Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2005-07-12
2005-07-12
Pham, Chi (Department: 2667)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S441000
Reexamination Certificate
active
06917602
ABSTRACT:
A system and method for random access channel (RACH) capture, where user equipment (UE) transmits a series of time-spaced access preambles each having an increasing power level to Node B and terminates access preamble transmission in response to an acquisition indicator (AI) signal returned from Node B and transmits its RACH message part. A collision detection preamble (CDP) is sent immediately after the message or embedded with the message. A collision detection indicator (CDI) signal matching the CDP is transmitted from Node B to the UE identified as having the failed RACH message requesting retransmission of the message. Optionally, the relative retransmission power level is also specified to the UE along with the CDI signal.
REFERENCES:
patent: 5461639 (1995-10-01), Wheatley, III et al.
patent: 5909436 (1999-06-01), Engstrom et al.
patent: 6301286 (2001-10-01), Kanterakis et al.
patent: 6643318 (2003-11-01), Parsa et al.
3GPP TS 25.214 V3.8.0 (Sep. 2001) Section 6.1 (Physical Random Access Procedure).
3GPP TS 25.214 V3.8.0 (Sep. 2001) Section 6.2 (CPCH Access Procedures).
Derryberry R. Thomas
Hao Guan
Malkamaki Esa
Rinne Mikko J.
Toskala Antti
Boakye Alexander O.
Nokia Corporation
Pham Chi
Ware Fressola Van Der Sluys & Adolphson LLP
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