Random access preamble coding for initiation of wireless mobile communications sessions
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United States of America Patent
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Feb 6, 2007
Issued Date -
N/A
app pub date -
Jun 9, 2000
filing date -
Jun 11, 1999
priority date (Note) -
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status (Latency Note)
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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 (h.sub.i) for the preamble and generates a spread code using the selected orthogonal code. The spread code (70) is arranged as a symbol (h.sub.i) 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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