Pdcch transmission method, terminal and network side device

Abstract

The application discloses a physical downlink control channel (PDCCH) transmission method, a terminal and a network side device, and belongs to the technical field of communication. The PDCCH transmission method comprises the following steps: a network side device determines a target position of a first complex symbol sequence in a second complex symbol sequence, and places the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is used for carrying data of a PDCCH; the network side device performs DFT or conversion precoding processing on the second complex symbol sequence to obtain a third complex symbol sequence; and the network side device maps the third complex symbol sequence to a target time-frequency resource and transmits the third complex symbol sequence.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a PDCCH transmission method, a terminal, and a network-side device. Background Technology

[0002] To support higher transmission rates and a wider range of service types, and considering the richer frequency resources above 52.6 GHz, further research is needed on mobile communications in this band. In wireless communication, for a given semiconductor technology, the maximum output power of a radio frequency power amplifier (PA) decreases as the frequency of the wireless signal increases. That is, compared to low- and mid-frequency mobile communications, the maximum output power of a PA is lower in high-frequency communication systems (e.g., fc > 52.6 GHz). Therefore, a signal waveform with a lower peak-to-average power ratio (PA-ARR) is required to improve the PA's power amplifier efficiency and thus ensure the output signal power.

[0003] In 5G NR systems, the uplink UL (Upper Link) uses either Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveforms, while the downlink DL (Lower Link) uses CP-OFDM waveforms. Compared to CP-OFDM waveforms, DFT-s-OFDM waveforms have a lower peak-to-average power ratio (PAPR). Compared to Single Carrier Frequency Domain Equalization (SC-FDE) waveforms, DFT-s-OFDM waveforms can allocate different subcarriers to different users, enabling multi-user communication. Therefore, in high-frequency communication systems, how to use DFT-s-OFDM waveforms to transmit the Physical Downlink Control Channel (PDCCH) in the DL is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] This application provides a PDCCH transmission method, terminal, and network-side device, which can solve the problem of how to use DFT-s-OFDM waveforms to transmit the physical downlink control channel (PDCCH).

[0005] Firstly, a PDCCH transmission method is provided for application in network-side devices, the method comprising:

[0006] The network-side device determines the target position of the first complex symbol sequence within the second complex symbol sequence, and places the first complex symbol sequence at the target position within the second complex symbol sequence; the first complex symbol sequence is used to carry PDCCH data;

[0007] The network-side device performs DFT or transformation precoding on the second complex symbol sequence to obtain a third complex symbol sequence;

[0008] The network-side device maps the third complex symbol sequence onto the target time-frequency resource and sends it.

[0009] Secondly, a PDCCH transmission method is provided for application in a terminal, the method comprising:

[0010] The terminal receives the fourth complex symbol sequence on the target time-frequency resource and performs an inverse discrete Fourier transform (IDFT) or an inverse conversion precoding operation on the fourth complex symbol sequence to obtain the fifth complex symbol sequence.

[0011] The terminal determines the position sequence of K candidate PDCCHs; where K is an integer greater than 0.

[0012] The terminal extracts the sixth complex symbol sequence from the fifth complex symbol sequence based on the position sequence of the K candidate PDCCHs;

[0013] The terminal performs blind detection based on the sixth complex number symbol sequence.

[0014] Thirdly, a PDCCH transmission device is provided, comprising:

[0015] The processing module is configured to determine the target position of the first complex symbol sequence in the second complex symbol sequence, and place the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is used to carry PDCCH data;

[0016] Perform DFT or transformation precoding on the second complex symbol sequence to obtain the third complex symbol sequence;

[0017] The transmitting module is used to map the second complex symbol sequence onto the target time-frequency resource and transmit it.

[0018] Fourthly, a PDCCH transmission device is provided, comprising:

[0019] The receiving module is used to receive the fourth complex symbol sequence on the target time-frequency resource;

[0020] The processing module is used to perform the Inverse Discrete Fourier Transform (IDFT) or the inverse transformation precoding operation on the fourth complex symbol sequence to obtain the fifth complex symbol sequence.

