# US 9,882,730 B2 · Channel-occupancy efficient, low power wireless networking

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- Number: US 9,882,730 B2
- Document ID: US9882730B2
- Status: Granted
- Kind: B2
- Application number: 14/813,211
- Filed: 2015-07-30
- Published: 2015-11-19
- Granted: 2018-01-30
- Earliest claimed: 2006-07-11
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Long Wang
- Web page: https://patentgrep.com/patent/US9882730B2

## CPC

- H04L 12/12: Arrangements for remote connection or disconnection of substations or of equipment thereof
- H04W 52/0203: {in the radio access network or backbone network of wireless communication networks}
- H04W 52/0219: {where the power saving management affects multiple terminals}
- H04W 74/06: using polling
- H04W 52/0235: {where the received signal is a power saving command}
- H04W 56/001: {Synchronization between nodes}
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04W 84/20: Leader-follower arrangements
- Y02B 70/30: Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- 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

An apparatus and method are provided for saving power an independent basic service set (IBSS) comprising a master and a plurality of clients. According to the apparatus and method, a client of the IBSS receives a keyset packet from the master during an interval, the keyset packet including an aggregate of current client data, wherein the interval is a member of the group consisting of: a beacon interval and a coordination transmission interval. The client sends a key packet to the master during the interval, the key packet including new data from the client. The client contends for a shared wireless medium to send the key packet. The client enters an idle state for a duration of the interval after sending the key packet.

## Claims

### Claim 1

A method of saving power in a client of an independent basic service set (IBSS) comprising a master and a plurality of clients that includes the client, the method comprising:
receiving a keyset packet at the client from the master during an interval, the keyset packet including an aggregate of current client data, wherein the interval is a member of the group consisting of: a beacon interval and a coordination transmission interval;
sending a key packet from the client to the master during the interval, the key packet including new data from the client, the new data updating the current client data received in the keyset packet, wherein the client contends for a shared wireless medium to send the key packet; and
entering an idle state for a duration of the interval after sending the key packet.

### Claim 2 (depends on 1)

The method of claim 1, wherein the keyset packet is a unicast packet.

### Claim 3 (depends on 1)

The method of claim 1, wherein sending the key packet comprises bypassing sending a corresponding announcement traffic indication message (ATIM).

### Claim 4 (depends on 1)

The method of claim 1, wherein contending for the shared wireless medium comprises one from the group consisting of:
contending with a second client prior to a transmission of a key packet by the second client; and
contending with the master prior to a transmission of the keyset packet by the master to the second client.

### Claim 5 (depends on 1)

The method of claim 1, wherein the aggregate of current client data comprises all current client data from the plurality of clients.

### Claim 6 (depends on 1)

The method of claim 1, further comprising:
receiving a beacon from the master prior to the keyset packet.

### Claim 7

A communications device, comprising:
a processor; and
a memory communicatively coupled to the processor, the memory comprising computer-readable code that, when executed by the processor, causes a device to:
receive a keyset packet at a client of a plurality of clients from a master during an interval, the keyset packet including an aggregate of current client data, wherein the interval is a member of the group consisting of: a beacon interval and a coordination transmission interval;
send a key packet from the client to the master during the interval, the key packet including new data from the client, the new data updating the current client data received in the keyset packet, wherein the client contends for a shared wireless medium to send the key packet; and
enter an idle state for a duration of the interval after sending the key packet.

### Claim 8 (depends on 7)

The communications device of claim 7, wherein the keyset packet is a unicast packet.

### Claim 9 (depends on 7)

The communications device of claim 7, wherein the computer-readable code, when executed by the processor, further causes the device to bypass sending a corresponding announcement traffic indication message (ATIM) indicating when to send the key packet.

### Claim 10 (depends on 7)

The communications device of claim 7, wherein contending for the shared wireless medium comprises one from the group consisting of:
contending with a second client prior to a transmission of a key packet by the second client; and
contending with the master prior to a transmission of the keyset packet by the master to the second client.

### Claim 11 (depends on 7)

The communications device of claim 7, wherein the aggregate of current client data comprises all current client data from the plurality of clients.

### Claim 12 (depends on 7)

The communications device of claim 7, wherein the computer-readable code, when executed by the processor, further causes the device to:
receive a beacon from the master prior to the keyset packet.

### Claim 13

A non-transitory computer-readable medium storing computer-executable code for wireless communication by a device that, when executed by one or more processors of the device, causes the device to:
receive a keyset packet at a client of a plurality of clients from a master during an interval, the keyset packet including an aggregate of current client data, wherein the interval is a member of the group consisting of: a beacon interval and a coordination transmission interval;
send a key packet from the client to the master during the interval, the key packet including new data from the client, the new data updating the current client data received in the keyset packet, wherein the client contends for a shared wireless medium to send the key packet; and
enter an idle state for a duration of the interval after sending the key packet.

### Claim 14 (depends on 13)

The computer-readable medium of claim 13, wherein the keyset packet is a unicast packet.

### Claim 15 (depends on 13)

The computer-readable medium of claim 13, further comprising computer-executable code that, when executed by one or more processors of the device, causes the device to bypass sending a corresponding announcement traffic indication message (ATIM) indicating when to send the key packet.

### Claim 16 (depends on 13)

The computer-readable medium of claim 13, wherein contending for the shared wireless medium comprises one from the group consisting of:
contending with a second client prior to a transmission of a key packet by the second client; and
contending with the master prior to a transmission of the keyset packet by the master to the second client.

### Claim 17 (depends on 13)

The computer-readable medium of claim 13, wherein the aggregate of current client data comprises all current client data from the plurality of clients.