WO2018137242A1 - 一种下行链路控制信息的处理方法及装置 - Google Patents

一种下行链路控制信息的处理方法及装置 Download PDF

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WO2018137242A1
WO2018137242A1 PCT/CN2017/072747 CN2017072747W WO2018137242A1 WO 2018137242 A1 WO2018137242 A1 WO 2018137242A1 CN 2017072747 W CN2017072747 W CN 2017072747W WO 2018137242 A1 WO2018137242 A1 WO 2018137242A1
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aggregation level
terminal
search space
space size
epdcch
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PCT/CN2017/072747
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English (en)
French (fr)
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李振宇
李志军
李汉涛
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华为技术有限公司
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Priority to EP17894552.3A priority Critical patent/EP3567951B1/en
Priority to PCT/CN2017/072747 priority patent/WO2018137242A1/zh
Priority to CN201780083871.6A priority patent/CN110192418B/zh
Publication of WO2018137242A1 publication Critical patent/WO2018137242A1/zh
Priority to US16/522,221 priority patent/US11044614B2/en

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    • 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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • 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
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/04—Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for processing downlink control information.
  • the LTE coverage enhancement technology includes an uplink coverage enhancement technology and a downlink coverage enhancement technology, where the downlink coverage enhancement technology includes increasing output power or increasing the number of transmit antennas.
  • the LTE small station is a small base station with the characteristics of rapid deployment, easy installation and small size, and the application based on the LTE small station is also wider and wider.
  • the downlink transmission power of the LTE small station is related to the maximum transmission power of the terminal, and the downlink coverage enhancement cannot be achieved by increasing the output power.
  • the small size of the LTE small station can not achieve the downlink coverage enhancement by increasing the number of antennas. Therefore, the downlink coverage enhancement has become one of the technical problems to be solved in the current LTE small stations.
  • the LTE R13 standard introduces the standard of the application scenario of the Internet of Things (English: eMTC).
  • eMTC uses an MTC (Machine Type Communication) physical downlink control channel (MPDCCH).
  • MTC Machine Type Communication
  • the receiving end supporting the MPDCCH obtains the coverage gain by combining the time domain data.
  • most of the terminals do not support the MPDCCH. If the MPDCCH is used to obtain the coverage enhancement, the hardware structure of the terminal needs to be redesigned, which is difficult to operate and has low adaptability.
  • the prior art also implements downlink coverage enhancement by using a method similar to the transmission time interval bundling (TTI Bundling) technology in the uplink coverage enhancement technology.
  • TTI Bundling transmission time interval bundling
  • the downlink transmitting end repeatedly transmits data through multiple TTIs, and the receiving end performs data combining demodulation by combining data repeatedly transmitted by the transmitting end, thereby obtaining coverage gain.
  • the prior art adopts the time domain repetition method to obtain the coverage gain, which also greatly increases the data processing delay of the system and reduces the throughput rate of the system.
  • the time domain repeating method also needs to consider the timing design of Hybrid Automatic Repeat reQuest (HARQ), which has high complexity and low adaptability.
  • HARQ Hybrid Automatic Repeat reQuest
  • the present application provides a method and an apparatus for processing downlink control information, which can improve the gain of downlink coverage and improve the diversity of implementation methods of downlink coverage enhancement.
  • a method for obtaining downlink control information which may include:
  • the terminal determines a predefined search space according to the aggregation level supported by the terminal, where the predefined search space includes a search space corresponding to at least one of the aggregation level 16 and the aggregation level 24;
  • the terminal performs blind detection on the predefined search space to acquire downlink control information DCI.
  • the aggregation level supported by the terminal includes an aggregation level 16;
  • the predefined search space includes a common search space size corresponding to the aggregation level 16 and a terminal-specific search space size, and a number of physical downlink control channel PDCCH candidates corresponding to the common search space size, and the terminal-specific search space.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the terminal-specific search space size is 1.
  • the aggregation level supported by the terminal includes an aggregation level 24;
  • the predefined search space includes a common search space size corresponding to the aggregation level 24 and a terminal-specific search space size, and a number of PDCCH candidates corresponding to the common search space size and a size of the terminal-specific search space. Number of PDCCH candidates;
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the terminal-specific search space size is 1.
  • the aggregation level supported by the terminal includes aggregation levels 16 and 24;
  • the predefined search space includes a common search space size and a terminal-specific search space size corresponding to the aggregation levels 16 and 24, and a number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation levels 16 and 24.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 16 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 16 is 1.
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 24 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 24 is 1.
  • the aggregation level supported by the terminal includes aggregation levels 16 and 24;
  • the predefined search space includes a common search space size and a terminal-specific search space size corresponding to the aggregation levels 16 and 24, and a number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation levels 16 and 24.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 16 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 32, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 16 is 2;
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 24 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 48, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 24 is 2.
  • the method before the determining, by the terminal, the predefined search space according to the supported aggregation level, the method further includes:
  • the terminal reports to the base station at least one aggregation level supported by the terminal;
  • the DCI is carried on a physical resource corresponding to an aggregation level N in the at least one aggregation level.
  • the method further includes:
  • the reporting, by the terminal, the at least one aggregation level supported by the terminal to the base station includes:
  • the terminal searches for the aggregation level supported by the cell from the aggregation level supported by the cell, and selects at least one aggregation level from the aggregation level supported by the terminal, and reports the selected at least one aggregation level to the base station.
  • the cell and the aggregation level supported by the terminal can be extended to the aggregation level 16 or 24.
  • the base station can adapt the DCI sent to the UE to a larger physical resource, if the information bits are unchanged.
  • the PDCCH transmission code rate is lowered to obtain a PDCCH coverage gain.
  • the base station sends the DCI to the UE, the aggregation level corresponding to the physical resource for carrying the DCI information is determined by the aggregation level supported by the cell, and the aggregation level is selected from the aggregation levels supported by the UE.
  • the DCI information that is sent to the terminal is sent to the UE in the physical resource corresponding to the aggregation level.
  • the operation is more flexible, the correlation is stronger, and the applicability is higher.
  • the terminal performs PDCCH blind detection, it only needs to perform blind detection on the search space corresponding to each aggregation level reported by the terminal, and does not need to blindly check all the aggregation levels supported by the cell or the search spaces corresponding to all the aggregation levels supported by the cell, thereby reducing the DCI.
  • the processing complexity of information can improve the processing efficiency of DCI information.
  • the second aspect provides a method for acquiring downlink control information, which may include:
  • a blind detection search space of the terminal from a predefined search space according to the number of resource blocks RB occupied by the enhanced physical downlink control channel EPDCCH and the aggregation level supported by the terminal, where the predefined search space includes The number of RBs is 16 corresponding to the search space;
  • the terminal performs blind detection on the blind detection search space to acquire downlink control information DCI.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH at each aggregation level, as shown in Table 1:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH at each aggregation level, as shown in Table 2 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH at each aggregation level, as shown in Table 3 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH at each aggregation level, as shown in Table 4 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH at each aggregation level, as shown in Table 5 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH at each aggregation level, as shown in Table 6 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level Table 7 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level As shown in Table 8 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level See Table 9 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level As shown in Table 10 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level As shown in Table 11 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level As shown in Table 12 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level As shown in Table 13 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level As shown in Table 14 below:
  • the L is an aggregation level.
  • the predefined search space includes the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the first physical resource set Xp1 at each aggregation level.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by the EPDCCH of the second physical resource set Xp2 at each aggregation level Table 15 below:
  • the L is an aggregation level.
  • the predefined search space further includes a search space corresponding to the number of RBs, and the aggregation level corresponding to the number of RBs is 32.
  • the application can extend the EPDCCH detection candidate user set, expand the number of RBs occupied by the EPDCCH, and the aggregation level supported by the UE, and further expand the EPDCCH candidate user set, expand the channel coverage of the EPDCCH, and improve the channel coverage gain of the EPDCCH.
  • the third aspect provides a method for acquiring downlink control information, which may include:
  • the terminal reports to the base station at least one aggregation level supported by the terminal, where the at least one aggregation level includes an aggregation level N;
  • the terminal performs blind detection on the downlink control information DCI delivered by the base station according to each aggregation level in the at least one aggregation level;
  • the terminal performs a blind detection error on two identical DCIs that are carried on the physical resources of the physical downlink control channel PDCCH according to the aggregation level N, and then performs frequency domain data combining the two identical DCIs;
  • the terminal performs blind detection on the result of combining the frequency domain data according to the aggregation level N to obtain the DCI delivered by the base station.
  • the method further includes:
  • the message is provided to the base station for determining whether two PDCCH physics are in the aggregation level N.
  • the DCI of the terminal is repeatedly transmitted on the resource.
  • the fourth aspect provides a method for sending downlink control information, which may include:
  • the base station receives at least one aggregation level supported by the terminal reported by the terminal, where the at least one aggregation level includes an aggregation level N;
  • the base station splits downlink control information DCI for controlling the terminal into a first DCI and a second DCI;
  • the first DCI and the second DCI are respectively carried on the two different physical downlink control channel PDCCH physical resources corresponding to the aggregation level N, where the first DCI and the second CDI are used for the terminal to perform the joint Parsing; the N is a natural number.
  • the method further includes: receiving, by the base station, a message reported by the terminal, and determining, according to the message, that the terminal has a frequency domain data combining capability.
  • the method before the base station splits the DCI of the terminal into the first DCI and the second DCI, the method further includes:
  • the base station determines that the terminal has frequency domain data combining capability, and includes:
  • the base station acquires a preamble of the physical random access channel of the terminal, and determines, according to the preamble, that the terminal has a frequency domain data combining capability.
  • the base station may send the DCI of the UE on the same TTI on two different PDCCH physical resources, that is, the base station may repeatedly send the DCI of the UE twice on the same TTI, and merge the data through the frequency domain data. Get higher coverage gain, easier operation and high applicability.
  • the fifth aspect provides a method for acquiring downlink control information, which may include:
  • the terminal reports to the base station at least one aggregation level supported by the terminal, where the at least one aggregation level includes an aggregation level N;
  • the terminal performs blind detection on the downlink control information DCI delivered by the base station according to each aggregation level in the at least one aggregation level;
  • the terminal blindly checks the first DCI and the second DCI that are carried on the physical resources of the two physical downlink control channel PDCCHs according to the aggregation level N, the first DCI and the second DCI are The joint assembly is performed to obtain the DCI delivered by the base station.
  • the method further includes:
  • the terminal reports to the base station that the terminal has a frequency domain data combining capability message.
  • the base station allocates two DCNs of the aggregation level (that is, candidate CCE resources) to the DCI to be transmitted, which is equivalent to halving the information bits carried by the candidate user CCE resources of each aggregation level N.
  • the transmission rate is reduced, the coverage rate is exchanged by the code rate, and the diversity of the implementation of the coverage enhancement is increased, and the applicability is stronger.
  • a sixth aspect provides a terminal, which can include:
  • a determining module configured to determine a predefined search space according to an aggregation level supported by the terminal, where the predefined search space includes a search space corresponding to at least one of the aggregation level 16 and the aggregation level 24.
  • a searching module configured to perform a blind check on the predefined search space determined by the determining module to obtain downlink control information DCI.
  • the aggregation level supported by the terminal includes an aggregation level 16;
  • the predefined search space includes a common search space size corresponding to the aggregation level 16 and a terminal-specific search space size, and a number of physical downlink control channel PDCCH candidates corresponding to the common search space size, and the terminal-specific search space.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the terminal-specific search space size is 1.
  • the aggregation level supported by the terminal includes an aggregation level 24;
  • the predefined search space includes a common search space size corresponding to the aggregation level 24 and a terminal-specific search space size, and a number of PDCCH candidates corresponding to the common search space size and a size of the terminal-specific search space. Number of PDCCH candidates;
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the terminal-specific search space size is 1.
  • the aggregation level supported by the terminal includes aggregation levels 16 and 24;
  • the predefined search space includes a common search space size and a terminal-specific search space size corresponding to the aggregation levels 16 and 24, and a number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation levels 16 and 24.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 16 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 16 is 1.
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 24 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 24 is 1.
  • the aggregation level supported by the terminal includes aggregation levels 16 and 24;
  • the predefined search space includes a common search space size and a terminal-specific search space size corresponding to the aggregation levels 16 and 24, and a number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation levels 16 and 24.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 16 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 32, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 16 is 2;
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 24 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 48, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 24 is 2.
  • the terminal further includes:
  • a sending module configured to report, to the base station, at least one aggregation level supported by the terminal
  • the DCI is carried on a physical resource corresponding to an aggregation level N in the at least one aggregation level.
  • the determining module is further configured to:
  • the sending module is used to:
  • Searching for an aggregation level supported by the terminal from the aggregation level supported by the cell and selecting at least one aggregation level from the aggregation levels supported by the terminal, and reporting the selected at least one aggregation level to the base station .
  • a seventh aspect provides a terminal, which can include:
  • a determining module configured to determine, according to the number of resource blocks RB occupied by the enhanced physical downlink control channel EPDCCH and an aggregation level supported by the terminal, a blind search space of the terminal from a predefined search space, where the predefined
  • the search space includes a search space corresponding to the number of RBs of 16;
  • a searching module configured to perform blind detection on the blind detection search space determined by the determining module to obtain downlink control information DCI.
  • the predefined search space includes data as shown in any one of Tables 1 to 15 above.
  • the predefined search space further includes a search space corresponding to the number of RBs, and the aggregation level corresponding to the number of RBs is 32.
  • the eighth aspect provides a terminal, which can include:
  • a sending module configured to report, to the base station, at least one aggregation level supported by the terminal, where the at least one aggregation level includes an aggregation level N;
  • a search module configured to perform blind detection on the downlink control information DCI sent by the base station according to each aggregation level in the at least one aggregation level reported by the sending module;
  • a merging module configured to: when the search module performs a blind detection error on two identical DCIs that are carried on two physical downlink control channel PDCCH physical resources according to the aggregation level N, perform the two identical DCIs Frequency domain data combination;
  • the search module is further configured to perform blind detection on the result of combining the frequency domain data by the merging module according to the aggregation level N to obtain the DCI delivered by the base station.
  • the sending module is further configured to:
  • the message is provided to the base station for determining whether to repeatedly send the DCI of the terminal on two PDCCH physical resources of the aggregation level N.
  • a ninth aspect provides a base station, which can include:
  • a receiving module configured to receive at least one aggregation level supported by the terminal reported by the terminal, where the at least one aggregation level includes an aggregation level N;
  • a processing module configured to split downlink control information DCI for controlling the terminal into a first DCI and a second DCI;
  • a sending module configured to send the first DCI and the second DCI processed by the processing module to the terminal;
  • the first DCI and the second DCI are respectively carried on the two different physical downlink control channel PDCCH physical resources corresponding to the aggregation level N, where the first DCI and the second CDI are used for the terminal to perform the joint Parsing; the N is a natural number.
  • the base station further includes:
  • the receiving module is configured to receive a message reported by the terminal, and determine, according to the message, that the terminal has a frequency domain data combining capability.
  • processing module is further configured to:
  • a tenth aspect provides a terminal, which can include:
  • a sending module configured to report, to the base station, at least one aggregation level supported by the terminal, where the at least one aggregation level includes an aggregation level N;
  • a search module configured to perform blind detection on downlink control information DCI delivered by the base station according to each aggregation level in the at least one aggregation level;
  • a processing module configured to: when the search module performs blind detection on the first DCI and the second DCI that are carried on the physical resources of the two physical downlink control channel PDCCHs according to the aggregation level N, the first DCI And the second DCI is jointly assembled to obtain the DCI delivered by the base station.
  • the sending module is further configured to:
  • the eleventh aspect provides a terminal, which can include: a memory, a processor, and a transceiver;
  • the memory is for storing a set of program codes
  • the processor and transceiver are configured to invoke program code stored in the memory to perform the methods described in the first, second, third, and fifth aspects above.
  • a twelfth aspect provides a base station, which can include: a memory, a processor, and a transceiver;
  • the storage is for storing a set of program codes
  • the processor and transceiver are configured to invoke program code stored in the memory to perform the method described in the fourth aspect above.
  • the cell and the aggregation level supported by the terminal can be extended to the aggregation level 16 or 24.
  • the base station can adapt the DCI sent to the UE to a larger physical resource, if the information bits are unchanged.
  • the PDCCH transmission code rate is reduced to obtain the PDCCH coverage gain, which can improve the downlink coverage gain, improve the diversity of the implementation of the downlink coverage enhancement, and have higher applicability.
