WO2016197472A1 - 一种增强型物理下行控制信道处理方法、装置及存储介质 - Google Patents

一种增强型物理下行控制信道处理方法、装置及存储介质 Download PDF

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WO2016197472A1
WO2016197472A1 PCT/CN2015/089519 CN2015089519W WO2016197472A1 WO 2016197472 A1 WO2016197472 A1 WO 2016197472A1 CN 2015089519 W CN2015089519 W CN 2015089519W WO 2016197472 A1 WO2016197472 A1 WO 2016197472A1
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control code
candidate control
epdcch
determining
candidate
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French (fr)
Inventor
周阳
戴笠
邓春华
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Sanechips Technology Co Ltd
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Sanechips Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0067—Rate matching
    • H04L1/0068—Rate matching by puncturing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data

Definitions

  • the present invention relates to a related art of an enhanced physical downlink control channel (ePDCCH) processing in the field of mobile communications, and in particular, to an ePDCCH processing method, apparatus, and storage medium.
  • ePDCCH enhanced physical downlink control channel
  • an ePDCCH channel is proposed in R11.
  • the ePDCCH occupies a part of the resources of the Physical Downlink Shared Channel (PDSCH), and the ePDCCH and the PDSCH work in a frequency division multiplexing manner.
  • PDSCH Physical Downlink Shared Channel
  • the terminal involves blind detection processing in the process of processing the ePDCCH.
  • the complexity of the subsequent blind detection processing is complicated. It is high and inconvenient to implement; it involves the Cyclic Redundancy Check (CRC) process during the blind detection process.
  • CRC Cyclic Redundancy Check
  • the CRC check itself has the possibility of error.
  • providing an ePDCCH processing scheme can not only facilitate the blind detection processing in the ePDCCH processing, but also effectively reduce the probability of false detection and repeated detection, which has become an urgent problem to be solved.
  • the embodiment of the present invention is to provide an ePDCCH processing method and apparatus, which can not only facilitate the blind detection processing in the ePDCCH processing, but also effectively reduce the probability of false detection and repeated detection.
  • An embodiment of the present invention provides an ePDCCH processing method, where the method includes:
  • the determining the RE corresponding to the candidate control code of the ePDCCH bearer includes:
  • performing de-rate matching on the descrambled candidate control code includes:
  • Determining a codeword length M of the descrambled candidate control code If the N times of the codeword length is less than the data amount of the candidate control code channel, the descrambled candidate control code is performed. The rate matching matching processing is performed; if the value of the N*M is greater than or equal to the data amount of the candidate control code channel, the descrambling candidate control code is subjected to de-rate matching and puncturing transparent transmission processing; N is a positive number.
  • the method further includes:
  • the candidate control code data after performing rate dematching is stored, and the amount of data carried by the candidate control code channel is recorded.
  • the method before the de-interleaving and the blind detection processing are performed on the candidate rate control code after the de-rate matching, the method further includes:
  • the candidate control code after performing the de-rate matching puncturing and transparent transmission is punctured and zero-padded.
  • the determining, by the preset decision policy, the validity of the candidate control code that is correctly verified in the blind detection includes:
  • the aggregation degree level of the same candidate control code is further acquired;
  • the candidate control code having a large convolutional decoding output threshold is determined. More effective;
  • the same candidate control code is discarded;
  • the current candidate control code is discarded;
  • the aggregation degree level of the same candidate control code is AL>1, and the degree of aggregation of the current candidate control code is AL>1, it is determined that the candidate control code having a large convolutional decoding output threshold is more effective. .
  • An embodiment of the present invention further provides an ePDCCH processing device, where the device is located at a terminal, where the device includes: a determining module, a first processing module, a second processing module, and a validity determining module;
  • the determining module is configured to determine an RE corresponding to the candidate control code of the ePDCCH bearer
  • the first processing module is configured to descramble the RE corresponding to the candidate control code, and perform de-rate matching on the descrambled candidate control code;
  • the second processing module is configured to perform deinterleaving and blind detection processing on the candidate rate control code after the de-rate matching
  • the validity decision module is configured to perform validity determination on the correct candidate control code in the blind detection according to a preset decision policy.
  • the determining module is configured to determine an antenna port corresponding to the candidate control code of the ePDCCH, and map the candidate control code to the RE of the corresponding antenna port time-frequency resource in the order of the pre-frequency domain and the time domain. Determining an RE corresponding to the candidate control code.
  • the first processing module is configured to determine a codeword length M of the descrambled candidate control code, if the N times of the codeword length is smaller than the data amount of the candidate control code channel.
  • the size of the candidate control code is subjected to de-rate matching combining processing; if the value of the N*M is greater than or equal to the amount of data carried by the candidate control code channel, the candidate control after descrambling
  • the code performs a rate-matching puncturing and transparent transmission process; wherein N is a positive number.
  • the device further includes a storage module configured to store candidate control code data after performing rate dematching, and record data amount carried by the candidate control code channel.
  • the second processing module is further configured to: when determining that the value of the N*M is greater than the amount of data carried by the candidate control code channel, candidate control after performing de-rate matching and puncturing transparent transmission The code is punched and zero-filled.
  • the validity determining module is configured to determine a starting position of a search space of a candidate control code that is correctly verified in the currently obtained blind detection, and a check in the blind detection that has been acquired. Whether the starting position of the correct candidate control code search space is the same. If the starting position of the search space of the current candidate control code is different from the starting position of the search space of other candidate control codes, it is determined that the current candidate control code is valid.
  • the aggregation degree level of the same candidate control code is further acquired;
  • the same candidate control code is discarded;
  • the current candidate control code is discarded;
  • the aggregation degree level of the same candidate control code is AL>1, and the degree of aggregation of the current candidate control code is AL>1, it is determined that the candidate control code having a large convolutional decoding output threshold is more effective. .
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program, and the computer program is used to execute the foregoing ePDCCH processing method in the embodiment of the present invention.
  • the terminal determines the RE corresponding to the candidate control code of the ePDCCH bearer, descrambles the RE corresponding to the candidate control code, and performs the descrambled candidate control code De-rate matching is performed; de-interleaving and blind detection processing are performed on the candidate control codes after the de-rate matching; and the validity of the candidate control codes in the blind detection is determined according to a preset decision policy.
  • the blind detection processing in the ePDCCH processing can be facilitated, and the probability of false detection and repeated detection can be effectively reduced, and is applicable to Wave aggregation technology saves ePDCCH processing time and physical resources.
  • 1 is a schematic diagram of a structure of a transmission resource divided according to a time domain and a frequency domain;
  • FIG. 3 is a schematic flowchart of an ePDCCH processing method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for processing an ePDCCH according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of an ePDCCH processing apparatus according to an embodiment of the present invention.
  • the maximum time unit is a 10 ms radio frame, which is divided into 10 1 ms subframes, and each subframe is divided into two 0.5.
  • the time slot of ms.
  • each slot consists of 7 OFDM symbols
  • each slot consists of 6 OFDM symbols.
  • every 12 subcarriers constitute one unit resource (using a total of 180 kHz bandwidth). Therefore, one unit resource in the frequency domain and one slot resource in the time domain form a resource block (RB, Resource Block), such as Figure 1, where 11 is a resource block (RB), Resource elements (RE); 12 is the resource element RE(k, l).
  • the location of the physical resource block-pair (PRB-pair, physical resource block-pair) occupied by the ePDCCH is indicated by the RRC (Radio Resource Control).
  • RRC Radio Resource Control
  • Each user terminal UE, User Equipment
  • an enhanced RE group eREG
  • an enhanced control channel element eCCE
  • one eCCE includes 4 Or 8 eREGs.
  • a PRB-pair is fixedly containing 16 eREGs (number: 0 to 15); in each PRB-pair, the first frequency domain is followed by the time domain for all REs (excluding the demodulation reference signal DMRS, as shown in Figure 2)
  • the RE is sequentially numbered from 0 to 15 as shown in FIG.
  • one eREG is composed of all REs having the same number (excluding the Legacy downlink control region, the cell reference signal Cell-RS, and the channel state information reference signal CSI-
  • the RE occupied by the RS) indicates the RE occupied by the CSI-RS, the area filled with the oblique line indicates the RE occupied by the Cell-RS, and the area filled with the horizontal line indicates the occupied by the PCFICH/PHICH/PDCCH.
  • RE the area filled by the shadow indicates the RE occupied by the ePDCCH; this mapping method uniformly distributes the RE resources in one eREG over the entire PRB-pair, and balances the reception performance of all eREGs.
  • the ePDCCH supports two types of resource allocation, that is, there are two types of ePDCCH transmission modes: localized ePDCCH transmission and distributed ePDCCH transmission, and specific transmission mode is adopted by the base station according to the communication link situation.
  • the signal is transmitted to the terminal in the cell by the present invention; wherein the centralized ePDCCH transmission can effectively improve the spectrum efficiency, and the general application is when the base station can obtain reliable channel state information, and the distributed ePDCCH transmission is generally applied to the base station.
