{"title":"A novel approach to implementation of quantum entanglement purification in optical quantum communication","authors":"S. Salemian, S. Nejad","doi":"10.1109/CSNDSP.2008.4610738","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610738","url":null,"abstract":"Entanglement purification is essential to distill highly entangled states from less entangled ones. Existing general purification protocols are based on the quantum controlled-NOT (CNOT) or similar quantum logic operations, which are very difficult to implement experimentally. Here we present a feasible scheme for the implementation of entanglement purification based on planar lightwave circuit (PLC) implementation of quantum CNOT gate. This quantum gate is realized by using interferometric electro-optic modulator. By using planar lightwave circuit in implementation, the width of waveguides and the length of CNOT gate were obtained 12 micron and 2.8 cm respectively","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125126368","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}
V. Vassilakis, G. Kallos, I. Moscholios, M. Logothetis
{"title":"Evaluation of a call admission control scheme in W-CDMA cellular networks","authors":"V. Vassilakis, G. Kallos, I. Moscholios, M. Logothetis","doi":"10.1109/CSNDSP.2008.4610806","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610806","url":null,"abstract":"In this paper, we evaluate a call admission control (CAC) scheme suitable for W-CDMA cellular networks accommodating multiple service-classes. In such networks, the distinction between the new and the handoff traffic is very important. A simple CAC scheme can distinguish the calls between the two traffic types by setting different thresholds for call admission. This simple CAC scheme is evaluated in respect of blocking probabilities of both new and handoff calls. To this end, we formulate an aggregate Markov chain, which describes both the new-call and handoff-call arrival processes, under the assumption that they are both Poisson processes. Based on this Markov chain we derive recurrent and computationally efficient formulas for the calculation of the system state probabilities. Consequently, we calculate the new-call and handoff-call blocking probabilities. The analytical results are verified through simulation and found to be absolutely satisfactory.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133445186","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":"Authentication process based on the synchronization of chaotic oscillator networks","authors":"L. Laval","doi":"10.1109/CSNDSP.2008.4610742","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610742","url":null,"abstract":"With regard to secure communication or filtered access purposes, this paper presents an authentication process which involves the controlled (i.e. forced) synchronization of several continuous-time chaotic systems. This process is mainly based on setting up a ring network of three unidirectionally coupled Chuapsilas oscillators, where one chaotic subsystem represents the ldquoidentification keyrdquo (i.e. a claimed identity to be authenticated) while the two others can be viewed as locking/unlocking devices. The proposed authentication protocol then consists in performing a kind of tripartite handshaking procedure1 by means of synchronizing some state trajectories of interest with respect to a particular chronology. To deal with such an objective and temporal constraints, this paper investigates the use of sliding mode controllers to drive each chaotic subsystem. Thus, after describing the authentication process, this paper focuses on the controlled, partial synchronization of the three subsystems. Then two illustrative examples with right and wrong chaotic ldquoidentification keysrdquo are presented.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"83 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132795220","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":"Distributed mobility management for fast terminals in an IP-based micro-cellular network along roads","authors":"T. Yamada, S. Yamashita, T. Okumura, P. T. Hoa","doi":"10.1109/CSNDSP.2008.4610703","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610703","url":null,"abstract":"This paper presents a scalable control system for a unified micro-cellular network named MM-MAN (mobile multimedia metropolitan area network) in which fast terminals are provided high-bit rate IP packet transfer. In our previous papers, proposed schemes to guarantee smooth connections to fast movers in spite of frequent movement are LMC (logical macro cell) and parallel polling. LMC-a multicast group of adjacent micro-cells and pollings are emitted from all BSs of the same LMC create a symmetric environment as a virtual single cell so the cell-to-cell movement of a mobile terminal within an LMC can be passed over. Detail of the distributed control for mobility management is described in this article. An extended LMC is introduced to conduct pre-downloading of packets and to allow distributed processing for the LMC switchover. However, the radio active channel is manipulated only at BSs in the LMC range but not in the extended LMC to save radio resources due to the overhead of parallel polling. If the polling response comes to the BS which differs from the central cellpsilas BS of the LMC, this BS will be placed to become the central cell of the new LMC, and polling acknowledgement is multicast to the new extended LMC. The neighboring BS on the movement direction of the target mobile terminal (MT) can realize movement of the MT, and starts actions to join the new LMC by itself without help from the centralized control. These procedures can hide the delay in the cell-to-cell movement of the terminal even when it goes out from the LMC, and guarantee scalable and high-performance control over micro-cellular network. The simulation results tells the handover latency is less than 5 ms, and the throughput for MT in case of the continuous multimedia like moving picture is 2 Mbps over the 54 Mbps wireless interface.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130749567","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}
H. Eichelberger, G. Prattes, K. Schwingenschuh, O. Aydogar, B. Besser, I. Jernej, H. Lammer, E. Leitgeb, H. Lichtenegger, M. Stachel, T. Tokano
{"title":"Space and atmospheric planetary communication links as scientific tools","authors":"H. Eichelberger, G. Prattes, K. Schwingenschuh, O. Aydogar, B. Besser, I. Jernej, H. Lammer, E. Leitgeb, H. Lichtenegger, M. Stachel, T. Tokano","doi":"10.1109/CSNDSP.2008.4610741","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610741","url":null,"abstract":"We investigate the combined use of acoustic, radio frequency and optical links for communication and scientific purposes for possible upcoming planetary missions, e.g., the proposed TandEM mission to the Saturnian moons Enceladus and Titan in the frame of ESApsilas Cosmic Vision 2015-2025 call. Based on experience with balloon flights and in-situ measurements in the venusian and terrestrial atmospheres and planetary probes at Jupiter, Mars and Titan, the major emphasis is on communication in planetary atmospheres.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132349691","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}
N. Perlot, E. Duca, J. Horwath, D. Giggenbach, E. Leitgeb
{"title":"System requirements for optical HAP-satellite links","authors":"N. Perlot, E. Duca, J. Horwath, D. Giggenbach, E. Leitgeb","doi":"10.1109/CSNDSP.2008.4610724","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610724","url":null,"abstract":"Between a high-altitude platform (HAP) in the stratosphere and a satellite, high-data-rate optical links are conceivable but the challenges are still not clearly identified. We thus review the main requirements to properly establish such links. The design of a HAP-LEO link is in several aspects different from that of a HAP-GEO link. Among others, we consider the possible limitations caused by atmospheric propagation, the Sun and the environment of the HAP terminal. Signal transmission appears markedly more difficult when the optical beam must propagate near the HAP horizon or below.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115173039","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}
M. Quaritsch, Mario Wiesinger, B. Strobl, Bernhard Rinner
{"title":"An adaptive multi-purpose transmission scheme for H.264 encoded video in wireless networks","authors":"M. Quaritsch, Mario Wiesinger, B. Strobl, Bernhard Rinner","doi":"10.1109/CSNDSP.2008.4610708","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610708","url":null,"abstract":"Transmitting live video data is crucial in almost any surveillance application. Although the emerging research field of smart cameras promises to automate video analysis, human operators are still required to initiate the according actions in the case of an alarm. Therefore, it is important to have high-quality real-time video of the corresponding scenes. Usually, video data also has to be archived for later analysis. This paper presents a novel transmission scheme for encoded video data which allows for low-latency transmissions as it is required for live watching and reliable transmissions for archiving simultaneously in a single connection. The proposed transmission scheme uses SCTP as transport layer protocol and is designed for H.264 encoded video, but can be adapted to other video encoding standards as well. The real-world evaluation shows that this novel transmission scheme is competitive to the widely used RTP/UDP method. When incorporating limited bandwidth and packet- loss our approach outperforms RTP/UDP regarding the number of received frames as well as quality of the perceived video.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116448506","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":"Electronic signal processing for Optical Code Division Multiple Access Networks","authors":"M. Pimenta, I. Darwazeh","doi":"10.1109/CSNDSP.2008.4610750","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610750","url":null,"abstract":"This work demonstrates the potential of electronic signal processing for applications in optical code division multiple access networks. The proposed designs are based in distributed topologies allowing operation at speeds close to the cut-off frequency of the transistors employed. We discuss structures capable of encoding and decoding time-domain and multi-wavelength optical CDMA signals. A scheme for mitigating of the impact of group velocity dispersion in multi-wavelength OCDMA systems is also analysed.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122487967","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":"An adaptive burst assembly scheme for OBS-GRID networks","authors":"N. Korkakakis, K. Vlachos","doi":"10.1109/CSNDSP.2008.4610759","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610759","url":null,"abstract":"This paper addresses the problem of burst assembly in OBS-GRID networks and particularly the TCP throughput maximization problem for large file sizes. For that purpose, a novel adaptive size-based approach is proposed, following some probabilistic methods and considering the effect of the burstification process in the overall transport system. The scheme has been evaluated in a high capacity GRID network. It was found that the proposed scheme results in shorter file transfer times, a significant higher TCP throughout, thus yielding a positive impact at the grid mechanics. The performance of the scheme is compared to that of a timer-based algorithm.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125355427","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":"Improvement on Cooperative Balanced Space-Time Block Coding with relay selection","authors":"A. Eksim, M. Çelebi","doi":"10.1109/CSNDSP.2008.4610778","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610778","url":null,"abstract":"In this paper, we improve the performance of cooperative balanced space-time block codes (CBSTBC) by means of a novel relay selection method. The proposed method prevents an error floor with minimal sacrifice from the full diversity for any number of mobile relays. In the new method, the relays transmit their source-relay channel partial information to the destination with one bit and the destination informs the source and the relays about the selected balanced code and the selected relays with few bits of feedback. For a comparison, we consider distributed space time block codes (DSTBC). As expected, DSTBC perform poorly when source-relay channels have low SNR, thus, an error floor is reached. Detailed computer simulations show that, in our proposed method the occurring of the error floor shifts considerably to higher SNR region.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125380579","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}