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Method, equipment and system for indicating and detecting PDCCH in a carrier aggregation system

A technology of carrier aggregation and carrier, which is applied in the detection method, indication of physical downlink control channel, equipment and system fields, can solve the problems of increasing the number of blind detection times, increasing terminal detection cost and power consumption, etc., and achieve the effect of reducing the number of times

Inactive Publication Date: 2010-09-22
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0006] figure 1 The structure of the PDCCH shown has little change to the standard structure of LTE, and has good backward compatibility. However, when the terminal performs blind detection in the carrier aggregation system, the number of blind detections will increase with the number of carrier aggregation systems in the carrier aggregation system. increases linearly with the number of
If in the LTE specification, a terminal needs at most about 40 times of blind detection in a subframe to obtain the PDCCH belonging to the terminal, in a carrier aggregation system composed of N carriers, it needs at most N×40 times of blind detection to obtain For all PDCCHs belonging to the terminal, due to the large number of blind detections, the detection cost and power consumption of the terminal are increased

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  • Method, equipment and system for indicating and detecting PDCCH in a carrier aggregation system
  • Method, equipment and system for indicating and detecting PDCCH in a carrier aggregation system
  • Method, equipment and system for indicating and detecting PDCCH in a carrier aggregation system

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Embodiment Construction

[0037] In an aggregated carrier system, each carrier may have a PDCCH belonging to a certain terminal, or may not have a PDCCH belonging to the terminal. If the terminal wants to detect all the PDCCHs belonging to itself in the aggregated carrier system, each carrier must Perform a blind test. In order to reduce as much as possible the number of times of blind detection by the terminal in the carrier aggregation system, the present invention modifies the structure of the PDCCH on the base station side, and puts other PDCCHs belonging to the same terminal in some specific fields The location information of the carrier, so that after the terminal detects the PDCCH belonging to the terminal in a carrier, it can further determine other carriers that may have the PDCCH of the terminal according to the location information placed in the PDCCH. Therefore, the terminal can directly check the location information The corresponding carrier is detected to query its own PDCCH without blin...

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Abstract

The invention discloses a method for detecting PDCCH in a carrier aggregation system. The method comprises the following steps that: a terminal detects the PDCCH which belongs to the terminal from one carrier in the carrier aggregation system, then determines position information of the detected PDCCH, and finally detects the PDCCH which belongs to the terminal from the carrier which corresponds to the position information. Due to the adoption of the method, the terminal does not need to blindly detect each carrier, so the number of blind detection is reduced. The invention also discloses a method and equipment for indicating the physical downlink control channel (PDCCH) in the carrier aggregation system, and the equipment and the system for detecting the PDCCH.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for indicating and detecting a physical downlink control channel in a carrier system. Background technique [0002] With the development of communication systems, the requirements for the quantity and rate of data transmission are getting higher and higher. Therefore, based on the long term evolution standard (Long term evaluation, LTE), an evolved version of LTE, the LTE-A system, is proposed. The LTE-A system will support a larger bandwidth than the LTE system (the carrier bandwidth of the LTE system is 20MHz, and the bandwidth of the LTE-A system can reach 100MHz). In order to meet the bandwidth requirements of the LTE-A system, multiple LTE Carriers are aggregated together to form a carrier aggregation system to meet the bandwidth requirements of LTE-A. [0003] The data carried by the physical downlink control channel (Physical Downlink Control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/12H04W48/16H04W72/14
Inventor 雷蕾王军徐晓东胡南
Owner CHINA MOBILE COMM GRP CO LTD
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