Wireless access system using multiple modulation formats in TDD frames and method of operation

• US 20090285134A1
• Filed: 02/06/2007
• Published: 11/19/2009
• Est. Priority Date: 01/19/2001
• Status: Abandoned Application

• Current Assignee: Raze Technologies, Inc.
• Original Assignee: Raze Technologies, Inc.
• Inventors: Nelson, Robert R., McKown, Russell C., Struhsaker, Paul F.
• Application Number:
  US11/702,951
• Publication Number:
  US 20090285134A1
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 5/0005 Time-frequency

Abstract

There is disclosed a radio frequency (RF) modem shelf for use in a fixed wireless access network comprising a plurality of base stations capable of bidirectional time division duplex (TDD) communication with wireless access devices disposed at a plurality of subscriber premises. The radio frequency (RF) modem shelf comprises: a) a first RF modem for communicating with a plurality of the wireless access devices using TDD frames, each TDD frame having an uplink for receiving data and a downlink for transmitting data; and b) a modulation controller associated with the RF modem shelf for determining an optimum modulation configuration for each of the plurality of wireless access devices communicating with the first RF modem. The modulation controller causes the first RF modem to transmit downlink data to a first wireless access device in a first data, block having a first optimum modulation configuration and to transmit downlink data to a second wireless access device in a second data block having a different second optimum modulation configuration.

Claims

1. For use in a wireless access network comprising a plurality of base stations capable of bidirectional time division duplex (TDD) communication with a plurality of wireless access devices, a radio frequency (RF) modem shelf comprising:

a modem communicating with the plurality of wireless access devices using TDD frames, each TDD frame having an uplink portion for receiving data and a downlink portion for transmitting data; and

a controller associated with uthe modem shelf determining an optimum modulation configuration for each of the wireless access devices communicating with the modem, wherein the modulation controller causes the modem to transmit downlink data to a first wireless access device among the plurality of wireless access devices in a first data block having a first modulation configuration and to transmit downlink data to a second wireless access device among the plurality of wireless access devices in a second data block having a different second modulation configuration.

2-16. -16. (canceled)