US 2012/0076031 A1 · RESOURCE ALLOCATION TO USERS IN SLOTTED CODE DIVISION MULTIPLE ACCESS SYSTEMS USING BEAMS

Abstract

The invention includes several embodiments for slot assignment in code division multiple access communication systems. One embodiment for fixed beams assigns slots by first detecting a beam having the best received quality and selected the best slot from that beam. Another fixed beam embodiment determines the best slot or slots in a number of beams and determines the overall best beam/slot combination. Another fixed beam embodiment uses a modified interference factor. One embodiment for the uplink using adaptive arrays using a spatial analysis stage followed by a transmission power level estimation stage. An overall interference level associated with each slot is determined and a slot having the best overall quality is determined. Another embodiment for the downlink uses the spatial analysis and slot assignment of the uplink for the downlink. Another embodiment for the downlink uses a spatial and transmission power level estimation stages.

Claims6

Dependent claims

A wireless transmit/receive unit (WTRU) comprising:

circuitry configured to select weights associated with a beam from a plurality of potential beams;
wherein the circuitry is further configured to derive a quality measurement for each of a plurality of downlink resources based on the selected beam;
wherein the quality measurement of the plurality of resources and the selected weights associated with the beam are utilized for communicating data between a base station and the WTRU.

Dependencies are inferred from the claim text.

Facts

Application

13/308,970Filed 1 Dec 2011

Priority

13 May 2002

Published

29 Mar 2012

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04W 72/541
Based on quality criteria: using the level of interference
H04B 7/0408
Using two or more spaced independent antennas: using two or more beams, i.e. beam diversity
H04B 7/0617
Of weighted versions of same signal: for beam forming
H04B 7/086
Weighted combining: using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Family

Application60/378,161Us provisional application · filed 13 May 2002

Application10/437,164Division · filed 13 May 2003

Application12/561,567Continuation · filed 17 Sep 2009

Application13/308,970Continuation

Application12/561,567Division

US 2004/0037263 A1Published application

US 2010/0056168 A1Published application

US 7,602,760 B2Related patent

US 9,380,588 B2Related patent

US 2012/0076031 A1This patent

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

Resource allocation to users in slotted code division multiple access systems using beams

Life of this patent

Resource allocation to users in slotted code division multiple access systems using beams

Life of this patent

Abstract

Claims6