| RAB |
Radio Access Bearer |
|
| RACE |
Research in Advanced Communications Equipment |
|
| RACH |
Random Access Channel |
The channel used by mobiles in GSM and W-CDMA systems to attempt to gain access to the system when first attaching to it. |
| radio port |
|
The T1P1 PCS architecture model equivalent to the BTS. |
| RAN |
Radio Access Network |
|
| random access |
|
A technique for radio access to a network where an access message is not coordinated or administered by the network and can collide with other attempts by others to access the network over the same channel. |
| Rayleigh fading |
|
A type of signal fading caused by independent multipath signals having a Rayleigh PDF. |
| RC |
Radio Configuration |
RC defines the physical channel configuration of cdma2000 (IS-2000) signals. Each RC specifies a set of data rates based on either 9.6 or 14.4 kbps. RC1 is the backwards-compatible mode of cdmaOne for 9.6 kbps voice traffic. It includes 9.6, 4.8, 2.4, 1.2 kbps data rates and operates at Spread Rate 1 (SR1). RC3 is a cdma2000 specific configuration based on 9.6 kbps that also supports 4.8, 2.7, and 1.5 kbps for voice, while supporting data at 19.2, 38.4, 76.8, and 153.6 kbps. RC3 also operates at SR1. For more information see Agilent application note "Performing cdma2000 Measurements Today". |
| REAG |
Region |
A geographic area over which a WCS operator is licensed to provide service. REAGs are a group of economic areas (EAs) and were first used to license WCS service in the late '90s. REAGs are very large, with 6 REAGs covering the entire continental United States. |
| receive diversity |
|
The process of providing two independent receiving systems and spatially separated antennas to overcome fading effects on the radio signal. |
| registration |
|
This is the process by which a mobile station informs the immediate service provider of its presence in the network and its desire to receive service. |
| Repeater |
|
Receives radio signals from the base station. They are then amplified and re-transmitted to areas where radio shadow occurs. Repeaters also work in the opposite direction, i.e. receiving radio signals from mobile telephones, then amplifying and re-transmitting them to the base station. |
| reuse factor |
|
Also known as frequency reuse factor, is the number of distinct frequency sets used per cluster of cells. |
| RF |
radio frequency |
Electromagnetic waves in the frequency range of 30 kHz to 300 GHz. [2] |
| RNC |
Radio Network Controller under the UMTS system. |
A complex network element of the RAN that connects to and co-ordinates as many as 150 base stations in W-CDMA systems. It is involved in managing activities such as hand-over of active calls between base stations. |
| Roaming |
|
Within your home network, this means that your mobile phone automatically sets up communication procedures with different radio base stations when on the move. International roaming means that you can use networks other than your own when traveling abroad. |
| Router |
|
A data switch that handles connections between different networks. A router identifies the addresses on data passing through the switch, determines which route the transmission should take and collects data in so-called packets which are then sent to their destinations. |
| Routing |
|
The forwarding of data packets in packet-switched networks, to the intended address. |
| RPE-LTP |
Regular Pulse Excited-Long Term Prediction |
A type of speech coding using regularly spaced pulses in an excitation frame and a long term predictor to model the fine structure (pitch). |
| RSA |
Rural Service Area |
A geographic area over which a cellular operator is licensed to provide service. RSAs are a group of rural counties having common financial, commercial and economic ties and were used to license cellular service Rural areas in the latter '80s. RSAs cross state lines in some instances and were developed during a public rule making process at the FCC in 1987 and 1988.. |
| RSSI |
Received Signal Strength Indication |
|
