CN109586842B

CN109586842B - PDCCH configuration method and device, decoding method and device, medium and equipment

Info

Publication number: CN109586842B
Application number: CN201710909989.1A
Authority: CN
Inventors: 樊婷婷; 张杨
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2022-10-11
Anticipated expiration: 2037-09-29
Also published as: CN109586842A

Abstract

The invention discloses a PDCCH configuration method and device, a decoding method and device, a medium and equipment. The method comprises the following steps: determining an early termination check bit, wherein the early termination check bit is selected from a wireless network temporary identifier; repeatedly encoding the early termination check bit based on the length of a frozen bit segment to obtain a check bit repeated code, wherein the frozen bit segment is determined according to the encoding rule of a downlink Polar code, and the frozen bit segment is positioned in front of the first information bit; and placing the check bit repetition code in the frozen bit segment. The technical scheme of the invention can improve the ET characteristic of the PDCCH.

Description

PDCCH configuration method and device, decoding method and device, medium and equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a PDCCH configuration method and apparatus, a decoding method and apparatus, a medium, and a device.

Background

The third Generation Partnership project (3 gpp) is currently introducing New Radio access technology (NR), including at least fifth Generation mobile communication technology (5G).

The NR system has confirmed to support an Early Termination (ET) feature, and in order to obtain ET gain, coding rules of distributed CRC and Polar codes are designed, and ET decision is performed by distributed CRC bits, so as to achieve the purpose of reducing blind decoding complexity and decoding time. The conventional PDCCH configuration method has poor ET characteristics.

Disclosure of Invention

The technical problem solved by the invention is to improve the ET gain of the PDCCH.

To solve the foregoing technical problem, an embodiment of the present invention provides a method for configuring a PDCCH, including: determining an early termination check bit, wherein the early termination check bit is selected from a wireless network temporary identifier; repeatedly encoding the early termination check bit based on the length of a frozen bit segment to obtain a check bit repeated code, wherein the frozen bit segment is determined according to the encoding rule of a downlink Polar code, and the frozen bit segment is positioned in front of the first information bit; and placing the check bit repetition code in the frozen bit section.

Optionally, the determining the early termination check bit includes: and determining the early termination check bit according to the length of the frozen bit segment.

Optionally, the length of the early termination parity bit is 1 bit or 2 bits.

Optionally, the early termination check bit is continuous in the radio network temporary identifier.

Optionally, the PDCCH configuring method further includes: and determining the part of the temporary wireless network identifier except the early termination check bit as a scrambling bit, and scrambling the interleaved CRC bit by using the scrambling bit.

Optionally, the scrambling the interleaved CRC bits with the scrambling bits includes: and utilizing the scrambling bit to perform exclusive-OR operation on the bits with the same length as the scrambling bit in the CRC.

The embodiment of the invention also provides a decoding method of the PDCCH, which comprises the following steps: decoding and repeatedly decoding the frozen bit segment to obtain a check bit ending in advance, wherein the frozen bit segment is determined according to the encoding rule of the downlink Polar code and is positioned in front of the first information bit; matching the early termination check bit with a preset wireless network temporary identifier set to obtain a matching result; and determining to terminate the decoding in advance or continue the decoding according to the matching result.

Optionally, if it is determined to continue decoding according to the matching result, the method further includes: and selecting a decoding path for decoding according to the matching result, wherein the matching result comprises one or more wireless network temporary identifications matched with the early termination check bit.

Optionally, selecting a decoding path for decoding according to the matching result includes: determining a descrambling bit according to the early termination check bit and the matched wireless network temporary identifier, wherein the descrambling bit is a bit except the early termination check bit in the matched wireless network temporary identifier; and descrambling and checking by using the descrambling bit to finish decoding.

An embodiment of the present invention further provides a PDCCH configuring apparatus, including: an early termination check bit determining unit adapted to determine an early termination check bit, the early termination check bit being selected from a radio network temporary identifier; the repeated coding unit is suitable for repeatedly coding the early termination check bit based on the length of a frozen bit segment to obtain a check bit repeated code, wherein the frozen bit segment is determined according to the coding rule of the downlink Polar code, and the frozen bit segment is positioned before the first information bit; a placing unit adapted to place the check bit repetition code in the frozen bit segment.

