# US 10,321,484 B2 · Multi-band operation for wireless LAN systems

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- Number: US 10,321,484 B2
- Document ID: US10321484B2
- Status: Granted
- Kind: B2
- Application number: 14/777,151
- Filed: 2014-03-13
- Published: 2016-02-11
- Granted: 2019-06-11
- Earliest claimed: 2013-03-15
- Assignees: InterDigital Patent Holdings, Inc.
- Applicants: InterDigital Patent Holdings, Inc.
- Inventors: Hanqing Lou; Monisha Ghosh; Xiaofei Wang; Robert L. Olesen
- Web page: https://patentgrep.com/patent/US10321484B2

## CPC

- H04W 74/0816: with collision avoidance
- H04B 7/0617: {for beam forming}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W 88/08: Access point devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

Systems, methods, and instrumentalities are provided to implement transmission scheduling. A multiband device may send a request via a first frequency band. The request may include a multiband Request to Send (MRTS) transmission. The request may be associated with a second frequency band and/or a beamforming training schedule. The first frequency band may be associated with a quasi-omni transmission and the second frequency band may be associated with a directional transmission. The first frequency band may be a 5 GHz band and the second frequency band may be a 60 GHz band. The multiband device may receive a multiband Clear to Send (MCTS) transmission via the first frequency band confirming the request. The multiband device may be configured to send a beamforming signal in accordance with the request, for example, via the second frequency band. The beamforming signal may be sent in accordance with a beamforming training schedule.

## Claims

### Claim 1

A multiband device, comprising:
a memory; and
a processor configured to:
send a request via a first frequency band, wherein the request is associated with scheduling a transmission on a second frequency band, and wherein the request indicates an allocation start time and a duration of the transmission on the second frequency band, and wherein the request comprises a sector sweep (SSW) field;
receive a frame via the first frequency band, wherein the received frame indicates an acceptance of the request, and wherein the received frame comprises a SSW feedback field; and
send the transmission on the second frequency band in accordance with the allocation start time and the duration, wherein the transmission comprises a beamforming training transmission.

### Claim 2 (depends on 1)

The multiband device of claim 1, wherein the request comprises a request to send frame, and the received frame comprises a clear to send frame.

### Claim 3 (depends on 1)

The multiband device of claim 1, wherein the processor is further configured to:
receive a beamforming training schedule.

### Claim 4 (depends on 1)

The multiband device of claim 1, wherein the beamforming transmission comprises a plurality of beamforming training signals.

### Claim 5 (depends on 1)

The multiband device of claim 1, wherein the frame comprises a field that indicates whether the request is accepted.

### Claim 6 (depends on 1)

The multiband device of claim 1, wherein the frame does not comprise a media access control (MAC) body.

### Claim 7 (depends on 1)

The multiband device of claim 1, wherein the first frequency band is associated with a quasi-omni transmission and the second frequency band is associated with a directional transmission.

### Claim 8 (depends on 1)

The multiband device of claim 1, wherein the first frequency band is a 5 GHz band and the second frequency band is a 60 GHz band.

### Claim 9

A method comprising:
sending a request via a first frequency band, wherein the request is associated with scheduling a transmission on a second frequency band, and wherein the request indicates an allocation start time and a duration of the transmission on the second frequency band, and wherein the request comprises a sector sweep (SSW) field;
receiving a frame via the first frequency band, wherein the received frame indicates an acceptance of the request, and wherein the received frame comprises a SSW feedback field; and
sending the transmission on the second frequency band in accordance with the allocation start time and the duration, wherein the transmission comprises a beamforming training transmission.

### Claim 10 (depends on 9)

The method of claim 9, wherein the request comprises a request to send frame, and the received frame comprises a clear to send frame.

### Claim 11 (depends on 9)

The method of claim 9, further comprising:
receiving a beamforming training schedule.

### Claim 12 (depends on 9)

The method of claim 9, wherein the beamforming transmission comprises a plurality of beamforming training signals.

### Claim 13 (depends on 9)

The method of claim 9, wherein the frame comprises a field that indicates whether the request is accepted.

### Claim 14 (depends on 9)

The method of claim 9, wherein the frame does not comprise a media access control (MAC) body.

### Claim 15 (depends on 9)

The method of claim 9, wherein the first frequency band is associated with a quasi-omni transmission and the second frequency band is associated with a directional transmission.

### Claim 16 (depends on 9)

The method of claim 9, wherein the first frequency band is a 5 GHz band and the second frequency band is a 60 GHz band.