an investigation on mobility management in an lte-a inter...
TRANSCRIPT
AN INVESTIGATION ON MOBILITY
MANAGEMENT IN LTE-A INTER-HENB;
NETWORK OF FEMTOCELLS.
UNIVERSITY OF JYVÄSKYLÄ,
DEPARTMENT OF MATHEMATICAL INFORMATION TECHNOLOGY.
03 December 2013
Abouck Opu Narcisse, Student: Mobile Technology,
Thesis Presentation.
Prof. Timo Hämäläinen, Thesis Supervisor.
PRESENTATION - OUTLINE
Background
Long Term Evolution Advanced
Femtocell
Mobility Management – Handover
Research Questions and Methodology
Research Related research conducted
Inter HeNB handover
Simulation with ns3
Network of Femtocells
Further Research
References
KEYWORDS
Handover – HO
Long Term Evolution Advanced – LTE-A
Network of Femtocells – NoFs
Discrete Network simulator 3 – ns3
Evolved Node B - eNB
Home eNB - HeNB
Third Generation Partnership Project - 3GPP
Mobile Network Operator – MNO
Self optimizing Network – SON
Mobility Management – MM
RSRP – received signal power
RSRQ – receive signal quality
FEMTOCELL - HENB
Small base station
Low transmission
power & capacity
2 – 6 users
SON properties
Good RSRP & RSRQ
RAN in E-UTRAN
femtocells in E-UTRAN architecture (3GPP)
Femtocells architecture (Lan et ., 2009)
PURPOSE OF RESEARCH
HeNB, better data rates
UE moving into HeNB for better data rates
UE moving for better QoS of calls
MNO spend less on operations
60% of mobile data originates from HeNB
MM and HO become important in Femtocells
No standardized solution for HO in Femtocells
eNB -> HeNB is very slow
3GPP specification – traffic offload
RESEARCH PROBLEMS
How is HO from HeNB -> HeNB completed
autonomously without signalling leaving for the
Femtocell?
How can a HO from HeNB -> HeNB which is
connected to another NoFs be completed without
the involving the MME and S-GW?
Is the HO algorithm for inter-HeNB efficient
enough to enhance mobility?
RESEARCH METHODOLOGY
Constructive Research Methodology is employed
Commonly used in computer science research
Employs systematic five stages and check at
arrive at goal:
1. Practical problem – inter-HeNB HO lack
2. Understanding Research Problem – related work
3. Improved \ Novel solution – inter-HeNB HO
improvements
4. Demonstrate solution – ns3 simulation
5. Applicability – confirm to 3GPP specs
RELATED WORK 1
Lan, Yongsheng & Zhenrong (2009) “Mobility
Management Schemes at Radio Network Layer for LTE
Femtocells”
Proposed solutions for HeNB HO
Introduce the HeNB gateway to control HeNB
Their first proposal used HeNB GW to restrict
HeNB traffic
Their second proposal did not limit traffic nor
aligned with 3GPP specs.
RELATED WORK 2
Kwak, Lee, Kim, Saxena & Shin (2008).
“Mobility Management Survey for Home-eNB Based
3GPP LTE Systems”.
They explained factors affecting HeNB HO
They identified RSSI as main determinant
Load balancing
Lack of Automatic Neighbour Relation (ANR)
Lack X2 interface in HeNB
UE mobility speed
RELATED WORK 3
Haijun, Wenmin, Wei, Wei, Xiangming &
Chunxiao (2011), “Signalling Cost Evaluation of
Handover Management Schemes in LTE-Advanced
Femtocell”
Proposed algorithm for HO based on mobility
HO at low mobility for better QoS
Time to stay was also considered
HO discourage at high mobility
Assumed cells had clear boundaries
Considered only mobility for HO
RELATED WORK 3-B
Old – HO increased with
high mobility
More HO and less data
transferred
New – less Ho at high
mobility
No HO at very high
mobility.
