CN113055123B - Blind detection method, system and terminal - Google Patents

Blind detection method, system and terminal Download PDF

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Publication number
CN113055123B
CN113055123B CN201911373847.3A CN201911373847A CN113055123B CN 113055123 B CN113055123 B CN 113055123B CN 201911373847 A CN201911373847 A CN 201911373847A CN 113055123 B CN113055123 B CN 113055123B
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cce aggregation
aggregation level
terminal
level
blind
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CN113055123A (en
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李路鹏
魏垚
黄庆涛
黄韬
陈秀敏
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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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
    • H04L1/0001—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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The disclosure relates to a blind detection method, a system and a terminal, and relates to the technical field of communication. The method of the present disclosure comprises: the terminal receives blind detection indication information sent by a base station, wherein the blind detection indication information comprises: controlling the judgment condition of the CCE aggregation level of the channel element and the selection range of the CCE aggregation level; wherein, the judgment condition comprises: judging the adopted signal; the terminal measures and judges the quality information of the adopted signal and sends the quality information to the base station so that the base station can determine CCE aggregation level according to the quality information; the terminal determines the CCE aggregation level of the current blind test and the current search space according to the quality information and the selection range of the CCE aggregation level; and the terminal performs blind detection in the current search space according to the CCE aggregation level of the current blind detection so as to complete the demodulation of the DCI.

Description

Blind detection method, system and terminal
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a blind detection method, system, and terminal.
Background
In a 5G NR (New Radio, New air interface) network, a PDCCH (Physical Downlink Control Channel) adapts to transmission of DCI (Downlink Control Information) with different aggregation levels by designing different numbers of CCEs (Control Channel elements), and for a terminal, the DCI starting position is unknown, and demodulation is attempted by blind detection.
In 5G, the PDCCH is improved, a CCE aggregation level is newly added, and the length is increased to 16 CCEs.
Disclosure of Invention
The inventor finds that: the terminal usually needs to be subjected to multiple blind tests to be successful, and especially under the conditions of large bandwidth of a 5G system and multiple CCE aggregation levels, the use experience of a user is affected due to the overlong blind test time, and meanwhile, the power consumption of the terminal is increased.
One technical problem to be solved by the present disclosure is: and improving the efficiency of the terminal for blind detection of the DCI.
According to some embodiments of the present disclosure, there is provided a blind inspection method, including: the terminal receives blind detection indication information sent by a base station, wherein the blind detection indication information comprises: controlling the judgment condition of the CCE aggregation level of the channel element and the selection range of the CCE aggregation level; wherein, the judgment condition comprises: judging the adopted signal; the terminal measures and judges the quality information of the adopted signal and sends the quality information to the base station so that the base station can determine CCE aggregation level according to the quality information; the terminal determines the CCE aggregation level of the current blind test and the current search space according to the quality information and the selection range of the CCE aggregation level; and the terminal performs blind detection in the current search space according to the CCE aggregation level of the current blind detection so as to complete the demodulation of the DCI.
In some embodiments, the selection range of the CCE aggregation level is determined by the base station according to the coverage of the cell in which the terminal is located; the larger the coverage of the cell is, the higher the CCE aggregation level corresponding to the selection range is.
In some embodiments, the determined condition further comprises: judging a preset corresponding relation between the quality range of the adopted signal and the CCE aggregation level; the terminal determines the CCE aggregation level of the current blind test according to the quality information and the selection range of the CCE aggregation level, and the determining comprises the following steps: the terminal determines the quality range to which the quality information belongs; and the terminal determines the CCE aggregation level of the current blind test according to the preset corresponding relation between the quality range and the CCE aggregation level and the selection range of the CCE aggregation level.
