Method for indicating a band plan for a trunked radio communications system

• US 7,962,166 B1
• Filed: 08/30/2005
• Issued: 06/14/2011
• Est. Priority Date: 08/30/2005
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Wilson, Christopher H., Trandai, Tanhoa, Gilbert, John M., Griffis, Donald R., McDonald, Daniel J.
• Primary Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US11/215,723
• Time in Patent Office: 2,114 Days
• Field of Search: 455/418, 455/519
• US Class Current: 455/520
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 8/205 Transfer to or from user equipment or user record carrier
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

A receiving device in the trunked radio communications system receives an outbound signaling word comprising at least an opcode field and a band plan field, wherein the opcode field indicates that the outbound signaling message is a system status message and the band plan field indicates the band plan in use on the site. In another embodiment, the receiving device receives an outbound signaling word comprising at least an opcode field, a site identification field and a four bit band plan field, wherein the opcode field indicates that the outbound signaling message is an adjacent control channel message, the site identification field identifies a second site, and the four bit band plan field indicates the band plan in use on the second site.

Claims

1. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprises at least one site and a plurality of receiving devices, a method for indicating a band plan of the at least one site to a receiving device of the plurality of receiving devices, the method comprising the steps of:

at the receiving device in the trunked radio communications system;

receiving a 27 bit system status outbound signaling word from the at least one site comprising at least an opcode field and a band plan field, wherein

(a) the opcode field indicates that the 27 bit system status outbound signaling word is a system status message, and

(b) the band plan field indicates the band plan in use on the at least one site, wherein the band plan specifies a numbering scheme and bandwidth for a plurality of channels.

2. The method of claim 1 wherein the receiving device is at least one of a subscriber, a subscriber unit, a radio, a mobile, a portable, a receiver, a scanner, and a scanner device.

3. The method of claim 1 wherein the opcode field is a three bit field.

4. The method of claim 3 wherein the opcode field has a binary value of 010.

5. The method of claim 1 wherein the band plan field is a four bit field.

6. The method of claim 1 wherein the band plan field has at least one of values of 0001, 0011, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1101, and 1111.

7. The method of claim 1 further comprising receiving a second 27 bit outbound signaling word wherein the second 27 bit outbound signaling word indicates a band plan for an adjacent site in the trunked radio communications system.

8. The method of claim 1 further comprising receiving a three word outbound signaling word from a first site comprising at least an opcode field and a four bit band plan field, wherein the opcode field indicates that the three word outbound signaling word is an adjacent control channel message and the four bit band plan field indicates the band plan in use on a control channel in the at least one site.

9. The method of claim 8 wherein the opcode field is a six bit field.

10. The method of claim 9 wherein the opcode field has a binary value of 011000.

11. The method of claim 8 wherein the band plan field comprises noncontiguous bits of the adjacent control channel message.

12. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprises at least two sites and a plurality of receiving devices, a method for indicating a band plan to a receiving device of the plurality of receiving devices, the method comprising the steps of:

at the receiving device in the trunked radio communications system;

receiving an adjacent control channel outbound signaling word comprising three 27 bit words from a first site, wherein the adjacent control channel outbound signaling word comprises at least an opcode field, a site identification field and a four bit band plan field, wherein

(a) the opcode field indicates that the three 27 bit words form the adjacent control channel outbound signaling word,

(b) the site identification field identifies a second site, and

(c) the four bit band plan field indicates the band plan in use on the second site, wherein the band plan specifies a numbering scheme and bandwidth for a plurality of channels.

13. The method of claim 12 wherein the receiving device is at least one of a subscriber, a subscriber unit, a radio, a mobile, a portable, a receiver, a scanner, and a scanner device.

14. The method of claim 12 wherein the opcode field is a six bit field.

15. The method of claim 14 wherein the opcode field has a binary value of 011000.

16. The method of claim 12 wherein the site identification field is a six bit field.

17. The method of claim 12 wherein the band plan field comprises noncontiguous bits of the adjacent control channel message.

18. The method of claim 12 wherein the band plan field has at least one of values of 0101, 0110, 1000, 1001, 1010, 1011, and 1101.

19. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprises at least two sites and a plurality of receiving devices, a method for indicating a band plan to a receiving device of the plurality of receiving devices, the method comprising the steps of:

at the receiving device in the trunked radio communications system;

receiving an adjacent control channel outbound signaling word comprising three 27 bit words from a first site, wherein the adjacent control channel outbound signaling word comprises at least an opcode field, a site identification field, a four bit band plan field, and a control channel field, wherein

(a) the opcode field indicates that the three 27 bit words form the adjacent control channel outbound signaling word,

(b) the site identification field identifies the first site,

(c) the four bit band plan field indicates a band plan in use on a back up control channel of the first site and further indicates a band plan in use on the first site, wherein the band plan in use on the first site specifies a numbering scheme and bandwidth for a plurality of channels, and

(d) the control channel field identifies the back up control channel for the first site.

20. The method of claim 19 wherein the receiving device is at least one of a subscriber, a subscriber unit, a radio, a mobile, a portable, a receiver, a scanner, and a scanner device.