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CN-122027087-A - Method, device, equipment, medium and product for detecting control format indication channel

CN122027087ACN 122027087 ACN122027087 ACN 122027087ACN-122027087-A

Abstract

The application relates to a method, a device, equipment, a medium and a product for detecting a control format indication channel. The method comprises the steps of obtaining CFI configuration parameters and signals of a current subframe, wherein the CFI configuration parameters comprise CFI values corresponding to a plurality of successfully decoded subframes in a first duration, carrying out CFICH detection on the signals of the current subframe, obtaining first CFI parameters and confidence indexes of the first CFI parameters, and determining detection results according to the CFI configuration parameters, the first CFI parameters and the confidence indexes. The technical scheme of the application can combine the historical CFI value configured by the base station with the confidence index of the current CFICH detection result to determine the detection result, thereby improving the accuracy of the CFICH detection result.

Inventors

  • WEI BO

Assignees

  • 芯翼信息科技(上海)有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (13)

  1. 1. The method for detecting the control format indication channel is applied to the electronic equipment and is characterized by comprising the following steps: acquiring CFI configuration parameters and signals of a current subframe, wherein the CFI configuration parameters comprise CFI values corresponding to a plurality of successfully decoded subframes in a first duration; CFICH detecting the signal of the current subframe to obtain a first CFI parameter and a confidence index of the first CFI parameter; And determining a detection result according to the CFI configuration parameter, the first CFI parameter and the confidence index.
  2. 2. The method for detecting a control format indicator channel according to claim 1, wherein the detecting CFICH the signal of the current subframe to obtain a first CFI parameter and a confidence indicator of the first CFI parameter includes: carrying out CFICH detection on the first OFDM symbol of the signal of the current subframe to obtain a CFICH symbol sequence; Calculating 3 metric values of the CFICH symbol sequences, which correspond to each of the local 3 CFI sequences respectively; And acquiring the first CFI parameter and a confidence index of the first CFI parameter according to the 3 measurement values, wherein the first CFI parameter is a CFI value corresponding to a measurement value meeting a first condition in the 3 measurement values, and the confidence index is used for representing the difference between the 3 measurement values.
  3. 3. The method according to claim 1, wherein determining the detection result according to the CFI configuration parameter, the first CFI parameter, and the confidence index comprises: and determining the detection result as the first CFI parameter corresponding to the confidence index being larger than a first threshold.
  4. 4. The method according to claim 1, wherein determining the detection result according to the CFI configuration parameter, the first CFI parameter, and the confidence index comprises: Corresponding to the confidence indicator being less than or equal to a first threshold and a second one of the CFI configuration parameters And determining that the detection result is the first CFI parameter, wherein the second CFI parameter is a CFI value with the largest occurrence probability in the CFI configuration parameters.
  5. 5. The method according to claim 1, wherein determining the detection result according to the CFI configuration parameter, the first CFI parameter, and the confidence index comprises: Corresponding to the confidence indicator being less than or equal to a first threshold and a second one of the CFI configuration parameters The probability of occurrence of the CFI parameter is larger than a second threshold, the second CFI parameter is equal to the first CFI parameter, the detection result is determined to be the first CFI parameter, and the second CFI parameter is a CFI value with the largest probability of occurrence in the CFI configuration parameters.
  6. 6. The method according to claim 1, wherein determining the detection result according to the CFI configuration parameter, the first CFI parameter, and the confidence index comprises: And determining that the detection result is the second CFI parameter according to the confidence index being smaller than or equal to a first threshold, wherein the occurrence probability of the second CFI parameter in the CFI configuration parameters is larger than a second threshold, the second CFI parameter is not equal to the first CFI parameter, and the second CFI parameter is a CFI value with the largest occurrence probability in the CFI configuration parameters.
  7. 7. The method for detecting a control format indicator channel according to claim 1, further comprising: And under the condition that the signal decoding of the current subframe is successful, updating the CFI configuration parameters according to the detection result.
  8. 8. The method according to claim 2, wherein the metric value includes a correlation value or a euclidean distance, and the first condition includes that the correlation value is maximum or the euclidean distance is minimum.
  9. 9. A detection device of control format indication channel is characterized in that the detection device of control format indication channel comprises an acquisition module, a calculation module and a determination module, The acquisition module is configured to acquire a CFI configuration parameter and a signal of a current subframe, wherein the CFI configuration parameter comprises CFI values corresponding to a plurality of successfully decoded subframes in a first duration; the computing module is configured to perform CFICH detection on the signal of the current subframe, and obtain a first CFI parameter and a confidence index of the first CFI parameter; The determining module is configured to determine a detection result according to the CFI configuration parameter, the first CFI parameter and the confidence index.
  10. 10. The apparatus for detecting a control format indicator channel according to claim 9, further comprising an update module, And the updating module is configured to update the CFI configuration parameters according to the detection result under the condition that the signal of the current subframe is successfully decoded.
  11. 11. An electronic device, comprising a memory and a processor, wherein the memory is configured to store a computer program executable by the processor, and the processor is configured to execute the computer program in the memory, so as to implement the method for detecting a control format indicator channel according to any one of claims 1 to 8.
  12. 12. A computer readable storage medium having stored thereon a computer program, wherein the computer program executable in the storage medium, when executed by a processor, is capable of implementing the method for detecting a control format indicator channel according to any of claims 1-8.
  13. 13. A computer program product comprising a computer program which, when executed by a processor, implements a method of detecting a control format indicator channel according to any one of claims 1 to 8.