In some embodiments, further comprising: under the condition that the terminal fails to perform blind test in the current search space according to the CCE aggregation level of the current blind test, the terminal determines the priority of each other CCE aggregation level according to the level difference between the other CCE aggregation levels in the selection range of the CCE aggregation level and the CCE aggregation level of the current blind test; the terminal sequentially selects CCE aggregation levels according to the sequence of the priority levels of other CCE aggregation levels from high to low, and performs blind detection in the corresponding search space according to the selected CCE aggregation levels until the blind detection is successful or the preset number of blind detection times is reached; wherein different CCE aggregation levels correspond to different search spaces.
In some embodiments, the smaller the level difference with the CCE aggregation level of the current blind test, the higher the priority of other CCE aggregation levels; and in two other CCE aggregation levels with the same level difference as the CCE aggregation level of the current blind detection, the CCE aggregation level with the large number of CCEs has higher priority.
In some embodiments, the CCE aggregation level comprises: a first level where the number of CCEs is 1, a second level where the number of CCEs is 2, a third level where the number of CCEs is 4, a fourth level where the number of CCEs is 8, and a fifth level where the number of CCEs is 16.
In some embodiments, the signal used for the decision comprises: a channel state information reference signal, CSI-RS, a demodulation reference signal, DMRS, or a synchronization signal and physical broadcast channel block, SSB; the terminal receives the blind detection indication information through other system messages OSI.
According to further embodiments of the present disclosure, there is provided a terminal including: a receiving module, configured to receive blind detection indication information sent by a base station, where the blind detection indication information includes: controlling the judgment condition of the CCE aggregation level of the channel element and the selection range of the CCE aggregation level; wherein, the judgment condition comprises: judging the adopted signal; the measurement module is used for measuring the quality information of the signals adopted by the judgment and sending the quality information to the base station so that the base station can determine the CCE aggregation level according to the quality information; a determining module, configured to determine a CCE aggregation level of the current blind test and a current search space according to the quality information and a selection range of the CCE aggregation level; and the blind detection module is used for carrying out blind detection in the current search space according to the CCE aggregation level of the current blind detection so as to complete the demodulation of the DCI.
In some embodiments, the selection range of the CCE aggregation level is determined by the base station according to the coverage of the cell in which the terminal is located; the larger the coverage of the cell is, the higher the CCE aggregation level corresponding to the selection range is.
In some embodiments, the determined condition further comprises: judging a preset corresponding relation between the quality range of the adopted signal and the CCE aggregation level; the determining module is used for determining the quality range to which the quality information belongs; and determining the CCE aggregation level of the current blind test according to the preset corresponding relation between the quality range and the CCE aggregation level and the selection range of the CCE aggregation level.
In some embodiments, the blind test module is further configured to, when blind test in the current search space fails according to the CCE aggregation level of the current blind test, determine a priority of each of the other CCE aggregation levels according to a level difference between the other CCE aggregation levels within the selection range of the CCE aggregation levels and the CCE aggregation level of the current blind test; sequentially selecting CCE aggregation levels according to the sequence of the priority levels of other CCE aggregation levels from high to low, and performing blind detection in the corresponding search space according to the selected CCE aggregation levels until the blind detection is successful or the preset number of blind detection times is reached; wherein different CCE aggregation levels correspond to different search spaces.
In some embodiments, the smaller the level difference with the CCE aggregation level of the current blind test is, the higher the priority of other CCE aggregation levels is; and in two other CCE aggregation levels with the same level difference as the CCE aggregation level of the current blind detection, the CCE aggregation level with the large number of CCEs has higher priority.
In some embodiments, the CCE aggregation levels comprise: a first level where the number of CCEs is 1, a second level where the number of CCEs is 2, a third level where the number of CCEs is 4, a fourth level where the number of CCEs is 8, and a fifth level where the number of CCEs is 16.
In some embodiments, the signal used for the decision comprises: a channel state information reference signal, CSI-RS, a demodulation reference signal, DMRS, or a synchronization signal and physical broadcast channel block, SSB; the receiving module is used for receiving blind detection indication information through other system messages OSI.
According to still other embodiments of the present disclosure, there is provided a terminal including: a processor; and a memory coupled to the processor for storing instructions that, when executed by the processor, cause the processor to perform a blind detection method as in any of the preceding embodiments.
