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High-Tech Dictionary >>
Word Definition
Rician PDF
Rician PDF is a type of signal fading caused by independent multipath signals. The Rician PDF reduces to the Rayleigh PDF for the special case when s = 0.
RLC: Radio Link Control
Radio Link Control (RLC) is a link-layer protocol that is responsible for error recovery and flow control in 3G (UMTS) cellular systems. Compared with its counterpart developed for CDMA-2000 systems, i.e., Radio Link Protocol (RLP), RLC is a more advanced protocol and can support different QoS requirements desired by the users.
RLP: Radio Link Protocol
Radio Link Protocol (RLP) is a link layer protocol used for 2G (GSM and cdmaOne) and CDMA-2000 (3G) network-based error corrections to ensure robust data transmission. RLP terminates at the Mobile Station (MS) and the Interworking Function (IMF) generally located at the Mobile Switching Centre (MSC). Cellular networks such as GSM and CDMA use different variations of RLP.
RNC: Radio Network Controller
The Radio Network Controller (RNC) is the governing element in the UMTS radio access network (UTRAN) responsible for control of the Node Base Stations (BS), that is to say, the base stations which are connected to the controller. The RNC carries out radio resource management, some of the mobility management functions and is the point where encryption is done before user data is sent to and from the mobile. The RNC connects to the Circuit Switched Core Network through Media Gateway (MGW) and to the SGSN (Serving GPRS Support Node) in the Packet Switched Core Network. There are three types of RNCs: C-RNC (Controlling RNC), D-RNC (Drift RNC) and S-RNC (Serving RNC).
Roaming
Roaming refers to the movement of a mobile device from one wireless network location to another without interruption in service or loss in connectivity. When a call is made to a roaming mobile, the public telephone network will route the call to your service provider's network since that is where your phone number terminates. Your home network is then responsible for re-routing the call to the host network.
Rogue Access Point
Rogue Access Point is an unauthorized access point installed on a network that may provide an entry point for unauthorized network access.
RPC: Reverse Power Control
Reverse Power Control (RPC) is a method for a Wireless Local Loop (WLL), in which the number of times of power control value transmission is reduced to 1. RPC reduces unnecessary power consumption in the WLL system and improves the reliability of the communication system.
RPE-LTP: Regular Pulse Excited-Long Term Predictio
Regular Pulse Excited Long Term Prediction (RPELTP) is a type of speech coding using regularly spaced pulses in an excitation frame and a long-term predictor to model the fine structure (pitch).
RRS: Round Robin Scheduling
Round Robin Scheduling (RRS) is a scheduling scheme used in wireless network. Since many stations share one channel in a wireless network, this algorithm provides every station to transmit or receive on the shared channel at a regular interval. Round-robin is one of the simplest scheduling algorithms for processes in an operating system, which assigns time slices to each process in equal portions and in order, handling all processes without priority. Round-robin scheduling is both simple and easy to implement, and starvation-free. Round-robin scheduling can also be applied to other scheduling problems, such as network scheduling.
RRC: Radio Resource Control
Radio Resource Control (RRC) is a sublayer of Layer 3 on the UMTS 3G radio interface. RRC exists in the control plane only and provides information transfer service to the NAS (Non Access Stratum). RRC is responsible for controlling the configuration of UMTS radio interface Layers 1 and 2.
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Word : log-in
Explanation : The account name used to access a computer system. Contrast with log in
 
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Tech Word for Today
 Word : thrival
 Explanation : Beyond survival is the idea of thriving or prospering in the new millennium. In addition to survival
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