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HSDPA adds a new downlink channel to send data to 3G users. This channel is shared by all users within the same cell and is dynamically allocated among them.
Additional intelligence is added to the network to manage the channel at each instant in time, and a variety of techniques are used to improve response times and accuracy.
The shared channel is managed by the network's Node B, the base station that communicates with the mobile handset. Powerful algorithms are used to determine the optimum allocation at any time.
These algorithms require extensive processing power and rely on field experience for accuracy. Alcatel's and Fujitsu's Node Bs are top-of-class for processing power, and draw on NTT DoCoMo's unequalled field experience. |
