US 10,873,930 B2Granted

Framing for an adaptive modulation communication system

AssigneeWi-LAN, Inc.

InventorsKenneth L. Stanwood, Israel Jay Klein, George Lin, An Chen

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Abstract

A system and method for mapping a combined frequency division duplexing (FDD) Time Division Multiplexing (TDM)/Time Division Multiple Access (TDMA) downlink subframe for use with half-duplex and full-duplex terminals in a communication system. Embodiments of the downlink subframe vary Forward Error Correction (FEC) types for a given modulation scheme as well as support the implementation of a smart antenna at a base station in the communication system. Embodiments of the system are also used in a TDD communication system to support the implementation of smart antennae. A scheduling algorithm allows TDM and TDMA portions of a downlink to efficiently co-exist in the same downlink subframe and simultaneously support full and half-duplex terminals.

Claims10

Dependent claims

A method of communication between a base station and a plurality of cellular telephones, comprising:

grouping the plurality of cellular telephones into groups by the downlink (DL) physical (PHY) mode in which they will receive DL data;
encoding, at the base station, for cellular telephones scheduled to receive DL data in a DL frame and for cellular telephones scheduled to transmit data in an uplink (UL) frame using a PHY mode compatible with cellular telephones scheduled to receive DL data in a DL frame and for cellular telephones scheduled to transmit data in an uplink (UL) frame:
synchronization information,
information about DL transmission resources allocated to the cellular telephones scheduled to receive DL data in the DL frame, including what portion of the DL transmission resources allocated to the cellular telephones is allocated for each of the cellular telephones scheduled to receive DL data in the DL frame, a DL transmission resource being associated with a DL PHY mode,
information about UL transmission resources allocated to cellular telephones scheduled to transmit data in the UL frame, including what portion of the UL transmission resources allocated to the cellular telephones is allocated for each of the cellular telephones scheduled to transmit UL data in the UL frame, an UL transmission resource being associated with an UL PHY mode, wherein the UL transmission resources are allocated to the cellular telephones such that the UL transmission resources allocated to cellular telephones belonging to the same group are kept contiguous in time, and
encoding the DL data using the associated DL PHY mode in the DL frame;
transmitting, from the base station, the DL frame, the encoded synchronization information, the encoded information about DL transmission resources and the encoded information about UL transmission resources, to the plurality of cellular telephones;
and
receiving, at the base station, from at least one cellular telephone, UL data in the UL transmission resource of the UL frame according to the UL PHY mode.

6 more elements

A wireless system comprising:

a base station comprising
a transmitter and
a receiver,
the base station enabled to,
group a plurality of cellular telephones into groups by the downlink (DL) physical (PHY) mode in which they will receive DL data,
encode, for cellular telephones scheduled to receive DL data in a DL frame and for cellular telephones scheduled to transmit data in an uplink (UL) frame:
synchronization information,
information about DL transmission resources allocated to the cellular telephones scheduled to receive DL data in the DL frame, including what portion of the DL transmission resources allocated to the cellular telephones is allocated for each of the cellular telephones scheduled to receive DL data in the DL frame, a DL transmission resource being associated with a DL PHY mode,
information about UL transmission resources allocated to cellular telephones scheduled to transmit data in the UL frame, including what portion of the UL transmission resources allocated to the cellular telephones is allocated for each of the cellular telephones scheduled to transmit UL data in the UL frame, an UL transmission resource being associated with an UL PHY mode, wherein the UL transmission resources are allocated to the cellular telephones such that the UL transmission resources allocated to cellular telephones belonging to the same group are kept contiguous in time, and
the DL data using the associated DL PHY mode in the DL frame including
packing and fragmenting variable length MAC messages based on the information about the DL transmission resource allocated to the cellular telephone in the DL frame and error encoding and
modulating the MAC messages based on the DL PHY mode provided by the information about the DL transmission resource allocated to the cellular telephone in the DL frame,
transmit the DL frame, the encoded synchronization information, the encoded information about DL transmission resources and the encoded information about UL transmission resources, to the plurality of cellular telephones, and
receive, from at least one cellular telephone, UL data in the UL transmission resource of the UL frame according to the UL PHY mode.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/644,320Filed 7 Jul 2017 · continuation
Priority: 15 Nov 2000
Published: US 2017/0311300 A126 Oct 2017
Granted: 22 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 72/23
Control channels or signalling for resource management: in the downlink direction of a wireless link, i.e. towards a terminal
H04B 7/15557
Ground-based stations: selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
H04B 7/212
Multiple access: time-division multiple access [TDMA]
H04B 7/2615
At least one of which is mobile: using hybrid frequency-time division multiple access [FDMA-TDMA]

Family

Application60/249,065Us provisional application · filed 15 Nov 2000
Application09/991,532Parent of this division · filed 15 Nov 2001
Application11/674,548Parent of this continuation · filed 13 Feb 2007
US 7,197,022 B2Parent of this division · filed 27 Mar 2007
Application12/035,549Parent of this continuation · filed 22 Feb 2008
US 7,379,441 B2Parent of this continuation · filed 27 May 2008
Application13/427,692Parent of this continuation · filed 22 Mar 2012
US 8,165,046 B2Parent of this continuation · filed 24 Apr 2012
Application13/903,712Parent of this continuation · filed 28 May 2013
US 8,462,673 B2Parent of this continuation · filed 11 Jun 2013
Application14/835,471Parent of this continuation · filed 25 Aug 2015
US 9,191,940 B2Parent of this continuation · filed 17 Nov 2015
US 2017/0311300 A1Pre-grant publication · published 26 Oct 2017
US 10,117,234 B2Parent of this continuation
Application11/674,548Parent of this division
US 2002/0118666 A1Published application
US 2007/0133481 A1Published application
US 2008/0144585 A1Published application
US 2012/0182952 A1Published application
US 2013/0265913 A1Published application
US 2015/0365927 A1Published application
US 9,713,137 B2Related patent
US 10,873,930 B2This patent

From the US filing history. Foreign family members aren’t listed.

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