12 Usage of RADIUS on Pp interface

29.1613GPPInterworking between the Public Land Mobile Network (PLMN) supporting packet based services with Wireless Local Area Network (WLAN) access and Packet data Networks (PDN)TS

12.1 General

The Pp interface is defined in 3GPP TS 23.141 [18] and allows the PDG to report presence relevant events to the Presence Network Agent (such as tunnel establishment/removal, allocation of the remote IP address for the WLAN UE). The Pp interface is implemented by reusing mechanisms of RADIUS authentication and accounting via Wi interface as defined in clause 11.

12.2 Radius Profile for Pp interface

The RADIUS interface on Wi reference point as defined in Clause 11 is used for the Pp Reference Point as clarified in the Profile in this Clause.

Only the following messages are required for the Radius Profile for the Pp reference Point:

– Accounting-Request START

– Accounting-Response START

– Accounting-Request STOP

– Accounting-Response STOP

For the Radius Profile for the Pp Reference Point, only the mandatory Parameters within the Accounting-Request START and Accounting-Request STOP messages according to 3GPP TS 29.061 [4] Clauses 16.4.3 and 16.4.4, respectively, and the Parameter "Calling-Station-Id" need to be supported. The usage of other parameters is optional. They may be ignored by the Presence Network Agent.

12.3 Interconnecting the Presence Network Agent and the PDG

The Presence Network Agent may be directly attached to the PDG or via a Radius Proxy.

If the PDG needs to connect both to some AAA server via the Wi interface and a Presence Network Agent via the Pp interface for the same APN, but supports only a single RADIUS interface, the PDG can be directly attached to that AAA server. The Presence Network Agent can in turn be attached to that AAA server, which acts as a RADIUS proxy. If the AAA server is configured as a RADIUS Proxy between the Presence Network Agent and the PDG, the Radius Profile for the Pp Reference Point shall be applicable on the interface between the Presence Network Agent and the AAA server.

Annex A (informative):
Change history

Change history

Date

TSG #

TSG Doc.

CR

Rev

Subject/Comment

Old

New

2004-09

25

NP-040344

Approved by CN Plenary and placed under change control

2.0.1

6.0.0

2005-06

28

CP-050041

002

2

Pp Interface

6.0.0

6.1.0

2006-06

32

CP-060348

005

4

Depreciating authentication and authorization functions

6.1.0

6.2.0

2006-06

32

CP-060226

003

1

Introduction of I-WLAN Private Network Access

6.2.0

7.0.0

2006-06

32

CP-060225

004

1

Usage of Diameter over the Wi interface

6.2.0

7.0.0

2006-12

34

CP-060628

006

2

Authentication, Authorization, and Accounting message flows for Diameter Wi interface

7.0.0

7.1.0

2006-12

34

CP-060622

008

1

Correcting a reference to TS 29.061 in TS 29.161

7.0.0

7.1.0

2007-03

35

CP-070093

009

1

Update reference

7.1.0

7.2.0

2008-12

42

Upgraded to v8.0.0 due to simple upgrade without no technical change

7.2.0

8.0.0

2009-12

46

Automatic upgrade from previous Release

8.0.0

9.0.0

2011-03

51

Automatic upgrade from previous Release version 9.0.0

9.0.0

10.0.0

2011-03

51

Correction of heading and numbering made by MCC

10.0.0

10.0.1

2012-09

57

Automatic upgrade from previous Release version 10.0.1

10.0.1

11.0.0

2014-10

Automatic upgrade from previous Release

11.0.0

12.0.0