  • the robustness of the ePDCCH can be enhanced in the case of relying on channel state information;
  • the ePDCCH set X m , m 1 or 2
  • the eCCE index that can be used for ePDCCH transmission is N ECCE, m, i -1
  • the eREG number corresponding to eCCEn is as follows:
  • PRB-pair index is
  • PRB-pair index is
  • the number of eREGs included in an eCCE The number of eCCEs included in a PRB-pair.
  • the terminal determines the RE corresponding to the candidate control code of the ePDCCH, performs descrambling on the RE corresponding to the candidate control code, and performs de-rate matching on the descrambled candidate control code;
  • the candidate control code is subjected to deinterleaving and blind detection processing; and the validity of the correct candidate control code in the blind detection is determined according to a preset decision strategy.
  • FIG. 3 is a schematic flowchart of a method for processing an ePDCCH according to an embodiment of the present invention. As shown in FIG. 3, an ePDCCH processing method according to an embodiment of the present invention includes:
  • Step 301 The terminal determines an RE corresponding to the candidate control code of the ePDCCH bearer.
  • the types of the candidate control codes include three types: TYPE_A, TYPE_B, and TYPE_C;
  • TYPE_A type candidate control code includes Downlink Control Information (DCI) format 1/DCI format 1B/DCI format 1D/DCI format 2/DCI format 2A/DCI format 2B/DCI format 2C/DCI format 2D;
  • DCI Downlink Control Information
  • the candidate control code of type TYPE_B includes DCI format 0/DCI format 1A;
  • the candidate control code of type TYPE_C contains DCI format 4.
  • the antenna port corresponding to the candidate control code for determining the ePDCCH bearer includes:
  • the antenna port p corresponding to a candidate control code is determined by:
  • n ECCE, low is the minimum index value of the eCCE used by the candidate control code in the ePDCCH set
  • n RNTI is the RNTI value of the candidate control code.
  • Table 2 the antenna port corresponding to the candidate control code in different scenarios is transmitted for the centralized ePDCCH. When the value of n' is determined, the antenna port corresponding to the candidate control code is obtained.
  • Table 3 shows the number of eCCEs used by the corresponding ePDCCH channel in different ePDCCH formats, that is,
  • the antenna port p ⁇ 107, 109 ⁇ corresponding to the candidate control code
  • the antenna port corresponding to the candidate control code is p ⁇ 107,108 ⁇ .
  • the location (k, l) of the RE is the location of the eREG corresponding to the candidate control code. And the location (k, l) of the RE is not occupied by a cell reference signal (Cell-RS, Cell-Reference Signal) and a channel state information reference signal (CSI-RS, Channel State Information-Reference Signal), and the RE
  • Cell-RS Cell-Reference Signal
  • CSI-RS Channel State Information-Reference Signal
  • the number of the PRB-pair where the RE is located ereg_i is the eREG number where the RE is located, and n is the eCCE number of the RE.
  • the time-frequency of the candidate control code is obtained in the case of centralized ePDCCH transmission.
  • the RE(k, l) of the resource separates the data resources belonging to different candidate control codes to implement demapping of the candidate control code resources.
  • the time-frequency of the candidate and the control code can be obtained in the case of distributed ePDCCH transmission.
  • the RE(k, l) of the resource separates the data resources belonging to different candidate control codes to implement demapping of the candidate control code resources. In this way, the blind detection processing in the subsequent ePDCCH processing is facilitated.
  • the candidate control code of the ePDCCH may be one or more.
  • the resource element RE corresponding to all candidate control codes carried by the ePDCCH is determined.
  • the ePDCCH processing method in the embodiment of the present invention is applicable to a carrier aggregation technology.
  • ePDCCH bearer downlink resource allocation for the component carrier and an uplink resource grant for the corresponding uplink component carrier on each downlink component carrier which is called carrier aggregation independent carrier scheduling;
  • Carrier aggregation cross-carrier scheduling that is, one component carrier
  • the ePDCCH on the wave can schedule resource allocation and data transmission on another component carrier.
  • Step 302 Perform descrambling on the RE corresponding to the candidate control code, and perform de-rate matching on the descrambled candidate control code.
  • the descrambling the RE corresponding to the candidate control code includes:
  • the descrambling code sequence c(n) of the ePDCCH is:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n)) mod2;
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n)) mod2;
  • the scrambling codes of the respective sets are generated in parallel for the two sets, and the descrambling of the REs corresponding to the candidate control codes is performed on the descrambling of all candidate control codes carried by the ePDCCH, that is, the subordinates
  • the REs of different ePDCCH sets and belonging to different candidate control codes are descrambled.
  • performing rate de-matching on the descrambled candidate control code includes:
  • a codeword length M of the descrambled candidate control code If the N times of the codeword length is less than the data amount of the candidate control code channel, the descrambled candidate control code is performed. The rate matching matching processing is performed; if the value of the N*M is greater than or equal to the data amount of the candidate control code channel, the descrambling candidate control code is subjected to de-rate matching and puncturing transparent transmission processing; M is a positive number; the N is a positive number, and the value of N can be set according to actual needs. In an embodiment, the N is 3.
  • determining the codeword length M of the descrambled candidate control code includes: determining a codeword length M of the descrambled candidate control code according to system parameters such as an LTE system bandwidth and a carrier aggregation type.
  • the method further includes: storing the candidate control code data after the de-rate matching, and recording the data amount carried by the candidate control code channel; specifically, storing the data to the random access memory ( Random Access Memory);
  • the storage is performed after performing the rate matching and combining, which can save physical storage resources.
  • Step 303 Perform deinterleaving and blind detection processing on the candidate rate control code after the de-rate matching.
  • the method further includes:
  • the candidate control code after performing the de-rate matching puncturing and transparent transmission is punctured and zero-padded; that is, when determining When the value of the N*M is greater than the amount of data carried by the candidate control code channel, it may be known that the stored candidate control code data after the de-rate matching is determined by the de-rate matched punctured transparent control code data.
  • the punctured zero padding process needs to be performed, and the number of zero padding is determined according to the recorded data amount of the candidate control code channel and the codeword length of the candidate control code;
  • Performing the puncturing zero-padding process on the candidate control code after performing the de-rate matching puncturing and transparent transmission comprises: performing puncturing and zero-padding processing on each candidate control code after performing the de-rate matching puncturing and transparent transmission, that is, Each candidate control code is serially processed.
  • the deinterleaving the demodulation matched candidate control codes includes:
  • the candidate control codes after the solution rate matching are written in the order of the first column and then the row, and then according to the column.
  • the replacement rule performs column permutation, and then reads out in the order of re-column, completes the de-interleaving process, and implements data rearrangement after de-rate matching, to complete the process of transmitting data in the order sent by the base station for blind detection;
  • the column permutation is mainly implemented according to a deinterleaving matrix, the matrix comprising a fixed 32 columns, and the number of rows of the matrix is determined by the codeword length of the candidate control code.
  • performing blind detection processing on the deinterleaved candidate control code includes:
  • the ePDCCH resource mapping is in units of eCCE.
  • the base station may choose to use the degree of aggregation L ⁇ 1, 2, 4, 8, 16, 32 ⁇ to carry a candidate control code, which is called an eCCE aggregation level (AL, Aggregation Level), the channel state is good (bad), the lower (higher) eCCE aggregation level can be selected; the terminal needs to search for the starting position of the eCCE where the candidate control code is located in the ePDCCH resource region, and also needs to search for the base station to send the candidate control code.
  • the degree of polymerization used, the starting position to the end of the degree of polymerization is called the candidate control code. Search space
  • the determining a search space of the deinterleaved candidate control code includes:
  • n CI is a carrier indicator field (CIF) of the serving cell, ie Serving cell index;
  • the number of candidate control codes on the serving cell ePDCCH set p the degree of aggregation level L, L ⁇ ⁇ 1, 2, 4, 8, 16, 32 ⁇ ;
  • N ECCE,p,k is the downlink subframe k, the total number of eCCEs in the ePDCCH set p;
  • the Y p,k is a pseudo-random parameter, so that the eCCE starting position of the candidate control code can be changed according to the subframe number and the terminal ID, so that the candidate control code between multiple terminals in one downlink subframe can be avoided.
  • the possibility of a conflict is a pseudo-random parameter, so that the eCCE starting position of the candidate control code can be changed according to the subframe number and the terminal ID, so that the candidate control code between multiple terminals in one downlink subframe can be avoided.
  • the de-interleaving and the blind detection processing of the de-rate matched candidate control code are serial processing of the candidate control code after the de-rate matching.
  • the detection process that is, the serial processing of the candidate control code after the de-rate matching; in the carrier aggregation cross-carrier scheduling scenario, the candidate control codes of the multiple serving cells are blindly detected in parallel, which saves the ePDCCH processing time; The blind detection of candidate control codes on each component carrier is serially processed, saving physical area.