  • the present application may further extend the EPDCCH detection candidate user set, expand the number of RBs occupied by the EPDCCH, and the aggregation level supported by the UE, and further expand the EPDCCH candidate user set, expand the channel coverage of the EPDCCH, and improve the EPDCCH. Channel coverage gain.
  • FIG. 1 is a schematic structural diagram of an LTE communication system provided by the present application.
  • FIG. 2 is a schematic flowchart of a method for processing downlink control information provided by the present application
  • FIG. 3 is another schematic flowchart of a method for processing downlink control information provided by the present application.
  • FIG. 5 is a schematic diagram of frequency domain data combining provided by the present application.
  • FIG. 6 is another schematic diagram of frequency domain data combining provided by the present application.
  • FIG. 7 is another schematic flowchart of a method for processing downlink control information provided by the present application.
  • FIG. 9 is a schematic structural diagram of a terminal provided by the present application.
  • FIG. 10 is another schematic structural diagram of a terminal provided by the present application.
  • FIG. 11 is another schematic structural diagram of a terminal provided by the present application.
  • FIG. 12 is a schematic structural diagram of a base station provided by the present application.
  • FIG. 13 is a schematic structural diagram of a terminal provided by the present application.
  • FIG. 14 is another schematic structural diagram of a terminal provided by the present application.
  • FIG. 15 is another schematic structural diagram of a base station provided by the present application.
  • FIG. 1 is a schematic structural diagram of an LTE communication system provided by the present application.
  • the LTE system provided by the present application includes a terminal (ie, user equipment, User Equipment, UE), a base station (eNodeB), and a network node.
  • the network node may include a mobility management entity (English: Mobility Management Entity, MME) or a service gateway (English: Serving GateWay, S-GW).
  • MME Mobility Management Entity
  • S-GW Serving GateWay
  • the UE and the base station can perform data interaction through the Uu interface, and the data exchange between the base station and the base station can be performed through the X2 interface, and the data exchange between the base station and the network node can be performed through the S1 interface.
  • connection manner of the data exchange between the UE, the base station, and the network node is only an example, and may be determined according to the actual application scenario, and is not limited herein.
  • the data transmission included in the implementation manner provided by the present application is mainly data transmission between the base station and the UE, and the base station may send downlink data to the UE, and the UE may receive data sent by the base station or send uplink data to the base station.
  • the method and apparatus for processing downlink control information provided by the present application will be described below with reference to FIG. 2 to FIG. 15.
  • FIG. 2 is a schematic flowchart of a method for processing downlink control information provided by the present application.
  • the method provided by the application includes the steps of:
  • the UE reports the aggregation level supported by the UE to the base station.
  • the present application may extend a Physical Downlink Control Channel (PDCCH) channel and extend the control channel element (CCE) aggregation level to 16 or 24.
  • the CCE aggregation level supported by the UE (hereinafter referred to as the aggregation level) may be 1, 2, 4, 8 extend to 1, 2, 4, 8, and 16, or 1, 2, 4, 8, and 24, or 1, 2, 4, 8, 16, and 24.
  • the aggregation level supported by the UE is four (ie, aggregation levels 1, 2, 4, and 8).
  • the aggregation level supported by the UE may be five (that is, compared to the existing implementation). There is one more way, such as 16 or 24) or six (that is, two more than the existing implementation, namely 16 and 24).
  • the UE may determine one or more aggregation levels supported by the UE at the current location according to the channel conditions of the location (ie, the cell in which the UE is located).
  • the one or more aggregation levels may be one or more of the five aggregation levels supported by the UE, or may be one or more of the six aggregation levels supported by the UE.
  • the UE can support six aggregation levels of 1, 2, 4, 8, 16, and 24, and the aggregation level supported by the UE may include 2 under the channel condition of the current UE location. 8 and 16, or 1, 4 and 24, etc.
  • the UE may report the one or more aggregation levels supported by the channel in the current location to the base station, or report the one or more aggregation levels that are not supported by the channel in the current location to the base station.
  • the base station may also broadcast an aggregation level supported by the cell in which the UE is located.
  • the UE may determine, according to the broadcast message, an aggregation level supported by the cell where the UE is located. Further, the UE may select one of the multiple aggregation levels supported by the cell according to its own PDCCH blind detection capability, and may select one or more of the aggregation levels supported by the UE to report to the base station.
  • the aggregation level supported by the base station broadcast cell includes six aggregation levels of 1, 2, 4, 8, 16, and 24.
  • the PDCCH blind detection capability of the UE determines the aggregation level supported by the UE, including 1, 4, 8, and 16.
  • the UE can find its supported aggregation level (ie 1, 4, 8, 16, and 24) and select one or more aggregation levels (such as 4) from the aggregation level it supports. , 16 and 24) are reported to the base station.
  • aggregation level ie 1, 4, 8, 16, and 24
  • aggregation levels such as 4
  • the base station may record a search space (ie, a predefined search space) corresponding to each aggregation level supported by the cell in different scenarios by using different search space lists. For example, when the aggregation level supported by the cell includes 1, 2, 4, 8, and 16, the search space corresponding to all aggregation levels can be recorded through one search space list.
  • the base station may broadcast an index of the search space list (such as Tab#1), and the UE may search the search space list according to the index, thereby determining the aggregation level supported by the cell in which the cell is located.
  • Table 1 is a schematic table of the search space list:
  • the aggregation level supported by the cell may be extended to the aggregation level 16.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the UE-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the UE-specific search space size is 1.
  • the common search space size and the dedicated search space size refer to the number of CCEs.
  • a common search space size of 16 indicates that the common search space is 16 CCEs
  • the dedicated search space is 16 indicates that the dedicated search space is 16 CCEs. I will not repeat them below.
  • the search space corresponding to all aggregation levels may be recorded through another search space list.
  • the base station may broadcast an index of the search space list (such as Tab#2), and the UE may search the search space list according to the index, thereby determining the aggregation level supported by the cell in which the cell is located.
  • Table 2 is another schematic table of the search space list:
  • the aggregation level supported by the cell may be extended to the aggregation level 24, where the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the UE-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the UE-specific search space size is 1.
  • the search space corresponding to all aggregation levels may be recorded through another search space list.
  • the base station may broadcast an index of the search space list (such as Tab#3), and the UE may search the search space list according to the index, thereby determining the aggregation level supported by the cell in which the cell is located.
  • Table 3 is another schematic table of the search space list:
  • the aggregation level supported by the cell may be extended to the aggregation levels 16 and 24, wherein the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the UE-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the UE-specific search space size is 1.
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the UE-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the UE-specific search space size is 1.
  • the search space corresponding to all aggregation levels may also be recorded through another search space list.
  • the base station may broadcast an index of the search space list (such as Tab#4), and the UE may search the search space list according to the index, and further determine the aggregation level supported by the cell in which the cell is located.
  • Table 4 is another schematic table of the search space list:
  • the cell supported aggregation level can be extended to aggregation levels 16 and 24.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the UE-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the UE-specific search space size is 2.
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the UE-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the UE-specific search space size is 2.
  • the UE may determine the aggregation level supported by the cell according to the information recorded in the search space list, and then select an aggregation level supported by the UE. And one or more of the selected ones are reported to the base station.
  • UE blind detection only needs to blindly check the aggregation level supported by itself, and the unsupported aggregation level does not perform blind detection, which can reduce the processing complexity of blind detection and improve the processing efficiency of DCI information.
  • the base station according to the aggregation level reported by the UE, carries the DCI required by the UE to the physical resource corresponding to the aggregation level N in the at least one aggregation level reported by the UE, and sends the data to the UE.
  • the base station may aggregate the DCI required by the UE in one of the multiple aggregation levels reported by the UE according to the aggregation level reported by the UE.
  • the DCI information is sent to the UE through the physical resource. That is, in the present application, the aggregation level supported by the UE can be extended to the aggregation level 16 or 24, and the base station can adapt the DCI sent to the UE to a larger physical resource, if the information bits are unchanged.
  • the PDCCH transmission code rate is reduced to obtain a PDCCH coverage gain.
  • the aggregation level corresponding to the physical resource for carrying the DCI information is determined according to the aggregation level supported by the cell, and the aggregation is reported from the UE.
  • An aggregation level is selected in the level, and the information that is sent to the DCI is sent to the UE corresponding to the physical resource corresponding to the aggregation level, and the operation is more flexible, the correlation is stronger, and the applicability is higher.
  • the UE performs PDCCH blind detection on the predefined search space to obtain the DCI delivered by the base station according to the aggregation level supported by the UE.
  • the UE after the UE reports one or more of the supported aggregation levels to the base station, the UE only needs to perform blind detection on the search space corresponding to each aggregation level reported by the UE when performing PDCCH blind detection. There is no need to blindly check all the aggregation levels supported by the cell or the search spaces corresponding to all the aggregation levels supported by the cell, which reduces the processing complexity of the DCI information and improves the processing efficiency of the DCI information.
  • the predefined search space is the search space size and the number of PDCCH candidates corresponding to each aggregation level included in any of the foregoing Tables 1 to 4.
  • the UE may determine a corresponding search space list from the foregoing Table 1 to Table 4 according to the aggregation level reported by the UE, and determine the location according to the predefined search space included in each search space list.
  • a search space that requires blind detection, and then PDCCH blind detection can be performed on the determined search space.
  • the UE obtains the DCI carried on the physical resource corresponding to a certain aggregation level (such as the aggregation level N) by blind detection.
  • the aggregation level supported by the cell and the UE may be extended to the aggregation level 16 or 24.
  • the base station may adapt the DCI sent to the UE to a larger physical resource, if the information bits are unchanged.
  • the PDCCH transmission code rate is lowered to obtain a PDCCH coverage gain.
  • the base station sends the DCI to the UE, the aggregation level corresponding to the physical resource for carrying the DCI information is determined according to the aggregation level supported by the cell, and the aggregation level is selected from the aggregation level reported by the UE.
  • the transmitted DCI information is sent to the UE under the physical resource corresponding to the aggregation level, and the operation is more flexible, the correlation is stronger, and the applicability is higher.
  • the UE performs PDCCH blind detection, it only needs to perform blind detection on the search space corresponding to each aggregation level reported by the UE, and does not need to blindly check all the aggregation levels supported by the cell or the search spaces corresponding to all the aggregation levels supported by the cell, thereby reducing the DCI.
  • the processing complexity of information can improve the processing efficiency of DCI information.
  • FIG. 3 is another schematic flowchart of a method for processing downlink control information provided by the present application.
  • the method provided by the application includes the steps of:
  • the UE reports to the base station that the UE has the capability of combining frequency domain data.
  • the UE may send a message to the base station that it has the capability of combining frequency domain data when accessing the cell network at any time, that is, the UE supports frequency domain data combining.
  • the base station may determine, according to the message reported by the UE, that the UE supports the frequency domain data merging, and may further determine whether to repeatedly send the DCI required by the UE on the two PDCCH physical resources when the DCI required by the UE is sent.
  • the base station may also determine, according to a preamble of a physical random access channel (PRACH) of the UE, that the UE has the capability of combining frequency domain data.
  • PRACH physical random access channel
  • the foregoing preamble is an enhanced preamble (ie, an enhanced Preamble).
  • the enhanced preamble is different from the preamble already defined by LTE, and the enhanced preamble includes the following two features:
  • the existing agreement stipulates that Preamble only needs to support 64 users.
  • This application can expand the number of users that Preamble needs to support to 72, where 0-63 is defined as “normal coverage user set” for supporting 64 users, and 64-71 is defined as “enhanced coverage user set” for Support 8 users.
  • the Preamble that enhances the coverage user is generated by the root index specified by the cell.
  • the root index specified by the foregoing cell is a root index assigned to an enhanced user, and the ordinary user cannot use the root index.
  • the base station identifies the enhanced user by detecting the preamble generated according to the root index specified by the cell, and distinguishes the ordinary user from the enhanced user.
  • the current scenario may be determined as a scenario that needs to be enhanced, and then the DCI delivery mode required by the UE may be determined.
  • the base station may determine, according to the detected preamble, that the UE supports frequency domain data combining, and may further determine whether to repeatedly send the DCI required by the UE on the two PDCCH physical resources when the DCI required by the UE is sent.
  • the UE reports the aggregation level supported by the UE to the base station.
  • the UE may report the aggregation level it supports to the base station.
  • the UE reports the aggregation level that it supports to the base station, or reports the sequence of the frequency domain data merging capability to the base station, which can be determined according to the actual application scenario, and is not limited herein.
  • the aggregation level reported by the UE to the base station may be any aggregation level that is supported by the UE, and may be determined by the actual application scenario.
  • the base station sends the DCI required by the UE to the UE in two PDCCH physical resources.
  • the DCI required by the UE may be respectively carried in two PDCCH physical resources. Further, the base station may determine two physical resources for carrying the DCI required by the UE according to the aggregation level supported by the UE. Specifically, the base station may select one aggregation level (such as aggregation level 8) from the aggregation level supported by the UE, and carry the DCI required by the UE on two different PDCCH physical resources corresponding to the aggregation level 8, respectively. Issued to the UE. Referring to FIG. 4, it is a pattern of frequency domain data combining provided by the present application.
  • the base station selects the aggregation level 8 from the aggregation levels supported by the UE, and determines the PDCCH physical resource corresponding to the aggregation level 8 as the physical resource for carrying the DCI required by the UE.
  • the digital index shown in FIG. 4 is a candidate resource location corresponding to aggregation level 8 (including UE-specific and Common), and the total number of candidate resource locations is M.
  • the candidate resources of the same background color may be combined. For example, two candidate resources with candidate resource locations of 0 and 1 may be combined, and two candidate resources with candidate resource locations of M-2 and M-1 may also be combined.
  • the base station sets the physical resources of the DCI required for carrying the UE to the candidate resource locations corresponding to the digital indexes n and n+1, and defines the values of n and n+1, which can constrain the bearer.
  • the location of the physical resources required by the UE ensures that the UE is aligned with the base station, which can reduce the complexity of data processing.
  • the UE performs blind detection on the required DCI according to each aggregation level supported by the UE.
  • the UE may blind the required DCI on the physical resource corresponding to each aggregation level according to each aggregation level in the reported aggregation level.
  • the level is again a new round of blind inspection.
  • the foregoing frequency domain data combining may include data combining at the symbol level and data combining at the bit level.
  • the UE may combine two identical DCIs carried on two PDCCH physical resources into in-phase quadrature (IQ) symbols.
  • FIG. 5 is a schematic diagram of frequency domain data combining provided by the present application.
  • the UE may perform layer mapping and precoding on the same DCI in the data level processing process at the symbol level, and then perform IQ symbol combining and demodulation on the precoded data, thereby performing data descrambling and blindness. Check and other operations.
  • the UE may also combine two similar DCIs carried on two PDCCH physical resources into a Log Likelihood Ratio (LLR) (or a soft value combination, or Soft bit merge).
  • LLR Log Likelihood Ratio
  • FIG. 6 is another schematic diagram of frequency domain data combining provided by the present application.
  • the UE may perform descrambling on the frequency domain data in the bit-level data merging process, and then perform the LLR merging of the descrambled data and perform a bit-level blind check and other processing operations such as de-rate matching.
  • the merged data is blindly checked again.
  • the UE may perform the blind detection on the merged DCI on the physical resource with the aggregation level of 16.
  • the bearer information is blindly detected, thereby improving the channel coverage of the PDCCH and obtaining the channel coverage gain.
  • the base station can send the DCI required by the UE on the same TTI on the same TTI, that is, the base station can repeatedly send the DCI required by the UE twice on the same TTI.
  • the domain data is combined to obtain higher coverage gain, and the operation is simpler and the applicability is high.
  • FIG. 7 is another schematic flowchart of a method for processing downlink control information provided by the present application.
  • the method provided by the application includes the steps of:
  • the UE reports to the base station that the UE has the DCI joint analysis capability.
  • the UE may report the implementation of the DCI joint resolving capability to the eNodeB.
  • the UE may report the implementation of the DCI joint resolving capability to the eNodeB.
  • the UE reports the aggregation level supported by the UE to the base station.
  • the implementation manner of the UE reporting the aggregation level supported by the UE to the base station may be referred to step S32 in the foregoing embodiment, and details are not described herein again.
  • the base station splits the DCI required by the UE into the first DCI and the second DCI, and sends the two different PDCCH physical resources corresponding to the same aggregation level to the UE.
  • the base station may determine The UE cannot directly parse the DCI by directly delivering the complete DCI to the UE.
