Communication network having a dormant polling protocol

• US 5,896,561 A
• Filed: 12/23/1996
• Issued: 04/20/1999
• Est. Priority Date: 04/06/1992
• Status: Expired due to Term

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Inventors: Schrader, Steven B., Mahany, Ronald L.
• Primary Examiner(s): Congle, Thanh
• Application Number:
  US08/773,477
• Time in Patent Office: 848 Days
• Field of Search: 455/32.1, 455/507, 455/517, 455/526, 455/62, 455/63, 455/66, 455/67.1, 455/67.3, 455/67.4, 455/343, 370/445, 370/446, 370/447, 370/448, 370/449, 370/450, 370/457, 370/437, 370/545
• US Class Current: 455/67.11
• CPC Class Codes: H04B 17/0085 using test signal generators
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 74/06 using polling
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

A base station utilizing a dormant polling protocol transmits polling sequences to a plurality of remote transceivers during periods of heavy loading. During periods of light loading, the base station stops polling and enters into a dormant state, listening for communication request from the remote transceivers. Upon receiving such a request, the base station immediately responds by servicing the requesting remote transceiver. In this way, the base station provides optimized utilization of the communication channel during periods of heavy and light loading conditions. The features of the dormant polling protocol may incorporate any polling protocol such as those described herein.

Claims

1. In a radio frequency data communication network having a base station and a plurality of computing devices that comprises a plurality of roaming transceivers that are battery powered, wherein the base station supports communication among the plurality of computing devices within a premises, a method comprising:

evaluating, by the base station, current communication channel conditions;

dynamically selecting, by the base station, either a polling protocol or a carrier sense protocol based on the evaluation; and

dynamically selecting, by the plurality of roaming transceivers, the carrier sense protocol after determining through monitoring the communication channel that the polling protocol is not in use.

2. The method of claim 1 further comprising adjusting, by the base station, parameters of the polling protocol based on current communication channel conditions when the polling protocol is selected.

3. The method of claim 2 wherein the parameters comprise a polling rate.

4. The method of claim 1 wherein the dynamic selection by the base station comprises a use of hysteresis to manage the dynamic selection.

5. In a radio frequency data communication network located within a premises and having a base station and a plurality of roaming transceivers that are battery powered, a method comprising:

evaluating, by the base station, current communication channel conditions;

depending on the evaluation, dynamically, by the base station, either selecting a polling protocol for managing communication with the plurality of roaming transceivers or selecting a protocol which relinquishes control of communication to the plurality of roaming transceivers;

listening on the communication channel, by the plurality of roaming transceivers, to dynamically identify which protocol is currently selected; and

communicating, by the plurality of roaming transceivers, utilizing the selected protocol.

6. The method of claim 5 further comprising adjusting, by the base station, parameters of the polling protocol based on current communication channel conditions when the polling protocol is selected.

7. The method of claim 6 wherein the parameters comprise a polling rate.

8. The method of claim 5 wherein the dynamic selection by the base station comprises a use of hysteresis to manage the dynamic selection.

9. In a radio frequency data communication network located within a premises and having a base station and a plurality of roaming transceivers that are battery powered, a method comprising:

dynamically selecting, by the base station, either a first protocol that requires periodic transmissions by the base station to managing communication among the plurality of roaming transceivers, or a second protocol that does not require periodic transmissions by the base station to permit management of communication by the plurality of roaming transceivers; and

dynamically selecting, by the plurality of roaming transceivers, the second protocol after failing to identify periodic transmissions by the base station.

10. The method of claim 9 wherein the first protocol comprises a polling protocol.

11. The method of claim 9 wherein the second protocol comprises sensing that the channel is clear before one of the plurality of roaming transceivers attempts to transmit.

12. The method of claim 10 further comprising adjusting, by the base station, parameters of the first protocol based on prior communication characteristics when the first protocol is selected.

13. The method of claim 12 wherein the parameters comprise a polling rate.

14. The method of claim 9 wherein the dynamic selection by the base station comprises a use of hysteresis to manage the dynamic selection.