CN115038186A - Blind detection method and device of LTE (Long term evolution) system - Google Patents
Blind detection method and device of LTE (Long term evolution) system Download PDFInfo
- Publication number
- CN115038186A CN115038186A CN202210947524.6A CN202210947524A CN115038186A CN 115038186 A CN115038186 A CN 115038186A CN 202210947524 A CN202210947524 A CN 202210947524A CN 115038186 A CN115038186 A CN 115038186A
- Authority
- CN
- China
- Prior art keywords
- dci
- cce
- target
- information
- blind
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- 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 invention provides a blind detection method and a blind detection device of an LTE (Long term evolution) system, which relate to the technical field of fourth-generation wireless communication, and the method comprises the following steps: distributing the control channel element CCE to all candidate detection channels; acquiring network identification information of each candidate detection channel based on the CCE; and screening a target detection channel from all the candidate detection channels, acquiring Downlink Control Information (DCI) of the CCE after the network identification information verification is successful, and sending a reset message to other candidate detection channels for the other candidate detection channels to finish blind detection. The blind detection method and the blind detection device for the LTE system realize the USS blind detection of all DCI formats in parallel under the condition of unknown RNTI, and can further reduce the blind detection time of useless DCI formats and greatly improve the blind detection efficiency for a reset mechanism introduced into multiple channels.
Description
Technical Field
The invention relates to the technical field of fourth-generation wireless communication, in particular to a blind detection method and device of an LTE (long term evolution) system.
Background
The LTE system defines, for each User Equipment (UE), a Physical Downlink Control CHannel (PDCCH) candidate set, called a search space, to be detected when a Downlink Control Information (DCI) is parsed. When sending DCI to a UE, the base station selects an appropriate PDCCH in the search space of the UE according to the channel conditions and other factors for transmission.
Wherein, a UE Specific Search Space (USS) is used for transmitting UE terminal level control information related to a downlink shared channel, an uplink shared channel, and the like. The existing USS blind test technical scheme is that blind test is carried out on known Radio Network Temporary Identities (RNTIs) in a poor search mode, namely, a UE terminal respectively traverses and detects all PDCCH candidate sets according to the sequence of aggregation levels 1, 2, 4 and 8, the computed RNTIs are compared with RNTIs pre-allocated to users by a base station, if the computed RNTIs are different from the RNTIs pre-allocated to the users, the PDDCH candidate set is discarded, otherwise, the RNTI value of the PDDCH candidate set users is considered to be DCI sent to the UE by the base station. The method can only decode PDCCH under the condition of known RNTI, and can only detect the DCI of a certain UE in the subframe, so that the blind detection efficiency is low.
Disclosure of Invention
The invention provides a blind detection method and a blind detection device of an LTE (Long term evolution) system, which solve the defect that in the prior art, the PDCCH (physical downlink control channel) can be decoded only under the condition of known RNTI (radio network temporary identifier), so that the blind detection efficiency is low.
The invention provides a blind detection method of an LTE system, which comprises the following steps:
distributing the control channel element CCE to all candidate detection channels;
acquiring network identification information of each candidate detection channel based on the CCE;
screening out a target detection channel from all the candidate detection channels, wherein the target detection channel is used for acquiring Downlink Control Information (DCI) of the CCE after network identification information is successfully verified, and sending a reset message to other candidate detection channels for the other candidate detection channels to finish blind detection;
the CCE is extracted from a physical layer downlink control channel (PDCCH) in a UE specific search space (USS); the total number of the candidate detection channels is equal to the number of the DCI functional types; and the DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
According to the blind detection method of the LTE system provided by the present invention, after the acquiring the DCI of the CCE, the method further includes:
under the condition that the number of the acquired DCIs in the target detection channel is determined to be multiple, storing the DCI which is not matched with the DCI information sequence into the DCI information sequence;
outputting the DCI information sequence until all DCI information sequences are matched;
wherein the DCI information sequence at least includes a first obtained DCI in the target detection channel.
According to the blind inspection method of the LTE system, provided by the invention, the network identification information is verified, and the method specifically comprises the following steps:
determining a target CCE starting position based on the subframe number of the CCE, the network identification information of the candidate detection channel, the total number of the CCE and the aggregation level;
and under the condition that the collected CCE starting position is determined to be the same as the target CCE starting position, determining that the network identification information is verified successfully.
According to the blind detection method of the LTE system provided by the invention, the acquiring the network identification information of each candidate detection channel based on the CCE comprises the following steps:
acquiring a target bit sequence based on the CCE;
determining network identification information of the candidate detection channel based on a first subsequence and a second subsequence in the target bit sequence;
the first subsequence is a bit sequence related to the DCI, and the second subsequence is a scrambled CRC check bit sequence.
According to the blind detection method of the LTE system provided by the invention, the acquiring of the target bit sequence based on the CCE comprises the following steps:
determining DCI length based on the target information of the CCE;
after determining a solution rate corresponding to the DCI length, performing Viterbi decoding processing to obtain the target bit sequence;
wherein the target information at least comprises frame structure type information, bandwidth information, cell reference signal CRS port number information and DCI format information of the CCE; the DCI format information is matched with the DCI function corresponding to the candidate detection channel.
According to the blind detection method of the LTE system provided by the invention, the candidate detection channels comprise the candidate detection channel corresponding to the uplink DCI and the candidate detection channel corresponding to the downlink DCI.
According to the blind detection method of the LTE system provided by the present invention, before the step of distributing the control channel element CCE to all candidate detection channels, the method further includes:
under the condition that the main state machine is determined to be powered on, determining a target aggregation level based on the number of CCEs to be subjected to blind test;
sending scheduling request information carrying the target aggregation level to a target slave state machine so that the target slave state machine can perform blind detection on CCEs with the number corresponding to the target aggregation level;
wherein the target slave state machine is one of slave state machines for executing a CCE scheduling procedure preset corresponding to an aggregation level.