  • Step 304 Verify correct candidate control code in the blind detection according to a preset decision policy. Conduct a validity judgment;
  • the step includes: determining whether the starting position of the search space of the correct candidate control code in the currently obtained blind detection is the same as the starting position of the other candidate control code search space in the blind detection that has been acquired, if If the starting position of the search space of the current candidate control code is different from the starting position of the search space of the other candidate control codes, it is determined that the current candidate control code is a valid candidate control code;
  • the aggregation degree level of the same candidate control code is further acquired
  • the same candidate control code is discarded;
  • the current candidate control code is discarded;
  • the aggregation degree level of the same candidate control code is AL>1, and the degree of aggregation of the current candidate control code is AL>1, it is determined that the candidate control code having a large convolutional decoding output threshold is more effective. .
  • the validity decision of the candidate control code for verifying the correctness in the blind detection is a validity decision for the candidate control code of the same DCI type.
  • the ePDCCH processing method in the embodiment of the present invention includes:
  • Step 401 The terminal determines an RE corresponding to the candidate control code carried on the component carrier a.
  • the antenna port corresponding to the candidate control code for determining the ePDCCH bearer on the component carrier a includes: for centralized ePDCCH transmission,
  • n ECCE,low is the minimum index value of the eCCE used by the candidate control code in the ePDCCH set
  • n RNTI is the RNTI value of the candidate control code.
  • the corresponding relationship between the n's and the antenna ports corresponding to the candidate control codes in different scenarios is as shown in Table 2;
  • the antenna port p ⁇ 107, 109 ⁇ corresponding to the candidate control code
  • the antenna port corresponding to the candidate control code is p ⁇ 107,108 ⁇ .
  • mapping the candidate control code to a corresponding antenna port time-frequency resource When the RE is on, the location (k, l) of the RE is the location of the eREG corresponding to the candidate control code, and the location (k, l) of the RE is not occupied by the Cell-RS and the CSI-RS. And the location (k, l) of the RE is located in the ePDCCH starting OFDM symbol or the OFDM symbol after the subframe, and is located before the next subframe.
  • the step is to determine the RE corresponding to all candidate control codes carried by the ePDCCH.
  • Step 402 Perform descrambling on the RE corresponding to the candidate control code, and perform de-rate matching on the descrambled candidate control code.
  • the descrambling the RE corresponding to the candidate control code includes:
  • the descrambling code sequence c(n) of the ePDCCH is:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n)) mod2;
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n)) mod2;
  • De-rate matching the descrambled candidate control code includes:
  • a codeword length M of the descrambled candidate control code Determining a codeword length M of the descrambled candidate control code. If the N times of the codeword length is less than the data amount of the candidate control code channel, the descrambled candidate control code is performed. The rate matching matching processing is performed; if the value of the N*M is greater than or equal to the data amount of the candidate control code channel, the descrambling candidate control code is subjected to de-rate matching and puncturing transparent transmission processing;
  • the N is a positive number, which can be set according to actual needs. In an embodiment, the N is 3;
  • determining the codeword length M of the descrambled candidate control code includes: determining a codeword length M of the descrambled candidate control code according to system parameters such as an LTE system bandwidth and a carrier aggregation type.
  • Step 403 Store candidate control code data after de-rate matching, and record data amount carried by the candidate control code channel;
  • the storage of the matched candidate control code data is performed when the de-rate matching is performed in the de-rate matching process of the descrambled candidate control code, and the storage is performed after the solution rate matching is performed, thereby saving the physical Storage resources.
  • Step 404 Determine whether the value of N times the codeword length M of the candidate control code after descrambling is greater than the size of the data amount carried by the candidate control code channel, if yes, perform step 405; otherwise, perform step 406;
  • Step 405 performing a puncturing zero-padding process on the candidate control code after performing the de-rate matching puncturing and transparent transmission, and then performing step 406;
  • the step includes: performing a puncturing zero-padding process on each candidate control code after performing the rate-matching puncturing and transparent transmission, that is, performing serial processing on each candidate control code; the number of the zero-padding is based on the recorded location The amount of data carried by the candidate control code channel and the codeword length of the candidate control code are determined.
  • Step 406 Perform deinterleaving and blind detection processing on the candidate control code.
  • the deinterleaving the candidate control code includes: writing the candidate control codes in the order of the first column and the subsequent row, and then performing column permutation according to the column replacement rule, and then reading out in the order of the preceding re-column to complete the de-interleaving process.
  • Performing blind detection processing on the deinterleaved candidate control code includes:
  • Determining a search space of the deinterleaved candidate control code and performing deconvolution decoding, RNTI value demasking, and CRC check processing on the deinterleaved candidate control code in the search space.
  • the de-interleaving and blind detection process of a candidate control code is carried out, that is, the serial processing of the candidate control code after the de-rate matching; in the carrier aggregation cross-carrier scheduling scenario, the candidate control codes of multiple serving cells are blindly detected in parallel
  • the ePDCCH processing time is saved; and the blind detection of the candidate control codes subordinate to each component carrier is serially processed, saving physical area.
  • Step 407 Perform validity determination on the correct candidate control code in the blind detection according to a preset decision policy.
  • the step includes: determining whether the starting position of the search space of the correct candidate control code in the currently obtained blind detection is the same as the starting position of the other candidate control code search space in the blind detection that has been acquired, if If the starting position of the search space of the current candidate control code is different from the starting position of the search space of the other candidate control codes, it is determined that the current candidate control code is a valid candidate control code;
  • the aggregation degree level of the same candidate control code is further acquired
  • the same candidate control code is discarded;
  • the current candidate control code is discarded;
  • the aggregation degree level of the same candidate control code is AL>1, and the degree of aggregation of the current candidate control code is AL>1, it is determined that the candidate control code having a large convolutional decoding output threshold is more effective. .
  • the candidate control code that is correctly verified in the blind detection is valid.
  • the decision is a validity decision for the candidate control code of the same DCI type.
  • Step 408 End the current processing flow.
  • FIG. 5 is a schematic structural diagram of an ePDCCH processing apparatus according to an embodiment of the present invention; the apparatus is applied to a terminal, as shown in FIG. 5, the ePDCCH processing apparatus of the embodiment of the present invention comprises: a determining module 51, a first processing module 52, and a second processing. Module 53 and validity decision module 54; wherein
  • the determining module 51 is configured to determine an RE corresponding to the candidate control code of the ePDCCH bearer
  • the first processing module 52 is configured to descramble the RE corresponding to the candidate control code, and perform de-rate matching on the descrambled candidate control code;
  • the second processing module 53 is configured to perform deinterleaving and blind detection processing on the candidate rate control code after the de-rate matching;
  • the validity decision module 54 is configured to perform validity determination on the correct candidate control code in the blind detection according to a preset decision policy.
  • the determining module 51 is configured to determine an antenna port corresponding to the candidate control code of the ePDCCH, and map the candidate control code to the corresponding antenna port time-frequency resource according to the order of the pre-frequency domain and the time domain. Determine the RE corresponding to the candidate control code on the RE;
  • the determining, by the determining module 51, the antenna port corresponding to the candidate control code of the ePDCCH bearer includes:
  • the determining module 51 is based on Determining the value of n'; wherein n ECCE,low is the minimum index value of the eCCE used by the candidate control code in the ePDCCH set, and the n RNTI is the RNTI value of the candidate control code.
  • the corresponding relationship between the n's and the antenna ports corresponding to the candidate control codes in different scenarios is as shown in Table 2;
  • the time domain starting from the antenna port 107, when the system is configured in the regular cyclic prefix, the antenna port p ⁇ 107, 109 ⁇ corresponding to the candidate control code; when the system is configured to extend the cyclic prefix, the candidate control code corresponds to Antenna port p ⁇ 107,108 ⁇ .
  • the determining module 51 maps the candidate control code to the RE of the corresponding antenna port time-frequency resource in the order of the pre-frequency domain and the time domain, the location of the RE (k, l) a location where the eREG corresponding to the candidate control code is located, and the location (k, l) of the RE is not occupied by the Cell-RS and the CSI-RS, and the location (k, l) of the RE is located in the sub-
  • the intra ePDCCH starts the OFDM symbol or the OFDM symbol after it and is located before the next subframe.
  • the determining module 51 is based on Determining an eCCE number n where the RE corresponding to the candidate control code is located; wherein The number of the PRB-pair where the RE is located, and ereg_i is the eREG number where the RE is located.
  • the first processing module 52 is configured to descramble the RE corresponding to the candidate control code according to the descrambling code sequence c(n) of the ePDCCH;
  • the descrambling code sequence c(n) of the ePDCCH is:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n)) mod2;
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n)) mod2;
  • the first processing module 52 is configured to determine a codeword length M of the descrambled candidate control code, if the N times of the codeword length is less than the candidate control code channel bearer.
  • the size of the data volume is subjected to de-rate matching combining processing on the descrambled candidate control code; if the value of the N*M is greater than or equal to the amount of data carried by the candidate control code channel, then after descrambling
  • the candidate control code performs de-rate matching puncturing and transparent transmission processing; wherein N is a positive number, in an embodiment, the N is 3;
  • the first processing module 52 is based on a system such as an LTE system bandwidth, a carrier aggregation type, and the like.
  • the parameter determines the codeword length M of the descrambled candidate control code.
  • the apparatus further includes a storage module 55 configured to store candidate control code data subjected to de-rate matching, and record the amount of data carried by the candidate control code channel.
