# US 12,225,448 B2 · Information transmission method, network device, and user equipment

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- Number: US 12,225,448 B2
- Document ID: US12225448B2
- Status: Granted
- Kind: B2
- Application number: 18/460,356
- Filed: 2023-09-01
- Published: 2024-02-15
- Granted: 2025-02-11
- Earliest claimed: 2016-06-03
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Pei Zhou; Yan Long; Xiao Han; Yingpei Lin
- Web page: https://patentgrep.com/patent/US12225448B2

## CPC

- H04W 48/10: using broadcasted information
- H04B 7/0617: {for beam forming}
- H04L 5/0037: {Inter-user or inter-terminal allocation}
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04W 16/28: using beam steering
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 48/12: using downlink control channel
- H04W 84/12: WLAN [Wireless Local Area 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)

## Abstract

Embodiments of this application provide an information transmission method, a network device, and a user equipment. The method provided in this application includes: sending, by a network device, a broadcast frame that includes first duration information and second duration information that are of A-BFT (Association Beamforming Training); receiving a frame sent by a first user equipment in a timeslot randomly selected from a first time range; and receiving a frame sent by a second user equipment in a timeslot randomly selected from a second time range. According to the embodiments of this application, beamforming training efficiency can be improved.

## Claims

### Claim 1

A network apparatus, comprising:
a processor; and
a storage medium storing instructions that, when executed by the processor, cause the network apparatus to:
send a broadcast frame, wherein the broadcast frame comprises first duration information and second duration information, wherein the first duration information is configured to indicate a first time range of association beamforming training (A-BFT) for a first user apparatus corresponding to the 802.11ad standard, wherein the second duration information is configured to indicate a second time range of A-BFT for a second user apparatus corresponding to the 802.11ay standard, and wherein a duration of the second time range is equal to or greater than a duration of the first time range;
receive a first-type frame from the first user apparatus in a first timeslot randomly selected from the first time range; and
receive a second-type frame from the second user apparatus in a second timeslot randomly selected from the second time range, wherein a transmission duration of the first-type frame is equal to or greater than a transmission duration of the second-type frame;
wherein the first duration information is located in an A-BFT length field of a beacon interval (BI) control field in the broadcast frame, and the second duration information is located in at least one bit in the BI control field other than the A-BFT length field.

### Claim 2 (depends on 1)

The network apparatus according to claim 1, wherein the second-type frame is a short sector sweep (SSSW) frame.

### Claim 3 (depends on 1)

The network apparatus according to claim 1, wherein the broadcast frame further comprises frame quantity indication information, wherein the frame quantity indication information is located in a frame of sector sweep (FSS) field of a beacon interval (BI) control field in the broadcast frame.

### Claim 4 (depends on 3)

The network apparatus according to claim 3, wherein the frame quantity indication information is configured to indicate a frame quantity of the second-type frame.

### Claim 5 (depends on 3)

The network apparatus according to claim 3, wherein the frame quantity indication information is further configured to indicate a frame quantity of the first-type frame.

### Claim 6

A second user equipment, comprising:
a processor; and
a storage medium storing instructions that, when executed by the processor, cause the second user equipment to:
receive a broadcast frame from a network apparatus, wherein the broadcast frame comprises first duration information and second duration information, wherein the first duration information is configured to indicate a first time range of association beamforming training (A-BFT) for a first user equipment corresponding to the 802.11ad standard, wherein the second duration information is configured to indicate a second time range of A-BFT for the second user equipment corresponding to the 802.11ay standard, and wherein a duration of the second time range is equal to or greater than a duration of the first time range;
determine the second time range and randomly select a second timeslot from the second time range; and
send a second-type frame to the network apparatus in the second timeslot, wherein a transmission duration of a first-type frame transmitted in a first timeslot randomly selected from the first time range is equal to or greater than a transmission duration of the second-type frame;
wherein the first duration information is located in an A-BFT length field of a beacon interval (BI) control field in the broadcast frame, and the second duration information is located in at least one bit in the BI control field other than the A-BFT length field.

### Claim 7 (depends on 6)

The second user equipment according to claim 6, wherein the second-type frame is a short sector sweep (SSSW) frame.

### Claim 8 (depends on 6)

The second user equipment according to claim 6, wherein the broadcast frame further comprises frame quantity indication information, wherein the frame quantity indication information is located in a frame of sector sweep (FSS) field of a beacon interval (BI) control field in the broadcast frame.

### Claim 9 (depends on 8)

The second user equipment according to claim 8, wherein the frame quantity indication information is configured to indicate a frame quantity of the second-type frame.

### Claim 10

A non-transitory computer-readable storage medium storing instructions that, when executed, cause a network apparatus to:
send a broadcast frame, wherein the broadcast frame comprises first duration information and second duration information, wherein the first duration information is configured to indicate a first time range of association beamforming training (A-BFT) for a first user apparatus corresponding to the 802.11ad standard, wherein the second duration information is configured to indicate a second time range of A-BFT for a second user apparatus corresponding to the 802.11ay standard, and wherein a duration of the second time range is equal to or greater than a duration of the first time range;
receive a first-type frame from the first user apparatus in a first timeslot randomly selected from the first time range; and
receive a second-type frame from the second user apparatus in a second timeslot randomly selected from the second time range, wherein a transmission duration of the first-type frame is equal to or greater than a transmission duration of the second-type frame;
wherein the first duration information is located in an A-BFT length field of a beacon interval (BI) control field in the broadcast frame, and the second duration information is located in at least one bit in the BI control field other than the A-BFT length field.

### Claim 11 (depends on 10)

The non-transitory computer-readable storage medium according to claim 10, wherein the second-type frame is a short sector sweep (SSSW) frame.

### Claim 12 (depends on 10)

The non-transitory computer-readable storage medium according to claim 10, wherein the broadcast frame further comprises frame quantity indication information, wherein the frame quantity indication information is located in a frame of sector sweep (FSS) field of a beacon interval (BI) control field in the broadcast frame.

### Claim 13 (depends on 12)

The non-transitory computer-readable storage medium according to claim 12, wherein the frame quantity indication information is configured to indicate a frame quantity of the second-type frame.

### Claim 14 (depends on 12)

The non-transitory computer-readable storage medium according to claim 12, wherein the frame quantity indication information is further configured to indicate a frame quantity of the first-type frame.