Massive MIMO multi-user beamforming and single channel full duplex for wireless networks
First Claim
1. A method for wireless networking comprising one or more base stations (BSs) with Nbs antennas;
- two or more small cells (SCs) in the range of a BS where a SC has Nsc antennas, uses Nsc1≦
Nsc antennas for communication with a BS and uses Nsc2<
Nsc antennas for communication with one or more user equipment (UEs);
which comprises;
the BS estimating the channel matrix of the channels between the BS and the two or more SCs Hb-s by having the SCs transmits uplink (UL) pilot signals, and using channel reciprocity to estimate the downlink channel from the BS to the SCs;
at the same time the BS transmitting downlink (DL) signals to K SCs using multi-user transmit beamforming (BF) in a frequency channel where K>
1 and Nbs≧
KNsc1, a SC simultaneously transmitting DL signals to the one or more UEs in its range using the same frequency channel; and
at the same time the BS receiving UL signals from K SCs using multi-user receive BF in a frequency channel where K>
1 and Nbs≧
KNsc1, the SC simultaneously receiving UL signals from the one or more UEs in its range using the same frequency channel;
wherein said transmitting DL signals to the one or more UEs uses a first frequency channel at one time slot, and wherein said receiving UL signals from UEs uses the same first frequency channel at another time slot in a Time-Division Duplexing network.
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Abstract
This invention presents a method and apparatuses for wireless networking comprising one or more BS with Nbs antennas; two or more SCs in the range of a BS where a SC has Nsc antennas, uses Nsc1≦Nsc antennas for communication with a BS and uses Nsc2≦Nsc antennas for communication with one or more UEs; at the same time a BS transmitting DL signals to K SCs using multi-user transmit BF in a frequency channel, a SC simultaneously transmitting DL signals to one or more UEs in its range using the same frequency channel; and, at the same time a BS receiving UL signals from K SCs using multi-user receive BF in a frequency channel, a SC simultaneously receiving UL signals from one or more UEs in its range using the same frequency channel. Furthermore, beamforming using antennas on the SCs is performed to reduce the inter-SC interferences.
83 Citations
17 Claims
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1. A method for wireless networking comprising one or more base stations (BSs) with Nbs antennas;
- two or more small cells (SCs) in the range of a BS where a SC has Nsc antennas, uses Nsc1≦
Nsc antennas for communication with a BS and uses Nsc2<
Nsc antennas for communication with one or more user equipment (UEs);
which comprises;the BS estimating the channel matrix of the channels between the BS and the two or more SCs Hb-s by having the SCs transmits uplink (UL) pilot signals, and using channel reciprocity to estimate the downlink channel from the BS to the SCs; at the same time the BS transmitting downlink (DL) signals to K SCs using multi-user transmit beamforming (BF) in a frequency channel where K>
1 and Nbs≧
KNsc1, a SC simultaneously transmitting DL signals to the one or more UEs in its range using the same frequency channel; andat the same time the BS receiving UL signals from K SCs using multi-user receive BF in a frequency channel where K>
1 and Nbs≧
KNsc1, the SC simultaneously receiving UL signals from the one or more UEs in its range using the same frequency channel;wherein said transmitting DL signals to the one or more UEs uses a first frequency channel at one time slot, and wherein said receiving UL signals from UEs uses the same first frequency channel at another time slot in a Time-Division Duplexing network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- two or more small cells (SCs) in the range of a BS where a SC has Nsc antennas, uses Nsc1≦
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16. An apparatus for wireless networking comprising a baseband and radio frequency components supporting Nbs antennas;
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wherein the apparatus can communicate wirelessly with two or more small cells (SCs) in the range of the apparatus where a SC has Nsc antennas and use Nsc1≦
Nsc antennas for communication with the apparatus and Nsc2≦
Nsc antennas for communication with one or more user equipment (UEs);wherein a base stations (BS) estimates the channel matrix of the channels between the BS and the two or more SCs Hb-s by having SCs transmits uplink (UL) pilot signals, and uses channel reciprocity to estimate the downlink channel from the BS to the SCs; wherein, at the same time the apparatus is transmitting DL signals to K SCs using multi-user transmit beamforming (BF) in a frequency channel where K>
1 and Nbs≧
KNsc1, the SC is simultaneously transmitting DL signals to the one or more UEs in its range using the same frequency channel;wherein, at the same time the apparatus is receiving UL signals from K SCs using multi-user receive beamforming (BF) in a frequency channel where K>
1 and Nbs≧
KNsc1, the SC is simultaneously receiving UL signals from the one or more UEs in its range using the same frequency channel; andwherein said transmitting DL signals to the one or more UEs uses a first frequency channel at one time slot, and wherein said receiving UL signals from UEs uses the same first frequency channel at another time slot in a Time-Division Duplexing network.
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17. An apparatus for wireless networking comprising a baseband and radio frequency components supporting Nsc antennas,
wherein the apparatus uses Nsc1≦ - Nsc antennas for communication with a base stations (BS) with Nbs antennas and uses Nsc2≦
Nsc antennas for communication with one or more user equipment (UEs);wherein two or more of the apparatuses communicate wirelessly with the BS; wherein a BS estimates the channel matrix of the channels between the BS and the two or more small cells (SCs) Hb-s by having SCs transmits uplink (UL) pilot signals, and uses channel reciprocity to estimate the downlink channel from the BS to the SCs; wherein, at the same time the BS is transmitting DL signals to K apparatuses using multi-user transmit beamforming (BF) in a frequency channel where K>
1 and Nbs≧
KNsc1, the apparatus simultaneously is transmitting DL signals to the one or more UEs in its range using the same frequency channel; and
, at the same time the BS is receiving UL signals from K apparatuses using multi-user receive beamforming (BF) in a frequency channel where K>
1 and Nbs≧
KNsc1, the apparatus is simultaneously receiving UL signals from the one or more UEs in its range using the same frequency channel; andwherein said transmitting DL signals to the one or more UEs uses a first frequency channel at one time slot, and wherein said receiving UL signals from UEs uses the same first frequency channel at another time slot in a Time-Division Duplexing network.
- Nsc antennas for communication with a base stations (BS) with Nbs antennas and uses Nsc2≦
Specification