Performance analysis of handoff algorithm using relative RSS measurements and random direction-lock in GSM-R
Y. Li, Yu Yan · 2009
It's evaluated in GSM-R that the proposed handoff algorithm using relative RSS measurements and random direction-lock. Due to the single layer and linear cell deployment in GSM-R, the target cell of the call produced by the train driver is usually definite along the railway trajectory. So, the handoff, whose direction is consistent with the train's running direction, occurs only if the relative RSS (Received Signal Strength) measurement exceeds the pre-defined hysteresis; but, the handoff, whose direction is inconsistent with the train's running direction, occurs when not only the relative RSS measurement exceeds the pre-defined hysteresis, but also the random direction-lock is open. Finally, it's found that the proposed handoff algorithm could reduce the average number of handoffs about 25%, compared with the conventional handoff algorithm with a sole hysteresis.