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Publications (10 of 141) Show all publications
Yang, G., Xiao, M., Al-Zubaidy, H., Huang, Y. & Gross, J. (2018). Analysis of Millimeter-Wave Multi-Hop Networks With Full-Duplex Buffered Relays. IEEE/ACM Transactions on Networking, 26(1), 576-590
Open this publication in new window or tab >>Analysis of Millimeter-Wave Multi-Hop Networks With Full-Duplex Buffered Relays
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2018 (English)In: IEEE/ACM Transactions on Networking, ISSN 1063-6692, E-ISSN 1558-2566, Vol. 26, no 1, p. 576-590Article in journal (Refereed) Published
Abstract [en]

The abundance of spectrum in the millimeter-wave (mm-wave) bands makes it an attractive alternative for future wireless communication systems. Such systems are expected to provide data transmission rates in the order of multi-gigabits per second in order to satisfy the ever-increasing demand for high rate data communication. Unfortunately, mm-wave radio is subject to severe path loss, which limits its usability for long-range outdoor communication. In this paper, we propose a multi-hop mm-wave wireless network for outdoor communication, where multiple full-duplex buffered relays are used to extend the communication range, while providing end-to-end performance guarantees to the traffic traversing the network. We provide a cumulative service process characterization for the mm-wave propagation channel with self-interference in terms of the moment generating function of its channel capacity. Then, we then use this characterization to compute probabilistic upper bounds on the overall network performance, i.e., total backlog and end-to-end delay. Furthermore, we study the effect of self-interference on the network performance and propose an optimal power allocation scheme to mitigate its impact in order to enhance network performance. Finally, we investigate the relation between relay density and network performance under a sum power constraint. We show that increasing relay density may have adverse effects on network performance, unless the selfinterference can be kept sufficiently small.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Millimeter-wave, multi-hop, moment generating functions, delay, backlog
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-224045 (URN)10.1109/TNET.2017.2786341 (DOI)000425324000042 ()2-s2.0-85041182670 (Scopus ID)
Note

QC 20180320

Available from: 2018-03-20 Created: 2018-03-20 Last updated: 2018-04-16Bibliographically approved
Yang, G., Xiao, M. & Pang, Z. (2018). Delay Analysis of Traffic Dispersion with Nakagami-m Fading in Millimeter-Wave Bands. In: : . Paper presented at IEEE Wireless Communications and Networking Conference, 15-18 April 2018 // Barcelona, Spain. Barcelona, Spain: IEEE
Open this publication in new window or tab >>Delay Analysis of Traffic Dispersion with Nakagami-m Fading in Millimeter-Wave Bands
2018 (English)Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Barcelona, Spain: IEEE, 2018
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-227345 (URN)
Conference
IEEE Wireless Communications and Networking Conference, 15-18 April 2018 // Barcelona, Spain
Projects
Wireless@KTH Seed Project “Millimeter Wave for Ultra-Reliable Low Latency Communications”
Funder
Wireless@kth
Note

QS 20180523

Available from: 2018-05-08 Created: 2018-05-08 Last updated: 2018-05-23Bibliographically approved
Liu, Y., Fang, X. & Xiao, M. (2018). Discrete Power Control and Transmission Duration Allocation for Self-Backhauling Dense mmWave Cellular Networks. IEEE Transactions on Communications, 66(1), 432-447
Open this publication in new window or tab >>Discrete Power Control and Transmission Duration Allocation for Self-Backhauling Dense mmWave Cellular Networks
2018 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 66, no 1, p. 432-447Article in journal (Refereed) Published
Abstract [en]

