Patent ID: 11963121
Assignee: RUCKUS IP HOLDINGS LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 15:
16. A method for selecting a synchronization master, comprising:
by a radio node:
arbitrating with other radio nodes in a set of radio nodes in a cellular-telephone network based on a selection technique to select the synchronization master in the set of radio nodes, wherein the set of radio nodes comprises the radio node,
wherein the synchronization master specifies time, frequency, and phase synchronization for the set of radio nodes, and
wherein the selection technique comprises:
determining a type of communication environment of the set of radio nodes, wherein the determined type of radio environment specifies a predefined synchronization performance of the synchronization master,
wherein, when the determined type of communication environment excludes overlap between the set of radio nodes and a macrocell in the cellular-telephone network, the synchronization master is a given radio node in the set of radio nodes that:
detects signals from a global position system (GPS) within a time interval;
when the signals from the GPS are not detected by the set of radio nodes within the time interval, has the predefined synchronization performance in a precision time protocol (PTP); and
when the set of radio nodes do not have the predefined synchronization performance in the PTP, has a crystal oscillator with a largest stability in the set of radio nodes; and

when the synchronization master is different from the radio node, synchronizing with the synchronization master.