Method and apparatus for providing fair access in a group communication system in which users experience differing signaling delays

• US 6,301,263 B1
• Filed: 03/24/1999
• Issued: 10/09/2001
• Est. Priority Date: 03/24/1999
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Maggenti, Mark
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): Sam, Phirin
• Application Number:
  US09/275,698
• Time in Patent Office: 930 Days
• Field of Search: 370/462, 370/316, 370/319, 370/328, 370/338, 370/341, 370/329, 370/348, 370/522, 370/461, 370/447, 455/404, 455/415, 455/427, 455/405, 455/519, 455/500, 455/518
• US Class Current: 370/462
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 72/30 Resource management for broadcast 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

A method and apparatus for providing fair access to members of a group communication system in which the members experience differing signaling delays. Members of the communication system send a transmission request to an arbitration device when they wish to communicate with other members. The transmission requests are ultimately received by the arbitration device. A time window is opened by a processor located at the arbitration device at the time an initial transmission request is received. The time window is used to treat all transmission requests that are received within the time window as having been received at the same time. Any transmission requests that are received within the time window are included in determining which member should be granted an exclusive transmission privilege.

Claims

1. Method for providing fair access to members of a group communication system in which members experience differing signaling delays, comprising the steps of:

receiving an initial transmission request from a first member by an arbitration device;

opening a time window in response to said initial transmission request;

receiving a second transmission request from a second member by said arbitration device;

determining whether or not said second transmission request was received within said time window; and

including said initial transmission request and said second transmission request in determining which member should be granted an exclusive transmission privilege if said second transmission request was received within said time window.

2. Method of claim 1 wherein the step of receiving a first transmission request comprises the step of storing identification information corresponding to said first member.

3. Method of claim 1 wherein the step of receiving a second transmission request comprises the step of storing identification information corresponding to said second member.

4. Method of claim 1 wherein the step of determining whether or not said second transmission request was received within said time window comprises the steps of:

determining whether or not said time window has closed; and

storing information relating to said second member if said time window has not closed.

5. Apparatus for providing fair access to members of a group communication system in which members experience differing signaling delays, comprising:

a receiver for receiving an initial transmission request from a first member and a second transmission request from a second member;

a memory for storing information relating to said initial transmission request and said second transmission request;

a timer for determining when a time window has closed; and

a processor connected to said receiver, to said memory, and to said timer for including said initial transmission request and said second transmission request in determining which member should be granted an exclusive transmission privilege, if said second transmission request is received within said time window.

6. Apparatus of claim 5 wherein said information comprises identification information relating to said first member and said second member.