DCI transmission method, network side device and terminal

Abstract

The present invention provides a DCI transmission method, a network-side device, and a terminal. The DCI transmission method includes: sending a physical downlink control channel (PDCCH) to a terminal; the first data carried in the PDCCH is data obtained by length encoding using second data, and the second data includes the original DCI, or includes the original DCI and corresponding check data; the number of bits of the first data is the same as the number of transmission bits corresponding to a single-stage DCI format or DCI size currently selected by a terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently selected by a terminal and the number of corresponding check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to at least one DCI format or DCI size currently selected by the terminal. The embodiments of the present application can improve the flexibility and transmission reliability of the terminal DCI size.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular to a DCI transmission method, network-side equipment, and a terminal. Background Art

[0002] In the prior art, within the coverage area of ​​a base station, the base station can send downlink control information (DCI) to the terminal through a physical downlink control channel (PDCCH) to schedule uplink and downlink resources of the terminal through DCI.

[0003] As the distance between the terminal and the base station increases, for example, for a terminal at the edge of the base station's coverage, the communication quality between the terminal and the base station is poor, which will reduce the reliability of DCI transmission.

[0004] In related technologies, in order to ensure effective transmission of DCI between the terminal and the base station, the original DCI is often split into two levels of DCI, and the two levels of DCI are transmitted on different time resources, so that each level of DCI can be transmitted using a lower code rate, thereby improving the base station coverage capability.

[0005] However, after the original DCI is split into two levels of DCI, the DCI size (DCI Size) or the DCI payload size (i.e., Payload size) will be changed, and the pre-configured blind detection capability in the terminal cannot effectively detect the payload size of the split DCI, thereby reducing the transmission reliability of the DCI. Summary of the Invention

[0006] The embodiments of the present invention provide a DCI transmission method, a network-side device, and a terminal to solve the problem of reduced DCI transmission reliability when DCI is split.

[0007] To solve the above-mentioned technical problems, the present invention is achieved as follows:

[0008] In a first aspect, an embodiment of the present invention provides a DCI transmission method for a network-side device, the DCI transmission method including:

[0009] Send PDCCH to the terminal;

[0010] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0011] The number of bits of the first data is the same as the number of transmission bits corresponding to a single-level DCI format or DCI size currently candidate for a terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently candidate for a terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one of the terminals.

[0012] In a second aspect, an embodiment of the present invention provides a DCI transmission method for a terminal, the DCI transmission method including:

[0013] Receive PDCCH;

[0014] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0015] Decoding the first data to obtain second data including the original DCI;

[0016] The number of bits of the first data is the same as the number of transmission bits corresponding to the single-level DCI format or DCI size currently candidate for the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one terminal.

[0017] In a third aspect, an embodiment of the present invention provides a network-side device, including: a processor and a transceiver;

[0018] The transceiver is used to send the PDCCH to the terminal;

[0019] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0020] The number of bits of the first data is the same as the number of transmission bits corresponding to a single-level DCI format or DCI size currently candidate for a terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently candidate for a terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one of the terminals.

[0021] In a fourth aspect, an embodiment of the present invention provides a terminal, including: a processor and a transceiver;

[0022] The transceiver is configured to receive a PDCCH;

[0023] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0024] The processor is configured to decode the first data to obtain second data including the original DCI;

[0025] The number of bits of the first data is the same as the number of transmission bits corresponding to the single-level DCI format or DCI size currently candidate for the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one terminal.

[0026] In a fifth aspect, an embodiment of the present invention provides a network-side device, including:

[0027] A sending module, used to send PDCCH to the terminal;

[0028] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0029] The number of bits of the first data is the same as the number of transmission bits corresponding to a single-level DCI format or DCI size currently candidate for a terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently candidate for a terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one of the terminals.

[0030] In a sixth aspect, an embodiment of the present invention provides a terminal, including:

[0031] A receiving module, configured to receive a PDCCH;

[0032] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0033] a decoding module, configured to decode the first data to obtain second data including the original DCI;

[0034] The number of bits of the first data is the same as the number of transmission bits corresponding to the single-level DCI format or DCI size currently candidate for the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one terminal.

[0035] In the seventh aspect, an embodiment of the present invention provides a network side device, including a processor, a memory, and a computer program stored in the memory and runnable on the processor, wherein when the computer program is executed by the processor, the steps in the DCI transmission method described in the first aspect are implemented.

[0036] In an eighth aspect, an embodiment of the present invention provides a terminal, characterized in that it includes a processor, a memory, and a computer program stored in the memory and runnable on the processor, and when the computer program is executed by the processor, it implements the steps in the DCI transmission method described in the second aspect.

[0037] In a ninth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the computer program implements the steps in the DCI transmission method as described in the first aspect, or when the computer program is executed by the processor, the computer program implements the steps in the DCI transmission method as described in the second aspect.

[0038] In an embodiment of the present invention, a network-side device sends a PDCCH to a terminal; the first data carried in the PDCCH is data obtained by length encoding using second data, and the second data includes original DCI, or includes original DCI and corresponding check data; the number of bits of the first data is the same as the number of transmission bits corresponding to a single-stage DCI format or DCI size currently selected by the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently selected by the terminal and the number of corresponding check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to at least one DCI format or DCI size currently selected by the terminal. In this way, the terminal can obtain the first data using the same number of transmission bits as at least one currently selected DCI format or DCI size, and obtain the second data according to the decoding method of the first data, thereby realizing the transmission of DCI, which can improve the flexibility and transmission reliability of DCI transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0040] Figure 1 This is one of the flow charts of a DCI transmission method provided by an embodiment of the present invention;

[0041] Figure 2 This is one of the flow charts of the network side device encoding DCI provided by an embodiment of the present invention;

[0042] Figure 3 This is the second flowchart of the network side device encoding DCI provided by an embodiment of the present invention;

[0043] Figure 4 This is a second flowchart of a DCI transmission method provided by an embodiment of the present invention;

[0044] Figure 5 This is a flowchart of a terminal decoding DCI provided by an embodiment of the present invention;

[0045] Figure 6 This is a structural diagram of a network-side device provided by an embodiment of the present invention;

[0046] Figure 7 is a structural diagram of a terminal provided by an embodiment of the present invention;

[0047] Figure 8 This is another diagram of a network-side device structure provided by an embodiment of the present invention;

[0048] Figure 9 This is another terminal structure diagram provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] See also Figure 1 , Figure 1 This is a flow chart of a DCI transmission method provided by an embodiment of the present invention, which is used for network side equipment, such as Figure 1 As shown, the DCI transmission method may include the following steps:

[0051] Step 101. Send PDCCH to the terminal; the first data carried in the PDCCH is data obtained by length encoding using second data, and the second data includes the original DCI, or includes the original DCI and corresponding verification data; the number of bits of the first data is the same as the number of transmission bits corresponding to a single-level DCI format or DCI size currently selected by a terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently selected by a terminal and the corresponding number of verification information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to at least one DCI format or DCI size currently selected by the terminal.

[0052] In a specific implementation, the above-mentioned original DCI may include: the first-level DCI in the two-level DCI, or may include the first-level DCI and the second-level DCI in the two-level DCI, and may even include DCI that may appear in the future and has a different number of transmission bits from the single-level DCI supported by the terminal; the above-mentioned verification data can be used to verify whether the number of bits or the bit sequence of the original DCI is correct, for example: the verification data can be data used for cyclic redundancy check (CRC).

[0053] In addition, the above-mentioned terminal's current candidate single-level DCI format or DCI size may also be referred to as the currently available single-level DCI format or DCI size. For example, if the terminal originally supports five DCI formats A to E, but the network-side device currently configures only three DCI formats A to C for this transmission, then the terminal's current candidate / available single-level DCI formats are the three DCI formats A to C, or the terminal's currently available DCI sizes are the three DCI sizes corresponding to the three DCI formats A to C, respectively. The terminal may use any candidate single-level DCI format or DCI size selected from this set (including the three DCI formats A to C, or the three DCI sizes corresponding to the three DCI formats A to C, respectively).

[0054] In one embodiment of the present application, the single-stage DCI format or DCI size supported by the terminal is different from the format or size of the second data.

[0055] For example: In an embodiment of the present invention, the number of transmission bits of the second data is changed through length coding, that is, the payload size of the second data is changed, so that the number of transmission bits of the first data obtained after length coding is the same as the number of transmission bits corresponding to one of the single-stage DCI formats or DCI sizes currently selected by the terminal, so that the current blind detection capability of the terminal can effectively detect the payload size of the first data, thereby improving the transmission reliability of the DCI.

[0056] In the application, before sending the DCI, the network side device performs length encoding on the DCI so that the first data after length encoding matches a single-stage DCI format or DCI size currently available to the terminal. In this way, there is no need to improve the blind detection capability of the terminal to achieve reception of various DCI formats or DCI sizes, which can reduce the complexity of the terminal.

[0057] In another embodiment of the present application, the network side is able to transform the number of transmission bits of the DCI from the number of transmission bits corresponding to a DCI format or DCI size currently candidate for the terminal to the number of transmission bits corresponding to another DCI format or DCI size currently candidate for the terminal, that is, at least one single-stage DCI format or DCI size supported by the terminal is the same as the format or size of the second data.

[0058] For example, when the number of transmission bits of the original DCI is 40 and the DCI sizes of the terminal candidates are 35, 40, 44 and 48, the network-side device may encode the second data into 48-bit first data.

[0059] In the embodiment of the present invention, the format / size of DCI can be flexibly converted to improve the flexibility of DCI transmission.

[0060] Specifically, the encoding method of the length encoding may be repetition encoding or redundant encoding.

[0061] The repetition coding may repeat some or all of the bit values ​​in the second data so that the number of bits of the second data is the same as the number of transmission bits of a single-level DCI format or DCI size supported by the terminal.

[0062] In addition, the encoding method of the above-mentioned redundant coding can be a polar code (Polar code), a low-density parity check code (Low Density Parity Check code, LDPC code) or a concatenated code (turbo code), etc., which can also make the number of bits of the second data the same as the number of transmission bits of a single-stage DCI format or DCI size supported by the terminal.

[0063] The encoding method of the polar code, LDPC code or turbo code is the same as that in the prior art and will not be described in detail here.

[0064] In this embodiment, the number of bits of the second data can be changed through length coding so that the number of bits of the first data is the same as the number of transmission bits corresponding to a single-level DCI format or DCI size currently selected by a terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently selected by a terminal and the corresponding number of check information bits.

[0065] For example: Figure 2 As shown, the length encoding of the second data including the original DCI and the corresponding check data may specifically include the following process:

[0066] Step 201: Obtain original DCI.

[0067] In this step, check data corresponding to the original DCI may also be generated. The check data may be a check bit or a bit sequence, for example, data used for CRC.

[0068] Step 202: Generate second data according to the original DCI and the check data.

[0069] Step 203: Perform length encoding on the second data to obtain first data having the same number of bits as the target DCI format or DCI size.

[0070] The target DCI format or DCI size may be any one of the single-stage DCI formats or DCI sizes supported by the terminal, or a reference DCI format or DCI size.

[0071] Step 204: Encode the first data again.

[0072] In this step, the first data is encoded again, which can be understood as carrying the first data through the PDCCH to achieve transmission.

[0073] In actual applications, the terminal can support multiple single-stage DCI formats or DCI sizes, and perform blind detection on the information received on the PDCCH according to multiple single-machine DCI formats or DCI sizes to determine which format or size of the received DCI is, thereby facilitating blind detection, decoding and response according to the format or size of the DCI.

[0074] For example, if the number of first-level DCI bits is E, and the terminal supports single-level DCI formats or DCI sizes with transmission bit numbers of A, B, C, and D, then blind detection and decoding of other bits of DCI cannot be achieved during the blind detection process.

[0075] In this embodiment, the second data including the original DCI, or the original DCI and the corresponding check data is encoded into the first data through length coding, so that the number of bits of the first data is the same as the number of transmission bits corresponding to one of the single-stage DCI formats or DCI sizes. Therefore, during the process of the terminal receiving DCI and decoding DCI, the number of transmission bits of its pre-configured single-stage DCI format or DCI size can meet the blind detection requirements of the first data, thereby eliminating the need to improve the blind detection capability of the terminal or reduce the blind detection assumptions of each single-stage DCI format or DCI size detection, thereby improving the adaptability of DCI and the blind detection capability of the terminal.

[0076] In a specific embodiment of the present invention, after the PDCCH is sent to the terminal, the terminal needs to recover the second data therefrom, and the recovery of the second data needs to be based on a decoding method corresponding to the encoding method of the second data.

[0077] As an optional implementation manner, the DCI transmission method further includes:

[0078] Sending first indication information, where the first indication information is used to indicate whether to perform length encoding on the second data, or to indicate an encoding method used to perform length encoding on the second data.

[0079] In a specific implementation, when the number of bits of the second data is the same as the number of transmission bits of a single-stage DCI format or DCI size supported by the terminal, the second data may not be length-encoded and may be directly carried in the PDCCH to be sent to the terminal. Upon receiving the PDCCH, the terminal does not know whether the second data therein is length-encoded or non-length-encoded.

[0080] For example: Figure 3 As shown, when the second data is not length-encoded, the DCI encoding process may specifically include the following processes:

[0081] Step 301: Obtain original DCI.

[0082] In this step, check data corresponding to the original DCI may also be generated. The check data may be a check bit or a bit sequence, for example, data used for CRC.

[0083] Step 302: Generate second data according to the original DCI and the check data.

[0084] Step 303: Encode the second data.

[0085] In this step, encoding the second data may be understood as carrying the second data through the PDCCH to achieve transmission.

[0086] In one embodiment, the first indication information is used to indicate whether length encoding is performed on the second data. If the second data has been length encoded, the encoding method used for length encoding the second data is predefined by the protocol.

[0087] In this way, the terminal can determine the decoding method of the second data according to the predefined protocol, without the need for the network side device to send the encoding method or decoding method of the second data, which can save resources.

[0088] In another embodiment, the first indication information is used to indicate an encoding method used for length encoding of the second data.

[0089] In this embodiment, the network side device actively informs the terminal of the encoding method used for the second data, so that the terminal decodes the first data according to the decoding method corresponding to the encoding method to obtain the second data. In this way, different encoding methods can be used for DCI of different formats, which can improve the flexibility of the DCI encoding method.

[0090] In a specific embodiment of the present invention, the terminal supports multiple DCI formats or DCI sizes, and it is not certain which DCI format or DCI size of first data the second data is encoded into through length coding. For example: the number of bits of the second data is 25, and the number of transmission bits of the DCI formats or DCI sizes supported by the terminal are 35, 40, 44 and 48 respectively, then it is impossible to determine whether the second data is encoded as 44-bit or 48-bit first data.

[0091] In one embodiment, the DCI transmission method further includes:

[0092] Second indication information is received, where the second indication information is used to indicate a format or size of the DCI of the first data.

[0093] In a specific implementation, the second indication information may be sent by upper layer signaling, such as Radio Resource Control (RRC) signaling.

[0094] In this embodiment, the second indication information is used to inform the network side device of the format or size of the DCI indicating the first data, which can avoid confusion of the format or size of the DCI of the first data during the length encoding process and improve the flexibility of the DCI encoding method.

[0095] In another embodiment, the format or size of the DCI of the first data is predefined by a protocol.

[0096] In this embodiment, the format or size of the DCI of the first data can be pre-configured in a protocol predefined manner, for example: the number of bits of the first data is made the same as the one with the largest number of transmission bits among multiple DCI formats or DCI sizes supported by the terminal, or the same as the one with the smallest number of transmission bits. This can avoid confusion of the format or size of the DCI of the first data during the length encoding process, avoid the transmission of the second indication information, and save resources.

[0097] The DCI transmission method in the present application enables the terminal to blindly detect the first data using the same number of transmission bits as the single-stage DCI format or DCI size, and obtain the second data according to the decoding method of the first data to realize the transmission of DCI, thereby eliminating the need to improve the blind detection capability of the terminal and reducing the complexity of the terminal.

[0098] See also Figure 4 , is a second flow chart of a DCI transmission method provided by an embodiment of the present invention, the DCI transmission method is applied to a terminal, such as Figure 4 As shown, the DCI transmission method may include the following steps:

[0099] Step 401: Receive PDCCH; the first data carried in the PDCCH is data obtained by length encoding using second data, and the second data includes original DCI, or includes original DCI and corresponding check data.

[0100] Step 402: Decode the first data to obtain second data including the original DCI; the number of bits of the first data is the same as the number of transmission bits corresponding to the single-level DCI format or DCI size currently selected by the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the DCI size currently selected by the terminal and the number of corresponding check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently selected by at least one terminal.

[0101] The decoding of the first data may be performed by decoding the first data in a decoding manner corresponding to the length encoding of the second data. Figure 1 The second data in the illustrated method embodiment has the same meaning and will not be described again here.

[0102] In a specific implementation, the DCI received by the terminal may be first data that has been length-coded, or second data that has not been length-coded.

[0103] In the DCI transmission method of the present application, the terminal can use blind detection with the same number of transmission bits as the single-level DCI format or DCI size it supports to obtain the first data, and obtain the second data according to the decoding method of the first data, thereby realizing the transmission of DCI, which can improve the transmission reliability of DCI.

[0104] As an optional implementation, when receiving DCI, the terminal may determine whether the received DCI is length-coded first data by receiving first indication information.

[0105] The first indication information may be received together with the DCI.

[0106] In one case, the DCI transmission method further includes:

[0107] First indication information is received, where the first indication information is used to indicate whether length encoding is performed on the second data.

[0108] In this embodiment, when the terminal receives the first indication information, it can determine whether the second data has been length-encoded based on the indication information. When it is determined that the second data has been length-encoded, it can decode it according to the encoding method used for length encoding of the second data. Specifically, the encoding method used for length encoding of the second data can be predefined by the protocol or determined by other methods.

[0109] In another case, the DCI transmission method further includes:

[0110] First indication information is received, where the first indication information is used to indicate an encoding method used for length encoding the second data.

[0111] In this embodiment, the first indication information indicates the encoding method used for length encoding of the second data, so that when the terminal receives the first indication information, it can determine the encoding method used for length encoding of the second data based on the indication information, and decode the second data according to the corresponding decoding method.

[0112] In a specific implementation, the encoding method may include repeated encoding or redundant encoding.

[0113] The above repeated coding and redundant coding have the same meaning as Figure 1 The definitions of repeated coding and redundant coding in the illustrated method embodiment are the same and will not be repeated here.

[0114] In another optional implementation, decoding the first data to obtain second data including the original DCI specifically includes:

[0115] verifying the first data;

[0116] If the verification is correct, obtaining DCI from the first data;

[0117] In the event of a check error, length decoding is performed on the first data to obtain the second data including the DCI.

[0118] In a specific implementation, the above-mentioned verification of the first data can be based on a check code. If the verification is correct, it can be determined that the first data includes the original DCI that has not been length-encoded, so that length decoding is not performed and DCI can be obtained from the first data.

[0119] In addition, in the case of a check error, it may be because the first data is length-coded, so the first data is length-decoded to obtain the second data, and the DCI is obtained from the second data.

[0120] In practical applications, in the event of a verification error, after length decoding the first data to obtain the second data, the second data can also be verified, and DCI can be obtained from the second data if the verification is correct; if the verification fails, another coding hypothesis can be used to decode the first data, and the above verification process can be repeated.

[0121] For example: Figure 5 As shown, the process of the terminal decoding the DCI may specifically include the following steps:

[0122] Step 501: Detect the received PDCCH according to the target number of bits.

[0123] The PDCCH carries the first data, and the target number of bits may be any one of the transmission bit numbers corresponding to multiple single-stage DCI formats or DCI sizes supported by the terminal.

[0124] Step 502: perform verification.

[0125] The above verification can be understood as: verification by verifying the check bit or bit sequence.

[0126] If the verification is correct, step 503 is executed; if the verification is incorrect, step 504 is executed.

[0127] Step 503: Determine whether the first data carries the original DCI.

[0128] In this step, when it is determined that the first data carries the original DCI, the original DCI can be obtained from the first data without performing length decoding on the first data.

[0129] Step 504: Decode the length of the first data and perform verification.

[0130] In this step, the first data after length decoding is verified. If the verification is correct, step 505 is executed; if the verification is incorrect, steps 501 to 504 are repeated to verify at other lengths until the verification succeeds or fails.

[0131] It should be noted that after the error is verified in step 504, the transmission bit number corresponding to another single-stage DCI format or DCI size can be selected from the transmission bit numbers corresponding to multiple single-stage DCI formats or DCI sizes supported by the terminal as the target bit number for detecting PDCCH.

[0132] Step 505: Obtain original DCI from the length-decoded first data.

[0133] In this implementation, it is possible to obtain the original DCI from the length-coded first data, and it is possible to obtain the original DCI from the first data that is not length-coded, which can improve the reliability of the terminal in obtaining DCI.

[0134] See also Figure 6 , Figure 6 is a schematic diagram of the structure of a network side device provided by an embodiment of the present invention, such as Figure 6 As shown, the network side device 600 includes:

[0135] The first sending module 601 is used to send PDCCH to the terminal; the first data carried in the PDCCH is data obtained by length encoding using the second data, and the second data includes the original downlink control information DCI, or includes the original DCI and corresponding verification data; the number of bits of the first data is the same as the number of transmission bits corresponding to a single-level DCI format or DCI size currently selected by the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the DCI size currently selected by the terminal and the corresponding number of verification information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to at least one of the DCI formats or DCI sizes currently selected by the terminal.

[0136] Furthermore, the network side device 600 further includes:

[0137] The second sending module is used to send first indication information, where the first indication information is used to indicate whether to perform length encoding on the second data, or to indicate an encoding method used to perform length encoding on the second data.

[0138] Furthermore, the encoding method used for length encoding the second data is predefined by the protocol.

[0139] Furthermore, the encoding method of the length encoding is repetition encoding or redundant encoding.

[0140] Furthermore, the network side device 600 further includes:

[0141] The receiving module is used to receive second indication information, where the second indication information is used to indicate the format or size of the DCI of the first data.

[0142] Furthermore, the format or size of the DCI of the first data is predefined by a protocol.

[0143] The network side device 600 of an embodiment of the present invention can perform length encoding on the second data to obtain first data with the same number of transmission bits as the single-level DCI format or DCI size supported by the terminal, and then realize the transmission of DCI based on the first data, which can improve the transmission reliability of DCI.

[0144] See also Figure 7 , Figure 7 is a schematic diagram of the structure of a terminal provided by an embodiment of the present invention, such as Figure 7 As shown, terminal 700 includes:

[0145] The first receiving module 701 is configured to receive a PDCCH; the first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original downlink control information DCI, or includes the original DCI and corresponding check data;

[0146] A decoding module 702 is used to decode the first data to obtain second data including the original DCI; the number of bits of the first data is the same as the number of transmission bits corresponding to the single-level DCI format or DCI size currently selected by the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the DCI size currently selected by the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently selected by at least one terminal.

[0147] Furthermore, the terminal 700 further includes:

[0148] The second receiving module is used to receive first indication information, where the first indication information is used to indicate whether length encoding is performed on the second data, or to indicate an encoding method used for length encoding of the second data.

[0149] Furthermore, the encoding method used for length encoding the second data is predefined by the protocol.

[0150] Furthermore, the encoding method is repeated encoding or redundant encoding.

[0151] Furthermore, the decoding module 702 specifically includes:

[0152] a verification unit, configured to verify the first data;

[0153] an acquiring unit, configured to acquire DCI from the first data if the verification is correct;

[0154] A decoding unit is used to, in the event of a check error, perform length decoding on the first data to obtain the second data including the DCI.

[0155] The terminal 700 of an embodiment of the present invention can obtain the first data using the same number of transmission bits as the single-level DCI format or DCI size it supports, and obtain the second data according to the decoding method of the first data, thereby realizing the transmission of DCI and improving the transmission reliability of DCI.

[0156] See also Figure 8 The embodiment of the present invention further provides a network side device, which includes a bus 801, a transceiver 802, an antenna 803, a bus interface 804, a processor 805 and a memory 806.

[0157] The transceiver 802 is configured to send a physical downlink control channel (PDCCH) to the terminal.

[0158] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0159] The number of bits of the first data is the same as the number of transmission bits corresponding to a single-level DCI format or DCI size currently candidate for a terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of a DCI size currently candidate for a terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one of the terminals.

[0160] Furthermore, the transceiver 802 is further configured to send first indication information, where the first indication information is used to indicate whether length encoding is performed on the second data, or to indicate an encoding method used for length encoding the second data.

[0161] Furthermore, the encoding method used for length encoding the second data is predefined by the protocol.

[0162] Furthermore, the encoding method of the length encoding is repetition encoding or redundant encoding.

[0163] Furthermore, the transceiver 802 is further configured to receive second indication information, where the second indication information is configured to indicate a format or size of the DCI of the first data.

[0164] Furthermore, the format or size of the DCI of the first data is predefined by a protocol.

[0165] Network side equipment can achieve Figure 1 To avoid repetition, the various processes implemented by the network-side device in the method embodiment shown are not described here.

[0166] An embodiment of the present invention further provides a terminal, which includes a bus 801 , a transceiver 802 , an antenna 803 , a bus interface 804 , a processor 805 , and a memory 806 .

[0167] The transceiver 802 is configured to receive a physical downlink control channel (PDCCH).

[0168] The first data carried in the PDCCH is data obtained by length encoding using second data, where the second data includes original DCI, or includes original DCI and corresponding check data;

[0169] The processor 805 is configured to decode the first data to obtain second data including the original DCI;

[0170] The number of bits of the first data is the same as the number of transmission bits corresponding to the single-level DCI format or DCI size currently candidate for the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one terminal.

[0171] Furthermore, the transceiver 802 is further configured to receive first indication information, where the first indication information is used to indicate whether length encoding is performed on the second data, or to indicate an encoding method used for length encoding the second data.

[0172] Furthermore, the encoding method used for length encoding the second data is predefined by the protocol.

[0173] Furthermore, the encoding method is repeated encoding or redundant encoding.

[0174] Further, the decoding of the first data performed by the processor 805 to obtain the second data including the original DCI specifically includes:

[0175] verifying the first data;

[0176] If the verification is correct, obtaining DCI from the first data;

[0177] In the event of a check error, length decoding is performed on the first data to obtain the second data including the DCI.

[0178] The terminal can achieve Figure 4 To avoid repetition, the various processes implemented by the terminal in the method embodiment shown are not described here.

[0179] exist Figure 8 In the embodiment, the bus architecture (represented by bus 801) is shown. Bus 801 may include any number of interconnected buses and bridges. Bus 801 links together various circuits including one or more processors represented by processor 805 and memory represented by memory 806. Bus 801 may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not described further herein. Bus interface 804 provides an interface between bus 801 and transceiver 802. Transceiver 802 may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. Data processed by processor 805 is transmitted on a wireless medium via antenna 803. Furthermore, antenna 803 also receives data and transmits the data to processor 805.

[0180] The processor 805 is responsible for managing the bus 801 and general processing, and may also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 806 may be used to store data used by the processor 805 when performing operations.

[0181] Optionally, the processor 805 may be a CPU, an ASIC, an FPGA, or a CPLD.

[0182] Preferably, the embodiment of the present invention further provides a network side device, including a processor 805, a memory 806, and a computer program stored in the memory 806 and executable on the processor 805, wherein the computer program is executed by the processor 805 to implement the above Figure 1 The various processes of the DCI transmission method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0183] Figure 9The terminal 900 is a schematic diagram of a structure of a terminal for implementing various embodiments of the present invention. The terminal 900 includes but is not limited to: a transceiver unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, a processor 910, and a power supply 911. It will be understood by those skilled in the art that Figure 9 The terminal structure shown in the figure does not constitute a limitation of the terminal. The terminal may include more or fewer components than shown, or combine certain components, or arrange the components differently. In the embodiments of the present invention, the terminal includes but is not limited to a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle terminal, a wearable device, and a pedometer.

[0184] The transceiver unit 901 is used to receive a physical downlink control channel PDCCH; the first data carried in the PDCCH is data obtained by length encoding using second data, and the second data includes the original DCI, or includes the original DCI and corresponding check data.

[0185] Processor 910 is used to decode the first data to obtain second data including the original DCI; the number of bits of the first data is the same as the number of transmission bits corresponding to the single-level DCI format or DCI size currently selected by the terminal, or the number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently selected by at least one terminal.

[0186] Furthermore, the transceiver 901 is also used to receive first indication information, where the first indication information is used to indicate whether to perform length encoding on the second data, or to indicate an encoding method used to perform length encoding on the second data.

[0187] Furthermore, the encoding method used for length encoding the second data is predefined by the protocol.

[0188] Furthermore, the encoding method is repeated encoding or redundant encoding.

[0189] Further, the decoding of the first data performed by the processor 910 to obtain the second data including the original DCI specifically includes:

[0190] verifying the first data;

[0191] If the verification is correct, obtaining DCI from the first data;

[0192] In the event of a check error, length decoding is performed on the first data to obtain the second data including the DCI.

[0193] Terminal 900 can achieve Figure 4 To avoid repetition, the various processes implemented by the terminal in the method embodiment shown are not described here.

[0194] It should be understood that in this embodiment of the present invention, the transceiver unit 901 can be used to receive and transmit signals during information transmission or calls. Specifically, it receives downlink data from the base station and transmits it to the processor 910 for processing; in addition, it transmits uplink data to the base station. Typically, the transceiver unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like. Furthermore, the transceiver unit 901 can communicate with the network and other devices via a wireless communication system.

[0195] The terminal provides users with wireless broadband Internet access through the network module 902, such as helping users to send and receive emails, browse web pages, and access streaming media.

[0196] The audio output unit 903 can convert audio data received by the transceiver unit 901 or the network module 902 or stored in the memory 909 into an audio signal and output it as sound. In addition, the audio output unit 903 can also provide audio output related to specific functions performed by the terminal 900 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 903 includes a speaker, a buzzer, a receiver, etc.

[0197] The input unit 904 is used to receive audio or video signals. The input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042. The graphics processor 9041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 906. The image frame processed by the graphics processor 9041 can be stored in the memory 909 (or other storage medium) or sent via the transceiver unit 901 or the network module 902. The microphone 9042 can receive sound and can process such sound into audio data. The processed audio data can be converted into a format output that can be sent to a mobile communication base station via the transceiver unit 901 in the case of a telephone call mode.

[0198] The terminal 900 also includes at least one sensor 905, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 9061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 9061 and / or the backlight when the terminal 900 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; the sensor 905 can also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be repeated here.

[0199] The display unit 906 is used to display information input by the user or information provided to the user. The display unit 906 may include a display panel 9061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0200] The user input unit 907 can be used to receive input digital or character information, and to generate key signal input related to the user settings and function control of the terminal. Specifically, the user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071, also known as a touch screen, can collect user touch operations on or near it (such as operations performed by the user using any suitable object or accessory such as a finger, stylus, etc. on or near the touch panel 9071). The touch panel 9071 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch direction, detects the signal caused by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into contact point coordinates, which are then sent to the processor 910, which receives the command sent by the processor 910 and executes it. In addition, the touch panel 9071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 9071, the user input unit 907 may also include other input devices 9072. Specifically, other input devices 9072 may include but are not limited to a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0201] Furthermore, the touch panel 9071 may be overlaid on the display panel 9061. When the touch panel 9071 detects a touch operation on or near it, it transmits the information to the processor 910 to determine the type of touch event. Subsequently, the processor 910 provides corresponding visual output on the display panel 9061 according to the type of touch event. Figure 9 In the embodiment, the touch panel 9071 and the display panel 9061 are two independent components to realize the input and output functions of the terminal. However, in some embodiments, the touch panel 9071 and the display panel 9061 can be integrated to realize the input and output functions of the terminal, which is not limited here.

[0202] The interface unit 908 is an interface for connecting external devices to the terminal 900. For example, the external devices may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 908 may be used to receive input (e.g., data information, power, etc.) from the external device and transmit the received input to one or more components within the terminal 900, or may be used to transmit data between the terminal 900 and the external device.

[0203] Memory 909 can be used to store software programs and various data. Memory 909 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of the mobile phone (such as audio data, a phone book, etc.). Furthermore, memory 909 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0204] Processor 910 is the terminal's control center, connecting all components of the terminal using various interfaces and circuits. By running or executing software programs and / or modules stored in memory 909 and accessing data stored in memory 909, it executes various terminal functions and processes data, thereby providing overall terminal monitoring. Processor 910 may include one or more processing units; preferably, processor 910 may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 910.

[0205] The terminal 900 may also include a power supply 911 (such as a battery) for supplying power to various components. Preferably, the power supply 911 may be logically connected to the processor 910 through a power management system, thereby managing functions such as charging, discharging, and power consumption through the power management system.

[0206] In addition, the terminal 900 includes some functional modules not shown, which will not be described in detail here.

[0207] Preferably, an embodiment of the present invention further provides a terminal, comprising a processor 910, a memory 909, and a computer program stored in the memory 909 and operable on the processor 910, wherein the computer program is executed by the processor 910 to implement the above Figure 4 The various processes of the DCI transmission method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0208] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the above Figure 1 or Figure 4 The various processes of the DCI transmission method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0209] The computer-readable storage medium is, for example, a ROM, RAM, a magnetic disk or an optical disk.

[0210] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0211] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0212] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A method for transmitting downlink control information (DCI), used in a network-side device, characterized in that: The DCI transmission method includes: Sending physical downlink control channel PDCCH to the terminal; The first data carried in the PDCCH includes second data or the first data is data obtained by length encoding using the second data, the second data includes original DCI and corresponding check data, the original DCI includes the first-level DCI in the two-level DCI, and the check data in the first data is used to perform a first check on the first data, so that when the first check is successful, the original DCI is obtained from the first data. If the first check fails, the check data in the second data is used to perform a second check on the second data obtained after decoding the first data, so that when the second check is successful, the original DCI is obtained from the second data; The number of bits of the first data is the same as the number of transmission bits of the sum of the DCI size currently candidate for a terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one of the terminals.

2. The DCI transmission method according to claim 1, wherein: The DCI transmission method further includes: Sending first indication information, where the first indication information is used to indicate whether to perform length encoding on the second data, or to indicate an encoding method used to perform length encoding on the second data.

3. The DCI transmission method according to claim 1, wherein: The encoding method used for length encoding the second data is predefined by the protocol.

4. The DCI transmission method according to claim 2 or 3, wherein: The encoding method of the length encoding is repetition encoding or redundant encoding.

5. The DCI transmission method according to claim 1, wherein: The DCI transmission method further includes: Second indication information is received, where the second indication information is used to indicate a format or size of the DCI of the first data.

6. The DCI transmission method according to claim 1, wherein: The format or size of the DCI of the first data is predefined by a protocol.

7. A downlink control information (DCI) transmission method for a terminal, characterized in that: The DCI transmission method includes: Receiving a physical downlink control channel PDCCH; The first data carried in the PDCCH is data obtained by length encoding using the second data, the second data includes original DCI and corresponding check data, and the original DCI includes the first-level DCI in the two-level DCI; Detecting the PDCCH according to a target number of bits, where the target number of bits is any one of transmission bit numbers corresponding to multiple single-stage DCI formats or DCI sizes supported by the terminal; performing a first check on the first data based on the check data in the first data; If the first verification is correct, obtaining original DCI from the first data; In the case of an error in the first checksum, length decoding the first data is performed to obtain the second data; performing a second check on the second data based on the check data in the second data; If the second check is correct, obtaining the original DCI from the second data; If the second check fails, selecting the number of transmission bits corresponding to another single-level DCI format or DCI size from the numbers of transmission bits corresponding to multiple single-level DCI formats or DCI sizes supported by the terminal as the target number of bits to decode the first data, and repeating the first check and the second check processes; The number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the current candidate DCI format or DCI size of at least one terminal.

