# US 2019/0174508 A1 · Wifi channel selection and subchannel selective transmissions

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- Number: US 2019/0174508 A1
- Document ID: US20190174508A1
- Status: Published application
- Kind: A1
- Application number: 16/272,161
- Filed: 2019-02-11
- Published: 2019-06-06
- Earliest claimed: 2013-06-06
- Assignees: InterDigital Patent Holdings, Inc.
- Applicants: InterDigital Patent Holdings, Inc.
- Inventors: Xiaofei Wang; Guodong Zhang
- Web page: https://patentgrep.com/patent/US20190174508A1

## CPC

- H04W 72/542: using measured or perceived quality
- H04W 74/0816: with collision avoidance
- H04W 84/12: WLAN [Wireless Local Area Networks]
- 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

A station (STA) may include an antenna and a processor operatively coupled to the antenna. The processor and the antenna may be configured to send, to an access point (AP), a first message including an indication of one or more secondary channels in an operating band. The operating band may include a primary channel and the one or more secondary channels. The processor and the antenna may be further configured to receive, from the AP, a second message including an indication of a channel of the one or more secondary channels to use in a scheduled transmission period.

## Claims

### Claim 1

A station (STA) comprising:
an antenna; and
a processor operatively coupled to the antenna;
the processor and the antenna configured to send, to an access point (AP), a first message comprising an indication of one or more secondary channels in an operating band, wherein the operating band comprises a primary channel and the one or more secondary channels; and
the processor and the antenna further configured to receive, from the AP, a second message comprising an indication of a channel of the one or more secondary channels to use in a scheduled transmission period.

### Claim 2 (depends on 1)

The STA of claim 1, wherein the processor and the antenna are further configured to monitor the channel during the scheduled transmission period.

### Claim 3 (depends on 1)

The STA of claim 1, wherein the first message comprises a first bitmap and the second message comprises a second bitmap.

### Claim 4 (depends on 1)

The STA of claim 1, wherein the STA is initially configured to operate the primary channel.

### Claim 5 (depends on 1)

The STA of claim 1, wherein the scheduled transmission period comprises a target wake time (TW) scheduling period.

### Claim 6 (depends on 1)

The STA of claim 1, wherein the second message comprises a beacon frame.

### Claim 7 (depends on 1)

The STA of claim 1, wherein the scheduled transmission period comprises a subchannel selective transmission (SST) period.

### Claim 8

A method for use in a station (STA), the method comprising:
sending, to an access point (AP), a first message comprising an indication of one or more secondary channels in an operating band, wherein the operating band comprises a primary channel and the one or more secondary channels; and
receiving, from the AP, a second message comprising an indication of a channel of the one or more secondary channels to use in a scheduled transmission period.

### Claim 9 (depends on 8)

The method of claim 8, further comprising:
monitoring the channel during the scheduled transmission period.

### Claim 9 (depends on 8)

The method of claim 8, wherein the first message comprises a first bitmap and the second message comprises a second bitmap.

### Claim 10 (depends on 8)

The method of claim 8, wherein the second message comprises an information element (IE).

### Claim 11 (depends on 8)

The method of claim 8, wherein the STA is initially configured to operate on the primary channel.

### Claim 12 (depends on 8)

The method of claim 8, wherein the scheduled transmission period comprises a target wake time (TW) scheduling period.

### Claim 13 (depends on 8)

The method of claim 8, wherein the second message comprises a beacon frame.

### Claim 14 (depends on 8)

The method of claim 8, wherein the scheduled period comprises a subchannel selective transmission (SST) period.

### Claim 15

An access point (AP) comprising:
an antenna; and
a processor operatively coupled to the antenna;
the processor and the antenna configured to receive, from a station (STA), a first message comprising an indication of one or more secondary channels in an operating band, wherein the operating band comprises a primary channel and the one or more secondary channels; and
the processor and the antenna further configured to send, to the STA, a second message comprising an indication of a channel of the one or more secondary channels to use in a scheduled transmission period.

### Claim 16 (depends on 15)

The AP of claim 15, wherein the processor and the antenna are further configured to allocate one or more resources to the STA on the channel during the scheduled transmission period.

### Claim 17 (depends on 15)

The AP of claim 15, wherein the first message comprises a first bitmap and the second message comprises a second bitmap.

### Claim 18 (depends on 15)

The AP of claim 15, wherein the STA is initially configured to operate on the primary channel.

### Claim 19 (depends on 15)

The AP of claim 15, wherein the second message comprises a beacon frame.

### Claim 20 (depends on 15)

The AP of claim 15, wherein the scheduled period comprises a subchannel selective transmission (SST) period.