WO2012159368A1

WO2012159368A1 - Blind detection method and device

Info

Publication number: WO2012159368A1
Application number: PCT/CN2011/078067
Authority: WO
Inventors: 葛陆泉; 矫渊培
Original assignee: 华为技术有限公司
Priority date: 2011-08-05
Filing date: 2011-08-05
Publication date: 2012-11-29
Also published as: CN103039104A; CN103039104B

Abstract

Provided are a blind detection method and device. The method includes: determining a length combination including at least one length of a DCI; acquiring at least one piece of first resource information according to the at least one length of the DCI and the resource length occupied by PDCCH information; correspondingly acquiring at least one piece of second resource information for characterizing the DCI according to the at least one piece of first resource information; and combining the second resource information with the same RNTI and the same DCI length in the at least one piece of second resource information as a blind detection result. The technical solution in the embodiments of the present invention can effectively reduce the number of blind detection times and improve the blind detection efficiency in the test tool for a terminal to simulate a plurality of users.

Description

Blind detection method and device

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a blind detection method and apparatus. Background technique

In the downlink service data transmission of the Long Term Evolution (LTE) system, the downlink control information of the User Equipment (hereinafter referred to as UE) is carried by the Physical Downlink Control Channel (hereinafter referred to as PDCCH). (Downlink Control Information; hereinafter referred to as DCI). The DCI format ( format ) includes 1,1A, 1B, 1D, 2, 2A, 2B, and so on. Each DCI Format may have a different Control Channel Element (CCE) length, and the CCE is the smallest unit that constitutes the PDCCH resource allocation. Generally, each PDCCH information occupies a resource that can occupy 1, 2, 4, or 8 CCEs. Corresponding PDCCH has 4 aggregation levels, which are 1, 2, 4, and 8, respectively.

Generally, the base station determines the aggregation level to be used for the transmission of the DCI according to the resource usage, and then calculates the CCE resource occupied by the DCI according to the Radio Network Temporary Identifier (RNTI) and the subframe number information. The location in space. According to the aggregation level, the coded and cyclic redundancy check (CRC) and the RNTI masked DCI are rate matched, and the processed DCI information is mapped to the air interface resource for transmission. On the UE side, the UE should calculate the search space where the PDCCH is located according to the current RNTI and the subframe number information. Then, through the blind detection method, all the chance windows in the search space are traversed according to different aggregation levels in the calculated search space. Search for the correct location of the DCI information and get the DCI information.

In the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art: The blind detection method is a method of using a single user scenario. In a multi-user test scenario, if a terminal is used to simulate multiple user tests, then each user is blindly checked according to the above prior art method, so that the total number of blind checks will be proportional to the number of users. , greatly increasing the complexity of blind inspection. Summary of the invention

The embodiment of the invention provides a blind detection method and device, which is used to solve the defect that the existing blind detection method has high complexity in the scenario of the multi-user test tool, and provides a blindness that does not distinguish between users and is more efficient. Detection plan. An embodiment of the present invention provides a blind detection method, including:

Determining a length combination of the downlink control information, where the length combination of the downlink control information includes at least one length of the downlink control information;

Acquiring at least one first resource information according to at least one length of the downlink control information and a resource length occupied by the physical downlink control channel information in the control channel unit resource space; acquiring corresponding information according to the at least one first resource information At least one second resource information that characterizes the downlink control information;

And combining, in the at least one second resource information, the second resource information with the same radio network temporary identifier and the same length of the downlink control information as a result of blind detection.

An embodiment of the present invention provides a blind detection apparatus, including:

a determining module, configured to determine a length combination of the downlink control information, where the length combination of the downlink control information includes at least one length of the downlink control information;

a search module, configured to acquire at least one first resource information according to at least one length of the downlink control information and a resource length occupied by physical downlink control channel information;

An acquiring module, configured to acquire, according to the at least one first resource information, a corresponding second resource information that is used to represent the downlink control information; The merging module is configured to combine the second resource information of the at least one second resource information that has the same radio network temporary identifier and the same length of the downlink control information as a result of the blind detection.

The blind detection method and device of the embodiment of the present invention, by combining the length of the downlink control information, the length combination of the downlink control information includes at least one length of the downlink control information; in the control channel unit resource space, according to the Acquiring at least one length of the downlink control information and the resource length occupied by the physical downlink control channel information to obtain at least one first resource information; acquiring, according to the at least one first resource information, at least one corresponding to the downlink control information And the second resource information of the at least one second resource information that is the same as the radio network temporary identifier and the length of the downlink control information is the same as the result of the blind detection. Compared with the prior art, the technical solution of the embodiment of the present invention does not need to distinguish users, and in the scenario where the number of users is more than 100, the number of blind detections can be effectively reduced, the blind detection delay is shortened, and the blind detection efficiency is improved. . DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

FIG. 1 is a flowchart of a blind detection method according to an embodiment of the present invention.

FIG. 2 is a flowchart of a blind detection method according to another embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a blind detecting apparatus according to an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a blind detecting apparatus according to another embodiment of the present invention. detailed description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention are clearly and completely described in the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the LTE system, the search space where the PDCCH is located (that is, all possible options for PDCCH blind detection) is divided into two categories: Common Search Space (CSS) and Specific Search Space (hereinafter referred to as SSS). ). The PDCCH information contained in the CSS is public information for all users. SSS is a user-specific search space, and the information contained is only valid for the user. For some users, their CSS overlaps with the current SSS. There are also cases where the SSS of some users overlaps with the SSS of other users. When blind detection is performed on the UE side, information in both spaces needs to be detected. Table 1 below shows the aggregation level of two search spaces, the total number of CCEs in which the PDCCH is placed, and the number of PDCCH bit candidates.

Table 1

As shown in Table 1. The first column of Table 1 is the search space type. The second column of Table 1 is the corresponding aggregation level under the search space type corresponding to the first column. The value of the aggregation level is equal to the number of CCE resources occupied by the PDCCH information formed by the DCI on the base station side by convolutional coding. The length of the PDCCH information here is the information length in CCE, for example, the aggregation level is 4. The length of the PDCCH information after DCI coding is 4 CCEs. The third column of Table 1 is the total number of CCEs of all possible PDCCHs corresponding to the PDCCH length after determining the value corresponding to the aggregation level of the second column. Column 4 of Table 1 shows the number of possible locations placed for each PDCCH. The third column in Table 1 is the product of the second column and the fourth column.

FIG. 1 is a flowchart of a blind detection method according to an embodiment of the present invention. The execution subject of the blind detection method of this embodiment may be a blind detection device. As shown in FIG. 1, the blind detection method in this embodiment may specifically include the following:

100. Determine a length combination of the DCI, where the length combination of the DCI includes at least one length of the DCI;

The length combination herein includes at least one length that the DCI may appear.

And acquiring, in the CCE resource space, at least one first resource information according to at least one length of the DCI and a resource length occupied by the PDCCH information;

The length of the resource occupied by the PDCCH information specifically refers to the length of the CCE occupied by the PDCCH information in the CCE resource space. For example, the CCE may be 1, 2, 4 or 8 CCEs in this embodiment. That is to say, the PDCCH occupies 1, 2, 4 or 8 CCEs in the CCE resource space. Here, the resource length value occupied by the PDCCH information is equal to the value of the aggregation level of the corresponding PDCCH. Therefore, it can also be said that at least one first resource information is acquired according to at least one length of the DCI and a convergence level value of the PDCCH. The CCE resource here refers to the entire CCE resource space.

102. Acquire, according to the at least one first resource information, a corresponding at least one second resource information used to represent the DCI.

The first resource information acquired on the receiving end side is PDCCH information or PDCCH information fragment obtained by processing the DCI information on the transmitting side. Therefore, for each first resource information, the second resource information corresponding to the DCI can be obtained according to the first resource information.

103. The first RNTI of the at least one second resource information is the same and the length of the DCI is the same. The two resource information are combined as a result of blind detection.

The application scenario of the embodiment is performed on the receiving end side of the LTE system. The execution body of the blind detection method in this embodiment may specifically be a blind detecting device. The blind detection method of this embodiment can be applied to a test tool for simulating multi-user testing by a terminal (such as a UE) in an LTE system. For example, the execution subject blind detection apparatus of this embodiment can be provided in the terminal capable of simulating a plurality of users.

Compared with the prior art, the technical solution of the embodiment does not need to distinguish users, and in the scenario of simulating a multi-user test tool, for example, the number of simulated users is greater than 100, the number of blind detections can be effectively reduced, and the blind detection delay can be shortened. Improve the efficiency of blind inspection.

Optionally, on the basis of the technical solution of the foregoing embodiment, the obtaining, by the at least one first resource information, the corresponding at least one second resource information used to represent the DCI, specifically includes: at least one length of the DCI And searching for the resource length occupied by the PDCCH information as a search condition in the CCE resource space, and acquiring at least one first resource information.

Optionally, based on the technical solution of the foregoing embodiment, before 102, before 103, the method further includes performing false alarm detection on the at least one second resource information.

Optionally, performing false alarm detection on the at least one second resource information, specifically:

(1) for each second resource information, acquiring a search space according to the RNTI and the subframe number; (2) determining whether the location of the first resource information corresponding to the second resource information in the CCE resource space is (1) the search obtained In the space; if not, it is determined that the false alarm detection fails; otherwise, when it is, it is determined that the false alarm detection passes.

Further, optionally, in the foregoing step (2), when it is determined that the false alarm detection fails, the method further includes: discarding the second resource information that the false alarm detection fails.

It should be noted that, in the foregoing embodiment, determining the length combination of the DCI may be performed without a fixed transmission mode between the UE and the base station. According to the LTE physical protocol, it can be known that when the transmission mode between the tested base station and the UE is uncertain, at this time, there can be at most seven DCI lengths in the length combination of the DCI. For details, please refer to the DCI shown in Tables 3 to 9 below. length. The DCI 1C corresponding to Table 6 can only exist in the CSS, and the DCI length corresponding to the DCI1C can be blindly checked only in the CSS when searching. Since SSS and CSS can overlap, searching for the length of the other six DCIs may exist in SSS or CSS, so search through the entire search space.

Optionally, when there is a fixed transmission mode between the base station and the UE, since each transmission mode corresponds to two DCI formats in the SSS, each DCI format can know the length of the corresponding DCI. Therefore, the blind detection apparatus may further refer to a transmission mode between the current base station and the UE, and determine a length combination of the DCI in combination with at least one parameter of the currently tested LTE system, the number of antennas of the tested base station, and the bandwidth information of the network where the base station is located. . The format of the LTE system may be Time Division Duplexing (TDD) or Frequency Division Duplexing (FDD). After the base station is built, the format of the corresponding LTE system, the number of antennas of the base station, and the bandwidth information of the network where the base station is located can be determined. For the four parameter information of the transmission mode between the base station and the UE, the standard of the LTE system, the number of antennas of the base station, and the bandwidth information of the network where the base station is located, the more parameter information obtained by the blind detection device can be obtained in the length combination of the DCI. The smaller the number of DCI lengths included, the more accurate the length combination of the acquired DCI.

Table 2 shows the correspondence between the partial transmission mode of SSS and the DCI format.

Table 2

Transmission mode 7 Ι,ΙΑ

Transmission mode 8 2Β, 1Α

The left column in Table 2 shows the transmission mode. For example, transmission mode 1 can be configured as a single antenna (PortO) transmission mode, and transmission mode 2 can be configured as a transmission mode (Transmit diversity). Transmission mode 3 can be configured as a transmission mode of Open-loop spatial multiplexing. Transmission mode 4 can be configured as closed-loop space division multiplexing

(Closed-loop spatial multiplexing) transmission mode. Transmission mode 5 can be configured for multi-user multi-user MIMO) transmission mode. Transmission mode 6 can be configured as a closed-looped Rank=l precoding (Prcoding) transmission mode. Transmission mode 7 can be configured with single antenna port 0 or transmit diversity; transmission mode 8 can be configured with single antenna port 0 or transmit diversity, closed loop space division multiplexing, and so on. The right column in Table 2 shows the DCI format. For example, Ι, ΙΑ, ΙΒ, 1D, 2, 2A, 2B. The DCI format is indicated separately. In addition to the DCI format appearing in the above SSS, there are three DCI formats of 1C, 3, and 3A in the CSS. Each DCI format corresponds to a DCI length. Different LTE standards and different bandwidths And a different DCI format corresponding to different DCI lengths of the base station. The DCI length may also be referred to as a DCI payload size. Tables 3 - 9 below detail different DCI formats corresponding to various scenarios. The payload size of the DCI. The following table 3 - Table 9 takes the 16-bit CRC bit in the DCI payload as an example.

