Method for maximizing channel selection in a communication system

• US 5,222,247 A
• Filed: 10/01/1990
• Issued: 06/22/1993
• Est. Priority Date: 10/01/1990
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Breeden, Robert L.
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US07/590,758
• Time in Patent Office: 995 Days
• Field of Search: 455/1, 455/26.1, 455/33, 455/34.1, 455/34.2, 455/52-56, 455/63, 455/67, 455/33.1-33.4, 455/52.1-52.3, 455/53.1, 455/54.1, 455/54.2, 455/55.1 , 455/56.1, 455/67.1, 455/67.3, 375/1, 379/59, 379/63, 380/6
• US Class Current: 455/26.1
• CPC Class Codes: H04B 1/10 Means associated with receiver for limiting or suppressing noise or interference
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A communication system (100) has at least one base site (204) which includes a plurality of transceivers (110A-C) operating on a plurality of communication channels for communicating to at least one of a plurality of communicators (108). The at least one base site (204) comprises a generator (210) generating a plurality of interference signals according to a predetermined pattern on a subset of the plurality of communication channels. A processor (208) initiating and terminating communication between the base site (204) and the at least one communicator (108) on a selected communication channel substantially free of interference signals. The processor (208) further determines the communication channel being selected, and determines whether to change the predetermined pattern of the plurality of interference signals. The processor (208), coupled to said generator (210), steers other initiating communicators (108) to communication channels substantially free of interference by altering the predetermined pattern of interference signals. The altering of the predetermined pattern comprises selectively enabling and disabling interference signals subsequent to the initiation and termination of the communication between the base site (204) and the at least one communicator (108).

Claims

1. A communication system having at least one base site including a plurality of transceivers operating on a plurality of communication channels for communicating to at least one of a plurality of communicators, the at least one base site, comprising:

generating means for generating a plurality of interference signals according to a predetermined pattern on a subset of the plurality of communication channels;

processing means for initiating and terminating communication between the base site and the at least one communicator on a selected communication channel substantially free of interference signals,

said processing means further determining the communication channel being selected, and for determining whether to change the predetermined pattern of said plurality of interference signals,

said processing means, coupled to said generating means, for steering other initiating communicators to communication channels substantially free of interference by altering the predetermined pattern of interference signals, wherein the altering of the predetermined pattern comprises selectively enabling and disabling interference signals subsequent to the initiation and termination of the communication between the base site and the at least one communicator.

2. The communication system according to claim 1 wherein the plurality of interference signals are arranged according to an even pattern with the interference signals being selectively placed on even communication channels numbers and spaced every four channels apart.

3. The communication system according to claim 2 wherein the plurality of interference signals comprise a pseudo interference signal.

4. The communication system according to claim 1 wherein the plurality of interference signals are arranged according to an odd pattern with the plurality of interference signals being selectively placed on odd communication channels numbers and spaced every four channels apart.

5. The communication system according to claim 4 wherein the plurality of interference signals comprise a pseudo interference signal.

6. The communication system according to claim 1 wherein an interference signal is placed on a first communication channel of an even configuration and a last channel of an odd configuration to ensure that an adjacent channel is not selected.

7. A communication system including a base site, said base site comprising:

transmitting and receiving means for communicating with at least one of a plurality of communicators;

generating means for generating a plurality of interference signals;

processing means, coupled to the generating means, for steering at least one of a plurality of communicators to one of a selected subset of communication channels by selectively placing the generated interference signals according to a predetermined pattern on a subset of the plurality of communication channels said selected subset of channels being free of interference signals being generated; and

said processing means further selectively disabling and enabling interference signals in response to initiating and terminating communication with at least one communicator whereby said selective enabling and disabling of interference signals steer initiating communicators to select communication channels according to a predetermined pattern for maximizing use of the plurality of communication channels.

8. The communication system according to claim 7 wherein the plurality of interference signals are arranged according to an even pattern with the plurality of interference signals being selectively placed on even communication channels numbers and spaced every four channels apart.

9. The communication system according to claim 8 wherein the plurality of interference signal comprise a pseudo interference signal.

10. The communication system according to claim 7 wherein the plurality of interference signals are arranged according to an odd pattern with the plurality of interference signals being selectively placed on odd communication channels numbers and spaced every four channels apart.

11. The communication system according to claim 10 wherein the plurality of interference signal comprises a pseudo interference signal.

12. The communication system according to claim 7 wherein an interference signal is placed on a first communication channel of an even configuration and a last channel of an odd configuration to ensure that an adjacent channel is not selected.

13. A method for allocating communication channels, comprising the steps of:

(a) generating a plurality of interference signals in a predetermined pattern on a subset of communication channels of a plurality of communication channels;

(b) assigning an initiating one of a plurality of communicators to a communication channel being substantially free of interference for communicating via the assigned communication channel;

(c) removing selected interference signals in response to step (b); and

(d) terminating communicating on the assigned channel; and

(e) replacing the interference signals in response step (d) whereby the steps of removing and replacing further steer initiating communicators to select communication channels according to the pattern of interference signals being generated on the subset of the plurality of communication channels.

14. A communication system having at least one base site including a plurality of transceivers operating on a plurality of communication channels for communicating to at least one of a plurality of communicators, the at least one base site, comprising:

means for generating a plurality interference signals and selectively placing the interference signals in an odd or even configuration on a plurality of contiguous communication channels;

processing means, coupled to the generating means, for steering a communicator initiating communication with the base site to communicate on a communication channel substantially free of interference according to the odd or even configuration;

said processing means, comprising;

means further determining the communication channel being selected, and for determining whether to change the predetermined pattern of said plurality of interference signals;

means for removing the interference signals from at least one of the plurality of communication channels subsequent to assigning a communication channel in response to the determining means; and

means for replacing the interference signals on the communication channels upon termination of the use of a communication channel in response to the determining means.