| 1. |
- Chaparadza, Ranganai, et al.
(author)
-
Implementation Guide for the ETSI AFI GANA Model : a Standardized Reference Model for Autonomic Networking, Cognitive Networking and Self-Management
- 2013
-
In: Proceedings of 2013 IEEE Globecom Workshops. - : IEEE Computer Society. - 9781479928514 ; , s. 935-940
-
Conference paper (peer-reviewed)abstract
- This paper describes an Implementation Guide for an emerging standard for autonomic management &control of networks and services, namely the ETSI AFI GANA Reference Model for Autonomic Networking, Cognitive Networking and Self-Management (an emerging standard from ETSI). The implementation guide also takes into consideration the impact of emerging paradigms such as SDN and Virtualization. This is because as the standardized Reference Model has been published, it becomes important to provide an associated Implementation Guide that can be followed in implementing autonomic management & control in network architectures.
|
|
| 2. |
- Chaparadza, Ranganai, et al.
(author)
-
SDN Enablers in the ETSI AFI GANA Reference Model for Autonomic Management & Control (emerging standard), and Virtualization Impact
- 2013
-
In: Proceedings of 2013 IEEE Globecom Workshops. - : IEEE Computer Society. - 9781479928514 ; , s. 818-823
-
Conference paper (peer-reviewed)abstract
- This standardization oriented paper describes the SDN (Software-Driven Networking) Enablers in the ETSI AFI GANA Reference Model for Autonomic Management & Control (an emerging standard from ETSI), and impact of Virtualization. This is because in this study we see that Autonomic Management & Control and SDN (Software-Driven Networking) share the same objective of enabling programmable, manageable, dynamically self-adaptable and cost-effective networks and services. SDN enablers in the AFI GANA Model are: (1) Modularization of Logically centralized Control Software (the GANA Network Level DEs in the GANA Knowledge Plane) and Reference Points Definitions; (2) Primitives for Programmability at various layers; (3) Use of Runtime Executable Behavioral Models to complement the use of Policy-Control and dynamic policies; (4) The role and value the GANA MBTS (Model Based Translation Service) brings in SDN; (5) The role and value the GANA ONIX (Overlay Network for Information eXchange) brings in SDN; (6) Interworking GANA Knowledge Plane Decision Elements and SDN Controllers; (7) GANA “Decision-Making-Elements” logics as “software” that can be loaded into nodes and network (enabling “software-empowered networks”). The study is important because it is now becoming critical to study and explore the relationships between Autonomic Management & Control and SDN paradigms, as well as Virtualization, identify complementarities between the paradigms and close the gaps by unifying SDN concepts and associated frameworks with the emerging ETSI AFI GANA Reference Model standard for Autonomic Networking, Cognitive Networking and Self-Management, a hybrid model enabling to combine both centralized and distributed control.
|
|
| 3. |
- Oljira, Dejene Boru, et al.
(author)
-
Energy-Efficient Data Replication in Cloud Computing Datacenters
- 2013
-
In: 2013 IEEE GLOBECOM WORKSHOPS (GC WKSHPS). - : IEEE. - 9781479928514 ; , s. 446-451
-
Conference paper (peer-reviewed)abstract
- Cloud computing is an emerging paradigm that provides computing resources as a service over a network. Communication resources often become a bottleneck in service provisioning for many cloud applications. Therefore, data replication, which brings data (e.g., databases) closer to data consumers (e.g., cloud applications), is seen as a promising solution. It allows minimizing network delays and bandwidth usage. In this paper we study data replication in cloud computing data centers. Unlike other approaches available in the literature, we consider both energy efficiency and bandwidth consumption of the system, in addition to the improved Quality of Service (QoS) as a result of the reduced communication delays. The evaluation results obtained during extensive simulations help to unveil performance and energy efficiency tradeoffs and guide the design of future data replication solutions.
|
|
| 4. |
- Thanos, Anastasios, et al.