According to still further embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium having a computer program stored thereon, wherein the program when executed by a processor implements the steps of the blind detection method of any of the foregoing embodiments.
According to still other embodiments of the present disclosure, there is provided a blind inspection system including: the terminal of any of the preceding embodiments; and the base station is used for sending the blind test indication information to the terminal and determining the CCE aggregation level according to the quality information.
In the method, the base station sends the blind test indication information to the terminal, the blind test indication information comprises a CCE aggregation level judgment condition and a CCE aggregation level selection range, the terminal can measure the quality information of the signals adopted for judgment according to the CCE aggregation level judgment condition and send the quality information to the base station for determining the CCE aggregation level, meanwhile, the terminal can also determine the CCE aggregation level of the current blind test and the current search space according to the quality information of the signals adopted for judgment and the CCE aggregation level selection range, and the blind test is carried out in the current search space according to the CCE aggregation level of the current blind test so as to complete the demodulation of the downlink control information DCI. The base station sends the selection range of the CCE aggregation level and the judgment condition to the terminal, the terminal can estimate the CCE aggregation level and the corresponding search space according to the information, and can start blind detection from the most possible CCE aggregation level, thereby reducing the number of blind detection, reducing the complexity of blind detection, optimizing the PDCCH demodulation process, improving the efficiency of blind detection of DCI by the terminal, and simultaneously improving the user experience and the service life of the terminal battery.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 illustrates a flow diagram of a blind detection method of some embodiments of the present disclosure.
Fig. 2 shows a flow diagram of a blind detection method of further embodiments of the present disclosure.
Fig. 3 illustrates a schematic structural diagram of a terminal of some embodiments of the present disclosure.
Fig. 4 illustrates a schematic structural diagram of a terminal of some embodiments of the present disclosure.
Fig. 5 illustrates a schematic structural diagram of a terminal of some embodiments of the present disclosure.
Fig. 6 illustrates a structural schematic diagram of a blind inspection system of some embodiments of the present disclosure.
Fig. 7 illustrates a schematic diagram of a search space of some embodiments of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The present disclosure provides a blind inspection method, described below in conjunction with fig. 1.
Fig. 1 is a flow chart of some embodiments of a blind detection method of the present disclosure. As shown in fig. 1, the method of this embodiment includes: steps S102 to S108.
In step S102, the base station sends blind test indication information to the terminal, and correspondingly, the terminal receives the blind test indication information sent by the base station.
The base station may send the blind detection indication information to the terminal through OSI (Other System information), which is not limited to the illustrated example. OSI is a 5G physical layer concept, and contents including System messages except MIB (Master Information Block), RMSI (Remaining Minimum System Information), can be transmitted through RRC (Radio Resource Control) messages. The blind detection indication information includes, for example: the judgment condition of the CCE aggregation level and the selection range of the CCE aggregation level; the decision conditions include, for example: the type of signal employed is decided. The signal used for the decision is, for example, CSI-RS (channel state information reference signal), DMRS (demodulation reference signal), or SSB (synchronization signal and physical broadcast channel block), etc., and is not limited to the illustrated example. The signals adopted for judgment can be configured according to specific scenes, and the signals adopted for judgment of different base stations can be different.
In some embodiments, the selection range of the CCE aggregation level is determined by the base station according to the coverage of the cell in which the terminal is located. The base station may determine the size of the coverage area of the cell according to the cell parameter, for example, the base station may obtain the distance between the neighboring cells according to the network management information, so as to determine the size of the coverage area of the cell, and may also determine whether to use the existing information of the network, such as an extended CP (Cyclic Prefix), without being limited to the examples.