  • the second processing module 53 is further configured to: after determining that the value of the N*M is greater than the amount of data carried by the candidate control code channel, performing de-rate matching and punching through the transparent transmission The candidate control code performs punching and zeroing processing.
  • the second processing module 53 is configured to determine a search space of the deinterleaved candidate control code, and perform convolution decoding on the deinterleaved candidate control code in the search space.
  • the RNTI value is demasked and CRC checked.
  • the validity determining module 54 is configured to determine a starting position of a search space in which a correct candidate control code is verified in the currently obtained blind detection, and other candidates that have been correctly verified in the blind detection that have been acquired. Whether the starting position of the search space of the control code is the same, if the starting position of the search space of the current candidate control code is different from the starting position of the search space of the other candidate control codes, determining that the current candidate control code is a valid candidate control code;
  • the aggregation degree level of the same candidate control code is further acquired;
  • the same candidate control code is discarded;
  • the current candidate control code is discarded;
  • the aggregation degree of the same candidate control code is AL>1, and the current candidate control code is aggregated
  • the joint level AL>1 determines that the candidate control code with a large convolutional decoding output threshold is more effective.
  • the determining module, the first processing module, the second processing module, and the validity determining module proposed in the embodiments of the present invention may be implemented by a processor, and may also be implemented by a specific logic circuit; in practical applications, processing
  • the device can be a central processing unit (CPU), a microprocessor (MPU) or a field programmable gate array (FPGA), etc.; the storage module can be implemented by a memory.
  • the ePDCCH processing method may also be stored in a computer readable storage medium.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • program codes such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • the embodiment of the present invention further provides a computer storage medium, where the computer program is stored with a computer program, and the computer program is used to execute the ePDCCH processing method of the embodiment of the present invention.

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Abstract

本发明公开了一种增强型物理下行控制信道(ePDCCH)处理方法，终端确定ePDCCH承载的候选控制码对应的资源元素(RE)；对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；对解速率匹配后的候选控制码进行解交织、盲检测处理；依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。本发明还公开了一种ePDCCH处理装置及存储介质。

Description

一种增强型物理下行控制信道处理方法、装置及存储介质 技术领域
本发明涉及移动通信领域中增强型物理下行控制信道(enhanced Physical Downlink Control Channel，ePDCCH)处理的相关技术，尤其涉及一种ePDCCH处理方法、装置及存储介质。
背景技术
为了增强长期演进(LTE，Long Term Evolution)系统控制信道的容量，R11中提出了一种ePDCCH信道。ePDCCH占用物理下行共享信道(PDSCH，Physical Downlink Shared Channel)的一部分资源，ePDCCH与PDSCH之间采用频分复用的方式工作。
终端在对ePDCCH的处理过程中涉及盲检测处理，然而，现有ePDCCH的处理过程中在执行盲检测之前，由于没有对属于不同候选控制码的数据资源分离，以致于后续盲检测处理过程复杂度高并且不方便实现；在所述盲检测处理过程中涉及循环冗余码校验(CRC，Cyclical Redundancy Check)处理，然而，CRC校验本身也存在出错的可能。一旦候选控制码发生误检，导致真实需要的候选控制码被丢弃，将会导致LTE系统下行调度、上行授权等的异常，严重影响LTE系统性能；另外，由于不同的候选控制码搜索空间可能出现重叠，导致同一个候选控制码在不同的聚合度等级下重复检测出来，严重增加了终端的负担。
因此，提供一种ePDCCH处理方案，既能够方便ePDCCH处理中的盲检测处理，又能够有效的降低误检和重复检测的概率，已成为亟待解决的问题。
发明内容
有鉴于此，本发明实施例期望提供一种ePDCCH处理方法及装置，既能够方便ePDCCH处理中的盲检测处理，又能够有效的降低误检和重复检测的概率。
为达到上述目的，本发明实施例的技术方案是这样实现的：
本发明实施例提供了一种ePDCCH处理方法，所述方法包括：
终端确定ePDCCH承载的候选控制码对应的资源元素(RE，Resource Element)；
对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；
对解速率匹配后的候选控制码进行解交织、盲检测处理；
依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。
上述方案中，所述确定ePDCCH承载的候选控制码对应的RE包括：
确定ePDCCH承载的候选控制码对应的天线端口，按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上，确定所述候选控制码对应的RE。
上述方案中，所述对解扰后的候选控制码进行解速率匹配包括：
确定解扰后的候选控制码的码字长度M，若所述码字长度的N倍N*M小于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配合并处理；若所述N*M的值大于等于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配打孔透传处理；其中，N为正数。
上述方案中，所述对解扰后的候选控制码进行解速率匹配之后，所述方法还包括：
存储进行解速率匹配后的候选控制码数据，并记录所述候选控制码信道承载的数据量。
上述方案中，所述对解速率匹配后的候选控制码进行解交织、盲检测处理之前，所述方法还包括：
确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理。
上述方案中，所述依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决包括：
判断当前获得的盲检测中校验正确的候选控制码的搜索空间的起始位置与已经获取的盲检测中校验正确的其它候选控制码搜索空间的起始位置是否相同，若当前候选控制码的搜索空间的起始位置与其它候选控制码搜索空间的起始位置均不同，则判定当前的候选控制码为有效候选控制码；
若当前候选控制码的搜索空间的起始位置中存在与当前候选控制码搜索空间的起始位置相同的候选控制码，则进一步获取所述相同的候选控制码的聚合度等级；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级(AL，Aggregation Level)＝1，则确定经卷积译码输出门限值大的候选控制码的有效性更高；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＞1，则丢弃所述相同的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＝1，则丢弃当前的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＞1，则确定经卷积译码输出门限值大的候选控制码的有效性更高。
本发明实施例还提供了一种ePDCCH处理装置，所述装置位于终端，所述装置包括：确定模块、第一处理模块、第二处理模块及有效性判决模块；其中，
所述确定模块，配置为确定ePDCCH承载的候选控制码对应的RE；
所述第一处理模块，配置为对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；
