MASTER THESIS PROPOSITION AT TELECOM SUDPARIS EVRY FRANCE
Energy Saving Solutions for Integrated Fix-Mobile Access Network
Proposed by Prof. Tülin ATMACA E-mail: tulin.atmaca@telecom-sudparis.eu
Dept. RST
For the future of our planet, usage of the natural resources is getting greater interest. For this purpose, research groups in academy and industry work on to develop less energy consuming solutions. In that case, communication networks are one of the major slices of the global energy consumption. Access networks consume more energy among all other communication network types and increasing internet usage of end-users raises the importance of access network solutions.
According to the study in [1], Ethernet Passive Optical Networks (EPON) systems around the world consumes 2.37TWh energy annually, which is approximately equals to 300.000 house energy necessity. In 2009, power conservation recommendations for GPON and XG-PON standardization are released to cover sort of energy conservation methods in PON systems. In 2012, a novel approach Bit-Interleaving PON (Bi-PON) released by GreenTouch consortium.
GreenTouch is founded by a group of network companies and academic institutes to accomplish the purpose that ICT energy consumption in 2010 will be decreased factor of 1000 in 2015. Bi-PON aims to reduce the power consumption on end user devices (Optical network Unit - ONU).
The integration of optical and wireless networks is a good alternative for access networks, because of their complementary characteristics of high bandwidth capacity of the optical fibers and the mobility of wireless technology [2]. In figure 1, an integrated optical-wireless access architecture is presented. OLT is responsible for IP backbone connection where ONUs of classical PON network are replaced by new integrated unities. The integrated ONUs are composed by the convergence of the functional entities of a Wireless Base Station (BS) and an EPON ONU into a single unit, named as Optical–Wireless Access Unit (OWAU). The OWAU has Ethernet ports for wired connections and radios for wireless connections. The OWAUs are connected to the OLT through a passive splitter. Ethernet Service Subscribers
(eSS) are the original EPON subscribers, while the Wireless Service Subscribers (wSS) are the original considered wireless technology subscribers Traffic between the OLT and the OWAU corresponds to data frames which are encapsulated in Ethernet Packet Data Units (PDUs); within the OWAU, data frames are encapsulated either as Ethernet or, according to the wireless technology used, in this corresponding PDUs (e.g. WiMAX, LTE).
Fig. 1. Architecture Model for integrated Fix-Mobile network
In this research, we aim to develop new protocol agreement pane for controlling energy saving all over the access network under different classes of services considering QoS requirements for each class. Besides, it must include a good bandwidth allocation algorithm to maintain high bandwidth utilization. Some equipment in the access architecture can switch to sleep mode while the bandwidth demand is handled by other network equipment. A control and routing algorithm is going to be developed for convergence of wireless (LTE, WiFi, WiMax) and Fix (PON , Ethernet ) networks in order to reduce energy consumption on Wireless Mesh or Vehicular (Ad-Hoc) mobile networks. Furthermore, smart grids are also a promising technology for future user demands. However, the underlying access solutions as PON or WiFi need further development to succeed smart grid implementation necessities
such as energy efficiency, security, confidentiality, etc. Results of this research are also can be a solution for smart grid requirements.
The research should be followed in several steps:
State of Art on integrated Fix-Mobile access solutions
Propose an algorithm which offers to save energy and consider QoS requirements in the given architecture
Simulate the algorithm for performance evaluation on a Network simulation tool (Omnet++, Ns3, ... )
REFERENCES
1. Nishihara, S.; Hajduczenia, M.; Mukai, H.; Elbakoury, H.; Hirth, R.; Kimura, M.; Kato, M., "Power-saving methods with guaranteed service interoperability in Ethernet passive optical networks," Communications Magazine, IEEE , vol.50, no.9, pp.110,117, September 2012.
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http://www.itu.int/rec/T-REC-G.Sup45-200905-I/en.
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