Optionally, the early termination parity bit determination unit is adapted to determine the early termination parity bit according to the length of the frozen bit segment.

Optionally, the length of the early termination parity bit is 1 bit or 2 bits.

Optionally, the apparatus for configuring PDCCH further includes: and the scrambling unit is suitable for determining the part except the early termination check bit in the wireless network temporary identifier as a scrambling bit and scrambling the interleaved CRC bit by using the scrambling bit.

Optionally, the scrambling unit is adapted to perform an exclusive or operation on bits of the CRC having the same length as the scrambling bit by using the scrambling bits.

An embodiment of the present invention further provides a PDCCH decoding apparatus, including: the early termination check bit acquisition unit is suitable for decoding and repeatedly decoding the frozen bit section to obtain the early termination check bit, wherein the frozen bit section is determined according to the encoding rule of the downlink Polar code, and the frozen bit section is positioned in front of the first information bit; the matching unit is suitable for matching the early termination check bit with a preset wireless network temporary identifier set to obtain a matching result; and the judging unit is suitable for determining to terminate decoding in advance or continue decoding according to the matching result.

Optionally, if it is determined to continue decoding according to the matching result, the apparatus further includes: and the decoding unit is suitable for selecting a decoding path to decode according to the matching result, and the matching result comprises one or more wireless network temporary identifications matched with the early termination check bits.

Optionally, the decoding unit includes: a descrambling bit determining unit, adapted to determine a descrambling bit according to the early termination check bit and the matched temporary wireless network identifier, where the descrambling bit is a bit other than the early termination check bit in the matched temporary wireless network identifier;

and the descrambling and checking unit is suitable for descrambling and checking by utilizing the descrambling bit so as to finish decoding.

The embodiment of the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the PDCCH configuration method are executed.

The embodiment of the invention also provides a computer-readable storage medium, wherein computer instructions are stored on the computer-readable storage medium, and the computer instructions are executed to perform the steps of the decoding method of the PDCCH.

The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the PDCCH configuration method when executing the computer instructions.

The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the decoding method for the PDCCH when executing the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, the early termination check bit is determined in the RNTI, the early termination check bit is repeatedly coded, and the check bit repeated code obtained by repeated coding is placed in the frozen bit section. Under the configuration method of the PDCCH, the receiving end can decode the check bit repetition code to obtain the early termination check bit, and further can utilize the early termination check bit to carry out ET judgment. Therefore, the receiving end can obtain extra ET gain outside the Polar code brought by the early termination check bit, and the complexity of the receiving end is lower.

Drawings

Fig. 1 is a flowchart of a PDCCH configuring method according to an embodiment of the present invention;

FIG. 2 is a resource diagram of a PDCCH in an embodiment of the present invention;

FIG. 3 is a flowchart of a PDCCH decoding method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an apparatus for configuring a PDCCH according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a PDCCH decoding apparatus according to an embodiment of the present invention.

Detailed Description

As described above, the ET characteristic of the existing PDCCH configuration method is to be improved.

In the configuration process of the PDCCH, a process of scrambling the CRC with a Radio Network Temporary Identity (RNTI) is generally included. The length of the RNTI is typically 16 bits.

The RNTI scrambling for PDCCH is typically based on CRC, and when CRC is used for ET decision, different RNTI scrambling schemes may affect the ET performance of CRC to different degrees.

In some designs, RNTI scrambling is processed separately from the ET of CRC, such that RNTI scrambling is performed independently from the ET to avoid RNTI scrambling affecting the ET performance of PDCCH.

For example, C-domain scrambling, i.e., code sub-bit scrambling, or U-domain scrambling, i.e., information bit scrambling, may be employed.

In particular, in some scrambling schemes, the RNTI is conveyed with shortened bits. In the scheme, during decoding, a receiving end needs to fill Log Likelihood Ratio (Log Likelihood Ratio, LLR) of shortening bits according to a candidate RNTI sequence, and needs to perform Polar decoding for multiple times, so that the decoding complexity of the receiving end is increased, and in the scheme, an extra ET cannot be obtained before the ET provided by a Polar code structure.