Wireless self-backhauling is a promising solution for dense millimeter wave (mmWave) small cell networks, the system efficiency of which, however, depends upon the balance of resources between the backhaul link and access links of each small cell. In this paper, we address the discrete power control and non-unified transmission duration allocation problem for self-backhauling mmWave cellular networks, in which each small cell is allowed to adopt individual transmission duration allocation ratio according to its own channel and load conditions. We first formulate the considered problem as a non-cooperative game G with a common utility function. We prove the feasibility and existence of the pure strategy Nash equilibrium (NE) of game G under some mild conditions. Then, we design a centralized resource allocation algorithm based on the best response dynamic and a decentralized resource allocation algorithm (DRA) based on control-plane/user-plane split architecture and loglinear learning to obtain a feasible pure strategy NE of game G. For speeding up convergence and reducing signaling overheads, we reformulate the considered problem as a non-cooperative game G' with local interaction, in which only local information exchange is required. Based on DRA, we design a concurrent DRA to obtain the best feasible pure strategy NE of game G'. Furthermore, we extend the proposed algorithms to the discrete power control and unified transmission duration allocation optimization problem. Extensive simulations are conducted with different system configurations to demonstrate the convergence and effectiveness of the proposed algorithms.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Dense millimeter wave (mmWave) cellular networks, wireless self-backhauling, power control, control-plane/user-plane (C-plane/U-plane) split architecture
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-221948 (URN)10.1109/TCOMM.2017.2757017 (DOI)000422754400033 ()2-s2.0-85030670863 (Scopus ID)
Funder
Wireless@kthEU, FP7, Seventh Framework Programme, PIRSESGA-2013-612652
Note

QC 20180130

Available from: 2018-01-30 Created: 2018-01-30 Last updated: 2018-02-02Bibliographically approved
Zhang, Z., Yang, G., Ma, Z., Xiao, M., Ding, Z. & Fan, P. (2018). Heterogeneous Ultradense Networks with NOMA System Architecture, Coordination Framework, and Performance Evaluation. IEEE Vehicular Technology Magazine, 13(2), 110-120
Open this publication in new window or tab >>Heterogeneous Ultradense Networks with NOMA System Architecture, Coordination Framework, and Performance Evaluation
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2018 (English)In: IEEE Vehicular Technology Magazine, ISSN 1556-6072, E-ISSN 1556-6080, Vol. 13, no 2, p. 110-120Article in journal (Refereed) Published
Abstract [en]

Heterogeneous ultradense networks (H-UDNs) are one key enabler for fifth-generation (5G) wireless networks and beyond to satisfy the explosive growth of mobile data traffic, which exploits spatial reuse of scarce spectrum by deploying massive base stations (BSS) to boost network capacity and enhance network coverage. In this article, we present the system architecture for 5G H-UDNs, consisting of virtualized integrated ground-Air-space radio access networks (RANs) and core networks and study network coordination for virtualized H-UDN to efficiently manage computing resources and intercell interference. We look at a cloud-fog-computing coordination framework for efficient computing resource management by achieving reasonable computing task distribution and transfer; computing load balance for computing tasks among virtual computing resources to improve network performance and computing resource efficiency; and a macro-small cell coordination framework for virtualized H-UDN with nonorthogonal multiple access (NOMA) to efficiently manage intercell interference and improve network performance. The joint macro-small enhanced intercell interference coordination (eICIC) and small-small coordinated multipoint joint transmission (CoMP-JT) scheme can efficiently eliminate macro-small intercell interference and utilize small-small intercell interference.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:kth:diva-230478 (URN)10.1109/MVT.2018.2812280 (DOI)000433094600016 ()2-s2.0-85046375092 (Scopus ID)
Note

QC 20180613

Available from: 2018-06-13 Created: 2018-06-13 Last updated: 2018-06-19Bibliographically approved
Zhang, Z., Yang, G., Ma, Z., Xiao, M., Ding, Z. & Fan, P. (2018). Heterogeneous Ultradense Networks with NOMA System Architecture, Coordination Framework, and Performance Evaluation. IEEE Vehicular Technology Magazine, 13(2), 110-120
Open this publication in new window or tab >>Heterogeneous Ultradense Networks with NOMA System Architecture, Coordination Framework, and Performance Evaluation
Show others...
2018 (English)In: IEEE Vehicular Technology Magazine, ISSN 1556-6072, E-ISSN 1556-6080, Vol. 13, no 2, p. 110-120Article in journal (Refereed) Published
Abstract [en]

