Method for providing communication between a distribution panel and console interface units

• US 5,420,577 A
• Filed: 05/03/1993
• Issued: 05/30/1995
• Est. Priority Date: 05/03/1993
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Kim, Charles C., Woodhouse, Robert D.
• Primary Examiner(s): Horabik, Michael
• Application Number:
  US08/055,452
• Time in Patent Office: 757 Days
• Field of Search: 340/825.07, 340/825.08, 340/825.52, 340/825.54, 340/825.16, 455/7, 455/9, 455/14, 455/17, 455/13.1, 455/56.1, 455/8, 379/63, 371/7
• US Class Current: 455/14
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 9/083 involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

In a secure trunked communication system that includes a central controller, communication between a distribution panel and a limited number of console interface units may be achieved in the following manner. At power up or upon a reset condition, the distribution panel transmits a status check message to each console interface unit in the system. Console interface units that are active respond by transmitting an acknowledgement. Upon receiving the acknowledgement, the distribution panel transmits the addresses of the active console interface units to the central controller. When the distribution panel receives secure information from the central controller, it interprets the information to identify a target console interface unit and transmits the received secure information to the target console interface unit.

Claims

1. In a secure trunking communication system that includes a central controller, a limited number of communication resources that are transceived via a limited number or repeaters, at least one console, a limited number of console interface units that couple the at least one console to the limited number of repeaters, and a distribution panel that couples the central controller to the limited number of console interface units, a method for providing communication between the distribution panel and the limited number of console interface units, the method comprises the steps of:

a) at initial power up or upon a reset condition, transmitting a status check message from the distribution panel to each of the limited number of console interface units;

b) receiving, by the distribution panel, an acknowledgment from console interface units of the limited number of console interface units that are active to produce active console interface units;

c) transmitting an address for each of the active console interface units from the distribution panel to the central controller;

d) from time to time, receiving, by the distribution panel, secure communication information from the central controller;

e) interpreting, by the distribution panel, the secure communication information to identify at least one target console interface unit of the active console interface units;

f) transmitting, by the distribution panel, the secure communication information to the at least one target console interface unit; and

g) when the distribution panel fails to transmit to the active console interface units for a predetermined period of time, performing, by the active console interface units, a default secure procedure.

2. In a secure trunking communication system that includes a central controller, a limited number of communication resources that are transceived via a limited number of repeaters, at least one console, a limited number of console interface units that couple the at least one console to the limited number of repeaters, a distribution panel that couples the central controller to the limited number of console interface units, a method for each of the console interface units to communicate with the distribution panel, the method comprises the steps of:

a) receiving, by each of the limited number of console interface units, a status check message from the distribution panel;

b) transmitting an acknowledgment signal to the distribution panel by active console interface units of the limited number of console interface units;

c) from time to time, receiving, by an active console interface unit of the active console interface units, secure communication information from the distribution panel;

d) performing, by the active console interface unit, an action indicated by the secure communication information; and

e) when the distribution panel fails to transmit to the active console interface units for a predetermined period of time, performing, by the active console interface units, a default secure procedure.

3. The method of claim 2 further comprises the steps of:

f) receiving, by a target console interface unit, the secure communication information, wherein the secure communication information indicates an over the air rekeying procedure.

4. The method of claim 2 further comprises the steps of:

f) from time to time, receiving, by each of the limited number of console interface units, a status check message from the distribution panel; and

g) transmitting an acknowledgment from console interface units of the limited number of console interface units that are active to the distribution panel to produce updated active console interface units.

5. The method of claim 2 further comprises the step of:

f) transmitting, an acknowledgement by the at least one target console interface unit to the distribution panel when the at least one target console interface unit receives the secure communication information.