Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
Filters








414 Hits in 3.7 sec

Exploration for Soft Handoff Decorations in CDMA Systems

G. Kesavan, S. Palani
2014 Research Journal of Applied Sciences Engineering and Technology  
The proposed scheme of winnable handoff calculating with original mobility, this set up was used in Channel Changeable Set (CCS).  ...  CDMA system has introduced the signal propagation performed and overcast the system.  ...  In this paper, IS95/CDMA2000 is conventional soft handoff is implemented in CDMA cellular systems.  ... 
doi:10.19026/rjaset.7.898 fatcat:prie46bhebb6njsse3pnupi3ry

Performance Evaluation of Spectrum Detection in Cognitive Radio Network

Shubhangi Mahamuni, Vivekanand Mishra
2014 International Journal of Communications, Network and System Sciences  
In mobility management, detection of spectrum hole plays very important role for doing spectrum handoff mechanism.  ...  But in case of reactive spectrum handoff mechanism, spectrum handoff delay becomes tedious task.  ...  It proves that our proposed approach has the improved efficient performance on reducing CR system spectrum handoff delay.  ... 
doi:10.4236/ijcns.2014.711049 fatcat:vzigws3qhnfzjnl2synxbmxmjy

Soft handoffs in CDMA mobile systems

D. Wong, Teng Joon Lim
1997 IEEE personal communications  
This change is known as a handoff. In first-generation cellular systems like the Advanced Mobile Phone System (AMPS) [1, 2] , handoffs were relatively simple.  ...  The control/decision structures have been improved so that in progressing from network-controlled toward mobileassisted handoffs (MAHO) or mobile-controlled handoffs (MCHO), the handoff decision delay  ...  Ltd. for providing information on soft handoffs in the IS-95 standard. The authors also thank the reviewers for their helpful comments. The first author thanks Prof.  ... 
doi:10.1109/98.637378 fatcat:ipm2ntiqmnevhmcrawjbqv3lge

Modeling and Performance Analysis for Soft Handoff Schemes in CDMA Cellular Systems

X. Ma, Y. Cao, Y. Liu, K.S. Trivedi
2006 IEEE Transactions on Vehicular Technology  
Some important characteristics of the cellular configuration in soft handoff systems are used to propose a new design of efficient call admission control (CAC) in CDMA systems.  ...  A new soft handoff scheme-eliminating pseudo handoff calls (EPHC)-is proposed to improve channel utilization efficiency based on mobility information.  ...  CONCLUSION In this paper, a new view of cellular geometry in the CDMA system and a relative mobility algorithm for soft handoff are proposed.  ... 
doi:10.1109/tvt.2005.863347 fatcat:jrl4xussuffublrqgythcy4ej4

A call admission control scheme for packet data in CDMA cellular communications

L. Wang, W. Zhuang
2006 IEEE Transactions on Wireless Communications  
In wireless cellular communication systems, call admission control (CAC) is to ensure satisfactory services for mobile users and maximize the utilization of the limited radio spectrum.  ...  In this paper, we propose a new CAC scheme for a code division multiple access (CDMA) wireless cellular network supporting heterogeneous self-similar data traffic.  ...  ACKNOWLEDGEMENTS The authors would like to thank the anonymous reviewers for their constructive comments which improve the presentation of this paper.  ... 
doi:10.1109/twc.2006.1611064 fatcat:xa2kntrpp5acxmi3cfu73dqkwy

Preserving HTTP Sessions in Vehicular Environments

Yibei Ling, Wai Chen, T. Russell Hsing, Onur Altintas
2007 IEEE Transactions on Vehicular Technology  
In this paper we identify several new issues arising from network heterogeneity in vehicular environments and concentrate on designing and implementing a network-aware prototype system that supports HTTP  ...  and adaptation, (3) application-layer preemptive network handoff.  ...  The adverse effect of handoff upon system performance could become prominent in highly mobile vehicular environments [11] .  ... 
doi:10.1109/tvt.2007.898374 fatcat:lkt2c4kbind7bf6wgjgi22xxdm

High data-rate packet communications for cellular networks using CDMA: algorithms and performance

S. Kumar, S. Nanda
1999 IEEE Journal on Selected Areas in Communications  
In this paper, we describe a scheme for high data-rate packet service using CDMA that addresses all of the above problems and has been standardized in Revision B of IS-95.  ...  The advantages of code division multiple access (CDMA) for cellular voice have become well known, and IS-95-based systems have now been widely deployed.  ...  They also acknowledge the careful comments of all three anonymous reviewers that have helped improve the manuscript.  ... 
doi:10.1109/49.753732 fatcat:n3sifhh24ne6denamsmcbvhdu4

Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Hai Jiang, Weihua Zhuang, Xuemin Shen, Qi Bi
2006 IEEE Journal on Selected Areas in Communications  
With the rapid growth of the Internet, the demand for fast and location-independent mobile multimedia services will be steadily increasing in future IP-based CDMA cellular systems.  ...  Compared with the circuit-switched voice service in the second-generation CDMA systems (i.e., IS-95), heterogeneous multimedia applications in future IP-based CDMA networks require more complex QoS provisioning  ...  For both uplink and downlink of a CDMA system without channel fading, improved performance in system throughput can be achieved by the one-at-a-time scheduling, as indicated in Section II-A.  ... 
doi:10.1109/jsac.2005.858897 fatcat:zebpcprk4vbylodukzlf4oh2hq

IP-based access network infrastructure for next-generation wireless data networks

R. Ramjee, T.F. La Porta, L. Salgarelli, S. Thuel, K. Varadhan, L. Li
2000 IEEE personal communications  
In this paper, we propose a homogeneous IPbased network as a common access network for the different wireless technologies.  ...  The IP-based access network uses the internet standard, Mobile IP, for supporting macro-mobility of mobile hosts and HAWAII for supporting micro-mobility and paging functionality of current wireless networks  ...  Assume that the mobile host illustrated in Figure 4 is idle and goes to standby state.  ... 
doi:10.1109/98.863994 fatcat:n6l2ppj5onha3bitl4dbbge7ma

A New Call Admission Control Scheme Based on Mobile Position Estimation in DS-CDMA Systems

Tuna Tugcu, Cem Ersoy
2005 Wireless networks  
Since subscriber mobility changes in time, the number of handoff attempts in each cell is subject to fluctuations, making static assignments (or periodical update) of a given number of guard channels inefficient  ...  The reservation requests are made according to the recent mobility pattern of the subscriber.  ...  Both idle and call durations are assumed to be exponentially distributed. The means for the idle and call durations vary according to the physical structure and system load.  ... 
doi:10.1007/s11276-005-6616-5 fatcat:lmexzk6ev5bkte323xn6uu7v3a

Guest editorial mobility and resource management in next generation wireless systems

I.F. Akyldiz, D.J. Goodman, L. Kleinrock
2001 IEEE Journal on Selected Areas in Communications  
ACKNOWLEDGMENT We express our thanks to the Editor-in-Chief, W. H. Tranter, and our liaison Editor, C.-T. Lea, for inviting us to edit this special issue and for their continuing keen interest.  ...  The authors further demonstrate that the existence of asynchronous TS overlaps in a TD-CDMA/TDD system does not result in system degradation.  ...  Guest Editorial Mobility and Resource Management in Next Generation Wireless Systems S ECOND GENERATION (2G) wireless systems such as Global System for Mobile communications (GSM), Personal Digital Cellular  ... 
doi:10.1109/jsac.2001.957299 fatcat:72vtjxypdfcwllr2ugr2pp2u3u

Cross-Layer Design and Analysis of Downlink Communications in Cellular CDMA Systems

Jin Yuan Sun, Lian Zhao, Alagan Anpalagan
2006 EURASIP Journal on Wireless Communications and Networking  
Numerical results show the performance gain of each proposed scheme over independent performance of an individual layer in the wireless mobile network.  ...  We are concerned with the role of each single layer as well as the interaction among layers, and propose algorithms/schemes accordingly to improve the system performance.  ...  Soft handoff One of the major benefits of a CDMA system is the ability of a mobile to communicate with more than one base station at a time during the call [23] .  ... 
doi:10.1155/wcn/2006/21297 fatcat:zfqzuxqda5fkhn5aplu5zjd2l4

Evolution of wireless data services: IS-95 to cdma2000

D.N. Knisely, S. Kumar, S. Laha, S. Nanda
1998 IEEE Communications Magazine  
The proposed standard will support a high data rate (64 kb/s) in b o t h directions, t o and f r o m t h e mobile device.  ...  The cdma2000 system includes a greatly enhanced air interface supporting CDMA over wider bandwidths for improved capacity and higher data rates while also maintaining backward compatibility w i t h existing  ...  The figure shows a mobile in soft handoff with two BSs. In soft handoff, the mobile communicates on the fundamental code channel simultaneously with BS1 and BS2.  ... 
doi:10.1109/35.722150 fatcat:mxjwa4mlijasldz6rsd4pjda5u

MCIP: A 3G/IP Interworking System Supporting Inter-Cluster Soft Handoff

Xin Liu, Weihua Zhuang
2006 Wireless personal communications  
In this paper, a novel 3-tier Mobile Cellular IP (MCIP) access network is proposed for interworking between a third generation (3G) wireless cellular system and a wireline Internet Protocol (IP) based  ...  The MCIP hard and soft handoff schemes are compared with the hard handoff schemes used in the Cellular IP and HAWAII access networks.  ...  Soft handoff is supported only by code-division multiple access (CDMA) technology, while hard handoff is applicable in any cellular systems.  ... 
doi:10.1007/s11277-006-9038-5 fatcat:oay2qhqfozfprj3vxkl7f3xnaq

Dynamic sectorization of microcells for balanced traffic in CDMA: genetic algorithms approach

C.Y. Lee, H.G. Kang, Taehoon Park
2002 IEEE Transactions on Vehicular Technology  
The microcell sectorization problem is formulated as an integer linear programming which minimizes the blocked and handoff calls in the network.  ...  In the proposed sectorization proper, connected, and compact sectors are considered to keep the handoffs as small as possible, while satisfying the channel capacity at each sector.  ...  In this paper we examine sectorization of microcells in CDMA system to balance the dynamically changing traffic.  ... 
doi:10.1109/25.992068 fatcat:q6ir25liuzasfd5ruwtfxigpte
« Previous Showing results 1 — 15 out of 414 results