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US 9,426,763 B2Granted
Systems and methods for synchronizing timing between wireless networking devices
AssigneeQUALCOMM Incorporated
InventorsMaarten Menzo Wentink, Didier Johannes Richard Van Nee, Carlos Horacio Aldana
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Abstract
Systems and methods are provided for synchronizing a timing of one or more access points in an area. The systems and methods utilize a timestamp frame exchange between the one or more access points based on a timestamp refresh interval that is changed after each timestamp frame exchange is performed.
Claims20
A method for synchronizing a timing of a first device with a second device in communication with the first device, comprising:
- moving, by the first device, to a channel associated with the second device when a timestamp refresh interval expires;
- transmitting, by the first device, a timestamp request frame from the first device to the second device when the timestamp refresh interval expires;
- receiving, by the first device, a timestamp response frame, the timestamp response frame including a time value representative of an internal clock of the second device;
- updating, by the first device, a clock of the first device based on the time value in the timestamp response frame;
- moving, by the first device, to an original channel after receiving the timestamp response frame;
- and
- selecting, by the first device, a new timestamp refresh interval.
4 more elements
A method for synchronizing a timing of a first device with a second device in communication with the first device, comprising:
- moving, by the first device, to a channel associated with the second device when a timestamp refresh interval expires;
- transmitting, by the first device, a timestamp indication frame from the first device to the second device when the timestamp refresh interval expires, the timestamp indication frame including a time value representative of an internal clock of the first device;
- receiving, by the first device, an acknowledgment frame from the second device;
- moving, by the first device, to an original channel after receiving the acknowledgment frame;
- and
- selecting, by the first device, a new timestamp refresh interval.
3 more elements
A wireless access point, comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured to:
- determine when a timestamp refresh interval expires,
- move to a channel associated with a different wireless access point based on the determination that the timestamp refresh interval has expired,
- transmit a timestamp request frame when the timestamp refresh interval expires,
- receive a timestamp response frame including a time value representative of an internal clock of a different wireless access point in response to the transmitted timestamp request frame,
- store the time value,
- update a local clock based on the time value in the timestamp response frame,
- move to an original channel after receiving the timestamp response frame, and
- select a new timestamp refresh interval.
8 more elements
A wireless access point, comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured to:
- determine when a timestamp refresh interval expires,
- move to a channel associated with a different wireless access point based on the determination that the timestamp refresh interval has expired,
- transmit a timestamp indication frame to the different wireless access point when the timestamp refresh interval expires, the timestamp indication frame including a time value representative of an internal clock of the wireless access point,
- receive an acknowledgment frame from the different wireless access point,
- move to an original channel after receiving the acknowledgment frame, and
- select a new timestamp refresh interval.
6 more elements
A first device for wireless communication, comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured to:
- move to a channel associated with a second device when a timestamp refresh interval expires;
- transmit a timestamp request frame from the first device to the second device when the timestamp refresh interval expires;
- receive, by the first device, a timestamp response frame, the timestamp response frame including a time value representative of an internal clock of the second device;
- update a clock of the first device based on the time value in the timestamp response frame;
- move to an original channel after receiving the timestamp response frame;
- and
- select a new timestamp refresh interval.
7 more elements
A first device for wireless communication, comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured to:
- move to a channel associated with a second device when a timestamp refresh interval expires;
- transmit a timestamp indication frame from the first device to the second device when the timestamp refresh interval expires, the timestamp indication frame including a time value representative of an internal clock of the first device;
- receive, by the first device, an acknowledgment frame from the second device;
- move to an original channel after receiving the acknowledgment frame;
- and
- select a new timestamp refresh interval.
6 more elements
Dependencies are inferred from the claim text.