The invention also provides a blind detection device of the LTE system, which comprises the following steps:
a CCE distribution module for distributing the control channel element CCE to all the candidate detection channels;
a synchronous blind detection module, configured to obtain network identification information of each candidate detection channel based on the CCE;
a DCI obtaining module, configured to screen out a target detection channel from all the candidate detection channels, where the target detection channel is a downlink control information DCI of the CCE after successful verification of the network identification information, and send a reset message to other candidate detection channels, so that the other candidate detection channels end blind detection;
wherein the CCE is extracted from a physical layer downlink control channel PDCCH in a UE-specific search space USS; the total number of the candidate detection channels is equal to the number of the DCI functional types; and the DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel. The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the blind detection method of the LTE system.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the blind detection method of the LTE system as described in any one of the above.
The blind test method and the blind test device of the LTE system, provided by the invention, are used for analyzing the CCE and the candidate detection channels to obtain the RNTI value, taking the candidate detection channel which passes the RNTI value verification as a target detection channel, obtaining the DCI with the format corresponding to the target detection channel, resetting other candidate detection channels which are being detected, and ending the blind test process. The USS blind detection of all DCI formats is realized in parallel under the condition of unknown RNTI, the reset mechanism introduced into multiple channels can further reduce the blind detection time of useless DCI formats, and the blind detection efficiency is greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a blind detection method of an LTE system according to the present invention;
fig. 2 is a second schematic flowchart of a blind detection method of the LTE system according to the present invention;
fig. 3 is one of CCE scheduling flow diagrams of a blind detection method of an LTE system according to the present invention;
fig. 4 is a second schematic diagram of CCE scheduling process of a blind detection method of an LTE system according to the present invention;
fig. 5 is a third schematic diagram of a CCE scheduling process of a blind detection method of an LTE system according to the present invention;
fig. 6 is a fourth schematic diagram of a CCE scheduling process of a blind detection method of an LTE system according to the present invention;
fig. 7 is a schematic structural diagram of a blind detection apparatus of an LTE system provided by the present invention;
fig. 8 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Fig. 1 is a schematic flow chart of a blind detection method of an LTE system according to the present invention. As shown in fig. 1, a blind test method for an LTE system provided by the embodiment of the present invention includes: step 101, the control channel element CCE is distributed to all candidate detection channels.
Wherein the CCEs are extracted from a physical layer downlink control channel PDCCH in the UE-specific search space USS. The total number of candidate detection channels is equal to the number of downlink control information, DCI, functional categories.
It should be noted that the main execution body of the blind test method of the LTE system provided by the embodiment of the present invention is a blind test device of the LTE system. The blind detection device of the LTE system may be disposed on the user terminal, or the blind detection device of the LTE system is the user terminal.
The application scenario of the blind detection device of the LTE system is that the UE terminal decodes the CCE transmitted by the PDCCH according to the corresponding DCI format in a plurality of candidate detection channels, if the obtained RNTI value is valid, and if the result is verified, the DCI format is judged to belong to the UE terminal, and then the DCI is extracted, and the blind detection is successful.
It should be noted that, before step 101, the blind detection apparatus of the LTE system pre-opens candidate detection channels corresponding to different DCI formats in its inner space according to different DCI formats.
Specifically, in step 101, the blind detection apparatus of the LTE system determines the number of CCEs occupied by the PDCCH in one subframe in the USS, and then sequentially and simultaneously distributes each CCE to all candidate detection channels, so as to perform blind detection of different DCI formats synchronously.
102, acquiring network identification information of each candidate detection channel based on the CCE.
Specifically, in step 102, for any candidate detection channel, the blind detection apparatus of the LTE system performs corresponding analysis according to the CCE, calculates network identification information corresponding to the channel, and verifies whether the value is valid.
The embodiment of the present invention does not specifically limit the network identification information.
Illustratively, the Network identification information may be a Radio Network Temporary Identifier (RNTI).
The validity of the RNTI value is realized by comparing a path metric value Metrics generated in the calculation process with a local storage threshold, if the path metric value Metrics is larger than the local storage threshold, the verification of the RNTI can be carried out in the subsequent process after the current RNTI value is judged to be valid, otherwise, the current RNTI value is invalid, and the verification is not required to be carried out continuously.
And 103, screening a target detection channel from all the candidate detection channels, acquiring Downlink Control Information (DCI) of the CCE after the target detection channel is successfully verified for the network identification information, and sending a reset message to other candidate detection channels for the other candidate detection channels to finish blind detection.
The DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
Specifically, in step 103, the blind detection apparatus of the LTE system further determines whether the RNTI value is valid or not based on the determination that the RNTI value is valid. And under the condition that the RNTI value is determined to be true, taking the corresponding candidate detection channel as a target detection channel of an output result, acquiring the DCI corresponding to the target detection channel, and simultaneously sending a reset message to other candidate detection channels.
And other candidate detection channels receive and respond to the reset message, and end the blind detection process of the corresponding channel to wait for the next CCE to carry out blind detection.
For example, when the RNTI verification of a certain channel (i.e. the target detection channel) passes, a reset signal is generated to other candidate blind detection channels, and the other 10 candidate blind detection channels are immediately reset to stop the ongoing blind detection processing, i.e. the USS blind detection of this time is completed.
The embodiment of the invention analyzes the CCE and the candidate detection channel to obtain the RNTI value, takes the candidate detection channel verified by the RNTI value as the target detection channel, obtains the DCI with the format corresponding to the target detection channel, resets other candidate detection channels under detection, and ends the blind detection process. The USS blind detection of all DCI formats is realized in parallel under the condition of unknown RNTI, the reset mechanism introduced into multiple channels can further reduce the blind detection time of useless DCI formats, and the blind detection efficiency is greatly improved.
On the basis of any of the above embodiments, after acquiring DCI of a CCE, the method further includes: and under the condition that the number of the acquired DCIs in the target detection channel is determined to be multiple, storing the DCI which does not match with the DCI information sequence into the DCI information sequence.
And outputting the DCI information sequence until all DCIs are matched.
The DCI information sequence at least comprises first acquired DCI in a target detection channel.
The DCI information sequence refers to a storage number sequence dynamically maintained according to non-repetitive DCI. And the DCI information sequence at least comprises the acquired DCI of which the first DCI format corresponds to the target detection channel.
Specifically, after step 103, the blind detection apparatus of the LTE system obtains DCI of the DCI format corresponding to the target detection channel according to the RNTI value output by the target detection channel, and if it is determined that the DCI number is at least greater than 1, sequentially performs each piece of DCI with the stored DCI in the DCI information sequence, filters out DCI that can be matched with the DCI information sequence, stores the DCI that is not matched with the DCI information sequence into the DCI information sequence, until the comparison of all pieces of DCI is completed, and outputs the DCI in the DCI information sequence as a blind detection result.
For example, in the same subframe, it is possible to detect multiple repeated DCIs, that is, RNTI values, DCI formats, DCI lengths and DCI contents are all the same, assuming that RNTI verification of 6 DCIs (DCI 1-DCI 6) is successful, in order to achieve deduplication, a Random Access Memory (RAM) is used to store non-repeated DCIs, and a specific deduplication policy is as follows:
(1) when the DCI1-RNTI verification passes, the related information (RNTI value, DCI format, DCI length and DCI content) of the DCI1 is directly stored in a RAM (a storage space can also be provided in the form of a DCI sequence).
(2) When the DCI2-RNTI verification passes, firstly reading the relevant information of the DCI1 from the RAM, then comparing the relevant information with the relevant information of the DCI2, if the information is the same, considering that the DCI2 and the DCI1 are repeated, and discarding the DCI2, otherwise, considering that the DCI2 is different from the DCI1, and storing the relevant information of the DCI2 in the RAM.
(3) And similarly, judging whether the DCI3-DCI6 is repeated DCI, if so, discarding the repeated DCI, otherwise, storing the repeated DCI in the RAM, and after all the DCI are judged, finally storing all the DCI in the RAM in different ways, namely, achieving the purpose of removing the duplicate.
According to the embodiment of the invention, after a plurality of DCIs are detected in the subframe is determined according to the number of the acquired DCIs in the target detection channel, one DCI information sequence is dynamically maintained by comparing whether the DCI content is repeated or not, so that the same DCI is filtered out, and the influence on the working efficiency of a system caused by the fact that the same DCI enters for repeated analysis is avoided.
On the basis of any of the above embodiments, verifying the network identification information specifically includes: and determining the starting position of the target CCE based on the subframe number of the CCE, the network identification information of the candidate detection channel, the total number of the CCE and the aggregation level.
Specifically, after step 102, after determining that the RNTI value is valid, the blind test apparatus of the LTE system calculates a target CCE initial position in the PDCCH according to the subframe number of the CCE, the currently calculated network identifier information (e.g. RNTI), the total number of CCEs in the current PDCCH, and the current blind test aggregation level.
And under the condition that the acquired CCE starting position is the same as the target CCE starting position, determining that the verification of the network identification information is successful.
Specifically, the blind test device of the LTE system compares the calculated target CCE initial position with a CCE initial position acquired according to an actual situation, and if the target CCE initial position is equal to the actual CCE initial position, it indicates that the current network identification information (e.g., RNTI) is true, determines that the current candidate detection channel is the target detection channel, and outputs a blind test result. Otherwise, the current network identification information (e.g. RNTI) is considered as false, the current candidate detection channel is determined to be still a candidate detection channel, a response reset signal is waited for, and the corresponding blind detection is finished.
According to the embodiment of the invention, the target CCE starting position is determined based on the subframe number, the network identification information, the total number and the aggregation level of the CCE, and the comparison with the actual CCE starting position is carried out, so that all DCI under the subframe can be obtained by verifying the authenticity of the RNTI under the condition of unknown RNTI, and the blind detection efficiency is improved.
On the basis of any of the above embodiments, acquiring network identification information of each candidate detection channel based on the CCE includes: based on the CCE, a target bit sequence is obtained.
Specifically, in any candidate detection channel, the blind detection method of the LTE system decodes and converts the CCE into a binary code stream according to the DCI format corresponding to the channel, and obtains a target bit sequence.
And determining the network identification information of the candidate detection channel based on the first subsequence and the second subsequence in the target bit sequence.
The first subsequence is a bit sequence related to the DCI, and the second subsequence is a scrambled CRC check bit sequence.
It should be noted that, it is assumed that the target bit sequence is:
it comprises two subsequences, a first subsequence and a second subsequence, which are immediately consecutive.
Wherein the first subsequence is a bit sequence of the DCI,
. The second subsequence is a CRC check bit sequence scrambled by the RNTI,
。
specifically, the blind detection device of the LTE system detects the first subsequence
Divided by a CRC generator polynomial to obtain a CRC bit sequence of
Then according to a second subsequence
And the CRC bit sequence is
The 16-bit RNTI value can be obtained by carrying out XOR operation,
（
the most significant bit of the 16-bit RNTI).
According to the embodiment of the invention, the target bit sequence is obtained by binary decoding based on the CCE, and the XOR operation is carried out on the two subsequences in the target bit sequence, so that the RNTI value is calculated under the condition of unknown RNTI value, all DCI under the subframe is obtained under the condition that the RNTI value is effective and true, and the blind detection efficiency is improved.