table 3

The DCI formats shown in Table 3 above for different bandwidth values and different LTE systems are 0, 1A, 3, 3A payload sizes, respectively. Columns 2 to 7 of the first row indicate different bandwidth values; column 1 of the second row indicates that the LTE system is FDD, and the second row is the second to Column 7 shows the payload size corresponding to DCI 0/1A/3/3A under the bandwidth corresponding to the first row under the FDD corresponding to the second row and the first column. The first row of the third row indicates that the LTE system is TDD, and the third row of columns 2 to 7 indicates that under the TDD corresponding to the third row and the first column, DCI 0 is below the bandwidth corresponding to the first row. /1A/3/3A corresponds to the payload size.

Table 4

The DCI format of the DCI format of 1 in different bandwidth values and different LTE systems as indicated in Table 4 above is 1. Columns 2 to 7 of the first row indicate different bandwidth values; the first row of the second row indicates that the LTE system is FDD, and the second row of columns 2 to 7 indicates that the second row is the first column. Under the FDD, the DCI1 payload size is below the bandwidth corresponding to the first row above. The first row of the third row indicates that the LTE system is TDD, and the third row of columns 2 to 7 indicates that under the TDD corresponding to the third row and the first column, the DCI1 corresponds to the bandwidth corresponding to the first row. The payload size.

table 5

The DCI formats at different bandwidth values and different LTE formats as indicated in Table 5 above are the payload sizes of 1B and 1D. 1.4M, 3M, 5M, 10M, 15M, and 20M in the first row respectively represent different bandwidth values; 2TX and 4TX in the second row respectively represent 2 antennas and 4 antennas included in the base station. The first row of the second row indicates that the LTE system is FDD, and the third row of columns 2 to 13 indicates that under the FDD corresponding to the second row and the first row, corresponding to the bandwidth corresponding to the first row, The number of antennas in the second row is the DCI1B/1D payload size. First The first column of the three rows indicates that the LTE system is TDD, and the fourth row of columns 2 to 13 indicates that the DCI1B/1D payload is corresponding to the number of antennas of the second row in the TDD corresponding to the third row and the first column. size.

Table 6

The DCI format at different bandwidth values and different LTE systems as shown in Table 6 above is the payload size of 1C. Columns 2 to 7 of the first row indicate different bandwidth values; the first row of the second row indicates that the LTE system is FDD, and the second row of columns 2 to 7 indicates that the second row is the first column. Under FDD, the DCI1C payload size is below the bandwidth of the first row above. The first row of the third row indicates that the LTE system is TDD, and the third row of columns 2 to 7 indicates that under the TDD corresponding to the third row and the first row, the DCI1C corresponds to the bandwidth corresponding to the first row. The payload size.

Table 7

The DCI format of the different bandwidth values and different LTE systems represented in Table 7 as described above is a payload size of 2. 1.4M, 3M, 5M, 10M, 15M, and 20M in the first row respectively represent different bandwidth values; 2TX and 4TX in the second row respectively represent 2 antennas and 4 antennas included in the base station. The first row of the second row indicates that the LTE system is FDD, and the third row of columns 2 to 13 indicates that under the FDD corresponding to the second row and the first row, corresponding to the bandwidth corresponding to the first row, The number of antennas in the second row is the DCI2 payload size. Third line first The column indicates that the LTE system is TDD, and the fourth row to the second column 13 indicates the DCI2 payload size corresponding to the number of antennas in the second row in the TDD corresponding to the third row and the first column.

Table 8

The DCI format shown in Table 8 above for different bandwidth values and different LTE systems is 2 Α payload size. In the first row, 1.4M, 3M, 5M, 10M, 15M, and 20M respectively represent different bandwidth values; 2TX and 4TX in the second row respectively represent 2 antennas and 4 antennas included in the base station. The first row of the second row indicates that the LTE system is FDD, and the third row of columns 2 to 13 indicates that under the FDD corresponding to the second row and the first row, corresponding to the bandwidth corresponding to the first row, The DCI2A payload size under the number of antennas in the second row. The first row of the third row indicates that the LTE system is TDD, and the fourth row of columns 2 to 13 indicates the DCI2A payload size corresponding to the number of antennas of the second row in the TDD corresponding to the third row and the first column. .

