Communication system and operating method thereof

• US 6,122,291 A
• Filed: 12/22/1997
• Issued: 09/19/2000
• Est. Priority Date: 03/07/1996
• Status: Expired due to Term

• Current Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Robinson, William Neil, Chambers, David, Crichton, Paul, Benn, Howard Peter
• Primary Examiner(s): Patel, Ajit
• Assistant Examiner(s): Phunkulh, Bob A.
• Application Number:
  US08/945,618
• Time in Patent Office: 1,002 Days
• Field of Search: 370/328, 370/329, 370/330, 370/331, 370/341, 370/461, 370/465, 370/448, 370/431, 370/468, 455/422, 455/450, 455/451, 455/452, 455/454
• US Class Current: 370/468
• CPC Class Codes: H04B 7/2659 for data rate control
• CPC Class Codes: H04W 28/20 Negotiating bandwidth

Abstract

A communication system (28), comprises a master device (44) and slave device (30). Consequential to negotiations within the system (28) and having regard to system capacity and a relative hierarchy that exists between on-going communications, a bandwidth used for an on-going communication between the master device (44) and the slave device (30) is modified in proportion to a substantially instantaneous data rate requirement of the communication. As such, the system allows fluctuations in the amount of information, transmitted in a fixed time through an optimization of an available and dynamically varying bandwidth, while biasing the communication resource in relation to the relative hierarchy.

Claims

1. A communication system having a communication resource for supporting communications on a plurality of channels having channel bandwidths in a radio frequency (RF) domain, the plurality of channels capable of supporting a plurality of differing services, the system comprising:

means for determining a demand on the communication resource;

means for dynamically modifying a bandwidth in the RF domain of at least one channel of the plurality of channels in response to the demand, said means for dynamically modifying being arranged to modify the bandwidth to bias the communication resource with respect to a relative hierarchy that exists between ongoing communications; and

means for storing hierarchy information defining a relative hierarchy within communication devices of the communication system, and wherein the means for dynamically modifying the bandwidth modifies the bandwidth of at least one channel to bias the communication resource to support an operating capability of a first communication device having a hierarchy relatively high to that of a second communication device having a relatively lower hierarchy in the communication system;

wherein a bandwidth allocated to the second communication device is reduced, and further wherein services of greater importance in relaying information to the second communication device are maintained above ancillary services that are complementary to the relaying of such information.

2. The communication system of claim 1, wherein a bandwidth allocated to the second communication device is suspended.

3. The communication system of claim 1, wherein the hierarchy is based on access priority.

4. The communication system of claim 1, wherein the relative hierarchy exists between differing services supported by the communication system.

5. The communication system of claim 1, wherein the means for dynamically modifying the bandwidth modifies the bandwidth of at least one channel in proportion to a substantially instantaneous data rate requirement of a communication on that channel.

6. The communication system of claim 1, wherein the means for dynamically modifying the bandwidth further comprises means for assigning a central channel frequency for the at least one channel of the plurality of channels.

7. The communication system of claim 6, wherein the means for assigning central channel frequencies is arranged such that the plurality of channels occupy a contiguous block of bandwidth within the communication resource.

8. The communication system of claim 1, further comprising memory for storing operating parameter information related to operational parameters of communication devices of the communication system, and wherein the means for dynamically modifying the bandwidth modifies the bandwidth of at least one channel to optimise the amount of information provided on the at least one channel in a fixed time having regard to the operating parameter information.

9. The communication system of claim 1, further comprising memory for storing operating parameter information related to operational parameters of communication devices of the system, and wherein the means for dynamically modifying the bandwidth is arranged to ensure that a minimum bandwidth is provided to communication devices active on the communication resource at any time.

10. A method for distributing a communication resource of a communication system into a plurality of channels, the method comprising the steps of:

determining a demand on the communication resource;

dynamically modifying a bandwidth in a radio frequency domain of at least one channel of the plurality of channels in response to the demand, thereby dynamically varying an amount of information provided on the at least one channel in a fixed time;

modifying the bandwidth to bias the communication resource in relation to a relative hierarchy that exists between on-going communications;

storing hierarchy information defining a relative hierarchy within communication devices of the communication system;

biasing the communication resource to support an operating capability of a first communication device having a hierarchy relatively high to that of a second communication device having a relatively lower hierarchy in the communication system; and

maintaining services of greater importance in relaying information to the second communication device above ancillary services that are complementary to the relaying of such information, wherein a bandwidth allocated to the second communication device is reduced.

11. A communication system having a communication resource for supporting communications on a plurality of channels having channel bandwidths in a radio frequency (RF) domain, the plurality of channels capable of supporting a plurality of differing services, the system comprising:

means for determining a demand on the communication resource;

means for dynamically modifying a bandwidth in the RF domain of at least one channel of the plurality of channels in response to the demand, said means for dynamically modifying being arranged to modify the bandwidth to bias the communication resource with respect to a relative hierarchy that exists between ongoing communications, wherein the means for dynamically modifying the bandwidth further comprises means for assigning a central channel frequency for the at least one channel of the plurality of channels; and

means for storing hierarchy information defining a relative hierarchy within communication devices of the communication system, and wherein the means for dynamically modifying the bandwidth modifies the bandwidth of at least one channel to bias the communication resource to support an operating capability of a first communication device having a hierarchy relatively high to that of a second communication device having a relatively lower hierarchy in the communication system, wherein a bandwidth allocated to the second communication device is reduced.

12. The communication system of claim 11, wherein the means for dynamically modifying the bandwidth modifies the bandwidth of at least one channel in proportion to a substantially instantaneous data rate requirement of a communication on that channel.

13. The communication system of claim 11, wherein the means for assigning central channel frequencies is arranged such that the plurality of channels occupy a contiguous block of bandwidth within the communication resource.

14. The communication system of claim 11, further comprising memory for storing operating parameter information related to operational parameters of communication devices of the communication system, and wherein the means for dynamically modifying the bandwidth modifies the bandwidth of at least one channel to optimise the amount of information provided on the at least one channel in a fixed time having regard to the operating parameter information.

15. The communication system of claim 11, further comprising memory for storing operating parameter information related to operational parameters of communication devices of the system, and wherein the means for dynamically modifying the bandwidth is arranged to ensure that a minimum bandwidth is provided to communication devices active on the communication resource at any time.

16. A method for distributing a communication resource of a communication system into a plurality of channels, the method comprising the steps of:

determining a demand on the communication resource;

dynamically modifying a bandwidth in a radio frequency domain of at least one channel of the plurality of channels in response to the demand, thereby dynamically varying an amount of information provided on the at least one channel in a fixed time, wherein the step of dynamically modifying includes the step of assigning a central channel frequency for the at least one channel of the plurality of channels;

modifying the bandwidth to bias the communication resource in relation to a relative hierarchy that exists between on-going communications;

storing hierarchy information defining a relative hierarchy within communication devices of the communication system; and

biasing the communication resource to support an operating capability of a first communication device having a hierarchy relatively high to that of a second communication device having a relatively lower hierarchy in the communication system, wherein a bandwidth allocated to the second communication device is reduced.