  • the base station may split the DCI required by the UE into two parts of the DCI, including the first DCI and the second DCI. Further, the base station may separately transmit the split first DCI and the second DCI to the UE, where the two physical resources correspond to the same aggregation level (for example, aggregation level 8). The transmission code rate is reduced, and the coverage gain can be exchanged by lowering the transmission code rate.
  • the UE performs blind detection on the required DCI according to each aggregation level supported by the UE, and performs joint assembly on the two DCI information obtained by the blind detection.
  • the blinding may be performed.
  • FIG. 8 it is a schematic diagram of the DCI joint assembly provided by the present application.
  • the base station allocates two DCIs with the aggregation level of 8 (ie, candidate CCE resources) to the DCI to be transmitted, which is equivalent to halving the information bits carried by the candidate user CCE resources of each aggregation level 8.
  • the transmission rate is reduced, the coverage rate is exchanged by the code rate, and the diversity of the implementation of the coverage enhancement is increased, and the applicability is stronger.
  • ECCE Enhanced Control Channel Element
  • the Cyclic Prefix includes a normal cyclic prefix (English: Normal CP) and an extended cyclic prefix (English: Extended CP).
  • the data transmission subframe includes a normal subframe (English: Normal subframe).
  • special subframes English: Special subframe. Therefore, two forms of cyclic prefix can be combined with two forms of data transmission subframes to obtain four types of data transmission methods:
  • the above four types of data transmission methods can be classified by two classification methods, and the above four types of data transmission methods can be classified into CaseA and CaseB, or Case1, Case2, and Case3.
  • I.Normal CP&Normal subframe is classified as CaseA;
  • I.Normal CP&Normal subframe is classified as Case1;
  • EPDCCH format In LTE, how many ECCE transmissions of the EPDCCH need to be dependent on the EPDCCH format (EPDCCH format), so it is necessary to define the number of ECCEs occupied by the EPDCCH transmission corresponding to the EPDCCH Format of different values.
  • Table 5 it is a schematic table of the number of ECCEs occupied by a single EPDCCH in LTE.
  • the EPDCCH Format includes five formats: 0, 1, 2, 3, and 4, each format corresponding to multiple resource allocation modes, and various resource allocation modes.
  • Table 5 there are two resource allocation modes under each case, namely Localized transmission and Distributed transmission.
  • CaseA when the EPDCCH format is 0 and the resource allocation mode is Localized transmission, each EPCDD occupies an ECCE of 2; when the EPDCCH format is 1 and the resource allocation mode is Localized Transmission, each EPCDD occupies an ECCE of 4.
  • the number of ECCEs occupied by a single EPDCCH Corresponding to the aggregation level in the PDCCH transmission, the following will refer to the aggregation level by L, which is also referred to as Give an example for explanation.
  • the resource block occupied by the EPDCCH of the UE (labeled as Xp) (English: Resource Block, RB, marked as ) is not the same, the number of EPDCCH candidates included in the corresponding search space is also different.
  • the number of EPDCCH candidates corresponding to the number of RBs occupied by Xp at each aggregation level (English: Number of EPDCCH candidates) may be marked as
  • the number of RBs occupied by the EPDCCH of Xp may include 2, 4, and 8.
  • the number of RBs occupied by Xp is different, and is included in the search space corresponding to the same aggregation level. Not the same.
  • Table 6 and Table 7 below, Table 6 and Table 7 are different Cases, and the number of different RBs corresponds to different aggregation levels.
  • each aggregation level corresponds to For example, in Case1, When it is 2, the aggregation level is 2 4, the aggregation level is 32 Is 0. In Case2, When it is 2, the aggregation level is 1 4, the aggregation level is 16 Is 0.
  • Table 3 shows Case3 For scenarios of 2, 4, and 8, each aggregation level corresponds to For example, in Case3, When it is 2, the aggregation level is 2 4, the aggregation level is 16 Is 0.
  • the aggregation level of the EPDCCH (ie, the number of ECCEs occupied by each EPDCCH)
  • the extension is performed to obtain an aggregation level corresponding to the EPDCCH Format of 5 or 6, as shown in Table 8 below.
  • Table 8 is another schematic table of the number of ECCEs occupied by a single EPDCCH in LTE.
  • the aggregation level corresponding to the EPDCCH format of 4 is added, including the aggregation level corresponding to the centralized transmission (ie, Localized transmission) in Case A.
  • the aggregation level corresponding to the centralized transmission in Case B is 16.
  • the aggregation level shown in Table 8 also includes the aggregation level corresponding to the EPDCCH format of 5, including the aggregation level 64 corresponding to the distributed transmission in Case A (the distributed transmission), and the aggregation corresponding to the distributed transmission in Case B. Level 32.
  • the EPDCCH needs to occupy 16 RBs in the format of the EPDCCH format of 5.
  • the aggregation level of the EPDCCH in the present application (that is, the number of ECCEs occupied by each EPDCCH)
  • the extension is performed to obtain an aggregation level corresponding to the EPDCCH Format of 6.
  • Table 9 is another schematic table of the number of ECCEs occupied by a single EPDCCH in LTE.
  • the aggregation level corresponding to the EPDCCH format is 5, including the aggregation level 32 corresponding to the centralized transmission in Case A, and Case B.
  • the centralized transmission corresponds to an aggregation level of 32.
  • the aggregation level shown in Table 9 also includes the aggregation level corresponding to the EPDCCH format of 6, including the aggregation level 128 corresponding to the distributed transmission in Case A, and the aggregation level 64 corresponding to the distributed transmission in Case B.
  • the EPDCCH needs to occupy 32 in the format of the EPDCCH format of 6. RB.
  • the implementation of the EPDCCH format may further extend the detection candidate user table (ie, the search space described in this application) in the LTE according to the foregoing extension of the EPDCCH format, and obtain a detection candidate user table as shown in Table 10 below.
  • the detection candidate user table ie, the search space described in this application
  • Table 10 shows an extended EPDCCH candidate user table.
  • the foregoing Table 10 is a set of distributed EPDCCH physical resources corresponding to one UE, and includes the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the scenario of Case1 and Case2.
  • the implementation candidate provided in the present application further expands the detection candidate user table in the Case3 scenario according to the extension of the EPDCCH format, and obtains a detection candidate user table as shown in Table 11 below, and Table 11 is another extended candidate table.
  • EPDCCH candidate user table is another extended candidate table.
  • the foregoing Table 11 is a set of distributed EPDCCH physical resources corresponding to one UE, which includes the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the Case3 scenario.
  • the detection candidate in the LTE is further extended according to the foregoing extension of the EPDCCH format.
  • the user table is expanded to obtain a detection candidate user table as shown in Table 12 below.
  • Table 12 is another extended EPDCCH candidate user table.
  • the above table 12 is a centralized EPDCCH physical resource set corresponding to one UE, and includes the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the scenario of Case1 and Case2.
  • the detection candidate user table in the LTE is extended according to the extension of the EPDCCH format, and the detection candidate user table shown in Table 13 is obtained, and the table 13 is another extended EPDCCH candidate user. table.
  • the above table 13 is a centralized EPDCCH physical resource set corresponding to one UE, which includes the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the Case3 scenario.
  • the implementation provided by the application is further configured according to the foregoing EPDCCH format, for two physical resource sets.
  • the combined application scenario (the two physical resource sets may be labeled as Xp1 and Xp2, respectively) is extended to the detection candidate user table in LTE, and the detection candidate user table shown in Table 14 is obtained, and Table 14 is the expanded other An EPDCCH candidate user table.
  • Table 14 above is the EPDCCH physical resource set of the two distributed transmissions that the UE needs to detect, including the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the scenario of Case1 and Case2. among them, The number of RBs occupied by Xp1, The number of RBs occupied by Xp2, and L is the aggregation level.
  • the detection candidate user table in the LTE is further extended for Xp1 and Xp2, and the detection candidate user table shown in Table 15 is obtained, and Table 15 is expanded.
  • Another EPDCCH candidate user table is obtained.
  • Table 15 above is a set of two distributed EPDCCH physical resources that the UE needs to detect, including the number of EPDCCH candidate users corresponding to different RB numbers under different aggregation levels.
  • the detection candidate user table in the LTE is extended for the application scenarios of the two physical resource sets (including Xp1 and Xp2), and is obtained as shown in Table 16 below.
  • the candidate user table is detected, and Table 16 is another extended EPDCCH candidate user table.
  • Table 16 above is the EPDCCH physical resource set of the two centralized transmissions that the UE needs to detect, including the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the scenario of Case1 and Case2.
  • Table 16 is the EPDCCH physical resource set of the two centralized transmissions that the UE needs to detect, including the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the scenario of Case1 and Case2.
  • the present application also expands the number of EPDCCH candidate users corresponding to each aggregation level when the RB number is 16 .
  • the LTE detection candidate user table in the application scenario (including Xp1 and Xp2) of the two physical resource sets is extended according to the extension of the foregoing EPDCCH format according to the foregoing extension of the EPDCCH format, and the following table is obtained.
  • 17 is a detection candidate user table
  • Table 17 is another extended EPDCCH candidate user table.
  • Table 17 above is the EPDCCH physical resource set of the two centralized transmissions that the UE needs to detect, including the number of EPDCCH candidate users corresponding to different RB numbers under different aggregation levels.
  • the detection candidate user table in the LTE is extended according to the application scenario of the two physical resource sets (including Xp1 and Xp2) according to the extension of the EPDCCH format, and is obtained as shown in Table 18 below.
  • the candidate user table is detected, and Table 18 is another extended EPDCCH candidate user table.
  • the data transmission mode corresponding to Xp1 is centralized transmission, and the data transmission mode corresponding to Xp2 is distributed transmission.
  • Table 18 above is a set of two centralized and distributed physical resources that the UE needs to detect, where a set of EPDCCH physical resources corresponding to Xp1 for centralized transmission, A set of EPDCCH physical resources corresponding to Xp2 for distributed transmission.
  • the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the scenarios of Case1 and Case2. among them, The number of RBs for Xp1, It is the number of RBs of Xp2, and L is an aggregation level.
  • the detection candidate user table in the LTE is extended according to the application scenario of the two physical resource sets (including Xp1 and Xp2) according to the extension of the EPDCCH format, and is obtained as shown in Table 19 below.
  • the candidate user table is detected, and Table 19 is another extended EPDCCH candidate user table.
  • the data transmission mode corresponding to Xp1 is centralized transmission, and the data transmission mode corresponding to Xp2 is distributed transmission.
  • Table 19 is a set of two centralized and distributed physical resources that the UE needs to detect, where a set of EPDCCH physical resources corresponding to Xp1 for centralized transmission, A set of EPDCCH physical resources corresponding to Xp2 for distributed transmission.
  • the number of EPDCCH candidate users corresponding to different RB numbers in different aggregation levels in the Case3 scenario. among them, The number of RBs for Xp1, It is the number of RBs of Xp2, and L is an aggregation level.
  • the UE may use the physical resource type (including centralized transmission or distributed transmission) occupied by the EPDCCH configured by the base station, the number of physical resource sets (one or two), and the current cyclic prefix. And the case type corresponding to the subframe, and the application scenario applicable to each detection candidate user table in Table 6 to Table 19 above, and the target detection candidate user table applicable to the current scenario of the UE is selected.
  • the UE can be based on Determining, by the base station, the number of RBs occupied by the EPDCCH, and the aggregation level supported by the UE, determining a corresponding EPDCCH candidate user (ie, a blind detection search space) from the target detection candidate user table, and performing the EPDCCH candidate user on the EPDCCH candidate user A blind check is performed to obtain the DCI delivered by the base station.
  • a corresponding EPDCCH candidate user ie, a blind detection search space
  • the application can extend the EPDCCH detection candidate user set, expand the number of RBs occupied by the EPDCCH, and the aggregation level supported by the UE, and further expand the EPDCCH candidate user set, expand the channel coverage of the EPDCCH, and improve the channel coverage gain of the EPDCCH.
  • FIG. 9 is a schematic structural diagram of a terminal provided by the present application.
  • the terminal provided by the application may include:
  • the determining module 91 is configured to determine a predefined search space according to an aggregation level supported by the terminal, where the predefined search space includes a search space corresponding to at least one of the aggregation level 16 and the aggregation level 24.
  • the searching module 92 is configured to perform a blind check on the predefined search space determined by the determining module to obtain downlink control information DCI.
  • the aggregation level supported by the terminal includes an aggregation level of 16;
  • the predefined search space includes a common search space size corresponding to the aggregation level 16 and a terminal-specific search space size, and a number of physical downlink control channel PDCCH candidates corresponding to the common search space size, and the terminal-specific search space.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the terminal-specific search space size is 1.
  • the aggregation level supported by the terminal includes an aggregation level 24;
  • the predefined search space includes a common search space size corresponding to the aggregation level 24 and a terminal-specific search space size, and a number of PDCCH candidates corresponding to the common search space size and a size of the terminal-specific search space. Number of PDCCH candidates;
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the terminal-specific search space size is 1.
  • the aggregation levels supported by the foregoing terminal include aggregation levels 16 and 24;
  • the predefined search space includes a common search space size and a terminal-specific search space size corresponding to the aggregation levels 16 and 24, and a number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation levels 16 and 24.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 16 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 16 is 1.
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 24 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 24, and the aggregation level 24 corresponds to the terminal.
  • the number of PDCCH candidates corresponding to the search space size is 1.
  • the aggregation levels supported by the foregoing terminal include aggregation levels 16 and 24;
  • the predefined search space includes a common search space size and a terminal-specific search space size corresponding to the aggregation levels 16 and 24, and a number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation levels 16 and 24.
  • the common search space size corresponding to the aggregation level 16 is 16, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 16 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 16 is 32, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 16 is 2;
  • the common search space size corresponding to the aggregation level 24 is 24, and the number of PDCCH candidates corresponding to the common search space size corresponding to the aggregation level 24 is 1.
  • the terminal-specific search space size corresponding to the aggregation level 24 is 48, and the number of PDCCH candidates corresponding to the terminal-specific search space size corresponding to the aggregation level 24 is 2.
  • the foregoing terminal further includes:
  • the sending module 93 is configured to report, to the base station, at least one aggregation level supported by the terminal;
  • the DCI is carried on a physical resource corresponding to an aggregation level N in the at least one aggregation level.
  • the determining module 91 is further configured to:
  • the above sending module 93 is used to:
  • Searching for an aggregation level supported by the terminal from the aggregation level supported by the cell and selecting at least one aggregation level from the aggregation levels supported by the terminal, and reporting the selected at least one aggregation level to the base station .
  • FIG. 10 is another schematic structural diagram of a terminal provided by the present application.
  • the terminal provided by the application includes:
  • a determining module 101 configured to determine, according to the number of resource blocks RB occupied by the enhanced physical downlink control channel EPDCCH and an aggregation level supported by the terminal, a blind search space of the terminal from a predefined search space, where the Defining the search space includes a search space corresponding to the number of RBs being 16.
  • the searching module 102 is configured to perform blind detection on the blind detection search space determined by the determining module to acquire downlink control information DCI.
  • the predefined search space described above includes data as shown in any of the above Tables 10 through 19.
  • the predefined search space further includes a search space corresponding to the number of RBs of 32, and the aggregation level corresponding to the number of RBs is 32.
  • FIG. 11 is another schematic structural diagram of a terminal provided by the present application.
  • the terminal provided by the application includes:
  • the sending module 111 is configured to report, to the base station, at least one aggregation level supported by the terminal, where the at least one aggregation level includes an aggregation level N.
  • the search module 112 is configured to perform blind detection on the downlink control information DCI delivered by the base station according to each aggregation level in the at least one aggregation level reported by the sending module.
  • the merging module 113 is configured to perform, in the search module, two physical downlink control according to the aggregation level N When two identical DCIs on the channel PDCCH physical resource are blindly detected, the two identical DCIs are combined into the frequency domain data.
  • the search module 112 is further configured to perform blind detection on the result of combining the frequency domain data by the merging module according to the aggregation level N to obtain the DCI delivered by the base station.
  • the sending module 111 is further configured to:
  • the message is provided to the base station for determining whether to repeatedly send the DCI of the terminal on two PDCCH physical resources of the aggregation level N.
  • FIG. 12 is a schematic structural diagram of a base station provided by the present application.
  • the base station provided by the application includes:
  • the receiving module 121 is configured to receive at least one aggregation level supported by the terminal reported by the terminal, where the at least one aggregation level includes an aggregation level N.
  • the processing module 122 is configured to split the downlink control information DCI for controlling the terminal into a first DCI and a second DCI.
