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Method and device for judging error detection

A false detection and judgment technology, applied in the field of communication, can solve problems such as affecting downlink performance, and achieve the effect of improving performance and reducing the probability of false detection

Inactive Publication Date: 2011-09-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the related art that the increase of false detection events of PDCCH blind detection will affect the performance of the downlink, the present invention provides a false detection judgment method and device to solve at least one of the above problems

Method used

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  • Method and device for judging error detection

Examples

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example 1

[0053] For the false detection judgment of DCI2A, the flow chart of this example can be found in figure 2 , the specific decoding information misdetection judgment is as follows image 3 as shown, image 3 The TDD frame structure is shown. When the uplink and downlink ratio is 1, 15M system bandwidth, 4 antennas, two bit streams, and the DCI format type is DCI2A, blindly detect the bit stream passed by the CRC. The above-mentioned misdetection judgment method comprises the following steps:

[0054] Step 1 (equivalent to step S202): performing basic signal processing at the receiving end on the PDCCH channel at the UE side.

[0055] In a preferred implementation process, the control information of the LTE downlink physical layer is mapped in the first CFI OFDM symbols of each subframe, including control indication information (CFI), HARQ indication information (HI) and downlink control information (DCI). Therefore, before performing PDCCH detection on the UE side, the basic...

example 2

[0081] For the false detection judgment of DCI1A, the flow chart of this embodiment is as follows figure 2 As shown, the specific decoding information error detection judgment is as follows: image 3 shown, including the following steps:

[0082] Step 1 (equivalent to step S202): performing basic signal processing at the receiving end on the PDCCH channel at the UE side.

[0083] Similar to Example 1, before performing PDCCH blind detection on the UE side, the basic signal processing of the PDCCH channel needs to be completed, wherein the basic signal processing specifically includes deresource mapping, deprecoding, delayer mapping, demodulation and Descrambling.

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Abstract

The invention provides a method and a device for judging error detection. In the method, when the CRC passes during the blind detection process of PDCCH (physical downlink control channel), the DCI coding information and the DCI format type information corresponding to the DCI coding information are cached; the DCI coding information is judged according to an error detection judging rule corresponding to the DCI format type information; and whether the result of the PDCCH blind detection is correct or not can be determined. By adopting the technical scheme, the error detection possibility of DCI blind detection can be reduced effectively, and the performance of the downlink can be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for wrong detection and judgment. Background technique [0002] For a wireless communication system, a Physical Downlink Control Channel (PDCCH for short) is sent in a variety of downlink control information (Downlink Control Information, DCI for short) formats (DCI format), and is used to carry scheduling information and other control information , specifically including information such as transmission format, resource allocation, and uplink scheduling permission. [0003] False detection may occur in the blind detection of the PDCCH. Theoretical analysis: the false detection probability of the DCI is related to the bit length of a Cyclical Redundancy Check (CRC for short). The CRC of PDCCH is 16 bits, so the theoretical false detection probability is 1 / 2 16 . However, in an actual wireless environment, due to the influence of the transmission channel,...

Claims

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Application Information

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IPC IPC(8): H04W24/00
CPCH04L1/0061H04L1/0038H04L1/0025H04L1/1822H04L1/00H04W28/04H04L1/1864
Inventor 韩亚洁李斌
Owner ZTE CORP