US 8,797,970 B2Granted

Method and system for switching antenna and channel assignments in broadband wireless networks

AssigneeAdaptix, Inc.

InventorsGuanbin Xing, Manyuan Shen, Hui Liu

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Abstract

A method and apparatus for antenna switching, grouping, and channel assignments in wireless communication systems. The invention allows multiuser diversity to be exploited with simple antenna operations, therefore increasing the capacity and performance of wireless communications systems. Channel characteristics indicative of signal reception quality for downlink or bi-directional traffic for each channel/antenna resource combination are measured or estimated at a subscriber. Corresponding channel characteristic information is returned to the base station. Channel characteristics information may also be measured or estimated for uplink or bi-directional signals received at each of multiple receive antenna resources. The base station employs channel allocation logic to assign uplink, downlink and/or bi-directional channels for multiple subscribers based on channel characteristics measured and/or estimated for the uplink, downlink and/or bi-directional channels.

Claims12

Dependent claims

A method for wireless communication, said method comprising:

measuring, at a subscriber station, one or more channel characteristics of a plurality of orthogonal frequency division multiple access (OFDMA) subcarriers hosted by a first antenna resource and a second antenna resource located at a base station, wherein said one or more channel characteristics are indicative of reception quality for a corresponding OFDMA subcarrier of said plurality of OFDMA subcarriers, and wherein said first antenna resource and said second antenna resource include a plurality of antennas;
sending, from said subscriber station, to said base station, data corresponding to said measured one or more channel characteristics;
receiving, at said subscriber station, notification of an assignment of one or more OFDMA subcarriers of said plurality of OFDMA subcarriers, wherein said assignment is based at least on said measured one or more channel characteristics of said first antenna resource and said second antenna resource, and wherein at least one OFDMA subcarrier of said plurality of OFDMA subcarriers of said assignment is different from said first antenna resource and said second antenna resource;
updating, periodically, said measured one or more channel characteristics by periodically measuring, at said subscriber station, said one or more channel characteristics of said plurality of OFDMA subcarriers hosted by said first antenna resource and said second antenna resource of said base station;
sending, periodically, from said subscriber station to said base station, updated data corresponding to said periodically measured one or more channel characteristics;
and
receiving notification of reassignments of one or more reassigned OFDMA subcarriers of said plurality of OFDMA subcarriers, wherein said reassignments are based at least on said updated measured one or more channel characteristics of said first antenna resource and said second antenna resource.

4 more elements

A subscriber station for wireless communication, said subscriber station comprising:

a controller configured to:
measure one or more channel characteristics of a plurality of orthogonal frequency division multiple access (OFDMA) subcarriers hosted by a first antenna resource and a second antenna resource located at a base station, wherein said one or more channel characteristics are indicative of reception quality for a corresponding OFDMA subcarrier of said plurality of OFDMA subcarriers, and wherein said first antenna resource and said second antenna resource include a plurality of antennas;
and
update, periodically, said measured one or more channel characteristics by periodically measuring said one or more channel characteristics of said plurality of OFDMA subcarriers hosted by said first antenna resource and said second antenna resource of said base station;
and
a transceiver configured to:
send, to said base station, data corresponding to said measured one or more channel characteristics;
receive notification of an assignment of one or more OFDMA subcarriers of said plurality of OFDMA subcarriers, wherein said assignment is based at least on said measured one or more channel characteristics of said first antenna resource and said second antenna resource;
and wherein at least one OFDMA subcarrier of said plurality of OFDMA subcarriers of said assignment is different from said first antenna resource and said second antenna resource;
send, periodically, to said base station, updated data corresponding to said periodically measured one or more channel characteristics;
and
receive notification of reassignments of one or more reassigned OFDMA subcarriers of said plurality of OFDMA subcarriers, wherein said reassignments are based at least on said updated measured one or more channel characteristics of said first antenna resource and said second antenna resource.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/498,924Filed 7 Jul 2009 · continuation
Priority: 7 Dec 2004
Published: US 2009/0274059 A15 Nov 2009
Granted: 5 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H04L 5/06
Channels characterised by the type of signal: the signals being represented by different frequencies
H04B 7/0613
At the transmitting station: using simultaneous transmission
H04B 17/382
Of propagation channels: for resource allocation, admission control or handover
H04L 5/023
Channels characterised by the type of signal: multiplexing of multicarrier modulation signals, e.g. multi-user orthogonal frequency division…

Family

Application11/007,064Parent of this continuation · filed 7 Dec 2004
US 2009/0274059 A1Pre-grant publication · published 5 Nov 2009
US 7,573,851 B2Parent of this continuation
US 2006/0120395 A1Published application
US 8,797,970 B2This patent

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