Description

Method, device, equipment, medium and product for detecting control format indication channel Technical Field The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, a medium, and a product for detecting a control format indicator channel. Background In Long Term Evolution (LTE) systems, a physical control format indicator channel (Physical Control Format Indicator Channel, PCFICH) (also simply referred to as CFICH) is used to indicate the symbol length of a control region in a current subframe, i.e. the size of the control region is indicated by a control format indicator (Control Format Indicator, CFI) (typically 1,2 or 3). CFICH carry 3 bits of information, coded, scrambled, modulated and mapped to a first orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol. CFICH occupy 4 resource element groups (Resource Element Group, REGs) that are uniformly distributed over the entire system bandwidth over the frequency domain. At the receiving end, the UE (User Equipment) needs to decode CFICH correctly first to determine the search space of the physical downlink control channel (Physical Downlink Control Channel, PDCCH), and then decode the PDCCH to obtain the scheduling information of the physical downlink shared channel (Physical Downlink SHARED CHANNEL, PDSCH). In a conventional CFICH detection method, a correlation value calculation or an euclidean distance calculation is performed on CFICH symbols in a received signal and a known sequence corresponding to three local CFIs, and a measurement value is selected to be optimal, i.e. a CFI value corresponding to the highest correlation value or the lowest euclidean distance is selected as a detection result. However, since CFICH subcarriers are fewer in number, and in some cases, the conventional CFICH detection method is prone to false detection compared with the case of serious frequency interference or channel fading, so that the control region length is misjudged, once CFICH detection is wrong, the search space of the PDCCH is mispositioned, the PDCCH cannot be decoded correctly, and further the PDSCH cannot be detected, which may cause the loss of the data of the whole subframe and reduce the system performance. Disclosure of Invention The technical problem solved by the application is to provide a detection method, a device, equipment, a medium and a product for a control format indication channel, which can improve the accuracy of CFICH detection results. According to a first aspect of the embodiment of the application, a method for detecting a control format indication channel is provided, which comprises the steps of obtaining a CFI configuration parameter and signals of a current subframe, wherein the CFI configuration parameter comprises CFI values corresponding to a plurality of successfully decoded subframes in a first duration, carrying out CFICH detection on the signals of the current subframe, obtaining a first CFI parameter and a confidence index of the first CFI parameter, and determining a detection result according to the CFI configuration parameter, the first CFI parameter and the confidence index. In one embodiment, CFICH detection is performed on the signal of the current subframe to obtain a first CFI parameter and a confidence index of the first CFI parameter, which may include CFICH detection is performed on a first OFDM symbol of the signal of the current subframe to obtain CFICH symbol sequences, 3 metric values corresponding to each of the 3 local CFI sequences are calculated for CFICH symbol sequences, and the first CFI parameter and the confidence index of the first CFI parameter are obtained according to the 3 metric values, wherein the first CFI parameter is a CFI value corresponding to a metric value satisfying a first condition among the 3 metric values, and the confidence index is used for characterizing a difference between the 3 metric values. In one embodiment, determining the detection result based on the CFI configuration parameter, the first CFI parameter, and the confidence indicator may include determining the detection result to be the first CFI parameter corresponding to the confidence indicator being greater than a first threshold. In one embodiment, determining the detection result according to the CFI configuration parameter, the first CFI parameter and the confidence index may include determining the detection result as the first CFI parameter corresponding to the confidence index being less than or equal to a first threshold and the probability of occurrence of a second CFI parameter in the CFI configuration parameter being less than or equal to a second threshold, wherein the second CFI parameter is a CFI value with the greatest probability of occurrence in the CFI configuration parameter. In one embodiment, determining the detection result according to the CFI configuration parameter, the