View
292
Download
4
Category
Tags:
Preview:
Citation preview
A Survey of Available Features for Mobile Traffic Offload
Younes Khadraoui (Telecom Bretagne/IRISA)Xavier Lagrange (Telecom Bretagne/IRISA)Annie Gravey (Telecom Bretagne/IRISA)
2Outline Introduction and Motivations
Offloading through femtocells
Offloading through Wi-Fi Loose coupling Tight coupling Very tight coupling
Conclusion
3Introduction and Motivations(1) New cellular access technologies: (High Speed Packet Access (HSPA), Long Term Evolution (LTE));
High bit rates New services (streaming video, Voice over IP,etc);
Encourage the use of smartphones to access the internet;
Significant Increase of mobile data traffic !!!
4Introduction and Motivations (2)
[1] Ericsson, Mobility report, tech. rep., 2013.a
5Introduction and Motivations(3)
Deploy new base stations (BS) increase inter-cell interference high CAPEX and OPEX
Alternative solution:Transfer a part of the traffic to other cheaper networks: OffloadingTwo main offloading solutions: Femtocells (Home eNodeB) Wi-Fi networks
50% of global mobile data traffic will be offloaded to femtocells or Wi-Fi networks by 2018 (17 exabytes/month); [2]
CAPEX=capital expenditureOPEX=operational expenditure
[2]: [2] C. V. N. Index, Global mobile data traffic forecast update, 2013-2018, US/solutions/collateral/ns341/ns525/ns537/ns705/ns827/white paper c11- 520862. html (Son erisim: 5 Febs 2014), 2013.
6Offloading through femtocells Femtocells:
Benefits: OPEX reduced from $60,000/year/macrocell to $200/year/femtocell [6]; Handover provided seamlessly ;Disadvantages: Interferences with macro BS;
Few meters coverageSame frequency band as macro-BSSeen as a regular BS
[6]:V. Chandrasekhar, J. Andrews, and A. Gatherer, Femtocell networks: a survey, Communications Magazine, IEEE, vol. 46, no. 9,pp. 5967, 2008.
7Offloading through Wi-Fi Different types of architecture for integration of Wi-Fi and cellular network:
Loose coupling;
Tight coupling;
Very tight coupling;
8Loose coupling(1)
2 IP addresses
2 protocol stacks
TCP connectionsloss in case of vertical handover
TCP=Transport Control Protocol
9Loose coupling(2)Solutions for sessions continuity Mobile IPv6 (MIPv6) based solution (Ip Flow Mobility (IFOM))
10
Loose coupling(3)Solutions for sessions continuity SHIM6 based solution [16]
[16] A. Dhraief, Mobility and multihoming convergence. PhD thesis, (Institut Mines-Tlcom-Tlcom Bretagne-UEB), 2009.
11
Loose coupling(4)Solutions for sessions continuity Stream Transport Control Protocol (SCTP) based solution[17]
[17] R. Stewart, Q. Xie, et al., Rfc 4960, stream control transmissionprotocol, ietf, Network Working Group (October 2000), 2007.
12
Loose coupling(5)Solutions for sessions continuity Multipath TCP (MPTCP) based solution [22]
[22] A. Ford, C. Raiciu, M. Handley, and O. Bonaventure, Tcp extensions for multipath operation with multiple addresses,IETF MPTCP proposal-http://tools. ietf. org/id/draft-ford-mptcpmultiaddressed- 03. txt, 2011.
13
Tight coupling Tight coupling:
1 IP address
Seamlessverticalhandover
14
Very tight couplingVery Tight coupling[9]:
[9] X. Lagrange, Very tight coupling between lte and wifi for advanced offloading procedures, in WCNC Workshop, Interference and design issues for futur heterogeneous networks, IEEE, 2014.
15
Conclusion Increase of mobile data traffic on cellular networks need for solutions;
Alleviate traffic load on cellular network by offloading to other cheaper network;
Main offloading solutions: Femtocells and Wi-Fi;
Different degrees of coupling Wi-Fi and cellular: Loose coupling Tight coupling Very tight coupling
Session continuity issues
16
Thank you for your attention ! Questions ?
Younes.khadraoui@telecom-bretagne.eu
Xavier.lagrange@telecom-bretagne.eu
Annie.gravey@telecom-bretagne.eu
Thank you!
Diapo 1Diapo 2Diapo 3Diapo 4Diapo 5Diapo 6Diapo 7Diapo 8Diapo 9Diapo 10Diapo 11Diapo 12Diapo 13Diapo 14Diapo 15Diapo 16
Recommended