Wednesday, November 4, 2009

Physical , Transport and Logical Channels

Physical Channels:

Each Channel is ideentified by Frequency, Spreading Code, Scrambling Code and phase of Signal

Dedicated Physical channels identifies UE by SF and Scrambling Code

Transport Channels:
Unidirectional virtual channels mapped to physical channels
Not interested in content (user traffic or control info) , but only cares about Radio Resource

Logical Channels:
Uni and Bi-Directional
Provides bearer for information exchange between MAC and RLC
Focus on type of information means is traffic types is of Dedicated or Common

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