On the basis of any of the above embodiments, acquiring a target bit sequence based on a CCE includes: the DCI length is determined based on target information of the CCE.
The target information at least comprises frame structure type information, bandwidth information, CRS port number information of cell reference signals and DCI format information of CCE. The DCI format information is matched with the DCI function corresponding to the candidate detection channel.
Specifically, in any candidate detection channel, the blind detection apparatus of the LTE system determines the DCI length according to the frame structure type, the bandwidth size, the CRS port number, and the DCI format, and jointly determines the DCI length corresponding to the channel in the USS.
And after determining the solution rate corresponding to the DCI length, carrying out Viterbi decoding processing to obtain a target bit sequence.
It should be noted that the de-rate matching is the inverse process of rate matching, and mainly includes a cyclic addition operation as opposed to bit collection and clipping and a de-interleaving operation as opposed to sub-interleaving.
Specifically, the blind detection device of the LTE system performs rate de-matching on the CCE according to the DCI length corresponding to the channel, and recovers the sequence length to the length corresponding to the encoded information sequence by using the viterbi decoding method, thereby obtaining the target bit sequence.
The embodiment of the invention determines the DCI length based on the frame structure type information, the bandwidth information, the CRS port number information of the cell reference signal and the DCI format information of the CCE, acquires the target bit sequence after decoding through the decoding rate and the Viterbi corresponding to the DCI length, and further calculates the RNTI value. The RNTI value calculation method for different DCI formats matching response under the condition of unknown RNTI is realized, and then all DCI under the subframe are obtained under the condition that the RNTI value is effective and true, so that the blind detection efficiency is improved.
On the basis of any of the above embodiments, the candidate detection channels include a candidate detection channel corresponding to the uplink DCI and a candidate detection channel corresponding to the downlink DCI.
Specifically, in the LTE system, the base station transmits DCI using PDCCH, and when transmitting DCI, the base station first selects a suitable PDCCH format and performs a series of processing on DCI data according to the PDCCH format, so that the DCI data becomes an information sequence satisfying the PDCCH transmission format. The DCI format is different and the control information carried is different, and the control information mainly relates to the information such as uplink scheduling request, downlink scheduling assignment, and terminal power control.
The DCI is mainly classified into 4 categories according to functions, as shown in table 1:
TABLE 1 DCI functional comparison Table
Since the uplink DCI is mainly used to indicate uplink PUSCH transmission, the USS blind test of the LTE system needs to set two candidate detection channels corresponding to the uplink DCI for controlling DCI-Format0/4 corresponding to the function of scheduling PUSCH in advance.
Similarly, the downlink DCI is mainly used to send downlink scheduling assignment information, so the USS blind test of the LTE system needs to set nine candidate detection channels corresponding to the downlink DCI in advance for the DCI-Format1/1A/1B/1C/1D/2/2A/2B/2C corresponding to the PDSCH scheduling function.
According to the embodiment of the invention, a plurality of candidate detection channels are correspondingly arranged for all uplink and downlink DCI formats of the USS, and the USS blind detection speed is effectively increased.
On the basis of any of the above embodiments, before distributing the control channel element CCE to all the candidate detection channels, the method further includes: and under the condition that the power on of the main state machine is determined, determining a target aggregation level based on the number of CCEs to be subjected to blind detection.
Specifically, the blind test device of the LTE system may also operate by relying on a field Programmable logic Array (FPGA), and a master state machine and a plurality of slave state machines are partitioned in a space in the FPGA.
And the master state machine is used for determining the aggregation level according to the CCE to be subjected to blind detection and controlling the corresponding slave state machine to execute resource scheduling of the aggregation level.
And the slave state machine is used for executing resource scheduling of the corresponding aggregation level.
Therefore, after the blind test device of the LTE system determines that the main state machine is powered on, the corresponding target aggregation level is determined according to the number of CCEs which are not subjected to blind test in the PDCCH-CCE storage space.
Wherein the target aggregation level is one of the aggregation levels. The aggregation level is determined according to the number of CCEs occupied by a single DCI, and comprises an aggregation level 1, an aggregation level 2, an aggregation level 4 and an aggregation level 8.
And sending the scheduling request information carrying the target aggregation level to a target slave state machine so that the target slave state machine can perform blind detection on CCEs with the number corresponding to the target aggregation level.
The target slave state machine is one of slave state machines, and the slave state machine is used for executing CCE scheduling procedures preset corresponding to aggregation levels.
The slave state machines are CCE scheduling steps provided in advance for aggregation levels, and the number of slave state machines matches the number of aggregation levels.
Specifically, the blind detection device of the LTE system sends scheduling request information carrying a target aggregation level to a corresponding target slave state machine in a master state machine.
And the target slave state machine receives and responds to the scheduling request information, applies for CCE blind test requests corresponding to the number of the target aggregation levels, sequentially enters a blind test processing flow, and immediately ends the blind test after all CCE blind tests are determined to be finished.
The embodiment of the present invention does not specifically limit the CCE scheduling process.
Fig. 2 is a second flowchart of the blind detection method of the LTE system according to the present invention. As shown in fig. 2, the main state machine implementation flow is as follows:
(1) and the main state machine determines the number of CCEs to be subjected to blind detection to obtain a target aggregation level.
(2) And determining which CCE scheduling of which aggregation level the CCE scheduling belongs to according to the sequence of the aggregation levels from low to high, and further determining which slave state machine from the slave state machines 1-4 is started.
(3) And finally, after the DCI blindly detected by each slave state machine is subjected to deduplication by using OR logic, feeding back a blindness detection ending signal to the master state machine so as to indicate the master state machine to execute a new round of blindness detection.