signalling overhead versus high speed user proportion (Haijun,
Wenmin, Wei, Wei, Xiangming & Chunxiao, 2011)
HO ENB – HENB
eNB -> HeNB HO sequence (Lan, Yongsheng & Zhenrong, 2009)
SIMULATION – NS3
LTE module - No support for HeNB HO
Scenario – HO eNB – HeNB in densely deployed
HeNB in eNB coverage
NS3 HO parameters
Parameters Values Descriptions --nBlocks 6 Number of femtocell blocks (HeNB) --nFloors 1 Number of floors in building --nMacroEnbSites 7 Number of eNodeB --interSiteDistance 500 m Distance between eNodeB --macroUeDensity 0.0001 Density in eNodeB m --useUdp 0 UDP protocol not used --homeEnbDeploymentRatio 0.2 HeNB Deployed ratio in macro --homeEnbActivationRatio 0.5 HeNB active radio in macro --simTime 30 s Duration of simulation --epc 1 --macroEnbTxPowerDbm 46 dBm Transmission power of eNodeB --homeEnbTxPowerDbm 20 dBm Transmission power of HeNB --homeUesHomeEnbRatio 1 Average UE per HeNB --macroEnbBandwidth 25 MHz Bandwidth of eNodeB --homeEnbBandwidth 25 MHz Bandwidth of HeNB
RADIO ENVIRONMENT MAP
eNBs with 3 cells each before HO trigger
HeNB – Green
Building - Yellow
UE - White
TRIGGER HO
4 UE used
1 successful HO
RADIO ENVIRONMENT MAP
After HO trigger
1 HeNB; green arrow
DATA RATES
Before and after HO
NETWORK OF FEMTOCELLS (NOFS)
BeFEMTO Project
LFGW
Local IP Access (LIPA)
Select IP Traffic
Offload (SIPTO)
Peer-peer routing
S-rat Interface
BeFEMTO EPS architecture (Jaime, Josep, Jose &
Frank, 2012).
HO IN NOFS
Proxy MME
Proxy S-GW
Signal offloaded
HO delays
HeNB -> HeNB HO sequence, BeFEMTO
LIMITATIONS & FURTHER RESEARCH
Inter-HeNB HO
Manually trigged
Few HeNBs, UEs &
eNBs.
Calls quality
Many UEs, eNBs &
HeNBs
Dynamic triggers
Radio readings
HeNB – eNB HO
Limitations Further Research
QUESTIONS, PLEASE
Thanks you for
listening
REFERENCES 1
• Ghosh A., Rapeepat R., Bishwarup M., Nitin M., & Tim T. (2010). LTE-Advanced: Next-generation wireless broadband technology. IEEE Wireless Communications, 17(pp. 10-22), Jul. 2010.
• Douglas N. K., Takahito Y. & Frank F. (2009). Standardization of Femtocells in 3GPP. IEEE Communications Magazine, 47 (pp. 68-75). Sep. 2009.
• Juang R.T., Hsin-Piao L., Ding-Bing L. & Wei-Cheng Z. (2006). Verification of Mobility-Based GSM/WCDMA Intersystem Handover Using Measurement Data. IEEE InternationalSymposium on Personal, Indoor and Mobile Radio Communications, 17, (pp. 1-4). 11-14 Sept. 2006.
• Parag K., Woon Hau C. &Tim F. (2010). Radio Resource Management Considerations for LTE Femto Cells. ACM Special Interest Group on Data Communication, Computer Communication Review (SIGCOMM), 40, (pp. 26-40). Jan. 2010.
• Capozzi F., Piro G.,Grieco L. A., Boggia G. & Camarda P. (2012). A system-level simulation framework for LTE Femtocells.International ICST Conference on Simulation Tools and Techniques,5 (pp. 211-213),Jun. 2012.
• Xia P., Chandrasekhar V.& Andrews J.G. (2010). Open vs. Closed Access Femtocells in the Uplink. IEEE Transactions on Wireless Communications, 9 (pp. 3798-3809). Dec. 2010
• Sayenko A. (2013). TIES410 Future Internet, 5 op, spring 2013. University of Jyväskylä’s Faculty of Information Technology course content. Online at http://users.jyu.fi/~timoh/kurssit/ties410/ties410.html. [Oct. 11, 2013],
• Dionysis X., Nikos P., Ayman R., Jonathan R. & Christos V. (2012). Energy Efficiency – The Innovative Ways for Smart Energy, the Future Modern Utilities. Intech 2012
• Dionysis X., Nikos P., Lazaros M. & Christos V. (2013). Mobility Management for Femtocells in LTE-Advanced: Key Aspects and Survey of Handover Decision Algorithms. IEEE Communications, 99(pp. 1-28), Jul. 2013.
