Methods and devices for asynchronous operation of a CDMA mobile communication system
First Claim
Patent Images
1. A method for operating a control processor in an asynchronous CDMA communication system, comprising:
- periodically updating a table of instantaneous PN code offsets of base transceiver station signals;
identifying an imminent collision of PN codes of a pair of base transceiver stations; and
issuing a command to initiate a corrective action at one of the pair of base transceiver stations.
7 Assignments
0 Petitions
Accused Products
Abstract
A CDMA mobile communication system is operated asynchronously while using common forward channel PN and Walsh codes. Such operation is enabled by devices in the system that provide measurements of the instantaneous offsets between PN codes of neighboring base stations. Knowledge of instantaneous offsets may be maintained and used to identify base station signals to enable handovers to neighboring base stations. Instantaneous offsets may also be processed over time to identify states of imminent collision so that corrective action can be taken to avoid or minimize collision effects.
57 Citations
26 Claims
-
1. A method for operating a control processor in an asynchronous CDMA communication system, comprising:
-
periodically updating a table of instantaneous PN code offsets of base transceiver station signals;
identifying an imminent collision of PN codes of a pair of base transceiver stations; and
issuing a command to initiate a corrective action at one of the pair of base transceiver stations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A collision control device for an asynchronous CDMA communication system, comprising:
-
means for periodically updating a table of instantaneous PN code offsets of asynchronous base transceiver station signals;
means for identifying an imminent collision of PN codes of a pair of base transceiver stations; and
means for issuing a command to initiate a corrective action at one of the pair of base transceiver stations. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
Specification