Dynamic adaptive modulation negotiation for point-to-point terrestrial links

• US 20020101913A1
• Filed: 09/28/2001
• Published: 08/01/2002
• Est. Priority Date: 07/28/1999
• Status: Abandoned Application

• Current Assignee: Axxcelera Broadband Wireless, Inc. (Moseley Wireless Solutions Group)
• Original Assignee: Axxcelera Broadband Wireless, Inc. (Moseley Wireless Solutions Group)
• Inventors: Molina, Victor Hugo, Yurtkuran, Erol Kenneth, Masters, Jeffrey Tony, Ho, Shin-Fang
• Application Number:
  US09/967,479
• Publication Number:
  US 20020101913A1
• Time in Patent Office: Days
• US Class Current: 375/219
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission

Abstract

A transmission device that transmits a signal along a link and method therefor that includes a forward error correction encoder unit to insert error correction information into the signal transmitted along a link and output a corresponding encoded signal. A modulation unit variably modulates the encoded signal and outputs a modulated signal, having a corresponding quadrature amplitude modulation index, to the receiving device. A control unit variably controls the inserted forward error correction information and the quadrature amplitude modulation index based on link quality information with respect to substantially the entire link to increase throughput during periods of reduced environmental degradation.

Claims

1. An apparatus to communicate with at least one remote device, the apparatus transmitting information over a first channel and receiving information over a second channel, the apparatus comprising:

a controller to process link quality information regarding the second channel and first link control information regarding the first channel, the controller adjusting at least one parameter of the first channel based on the first link control information and generating second link control information regarding the second channel based on the link quality information.