R - ReselectionThe process made by a mobile whilst in the UMTS idle state or one of the paging states. The term R(s) is used for the calculation on the serving cell,... View more
R Reference PointThe R Reference Point lies between non ISDN equipment and a TA (Terminal Adapter). ... View more
r-csch - reverse-common signaling logical channelA logical channel that carries higher layer signaling traffic from the user to the BS (Base Station) over a common physical channel. ... View more
r-dsch - reverse-dedicated signaling logical channelA logical channel that carries higher layer signaling traffic from the BS (Base Station) to the user over a common physical channel. ... View more
R-UIM - Removable User Identity ModuleThe R-UIM is a removable variant of a UIM (User Identity Module) which can be physically removed from a ME (Mobile Equipment) and inserted into anothe... View more
R2MFC - R2 Multi Frequency CompelledCCS (Common Channel Signalling) system that allows the equipment units at the exchanges to send and receive digits. ... View more
RA - Rate AdaptationThe Rate Adaptation process takes place when a slow device is connected to an ISDN (Integrated Services Digital Network). Rate Adaptation is required ... View more
RA - Registration AuthorityAn RA (Registration Authority) may be used in PKE (Public Key Encryption) to support the distribution and management of keys and tokens along with oth... View more
RA - Routing AreaThe SGSN (Serving GPRS Support Node) in a GPRS system will control one or more RA (Routing Area). It is the responsibility of the mobile to keep the S... View more
RA-RNTI - Random Access – Radio Network Temporary IdentifierAs part of the E-UTRA access procedure the UE will probe the system with Random Access Preambles. On receiving these the eNB generates a RA-RNTI to ef... View more
RAA - Re-Authorization AnswerThe RAA is a Diameter credit control command. In LTE, the message is sent by the PCEF to the PCRF across the Gx interface in response to the Re-Author... View more
RAB - Radio Access BearerTerm used in UMTS to identify the service the AS (Access Stratum) provides to the NAS (Non Access Stratum) for transfer of user data between the UE (U... View more
RAC - Routing Area CodeRouting Area Code is a fixed length of 1 octet and identifies a routing area within a location area. The RAC is part of the RAI (Routing Area Identity... View more
RACH - Random Access ChannelThe channel used for initial access into a system. The RACH function is different depending on the technology of the system. The term RACH applies to ... View more
RAck - Response AcknowledgedRAck is a SIP (Session Initiation Protocol) header field which is used in support of the PRACK method. ... View more
RACS - Resource and Admission Control SubsystemThe RACS is an integral part of the TISPAN architecture, designed to allow user devices to request and reserve resources in the access network, essent... View more
Radio Access ModeIdentifies the access mode for a cell. This usually indicates FDD (Frequency Division Duplex) or TDD (Time Division Duplex) mode of access. ... View more
Radio BlockThis is a GPRS term used to describe four consecutive normal bursts containing one RLC (Radio Link Control) / MAC (Medium Access Control) block. This ... View more
Radio Configuration ClassA term used to identify a group of RC (Radio Configuration). The RC (Radio Configuration) for forward and reverse traffic channels, are divided into t... View more
Radio frameDepending on the technology, a radio frame is a numbered time interval used for data transmission on the radio physical channel. ... View more