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Multi-carrier code-division multiple access (MC-CDMA) is a multiple access scheme used in OFDM-based telecommunication systems, allowing the system to support multiple users at the same time over same frequency band. MC-CDMA spreads each user symbol in the frequency domain.
Asynchronous CDMA has some level of privacy built in because the signal is spread using a pseudo-random code; this code makes the spread-spectrum signals appear random or have noise-like properties. A receiver cannot demodulate this transmission without knowledge of the pseudo-random sequence used to encode the data.
Removable User Identity Module (R-UIM, usually pronounced as "R-yuim") is a card developed for cdmaOne/CDMA2000 ("CDMA") handsets that extends the GSM SIM card to CDMA phones and networks. To work in CDMA networks, the R-UIM contains an early version of the CSIM application. The card also contains SIM (GSM) application, so it can work on both ...
RAN – Radio Access Network – See AN. Restrictive Mode – See PRL. RFC – Request For Comments RN – Radio Network – See AN. RoamEx. Roaming. Roaming Agreement. Roaming Indicator. RSP – Roaming Service Provider RUIM – Removable User Identity Module RVR – Roamer Verification and Reinstatement
The serving network provides the mobile device access authentication mechanism. The exact method employed depends upon the type of service being used: CAVE-based Authentication – Used for access authentication in CDMA/1xRTT; AKA – 3G successor to CAVE-based authentication; A12 Authentication – Used for access authentication in 1xEV-DO
These including some CDMA handsets - making a GSM gateway to a CDMA network. Computer security researcher Chris Paget reported [7] that a handheld device, such as an Android phone, could act as a gateway base station to which handsets can connect; the Android device then connects calls using an on-board Asterisk server and routes them to the ...
cdmaOne network structure. The IS-95 standards describe an air interface, [1] a set of protocols used between mobile units and the network. IS-95 is widely described as a three-layer stack, where L1 corresponds to the physical layer, L2 refers to the Media Access Control (MAC) and Link-Access Control (LAC) sublayers, and L3 to the call-processing state machine.
The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM -based CDMA devices, the PRL resides on the R-UIM .