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LTEPDCCH (Long Term Evolution System Physical Downlink Control Channel) blind inspection control method and device

A control method and a technology for physical downlink control, which are applied in the field of blind detection control methods and devices for LTE PDCCH, can solve the problems of large computational load, long search time, and high probability of false detection, and achieve the effect of reducing the number of blind detections

Active Publication Date: 2011-11-23
合肥东芯通信股份有限公司
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Problems solved by technology

[0017] In view of this, the present invention provides a blind detection control method and device for LTE PDCCH to overcome the unnecessary system power consumption caused by the large amount of calculation, long search time and high probability of false detection in the prior art. The problem

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  • LTEPDCCH (Long Term Evolution System Physical Downlink Control Channel) blind inspection control method and device

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Embodiment 1

[0095] Please refer to the attached figure 2 , is a flow chart of a blind detection control method for an LTE PDCCH disclosed by the present invention, mainly comprising the following steps:

[0096] Step S101, obtain the number of CCEs occupied by the PDCCH, that is, determine the size of the entire PDCCH search space, initialize the entire PDCCH search space according to the number of CCEs, and calculate the range of aggregation levels for detection based on the number of CCEs.

[0097] Execute step S101, after obtaining the number of CCEs occupied by the PDCCH, initialize the entire PDCCH search space, and the initialization is carried out in units of CCEs; at the same time, calculate the range of the aggregation level to be detected in the blind detection process through the number of CCEs occupied by the PDCCH , that is, to limit the detected aggregation levels within a certain range according to this condition, thereby reducing subsequent processing on the number of agg...

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Abstract

The invention discloses a LTE PDCCH (Long Term Evolution System Physical Downlink Control Channel) blind inspection control method and device. According to the device, the PDCCH blind inspection times can be reduced by limiting polymerization grade ranges to be inspected in a certain range through a polymerization grade range calculation unit, a candidate PDCCH number calculation unit, an uplink / downlink scheduling state maintenance unit, a searching space state maintenance unit and a candidate PDCCH position calculation unit; and the repeated inspection of the same CCE (Control Channel Element) initial position in the same polymerization grade can be prevented by limiting the number of candidate PDCCH corresponding to each polymerization grade in a certain range; the inspected state of each CCE in a searching space is maintained to avoid the repeated inspection of CCE positions of detected DCI (Downlink Control Information) in different polymerization grades; and uplink / downlink scheduling states are maintained to reduce the inspection of uplink / downlink scheduling PDCCH number. By using all the units, the computation quantity and the searching time can be decreased; and the error inspection probability and the system power consumption can be reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, and more specifically, relates to a blind detection control method and device for an LTE (Long Term Evolution system, long term evolution system) PDCCH (physical downlink control channel, physical downlink control channel). Background technique [0002] During the current evolution from 3G to 4G, the LTE system is generally regarded as a 4G wireless communication system, which supports 1.4M to 20M system bandwidth, and the link transmission within the system bandwidth can support flexible physical resource configuration and support uplink and downlink HARQ (Hybrid Automatic Repeat Request, hybrid automatic repeat request) process, uplink power control process, and support 200 users online at the same time. The link transmission control corresponding to the above functions is mainly carried in different PDCCHs, that is, corresponding to different DCI formats (downlink control inform...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L27/00
Inventor 胡剑锋李亚辉张国松莫勇任江涛吴齐发唐相国
Owner 合肥东芯通信股份有限公司
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