| 摘要 |
ESTABLISHING A CONNECTION BETWEEN A PAGING UNIT AND A STANDBY UNIT IN A CHANNEL HOPPING COMMUNICATIONS SYSTEM INCLUDES ACTIVATING THE STANDBY UNIT FOR AN ACTIVATION TIME PERIOD OUT OF EVERY STANDBY TIME PERIOD. DURING EACH ACTIVATION TIME PERIOD, THE STANDBY UNIT MONITORS A SELECTED CHANNEL FOR RECEIPT OF A PAGING MESSAGE. THE SELECTED CHANNEL IS SELECTED FROM A PLURALITY OF CHANNELS, AND, FOR EACH SUBSEQUENT ACTIVATION TIME PERIOD, THE SELECTED CHANNEL IS A SUBSEQUENT ONE OF THE PLURALITY OF CHANNELS AS SPECIFIED BY A HOPPING SEQUENCE AND AN INTERNAL CLOCK. A PAGE TRAIN IS REPEATEDLY TRANSMITTED FROM THE PAGING UNIT TO THE STANDBY UNIT, UNTIL A RESPONSE IS RECEIVED FROM THE STANDBY UNIT. EACH PAGE TRAIN INCLUDES A PLURALITY OF PAGING MESSAGES, EACH PAGING MESSAGE BEING TRANSMITTED ON A DIFFERENT ONE OF A SUBSET OF THE PLURALITY OF CHANNELS. SELECTION OF A PAGE TRAIN FOR TRANSMISSION BY THE PAGING UNIT MAY BE BASED ON AN ESTIMATE OF THE STANDBY UNITS INTERNAL CLOCK. (FIG. 10) |
