Method of automatic path map generation for simulcast transmission system

• US 5,212,807 A
• Filed: 03/28/1991
• Issued: 05/18/1993
• Est. Priority Date: 03/28/1991
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Chan, Hang K.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): URBAN, EDWARD F
• Application Number:
  US07/678,878
• Time in Patent Office: 782 Days
• Field of Search: 455/33, 455/51, 455/54, 455/56, 455/67, 455/33.1, 455/33.4, 455/51.1, 455/51.2, 455/54.1, 455/56.1, 455/67.1, 455/67.6
• US Class Current: 455/525
• CPC Class Codes: H04H 20/67 Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency

Abstract

A method of automatic path map generation (600) for use in a simulcast transmission system is disclosed which has at least three transmitter sites which form a first communication loop (403). The first communication loop has at least a first and a second audio path. A first audio path originates from a primary transmitter site (402), passes first through a first transmitter site, and ends at a second transmitter site. A second audio path originates from the primary site (402), passes first through the second transmitter site, and ends at the first transmitter site. The first audio path is associated with a first path condition, and the second audio path is associated with a second path condition. The method employed includes establishing (601) a logical representation of the simulcast transmission system. Then, selecting (605) one of the at least three transmitter sites for which a path map is to be generated, determines (902) a logical relationship between the primary transmitter site (402) and the selected transmitter site. Knowing this, the primary site (402) is able to calculate (708) a data set identification (ID) for the selected transmitter site that is associated with each of at least the first and the second path conditions. These data set IDs are then recorded (918) for the selected transmitter site, to produce a path map describing a unique association between each of at least the first and the second path conditions and the data set ID.

Claims

1. A method of automatically mapping delay parameters with particular path conditions, the method being employed in a network control device of a simulcast transmission system having at least three transmitter sites which form a first communication loop having at least a first and a second audio path, the first audio path originating from a primary transmitter site, passing first through a first transmitter site, and ending at a second transmitter site, a second audio path originating from the primary site, passing first through the second transmitter site, and ending at the first transmitter site, the first audio path being associated with a first path condition, the second audio path being associated with a second path condition, the method comprising the steps of:

selecting one of the at least three transmitter sites for which a path map is to be generated to produce a selected transmitter site;

determining a logical relationship between the primary transmitter site and said selected transmitter site;

calculating, based on said logical relationship, a data set identification (ID) containing delay parameters for said selected transmitter site and associated with each of the at least first and the second path conditions; and

recording said data set ID for said selected transmitter site, whereby a path map describing a unique association between each of at least the first and the second path conditions and said data set ID is produced.

2. A method of automatic path map generation in accordance with claim 1, further comprising the step of broadcasting said path map to at least the first and the second transmitter sites.

3. A method of automatically mapping delay parameters with particular path conditions, the method being employed in a network control device of a simulcast transmission system having at least a primary, a first, and a second transmitter site which are coupled, via communication links, to form a first communication loop, the first communication loop being coupled to a second communication loop via a common transmitter site among the first and the second communication loop, the second communication loop having at least a third and a fourth transmitter site, a first audio path originating from the primary transmitter site, passing first through the first transmitter site, through the common transmitter site, then passing through the third transmitter site, a second audio path originating from the primary transmitter site, passing first through the first transmitter site, through the common transmitter site, then passing through the fourth transmitter site, a third audio path originating from the primary transmitter site, passing first through the second transmitter site, through the common transmitter site, then passing through the third transmitter site, a fourth audio path originating from the primary transmitter site, passing first through the second transmitter site, through the common transmitter site, then passing through the fourth transmitter site, each of the first, second, third, and fourth audio paths being associated with a path condition, the method comprising the steps of:

determining, based on said logical representation, a minimum number of possible path conditions for the simulcast transmission system;

selecting one of the transmitter sites for which a path map is to be generated to produce a selected transmitter site;

determining a logical relationship between the primary transmitter site and said selected transmitter site;

calculating, based on said logical relationship, a data set identification (ID) containing delay parameters for said selected transmitter site and associated with each of the at least the first, second, third, and fourth path conditions; and

recording said data set ID for said selected transmitter site, whereby a path map describing a unique association between each of at least the first, second, third, and fourth path conditions and said data set ID is produced.