In other scrambling schemes, the extended 16-bit RNTI is transmitted in place on all the frozen bits. However, in this scheme, the receiving end needs to perform LLR recovery of 16-bit RNTI according to the extension scheme, which increases the steps of decoding processing at the receiving end, and in this type of scheme, it is also impossible to obtain an extra ET before the ET provided by Polar code construction.

In other schemes, 16-bit RNTI is directly xored with 16-bit CRC, which is similar to the LTE scheme and thus cannot provide ET characteristics that the NR system needs to support.

In the embodiment of the invention, the early termination check bit is determined in the RNTI, the early termination check bit is repeatedly coded, and the check bit repeated code obtained by repeated coding is placed in the frozen bit section. Under the configuration method of the PDCCH, the receiving end can decode the check bit repetition code to obtain the early termination check bit, and then ET judgment can be carried out by utilizing the early termination check bit. Therefore, the receiving end can obtain extra ET gain outside the Polar code brought by the early termination check bit, and the complexity of the receiving end is lower.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of a PDCCH configuration method in an embodiment of the present invention, which specifically includes the following steps:

step S11, determining an early termination check bit, wherein the early termination check bit is selected from a wireless network temporary identifier;

step S12, repeatedly coding the early termination check bit based on the length of a frozen bit segment to obtain a check bit repeated code, wherein the frozen bit segment is determined according to the coding rule of a downlink Polar code, and the frozen bit segment is positioned in front of a first information bit;

And S13, placing the check bit repetition code in the frozen bit.

By repeatedly encoding the early termination check bits in step S12, the receiver can obtain the early termination check bits with higher accuracy when decoding the frozen bit segment, and the receiver can obtain additional ET gain according to the early termination check bits.

Specifically, the receiving end may match the early termination check bit with a preset RNTI set after obtaining the early termination check bit, and the matching result may be that no matched RNTI is obtained in the preset RNTI set, or the matching result may include one or more matched RNTIs.

If the matched RNTI is not obtained, the receiving end can execute ET to obtain extra ET gain; if one or more matched RNTIs are obtained, the receiving end can continue decoding.

Since the receiver obtains the ET gain by terminating the parity bits in advance, the more the number of bits of the parity bits terminated in advance, the larger the ET gain that can be obtained. However, because the check bits terminated in advance need to be repeatedly encoded, and the check bit repetition code obtained by repeated encoding is placed in the frozen bit segment, the number of bits of the frozen bit segment is limited, and the short check bits terminated in advance contribute to improving the accuracy of the check bits terminated in advance obtained by decoding at the receiving end. Thus, the early termination check bits can be determined in combination with the length of the frozen bit segments as needed.

In a specific implementation, the length of the early termination parity bits may be 1 bit or 2 bits, or more. The early termination check bit may be continuous or discontinuous in the RNTI.

Specifically, the early termination check bit may be the first 2 bits of the 16-bit RNTI. Therefore, the accuracy of the front termination check bit obtained by decoding at the receiving end and the ET gain can be better considered.

The encoding rule of the downlink Polar code is determined by a protocol, and the position of each bit, for example, the position of an information bit, a frozen bit and a CRC bit, can be determined according to the encoding rule of the downlink Polar code.

The frozen bit segment in the embodiment of the present invention is the frozen bit outside the punctured bit, and is located before the first information bit. Referring to fig. 2, the bits shown in the legend 22 are the frozen bits, the bits shown in the legend 23 are the information bits, and the bits shown in the legend 24 are the CRC bits. The frozen bit segment is shown as a set of frozen bits 25 in the figure, preceding the first information bit 28.

When the position where the punctured bits are configured is determined according to the coding rule of the downlink Polar code, the frozen bit segment may be located between the last punctured bit and the first information bit. For example, the bits shown in fig. 2 as legend 21 are punctured bits, and the frozen bit segment may be located between the last punctured bit 29 and the first information bit 28.

With continued reference to fig. 1, in a specific implementation, the method for configuring PDCCH may further include step S14: and determining the part of the temporary wireless network identifier except the early termination check bit as a scrambling bit, and scrambling the interleaved CRC bit by using the scrambling bit.

