# US 11,444,822 B2 · Procedures to control beamforming

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- Number: US 11,444,822 B2
- Document ID: US11444822B2
- Status: Granted
- Kind: B2
- Application number: 16/900,136
- Filed: 2020-06-12
- Published: 2020-09-24
- Granted: 2022-09-13
- Earliest claimed: 2016-05-13
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Applicants: Telefonaktiebolaget LM Ericsson (publ)
- Inventors: Torgny Palenius; Robert Baldemair; Martin Hessler; Eleftherios Karipidis; Bo Lincoln; Eliane Semaan
- Web page: https://patentgrep.com/patent/US11444822B2

## CPC

- H04L 41/0233: Object-oriented techniques, for representation of network management data, e.g. common object request broker architecture [CORBA]
- H04B 7/0617: {for beam forming}
- H04B 7/06956: {using a selection of antenna panels}
- H04J 11/0056: {Inter-base station aspects}
- H04J 11/0059: {Out-of-cell user aspects}
- H04J 11/0079: {Acquisition of downlink reference signals, e.g. detection of cell-ID}
- H04L 41/0816: the condition being an adaptation, e.g. in response to network events
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 52/0229: {where the received signal is a wanted signal}
- H04W 52/0245: {according to signal strength}
- H04W 52/0251: {using monitoring of local events, e.g. events related to user activity}
- H04W 52/0274: {by switching on or off the equipment or parts thereof}
- H04W 52/028: {switching on or off only a part of the equipment circuit blocks}
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04L 1/0041: {Arrangements at the transmitter end}
- H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)}
- H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)}
- H04L 1/1614: {using bitmaps}
- H04L 1/1671: {the supervisory signal being transmitted together with control information}
- H04L 1/1685: {the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal}
- H04L 1/1819: {with retransmission of additional or different redundancy}
- H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes
- H04L 1/1825: Adaptation of specific ARQ protocol parameters according to transmission conditions
- H04L 1/1845: {Combining techniques, e.g. code combining}
- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04L 1/188: {Time-out mechanisms}
- H04L 2001/0097: {Relays}
- H04W 16/28: using beam steering
- H04W 28/0221: {power availability or consumption}
- H04W 52/0209: {in terminal devices}
- Y02D 30/00: Reducing energy consumption in communication networks
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

In an aspect, a wireless device with a plurality of transmitter chains that can be selectively used to transmit a beam-formed signal determines a targeted receive power for the beam-formed signal, with respect to a target receiving device. The wireless device selects a number of the plurality of transmitter chains for forming the beam-formed signal, based on the targeted receive power and based on an estimated power consumption for each of the plurality of transmitter chains. The selection is performed so as to minimize a total power consumption, given the estimated power consumptions. The wireless device transmits a beam-formed signal, using the selected number of the plurality of transmitter chains.

## Claims

### Claim 1

A method, in a base station having a plurality of transmitter chains that can be selectively used to transmit a beam-formed signal, the method comprising:
determining a targeted receive power for the beam-formed signal, with respect to a target user equipment (UE);
selecting a number of the plurality of transmitter chains for forming the beam-formed signal, based on the targeted receive power and based on an estimated power consumption for each of the plurality of transmitter chains, wherein said selecting is performed so as to minimize a total power consumption, given the estimated power consumptions; and
transmitting a beam-formed signal, using the selected number of the plurality of transmitter chains.

### Claim 2 (depends on 1)

The method of claim 1, wherein determining the targeted receive power is based on an estimated path loss between the base station and the targeted UE.

### Claim 3 (depends on 2)

The method of claim 2, wherein the estimated path loss is obtained from signaling received by the base station.

### Claim 4 (depends on 2)

The method of claim 2, wherein determining the targeted receive power is further based on an estimated interference level.

### Claim 5 (depends on 2)

The method of claim 2, wherein determining the targeted receive power is further based on a targeted data rate for a transmission to the target UE.

