System controlled asymmetrical automatic repeat request protocol

• US 6,069,886 A
• Filed: 12/22/1997
• Issued: 05/30/2000
• Est. Priority Date: 01/05/1996
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Ayerst, Douglas I., Rudowicz, Michael J., Khan, Malik J.
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Elallam, Ahmed
• Application Number:
  US08/995,625
• Time in Patent Office: 890 Days
• Field of Search: 370/310, 370/312, 370/313, 370/329, 370/336, 370/337, 370/343, 370/345, 370/347, 370/348, 370/349, 370/473
• US Class Current: 370/336
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 88/187 using digital or pulse address codes

Abstract

A two-way wireless selective call communication system (20) using a synchronous time division multiplex communication protocol transmits messages divided into a plurality of data units (120, 126, and 128) from a plurality of selective call transceivers (32) to a paging terminal (33) during time slots (78), the number of data units and the time slots are set by the paging terminal controller (26) based on information, including size of the message information, received in an unscheduled transmission from each of the plurality of selective call transceivers. The paging terminal transmits to a selective call transceiver a multi-bit acknowledgment message having a one-bit acknowledgment for each of the plurality of data units. A selective call transceiver re-transmits data units not recovered by the terminal based upon content of the acknowledgment message. More than one selective call transceiver transmit during a one time slot set by the terminal.

Claims

1. A synchronous time division multiplex two-way wireless communication system having a controller and a plurality of portable selective call transceivers for communicating messages from the plurality of portable selective call tranceivers to the controller during time slots assigned by the controller, the synchronous time division multiplex two-way wireless communication system having at least one transmitter and a plurality of fixed receivers, the messages divided into a plurality of data units, comprising:

memory at the controller for storing geographical location of each of the plurality of fixed receivers;

a cell site controller at the controller coupled to each of the plurality of fixed receivers for providing a signal quality indication signal for a most recently received wireless transmissions from each of the plurality of portable selective call transceivers; and

a message handler at the controller for scheduling simultaneous wireless transmissions of at least one data unit from each of at least two portable selective call transceivers of the plurality of portable selective call transceivers during a one time slot in response to the signal quality indication signal for a most recently received wireless transmission from each of the at least two portable selective call transceivers.