Ubiquitous Personal Content Transfer in a Heterogeneous Wireless Network Environment
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Ubiquitous Personal Content Transfer in a Heterogeneous Wireless Network Environment






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Ubiquitous Personal Content Transfer in a Heterogeneous Wireless Network Environment Ubiquitous Personal Content Transfer in a Heterogeneous Wireless Network Environment Presentation Transcript

  • ABSTRACTUbiquitous personal content transfer in a heterogeneous environment includesboth global infrastructure based communications and localinfrastructure less transfer, which leads to a hybrid networkingenvironment. The MIP/NEMO standard can support ubiquitouscontent transfer, but is inefficient for local content transfer.Infrastructure less communication using ad hoc mode is often utilizedby individual users to transfer local content, but it can not supportdevice mobility. In this paper, a scheme based on a PDE is proposedto implement ubiquitous content transfer in a hybrid networkingenvironment. It can improve performance by combining the virtues ofMIP/NEMO and the advantages of ad hoc mode.It aims to accelerate commercialization of ubiquitous services withtargeted innovations aimed at removing the barriers to deployment andadoption . 1/24/2013 2
  • INTRODUCTIONWireless technologies continue to develop rapidly and have led to the widespread useof wireless communication systems. These systems are now enabling the delivery ofmultimedia experiences that provide rich content to individual users. Content is theinformation required by or related to an individual user. Lots of different types ofcontent are transferred with current wireless technologies, such as peer-to-peer filestreaming, audio/video-on-demand or online gaming. Users can employ content forwork, enjoy content for entertainment or share content for convenience. In the future, such ubiquitous and pervasive services could produceincreased revenue for service providers, telecommunication operators andtechnology manufacturers. The Virtual Centre of Excellence in Mobile & PersonalCommunications (Mobile VCE) , which aims to solve technical problems facing theindustry for the future wireless era, has started a project – Ubiquitous Service . 1/24/2013 3
  • TWO CHALLENGES FOR UBIQUITOUS COMMUNICATION The heterogeneous networking environment with differingnetwork coverage and access technologies. One individual user owns multiple personal devices, each ofwhich may have multiple wireless interfaces. They can connect toeach other with short-range technology. The coexistence ofinfrastructure-based and infrastructure-less communication leads to ahybrid networking environment 1/24/2013 4
  • HETEROGENEOUS ENVIRONMENTMULTIPLE WIRELESS NETWORKS Service Provider/Content Source Wi-Fi UMTS User Bluetooth Service Provider/ Content Source1/24/2013 5
  • A FRAMEWORK FOR A UBIQUITOUS COMMUNICATION SYSTEM Service Provider/ Content Source Wi-Fi UMTS The user moves with the WPAN User UserBluetooth Service Provider/WPAN WPAN Content Source 7
  • PERSONAL DISTRIBUTED ENVIRONMENT (PDE) Root PAA Root PCM Root DME Fixed Network Local PAA Local PAA Local PAA Local PCM Local PCM Local PCM Local DME Local DME Local DME Household Personal Area Office1/24/2013 8
  • ANALYSIS OF LOCAL DIRECT COMMUNICATIONLocal Direct Communication is analyzed with different approachesin two scenarios: Intra-WPAN Inter-WPANs. It is assume that every personal device in a WPAN is a VMN with multiple wireless interfaces.1/24/2013 9
  • SCENARIO A: INTRA-WPAN Intra-WPAN communicationwithout contacting remote entities(pure ad hoc mode), supporting IP backbonereceiver devices that move frominside to outside the WPAN (frompure ad hoc mode to global transfermode) Global content transfer Receiver device moves out of Pure Ad hoc WPAN content transfer WPAN WPAN 1/24/2013 10
  • STANDARD MIP/NEMO MODE IN SCENARIO A • Pure Ad-hoc mode: does not support mobility • MIP/NEMO mode with Routing Optimization (RO) : MNHA 4. Tunnelled by MNHA 3. Data Packets MRHA IP BackboneDrawbacks: 2. Tunnelled by MRHA dependencyHigh delay and cost 5. Tunnelled by MRHA BS/APMR connectivity MR 7. BU 6. Left tunnelled data packets 1. Data Packets 8. BACK CN MN NEMO-based WPAN 1/24/2013 11
  • SCENARIO B: INTER-WPAN’S • WPAN’s of two individual users communicate with each other directly, without contacting remote entities. Mobility is also required. Close physical proximity WPAN1 WPAN2 Local Area1/24/2013 12
  • STANDARD MIP/NEMO MODE IN SCENARIO B • Pure Ad-hoc mode: does not support mobility • MIP/NEMO mode with RO: MNHA 4. Tunnelled by MNHA 3. Data Packets MR1HA MR2HA IP Backbone 5. Tunnelled by MR2HA BS/AP BS/AP 2. Tunnelled by MR1 8. BU MR1 MR2 6. Left tunnelled data packets1. Data Packets 11. BACK 9. BU 7. BU 10. BACK 12. BACK CN 8. BACK MN closely located NEMO-based WPAN1 NEMO-based WPAN2 Local Area 13
  • SUMMARY OF EXISTING SCHEMES IN UBIQUITOUS COMMUNICATIONS Based on the above analysis, no existing scheme can fully satisfy the requirements of ubiquitous content transfer combining local direct and global mobile communications. Support “Home Agent Delay “Mobile Router Schemes “continuous dependency” and Cost connectivity” communication” not required not required with mobilityPure Ad hoc × √ low √Standard √ × high ×MIP/NEMOIntegration of √ × high ×MANET andMIP/NEMOMANEMO √ × high × 1/24/2013 14
