Requirements of a Carrier-Grade System

With the coming of age of packet-switched technology in preference to circuit-switched connections, many network systems are already based on soft-switch architecture. The fundamental concept in this architecture is that switching happens mostly in software. The role of software was previously minimal because switching used to happen in hardware. Connection circuits used to be established [...]

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Logical Channel Multiplexing in WCDMA MAC

Multiplexing at any level is a way of life because there is great deal of sense in doing it. In protocol engineering, people have long realized that packet-switched networks offer much better network capacity utilization than circuit-switched networks. In CS connections, the link or trunk is reserved for the entire duration of the call. Periods [...]

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MoDeMo Bangalore, 16-Dec-07

On a cold but bright Sunday morning when the world preferred to stay in bed a little longer than usual, a bunch of mobile enthusiasts gathered at the office of ThoughtWorks in Bangalore. People as far Shimla and Cochin came for this open meeting that was free, productive and executed with minimal fuss. Having it [...]

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Power Control in HSPA

Last week I wrote about UMTS power control with reference to R99 channels. Today’s post continues the discussion with reference to HSDPA and HSUPA.
Let us begin with HSDPA for which power control is significantly different from R99 channels. HSDPA does not have fast power control as in R99 DL DPCH. However, power control is just [...]

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