Transcript 21-06-0664-00-0000-QoS_considerations_in_NIHO_v3

IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN: 21-06-0664-00-0000
Title: QoS considerations in Network Initiated Handovers
Date Submitted: May, 16th, 2006
Presented at IEEE 802.21 session #14 in Jacksonville
Authors or Source(s):
Albert Vidal ([email protected])
Telemaco Melia ([email protected])
Daniel Corujo ([email protected])
Abstract: This document presents the study of network initiated
handover scenarios while providing certain QoS to end users and
fulfilling operator’s policies.
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A network initiated handover
study case
• Usually, the mobile terminal is assisting the Decision Engine located in the
network by providing some information, e.g. signal strength.
• In this study, the network decides, because of a change of state in the
network, to handover the terminal from one PoA to another
• Reasons to handover:
• guarantee QoS requirements of user’s applications (data rate, delay, etc.)
• follow operator’s policies, e.g. balancing the load among PoAs avoiding
congested access networks
•
Problem:
• current draft does not provide the means to perform this kind of
handovers
• Assumptions:
• dual interface mobile device
• user is in a overlapping coverage area (PoA1 and PoA2)
• mobile device does not assist the handover, all the ‘intelligence’ is in the
network
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TERMINAL
LL
MIH
PoA1
HL
LL
MIH
PoA2
HL
LL
PoS (MME)
MIH
HL
LL
MIH
HL
IF1 IF2
Old Connection
1. MIH_Required_QoS.Req
2. MIH_QoS_Parameter_Discovery.Req
3. Link_QoS_Parameter_Discovery.Req
4. Link_QoS_Parameter_Discovery.Conf
5. MIH_QoS_Parameter_Discovery.Res
6. MIH_QoS_Parameter_Discovery.Req
7. Link_QoS_Parameter_Discovery.Req
HO Preparation
8. Link_QoS_Parameter_Discovery.Conf
9. MIH_QoS_Parameter_Discovery.Res
10. MIH_Configure_Thresholds.Req
11. Link_Configure_Thresholds.Req
12. Link_Configure_Thresholds.Conf
13. MIH_Configure_Thresholds.Res
14. MIH_Configure_Thresholds.Req
15. Link_Configure_Thresholds.Req
16. Link_Configure_Thresholds.Conf
17. MIH_Configure_Thresholds.Res
18. MIH_Required_QoS.Res
HO Initiation
PoA1 gets overloaded
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19. Link_Parameter_Change.Ind
20. MIH_Link_Parameters_Report.Ind
21. MIH_Required_QoS.Ind
Decision Engine decides to HO
1: QoS Discovery
TERMINAL
LL
MIH
PoA1
HL
LL
MIH
PoA2
HL
LL
MIH
PoS (MME)
HL
LL
MIH
HL
IF1 IF2
Old Connection
1. MIH_Required_QoS.Req
2. MIH_QoS_Parameter_Discovery.Req
3. Link_QoS_Parameter_Discovery.Req
4. Link_QoS_Parameter_Discovery.Conf
5. MIH_QoS_Parameter_Discovery.Res
6. MIH_QoS_Parameter_Discovery.Req
7. Link_QoS_Parameter_Discovery.Req
8. Link_QoS_Parameter_Discovery.Conf
9. MIH_QoS_Parameter_Discovery.Res
•
Use of primitives defined in 21-06-000-00-000-QoSProposal.doc:
•
MIH_Required_QoS
•
MIH_QoS_Parameter_Discovery
 Needs to be redefined also as Network to Network
•
Link_QoS_Parameter_Discovery
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2: Configure Thresholds
TERMINAL
LL
MIH
PoA1
HL
LL
MIH
PoA2
HL
LL
MIH
PoS (MME)
HL
LL
MIH
HL
IF1 IF2
10. MIH_Configure_Thresholds.Req
11. Link_Configure_Thresholds.Req
12. Link_Configure_Thresholds.Conf
13. MIH_Configure_Thresholds.Res
14. MIH_Configure_Thresholds.Req
15. Link_Configure_Thresholds.Req
16. Link_Configure_Thresholds.Conf
17. MIH_Configure_Thresholds.Res
18. MIH_Required_QoS.Res
•
MIH_Configure_Thresholds
•
Needs to be redefined also as network  network
•
Use of QoSParameterList
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3: Handover Initiation
TERMINAL
LL
MIH
PoA1
HL
LL
MIH
PoA2
HL
LL
MIH
PoS (MME)
HL
LL
MIH
HL
IF1 IF2
PoA1 gets overloaded
19. Link_Parameter_Change.Ind
20. MIH_Link_Parameters_Report.Ind
21. MIH_Required_QoS.Ind
Decision Engine decides to HO
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Considerations
•
•
To the current draft:
•
QoS parameters changes can be triggered also by the network, not
only by the terminal.
•
Possibility to reuse the existing primitives in the draft, with some
modifications: the network to network communication is not
supported by the primitive MIH_Configure_Thresholds.
To 21-06-000-00-000-QoSProposal.doc:
•
Network related parameters can also be the reason to initiate a
handover, preventing a QoS degradation at the terminal.
•
Current terminal related QoS parameters defined in
QoSParameterList:
•
•
•
•
•
•
PacketTransferDelay
PacketDelayVariation
PacketLossRatio
PacketErrorRatio
Throughput
•
•
Current load: use of resources at a network entity, e.g. number of users
Total available bandwidth: actual unused bandwidth, assuming that every user is
consuming a different amount of traffic
New network related parameters suggested:
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Step forward
• How 802.21 has to proceed to address all QoS-related issues
considered in the group?
• Option 1:
• Merge the different QoS contributions in the group and
present a unified proposal  submit a unique modification
of the draft.
• Option 2:
• Keep different QoS contributions separated  submit
several modifications of the draft which might be accepted
or not independently.
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• References:
• 21-06-0643-00-0000-QoS_considerations_in_NIHO.doc
• 21-06-000-00-000-QoSProposal.doc
• “draft-melia-mobopts-niho-ps-01”, Internet draft on network
initiated handovers, Work in progress
• “Scalable QoS-Aware Mobility for Future Mobile
Operators”, to appear in IEEE Communications Magazine,
Special issue on scaling the Mobile Internet, June 2006
• Acknowledgements:
• The presented contribution has been studied in the
framework of the IST collaborative project DAIDALOS
(www.ist-daidalos.org), partially founded by the European
commission.
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