(author)
-
Network-Assisted Discovery for Device-to-Device Communications
- 2013
-
In: 2013 IEEE Globecom Workshops (GC Wkshps). - : IEEE Computer Society. - 9781479928514 ; , s. 660-664
-
Conference paper (peer-reviewed)abstract
- Network-assisted device-to-device (D2D) communications allow two devices to communicate with each other directly using one bidirectional link. Exchange of signaling messages with the base station allows the establishment of D2D communications. The discovery of D2D pairs of devices is an essential part of D2D communications as it provides the base station with all the information necessary to evaluate the possibility of D2D communication for the pair. This paper proposes two discovery algorithms, the centralized fully network-dependent and the semi centralized semi-network-dependent algorithms to identify D2D pairs through the exchange of a number of signaling messages. A comparison between those algorithms is performed with respect to delay and signaling overhead. Simulation results show that the second discovery algorithm is faster and more efficient than the first one in discovering new D2D pairs.
|
|
| 5. |
- Wanlu, Sun, 1986, et al.
(author)
-
Distributed clock synchronization with application of D2D communication without infrastructure
- 2013
-
In: 2013 IEEE Globecom Workshops, GC Wkshps 2013; Atlanta, GA; United States; 9 December 2013 through 13 December 2013. - 9781479928514 ; , s. 561-566
-
Conference paper (peer-reviewed)abstract
- This paper investigates the clock synchronization problem for Device-to-Device (D2D) communication without infrastructure. Employing affine models for local clocks, it is proposed a random broadcast based distributed consensus clock synchronization algorithm. In the absence of transmission delays, we theoretically prove the convergence of the proposed scheme, which is further illustrated by the numerical evaluations. On the other hand, when the delays are also taken into account, the proposed approach still performs well. Besides, it is further concluded from the simulations that the proposed scheme is robust against dynamic topologies and scalable to the increased number of devices, and has a fast speed regarding the synchronization error decrease. © 2013 IEEE.
|
|
| 6. |
- Yutao, Sui, 1984, et al.
(author)
-
Uplink enhancement of vehicular users by using D2D communications
- 2013
-
In: 2013 IEEE Globecom Workshops, GC Wkshps 2013. - 9781479928514 ; , s. 649-653
-
Conference paper (peer-reviewed)abstract
- In this paper, we discuss one application enabled by device-to-device (D2D) communication for vehicular users inside well isolated public transportation vehicles. We study the feasibility of using D2D communication to enhance the uplink communication for vehicular user equipment (VUE) devices. D2D communication allows fast data exchange among VUE devices, and therefore, a number of VUE devices can cooperate with each other and send data to the base station (BS) together. We employ a generalized co-phasing technique for the cooperation with perterminal power constraint, and compare the energy efficiency of single user direct transmission, and cooperative transmission participated by various number of VUE devices. As the public transportation vehicle moves away from the BS and for large vehicular penetration loss, less energy is required to send the same amount of data of each active VUE in the cooperative transmission than the individual VUE-to-BS communications. Hence VUE devices in well isolated vehicles, especially those ones with limited battery lives, can save energy because of the enhanced uplink communications. © 2013 IEEE.
|
|
| 7. |
- Özyagci, Ali, 1982-, et al.
(author)
-
Effect of propagation environment on area throughput of dense WLAN deployments
- 2013
-
In: 9th IEEE Broadband wireless access workshop (BWA 2013). - : IEEE Computer Society. - 9781479928514 ; , s. 333-338
-
Conference paper (peer-reviewed)abstract
- Indoor wireless LAN deployments have become ubiquitous. As WLAN deployments become increasingly dense, WLANs start to cause more and more contention and interference to each other, to the point that they cause significant throughput degradation to other WLANs. Since WLANs are one of the most commonplace solutions to provide indoor broadband data access, it is crucial to assess the throughput limits of WLANs in order to understand at what demand level novel broadband access mechanisms will be critically needed. The amount of contention and interference that coexisting WLANs create on each other is influenced by the indoor propagation environment such as existence of walls or clutter. Although the indoor propagation environment has a significant impact on the interaction between WLANs, and consequently on the area throughput, the relationship between the indoor propagation environment and achievable area throughput has not received much attention. In this paper, we investigate the area throughput of densely deployed WLANs in different indoor propagation environments by conducting detailed MAC layer simulations using OPNET. The results show that the propagation conditions have a profound impact on achievable area throughput; as much as several tens of times increase in highly cluttered environments compared to open areas.
|
|
