Transcript UL LFDMA with hopping

TSG-X WG5
TITLE:
HRPD-WiMAX Handoff
SOURCE: Samsung : Bill Semper and BeomSik Bae
[email protected], [email protected]
ABSTRACT: This contribution proposes the HRPD-WiMAX handoff solution.
DATE: November 5, 2007
RECOMMENDATION: Review and Adopt
Notice
Samsung Electronics grant 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. Samsung Electronics are 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 Samsung Electronics 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 Samsung Electronics . Samsung
Electronics specifically reserves the right to amend or modify the material contained herein and to any intellectual property of
Samsung Electronics other than provided in the copyright statement above.
Principles
• Single radio operation
– Dual radio operation should be supported, but is not mentioned in this
material.
• Support bi-directional handoff
• Support for active handoff for real-time service (such as VoIP)
– To maximize handoff performance, session setup (e.g. HRPD session,
PPP setup, and CMIP/PMIP binding update) should occur before
handoff commences
• HRPD-WiMAX handoff solution may impact existing infrastructure
as little as possible
– Minimum change of legacy HRPD networks.
– IOS signaling interfaces should be used as much as possible
• Minimal impact on terminal complexity
1
Overview
• AT performs pre-registration/pre-setup with target RAN
node (HRPD AN or WiMAX BS).
• IP-level tunneling method is used for pre-registration/presetup.
– WiMAX->HRPD: AT communicates with HRPD AN over IP-level
tunnel through WiMAX network without service interruption.
•
•
•
•
•
•
HRPD session negotiation
Device authentication
Set up of PPP session
User authentication
TFT configuration
MIP registration
– HRPD->WiMAX: AT communicates with WiMAX BS over IPlevel tunnel through HRPD network without service interruption.
IP-level tunneling can be considered as just another IP
applications in HRPD network.
Handoff Architecture
• Basic architecture
AAA
HA/LMA
ASN-GW
PDSN
IP
IP
connectivity
connectivity
A10/A11
PCF
(SC/MM)
A8/A9/A14/A20
WiMAX
BS
AN
HRPD
AT
Note: HRPD architecture is based on A.S0009
IP-level Tunneling Example (HRPD to WiMAX)
AAA
HA/LMA
ASN-GW
PDSN
IP
connectivity
A10/A11
PCF
(SC/MM)
A8/A9/A14/A20
WiMAX
BS
AN
AT
HRPD
L3 tunnel from AT to WiMAX BS
IP-level Tunneling Example (WiMAX to HRPD)
AAA
HA/LMA
ASN-GW
PDSN
IP
connectivity
A10/A11
PCF
(SC/MM)
A8/A9/A14/A20
WiMAX
BS
AN
L3 tunnel from AT to HRPD AN
AT
HRPD
Protocol Stack
• WiMAX to HRPD
PPP
SNP
SLP
PPP
SNP
SLP
RLP
DO
Signaling
Layers
RLP
DO
Signaling
Layers
Tunneling
Protocol
• HRPD to WiMAX
PHY
PHY
TCP/UDP
IP
AT
A10/A11
Tunneling
Protocol
TCP/UDP
CS
WiMAX
MAC
WiMAX
PHY
A10/A11
CS
WiMAX
MAC
WiMAX
PHY
IP
IP
IP
R6
R6
LLC
LLC
PHY
PHY
PHY
PHY
WiMAX
BS
WiMAX
ASN-GW
HRPD
PDSN
HRPD AN/PCF
R6
WiMAX
MAC
WiMAX
MAC
Tunneling
Protocol
Tunneling
Protocol
TCP/UDP
IP
PPP
PPP
RLP
MS
TCP/UDP
IP
IP
IP
LLC
LLC
PHY
PHY
RLP
DO MAC/
Signaling
Layers
DO MAC/
Signaling
Layers
DO PHY
DO PHY
A10
A10
PHY
PHY
AN/PCF
PDSN
Note: IPsec can be used to provide secure IP-level tunnel.
WiMAX BS
PHY
Basic Call Flow: WiMAX to HRPD [1]
AT
HRPD
WiMAX
BS
WiMAX
ASN-GW
AN
1. Service over WiMAX
2. HRPD pilot detect
Handoff trigger
3. Target AN discovery (e.g DNS lookup)
4. AT Authentication and IPSec establishment (if needed)
IP Tunnel
5. HRPD session negotiation and device authentication
6. PPP establishment and user authentication
7. TFT configure, MIP Registration (FFS)
8. HO Decision
IP Tunnel
9. Traffic Channel Assignment
10. HO Indication
11. HRPD Air access
12. Service over HRPD
PCF
PDSN
Basic Call Flow : WiMAX to HRPD [2]
• Step 1: AT is in active state in WiMAX network
• Step 2: AT reaches the edge of WiMAX network and detects HRPD
pilot
• Step 3: AT performs target HRPD AN discovery
• Step 4: If needed, AT and target HRPD AN can establish IPsec
tunnel.
• Step 5/6/7: AT and target HRPD network configure HRPD session,
establish PPP session, perform device/user authentication, and
configure TFTs like legacy HRPD setup
• Step 8/9: If handoff is decided, the target AN sends Traffic Channel
Assignment message to AT through IP tunnel
– We can consider other implementation architecture with lite AN. With
that architecture, this may be different.
• Step 10/11: AT tunes from WiMAX carrier to HRPD carrier and
accesses to HRPD.
• Step 12: After completing the air interface establishment, the service
for AT is continued.
Basic Call Flow: HRPD to WiMAX [1]
AT
HRPD
AN
WiMAX
PCF
PDSN
ASN-GW
1. Service over HRPD
2. WiMAX detected
Handoff trigger
3. Target BS discovery (e.g DNS lookup)
4. IPSec establishment (if needed)
IP Tunnel
5. Authentication and 802.16 Registration procedure
(IEEE802.16 & WiMAX standard)
9. HO Decision
10. HO Indication
11. WiMAX Air access
12. Service over WiMAX
WiMAX
BS
Basic Call Flow: HRPD to WiMAX [2]
• Step 1: AT is in active state in HRPD network
• Step 2: AT reaches the edge of HRPD network and WiMAX BS is
advertised. Handoff preparation is triggered by AN or AT.
• Step 3: AT performs target WiMAX BS discovery
– DNS lookup (FQDN can be generated based on neighbor list
information)
• Step 4: If needed, AT and target WiMAX BS can establish IPsec
tunnel.
• Step 5-8: AT and target WiMAX network perform authentication,
registration, and connection establishment. (IEEE802.16 & WiMAX
standard)
• Step 9: Handoff from HRPD to WiMAX is decided by AN or AT.
• Step 10: HRPD AN sends HO indication to AT (FFS).
• Step 11: AT access WiMAX air interface using negotiated
parameters. (IEEE802.16 & WiMAX standard)
• Step 12: After completing air interface establishment, service for the
AT continues.
Conclusion
• Samsung proposes IP-level tunneling method to support
HRPD-WiMAX handoff
– Has minimal impact on legacy systems.
– Seamless handoff for real time service (e.g. VoIP) can be
achieved.
– Bi-directional
• Less standard impact
– If CMIP is used, PDS standard impact is small.
– Reuse most of existing standards.
• PMIP should be supported:
– [FFS]
• Samsung recommends that this approach be adopted for
HRPD-WiMAX interworking