所述第二处理模块，配置为对解速率匹配后的候选控制码进行解交织、盲检测处理；
所述有效性判决模块，配置为依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。
上述方案中，所述确定模块，配置为确定ePDCCH承载的候选控制码对应的天线端口，按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上，确定所述候选控制码对应的RE。
上述方案中，所述第一处理模块，配置为确定解扰后的候选控制码的码字长度M，若所述码字长度的N倍N*M小于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配合并处理；若所述N*M的值大于等于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配打孔透传处理；其中，N为正数。
上述方案中，所述装置还包括存储模块，配置为存储进行解速率匹配后的候选控制码数据，并记录所述候选控制码信道承载的数据量。
上述方案中，所述第二处理模块，还配置为确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理。
上述方案中，所述有效性判决模块，配置为判断当前获得的盲检测中校验正确的候选控制码的搜索空间的起始位置与已经获取的盲检测中校验 正确的其它候选控制码搜索空间的起始位置是否相同，若当前候选控制码的搜索空间的起始位置与其它候选控制码搜索空间的起始位置均不同，则判定当前的候选控制码为有效候选控制码；
若当前候选控制码的搜索空间的起始位置中存在与当前候选控制码搜索空间的起始位置相同的候选控制码，则进一步获取所述相同的候选控制码的聚合度等级；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＝1，则确定经卷积译码输出门限值大的候选控制码的有效性更高；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＞1，则丢弃所述相同的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＝1，则丢弃当前的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＞1，则确定经卷积译码输出门限值大的候选控制码的有效性更高。
本发明实施例还提供了一种计算机存储介质，所述计算机存储介质存储有计算机程序，该计算机程序用于执行本发明实施例的上述ePDCCH处理方法。
本发明实施例所提供的ePDCCH处理方法、装置及存储介质，终端确定ePDCCH承载的候选控制码对应的RE；对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；对解速率匹配后的候选控制码进行解交织、盲检测处理；依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。如此，既能够方便ePDCCH处理中的盲检测处理，又能够有效的降低误检和重复检测的概率，且适用于载 波聚合技术，节省了ePDCCH处理时间及物理资源。
附图说明
图1为按照时域和频域分成的传输资源结构示意图；
图2为对资源元素进行映射及编号的示意图；
图3为本发明实施例一ePDCCH处理方法流程示意图；
图4为本发明实施例二ePDCCH处理方法流程示意图；
图5为本发明实施例ePDCCH处理装置组成结构示意图。
具体实施方式
图1为在LTE通信系统中，按照时域和频域分成的传输资源结构如下：最大的时间单元是10ms的无线帧，被分成10个1ms的子帧，每个子帧又被分成两个0.5ms的时隙。对于常规循环前缀，每个时隙由7个OFDM符号组成，对于扩展循环前缀，每个时隙由6个OFDM符号组成。在频域上，每12个子载波组成一个单位资源(总共占用180kHz带宽)，因此，频域上的一个单位资源，时域上的一个时隙资源构成一个资源块(RB，Resource Block)，如图1所示，其中，11为资源块(RB)，为
Figure PCTCN2015089519-appb-000001
个资源元素(RE)；12为资源元素RE(k，l)。
ePDCCH所占用的物理资源块对(PRB-pair，Physical Resource Block-pair)的位置通过高层无线资源控制(RRC，Radio Resource Control)信今指示。每个用户终端(UE，User Equipment)可配置最多两个ePDCCH集合(ePDCCH sets)，每个ePDCCH集合包含2个、4个或者8个PRB-pair，基站可以根据通信链路的具体情况灵活分配ePDCCH资源总数。
为了有效配置ePDCCH时频资源，LTE R11系统中增加了两个专用的资源分配单元：增强RE组(eREG，enhanced RE group，)和增强控制信道单元(eCCE，enhanced Control Channel Element)；一个eCCE包含4 个或者8个eREG。一个PRB-pair中固定包含16个eREG(编号：0～15)；在每个PRB-pair中，先频域后时域依次对所有RE(除去解调参考信号DMRS，如图2中点填充的RE)依次进行0到15循环编号，如图2所示；一个eREG由与它编号相同的所有RE构成(除去被Legacy downlink control region、小区参考信号Cell-RS和信道状态信息参考信号CSI-RS所占用的RE)；图2中竖线填充的区域表示CSI-RS所占用的RE，斜线填充的区域表示Cell-RS占用的RE，横线填充的区域表示PCFICH/PHICH/PDCCH占用的RE，阴影填充的区域表示ePDCCH所占用的RE；这种映射方法使得一个eREG中的RE资源均匀分布在整个PRB-pair上，平衡了所有eREG的接收性能。
ePDCCH支持两种类型的资源分配，即存在两种ePDCCH传输方式：集中式(Localized)ePDCCH传输和分布式(Distributed)ePDCCH传输，而具体采用哪种传输方式，由基站根据通信链路情况分配后通过信今传达给小区中的终端；其中，集中式ePDCCH传输可以有效提高频谱效率，其一般应用在基站能够获取到可靠的信道状态信息的情况下，而分布式ePDCCH传输，一般应用在基站不依赖于信道状态信息的情况下，可增强ePDCCH的健壮性；
对于下行子帧i，ePDCCH集合Xm，m＝1或2，可用于ePDCCH传输的eCCE索引为NECCE，m，i-1，并且eCCEn所对应的eREG编号如下：
对于集中式ePDCCH映射，所包含的eREG编号为：
Figure PCTCN2015089519-appb-000002
PRB-pair索引为
Figure PCTCN2015089519-appb-000003
对于分布式ePDCCH映射，所包含的eREG编号为：
Figure PCTCN2015089519-appb-000004
PRB-pair索引为
Figure PCTCN2015089519-appb-000005
其中，
Figure PCTCN2015089519-appb-000006
为一个eCCE中所包含eREG的个数，
Figure PCTCN2015089519-appb-000007
为一个PRB-pair中所包含eCCE的个数。ePDCCH集合Xm(m＝1或2)中包含的PRB-pair编号为
Figure PCTCN2015089519-appb-000008
如表一所示，为不同场景下，每个eCCE所包含eREG的个数；
Figure PCTCN2015089519-appb-000009
表一
在本发明实施例中，终端确定ePDCCH承载的候选控制码对应的RE；对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；对解速率匹配后的候选控制码进行解交织、盲检测处理；依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。
实施例一
图3所示为本发明实施例一ePDCCH处理方法流程示意图；如图3所示，本发明实施例ePDCCH处理方法包括：
步骤301：终端确定ePDCCH承载的候选控制码对应的RE；
在本发明实施例中，所述候选控制码的类型包括三种，分别为：TYPE_A、TYPE_B和TYPE_C；其中，
TYPE_A类型的候选控制码包含下行控制信息(DCI，Downlink Control Information)format 1/DCI format 1B/DCI format 1D/DCI format 2/DCI format  2A/DCI format 2B/DCI format 2C/DCI format 2D；
TYPE_B类型的候选控制码包含DCI format 0/DCI format 1A；
TYPE_C类型的候选控制码包含DCI format 4。
本步骤包括：确定ePDCCH承载的候选控制码对应的天线端口，按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上，确定所述候选控制码对应的RE；
这里，所述确定ePDCCH承载的候选控制码对应的天线端口包括：
对于集中式ePDCCH传输，一个候选控制码对应的天线端口p由下式决定：
Figure PCTCN2015089519-appb-000010
其中，nECCE，low为ePDCCH集合(set)中承载该候选控制码所使用eCCE的最小索引值，nRNTI为该候选控制码加掩的RNTI值，
Figure PCTCN2015089519-appb-000011
为一个PRB-pair中包含的eCCE个数。如表二所示，为集中式ePDCCH传输不同场景下候选控制码对应的天线端口，当n′的值确定后，即可获得所述候选控制码对应的天线端口。
Figure PCTCN2015089519-appb-000012
表二
表三所示为不同的ePDCCH格式下对应的ePDCCH信道所使用的 eCCE个数，即
Figure PCTCN2015089519-appb-000013
Figure PCTCN2015089519-appb-000014
表三
对于分布式ePDCCH传输，一个eREG中的RE(k，l)交替映射到两个天线端口，从子帧内(k＝0，l＝0)位置开始，先频域再时域，从天线端口107开始，当系统配置在常规循环前缀时，所述候选控制码对应的天线端口p∈{107，109}；当系统配置在扩展循环前缀时，所述候选控制码对应的天线端口p∈{107，108}。
在一实施例中，将所述候选控制码映射至对应的天线端口时频资源的RE上时，所述RE的位置(k，l)为所述候选控制码所对应的eREG所处位置，且所述RE的位置(k，l)不被小区参考信号(Cell-RS，Cell-Reference Signal)及信道状态信息参考信号(CSI-RS，Channel State Information-Reference Signal)占用，且所述RE的位置(k，l)位于该子帧内ePDCCH起始OFDM符号或其之后的OFDM符号，并且位于下一个子帧之前。
在一实施例中，对于集中式ePDCCH传输，根据协议，得到如下方程 (2)和(3)：
Figure PCTCN2015089519-appb-000015
Figure PCTCN2015089519-appb-000016
设
Figure PCTCN2015089519-appb-000017
将其代入(2)，(3)得到：
Figure PCTCN2015089519-appb-000018
Figure PCTCN2015089519-appb-000019
进而可得：
Figure PCTCN2015089519-appb-000020
由(5)、(6)最终得到：
Figure PCTCN2015089519-appb-000021
其中，
Figure PCTCN2015089519-appb-000022
