Paging Extension to Hierarchical Mobile IPv6

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Paging Extension to Hierarchical Mobile IPv6

• Behcet Sarikaya
• University of Aizu
• email sarikaya_at_u-aizu.ac.jp

Presentation of draft-sarikaya-mobileip-hmipv6rp-0
0.txt 15 December 2000
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MIPv6 Regional Paging

• Extends draft-ietf-mobileip-ipv6-13.txt
• Extends draft-ietf-mobileip-hmipv6-01.txt (basic
  mode)
• An extension that lets MN go to power saving idle
  mode and lets the visited domain to reduce
  routing state information.
• In line with including handover and
  registrations known as Layer 2 functionalities
  into mobile IPv6 gt Paging which is also a Layer
  2 functionality can be done in Layer 3 using our
  extension.

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ARCHITECTURE

• Highest level MAP is called Paging MAP
• Routers below PMAP can optionally be organized in
  paging areas. At least one paging area is
  required
• Access Routers advertise the paging area ID.

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Going to Idle Mode

• MN does idle mode registration, i.e. sends BU
  with idle mode request to PMAP.
• BAck contains Paging Multicast Address

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Idle Mode Registration Request/Reply
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Paging
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Multicast Addresses

• IPv6 Multicast Addresses
• T 0 permanent T1 transient
• Paging area multicast address has the form
  FF0EPaging Area ID such as FF0E3FFE501
• Solicited-node multicast address
• for the care-of address 3FFE5014271000A38F6
  36F
• SNMA is FF0200001FF8F636F

8 4 4 112
11111111 000T Scop Group ID
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Entering Active Mode
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Paging Request/Paging Router Advertisement
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Time Slot Based Paging

• If there is Layer 2 paging support, Agent
  Advertisements with paging could be mapped to the
  messages sent on the paging channel.
• Otherwise, e.g. in wireless LANs, access routers
  can periodically transmit unsolicited multicast
  router advertisements on a time slot basis whose
  slot length, advertisement interval and slot
  sequence number (one of the 4 slots assigned to
  MN) are advertised in solicited/ unsolicited
  router advertisements or RAs sent by the access
  router

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Time Slot Based Paging

• Requires RAs sent periodically, and a sequence
  number with each RA in order to synchronize MN
  receiver

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CONCLUSIONS

• It is a layer 3 paging method, does not require
  layer 2 support
• Idle mode registration
• Time slot based paging
• IPv6 multicasting is used to page MN
• Can be made to work on top of regreg6 as well
• A prototype implementation on Linux is being
  developed