3.7.2 Iur-g 接口
为了使二代网络和三代能更好的互通，3GPP GERAN(GPRS EDGE RAN)工作组提出了增加BSC 和RNC 之间的接口，称之为Iur-g。该接口的位置如下图所示。
一种支持该接口的解决方案是在Iur 接口增加关于GERAN 的信令消息或消息元素。目前 Iur-g 接口的提案及详细的解决方法正在进行中。
参考文献：
3GPP Technical Specification 25.401, UTRAN Overall Description
3GPP Technical Specification 25.402, Synchronization in UTRAN Stage 2
3GPP Technical Specification 25.410，UTRAN Iu Interface: General Aspects and Principles
3GPP Technical Specification 25.411，UTRAN Iu interface Layer 1
3GPP Technical Specification 25.412，UTRAN Iu interface signalling transport
3GPP Technical Specification 25.413，UTRAN Iu interface RANAP signaling
3GPP Technical Specification 25.419，UTRAN Iu-BC interface: Service Area Broadcast Protocol (SABP)
3GPP Technical Specification 25.420，UTRAN Iur Interface: General Aspects and Principles
3GPP Technical Specification 25.421，UTRAN Iur interface Layer 1
3GPP Technical Specification 25.422，UTRAN Iur interface signalling transport
3GPP Technical Specification 25.423，UTRAN Iur interface RNSAP signalling
3GPP Technical Specification 25.430，UTRAN Iub Interface: General Aspects and Principles
3GPP Technical Specification 25.433，UTRAN Iub interface NBAP signalling
3GPP Technical Specification 25.435，UTRAN Iub interface user plane protocols for CCH data streams
3GPP Technical Specification 25.442, UTRAN implementation-specific O&M transport
3GPP Technical Report 25.834, UTRA TDD low chip rate option; Radio protocol aspects
3GPP Technical Report 25.883，Direct Transport Bearers Between SRNC and Node-B
3GPP Technical Report 25.875，NAS node selector function
3GPP Technical Specification 25.305，5 User Equipment (UE) positioning in Universal Terrestrial Radio Access Network (UTRAN); Stage 2
3GPP Technical Specification 23.271，Functional stage 2 description of location services (LCS)
