In this paper we study through simulations the impact of PHY/MAC protocols on higher layers. In a comparative way, we investigate the effectiveness of some protocols when they coexist on a wireless mesh network environment. Results show that PHY/MAC parameters have an important impact on routing performances. Based on these results, we propose two traffic-aware routing metrics based on link ava...

ETX (Expected Transmission Count) is a well-known link quality metric which has been widely used to improve the performance of ad-hoc routing protocols. However, ETX shows poor performance under high traffic load. To address this problem, this paper proposes a new link quality estimation metric called HETX (High load Expected Transmission Count) that takes into account the effects of routing co...

This document describes a common practice on how the existing metric of Interior Gateway Protocols (IGP) can be used as an alternative metric to the Traffic Engineering (TE) metric for Constraint Based Routing of MultiProtocol Label Switching (MPLS) Traffic Engineering tunnels. This effectively results in the ability to perform Constraint Based Routing with optimization of one metric (e.g., lin...

A public transport operator’s ability to understand and improve service reliability experienced by passengers depends upon their ability to measure it. Traditionally, largely due to data collection limitations, passengers’ experience of reliability has not been measured directly. As a result, operators often fail to effectively measure, and thus manage, key issue affecting passengers’ perceived...

Predictable wireless communication is required for closedloop sensing and control in many networked cyber-physical systems, yet co-channel interference remains a major source of uncertainty in wireless communication. Integrating the protocol model’s locality and the physical model’s high fidelity, the physical-ratio-K (PRK) interference model is expected to serve as a foundation for distributed...

Despite being a core networking primitive, collection protocols today often suffer from poor reliability (e.g., 70%) in practice, and heavily used protocols have never been evaluated in terms of communication efficiency. Using detailed experimental studies, we describe three challenges that cause existing collection protocols to have poor reliability and waste energy: inaccuracies in link estim...

Despite being a core networking primitive, collection protocols today often suffer from poor reliability (e.g., 70%) in practice, and heavily used protocols have never been evaluated in terms of communication efficiency. Using detailed experimental studies, we describe three challenges that cause existing collection protocols to have poor reliability and waste energy: inaccuracies in link estim...

Solar power forecasting improvements are mainly 1 evaluated by statistical and economic metrics, and the practi2 cal reliability benefits of these forecasting enhancements have 3 not yet been well quantified. This paper aims to quantify relia4 bility benefits from solar power forecasting improvements. To 5 systematically analyze the relationship between solar power 6 forecasting improvements an...

While shortest paths in WordNet are known to correlate well with semantic similarity, an is-a hierarchy is less suited for estimating semantic relatedness. We demonstrate this by comparing two free scale networks ( ConceptNet and Wikipedia) to WordNet. Using the Finkelstein353 dataset we show that a shortest path metric run on Wikipedia attains a better correlation than WordNet-based metrics. C...

(ABSTRACT) Broadband wireless access (BWA) is a promising emerging technology. In the past, most BWA systems were based on proprietary implementations. The Institute of Electrical and Electronics Engineers (IEEE) 802.16 task group recently standardized the physical (PHY) and medium-access control (MAC) layers for BWA systems. To operate in a wide range of physical channel conditions, the standa...