• Haijun Z., Wenmin M., Wei L., Wei Z., Xiangming W. & Chunxiao J. (2011). Signalling Cost Evaluation of Handover Management Schemes in LTE-Advanced Femtocell. IEEE 73, Vehicular Technology Conference spring (pp. 1-5) May 15-18 2011.
• Capozzi F., Piro G.,Grieco L. A., Boggia G. &Camarda P. (2013).Downlink packet scheduling in LTE cellular networks: Key design issues and a survey. IEEE Communications Society, 15(pp. 678-700), May. 2013.
• Yagyu K., Nakamori T., Ishii H., Mikio I., Miki N., Asai T. &Hagiwara J. (2011). Investigation on Mobility Management for Carrier Aggregation in LTE-Advanced. IEEE Communications, VTC fall (pp. 1-5) 5-7 Set. 2011.
• Mehdi B., Lorenza G., Emilio M. D., Massinissa L., Masood M., Emilio C. S., Antonio D. D. & Matti L. (2011). Interference Management in Self-Organized Femtocell Networks: the BeFEMTO approach. IEEE Wireless Communication, Vehicular Technology, Information Theory and Aerospace and Electronic Systems Technology (Wireless VITAE), (pp. 1-6) Feb. 28 – Mar. 3 2011.
• Chandrasekhar V., Andrews J.G. & Gatherer A. (2008). Femtocell Networks: ASurvey. IEEE Communications Magazine, 46 (pp. 59-57). 2008.
• Small Cell Forum. (2013). Online at :http://www.smallcellforum.org, [Oct. 02 2013].
REFERENCES 2
• Chairman L., Taesang Y., Clerckx B., Byungiu L.& Byonghyo S. (2013). Recent trend of multiuser MIMO in LTE-advanced. IEEE Communication, 51(pp. 127-135) Mar. 2013.
• Jin-Seok K. & Tae-Jin L. (2010). Handover in UMTS Networks with Hybrid Access
• Femtocells. International Conference on Advanced Communication Technology (ICACT), 12 (pp. 904-908). Feb. 7 – 10 2010.
• Zdenek B. &Pavel M. (2010) .Adaptive Hysteresis Margin for Handover in
• Femtocell Networks.International Conference on Wireless and Mobile Communications (ICWMC), 6 (pp.256-261). Sep. 20 – 25 2010.
• Haijun Z., XiangmingW., Bo W., Wei Z. & Yong S. (2010). A Novel Handover Mechanism between Femtocell and Macrocell for LTE based Networks. International Conference on Communication Software and Networks (ICCSN), 2 (pp. 228-231). Feb. 26 – 28 2010.
• Jung-Min M. & Dong-Ho C. (2010). Novel Handoff Decision Algorithm in Hierarchical Macro/Femto-Cell Networks. IEEE Wireless Communications and Networking Conference (pp. 1-6). Apr. 18 – 21 2010.
• Xuena C., Dengkun X.& Chundi X. (2011).Handover performance of relaxing SCell measurement period in LTE-A with carrier aggregation. IEEE International Conference on Electric Information and Control Engineering (ICEICE), (pp. 438-441). Apr 15 – 17 2011.
• Opportunities and Challenges for Business and Technology. Wiley.
• Gang Y., Xiaoyang W. & Xiaolu C. (2011)Handover Control for LTE Femtocell Networks. International Conference on Electronics, Communications and Control (ICECC) 2011, (pp. 2670-2673), 9-11 Sept. 2011.
• 3GPP, TS 36.331 v11.5.0 (2013-09), “Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification (release 11)”
• Kwak H., Lee P., Kim Y., Saxena N. & Shin J. (2008). Mobility Management Survey for Home-eNB Based 3GPP LTE Systems. Journal of Information Processing Systems (JIPS) 4, No.4. (pp. 145- 152), Dec.2008.
