineers (IEEE). - 9781467399531
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Konferensbidrag (refereegranskat)abstract
- Fast Reroute (FRR) and other forms of immediate failover have long been used to recover from certain classes of failures without invoking the network control plane. While the set of such techniques is growing, the level of resiliency to failures that this approach can provide is not adequately understood. We embark upon a systematic algorithmic study of the resiliency of immediate failover in a variety of models (with/without packet marking/duplication, etc.). We leverage our findings to devise new schemes for immediate failover and show, both theoretically and experimentally, that these outperform existing approaches.
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| 3. |
- Jeong, Jaeseong, et al.
(författare)
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Cluster-aided mobility predictions
- 2016
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Ingår i: Proceedings - IEEE INFOCOM. - : IEEE conference proceedings. - 9781467399531
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Konferensbidrag (refereegranskat)abstract
- Predicting the future location of users in wireless networks has numerous applications, and can help service providers to improve the quality of service perceived by their clients. The location predictors proposed so far estimate the next location of a specific user by inspecting the past individual trajectories of this user. As a consequence, when the training data collected for a given user is limited, the resulting prediction is inaccurate. In this paper, we develop cluster-aided predictors that exploit past trajectories collected from all users to predict the next location of a given user. These predictors rely on clustering techniques and extract from the training data similarities among the mobility patterns of the various users to improve the prediction accuracy. Specifically, we present CAMP (Cluster-Aided Mobility Predictor), a cluster-aided predictor whose design is based on recent non-parametric Bayesian statistical tools. CAMP is robust and adaptive in the sense that it exploits similarities in users' mobility only if such similarities are really present in the training data. We analytically prove the consistency of the predictions provided by CAMP, and investigate its performance using two large-scale datasets. CAMP significantly outperforms existing predictors, and in particular those that only exploit individual past trajectories.
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| 4. |
- Van, Dung pham, et al.
(författare)
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Fiber optic vs. wireless sensors in energy-efficient integrated FiWi smart grid networks : An energy-delay and TCO comparison
- 2016
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Ingår i: Proceedings - IEEE INFOCOM. - : IEEE. - 9781467399531
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Konferensbidrag (refereegranskat)abstract
- This paper aims at designing an ecoconscious future-proof sensor enhanced fiber-wireless (SFiWi) network based on EPON, WLAN, wireless sensor (WS), and fiber optic sensor (FOS) technologies as a shared communications infrastructure for broadband access and smart grids. A total cost of ownership (TCO) model is developed to help utilities decide whether to deploy WSs or FOSs in different scenarios and estimate sensor-related costs. To prolong battery life of wireless devices and maximize the overall energy efficiency, a novel energy conservation scheme for SFiWi networks (ECO-SFiWi) is proposed. ECO-SFiWi designs the whole network in three TDMA layers to enhance network performance, while scheduling network components to sleep outside their transmission slots. A comprehensive energy saving model accounting for both optical backhaul and wireless front-end components and a delay analysis based on M/G/1 queuing are presented. Results reveal that with their extremely long lifetime and ability to sustain in harsh environments, FOSs are superior to WSs when advanced interrogation techniques are deployed to reduce their total cost. ECO-SFiWi achieves more than 89% of energy savings, while maintaining low delay for both broadband and smart grid traffic in typical scenarios. FPGA hardware emulation and analytical results match well verifying the effectiveness of ECO-SFiWi.
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