Analog beamforming to reduce interference in WiMAX networks
First Claim
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1. A method for communicating in a wireless network including a base station (BS) and a set of mobile stations (MSs) located in a cell, comprising the base station performing steps of the method, comprising the steps of:
- specifying a time and a subchannel for transmitting at least one sounding signal in a uplink map of a downlink subframe of a superframe, wherein the superframe includes the downlink subframe and an uplink subframe and the downlink subframe further includes a downlink map and an uplink map;
broadcasting a set of sounding requests using a set of beams after the downlink map and the uplink map during a period when no beams are formed in the downlink subframe, wherein there is one beam for each sounding request;
measuring qualities of sounding signals transmitted by the set of MSs in response to receiving the set of sounding requests; and
grouping the set of MSs into subsets according to the qualities, wherein there is one subset associated with each beam.
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Abstract
A base station transmits a set of sounding requests to a set of mobile station (MS) in a cell, using a set of beams, wherein there is one beam for each sounding request. Qualities of sounding signals transmitted by the set of MSs in response to receiving the sounding request are measured, and the set of MSs are grouped into subsets according to the qualities, wherein there is one subset of MSs associated with each beam.
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12 Claims
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1. A method for communicating in a wireless network including a base station (BS) and a set of mobile stations (MSs) located in a cell, comprising the base station performing steps of the method, comprising the steps of:
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specifying a time and a subchannel for transmitting at least one sounding signal in a uplink map of a downlink subframe of a superframe, wherein the superframe includes the downlink subframe and an uplink subframe and the downlink subframe further includes a downlink map and an uplink map; broadcasting a set of sounding requests using a set of beams after the downlink map and the uplink map during a period when no beams are formed in the downlink subframe, wherein there is one beam for each sounding request; measuring qualities of sounding signals transmitted by the set of MSs in response to receiving the set of sounding requests; and grouping the set of MSs into subsets according to the qualities, wherein there is one subset associated with each beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification