Physical downlink control channel sending method and base station for cross-carrier scheduling

A technology of physical downlink control and cross-carrier scheduling, which is applied in transmission path sub-channel allocation, wireless communication, pilot signal allocation, etc., and can solve problems such as the inability to indicate aperiodic SRS transmission and the inability to indicate PUSCH transmission.

Active Publication Date: 2011-01-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The main purpose of the present invention is to provide a PDCCH transmission method and base station for cross-carrier scheduling, to at least solve the above-mentioned LTE-A system, when CQI request=1 in the PDCCH for scheduling PUSCH containing CIF, CIF uses When instructing the UE to feed back the aperiodic CSI report of the specified component carrier, the PDCCH cannot indicate which component carrier the scheduled PUSCH is sent on and when the PDCCH containing CIF triggers the aperiodic SRS, the PDCCH cannot indicate its One of the issues on which component carrier the triggered aperiodic SRS is sent on

Method used

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  • Physical downlink control channel sending method and base station for cross-carrier scheduling
  • Physical downlink control channel sending method and base station for cross-carrier scheduling
  • Physical downlink control channel sending method and base station for cross-carrier scheduling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In the LTE-A FDD system, the base station configures a pair of primary component carriers DL CC0 and UL CC0, a pair of secondary component carriers DL CC1 and UL CC1, and two downlink secondary component carriers DL CC2 and DL CC3 for a certain UE. The uplink secondary component carriers UL CC2 and UL CC3 associated with SIB-2 are not configured for the UE).

[0050] Under cross-carrier scheduling, only DL CC0 or DL ​​CC1 can be configured as the UE's PDCCH CC, and DL CC2 or DL ​​CC3 cannot be configured as the UE's PDCCH CC.

[0051] For the UE, configure DL CC0 as the PDCCH CC, and the PDCCH sent on DL CC0 can schedule DL CC0 and UL CC0, DL CC1 and UL CC1, and DL CC2 and DL CC3.

[0052] When the UE detects its PDCCH for scheduling the PUSCH on DL CC0, and CQI request=1, the CIF contained in the PDCCH is used to instruct the UE to feed back the aperiodic CSI report of the specified component carrier. And the PDCCH schedules the UE to send the PUSCH on UL CC0.

[005...

Embodiment 2

[0072] In the LTE-A FDD system, the base station configures a pair of primary component carriers DL CC0 and UL CC0, a pair of secondary component carriers DL CC1 and UL CC1, and two downlink secondary component carriers DL CC2 and DL CC3 for a certain UE. The uplink secondary component carriers UL CC2 and UL CC3 associated with SIB-2 are not configured for the UE).

[0073] (1) For the UE, configure DL CC0 as the PDCCH CC, and the PDCCH sent on DL CC0 can schedule DL CC0 and UL CC0, DL CC1 and UL CC1, and DL CC2 and DL CC3.

[0074] When the UE detects its PDCCH for scheduling the PUSCH on DL CC0, and CQI request=1, the CIF contained in the PDCCH is used to instruct the UE to feed back the aperiodic CSI report of the specified component carrier. The PDCCH schedules the UE to send the PUSCH on the UL CC0 with the smallest component carrier index among the uplink component carriers that can be scheduled by the DL CC0.

[0075] When the UE detects its PDCCH for scheduling PDSCH ...

Embodiment 3

[0083] In the LTE-A TDD system, the base station configures one primary component carrier CC0 and three secondary component carriers CC1, CC2 and CC3 for the UE.

[0084] (1) If CC2 is configured as a PDCCH CC for the UE, and the PDCCH sent on CC2 can schedule CC0 (its CIF value is 2), CC1 (its CIF value is 3), and CC2 (its CIF value is 0), CC3 (which has a CIF value of 1).

[0085] When the UE detects its PDCCH for scheduling the PUSCH on CC2, and CQI request=1, the CIF is used to instruct the UE to feed back the aperiodic CSI report of the specified component carrier. The PDCCH schedules the UE to send the PUSCH on CC1 with the largest CIF value among component carriers that can be scheduled by CC2.

[0086] When the UE detects its PDCCH on CC2 for scheduling the PDSCH, and the PDCCH triggers an aperiodic SRS, the CIF contained in the PDCCH is used to indicate the component carrier where the PDSCH scheduled by the PDCCH is located. The PDCCH schedules the UE to send the ap...

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Abstract

The invention discloses a PDCCH (Physical Downlink Control Channel) sending method and a base station for cross-carrier scheduling. The method comprises the following steps that: in FDD (Frequency Division Duplex) system, the base station configures a downlink component carrier configured to UE (User Equipment) as a component carrier of the UE for implementing cross-carrier scheduling, wherein the uplink component carrier corresponding to the downlink component carrier is configured to the UE; the base station sends PDCCH to the UE on the downlink component carrier; the UE sends PUSCH (Physical Uplink Shared Channel) scheduled by the PDCCH to the base station on the uplink component carrier when the PDCCH triggers an aperiodic CSI (Channel State Information) report; or, the base station sends PDCCH to the UE on the downlink component carrier; and the UE sends SRS (Sounding Reference Signal) triggered by the PDCCH to the base station on the uplink component carrier when the PDCCH triggers an aperiodic SRS report.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a physical downlink control channel (Physical Downlink Control Channel, PDCCH) transmission method for cross-carrier scheduling and a base station. Background technique [0002] In the 3rd Generation Partnership Project Long Term Evolution (The 3rd Generation Partnership Project Long Term Evolution, 3GPP LTE), the user equipment (User Equipment, UE) obtains the channel state information (Channel State) of the downlink channel according to the downlink reference signal (reference signal). Information, CSI), and then feed back the obtained CSI to the base station (eNodeB, eNB). According to the CSI fed back by the UE, the base station determines the modulation and coding scheme, physical resource location, and transmission mode of the data sent to the UE. In the LTE system, CSI includes three forms: channel quality indication (Channels Quality Indication, CQI), precoding matrix ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04W72/04H04W72/12
CPCH04L5/0091H04L5/001H04L5/0048
Inventor 朱鹏左志松喻斌戴博吴欣
Owner ZTE CORP
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