US 2017/0374633 A1 · REAL-TIME TRANSPORT PROTOCOL RTP PACKET TRANSMISSION METHOD AND APPARATUS

Abstract

Embodiments of the present disclosure provide an RTP packet transmission method and apparatus. A GCS AS or a BM-SC provides synchronization source information of the GCS AS and synchronization source information of the BM-SC for UE, so that the UE can continuously receive RTP packets. On one hand, the GCS AS (or the BM-SC) may provide the synchronization source information of the GCS AS (or the synchronization source information of the BM-SC) for the UE by sending an RTP packet. On the other hand, the GCS AS (or the BM-SC) further provides the synchronization source information of the BM-SC (or the synchronization source information of the GCS AS) for the UE. Therefore, when being in a unicast (multicast) transmission mode, the UE can obtain both of the synchronization source information of the GCS AS and the synchronization source information of the BM-SC.

Claims20

Dependent claims

A group communication service application server (GCS AS), comprising:

a receiver, configured to obtain synchronization source information of a broadcast/multicast service center (BM-SC);
and
a transmitter, configured to send, to user equipment (UE), the synchronization source information of the BM-SC or synchronization source reference information of the BM-SC, and a Real-Time Transport Protocol (RTP) packet that comprises synchronization source information of the GCS AS, wherein the synchronization source reference information of the BM-SC comprises information determined according to the synchronization source information of the BM-SC and the synchronization source information of the GCS AS.

A broadcast/multicast service center (BM-SC), comprising:

a receiver, configured to obtain synchronization source information of a group communication service application server (GCS AS);
and
a transmitter, configured to send, to user equipment (UE), the synchronization source information of the GCS AS or synchronization source reference information of the GCS AS, and a Real-Time Transport Protocol (RTP) packet that comprises synchronization source information of the BM-SC, wherein the synchronization source reference information of the GCS AS comprises information determined according to the synchronization source information of the GCS AS and the synchronization source information of the BM-SC.

User equipment (UE), comprising:

a receiver, configured to:
receive synchronization source information of a second network side device sent by a first network side device or synchronization source reference information of a second network side device sent by a first network side device, and
receive a Real-Time Transport Protocol (RTP) packet sent by the first network side device and that comprises synchronization source information of the first network side device;
a processor, configured to:
obtain the synchronization source information of the first network side device and the synchronization source information of the second network side device,
save both the synchronization source information of the first network side device and the synchronization source information of the second network side device in a trust list of the UE, and
wherein the synchronization source reference information of the second network side device is information determined according to the synchronization source information of the first network side device and the synchronization source information of the second network side device;
and
wherein the first network side device is a broadcast/multicast service center (BM-SC) and the second network side device is a group communication service application server (GCS AS), or the first network side device is a GCS AS and the second network side device is a BM-SC.

6 more elements

Dependencies are inferred from the claim text.

Real-time transport protocol rtp packet transmission method and apparatus

Life of this patent

Real-time transport protocol rtp packet transmission method and apparatus

Life of this patent

Abstract

Claims20