Paging Extension to

Hierarchical Mobile IPv6

Behcet Sarikaya

University of Aizu

email: sarikaya@u-aizu.ac.jp Presentation of

draft-sarikaya-mobileip-hmipv6rp-00.txt

15 December 2000

© Behcet Sarikaya 2

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 => Paging which is also a Layer 2 functionality can be done in Layer 3 using our extension.

© Behcet Sarikaya 3

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.

A R p re v A R n ew

M NM Nha ndoff

P a g ingM obilityA nchor P o in t (P M A P )

P A 1

P A 2

P A n

© Behcet Sarikaya 4

Going to Idle Mode

• MN does idle mode registration, i.e. sends BU with idle mode request to PMAP.

• BAck contains Paging Multicast Address A R p re v A R n ew

M N

P M A P

P A 1

P A 2

P A n

B U re q (im )

B U re q (im )

B A re p ly (im )

B A re p ly (im )

M N -> P A 1

R 1 R i R k

© Behcet Sarikaya 5

Idle Mode Registration Request/Reply

© Behcet Sarikaya 6

Paging

A R i

M N

P M A P

P A 1

R 1

In ternet

C N

R A p to S N M A (reg iona l ca re-o f a dd ress) P a g ing M u ltica st a dd ress

P req

P reqto M A (P A 1)

© Behcet Sarikaya 7

Multicast Addresses

• IPv6 Multicast Addresses– T = 0 permanent; T=1 transient

• Paging area multicast address has the form: FF0E::Paging Area ID such as FF0E::3FFE:501

• Solicited-node multicast address– for the care-of address

3FFE:501:427:1000::A38F:636F

– SNMA is FF02:0:0:0:0:1:FF8F:636F

8 4 4 112

11111111 000T Scop Group ID

© Behcet Sarikaya 8

Entering Active Mode

A R i

M N

P M A P

P A 1

R 1

In ternet

C N

R A p to S N M A (reg iona l ca re-o f a dd ress) P a g ing M u ltica st a dd ress

P req

P reqto M A (P A 1)

B U

B U

D T

© Behcet Sarikaya 9

Paging Request/Paging Router Advertisement

© Behcet Sarikaya 10

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

© Behcet Sarikaya 11

Time Slot Based Paging

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

R o u terA d v ertisem en t

P a g in g A g en tA d v ertisem en tR A p

P a g in g slo t o ffse t (1 0 0 m s)

P a g in g slo t in terv a l (4 )

P a g in gS lo tIn d ex (2 )

© Behcet Sarikaya 12

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