The CCE aggregation level indicates the number of consecutive CCEs occupied by the PDCCH, and includes, for example: a first level where the number of CCEs is 1, a second level where the number of CCEs is 2, a third level where the number of CCEs is 4, a fourth level where the number of CCEs is 8, and a fifth level where the number of CCEs is 16. The larger the coverage area of the cell is, the higher the CCE aggregation level corresponding to the selection area is, and the higher the lowest CCE aggregation or the highest CCE aggregation level corresponding to the selection area is. For example, if the cell belongs to urban coverage and the coverage is small, the CCE aggregation level is restricted to the use of the fourth level and the fifth level within the cell, and the CCE aggregation level is selected from the first level to the third level. If the cell belongs to a wide coverage (such as a grassland), the CCE aggregation level is limited to be used in a first level within the cell range, and the CCE aggregation level is selected from a second level to a fifth level. Specifically, the selection range of CCE aggregation levels corresponding to different coverage ranges may be configured according to the actual scene and the size covered by the cell.
In step S104, the terminal measures quality information of the signal used for the decision and transmits the quality information to the base station, so that the base station determines a CCE aggregation level based on the quality information.
The base station may send a signal to the terminal to make a decision, e.g., send a CSI-RS signal. The terminal measures and decides the quality information of the adopted signal according to the blind detection indication information, such as CQI (channel quality information) or SINR (signal to interference plus noise ratio), and the like, and can be configured according to actual requirements. And the terminal sends the judged signal quality information to the base station, and the base station determines the CCE aggregation level according to the judged signal quality information, wherein the determined CCE aggregation level is in the selection range of the CCE aggregation level. For different coverage areas or different application scenarios, different preset corresponding relationships between the quality ranges of the signals adopted for the decision and the CCE aggregation levels may be configured. For example, in a city coverage scenario, the CCE aggregation level corresponding to the CQI range a to b is the third level, while in a wide coverage scenario, the CCE aggregation level corresponding to the CQI range a to b is the second level.
In step S106, the terminal determines the CCE aggregation level of the current blind test and the current search space according to the quality information and the selection range of the CCE aggregation levels.
The terminal side can be pre-configured with a preset corresponding relation between the quality range of the signal adopted for judgment and the CCE aggregation level, the terminal can determine the CCE aggregation level of the current blind test according to the preset corresponding relation, and if the determined CCE aggregation level of the previous blind test does not belong to the selection range of the CCE aggregation level, the aggregation level closest to the determined CCE aggregation level of the previous blind test is selected from the selection range of the CCE aggregation level to serve as the CCE aggregation level of the previous blind test. Further, since the selection range of the CCE aggregation level may reflect a cell coverage range, an application scenario, or the like, the selection ranges of different CCE aggregation levels may correspond to preset correspondence between different quality ranges of the signal used for the decision and the CCE aggregation level, that is, the selection range of the CCE aggregation level, and the quality ranges of the signal used for the decision and the CCE aggregation level may form a correspondence, and the terminal may determine the CCE aggregation level according to the correspondence.
In some embodiments, the decision condition further comprises: and judging the preset corresponding relation between the quality range of the adopted signal and the CCE aggregation level. That is, the base station can directly send the preset corresponding relation between the quality range of the signal judged to be adopted and the CCE aggregation level to the terminal in the current scene, and the terminal determines the quality range to which the quality information belongs without configuring on the terminal side; and the terminal determines the CCE aggregation level of the current blind test according to the preset corresponding relation between the quality range and the CCE aggregation level and the selection range of the CCE aggregation level. The CCE aggregation level of the current blind detection is within the selection range of the CCE aggregation level. For example, the base station uses the CQI obtained by measuring the CSI-RS in the cell as a decision condition, where the CQI ranges from a to b for the third CCE aggregation level, from c to d for the second CCE aggregation level, from e to f for the first CCE aggregation level, and from a to e represent different CQI values. The base station may send the correspondence to the terminal, and the terminal may determine the CCE aggregation level of the current blind test.
In the above embodiment, the base station may flexibly configure the preset corresponding relationship according to different scenarios, and the base station also sends the preset corresponding relationship between the quality range of the signal adopted for judgment and the CCE aggregation level to the terminal, so that the blind detection efficiency of the terminal can be further improved.
