Transport and physical channels
Réseaux cellulaires

Transport channels are based on physical channels, organized as shown in figure 25. In addition to the physical channels that support transport channels, there are a few special physical channels that carry information specific to the physical layer and are transmitted by each base station:

• synchronization channel (SCH) ;

• common pilot channel (CPICH) ;

• acquisition indication channel (AICH) ;

• messaging indication channel (PICH) ;

• CPCH status indication channel (CSICH) ;

• collision detection channel and channel allocation indicator (CD/CA-ICH).