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RAT小区，异RAT小区是什么意思？
RAT小区，异RAT小区是什么意思？
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问题答案
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
16
2RAT：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
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
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
RAT小区，可理解为同频小区，通常出现在小区切换。
