Patent ID: 8745145
Filing Date: 2014-06-03
Classification: H04L

Abstract:
1. A method for transmitting a large message mode Converged IP Messaging (CPM) message, which is used for transmitting a large message mode CPM message from a CPM client of a sender to a target user, when the target user is an unavailable CPM system user, the method comprising: respectively establishing a first Message Session Relay Protocol (MSRP) link between the CPM client of the sender and an originating participation function entity, a second MSRP link between the originating participation function entity and a terminating participation function entity, and a third MSRP link between the terminating participation function entity and an inter-working function entity; obtaining MSRP connection parameters of an opposite end by an establisher of each MSRP link through media negotiations and establishes the MSRP link according to the MSRP connection parameters by an establisher of each segment of MSRP link; and sending the large message mode CPM message by the CPM client of the sender to the inter-working function entity through each established MSRP link in sequence; and performing a protocol conversion on the received large message mode CPM message by the inter-working function entity and then transmitting the converted message to a non-CPM system by the inter-working function entity, wherein a process of media negotiations comprises: wherein the first, second and third MSRP links are established as follows: the CPM client of the sender establishes the first MSRP link according to the MSRP connection parameters of the originating participation function entity; the originating participation function entity establishes the second MSRP link according to the MSRP connection parameters of the terminating participation function entity; and the terminating participation function entity establishes the third MSRP link according to the MSRP connection parameters of the inter-working function entity; and wherein during a period between establishing the first MSRP link and establishing the second MSRP link, the method further comprises: the CPM client of the sender sends a first media transmission request, and the originating participation function entity receives the first media transmission request; and the MSRP connection parameters of the terminating participation function entity are obtained from the second success response message or from path head information of the first media transmission request; during a period between establishing the second MSRP link and establishing the third MSRP link, the method further comprises: the originating participation function entity transmits the media data included in the received first media transmission request via a second media transmission request, the terminating participation function entity receives the second media transmission request; and the MSRP connection parameters of the inter-working function entity are obtained from the third success response message or from path head information of the second media transmission request.