Policy and Mobility MOBOPTS RG, IETF #67, San Diego, Ca Jouni Korhonen Rajeev Koodli, Vijay Devarapalli, Gerardo Giaretta

Motivation Work has been on enabling fast handovers at L3 and extensions to access control protocols to enable fast handovers One aspect that has not been considered so far are the policies that a user is subjected to when accessing a subscribed network. These policies, defined by the network operator, may have a significant impact on the user's mobility experience

Motivation cont’d The policies configured on a network may govern: –what kind of service the user is allowed –which access network the user is allowed to attach to –enforce a particular quality of something (QoS) –restrict the user to certain mobility protocols

Background In the last there was a presentation about policies and mobility in general –”Policies and how they affect IP Mobility” An action point was given: –”To document the problems encountered in applying IP mobility due to policy constraints…”

What Happened Since IETF #66 A new I-D is actually under the process –”IP Mobility and Policy Control” –Missed the -00 deadline though.. ;^)

Next steps The main purpose of the tbd I-D is to describe the problems encountered when applying IP Mobility protocols to networks where operator defined policies and the resulting constraints exist This could be useful to protocol designers who can make better choices when designing IP Mobility protocols and to network designers who develop the policy architecture and configure the policies.

Topics to be covered.. Brief intro to ’current’ IP Policies in operator controlled environment –General taxonomy –Firewalling & access restrictions –Case study: 3GPP Policy & Charging Control (PCC) architecture (as it seems to have gained some momentum recently...) Identified issues in integrating IP Mobility and policies

Locigal PCC Architecture (roaming) Visited Domain Home Domain | | | | | | Proxy | | OCS | | | | OCS | | | | | | | | | | | | | | | AF | | | | | | | | | | | | | | | | | | | | | V-PCRF | | H-PCRF |--| SPR | | | | | | | | | | | | | | | | | | | V-PCEF & GW | | | | | | | | | | | | | | | | | | | OFCS |------| BSyst | | BSyst | | | | | | | | | | PCC is not only about access policies Involves different charging systems... Policy databases Selected applications affect policies Access technology agnostic

Questions & comments?