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Blind detection method

A blind detection and measurement result technology, applied in the field of blind detection, can solve the problems of unfavorable UE power saving, high complexity, large processing capacity, etc., and achieve the effect of reducing the number of attempts, reducing power consumption, and improving system performance

Active Publication Date: 2012-12-19
北京万海云科技有限公司
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Problems solved by technology

[0017] It can be seen from the above process that the existing blind detection method needs to be tried continuously, especially in the extreme case, it is necessary to try all the CCE numbers and PDCCH DCI formats. The duration and disadvantages of UE power saving and other issues

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Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] The core idea of ​​the present invention is: use the transmission mode and historical scheduling information configured by the network to the UE to determine the PDCCH DCI format blind detection candidate set, and use the channel SINR / SNR measurement and channel changes during two adjacent scheduling to preliminarily determine the bearer PDCCH In this way, the number of UE PDCCH blind detection attempts can be greatly reduced, the calculation amount and processing complexity of the UE can be reduced, the power consumption of the UE can be reduced, and the system performance can be improved.

[0036] image 3 It is a schematic flow chart of Embodiment 1 of the present invention. This embodiment provides that when the UE's last two e...

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Abstract

A blind detection method is provided by the present invention. The method determines a candidate set of physical downlink control channel (PDCCH) downlink control information (DCI) formats adopted by the blind detection by using a transmission mode allocated to a user equipment (UE) by a network and history scheduling information, and initially determines the number of control channel element (CCE) resources carrying PDCCH by using a measurement result of a channel signal-to-noise ratio and a channel change of two consecutive scheduling processes, thus effectively reducing attempt times of the UE PDCCH blind detection. The present invention enables reducing computing amount and processing complexity of the UE, and reduces UE power consumption and improves system performance.

Description

technical field [0001] The invention relates to a blind detection technology in a mobile communication system, in particular to a blind detection method in a long-term evolution (LTE) system. Background technique [0002] The LTE system is a broadband mobile communication system. The uplink adopts single-carrier frequency division multiple access (SC-FDMA) technology, and the downlink adopts orthogonal frequency division multiple access (OFDM) technology. The supported system bandwidth includes 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz. In LTE and subsequent LTE+ systems, in order to maximize the use of resources and improve system throughput, all physical resources in the cell are shared, and are uniformly scheduled and allocated to UEs in the cell by the network side. [0003] In the LTE system, uplink and downlink resource scheduling is performed through a physical downlink control channel (PDCCH). For downlink resource allocation, the network side first transmits the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/00H04L1/00H04L25/02
CPCH04L1/0045Y02B60/50H04W72/1289Y02D30/70H04W72/23
Inventor 吴松陈永倩
Owner 北京万海云科技有限公司
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