  • the sending module 123 is configured to send the first DCI and the second DCI processed by the processing module to the terminal;
  • the first DCI and the second DCI are respectively carried on the two different physical downlink control channel PDCCH physical resources corresponding to the aggregation level N, where the first DCI and the second CDI are used for the terminal to perform the joint Parsing; the N is a natural number.
  • the receiving module 121 is further configured to:
  • the processing module 122 is further configured to:
  • FIG. 13 is a schematic structural diagram of a terminal provided by the present application.
  • the terminal provided by the application may include:
  • the sending module 131 is configured to report, to the base station, at least one aggregation level supported by the terminal, where the at least one aggregation level includes an aggregation level N.
  • the search module 132 is configured to perform blind detection on the downlink control information DCI delivered by the base station according to each aggregation level in the at least one aggregation level.
  • the processing module 133 is configured to: when the search module performs blind detection on the first DCI and the second DCI that are carried on the physical resources of the physical downlink control channel PDCCH according to the aggregation level N, the first The DCI and the second DCI are jointly assembled to obtain the DCI delivered by the base station.
  • the sending module 131 is further configured to:
  • FIG. 14 is another schematic structural diagram of a terminal provided by the present application.
  • the terminal provided by the present application may include a memory 141, a processor 142, and a transceiver 143, wherein the memory 141 and the processor 142 and the transceiver 143 may be connected by a bus.
  • the memory 141 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), and an erasable programmable read only memory (erasable programmable read only). Memory, EPROM), or a compact disc read-only memory (CD-ROM) for storing associated program code or data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read only memory
  • CD-ROM compact disc read-only memory
  • the processor 142 may be one or more central processing units (CPUs). In the case where the processor 142 is a CPU, the CPU may be a single core CPU or a multi-core CPU.
  • the processor 142 and the transceiver 143 are used to read the program code stored in the memory 141, and the implementation of the terminal described in any of the foregoing embodiments is performed, and details are not described herein.
  • FIG. 15 is another schematic structural diagram of a base station provided by the present application.
  • the base station provided by the present application may include a memory 151, a processor 152, and a transceiver 153, wherein the memory 151, the processor 152, and the transceiver 153 may be connected by a bus.
  • the memory 151 includes, but is not limited to, a RAM, a ROM, an EPROM, and a CD-ROM for storing related program codes or data.
  • the processor 152 may be one or more CPUs.
  • the CPU may be a single core CPU or a multi-core CPU.
  • the processor 152 and the transceiver 153 are used to read the program code stored in the memory 151, and the implementation of the base station described in any of the foregoing embodiments is performed, and details are not described herein.
  • the cell and the aggregation level supported by the terminal can be extended to the aggregation level 16 or 24.
  • the base station can adapt the DCI sent to the UE to a larger physical resource, if the information bits are unchanged.
  • the PDCCH transmission code rate is reduced to obtain the PDCCH coverage gain, which can improve the downlink coverage gain, improve the diversity of the implementation of the downlink coverage enhancement, and have higher applicability.
  • the present application may further extend the EPDCCH detection candidate user set, expand the number of RBs occupied by the EPDCCH, and the aggregation level supported by the UE, and further expand the EPDCCH candidate user set, expand the channel coverage of the EPDCCH, and improve the channel coverage gain of the EPDCCH. .
  • the base station may send the DCI of the UE on the same TTI in two different PDCCH physical resources, that is, the base station may repeatedly send the DCI of the UE twice on the same TTI, and pass the frequency domain. Data is combined to achieve higher coverage gain, easier to operate, and more adaptable.
  • the base station allocates two DCNs of the aggregation level (that is, candidate CCE resources) to the DCI to be transmitted, which is equivalent to halving the information bits carried by the candidate user CCE resources of each aggregation level N. In essence, the transmission rate is reduced, the coverage rate is exchanged by the code rate, and the diversity of the implementation of the coverage enhancement is increased, and the applicability is stronger.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本申请提供一种下行链路控制信息的获取方法及装置，所述方法包括：终端根据其支持的聚合等级确定预定义搜索空间，所述预定义搜索空间包括聚合等级16和聚合等级24中的至少一种聚合等级对应的搜索空间；所述终端在所述预定义搜索空间上进行盲检以获取下行链路控制信息DCI。所述方法还包括：终端根据增强物理下行控制信道EPDCCH所占用的资源块RB数目以及所述终端所支持的聚合等级，从预定义搜索空间中确定出所述终端的盲检搜索空间，所述预定义搜索空间包括所述RB数目为16所对应的搜索空间；所述终端在所述盲检搜索空间上进行盲检以获取下行链路控制信息DCI。采用本申请，具有可提高下行覆盖的增益，提高下行覆盖增强的实现方式多样性。

Description

一种下行链路控制信息的处理方法及装置 技术领域
本发明涉及通信技术领域，尤其涉及一种下行链路控制信息的处理方法及装置。
背景技术
当前随着长期演进(英文：Long Term Evolution，LTE)应用的日益普及，越来越多的应用场景需要实现信号的深度覆盖，即需要增强小区边缘用户的信号覆盖以便用户获取其所需的控制信息。LTE覆盖增强技术中包括上行覆盖增强技术和下行覆盖增强技术，其中，下行覆盖增强技术包括提高输出功率或者增加发送天线个数等。LTE小站是一种具有可快速部署、易安装以及体积小等特点的小基站，基于LTE小站的应用也越来越广。然而，在LTE小站的应用场景中，LTE小站的下行发送功率与终端最大发送功率相关，无法通过提高输出功率实现下行覆盖增强。LTE小站体积小也无法通过增加天线个数的方式实现下行覆盖增强，因此下行覆盖增强成为当前LTE小站中亟待解决的技术问题之一。
LTE R13标准中引入了物联网的应用场景(英文：eMTC)的标准。为了实现下行覆盖增强，eMTC采用MTC(Machine Type Communication)物理下行控制信道(英文：MTC Physical Downlink Control Channel，MPDCCH)。支持MPDCCH的接收端通过时域数据合并获取覆盖增益。然而，目前大多数终端不支持MPDCCH，若需要采用MPDCCH的方式获取覆盖增强则需要对终端的硬件结构进行重新设计，操作难度大，适应性低。
此外，为了实现下行覆盖增强，现有技术还采用类似于上行覆盖增强技术中的传输时间间隔绑定(英文：Transmission time interval bundling，TTI Bundling)技术的方法实现下行覆盖增强。下行发送端通过多个TTI重复发送数据，接收端通过将发送端重复发送的数据进行合并处理以实现数据的解调，以此获取覆盖增益。现有技术采用时域重复的方式获取覆盖增益的同时也大大增加了***的数据处理时延，降低了***的吞吐率。同时，时域重复的方式还需要考虑混合自动重传请求(英文：Hybrid Automatic Repeat reQuest，HARQ)的时序设计，实现复杂度高，适应性低。
发明内容
本申请提供了一种下行链路控制信息的处理方法及装置，可提高下行覆盖的增益，提高下行覆盖增强的实现方式多样性。
第一方面，提供了一种下行链路控制信息的获取方法，其可包括：
终端根据其支持的聚合等级确定预定义搜索空间，所述预定义搜索空间包括聚合等级16和聚合等级24中的至少一种聚合等级对应的搜索空间；
所述终端在所述预定义搜索空间上进行盲检以获取下行链路控制信息DCI。
可选的，所述终端支持的聚合等级中包括聚合等级16；
所述预定义搜索空间中包括所述聚合等级16对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的物理下行控制信道PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
所述聚合等级16对应的公共搜索空间大小为16，所述公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为16，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
可选的，所述终端支持的聚合等级中包括聚合等级24；
所述预定义搜索空间中包括所述聚合等级24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
所述聚合等级24对应的公共搜索空间大小为24，所述公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为24，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
可选的，所述终端支持的聚合等级中包括聚合等级16和24；
所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为16，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为24，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为1。
可选的，所述终端支持的聚合等级中包括聚合等级16和24；
所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为32，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为2；
所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为48，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为2。
可选的，所述终端根据其支持的聚合等级确定预定义搜索空间之前，所述方法还包括：
终端向基站上报所述终端支持的至少一个聚合等级；
其中，所述DCI承载在所述至少一个聚合等级中的聚合等级N对应的物理资源上。
可选的，所述终端向基站上报所述终端支持的至少一个聚合等级之前，所述方法还包括：
终端获取基站的广播消息，根据所述广播消息确定所述终端所处小区支持的聚合等级；
所述终端向基站上报所述终端支持的至少一个聚合等级包括：
所述终端从所述小区支持的聚合等级中查找其所支持的聚合等级，并从其所支持的聚合等级中选择至少一个聚合等级，将选择的所述至少一个聚合等级上报给所述基站。
在本申请中，小区以及终端支持的聚合等级可扩展到聚合等级16或者24上，基站可将下发给UE的DCI适配到更大的物理资源上，在信息比特不变的情况下，降低了PDCCH传输码率用以获取PDCCH覆盖增益。基站下发DCI给UE时，不再是直接根据小区支持的聚合等级确定用于承载DCI信息的物理资源所对应的聚合等级，而是从UE所支持的聚合等级中选择某个聚合等级，将下发给终端的DCI信息承载在该聚合等级对应的物理资源上下发给UE，操作更灵活，关联性更强，适用性更高。终端做PDCCH盲检时，只需要对其上报的各个聚合等级对应的搜索空间进行盲检，无需对小区支持的所有聚合等级或者其支持的所有聚合等级对应的搜索空间进行盲检，降低了DCI信息的处理复杂度，可提高DCI信息的处理效率。
第二方面提供了一种下行链路控制信息的获取方法，其可包括：
终端根据增强物理下行控制信道EPDCCH所占用的资源块RB数目以及所述终端所支持的聚合等级，从预定义搜索空间中确定出所述终端的盲检搜索空间，所述预定义搜索空间包括所述RB数目为16所对应的搜索空间；
所述终端在所述盲检搜索空间上进行盲检以获取下行链路控制信息DCI。
可选的，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表1：
表1
Figure PCTCN2017072747-appb-000001
其中，所述
Figure PCTCN2017072747-appb-000002
为所述终端占用的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表2：
表2
Figure PCTCN2017072747-appb-000003
其中，所述
Figure PCTCN2017072747-appb-000004
为所述终端占用的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表3：
表3
Figure PCTCN2017072747-appb-000005
其中，所述
Figure PCTCN2017072747-appb-000006
为所述终端占用的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表4：
表4
Figure PCTCN2017072747-appb-000007
其中，所述
Figure PCTCN2017072747-appb-000008
为所述终端占用的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表5：
表5
Figure PCTCN2017072747-appb-000009
其中，所述
Figure PCTCN2017072747-appb-000010
为所述终端占用的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表6：
表6
Figure PCTCN2017072747-appb-000011
其中，所述
Figure PCTCN2017072747-appb-000012
为所述终端占用的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000014
如下表7：
表7
Figure PCTCN2017072747-appb-000015
其中，所述
Figure PCTCN2017072747-appb-000016
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000017
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000018
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000019
如下表8：
表8
其中，所述
Figure PCTCN2017072747-appb-000021
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000022
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000023
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000024
如下表9：
表9
Figure PCTCN2017072747-appb-000025
其中，所述
Figure PCTCN2017072747-appb-000026
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000027
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000028
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000029
如下表10：
表10
Figure PCTCN2017072747-appb-000030
其中，所述
Figure PCTCN2017072747-appb-000031
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000032
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000033
