Method for reducing time required to receive and decode a temporary equipment identifier message

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS FIG.
6 is a time flow diagram depicting an arrangement of message blocks that facilitates increased battery life through decreased power usage, in accord with the invention.
As with most CDPD control functions, the timing arrangement depicted in FIG.
6 is generated in the MD-IS using a mobile data link protocol (MDLP) described in Part 403 of the CDPD specification, Version 1.
1.
As previously discussed, manipulations and time adjustments at the MDLP level are inadequate to achieve acceptable reliability due to variations at the medium access control (MAC) level (as described in Part 402 of the CDPD specification, Version 1.
1).
Consequently, the approach described below is used to overcome this drawback.
The present invention applies to the two-way paging variation of the CDPD system, as well as the conventional version.
The two-way paging variation is essentially the same as a standard CDPD system but with a number of variations to allow two-way paging as described below.
The two-way paging variation of CDPD can share channels with AMPS communications as with the standard CDPD system.
However, the two-way paging variation is not limited to sharing AMPS channels, and can be used with dedicated channels outside of the AMPS band range.
In the operation of the two-way paging variation, the channel identification message must be acquired by the subscriber station before it can initiate the registration procedures normally carried out as defined in Part 407 of the CDPD specification.
This is done by the subscriber station monitoring for an indeterminate amount of time.
Further, the subscriber station must acquire the channel identification message after completing a cell transfer as is done in normal CDPD operation (although transmission can take place on a new channel prior to receipt of the channel identification message under certain circumstances).
This acquisition is preferably completed in time to allow the subscriber station to take steps to prevent the MD-IS (3 in FIG