# US 5,349,584 A · Method of maintaining control in a trunked communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,349,584 A - Document ID: US5349584A - Status: Granted - Kind: A - Application number: 08/114,799 - Filed: 1993-08-30 - Granted: 1994-09-20 - Earliest claimed: 1993-08-30 - Assignees: Motorola, Inc. - Inventors: David A. Sticha; Glenn N. Mayer; Stephen J. Ranz; John Garbarino - Web page: https://patentgrep.com/patent/US5349584A ## CPC - H04W 84/08: Trunked mobile radio systems - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A master repeater controls a trunked communication system having a number of communication resources. The master repeater determines (201) how many communication resources are available to the master repeater. When one control resource and one message resource are among the available communication resources (203), the master repeater suspends (211) trunked communication system operation when the number of available communication resources are less than a minimum number of resources (205), and the available communication resources fail to include all control resources (207) from the trunked communication system. When one control resource and one message resource are among the available communication resources (203), the master repeater provides (209) trunked communication system operation when the number of available communication resources are equal to or greater than a minimum number of resources (205), or the available communication resources include all control resources (207) from the trunked communication system. ## Claims ### Claim 1 A method of maintaining control by a master repeater of a trunked communication system having a number of communication resources, wherein the number of communication resources includes one or more control resources and one or more message resources, comprising the steps of: (A) determining how many communication resources, from among the number of communication resources are available to the master repeater, providing a number of available communication resources; (B) when at least one control resource and at least one message resource are among the available communication resources, suspending trunked communication system operation when: (a) the number of available communication resources are less than a minimum number of resources; and (b) the available communication resources fail to include all control resources from the trunked communication system; (C) when at least one control resource and at least one message resource are among the available communication resources, providing trunked communication system operation when one of the following is true: (a) the number of available communication resources are equal to or greater than a minimum number of resources; and (b) the available communication resources include all control resources from the trunked communication system. ### Claim 2 (depends on 1) The method of claim 1, further including the step of (D) suspending trunked communication system operation when the available communication resources fail to include at least one control resource and at least one message resource. ### Claim 3 (depends on 2) The method of claim 2, wherein the trunked communication system has at least two master repeaters, and each of the at least two master repeaters performs steps (A) through (D), such that at most one of the at least two master repeaters provides control for the trunked communication system. ### Claim 4 (depends on 1) The method of claim 1, wherein the number of communication resources in the trunked communication system comprises an even number, further comprising the steps of: designating one resource as a token resource; specifying as the minimum number of resources a predetermined value when one of the available communication resources is the token resource; and specifying as the minimum number of resources the predetermined value plus one when the available communication resources fail to include the token resource. ### Claim 5 (depends on 1) The method of claim 1, wherein one repeater provides one communication resource at a given time. ### Claim 6 A method of maintaining control by a master repeater of a trunked communication system having a number of communication resources, wherein the number of communication resources includes one or more control resources and one or more message resources, comprising the steps of: (A) determining how many communication resources, from among the number of communication resources, are available to the master repeater, providing a number of available communication resources; (B) when at least one control resource and at least one message resource are among the available communication resources, suspending trunked communication system operation when: (a) the number of available communication resources are less than a minimum number of resources; (b) the available communication resources fail to include all control resources from the trunked communication system; and (c) the available communication resources fail to be sourced by all master capable repeaters from the trunked communication system (C) when at least one control resource and at least one message resource are among the available communication resources, providing trunked communication system operation when one of the following is true: (a) the number of available communication resources are equal to or greater than a minimum number of resources; (b) the available communication resources include all control resources from the trunked communication system; and (c) the available communication resources are sourced by all master capable repeaters from the trunked communication system. ### Claim 7 (depends on 6) The method of claim 6, further including the step of (D) suspending trunked communication system operation when the available communication resources fail to include at least one control resource and at least one message resource. ### Claim 8 (depends on 7) The method of claim 7, wherein the trunked communication system has at least two master repeaters, and each of the at least two master repeaters performs steps (A) through (D), such that at most one of the at least two master repeaters provides control for the trunked communication system. ### Claim 9 (depends on 6) The method of claim 6, wherein the number of communication resources in the trunked communication system comprises an even number, further comprising the steps of: designating one resource as a token resource; specifying as the minimum number of resources a predetermined value when one of the available communication resources is the token resource; and specifying as the minimum number of resources the predetermined value plus one when the available communication resources fail to include the token resource. ### Claim 10 (depends on 6) The method of claim 6, wherein one repeater provides one communication resource at a given time. ### Claim 11 A method of maintaining control, by a master repeater, of a trunked communication system having a number of communication resources, wherein the number of communication resources includes one or more control resources and one or more message resources, comprising the steps of: (A) determining how many communication resources, from among the number of communication resources, are available to the master repeater, and providing a number of available communication resources; (B) suspending trunked communication system operation when the available communication resources fail to include at least one control resource and at least one message resource; (C) when at least one control resource and at least one message resource are among the available communication resources, a suspending trunked communication system operation when: (a) the number of available communication resources are less than a minimum number of resources; (b) the available communication resources fail to include all control resources from the trunked communication system; and (c) the available communication resources fail to be sourced by all master capable repeaters from the trunked communication system. (D) when at least one control resource and at least one message resource are among the available communication resources, providing trunked communication system operation when one of the following is true: (a) the number of available communication resources are equal to or greater than a minimum number of resources; (b) the available communication resources include all control resources from the trunked communication system; and (c) the available communication resources are sourced by all master capable repeaters from the trunked communication system. ### Claim 12 (depends on 11) The method of claim 11, wherein the trunked communication system has at least two master repeaters, and each of the at least two master repeaters performs steps (A) through (D), such that at most one of the at least two master repeaters provides control for the trunked communication system. ### Claim 13 (depends on 11) The method of claim 11, wherein the number of communication resources in the trunked communication system comprises an even number, further comprising the steps of: designating one resource as a token resource; specifying as the minimum number of resources a predetermined value when one of the available communication resources is the token resource; and specifying as the minimum number of resources the predetermined value plus one when the available communication resources fail to include the token resource. ### Claim 14 (depends on 11) The method of claim 11, wherein one repeater provides one communication resource at a given time.