Different CCE aggregation levels correspond to different search spaces, and as shown in fig. 7, only PDCCHs with a CCE aggregation level of a first level (CCE number 1) are configured in the first search space, only PDCCHs with a CCE aggregation level of a second level are configured in the second search space, and so on. Thus, the CCE aggregation level at which the current blind detection is determined may determine the current search space.
In step S108, the terminal performs blind detection in the current search space according to the CCE aggregation level of the current blind detection, so as to complete the demodulation of the DCI.
And the terminal determines the number and the initial position of the continuous CCEs according to the CCE aggregation level of the current blind detection, so that the continuous CCEs meeting the CCE number in the CCE aggregation level are detected in sequence from the initial position, and the CCEs corresponding to the PDCCH are determined to realize the demodulation of the DCI.
In the above embodiment, the base station sends the blind test indication information to the terminal, the blind test indication information includes a decision condition of the CCE aggregation level and a selection range of the CCE aggregation level, the terminal may measure quality information of a signal used for decision according to the decision condition of the CCE aggregation level, and send the quality information to the base station for determining the CCE aggregation level, and the terminal may also determine the CCE aggregation level of the current blind test and a current search space according to the quality information of the signal used for decision and the selection range of the CCE aggregation level, and perform blind test in the current search space according to the CCE aggregation level of the current blind test, so as to complete demodulation of the DCI. In the embodiment, the base station sends the selection range of the CCE aggregation level and the judgment condition to the terminal, the terminal can estimate the CCE aggregation level and the corresponding search space according to the information, and can start blind detection from the most possible CCE aggregation level, so that the blind detection times are reduced, the blind detection complexity is reduced, the PDCCH demodulation process is optimized, the efficiency of the terminal in blind detection of DCI is improved, and the user experience and the service life of a terminal battery are improved.
Further embodiments of the blind test method of the present disclosure are described below in conjunction with fig. 2.
Fig. 2 is a flow chart of other embodiments of a blind test method of the present disclosure. As shown in fig. 2, the method of this embodiment includes: steps S202 to S216.
In step S202, the base station transmits blind detection instruction information to the terminal.
The blind detection indication information comprises: the judgment condition of the CCE aggregation level and the selection range of the CCE aggregation level; wherein, the judgment condition comprises: and the quality ranges of the signals adopted for judgment and the signals adopted for judgment are in preset corresponding relation with the CCE aggregation level.
In step S204, the base station transmits a signal for decision to the terminal, and the terminal measures quality information of the signal for decision.
In step S206, the terminal transmits the quality information to the base station, and the base station determines a CCE aggregation level based on the quality information.
In step S207, the base station transmits a PDCCH to the terminal according to the determined CCE aggregation level.
In step S208, the terminal determines the CCE aggregation level of the current blind test and the current search space according to the quality information and the selection range of the CCE aggregation levels.
In step S210, the terminal performs blind test in the current search space according to the CCE aggregation level of the current blind test, determines whether the blind test is successful, if so, ends the process, otherwise, performs step S212.
In step S212, the terminal determines the priority of each other CCE aggregation level according to the level difference between the other CCE aggregation levels within the selection range of CCE aggregation levels and the CCE aggregation level of the current blind test.
In some embodiments, the smaller the level difference with the CCE aggregation level of the current blind test, the higher the priority of other CCE aggregation levels; and in two other CCE aggregation levels with the same level difference as the CCE aggregation level of the current blind detection, the CCE aggregation level with the large number of CCEs has higher priority. For example, if the CCE aggregation level of the current blind test is the third level, the second level and the fourth level have the smallest level difference with the CCE aggregation level of the current blind test, and the fourth level has a higher priority. This is because the number of CCEs at the fourth level is larger, and the number of blind detections in the corresponding search space is smaller. The CCE aggregation level with the current blind detection has the level difference of 2, namely the first level and the fifth level, and the fifth level has higher priority. Then if the selected range of CCE aggregation levels comprises: and the first level, the second level and the fifth level, wherein when the CCE aggregation level of the current blind detection is the third level, other CCE aggregation levels are 4, 1, 5 and 2 according to the priority level from high to low. Of course, the priority of each CCE aggregation level may be set in other manners, and is not limited to the illustrated example.