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000034
如下表11：
表11
Figure PCTCN2017072747-appb-000035
其中，所述
Figure PCTCN2017072747-appb-000036
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000037
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000038
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000039
如下表12：
表12
Figure PCTCN2017072747-appb-000040
其中，所述
Figure PCTCN2017072747-appb-000041
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000042
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000043
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000044
如下表13：
表13
Figure PCTCN2017072747-appb-000045
其中，所述
Figure PCTCN2017072747-appb-000046
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000047
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000048
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000049
如下表14：
表14
Figure PCTCN2017072747-appb-000050
其中，所述
Figure PCTCN2017072747-appb-000051
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000052
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000053
和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000054
如下表15：
表15
Figure PCTCN2017072747-appb-000055
其中，所述
Figure PCTCN2017072747-appb-000056
为所述Xp1的RB数目，所述
Figure PCTCN2017072747-appb-000057
为所述Xp2的RB数目，所述L为聚合等级。
可选的，所述预定义搜索空间还包括所述RB数目为32所对应的搜索空间，所述RB数目为32所对应的聚合等级包括128。
本申请可对EPDCCH检测候选用户集进行扩展，可扩展EPDCCH所占用的RB数目以及UE支持的聚合等级，进而可扩展EPDCCH候选用户集，可扩展EPDCCH的信道覆盖范围，提高EPDCCH的信道覆盖增益。
第三方面提供了一种下行链路控制信息的获取方法，其可包括：
终端向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
所述终端按照所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检；
所述终端按照所述聚合等级N对承载在两份物理下行控制信道PDCCH物理资源上的两个相同的DCI均盲检错误，则将所述两个相同的DCI进行频域数据合并；
所述终端按照所述聚合等级N对所述频域数据合并的结果进行盲检以获取所述基站下发的DCI。
可选的，所述终端向基站上报所述终端支持的至少一个聚合等级之前，所述方法还包括：
所述终端向所述基站上报所述终端具备频域数据合并能力的消息；
其中，所述消息提供给所述基站用于确定是否在所述聚合等级N的两份PDCCH物理 资源上重复发送所述终端的DCI。
第四方面提供了一种下行链路控制信息的下发方法，其可包括：
基站接收终端上报的所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
所述基站将用于控制所述终端的下行链路控制信息DCI拆分为第一DCI和第二DCI；
所述基站将所述第一DCI和所述第二DCI发送给所述终端；
所述第一DCI和所述第二DCI分别承载在所述聚合等级N对应的两个不同的物理下行控制信道PDCCH物理资源上，所述第一DCI和第二CDI用于所述终端进行联合解析；所述N为自然数。
可选的，所述方法还包括：所述基站接收所述终端上报的消息，根据所述消息确定所述终端具备频域数据合并能力。
可选的，在所述基站将所述终端的DCI拆分为第一DCI和第二DCI之前，所述方法还包括：
所述基站确定所述终端具备频域数据合并能力，包括：
所述基站获取所述终端的物理随机接入信道的前导码，根据所述前导码确定所述终端具备频域数据合并能力。
在本申请中，基站可在同一个TTI上在两份不同的PDCCH物理资源上下发UE的DCI，即，基站可在同一个TTI上重复下发两次UE的DCI，通过频域数据合并来获取更高的覆盖增益，操作更简单，适用性高。
第五方面提供了一种下行链路控制信息的获取方法，其可包括：
终端向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
所述终端按照所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检；
若所述终端按照所述聚合等级N上对承载在两份物理下行控制信道PDCCH物理资源上的第一DCI和第二DCI均盲检正确，则将所述第一DCI和所述第二DCI进行联合组装以得到所述基站下发的DCI。
可选的，所述方法还包括：
所述终端向所述基站上报所述终端具备频域数据合并能力的消息。
在本申请中，基站将待传输的DCI分配了两个聚合级别为N的候选物理资源(即候选CCE资源)上，相当于每个聚合级别为N的候选用户CCE资源承载的信息比特减半，实质上也是降低传输码率，通过码率换取覆盖增益，增加了覆盖增强的实现方式的多样性，适用性更强。
第六方面提供了一种终端，其可包括：
确定模块，用于根据终端支持的聚合等级确定预定义搜索空间，所述预定义搜索空间包括聚合等级16和聚合等级24中的至少一种聚合等级对应的搜索空间。
搜索模块，用于在所述确定模块确定的所述预定义搜索空间上进行盲检以获取下行链路控制信息DCI。
可选的，所述终端支持的聚合等级中包括聚合等级16；
所述预定义搜索空间中包括所述聚合等级16对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的物理下行控制信道PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
所述聚合等级16对应的公共搜索空间大小为16，所述公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为16，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
可选的，所述终端支持的聚合等级中包括聚合等级24；
所述预定义搜索空间中包括所述聚合等级24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
所述聚合等级24对应的公共搜索空间大小为24，所述公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为24，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
可选的，所述终端支持的聚合等级中包括聚合等级16和24；
所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为16，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为24，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为1。
可选的，所述终端支持的聚合等级中包括聚合等级16和24；
所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为32，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为2；
所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为48，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为2。
可选的，所述终端还包括：
发送模块，用于向基站上报所述终端支持的至少一个聚合等级；
其中，所述DCI承载在所述至少一个聚合等级中的聚合等级N对应的物理资源上。
可选的，所述确定模块还用于：
获取基站的广播消息，根据所述广播消息确定所述终端所处小区支持的聚合等级；
所述发送模块用于：
从所述小区支持的聚合等级中查找所述终端所支持的聚合等级，并从所述终端所支持的聚合等级中选择至少一个聚合等级，将选择的所述至少一个聚合等级上报给所述基站。
第七方面提供了一种终端，其可包括：
确定模块，用于根据增强物理下行控制信道EPDCCH所占用的资源块RB数目以及所述终端所支持的聚合等级，从预定义搜索空间中确定出所述终端的盲检搜索空间，所述预定义搜索空间包括所述RB数目为16所对应的搜索空间；
搜索模块，用于在所述确定模块确定的所述盲检搜索空间上进行盲检以获取下行链路控制信息DCI。
可选的，所述预定义搜索空间包括如上述表1至表15任一项所示数据。
可选的，所述预定义搜索空间还包括所述RB数目为32所对应的搜索空间，所述RB数目为32所对应的聚合等级包括128。
第八方面提供了一种终端，其可包括：
发送模块，用于向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
搜索模块，用于按照所述发送模块上报的所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检；
合并模块，用于在所述搜索模块按照所述聚合等级N对承载在两份物理下行控制信道PDCCH物理资源上的两个相同的DCI均盲检错误时，将所述两个相同的DCI进行频域数据合并；
所述搜索模块，还用于按照所述聚合等级N对所述合并模块合并所述频域数据的结果进行盲检以获取所述基站下发的DCI。
可选的，所述发送模块还用于：
向所述基站上报所述终端具备频域数据合并能力的消息；
其中，所述消息提供给所述基站用于确定是否在所述聚合等级N的两份PDCCH物理资源上重复发送所述终端的DCI。
第九方面提供了一种基站，其可包括：
接收模块，用于接收终端上报的所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
处理模块，用于将用于控制所述终端的下行链路控制信息DCI拆分为第一DCI和第二DCI；
发送模块，用于将所述处理模块处理得到的所述第一DCI和所述第二DCI发送给所述终端；
所述第一DCI和所述第二DCI分别承载在所述聚合等级N对应的两个不同的物理下行控制信道PDCCH物理资源上，所述第一DCI和第二CDI用于所述终端进行联合解析；所述N为自然数。
可选的，所述基站还包括：
接收模块，用于接收所述终端上报的消息，根据所述消息确定所述终端具备频域数据合并能力。
可选的，所述处理模块还用于：
获取所述终端的物理随机接入信道的前导码，根据所述前导码确定所述终端具备频域数据合并能力。
第十方面提供了一种终端，其可包括：
发送模块，用于向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
搜索模块，用于按照所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检；
处理模块，用于在所述搜索模块按照所述聚合等级N上对承载在两份物理下行控制信道PDCCH物理资源上的第一DCI和第二DCI均盲检正确时，将所述第一DCI和所述第二DCI进行联合组装以得到所述基站下发的DCI。
可选的，所述发送模块，还用于：
向所述基站上报所述终端具备频域数据合并能力的消息。
第十一方面提供了一种终端，其可包括：存储器、处理器和收发器；
所述存储器用于存储一组程序代码；
所述处理器和收发器用于调用所述存储器中存储的程序代码执行上述第一方面、第二方面、第三方面以及第五方面所描述的方法。
第十二方面提供了一种基站，其可包括：存储器、处理器和收发器；
所述存储用于存储一组程序代码；
所述处理器和收发器用于调用所述存储器中存储的程序代码执行上述第四方面所描述的方法。
在本申请中，小区以及终端支持的聚合等级可扩展到聚合等级16或者24上，基站可将下发给UE的DCI适配到更大的物理资源上，在信息比特不变的情况下，降低了PDCCH传输码率用以获取PDCCH覆盖增益，可提高下行覆盖的增益，提高下行覆盖增强的实现方式多样性，适用性更高。进一步的，本申请还可对EPDCCH检测候选用户集进行扩展，可扩展EPDCCH所占用的RB数目以及UE支持的聚合等级，进而可扩展EPDCCH候选用户集，可扩展EPDCCH的信道覆盖范围，提高EPDCCH的信道覆盖增益。
附图说明
为了更清楚地说明本申请中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请提供的LTE通信***的架构示意图；
图2是本申请提供的下行链路控制信息的处理方法的一流程示意图；
图3是本申请提供的下行链路控制信息的处理方法的另一流程示意图；
图4是本申请提供的频域数据合并的图案；
图5是本申请提供的频域数据合并的一示意图；
图6是本申请提供的频域数据合并的另一示意图；
图7是本申请提供的下行链路控制信息的处理方法的另一流程示意图；
图8是本申请提供的DCI联合组装的示意图；
图9是本申请提供的终端的一结构示意图；
图10是本申请提供的终端的另一结构示意图；
图11是本申请提供的终端的另一结构示意图；
图12是本申请提供的基站的结构示意图；
图13是本申请提供的终端的结构示意图；
图14是本申请提供的终端的另一结构示意图；
图15是本申请提供的基站的另一结构示意图。
具体实施方式
本申请提供的下行链路控制信息的处理方法适用于LTE通信***。如图1是本申请提供的LTE通信***的架构示意图。本申请提供的LTE***包括终端(即用户设备，英文：User Equipment，UE)、基站(eNodeB)和网络节点等。其中，上述网络节点可包括移动管理实体(英文：Mobility Management Entity，MME)或者服务网关(英文：Serving GateWay，S-GW)等。具体实现中，上述UE与基站可通过Uu接口进行数据交互，基站与基站之间可通过X2接口进行数据交互，基站与网络节点之间可通过S1接口进行数据交互。需要说明的是，上述UE、基站与网络节点之间进行数据交互的连接方式仅是举例，具体可根据实际应用场景确定，在此不做限制。本申请提供的实现方式中包含的数据传输主要为基站与UE之间的数据传输，基站可向UE发送下行数据，UE可接收基站下发的数据或者向基站发送上行数据。下面将结合图2至图15对本申请提供的下行链路控制信息的处理方法及装置进行描述。
参见图2，是本申请提供的下行链路控制信息的处理方法的一流程示意图。本申请提供的方法包括步骤：
S21、UE向基站上报UE其所支持的聚合等级。
在一些可行的实施方式中，本申请可扩展物理下行控制信道(英文：Physical Downlink Control Channel，PDCCH)信道，将控制信道单元(英文：Control Channel Element，CCE)聚合等级扩展到16或者24。UE所支持的CCE聚合等级(以下简称聚合等级)可由原来 的1、2、4、8扩展到1、2、4、8和16，或者1、2、4、8和24，或者1、2、4、8、16和24。在现有实现方式中，UE所支持的聚合等级为四个(即聚合等级1、2、4和8)，在本申请中，UE所支持的聚合等级可为五个(即比现有实现方式多出一个，如16或者24)或者六个(即比现有实现方式多出两个，即16和24)。
在一些可行的实施方式中，UE可根据其所处位置(即UE所处小区)的信道条件，确定在当前所处位置UE所支持的一个或者多个聚合等级。其中，上述一个或者多个聚合等级可为UE所支持的五个聚合等级中的一个或者多个，也可为UE所支持的六个聚合等级中的一个或者多个。例如，假设在理想信道条件下，UE可支持1、2、4、8、16和24等六个聚合等级，在当前UE所处位置的信道条件下，UE所支持的聚合等级可包括2、8和16，或者1、4和24等三个聚合等级。UE可将当前所处位置的信道条件下其所支持的一个或者多个聚合等级上报给基站，或者将当前所处位置的信道条件下其不支持的一个或者多个聚合等级上报给基站。
在一些可行的实施方式中，基站也可广播UE所处小区所支持的聚合等级。UE获取到基站的广播消息之后，可根据广播消息确定UE所处小区支持的聚合等级。进一步的，UE可根据其自身的PDCCH盲检能力，从小区支持的多个聚合等级中选择其所支持的聚合等级，进而可从其支持的聚合等级中选择一个或者多个上报给基站。例如，基站广播小区所支持的聚合等级包括1、2、4、8、16和24等六个聚合等级，UE的PDCCH盲检能力决定着其所支持的聚合等级包括1、4、8、16和24等五个聚合等级。UE确定了小区所支持的聚合等级之后可从中查找其所支持的聚合等级(即1、4、8、16和24)，并从其所支持的聚合等级选择一个或者多个聚合等级(如4、16和24)上报给基站。
具体实现中，基站可通过不同的搜索空间列表记录不同场景下小区支持的各个聚合等级对应的搜索空间(即预定义搜索空间)。例如，当小区支持的聚合等级包括1、2、4、8和16时，可通过一个搜索空间列表记录所有聚合等级对应的搜索空间。基站可广播该搜索空间列表的索引(如Tab#1)，UE可根据该索引查找该搜索空间列表，进而可确定其所处小区支持的聚合等级。如表1，表1为搜索空间列表的一示意表：
表1
Figure PCTCN2017072747-appb-000058
在表1中，小区支持的聚合等级可扩展到聚合等级16，其中，聚合等级16对应的公共搜索空间大小为16，该公共搜索空间大小对应的PDCCH候选数目为1。聚合等级16对应的UE专用搜索空间大小为16，该UE专用搜索空间大小对应的PDCCH候选数目为1。需要说明的是，在本申请中，公共搜索空间大小和专用搜索空间大小指代的是CCE的个数，例如，公共搜索空间大小为16表示该公共搜索空间为16个CCE，专用搜索空间为16表示该专用搜索空间为16个CCE。下面不再赘述。
当小区支持的聚合等级包括1、2、4、8和24时，可通过另一个搜索空间列表记录所有聚合等级对应的搜索空间。基站可广播该搜索空间列表的索引(如Tab#2)，UE可根据该索引查找该搜索空间列表，进而可确定其所处小区支持的聚合等级。如表2，表2为搜索空间列表的另一示意表：
表2
Figure PCTCN2017072747-appb-000059
在表2中，小区支持的聚合等级可扩展到聚合等级24，其中，聚合等级24对应的公共搜索空间大小为24，该公共搜索空间大小对应的PDCCH候选数目为1。聚合等级24对应的UE专用搜索空间大小为24，该UE专用搜索空间大小对应的PDCCH候选数目为1。
当小区支持的聚合等级包括1、2、4、8、16和24时，可通过另一个搜索空间列表记录所有聚合等级对应的搜索空间。基站可广播该搜索空间列表的索引(如Tab#3)，UE可根据该索引查找该搜索空间列表，进而可确定其所处小区支持的聚合等级。如表3，表3为搜索空间列表的另一示意表：
表3
Figure PCTCN2017072747-appb-000060
在表3中，小区支持的聚合等级可扩展到聚合等级16和24，其中，聚合等级16对应的公共搜索空间大小为16，该公共搜索空间大小对应的PDCCH候选数目为1。聚合等级16对应的UE专用搜索空间大小为16，该UE专用搜索空间大小对应的PDCCH候选数目为1。聚合等级24对应的公共搜索空间大小为24，该公共搜索空间大小对应的PDCCH候选数目为1。聚合等级24对应的UE专用搜索空间大小为24，该UE专用搜索空间大小对应的PDCCH候选数目为1。
进一步的，当小区支持的聚合等级包括1、2、4、8、16和24时，还可通过另一个搜索空间列表记录所有聚合等级对应的搜索空间。基站可广播该搜索空间列表的索引(如Tab#4)，UE可根据该索引查找该搜索空间列表，进而可确定其所处小区支持的聚合等级。如表4，表4为搜索空间列表的另一示意表：
表4
Figure PCTCN2017072747-appb-000061
在表4中，小区支持的聚合等级可扩展到聚合等级16和24。其中，聚合等级16对应的公共搜索空间大小为16，该公共搜索空间大小对应的PDCCH候选数目为1。聚合等级16对应的UE专用搜索空间大小为16，该UE专用搜索空间大小对应的PDCCH候选数目为2。聚合等级24对应的公共搜索空间大小为24，该公共搜索空间大小对应的PDCCH候选数目为1。聚合等级24对应的UE专用搜索空间大小为24，该UE专用搜索空间大小对应的PDCCH候选数目为2。
具体实现中，UE根据基站广播的搜索空间列表的索引查找得到相应的搜索空间列表之后，可根据搜索空间列表中记录的信息确定小区支持的聚合等级之后，进而可从中选择自己支持的聚合等级，并从中选择一个或者多个上报给基站。UE盲检则只需要盲检自己支持的聚合等级，不支持的聚合等级则不做盲检，可减少盲检的处理复杂度，提高DCI信息的处理效率。
S22、基站根据UE所上报的聚合等级，将UE所需的DCI承载在UE上报的至少一个聚合等级中的聚合等级N对应的物理资源上，并下发给UE。
在一些可行的实施方式中，UE向基站上报自己支持的聚合等级之后，基站则可根据UE所上报的聚合等级，将UE所需的DCI承载在UE上报的多个聚合等级中的某一个聚合等级(如聚合等级N)对应的物理资源上，通过该物理资源将DCI信息下发给UE。即，在本申请中，UE所支持的聚合等级可扩展到聚合等级16或者24上，基站可将下发给UE的DCI适配到更大的物理资源上，在信息比特不变的情况下，降低了PDCCH传输码率用以获取PDCCH覆盖增益。
需要说明的是，在本申请中，基站下发DCI给UE时，不再是直接根据小区支持的聚合等级确定用于承载DCI信息的物理资源所对应的聚合等级，而是从UE上报的聚合等级中选择某个聚合等级，将下发给DCI的信息承载在该聚合等级对应的物理资源上下发给UE，操作更灵活，关联性更强，适用性更高。
S23、UE按照其所支持的各个聚合等级，在预定义搜索空间上进行PDCCH盲检以获取上述基站下发的DCI。
在一些可行的实施方式中，UE上报其所支持的聚合等级中的一个或者多个给基站之后，UE做PDCCH盲检时，只需要对其上报的各个聚合等级对应的搜索空间进行盲检，无需对小区支持的所有聚合等级或者其支持的所有聚合等级对应的搜索空间进行盲检，降低了DCI信息的处理复杂度，可提高DCI信息的处理效率。其中，上述预定义搜索空间则为上述表1至表4中任一列表中包含的各个聚合等级对应的搜索空间大小和PDCCH候选数目等。
具体实现中，在不同的应用场景中，UE可根据其所上报的聚合等级从上述表1至表4中确定出相应的搜索空间列表，根据各个搜索空间列表包含的预定义搜索空间确定其所需盲检的搜索空间，进而可在确定出的搜索空间上进行PDCCH盲检。UE通过盲检获取承载在某个聚合等级(如聚合等级N)对应的物理资源上的DCI。