为RE所在的PRB-pair编号，ereg_i为RE所在的eREG编号，n为RE所在的eCCE编号；依据公式(7)即可得到集中式ePDCCH传输情况下，隶属与所述候选控制码的时频资源的RE(k，l)，以将隶属于不同候选控制码的数据资源分离，实现候选控制码资源解映射。
对于分布式ePDCCH传输，根据协议，得到如下方程(8)和(9)：
Figure PCTCN2015089519-appb-000023
Figure PCTCN2015089519-appb-000024
设
Figure PCTCN2015089519-appb-000025
将其代入(8)，(9)得到：
Figure PCTCN2015089519-appb-000026
Figure PCTCN2015089519-appb-000027
因为
Figure PCTCN2015089519-appb-000028
所以有：
Figure PCTCN2015089519-appb-000029
将(12)代入(10)，得到：
Figure PCTCN2015089519-appb-000030
即
Figure PCTCN2015089519-appb-000031
Figure PCTCN2015089519-appb-000032
根据(11)，如果
Figure PCTCN2015089519-appb-000033
则，
Figure PCTCN2015089519-appb-000034
否则，
Figure PCTCN2015089519-appb-000035
根据(12)、(16)、(17)和(18)，最终得到
Figure PCTCN2015089519-appb-000036
其中，
Figure PCTCN2015089519-appb-000037
为RE所在的PRB-pair编号，ereg_i为RE所在的eREG编号，n为RE所在的eCCE编号；依据公式(19)即可得到分布式ePDCCH传输情况下，隶属与所述候选控制码的时频资源的RE(k，l)，以将隶属于不同候选控制码的数据资源分离，实现候选控制码资源解映射。如此，方便后续ePDCCH处理中的盲检测处理。
在一实施例中，所述ePDCCH承载的候选控制码可以有一个或多个，本步骤完成的是确定ePDCCH承载的所有候选控制码对应的资源元素RE。
在一实施例中，本发明实施例所述ePDCCH处理方法适用于载波聚合技术，在载波聚合情况下，本步骤实现的是分量载波a(1＜＝a＜＝B；其中，B为分量载波个数)上所有候选控制码的时频资源的资源元素RE(k，l)的确定过程；其中，所述载波聚合技术包括载波聚合独立载波调度及载波聚合跨载波调度；
LTE-A系统中，每个下行分量载波上都可能有ePDCCH承载对这个分量载波的下行资源分配和对相应上行分量载波的上行资源授权，这种情形称之为载波聚合独立载波调度；所述载波聚合跨载波调度，即一个分量载 波上的ePDCCH可以调度另一个分量载波上的资源分配和数据传输。
步骤302：对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；
这里，所述对所述候选控制码对应的RE进行解扰包括：
依据ePDCCH的解扰扰码序列c(n)对所述候选控制码对应的RE进行解扰；
其中，ePDCCH的解扰扰码序列c(n)为：
c(n)＝(x1(n+NC)+x2(n+NC))mod2；其中，
x1(n+31)＝(x1(n+3)+x1(n))mod2；
x2(n+31)＝(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2；
NC＝1600，x1(0)＝1，x1(n)＝0，n＝1，2，...，30；
序列x2的扰码初始值为：
Figure PCTCN2015089519-appb-000038
其中，m为ePDCCH集合序号，m＝0或1；ns是LTE系统中的时隙号(0～19)；
Figure PCTCN2015089519-appb-000039
为高层配置的参数。
ePDCCH解扰，需要分别针对两个集合并行产生各自集合的扰码，所述对所述候选控制码对应的RE进行解扰实现的是对ePDCCH承载的所有候选控制码的解扰，即对隶属于不同ePDCCH集合且隶属于不同候选控制码的RE进行解扰。
在一实施例中，对解扰后的候选控制码进行解速率匹配包括：
确定解扰后的候选控制码的码字长度M，若所述码字长度的N倍N*M小于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配合并处理；若所述N*M的值大于等于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配打孔透传处理；其中，M为正数；所述N为正数，N值可依据实际需要进行设定，在一实施例中，所述N为3。
这里，确定解扰后的候选控制码的码字长度M包括：依据LTE系统带宽、载波聚合类型等系统参数，确定解扰后的候选控制码的码字长度M。
在一实施例中，在载波聚合情况下，本步骤实现的是分量载波a(1＜＝a＜＝B；其中，B为分量载波个数)上所有候选控制码的解扰、解速率匹配过程。
在一实施例中，本步骤之后，所述方法还包括：存储进行解速率匹配后的候选控制码数据，并记录所述候选控制码信道承载的数据量；具体可存储至随机存取存储器(Random Access Memory)等；
这里，在对解扰后的候选控制码进行解速率匹配之后，执行对解速率匹配后的候选控制码数据的存储，当在对解扰后的候选控制码进行解速率匹配过程中执行的是解速率匹配合并时，执行完解速率匹配合并之后执行所述存储，可节省物理存储资源。
步骤303：对解速率匹配后的候选控制码进行解交织、盲检测处理；
本步骤之前，所述方法还包括：
确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理；也就是说，当确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，可知存储的解速率匹配后的候选控制码数据定是经解速率匹配打孔透传后的候选控制码数据，需要执行打孔补零处理，而补零的数量依据记录的所述候选控制码信道承载的数据量及所述候选控制码的码字长度确定；
所述对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理包括：对进行解速率匹配打孔透传后的每个候选控制码依次进行打孔补零处理，即对每个候选控制码进行串行处理。
在一实施例中，所述对解速率匹配后的候选控制码进行解交织包括：
对解速率匹配后的候选控制码按照先列后行的顺序写入，然后依据列 置换规则进行列置换，再以先行再列的顺序读出，完成解交织过程，实现解速率匹配之后的数据重排，以完成以基站发送的顺序将数据发出以进行盲检测过程；
所述列置换规则如表四所示；
Figure PCTCN2015089519-appb-000040
表四
这里，实现所述列置换主要依据解交织矩阵，所述矩阵包括固定的32列，矩阵的行数由候选控制码的码字长度确定。
在一实施例中，对解交织后的候选控制码进行盲检测处理包括：
确定所述解交织后的候选控制码的搜索空间，在所述搜索空间内对解交织后的候选控制码进行卷积译码、无线网络临时标识(RNTI，Radio Network Tempory Identity)值去掩和CRC处理；
这里，为了支持链路自适应，并尽量降低终端检测复杂度，ePDCCH资源映射以eCCE为单位。根据承载的候选控制码的码字长度和信道状态，基站可选择使用聚合度L∈{1，2，4，8，16，32}承载一个候选控制码，称为eCCE聚合度等级(AL，Aggregation Level)，信道状态好(坏)可以选用较低(较高)的eCCE聚合度等级；终端在ePDCCH资源区域不但需要搜索候选控制码所在eCCE的起始位置，还需要搜索基站发送候选控制码所使用的聚合度等级，起始位置到聚合度等级结束位置称为此候选控制码的 搜索空间；
所述确定所述解交织后的候选控制码的搜索空间包括：
依据
Figure PCTCN2015089519-appb-000041
确定所述解交织后的候选控制码的搜索空间；其中，
i＝0，…，L-1；b＝nCI(载波聚合时)，b＝0(非载波聚合时)；所述nCI为服务小区的载波指示域(CIF，Carrier Indicator Field)，即服务小区索引；
Figure PCTCN2015089519-appb-000042
为服务小区ePDCCH集合p、聚合度等级为L，L∈{1，2，4，8，16，32}上的候选控制码个数；
NECCE，p，k为下行子帧k，ePDCCH集合p中的eCCE总数；
Yp，k＝(Ap·Yp，k-1)modD；其中，Yp，-1＝nRNTI≠0，A0＝39827，A1＝39829，D＝65537，
Figure PCTCN2015089519-appb-000043
ns为时隙号，nRNTI为RNTI的值；
这里，所述Yp，k为伪随机参数，可使候选控制码的eCCE起始位置随子帧号及终端ID而改变，这样可以避免一个下行子帧中多个终端之间的候选控制码发生冲突的可能性。
在本发明实施例中，对解速率匹配后的候选控制码进行解交织、盲检测处理为对解速率匹配后的候选控制码的串行处理。
在一实施例中，在载波聚合情况下，本步骤实现的是分量载波a(1＜＝a＜＝B；其中，B为分量载波个数)上承载的一个候选控制码的解交织、盲检测过程，即对解速率匹配后的候选控制码的串行处理；载波聚合跨载波调度场景下，对多个服务小区的候选控制码并行进行盲检测，节省了ePDCCH处理的时间；而对隶属于每个分量载波上的候选控制码的盲检测进行串行处理，节省了物理面积。
步骤304：依据预设的判决策略对所述盲检测中校验正确的候选控制码 进行有效性判决；
本步骤包括：判断当前获得的盲检测中校验正确的候选控制码的搜索空间的起始位置与已经获取的盲检测中校验正确的其它候选控制码搜索空间的起始位置是否相同，若当前候选控制码的搜索空间的起始位置与其它候选控制码搜索空间的起始位置均不同，则判定当前的候选控制码为有效候选控制码；
若其它候选控制码搜索空间的起始位置中存在与当前候选控制码搜索空间的起始位置相同的候选控制码，则进一步获取所述相同的候选控制码的聚合度等级；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＝1，则确定经卷积译码输出门限值大的候选控制码的有效性更高；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＞1，则丢弃所述相同的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＝1，则丢弃当前的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＞1，则确定经卷积译码输出门限值大的候选控制码的有效性更高。
在本发明实施例中，对所述盲检测中校验正确的候选控制码进行有效性判决均是针对相同DCI类型的候选控制码的有效性判决。
在一实施例中，本步骤之前，所述方法还包括：设置在所有聚合等级上，AL＝1的候选控制码优先级最低，AL＞1的其他聚合等级上的候选控制码优先级相同，且对于同一个聚合等级上的候选控制码之间的优先级相同，且对于相同优先级的候选控制码，经卷积译码输出门限值大的候选控制码 的有效性更高，即将获得更大的选中可能。
在一实施例中，在载波聚合情况下，本步骤实现的是分量载波a(1＜＝a＜＝B；其中，B为分量载波个数)上承载的一个候选控制码的有效性判决过程，即对盲检测后的候选控制码执行串行处理。
图4为本发明实施例二ePDCCH处理方法流程示意图；应用于载波聚合场景下，如图4所示，本发明实施例ePDCCH处理方法包括：
步骤401：终端确定分量载波a上承载的候选控制码对应的RE；
本步骤包括：确定分量载波a上ePDCCH承载的候选控制码对应的天线端口，按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上，确定所述候选控制码对应的RE；其中，1＜＝a＜＝B；B为分量载波个数；
