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ABSTRACT: Based on IEEE 802.15.4 standard for Low-Rate Wireless Personal Area Network (LR WPAN), this paper proposes a frame size adaptive
Medium Access Control (MAC) protocol. Mean Burst length and mean Gap between bursts are measured by using training frames
between two communication de-vices. With the mean Burst and Gap values, an optimal MAC frame size to meet the required FER
is calculated. During communication period, FER is periodi-cally measured in a transmitting device. If the measured FER is
lower than the required FER, MAC frame size is increased, else vice versa. Thus, channel re-sources can be more effectively
utilized by sending optimal bits into one trans-mission frame. The proposed scheme is evaluated under various wireless chan-nel
conditions in terms of the achieved throughput. Simulation results show that the proposed scheme achieves a much higher throughput
than a non-frame size adaptive MAC protocol in LR WPAN does.
11/2006: pages 296-305;
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Information Networking, Advances in Data Communications and Wireless Networks, International Conference, ICOIN 2006, Sendai, Japan, January 16-19, 2006, Revised Selected Papers; 01/2006
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ABSTRACT: The traffic model for the channel assignment scheme based on cell
partitioning (CASCP) is proposed. CASCP is the scheme in which different
CDMA channels control different sub-areas of a cell area. The sub-area
for each CDMA channel is varied according to traffic conditions, those
are user velocity, the probability of user moving and interference from
sub-area of other cells. CASCP increases the probability of soft
handover between cells. We use a simple and accurate approximating
method for deriving the channel holding time distribution by a numerical
integration approach. We analyze the effects of user mobility on the
system performance and compare the performance in terms of handover
attempts rate, mean channel holding time, and traffic density
Communications, 2000. ICC 2000. 2000 IEEE International Conference on; 02/2000
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ABSTRACT: An analytical traffic model is presented to estimate the soft
handoff rate in DS-CDMA cellular systems. The model is based on the fact
that a mobile in soft handoff call is connected to two cell sites when
it is in an overlapped region. The handoff rate is estimated by the
mobility of mobiles, which is a function of the size and shape of a cell
area, the call density and speed of mobiles in the area. Simulation
results show good agreement with the analytical model
Universal Personal Communications Record, 1997. Conference Record., 1997 IEEE 6th International Conference on; 11/1997
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ABSTRACT: This paper presents a fault effect assessment architecture of an advanced intelligent network for monitoring service operation status by using a damage assessment method. The fault effect assessment architecture has three types of management domains-physical, logical, and functional object layer. Each domain is closely correlated by the damage assessment model used to estimate the deterioration level of the network functionality when physical network entities are faulty. The purpose of this paper is to achieve the enhanced fault management of not only the network entities but also the network functionality by applying a damage assessment concept to the area of intelligent network fault management
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on; 10/1997
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ABSTRACT: In mobile telephone systems it is required to manage radio cells in order to provide the ability of network operators to efficiently supervise, interrogate, and control them. This leads to the introduction of the cell management of mobile telephone systems. We apply object-oriented data modeling techniques to the design of CDMA radio network management oriented to the cells. In this paper we propose the managed object model for the cell management of base transceiver subsystem of CDMA systems. We describe the BTS cell management objectives and the object modeling processes. We also discuss the cell management features of the object model that are divided into power control, handoff control, configuration, and fault management features. The emphasis is put on the management aspects of CDMA power control and handoff control
Personal, Indoor and Mobile Radio Communications, 1996. PIMRC'96., Seventh IEEE International Symposium on; 11/1996