• 3GPP, TR 36.921 v11.00 (2012-09), “Evolved Universal Terrestrial Radio Access (E-UTRA); FDD Home eNode B (HeNB) Radio Frequency (RF) requirements analysis (release 11)”.
• 3GPP, TS 36.422 v11.00 (2012-09), “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 signalling transport (release 11)”.
• 3GPP, TR 36.931 v11.00 (2012-09), “Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Frequency (RF) requirements for LTE Pico Node B (release 11)”.
• 3GPP, TR 36.922 v11.00 (2012-09), “Evolved Universal Terrestrial Radio Access (E-UTRA); TDD Home eNode B (HeNB) Radio Frequency (RF) requirements analysis (release 11)”.
• 3GPP, TS 36.401 v11.20 (2013-09),”Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Architecture description (release 11) ”.
• 3GPP, TR 36.872 v12.00 (2013-09), “Small cell enhancements for E-UTRA and E-UTRAN - Physical layer aspects (release 12)” .
• Stefan P., Anders F. & Erik D. (2011). Evolution of LTE towards IMT-Advanced. IEEE Communications magazine, 99 (pp. 84-91), Feb. 2011.
REFERENCES 3
• Giuseppe P., Nicola B. & Marco M. (2011). An LTE module for the ns-3 network simulator. Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering(ICST) Conference on Simulation Tools and Techniques (pp. 415-422), May 2011.
• Yngve S. & Henrik A. (2008). 3G LTE Simulations Using Measured MIMO Channels. IEEE, Global Telecommunications Conference (GLOBECOM), (PP. 1-5), Nov. 30 – Dec. 04 2008.
• Dong Z. & Zhongming L. (2012). The Study of MIMO Channel Modeling and
• Simulation based on 3GPP LTE. IEEE, International Conference on CECNet, 2(pp. 3646-3651), Apr. 21 – 13 2012.
• Broadband evolved FEMTO Networks (BeFEMTO), online at: www.ict-befemto.eu [Oct. 22, 2013].
• 3GPP, TR 36.902 v9.3.1 (2011-04), “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Self-configuring and self-optimizing network (SON) use cases and solutions (release 9)”.
• 3GPP, TR 36.872 v12.00 (2013-09), “Small cell enhancements for E-UTRA and E-UTRAN –
• Lan W., Yongsheng Z. & Zhenrong W. (2009). Mobility Management Schemes at Radio Network Layer for LTE Femtocells. IEEE Communication, 59 VTC Spring (pp. 1-5) 26-29 Apr. 2009.
• IETF (2005). IKEv2Protocol. Online at http://tools.ietf.org/html/rfc4306 [Oct. 22, 2013]
• Third Generation Partnership Project (3GPP). (2010). E-UTRA and E-UTRAN Overall Description. TS 36.300 v10.0.0, 2013.
• Chia-Wei C., Yu-Hsiang L., Rong-Hong J. & Chien C.
(2012). Efficient Measurement Procedure for Handover
in LTE Femtocell Networks. IEEE International
Conference on Selected Topics in Mobile and Wireless
Networking (iCOST), (pp. 119-123). 2-4 Jul. 2012.
• Jaime F., Josep M., Jose N. & Frank Z. (2012). Traffic
and Mobility Management in Networks of Femtocells.
Springer US.
• Rafel S., Niklas S., Anser A. & Yum A. (2012) LTE
Uplink Transmission Scheme. California State
University.Online at
http://www.mehrpouyan.info/Projects/Group%201.pdf,
[Oct. 6, 2013].
• Simon S., Stuart C., Andrea G., Ravi B., Srinivasa R.
& Rasa S. (2009). Femtocells Opportunities and
Challenges for Business and Technology. Wiley.
• 3GPP, TR 36.828 v11.00 (2012-06), “Evolved
Universal Terrestrial Radio Access (E-UTRA);
Further enhancements to LTE Time Division Duplex
(TDD) for Downlink-Uplink (DL-UL) interference
management and traffic adaptation (release 11)”.
• 3GPP, TR 36.871 v11.00 (2011-12), “Evolved
Universal Terrestrial Radio Access (E-UTRA);
Downlink Multiple Input Multiple Output (MIMO)
enhancement for LTE-Advanced (release 11)”.
•