2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE最新文献

{"title":"Using Kalman innovations for transmission control of location updates in a wireless network","authors":"Gregory L. Barnette","doi":"10.1109/MILCOM.2010.5680101","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680101","url":null,"abstract":"Distributed systems, such as cooperative unmanned aerial vehicles (UAVs) or unmanned ground vehicles (UGVs), typically depend on wireless communication networks to implement system control. The reliance on wireless communications within a networked control system (NCS) subjects their performance not only to system dynamic characteristics and feedback laws, but also the performance characteristics of the communications links. Fluctuations in communication system performance are reflected by corresponding changes in the control system performance. For instance, network protocols incorporate strategies that manage or limit the message traffic within the network to maintain stable operation of the network. However, these protocols are typically designed using the layered architecture approach, in which the network protocols are designed independently of the applications. In this paper, we present some initial steps toward designing cross-layer protocols to support networked control applications in wireless networks. We consider one portion of networked control in which the feedback of sensing information from a set of distributed agents is made to a control center over the network. We consider a multiple-access scenario in which the location updates must share the network resources with external traffic sources. When the network traffic is heavy, sending every location update over the network can result in increased congestion and decreased performance for both the control and regular network traffic. We propose schemes that use the innovations of a Kalman filter-based tracking system to limit which location updates are scheduled for transmission and thus improve the system performance.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124936984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cognitive topology control based on game theory","authors":"E. van den Berg, M. Fecko, S. Samtani, C. Lacatus, Mitesh P. Patel","doi":"10.1109/MILCOM.2010.5679565","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5679565","url":null,"abstract":"We have created a framework to design and study distributed topology control algorithms that combine network-formation games with machine learning. The algorithms rely on game players to pursue selfish actions through low-complexity greedy algorithms with low or no signaling overhead. Convergence and stability are ensured through proper mechanism design that eliminates infinite adaptation process. The framework also includes game-theoretic extensions to influence behavior such as fragment merging and preferring links to weakly connected neighbors. Learning allows adaptations that prevent node starvation, reduce link flapping, and minimize routing disruptions by incorporating network layer feedback in cost/utility tradeoffs. Using greedy utility maximization as a benchmark in Telcordia WISER emulator, we show improvements of for metrics such as the numbers of disconnected fragments (14%) and weakly connected nodes (35%), topology stability (41%), and disruption to user flows (16%). The proposed framework is particularly suitable to cognitive radio networks because it can be extended to handle heterogeneous users with different utility functions and conflicting objectives.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121487049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Power efficiency of decode-and-forward cooperative relaying","authors":"Zhengguo Sheng, Bong Jun Kc, A. Swami, Kang-Won Lee, K. Leung","doi":"10.1109/MILCOM.2010.5680427","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680427","url":null,"abstract":"We investigate fundamental characteristics of cooperative transmission in terms of power efficiency. By introducing the concept of “cooperative region”, we evaluate the average power efficiency which is defined as the ratio of total consumed transmit power with cooperation to that of direct transmission and show how the average performance depends upon the QoS requirement, distance between source and destination and on node density. Further, we propose a dynamic cooperation scheme that combines both cooperative and direct transmission. Analytical results are supplemented by simulation results to demonstrate the energy saving of cooperation transmission.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114265212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Joint detection and channel estimation for block transmission schemes","authors":"Fábio Coelho, R. Dinis, P. Montezuma","doi":"10.1109/MILCOM.2010.5680240","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680240","url":null,"abstract":"SC-FDE (Single-Carrier with Frequency-Domain Equalization) block transmission technique can have excellent performance in severely time-dispersive channels provided that accurate channel estimates are available at the receiver. In this paper we consider joint detection and channel estimation for SC-FDE schemes where a coarse channel estimate is obtained with the help of a training sequence and we employ iterative receivers where for each iteration the data estimates are used to improve the channel estimates. However, since the frequency-domain data blocks can have large envelope fluctuations, a decision-directed channel estimation might have significant noise enhancement effects. To overcome this problem, we combine channel estimates based on the training sequence with decision-directed channel estimates. Our performance results show that these techniques allow good performances without requiring high-power pilots or training blocks.