1 / 23

Sideseadmed (IRT0040) loeng 4/2010

Sideseadmed (IRT0040) loeng 4/2010. Avo avots@lr.ttu.ee. Access technologies. PAN / CAN: Bluedooth, Zigbee, IrDA LAN: WLAN (WiFi) ‏ MAN: WiMAX, Flash-OFDM (Flarion) ‏ WAN: 3G (UMTS, HSPA) ‏ GAN: Satellite (InmarsatBGAN) ‏. General Problems (1). Network detection NIC needs to be active

jamel
Download Presentation

Sideseadmed (IRT0040) loeng 4/2010

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Sideseadmed (IRT0040)loeng 4/2010 Avoavots@lr.ttu.ee

  2. Access technologies • PAN / CAN: Bluedooth, Zigbee, IrDA • LAN: WLAN (WiFi)‏ • MAN: WiMAX, Flash-OFDM (Flarion)‏ • WAN: 3G (UMTS, HSPA)‏ • GAN: Satellite (InmarsatBGAN)‏

  3. General Problems (1) Network detection • NIC needs to be active • Example #1: WiFineeds to be active • How to detect an alternative network while a connection is active?Depends on technology

  4. General Problems (2) Network subscription • Networks needs to be preconfigured • WiFi: al lot of different authentication methods, access data for each network (Key, Password, Certificate)‏ • 3G: SIM card (Multi-SIM solutions)‏ • Usually, contract with provider(s) required • Quality evaluation of connected and unconnected networks

  5. General Problems (3) Seamless handover? • Fast intra-technology or inter-technology handover • “Make-before-Break”scenarios • Mobility solution (e.g. MIPv4/v6, SIP etc.)‏

  6. Break-before-Make

  7. Make-before-Break

  8. Standards

  9. Quality Evaluation Depends on many factors • Signal strength and noise level 􀃆SNR, related to channel coding • Radio propagation and channel multiplexing • Moving speed • Network interferences (e.g. different WiFinetworks on the same channel)‏ • Collisions (e.g. in WiFi􀃆“hidden node problem”)‏ • Network load

  10. FLASH-OFDM Fast low-latency access with seamless handoff orthogonal frequency division multiplexing F-OFDM, is a system that is based on OFDM and specifies also higher protocol layers

  11. @450 network on 1 April 2007 Digita’s @450 service delivers wireless broadband right where it is needed. @450 is the only broadband solution that you can take with you wherever you go. @450 utilises the NMT network frequency range released from mobile phone use.

  12. IEEE 802.21 • == 802.21 is an IEEE emerging standard. The standard supports algorithms enabling seamless handover between networks of the same type as well as handover between different network types also called Media independent handover (MIH) or vertical handover. The standard provides information to allow handing over to and from cellular, GSM, GPRS, WiFi, Bluetooth, 802.11 and 802.16 networks through different handover mechanisms

  13. “Clean slate approach” • Redesigning the Internet in “Clean slate approach” has attractedconsiderable attention. In clean slate approach, several network architectures are proposed, which are not based on the layered model.

  14. Cross-layer collaboration Layered model with cross-layer collaboration and split of the data plane and the control plane

  15. Cross-layer collaboration (1) introducing the layer-5 to provide the applications with more abstract communication paths, (2) Introducing cross-layer collaboration for efficient processing in each layer, (3) splitting the node identifier and the node locator for mobility, multihoming and security, (4) splitting the data plane and the control plane for manageability (5) introducing a recursive layered model to support network virtualization

  16. Media Independent Handover (MIH) is a standard being developed by IEEE 802.21 to enable the handover of IP sessions from one layer 2 access technology to another, to achieve mobility of end user devices.

  17. Service Access Points

  18. StrokeNet

  19. IEEE 802.22 IEEE 802.22 is a standard for Wireless Regional Area Network (WRAN) using white spaces in the TV frequency spectrum.

  20. Higher Layer Higher Layer Higher Layer Transport Transport Transport Higher Layer Transport Information Repository March 2009 Existing: 802.21 Handover Services MIH MIH MIH Higher Layer Higher Layer Users Users Users Transport Transport MIH Function MIH Function MIH Function 3GPP / 3GPP2 3GPP/ DATA DATA MGMT MGMT Network 3GPP2 Interface 802 Interface 802 Interface 802 Network Multi RAT Mobile Node Legend MIH Local Interface MIH Message Transport Slide 20 Zuniga/Kwak, InterDigital

  21. MIC Function (i.e. Spectrum Mgr) Higher Layer Higher Layer Higher Layer Transport Transport Transport Higher Layer Transport Information Repository March 2009 Proposed: 802.21 MI Coexistence Services MIC MIC MIC Higher Layer Users Users Users Transport MIC Function MIC Function (i.e. Spectrum Mgr) non-802Interface DATA DATA MGMT MGMT non-802Network 802 Interface 802 Interface 802 Network Multi RAT Mobile Node Could be colocated into single network server Legend MIC Local Interface MIC Message Transport Slide 21 Zuniga/Kwak, InterDigital

  22. Lingid http://www.450laajakaista.fi/karttapalvelu/ http://en.wikipedia.org/wiki/Flash-OFDM#Flash-OFDM http://en.wikipedia.org/wiki/802.21 http://en.wikipedia.org/wiki/Media-independent_handover

  23. Lingid http://www.ieee802.org/21/ http://www.icoin.org http://www.ieee802.org/22/

More Related