Design of Call Control and Authentication for UMTS

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Design of Call Control and Authentication for UMTS
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Student Lin-Yi Wu?????
Advisor Dr. Yi-Bing Lin?????????

Open Service Access
? OSA-based PoC Client
Authentication

? Analysis of AV Management
? One-Pass Authentication Procedure

UMTS and WLAN Interworking
? WLAN-based GPRS Support Node
? WLAN-based GPRS Support Node (WGSN)
One-Pass GPRS and IMS Authentication
?

• Feng, W.-S., Wu, L.-Y., Lin, Y.-B., and Chen,
  W.-E. WGSN WLAN-based GPRS Support Node with
  Push Mechanism. The Computer Journal, 47(4)
  405-417, 2004.
• Wu, L.-Y., Chang, M.-F., and Lin, Y.-B.
  Corrigendum WGSN WLAN-based GPRS Support Node
  with Push Mechanism. The Computer Journal, 47(5)
  624, 2004.
• Chang, M.-F., Wu, L.-Y., and Lin, Y.-B.
  Performance Evaluation of a Push Mechanism for
  WLAN and Mobile Network Integration. IEEE
  Transactions on Vehicular Technology, 55(1)
  380-383, 2006.

• Lin, Y.-B., Chang, M.-F., Hsu M.-T., and Wu,
  L.-Y. One-Pass GPRS and IMS Authentication
  Procedure for UMTS. IEEE Journal on Selected
  Areas in Communications, 23(6) 1233-1239, 2005.

The proposed procedure removes the redundant
steps in GPRS and IMS authentication.

At the IMS level, authentication is implicitly
performed in IMS registration procedure, and the
network traffic is saved up

to 50.
A solution for integrating UMTS and WLAN.

A loosely-coupled architecture that satisfies the
Scenario 3 features in the 3GPP TS 22.934

UMTS mechanisms are re-used for WLAN
authentication and access control without
modifying the existing UMTS components.
One-Pass Authentication Procedure
Performance Analysis of Authentication Vector
(AV) Management
?
?
Design of OSA-based PoC Client

• Wu, L.-Y., Tsai, M.-H., Lin, Y.-B., and Yang,
  J.-S. A Client-Side Design and Implementation for
  Push to Talk over Cellular Service. Accepted and
  to appear in Wireless Communications Mobile
  Computing Journal.

• Wu, L.-Y., and Lin, Y.-B. Authentication Vector
  Management for UMTS. submitted to IEEE
  transactions on Wireless Communications.

After the MS leaves one SGSN area, the SGSN
stores the unused AVs for a Reservation Timeout
(RT) period for the MSs next visit.

Open Service Access (OSA) provides an unified
service creation and execution environment which
is independent from the underlying mobile network.

A long RT period results in fewer accesses to the
HSS/AuC at the cost of extra AV storage in the
SGSN.

Push to Talk over Cellular (PoC) service provides
a
walkie-talkie like service in the cellular
communication infrastructure.
Timing Diagram of the AV Usage Mechanism