Method and apparatus for effecting channel acquisition

• US 6,023,230 A
• Filed: 08/29/1997
• Issued: 02/08/2000
• Est. Priority Date: 08/29/1997
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Brianson, Charles Louis Alain, Sumner, Terence Edward, Dorenbosch, Jheroen Pieter
• Primary Examiner(s): Zimmerman, Brian
• Assistant Examiner(s): JEANGLAUDE, JEAN BRUNER
• Application Number:
  US08/921,098
• Time in Patent Office: 893 Days
• Field of Search: 340/825.44, 340/825.47, 340/825.49, 340/825.27, 340/825.03, 340/825.04, 340/825.5, 340/825.51, 455/38.1, 455/54.2, 455/88, 455/186.1, 455/434, 455/450, 455/512, 379/59, 379/58, 379/57, 375/344, 370/412, 370/336, 370/468, 370/337, 370/329, 370/444
• US Class Current: 340/7.24
• CPC Class Codes: H04W 88/022 Selective call receivers

Abstract

Methods of and corresponding apparatus for scheduling messages on an operating channel (223) in a selective messaging system (200) for a messaging unit (235) include scheduling a first message, including a channel priority indication (511), addressed to the selective messaging unit on a first channel, and then scheduling a second message for the selective messaging unit on a second channel (225) selected as an alternative operating channel. Analogously at the selective messaging unit a method of selecting an operating channel includes monitoring the first channel for a message addressed to the selective messaging unit; detecting as part of the message the indication; and responsive thereto discontinuing monitoring the first channel and then scan for the second channel.

Claims

1. In a selective messaging unit a method of selecting an operating channel, said method including the steps of:

providing a list of potential operating channels, said list including a first channel and a second channel;

monitoring said first channel for a message addressed to the selective messaging unit;

detecting as part of said message an indication further including a priority command and modifying said list in accordance with said priority command to provide a modified list during said step of monitoring;

discontinuing, responsive to said indication, said step of monitoring; and

then scanning for said second channel to use as the operating channel.

2. The method of claim 1 wherein said step of discontinuing is performed at a time corresponding to information within said indication.

3. The method of claim 1 wherein said step of scanning further includes scanning channels corresponding to said modified list to provide said second channel.

4. The method of claim 3 wherein said step of scanning channels includes scanning a channel for an intermediate location.

5. The method of claim 3 wherein said step of scanning channels includes scanning a channel for a diverted location.

6. The method of claim 3 wherein said step of scanning channels includes scanning a channel for a previous location.

7. In a selective messaging system a method of scheduling messages on an operating channel for a selective messaging unit, the method including the steps of:

first scheduling a first message addressed to the selective messaging unit on a first channel, said first message including a channel priority indication corresponding to said first channel; and

second scheduling a second message for said selective messaging unit on a second channel, said second channel selected as the operating channel from a plurality of channels as an alternative to said first channel.

8. The method of claim 7 wherein said step of second scheduling said second message includes scheduling said second message on each channel of said plurality of channels.

9. The method of claim 7 wherein said step of second scheduling is performed at a time determined to correspond to said channel priority indication.

10. The method of claim 7 wherein said step of second scheduling includes scheduling said second message on a channel for an intermediate location.

11. The method of claim 7 wherein said step of second scheduling includes scheduling said second message on a channel for a previous location.

12. The method of claim 7 wherein said step of second scheduling includes scheduling said second message on a channel for a diverted location.

13. The method of claim 7 further including a step of providing a list of potential operating channels for the selective messaging unit, said list including said plurality of channels.

14. The method of claim 13 wherein said step of first scheduling further includes formulating said channel priority indication to correspond to a relative priority of channels within said plurality of channels.

15. A selective messaging unit arranged and constructed for selecting an operating channel and comprising in combination:

a memory for storing a list of potential operating channels, said list including a first channel and a second channel

a receiver for monitoring said first channel for a message addressed to the selective messaging unit; and

a controller, coupled to said receiver, for detecting as part of said message an indication further including a priority command and modifying said list in accordance with said priority command to provide a modified list and responsive thereto causing said receiver to discontinue monitoring said first channel and then scan for said second channel to use as the operating channel.

16. The selective messaging unit of claim 15 wherein said receiver discontinues monitoring said first channel at a time corresponding to information within said indication.

17. The selective messaging unit of claim 15 wherein said controller cooperatively with said receiver scans channels corresponding to said modified list to provide said second channel.

18. The selective messaging unit of claim 17 wherein said controller together with said receiver scans a channel for a diverted location.

19. The selective messaging unit of claim 17 wherein said controller together with said receiver scans a channel for a previous location.

20. The selective messaging unit of claim 17 wherein said controller together with said receiver scans a channel for an intermediate location.

21. A messaging system controller for scheduling messages on an operating channel for a selective messaging unit, the messaging system controller comprising in combination:

a processor for scheduling a first message addressed to the selective messaging unit on a first channel, said first message including a channel priority indication corresponding to said first channel;

said processor then scheduling a second message for said selective messaging unit on a second channel, said second channel selected as the operating channel from a plurality of channels as an alternative to said first channel; and

a transmitter port for coupling said first message and said second message to corresponding transmitters.

22. The messaging system controller of claim 21 wherein said processor schedules said second message on each channel of said plurality of channels.

23. The messaging system controller of claim 21 wherein said processor schedules said second message on a channel for a diverted location.

24. The messaging system controller of claim 21 wherein said processor schedules said second message on a channel for a previous location.

25. The messaging system controller of claim 21 wherein said processor schedules said second message on a channel for an intermediate location.

26. The messaging system controller of claim 21 wherein said processor schedules said second message at a time determined to correspond to said channel priority indication.

27. The messaging system controller of claim 21 further including a memory for storing a list of potential operating channels for the selective messaging unit, said list including said plurality of channels.

28. The messaging system controller of claim 27 wherein said step of first scheduling further includes formulating said channel priority indication to correspond to a relative priority of channels within said plurality of channels.