# GTP - [[GPRS - General Packet Radio Service|GPRS]] Tunnelling Protocol [[GTP - GPRS Tunnelling Protocol]] is a group of [[IP - Internet Protocol|IP]]-based communications protocols used to carry [[GPRS - General Packet Radio Service]] within [[GSM - Global System for Mobile communication|GSM]], [[UMTS - Universal Mobile Telecommunications Service|UMTS]], [[LTE - Long Term Evolution|LTE]] and [[5G NR - New Radio|5G NR]] radio networks. In [[3GPP - 3rd Generation Partnership Project|3GPP]] architectures, [[GTP - GPRS Tunnelling Protocol|GTP]] and Proxy Mobile IPv6 based interfaces are specified on various interface points.