초록 ▼

A channel type switching method for Multimedia Broadcast and Multicast Service (MBMS) point-to-point (P-t-P) channel and point-to-multi point (P-t-M) channel is provided. When a user equipment (UE) moves to a cell in a drift radio network controller (DRNC) with an Iur interface, the DRNC decides to

A channel type switching method for Multimedia Broadcast and Multicast Service (MBMS) point-to-point (P-t-P) channel and point-to-multi point (P-t-M) channel is provided. When a user equipment (UE) moves to a cell in a drift radio network controller (DRNC) with an Iur interface, the DRNC decides to switch between a common channel and a dedicated channel and then notifies a serving radio network controller (SRNC) of MBMS channel type and common channel parameters.

대표청구항 ▼

What is claimed is: 1. A channel type switching method for a Multimedia Broadcast and Multicast Service (MBMS) Point to Point (P-t-P) and Point to Multi point (P-t-M) channel, when a UE having MBMS service moves to a cell in a Destination Radio Network Controller (DRNC) that has an Iur interface wi

What is claimed is: 1. A channel type switching method for a Multimedia Broadcast and Multicast Service (MBMS) Point to Point (P-t-P) and Point to Multi point (P-t-M) channel, when a UE having MBMS service moves to a cell in a Destination Radio Network Controller (DRNC) that has an Iur interface with a Serving Radio Network Controller (SRNC), comprising the steps of: determining in the DRNC, to perform switching channel type between the P-t-M channel and the P-t-P channel based on a number of users having the MBMS service in the cell; notifying the SRNC of the determined MBMS channel type from the DRNC; notifying in the SRNC, the UE to reconfigure an MBMS channel via a Radio Resource Control (RCC) message in order to perform channel type switching to the determined MBMS channel type; and transmitting MBMS data with the determined channel type to UEs requiring MBMS service. 2. The method as set forth in claim 1, wherein said channel switching is at least determined based on comparing a number of UEs requiring MBMS service to a threshold. 3. The method as set forth in claim 1, wherein said channel switching further comprises: the SRNC transmitting a radio link setup request message to the DRNC including at least one MBMS service identifier. 4. The method as set forth in claim 3, wherein said message transferred from the SRNC to the DRNC comprises an MBMS service identifier, which enables the DRNC to count a number of MBMS users. 5. The method as set forth in claim 3, wherein, if the UE is first in requesting MBMS service in the DRNC, the DRNC sets up a radio access bearer (RAB) connection with a core network. 6. The method as set forth in claim 1, wherein said channel switching further comprises: sending, by the SRNC, a radio link setup request message to the DRNC to request a radio link setup; and determining, by the DRNC, a channel type at least based on a number of UEs that require MBMS service and informing the SRNC of the channel type. 7. The method as set forth in claim 1, wherein said channel switching further comprises: the SRNC sending a message to inquire about MBMS service type from the DRNC; the DRNC determining a channel type to be set up and informing the SRNC of the parameters of MBMS channel set up; and the SRNC completing setting up the P-t-P channel or obtaining a P-t-M channel information from the DRNC. 8. A channel type switching method for a Multimedia Broadcast and Multicast Service (MBMS) Point to Point (P-t-P) and Point to Multi point (P-t-M) channel in a radio network controller, comprising: checking a number of User Equipments (LIEs) in a cell to determine an MBMS channel type; determining the MBMS channel type by comparing the number of UEs that require MBMS service to a threshold; reporting change of the MBMS channel type to a serving radio network controller (SRNC); and receiving in the SRNC, the MBMS channel type from a Destination Radio Network Controller (DRNC), and notifying in the SRNC, the UE to reconfigure an MBMS channel via a Radio Resource Control (RRC) message in order to perform channel type switching to the MBMS channel type. 9. The method as set forth in claim 8, further comprising: receiving, at the SRNC, the MBMS channel type from a destination radio network controller (DRNC); and transmitting a channel reconfiguration request message to the UE. 10. A channel type switching method for a Multimedia Broadcast and Multicast Service (MBMS) Point to Point (P-t-P) and Point to Multi point (P-t-M) channel, comprising the steps of: transmitting, from a Serving Radio Network Controller (SRNC), a radio link setup message to a Destination Radio Network Controller (DRNC); transmitting from the DRNC, an MBMS channel type to the SRNC upon receiving the radio link setup message in the DRNC; notifying, at the SRNC, a User Equipment (UE) that requires MBMS service to reconfigure the MBMS channel type via a Radio Resource Control (RRC) message; receiving, at the UE, the MBMS channel type; and receiving MBMS data on an MBMS channel using the MBMS channel type, wherein the MBMS channel type is one of the P-t-P channel or the Pt-M channel. 11. The method as set forth in claim 10, wherein the radio link setup message comprises an MBMS service identifier.