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122800556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced intermediate packet delivery in delay tolerant networks","authors":"A. Talari, N. Rahnavard","doi":"10.1109/MILCOM.2010.5680440","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680440","url":null,"abstract":"Recently, rateless codes have been employed in packet forwarding protocols of delay tolerant networks (DTNs) to improve the network reliability and to cope with packet loss. However, in intermediate range, where the number of received coded packets is less than the number of source packets, rateless decoder cannot recover any source packets. However, in some applications such as multimedia content delivery partial recovery of source packets from the incomplete received encoded packets is still desired. In this paper, we propose to deliver rateless coded symbols in a certain order to improve the intermediate packet recovery rate. We propose sorted packet forwarding (SPF) and improved SPF (ISPF) that aim to sort coded symbols at source and destination, respectively. Next, we propose modified SPF (MSPF) and modified ISPF (MISPF), which employ a new class of rateless codes to achieve even higher recovery rates compared to SPF and ISPF. Finally, we evaluate the proposed algorithms' performance using numerical simulations, and discuss the pros and cons of each algorithm.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131440072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intelligent application persistence in tactical wireless networks","authors":"Ta Chen, V. Kaul, F. Sultan, K. Parmeswaran, S. Samtani, D. Shur, T. Kiernan, S. Thomas, W. Zimmerman","doi":"10.1109/MILCOM.2010.5680419","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680419","url":null,"abstract":"Mobile tactical MANETs are subject to periods of intermittent connectivity and transient events of significant packet loss. Because of such disruptions, protocols and technologies have been proposed that are disruption and delay tolerant. One class of such systems works by storing messages/packets in the network. If connectivity to neighbors is lost, missing messages may be delivered when connectivity to neighbors is restored. This delay tolerant networking (DTN) technology aims to reliably deliver all the data that a source directs towards a receiver node. We suggest that in some cases it is of little utility and may even be counter-productive to persist and deliver all packets lost during a disruption episode. For example, in situational awareness applications, retransmitting many seconds or minutes of lost GPS tracks is not appropriate. Instead a snapshot of the current position of all tracked entities is preferable. Similarly in a multimedia stream or VOIP call, just the key missing information should be replayed. Not only does full retransmission of all missing packets introduce delays during retransmission, but also the bandwidth consumed during retransmission is wasted. Note that each application may have different semantics. Therefore determining what data is appropriate to deliver for a given application in order to recover from a temporary disconnection requires knowledge of the application semantics. In previous work, we proposed Heterogeneous Intelligent Filtering (HIF), a technology that intelligently filters and transforms data to match network capacity and end-user capability. In HIF, extraneous information not needed by the end-user is filtered by HIF agents. In this work2, we show how the HIF concept can be extended to the data and information persisted during disruptions. The information stored for later retransmission to previously disconnected receivers may consist of application state snapshots, summaries or transcripts of the missing data, or just those portions of a media stream judged to be relevant to the user at a given point in time. We describe our work on application aware persistence for real-time multimedia and tactical situational awareness applications. The middleware infrastructure of the HIF systems reported on in previous work is extended to support application aware persistence. We analyze the performance benefit of application persistence on a tactical situational awareness scenario. Application persistence is particularly useful when the end-device may be limited in its processing power and ability to render data, since it reduces the demands on the client application. Accordingly, we also illustrate the usefulness of our application aware persistence middleware in supporting multimedia and situational awareness applications implemented on handheld Android devices.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131519159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mobile User Objective System (MUOS) to legacy UHF Gateway Component(MLGC): Paper Number: 1569291747","authors":"O. Medina, Julie Bryant, J. Criddle, M. Cross, B. Simpkins, C. Pitts, S. Hryckiewicz","doi":"10.1109/MILCOM.2010.5680271","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680271","url":null,"abstract":"The Mobile User Objective System (MUOS) is the next generation Department of Defense (DoD) Ultra High Frequency (UHF) satellite communications (SATCOM) system that will provide the Warfighter with modern worldwide mobile communication services. To sustain the current UHF SATCOM constellation capabilities, the MUOS satellites will also offer a legacy UHF communications payload that will provide capabilities to existing deployed UHF terminals, utilizing dedicated and time division multiple access (TDMA) waveforms such as Integrated Waveform (IW) and Demand Assigned Multiple Access (DAMA). The MUOS satellite will be very flexible in that it will support new network-centric and legacy users; however, the two payloads will not be interconnected. As such, there is no translation between the legacy and new network-centric waveforms. With the expected life of the satellite being at 2024 and with the large number of existing legacy terminals, a legacy UHF to MUOS translation capability was deemed necessary by Assistant Secretary of Defense (ASD) for Network and Information Integration (NII). The MUOS to Legacy UHF Gateway Component (MLGC) will be developed within the Emerging Technologies Program Management Office (PMO) within the Defense Information Systems Agency (DISA). This paper describes the recommended solution under consideration for this initiative.