1 / 15

Network Discovery and Selection/Re-selection

Network Discovery and Selection/Re-selection. OUTLINE. Network Model Use-case Scenario Solution IP Addressing. Network Model. ASN: Access Service Network A ASN contains BSs and ASN-GWs . NAP: Network Access Provider A NAP contains one or more ASNs. NSP: Network Service Provider.

ally
Download Presentation

Network Discovery and Selection/Re-selection

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. Network Discovery and Selection/Re-selection

  2. OUTLINE • Network Model • Use-case Scenario • Solution • IP Addressing

  3. Network Model • ASN: Access Service Network • A ASN contains BSs and ASN-GWs. • NAP: Network Access Provider • A NAP contains one or more ASNs. • NSP: Network Service Provider

  4. Network Model

  5. Deployment case • NAP Sharing • More than one NSPs shares the same NAP • NAP+NSP

  6. Use-case Scenario • 1.First-time use • 2.Initial network entry • 3.Network Re-entry • The same as handoff within the same WiMAX NAP • 4.MSS transitions across NAP coverage areas • Due to user movement or confounding factor, MSS elects to transition another NAP

  7. Solution • In a WiMAX network, a full network discovery and selection procedure includes four steps: 1.WiMAX NAP Discovery 2.NSP Access Discovery 3.NSP Enummeration and Selection 4.ASN Attachment based on NSP selection • Two WiMAX network selection modes are defined, automatic and manual.

  8. Solution (1) • WiMAX NAP Discovery • An SS/MS detects available NAPs by scanning and decoding DL-MAP of ASN on detected channel. • The most significant 24-bit value of “operator ID” within the “BS ID” parameter in the DL-MAP message is the NAP Identifier. • In NAP+NSP deployment case, NAP identifier shall be identical with NSP identifier. NAP discovery is based on the procedures defined in IEEE Std 802.16-2004 [x1]

  9. Solution (2) • NSP Access Discovery • The SS/MS shall sequentially perform association with each NAP for the purpose of discovering the supported NSPs • The ASN transmits the NSP ID list message no less than once every five seconds. • For SS/MS with configuration information that includes a list of NAP + NSP unitary mappings, WiMAX NAP Discovery of the NAP Identifier is sufficient to provide NAP and NSP.

  10. Solution (3) • NSP Enumeration and Selection • Manaul or Automatic mode • If displayed, NSPs from the list of available NSPs shall be presented in the following order: a) Home NSP b) NSPs in the "User Controlled NSP Identifier list" data file in the SS/MS c) NSPs in the "Operator Controlled NSP Identifier list" data file d) Any other NSP in random order • The signal quality shall not be used as a parameter for NSP Selection

  11. Solution (4) • ASN Attachment based on NSP selection • An SS/MS indicates its NSP selection by attaching to an ASN associated with the selected NSP, and by providing its identity and home NSP domain in form of NAI. • The ASN uses the NAI to determine the next AAA hop to where the MS’s AAA packets should be routed. NAI (Network Access Identifier) Example: • MS_1 uses a normal/root NAI (i.e., user-name@NSP_1.com) • MS_2 needs to construct a decorated NAI (e.g., NSP_4!user-name @NSP_1.com) • [RFC4282]

  12. Solution (5) • NSP Access Discovery(2) and NSP Enumeration(3) and Selection may well occur concurrent to WiMAX NAP Discovery(1). • There is no requirement that an SS/MS discover all NAPs and NSPs. • An SS/MS may stop the discovery process on discovery of a NAP and NSP meeting the SS/MS NSP Enumeration and Selection criteria and proceed to ASN Attachment.

  13. Configuration Information in SS/MSS • User/Operator controlled NAP Identifier list • Determining priority order of performing NSP Access Discovery procedure among if there are more than one available NAP. • User/Operator controlled NSP Identifier list • The lists are used to select a NSP. • NAP/NSP mapping list • Indicating the supported NSPs per NAP • NSP Count • Indicating whether the list of supported NSPs for a NAP is changed • Physical information: • Information useful in NAP Discovery including channel, center frequency, and PHY profile • Network deployment mode • Indicating the Network deployment mode of each NAP, i.e. NAP+NSP mode or NAP sharing mode.

  14. IP Addressing • The functional entity residing in ASN-GW is a DHCP relay. • Functional Decomposition for PoA from Visited NSP • Functional Decomposition for PoA from Home NSP

  15. IP configuration setup • The functional entity residing in ASN-GW is a DHCP relay. • Access authentication: • the network assigning the PoA address is determined.

More Related