Table 9

The payload size is as shown in Table 6 above, and the DCI format at different bandwidth values and different LTE systems is 2B payload size. Columns 2 to 7 of the first row indicate different bandwidth values; the first row of the second row indicates that the LTE system is FDD, and the second row of columns 2 to 7 indicates that the second row is the first column. Under the FDD, the DCI2B payload size is below the bandwidth corresponding to the first line above. The first row of the third row indicates that the LTE system is TDD, and the third row of columns 2 to 7 indicates that under the TDD corresponding to the third row and the first row, the DCI2B corresponds to the bandwidth corresponding to the first row. The payload size. Optionally, the foregoing embodiment 102 obtains, according to the at least one first resource information, the at least one second resource information that is used to represent the DCI, and specifically includes the following:

(a) performing rate de-matching processing on the at least one first resource information such that the resource information obtained by each blind check is suitable for Viterbi decoding input.

(b) performing a Viterbi decoding process on the at least one first resource information after the rate matching;

(c) performing a masking process on at least one first resource information after the Viterbi decoding process;

For example, blind detection is performed according to all current RNTI values to perform demasking processing on at least one first resource information. For details, refer to existing related technologies, and details are not described herein again.

(d) performing CRC on the at least one first resource information after the de-masking process to obtain at least one second resource information.

Specifically, the at least one second resource information herein is resource information obtained by performing Viterbi decoding, de-masking, and CRC verification on the at least one first resource information.

Optionally, according to the foregoing analysis, it may be determined that the length combination of the DCI is determined in 100. In actual application, the length combination of the DCI includes at least three lengths of the DCI, for example, when the transmission mode is uncertain, the length combination of the DCI may be determined. It includes 7 lengths. When determining the transmission mode, in the SSS, two DCI formats can be determined according to each transmission mode, thereby determining the two DCI lengths, plus a DCI format that can only exist in the CSS, so in practical applications, it is determined The length combination of the DCI includes at least three DCI lengths.

FIG. 2 is a flowchart of a blind detection method according to another embodiment of the present invention. The execution subject of the blind detection method of this embodiment is a blind detection device. As shown in FIG. 2, the blind detection method in this embodiment may specifically include the following:

200, determining whether the current base station and the UE are fixed transmission mode; if not fixed, executing 201, otherwise executing 202;

The UE can simulate multiple users for testing. 201, determining a DCI length combination includes seven DCI lengths; performing 203;

Since the transmission mode is not fixed, all the possible DCI lengths are selected here, and there are a total of seven types. For details, refer to the description of the related embodiments above, and details are not described herein again.

And determining, according to the current transmission mode between the base station and the UE, the LTE system, the number of antennas of the base station, and the bandwidth information of the network, acquiring the length of the DCI included in the DCI length combination corresponding to the current transmission mode;

203, in the entire CCE resource space, according to each DCI length in the DCI length combination and the length of the PDCCH search to obtain a plurality of first resource information;

In the case where the network standard of the base station is TDD, the antenna mode is 4 antennas, and the bandwidth is 20M, for example, when the CCE resource space is 88 CCE units, each CCE unit corresponds to 72 bit resources, and the DCI length combination includes at least three DCIs. The length, for example, in transmission mode 7, can select the corresponding DCI length in Table 3, Table 4 and Table 6, where the length of the DCI is 47, 58 or 31 bits. The length of the PDCCH can be 1, 2, 4, and 8 CCEs. When searching for 88 CCE resource spaces, the search may be performed according to the DCI length of 47, 58 or 31 bits, and in the search process, for each DCI length search, the length of the PDCCH needs to be considered as 1, 2. 4 or 8 CCE search conditions, the final search obtains multiple first resource information.

