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

Claim 0:
1. A radio node, comprising:
one or more antenna nodes configured to couple to an antenna; and
an interface circuit, coupled to the one or more antenna nodes, configured to communicate with other radio nodes in a set of radio nodes in a cellular-telephone network, wherein the set of radio nodes comprise the radio node, and wherein the radio node is configured to perform operations comprising:
arbitrating with the other radio nodes based on a selection technique to select a synchronization master in the set of radio nodes, 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.