其中，所述确定分量载波a上ePDCCH承载的候选控制码对应的天线端口包括：对于集中式ePDCCH传输，
依据
Figure PCTCN2015089519-appb-000044
确定n′的值；其中，nECCE，low为ePDCCH集合(set)中承载该候选控制码所使用eCCE的最小索引值，nRNTI为该候选控制码加掩的RNTI值，
Figure PCTCN2015089519-appb-000045
为一个PRB-pair中包含的eCCE个数；当n′的值确定后，依据n′与不同场景下候选控制码对应的天线端口的对应关系即可获得所述候选控制码对应的天线端口；其中，所述n′与不同场景下候选控制码对应的天线端口的对应关系如表二所示；
对于分布式ePDCCH传输，一个eREG中的RE(k，l)交替映射到两个天线端口，从子帧内(k＝0，l＝0)位置开始，先频域再时域，从天线端口107开始，当系统配置在常规循环前缀时，所述候选控制码对应的天线端口p∈{107，109}；当系统配置在扩展循环前缀时，所述候选控制码对应的天线端口p∈{107，108}。
在一实施例中，将所述候选控制码映射至对应的天线端口时频资源的 RE上时，所述RE的位置(k，l)为所述候选控制码所对应的eREG所处位置，且所述RE的位置(k，l)不被Cell-RS及CSI-RS占用，且所述RE的位置(k，l)位于该子帧内ePDCCH起始OFDM符号或其之后的OFDM符号，并且位于下一个子帧之前。
在一实施例中，对于集中式ePDCCH传输，
依据
Figure PCTCN2015089519-appb-000046
确定所述候选控制码对应的RE所在的eCCE编号n；其中
Figure PCTCN2015089519-appb-000047
为RE所在的PRB-pair编号，ereg_i为RE所在的eREG编号；
对于分布式ePDCCH传输，
依据
Figure PCTCN2015089519-appb-000048
Figure PCTCN2015089519-appb-000049
Figure PCTCN2015089519-appb-000050
如果
Figure PCTCN2015089519-appb-000051
则，
Figure PCTCN2015089519-appb-000052
否则，
Figure PCTCN2015089519-appb-000053
可确定所述候选控制码对应的RE所在的eCCE编号n，
Figure PCTCN2015089519-appb-000054
其中，
Figure PCTCN2015089519-appb-000055
为RE所在的PRB-pair编号，ereg_i为RE所在的eREG编号；如此，将隶属于不同候选控制码的数据资源分离，实现候选控制码资源解映射。
在一实施例中，所述分量载波a上ePDCCH承载的候选控制码可以有多个，本步骤完成的是确定ePDCCH承载的所有候选控制码对应的RE。
步骤402：对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；
这里，所述对所述候选控制码对应的RE进行解扰包括：
依据ePDCCH的解扰扰码序列c(n)对所述候选控制码对应的RE进行解扰；
其中，ePDCCH的解扰扰码序列c(n)为：
c(n)＝(x1(n+NC)+x2(n+NC))mod2；其中，
x1(n+31)＝(x1(n+3)+x1(n))mod2；
x2(n+31)＝(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2；
NC＝1600，x1(0)＝1，x1(n)＝0，n＝1，2，...，30；
序列x2的扰码初始值为：
Figure PCTCN2015089519-appb-000056
其中，m为ePDCCH集合序号，m＝0或1；ns是LTE系统中的时隙号(0～19)；
Figure PCTCN2015089519-appb-000057
为高层配置的参数。
所述对解扰后的候选控制码进行解速率匹配包括：
确定解扰后的候选控制码的码字长度M，若所述码字长度的N倍N*M小于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配合并处理；若所述N*M的值大于等于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配打孔透传处理；其中，所述N为正数，可依据实际需要进行设定，在一实施例中，所述N为3；
这里，确定解扰后的候选控制码的码字长度M包括：依据LTE系统带宽、载波聚合类型等系统参数，确定解扰后的候选控制码的码字长度M。
在本实施例中，本步骤实现的是分量载波a(1＜＝a＜＝B；B为分量载波个数)上所有候选控制码的解扰、解速率匹配过程。
步骤403：存储进行解速率匹配后的候选控制码数据，并记录所述候选控制码信道承载的数据量；
这里，在对解扰后的候选控制码进行解速率匹配之后，执行对解速率 匹配后的候选控制码数据的存储，当在对解扰后的候选控制码进行解速率匹配过程中执行的是解速率匹配合并时，执行完解速率匹配合并之后执行所述存储，可节省物理存储资源。
步骤404：判断解扰后候选控制码的码字长度M的N倍的值是否大于所述候选控制码信道承载的数据量的大小，如果大于，执行步骤405；否则执行步骤406；
这里，当确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，可知存储的解速率匹配后的候选控制码数据定是经解速率匹配打孔透传后的候选控制码数据，需要执行打孔补零处理；N为整数，在本发明实施例中，N＝3。
步骤405：对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理，然后执行步骤406；
本步骤包括：对进行解速率匹配打孔透传后的每个候选控制码依次进行打孔补零处理，即对每个候选控制码进行串行处理；所述补零的数量依据记录的所述候选控制码信道承载的数据量及所述候选控制码的码字长度确定。
步骤406：对候选控制码进行解交织、盲检测处理；
这里，对候选控制码进行解交织包括：对候选控制码按照先列后行的顺序写入，然后依据列置换规则进行列置换，再以先行再列的顺序读出，完成解交织过程，实现解速率匹配之后的数据重排，以完成以基站发送的顺序将数据发出以进行盲检测过程；所述列置换规则如表四所示。
对解交织后的候选控制码进行盲检测处理包括：
确定所述解交织后的候选控制码的搜索空间，在所述搜索空间内对解交织后的候选控制码进行卷积译码、RNTI值去掩和CRC校验处理。
本步骤实现的是分量载波a(1＜＝a＜＝B；其中，B为分量载波个数)上 承载的一个候选控制码的解交织、盲检测过程，即对解速率匹配后的候选控制码的串行处理；载波聚合跨载波调度场景下，对多个服务小区的候选控制码并行进行盲检测，节省了ePDCCH处理的时间；而对隶属于每个分量载波上的候选控制码的盲检测进行串行处理，节省了物理面积。
步骤407：依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决；
本步骤包括：判断当前获得的盲检测中校验正确的候选控制码的搜索空间的起始位置与已经获取的盲检测中校验正确的其它候选控制码搜索空间的起始位置是否相同，若当前候选控制码的搜索空间的起始位置与其它候选控制码搜索空间的起始位置均不同，则判定当前的候选控制码为有效候选控制码；
若其它候选控制码搜索空间的起始位置中存在与当前候选控制码搜索空间的起始位置相同的候选控制码，则进一步获取所述相同的候选控制码的聚合度等级；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＝1，则确定经卷积译码输出门限值大的候选控制码的有效性更高；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＞1，则丢弃所述相同的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＝1，则丢弃当前的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＞1，则确定经卷积译码输出门限值大的候选控制码的有效性更高。
在本发明实施例中，对所述盲检测中校验正确的候选控制码进行有效 性判决均是针对相同DCI类型的候选控制码的有效性判决。
在一实施例中，本步骤之前，所述方法还包括：设置在所有聚合等级上，AL＝1的候选控制码优先级最低，AL＞1的其他聚合等级上的候选控制码优先级相同，且对于同一个聚合等级上的候选控制码之间的优先级相同，且对于相同优先级的候选控制码，经卷积译码处理输出门限值大的候选控制码的有效性更高，即将获得更大的选中可能。
步骤408：结束本次处理流程。
图5为本发明实施例ePDCCH处理装置组成结构示意图；所述装置应用于终端，如图5所示，本发明实施例ePDCCH处理装置组成包括：确定模块51、第一处理模块52、第二处理模块53及有效性判决模块54；其中，
所述确定模块51，配置为确定ePDCCH承载的候选控制码对应的RE；
所述第一处理模块52，配置为对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；
所述第二处理模块53，配置为对解速率匹配后的候选控制码进行解交织、盲检测处理；
所述有效性判决模块54，配置为依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。
在一实施例中，所述确定模块51，配置为确定ePDCCH承载的候选控制码对应的天线端口，按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上，确定所述候选控制码对应的RE；
其中，所述确定模块51确定ePDCCH承载的候选控制码对应的天线端口包括：
对于集中式ePDCCH传输，
所述确定模块51依据
Figure PCTCN2015089519-appb-000058
确定n′的值；其中，nECCE，low为ePDCCH集合(set)中承载该候选控制码所使 用eCCE的最小索引值，nRNTI为该候选控制码加掩的RNTI值，
Figure PCTCN2015089519-appb-000059
为一个PRB-pair中包含的eCCE个数；当n′的值确定后，依据n′与不同场景下候选控制码对应的天线端口的对应关系即可获得所述候选控制码对应的天线端口；其中，所述n′与不同场景下候选控制码对应的天线端口的对应关系如表二所示；
对于分布式ePDCCH传输，所述确定模块51将一个eREG中的RE(k，l)交替映射到两个天线端口，从子帧内(k＝0，l＝0)位置开始，先频域再时域，从天线端口107开始，当系统配置在常规循环前缀时，所述候选控制码对应的天线端口p∈{107，109}；当系统配置在扩展循环前缀时，所述候选控制码对应的天线端口p∈{107，108}。
在一实施例中，所述确定模块51按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上时，所述RE的位置(k，l)为所述候选控制码所对应的eREG所处位置，且所述RE的位置(k，l)不被Cell-RS及CSI-RS占用，且所述RE的位置(k，l)位于该子帧内ePDCCH起始OFDM符号或其之后的OFDM符号，并且位于下一个子帧之前。
在一实施例中，对于集中式ePDCCH传输，
所述确定模块51依据
Figure PCTCN2015089519-appb-000060
确定所述候选控制码对应的RE所在的eCCE编号n；其中
Figure PCTCN2015089519-appb-000061
为RE所在的PRB-pair编号，ereg_i为RE所在的eREG编号；
对于分布式ePDCCH传输，
依据
Figure PCTCN2015089519-appb-000062
Figure PCTCN2015089519-appb-000063
Figure PCTCN2015089519-appb-000064
如果
