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CA (Carrier Aggregation)-based across-carrier scheduling method and CA-based across-carrier scheduling device

A cross-carrier scheduling and carrier aggregation technology, applied in electrical components, wireless communication, etc., to achieve system performance improvement, increase success probability, and improve resource utilization

Active Publication Date: 2014-06-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to reduce the complexity of blind detection, the cross-carrier scheduling is restricted, that is, the shared channel on a certain carrier can only be scheduled through one carrier, and two principles are followed at the same time: (1) PCC data transmission can only be through PCC PDCCH scheduling; (2) SCC uplink and downlink data transmission must be scheduled through the same downlink carrier
Since control signaling such as system messages is only allowed to be transmitted on the PCC, and the PCC cannot be scheduled by the SCC, cross-carrier scheduling is only applied to the scheduling of UE service data, and the scheduling of control signaling such as system messages and paging messages cannot use cross-carrier scheduling. scheduling

Method used

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  • CA (Carrier Aggregation)-based across-carrier scheduling method and CA-based across-carrier scheduling device
  • CA (Carrier Aggregation)-based across-carrier scheduling method and CA-based across-carrier scheduling device
  • CA (Carrier Aggregation)-based across-carrier scheduling method and CA-based across-carrier scheduling device

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Embodiment Construction

[0055] The embodiment of the present invention proposes a cross-carrier scheduling scheme based on carrier aggregation, which considers factors such as PDCCH load transfer amount and channel quality on all carriers, and uses component carrier admission control to complete the cross-carrier scheduling related decision-making process. This scheme uses the PDCCH load and PDCCH channel quality of each component carrier to complete the activation / deactivation of cross-carrier scheduling and the selection process of PDCCH CC (associated component carrier) under cross-carrier scheduling according to certain criteria, so that all cross-carrier The SCC scheduling signaling of carrier scheduling users is transmitted through the best PDCCH CC, which improves the success probability of SCC scheduling signaling transmission, improves the resource utilization of its traffic channels, and ultimately improves system performance.

[0056] In order to make the object, technical solution and adva...

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PUM

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Abstract

The invention discloses a CA (Carrier Aggregation)-based across-carrier scheduling method and a CA-based across-carrier scheduling device. According to the CA-based across-carrier scheduling method and the CA-based across-carrier scheduling device, disclosed by the invention, the activation of across-carrier scheduling can be selected and completed by a PDCCH (Physical Downlink Control Channel) CC (Component Carrier) under the across-carrier scheduling by utilizing the load and the channel quality of a PDCCH of each CC and combining the user number admission control on the CC, thus scheduling signals of SCCs (Secondary Component Carriers) of all across-carrier scheduling users can be transmitted through a better PDCCH CC, the success probability of transmitting the scheduling signals of the SCCs is increased, the resource utilization rate of a business channel is increased, and finally, the system performance is promoted.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for cross-carrier scheduling based on carrier aggregation. Background technique [0002] LTE-A (Long Term Evolution Advanced, Advanced Long Term Evolution) R10 (Release10, version 10) introduces the CA (Carrier Aggregation, carrier aggregation) feature, which allows a UE (User's Equipment, user equipment) to aggregate multiple carriers at the same time, which is much Carriers serve the UE together, and support cross-carrier scheduling of uplink / downlink shared channels. The introduction of cross-carrier scheduling is mainly to solve the problem that in the actual system, the PDCCH (Physical Downlink Control Channel) allocation failure rate of a CC (Component Carrier, component carrier) is high or the PDCCH channel quality is poor. The scheduling signaling cannot be transmitted successfully, which will affect the system performance. [0003] When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/12
Inventor 李红宏
Owner DATANG MOBILE COMM EQUIP CO LTD
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