  • PDE-BASED SCHEME FOR COMBINING LOCAL DIRECT AND GLOBAL MOBILE COMMUNICATIONS In this section, a PDE-based scheme is proposed for ubiquitous content transfer combining local direct and global mobile communications. Extended Functions of the DMEPersonal-device-based URI Personal-area-based URIHoA and multiple CoAs of The personal device wherethis personal device the Local DME works Extended URI mappings of the DME 1/24/2013 15
  • THE LOGICAL ARCHITECTURE OF THE DME The personal-device-based URI and personal-area-based URI also act aslogical interfaces. The local DME can send corresponding information of IPaddresses to communication entities that can also query the local DME using theseURIs. Personal Devices register DID and uMNP Equipment Mapping Table Location Register Security Register Register (in Root DME) Extended Mapping Table DME Personal-based Personal-device- URI (global and based URI local area) Communication HAs of MRs Entities (personal and non-personal devices), 1/24/2013 PCM and PAA 16
  • PDE-BASED SCHEMESSCENARIO A: INTRA-WPAN required content transfer PAAURI of the source and destination devices DME Extended Location request URI Mapping PCM Register using Table Interfaces URI and routing Multiple CoAs selection HoA Initiation Instructions (IBU and HoA) 1/24/2013 CN PDE-based Scheme process 17
  • PDE-BASED SCHEME IN SCENARIO ACN MR (Local PCM) MN 1. IBU 2. IBACK 3. Data Packet transferred in the local area MN moves 4. BU 5. BACK 6. Data Packet via MR and then IP backbone 18
  • SCENARIO B: INTER-WPANS CN MR1 (Local PCM1) MR2 (Local PCM2) MN 1. address request 2. address reply 3. ACK 4. IBU 5. IBACK 6. Data Packet via MR1 and MR2 in the local area MN moves 7. BU 8. BACK 9. Data Packet via MR1 and then IP backbone 19
  • PDE-based Scheme has a number of Advantages: Continuous Communications with Mobility HA independency Low delay and cost MR connectivity not required (Stand-alone mobile networks supported) Selection of transfer modes1/24/2013 20
  • PERFORMANCE ANALYSIS • Average Establishment delay (ted) and Cost (C): the average delay and cost for a CN to get the MN’s CoA so as to establish the transfer with Routing Optimization (RO).Wireless Wireless latency bandwidth Wired bandwidth Wired latency Average Establishment Delay t P / Bwl Lwl ( P / Bw Lw ) ( d x -y 1) m t (( Pk H k ) / Bwl Lwl (( Pk H k ) / Bw Lw ) ( d k 1)) k 1 Session length Session rate Establishment Cost Average n 1 λ S E ( S ) (t D t BU ) K K C n (( Pi H i ) di ) (( P j H j) d j) i 1 j K 1
  • PERFORMANCE ANALYSIS Parameter Settings PD 0~1500 bytes dMR-MRHA 6 PS 100 bytes dMRHA-MNHA 1 Bwl 2 Mbps dMR1-MR1HA 6 Bw 100 Mbps dMR1HA-MNHA 1 Lwl 2 ms dMNHA-MR2HA 1 Lw 0.5 ms dMR2HA-MR2 6 H 40 bytes dMR1HA-MR2HA 1 E(S) 20 dMR1HA-RP 1 λS 21/24/2013 22
  • PERFORMANCE ANALYSISSimulation result to show the performance improvement ofdelay and cost1/24/2013 23
  • SUGGESTIONS FOR FUTURE WORKThis work only considers the NEMOBS protocol that does not support MRs’ routingoptimization (RO). The RO support of NEMO is still under development by the IETFworking group. The proposed mechanisms based on NEMO could usefully beextended to support RO for MRs if an extended NEMO protocol is published by IETF.This proposes mechanisms to implement vertical handoff for WPANs aimed at keepingongoing ubiquitous communications continuous in a heterogeneous environment,but does not focus on this handoff’s duration time. This is because the major objectivewas to Practically implement such ubiquitous communications, which are seldomconsidered in other research, so the handoff duration was simply determined by theMIP/NEMO basic support protocols used in the proposed mechanisms. Future workshould include research aimed at reducing the handoff time to optimize the mechanisms 1/24/2013 24
  • CONCLUSIONThe work presented in this thesis has addressed the technical barriers to implementingubiquitous communications for individual users with their WPANs. An individual user shouldnot be considered as a single terminal but as a WPAN that moves accompanying this user.The major challenges are from the heterogeneous environment composed of not only multiplewireless networks but also dynamic changes of the WPAN. Ubiquitous communicationsrequire that content should be efficiently and continuously transferred to individual usersacross various wireless networks outside WPANs and via different personal devices insideWPANs, wherever users move. These have been addressed by a framework proposed in thisthesis, based on which two main issues were researched. We have proposed a PDE-based scheme combining the virtues of standardMIP/NEMO mode and the advantages of pure ad hoc mode. This not only can enable amobile user to achieve ubiquitous personal content transfer but also has a higher performancein such a hybrid networking environment 1/24/2013 25
  • REFERENCES[1]V. Devarapalli, R. Wakikawa, A. Petrescu and P. Thubert, "Network Mobility (NEMO)Basic Support Protocol," Internet Engineering Task Force, RFC 3963, Jan. 2005.[2] J. McNair and F. Zhu, "Vertical handoffs in fourth-generation multinetwork environ-ments," IEEE Wireless Commun. Mag., vol. 11, no. 3, pp. 8-15, Jun. 2004.[3] MobileVCE, Virtual Centre of Excellence in Mobile & Personal Communications,[4] IEEE Part 15.1: Wireless Medium Access Control (MAC) and Physical Layer (PHY)Specification for Wireless Personal Area Networks (WPANs), IEEE, 2002.[5] IEEE Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer(PHY) Specifications, IEEE, 1999. 1/24/2013 26