Centralized enhanced physical downlink control channel (EPDCCH) blind detection method based on sorting of PRBs

A centralized, blind detection technology, applied in the direction of transmission modification based on link quality, devices dedicated to receivers, baseband systems, etc., can solve problems such as delay, reduce system delay, reduce the number of blind detections, The effect of improving the efficiency of blind detection

Active Publication Date: 2016-12-07
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0008] From the above analysis, it can be concluded that the traditional EPDCCH blind detection algorithm needs to go through all the candidate sets under the aggregation level one by one, that is, each blind detection has to go through a lot of repeated calculations, which will bring great delay to the entire system

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  • Centralized enhanced physical downlink control channel (EPDCCH) blind detection method based on sorting of PRBs
  • Centralized enhanced physical downlink control channel (EPDCCH) blind detection method based on sorting of PRBs
  • Centralized enhanced physical downlink control channel (EPDCCH) blind detection method based on sorting of PRBs

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[0027] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0028] EPDCCH and PDSCH are frequency division multiplexed to obtain beamforming and diversity gain. For the centralized EPDCCH, the cell can obtain real-time channel conditions, and then select PRBs with better frequency domain resources to allocate to the EPDCCH to send DCI information. According to different aggregation levels, DCI information of EPDCCH is mapped in one or more PRBs, and PRBs not mapped with EPDCCH data can be used to transmit PDSCH or EPDCCH data information of other UEs.

[0029] The EPDCCH-related DMRS will be mapped to the PRBs allocated by the upper layer to the EPDCCH, and the DMRS time-frequency resource mapping position is as follows: figure 1 a. figure 1 As shown in b, where...

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Abstract

The invention provides a centralized enhanced physical downlink control channel (EPDCCH) blind detection method based on the sorting of PRBs, which is used for improving the EPDCCH blind detection efficiency. The method comprises the following steps: analyzing an average DMRS estimated difference value of adjacent symbols of the same sub-carriers with the same antenna port numbers in each PRB allocated to an EPDCCH; carrying out the sorting of the PRBs allocated to the EPDCCH according to the difference values; selecting a first aggregation level value of a first blind detection; and determining a selection direction of a next aggregation level if the first blind detection is unsuccessful. The blind detection method provided by the invention has the advantages that the EPDCCH blind detection efficiency is effectively improved, and higher rapidity and effectiveness are achieved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication LTE-A, in particular to an EPDCCH (Enhanced Physical Downlink Control Channel, Enhanced Physical Downlink Control Channel) blind detection method under centralized conditions. Background technique [0002] In an LTE-A (Long Term Evolution-Advanced) system, downlink control information (DCI) is mainly used to carry downlink scheduling assignments, uplink scheduling requests, and power control commands. [0003] Compared with LTE, LTE-A introduces some new technologies. Due to the introduction of new technologies, the physical layer needs to allocate control signaling to them, so the original PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) is severely limited in capacity and becomes a significant bottleneck affecting system performance. Therefore, 3GPP introduced EPDCCH in Release 11. [0004] The EPDCCH and PDSCH (Physical Downlink Share Channel, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/02H04L5/00
CPCH04L1/0038H04L5/0048H04L25/0228
Inventor 王丹丁月友王华华刘宇陈发堂李小文
Owner CHONGQING UNIV OF POSTS & TELECOMM
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