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What is WCDMA
Number of View: 64Code Separation WCDMA (Wideband Code Division Multiple Access) is the radio access method used in WCDMA RAN. The radio access method separates users in a cell by codes, rather than...
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WCDMA Frequency Reuse
Number of View: 102The frequency reuse in WCDMA RAN is one, 1. This means that all cells can use the same 5 MHz for frequency band or uplink and the same 5 MHz for downlink One operator will probably...
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WCDMA Power Control
Number of View: 76Solve Interference Problems Power control is mainly done to solve the problem of interference when one mobile user is closer to the receiver than the other, the so-called Near-Far...
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WCDMA Handover
Number of View: 100Soft Handover Thanks to the fact that neighboring cells have the same frequency, the mobile call can be handed over between Base Stations without interrupting the call (figure...
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What is benefit of shorter TTI in HSDPA
Number of View: 1361)After every TTI the resources can be redistributed among the users. Therefore, the resource usage is more efficient. 2)each UE reports about the channel quality after every TTI by...
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What is Difference between ARQ and HARQ
Number of View: 104ARQ (Automatic Repeat Request), which is used in UMTS, a package received in error will be discarded and a retransmission will be requested. If the retransmission is also erroneous,...
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How to identify Pilot Pollution
Number of View: 330In idle or cell_FACH mode, phenomenon of the pilot pollution is that a UE cannot firmly camp on a cell at one location because of receiving many pilot channels with similar quality...
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what is RSCP or Received Signal Code Power
Number of View: 126RSCP The "Received Signal Code Power" (RSCP) is the collected RF energy after the correlation / descrambling process, usually given in dBm. Only this code power is of interest for...
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what is Ec/Io
Number of View: 122Ec/Io This is the ratio of the received energy per chip (= code bit) and the interference level, usually given in dB. In case no true interference is present, the interference level...
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what is RSSI
Number of View: 108RSSI The Received Signal Strength Indicator (RSSI) is a value that takes into account both RSCP and Ec/I0. It is usually given in dBm and can be calculated as follows: RSSI [dBm] =...
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