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(普通问题)
提问者:
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• 某地在MME割接过程中出现了切换成功率下降，从指标看是切换准备失败增多，成功率下降到约60%，不是个别小区。Calltrace信令流程如下，在切换准备时目标ENB发HOPrepaRATion Fail 2015-02-03
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• 针对LTER8终端，重选到比服务小区优先级低的E-UTRAN频点或RAT系统的小区上的条件包括下述哪些？（） 2017-08-29
• 电路域无排队RAB指配建立失败的RAB数目,无线网络层原因-release due to utran geneRATed reason(个),这个原因值突然增多，是什么导致，无top小区 2016-11-07
• 某地在MME割接过程中出现了切换成功率下降，从指标看是切换准备失败增多，成功率下降到约60%，不是个别小区。Calltrace信令流程如下，在切换准备时目标ENB发HOPrepaRATion Fail 2015-02-03
• RAT间测量特定门限值和RAT间小区重选测量门限值的区别是什么？ 2014-03-07
• 重选算法异RAT小区测量门限为13db，T网小区信号为多少时测量GSM小区 2013-10-04
• “out_inter_bsc_ho_success_RATe”应该是BSC间的切换，且是从源小区切向目标小区吧？ 2011-06-04
• LAPD ConcentRATion 三个载波小区的语音与信令且Confact为4，则需要PCM链路的多少个时隙？ 2010-02-21
问题答案
( 2 )
RAT是 radio acess technology无线接入技术的缩写
异RAT小区，是指采用不同无线接入技术的小区，eg : TD-SCDMA 和WCDMA, WCDMA和GSM都是异RAT小区
异RAT小区，是指采用不同无线接入技术的小区，eg : TD-SCDMA 和WCDMA, WCDMA和GSM都是异RAT小区
回答者：
jasminesxxf
回答时间：2009-04-17 16:09
5
1
RAT：Radio Access Technology同RAT小区，就是指无线接入技术相同的小区；
异RAT小区，就是无线接入技术不同的小区；
常见的接入技术有GSM,CDMA,WCDMA,TD-SCDMA,LTE等等
异RAT小区，就是无线接入技术不同的小区；
常见的接入技术有GSM,CDMA,WCDMA,TD-SCDMA,LTE等等
无畏布衣 2011-05-03 15:11
即是開啟3G & 2G的neighbor關係, 可以讓3G,2G彼此handover or cell reselection , 稱為IRAT .
Inter-Radio Access Technology Cell Change (IRATCC) handles the Cell Change and Cell Reselection of a UE in connected state to and from a GSM/GPRS system. The IRATCC handles the Cell Change and Cell Reselection when the UE is connected to a Packet-Switched service.
Once the evaluation carried by the Inter-Rat Handover Evaluation algorithm has lead to a proposed GSM/GPRS cell, Inter-RAT Cell Change Execution is enabled if the UE is connected to a Packet-Switched service, and the Inter-RAT Cell Change execution part starts. The result of the execution part is one of the following:
• The UE, in CELL_DCH state, changes cell and continues connected to a Packet-Switched service in the new GSM/GPRS cell.
• The UE, in CELL_FACH state, reselects cell and the UE contacts the new GSM/GPRS system.
• The UE remains in the WCDMA RAN connected to a Packed-Switched service, due to Inter-RAT Cell Change failure.
Inter-Radio Access Technology Cell Change (IRATCC) handles the Cell Change and Cell Reselection of a UE in connected state to and from a GSM/GPRS system. The IRATCC handles the Cell Change and Cell Reselection when the UE is connected to a Packet-Switched service.
Once the evaluation carried by the Inter-Rat Handover Evaluation algorithm has lead to a proposed GSM/GPRS cell, Inter-RAT Cell Change Execution is enabled if the UE is connected to a Packet-Switched service, and the Inter-RAT Cell Change execution part starts. The result of the execution part is one of the following:
• The UE, in CELL_DCH state, changes cell and continues connected to a Packet-Switched service in the new GSM/GPRS cell.
• The UE, in CELL_FACH state, reselects cell and the UE contacts the new GSM/GPRS system.
• The UE remains in the WCDMA RAN connected to a Packed-Switched service, due to Inter-RAT Cell Change failure.
回答者：
snoopy63851
回答时间：2009-04-17 17:39
5
7
Radio Access Technology 无线接入技术
Radio Access Type 无线接入类型
平常遇到的异RAT就是异系统的意思，如GSM
Radio Access Type 无线接入类型
平常遇到的异RAT就是异系统的意思，如GSM
miaoquchina 2012-05-07 10:42
RAT小区，可理解为同频小区，通常出现在小区切换。
白色的彩虹 2017-03-27 13:08
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