# US 2018/0324693 A1 · User equipment battery saving in a hetnet deployment with eicic

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- Number: US 2018/0324693 A1
- Document ID: US20180324693A1
- Status: Published application
- Kind: A1
- Application number: 13/984,637
- Filed: 2011-02-11
- Published: 2018-11-08
- Earliest claimed: 2011-02-11
- Assignees: BlackBerry Limited
- Inventors: Yi Yu; Yi Song; Zhijun Cai; Mo-han Fong; Takashi Suzuki
- Web page: https://patentgrep.com/patent/US20180324693A1

## CPC

- 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 52/0261: {managing power supply demand, e.g. depending on battery level}
- H04W 72/12: Wireless traffic scheduling
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- 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)
- 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

Devices and methods are provided for reducing client node power consumption when monitoring first and second channels corresponding to first and second access nodes in a heterogeneous wireless-enabled communications environment. Enhanced Inter-Cell Interference Coordination (eICIC) operations are performed to mitigate interference between a first access node and a second access node. The client node monitors first and second channels corresponding to the first and second access nodes to detect the presence of Almost Blank Subframes (ABS) pattern data transmitted on the first channel. When detected, the client node ceases monitoring the first channel to reduce power consumption and thereby conserve battery resources.

## Claims

### Claim 1

A client node, comprising:
processing logic operable monitor a plurality of subframes on a downlink channel and to process a control signal comprising a scheduling option corresponding to transmissions on said downlink channel;
wherein said processing logic is further operable to cease monitoring predetermined subframes of said plurality of subframes based on said scheduling option.

### Claim 2 (depends on 1)

The client node of claim 1, wherein the scheduling option is signaled to the client node via a signaling message.

### Claim 3 (depends on 1)

The client node of claim 1, wherein the scheduling option is provided to the client node implicitly.

### Claim 4 (depends on 1)

The client node of claim 1, wherein the client node is further provided with Almost Blank Subframe (ABS) pattern data.

### Claim 5 (depends on 4)

The client node of claim 4, wherein the ABS pattern data comprises ABS information.

### Claim 6 (depends on 1)

The client node of claim 1, wherein said monitoring operations comprise monitoring of a Physical Downlink Control Channel (PDCCH).

### Claim 7 (depends on 1)

The client node of claim 1, wherein said scheduling option is to monitor a PDCCH during the occurrence of ABS within said ABS pattern data.

### Claim 8 (depends on 1)

The client node of claim 1, wherein said scheduling option is to monitor a PDCCH during the occurrence of non-ABS within said ABS pattern data.

### Claim 9 (depends on 1)

The client node of claim 1, wherein said scheduling option is to monitor a PDCCH during the occurrence of ABS and non-ABS within said ABS pattern data.

### Claim 10 (depends on 1)

The client node of claim 1, wherein said scheduling option is signaled via a scheduling option indicator (SOI).

### Claim 11 (depends on 10)

The client node of claim 10, wherein the SOI is communicated to the client node as a MAC Control element.

### Claim 12 (depends on 10)

The client of claim 10, wherein the SOI is communicated to the client node in a Radio Resource Control (RRC) message.

### Claim 13

A method for reducing power consumption of a client node, comprising:
using processing logic monitor a plurality of subframes on a downlink channel and to process a control signal comprising a scheduling option corresponding to transmissions on said downlink channel;
wherein said processing logic is further operable to cease monitoring predetermined subframes of said plurality of subframes based on said scheduling option.

### Claim 14 (depends on 13)

The method of claim 13, wherein the scheduling option is signaled to the client node via a signaling message.

### Claim 15 (depends on 13)

The method of claim 13, wherein the scheduling option is provided to the client node implicitly.

### Claim 16 (depends on 13)

The method of claim 13, wherein the client node is further provided with Almost Blank Subframe (ABS) pattern data.

### Claim 17 (depends on 16)

The method of claim 16, wherein the ABS pattern data comprises ABS information.

### Claim 18 (depends on 13)

The method of claim 13, wherein said monitoring operations comprise monitoring of a Physical Downlink Control Channel (PDCCH).

### Claim 19 (depends on 13)

The method of claim 13, wherein said scheduling option is to monitor a PDCCH during the occurrence of ABS within said ABS pattern data.

### Claim 20 (depends on 13)

The method of claim 13, wherein said scheduling option is to monitor a PDCCH during the occurrence of non-ABS within said ABS pattern data.

### Claim 21 (depends on 13)

The computer-implemented method of claim 13, wherein said scheduling option is to monitor a PDCCH during the occurrence of ABS and non-ABS within said ABS pattern data.

### Claim 22 (depends on 13)

The method of claim 13, wherein said scheduling option is signaled via a scheduling option indicator (SOI).

### Claim 23 (depends on 22)

The method of claim 22, wherein the SOI is communicated to the client node as a MAC Control element.

### Claim 24 (depends on 22)

The method of claim 22, wherein the SOI is communicated to the client node in a Radio Resource Control (RRC) message.