An Architecture for UMTSWIMAX Interworking

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An Architecture for UMTS-WIMAX Interworking
LABORATOIRE DE RESEAUX ET SYSTEMES MULTIMEDIA

• Authors Quoc-Thinh Nguyen-Vuong
• Nazim Agoulmine
  Lionel Fiat
• University of Evry, France
  Alcatel, France
• Presenter Q.T. Nguyen Vuong
• nguyenv_at_iie.cnam.fr

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Overview

• Context
• Motivations
• UMTS-WLAN vs. UMTS-WIMAX
• Interworking architecture
• Mobility management solution
• Handover from WIMAX AN to UTRAN scheme
• Handover from UTRAN to WIMAX AN scheme
• Conclusions Future work

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Context
On the move
At the office
On the pause
At home
Corporate (W)LAN
Hotspots
ADSL
Always Best Connected
Service Continuity
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Why UMTS-WIMAX interworking?

• UMTS-WLAN interworking already, why not
  UMTS-WIMAX now?
• Complementarities of WIMAX and UMTS technologies
  in term of geographical coverage, quality of
  service, etc
• Elimination of their stand-alone defects
• Low cost of WIMAX technology deployment
• Etc,

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UMTS-WLAN vs. UMTS-WIMAX
WIMAX
UMTS

• Fully overlapping handover
• WLAN cells considered as micro-cells
• MS can maintain the PDP context while connecting
  to WLAN cells -gt handover from UMTS to WLAN can
  be quickly done.

• Partially overlapping handover
• Handover between two macro-cells
• Handover latency required low

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Interworking architecture
WAG Wimax Access Network ASN GW Access Service
Network Gateway PDG Packet Data Gateway PDN
Packet Data Network AAA Accounting,
Authentication , Authorization RNC Radio
Network Controller SGSN Serving GPRS Support
Node GGSN Gateway GPRS Support Node
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Mobility management solution

• Measurement
• Mobile has one active radio interface at a time
• Each access network can inform the MS the other
  access network neighboring cells information
• MS can measure UMTS radio links while connected
  to WIMAX AN and vice versa
• Handover initiation triggered by mobile or
  network
• Selecting target cell
• Serving network queries the potential target
  cells before deciding
• Handover preparation Target network is notified
  about the imminent handover
• Data buffering
• HA buffers the packets while waiting for the
  registration from target network
• Seamless handover can be achieved by managing the
  buffers in the MS and in the HA

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Handover scenario from WIMAX AN to UTRAN
Wimax BS
Wimax HA
PDG/FA
GGSN/FA
UTRAN
HA
SGSN
MS
WAG
MS
ASN GW/FA
1. advertisement
2. measurement
2. measurement
DNS request
3. measurement report
4. HO request (mobile info, candidate Node B,
APN)
4. HO request
5. HO request
6. Establishment of RAB
7. HO support
7. HO support
7. HO support
HO decision
8. HO command target Node B, pre-conf
11. GPRS attach REQ
11. GPRS attach RSP
12. PDP context activation
13. MIP registration REQ
12. PDP response
12. PDP response
13. MIP registration RSP
communication
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Handover scenario from UTRAN to WIMAX AN
Wimax BS
Wimax HA
Node B
GGSN/FA
SGSN
RNC
MS
MS
ASN GW/FA
WAG
PDG/FA
HA
1. Meas. msg control
2. measurement
2. measurement
3. measurement report
4. HO request (mobile info, candidate BS, APN)
DNS request
4. HO request
4. HO request
4. HO request
5. HO support
5. HO support
5. HO support
5. HO support
6. HO command
HO decision
7. HO confirmation
9. Fast Ranging
8. MIP update
10. RNG-REQ Auth
DHCP
10. RNG-RSP
11. DHCP request
11. DHCP RSP wimax HA_at_, local _at_
11. DHCP RSP local _at_
12. MIP registration
13. PDG _at_ resolution
13. PDG _at_ RSP
14. Tunnel establishment REQ
15. MIP registration
14. Tunnel establishment RSP
communication
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Seamless Service Delivery
ADSL
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Conclusions Future work

• Proposed an interworking architecture and
  handover procedure
• Solution doesnt require a lot of changes in
  existing network infrastructure
• Feasible in shot term (software upgrade only)
• Future work
• Performance evaluation in large scale network
• Study the handover for multiple APN connection
  use case
• Study the tight-coupling interworking
  architecture following the architecture evolution
  of 3GPP
• Study the roaming architecture
• Multiple simultaneous radio interfaces for
  vertical handover

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Thank you