在本申请中，小区以及UE支持的聚合等级可扩展到聚合等级16或者24上，基站可将下发给UE的DCI适配到更大的物理资源上，在信息比特不变的情况下，降低了PDCCH传输码率用以获取PDCCH覆盖增益。基站下发DCI给UE时，不再是直接根据小区支持的聚合等级确定用于承载DCI信息的物理资源所对应的聚合等级，而是从UE上报的聚合等级中选择某个聚合等级，将下发的DCI信息承载在该聚合等级对应的物理资源上下发给UE，操作更灵活，关联性更强，适用性更高。UE做PDCCH盲检时，只需要对其上报的各个聚合等级对应的搜索空间进行盲检，无需对小区支持的所有聚合等级或者其支持的所有聚合等级对应的搜索空间进行盲检，降低了DCI信息的处理复杂度，可提高DCI信息的处理效率。
参见图3，是本申请提供的下行链路控制信息的处理方法的另一流程示意图。本申请提供的方法包括步骤：
S31、UE向基站上报UE具备频域数据合并能力。
在一些可行的实施方式中，UE可在随时接入小区网络时，向基站发送其具备频域数据合并的能力的消息，即UE支持频域数据合并。基站可根据UE上报的消息确定该UE支持频域数据合并，进而可在下发UE所需的DCI时，确定是否在两份PDCCH物理资源上重复发送UE所需的DCI。
进一步的，在一些可行的实施方式中，基站也可根据UE的物理随机接入信道(英文：Physical Random Access Channel，PRACH)的前导码确定UE具备频域数据合并的能力。其中，上述前导码为增强的前导码(即增强的Preamble)。在本申请中，增强的前导码不同于LTE已经定义的前导码，增强的前导码包括以下两方面的特征：
1、扩展Preamble用户集个数，划分“增强覆盖用户集”。
通常，现有协议中规定Preamble只需要支持64个用户。本申请可将Preamble所需支持的用户扩展为72个，其中，0～63定义为“正常覆盖用户集”，用于支持64个用户，64～71定义为“增强覆盖用户集”，用于支持8个用户。
2、增强覆盖用户的Preamble由小区指定的根指数生成。
在一些可行的实现方式中，上述小区指定的根指数为指定给增强用户使用的根指数，普通用户不能使用该根指数。基站通过检测根据该小区指定的根指数生成的前导码则识别增强用户，将普通用户与增强用户区分开来。基站检测到增强用户则可确定当前场景为需要增强的场景，进而可确定UE所需的DCI的下发方式。具体的，基站可根据检测到的前导码确定该UE支持频域数据合并，进而可在下发UE所需的DCI时，确定是否在两份PDCCH物理资源上重复发送UE所需的DCI。
S32、UE向基站上报UE支持的聚合等级。
在一些可行的实施方式中，UE可向基站上报其所支持的聚合等级。具体实现中，UE向基站上报其所支持的聚合等级，或者向基站上报其具备频域数据合并能力的先后顺序可根据实际应用场景确定，在此不做限制。其中，上述UE向基站上报的聚合等级可为其支持的所有聚合等级，也可为其支持的所有聚合等级中的部分，具体可根据实际应用场景确定，在此不做限制。
S33、基站将UE所需的DCI在两份PDCCH物理资源上下发给UE。
在一些可行的实施方式中，基站确定UE具备频域数据合并能力之后，则可将UE所需的DCI分别承载在两份PDCCH物理资源上下发。进一步的，基站可根据UE所支持的聚合等级确定用于承载UE所需的DCI的两份物理资源。具体的，基站可从UE所支持的聚合等级中选定一个聚合等级(如聚合等级8)，并将上述UE所需的DCI分别承载在聚合等级8对应的两个不同的PDCCH物理资源上，下发给UE。参见图4，是本申请提供的频域数据合并的图案。例如，假设基站从UE所支持的聚合等级中选定聚合等级8，将聚合等级8对应的PDCCH物理资源确定为用于承载UE所需的DCI的物理资源。图4所示的数字索引为聚合等级8对应的候选资源位置(包括UE-specific和Common)，候选资源位置的总数为M。其中，相同底色的候选资源可以进行合并，例如候选资源位置为0和1的两个候选资源可以进行合并，候选资源位置为M-2和M-1的两个候选资源也可以进行合并。基站确定需要在不同的PDCCH物理资源上下发UE所需的DCI时，可通过计算候选资源的起始位置，在候选资源可分配的情况下，将数字索引为n和n+1对应的候选资源确定为用于承载UE所需的DCI的物理资源。其中，n+1<＝M-1，n为偶数。
需要说明的是，基站将用于承载UE所需的DCI的物理资源设定为数字索引为n和n+1对应的候选资源位置，并限定的n和n+1的取值，可约束承载UE所需的物理资源的位置，保证UE与基站对齐，可降低数据处理的复杂度。
S34、UE按照其所支持的各个聚合等级对其所需的DCI进行盲检。
在一些可行的实施方式中，UE向基站上报其所支持的聚合等级之后，则可按照上报的聚合等级中的各个聚合等级，在各个聚合等级对应的物理资源上对其所需的DCI进行盲检。若UE按照最高聚合等级(如聚合等级8)进行盲检均盲检错误，且该终端已经上报“具备频域数据合并能力”，则UE需要按照合并图案进行合并，并对合并的后数据以最高聚合等 级再次进行新的一轮盲检。其中，上述频域数据合并可包括符号级的数据合并和比特级的数据合并。
在一些可行的实施方式中，UE可将承载在两份PDCCH物理资源上的两个相同的DCI进行同相正交(英文：in-phase quadrature，IQ)符号合并。如图5，图5是本申请提供的频域数据合并的一示意图。UE可在符号级的数据合并处理过程中，对两个相同的DCI进行解层映射和预编码之后，对预编码得到的数据进行IQ符号合并再解调，进而可进行数据的解扰和盲检等操作。
在一些可行的实施方式中，UE也可将承载在两份PDCCH物理资源上的两个相同的DCI进行对数似然比(英文：Log Likelihood Ratio，LLR)合并(或称软值合并，或者软比特合并)。如图6，图6是本申请提供的频域数据合并的另一示意图。UE可在比特级的数据合并处理过程中，在对频域数据进行解扰之后，将解扰得到的数据进行LLR合并再进行解速率匹配等比特级的盲检等处理操作。
在一些可行的实施方式中，UE对频域数据合并之后，对合并之后的数据再次进行盲检。具体实现中，若UE在聚合等级8上做频域数据合并，并对合并后的DCI进行盲检，则UE对合并后的DCI进行盲检时可等同于对聚合等级为16的物理资源上承载的信息进行盲检，进而提高了PDCCH的信道覆盖，获取了信道覆盖增益。
在本申请中，基站可在同一个TTI上在两份不同的PDCCH物理资源上下发UE所需的DCI，即，基站可在同一个TTI上重复下发两次UE所需的DCI，通过频域数据合并来获取更高的覆盖增益，操作更简单，适用性高。
参见图7，是本申请提供的下行链路控制信息的处理方法的另一流程示意图。本申请提供的方法包括步骤：
S71、UE向基站上报UE具备DCI联合解析能力。
在一些可行的实施方式中，UE向基站上报其具备DCI联合解析能力的实现方式可参见上述实施例中的步骤S31，在此不再赘述。
S72、UE向基站上报UE支持的聚合等级。
在一些可行的实施方式中，UE向基站上报其所支持的聚合等级的实现方式可参见上述实施例中的步骤S32，在此不再赘述。
S73、基站将UE所需的DCI拆分为第一DCI和第二DCI，在相同聚合等级对应的两份不同的PDCCH物理资源上下发给UE。
在一些可行的实施方式中，基站确定UE具DCI联合解析能力之后，若基站直接将UE所需的DCI下发给UE，但是没在期望收到反馈的时刻收到UE的反馈，则可确定直接下发完整的DCI给UE的方式UE无法正确解析该DCI。此时，基站可将UE所需的DCI拆分为两部分的DCI，包括第一DCI和第二DCI。进一步的，基站可将拆分得到的第一DCI和第二DCI分别承载在两份物理资源上独立下发给UE，其中，上述两份物理资源对应同一个聚合等级(例如聚合等级8)，降低了传输码率，进而可通过降低传输码率换取覆盖增益。
S74、UE按照其所支持的各个聚合等级对其所需的DCI进行盲检，并对盲检得到的两份DCI信息进行联合组装。
在一些可行的实施方式中，若UE在各个聚合等级对应的物理资源上进行盲检，并且在相同聚合等级(如聚合等级8)对应的两份物理资源上均盲检正确，则可将盲检正确的两份相同Format的DCI(即第一DCI和第二DCI)进行联合组装，获取其所需的DCI。参见图8，是本申请提供的DCI联合组装的示意图。UE对两份DCI进行联合组装时，可分别取出第一DCI和第二DCI的信息比特，并剔除掉指示比特，联合组装成一个完整的DCI。
在本申请中，基站将待传输的DCI分配了两个聚合级别为8的候选物理资源(即候选CCE资源)上，相当于每个聚合级别为8的候选用户CCE资源承载的信息比特减半，实质上也是降低传输码率，通过码率换取覆盖增益，增加了覆盖增强的实现方式的多样性，适用性更强。
需要说明的是，对于增强物理下行控制信道(英文：Enhanced Physical Downlink Control Channel，EPDCCH)上的数据传输，为了实现EPDCCH的增强覆盖，本申请也对EPDCCH传输所需占用的增强控制信道单元(英文：Enhanced Control Channel Element，ECCE)进行了扩展，以增强DCI信息的处理方式的灵活性，提高DCI信息的处理方法的适用性，提高EPDCCH的覆盖增益。
在LTE***中，循环前缀(英文：Cyclic Prefix，CP)包括正常循环前缀(英文：Normal CP)和扩展循环前缀(英文：Extended CP)，数据传输子帧包括正常子帧(英文：Normal subframe)和特殊子帧(英文：Special subframe)。因此，两种形式的循环前缀与两种形式的数据传输子帧可组合得到4种类型的数据传输方式：
Ⅰ.Normal CP&Normal subframe；
Ⅱ.Normal CP&Special subframe；
Ⅲ.Extended CP&Normal subframe；
Ⅳ.Extended CP&Special subframe。
其中，上述4种类型的数据传输方式可采用2种分类方式进行分类，具体可将上述4种类型的数据传输方式分类为CaseA和CaseB，或者Case1、Case2和Case3。
具体分类结果如下：
Ⅰ.Normal CP&Normal subframe分类为CaseA；
Ⅱ.Normal CP&Special subframe分类为CaseB；
Ⅲ.Extended CP&Normal subframe分类为CaseB；
Ⅳ.Extended CP&Special subframe分类为CaseB；
或者
Ⅰ.Normal CP&Normal subframe分类为Case1；
Ⅱ.Normal CP&Special subframe分类为Case3；
Ⅲ.Extended CP&Normal subframe分类为Case2；
Ⅳ.Extended CP&Special subframe分类为Case3。
在EPDCCH数据传输过程中，不同的Case的数据传输方式对应不同的搜索空间。
在LTE中，EPDCCH有多少个ECCE传输需要依赖于EPDCCH Format(EPDCCH格式)，因此需要定义不同取值的EPDCCH Format所对应的EPDCCH传输占用的ECCE数目。 参见表5，是LTE中单个EPDCCH所占用的ECCE数目的一示意表。
表5
Figure PCTCN2017072747-appb-000062
如上表5所示，在LTE***中，EPDCCH Format包括0、1、2、3和4五种格式，每种格式对应着多种资源分配方式，以及各种资源分配方式下的
Figure PCTCN2017072747-appb-000063
在表5中，每种Case下都有两种资源分配方式，分别为Localized transmission(集中式传输)和Distributed transmission(分布式传输)。例如，在CaseA下，EPDCCH format为0并且资源分配方式为Localized transmission时，每个EPCDD占用的ECCE为2；EPDCCH format为1并且资源分配方式为Localized transmission时，每个EPCDD占用的ECCE为4。
需要说明的是，在本申请中，单个EPDCCH所占用的ECCE数目
Figure PCTCN2017072747-appb-000064
相当于PDCCH传输中的聚合等级，下面将以L指代聚合级别，也即指代
Figure PCTCN2017072747-appb-000065
为例进行说明。
在LTE中，在相同的聚合等级(L)下，若UE(标记为Xp)的EPDCCH所占用的资源块(英文：Resource Block，RB，标记为
Figure PCTCN2017072747-appb-000066
)不相同，则对应的搜索空间中包括的EPDCCH候选数目也不相同。其中，Xp所占用的RB数目在各个聚合等级上所对应的EPDCCH候选数目(英文：Number of EPDCCH candidates)可标记为
Figure PCTCN2017072747-appb-000067
在LTE中，Xp的EPDCCH所占用的RB数目可包括2、4和8。Xp所占用的RB数目不同，相同聚合等级下所对应的搜索空间中包括的
Figure PCTCN2017072747-appb-000068
也不相同。如下表6和表7，表6和表7是不同的Case下，不同的RB数目在不同的聚合等级下对应的
Figure PCTCN2017072747-appb-000069
示意表：
表6
Figure PCTCN2017072747-appb-000070
在表6展示了Case1和Case2中
Figure PCTCN2017072747-appb-000071
为2、4和8等场景下，各个聚合等级对应的
Figure PCTCN2017072747-appb-000072
例如，在Case1中，
Figure PCTCN2017072747-appb-000073
为2时，聚合等级为2所对应的
Figure PCTCN2017072747-appb-000074
为4，聚合等级为32对应的
Figure PCTCN2017072747-appb-000075
为0。在Case2中，
Figure PCTCN2017072747-appb-000076
为2时，聚合等级为1所对应的
Figure PCTCN2017072747-appb-000077
为4，聚合等级为16对应的
Figure PCTCN2017072747-appb-000078
为0。
表7
Figure PCTCN2017072747-appb-000079
在表7展示了Case3中
Figure PCTCN2017072747-appb-000080
为2、4和8等场景下，各个聚合等级对应的
Figure PCTCN2017072747-appb-000081
例如，在Case3中，
Figure PCTCN2017072747-appb-000082
为2时，聚合等级为2所对应的
Figure PCTCN2017072747-appb-000083
为4，聚合等级为16对应的
Figure PCTCN2017072747-appb-000084
为0。
为了实现EPDCCH的增强覆盖，本申请对EPDCCH的聚合等级(即每个EPDCCH占用的ECCE数目
Figure PCTCN2017072747-appb-000085
)进行扩展得到EPDCCH Format为5或者6对应的聚合等级，如下表8，表8是LTE中单个EPDCCH所占用的ECCE数目的另一示意表。
表8
Figure PCTCN2017072747-appb-000086
如上表8所示，本申请在表5所示的聚合等级列表中，新增了EPDCCH format为4所对应的聚合等级，包括Case A中的集中式传输(即Localized transmission)对应的聚合等级32，以及Case B中的集中式传输对应的聚合等级16。表8所示的聚合等级中还包括EPDCCH format为5所对应的聚合等级，包括Case A中的分布式传输(即Distributed transmission)对应的聚合等级64，以及Case B中的分布式传输对应的聚合等级32。其中，上述EPDCCH format为5的格式下，EPDCCH需要占用16个RB。
同理，本申请对EPDCCH的聚合等级(即每个EPDCCH占用的ECCE数目
Figure PCTCN2017072747-appb-000087
)进行扩展得到EPDCCH Format为6对应的聚合等级，如下表9，表9是LTE中单个EPDCCH所占用的ECCE数目的另一示意表。
表9
Figure PCTCN2017072747-appb-000088
如上表9所示，本申请在表8所示的聚合等级列表中，新增了EPDCCH format为5所对应的聚合等级，包括Case A中的集中式传输对应的聚合等级32，以及Case B中的集中式传输对应的聚合等级32。表9所示的聚合等级中还包括EPDCCH format为6所对应的聚合等级，包括Case A中的分布式传输对应的聚合等级128，以及Case B中的分布式传输对应的聚合等级64。其中，上述EPDCCH format为6的格式下，EPDCCH需要占用32个 RB。
本申请所提供的实现方式还可根据上述EPDCCH format的扩展，对LTE中的检测候选用户表(即本申请所描述的搜索空间)进行了扩展，得到如下表10所示的检测候选用户表，
表10为扩展后的一个EPDCCH候选用户表。
表10
Figure PCTCN2017072747-appb-000089
上述表10为一个UE对应的一个分布式EPDCCH物理资源集合，其中包括Case1和Case2两种场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。本申请在上述表6的基础上，在Case1包括的聚合等级中扩展了聚合等级L＝64，以及L＝64时，
Figure PCTCN2017072747-appb-000090
取值为2、4或8所对应的
Figure PCTCN2017072747-appb-000091
如上述表10所示，本申请还扩展了
Figure PCTCN2017072747-appb-000092
取值为16时，各个聚合等级对应的
Figure PCTCN2017072747-appb-000093
同理，在Case2对应的EPDCCH候选用户中，扩展了聚合等级L＝32以及L＝32时，
Figure PCTCN2017072747-appb-000094
取值为2、4或8所对应的
Figure PCTCN2017072747-appb-000095
如上述表10所示，Case2中，本申请还扩展了
Figure PCTCN2017072747-appb-000096
取值为16时，各个聚合等级对应的
Figure PCTCN2017072747-appb-000097
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，对上述Case3场景下的检测候选用户表进行了扩展，得到如下表11所示的检测候选用户表，表11为扩展后的另一个EPDCCH候选用户表。
表11
Figure PCTCN2017072747-appb-000098
上述表11为一个UE对应的一个分布式EPDCCH物理资源集合，其中包括Case3场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。本申请在上述表7的基础上，在Case3包括的聚合等级中扩展了聚合等级L＝32，以及L＝32时，
Figure PCTCN2017072747-appb-000099
取值为2、4或8所对应的
Figure PCTCN2017072747-appb-000100
如上述表11所示，本申请还扩展了
Figure PCTCN2017072747-appb-000101
取值为16时，各个聚合等级对应的
Figure PCTCN2017072747-appb-000102
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，对LTE中的检测候选 用户表进行了扩展，得到如下表12所示的检测候选用户表。表12为扩展后的另一个EPDCCH候选用户表。
表12
Figure PCTCN2017072747-appb-000103
上述表12为一个UE对应的一个集中式EPDCCH物理资源集合，其中包括Case1和Case2两种场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。本申请在上述表6的基础上，在Case1包括的聚合等级中扩展了聚合等级L＝32，以及L＝32时，
Figure PCTCN2017072747-appb-000104
取值为2、4或8所对应的
Figure PCTCN2017072747-appb-000105
如上述表12所示，本申请还扩展了
Figure PCTCN2017072747-appb-000106
取值为16时，各个聚合等级对应的
Figure PCTCN2017072747-appb-000107
同理，在Case2对应的EPDCCH候选用户中，扩展了聚合等级L＝16以及L＝16时，
Figure PCTCN2017072747-appb-000108
取值为2、4或8所对应的
Figure PCTCN2017072747-appb-000109
如上述表12所示，Case2中，本申请还扩展了
Figure PCTCN2017072747-appb-000110
取值为16时，各个聚合等级对应的
Figure PCTCN2017072747-appb-000111
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，对LTE中的检测候选用户表进行了扩展，得到如下表13所示检测候选用户表，表13为扩展后的另一个EPDCCH候选用户表。
表13
Figure PCTCN2017072747-appb-000112
上述表13为一个UE对应的一个集中式EPDCCH物理资源集合，其中包括Case3场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。本申请在上述表7的基础上，在Case3包括的聚合等级中扩展了聚合等级L＝16，以及L＝16时，
Figure PCTCN2017072747-appb-000113
取值为2、4或8所对应的
Figure PCTCN2017072747-appb-000114
如上述表13所示，本申请还扩展了
Figure PCTCN2017072747-appb-000115
取值为16时，各个聚合等级对应的
Figure PCTCN2017072747-appb-000116
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，针对两个物理资源集 合的应用场景(上述两个物理资源集合可分别标记为Xp1和Xp2)对LTE中的检测候选用户表进行了扩展，得到如下表14所示的检测候选用户表，表14为扩展后的另一个EPDCCH候选用户表。
表14
Figure PCTCN2017072747-appb-000117
上述表14中包括的加粗项则为本申请扩展的数据。上述表14为UE需要检测的的两个分布式传输的EPDCCH物理资源集合，其中包括Case1和Case2两种场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。其中，
Figure PCTCN2017072747-appb-000118
为Xp1所占的RB数目，
