GPRS业务重选的影响因素有哪些？

The MS shall then check whether: i) The path loss criterion (C1) for current serving cell falls below zero for a period of 5 seconds. This indicates that the path loss to the cell has become too high. ii) The calculated value of C2 for a non-serving suitable cell exceeds the value of C2 for the serving cell for a period of 5 seconds, except; a) in the case of the new cell being in a different location area or, for a GPRS attached MS, in a different routing area or always for a GPRS attached MS in GMM Ready state (A/Gb mode) or RRC-Cell_Shared state (Iu mode) in which case the C2 value for the new cell shall exceed the C2 value of the serving cell by at least CELL_RESELECT_HYSTERESIS dB as defined by the BCCH data from the current serving cell, for a period of 5 seconds; or b) in case of a cell reselection occurring within the previous 15 seconds in which case the C2 value for the new cell shall exceed the C2 value of the serving cell by at least 5 dB for a period of 5 seconds. This indicates that it is a better cell. 参考资料：GSM协议规范ts_145008v090400p




翻译过来粗略点说就是：考虑C1C2CRH，考虑C2就含CRO/PTTO了

重选偏置和惩罚时间等参数都是在计算C32参数是应用的,单纯的GPRS重选应该只是考虑C2算法和CRH,

重选是MS行为，考虑C1、C2、CRO、CRH、PT、TO就可以了

这个我还真不知道，那将小区CRH修改小，如14DB修改为10DB，是不是能吸收更多数据业务

控制小区的重选的参数，不一样的是GPRS只考虑C2和CRH

A， 无主覆盖小区，信号不稳定
 
B， BCCH载频故障，或者传输故障
 
C， CRO设置过大，导致C2值偏高，手机重选过去，实际电平比较低切换至问题载频上
 
D， 邻区关系丢失，导致小区重选
 
E， 切换至问题载频上
 
F， 位置更新导致重选至电平低小区
 
G， 干扰，导致切换至其他小区，电平较低