3GPP2/TSG-A Contribution
TSG-A
TITLE:
HRPD Support for Auxiliary Connections (SO64) and IP Flows without PPP
Encapsulation and HDLC-like framing for HRPD IOS.
SOURCE:
Shahab Sayeedi Shahab.Sayeedi@motorola.com
+1-847-632-3877
ABSTRACT:
This contribution proposes SO64 support for HRPD Auxiliary connections and support for
IP flows with no PPP Encapsulation and HDLC-like framing for the HRPD IOS
specifications.
RECOMMENDATION:
Review, discuss, and accept the proposals in this contribution for the HRPD IOS.
Motorola Inc. grants a free, irrevocable license to 3GPP2 and its Organizational Partners to incorporate text or other copyrightable
material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in
Organizational Partner's name any Organizational Partner's standards publication even though it may include all or portions of this
contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution
or the resulting Organizational Partner's standards publication. Motorola Inc. is also willing to grant licenses under such contributor
copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing an Organizational
Partner’s standard which incorporates this contribution.
This document has been prepared by Motorola Inc. to assist the development of specifications by 3GPP2. It is proposed to the
Committee as a basis for discussion and is not to be construed as a binding proposal on Motorola Inc.. Motorola Inc. specifically
reserves the right to amend or modify the material contained herein and nothing herein shall be construed as conferring or offering
licenses or rights with respect to any intellectual property of Motorola Inc. other than provided in the copyright statement above.
3GPP2/TSG-A Contribution
Revision History
DATE CHANGES REFERENCE
03/30/05 Original A30-20050330-00x_MOT_HRPD_VoIP
Motorola Inc 2
3GPP2/TSG-A Contribution
1 DISCUSSION
2
3 In contribution A40-20050314-031 LU SO67 revised.pdf, Lucent proposes SO64 support
4 for auxiliary HRPD connections. Motorola agrees that SO64 should be supported for the
5 HRPD multi-flow packet application feature and recommends it be supported for the
6 A.S0008-A and A.S0009-0 releases to differentiate auxiliary connections from the main
7 connection at the PDSN.
8
9 Lucent’s contribution also proposes support for SO67 which is defined as HRPD
10 Auxiliary connection with no PPP Encapsulation and no HDLC-like Framing in the
11 contribution. The contribution references TSG-C liaison A00-20050214-006 TSG-
12 C_corr_re_non-PPP_HRPD_Flows.pdf which states:
13
14 To support SO XX, the PDSN needs to have the capability to send IP packets to the AN without
15 encapsulating the packets in PPP, and without applying octet-based HDLC-like framing.
16
17 Motorola agrees that removal of the PPP header with no HDLC-like framing could
18 enhance HRPD VOIP support, however, we don’t agree that PPP header removal should
19 occur in the AN. Please note that TSG-C’s liaison places this requirement on the PDSN,
20 not the AN. We also don’t agree that the RAN should be required to support ROHC
21 compression. We propose the following changes as a basis for moving forward.
22
C.S0024-A-1 A8 A10
AT AN PCF PDSN
PPP
Main
GRE GRE GRE GRE SO59
PPP PPP+IP PPP+IP PPP
IP packet packet packet IP packet
No PPP header
applied by PDSN
PPP SO68 (Mandatory):
PPP header free
with compression
GRE GRE GRE GRE performed at PDSN
VoIP packet VoIP packet VoIP packet VoIP packet
SO67 (Optional)
PPP header free
RoHC (Mandatory) with compression
performed at AN
RoHC (Optional)
after negotiation with
PDSN.
23
24
25 Adding and removing PPP headers is inefficient. Therefore the header should not be
26 added in the first place by the PDSN This requirement should not impact the HRPD AN.
27
28 The PDSN currently supports ROHC compression as specified in X.S0011-C. We
29 recommend that compression be made mandatory at the PDSN for HRPD VoIP support
30 to support IOS interoperability. We recommend compression optionally be supported in
Motorola Inc 3
3GPP2/TSG-A Contribution
1 the AN. Additional A11 signaling will be needed to negotiate this capability between the
2 PDSN and AN.
3
4 TSG-X has deferred PPP header free/no-HLDC framing support to an X.S0011-D point
5 release pending a decision in TSG-A on how it should be supported. Motorola
6 recommends adding HRPD IOS support for PPP header-free operation without HDLC-
7 like framing to the A.S0008-A and A.S0009 Rev A releases with compression mandatory
8 at the PDSN (SO68). There will be minimal impact to the IOS to support this.
9
10 Motorola supports optional compression in the AN (SO67) if standardization can be
11 completed by the April 3GPP2/TSG-A meeting. If standardization cannot be agreed to or
12 completed by then, support for (SO67) should be deferred to the next HRPD IOS release.
13 Baselining of A.S0008-A and A.S0009 should not be delayed beyond the April TSG-A
14 meeting.
15
Motorola Inc 4