Heterogeneous ultradense networks (H-UDNs) are one key enabler for fifth-generation (5G) wireless networks and beyond to satisfy the explosive growth of mobile data traffic, which exploits spatial reuse of scarce spectrum by deploying massive base stations (BSS) to boost network capacity and enhance network coverage. In this article, we present the system architecture for 5G H-UDNs, consisting of virtualized integrated ground-Air-space radio access networks (RANs) and core networks and study network coordination for virtualized H-UDN to efficiently manage computing resources and intercell interference. We look at a cloud-fog-computing coordination framework for efficient computing resource management by achieving reasonable computing task distribution and transfer; computing load balance for computing tasks among virtual computing resources to improve network performance and computing resource efficiency; and a macro-small cell coordination framework for virtualized H-UDN with nonorthogonal multiple access (NOMA) to efficiently manage intercell interference and improve network performance. The joint macro-small enhanced intercell interference coordination (eICIC) and small-small coordinated multipoint joint transmission (CoMP-JT) scheme can efficiently eliminate macro-small intercell interference and utilize small-small intercell interference.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-230410 (URN)10.1109/MVT.2018.2812280 (DOI)000433094600016 ()2-s2.0-85046375092 (Scopus ID)
Note

QC 20180620

Available from: 2018-06-20 Created: 2018-06-20 Last updated: 2018-06-20
Xing, W., Liu, F., Wang, C., Xiao, M. & Wang, P. (2018). Multi-Source Network-Coded D2D Cooperative Content Distribution Systems. Journal of Communications and Networks, 20(1), 69-84
Open this publication in new window or tab >>Multi-Source Network-Coded D2D Cooperative Content Distribution Systems
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2018 (English)In: Journal of Communications and Networks, ISSN 1229-2370, E-ISSN 1976-5541, Vol. 20, no 1, p. 69-84Article in journal (Refereed) Published
Abstract [en]

In this paper, we investigate the information transmission in a typical 5G device-to-device (D2D) communication application scenario, i.e., a content distribution system with a number of information sources intending to broadcast their messages to multiple destinations in the vicinity. Due to the dynamic nature of wireless signal propagation links, it is hard to guarantee a satisfactory performance by direct source-destination transmissions, especially when the system is operating in a reuse-mode. Relays can be introduced to the system to solve this problem. However, adopting the conventional repetition coding at relays inefficiently utilizes the available resources, for the considered multi-source scenario. Therefore, we investigate applying a class of finite-field network codes at the relays, when potentially three types of relays are deployed to assist the information distribution process. We proposed the algorithms to derive the system outage probability and analyze the trade-off between energy efficiency and spectral efficiency. Our analytical and numerical results clearly demonstrate the potential of exploiting network-coded cooperative communications in future 5G D2D systems.

Place, publisher, year, edition, pages
KOREAN INST COMMUNICATIONS SCIENCES (K I C S), 2018
Keywords
Cooperative communication, device-to-device (D2D) communication, energy efficiency, network coding, spectral efficiency
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-225747 (URN)10.1109/JCN.2018.000007 (DOI)000428149300007 ()2-s2.0-85044362954 (Scopus ID)
Note

QC 20180410

Available from: 2018-04-10 Created: 2018-04-10 Last updated: 2018-04-10Bibliographically approved
Cui, Y., Fang, X., Fang, Y. & Xiao, M. (2018). Optimal Nonuniform Steady mmWave Beamforming for High-Speed Railway. IEEE Transactions on Vehicular Technology, 67(5), 4350-4358
Open this publication in new window or tab >>Optimal Nonuniform Steady mmWave Beamforming for High-Speed Railway
2018 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 67, no 5, p. 4350-4358Article in journal (Refereed) Published
Abstract [en]

