# US 11,910,325 B2 · Low power scheduling

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- Number: US 11,910,325 B2
- Document ID: US11910325B2
- Status: Granted
- Kind: B2
- Application number: 16/510,763
- Filed: 2019-07-12
- Published: 2019-11-07
- Granted: 2024-02-20
- Earliest claimed: 2014-10-31
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Peter Pui Lok Ang; Tingfang Ji; Jing Jiang; Krishna Kiran Mukkavilli; Joseph Binamira Soriaga; John Edward Smee; Naga Bhushan
- Web page: https://patentgrep.com/patent/US11910325B2

## CPC

- H04W 52/0258: {controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day}
- H04B 7/0413: MIMO systems
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- 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 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/0473: {the resource being transmission power}
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- 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

The disclosure relates in some aspects to an energy-aware architecture that supports a low power scheduling mode. For example, a media access control (MAC) architecture for a base station (e.g., an enhanced Node B) and associated access terminals (e.g., UEs) can take the power needs of the access terminals into account when scheduling the access terminals. In some aspects, an access terminal may support a particular frame structure for a low power mode. Accordingly, scheduling of the access terminal may include use of the particular frame structure during low power mode.

## Claims

### Claim 1

A method of wireless communication by a user equipment (UE), comprising:
sending an indication to a base station that the UE supports, for different ones of a plurality of power modes supported by the UE, an enhanced microsleep mode, wherein the enhanced microsleep mode enables the UE to enter a sleep mode for one or more transmission time intervals (TTIs) during which an absence of scheduling for the UE is guaranteed to the UE;
receiving, from the base station, an indication of the absence of scheduling for the UE for a preselected duration, wherein the indication of the absence of scheduling comprises the preselected duration; and
ceasing monitoring, immediately after the indication of the absence of scheduling, for control information from the base station for at least the preselected duration.

### Claim 2 (depends on 1)

The method of claim 1, wherein the preselected duration corresponds to a duration of a preselected number of slots within a subframe.

### Claim 3 (depends on 1)

The method of claim 1, wherein the scheduling comprises semi-persistent scheduling.

### Claim 4 (depends on 1)

The method of claim 1, wherein the ceasing monitoring for control information from the base station for at least the preselected duration comprises ceasing monitoring a control channel.

### Claim 5 (depends on 1)

The method of claim 1:
wherein the plurality of power modes supported by the UE comprises a low power mode and a normal power mode where the low power mode is associated with lower power consumption than the normal power mode; and
wherein the ceasing monitoring for control information from the base station for at least the preselected duration comprises operating the UE in the low power mode.

### Claim 6 (depends on 5)

The method of claim 5, further comprising:
operating the UE in the normal power mode after the preselected duration.

### Claim 7 (depends on 1)

The method of claim 1, further comprising:
sending an indication to the base station of a frame structure supported by the UE for a first power mode of the plurality of power modes supported by the UE.

### Claim 8 (depends on 7)

The method of claim 7, wherein:
the UE supports another frame structure for a second power mode of the plurality of power modes; and
the frame structure supported by the UE for the first power mode specifies a first transmission time interval, TTI, that is shorter than a second TTI specified by the other frame structure.

### Claim 9 (depends on 1)

The method of claim 1, further comprising sending an indication to the base station that the UE further supports selection of one of:
modulation and coding scheme, MCS, for different ones of the plurality of power modes supported by the UE;
multiple input multiple output, MIMO, transmission mode for different ones of the plurality of power modes; and
carrier aggregation level for different ones of the plurality of power modes.

### Claim 10 (depends on 1)

The method of claim 1, further comprising sending an indication to the base station that the UE further supports, for different ones of the plurality of power modes supported by the UE, at least one of:
different convolutional coding schemes; or different antenna selections.

### Claim 11 (depends on 1)

The method of claim 1, further comprising:
sending, to the base station prior to receiving the indication of the absence of scheduling for the UE for the preselected duration, a minimum sleep duration of the UE; and
wherein the preselected duration is equal to or greater than the minimum sleep duration.

### Claim 12 (depends on 1)

The method of claim 1:
wherein the plurality of power modes supported by the UE comprises a low power mode and a normal power mode where the low power mode is associated with lower power consumption than the normal power mode; and
wherein the ceasing monitoring for control information from the base station for at least the preselected duration comprises operating the UE in the low power mode;
the method further comprising:
receiving, from the base station and after receiving the indication of the absence of scheduling for the UE for the preselected duration, a request to transition the UE to the normal power mode; and
sending an indication to the base station that the UE declined the request to transition the UE to the normal power mode.

### Claim 13

A user equipment (UE) for wireless communication, comprising:
a memory device;
one or more processors coupled to the memory device, the one or more processors configured to:
send an indication to a base station that the UE supports, for different ones of a plurality of power modes supported by the UE, an enhanced microsleep mode, wherein the enhanced microsleep mode enables the UE to enter a sleep mode for one or more transmission time intervals (TTIs) during which an absence of scheduling for the UE is guaranteed to the UE;
receive, from the base station, an indication of the absence of scheduling for the UE for a preselected duration, wherein the indication of the absence of scheduling comprises the preselected duration; and
cease monitoring, immediately after the indication of the absence of scheduling, for control information from the base station for at least the preselected duration.

### Claim 14 (depends on 13)

The UE of claim 13, wherein the preselected duration corresponds to a duration of a preselected number of slots within a subframe.

### Claim 15 (depends on 13)

The UE of claim 13, wherein the scheduling comprises semi-persistent scheduling.

### Claim 16 (depends on 13)

The UE of claim 13, wherein the one or more processors configured to cease monitoring for control information from the base station for at least the preselected duration are further configured to cease monitoring a control channel.

### Claim 17 (depends on 13)

The UE of claim 13:
wherein the plurality of power modes supported by the UE comprises a low power mode and a normal power mode where the low power mode is associated with lower power consumption than the normal power mode; and
wherein the one or more processors configured to cease monitoring for control information from the base station for at least the preselected duration are further configured to operate the UE in the low power mode.

### Claim 18 (depends on 17)

The UE of claim 17, wherein the one or more processors are further configured to operate the UE in the normal power mode after the preselected duration.

### Claim 19 (depends on 13)

The UE of claim 13, wherein the one or more processors are further configured to:
send an indication to the base station of a frame structure supported by the UE for a first power mode of the plurality of power modes supported by the UE.

### Claim 20 (depends on 19)

The UE of claim 19, wherein:
the UE supports another frame structure for a second power mode of the plurality of power modes; and
the frame structure supported by the UE for the first power mode specifies a first transmission time interval, TTI, that is shorter than a second TTI specified by the other frame structure.

### Claim 21 (depends on 13)

The UE of claim 13, wherein the one or more processors are further configured to send an indication to the base station that the UE further supports selection of one of:
modulation and coding scheme, MCS, for different ones of the plurality of power modes supported by the UE;
multiple input multiple output, MIMO, transmission mode for different ones of the plurality of power modes; and
carrier aggregation level for different ones of the plurality of power modes.

### Claim 22 (depends on 13)

The UE of claim 13, wherein the one or more processors are further configured to send an indication to the base station that the UE further supports, for different ones of the plurality of power modes supported by the UE, at least one of:
different convolutional coding schemes; or different antenna selections.

### Claim 23 (depends on 13)

The UE of claim 13, wherein the processing circuit is one or more processors are further configured to:
send, to the base station prior to receiving the indication of the absence of scheduling for the UE for the preselected duration, a minimum sleep duration of the UE; and
wherein the preselected duration is equal to or greater than the minimum sleep duration.

### Claim 24 (depends on 13)

The UE of claim 13:
wherein the plurality of power modes supported by the UE comprises a low power mode and a normal power mode where the low power mode is associated with lower power consumption than the normal power mode; and
wherein the one or more processors configured to cease monitoring for control information from the base station for at least the preselected duration are further configured to operate the UE in the low power mode;
wherein the one or more processors are further configured to:
receive, from the base station and after receiving the indication of the absence of scheduling for the UE for the preselected duration, a request to transition the UE to the normal power mode; and
send an indication to the base station that the UE declined the request to transition the UE to the normal power mode.