Specifically, the scrambling of the interleaved CRC bits with the scrambling bits may be performed as follows: and utilizing the scrambling bit to perform exclusive-OR operation on the bits with the same length as the scrambling bit in the CRC.

Following the previous example, the front termination check bits may be the first 2 bits of the 16-bit RNTI, and the scrambling bits are the last 14 bits of the 16-bit RNTI. At this time, the last 14 bits in the CRC (see CRC set 27 in fig. 2) may be xor-ed with the scrambling bits for scrambling.

Similarly, when the termination check bit is x bits, the scrambling bits are the remaining (16-x) bits in the RNTI, and the scrambling can be performed by XOR operation between the scrambling bits of the (16-x) bits and the last (16-x) bits in the CRC.

The configuration method of the PDCCH has low complexity, and the ET gain beyond the ET performance of Polar codes can be obtained without configuring an additional decoding unit at the receiving end, so that the decoding time and complexity during PDCCH blind detection can be reduced.

Corresponding to the PDCCH configuring method in the embodiment of the present invention, an embodiment of the present invention further provides a PDCCH decoding method that can be used in combination with the PDCCH configuring method, and a flowchart thereof is shown in fig. 3, where the method includes the following steps:

step S31, decoding and repeatedly decoding the frozen bit segment to obtain a check bit ending in advance, wherein the frozen bit segment is determined according to the encoding rule of the downlink Polar code, and the frozen bit segment is positioned in front of the first information bit;

step S32, matching the early termination check bit with a preset wireless network temporary identifier set to obtain a matching result;

and S33, determining to terminate decoding in advance or continue decoding according to the matching result.

When the frozen bit segments are decoded in step S31, decoding may be performed sequentially from the 1 st bit, and for each bit in all the frozen bit segments carrying the early termination check bits, decoding decision is made on the frozen bit according to the LLR obtained by calculation until the first information bit is decoded, and decoding of the early termination check bits is completed.

After decoding of each bit in the frozen bit segment is finished, repeated decoding is carried out, and early termination check bits can be obtained. It can be understood by those skilled in the art that the early termination check bits sent by the original network side of the early termination check obtained through the above process may be the same or different, and the same probability is the aforementioned accuracy. Under the condition that the length of the frozen bit segment is the same, the less bits contained in the early termination check bit, the higher the accuracy of the early termination check bit obtained by decoding and decoding.

And the matching receiving end obtains a matching result through the early termination check bit obtained by decoding and a preset wireless network temporary identifier set.

As mentioned above, the matching result may be that no matching RNTI is obtained in the preset RNTI set, or the matching result may include one or more matching RNTIs.

If the matched RNTI is not obtained, the decoding is wrong, and the receiving end can execute ET to obtain extra ET gain; if one or more matched RNTIs are obtained, the receiving end can continue decoding.

When the subsequent decoding process is performed, a decoding path may be selected for decoding according to the matching result, where the matching result includes one or more wireless network temporary identifiers that match the early termination check bits.

That is, when the receiving end continues decoding, only one or more matched RNTIs are selected for subsequent decoding, so that the search space for the RNTIs after decoding is saved, the decoding time can be shortened, and the decoding efficiency can be improved.

Specifically, when a decoding path is selected for decoding according to the matching result, a descrambling bit, that is, a bit other than the early termination check bit in the RNTI which matches the early termination check bit, may be determined first. Then, descrambling is carried out by using the descrambling bit, and then the decoding path which passes the CRC verification is selected by the CRC bit to be output so as to finish decoding.

The PDCCH decoding method in the embodiment of the present invention may be used in combination with the PDCCH configuring method in the embodiment of the present invention, and the related noun explanations may refer to the PDCCH configuring method.

An embodiment of the present invention further provides a PDCCH configuration apparatus, and a schematic structural diagram of the PDCCH configuration apparatus refers to fig. 4, where the PDCCH configuration apparatus specifically includes the following units:

an early termination check bit determining unit 41 adapted to determine an early termination check bit, the early termination check bit being selected from a radio network temporary identifier;

a repetition coding unit 42, adapted to perform repetition coding on the early termination check bits based on the length of a frozen bit segment, to obtain a check bit repetition code, where the frozen bit segment is determined according to a coding rule of a downlink Polar code, and the frozen bit segment is located before a first information bit;

a placing unit 43 adapted to place said check bit repetition code in said frozen bit segment.