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127751390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A protocol for adaptive multicast transmission in packet radio networks","authors":"W. Steven, D. E. Jason, B. P. Michael","doi":"10.1109/MILCOM.2010.5680268","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680268","url":null,"abstract":"Adaptation is required for efficient transmission in a wireless communications network because of the fluctuations in propagation conditions that occur on the links. In a half-duplex packet radio network, the use of unicast transmission typically permits the receiving radio to send packet-by-packet acknowledgments and include a small amount of feedback information in each acknowledgment. For multicast transmission in such a network, it is usually not feasible for all receiving radios to send packet-by-packet acknowledgments, so a receiving radio has fewer opportunities to provide feedback. We present a low-complexity adaptive multicast transmission protocol that compensates for time-varying propagation losses in a packet radio network by adjusting the modulation and coding. Simple receiver statistics furnish the necessary control information for the adaptive protocol; no channel estimation, training, or pilot symbols are needed. The protocol's throughput performance is evaluated for dynamic channels and compared with the throughput of hypothetical ideal protocols that are given perfect channel-state information. We demonstrate that our protocol performs nearly as well as the ideal protocols.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"376 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133167341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Challenges and proposals for WiMAX-based military hybrid communications networks","authors":"Luis Bastos, H. Wietgrefe","doi":"10.1109/MILCOM.2010.5680449","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680449","url":null,"abstract":"Mission-critical, converged networks in support of NATO operations demand hybrid and secure transmission systems that are based on optical media and wireless transmission systems. The Hybrid Extension Module (HEM) Prototype implements a NATO C3 Agency (NC3A) concept for future Deployable Headquarter (DHQ) communications infrastructure in support of NATO Response Force (NRF) and expeditionary operations. WiMAX has long been identified as the candidate Internet Protocol-converged (IP) wireless technology for deployable Headquarter (DHQ) networks. NC3A has tested the HEM Prototype as a proof-of-concept demonstrator and test-bed in various scenarios. In different occasions, the validity of the hybrid nature of the network, the performance of WiMAX, the information security aspects, the self-organization mechanisms of the hybrid network, and the deployability aspects of the concept were challenged. This paper provides the description of a long series of revisions to the initial concepts and designs, which stemmed from tests and from the experience gained with the deployment of the Prototype. It also addresses with detail a revised concept of operations, together with the description of the new, optimized system design. A particular focus is devoted to improvements in communications security and in WiMAX capacity.","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133289878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New initiatives for imagery transmission over a tactical data link. A case study: JPEG2000 compressed images transmitted in a Link-16 network. method and results","authors":"M. Martinez-Ruiz, Antonio Artés-Rodríguez, Jose Antonio Diaz-Rico, Jose Blanco Fuentes","doi":"10.1109/MILCOM.2010.5680102","DOIUrl":"https://doi.org/10.1109/MILCOM.2010.5680102","url":null,"abstract":"This paper presents the results of an initiative to transmit imagery content through a Link-16 tactical network using a multirresolution approach based on wavelets to compress images [1]. Firstly, we identify the operational requirements. Secondly, we justify why JPEG2000 is our choice for coding still images. Thirdly, we propose a method to map the JPEG2000 code-stream into Link-16 free-text messages. We propose to send the most important part of the JPEG2000 compressed image in a more error resistant Link-16 packed structure and the remaining of the image in less robust data structures but at higher data rates. Finally, we present our results based on software simulations and laboratory tests with real Link-16 terminals including a comparative analysis with Link-16 enhance throughput. A configuration using two MIDS-LVTs has being set up, along with JPEG2000 coding and decoding software tools","PeriodicalId":330937,"journal":{"name":"2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE","volume":"102 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133454686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}