In step S214, the terminal selects one other CCE aggregation level in the order from high priority to low priority of each other CCE aggregation level, and determines a search space corresponding to the selected CCE aggregation level.
In step S216, the terminal performs blind test in the corresponding search space according to the selected CCE aggregation level, determines whether the blind test is successful or reaches the preset blind test number or whether all other CCE aggregation levels are tried, ends the process if the blind test is successful or reaches the preset blind test number or all other CCE aggregation levels are tried, or returns to step S214 to restart the execution.
Some application examples of the present disclosure are described below.
For example, if the cell in which the terminal is located is a city coverage scene, the base station notifies the terminal that CCE aggregation levels 4 and 5 are limited through the blind test indication information, that is, the selection range of the CCE aggregation levels is 1 to 3. In addition, the base station sends the judgment condition of the CCE aggregation level of the cell to the terminal, for example, the CQI obtained by measuring the CSI-RS is adopted as the judgment condition of the channel quality, and the range of the CQI is 0-4 corresponding to the CCE aggregation level 3, 5-9 corresponding to the CCE aggregation level 2, and 10-15 corresponding to the CCE aggregation level 1. And the base station sends the CSI-RS, the terminal feeds back channel quality information according to the measurement result, and the base station judges the current channel environment quality of the terminal so as to determine the CCE aggregation level adaptive to the terminal. For example, the terminal feeds back a CQI of the CSI-RS of 8, and the network determines that the CCE aggregation level of 2 is adopted for the terminal and performs scheduling in an urban environment.
The terminal can estimate the CCE aggregation level configured by the network according to the decision condition of the CCE aggregation level issued by the base station and the selection range of the CCE aggregation level. The terminal knows the current local channel quality information (CQI is 8), estimates the CCE aggregation level configured by the network to be 2, and preferentially tries to perform blind detection by using the aggregation level 2. The terminal cannot perform blind detection successfully by using the CCE aggregation level 2 of the current blind detection in the second search space, which indicates that the network does not use the aggregation level 2 for scheduling when scheduling the terminal (the network is only best effort and cannot perform scheduling completely according to rules), and the terminal performs blind detection again by using the nearest aggregation level in the nearest search space. For example, a search is performed in the third search space using CCE aggregation level 3. And sequentially selecting CCE aggregation levels according to the priority of each CCE aggregation level, and performing blind detection in the corresponding search space according to the selected CCE aggregation levels until the blind detection is successful or the maximum blind detection times are reached or all the available CCE aggregation levels are tried out.
In the method of the embodiment, the base station firstly utilizes the existing information to judge the cell coverage size, thereby limiting the use of part of CCE aggregation levels, and issuing the blind test indication information to the terminal. The terminal further estimates the CCE aggregation level configured by the network in advance according to the blind detection indication information and the channel quality, optimizes a blind detection algorithm, starts detection from the most possible CCE format, reduces the blind detection complexity, optimizes the PDCCH demodulation process, and improves the user experience and the service life of a terminal battery.
The present disclosure also provides a terminal, described below in conjunction with fig. 3.
Fig. 3 is a block diagram of some embodiments of the terminal of the present disclosure. As shown in fig. 3, the terminal 30 of this embodiment includes: the system comprises a receiving module 310, a measuring module 320, a determining module 330 and a blind detecting module 340.
The receiving module 310 is configured to receive blind test indication information sent by a base station, where the blind test indication information includes: controlling the judgment condition of the CCE aggregation level of the channel element and the selection range of the CCE aggregation level; wherein, the judgment condition comprises: the signal to be used is decided.
In some embodiments, the selection range of the CCE aggregation level is determined by the base station according to the coverage of the cell in which the terminal is located; the larger the coverage of the cell is, the higher the CCE aggregation level corresponding to the selection range is.