In a specific implementation, the early termination parity bit determination unit 41 is adapted to determine the early termination parity bit according to the length of the frozen bit segment.

In a specific implementation, the length of the early termination parity bit may be 1 bit or 2 bits.

In a specific implementation, the early termination check bit may be continuous in the radio network temporary identifier.

In a specific implementation, the apparatus for configuring PDCCH may further include: and the scrambling unit 44 is adapted to determine that the part of the radio network temporary identifier other than the early termination check bit is a scrambling bit, and scramble the interleaved CRC bit by using the scrambling bit.

In a specific implementation, the scrambling unit 44 is adapted to use the scrambling bits to xor bits of the CRC with the same length as the scrambling bits.

The terms, technical principles and beneficial effects related to the PDCCH configuration apparatus in the embodiment of the present invention may refer to the PDCCH configuration method in the embodiment of the present invention, and are not described herein again.

An embodiment of the present invention further provides a PDCCH decoding apparatus, and a schematic structural diagram of the PDCCH decoding apparatus refers to fig. 5, where the PDCCH decoding apparatus may include the following units:

an early termination check bit obtaining unit 51, adapted to decode and repeat decoding on a frozen bit segment to obtain an early termination check bit, where the frozen bit segment is determined according to an encoding rule of a downlink Polar code, and the frozen bit segment is located before a first information bit;

a matching unit 52, adapted to match the early termination check bit with a preset wireless network temporary identifier set, so as to obtain a matching result;

And the judging unit 53 is adapted to determine to terminate decoding in advance or continue decoding according to the matching result.

In a specific implementation, if it is determined to continue decoding according to the matching result, the apparatus may further include: and a decoding unit 54, adapted to select a decoding path for decoding according to the matching result, where the matching result includes one or more wireless network temporary identifiers matching with the early termination check bits.

In a specific implementation, the decoding unit 54 may include: a descrambling bit determining unit, adapted to determine a descrambling bit according to the early termination check bit and the matched temporary wireless network identifier, where the descrambling bit is a bit other than the early termination check bit in the matched temporary wireless network identifier; and the descrambling and checking unit is suitable for descrambling and checking by utilizing the descrambling bit so as to finish decoding.

The terms, technical principles and beneficial effects involved in the PDCCH decoding apparatus in the embodiment of the present invention may refer to the PDCCH decoding method in the embodiment of the present invention, and are not described herein again.

The embodiment of the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the configuration method of the PDCCH are executed.

The embodiment of the present invention further provides another computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed, the method for decoding the PDCCH according to any one of the foregoing embodiments is performed.

The computer readable storage medium may be an optical disc, a mechanical hard disk, a solid state hard disk, etc.

The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the steps of the decoding method for the PDCCH when running the computer instruction. The receiving end in the present invention may be a User Equipment (UE), and specifically may be various appropriate terminals such as a smart phone and a tablet computer

It will be understood by those skilled in the art that the communication concept involved in the present invention, which is a concept in the NR system, may be the same as or similar to that in the LTE system, or may be a design different from that in the LTE system.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for configuring a PDCCH, comprising:

determining an early termination check bit, wherein the early termination check bit is selected from a wireless network temporary identifier; the length of the early termination check bit is smaller than that of the wireless network temporary identifier;

repeatedly encoding the early termination check bit based on the length of a frozen bit segment to obtain a check bit repeated code, wherein the frozen bit segment is determined according to the encoding rule of a downlink Polar code, and the frozen bit segment is a set of frozen bits after the last puncture bit and before the first information bit;

placing the check bit repetition code in the frozen bit segment;

and determining the part of the temporary wireless network identifier except the early termination check bit as a scrambling bit, and scrambling the interleaved CRC bit by using the scrambling bit.

2. The method of claim 1, wherein the determining the early termination check bit comprises: and determining the early termination check bit according to the length of the frozen bit segment.

3. The method of claim 1, wherein the early termination check bits have a length of 1 bit or 2 bits.

4. The method of claim 1, wherein the early termination check bit is continuous in the radio network temporary identifier.

5. The method of claim 1, wherein the scrambling interleaved CRC bits with the scrambling bits comprises: and utilizing the scrambling bit to perform exclusive-OR operation on the bits with the same length as the scrambling bit in the CRC.

6. A method for decoding a PDCCH is provided, which comprises:

decoding and repeatedly decoding the frozen bit segment to obtain a check bit ending in advance, wherein the frozen bit segment is determined according to the encoding rule of the downlink Polar code, and the frozen bit segment is a set of frozen bits after the last puncture bit and before the first information bit; the length of the early termination check bit is smaller than that of the wireless network temporary identifier;

matching the early termination check bit with a preset wireless network temporary identifier set to obtain a matching result;

determining to terminate decoding in advance or continue decoding according to the matching result;

If the decoding is determined to continue according to the matching result, the method further comprises: selecting a decoding path to decode according to the matching result, wherein the matching result comprises one or more wireless network temporary identifications matched with the early termination check bit;

selecting a decoding path for decoding according to the matching result comprises:

determining a descrambling bit according to the early termination check bit and the matched wireless network temporary identifier, wherein the descrambling bit is a bit except the early termination check bit in the matched wireless network temporary identifier;

and descrambling and checking by using the descrambling bit to finish decoding.

7. An apparatus for configuring a PDCCH, comprising:

an early termination check bit determining unit adapted to determine an early termination check bit, the early termination check bit being selected from a radio network temporary identifier; the length of the early termination check bit is smaller than that of the wireless network temporary identifier;

the repeated coding unit is suitable for repeatedly coding the early termination check bit based on the length of a frozen bit segment to obtain a check bit repeated code, wherein the frozen bit segment is determined according to the coding rule of a downlink Polar code, and the frozen bit segment is a set of frozen bits after the last puncture bit and before the first information bit;

A placing unit adapted to place the check bit repetition code in the frozen bit segment;

and the scrambling unit is suitable for determining the part except the early termination check bit in the wireless network temporary identifier as a scrambling bit and scrambling the interleaved CRC bit by using the scrambling bit.

8. The apparatus according to claim 7, wherein the early termination check bit determining unit is adapted to determine the early termination check bit according to the length of the frozen bit segment.

9. The apparatus of claim 7, wherein the length of the early termination check bit is 1 bit or 2 bits.

10. The apparatus of claim 7, wherein the early termination check bit is continuous in the radio network temporary identifier.

11. The apparatus of claim 7, wherein the scrambling unit is adapted to XOR the bits of the CRC with the same length as the scrambling bit with the scrambling bit.

12. A PDCCH decoding apparatus, comprising:

the early termination check bit acquisition unit is suitable for decoding and repeatedly decoding the frozen bit section to obtain the early termination check bit, wherein the frozen bit section is determined according to the encoding rule of the downlink Polar code, and the frozen bit section is a set of frozen bits after the last puncture bit and before the first information bit; the length of the early termination check bit is smaller than that of the wireless network temporary identifier;

The matching unit is suitable for matching the early termination check bit with a preset wireless network temporary identifier set to obtain a matching result;

the judging unit is suitable for determining to terminate decoding in advance or continue decoding according to the matching result;

if the decoding is determined to continue according to the matching result, the device further comprises: the decoding unit is suitable for selecting a decoding path to decode according to the matching result, and the matching result comprises one or more wireless network temporary identifications matched with the early termination check bits;

the coding unit comprises:

a descrambling bit determining unit, adapted to determine a descrambling bit according to the early termination check bit and the matched temporary wireless network identifier, where the descrambling bit is a bit other than the early termination check bit in the matched temporary wireless network identifier;

and the descrambling and checking unit is suitable for descrambling and checking by utilizing the descrambling bit to finish decoding.

13. A computer readable storage medium having stored thereon computer instructions, wherein the computer instructions when executed perform the steps of the method for configuring PDCCH according to any of claims 1 to 5.

14. A computer readable storage medium having stored thereon computer instructions, wherein the computer instructions when executed perform the steps of the PDCCH decoding method according to claim 6.

15. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of configuring PDCCH according to any of claims 1 to 5.

16. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the PDCCH decoding method of claim 6.