Figure PCTCN2017072747-appb-000119
为Xp2所占的RB数目，L为聚合等级。表14所示的检测候选用户表中，在Case1包括的聚合等级中扩展了聚合等级L＝64，以及L＝64时，
Figure PCTCN2017072747-appb-000120
的取值与
Figure PCTCN2017072747-appb-000121
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000122
和
Figure PCTCN2017072747-appb-000123
等。其中，
Figure PCTCN2017072747-appb-000124
对应Xp1的EPDCCH候选数目，
Figure PCTCN2017072747-appb-000125
对应Xp2对应的EPDCCH候选数目。如上述表14所示，在Case1中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。同理，在Case2对应的EPDCCH候选用户中，扩展了聚合等级L＝32以及L＝32时，
Figure PCTCN2017072747-appb-000126
的取值与
Figure PCTCN2017072747-appb-000127
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000128
和
Figure PCTCN2017072747-appb-000129
如上述表14所示，Case2中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。具体可参见上述表14中描述的具体参数值，在此不再赘述。
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，还针对Xp1和Xp2对LTE中的检测候选用户表进行了扩展，得到如下表15所示的检测候选用户表，表15为扩展后的另一个EPDCCH候选用户表。
表15
Figure PCTCN2017072747-appb-000130
上述表15中包括的加粗项则为本申请扩展的数据。上述表15为UE需要检测的两个分布式EPDCCH物理资源集合，其中包括Case3景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。表15所示的检测候选用户表中，在Case3包括的聚合等级中扩展了聚合等级L＝32，以及L＝32时，
Figure PCTCN2017072747-appb-000131
的取值与
Figure PCTCN2017072747-appb-000132
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000133
和
Figure PCTCN2017072747-appb-000134
如上述表14所示，在Case3中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，针对两个物理资源集合的应用场景(包括Xp1和Xp2)对LTE中的检测候选用户表进行了扩展，得到如下表16所示的检测候选用户表，表16为扩展后的另一个EPDCCH候选用户表。
表16
Figure PCTCN2017072747-appb-000135
上述表16中包括的加粗项则为本申请扩展的数据。上述表16为UE需要检测的两个集中式传输的EPDCCH物理资源集合，其中包括Case1和Case2两种场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。表16所示的检测候选用户表中，在Case1包括的聚合等级中扩展了聚合等级L＝32，以及L＝32时，
Figure PCTCN2017072747-appb-000136
的取值与
Figure PCTCN2017072747-appb-000137
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000138
和
Figure PCTCN2017072747-appb-000139
如上述表16所示，在Case1中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。同理，在Case2对应的EPDCCH候选用户中，扩展了聚合等级L＝16以及L＝16时，
Figure PCTCN2017072747-appb-000140
的取值与
Figure PCTCN2017072747-appb-000141
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000142
和
Figure PCTCN2017072747-appb-000143
如上述表16所示，Case2中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。具体可参见上述表16中描述的具体参数值，在此不再赘述。
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，针对上述Case3场景，对两个物理资源集合的应用场景(包括Xp1和Xp2)下LTE的检测候选用户表进行了扩展，得到如下表17所示的检测候选用户表，表17为扩展后的另一个EPDCCH候选用户表。
表17
Figure PCTCN2017072747-appb-000144
上述表17中包括的加粗项则为本申请扩展的数据。上述表17为UE需要检测的两个集中式传输的EPDCCH物理资源集合，其中包括Case3景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。表17所示的检测候选用户表中，在Case3包括的聚合等级中扩展了聚合等级L＝16，以及L＝16时，
Figure PCTCN2017072747-appb-000145
的取值与
Figure PCTCN2017072747-appb-000146
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000147
和
Figure PCTCN2017072747-appb-000148
如上述表17所示，在Case3中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。具体可参见上述表17中所示的各个参数，在此不再赘述。
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，针对两个物理资源集合的应用场景(包括Xp1和Xp2)对LTE中的检测候选用户表进行了扩展，得到如下表18所示的检测候选用户表，表18为扩展后的另一个EPDCCH候选用户表。其中，Xp1对应的数据传输方式为集中式传输，Xp2对应的数据传输方式为分布式传输。
表18
Figure PCTCN2017072747-appb-000149
上述表18中包括的加粗项则为本申请扩展的数据。上述表18为UE需要检测的两个分别为集中式和分布式的物理资源集合，其中
Figure PCTCN2017072747-appb-000150
为集中式传输的Xp1对应的EPDCCH物理资源集合，
Figure PCTCN2017072747-appb-000151
为分布式传输的Xp2对应的EPDCCH物理资源集合。其中包括Case1和Case2两种场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。其中，
Figure PCTCN2017072747-appb-000152
为Xp1的RB数目，
Figure PCTCN2017072747-appb-000153
为Xp2的RB数目，L为聚合等级。表18所示的检测候选用户表中，在Case1包括的聚合等级中扩展了聚合等级L＝64，以及L＝64时，
Figure PCTCN2017072747-appb-000154
的取值与
Figure PCTCN2017072747-appb-000155
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000156
和
Figure PCTCN2017072747-appb-000157
如上述表18所示，在Case1中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。同理，在Case2对应的EPDCCH候选用户中，扩展了聚合等级L＝32以及L＝32时，
Figure PCTCN2017072747-appb-000158
的取值与
Figure PCTCN2017072747-appb-000159
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000160
和
Figure PCTCN2017072747-appb-000161
如上述表18所示，Case2中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的 EPDCCH候选用户数目。具体可参见上述表18中描述的具体参数值，在此不再赘述。
本申请所提供的实现方式中还根据上述EPDCCH format的扩展，针对两个物理资源集合的应用场景(包括Xp1和Xp2)对LTE中的检测候选用户表进行了扩展，得到如下表19所示的检测候选用户表，表19为扩展后的另一个EPDCCH候选用户表。其中，Xp1对应的数据传输方式为集中式传输，Xp2对应的数据传输方式为分布式传输。
表19
Figure PCTCN2017072747-appb-000162
上述表19中包括的加粗项则为本申请扩展的数据。上述表19为UE需要检测的两个分别为集中式和分布式的物理资源集合，其中
Figure PCTCN2017072747-appb-000163
为集中式传输的Xp1对应的EPDCCH物理资源集合，
Figure PCTCN2017072747-appb-000164
为分布式传输的Xp2对应的EPDCCH物理资源集合。其中包括Case3场景下，不同的RB数目在不同的聚合等级下对应的EPDCCH候选用户数目。其中，
Figure PCTCN2017072747-appb-000165
为Xp1的RB数目，
Figure PCTCN2017072747-appb-000166
为Xp2的RB数目，L为聚合等级。表19所示的检测候选用户表中，在Case3包括的聚合等级中扩展了聚合等级L＝32，以及L＝32时，
Figure PCTCN2017072747-appb-000167
的取值与
Figure PCTCN2017072747-appb-000168
的取值的多种组合所对应的EPDCCH候选数目
Figure PCTCN2017072747-appb-000169
和
Figure PCTCN2017072747-appb-000170
如上述表19所示，在Case3中，本申请还扩展了RB数目取值为16时，各个聚合等级对应的EPDCCH候选用户数目。具体可参见上述表19中描述的具体参数值，在此不再赘述。
在本申请所描述的实现方式中，UE可根据基站配置的EPDCCH所占用的物理资源类型(包括集中式传输或者分布式传输)，物理资源集的个数(一个或者两个)以及当前循环前缀和子帧所对应的Case类型，结合上述表6至表19等各个检测候选用户表所适用的应用场景，从中选出适用于UE当前所处场景的目标检测候选用户表。进一步的，UE可根据 基站配置的EPDCCH所占用的RB数目，以及UE所支持的聚合等级，从上述目标检测候选用户表中确定出相应的EPDCCH候选用户(即盲检搜索空间)，并在所述EPDCCH候选用户上进行盲检以获取基站下发的DCI。
本申请可对EPDCCH检测候选用户集进行扩展，可扩展EPDCCH所占用的RB数目以及UE支持的聚合等级，进而可扩展EPDCCH候选用户集，可扩展EPDCCH的信道覆盖范围，提高EPDCCH的信道覆盖增益。
参见图9，是本申请提供的终端的一结构示意图。本申请提供的终端可包括：
确定模块91，用于根据终端支持的聚合等级确定预定义搜索空间，所述预定义搜索空间包括聚合等级16和聚合等级24中的至少一种聚合等级对应的搜索空间。
搜索模块92，用于在所述确定模块确定的所述预定义搜索空间上进行盲检以获取下行链路控制信息DCI。
在一些可行的实施方式中，上述终端支持的聚合等级中包括聚合等级16；
所述预定义搜索空间中包括所述聚合等级16对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的物理下行控制信道PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
所述聚合等级16对应的公共搜索空间大小为16，所述公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为16，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
在一些可行的实施方式中，上述终端支持的聚合等级中包括聚合等级24；
所述预定义搜索空间中包括所述聚合等级24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
所述聚合等级24对应的公共搜索空间大小为24，所述公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为24，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
在一些可行的实施方式中，上述终端支持的聚合等级中包括聚合等级16和24；
所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为16，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为24，所述聚合等级24对应的终端专 用搜索空间大小所对应的PDCCH候选数目为1。
在一些可行的实施方式中，上述终端支持的聚合等级中包括聚合等级16和24；
所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级16对应的终端专用搜索空间大小为32，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为2；
所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
所述聚合等级24对应的终端专用搜索空间大小为48，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为2。
在一些可行的实施方式中，上述终端还包括：
发送模块93，用于向基站上报所述终端支持的至少一个聚合等级；
其中，所述DCI承载在所述至少一个聚合等级中的聚合等级N对应的物理资源上。
在一些可行的实施方式中，上述确定模块91还用于：
获取基站的广播消息，根据所述广播消息确定所述终端所处小区支持的聚合等级；
上述发送模块93用于：
从所述小区支持的聚合等级中查找所述终端所支持的聚合等级，并从所述终端所支持的聚合等级中选择至少一个聚合等级，将选择的所述至少一个聚合等级上报给所述基站。
参见图10，是本申请提供的终端的另一结构示意图。本申请提供的终端包括：
确定模块101，用于根据增强物理下行控制信道EPDCCH所占用的资源块RB数目以及所述终端所支持的聚合等级，从预定义搜索空间中确定出所述终端的盲检搜索空间，所述预定义搜索空间包括所述RB数目为16所对应的搜索空间。
搜索模块102，用于在所述确定模块确定的所述盲检搜索空间上进行盲检以获取下行链路控制信息DCI。
在一些可行的实施方式中，上述预定义搜索空间包括如上述表10至表19任一项所示数据。
在一些可行的实施方式中，上述预定义搜索空间还包括所述RB数目为32所对应的搜索空间，所述RB数目为32所对应的聚合等级包括128。
参见图11，是本申请提供的终端的另一结构示意图。本申请提供的终端包括：
发送模块111，用于向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N。
搜索模块112，用于按照所述发送模块上报的所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检。
合并模块113，用于在所述搜索模块按照所述聚合等级N对承载在两份物理下行控制 信道PDCCH物理资源上的两个相同的DCI均盲检错误时，将所述两个相同的DCI进行频域数据合并。
搜索模块112，还用于按照所述聚合等级N对所述合并模块合并所述频域数据的结果进行盲检以获取所述基站下发的DCI。
在一些可行的实施方式中，上述发送模块111还用于：
向所述基站上报所述终端具备频域数据合并能力的消息；
其中，所述消息提供给所述基站用于确定是否在所述聚合等级N的两份PDCCH物理资源上重复发送所述终端的DCI。
参见图12，是本申请提供的基站的结构示意图。本申请提供的基站包括：
接收模块121，用于接收终端上报的所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N。
处理模块122，用于将用于控制所述终端的下行链路控制信息DCI拆分为第一DCI和第二DCI。
发送模块123，用于将所述处理模块处理得到的所述第一DCI和所述第二DCI发送给所述终端；
所述第一DCI和所述第二DCI分别承载在所述聚合等级N对应的两个不同的物理下行控制信道PDCCH物理资源上，所述第一DCI和第二CDI用于所述终端进行联合解析；所述N为自然数。
在一些可行的实施方式中，上述接收模块121还用于：
接收所述终端上报的消息，根据所述消息确定所述终端具备频域数据合并能力。
在一些可行的实施方式中，上述处理模块122还用于：
获取所述终端的物理随机接入信道的前导码，根据所述前导码确定所述终端具备频域数据合并能力。
参见图13，是本申请提供的终端的结构示意图。本申请提供的终端可包括：
发送模块131，用于向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N。
搜索模块132，用于按照所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检。
处理模块133，用于在所述搜索模块按照所述聚合等级N上对承载在两份物理下行控制信道PDCCH物理资源上的第一DCI和第二DCI均盲检正确时，将所述第一DCI和所述第二DCI进行联合组装以得到所述基站下发的DCI。
在一些可行的实施方式中，上述发送模块131，还用于：
向所述基站上报所述终端具备频域数据合并能力的消息。
参见图14，是本申请提供的终端的另一结构示意图。本申请提供的终端可包括：存储器141、处理器142和收发器143，其中存储器141和、处理器142和收发器143可通过总线连接。
存储器141包括但不限于是随机存取存储器(random access memory，RAM)、只读存储器(read-only memory，ROM)、可擦除可编程只读存储器(erasable programmable read only  memory，EPROM)、或便携式只读存储器(compact disc read-only memory，CD-ROM)，该存储器141用于存储相关的程序代码或者数据。
处理器142可以是一个或多个中央处理器(central processing unit，CPU)，在处理器142是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
上述处理器142和收发器143用于读取存储器141中存储的程序代码，执行上述任一实施例中所描述的终端的实现方式，在此不再赘述。
参见图15，是本申请提供的基站的另一结构示意图。本申请提供的基站可包括：存储器151、处理器152和收发器153，其中存储器151、处理器152和收发器153可通过总线连接。
存储器151包括但不限于RAM、ROM、EPROM以及CD-ROM，该存储器141用于存储相关的程序代码或者数据。
处理器152可以是一个或多个CPU，在处理器152是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
上述处理器152和收发器153用于读取存储器151中存储的程序代码，执行上述任一实施例中所描述的基站的实现方式，在此不再赘述。
在本申请中，小区以及终端支持的聚合等级可扩展到聚合等级16或者24上，基站可将下发给UE的DCI适配到更大的物理资源上，在信息比特不变的情况下，降低了PDCCH传输码率用以获取PDCCH覆盖增益，可提高下行覆盖的增益，提高下行覆盖增强的实现方式多样性，适用性更高。本申请还可对EPDCCH检测候选用户集进行扩展，可扩展EPDCCH所占用的RB数目以及UE支持的聚合等级，进而可扩展EPDCCH候选用户集，可扩展EPDCCH的信道覆盖范围，提高EPDCCH的信道覆盖增益。
进一步的，在本申请中，基站可在同一个TTI上在两份不同的PDCCH物理资源上下发UE的DCI，即，基站可在同一个TTI上重复下发两次UE的DCI，通过频域数据合并来获取更高的覆盖增益，操作更简单，适用性高。在本申请中，基站将待传输的DCI分配了两个聚合级别为N的候选物理资源(即候选CCE资源)上，相当于每个聚合级别为N的候选用户CCE资源承载的信息比特减半，实质上也是降低传输码率，通过码率换取覆盖增益，增加了覆盖增强的实现方式的多样性，适用性更强。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。

Claims (48)

  1. 一种下行链路控制信息的获取方法，其特征在于，包括：
    终端根据其支持的聚合等级确定预定义搜索空间，所述预定义搜索空间包括聚合等级16和聚合等级24中的至少一种聚合等级对应的搜索空间；
    所述终端在所述预定义搜索空间上进行盲检以获取下行链路控制信息DCI。
  2. 如权利要求1所述的方法，其特征在于，所述终端支持的聚合等级中包括聚合等级16；
    所述预定义搜索空间中包括所述聚合等级16对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的物理下行控制信道PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
    所述聚合等级16对应的公共搜索空间大小为16，所述公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级16对应的终端专用搜索空间大小为16，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
  3. 如权利要求1所述的方法，其特征在于，所述终端支持的聚合等级中包括聚合等级24；
    所述预定义搜索空间中包括所述聚合等级24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
    所述聚合等级24对应的公共搜索空间大小为24，所述公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的终端专用搜索空间大小为24，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