Fig. 3 is one of schematic diagrams of CCE scheduling procedures of a blind detection method of an LTE system according to the present invention. Fig. 4 is a second schematic diagram of the CCE scheduling process of the blind detection method of the LTE system according to the present invention. Fig. 5 is a third schematic diagram of a CCE scheduling process of the blind detection method of the LTE system according to the present invention. Fig. 6 is a fourth schematic diagram of a CCE scheduling process of a blind detection method of an LTE system according to the present invention. As shown in fig. 3-6, the flow of each slave state machine is as follows:
the function of the slave state machine 1 corresponding to the aggregation level 1 is to control the blind test of 1CCE data, when entering the slave state machine 1, firstly applying for 1CCE blind test request, then entering the blind test processing flow, and finally, when the blind test completion flag signal arrives, immediately ending the blind test.
The function of the slave state machine 2 corresponding to the aggregation level 2 is to control the blind detection of 2CCE data, when the slave state machine 2 enters, firstly, a 2CCE blind detection request is applied, and a blind detection processing flow is entered, when the 2CCE blind detection is successful, the blind detection is immediately ended, otherwise, the blind detection is required to be carried out on the first 1CCE data and the second 1CCE data in the 2CCE data.
The function of the slave state machine 3 corresponding to the aggregation level 4 is to control the blind detection of 4CCE data, when entering the slave state machine 3, firstly apply for a 4CCE blind detection request, and enter a blind detection processing flow, when the 4CCE blind detection is successful, the blind detection is immediately ended, otherwise, the blind detection is required to be performed on the first 2CCE data and the second 2CCE data in the 4CCE data.
The function of the slave state machine 4 corresponding to the aggregation level 8 is to control blind detection of 8CCE data, and when the slave state machine 4 enters the aggregation level 4/8/2/1, the blind detection is performed according to practical application experience, and the specific implementation steps are as follows:
(a) the 8CCE data is divided into two front and back 4CCE data, i.e., front 4CCE and back 4 CCE.
(b) Respectively carrying out blind detection on the front 4CCE data and the rear 4CCE data according to the aggregation level 4 to obtain two blind detection results, and carrying out the following processing according to the blind detection results in different situations:
case 1: and if the two groups of 4CCE data are successfully subjected to blind detection, ending the blind detection.
Case 2: and (c) if the blind detection of any group of 4CCE data is successful, entering the step (c).
Case 3: and (d) if the two groups of 4CCE data fail to be detected in a blind mode, entering the step (d).
(c) Dividing 4CCE data failed in blind test into front and back groups of 2CCE data for blind test according to aggregation level 2 to obtain two blind test results, and performing the following processing according to the blind test results:
case 1: and if the two groups of 2CCE data are successfully subjected to blind detection, ending the blind detection.
Case 2: and (e) if the blind detection of any group of 2CCE data fails, entering the step (e).
(d) And carrying out blind detection on the whole 8CCE data according to the aggregation level 8, and carrying out the following processing according to a blind detection result:
case 1: and if the whole 8CCE data is successfully subjected to blind test, finishing the blind test.
Case 2: and (f) if the whole 8CCE data fails to be detected in a blind mode, entering the step (f).
(e) Dividing all the 2CCE data failed in blind test into front and back 1CCE data, respectively carrying out blind test on the two groups of 1CCE data according to the aggregation level 1, and finishing the blind test after the blind test of all the 1CCE data is finished.
(f) Dividing the whole 8CCE data into 4 groups of 2CCE data, respectively carrying out blind detection on the 4 groups of 2CCE data according to an aggregation level 2, and carrying out the following processing according to the blind detection result in different situations:
case 1: and if the blind detection of the 4 groups of 2CCE data is successful, ending the blind detection.
Case 2: and (e) if the blind detection of any group of 2CCE data fails, entering the step (e).
In the embodiment of the invention, under the condition that the master state machine is powered on, the target aggregation level is determined based on the number of CCEs to be subjected to blind test, and the target slave state machine is driven to perform blind test on the CCEs with the number corresponding to the target aggregation level. Under the condition of unknown RNTI, USS blind detection of all DCI formats is realized in parallel, and blind detection efficiency and accuracy can be further improved by scheduling CCE resources.
Fig. 7 is a schematic structural diagram of a blind detection device of an LTE system provided by the present invention. On the basis of any of the above embodiments, as shown in fig. 7, the blind detection apparatus for an LTE system according to an embodiment of the present invention includes: a CCE distribution module 710, a synchronization blind detection module 720, and a DCI acquisition module 730, where:
a CCE distributing module 710 configured to distribute the control channel elements CCE to all candidate detection channels.
And a synchronous blind detection module 720, configured to obtain the network identification information of each candidate detection channel based on the CCE.
A DCI obtaining module 730, configured to screen out a target detection channel from all candidate detection channels, where the target detection channel is used to obtain downlink control information DCI of the CCE after successful verification of the network identification information, and send a reset message to other candidate detection channels, so that the other candidate detection channels finish blind detection.
Wherein the CCEs are extracted from a physical layer downlink control channel PDCCH in the UE-specific search space USS. The total number of candidate detection channels is equal to the number of DCI functional classes. The DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
Specifically, the CCE distributing module 710, the synchronization blind detection module 720 and the DCI acquiring module 730 are electrically connected in sequence.
In the USS, the CCE distributing module 710 determines the number of CCEs occupied by the PDCCH in one subframe, and then sequentially and simultaneously distributes each CCE to all candidate detection channels, so as to perform blind detection of different DCI formats in synchronization.
The synchronous blind test module 720 performs corresponding analysis on any candidate detection channel according to the CCE, calculates an RNTI value corresponding to the channel, and verifies whether the value is valid.
