Patent ID: 6606309
Filing Date: 2003-08-12
Classification: H04W

Abstract:
A method of communicating access requests and short message acknowledgments in a radiotelephone communications system including a central station and a plurality of radiotelephones communicating over a plurality of carrier frequency bands, the radiotelephone communications system including a short message service (SMS) for communicating short messages from the central station to the plurality of radiotelephones, the method comprising the steps:communicating access requests from the plurality of radiotelephones to the central station over a random access channel carrier (RACH) frequency band during a first RACH message time window, the access requests representing requests for access to the radiotelephone system such that communication of access requests from the plurality of radiotelephones on the RACH carrier frequency band is constrained to occur during the first RACH message time window; and communicating short message acknowledgements from the plurality of radiotelephones to the central station over the RACH carrier frequency band during a second RACH message time window such that communication of short message acknowledgements from the plurality of radiotelephones on the RACH carrier frequency band is constrained to occur during the second RACH message time window.