  4. 如权利要求1所述的方法，其特征在于，所述终端支持的聚合等级中包括聚合等级16和24；
    所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
    其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级16对应的终端专用搜索空间大小为16，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空 间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的终端专用搜索空间大小为24，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为1。
  5. 如权利要求1所述的方法，其特征在于，所述终端支持的聚合等级中包括聚合等级16和24；
    所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
    其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级16对应的终端专用搜索空间大小为32，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为2；
    所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的终端专用搜索空间大小为48，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为2。
  6. 如权利要求1-5任一项所述的方法，其特征在于，所述终端根据其支持的聚合等级确定预定义搜索空间之前，所述方法还包括：
    终端向基站上报所述终端支持的至少一个聚合等级；
    其中，所述DCI承载在所述至少一个聚合等级中的聚合等级N对应的物理资源上。
  7. 如权利要求6所述的方法，其特征在于，所述终端向基站上报所述终端支持的至少一个聚合等级之前，所述方法还包括：
    终端获取基站的广播消息，根据所述广播消息确定所述终端所处小区支持的聚合等级；
    所述终端向基站上报所述终端支持的至少一个聚合等级包括：
    所述终端从所述小区支持的聚合等级中查找其所支持的聚合等级，并从其所支持的聚合等级中选择至少一个聚合等级，将选择的所述至少一个聚合等级上报给所述基站。
  8. 一种下行链路控制信息的获取方法，其特征在于，包括：
    终端根据增强物理下行控制信道EPDCCH所占用的资源块RB数目以及所述终端所支持的聚合等级，从预定义搜索空间中确定出所述终端的盲检搜索空间，所述预定义搜索空间包括所述RB数目为16所对应的搜索空间；
    所述终端在所述盲检搜索空间上进行盲检以获取下行链路控制信息DCI。
  9. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括所述EPDCCH 所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表1：
    表1
    Figure PCTCN2017072747-appb-100001
    其中，所述
    Figure PCTCN2017072747-appb-100002
    为所述终端占用的RB数目，所述L为聚合等级。
  10. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表2：
    表2
    Figure PCTCN2017072747-appb-100003
    其中，所述
    Figure PCTCN2017072747-appb-100004
    为所述终端占用的RB数目，所述L为聚合等级。
  11. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表3：
    表3
    Figure PCTCN2017072747-appb-100005
    其中，所述
    Figure PCTCN2017072747-appb-100006
    为所述终端占用的RB数目，所述L为聚合等级。
  12. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表4：
    表4
    Figure PCTCN2017072747-appb-100007
    其中，所述
    Figure PCTCN2017072747-appb-100008
    为所述终端占用的RB数目，所述L为聚合等级。
  13. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表5：
    表5
    Figure PCTCN2017072747-appb-100009
    其中，所述
    Figure PCTCN2017072747-appb-100010
    为所述终端占用的RB数目，所述L为聚合等级。
  14. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括所述EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目，如下表6：
    表6
    Figure PCTCN2017072747-appb-100011
    其中，所述
    Figure PCTCN2017072747-appb-100012
    为所述终端占用的RB数目，所述L为聚合等级。
  15. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100013
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应 的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100014
    如下表7：
    表7
    Figure PCTCN2017072747-appb-100015
    其中，所述
    Figure PCTCN2017072747-appb-100016
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100017
    为所述Xp2的RB数目，所述L为聚合等级。
  16. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100018
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100019
    如下表8：
    表8
    Figure PCTCN2017072747-appb-100020
    其中，所述
    Figure PCTCN2017072747-appb-100021
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100022
    为所述Xp2的RB数目，所述L为聚合等级。
  17. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100023
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100024
    如下表9：
    表9
    Figure PCTCN2017072747-appb-100025
    其中，所述
    Figure PCTCN2017072747-appb-100026
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100027
    为所述Xp2的RB数目，所述L为聚合等级。
  18. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100028
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100029
    如下表10：
    表10
    Figure PCTCN2017072747-appb-100030
    其中，所述
    Figure PCTCN2017072747-appb-100031
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100032
    为所述Xp2的RB数目，所述L为聚合等级。
  19. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100033
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100034
    如下表11：
    表11
    Figure PCTCN2017072747-appb-100035
    其中，所述
    Figure PCTCN2017072747-appb-100036
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100037
    为所述Xp2的RB数目，所述L为聚合等级。
  20. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100038
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100039
    如下表12：
    表12
    Figure PCTCN2017072747-appb-100040
    其中，所述
    Figure PCTCN2017072747-appb-100041
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100042
    为所述Xp2的RB数目，所述L为聚合等级。
  21. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100043
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100044
    如下表13：
    表13
    Figure PCTCN2017072747-appb-100045
    其中，所述
    Figure PCTCN2017072747-appb-100046
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100047
    为所述Xp2的RB数目，所述L为聚合等级。
  22. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100048
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100049
    如下表14：
    表14
    Figure PCTCN2017072747-appb-100050
    其中，所述
    Figure PCTCN2017072747-appb-100051
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100052
    为所述Xp2的RB数目，所述L为聚合等级。
  23. 如权利要求8所述的方法，其特征在于，所述预定义搜索空间包括第一物理资源集合Xp1的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100053
    和第二物理资源集合Xp2的EPDCCH所占用的RB数目在各个聚合等级下所对应的EPDCCH候选数目
    Figure PCTCN2017072747-appb-100054
    如下表15：
    表15
    Figure PCTCN2017072747-appb-100055
    其中，所述
    Figure PCTCN2017072747-appb-100056
    为所述Xp1的RB数目，所述
    Figure PCTCN2017072747-appb-100057
    为所述Xp2的RB数目，所述L为聚合等级。
  24. 如权利要求8-23任一项所述的方法，其特征在于，所述预定义搜索空间还包括所述RB数目为32所对应的搜索空间，所述RB数目为32所对应的聚合等级包括128。
  25. 一种下行链路控制信息的获取方法，其特征在于，包括：
    终端向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
    所述终端按照所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检；
    所述终端按照所述聚合等级N对承载在两份物理下行控制信道PDCCH物理资源上的两个相同的DCI均盲检错误，则将所述两个相同的DCI进行频域数据合并；
    所述终端按照所述聚合等级N对所述频域数据合并的结果进行盲检以获取所述基站下发的DCI。
  26. 如权利要求25所述的方法，其特征在于，所述终端向基站上报所述终端支持的至少一个聚合等级之前，所述方法还包括：
    所述终端向所述基站上报所述终端具备频域数据合并能力的消息；
    其中，所述消息提供给所述基站用于确定是否在所述聚合等级N的两份PDCCH物理 资源上重复发送所述终端的DCI。
  27. 一种下行链路控制信息的下发方法，其特征在于，包括：
    基站接收终端上报的所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
    所述基站将用于控制所述终端的下行链路控制信息DCI拆分为第一DCI和第二DCI；
    所述基站将所述第一DCI和所述第二DCI发送给所述终端；
    所述第一DCI和所述第二DCI分别承载在所述聚合等级N对应的两个不同的物理下行控制信道PDCCH物理资源上，所述第一DCI和第二CDI用于所述终端进行联合解析；所述N为自然数。
  28. 如权利要求27所述的方法，其特征在于，所述方法还包括：
    所述基站接收所述终端上报的消息，根据所述消息确定所述终端具备频域数据合并能力。
  29. 如权利要求27所述的方法，其特征在于，在所述基站将所述终端的DCI拆分为第一DCI和第二DCI之前，所述方法还包括：
    所述基站确定所述终端具备频域数据合并能力，包括：
    所述基站获取所述终端的物理随机接入信道的前导码，根据所述前导码确定所述终端具备频域数据合并能力。
  30. 一种下行链路控制信息的获取方法，其特征在于，包括：
    终端向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
    所述终端按照所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检；
    若所述终端按照所述聚合等级N上对承载在两份物理下行控制信道PDCCH物理资源上的第一DCI和第二DCI均盲检正确，则将所述第一DCI和所述第二DCI进行联合组装以得到所述基站下发的DCI。
  31. 如权利要求30所述的方法，其特征在于，所述方法还包括：
    所述终端向所述基站上报所述终端具备频域数据合并能力的消息。
  32. 一种终端，其特征在于，包括：
    确定模块，用于根据终端支持的聚合等级确定预定义搜索空间，所述预定义搜索空间包括聚合等级16和聚合等级24中的至少一种聚合等级对应的搜索空间；
    搜索模块，用于在所述确定模块确定的所述预定义搜索空间上进行盲检以获取下行链路控制信息DCI。
  33. 如权利要求32所述的终端，其特征在于，所述终端支持的聚合等级中包括聚合等级16；
    所述预定义搜索空间中包括所述聚合等级16对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的物理下行控制信道PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
    所述聚合等级16对应的公共搜索空间大小为16，所述公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级16对应的终端专用搜索空间大小为16，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
  34. 如权利要求32所述的终端，其特征在于，所述终端支持的聚合等级中包括聚合等级24；
    所述预定义搜索空间中包括所述聚合等级24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述公共搜索空间大小所对应的PDCCH候选数目、所述终端专用搜索空间大小所对应的PDCCH候选数目；
    所述聚合等级24对应的公共搜索空间大小为24，所述公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的终端专用搜索空间大小为24，所述终端专用搜索空间大小所对应的PDCCH候选数目为1。
  35. 如权利要求32所述的终端，其特征在于，所述终端支持的聚合等级中包括聚合等级16和24；
    所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
    其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级16对应的终端专用搜索空间大小为16，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的终端专用搜索空间大小为24，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为1。
  36. 如权利要求32所述的终端，其特征在于，所述终端支持的聚合等级中包括聚合等级16和24；
    所述预定义搜索空间中包括所述聚合等级16和24对应的公共搜索空间大小和终端专用搜索空间大小，以及所述聚合等级16和24对应的公共搜索空间大小所对应的PDCCH候选数目、所述聚合等级16和24对应的终端专用搜索空间大小所对应的PDCCH候选数目；
    其中，所述聚合等级16对应的公共搜索空间大小为16，所述聚合等级16对应的公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级16对应的终端专用搜索空间大小为32，所述聚合等级16对应的终端专用搜索空间大小所对应的PDCCH候选数目为2；
    所述聚合等级24对应的公共搜索空间大小为24，所述聚合等级24对应的公共搜索空间大小所对应的PDCCH候选数目为1；
    所述聚合等级24对应的终端专用搜索空间大小为48，所述聚合等级24对应的终端专用搜索空间大小所对应的PDCCH候选数目为2。
  37. 如权利要求32-36任一项所述的终端，其特征在于，所述终端还包括：
    发送模块，用于向基站上报所述终端支持的至少一个聚合等级；
    其中，所述DCI承载在所述至少一个聚合等级中的聚合等级N对应的物理资源上。
  38. 如权利要求37所述的终端，其特征在于，所述确定模块还用于：
    获取基站的广播消息，根据所述广播消息确定所述终端所处小区支持的聚合等级；
    所述发送模块用于：
    从所述小区支持的聚合等级中查找所述终端所支持的聚合等级，并从所述终端所支持的聚合等级中选择至少一个聚合等级，将选择的所述至少一个聚合等级上报给所述基站。
  39. 一种终端，其特征在于，包括：
    确定模块，用于根据增强物理下行控制信道EPDCCH所占用的资源块RB数目以及所述终端所支持的聚合等级，从预定义搜索空间中确定出所述终端的盲检搜索空间，所述预定义搜索空间包括所述RB数目为16所对应的搜索空间；
    搜索模块，用于在所述确定模块确定的所述盲检搜索空间上进行盲检以获取下行链路控制信息DCI。
  40. 如权利要求39所述的终端，其特征在于，所述预定义搜索空间包括如权利要求9-24中表1至表15任一项所示数据。
  41. 如权利要求40所述的终端，其特征在于，所述预定义搜索空间还包括所述RB数目为32所对应的搜索空间，所述RB数目为32所对应的聚合等级包括128。
  42. 一种终端，其特征在于，包括：
    发送模块，用于向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
    搜索模块，用于按照所述发送模块上报的所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下行链路控制信息DCI进行盲检；
    合并模块，用于在所述搜索模块按照所述聚合等级N对承载在两份物理下行控制信道PDCCH物理资源上的两个相同的DCI均盲检错误时，将所述两个相同的DCI进行频域数据合并；
    所述搜索模块，还用于按照所述聚合等级N对所述合并模块合并所述频域数据的结果进行盲检以获取所述基站下发的DCI。
  43. 如权利要求42所述的终端，其特征在于，所述发送模块还用于：
    向所述基站上报所述终端具备频域数据合并能力的消息；
    其中，所述消息提供给所述基站用于确定是否在所述聚合等级N的两份PDCCH物理资源上重复发送所述终端的DCI。
  44. 一种基站，其特征在于，包括：
    接收模块，用于接收终端上报的所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
    处理模块，用于将用于控制所述终端的下行链路控制信息DCI拆分为第一DCI和第二DCI；
    发送模块，用于将所述处理模块处理得到的所述第一DCI和所述第二DCI发送给所述终端；
    所述第一DCI和所述第二DCI分别承载在所述聚合等级N对应的两个不同的物理下行控制信道PDCCH物理资源上，所述第一DCI和第二CDI用于所述终端进行联合解析；所述N为自然数。
  45. 如权利要求44所述的基站，其特征在于，所述基站还包括：
    接收模块，用于接收所述终端上报的消息，根据所述消息确定所述终端具备频域数据合并能力。
  46. 如权利要求44所述的基站，其特征在于，所述处理模块还用于：
    获取所述终端的物理随机接入信道的前导码，根据所述前导码确定所述终端具备频域数据合并能力。
  47. 一种终端，其特征在于，包括：
    发送模块，用于向基站上报所述终端支持的至少一个聚合等级，所述至少一个聚合等级中包括聚合等级N；
    搜索模块，用于按照所述至少一个聚合等级中的各个聚合等级，对所述基站下发的下 行链路控制信息DCI进行盲检；
    处理模块，用于在所述搜索模块按照所述聚合等级N上对承载在两份物理下行控制信道PDCCH物理资源上的第一DCI和第二DCI均盲检正确时，将所述第一DCI和所述第二DCI进行联合组装以得到所述基站下发的DCI。
  48. 如权利要求47所述的终端，其特征在于，所述发送模块，还用于：
    向所述基站上报所述终端具备频域数据合并能力的消息。
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