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In order to solve the problem of cooperative issue in single frequency network (SFN) positioning system, in this paper, a cooperative positioning scheme using the fundamental characteristic of SFN is proposed. Some different signal levels are described for cooperative signal selection. According to the difference between the cooperative signal levels, the proper signal can be selected for cooperative...
Presently, public traffic system mainly depends on driver's manual operation, which will inevitably encounter many problems such as punctuality of the bus's arrival on bus station. Paper proposes an supervisory system based on GPRS and ZigBee technology, to improve the operation efficiency of bus monitoring system and realize intelligent transportation system. Paper introduces the bus monitoring system...
In this paper, IP mobility management protocols have been analyzed and compared in terms of handover latency and packet loss during handover management. Numerical results show that FHMIPv6 outperforms other protocols in the case of packet loss and handoff latency. Effect of L2 triggering time, packet arrival rate and average queuing delay at access router on handoff latency and packet loss have been...
In this paper, we present a new distance and velocity assisted handoff decision algorithm (DVAH). By sampling the received power from base station (BS) continually and with the beforehand downloaded base station coverage radius and some propagation parameters, the mobile terminal (MT) can estimate the distance and the leaving velocity from surrounding BSs. By the assistance of the estimated distance...
With the rapidly developed wireless techniques, many wireless networks are deployed with widely varying characteristics. In order to fully utilize the complementary heterogeneous networks, the mobile terminal (MT) may handoff from one network to another by many subjective or objective reasons. The handoff process can be divided by three parts. Firstly, select the best network among different available...
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