The DCI obtaining module 730 further determines whether the RNTI value is valid based on determining that the RNTI value is valid. And under the condition that the RNTI value is determined to be true, taking the corresponding candidate detection channel as a target detection channel of an output result, acquiring the DCI corresponding to the target detection channel, and simultaneously sending a reset message to other candidate detection channels.
Optionally, the blind detection apparatus of the LTE system further includes a DCI sequence updating module and a DCI deduplication module, where:
and the DCI sequence updating module is used for storing the DCI which is not matched with the DCI information sequence into the DCI information sequence under the condition that the number of the DCIs acquired in the target detection channel is determined to be multiple.
And the DCI deduplication module is used for outputting the DCI information sequence until all DCIs are matched.
The DCI information sequence at least comprises the first acquired DCI in the target detection channel.
Optionally, the blind detection apparatus of the LTE system further includes a CCE starting location determining module and an RNTI verifying module, where:
and the CCE starting position determining module is used for determining the target CCE starting position based on the subframe number of the CCE, the network identification information of the candidate detection channel, the total number of the CCE and the aggregation level.
And the RNTI verification module is used for determining that the verification of the network identification information is successful under the condition that the acquired CCE starting position is the same as the target CCE starting position.
Optionally, the synchronization blind detection module 720 includes a compiling unit and an RNTI value determining unit, wherein:
a coding unit, configured to obtain a target bit sequence based on the CCE.
And an RNTI value determining unit, configured to determine network identification information of the candidate detection channels based on the first subsequence and the second subsequence in the target bit sequence.
The first subsequence is a bit sequence related to the DCI, and the second subsequence is a scrambled CRC check bit sequence.
Optionally, the coding unit includes a DCI length determination subunit and a coding subunit, where:
and a DCI length determination subunit, configured to determine the DCI length based on the target information of the CCE.
And the coding subunit is used for performing Viterbi decoding processing after determining the decoding rate corresponding to the DCI length to acquire a target bit sequence.
The target information at least comprises frame structure type information, bandwidth information, CRS port number information of cell reference signals and DCI format information of CCE. The DCI format information is matched with the DCI function corresponding to the candidate detection channel.
Optionally, the candidate detection channels include a candidate detection channel corresponding to the uplink DCI and a candidate detection channel corresponding to the downlink DCI.
Optionally, the blind detection apparatus of the LTE system further includes an aggregation level confirmation module and a CCE scheduling module, where:
and the aggregation level confirmation module is used for determining a target aggregation level based on the number of CCEs to be subjected to blind detection under the condition of determining the power-on of the main state machine.
And the CCE scheduling module is used for sending the scheduling request information carrying the target aggregation level to the target slave state machine so that the target slave state machine can perform blind detection on the CCEs with the number corresponding to the target aggregation level.
The target slave state machine is one of slave state machines, and the slave state machine is used for executing CCE scheduling procedures preset corresponding to aggregation levels.
The embodiment of the invention analyzes the CCE and the candidate detection channel to obtain the RNTI value, takes the candidate detection channel verified by the RNTI value as the target detection channel, obtains the DCI with the format corresponding to the target detection channel, resets other candidate detection channels under detection, and ends the blind detection process. The USS blind detection of all DCI formats is realized in parallel under the condition of unknown RNTI, the blind detection time of useless DCI formats can be further reduced for a multi-channel introduced reset mechanism, and the blind detection efficiency is greatly improved.
Fig. 8 illustrates a physical structure diagram of an electronic device, and as shown in fig. 8, the electronic device may include: a processor (processor) 810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform a blind detection method for an LTE system, the method comprising: distributing the control channel element CCE to all candidate detection channels; acquiring network identification information of each candidate detection channel based on CCE; screening out a target detection channel from all candidate detection channels, acquiring Downlink Control Information (DCI) of the CCE after the network identification information verification of the target detection channel is successful, and sending a reset message to other candidate detection channels for the other candidate detection channels to finish blind detection; the CCE is extracted from a physical layer downlink control channel PDCCH in a UE specific search space USS; the total number of the candidate detection channels is equal to the number of the DCI functional types; the DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
In addition, the logic instructions in the memory 830 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, a computer can execute the blind inspection method of the LTE system provided by the above methods, where the method includes: distributing the control channel element CCE to all candidate detection channels; acquiring network identification information of each candidate detection channel based on CCE; screening out a target detection channel from all candidate detection channels, acquiring Downlink Control Information (DCI) of the CCE after the network identification information verification of the target detection channel is successful, and sending a reset message to other candidate detection channels for the other candidate detection channels to finish blind detection; the CCE is extracted from a physical layer downlink control channel PDCCH in a UE specific search space USS; the total number of candidate detection channels is equal to the number of DCI functional categories; the DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to perform the blind detection method of the LTE system provided by the above methods, the method including: distributing the control channel element CCE to all candidate detection channels; acquiring network identification information of each candidate detection channel based on CCE; screening out a target detection channel from all candidate detection channels, obtaining Downlink Control Information (DCI) of the CCE after the target detection channel is successfully verified for the network identification information, and sending a reset message to other candidate detection channels for the other candidate detection channels to finish blind detection; the CCE is extracted from a physical layer downlink control channel PDCCH in a UE specific search space USS; the total number of candidate detection channels is equal to the number of DCI functional categories; the DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A blind detection method of an LTE system is characterized by comprising the following steps:
distributing the control channel element CCE to all candidate detection channels;
acquiring network identification information of each candidate detection channel based on the CCE;
screening out a target detection channel from all the candidate detection channels, wherein the target detection channel is used for acquiring Downlink Control Information (DCI) of the CCE after network identification information is successfully verified, and sending a reset message to other candidate detection channels for the other candidate detection channels to finish blind detection;
wherein the CCE is extracted from a physical layer downlink control channel PDCCH in a UE-specific search space USS; the total number of the candidate detection channels is equal to the number of the DCI functional types; and the DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
2. The blind detection method for the LTE system according to claim 1, further comprising, after the acquiring the DCI for the CCE:
under the condition that the number of the acquired DCIs in the target detection channel is determined to be multiple, storing the DCI which is not matched with the DCI information sequence into the DCI information sequence;
outputting the DCI information sequence until all DCI information sequences are matched;
wherein the DCI information sequence at least includes a first obtained DCI in the target detection channel.