### Claim 6 (depends on 1)

The method of claim 1, wherein selecting the number of the plurality of transmitter chains comprises:
determining, for at least one set of transmitter chains, a desired output power for each transmitter chain in the set, based on the targeted receive power and based on an estimated contribution of each transmitter chain to the targeted receive power; and
determining the estimated power consumption for each transmitter chain in the set, based on the desired output power for the respective transmitter chain.

### Claim 7 (depends on 6)

The method of claim 6, further comprising determining the estimated contribution of each transmitter chain to the targeted receive power based on an estimated quality of channel information possessed by the base station.

### Claim 8 (depends on 1)

The method of claim 1, wherein said determining, selecting, and transmitting are repeated one or more times.

### Claim 9 (depends on 8)

The method of claim 8, wherein said determining, selecting, and transmitting are repeated periodically.

### Claim 10 (depends on 8)

The method of claim 8, wherein an interval for repeating said determining, selecting, and transmitting is based on an estimated speed for the base station.

### Claim 11 (depends on 8)

The method of claim 8, wherein an interval for repeating said determining, selecting, and transmitting is based on a configured power mode for the base station.

### Claim 12

A base station, comprising:
a plurality of transmitter chains that can be selectively used to transmit a beam-formed signal; and
processing circuitry operatively associated with the plurality of transmitter chains and configured to:
determine a targeted receive power for the beam-formed signal, with respect to a target user equipment (UE);
select a number of the plurality of transmitter chains for forming the beam-formed signal, based on the targeted receive power and based on an estimated power consumption for each of the plurality of transmitter chains, wherein said selecting is performed so as to minimize a total power consumption, given the estimated power consumptions; and
transmit a beam-formed signal, using the selected number of the plurality of transmitter chains.

### Claim 13 (depends on 12)

The base station of claim 12, wherein the processing circuitry is configured to determine the targeted receive power based on an estimated path loss between the base station and the targeted UE.

### Claim 14 (depends on 13)

The base station of claim 13, wherein the estimated path loss is obtained from signaling received by the base station.

### Claim 15 (depends on 13)

The base station of claim 13, wherein the processing circuitry is configured to determine the targeted receive power further based on an estimated interference level.

### Claim 16 (depends on 13)

The base station of claim 13, wherein the processing circuitry is configured to determine the targeted receive power further based on a targeted data rate for a transmission to the target UE.

### Claim 17 (depends on 12)

The base station of claim 12, wherein the processing circuitry is configured to select the number of the plurality of transmitter chains by:
determining, for at least one set of transmitter chains, a desired output power for each transmitter chain in the set, based on the targeted receive power and based on an estimated contribution of each transmitter chain to the targeted receive power; and
determining the estimated power consumption for each transmitter chain in the set, based on the desired output power for the respective transmitter chain.

### Claim 18 (depends on 17)

The base station of claim 17, wherein the processing circuitry is configured to determine the estimated contribution of each transmitter chain to the targeted receive power based on an estimated quality of channel information possessed by the base station.

### Claim 19 (depends on 12)

The base station of claim 12, wherein the processing circuitry is configured to repeat said determine, select, and transmit operations one or more times.

### Claim 20 (depends on 19)

The base station of claim 19, wherein the processing circuitry is configured to repeat said determine, select, and transmit operations periodically.

### Claim 21 (depends on 19)

The base station of claim 19, wherein the processing circuitry is configured to base an interval for repeating said determine, select, and transmit operations on an estimated speed for the base station.

### Claim 22 (depends on 19)

The base station of claim 19, wherein the processing circuitry is configured to base an interval for repeating said determine, select, and transmit operations on a configured power mode for the base station.

### Claim 23

A non-transitory computer readable storage medium storing a computer program comprising program instructions that, when executed on at least one processing circuit of base station having a plurality of transmitter chains that can be selectively used to transmit a beam-formed signal, configures the base station to:
determine a targeted receive power for the beam-formed signal, with respect to a target user equipment (UE);
select a number of the plurality of transmitter chains for forming the beam-formed signal, based on the targeted receive power and based on an estimated power consumption for each of the plurality of transmitter chains, wherein said selecting is performed so as to minimize a total power consumption, given the estimated power consumptions; and
transmit a beam-formed signal, using the selected number of the plurality of transmitter chains.