Or, when searching in the 88 CCE resource space, the length of the PDCCH may be 1, 2, 4, or 8 CCEs. In the search process, for each PDCCH length search, the DCI length must be considered. 47, 58 or 31 bit search conditions, the final search obtains a plurality of first resource information. The plurality of first resource information herein includes at least one resource information. In short, in the search process, the length of the DCI and the length of the PDCCH occupying the length of the CCE resource must be considered at the same time, and are indispensable.

204, performing de-rate matching processing on the plurality of first resource information, so that the resource information obtained by each blind check is suitable for the input of the Viterbi decoding;

205. Perform Viterbi decoding processing on multiple first resource information after solution rate matching; Line 206;

206. Perform demask processing on the first resource information after the Viterbi decoding process, and execute

207;

Decapsulating the first resource information after Viterbi decoding processing according to all current RNTI values,

207: Perform CRC on the plurality of second resource information after the de-masking process, and save the second resource information that the CRC is successful; and execute 208;

The second resource information of the C RC success includes at least one second resource information.

The detailed implementation process of the foregoing 204-207 can refer to the prior art, and details are not described herein again. 208. Perform false alarm detection on the second resource information of the CRC successfully, and save the second resource information that is passed by the false alarm detection; and execute 209;

For details, refer to the description of the related embodiments above, and details are not described herein again.

209. Combine the second resource information that is detected by the false alarm and has the same RNTI and the same length of the DCI as a result of the blind detection.

In this way, the user does not need to distinguish between users, and in the scenario where the number of users is more than 100, the number of blind detections can be effectively reduced, the delay of blind detection can be shortened, and the efficiency of blind detection can be improved.

In the blind detection method of this embodiment, by using the foregoing solution, the user can be distinguished in the blind detection process, and in the scenario where the number of users is more than 100, the number of blind detections can be effectively reduced, and the blind detection delay can be shortened and the delay can be improved. Blind detection efficiency.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

FIG. 3 is a schematic structural diagram of a blind detecting apparatus according to an embodiment of the present invention. As shown in FIG. 3, the blind detection apparatus of this embodiment may specifically include: determining module 10, searching module 11, and obtaining Module 12 and merge module 13 are taken.

The determining module 10 is configured to determine a length combination of the downlink control information, where the length combination of the downlink control information includes at least one length of the downlink control information. The search module 11 is connected to the determining module 10, and the search module 11 is configured to occupy at least one length of the downlink control information and the physical downlink control channel information in the length combination of the downlink control information determined by the determining module 10 in the control channel unit resource space. The resource length obtains at least one first resource information. The obtaining module 12 and the searching module 11 are configured to obtain, according to the at least one first resource information, the corresponding at least one second resource information used to represent the downlink control information. The merging module 13 is connected to the obtaining module 12, and the merging module 13 is configured to combine the second resource information of the at least one second resource information acquired by the obtaining module 12 with the same wireless network temporary identifier and the same length of the downlink control information as the blind detection. result.

The implementation of the method for implementing the blind detection by using the above-mentioned modules is the same as the implementation of the related method embodiments. For details, refer to the description of the related method embodiments, and details are not described herein.

The blind detection apparatus of this embodiment implements determining the length combination of the DCI by using the foregoing module, where the length combination of the DCI includes at least one length of the DCI; and in the CCE resource space, according to at least one length of the DCI and the PDCCH information. The resource length search acquires at least one first resource information; respectively acquires at least one second resource information used to characterize the DCI according to the at least one first resource information; performs CRC on the at least one second resource information; and passes the CRC, the RNTI The second resource information of the same and the same length of the DCI is combined as a result of the blind detection. Compared with the prior art, the technical solution of the embodiment does not need to distinguish users, and in the scenario of simulating a multi-user test tool, for example, the number of simulated users is greater than 100, the number of blind detections can be effectively reduced, and the blind detection delay can be shortened. Improve the efficiency of blind inspection.

Optionally, in the foregoing embodiment, the obtaining module 12 is specifically configured to perform at least one length of the following row control information and a resource length occupied by the physical downlink control channel information as a search condition, and search for, in the control channel unit resource space, obtain at least one a resource information, the physics The resource length occupied by the downlink control channel information is 1, 2, 4 or 8 control channel elements. FIG. 4 is a schematic structural diagram of a blind detecting apparatus according to another embodiment of the present invention. As shown in FIG. 4, the blind detecting apparatus of this embodiment is based on the embodiment shown in FIG. 3, and the acquiring module 12 in the blind detecting apparatus of the embodiment specifically includes: a de-rate matching unit 121 and a decoding processing unit. 122. Deblocking processing unit 123 and verification processing unit 124.

