* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 21-06-0664-00-0000-QoS_considerations_in_NIHO_v3
Survey
Document related concepts
Cracking of wireless networks wikipedia , lookup
SIP extensions for the IP Multimedia Subsystem wikipedia , lookup
Piggybacking (Internet access) wikipedia , lookup
Computer network wikipedia , lookup
Zero-configuration networking wikipedia , lookup
IEEE 802.1aq wikipedia , lookup
Airborne Networking wikipedia , lookup
List of wireless community networks by region wikipedia , lookup
Recursive InterNetwork Architecture (RINA) wikipedia , lookup
IEEE 802.11 wikipedia , lookup
Transcript
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. 21-06-0664-00-0000 IEEE 802.21 presentation release statements This document has been prepared to assist the IEEE 802.21 Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.21. The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual <http://standards.ieee.org/guides/opman/sect6.html#6.3> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html> 21-06-0664-00-0000 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 21-06-0664-00-0000 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 21-06-0664-00-0000 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 21-06-0664-00-0000 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 21-06-0664-00-0000 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 21-06-0664-00-0000 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: 21-06-0664-00-0000 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. 21-06-0664-00-0000 • 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. 21-06-0664-00-0000