Using higher frequency bands (e.g., millimeter waves) to provide higher data rate is an effective way to eliminate performance bottleneck for future wireless networks, particularly for cellular networks based high-speed railway (HSR) wireless communication systems. However, higher frequency bands suffer from significant path loss and narrow-beam coverage, which pose serious challenges in cellular networks, especially under the HSR scenario. Meanwhile, as one of the key performance indexes of ultrareliable and low-latency communications in 5G systems, network reliability should be guaranteed to provide steady reliable data transmission along the railway, especially when safety-critical railway signaling information is delivered. In this paper, we propose a novel beamforming scheme, namely, optimal nonuniform steady mmWave beamforming, to guarantee the network reliability under an interleaved redundant coverage architecture for future HSR wireless systems. Moreover, we develop a bisection-based beam boundary determination (BBBD) method to determine the service area of each predefined RF beam. Finally, we demonstrate that the proposed optimal nonuniform steady mmWave beamforming can provide steady reliable data transmissions along the railway, and the network reliability requirements can be guaranteed when the proposed BBBD method is used. We expect that our optimal nonuniform steady mmWave beamforming provides a promising solution for future HSR wireless systems.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
5th-generation (5G) networks, millimeter wave, high speed railway (HSR), ultra-reliable and low-latency communications (URLLC), interleaved redundant coverage, optimal non-uniform beamforming
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-229025 (URN)10.1109/TVT.2018.2796621 (DOI)000432310500052 ()2-s2.0-85041001402 (Scopus ID)
Note

QC 20180531

Available from: 2018-05-31 Created: 2018-05-31 Last updated: 2018-05-31Bibliographically approved
Zhang, L., Xiao, M., Liu, J., Wu, G., Lin, D. & Li, S. (2018). Outage probability analysis and optimization in downlink NOMA systems with cooperative full-duplex relaying. In: IEEE Vehicular Technology Conference: . Paper presented at 86th IEEE Vehicular Technology Conference, VTC Fall 2017, 24 September 2017 through 27 September 2017 (pp. 1-5). Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Outage probability analysis and optimization in downlink NOMA systems with cooperative full-duplex relaying
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2018 (English)In: IEEE Vehicular Technology Conference, Institute of Electrical and Electronics Engineers Inc. , 2018, p. 1-5Conference paper, Published paper (Refereed)
Abstract [en]

We study a downlink non-orthogonal multiple access (NOMA) system with cooperative full-duplex relaying, where the near user in terms of the base station (BS) is enabled to act as a full-duplex relay for the far user. In particular, we first derive the outage probability with closed-form expressions when the power allocations at the BS and relay (or the near user) are fixed. Then, we analytically obtain the optimal power allocations with closed-form expressions at the BS and relay to minimize the outage probability. Numerical results validate the correctness of the theoretical analysis and demonstrate the advantages of the proposed algorithms over the state of arts.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Keywords
Cooperative relaying, Full-duplex, NOMA, Outage probability, Power allocation, Probability, Power allocations, Outages
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-227438 (URN)10.1109/VTCFall.2017.8288078 (DOI)2-s2.0-85045274173 (Scopus ID)9781509059355 (ISBN)
Conference
86th IEEE Vehicular Technology Conference, VTC Fall 2017, 24 September 2017 through 27 September 2017
Note

Conference code: 134637; Export Date: 9 May 2018; Conference Paper; CODEN: IVTCD; Funding details: Marie Curie Cancer Care; Funding details: 2013CB329001; Funding details: 61371105, NSFC, National Natural Science Foundation of China; Funding text: This work was supported in part by National 973 Programs 2013CB329001, National Natural Science Foundation of China under Grant 61371105, and EU Marie Curie Project, QUICK. QC 20180528

Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-05-28Bibliographically approved
Yang, G. & Xiao, M. (2018). Performance Analysis of Millimeter-Wave Relaying: Impacts of Beamwidth and Self-Interference. IEEE Transactions on Communications, 66(2), 589-600
Open this publication in new window or tab >>Performance Analysis of Millimeter-Wave Relaying: Impacts of Beamwidth and Self-Interference
2018 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 66, no 2, p. 589-600Article in journal (Refereed) Published
Abstract [en]