Figure PCTCN2015089519-appb-000065
则，
Figure PCTCN2015089519-appb-000066
否则，
Figure PCTCN2015089519-appb-000067
可确定所述候选控制码对应的RE所在的eCCE编号n，
Figure PCTCN2015089519-appb-000068
其中，
Figure PCTCN2015089519-appb-000069
为RE所在的PRB-pair编号，ereg_i为RE所在的eREG编号；如此，将隶属于不同候选控制码的数据资源分离，实现候选控制码资源解映射。
在一实施例中，所述第一处理模块52，配置为依据ePDCCH的解扰扰码序列c(n)对所述候选控制码对应的RE进行解扰；
其中，ePDCCH的解扰扰码序列c(n)为：
c(n)＝(x1(n+NC)+x2(n+NC))mod2；其中，
x1(n+31)＝(x1(n+3)+x1(n))mod2；
x2(n+31)＝(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2；
NC＝1600，x1(0)＝1，x1(n)＝0，n＝1，2，...，30；
序列x2的扰码初始值为：
Figure PCTCN2015089519-appb-000070
其中，m为ePDCCH集合序号，m＝0或1；ns是LTE系统中的时隙号(0～19)；
Figure PCTCN2015089519-appb-000071
为高层配置的参数。
在一实施例中，所述第一处理模块52，配置为确定解扰后的候选控制码的码字长度M，若所述码字长度的N倍N*M小于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配合并处理；若所述N*M的值大于等于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配打孔透传处理；其中，N为正数，在一实施例中，所述N为3；
这里，所述第一处理模块52依据LTE系统带宽、载波聚合类型等系统 参数，确定解扰后的候选控制码的码字长度M。
在一实施例中，所述装置还包括存储模块55，配置为存储进行解速率匹配后的候选控制码数据，并记录所述候选控制码信道承载的数据量。
在一实施例中，所述第二处理模块53，还配置为确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理。
在一实施例中，所述第二处理模块53，配置为确定所述解交织后的候选控制码的搜索空间，在所述搜索空间内对解交织后的候选控制码进行卷积译码、RNTI值去掩和CRC校验处理。
在一实施例中，所述有效性判决模块54，配置为判断当前获得的盲检测中校验正确的候选控制码的搜索空间的起始位置与已经获取的盲检测中校验正确的其它候选控制码搜索空间的起始位置是否相同，若当前候选控制码的搜索空间的起始位置与其它候选控制码搜索空间的起始位置均不同，则判定当前的候选控制码为有效候选控制码；
若当前候选控制码的搜索空间的起始位置中存在与当前候选控制码搜索空间的起始位置相同的候选控制码，则进一步获取所述相同的候选控制码的聚合度等级；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＝1，则确定经卷积译码输出门限值大的候选控制码的有效性更高；
若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＞1，则丢弃所述相同的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＝1，则丢弃当前的候选控制码；
若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚 合度等级AL＞1，则确定经卷积译码输出门限值大的候选控制码的有效性更高。
在一实施例中，所述有效性判决模块54，还配置为设置在所有聚合等级上，AL＝1的候选控制码优先级最低，AL＞1的其他聚合等级上的候选控制码优先级相同，且对于同一个聚合等级上的候选控制码之间的优先级相同，且对于相同优先级的候选控制码，经卷积译码处理输出门限值大的候选控制码的有效性更高，即将获得更大的选中可能。
本发明实施例中提出的所述确定模块、第一处理模块、第二处理模块及有效性判决模块均可以通过处理器来实现，当然也可通过具体的逻辑电路实现；在实际应用中，处理器可以为中央处理器(CPU)、微处理器(MPU)或现场可编程门阵列(FPGA)等；所述存储模块可由存储器实现。
本发明实施例中，如果以软件功能模块的形式实现上述ePDCCH处理方法，并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，ROM)、磁碟或者光盘等各种可以存储程序代码的介质。这样，本发明实施例不限制于任何特定的硬件和软件结合。
相应地，本发明实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机程序，该计算机程序用于执行本发明实施例的上述ePDCCH处理方法。
以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。

Claims (13)

  1. 一种增强型物理下行控制信道ePDCCH处理方法，所述方法包括：
    终端确定ePDCCH承载的候选控制码对应的资源元素RE；
    对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；
    对解速率匹配后的候选控制码进行解交织、盲检测处理；
    依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。
  2. 根据权利要求1所述方法，其中，所述确定ePDCCH承载的候选控制码对应的RE包括：
    确定ePDCCH承载的候选控制码对应的天线端口，按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上，确定所述候选控制码对应的RE。
  3. 根据权利要求1或2所述方法，其中，所述对解扰后的候选控制码进行解速率匹配包括：
    确定解扰后的候选控制码的码字长度M，若所述码字长度的N倍N*M小于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配合并处理；若所述N*M的值大于等于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配打孔透传处理；其中，N为正数。
  4. 根据权利要求1或2所述方法，其中，所述对解扰后的候选控制码进行解速率匹配之后，所述方法还包括：
    存储进行解速率匹配后的候选控制码数据，并记录所述候选控制码信道承载的数据量。
  5. 根据权利要求3所述方法，其中，所述对解速率匹配后的候选控制 码进行解交织、盲检测处理之前，所述方法还包括：
    确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理。
  6. 根据权利要求1或2所述方法，其中，所述依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决包括：
    判断当前获得的盲检测中校验正确的候选控制码的搜索空间的起始位置与已经获取的盲检测中校验正确的其它候选控制码搜索空间的起始位置是否相同，若当前候选控制码的搜索空间的起始位置与其它候选控制码搜索空间的起始位置均不同，则判定当前的候选控制码为有效候选控制码；
    若当前候选控制码的搜索空间的起始位置中存在与当前候选控制码搜索空间的起始位置相同的候选控制码，则进一步获取所述相同的候选控制码的聚合度等级；
    若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＝1，则确定经卷积译码输出门限值大的候选控制码的有效性更高；
    若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＞1，则丢弃所述相同的候选控制码；
    若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＝1，则丢弃当前的候选控制码；
    若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＞1，则确定经卷积译码输出门限值大的候选控制码的有效性更高。
  7. 一种ePDCCH处理装置，所述装置位于终端，所述装置包括：确定模块、第一处理模块、第二处理模块及有效性判决模块；其中，
    所述确定模块，配置为确定ePDCCH承载的候选控制码对应的RE；
    所述第一处理模块，配置为对所述候选控制码对应的RE进行解扰，并对解扰后的候选控制码进行解速率匹配；
    所述第二处理模块，配置为对解速率匹配后的候选控制码进行解交织、盲检测处理；
    所述有效性判决模块，配置为依据预设的判决策略对所述盲检测中校验正确的候选控制码进行有效性判决。
  8. 根据权利要求7所述装置，其中，所述确定模块，配置为确定ePDCCH承载的候选控制码对应的天线端口，按照先频域后时域的顺序将所述候选控制码映射至对应的天线端口时频资源的RE上，确定所述候选控制码对应的RE。
  9. 根据权利要求7或8所述装置，其中，所述第一处理模块，配置为确定解扰后的候选控制码的码字长度M，若所述码字长度的N倍N*M小于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配合并处理；若所述N*M的值大于等于所述候选控制码信道承载的数据量的大小，则对解扰后的候选控制码进行解速率匹配打孔透传处理；其中，N为正数。
  10. 根据权利要求7或8所述装置，其中，所述装置还包括存储模块，配置为存储进行解速率匹配后的候选控制码数据，并记录所述候选控制码信道承载的数据量。
  11. 根据权利要求9所述装置，其中，所述第二处理模块，还配置为确定所述N*M的值大于所述候选控制码信道承载的数据量的大小时，对进行解速率匹配打孔透传后的候选控制码进行打孔补零处理。
  12. 根据权利要求7或8所述装置，其中，所述有效性判决模块，配置为判断当前获得的盲检测中校验正确的候选控制码的搜索空间的起始位置与已经获取的盲检测中校验正确的其它候选控制码搜索空间的起始位置 是否相同，若当前候选控制码的搜索空间的起始位置与其它候选控制码搜索空间的起始位置均不同，则判定当前的候选控制码为有效候选控制码；
    若当前候选控制码的搜索空间的起始位置中存在与当前候选控制码搜索空间的起始位置相同的候选控制码，则进一步获取所述相同的候选控制码的聚合度等级；
    若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＝1，则确定经卷积译码输出门限值大的候选控制码的有效性更高；
    若所述相同的候选控制码的聚合度等级AL＝1，且当前候选控制码的聚合度等级AL＞1，则丢弃所述相同的候选控制码；
    若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＝1，则丢弃当前的候选控制码；
    若所述相同的候选控制码的聚合度等级AL＞1，且当前候选控制码的聚合度等级AL＞1，则确定经卷积译码输出门限值大的候选控制码的有效性更高。
  13. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，该计算机可执行指令用于执行权利要求1至6任一项所述的ePDCCH处理方法。
PCT/CN2015/089519 2015-06-08 2015-09-14 一种增强型物理下行控制信道处理方法、装置及存储介质 Ceased WO2016197472A1 (zh)

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