Intersystem Vertical handover Switching Time analysis in heterogeneous wireless networks

Transcription

1 Intersystem Vertical handover Switching Time analysis in heterogeneous wireless networs Grebeshov Alexander 1, Gaidamaa Yulija 2, Vihrova Olga 2, Zaripova Elvira 2 1 Povolzhsiy State University of Telecommunications and Informatics, 2 RUDN University, zaripova_er@rudn.university

2 Project group Department of Automatic Telecommunication Povolzhsiy State University of Telecommunications and Informatics Applied Probability and Informatics Department RUDN University The reported study was financially supported by the Ministry of Education and Science of the Russian Federation (the Agreement number 02.a ).

3 Outline Heterogeneous networs (HetNet) WLAN-LTE VHO Procedure Design Mathematical Modelling of VHO Procedure Numerical analysis Further research

4 Focus: Heterogeneity and Heterogeneous Networs Heterogeneity covers different functional level of future networs : mobility support, seamless connection/roaming, security and pacet routing. Ubiquity of HetNet is an integration and cooperation between different radio access networs or networ elements. User-centric policy is more preferable than Networ-centric policy in the context of HetNetand Internet of Thing.

5 Heterogeneous Networ Slices : Internet of Things Can Access All Infrastructure Resources With Multi-Mode Terminal networ slices as end-to-end (E2E) logical networs running on a common underlying (physical or virtual) networ, mutually isolated, with independent control and management, which can be created on demand Ordonez-Lucune, J. et al., IEEE Comm. Mag., May, 2017, p.81.

6 Heterogeneous Networs and Handover Types Horizontal handover homogeneous networ; Vertical handover - heterogeneous networ; The aim of our research: 1) Full VHO procedure with authorization, authentication, re-connection and de-registration. 2) Sojourn VHO time estimation. Vertical Handover Horizontal Handover WLAN enb 1 LTE enb 2 LTE Vertical Handover (VHO) and Horizontal Handover (HHO) Fig. 1. Architecture for WLAN LTE VHO

7 Common-Use VHO Signaling Exchange Model User Equipment (Mobile Device) Current Networ Gateways and Nodes... Access Networ Discovery Support Functions and Spectrum Manager Authorization and Authentication Servers Target Networ Gateways and Nodes (State I) in the Current Networ Connection means physical connection (1) UE or Networ initiated about VHO (2) Information about Target Networ Responce Care of IP address means IP seamless (IP in (State II) VHO Decision Maing current networ = IP in target networ) (3) Authorization and Authentication s and Responces for VHO (4) Connection and Bearer Initialization (State III) Attachment to the Target Networ Without care of Address means IP nonseamless (new IP-address in target networ) (5.1) Resourse Release (without care of IP address) (5.2) IP-session Establishment at the Target Networ (State IV) Traffic flow Transfer at the Target Networ (5.3) Resourse Release (with care of IP address) (State V) VHO completion

8 Bacground and Related Wors: VHO architecture, principles and scenarios 3GPP, IEEE & IETF documents 1. 3GPP TS Architecture enhancements for non-3gpp accesses. Release 14. March GPP TS Networ architecture. Release 14. Sep GPP TS Generic Authentication Architecture; Access to networ application functions using Hypertext Transfer Protocol over Transport Layer Security. Release 13. Jan IEEE Std IEEE Standard for Local and metropolitan area networs. Media Independent Handover Services. Nov IETF RFC 4555 Mobility and Multihoming Protocol (MOBIKE). Jun IETF RFC 4793 The EAP Protected One-Time Password Protocol (EAP-POTP). Feb IETF RFC 5555 Mobile IPv6 Support for Dual Stac Hosts and Routers. Jun IETF RFC 5996 Internet Key Exchange Protocol Version 2 (IKEv2). The IETF Trust. Sep IETF RFC 6611 Mobile IPv6 (MIPv6) Bootstrapping for the Integrated Scenario. Sep. 2012

9 Bacground and Related Wors: architecture, principles and scenarios VHO architecture, principles and scenarios 10. Xenais D., Passas N., Meraos L., Veriouis C. ANDSF-Assisted Vertical Handover Decisions in the IEEE /LTE-Advanced Networ. Computer Networs, Vol.106 (Sep 2016), Triantafyllopoulou D., Guo T., Moessner K. Energy Efficient ANDSF-assisted Networ Discovery for non-3gpp Access Networs. In Proceedings of the 2012 IEEE 17th International Worshop on Computer Aided Modeling and Design of Communication Lins and Networs (Sep ). IEEE Pp Boccardi F., Heath R.W., Lozano A.; Marzetta T. L., Popovsi P. Five Disruptive Technology Directions for 5G. IEEE Communications Magazine, Vol.52 (Feb 2014), Gast M.S Wireless Networs The Definitive Guide. O Reilly, Sebastopol, CA VHO estimation data 14. Niaein N., Krco S Latency for Real-Time Machine-to-Machine Communication in LTE-Based System Architecture. Proceedings of the th European Wireless Conf. (Apr. 2011). IEEE, Pp Granlund D., Holmlund P., Åhlund C. Opportunistic Mobility Support for Resource Constrained Sensor Devices in Smart Cities. Sensors, Vol.15 (Mar. 2015), Pp Cardona, N., Monserrat J.F., Cabrejas J. Enabling Technologies for 3GPP LTE-Advanced Networs. In LTE-Advanced and Next Generation Wireless Networs Pp

10 WLAN-LTE VHO procedure design Tass: 1. Complicated VHO procedure as a sequence of signaling messages. 2. Vertical handover time estimation method for VHO procedure. 3. Numerical analysis for VHO. Fig. 2. Architecture for WLAN LTE VHO

11 WLAN-LTE VHO procedure design. Phase A and B UE (1)Client Hello message (2)Server KeyExchange message (3)Client KeyExchange message (4)Change CipherSuite Finished message TLS IPSec tunnel (5)Access Networ Info (6)Access Networ Info Networ Discovery Decision Phase A ANDSF UE epdg (7) UE Initial Attach (10) IP address HA (23)IKE_AUTH_ UE discovers 3GPP access and initiaties VHO (11) IKE_SA_INIT (12) IKE_SA_INIT (13) IKE_Auth_ (16) IKE Auth (17) IKE_Auth_ (20) IKE_AUTH_ (21) IKE_AUTH_ P-GW (8) P-GW ID (9) IP address P-GW [Home agent] (22) IKE_AUTH_ IP Sec / DSIMPv6 bootstrapping throw S2c Phase B (14) Auth_ (15) EAP / AKA Challenge (18) EAP-/ AKA Challenge (19)Authentication Answer/ EAP success HSS/AAA Fig. 3. WLAN LTE VHO Procedure

12 WLAN-LTE VHO procedure design. Phase C UE E-UTRAN MME S-GW P-GW hpcrf (24) RRC Attach (25) RRC Connection Setup (26) RRC Connection Setup Complete (27) Attach (28)Create (33)Create Radio and Access Bearer (34)Modify Bearer (37) Modify Bearer (38) Binding Revocation Indication (29)Create (32)Create ] (35)Modify Bearer (36) Modify Bearer UE sends and recevies data via 3GPP (LTE) access (39) Binding Update (BU) message (40) Binding Acnowledgement message Pacets forwarded to the UE without tunnelling (30) Initiated IP session (31) Create VHO Procedure includes 9 functional entities I - UE II - ANDSF III - epdg IV - enb V - MME VI - S-GW VII - P-GW VIII - hpcrf IX - HSS / AAA and 40 signaling messages Phase С Fig. 4: WLAN LTE VHO Procedure

13 Mathematical modelling of VHO procedure Approximate method for sojourn time quantile estimation in multistage queueing system with bacground traffic UE UE (1)Client Hello message (2)Server KeyExchange message (3)Client KeyExchange message (4)Change CipherSuite Finished message TLS IPSec tunnel (5)Access Networ Info (6)Access Networ Info epdg (7) UE Initial Attach Networ Discovery Decision (10) IP address HA (23)IKE_AUTH_ (11) IKE_SA_INIT (12) IKE_SA_INIT (13) IKE_Auth_ (16) IKE Auth (17) IKE_Auth_ (20) IKE_AUTH_ (21) IKE_AUTH_ ANDSF P-GW (8) P-GW ID (9) IP address P-GW [Home agent] (22) IKE_AUTH_ (14) Auth_ (15) EAP / AKA Challenge (18) EAP-/ AKA Challenge (19)Authentication Answer/ EAP success HSS/AAA UE IP Sec E-UTRAN / DSIMPv6 bootstrapping MME throw S-GW S2c P-GW hpcrf (24) RRC Attach UE discovers 3GPP access (25) and RRC initiaties Connection VHO Setup (26) RRC Connection Setup Complete (27) Attach (28)Create (33)Create Radio and Access Bearer (34)Modify Bearer (37) Modify Bearer (38) Binding Revocation Indication (29)Create (32)Create ] (35)Modify Bearer (36) Modify Bearer UE sends and recevies data via 3GPP (LTE) access (39) Binding Update (BU) message (40) Binding Acnowledgement message Pacets forwarded to the UE without tunnelling (30) Initiated IP session (31) Create l 1 l 2 l 0 l 0 l 0 l 1 l 2 Foreground traffic Bacground traffic K = 39. b - mean service time of the foreground customers, d - mean service time of the bacground customers, l0 - arrival rate of the foreground customers, l - arrival rate of the bacground customers, r = l b l d -load of intensity, Coefficient of variation of the waiting time: (2) (2) ( l0 + l)( l0b + ld ) (1) (1) 2 ( l0b + ld ) C = - 1, = 1, K. (1)... l K l K l 0

14 Approximate method for sojourn time quantile estimation in multistage queueing system with bacground traffic Sojourn waiting time at Sojourn VHO time: - stage: ( 1+ C ) 2 2 r w =, = 1,..., K. (2) 2 1 ( l + l )( -r ) 0 K å = 1 ( w b ) D = +. Quantile level y of a VHO time: where q y ( gw) K æln ö Qy» qy + åç + b, (4) = 1 è g ø is the unique positive root of equation K = 1 -g q ( g qy ) (3) y 1 y e. (5)! - =å

15 Numerical Experiment. Average Service Time Nodes Average service time, ms Ref. I - UE 77.5 for (24) (Niaem and Krco, 2011) 28.5 for (26) 2 for other steps II - ANDSF 70 (estimated as HSS/ AAA) III - epdg 2 (estimated as P-GW) IV - enb 4 (Cardona, et al., 2013) V - MME 15 for (27) 1 for other steps (Cardona, et al., 2013) (Prados-Garzon et. al, 2015) VI - S-GW 2 (Niaem and Krco, 2011) VII - P-GW 2 (Niaem and Krco, 2011) VIII - hpcrf 70 (estimation as HSS / AAA) IX - HSS / AAA 70 (Granlund et. al., 2015)

16 Numerical Example. Approximate method for VHO time quantile estimation in multistage queueing system with bacground traffic Sojourn VHO time 95% quantile a) l = l ; b) l = 10 l ; c) l = 100 l ; Fig. 5. VHO time estimation

17 Numerical Example. Approximate method for sojourn time quantile estimation in multistage queueing system with bacground traffic Среднее время переключения, [c] 1,1 1,0 0,9 0,8 0,7 (a) d_ = 10 (b) d_ = 20 (c) d_ = 50 0, Интенсивность запросов на вертикальный хэндовер, [1/c] 95% Квантиль,[c] 1,2 1,1 1,0 0,9 (a) d_ = 10 (b) d_ = 20 (c) d_ = 50 0, Интенсивность запросов на вертикальный хэндовер, [1/c] 200 Sojourn VHO time 95% quantile (a) d = 10 ; (b) d = 20 ; (c) d = 50. Fig. 6. VHO time estimation

18 Conclusion and Further research: 1. We developed a mathematical model for vertical handover estimation as a queueing networ. 2. We recommend approximate method for sojourn VHO time and its quantile estimation using multistage queueing networ model with bacground traffic. 3. This method of sojourn time quantile estimation in multistage queueing system has following advantages: possibility of sojourn time cumulative distribution function calculation, method of sojourn time quantile estimation, accuracy of estimation as compared with the simulation model (<7%). 4. The aim of our further research is the scheme of a VHO from a LTE networ to WLAN will be discussed.