Radio InterfaceThe radio interface is the wireless interface between two points. This term encompasses all the functionality required to maintain such interfaces. In... View more
Radio linkRadio link In a UMTS system, the term radio link is a logical association between single UE (User Equipment) and a single UTRAN (UMTS Terrestrial Radi... View more
Radio link additionThe procedure in UMTS where a new radio link is added to the active set. ... View more
Radio link removalThe procedure in UMTS where a radio link is removed from the active set. ... View more
Radio SpectrumThe range of frequencies used, for example, for broadcasting radio, PMR (Private Mobile Radio), terrestrial television, cellular mobile networks and s... View more
RADIUS - Remote Authentication Dial-In User ServiceRemote Authentication Dial-In User Service is a system of distributed security that secures remote access to networks and network services against una... View more
RAF - Repository Access FunctionThe RAF is used to interwork the standardized XML based GUP (Generic User Profile) Server interface to the GUP data repositories, as specified by the ... View more
RAI - Routing Area IdentificationThe Routing Area Identification is composed of the LAC (Location Area Code) and the RAC (Routing Area Code). It is used for paging and registration pu... View more
Rake ReceiverThe rake receiver is a technique which uses several baseband correlators to individually process multipath signal components. The outputs from the dif... View more
RAM - Random Access MemoryRandom Access Memory is the place in a computer where the operating system, application programs, and data currently in use are kept so that they can ... View more
RAN - Radio Access NetworkThe Radio Access Network performs the radio functionality of the network, as well as providing the connection to the CN (Core Network). The RAN typica... View more
RANAP - Radio Access Network Application PartRANAP operates over the Iu-PS interface and provides two main functions; the support of AS (Access Stratum) signalling between the RNC and the SGSN an... View more
RAND - Random NumberA number selected from a known set of numbers in such a way that each number in the set has the same probability of occurrence. This is typically used... View more
RANDBS - Base Station Random VariableThe RANDBS is a 32bit random number generated by the MS (Mobile Station) for authenticating BS (Base Station) orders to update the SSD (Shared Secret ... View more
RANDC - Random ChallengeA MS (Mobile Station) parameter used in conjunction with the SSD (Shared Secret Data) and other parameters, enabling validation of calls and registrat... View more
RANDU - Unique Random VariableA 24bit random number generated by the BS (Base Station)when carrying out the Unique Challenge-Response procedure. ... View more
RAPID - Random Access Preamble IdentifierThis is used by the E-UTRA MAC layer and relates to the 6bit access preamble identifier which was initially used by a UE accessing the eNB on the PRAC... View more
RAR - Random Access ResponseThis is used by the E-UTRA MAC layer. It contains the TA (Timing Alignment) information, initial UL grant and assignment of a Temporary C-RNTI to the ... View more
RAR - Re-Authorization RequestThe RAR is a Diameter credit control command. In LTE, the message is sent by the PCRF to the PCEF across the Gx interface in order to provision PCC/Qo... View more
RARP - Reverse Address Resolution ProtocolReverse Address Resolution Protocol is a protocol by which a physical machine in a LAN (Local Area Network) can request to learn its IP address from a... View more