Mobile and Vehicular Ad-hoc Networks (MANETs and VANETs) represent critical types of ad-hoc networks with diverse applications. Establishing a resilient wireless network for mobile devices in areas lacking traditional infrastructure, such as 5G base stations, presents significant potential for research fields like tactical military networks or commercial vehicular networks. In this study, leveraging the capabilities of the Common Open Research Emulator (CORE) and the Extendable Mobile Ad-hoc Network Emulator (EMANE), we present the development and evaluation of an emulated 5G sidelink (SL) network model. By customizing EMANE’s IEEE 802.11 model to adjust modulation and coding schemes based on signal quality and Packet Completion Rate (PCR) curves derived from link-level simulations, we have created a representative model of the 5G SL physical layer. Furthermore, our comparative analysis of routing protocols, specifically Optimized Link State Routing (OLSR) and Open Shortest Path First with MANET Designated Router (OSPF-MDR), underscores the critical role of protocol selection in diverse network environments. While OSPF-MDR exhibits advantages in stable networks, OLSR demonstrates greater efficiency in mode dynamic mobile scenarios. These insights not only contribute to optimizing vehicular network efficiency but also inform future advancements across various research domains.

Two key challenges in the design of datalinks for unmanned aircraft (UAS) systems compared to other wireless links are the long range of distances and speeds that need to be covered. The 960 - 1164 MHz part of the IEEE L band has been identified as a candidate spectrum for future manned and unmanned aircraft datalinks. The amount of spectrum available in the L-Band is not sufficient to support video applications common in UASs and so dual-band designs using both L-Band and C-Band are being considered. For L-Band, two projects funded by EUROCONTROL L-Band Digital Aeronautical Communications Systems 1 and 2 (L-DACS1 and L-DACS2) are often mentioned for use in UAS also. We briefly discuss issues with their use for UAS. We compare the two proposals in terms of their scalability, spectral efficiency, and interference resistance. Then we discuss several issues in UAS datalink design including availability, networking, preemption, and chaining. We also propose ways to mitigate interference with other systems in the L-Band.

Emerging distributed multimedia applications have stringent performance requirements in terms of bandwidth, delay, delay-jitter, and loss rate. The Tenet real-time protocol suite provides the services and mechanisms for delivering such performance guarantees, even during periods of high network load and congestion. The protocols achieve this by using resource management, connection admission control, and appropriate packet service disciplines inside the network. The Sequoia 2000 network employs the Tenet Protocol Suite at each of its hosts and routers making it one of the first wide area packet-switched networks to provide end-to-end per-connection performance guarantees. This paper presents experiments with the Tenet protocols on the Sequoia 2000 network including measurements of the performance of the protocols, the service recieved by real multimedia applications using the protocols, and comparisons with the service received by applications that use the Internet protocols (UDP/IP). We conclude that the Tenet protocols successfully protect the real-time channels from other traffic in the network, including other real-time channels, and allow channels to continue to meet their performance guarantees, even when the network is highly loaded.

article Free Access Share on A note on Hennessy's “symbolic debugging of optimized code” Authors: David Wall Computer Science Department, Whitmore Laboratory, The Pennsylvania State University, University Park, PA Computer Science Department, Whitmore Laboratory, The Pennsylvania State University, University Park, PAView Profile , Amitabh Srivastava Computer Science Department, Whitmore Laboratory, The Pennsylvania State University, University Park, PA Computer Science Department, Whitmore Laboratory, The Pennsylvania State University, University Park, PAView Profile , Fred Templin Computer Science Department, Whitmore Laboratory, The Pennsylvania State University, University Park, PA Computer Science Department, Whitmore Laboratory, The Pennsylvania State University, University Park, PAView Profile Authors Info & Claims ACM Transactions on Programming Languages and SystemsVolume 7Issue 1pp 176–181https://doi.org/10.1145/2363.215005Published:02 January 1985Publication History 14citation167DownloadsMetricsTotal Citations14Total Downloads167Last 12 Months14Last 6 weeks2 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF