Download Antenna Compendium Volume 1 by American Radio Relay League PDF

By American Radio Relay League

The superior quantity in ARRL's renowned Antenna Compendium sequence contains articles on a multiband moveable, quads and loops, baluns, the Smith Chart, and extra.

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10 Traffic in a high congestive situation. 11 CSSR in a high congestive situation. As the data was thoroughly analyzed, both at a network and BSC level and for large- as well as low-scale events, we observe that these counters were following one another; in other words, one was triggering the other. A rapid increase of traffic caused a serious increase in the TCH and SDCCH BRs, thus triggering dramatic degradation of CSSR and HOSR. As the study was extended to other counters and indicators, it was observed that they followed the same pattern.

Once again the system can accommodate the offered traffic, as long as the requests do not reach the instability threshold. After the system reaches that, the BR increases dramatically and is more than 30%. 24, the increase of DCR is depicted, while call requests reach the threshold. This can be observed in all congestion situations, where the blocking probability and all other (chain) effects are increasing rapidly after a specific value. 23 TCH blocking—TCH call requests. 25, shows that the chain effect influences the handover performance, since handover requests cannot be handled due to the traffic overload in the target cell.

3 Traffic Modeling Traffic engineering and modeling in communication networks is very important since it allows us to better understand the network’s behavior under various conditions and thus to better organize its operational deployment and usage—or in other words to match the demand for traffic with what the network offers. A the same time traffic engineering and modeling in mobile communication networks apart from being important it is also a very complex and difficult procedure because of the nature of wireless communications.

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