Method for determining delay parameters for user data flow synchronization for eMBMS

摘要

In order to calculate a delay parameter for synchronized data transmission in a cellular communications network, a service center transmits a message to a base station including a transmission time. Upon receipt of the message, the base station determines a time of receipt of the message. A delay parameter is then determined by the base station as the difference between the time of receipt and the time of transmission. In one embodiment, the delay parameter is transmitted back to the service center by the base station.

主权项

1. A service center for Multimedia Broadcast Multicast Services, MBMS, in a Long Term Evolution, LTE, cellular communications network where the service center is a Broadcast Multicast Service Center, BM-SC, for use in an enhanced Multimedia Broadcast Multicast Service, eMBMS, of the LTE cellular communications network comprising:
a communications subsystem configured to communicably couple the service center to a core network of the cellular communication network; and a processing subsystem associated with the communications subsystem and configured to:
transmit a message including a transmit time from the service center to a base station of the LTE cellular communications network via the communications subsystem where the message is an eMBMS SYNC Protocol Data Unit, PDU;receive a delay parameter from the base station via the communications subsystem that defines a delay between the service center and the base station in response to transmitting the message;transmit a second message including a second transmit time from the service center to the base station of the LTE cellular communications network via the communications subsystem where the message is the eMBMS SYNC PDU; andreceive a second delay parameter from the base station via the communications subsystem that defines a second delay between the service center and the base station in response to transmitting the second message.