3. The blind test method for the LTE system according to claim 1, wherein verifying the network identification information specifically includes:
determining a target CCE starting position based on the subframe number of the CCE, the network identification information of the candidate detection channel, the total number of the CCE and the aggregation level;
and under the condition that the collected CCE starting position is determined to be the same as the target CCE starting position, determining that the network identification information is verified successfully.
4. The blind detection method of the LTE system according to claim 1 or 2, wherein the obtaining the network identification information of each of the candidate detection channels based on the CCEs comprises:
acquiring a target bit sequence based on the CCE;
determining network identification information of the candidate detection channel based on a first subsequence and a second subsequence in the target bit sequence;
the first subsequence is a bit sequence related to the DCI, and the second subsequence is a scrambled CRC check bit sequence.
5. The blind detection method for the LTE system according to claim 4, wherein said obtaining the target bit sequence based on the CCE comprises:
determining DCI length based on the target information of the CCE;
after determining a solution rate corresponding to the DCI length, performing Viterbi decoding processing to obtain the target bit sequence;
wherein the target information at least comprises frame structure type information, bandwidth information, cell reference signal CRS port number information and DCI format information of the CCE; the DCI format information is matched with the DCI function corresponding to the candidate detection channel.
6. The blind detection method of the LTE system according to claim 1, wherein the candidate detection channels include a candidate detection channel corresponding to uplink DCI and a candidate detection channel corresponding to downlink DCI.
7. The blind detection method in the LTE system according to claim 1, wherein before the distributing the control channel elements CCE to all candidate detection channels, further comprises:
under the condition that the main state machine is determined to be powered on, determining a target aggregation level based on the number of CCEs to be subjected to blind test;
sending scheduling request information carrying the target aggregation level to a target slave state machine so that the target slave state machine can perform blind detection on CCEs (control channel elements) with the number corresponding to the target aggregation level;
wherein the target slave state machine is one of slave state machines for executing a CCE scheduling procedure set in advance corresponding to an aggregation level.
8. A blind detection device of an LTE system is characterized by comprising:
a CCE distribution module for distributing the control channel element CCE to all the candidate detection channels;
a synchronous blind detection module, configured to obtain network identification information of each candidate detection channel based on the CCE;
a DCI obtaining module, configured to screen out a target detection channel from all the candidate detection channels, where the target detection channel is a downlink control information DCI of the CCE after successful verification of the network identification information, and send a reset message to other candidate detection channels, so that the other candidate detection channels end blind detection;
wherein the CCE is extracted from a physical layer downlink control channel PDCCH in a UE-specific search space USS; the total number of the candidate detection channels is equal to the number of the DCI functional types; and the DCI is analyzed according to the information format of the DCI function corresponding to the target detection channel.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the blind detection method of the LTE system according to any one of claims 1 to 7 when executing the program.
10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the blind detection method of the LTE system according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210947524.6A CN115038186B (en) | 2022-08-09 | 2022-08-09 | Blind detection method and device of LTE (Long term evolution) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210947524.6A CN115038186B (en) | 2022-08-09 | 2022-08-09 | Blind detection method and device of LTE (Long term evolution) system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115038186A true CN115038186A (en) | 2022-09-09 |
| CN115038186B CN115038186B (en) | 2022-11-01 |
Family
ID=83131075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210947524.6A Active CN115038186B (en) | 2022-08-09 | 2022-08-09 | Blind detection method and device of LTE (Long term evolution) system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115038186B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011120251A1 (en) * | 2010-04-01 | 2011-10-06 | 中兴通讯股份有限公司 | Blind detection apparatus and method |
| CN103780343A (en) * | 2014-01-13 | 2014-05-07 | 重庆邮电大学 | Device and method for PHICH resource blind detection in SIB1 decoding in TD-LTE system |
| US20150264665A1 (en) * | 2014-03-15 | 2015-09-17 | Sierra Wireless, Inc. | Abbreviated blind detection in wireless communication systems including lte |
| CN105991218A (en) * | 2015-02-02 | 2016-10-05 | 中国电信股份有限公司 | PDCCH blind detection method and system, and terminal |
| WO2016197472A1 (en) * | 2015-06-08 | 2016-12-15 | 深圳市中兴微电子技术有限公司 | Method and device for processing enhanced physical downlink control channel, and storage medium |
| CN108418657A (en) * | 2018-02-07 | 2018-08-17 | 广州慧睿思通信息科技有限公司 | The determination method of DCI format and transmission mode in a kind of LTE system |
| CN109787710A (en) * | 2017-11-14 | 2019-05-21 | 深圳市中兴微电子技术有限公司 | A kind of blind checking method and device, computer readable storage medium |
