Random access preamble coding for initiation of wireless...

Details Random access preamble coding for initiation of wireless... Random access preamble coding for initiation of wireless...

2007-02-06

2007-02-06

Vu, Huy D. (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S342000, C370S441000

Reexamination Certificate

active

09591888

ABSTRACT:
A method of operating a wireless communications unit (UE) to request a connection with a base station (10) is disclosed. The wireless unit (UE) receives a signal from the base station (10) indicating at least one time slot within which a preamble may be transmitted by the wireless communications unit (UE). The wireless unit (UE) selects one of a plurality of orthogonal codes (hi) for the preamble and generates a spread code using the selected orthogonal code. The spread code (70) is arranged as a symbol (hi) of the selected code, repeated a selected number of repetitions. The wireless unit (UE) transmits the preamble signal corresponding to the spread code to the base station (10).

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