The de-rate matching unit 121 is connected to the search module 11, and the de-rate matching unit 121 is configured to perform de-rate matching processing on the at least one first resource information searched by the search module 11. The decoding processing unit 122 is coupled to the de-rate matching unit 121, and the decoding processing unit 122 is configured to perform Viterbi decoding processing on the at least one first resource information after the rate-matching of the de-rate matching unit 121. The deblocking processing unit 123 is connected to the decoding processing unit 122, and the demasking processing unit 123 is configured to perform demask processing on the at least one first resource information after the Viterbi decoding processing by the decoding processing unit 122; the verification processing unit 124 and The de-masking processing unit 123 is configured to perform a cyclic redundancy check on the at least one first resource information that is demasked by the de-masking processing unit 123 to obtain at least one second resource information.

At this time, the merging module 13 is connected to the check processing unit 124, and the merging module 13 is configured to: in the at least one second resource information obtained by the check processing unit 124, the wireless network temporary identifiers are the same and the downlink control information has the same length. The combination of the two resource information is the result of blind detection, which is not shown in the figure.

Optionally, the detection module 14 is further included in the blind detection device of this embodiment. The detection module 14 is connected to the acquisition module 12, and the detection module 14 is configured to perform false alarm detection on the at least one second resource information acquired by the acquisition module 12.

Further, the detecting module 14 in the blind detecting device of the embodiment specifically includes: an obtaining unit 141 and a detecting unit 142.

For example, as shown in FIG. 4, the obtaining unit 141 is connected to the check processing unit 124, and the obtaining unit 141 is configured to process each of the at least one second resource information obtained by the check processing unit 124, according to the wireless. The network temporary identifier and the subframe number obtain the corresponding search space. Between. The detecting unit 142 is connected to the obtaining unit 141 and the check processing unit 124, and the detecting unit 142 is configured to determine the first resource information corresponding to each second resource information of the at least one second resource information processed by the check processing unit 124. Whether the location in the resource space of the control channel unit is in the search space acquired by the obtaining unit 141; if not, it is determined that the false alarm detection fails; otherwise, when it is, it is determined that the false alarm detection passes. As shown in FIG. 4, in this embodiment, the merging module 13 is connected to the detecting unit 142, and the merging module 13 is configured to process the detecting unit 142 to obtain the same temporary identifier of the wireless network in the at least one second resource information that passes the false alarm detection. The second resource information of the same length of the control information is combined as a result of the blind detection.

Further, optionally, the detecting module 14 in the blind detecting device of the embodiment may further include a processing unit 143. The processing unit 143 is connected to the detecting unit 142. The processing unit 143 is configured to discard the second resource information that the false alarm detection fails when the detecting unit 142 determines that the false alarm detection fails.

Optionally, in this embodiment, the determining module 10 may determine the length combination of the downlink control information in the transmission mode between the indeterminate base station and the multi-user device. For details, refer to the description of the related method embodiment. The determining module 10 may be specifically configured to determine, according to at least one of a system of a long term evolution system, a number of antennas of a base station, and bandwidth information of a network where the base station is located, and a transmission mode between the base station and the user equipment, determining a length combination of the downlink control information, where The format of the long-term evolution system is time division duplex or frequency division duplex.

It should be noted that, in this embodiment, all the above optional technical solutions are put together in FIG. 4 to describe the present invention in detail. In an actual application, each of the above optional technical solutions may constitute an embodiment separately from the embodiment shown in FIG. 3. No longer here - introduction.

The blind detection apparatus of this embodiment adopts the technical solution of the foregoing embodiment, and does not distinguish between users, and in the scenario of simulating a multi-user test tool, for example, the number of simulated users is greater than 100, It can effectively reduce the number of blind inspections, shorten the blind detection delay, and improve the efficiency of blind inspection.

