Abstract: One embodiment is directed to a technique for in-band signaling of time stamp information where a kernel driver executing in kernel space modifies a received timing message (for example, a Precision Time Protocol (PTP) Delay Request message) to include timing information associated with the time the timing message was received by a network interface. This is done so that an application running in the user space can obtain the timing information from the modified timing message and reconstruct a timestamp for the received timing message (for example, a PTP T4 timestamp) for use in implementing at least a part of a packet-based synchronization protocol (for example, the PTP).

Abstract: One embodiment is directed to a multi-carrier radio point for use in a radio access network (RAN). The multi-carrier radio point is configured so that some of the processing and hardware resources provided by the radio point can be assigned to baseband units (BBUs) in a flexible manner. A single multi-carrier radio point can be used with multiple BBUs, where the processing and hardware resources used for the multiple BBUs need not be configured and used in the same way.

Abstract: One embodiment is directed to a multi-carrier radio point for use in a centralized radio access network (C-RAN). The multi-carrier radio point is configured so that the processing and hardware resources provided by the radio point can be associated with controllers of the C-RAN in a flexible manner. A single multi-carrier radio point can be used with multiple controllers to serve multiple cells, where the processing and hardware resources used for the multiple controllers need not be configured and used in the same way.

Abstract: One embodiment is directed to a multi-carrier radio point for use in a centralized radio access network (C-RAN). The multi-carrier radio point is configured so that the processing and hardware resources provided by the radio point can be associated with controllers of the C-RAN in a flexible manner. A single multi-carrier radio point can be used with multiple controllers to serve multiple cells, where the processing and hardware resources used for the multiple controllers need not be configured and used in the same way.

Abstract: A method and system for enabling a first communication device to communicate with a second communication device. The first communication device is in a first network. The second communication device is in a second network. The second communication device has network connectivity only in its home network. When a first call for the second communication device is received from the first communication device, roaming on the second communication device is enabled and the location of the second communication device is determined. After determining the location of the second communication device, the first call is routed to the second communication device.