Method for multimedia broadcast/multicast service signaling bearer connection on iu interface

A method of signaling bearer connection on Iu interface for MBMS service, wherein SGSN establishes the shared signaling bearer for MBMS service, the method includes the following steps:

• (a) SGSN sends a MBMS Notification message to Radio Network Controller (RNC) after receiving the data sent from GGSN, notifies of relevant MBMS service information, and then waits for the response message from RNC;
• (b) after receiving a SCCP Connection Request message from RNC, SGSN separates the RANAP message included in the data fields and saves the Iu signaling connection ID allocated by RNC for this service, allocates the identifier of the signaling connection in SGSN, and constructs a SCCP Connection Confirmation message and a MBMS RAB Assignment Request message;
• (c) SGSN sends a SCCP Connection Confirmation message to RNC;
• (d) SGSN sends a MBMS RAB Assignment Request message to RNC via the shared Iu connection established, if the MBMS RAB Assignment Request message is included in the data field of the SCCP Connection Confirmation message, this step can be omitted.

A method of signaling bearer connection on Iu interface for MBMS service, in which SGSN establishes the shared signaling bearer for MBMS service on Iu interface, the method, comprising the steps of:

• (a) SGSN receives MBMS data from GGSN;
• (b) SGSN analyzes the on-going service, if there is no shared UE connection used for this service, it organizes a SCCP Connection Request message, which include a MBMS RAB Assignment Request message in its data field;
• (c) SGSN sends a SCCP Connection Request to ,RNC, requests to establish SCCP signaling connection, and then waits for a reply;
• (d) SGSN receives a SCCP Connection Confirmation message from RNC, which indicates the success of the shared Iu signaling connection establishment for this service.

A method of signaling bearer connection on Iu interface for MBMS service, wherein RNC establishes the shared signaling bearer for MBMS service on Iu interface, includes the following steps:

• (a) after receiving a SCCP Connection Request message from SGSN, RNC separates the RANAP message included in the data fields and saves the Iu signaling connection ID allocated by SGSN for this service;
• and allocates the identifier of the signaling connection in RNC and constructs a SCCP Connection Confirmation message and a MBMS RAB Assignment Response message;
• (b) RNC sends a SCCP Connection Confirmation message to SGSN;
• (c) RNC sends a MBMS RAB Assignment Response message to SGSN via the shared Iu connection established, if the MBMS RAB Assignment Response message is included in the data field of the SCCP Connection Confirmation message, this step can be omitted.