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In a data communication system (100) including infrastructure (101) arranged to communicate with a plurality of terminals (103) over a channel (109), a method of adaptable channel access practiced at a terminal (103) including determining an access priority value (303), responsive thereto ascertaining when the channel is available (305), and then executing a channel access attempt (307). The access priority value is determined with information received by the terminal or information available to the terminal.

Inventors: Karl A. Reardon, Bud Fraser
Original Assignee: Motorola, Inc.
Current U.S. Classification: 370/431; 370/448; 370/459
International Classification: H04L 12413

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Citations

Cited PatentFiling dateIssue dateOriginal AssigneeTitle
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US5483533Jul 25, 1994Jan 9, 1996NEC CorporationTraffic control system of local area network

Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US5734867Jul 28, 1995Mar 31, 1998Motorola, Inc.Method, device, microprocessor and microprocessor memory for instantaneous preemption of packet data
US5892769Aug 28, 1996Apr 6, 1999Motorola Inc.Method and system for prioritized multiple access using contention signatures for contention-based reservation
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US6115390May 22, 1998Sep 5, 2000Lucent Technologies, Inc.Bandwidth reservation and collision resolution method for multiple access communication networks where remote hosts send reservation requests to a base station for randomly chosen minislots
US6223046Dec 15, 1998Apr 24, 2001Telefonaktiebolaget LM Ericsson (publ)System and method for coordinating notification requests for terminal availability
US6301241Sep 25, 1998Oct 9, 2001Yazaki CorporationTransmission right assigning method and communication system
US6400695Oct 14, 1998Jun 4, 2002Lucent Technologies Inc.Methods and apparatus for retransmission based access priority in a communications system
US6603747Nov 13, 1998Aug 5, 2003NEC CorporationCommunication control method and communication control apparatus
US6721331Dec 15, 1999Apr 13, 2004AT&T Corp.Method and apparatus for decentralized prioritized scheduling in a CSMA/CA wireless system
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US6952427Apr 12, 2000Oct 4, 2005Mitsubishi Electric Information Technology Centre Europe B.V.
Mitsubishi Denki Kabushiki Kaisha		Method for terminals to have access to a common resource of a network
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US7245605Sep 27, 2002Jul 17, 2007AT&T Corp.Preemptive packet for maintaining contiguity in cyclic prioritized multiple access (CPMA) contention-free sessions
US7248600Sep 27, 2002Jul 24, 2007AT&T Corp.‘Shield’: protecting high priority channel access attempts in overlapped wireless cells
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US8111682Jul 23, 2007Feb 7, 2012AT&T Intellectual Property II, L.P.“Shield”: protecting high priority channel access attempts in overlapped wireless cells
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USRE42374Apr 5, 2006May 17, 2011Fujitsu LimitedMobile communication system enabling efficient use of small-zone base stations
USRE43138May 20, 2010Jan 24, 2012Fujitsu LimitedMobile communication system enabling efficient use of small-zone base stations
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Claims

1. In a data communication system including infrastructure arranged to communicate with a plurality of terminals over a channel, a method of adaptable channel access practiced at a terminal comprising the steps of:

determining an access priority value;
ascertaining a random time, responsive to said access priority value;
testing whether said channel is available;
if said channel is not available, waiting for said random time to expire and repeating said step of testing; and
executing, responsive to said step of testing, a channel access attempt when said channel is available.

2. The method of claim 1 wherein said step of determining an access priority value further includes the steps of:

receiving a message to provide access information, and
deriving, responsive to said access information, said access priority value.

3. The method of claim 2 wherein said step of receiving a message further provides said access information corresponding to a number of terminals registered for service.

4. The method of claim 2 wherein said step of receiving a message further provides said access information corresponding to a channel loading factor.

5. The method of claim 2 wherein said step of receiving a message further provides said access information corresponding to a system management parameter.

6. The method of claim 5 wherein said step of receiving a message further provides said system management parameter corresponding to a channel priority threshold.

7. The method of claim 1 wherein said step of determining an access priority value further includes a step of deriving said access priority value in accordance with a number of channel access attempts.

8. The method of claim 1 wherein said step of determining an access priority value further includes a step of deriving said access priority value in accordance with a terminal priority.

9. The method of claim 1 wherein said step of determining an access priority value further includes a step of deriving said access priority value in accordance with a change in channel priority threshold.

10. The method of claim 1 wherein said step of determining an access priority value further includes a step of deriving said access priority value in accordance with a user selected priority access level.

11. The method of claim 1 wherein said step of ascertaining further includes a step of receiving an indicator corresponding to the channel availability.

12. The method of claim 1 wherein said step of ascertaining when said channel is available further includes;

a step of checking to see if said channel is busy; if so waiting a random time that corresponds to said access priority value; and then rechecking whether said channel is busy.

Drawings