| US20190357182A1 (en) * | 2017-01-05 | 2019-11-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for transmitting downlink control information |
| CN110831020A (en) * | 2018-08-10 | 2020-02-21 | 华为技术有限公司 | Method for detecting DCI (Downlink control information), method for configuring PDCCH (physical Downlink control channel) and communication device |
| CN110855587A (en) * | 2019-11-19 | 2020-02-28 | 重庆邮电大学 | Blind detection method for downlink control channel of 5G system |
| CN112751649A (en) * | 2020-12-17 | 2021-05-04 | 武汉虹旭信息技术有限责任公司 | Physical downlink control channel blind detection method and device |
| WO2022022540A1 (en) * | 2020-07-30 | 2022-02-03 | 中兴通讯股份有限公司 | Dci acquisition method and apparatus, and storage medium |
| CN114362886A (en) * | 2022-01-11 | 2022-04-15 | 赛特斯信息科技股份有限公司 | Terminal PDCCH blind detection method based on aggregation level estimation |
| CN114696962A (en) * | 2022-06-02 | 2022-07-01 | 杰创智能科技股份有限公司 | Blind detection method, device, equipment and medium based on unknown RNTI |
-
2022
- 2022-08-09 CN CN202210947524.6A patent/CN115038186B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011120251A1 (en) * | 2010-04-01 | 2011-10-06 | 中兴通讯股份有限公司 | Blind detection apparatus and method |
| CN103780343A (en) * | 2014-01-13 | 2014-05-07 | 重庆邮电大学 | Device and method for PHICH resource blind detection in SIB1 decoding in TD-LTE system |
| US20150264665A1 (en) * | 2014-03-15 | 2015-09-17 | Sierra Wireless, Inc. | Abbreviated blind detection in wireless communication systems including lte |
| CN105991218A (en) * | 2015-02-02 | 2016-10-05 | 中国电信股份有限公司 | PDCCH blind detection method and system, and terminal |
| WO2016197472A1 (en) * | 2015-06-08 | 2016-12-15 | 深圳市中兴微电子技术有限公司 | Method and device for processing enhanced physical downlink control channel, and storage medium |
| US20190357182A1 (en) * | 2017-01-05 | 2019-11-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for transmitting downlink control information |
| CN109787710A (en) * | 2017-11-14 | 2019-05-21 | 深圳市中兴微电子技术有限公司 | A kind of blind checking method and device, computer readable storage medium |
| CN108418657A (en) * | 2018-02-07 | 2018-08-17 | 广州慧睿思通信息科技有限公司 | The determination method of DCI format and transmission mode in a kind of LTE system |
| CN110831020A (en) * | 2018-08-10 | 2020-02-21 | 华为技术有限公司 | Method for detecting DCI (Downlink control information), method for configuring PDCCH (physical Downlink control channel) and communication device |
| CN110855587A (en) * | 2019-11-19 | 2020-02-28 | 重庆邮电大学 | Blind detection method for downlink control channel of 5G system |
| WO2022022540A1 (en) * | 2020-07-30 | 2022-02-03 | 中兴通讯股份有限公司 | Dci acquisition method and apparatus, and storage medium |
| CN112751649A (en) * | 2020-12-17 | 2021-05-04 | 武汉虹旭信息技术有限责任公司 | Physical downlink control channel blind detection method and device |
| CN114362886A (en) * | 2022-01-11 | 2022-04-15 | 赛特斯信息科技股份有限公司 | Terminal PDCCH blind detection method based on aggregation level estimation |
| CN114696962A (en) * | 2022-06-02 | 2022-07-01 | 杰创智能科技股份有限公司 | Blind detection method, device, equipment and medium based on unknown RNTI |
Non-Patent Citations (1)
| Title |
|---|
| SONY: "R1-1912357 "On PDCCH-based power saving channel for UE power saving"", 《3GPP TSG_RAN\WG1_RL1》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115038186B (en) | 2022-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9172504B2 (en) | Method, apparatus and system for downlink channel transmission | |
| CN102215183B (en) | Blind detection device and method | |
| CN105680996B (en) | PDCCH blind checking method in a kind of LTE system | |
| KR102241066B1 (en) | Random access transmission method, receiving method and apparatus, transmitting end and receiving end | |
| WO2014075239A1 (en) | Triggering method and related device | |
| CN105897373A (en) | Method and system for transmitting transmission block in downlink control channel | |
| EP2753126A1 (en) | Downlink control information sending method, blind detection method, base station and terminal equipment | |
| CN107852272A (en) | Method and associated mobile device for quick blind decoding | |
| WO2009076371A1 (en) | Hierarchical crc scheme | |
| CN112260798B (en) | Physical layer control channel blind detection method based on polarization code | |
| CN112602279B (en) | Radio downlink information | |
| CN112751649A (en) | Physical downlink control channel blind detection method and device | |
| CN111726878A (en) | Method and device for detecting downlink control information | |
| CN105703875B (en) | Method, equipment and system for transmitting message | |
| CN115052358B (en) | PDCCH blind detection method, device, electronic equipment and storage medium | |
| CN115038186B (en) | Blind detection method and device of LTE (Long term evolution) system | |
| US20200266925A1 (en) | Channel signal decoding with unknown station identifier information using power detection and redundancy reduction-based error checking | |
| CN108633025B (en) | Beam recovery method and device | |
| CN109952730A (en) | It is decoded using power detection with the channel signal of the unknown identification information of station of the error-tested based on redundancy reduction | |
| US11089495B2 (en) | Methods, systems, and computer readable media for testing radio access network nodes by emulating band-limited radio frequency (RF) and numerology-capable UEs in a wideband 5G network | |
| CN115426714B (en) | Passive positioning method and device, electronic equipment and storage medium | |
| CN117335930B (en) | Multi-cell blind detection method, device and storage medium | |
| CN115567168B (en) | PDCCH blind detection implementation method and device and electronic equipment | |
| CN113453165B (en) | Method and device for sending SC-MCCH (Single Carrier-multicast control channel) scheduling information in NR (non-reciprocal) cell | |
| CN115173996B (en) | Blind detection processing method and device, computer equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |