Seung Joon Lee, Yongjoo Tcha, Sang-Yong Seo, Seong-Choon Lee,
... be low, the use of both multicast and unicast channels for multicast service is considered in this letter. Unicast channels, in addition to a multicast channel, are ... transmission rate of the multicast channel. The used unicast channels consume additional radio resource. It is examined whether use of such unicast channels can raise the spectral efficiency defined as ... derived by maximizing the spectral efficiency. When a unicast channel is additionally allocated for multicast service, two ... is to use only the signal of a unicast channel, and the other is to use and ...
Tópico(s): Advanced Wireless Communication Techniques
2011 - IEEE Communications Society | IEEE Transactions on Communications
... extensively studied in the context of either pure unicast traffic or pure multicast traffic. Unfortunately, the results ... This paper deals with the problem of integrating unicast and multicast scheduling in an N × N input- ... buffers. Instead of using isolated switching fabrics for unicast and multicast traffic respectively, we efficiently utilize one switching fabric for both unicast and multicast traffic by a careful design. In ... design, each input port maintains a set of unicast queues based on virtual output queuing technique and ...
Tópico(s): Software-Defined Networks and 5G
2005 - Elsevier BV | Computer Networks
Syed Adeel Ali Shah, Muhammad Shiraz, Mostofa Kamal Nasir, Rafidah Md Noor,
... apart. In the existing literature, several proposals of unicast protocols exist that can be used for these non-safety applications. Among the proposals, unicast protocols for city scenarios are considered to be most challenging. This implies that in city scenarios unicast protocols show minimal persistence towards highly dynamic vehicular ... the diversity of vehicular characteristics and difficulty of unicast protocol adaption in city scenarios. The review starts with the categorization of unicast protocols for city scenarios according to their requirement ...
Tópico(s): Opportunistic and Delay-Tolerant Networks
2014 - Zhejiang University Press | Journal of Zhejiang University SCIENCE C
Wentao Huang, Tracey Ho, Michael Langberg, Jörg Kliewer,
This paper reduces multiple-unicast network coding to single-unicast secure network coding and single-unicast network error correction. Specifically, we present reductions that map an arbitrary multiple-unicast network coding instance to a unicast secure network coding instance in which at most one link is eavesdropped, or a unicast network error correction instance in which at most ... a rate tuple is achievable in the multiple-unicast network coding instance if and only if a corresponding rate is achievable in the unicast secure network coding instance, or in the unicast ...
Tópico(s): Wireless Communication Security Techniques
2018 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Information Theory
Andrey Samuylov, Dmitri Moltchanov, Roman Kovalchukov, Rustam Pirmagomedov, Yuliya Gaidamaka, Sergey Andreev, Yevgeni Koucheryavy, Konstantin Samouylov,
... New Radio (NR) systems is inherently beneficial for unicast transmissions by providing an extension of the coverage ... NR AP serving a mixture of multicast and unicast traffic. Our numerical results indicate that the service process of unicast sessions is severely compromised when (i) the fraction of unicast sessions is significant, (ii) the spatial session arrival ... multicast sessions is longer than that of the unicast sessions. To balance the multicast and unicast session drop probabilities, an explicit prioritization is required. ...
Tópico(s): Power Line Communications and Noise
2020 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Wireless Communications
Junlin Zhao, Denız Gündüz, Osvaldo Simeone, David Gómez‐Barquero,
... non-orthogonal multiple access (NOMA), can potentially improve unicast throughput and broadcast coverage with respect to traditional ... the same frequency and time resources for multiple unicast or broadcast transmissions. In this paper, the performance of LDM-based unicast and broadcast transmission in a cellular network is ... the base stations (BSs) for the transmission of unicast data streams. Beamforming and power allocation between unicast and broadcast layers, the so-called injection level ... sum-power under constraints on the user-specific unicast rates and on the common broadcast rate. The ...
Tópico(s): PAPR reduction in OFDM
2019 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Broadcasting
Yijie Mao, Bruno Clerckx, Victor O. K. Li,
In a Non-Orthogonal Unicast and Multicast (NOUM) transmission system, a multicast stream intended to all the receivers is superimposed in the power domain on the unicast streams. One layer of Successive Interference Cancellation (SIC) ... remove the multicast stream before decoding its intended unicast stream. In this paper, we first show that ... this existing SIC receiver architecture. By splitting the unicast messages into common and private parts and encoding ... reused for the dual purpose of separating the unicast and multicast streams as well as better managing ...
Tópico(s): Full-Duplex Wireless Communications
2019 - IEEE Communications Society | IEEE Transactions on Communications
Dong-Hee Kim, Farooq Khan, Cornelius van Rensburg, Zhouyue Pi, Seokhyun Yoon,
... application of superposition coding in multiplexing broadcast and unicast for OFDM-based mobile cellular systems is discussed. ... interference-plus-noise ratio, is well matched for unicast and broadcast in a single-frequency network configuration. ... single step, minimizing the interference from broadcast to unicast. Issues related with scheduling and strategy for time, frequency and power resource sharing between broadcast and unicast are discussed. The application of superposed broadcast and unicast is then extended to MIMO systems. Simulation results ...
Tópico(s): Advanced Wireless Network Optimization
2008 - Institute of Electrical and Electronics Engineers | IEEE Communications Magazine
Masoud Daneshtalab, Masoumeh Ebrahimi, Thomas Canhao Xu, Pasi Liljeberg, Hannu Tenhunen,
Several unicast routing protocols have been presented for unicast traffic in MPSoCs. Exploiting the unicast routing algorithms for multicast traffic increases the likelihood ... The traditional Hamiltonian path routing protocols supporting both unicast and multicast traffic are based on deterministic models, ... we propose an adaptive routing protocol for both unicast and multicast traffic without using virtual channels. The ... Hamiltonian path while guaranteeing deadlock freedom. Furthermore, both unicast and multicast aspects of the presented method have ...
Tópico(s): Embedded Systems Design Techniques
2010 - Elsevier BV | Journal of Systems Architecture
Produção Nacional
Revisado por pares
Luís Henrique M. K. Costa, Serge Fdida, Otto Carlos M. B. Duarte,
... Internet is likely to be organized with both unicast and multicast enabled networks. Thus, it is of ... progressive deployment of the multicast service by supporting unicast clouds. This paper presents HBH (hop-by-hop ... address allocation and implements data distribution using recursive unicast trees, which allow the transparent support of unicast-only routers. An important original feature of HBH ... tree construction algorithm that takes into account the unicast routing asymmetries. Since most multicast routing protocols rely ...
Tópico(s): Mobile Ad Hoc Networks
2006 - Institute of Electrical and Electronics Engineers | IEEE/ACM Transactions on Networking
H. Zhang, X. Wang, Fukang Li, Huaiyu Dai,
To support the multicast and unicast services in the orthogonal frequency division multiplexing system simultaneously, a channel-aware adaptive resource allocation algorithm is proposed to maximise the total throughput of the unicast service while guaranteeing the required quality of service ( ... subcarriers are allocated to the multicast and the unicast services under the assumption that power is divided ... is applied to allocate the subcarriers to the unicast service by elaborately constructing the energy function to ...
Tópico(s): Wireless Communication Networks Research
2012 - Institution of Engineering and Technology | IET Communications
Sudeep Kamath, Venkatachalam Anantharam, David Tse, Chih-Chun Wang,
... communication capacity of wireline networks for a two-unicast traffic pattern. The network has two sources and ... is the tightest edge-cut bound for two-unicast networks and is tight in several cases, though ... show that despite its seeming simplicity, the two-unicast problem is a very difficult problem: the general network coding problem can be reduced to two-unicast. As a consequence, linear coding is insufficient to achieve capacity for general two-unicast networks, and non-Shannon inequalities are necessary for ...
Tópico(s): Full-Duplex Wireless Communications
2016 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Information Theory
Unicast in computer/communication networks is a one-to-one communication between a source node s and ... nonfaulty routing path between s and t for unicast in the hypercube with a large number of ... s,t)+4 in O(n) time for unicast between 1-safe s and t in the ... s,t)+6 in O(n) time for unicast in the 2-safe H/sub n/ with | ... sup 2/) in time O(|F|+n) for unicast in the k-safe H/sub n/ with | ... the path lengths found by the algorithms for unicast in the 1-safe and 2-safe hypercubes ...
Tópico(s): Software-Defined Networks and 5G
1999 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Parallel and Distributed Systems
Erkai Chen, Meixia Tao, Ya‐Feng Liu,
... layered-division multiplexing (LDM) to support multicast and unicast services concurrently in cooperative multi-cell cellular networks ... for multicast services, the second layer is for unicast services, and the two layers are superposed with ... first, subtracts it, and then decodes its dedicated unicast message. We formulate a joint multicast and unicast beamforming problem with adaptive base station clustering that ... weighted sum of the multicast rate and the unicast rate under per-BS power and backhaul constraints. ...
Tópico(s): Advanced Wireless Communication Technologies
2018 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Wireless Communications
Hongyi Zhan, Guang Zeng, Qigui Wang, Congjie Wang, Pan Wang, Zhou Wang, Yiwu Xu, Devin Hess, Paul N. Crepeau, Jeff Wang,
... this paper is to present a Unified Casting (UniCast) Al alloy concept as a sustainable materials solution for vehicle lightweighting. The UniCast alloy chemistry is intentionally designed to be more ... that are produced by various casting processes. The UniCast alloy concept will contribute to the establishment of ... life vehicles can be directly recycled back into UniCast alloy ingot with a more efficient sorting process. ... the upper limit of Fe content in the UniCast alloy to a higher level, it will become ...
Tópico(s): Bauxite Residue and Utilization
2023 - Elsevier BV | Journal of Material Science and Technology
Xidong Mu, Yuanwei Liu, Li Guo, Jiaru Lin, Lajos Hanzo,
... multiple access (NOMA) aided joint radar and multicast-unicast communication (Rad-MU-Com) is investigated. Employing the ... centric users (R-user), while transmitting mixed multicast-unicast messages both to the R-user and to ... both the R- and C-users, whereas the unicast information is only intended for the C-user. ... this double spectrum sharing, where the multicast and unicast signals are superimposed in the power domain and ... single C-user. Based on this framework, the unicast rate maximization problem is formulated by optimizing the ...
Tópico(s): PAPR reduction in OFDM
2022 - Institute of Electrical and Electronics Engineers | IEEE Journal on Selected Areas in Communications
Sara Pizzi, Massimo Condoluci, Giuseppe Araniti, Antonella Molinaro, Antonio Iera, Gabriel‐Miro Muntean,
... strategies to jointly handle multicast and more traditional unicast traffic and to increase user satisfaction is of ... an efficient radio resource management framework to handle unicast and multicast multi-layer video services.The proposed ... subgrouping principle to provide fair throughput to both unicast and multicast users.The idea is to assign unicast subscribers to a virtual group thus allowing them ... and fairness in the distribution of resources to unicast and multicast users.
Tópico(s): Advanced MIMO Systems Optimization
2016 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Wireless Communications
Frank Hartung, Uwe Horn, J. Huschke, Markus Kampmann, Thorsten Lohmar, M. Lundevall,
... TV was often associated with broadcast transmission. However, unicast technology is sufficient in many cases, especially since ... mobile networks, which have been primarily optimized for unicast services. Based on a traffic model we will discuss the capacity limits of 3G networks for unicast distribution of Mobile TV. From the results it ... and are favorably combined with MBMS or 3G unicast distribution in order to create complete end-to- ... over 3G networks, the advantages of broadcast and unicast should be combined. We argue that hybrid unicast- ...
Tópico(s): Advanced Wireless Network Optimization
2007 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Broadcasting
Feng Zhang, Wen‐De Zhong, Zhaowen Xu, Tee Hiang Cheng, Craig Michie, Ivan Andonović,
... node, the broadcast channel and a dedicated downlink unicast channel can be overlaid and subsequently transmitted to ... approach of overlaying DPSK multicast data onto NRZ unicast data using the same wavelength. As such, this ... restrict the extinction ratio (ER) of the NRZ unicast data to a small value. Simulation studies show ... channel and thirty-two 10 Gb/s downlink unicast channels, and thirty-two 2.5 Gb/s uplink unicast channels. Another advantage of this WDM-PON is ... causes a small interference with the downlink/uplink unicast channels, and it is shared by all the ...
Tópico(s): Advanced Optical Network Technologies
2011 - Institute of Electrical and Electronics Engineers | Journal of Lightwave Technology
Surachai Chieochan, Ekram Hossain,
... to wireless devices whose dominant traffic pattern is unicast. In the meantime, the emergence of network coding ... flows. Little is known about network coding for unicast, however. The objective of this paper is thus ... multicast scenarios and shed light on several possible unicast scenarios to which network coding may be applied ... To illustrate the benefits of network coding for unicast in a WiFi hotspot, we propose and implement ... channel multi-radio repeaters are used to relay unicast traffic for those terminals sitting far away from ...
Tópico(s): Wireless Networks and Protocols
2012 - Elsevier BV | Computer Networks
Produção Nacional
Lu Henrique M. K. Costa, Serge Fdida, Otto Carlos M. B. Duarte,
... Internet is likely to be organized with both unicast and multicast enabled networks. Thus, it is of ... progressive deployment of the multicast service by supporting unicast clouds. This paper proposes HBH (Hop-By-Hop ... address allocation and implements data distribution using recursive unicast trees, which allow the transparent support of unicast-only routers. Additionally, HBH is original because its tree construction algorithm takes into account the unicast routing asymmetries. As most multicast routing protocols rely ...
Tópico(s): Network Packet Processing and Optimization
2001 - Association for Computing Machinery | ACM SIGCOMM Computer Communication Review
Meysam Sadeghi, Emil Björnson, Erik G. Larsson, Chau Yuen, Thomas L. Marzetta,
We study the joint unicast and multi-group multicast transmission in massive multiple-input-multiple-output (MIMO) systems. We consider a system model that accounts ... contamination, and derive achievable spectral efficiencies (SEs) for unicast and multicast user terminals (UTs), under maximum ratio transmission and zero-forcing precoding. For unicast transmission, our objective is to maximize the weighted sum SE of the unicast UTs, and for the multicast transmission, our objective ... is convex, hence the system should serve the unicast and multicast UTs at the same time-frequency ...
Tópico(s): Advanced Wireless Communication Technologies
2018 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Wireless Communications
David Vargas, Yong Jin Daniel Kim,
... particular, two-layered superposition of broadcast/multicast and unicast signals is considered in a downlink multiuser OFDMA ... message has higher priority than the K individual unicast messages, and OM cannot be sum-rate optimal ... main use-cases are considered: i) Multicast and unicast multiplexing when K users with uplink capabilities request ... common and independent messages, and ii) broadcast and unicast multiplexin when the common message targets receive-only ... develop a transceiver design for broadcast/multicast and unicast superposition transmission based on LTE-A-Pro physical ...
Tópico(s): Advanced Wireless Communication Techniques
2019 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Wireless Communications
Internet traffic is a mixture of unicast and multicast flows. Integrated schedulers capable of dealing with both traffic types have been designed mainly for Input Queued (IQ) buffer-less ... propose a novel CICQ architecture that supports both unicast and multicast traffic along with its appropriate scheduling. ... round-robin-based scheduler that efficiently services both unicast and multicast traffic simultaneously. Our scheme, named multicast and unicast round robin scheduling (MURS), has been shown to ...
Tópico(s): Parallel Computing and Optimization Techniques
2009 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Parallel and Distributed Systems
Daniel Catrein, Jörg Huschke, Uwe Horn,
... TV services in cellular spectrum are delivered over unicast radio bearers as offered by 3G technologies like WCDMA and HSDPA. Since unicast transmission does not scale very well if mobile ... of MBMS is its support for hybrid broadcast-unicast transmission. In this mode the more popular channels ... when delivering mobile TV services over hybrid broadcast-unicast transmission schemes provided by MBMS.
Tópico(s): Telecommunications and Broadcasting Technologies
2008 - Institute of Electrical and Electronics Engineers | IEEE Vehicular Technology Conference
Seon Yeob Baek, Young‐Jun Hong, Dan Keun Sung,
... developed to support users' various requirements. Multicast and unicast transmission schemes are proposed for various types of ... instantaneous worst channel user. On the other hand, unicast transmission exploits wireless channel variation and achieves a ... and compare the system performance of multicast and unicast transmission schemes in terms of system capacity, worst ... novel hybrid scheduling scheme for mixed multicast and unicast traffic services and compare the proposed scheme with ...
Tópico(s): Cooperative Communication and Network Coding
2008 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Vehicular Technology
J.J. Garcia‐Luna‐Aceves, Rolando Menchaca-Méndez,
A framework for integrated multicast and unicast routing in mobile ad hoc networks (MANETs) is introduced. It is based on interest-defined mesh enclaves that are connected components of a MANET spanning the sources and receivers of unicast or multicast flows. The Protocol for Routing in ... delivery and end-to-end delays than traditional unicast and multicast routing schemes for MANETs (AODV, OLSR, ... than the one used by traditional multicast and unicast routing protocols such as AODV, OLSR, or ODMRP.
Tópico(s): Vehicular Ad Hoc Networks (VANETs)
2011 - Institute of Electrical and Electronics Engineers | IEEE/ACM Transactions on Networking
Zahra Mobini, Parastoo Sadeghi, Majid Khabbazian, S. Zokaei,
... physical-layer network coding (PNC) in a multi-unicast wireless cooperative network with a single relay. We ... provide a closed-form solution for the two-unicast case. Simulation results show that the proposed relay ... 64% overall data rate gain for the multi-unicast system compared with a single-group system with ... PNC can be efficiently harnessed in a multi-unicast cooperative network by exploiting proposed approaches.
Tópico(s): Advanced Wireless Communication Technologies
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Vehicular Technology
Rakesh Radhakrishnan, Balaaji Tirouvengadam, Amiya Nayak,
... to achieve this goal. Video services use both unicast and multicast video transmission based on its applications. ... a scheduling scheme based on channel quality for unicast and multicast video transmissions. In our proposed unicast scheme, Channel Quality Indicator (CQI) feedbacks from User ... used to achieve the channel dependent adaptation for unicast in video server. Simulation results for unicast indicate improved video quality for more number of ...
Tópico(s): Advanced MIMO Systems Optimization
2012 - | Network Protocols and Algorithms
... paper presents a new parallel algorithm for routing unicast (one-to-one) assignments in Benes networks. Parallel ... on two different topologies. The algorithm routes a unicast assignment involving O(k) pairs of inputs and ... algorithm can be pipelined to route /spl alpha/ unicast assignments each involving O(k) pairs of inputs ... fast as Nassimi and Sahni's algorithm for unicast assignments, and with pipelining, it is faster than ...
Tópico(s): Algorithms and Data Compression
1995 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Parallel and Distributed Systems