In some embodiments, the signal used for the decision comprises: a channel state information reference signal, CSI-RS, a demodulation reference signal, DMRS, or a synchronization signal and physical broadcast channel block, SSB; the receiving module 310 is configured to receive blind detection indication information through other system messages OSI.
The measuring module 320 is configured to measure quality information of the signal adopted for the decision and send the quality information to the base station, so that the base station determines the CCE aggregation level according to the quality information.
The determining module 330 is configured to determine a CCE aggregation level of the current blind test and a current search space according to the quality information and the selection range of the CCE aggregation level.
In some embodiments, the determined condition further comprises: judging a preset corresponding relation between the quality range of the adopted signal and the CCE aggregation level; the determining module 330 is configured to determine a quality range to which the quality information belongs; and determining the CCE aggregation level of the current blind test according to the preset corresponding relation between the quality range and the CCE aggregation level and the selection range of the CCE aggregation level.
The blind detection module 340 is configured to perform blind detection in the current search space according to the CCE aggregation level of the current blind detection, so as to complete demodulation of the downlink control information DCI.
In some embodiments, the blind test module 340 is further configured to, when blind test fails to be performed in the current search space according to the CCE aggregation level of the current blind test, determine a priority of each other CCE aggregation level according to a level difference between the other CCE aggregation levels within the selection range of the CCE aggregation levels and the CCE aggregation level of the current blind test; sequentially selecting CCE aggregation levels according to the sequence of the priority levels of other CCE aggregation levels from high to low, and performing blind detection in the corresponding search space according to the selected CCE aggregation levels until the blind detection is successful or the preset number of blind detection times is reached; wherein different CCE aggregation levels correspond to different search spaces.
In some embodiments, the smaller the level difference with the CCE aggregation level of the current blind test, the higher the priority of other CCE aggregation levels; and in two other CCE aggregation levels with the same level difference as the CCE aggregation level of the current blind detection, the CCE aggregation level with the large number of CCEs has higher priority.
In some embodiments, the CCE aggregation level comprises: a first level where the number of CCEs is 1, a second level where the number of CCEs is 2, a third level where the number of CCEs is 4, a fourth level where the number of CCEs is 8, and a fifth level where the number of CCEs is 16.
The terminals in the embodiments of the present disclosure may each be implemented by various computing devices or computer systems, which are described below in conjunction with fig. 4 and 5.
Fig. 4 is a block diagram of some embodiments of the terminal of the present disclosure. As shown in fig. 4, the terminal 40 of this embodiment includes: a memory 410 and a processor 420 coupled to the memory 410, the processor 420 configured to perform a blind detection method in any of the embodiments of the present disclosure based on instructions stored in the memory 410.
Memory 410 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), a database, and other programs.
Fig. 5 is a block diagram of further embodiments of the terminal of the present disclosure. As shown in fig. 5, the terminal 50 of this embodiment includes: memory 510 and processor 520 are similar to memory 410 and processor 420, respectively. An input output interface 530, a network interface 540, a storage interface 550, and the like may also be included. These interfaces 530, 540, 550 and the connections between the memory 510 and the processor 520 may be, for example, via a bus 560. The input/output interface 530 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 540 provides a connection interface for various networking devices, such as a database server or a cloud storage server. The storage interface 550 provides a connection interface for external storage devices such as an SD card and a usb disk.
The present disclosure also provides a blind inspection system, described below in conjunction with fig. 6.
