Method and device for configuring downlink scheduling information

1. A method for configuring downlink scheduling information, comprising:

allocating a downlink component carrier set and an uplink component carrier set to a user equipment transmitting a service request; and

selecting at least one component carrier from the downlink component carrier set as a component carrier in a Physical Downlink Control Channel, PDCCH, active component carrier set according to bandwidth information of respective carriers in a system, acquired type information of the user equipment, currently received channel quality information fed back from the user equipment, transmission modes allocated to respective component carriers in the downlink component carrier set and the uplink component carrier set, and a determined carrier scheduling mode of the user equipment, wherein the user equipment performs PDCCH blind detections for uplink and downlink scheduling in the PDCCH active component carrier set for a number of times which does not exceed the largest number of blind detections per sub-frame supported by the user equipment in the type information of the user equipment.

2. The method according to claim 1 , wherein selecting at least one component carrier from the downlink component carrier set as a component carrier in the PDCCH active component carrier set comprises:

taking a number N of component carriers with the highest channel quality in the downlink component carrier set as component carriers in the PDCCH active component carrier set;

determining a downlink carrier scheduling mode of the user equipment and the number of component carriers comprised in the PDCCH active component carrier set according to the bandwidth information of the respective carriers in the system, the type information of the user equipment, the currently received channel quality information fed back from the user equipment, and the transmission modes allocated to the respective component carriers in the downlink component carrier set, and determining an uplink carrier scheduling mode of the user equipment according to the bandwidth information of the respective uplink carriers in the system, the type information of the user equipment, a currently received uplink channel measurement result of the user equipment, and the transmission modes allocated to the respective component carriers in the uplink component carrier set; and

calculating the number of PDCCH blind detections performed by the user equipment for uplink and downlink scheduling in the PDCCH active component carrier set, determining whether the number of PDCCH blind detections exceeds the largest number of blind detections per sub-frame supported by the user equipment in the type information of the user equipment, and if not, allocating the PDCCH active component carrier set to the user equipment; otherwise, selecting a number N-M of component carriers from the downlink component carrier set as component carriers in a PDCCH active component carrier set, and continuing with the calculation,

wherein N is a natural number and not larger than the number of component carriers in the downlink component carrier set, and M is a smaller natural number than N.

3. The method according to claim 2 , wherein M is a fixed value preset for all the user equipments or a value preset for the largest number of blind detections per sub-frame supported by the user equipment.

4. The method according to claim 1 , wherein selecting at least one component carrier from the downlink component carrier set as a component carrier in the PDCCH active component carrier set comprises:

determining a level of the user equipment according to the type information of the user equipment, and acquiring the number of downlink component carriers corresponding to the determined level of the user equipment according to a preset correspondence relationship between the levels of the user equipment and the supported largest numbers of downlink component carriers;

selecting downlink component carriers, the number of which is smaller than the largest number of downlink component carriers, from the downlink component carrier set;

determining the carrier scheduling mode of the user equipment and the number of component carriers comprised in the PDCCH active component carrier set according to the bandwidth information of the respective carriers in the system, the type information of the user equipment, the currently received channel quality information fed back from the user equipment, and the transmission modes allocated to the respective component carriers in the downlink component carrier set, and determining an uplink carrier scheduling mode of the user equipment according to the bandwidth information of the respective uplink carriers in the system, the type information of the user equipment, a currently received uplink channel measurement result of the user equipment, the number of component carriers comprised in the PDCCH active component carrier set, and the transmission modes allocated to the respective component carriers in the uplink component carrier set; and

calculating the number of PDCCH blind detections performed by the user equipment for uplink and downlink scheduling in the PDCCH active component carrier set, determining whether the number of PDCCH blind detections exceeds the largest number of blind detections per sub-frame supported by the user equipment in the type information of the user equipment, and if not, allocating the PDCCH active component carrier set to the user equipment; otherwise, selecting component carriers, the number of which is the number of component carriers in the PDCCH active component carrier set corresponding to the next level of the user equipment, from the downlink component carrier set as the PDCCH active component carrier set, and continuing with the calculation.

5. The method according to claim 1 , wherein the transmission modes are allocated to the respective component carriers in the downlink component carrier set according to the currently received channel quality information fed back from the user equipment; and

the transmission modes are allocated to the respective component carriers in the uplink component carrier set according to uplink channel quality information currently measured by the user equipment.

6. The method according to claim 1 , wherein a downlink carrier scheduling mode of the user equipment is determined according to the currently received channel quality information fed back from the user equipment and current interference level information of the system.

7. The method according to claim 6 , wherein the downlink carrier scheduling mode of the user equipment is determined by:

determining a level of the user equipment according to the type information of the user equipment; and

determining the downlink carrier scheduling mode of the user equipment according to the determined level of the user equipment, the currently received channel quality information fed back from the user equipment and the current interference level information of the system.

8. The method according to claim 1 , wherein the type information of the user equipment is acquired by receiving a Radio Resource Control, RRC, message during an access of the user equipment.

9. A device for configuring downlink scheduling information, comprising:

a carrier allocating unit configured to allocate a downlink component carrier set and an uplink component carrier to a user equipment according to currently received channel quality information fed back from the user equipment, acquired type information of the user equipment and a service request of the user equipment; and

a PDCCH active carrier allocating unit configured to select at least one component carrier from the downlink component carrier set as a component carrier in a PDCCH active component carrier set according to bandwidth information of respective carriers in a system, the acquired type information of the user equipment, the currently received channel quality information fed back from the user equipment, transmission modes allocated to respective component carriers in the downlink component carrier set and the uplink component carrier set, and a determined carrier scheduling mode of the user equipment, and the PDCCH active component carrier set is provided for the user equipment to perform PDCCH blind detections for uplink and downlink scheduling for a number of times which does not exceed the largest number of blind detections per sub-frame supported by the user equipment in the type information of the user equipment.

10. The device according to claim 9 , wherein the PDCCH active carrier allocating unit is configured to take a number N of component carriers with the highest channel quality in the downlink component carrier set as component carriers in the PDCCH active component carrier set, wherein N is not larger than the number of component carriers in the downlink component carrier set; to determine a downlink carrier scheduling mode of the user equipment according to the bandwidth information of the respective carriers in the system, the type information of the user equipment, the currently received channel quality information fed back from the user equipment, and the transmission modes allocated to the respective component carriers in the downlink component carrier set; to determine an uplink carrier scheduling mode of the user equipment according to the bandwidth information of the respective uplink carriers in the system, the type information of the user equipment, a currently received uplink channel measurement result of the user equipment, the number of component carriers comprised in the PDCCH active component carrier set, and the transmission modes allocated to the respective component carriers in the uplink component carrier set; and to determine the number of component carriers comprised in the PDCCH active component carrier set, calculate the number of PDCCH blind detections performed by the user equipment for uplink and downlink scheduling in the PDCCH active component carrier set, determine whether the number of PDCCH blind detections exceeds the largest number of blind detections per sub-frame supported by the user equipment in the type information of the user equipment, and if not, allocate the PDCCH active component carrier set to the user equipment; otherwise, select a number N-M of component carriers from the downlink component carrier set as component carriers in a PDCCH active component carrier set, and perform the calculation again,

wherein N is a natural number and not larger than the number of component carriers in the downlink component carrier set, and M is a smaller natural number than N.

11. The device according to claim 10 , wherein M is a fixed value preset for all the user equipments or a value preset for the largest number of blind detections per sub-frame supported by the user equipment.

12. The device according to claim 9 , wherein the PDCCH active carrier allocating unit is configured to determine a level of the user equipment according to the type information of the user equipment, and acquire the number of downlink component carriers corresponding to the determined level of the user equipment according to a preset correspondence relationship between the levels of the user equipment and the supported largest numbers of downlink component carriers; to select downlink component carriers, the number of which is smaller than the largest number of downlink component carriers, from the downlink component carrier set; to determine the carrier scheduling mode of the user equipment and the number of component carriers comprised in the PDCCH active component carrier set according to the bandwidth information of the respective carriers in the system, the type information of the user equipment, the currently received channel quality information fed back from the user equipment, and the transmission modes allocated to the respective component carriers in the downlink component carrier set, and determine an uplink carrier scheduling mode of the user equipment according to the bandwidth information of the respective uplink carriers in the system, the type information of the user equipment, a currently received uplink channel measurement result of the user equipment, the number of component carriers comprised in the PDCCH active component carrier set, and the transmission modes allocated to the respective component carriers in the uplink component carrier set; and calculate the number of blind detections performed by the user equipment in the PDCCH active component carrier set, determine whether the number of blind detections exceeds the largest number of blind detections per sub-frame supported by the user equipment in the type information of the user equipment, and if not, allocate the PDCCH active component carrier set to the user equipment; otherwise, select component carriers, the number of which is the number of component carriers in the PDCCH active component carrier set corresponding to the next level of the user equipment, from the downlink component carrier set as a PDCCH active component carrier set, and perform the calculation again.

13. The device according to claim 9 , wherein the PDCCH active carrier allocating unit is configured to allocate the transmission modes to the respective component carriers in the downlink component carrier set according to the currently received channel quality information fed back from the user equipment, and to allocate the transmission modes to the respective component carriers in the uplink component carrier set according to uplink channel quality information currently measured by the user equipment.

14. The device according to claim 9 , wherein the PDCCH active carrier allocating unit is configured to determine a downlink carrier scheduling mode of the user equipment according to the currently received channel quality information fed back from the user equipment and current interference level information of the system.

15. The device according to claim 14 , wherein the PDCCH active carrier allocating unit is configured to determine a level of the user equipment according to the type information of the user equipment; and determine the downlink carrier scheduling mode of the user equipment according to the determined level of the user equipment, the currently received channel quality information fed back from the user equipment and the current interference level information of the system.

16. The device according to claim 14 , wherein the carrier allocating unit is configured to acquire the type information of the user equipment by receiving an RRC message during an access of the user equipment.