The device embodiments described above are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located in one place. , or it can be distributed to at least two network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A blind detection method, comprising:

The method according to claim 1, wherein, in the control channel unit resource space, acquiring at least one first resource information according to at least one length of the downlink control information and a resource length occupied by physical downlink control channel information The method includes: performing, by using at least one length of the downlink control information and a resource length occupied by the physical downlink control channel information, a search in the control channel unit resource space, and acquiring the at least one first resource information, where The resource length occupied by the physical downlink control channel information is 1, 2, 4 or 8 control channel units.

3. The method according to claim 1, further comprising:

Performing false alarm detection on the at least one second resource information.

The method of claim 3, wherein performing the false alarm detection on the at least one second resource information comprises:

For each of the second resource information, obtaining a corresponding search space according to the wireless network temporary identifier and the subframe number;

Determining whether the location of the first resource information corresponding to the second resource information in the resource space of the control channel unit is in the search space; if not, determining that the false alarm detection fails; Otherwise, when it is, it is determined that the false alarm detection passes.

The method according to claim 4, wherein when it is determined that the false alarm detection is not passed, the method further includes: discarding the second resource information that the false alarm detection fails.

The method according to claim 1, wherein determining the length combination of the downlink control information comprises:

Determining a length combination of the downlink control information according to at least one of a system of a long term evolution system, a number of antennas of a base station, and bandwidth information of a network where the base station is located, and a transmission mode between the base station and the user equipment, where the long-term evolution The system's standard is time division duplex or frequency division duplex.

The method according to any one of claims 1-6, wherein the acquiring, according to the at least one first resource information, the corresponding at least one second resource information, which is used to represent the downlink control information, specifically includes :

De-rate matching processing on the at least one first resource information;

Performing a Viterbi decoding process on the at least one first resource information after the rate matching; performing a demasking process on the at least one first resource information after the Viterbi decoding process; and performing the demasking process Performing a cyclic redundancy check on the at least one first resource information to obtain the at least one second resource information.

8. A blind detection device, comprising:

a search module, configured to acquire, according to at least one length of the downlink control information and a resource length occupied by the physical downlink control channel information, at least one first resource information in the control channel unit resource space;

An acquiring module, configured to acquire, according to the at least one first resource information, a corresponding at least one second resource information used to identify the downlink control information;

a merging module, configured to temporarily identify the wireless network in the at least one second resource information The second resource information having the same length of the downlink control information is combined as a result of blind detection.

The device according to claim 8, wherein the acquiring module is configured to use at least one length of the downlink control information and a resource length occupied by the physical downlink control channel information as a search condition. Performing a search in the control channel unit resource space, and acquiring the at least one first resource information, where the physical downlink control channel information occupies a resource length of 1, 2, 4 or 8 control channel units.

The device according to claim 8, further comprising: a detecting module, configured to perform a false alarm detection on the at least one second resource information acquired by the acquiring module.

The device according to claim 10, wherein the detecting module comprises:

And an acquiring unit, configured to acquire, for each of the second resource information, a corresponding search space according to the wireless network temporary identifier and the subframe number;

a detecting unit, configured to determine whether a location of the first resource information corresponding to the second resource information in the resource space of the control channel unit is in the search space; if not, determining that the false alarm detection fails; otherwise When in, it is determined that the false alarm detection passes.

The device according to claim 11, wherein the detecting module further includes: a processing unit, configured to: when determining that the false alarm detection fails, discarding the success of the cyclic redundancy check Two resource information.

The device according to claim 8, wherein the determining module is specifically configured to: according to at least one of a system of a long term evolution system, a number of antennas of a base station, and bandwidth information of a network where the base station is located, and the A transmission mode between the base station and the user equipment determines a length combination of the downlink control information, where the long-term evolution system is time division duplex or frequency division duplex.

The device according to any one of claims 8 to 13, wherein the acquiring module specifically includes: a rate matching unit, configured to perform rate de-matching processing on the at least one first resource information;

a decoding processing unit, configured to perform a Viterbi decoding process on the at least one first resource information after the de-rate matching;

a de-masking processing unit, configured to perform a demasking process on the at least one first resource information after the Viterbi decoding process;

And a verification processing unit, configured to perform a cyclic redundancy check on the at least one first resource information after the demasking process, to obtain the at least one second resource information.