Fig. 6 is a block diagram of some embodiments of blind inspection systems of the present disclosure. As shown in fig. 6, the system 6 of this embodiment includes: terminal 30/40/50 of any of the previous embodiments; and the base station 62 is configured to send blind detection indication information to the terminal 30/40/50, and determine a CCE aggregation level according to the quality information.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims (10)

1. A blind inspection method, comprising:
the method comprises the following steps that a terminal receives blind detection indication information sent by a base station, wherein the blind detection indication information comprises: controlling the judgment condition of the CCE aggregation level of the channel element and the selection range of the CCE aggregation level; wherein the decision condition comprises: judging the adopted signal; the selection range of the CCE aggregation level is determined by the base station according to the coverage range of the cell where the terminal is located, wherein the larger the coverage range of the cell is, the higher the CCE aggregation level corresponding to the selection range is;
the terminal measures the quality information of the signal adopted by the judgment and sends the quality information to the base station so that the base station can determine the CCE aggregation level according to the quality information;
the terminal determines the CCE aggregation level of the current blind test and the current search space according to the quality information and the selection range of the CCE aggregation level;
and the terminal performs blind detection in the current search space according to the CCE aggregation level of the current blind detection so as to complete the demodulation of the DCI.
2. The blind test method of claim 1,
the decision condition further includes: judging a preset corresponding relation between the quality range of the adopted signal and the CCE aggregation level;
the determining, by the terminal, the CCE aggregation level of the current blind test according to the quality information and the selection range of the CCE aggregation level includes:
the terminal determines the quality range to which the quality information belongs;
and the terminal determines the CCE aggregation level of the current blind test according to the preset corresponding relation between the quality range and the CCE aggregation level and the selection range of the CCE aggregation level.
3. The blind inspection method of claim 1, further comprising:
under the condition that the terminal fails to perform blind test in the current search space according to the CCE aggregation level of the current blind test, the terminal determines the priority of each other CCE aggregation level according to the level difference between the other CCE aggregation levels in the selection range of the CCE aggregation level and the CCE aggregation level of the current blind test;
the terminal sequentially selects CCE aggregation levels according to the sequence of the priority levels of other CCE aggregation levels from high to low, and performs blind detection in the corresponding search space according to the selected CCE aggregation levels until the blind detection is successful or the preset number of blind detection times is reached;
wherein different CCE aggregation levels correspond to different search spaces.
4. The blind test method of claim 3, wherein,
the smaller the grade difference with the CCE aggregation grade of the current blind test is, the higher the priority of the other CCE aggregation grades is;
and in the two other CCE aggregation levels with the same level difference as the CCE aggregation level of the current blind test, the CCE aggregation level with the large number of CCEs has higher priority.
5. The blind test method according to claim 1,
the CCE aggregation levels include: a first level where the number of CCEs is 1, a second level where the number of CCEs is 2, a third level where the number of CCEs is 4, a fourth level where the number of CCEs is 8, and a fifth level where the number of CCEs is 16.
6. The blind test method according to claim 1,
the signals adopted by the decision comprise: a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), or a synchronization signal and a physical broadcast channel block (SSB);
and the terminal receives the blind detection indication information through other system messages OSI.
7. A terminal, comprising:
a receiving module, configured to receive blind detection indication information sent by a base station, where the blind detection indication information includes: controlling the judgment condition of the CCE aggregation level of the channel element and the selection range of the CCE aggregation level; wherein the decision condition comprises: judging the adopted signal; the selection range of the CCE aggregation level is determined by the base station according to the coverage range of the cell where the terminal is located, wherein the larger the coverage range of the cell is, the higher the CCE aggregation level corresponding to the selection range is;
a measuring module, configured to measure quality information of the signal used for the decision, and send the quality information to the base station, so that the base station determines a CCE aggregation level according to the quality information;
a determining module, configured to determine a CCE aggregation level of a current blind test and a current search space according to the quality information and the selection range of the CCE aggregation level;
and the blind detection module is used for carrying out blind detection in the current search space according to the CCE aggregation level of the current blind detection so as to complete the demodulation of the downlink control information DCI.
8. A terminal, comprising:
a processor; and
a memory coupled to the processor for storing instructions that, when executed by the processor, cause the processor to perform the blind detection method of any of claims 1-6.
9. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, performs the steps of the blind detection method according to any one of claims 1 to 6.
10. A blind inspection system comprising:
the terminal of claim 7 or 8; and
and the base station is used for sending blind test indication information to the terminal and determining CCE aggregation level according to the quality information.
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