8. The DCI transmission method according to claim 7, wherein: The DCI transmission method further includes: First indication information is received, where the first indication information is used to indicate whether length encoding is performed on the second data, or to indicate an encoding method used for length encoding the second data.

9. The DCI transmission method according to claim 7, wherein: The encoding method used for length encoding the second data is predefined by the protocol.

10. The DCI transmission method according to claim 8 or 9, characterized in that: The encoding method is repeated encoding or redundant encoding.

11. A network side device, characterized in that: The network side device includes: a processor and a transceiver; The transceiver is used to send a physical downlink control channel PDCCH to the terminal; The first data carried in the PDCCH includes second data or the first data is data obtained by length encoding using the second data, the second data includes original DCI and corresponding check data, the original DCI includes the first-level DCI in the two-level DCI, and the check data in the first data is used to perform a first check on the first data, so that when the first check is successful, the original DCI is obtained from the first data. If the first check fails, the check data in the second data is used to perform a second check on the second data obtained after decoding the first data, so that when the second check is successful, the original DCI is obtained from the second data; The number of bits of the first data is the same as the number of transmission bits of the sum of the DCI size currently candidate for a terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one of the terminals.

12. A terminal, characterized in that: The terminal includes: a processor and a transceiver; The transceiver is configured to receive a physical downlink control channel (PDCCH); The first data carried in the PDCCH is data obtained by length encoding using the second data, the second data includes original DCI and corresponding check data, and the original DCI includes the first-level DCI in the two-level DCI; The processor is configured to detect the PDCCH according to a target number of bits, where the target number of bits is any one of the transmission bit numbers corresponding to multiple single-stage DCI formats or DCI sizes supported by the terminal; the processor being configured to perform a first check on the first data based on the check data in the first data; The processor is configured to obtain original DCI from the first data if the first verification is correct; the processor being configured to, in the event of a first check error, perform length decoding on the first data to obtain the second data; the processor being configured to perform a second check on the second data based on the check data in the second data; The processor is configured to obtain the original DCI from the second data if the second check is correct; The processor is configured to, if the second check fails, select, from the transmission bit quantities corresponding to multiple single-level DCI formats or DCI sizes supported by the terminal, another transmission bit quantity corresponding to the single-level DCI format or DCI size as a target bit quantity to decode the first data, and repeat the first check and the second check processes; The number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the current candidate DCI format or DCI size of at least one terminal.

13. A network side device, characterized in that: The network side equipment includes: A sending module, configured to send a physical downlink control channel (PDCCH) to a terminal; The first data carried in the PDCCH includes second data or the first data is data obtained by length encoding using the second data, the second data includes original DCI and corresponding check data, the original DCI includes the first-level DCI in the two-level DCI, and the check data in the first data is used to perform a first check on the first data, so that when the first check is successful, the original DCI is obtained from the first data. If the first check fails, the check data in the second data is used to perform a second check on the second data obtained after decoding the first data, so that when the second check is successful, the original DCI is obtained from the second data; The number of bits of the first data is the same as the number of transmission bits of the sum of the DCI size currently candidate for a terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the DCI format or DCI size currently candidate for at least one of the terminals.

14. A terminal, characterized in that: The terminal includes: A receiving module, configured to receive a physical downlink control channel (PDCCH); The first data carried in the PDCCH is data obtained by length encoding using the second data, the second data includes original DCI and corresponding check data, and the original DCI includes the first-level DCI in the two-level DCI; The decoding module is used to perform the following operations: Detecting the PDCCH according to a target number of bits, where the target number of bits is any one of transmission bit numbers corresponding to multiple single-stage DCI formats or DCI sizes supported by the terminal; performing a first check on the first data based on the check data in the first data; If the first verification is correct, obtaining original DCI from the first data; In the case of an error in the first checksum, length decoding the first data is performed to obtain the second data; performing a second check on the second data based on the check data in the second data; If the second check is correct, obtaining the original DCI from the second data; If the second check fails, selecting the number of transmission bits corresponding to another single-level DCI format or DCI size from the numbers of transmission bits corresponding to multiple single-level DCI formats or DCI sizes supported by the terminal as the target number of bits to decode the first data, and repeating the first check and the second check processes; The number of bits of the first data is the same as the number of transmission bits of the sum of the current candidate DCI size of the terminal and the corresponding number of check information bits, and the number of bits of the second data is not equal to the number of transmission bits corresponding to the current candidate DCI format or DCI size of at least one terminal.

15. A network side device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps in the downlink control information (DCI) transmission method according to any one of claims 1 to 6 are implemented.

16. A terminal, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps in the downlink control information DCI transmission method as claimed in any one of claims 7 to 10 are implemented.

17. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the computer program implements the steps in the downlink control information DCI transmission method according to any one of claims 1 to 6, or when the computer program is executed by the processor, the computer program implements the steps in the downlink control information DCI transmission method according to any one of claims 7 to 10.

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