Method and apparatus for common packet channel assignment

Details Method and apparatus for common packet channel assignment Method and apparatus for common packet channel assignment

2006-07-18

2006-07-18

Hsu, Alpus H. (Department: 2665)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S335000, C370S342000, C370S349000, C370S445000, C455S453000, C455S509000, C455S522000

Reexamination Certificate

active

07079507

ABSTRACT:
A method and device for initiating uplink data packet communication from a mobile device to a base station on a common packet channel is disclosed. The communication is initiated when the mobile device reads broadcast status of common packet channels, after which the mobile device sends an access preamble to the base station that is acknowledged by the base station, and then the mobile device sends a collision preamble which the base station answers with a matching collision response. If the base station's response to the collision preamble also includes a channel allocation message, then the base station begins uplink data packet communication on an allocated channel provided that the allocated channel previously had free broadcast status. However, if the base station's response to the collision preamble includes a channel allocation message designating channel(s) not previously having free broadcast status, then the mobile device's access attempt is aborted.

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