### Claim 25

A method for wireless communication at a base station, comprising:
receiving an indication from a user equipment (UE) that the UE supports, for different ones of a plurality of power modes supported by the UE, an enhanced microsleep mode, wherein the enhanced microsleep mode enables the UE to enter a sleep mode for one or more transmission time intervals (TTIs) during which an absence of scheduling for the UE is guaranteed to the UE;
sending an indication to the UE of the absence of scheduling for the UE for a preselected duration, wherein the indication of the absence of scheduling comprises the preselected duration; and
ceasing, immediately after sending the scheduling indication, sending control information to the UE for the preselected duration.

### Claim 26 (depends on 25)

The method of claim 25, wherein the preselected duration corresponds to a preselected number of slots within a subframe.

### Claim 27 (depends on 25)

The method of claim 25, wherein the scheduling comprises semi-persistent scheduling.

### Claim 28 (depends on 25)

The method of claim 25, wherein the ceasing, immediately after sending the scheduling indication, sending control information to the UE for the preselected duration comprises ceasing sending control channel information to the UE.

### Claim 29 (depends on 25)

The method of claim 25, further comprising receiving an indication of a frame structure supported by the UE for a first power mode of the plurality of power modes supported by the UE.

### Claim 30 (depends on 25)

The method of claim 25, further comprising:
receiving, from the UE prior to sending the indication to the UE of the absence of scheduling for the UE for the preselected duration, a minimum sleep duration of the UE; and
determining the preselected duration such that the preselected duration is equal to or greater than the minimum sleep duration.

### Claim 31 (depends on 25)

The method of claim 25, further comprising:
sending, to the UE after sending the indication to the UE of the absence of scheduling for the UE for the preselected duration, a request to transition the UE from a low power mode to a normal power mode, wherein the low power mode is associated with lower power consumption than the normal power mode; and
receiving an indication that the UE declined the request to transition the UE from the low power mode to the normal power mode.

### Claim 32

A base station for wireless communication, comprising:
a memory device;
one or more processors coupled to the memory device, the one or more processors configured to:
receive an indication from a user equipment (UE) that the UE supports, for different ones of a plurality of power modes supported by the UE, an enhanced microsleep mode wherein the enhanced microsleep mode enables the UE to enter a sleep mode for one or more transmission time intervals (TTIs) during which an absence of scheduling for the UE is guaranteed to the UE;
send an indication to the UE of the absence of scheduling for the UE for a preselected duration, wherein the indication of the absence of scheduling comprises the preselected duration; and
cease, immediately after sending the scheduling indication, sending control information to the UE for the preselected duration.

### Claim 33 (depends on 32)

The base station of claim 32, wherein the preselected duration corresponds to a duration of a preselected number of slots within a subframe.

### Claim 34 (depends on 32)

The base station of claim 32, wherein the scheduling comprises semi-persistent scheduling.

### Claim 35 (depends on 32)

The base station of claim 32, wherein the one or more processors configured to cease, immediately after sending the scheduling indication, sending control information to the UE for the preselected duration are configured to cease sending control channel information to the UE.

### Claim 36 (depends on 32)

The base station of claim 32, wherein the one or more processors are further configured to receive an indication of a frame structure supported by the UE for a first power mode of the plurality of power modes supported by the UE.

### Claim 37 (depends on 32)

The base station of claim 32, wherein the one or more processors are further configured to:
receive, from the UE prior to sending the indication to the UE of the absence of scheduling for the UE for the preselected duration, a minimum sleep duration of the UE; and
determine the preselected duration such that the preselected duration is equal to or greater than the minimum sleep duration.

### Claim 38 (depends on 32)

The base station of claim 32, wherein the one or more processors are further configured to:
send, to the UE after sending the indication to the UE of the absence of scheduling for the UE for the preselected duration, a request to transition the UE from a low power mode to a normal power mode, wherein the low power mode is associated with lower power consumption than the normal power mode; and
receive an indication that the UE declined the request to transition the UE from the low power mode to the normal power mode.