Physical random access channel frame structure and realization

摘要

New PRACH frame structures and methods for implementing such structures for use in mobile communication systems are disclosed. The PRACH frame structures can include a lengthened message portion. A system can broadcast the PRACH message portion length N in individual cells from a based station. If access condition is satisfied, a user equipment can encode, multiplex and modulate original message bits according to the broadcasted message portion length. The modulated PRACH signals can then be sent to the base station to be demodulated according to the broadcasted message portion length.