We study the maximum achievable rate of a two-hop amplified-and-forward (AF) relaying millimeter-wave (mm-wave) system, where two AF relaying schemes, i.e., half-duplex (HD) and full-duplex (FD) are discussed. By considering the two-ray mm-wave channel and the Gaussian-type directional antenna, jointly, the impacts of the beamwidth and the self-interference coefficient on maximum achievable rates are investigated. Results show that, under a sum-power constraint, the rate of FD-AF mm-wave relaying outperforms its HD counterpart only when antennas with narrower beamwidth and smaller self-interference coefficient are applied. However, when the sum-power budget is sufficiently high or the beamwidth of directional antenna is sufficiently small, direct transmission becomes the best strategy, rather than the AF relaying schemes. For both relaying schemes, we show that the rates of both AF relaying schemes scale as O(min{theta(-1)(m),theta(-2)(m)})with respect to beamwidth theta(m), and the rate of FD-AF relaying scales as O(mu(-(1/2))) with respect to self-interference coefficient mu. Also, we show that ground reflections may significantly affect the performance of mm-wave communications, constructively or destructively. Thus, the impact of ground reflections deserves careful considerations for analyzing or designing future mm-wave wireless networks.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
Millimeter-wave communications, amplify-and-forward relaying, Gaussian-type directional antenna, two-ray channel, beamwidth, self-interference
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-224036 (URN)10.1109/TCOMM.2017.2767041 (DOI)000425642400010 ()2-s2.0-85042281114 (Scopus ID)
Projects
Wireless@KTH Seed Project “Millimeter Wave for Ultra-Reliable LowLatency Communications”
Funder
Wireless@kth
Note

QC 20180320

Available from: 2018-03-20 Created: 2018-03-20 Last updated: 2018-05-23Bibliographically approved
Zhang, Z., Ma, Z., Lei, X., Xiao, M., Wang, C.-X. & Fan, P. (2018). POWER DOMAIN NON-ORTHOGONAL TRANSMISSION FOR CELLULAR MOBILE BROADCASTING: BASIC SCHEME, SYSTEM DESIGN, AND COVERAGE PERFORMANCE. IEEE wireless communications, 25(2), 90-99
Open this publication in new window or tab >>POWER DOMAIN NON-ORTHOGONAL TRANSMISSION FOR CELLULAR MOBILE BROADCASTING: BASIC SCHEME, SYSTEM DESIGN, AND COVERAGE PERFORMANCE
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2018 (English)In: IEEE wireless communications, ISSN 1536-1284, E-ISSN 1558-0687, Vol. 25, no 2, p. 90-99Article in journal (Refereed) Published
Abstract [en]

Power domain non-orthogonal transmission is a promising technology for 5G wireless networks and beyond, as it can achieve higher spectrum efficiency than the orthogonal kind by multiplexing multiple users in the power domain. This article studies power domain non-orthogonal transmission for cellular mobile broadcasting to satisfy the increasing demands on multimedia communications in 5G and beyond. We first present two schemes for non-orthogonal transmission-based cellular mobile broadcasting: multi-rate and multi-service superposition transmissions, and then discuss their information-theoretical perspectives. Furthermore, we provide system designs for virtualized network architecture and physical layer processing, and discuss the key elements. We present a general superposition transmission framework to integrate three schemes developed by the 3GPP and to reduce the complexity of implementation, and then study constellation rotation to improve the BER performance of superposition transmission. Finally, we evaluate the SINR coverage performance of the presented schemes, followed by the main challenges and future research directions.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-228282 (URN)10.1109/MWC.2018.1700125 (DOI)000431444200014 ()2-s2.0-85046671333 (Scopus ID)
Note

QC 20180521

Available from: 2018-05-21 Created: 2018-05-21 Last updated: 2018-05-21Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5407-0835

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