Dynamic regrouping in a trunked radio communications systems

• US 5,369,783 A
• Filed: 10/13/1993
• Issued: 11/29/1994
• Est. Priority Date: 08/08/1988
• Status: Expired due to Fees

• Current Assignee: Com-Net Ericsson Canada Corp., Com-Net Ericsson Critical Radio Systems, Inc.
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Childress, Jeffrey S., Hattey, David L.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): FAILE, ANDREW I
• Application Number:
  US08/135,582
• Time in Patent Office: 412 Days
• Field of Search: 455/11.1, 455/12.1, 455/17, 455/33.1, 455/33.4, 455/34.1, 455/34.2, 455/38.1, 455/51.1, 455/54.1, 455/54.2, 455/56.1, 455/68, 379/57-60, 379/63, 340/825.01, 340/825.05, 340/825.44, 340/825.52, 375/107-108, 375/114, 370/95.1, 370/110.1
• US Class Current: 455/17
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

In a trunked radio frequency communications system, a dynamic regrouping scheme includes an effective user interface, automatic support of multi-site systems, the capability to program individual radio transceivers with multiple new groups dynamically, a fast rate of reconfiguration, instantaneous switch over to prevent radios from residing in immature groups, and a satisfactory mode of operation should the site controller (or site controllers in non-fault tolerant systems) fail. Some of the dynamic regrouping features includes unlimited prestored plans and source and destination groups per plan, regrouping at the plan or destination group level, an advanced user interface, automatic support of multiple sites, fast regrouping at the rate of over 30 radios per second while reducing loading on the system control channel, and fast activation/deactivation. Each plan can be immediately activated or deactivated and users are effectively regrouped together. An alternate control channel is used to regroup transceivers to avoid undue main control channel loading and to increase rate of regrouping.

Claims

1. A method of dynamically regrouping radio transceivers in a trunked radio communications system having a digital RF control channel and also having at least one further RF channel for temporary use by said radio transceivers, said method including:

transmitting at least one message over said digital RF control channel directing said radio transceivers to said further RF channel;

transmitting a dynamic regroup message to said radio transceivers over said further RF channel, said dynamic regroup message specifying a group identification; and

dynamically programming, in response at least in part to receipt of said transmitted dynamic regroup message, said radio transceivers to respond to transmission of a message containing said group identification by said trunked radio communications system.

2. A method of dynamically regrouping radio transceivers in a trunked radio communications system having a digital RF control channel and at least one RF working channel, said method including:

generating a dynamic regroup message including;

(i) a group identification, and (ii) a regroup type definition field;

communicating said dynamic regroup message to said radio transceivers over said RF working channel;

storing said group identification in each said radio transceiver in response to said communicated dynamic regroup message; and

automatically selectively preventing operators of said radio transceivers from manually disabling said radio transceivers from responding to said group identification in response to said regroup type definition field.

3. A method as in claim 2 further including the step of automatically selectively initially selecting said group specified by said dynamic regroup message in response to said regroup type definition field.

4. A method of dynamically regrouping radio transceivers in a trunked radio communications system having a digital RF control channel and at least one further RF channel capable of being temporarily assigned for use by said radio transceivers, said radio transceivers having user control settings, said method including:

generating a dynamic regroup message including;

(i) a group identification, and (ii) a regroup type definition field;

communicating said dynamic regroup message to said radio transceivers over said further RF channel;

storing said group identification into said radio transceivers in response to said communicated dynamic regroup message; and

selectively controlling said radio transceivers to respond to said group identification regardless of the state of said radio transceiver user control settings depending upon the contents of said regroup type definition field.

5. A method of dynamically regrouping radio transceivers in a trunked radio communications system having a digital RF control channel and at least one further RF channel capable of being assigned for temporary use by said radio transceivers, said method including

specifying a dynamic regrouping plan;

storing indicia of said specified dynamic regrouping plan; and

subsequent to said storing step, implementing said dynamic regroup plan by;

transmitting, in response to said stored indicia, at least one message over said digital RF control channel directing said radio transceivers to said further RF channel, and

transmitting a dynamic regroup message to said radio transceivers over said further RF channel, said dynamic regroup message specifying a group identification, said transmitted dynamic regroup message dynamically controlling said radio transceivers to respond to said group identification.

6. A method of claim 5 wherein:

said specifying step includes specifying a plan number;

said implementing step further includes specifying said plane number; and

said dynamic regroup message transmitting step includes the step of transmitting said plane number as a part of said dynamic regroup message.

7. A method of dynamically regrouping a radio transceiver in a trunked radio communications system having a digital RF control channel and at least one further RF channel capable of being assigned for temporary use by said radio transceiver, said method including:

(a) receiving, at said radio transceiver, a dynamic regroup message including a radio identifying code over at least one of (a) said RF control channel, and (b) said further RF channel, said dynamic regroup message indicating a group identification;

(b) storing said radio identifying code at said radio transceiver;

(c) subsequently to said receiving step (a) and said storing step (b) receiving a dynamic regroup activate message transmitted over at least one of (a) said RF control channel, and (b) said further RF channel; and

(d) delaying activation of said stored radio identifying code at least until receipt of said dynamic regroup activate message.

8. A method of dynamically regrouping a radio transceiver in a trunked radio communications system having a digital RF control channel and at least one further RF channel capable of being assigned for temporary use by said radio transceiver said method including:

(a) receiving, at said radio transceiver, a dynamic regroup message over at least one of (a) said RF control channel, and (b) said further RF channel, said dynamic regroup message indicating a group identification;

(b) subsequent to said receiving step (a) further dynamic regroup activate message transmitted over at least one of (a) said RF control channel, and (b) said further RF channel; and

(d) begin using said group identification in response to receipt of said further message;

wherein said method further includes the preliminary step of transmitting a channel assignment message over said RF control channel directing said radio transceiver to said further RF channel so as to permit said radio transceiver to receive said dynamic regroup message over said further RF channel, and

said receiving step (a) comprises the step of receiving said dynamic regroup message transmitted over said further RF channel.

9. A method of dynamically regrouping plural radio transceivers in a trunked radio communications system having a digital RF control channel and at least one further RF channel capable of being assigned for temporary use by said radio transceivers, said method including:

(a) transmitting, over said trunked radio system to said plural radio transceivers, at least one dynamic regroup message specifying a regroup;

(b) making said regroup resident within said radio transceivers at least in part in response to receipt of said dynamic regroup message;

(c) subsequently to said step (b), transmitting a regroup activate message over said trunked radio system to said radio transceivers; and

(d) delaying activation of said resident regroup at least until receipt of said regroup activate message by said radio transceivers.

10. A method of dynamically reprogramming radio transceivers over the air in a trunked radio communications system including at least one mobile radio transceiver, said mobile radio transceiver having a memory device providing at least first and second storage locations, said method including:

receiving, over the air with said mobile radio transceiver, a first dynamic regroup identification;

storing said first regroup identification in said first storage location provided by said memory device in response to receipt of said first dynamic regroup message;

receiving, over the air with said mobile radio transceiver, a second regroup identification different from said first regroup identification;

storing said second regroup identification in said second storage location provided by said memory device in response to receipt of said second dynamic regroup message; and

responding to calls directed to any of said first and second regroups at least in part in response to said stored first and second regroup identifications.

11. A method of dynamically reprogramming radio transceivers over the air in a trunked radio communications system including at least one mobile radio transceiver, said mobile radio transceiver having a memory device providing at least first, second and third storage locations, said third storage location storing a permanent group identification that is not capable of being overwritten in response to receipt of messages over the air, said method including:

receiving, over the air with said mobile radio transceiver, a first dynamic regroup message specifying a corresponding first regroup identification;

storing said first regroup identification in said first storage location provided by said memory device in response to receipt of said first dynamic regroup message;

receiving, over the air with said mobile radio transceiver, a second dynamic regroup message specifying a corresponding second regroup identification;

storing said second regroup identification in said second storage location provided by said memory device in response to receipt of said second dynamic regroup message; and

responding to calls directed to any of said first and second regroups and said permanent group at least in part in response to said stored first and second regroup identifications and said permanent group identification.

12. A method of dynamic regrouping in a trunked radio communication system including at least one mobile transceiver, said method comprising:

transmitting plural dynamic regroup identifications over the air,

storing said plural dynamic regroup identifications within said mobile transceiver; and

selectively activating at least one of said stored plural dynamic regroup identifications, including the step of delaying said activation at least until receipt by said mobile transceiver of a further over-the-air message.

13. A method as in claim 12 wherein said transmitting step comprises transmitting N regroup identifications, and wherein said selectively activating step comprises transmitting a broadcasted over-the-air digital message having at least N bits, each of said N bits indicating the status of a different one of said N regroup identifications.

14. A method of dynamic regrouping in a trunked radio communication system including plural mobile transceivers, said method comprising:

transmitting at least one dynamic regroup message over the air so as to make said regroup resident within each of said plural mobile transceivers;

subsequently transmitting a regroup activate message over the air; and

substantially simultaneously activating said regroup at each of said plural mobile transceivers no earlier than transmission of said regroup activate message.

15. A method of dynamic regrouping in a trunked radio communication system including first and second mobile transceivers, said method comprising:

transmitting a first dynamic regroup message over the air to said first mobile radio transceiver so as to make said regroup resident within said first mobile transceiver;

transmitting a second dynamic regroup message over the air to said second mobile radio transceiver so as to make said regroup resident within said second mobile transceiver; and

subsequently transmitting a further message over the air to both said first and second mobile transceivers so as to substantially simultaneously activate said regroup at each of said first and second mobile transceivers.

16. A method of dynamic regrouping in a trunked radio communication system including first and second mobile transceivers, said method comprising:

(1) receiving a first dynamic regroup message over the air with said first mobile radio transceiver;

(2) making said regroup resident within said first mobile transceiver in response to receipt of said first message;

(3) receiving a second dynamic regroup message over the air to said second mobile radio transceiver;

(4) making said regroup resident within said second mobile transceiver in response to receipt of said second message;

(5) subsequently to said making steps (2) and (4), substantially simultaneously activating said regroup at each of said first and second mobile transceivers.

17. A method as in claim 16 wherein said activating step includes the steps of:

receiving a regroup activation message at each of said first and second mobile transceivers; and

p1 activating said regroup at each of said first and second mobile transceivers in response to said receipt of said regroup activation message.

18. A method of dynamic regrouping in a trunked radio communication system including first and second mobile transceivers, said method comprising:

receiving a first dynamic regroup message over the air with said first mobile radio transceiver;

making said regroup resident within said first mobile transceiver in response to receipt of said first message;

receiving a second dynamic regroup message over the air to said second mobile radio transceiver;

making said regroup resident within said second mobile transceiver in response to receipt of said second message;

subsequently substantially simultaneously activating said regroup at each of said first and second mobile transceivers,

wherein said system includes an RF control channel and at least one further channel, and wherein;

said method further includes transmitting each of said first and second dynamic regroup messages over said further channel; and

said activating step includes the step of transmitting a regroup activate message over said control channel.

19. In a trunked radio communications system having at least one mobile radio transceiver, a method of dynamically regrouping comprising:

providing at least one stored dynamic regroup code within said mobile radio transceiver;

receiving an activation message with said mobile radio transceiver over the air; and

activating said stored dynamic regroup code no earlier than receipt of said activation message.