Blind detection method of physical downlink control channel

A technology of physical downlink control and blind detection, which is applied in the field of communication, can solve the problems of low efficiency of blind detection, achieve the effects of reduced number of times, simple algorithm implementation, and improved efficiency

Active Publication Date: 2018-11-27
TRANSCOM INSTR
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and to provide a physical downlink control channel blind detection method that can solve the problem of low blind detection efficiency in the case of unknown RNTI in the existing PDCCH blind detection

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  • Blind detection method of physical downlink control channel
  • Blind detection method of physical downlink control channel
  • Blind detection method of physical downlink control channel

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Embodiment Construction

[0054] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0055] see figure 1 As shown, the physical downlink control channel blind detection method of the present invention comprises the following steps:

[0056] (1) Obtain the effective CCE position and the size of the effective CCE of the data in the physical downlink control channel;

[0057] (2) According to the initial position N of the CCE in the search space CCEstart Determine a set of wireless network temporary identifiers RNTI;

[0058] (3) Performing a CRC check on the RNTI set to obtain a valid value of the RNTI.

[0059] In a preferred embodiment, see figure 2 As shown, described step (1) specifically comprises the following steps:

[0060] (1.1) De-resource mapping, de-layer mapping, de-interleaving, demodulation, and descrambling processing are performed on the acquired data in the physical down...

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Abstract

The invention relates to a physical downlink control channel (PDCCH) blind detection method. The method comprises the following steps: 1, obtaining the position and size of a valid control channel element (CCE) of data in a PDCCH; 2, according to the initial position NCCEstart of the CCE in a search space, determining a set of radio network temporary identity (RNTI); and 3, performing cyclic redundancy check (CRC) on the set of the RNTI so as to obtain the value of a valid RNTI. By using the PDCCH blind detection method of such a structure, channel equalization, demodulation and descrambling processing are only performed once, realization of an algorithm is simple, the frequency of resolving rate coupling and convolution decoding are effectively reduced, the blind detection efficiency is enhanced, a candidate RNTI set is determined according to the initial position of the CCE in the search space, it is ensured that CRC processing is only performed on a possible RNTI value, and the blind detection efficiency is further improved.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to blind detection, in particular to a method for blind detection of a physical downlink control channel. Background technique [0002] In the LTE (Long Term Evolution) system, PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) carries downlink control information (DCI, downlink control information), such as uplink scheduling instructions, downlink data transmission instructions, public control information, etc., its Correct demodulation and decoding are the prerequisites for correct reception of service data. The design of the PDCCH adopts the way that multiple users share resources, and the terminal needs to search for control signaling in the entire control area according to certain rules. In a downlink subframe, multiple DCIs perform coding and rate matching processes, multiplex coded bits, and jointly perform operations such as scramblin...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0038
Inventor 曹慧陈丽徐旭东
Owner TRANSCOM INSTR
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