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CDMA & GSM Roaming TIA/3GPP2 Standards Status. Jennie Cung February 26, 2002. CDMA / GSM Roaming Standards Status. PN-4925 TIA/EIA-41D Network Enhancement to support One-Way Roaming to GSM Ballot resolution comment approve to explicitly indicate that IIF will use TR45-AHAG ESA

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cdma gsm roaming tia 3gpp2 standards status

CDMA & GSM Roaming TIA/3GPP2 Standards Status

Jennie Cung

February 26, 2002

THC

cdma gsm roaming standards status
CDMA / GSM RoamingStandards Status
  • PN-4925 TIA/EIA-41D Network Enhancement to support One-Way Roaming to GSM
    • Ballot resolution comment approve to explicitly indicate that IIF will use TR45-AHAG ESA
  • PN-4926 IIF Enhancements to support CDMA/GSM Two-Way Roaming
    • Modify volume 2 of PN-3-4857 (to be published as J-STD-038 Rev.A)
    • GSM subscribers SIM will contain both GSM and CDMA Authentication algorithms, e.g. A3/A8 and CAVE, respectively
  • PN-4927 IIF Enhancements to support One-Way Roaming to GSM

All in TIA/3GPP2 Ballot Resolution Process

THC

cdma to gsm one way roaming

Home Sends SSD to Apparent Serve

v

Mobile Attempts Register

u

GSMMSC/VLR

IS-41MSC

x

w

A GSM sends normal GSM auth Message to mobile with RAND

A GSM Authentication Message contains 3 large parameters. RAND, SRES and KC.

GSM

To

IS-41

Inter-working

Function

CDMA to GSM One-Way Roaming
  • IIF computes the authentication triplet via TR45-AHAG defined ESA

An IS-41 Subscriber in GSM Market with a GSM mobile phone*

*The phone could be a pure GSM phone, multimode phone or SIM phone

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cdma to gsm one way roaming via cave devised by kddi
Authentication GSM

RAND (128 bits)

-random number used by the mobile in it’s challenge response.

SRES (32 bits)

-response a mobileshould provide to the challenge

Kc (64 bits)

-the mask that themobile will calculatefrom RAND to usefor voice privacy

Authentication IS-41

RANDU (24 bits)

-random number used by the mobile in it’s challenge response.

AUTHU (18 bits)

-response a mobileshould provide to the challenge

SSD-B (64 bits)

-the mask that themobile will calculatefrom RANDU to usefor voice privacy

Can be placed in RAND parameter field

GSM

To

IS-41

Inter-working

Function

Can be placed in Kc parameter field

CDMA to GSM One-Way Roaming (via CAVE – devised by KDDI)

v

w

A GSM Authentication Message contains 3 large parameters. RAND, SRES and KC.

The IIF populates those fields with ANSI-41 RANDU, AUTHU, and SSD-B

THC

contact information

Contact Information

www.schlumberger.com

Jennie Cung

Director, Business & Technology Development

8311 North FM 620 Rd

Austin, TX 78726

Office: +1.512.257.3983

E-mail: tcung@slb.com

THC