Multi-site dispatching system cell registration

• US 5,054,110 A
• Filed: 12/29/1989
• Issued: 10/01/1991
• Est. Priority Date: 12/29/1989
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Sobti, Arun, Comroe, Richard A., Major, John E.
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): BELZER, CHRISTINE
• Application Number:
  US07/459,024
• Time in Patent Office: 641 Days
• Field of Search: 455/33, 455/34, 455/54, 455/56, 379/59, 379/60, 379/63
• US Class Current: 455/435.1
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource

Abstract

A trunked communication system wherein less than all of the communication units may transmit an identifying data word thereby registering their location to a system controller every time they enter a different coverage area, while the remainder of the communication units do not. The identity of the communication units which operate in each mode is known to the system resource controller in advance. Pre-registration allows the system controller to know the locale of target units in advance when communications to those units is requested. The locale of units that do no pre-register their location are identified through system wide paging. Coordinating the identification of locales of units in both modes permits greater optimization of spectral resources.

Claims

1. A communication system having:

A) a plurality of communication units;

B) a plurality of base sites;

C) a service coverage area for each base site

D) at least one target mobile communication unit;

E) a data base; and

wherein the plurality of communication units includes at least one communication unit constructed to pre-register within the data base its location by transmitting an identifying data word based upon either one of activation or upon entry into the service coverage area of a base site; and

wherein a resource controller allocates communication resources between a requesting communication unit and the target communication unit based upon either one of the location of the target stored in the data base or based upon a location of the target identified through the issuance of a system-wide page;

and wherein each base site includes;

A) a service coverage area,

B) a plurality of transceiver resources,

C) control resource receiver means for receiving a transmitted data word and thereby registering the presence of a communication unit within the coverage area of the base site.

2. The communication system as recited in claim 1, wherein the time to access a target communication unit is reduced when the target communication unit has pre-registered its presence within the communication system.

3. A method of assigning communication resources to communication units in a communication system having:

A) a plurality of communications resources;

B) a plurality of base sites;

C) a service coverage area for each base site;

E) at least one target communication unit;

F) a data base;

the method comprising the steps of;

A) providing within each base site a control resource receiver means to receive a data word from mobile communication units and thereby to register the presence of the communication units within the coverage area of the cell;

B) providing a data base to store the locale of potential target communication units;

C) receiving from a first communication unit, a request to communicate with at least one target communication unit;

D) searching the data base to identify the locale of the target communication unit;

E) issuing a system-wide page to identify the locale of a the target communication unit when the target has not preregistered its locale;

F) providing a communication resource between the first communication unit and the target unit based on the use of the previously stored locational data or the results of the system-wide page.

4. The method as recited in claim 3, wherein the time to access a target communication units is reduced when the target communication unit has pre-registered its presence within the communication system.