Scheduling transmission of messages relating to multimedia broadcast/multicast service (MBMS)
In a network, at least first and second messages ( 801, 802 ) are transmitted to a user equipment (UE) regarding multimedia point-to-multipoint services. The first messages comprise information regarding a first set of at least one service and the second messages comprise information regarding a second set of at least one service. The transmission of first messages is scheduled with a first periodicity (T 1 ) and the transmission of second messages is scheduled with a second periodicity (T 2 ), the first periodicity being independent from said second periodicity. Therefore, an overhead caused by transmitting of unnecessary information can be reduced.
1. A method of transmitting to a user equipment (UE) at least first and second messages regarding multimedia point-to-multipoint services in a network, the method comprising:
transmitting said first messages to the UE according to a first multicast control channel (MCCH) configuration for a first multimedia broadcast service single frequency network (MBSFN) area; and
transmitting said second messages to the UE according to a second MCCH configuration for a second MBSFN area,
said first messages comprising information regarding a first set of at least one service and said second messages comprising information regarding a second set of at least one service;
wherein the transmission of said first messages is scheduled with a first periodicity according to the first MCCH configuration and the transmission of said second messages is scheduled with a second periodicity according to the second MCCH configuration;
said first periodicity being independent from said second periodicity; and
wherein said first periodicity and said second periodicity are repetition periods in at least one modification period.
2. The method of claim 1 ,
wherein the first set of at least one service comprises unmodified service and the second set of at least one service comprises modified service; and
wherein the first periodicity is lower than the second periodicity.
3. The method of claim 1 , wherein the first periodicity and the second periodicity are defined according to characteristics of service in the first set and to characteristics of service in the second set, respectively.
4. The method of claim 3 , wherein the first set comprises at least one service offered in the first MBSFN area and the second set comprises at least one service offered in the second MBSFN area different from the first MBSFN area.
5. The method of claim 1 , wherein the first and second messages are transmitted on the multicast control channel (MCCH).
6. The method of claim 1 , wherein information indicating the first and second periodicities is sent to the UE before the transmission of said first messages and the transmission of said second messages.
7. A method of receiving by a user equipment (UE) at least first and second messages regarding multimedia point-to-multipoint services in a network, the method comprising:
receiving, by the UE, said first messages according to a first multicast control channel (MCCH) configuration for a first multimedia broadcast service single frequency network (MBSFN) area; and
receiving, by the UE, said second messages according to a second MCCH configuration for a second MBSFN area,
said first messages comprising information regarding a first set of at least one service and said second messages comprising information regarding a second set of at least one service;
wherein the reception of said first messages is scheduled with a first periodicity according to the first MCCH configuration and the reception of said second messages is scheduled with a second periodicity according to the second MCCH configuration,
said first periodicity being independent from said second periodicity; and
wherein said first periodicity and said second periodicity are repetition periods in at least one modification period.
8. The method of claim 7 ,
wherein the first set of at least one service comprises unmodified service and the second set of at least one service comprises modified service; and
wherein the first periodicity is lower than the second periodicity.
9. The method of claim 7 ,
wherein the first periodicity and the second periodicity are defined according to characteristics of service in the first set and to characteristics of service in the second set, respectively.
10. The method of claim 7 , wherein the first set comprises at least one service offered in the first MBSFN area and the second set comprises at least one service offered in the second MBSFN area different from the first MBSFN area.
11. The method of claim 7 , wherein information indicating the first and second periodicities is received by the UE before the reception of said first messages and the reception of said second messages.
12. A Radio Access Network in a Multimedia Broadcast/Multicast Service (MBMS) system offering multimedia point-to-multipoint services, said Radio Access Network comprising:
a transmitter adapted to transmit to a user equipment (UE) at least first and second messages regarding multimedia point-to-multipoint services in a network, wherein said first messages are transmitted according to a first multicast control channel (MCCH) configuration for a first multimedia broadcast service single frequency network (MBSFN) area, and wherein said second messages are transmitted according to a second MCCH configuration for a second MBSFN area, said first messages comprising information regarding a first set of at least one service and said second messages comprising information regarding a second set of at least one service; and
a scheduler adapted to schedule the transmission of said first messages with a first periodicity according to the first MCCH configuration and to schedule the transmission of said second messages with a second periodicity according to the second MCCH configuration, said first periodicity being independent from said second periodicity,
wherein said first periodicity and said second periodicity are repetition periods in at least one modification period.
13. A User Equipment (UE) in a Multimedia Broadcast/Multicast Service (MBMS) system offering multimedia point-to-multipoint services, said UE comprising:
a receiver adapted to receive at least first and second messages regarding multimedia point-to-multipoint services in a network, wherein said first messages are received according to a first multicast control channel (MCCH) configuration for a first multimedia broadcast service single frequency network (MBSFN) area, and wherein said second messages are received according to a second MCCH configuration for a second MBSFN area, said first messages comprising information regarding a first set of at least one service and said second messages comprising information regarding a second set of at least one service; and
a scheduler adapted to schedule the reception of said first messages with a first periodicity according to the first MCCH configuration and to schedule the reception of said second messages with a second periodicity according to the second MCCH configuration, said first periodicity being independent from said second periodicity,
wherein said first periodicity and said second periodicity are repetition periods in at least one modification period.