US 12,323,235 B2
In-band signaling for ingress PTP packets at a master entity
Santosh Ajjannavar, Belguam (IN); Irfaan Ahamed Salahuddeen, Acton, MA (US); and Maunang Contractor, Bangalore (IN)
Assigned to CommScope Technologies LLC, Claremont, NC (US)
Filed by CommScope Technologies LLC, Hickory, NC (US)
Filed on Dec. 1, 2022, as Appl. No. 18/073,399.
Claims priority of application No. 202141055966 (IN), filed on Dec. 2, 2021.
Prior Publication US 2023/0179314 A1, Jun. 8, 2023
Int. Cl. H04J 3/06 (2006.01)
CPC H04J 3/0667 (2013.01) 20 Claims
OG exemplary drawing
 
14. A method of using in-band signaling with a first system having a memory space in memory of the first system that is logically partitioned into a kernel space and a user space, the method used to communicate timestamp information from the kernel space of the memory space to the user space of the memory space, the method comprising, for a timing message received by a network interface of the first system, the timing message generated by a second system in accordance with a packet-based synchronization protocol and transmitted from the second system over a packet network to the first system:
in the kernel space of the memory space:
capturing a timestamp associated with a time the timing message was received by the network interface; and
modifying the timing message to include timing information associated with the time the timing message was received by the network interface thereby producing a modified timing message; and
in the user space of the memory space:
accessing the modified timing message; and
extracting the timing information included in the modified timing message for use in implementing at least a part of the packet-based synchronization protocol.