Method and apparatus of resource management for multimedia broadcast multicast services
A method and apparatus of resource management for multimedia broadcast multicast services (MBMS) are disclosed. A wireless transmit/receive unit (WTRU) sends a measurement report and an MBMS reception performance report to a network. Single frequency network (SFN) area change may be made based on cell reselection information, WTRU macro-diversity MBMS reception performance, neighbor cell signal strength reported by a WTRU, interference level measured by the WTRU, a number of WTRUs in a cell, service priority, WTRU class, WTRU mobility trend, WTRU location to a cell center, WTRU MBMS reception interference level, etc. The MBMS service on/off decision and/or point-to-point (PTP) to point-to-multipoint (PTM) switching may be made based on a channel condition of a WTRU. The channel condition may be determined based on whether the WTRU is in in-sync or out-of-sync in MBMS reception, consecutive negative acknowledgements (NAKs) within a certain time window, measured pathloss from a reference channel, etc.
1. A method of resource management for multimedia broadcast multicast services (MBMS), the method comprising:
performing measurement of signals from neighbor cells;
performing MBMS reception performance evaluation based on MBMS macro-diversity reception from a plurality of cells; and
sending a measurement report and an MBMS reception performance report for single frequency network (SFN) area configuration, wherein the measurement report and the MBMS reception performance report are sent on a condition the MBMS reception performance is below a configured threshold for a configured period of time.
2. The method of claim 1 further comprising:
detecting that a current location is near an SFN area edge, wherein the measurement report and the MBMS reception performance report are sent whenever the SFN area edge is detected.
3. The method of claim 1 wherein the measurement report is combined with one of a tracking area (TA) update message and a routing area (RA) update message.
4. The method of claim 1 further comprising:
detecting an SFN identity (ID) change by reading broadcast channel information; and
reporting the SFN ID change.
5. The method of claim 1 further comprising:
sending one of a cell update message and a radio resource control (RRC) connection request message along with an information element (IE) indicating cell identities (IDs) of all cells being used for macro-diversity MBMS reception if the cell update message and the RRC connection request message are sent for counting purpose.
6. The method of claim 1 further comprising:
if point-to-point (PTP) MBMS transmission is configured, indicating whether MBMS service will be continuously received or suspended and if the MBMS service reception is planned to be suspended, whether the suspension is temporary or not.
7. A wireless transmit/receive unit (WTRU) for resource management for multimedia broadcast multicast services (MBMS), the WTRU comprising:
a measurement unit for performing measurement of signals from neighbor cells;
a processing unit for performing MBMS reception performance evaluation based on MBMS macro-diversity reception from a plurality of cells; and
a controller for sending a measurement report and an MBMS reception performance report for single frequency network (SFN) area configuration, wherein the controller detects that a current location is near an SFN area edge and sends the measurement report and the MBMS reception performance report on a condition the SFN area edge is detected.
8. The WTRU of claim 7 wherein the measurement report and the MBMS reception performance report are sent if the MBMS reception performance is below a configured threshold for a configured period of time.
9. The WTRU of claim 7 wherein the measurement report is combined with one of a tracking area (TA) update message and a routing area (RA) update message.
10. The WTRU of claim 7 wherein the controller detects an SFN identity (ID) change based on broadcast channel information and reports the SFN ID change.
11. The WTRU of claim 7 wherein the controller sends one of a cell update message and a radio resource control (RRC) connection request message along with an information element (IE) indicating cell identities (IDs) of all cells being used for macro-diversity MBMS reception if the cell update message and the RRC connection request message are sent for counting purpose.
12. The WTRU of claim 7 wherein the controller is configured to, if point-to-point (PTP) MBMS transmission is configured, indicate whether MBMS service will be continuously received or suspended and if the MBMS service reception is planned to be suspended, whether the suspension is temporary or not.