QoS based vertical handoff method between UMTS systems and wireless LAN networks
|
|
- Matilda McCarthy
- 6 years ago
- Views:
Transcription
1 QoS based vertical handoff method between UMTS systems and wireless LAN networks Sungkwan Jung and Dong-ho Cho Div. of EE, Dept. of EECS Korea Advanced Institute of Science and Technology Daejeon, Rep. of Korea Osok Song Telecommunication R&D center Samsung Electronics Co., LTD Suwon, Rep. of Korea Abstract Future mobile telecom systems will most probably consist of various radio access networks to utilize various merits. A typical scenario of these network integrations is an interworking between UMTS and WLAN network. UMTS network is one of most prevalent network that can cover wide area and wireless LAN (WLAN) network is a good and cheep solution for local high speed data network. Thus, the integration of these two networks enables users to be satisfied with an enhanced service coverage and quality. But, the different characteristics of these integrated networks may degrade the service quality during the changes of access networks, so called, handoffs. To minimize the service quality degradations, for examples, longer handoff delay, more packet losses, decreased throughput and network disconnection, we proposed a QoS based vertical handoff scheme for UMTS and WLAN integrated networks. The main points of our proposed scheme are target cell searching through the connected access network and QoS based handoff. Simulation results show that our proposed scheme gives an increased QoS support during vertical handoffs. Keywords- UMTS, WLAN, interworking, QoS support handoff I. INTRODUCTION Most of people agree that future wireless telecommunication networks will consist of overlaid various mobile networks.[1] Due to their different coverage and costs, various mobile networks have pros. and cons. To enhance a future mobile telecommunication system, people try to gather the pros of each mobile network to make heterogeneous networks interwork as a single wireless mobile network. UMTS network [2] can cover a wide area and support user mobility and high speed mobile users. But complex signal processing technologies to overcome the problem of varying wireless channel conditions and to support multiple user access limit the maximum data transmission rate and cause high cost to use. Wireless LAN networks using IEEE (a/b/g) [3] can not cover a wide area but it can support a high speed transmission rate with very cheep cost. This high speed data rate can be achieved by simple signal processing and radio resource control. The interworking between UMTS networks and Wireless LAN networks can provide better services to the subscribers. But these two networks have different characteristics. One is telecommunication network and the other is data communication network. So, the integration of these two networks to provide services as a single interworking network has some difficult problems to solve. Because wireless LAN network doesn t have mobility management and fair radio resource management, wireless LAN networks need some mobility management functions and radio resource control functions. In UMTS networks, GTP based mobility management is provided. [2] But this mobility management scheme is a local mobility management. It can support the user mobility within its own network and can not support the user mobility between other communication networks, such as public Internet. Thus, IETF Mobile IP protocol is used to support macro mobility management. [4] Using this Mobile IP protocol based mobility management scheme can make UMTS and wireless LAN networks easily interwork each other. In addition, the interworking network architecture will be based on IP protocol which enhances the interoperability and flexibility. But, IP protocol and Mobile IP protocol were not basically designed to support the real-time applications and user mobility. So, during the handoff between wireless LAN networks and UMTS systems, users will experience the service discontinuity, such as long service time gap or network disconnection. Besides this service discontinuity, the different service characteristics of these interworked networks may degrade the Quality-of- Services (QoSs). In this paper, we research the problems that might occur during handoffs between the interworked networks, especially QoS supporting method. In section II, we briefly describe the interworking standardization works of UMTS and wireless LAN and the QoS supporting problem when users handoff between two networks. And, we mention our proposed solution that can enhance service quality during handoffs in section III. Then, we show that our proposed scheme can provide the enhanced handoff performance by simulations in section IV, and conclude this paper in section V. II. STANDARDIZATION OF UMTS-WLAN INTERWORKING 3G Partnership Project (3GPP), which is a world wide specification group that considers the GSM and UMTS standards, has been studying the interworking architecture of 4451
2 UMTS systems and wireless LAN. After some year works, the basic interworking architecture shown in Fig. 1. was established.[5] When the UE tries to connect UMTS system through wireless LAN, it is connected to GPRS networks via WLAN Access Gateway (WAG) which manages access network security, accounting and routing functions. Through the WAG, UE s access is connected to the Packet Data Gateway (PDG) that controls the major functions of the access through wireless LAN, such as IP address allocations, tunnel establishments, routing managements and etc. But, upto now, the interworking scenario concerning how users can access UMTS networks through wireless LAN has been studied. This access standard just includes interworking architecture, authentication and authorization methods, billing and account methods, and basic requirements on the UE and interworking networks. After the establishment of this basic access method, the user mobility support method that concerns the handoff between these two networks for service continuity has been researched. The fundamental working assumption about the inter-network handoff standards is to use IETF Mobile IP protocol for supporting user mobility between UMTS systems and wireless LAN. But UE can not know whether there is any cell that can support UE s required service rate until UE connects to the target network because this handoff is an inter access network (AN) handoff. If UEs try to handoff between different ANs without these information, they experience service discontinuities, performance decreases, and service delays. To solve these QoS support problems, UEs need to know QoS support information in target networks before they actually initiate handoff. III. PROPOSED SEAMLESS QOS HANDOFF SCHEME In this section, we propose a new handoff method that can support UE s required QoS during inter-network handoff for the UMTS and wireless LAN interworking. The fundamental idea of our proposed scheme is to search QoS supportable cells or APs through already connected wireless AN. Before executing a vertical handoff, a UE gathers IDs of target cells or APs using target wireless interface, and then sends this information through the network that the UE already has a connection to negotiate the QoS availability. Thus, we can increase the success rate of vertical handoff and minimize the handoff time delay until the UE gets the required QoS services due to the advanced QoS negotiation and resource preparation. A. Functional requirements for entities Functional requirements for entities to support seamless QoS handoff are described below. Figure 1. Interworking network architecture between UMTS and WLAN Considering a vertical handoff based on this interworking architecture, we have a serious problem that it is difficult to support a seamless service during inter-an handoff. The service interworking architecture and procedures, the way to provide the network and user securities, the control scheme for minimizing performance decrease caused by different service data rate, and the interworking network detection and selection methods are typical problems and to be solved to provide the stable and continuous services to users. Among these many problems, we focus on the control scheme for providing continuous services to users. When there is a user movement, it is necessary to control the data service rate. Especially, when the user is handoffed from wireless LAN to UMTS network, affordable QoS control scheme is needed for continuous and seamless service support because there is a high probability of network congestion or service quality decrease due to data rate difference between high data rate of wireless LAN and medium to low data rate of UMTS. Though it can not always possible to support high data rate services in UMTS unlike wireless LAN, using a suitable QoS control mechanism may give smooth service continuity to subscribers. 1) GGSN and PDG Data forwarding function of inter GGSN (and PDG) There is no data forwarding function between GGSNs, which causes long IP service delays after the changes of ANs due to the time required for reconfiguration of IP parameters. This inter-ggsn data forwarding function can eliminate the necessity of IP mobility support for vertical handoff. 2) WAG Inter SGSN handoff-like data forwarding function Management of mapping table between AP/Node-B ID and SGSN/WAG To adopt our proposed vertical handoff procedure, it is required for WAG to provide more functions. Inter SGSN data forwarding function is required to minimize the packet loss during a vertical handoff. And to adopt our proposed scheme, WAG has to maintain mapping information between AP/cell ID and SGSN/WAG. Based on this mapping table, WAG can find the target SGSN or WAG to forward the request when it receives a vertical handoff information request from a UE. 3) UE WLAN/UTRAN layer 2 trigger function It is needed to initiate layer 3 handoff procedure as soon as the UE detects/decides layer 2 handoff. Previous layer 3 handoff procedure is initiated when IP mobility support layer detects the change of IP network, but this IP network detection consumes too much time after an IP network change. Thus, 4452
3 layer 2 triggering function is required to minimize the time delay and to enhance the seamless property of vertical handoff. B. Seamless QoS handoff procedure 1. When a UE decides to perform a vertical handoff, it gathers a neighboring cell information by receiving cell broadcast information. Thereafter, it sends a Vertical Handoff Info Request message that contains the received cell information such as target network ID, received cell ID and signal strength, and UE s QoS requirement, to WAG. 2. When the WAG receives this message from UE, the WAG forwards it to the corresponding SGSNs that control the reported cell ID according to the mapping table. 3. After receiving the message, SGSN examines the message to identify the RNC corresponding to the reported cell ID, and sends the message to the RNC. 4. The RNC decides whether it can support the QoS requirement of UE if the UE is connected to it. And, according to the decision, it generates the response message that contains the possible QoS profile and transfers it to the SGSN. 5. The SGSN gathers the response messages and transfers them to WAG. 6. The WAG integrates the received cell information messages into Vertical Handoff Info Response message and transfers it to the UE. 7. After receiving the response message, the UE decides the handoff target cell ID that can support its required QoS profile. And then, it really tries to handoff to the specific target cell by sending Vertical Handoff Request message. 8. The WAG sends a Relocation Request message to the corresponding SGSN to inform a vertical handoff. 9. The SGSN forwards this message to the RNC that controls the target cell. 10. When the RNC receives a Relocation Request message, it recognizes the initiation of vertical handoff procedure and reserves the wireless resources to support the required QoS profile. After the reservation, the RNC sends a Relocation Request Acknowledge message to the SGSN. 11. The SGSN forwards this message to the WAG to inform a reservation result. 12. After the WAG receives a Relocation Response message, it starts the forwarding of buffered data to the corresponding RNC for seamless data transfer. 13. The WAG informs the UE of the fact that the target network is prepared to accept the UE s handoff. 14. The WAG also informs the PDG that the UE performs a vertical handoff. 15. The WAG sends the packet transfer context to the SGSN for context management. 16. The SGSN forwards the received context to the RNC. Figure 2. Signaling chart for our proposed QoS handoff scheme 17. When the RNC receives the packet transfer context, it prepares the continuous packet transmission according to the received context. And it sends the acknowledge message to the SGSN. 18. The initiation of the vertical handoff is notified to the PDG by the message from WAG. Then, the PDG sends context information to the GGSN for supporting a continuous service after the vertical handoff in UMTS networks. 19. Based on the received context information, the GGSN regenerates a PDP context to support the UE after vertical handoff, and sends the acknowledge message to the PDG. 4453
4 20. After the receiving of RNC relocation message from the RNC, the SGSN sends a PDP context update message to the GGSN. 21. The GGSN activates the PDP context based on the received PDP context information from SGSN, and notifies the SGSN that the PDP context update is completed. 22. The UE tries to connect to the UTRAN by sending RRC messages. 23. The RNC confirms the vertical handoff of the UE by receiving RRC messages and notifies the vertical handoff execution to the SGSN. 24. The SGSN sends the Relocation Complete Message to the WAG to notify that the vertical handoff procedure is completed. 25. By receiving the Relocation Complete Message, the WAG confirms that the UE is disconnected and sends the Relocation Complete Message to the SGSN in reply. 26. After the vertical handoff completion, all the data packets destined to the PDG are forwarded to the GGSN. IV. PERFORMANCE EVALUATION For the performance evaluation of the proposed QoS support vertical handoff scheme, we simulated our proposed scheme and the basic vertical handoff scheme. This performance comparison by simulation depends on cell structure, cell load distribution, QoS requirement of UEs, and the mobility of UEs, but it can provide the relative performance and the operability of the proposed scheme. Figure 3. Configuration of simulation network At first, we assume the following simulation network shown in Fig UMTS cells are located in 3 Km by 3 Km rectangular area and 25 wireless LAN APs are installed in the center of the area as hot spots. Each UMTS cell has a circular coverage of radius 1.1 Km and each wireless LAN AP has a circular coverage of radius 128 m. Each UMTS cell has a limited traffic bandwidth of maximum 128 kbps and background traffic as a cell load parameter. For wireless LAN APs, we assume a maximum traffic bandwidth is 512 kbps and they also have the background traffic to change their traffic loads. In this environment, 20 UEs move in a random direction with the variable velocity of 1~8 m/s and have the required service bandwidth of 25 kbps, 50 kbps and 125 kbps according to the simulation parameter. Figure 4. State transition diagram of UE To describe the UE s operation, we define 6 states and the state transition diagram as shown in Fig. 4. The defined states are described as following. IDLE UE is connected to the networks, and is not located in handoff region. PROBE_SENT For the vertical handoff, UE sent a vertical handoff candidate probing message. Using this message, UE tried to find cells that can support its QoS requirement in the target network. PROBE_FAIL Though a UE sent a candidate probing message, it can t find any QoS supporting target cell. After some time out, it changes its state into IDLE. PROBED This state indicates that the UE found a QoS supporting target cell information through the probing procedure and can initiate a vertical handoff to that cell. HANDOFF_INIT This state shows that a UE actually started the vertical handoff procedure. DISCONNECTED If there is no cell that has coverage to connect a UE, the UE are disconnected from the network. The basic handoff policy of UE is based on the wireless LAN preferred operation. If a UE finds an available wireless LAN AP during a UE movement, it tries to connect to the wireless LAN AP though it is connected to a UMTS cell. If there is no available wireless LAN AP, it tries to connect to a 4454
5 UMTS cell and if there is no UMTS cell, it is disconnected from a network. In addition, if a UE could not acquire a required bandwidth from the connected cell or AP, it also tries to find another AP or cell that can support better QoS, and if any, it performs a horizontal handoff to that AP or cell. Handoff Count WLAN AP Available BW Difference (kbps) NewHOCount NewQoSSuc NewHoriHO NewQoSFail NewVrtHO OldHOCount OldQoSSuc OldHoriHO OldQoSFail OldVrtHO Figure 5. Numbers of handoff vs. WLAN AP available bandwidth difference The numbers of handoff events vs. the difference of available bandwidth between wireless LAN APs is shown in Fig. 5, in which HOCount, QoSSuc, QoSFail, VrtHO and HoriHO mean the numbers of handoffs, QoS supported handoffs, QoS unsupported handoffs, vertical handoffs and horizontal handoffs, respectively. The results of our proposed scheme are drawn using a dashed line, and the results of previous one are drawn using a solid line. If there is small available bandwidth, the difference between the results of proposed scheme and previous one is small. In this case, because the network is somewhat saturated, our proposed scheme can t find the QoS supported cell or AP around the UE. But, if there is more available bandwidth, our proposed scheme increases the handoff performance, because our proposed scheme decides the handoff target cell or AP based on not only the received signal strength, but also the available bandwidth that could be used after the handoff. QoS Success HO Ratio OldSucRatio NewSucRatio The ratio of the number of QoS supported handoffs to the number of total handoffs is shown in Fig. 6, in which the result of our proposed scheme is shown using rectangles and the result of previous one is shown using triangles. If there is no QoS supportable cell or AP around the UE, our proposed scheme doesn t try a vertical handoff. Thus, the performance of handoff supporting QoS should be considered with respect to the total number of handoffs. Fig. 6 shows that our proposed scheme always provides more QoS supported handoffs regardless of network load. V. CONCLUSIONS In this paper, we study the QoS supported handoff scheme in the interworking of UMTS systems and wireless LAN to provide a seamless packet data service. Among many problems in the interworking networks, we focus on how to minimize the different service characteristics of two interworking networks, and provide a new handoff scheme that enhances the target cell or AP selection scheme during a vertical handoff. Our proposed scheme uses two additional procedures before executing a basic vertical handoff procedure. One is to probe a cell or AP that can support UE s required bandwidth through the already connected network interface. And the other is to select a best one based on not only the signal strength but also the reported available bandwidth. Using these procedures, our proposed scheme increases the number of QoS supported handoffs and decreases the numbers of useless handoffs. In addition, using our proposed scheme makes the network entities prepare for the QoS supporting handoff before a UE actually is handoffed to a new network, thus it can minimize the total handoff delay time. Besides this QoS supporting handoff problem, there are too many problems to be solved to provide a seamless service to a UE when UMTS and wireless LAN are interworked. By solving these problems, we can enhance the upcoming network environments to provide better services for the subscribers. REFERENCES [1] K. Ahmavaara, H. Haverinen and R. Pichna, Interworking Architecture Between 3GPP and WLAN Systems, IEEE Comm. Mag., vol. 41, no. 11, pp 74-81, Nov [2] 3GPP, General Packet Radio Service (GPRS); Service description; Stage 2 (Release 5), 3GPP TS v5.4.0, Dec [3] Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specification, ANSI/IEEE Std :1999 (E) Part 11, 1999 [4] C. Perkins, Ed., IP Mobility Support for IPv4, IETF RFC 3344, Aug [5] 3GPP, 3GPP Systems to Wireless Local Area Network (WLAN) Interworking; System Description (Release 6), 3GPP TS v.2.3.0, Nov WLAN AP available BW difference (kbps) Figure 6. Ratio of QoS successful handoff vs. WLAN AP available bandwidth difference 4455
A Seamless Handoff Scheme for UMTS-WLAN Interworking
A Seamless Handoff Scheme for UMTS-WLAN Interworking Hyun-Ho Choi, Osok Song and Dong-Ho Cho Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology
More informationGPRS and UMTS T
GPRS and UMTS T-110.2100 Global Packet Radio Service GPRS uses the time slots not used for circuit switched services Data rate depends on the availability of free time slots GPRS uses the multislot technique,
More informationUSIM based Authentication Test-bed For UMTS-WLAN Handover 25 April, 2006
USIM based Authentication Test-bed For UMTS-WLAN Handover 25 April, 2006 Hyeyeon Kwon, Kyung-yul Cheon, Kwang-hyun Roh, Aesoon Park Electronics and Telecommunications Research Institute 161, Gajeong-dong,
More informationQoS and Radio Resource Management in 3G and Beyond Systems. Oriol Sallent Kideok Cho
QoS and Radio Resource Management in 3G and Beyond Systems Oriol Sallent Kideok Cho (kdcho@mmlab.snu.ac.kr) 2006. 10. 23 -2/30- Contents Radio Resource Management RRM in Beyond 3G Common RRM in a flexible
More informationVertical Handoff Characterization for SIP and msctp Based UMTS-WLAN Integration Solutions
Vertical Handoff Characterization for SIP and msctp Based UMTS-WLAN Integration Solutions Syed Asadullah, Ashraf S. Mahmoud, Marwan Abu-Amara, Tarek Sheltami Computer Engineering Department King Fahd University
More informationDue to the many benefits provided by both the third-generation (3G) mobile networks and the IEEE wireless local area networks (WLANs), it is
Performance of UMTS/WLAN Integration at Hot-Spot Locations Using OPNET Marwan Abu-Amara, Ashraf Mahmoud, Tarek Sheltami, Adel Al-Shahrani, Khalid Al-Otaibi, S.M.Rehman, and Taha Anwar {marwan, ashraf,
More informationTAKEOVER: A New Vertical Handover Concept for Next-Generation Heterogeneous Networks
TAKEOVER: A New Vertical Handover Concept for Next-Generation Heterogeneous Networks Hyun-Ho Choi and Dong-Ho Cho Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science
More informationPerformance Evaluation of UMTS-WLAN interworking Anita Nanda 1, S.P.Panigrahi 2, R.R.Mohanty 2, N.Panda 2, M.Singh 2, S.M.Rout 2
Performance Evaluation of UMTS-WLAN interworking Anita Nanda 1, S.P.Panigrahi 2, R.R.Mohanty 2, N.Panda 2, M.Singh 2, S.M.Rout 2 1 Comp. Sc., MITS, Rayagada, 2 Electrical Engg., KIST Jatani, Bhubaneswar,
More informationUnderstand iwag Solution for 3G Mobile Data
Understand iwag Solution for 3G Mobile Data Contents Introduction Prerequisites Requirements Components Used Background Information Acronyms Explanation of Terminology Used Understand Mobility Services
More informationEXPERIMENT N0: 06 AIM:TO DESIGN UMTS NETWORK USING OPNET MODELER APPARATUS: OPNET MODELER 14.0
EXPERIMENT N0: 06 AIM:TO DESIGN UMTS NETWORK USING OPNET MODELER APPARATUS: OPNET MODELER 14.0 THEORY:Universal Mobile Telecommunications System (UMTS) is a Third Generation (3G) wireless protocol that
More informationHandover between Macrocell and Femtocell for UMTS based Networks
Handover between Macrocell and Femtocell for UMTS based Networks Mostafa Zaman Chowdhury, Won Ryu, Eunjun Rhee, and Yeong Min Jang Kookmin University, Korea Electronic and Telecommunications Research Institute
More informationVertical and Horizontal Handover in Heterogeneous Wireless Networks using OPNET
Vertical and Horizontal Handover in Heterogeneous Wireless Networks using OPNET Abhishek Dhiman M.E, E.C.E Department, Thapar University, Patiala Karamjit Singh Sandha Asst. Professor, E.C.E Department
More informationCOPYRIGHTED MATERIAL. Contents. 1 Short Message Service and IP Network Integration 1. 2 Mobility Management for GPRS and UMTS 39
Acknowledgments Introduction xv xvii 1 Short Message Service and IP Network Integration 1 1.1 SMS-IP Integration with SM-SC 3 1.1.1 NCTU Short Message System 4 1.1.2 Statistics for SMS Delivery 7 1.2 isms
More informationWiMax-based Handovers in Next Generation Networks
WiMax-based Handovers in Next Generation Networks Nadine Akkari Department of Computer Science Faculty of Computing and Information Technology King Abdulaziz University, Saudi Arabia nakkari@kau.edu.sa
More informationA Mobile IPv6 based Seamless Handoff Strategy for Integrated UMTS-WLAN Networks
GESTS Int l Trans. Computer Science and Engr., Vol.19, No.1 7 A Mobile IPv6 based Seamless Handoff Strategy for Integrated UMTS-WLAN Networks Ying-Hong Wang and Chih-Peng Hsu Department of Computer Science
More informationUMTS System Architecture and Protocol Architecture
UMTS System Architecture and Protocol Architecture Overview on overall system architecture UMTS network architecture and elements Mobile station High-level functions UMTS domains and strata UMTS/GPRS protocol
More informationA Flow Label Based QoS Scheme for End-to-End Mobile Services
A Flow Label Based QoS Scheme for End-to-End Mobile Services Tao Zheng, Lan Wang, Daqing Gu Orange Labs Beijing France Telecom Group Beijing, China e-mail: {tao.zheng; lan.wang; daqing.gu}@orange.com Abstract
More informationSeamless Interoperability Across LTE And WiMAX Using Vertical Handover Mechanism
Seamless Interoperability Across LTE And WiMAX Using Vertical Handover Mechanism Bharatesh Chakravarthi S. B M.Tech. Dept of ISE The Oxford College of Engineering Bangalore, India Prof. D. Jayaramaiah
More informationVery Tight Coupling of Wireless LANs and UMTS Networks: A Technical Challenge and an Opportunity for Mobile Operators
Very Tight Coupling of Wireless LANs and UMTS Networks: A Technical Challenge and an Opportunity for Mobile Operators Manfred Litzenburger, Hajo Bakker, Stephen Kaminski, Klaus Keil Alcatel Research and
More informationCONSISTENT AND SECURE MULTIMEDIA DATA TRANSFER OVER WLAN FUSED NETWORK
International Journal of Computer Networking, Wireless and Mobile Communications (IJCNWMC) ISSN 2250-1568 Vol. 3, Issue 2, Jun 2013, 119-124 TJPRC Pvt. Ltd. CONSISTENT AND SECURE MULTIMEDIA DATA TRANSFER
More informationGPRS billing: getting ready for UMTS
GPRS billing: getting ready for UMTS In his first article about UMTS, Lucas Baugé looks into the key challenges of GPRS billing. He seeks to show how solving these challenges will help operators succeed
More informationFAST INTER-AP HANDOFF USING PREDICTIVE AUTHENTICATION SCHEME IN A PUBLIC WIRELESS LAN
FAST INTER-AP HANDOFF USING PREDICTIVE AUTHENTICATION SCHEME IN A PUBLIC WIRELESS LAN SANGHEON PACK AND YANGHEE CHOI School of Computer Science and Engineering, Seoul National University, Seoul, Korea
More informationPerformance Comparison of UMTS/WLAN Integrated Architectures with Dynamic Home Agent Assignments
Performance Comparison of UMTS/WLAN Integrated Architectures with Dynamic Home Agent Assignments R. Surender, G. Sivaradje and P. Dananjayan Department of Electronics and Communication Engineering, Pondicherry
More informationA Framework for Unified IP QoS Support Over UMTS and Wireless LANs
A Framework for Unified IP QoS Support Over UMTS and Wireless LANs Dimitris Skyrianoglou and Nikos Passas University of Athens Communication Networks Laboratory Panepistimiopolis, 15764, Athens, Greece
More informationA Tightly-coupled Integration Scheme between WiBro and cdma2000 mobile networks
A Tightly-coupled Integration Scheme between WiBro and cdma2000 mobile networks Hongsung Chang 1,YongChang 1, and Jinsung Cho 2 1 Telecommunication Network, SAMSUNG Electrnoics, Suwon 442-742, Korea {hschang7,yongchang}@samsung.com
More informationA Framework for Unified IP QoS Support Over UMTS and Wireless LANs
A Framework for Unified IP QoS Support Over UMTS and Wireless LANs Dimitris Skyrianoglou and Nikos Passas University of Athens, Communication Networks Laboratory, Panepistimiopolis, 15764, Athens, Greece.
More informationUniversity of Würzburg Institute of Computer Science Research Report Series. Performance Comparison of Handover Mechanisms in Wireless LAN Networks
University of Würzburg Institute of Computer Science Research Report Series Performance Comparison of Handover Mechanisms in Wireless LAN Networks Rastin Pries and Klaus Heck Report No. 339 September 2004
More informationNexus8610 Traffic Simulation System. Intersystem Handover Simulation. White Paper
Traffic Simulation System Intersystem Handover Simulation White Paper Notice Every effort has been made to ensure that the information in this document was accurate at the time of printing. However, the
More informationMobile Communications
DSMIPv6, 802.21 1 Mobile Communications IEEE and 3GPP Approaches to Macro-Mobility Manuel P. Ricardo Faculdade de Engenharia da Universidade do Porto How does the Dual Stack MIPv6 work? DSMIPv6, 802.21
More informationHandover Management for Mobile Nodes in IPv6 Networks
TECHNOLOGY ADVANCES FOR 3G AND BEYOND Handover Management for Mobile Nodes in IPv6 Networks Nicolas Montavont and Thomas Noël LSIIT Louis Pasteur University CNRS, Strasbourg ABSTRACT In this article we
More informationBasic SAE Management Technology for Realizing All-IP Network
LTE SAE EPC Special Articles on SAE Standardization Technology Basic SAE Management Technology for Realizing All-IP Network The standardization of 3GPP Release 8 brings new provisions for All-IP networks
More informationEnd-User Controlled Vertical Handover Procedure for 4G Wireless Access Networks
End-User Controlled Vertical Handover Procedure for 4G Wireless Access Networks M. Gopu, Dr. Ritesh Khanna Abstract This paper proposes a user terminal-controlled mobility management across heterogeneous
More informationPERFORMANCE EVALUATION OF UMTS UNDER OSPF, RIP AND IGRP
PERFORMANCE EVALUATION OF UMTS UNDER OSPF, RIP AND IGRP 1 NARESH GULIA, 2 MUKESH KUMAR 1,2 CE Deptt. T.I.T&S College Bhiwani, Haryana Email: nareshgulia1112@gmail.com, drmukeshji@gmail.com Abstract The
More informationSIP as a Unified Signalling Solution in a Beyond 3G System
SIP as a Unified Signalling Solution in a Beyond 3G System Georgios V. Lioudakis, Vaggelis Nikas, Christoph Pollak, Richard Wisenöcker, Nick Dellas Abstract The adoption of packet-switched technologies
More information3G-2G Location Change Reporting
3G/2G Location Change Reporting on the SGSN facilitates location-based charging on the GGSN by providing the UE\'s location information when it is in connected mode. The SGSN notifies the GGSN whenever
More informationDRAFT - QoS Sensitive Roaming Principles 1.0 August 2004
Official Document IR.68 DRAFT - QoS Sensitive Roaming Principles 1.0 August 2004 This is a binding permanent reference document of the GSM Association. Security Classification Category (See next page):
More informationWireless LAN Based GPRS Support Node
Wireless LAN Based GPRS Support Node Vincent W.-S. Feng, Lin-Yi Wu, Yi-Bing Lin, and Whai-En Chen Department of Computer Science & Information Engineering National Chiao Tung University vincentfeng@itri.org.tw
More informationAn efficient trigger to improve intra-wifi handover performance
An efficient trigger to improve intra-wifi handover performance Roberta Fracchia, Guillaume Vivier Motorola Labs, Parc les Algorithmes, Saint-Aubin, 91193 Gif-sur-Yvette, France Abstract Seamless mobility
More informationVHO project Background Information
VHO project Background Information Raimo Vuopionperä (ph.d.) Research Manager, NomadicLab (Ericsson Research Lab @ Finland), Ericsson Research, Corporate Unit Contents Multiple Access Why, What & Definitions
More informationA Seamless Handover Mechanism for IEEE e Broadband Wireless Access
A Seamless Handover Mechanism for IEEE 802.16e Broadband Wireless Access Kyung-ah Kim 1, Chong-Kwon Kim 2, and Tongsok Kim 1 1 Marketing & Technology Lab., KT, Seoul, Republic of Korea {kka1, tongsok}@kt.co.kr
More informationDAY 2. HSPA Systems Architecture and Protocols
DAY 2 HSPA Systems Architecture and Protocols 1 LTE Basic Reference Model UE: User Equipment S-GW: Serving Gateway P-GW: PDN Gateway MME : Mobility Management Entity enb: evolved Node B HSS: Home Subscriber
More informationEnd-to-end IP Service Quality and Mobility - Lecture #5 -
End-to-end IP Service Quality and Mobility - Lecture #5 - Special Course in Networking Technology S-38.215 vilho.raisanen@nokia.com Planned contents & draft schedule 1. Introduction Jan 13th 2. Characteristics
More informationTechnology Supporting Core Network (EPC) Accommodating LTE
IPv6 S1-Flex Registration to multiple TAs Special Articles on Xi (Crossy) LTE Service Toward Smart Innovation Technology Supporting Core Network (EPC) Accommodating LTE To handle the rapidly increasing
More informationFrequency and Time Resource Allocation for Enhanced Interference Management in a Heterogeneous Network based on the LTE-Advanced
ICWMC 23 : The Ninth International Conference on Wireless and Mobile Communications Frequency and Time Resource Allocation for Enhanced Interference Management in a Heterogeneous Network based on the LTE-Advanced
More informationGPRS System Architecture
1 LECTURE 6 GPRS What is GPRS? 2 General Packet Radio Service is an overlay on top of GSM physical layer and network entities It extends data capabilities of GSM and provides connection to external packet
More informationTalk 4: WLAN-GPRS Integration for Next-Generation Mobile Data Networks
Talk 4: WLAN-GPRS Integration for Next-Generation Mobile Data Networks IEEE Wireless Communication, Oct. 2002 Presented by Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering
More informationEvaluation of End-to-End TCP performance over WCDMA
Evaluation of End-to-End TCP performance over WCDMA Liang Hu Department of Communications, Optics & Materials Technical University of Denmark, Lyngby, Denmark Email:{lh}@com.dtu.dk Abstract this article
More informationSeamless roaming between UMTS and IEEE networks
Paper Seamless roaming between UMTS and IEEE 802.11 networks Paweł Matusz, Przemysław Machań, and Józef Woźniak Abstract Mobile Internet access is currently available mainly using 2G/3G cellular telecommunication
More informationOverview of IEEE Networks. Timo Smura
Overview of IEEE 802.11 Networks Timo Smura 24.03.2004 Outline Introduction IEEE 802.11 standards Protocol model Network topologies 802.11 MAC layer 802.11 PHY layers Interoperability: Wi-Fi Alliance 3GPP
More information1. Do the Create PDP or Update PDP requests from the SGSN arrive at the GGSN?
Contents Introduction Background Information GGSN Behavior Cause Code 192 Error Example Scenarios Introduction This document describes the behavior of the Gateway General Packet Radio Service (GPRS) Supporting
More informationAnalysis of a Multiple Content Variant Extension of the Multimedia Broadcast/Multicast Service
PUBLISHED IN: PROCEEDINGS OF THE EUROPEAN WIRELESS 2006 CONFERENCE 1 Analysis of a Multiple Content Variant Extension of the Multimedia Broadcast/Multicast Service George Xylomenos, Konstantinos Katsaros
More informationUMTS Addresses and Identities Mobility and Session Management
UMTS Addresses and Identities Mobility and Session Management - Numbering, addressing and location identities - UE modes - Mobility management - Session management and QoS Numbering, Addressing and Location
More informationA Study on Systems Beyond IMT-2000 in Korea
A Study on Systems Beyond IMT-2000 in Korea May 28, 2002 Vice President Ki-Chul Han, Ph.D (kchan kchan@etri.re. @etri.re.kr kr) Mobile Telecommunication Research Laboratory Electronics and Telecommunciations
More informationEnd-to-end IP Service Quality and Mobility - Lecture #6 -
End-to-end IP Quality and Mobility - Lecture #6 - Special Course in Networking Technology S-38.215 vilho.raisanen@nokia.com Planned contents & draft schedule 1. Introduction Jan 13th 2. Characteristics
More informationCommunication Management
Communication Management Connection management (call control CC) for CS mode Session management (SM) for PS mode References: Kaaranen, Ahtiainen, Laitinen, Naghian, Niemi: UMTS Networks Architecture, Mobility
More informationA Dual-mode Mobile Station Module for WLAN/UMTS Interworking Systems
A Dual-mode Mobile Station Module for WLAN/UMTS Interworking Systems Yu Zhou, Yanxia Rong, Hyeong-Ah Choi, Jae-Hoon Kim, JungKyu Sohn, and Hyeong In Choi Department of Computer Science, George Washington
More informationConfiguring Security on the GGSN
CHAPTER 12 This chapter describes how to configure security features on the gateway GPRS support node (GGSN), including Authentication, Authorization, and Accounting (AAA), and RADIUS. IPSec on the Cisco
More informationLoad Balancing for Cellular/WLAN Integrated Networks
Load Balancing for Cellular/WLAN Integrated Networks Wei Song and Weihua Zhuang, University of Waterloo Yu Cheng, Illinois Institute of Technology Abstract The interworking between heterogeneous third-generation
More informationMultimedia Broadcast and Multicast Service
This chapter provides information on (MBMS) functionality on GGSN. The product Administration Guides provide examples and procedures for configuration of basic services on the system. It is recommended
More informationQoS Multicasting over Mobile Networks
As the number of mobile devices and the kinds of mobile applications explosively increases, the device types become diverse, and mobile networks are prone to be Heterogeneous. Broadcast/Multicast users
More informationIP micro-mobility protocols
IP micro-mobility protocols Pierre Reinbold University of Namur Belgium pre@info.fundp.ac.be http://www.infonet.fundp.ac.be Olivier Bonaventure Université Catholique de Louvain (UCL), Belgium Bonaventure@info.ucl.ac.be
More informationIMS signalling for multiparty services based on network level multicast
IMS signalling for multiparty services based on network level multicast Ivan Vidal, Ignacio Soto, Francisco Valera, Jaime Garcia, Arturo Azcorra UniversityCarlosIIIofMadrid Av.Universidad,30 E-28911, Madrid,
More informationETSI TS V ( )
TS 124 327 V12.0.0 (2014-10) TECHNICAL SPECIFICATION Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Mobility between 3GPP Wireless Local
More informationMobile Network Evolution Part 2
Mobile Network Evolution Part 2 From UMTS to LTE or How to Further Increase Network Capacity and QoS Andreas Mitschele-Thiel Advanced Mobile Communication Networks 1 Outline Evolution from Circuit Switching
More informationDeveloping OSA-based Applications over the Interworking WLAN and Cellular Network Environment
Developing OSA-based s over the Interworking WLAN and Cellular Network Environment Chung-Ming Huang, Tz-Heng Hsu, and Chih-Wen Chao Laboratory of Multimedia Mobile Networking Department of Computer Science
More informationCSC 401 Data and Computer Communications Networks
CSC 401 Data and Computer Communications Networks Wireless Networks Cellular & Mobility Sec 7.4 7.8 Lina Battestilli 7.1 Introduction Wireless Chapter 7 Outline Wireless and Mobile Networks 7.2 Wireless
More information1.1 Beyond 3G systems
1 Introduction The cellular wireless communications industry witnessed tremendous growth in the past decade with over four billion wireless subscribers worldwide. The first generation (1G) analog cellular
More informationTHE VEHICLE MONITORING SYSTEM BASED ON GPRS
THE VEHICLE MONITORING SYSTEM BASED ON GPRS Item Type text; Proceedings Authors Xu, Liu; Qishan, Zhang Publisher International Foundation for Telemetering Journal International Telemetering Conference
More informationSIMULATION FRAMEWORK MODELING
CHAPTER 5 SIMULATION FRAMEWORK MODELING 5.1 INTRODUCTION This chapter starts with the design and development of the universal mobile communication system network and implementation of the TCP congestion
More informationConvergence WLAN/CDMA Architecture. CDG Technology Forum October 7, 2005
Convergence WLAN/CDMA Architecture CDG Technology Forum October 7, 2005 Outline Introduction and Network Architecture Key elements to enable WLAN/CDMA services Access control Mobility management Summary
More informationDirectional Antenna based Time Division Scheduling in Wireless Ad hoc Networks
Directional Antenna based Time Division Scheduling in Wireless Ad hoc Networks Li Shaohua and Dong-Ho Cho School of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology
More informationSupported AVPs in DCCA Messages
CHAPTER B The following sections of this appendix list the vendor-specific attribute value pairs (AVPs) supported by the Cisco GGSN in Diameter Credit Control Application (DCCA) Credit-Control-Request
More informationQOS ANALYSIS OF 3G AND 4G. Khartoum, Sudan 2 unversity of science and Technology, Khartoum, Sudan
QOS ANALYSIS OF 3G AND 4G Doaa Hashim Osman 1, Amin Babiker 2 and Khalid hammed Bellal 1 Department of Communication, Faculty of Engineering, AL Neelain University, Khartoum, Sudan 2 unversity of science
More informationETSI TS V ( )
TS 124 161 V15.0.0 (2018-06) TECHNICAL SPECIFICATION Universal Mobile Telecommunications System (UMTS); LTE; Network-Based IP Flow Mobility (NBIFOM); Stage 3 (3GPP TS 24.161 version 15.0.0 Release 15)
More information3GPP TR V4.0.0 ( )
TR 25.946 V4.0.0 (2001-03) Technical Report 3rd Generation Partnership Project; Technical Specification Group (TSG) RAN; RAB Quality of Service Negotiation over Iu (Release 4) The present document has
More informationUniversity of Agder Department of Information and Communication Technology EXAM
University of Agder Department of Information and Communication Technology EXAM Course code: IKT 444 Course title: Mobile Communication Networks Date: Tuesday, 6 th December 2016 Duration: 09:00 13:00
More informationAn Efficient DECT-Mobile IP Interworking for Mobile Computing
An Efficient DECT-Mobile IP Interworking for Mobile Computing Anthony Lo *, Winston Seah * and Edwin Schreuder + * Centre for Wireless Communications 1, National University of Singapore, 20 Science Park
More informationA Global Mobility Scheme for Seamless Multicasting in Proxy Mobile IPv6 Networks
ICACT Transactions on on the Advanced Communications Technology (TACT) Vol. Vol. 2, 2, Issue Issue 3, 3, May May 2013 2013 233 A Global Mobility Scheme for Seamless Multicasting in Proxy Mobile IPv6 Networks
More informationCircuit switched network
GPRS-Services Page 12 2. GPRS-Services GPRS integrates a vast sum of additional services in a GSM-network. For this it will be necessary to define a subscriber profile that corresponds with services the
More informationTraffic Offloading and Load Balancing to Enable Cloud Computing Connectivity
Int. J. Com. Net. Tech. 1, No. 1, 19-31 (2013) 19 International Journal of Computing and Network Technology Traffic Offloading and Load Balancing to Enable Cloud Computing Connectivity John Cartmell InterDigital,
More informationPOWER-ON AND POWER-OFF PROCEDURES
POWER-ON AND POWER-OFF PROCEDURES TABLE OF CONTENTS 1. Power-On Sequence 2. Network and Cell Selection 3. RRC Connection Establishment 4. Attach Procedure 5. Detach Procedure 1. POWER-ON SEQUENCE The following
More informationOptimization of QoS in 4G Networks Using Handover Management
Optimization of QoS in 4G Networks Using Handover Management NAMRATA KATTI, SEEMA SHIVAPUR, VIJAYALAKSHMI M. Department of Computer Science BVBCET, Hubli namrata.katti1989@gmail.com, seems.laki@gmail.com,
More information3GPP TS V ( )
TS 23.234 V6.10.0 (2006-09) Technical Specification 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; system to Wireless Local Area Network (WLAN) interworking;
More informationPERFORMANCE ANALYSIS FOR GPRS WITH PRIORITIZED AND NON-PRIORITIZED MOBILITY MANAGEMENT PROCEDURES
PERFORMANCE ANALYSIS FOR GPRS WITH PRIORITIZED AND NON-PRIORITIZED MOBILITY MANAGEMENT PROCEDURES Karann Chew, Rahim Tafazolli University of Surrey, United Kingdom Abstract - GPRS is part of the evolution
More informationINTRODUCTION TO LTE. ECE MOBILE COMMUNICATION Monday, 25 June 2018
INTRODUCTION TO LTE ECE 2526 - MOBILE COMMUNICATION Monday, 25 June 2018 1 WHAT IS LTE? 1. LTE stands for Long Term Evolution and it was started as a project in 2004 by the Third Generation Partnership
More informationMobile Network Evolution Part 2
Mobile Network Evolution Part 2 From UMTS to LTE or How to Further Increase Network Capacity and QoS Andreas Mitschele-Thiel Advanced Mobile Communication Networks 1 Outline Evolution from Circuit Switching
More informationVertical Handover in Vehicular Ad-hoc Networks A Survey
Vertical Handover in Vehicular Ad-hoc Networks A Survey U. Kumaran Department of computer Applications Noorul Islam Center for Higher Education, Kumaracoil,Tamilnadu, India. Abstract- Vehicular Ad-hoc
More informationRecognizing Handover Situation for Vertical Handovers using Mobile IPv6 Signaling
IJCSNS International Journal of Computer Science and Network Security, VOL.7 No.4, April 2007 173 Recognizing Handover Situation for Vertical Handovers using Mobile IPv6 Signaling Pyung-Soo Kim 1 and Yong-Jin
More informationPerformance Analysis Of Wi-Fi And Wi-Max Networks During Vertical Handover
Performance Analysis Of Wi-Fi And Wi-Max Networks During Vertical Handover Ashish Mishra Dept. of Computer Science,Pondicherry University Pondicherry Mrs. R.Sunitha Assistant Professor Dept. of Computer
More informationA Fast Handoff Scheme Between PDSNs in 3G Network
A Fast Handoff Scheme Between PDSNs in 3G Network Jae-hong Ryu 1 and Dong-Won Kim 2, 1 Electronics and Telecommunications Research Institute (ETRI) 161 Gajeong-dong, Yuseong-gu, Daejeon, 305-350, Korea
More information3GPP TS V6.4.0 ( )
TS 22.234 V6.4.0 (2006-06) Technical Specification 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Requirements on system to Wireless Local Area Network (WLAN)
More informationBuletinul Ştiinţific al Universităţii "Politehnica" din Timişoara. Seria ELECTRONICĂ şi TELECOMUNICAŢII TRANSACTIONS on ELECTRONICS and COMMUNICATIONS
Buletinul Ştiinţific al Universităţii "Politehnica" din Timişoara Seria ELECTRONICĂ şi TELECOMUNICAŢII TRANSACTIONS on ELECTRONICS and COMMUNICATIONS Tom 58(72), Fascicola 2, 2013 Mobility in LTE Alexandra
More informationETSI TS V ( )
TS 123 327 V12.0.0 (2014-09) TECHNICAL SPECIFICATION Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Mobility between 3GPP-Wireless Local
More informationDistributed or Centralized Mobility?
Distributed or Centralized Mobility? Philippe Bertin, Servane Bonjour Orange Labs Cesson-Sévigné, France {firstname.name}@orange-ftgroup.com Jean-Marie Bonnin TELECOM Bretagne Cesson-Sévigné, France jm.bonnin@telecom-bretagne.eu
More informationOverview of GPRS and UMTS
CHAPTER 1 This chapter briefly introduces the 2.5G General Packet Radio Service (GPRS) and the 3G Universal Mobile Telecommunications System (UMTS) technologies, and their implementation in Cisco Gateway
More informationWIRELESS SYSTEM AND NETWORKING
LECTURE 6 WIRELESS SYSTEM AND NETWORKING References: Rappaport (Chapter 9 and 10) Bernhard (Chapter 3, 4 and 5) Garg (Chapter 8 and 9) Kaarenen (Chapter 1-5 and 9) WIRELESS EVOLUTION Japan Europe Americas
More informationVertical Handover Support in Coordinated Heterogeneous Radio Access Networks
Vertical Handover Support in Coordinated Heterogeneous Radio Access Networks R. Ferrús, A. Gelonch, O. Sallent, J. Pérez-Romero N. Nafisi, M. Dohler Signal Theory and Communications Department, UPC, Barcelona
More informationInterference Mitigation Using Dynamic Frequency Re-use for Dense Femtocell Network Architectures
Interference Mitigation Using Dynamic Frequency Re-use for Dense Femtocell Network Architectures Mostafa Zaman Chowdhury, Yeong Min Jang, and Zygmunt J. Haas * Department of Electronics Engineering, Kookmin
More informationThe Evolution and Future of Mobile Communication Systems. Written by David G Ainscough Copyright 2001 D.G.Ainscough
The Evolution and Future of Mobile Communication Systems Written by David G Ainscough Copyright 2001 D.G.Ainscough Chapter 5 : UMTS (Universal Mobile Telecommunication System)...3 5.1 UMTS Introduction...5
More informationInterference Management Scheme for Wireless Sensor Network
, pp.64-69 http://dx.doi.org/0.4257/astl.204.46.5 Interference Management Scheme for Wireless Sensor Network Sangmi Moon, Saransh Malik, Bora Kim, Hun Choi, Jinsul Kim, Cheolhong Kim, and Intae Hwang Dept.
More information