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

摘要

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 subscriber premises. The shelf comprises: a) a first RF modem for communicating with 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 wireless access devices communicating with the first RF modem. The 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.

主权项

1. A system for communicating with a plurality of wireless access devices, comprising:
at least one modem that communicates with the plurality of wireless access devices using time division duplex (TDD) frames, each TDD frame having an uplink portion for receiving data and a downlink portion for transmitting data; and at least one controller associated with the at least one modem that assigns each of the plurality of wireless access devices to at least one of a plurality of modulation groups, determines a modulation configuration for each of the plurality of modulation groups, and causes the at least one modem to transmit downlink data in a downlink portion of a TDD frame to wireless access devices assigned to a first of the plurality of modulation groups using a first modulation configuration and transmit downlink data in the downlink portion of the TDD frame to wireless access devices assigned to a second of the plurality of modulation groups using a second modulation configuration, wherein each of at least one of the plurality of modulation groups has at least two of the plurality of wireless access devices assigned to the each of the at least one of the plurality of modulation groups, and wherein the first modulation configuration is different from the second modulation configuration.