Apparatus and method for allocating resources for coordinated transmissions from multiple cells

1. An apparatus comprising:

at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive from an upper scheduler data for user terminals served by the apparatus, wherein a first set of terminals is connected to more than one cell and a second set of user terminals is not connected to more than one cell, wherein the data for user terminals includes first user terminal data and second user terminal data, and wherein a first user terminal of the first set of terminals is configured to receive the first user terminal data as synchronized transmissions from more than one cell and a second user terminal of the second set of user terminals is configured to receive the second user terminal data from a single cell;

receive from the upper scheduler physical layer resources to be allocated for the first set of user terminals; and

determine by the apparatus physical layer resources for the second set of user terminals and allocate the received and determined resources for the user terminals

wherein the apparatus is configured to take care of time critical aspects of scheduling for the user terminals.

2. The apparatus of claim 1 , further configured to receive from the upper scheduler physical layer resources to be allocated for a first transmission to user terminals of the first set.

3. The apparatus of claim 1 , further configured to allocate resources for retransmissions on the basis of channel quality information received from user terminals.

4. The apparatus of claim 1 , further configured to receive from the upper scheduler connection parameters for the connections of the first and second set of user terminals.

5. The apparatus of claim 4 , wherein the connection parameters comprise channel coding rate and modulation method of each connection.

6. The apparatus of claim 1 , wherein the time critical aspects of scheduling comprises at least one of decisions on modulation, coding details and retransmission handling.

7. An apparatus comprising:

at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive from a network element data for user terminals served by a lower scheduler, wherein a first set of terminals is connected to more than one cell and a second set of user terminals is not connected to more than one cell, wherein the data for user terminals includes first user terminal data and second user terminal data, and wherein a first user terminal of the first set of terminals is configured to receive the first user terminal data as synchronized transmissions from the more than one cell and a second user terminal of the second set of user terminals is configured to receive the second user terminal data from a single cell;

determine by the apparatus physical layer resources for the first set of user terminals; and

send information regarding the determined resources and the received data to the lower scheduler, wherein the lower scheduler is configured to take care of time critical aspects of scheduling for the user terminals.

8. The apparatus of claim 7 , further configured to allocate resources for retransmissions for user terminals served by the apparatus.

9. The apparatus of claim 7 , further configured to determine connection parameters for the connections of the user terminals.

10. The apparatus of claim 9 , wherein the connection parameters comprise channel coding rate and modulation method of the connection.

11. The apparatus of claim 9 , further configured to send the information regarding the determined resources of the user terminals of the first set to the lower scheduler of each cell the terminals are connected to.

12. The apparatus of claim 7 , further configured to receive information on measurements made by user terminals.

13. The apparatus of claim 12 , further configured to determine the physical layer resources on the basis of the information on measurements made by user terminals.

14. The method of claim 12 , wherein the time critical aspects of scheduling is at least one of decisions on modulation, coding details and retransmission handling.

15. A method comprising:

receiving from a upper scheduler data for user terminals served by the apparatus, wherein a first set of terminals is connected to more than one cell and a second set of user terminals is not connected to more than one cell, wherein the data for user terminals includes first user terminal data and second user terminal data, and wherein a first user terminal of the first set of terminals is configured to receive the first user terminal data as synchronized transmissions from the more than one cell and a second user terminal of the second set of user terminals is configured to receive the second user terminal data from a single cell;

receiving from an upper scheduler data for user terminals served by the apparatus, wherein a first set of terminals is connected to more than one cell and a second set of user terminals is not connected to more than one cell;

receiving from the upper scheduler physical layer resources to be allocated for the first set of user terminals;

determining physical layer resources for the second set of user terminals and

allocating the received and determined resources for the user terminals wherein the apparatus is configured to take care of time critical aspects of scheduling for the user terminals.

16. The method of claim 15 , further comprising: allocating resources for retransmissions for the first and second set of user terminals served by the apparatus.

17. The method of claim 15 , further comprising: receiving from the upper scheduler physical layer resources to be allocated for a first transmission of user terminals of the first set.

18. The method of claim 15 , further comprising: allocating resources for retransmissions on the basis of channel quality information received from user terminals.

19. The method of claim 15 , further comprising: receiving from the upper scheduler connection parameters for the connections of the first and second set of user terminals, wherein the connection parameters comprise channel coding rate and modulation method of each connection.

20. A non-transitory computer readable medium storing a program of instructions, execution of which by a processor configures an apparatus to at least:

receive from an upper scheduler data for user terminals served by the apparatus, wherein a first set of terminals is connected to more than one cell and a second set of user terminals is not connected to more than one cell, wherein the data for user terminals includes first user terminal data and second user terminal data, and wherein a first user terminal of the first set of terminals is configured to receive the first user terminal data as synchronized transmissions from the more than one cell and a second user terminal of the second set of user terminals is configured to receive the second user terminal data from a single cell;

receive from the upper scheduler physical layer resources to be allocated for the first set of user terminals;

determine by the apparatus physical layer resources for the second set of user terminals; and

allocate the received and determined resources for the user terminals and take care of time critical aspects of scheduling for the user terminals.