Group coordinator selection

Patent metadata

Field	Value
Publication number	US-10114605-B2
Application number	US-201514984974-A
Country	US
Kind code	B2
Filing date	Dec 30, 2015
Priority date	Dec 30, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A network device is arranged to identify a group coordinator for a group of networked playback devices. The network device may have a network interface configured to communicate with first playback device and a second playback device over a network. A processor may execute instructions to cause the processor to receive a command to cause a group of one or more playback devices to play audio content, wherein the group of one or more playback devices comprises the first playback device. In response to the command, the processor is to determine that the first playback device is battery-powered. The processor is to identify the second playback device to provide audio content data and audio content playback timing information to the group of the one or more playback devices based on the determination that the first playback device is battery-powered.

First claim

We claim:

1. A network device in a media playback system comprising at least a first playback device and a second playback device, the network device comprising:
one or more processors; and
memory storing instructions that when executed by the one or more processors cause the network device to perform functions comprising:
receiving a command over a data network to cause a group of two or more playback devices to play audio associated with audio content data, wherein the group of two or more playback devices comprises the first playback device and the second playback device;
assigning a group coordinator based on whether the first playback device is battery-powered, wherein the group coordinator provides to each of the two or more playback devices in the group the audio content data and audio content playback timing information to coordinate synchronous playback of the audio by the group,
wherein assigning a group coordinator based on whether the first playback device is battery-powered comprises:
assigning the first playback device to be the group coordinator based on a first determination that the first playback device is not battery-powered,
assigning the second playback device to be the group coordinator based on a second determination that the first playback device is battery-powered and the second playback device is not battery-powered, and
assigning the first playback device to be the group coordinator based on a third determination that (i) the first playback device is battery-powered, connected to a charging interface of the first playback device, and being charged and (ii) a battery level of the first playback device is above a threshold;
transmitting to the assigned group coordinator over the data network, a command to act as the group coordinator of the two or more playback devices such that the group coordinator provides the audio content data and audio content playback timing information to the group of the two or more playback devices,
wherein the data network comprises at least one of a wired and a wireless network.

2. The network device of claim 1 , wherein the third determination further comprises a determination that the first playback device playback has a certain processing load.

3. The network device of claim 1 , wherein the third determination further comprises a determination of an amount of time that the first playback device will be operated.

4. The network device of claim 1 , further comprising instructions for sending a message to cause the second playback device to provide audio content data and audio content playback timing information to the group of the one or more playback devices.

5. The network device of claim 1 , wherein assigning the second playback device to be the group coordinator based on the second determination that the first playback device is battery-powered and the second playback device is not battery-powered comprises determining one or more of (i) a proximity of the second playback device to a root of a media playback system network comprising the first and second playback devices; (ii) a proximity of the second playback device to the first playback device; and (iii) a proximity of the second playback device to a charging interface of the first playback device.

6. The network device of claim 5 , wherein the proximity is based on one or more of network hops for communication between the first playback device and the second playback device and an RSSI between the first playback device and the second playback device.

7. The network device of claim 1 , wherein assigning the second playback device to be the group coordinator based on the second determination that the first playback device is battery-powered and the second playback device is not battery-powered comprises determining an RSSI measurement to a root of a media playback system network.

8. The network device of claim 1 , wherein assigning the second playback device to be the group coordinator based on a second determination that the first playback device is battery-powered and the second playback device is not battery-powered comprises determining that an RSSI measurement from the first playback device to a root of a media playback system network is less than an RSSI measurement from the second playback device to the root.

9. A method comprising:
receiving a command over a data network to cause a group of two or more playback devices to play audio associated with audio content data, wherein the group of two or more playback devices comprises a first playback device and a second playback device;
assigning a group coordinator based on whether a first playback device is battery-powered, wherein the group coordinator provides to each of the two or more playback devices in the group the audio content data and audio content playback timing information to coordinate synchronous playback of the audio by the group,
wherein assigning a group coordinator based on whether the first playback device is battery-powered comprises:
assigning the first playback device to be the group coordinator based on a first determination that the first playback device is not battery-powered,
assigning the second playback device to be the group coordinator based on a second determination that the first playback device is battery-powered and the second playback device is not battery-powered, and
assigning the first playback device to be the group coordinator based on a third determination that (i) the first playback device is battery-powered, connected to a charging interface of the first playback device, and being charged and (ii) a battery level of the first playback device is above a threshold;
transmitting to the assigned group coordinator over the data network, a command to act as the group coordinator of the two or more playback devices such that the group coordinator provides the audio content data and audio content playback timing information to the group of the two or more playback devices,
wherein the data network comprises at least one of a wired and a wireless network.

10. The method of claim 9 , wherein the third determination further comprises a determination that the first playback device playback has a certain processing load.

11. The method of claim 9 , wherein the third determination further comprises a determination of an amount of time that the first playback device will be operated.

12. The method of claim 9 , wherein the first playback device is an access point for a media playback system comprising the first and second playback devices.

13. The method of claim 9 , wherein assigning the second playback device to be the group coordinator based on the second determination that the first playback device is battery-powered and the second playback device is not battery-powered comprises determining one or more of (i) a proximity of the second playback devices to a root of a media playback system network comprising the first and second playback devices; (ii) a proximity of the second playback device to the first playback device; and (iii) a proximity of the second playback device to a charging interface of the first playback device.

14. The method of claim 13 , wherein the proximity is based on one or more of network hops for communication between the first playback device and the second playback device and an RSSI between the first playback device and the second playback device.

15. The method of claim 9 , wherein assigning the second playback device to be the group coordinator based on the second determination that the first playback device is battery-powered and the second playback device is not battery-powered compris

Assignees

• Sonos Inc

Inventors

• Gossain Hrishikesh
• Fox Gary
• Derderian Jeff
• Peters Jeffrey

Classifications

• G06F3/165 Primary

  Management of the audio stream, e.g. setting of volume, audio stream path · CPC title

• H04L65/602

  Electricity · mapped topic

• H04L65/762

  at the source  (reformatting of additional data in video distribution servers H04N21/2355) · CPC title