[0021] The processing module is further configured to determine the position sequence of K candidate PDCCHs; where K is an integer greater than 0.

[0022] Based on the position sequences of the K candidate PDCCHs, the sixth complex symbol sequence is extracted from the fifth complex symbol sequence;

[0023] Blind detection is performed based on the sixth complex number symbol sequence.

[0024] Fifthly, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0025] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to receive a fourth complex symbol sequence on a target time-frequency resource, and perform an inverse discrete Fourier transform (IDFT) or a conversion precoding inverse operation on the fourth complex symbol sequence to obtain a fifth complex symbol sequence; the processor is used to determine the position sequences of K candidate PDCCHs, where K is an integer greater than 0; based on the position sequences of the K candidate PDCCHs, a sixth complex symbol sequence is extracted from the fifth complex symbol sequence; and blind detection is performed based on the sixth complex symbol sequence.

[0026] In a seventh aspect, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0027] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the processor is configured to determine a target position of a first complex symbol sequence in a second complex symbol sequence, and place the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is configured to carry PDCCH data; the second complex symbol sequence is subjected to DFT or transform precoding processing to obtain a third complex symbol sequence, and the third complex symbol sequence is mapped onto a target time-frequency resource; the communication interface is configured to transmit the third complex symbol sequence mapped onto the target time-frequency resource.

[0028] A ninth aspect provides a communication system comprising: a terminal and a network-side device, wherein the terminal is configured to perform the steps of the PDCCH transmission method as described in the second aspect, and the network-side device is configured to perform the steps of the PDCCH transmission method as described in the first aspect.

[0029] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0030] Eleventhly, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0031] In a twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the PDCCH transmission method as described in the first or second aspect.

[0032] In this embodiment, the network-side device determines the target position of the first complex symbol sequence in the second complex symbol sequence and places the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is used to carry PDCCH data; the second complex symbol sequence is subjected to DFT or transform precoding processing to obtain a third complex symbol sequence, i.e., a DFT-s-OFDM waveform; the network-side device maps the third complex symbol sequence onto the target time-frequency resource and transmits it. In the above scheme, the network-side device can transmit PDCCH through the DFT-s-OFDM waveform, obtain a lower peak-to-average power ratio (PAPR), improve the power amplifier efficiency of the PA, and thus ensure the power of the output signal. Attached Figure Description

[0033] Figure 1 This is a structural diagram of a wireless communication system to which the embodiments of this application can be applied;

[0034] Figure 2 This is one of the system block diagrams of DFT-s-OFDM provided in the embodiments of this application;

[0035] Figure 3 This is one of the CORESET schematic diagrams provided in the embodiments of this application;

[0036] Figure 4 This is the second schematic diagram of CORESET provided in the embodiments of this application;

[0037] Figure 5 This is the third schematic diagram of the CORESET provided in the embodiments of this application;

[0038] Figure 6 This is one of the flowcharts illustrating the PDCCH transmission method provided in the embodiments of this application;

[0039] Figure 7 This is the second system block diagram of DFT-s-OFDM provided in the embodiments of this application;

[0040] Figure 8 This is a schematic diagram of the second position index group provided in an embodiment of this application;

[0041] Figure 9 This is the third system block diagram of DFT-s-OFDM provided in the embodiments of this application;

[0042] Figure 10 This is one of the numbering diagrams of the second position index group provided in the embodiments of this application;

[0043] Figure 11 This is the second schematic diagram of the numbering of the second position index group provided in the embodiments of this application;

[0044] Figure 12 This is the third schematic diagram of the numbering of the second position index group provided in the embodiments of this application;

[0045] Figure 13 This is a second schematic flowchart of the PDCCH transmission method provided in the embodiments of this application;

[0046] Figure 14 This is one of the structural schematic diagrams of the PDCCH transmission device provided in the embodiments of this application;

[0047] Figure 15 This is a second schematic diagram of the structure of the PDCCH transmission device provided in the embodiments of this application;

[0048] Figure 16 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application;

[0049] Figure 17 This is a schematic diagram of the hardware structure of the terminal provided in the embodiments of this application;

[0050] Figure 18 This is a schematic diagram of the network-side device according to an embodiment of this application. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0052] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0053] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0054] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. Terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of terminal 11 is not limited in this embodiment. Network-side equipment 12 may include access network equipment or core network equipment. Access network equipment 12 may also be referred to as radio access network equipment, radio access network (RAN), radio access network function, or radio access network unit. Access network equipment 12 may include base stations, WLAN access points, or WiFi nodes, etc. Base stations may be referred to as Node B, evolved Node B (eNB), access point, base transceiver station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B node, Transmitting Receiving Point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only a base station in an NR system is used as an example for description, and the specific type of base station is not limited.

[0055] Figure 2This is a system block diagram of DFT-s-OFDM. Compared to OFDM, the transmitter introduces an M-point DFT operation before the N-point IFFT, which significantly reduces the PAPR of the transmitter's output signal.

[0056] OFDM-based PDCCH:

[0057] A PDCCH consists of one or more Control Channel Elements (CCEs), and the number of CCEs that make up a PDCCH is called the aggregation level (AL) of the PDCCH.

[0058] A CCE consists of 6 Resource Element Groups (REGs), where each REG refers to a Resource Block (RB) on an OFDM symbol.

[0059] A CORESET (Control Resource Set) consists of frequency domain... Each RB and time domain It consists of OFDM symbols.

[0060] Figure 3 , Figure 4 , Figure 5 These are schematic diagrams showing CORESET values ​​of 1, 2, and 3 for N_CORESET_symb.

[0061] The PDCCH transmission method provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0062] Figure 6 This is a schematic flowchart of an embodiment of the PDCCH transmission method provided by this invention. Figure 6 As shown, the method provided in this embodiment includes:

[0063] Step 101: The network-side device determines the target position of the first complex symbol sequence in the second complex symbol sequence, and places the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is used to carry PDCCH data;

[0064] Specifically, the network-side device can place a first complex symbol sequence of length M1 at the target position of a second complex symbol sequence of length M2, wherein the first complex symbol sequence is used to carry the transmission data of the PDCCH;

[0065] M1 and M2 are integers greater than 0, and M1 is greater than or equal to M2.

[0066] The target position can be a continuous or non-continuous position in the second complex symbol sequence.

[0067] Step 101 can be achieved through... Figure 7 The module implementation involves selecting and placing the element at a chosen location.

[0068] Step 102: The network-side device performs DFT or transformation precoding on the second complex symbol sequence to obtain the third complex symbol sequence;

[0069] Specifically, the second complex symbol sequence is processed by DFT or Transform Precoding to obtain a third complex symbol sequence of length M2.

[0070] Optionally, the length of the second complex symbol sequence is related to at least one of the following:

[0071] The time domain length of the target time-frequency resource;

[0072] The frequency domain length of the target time-frequency resource;

[0073] The number of subcarriers contained in a Physical Resource Block (PRB);

[0074] The time-frequency resources used for transmitting reference signals in the target time-frequency resources.

[0075] Step 103: The network-side device maps the third complex symbol sequence onto the target time-frequency resource and sends it.

[0076] Specifically, the third complex symbol sequence obtained by DFT or transformation precoding is mapped onto the target time-frequency resource for transmission.

[0077] Optionally, the target time-frequency resource is the time-frequency resource of the configuration search space or the control resource set CORESET.

[0078] For cases where the search space or CORESET occupies only one OFDM symbol. Figure 7 In the diagram, the data marked (1) is the first complex symbol sequence of length M1, the data marked (2) is the second complex symbol sequence of length M2, and the data marked (3) is the third complex symbol sequence of length M2.

[0079] For cases where the search space or CORESET occupies more than one OFDM symbol, Figure 7 The data marked (1), (2), and (3) have lengths M1, M2, and M2 after being accumulated by multiple OFDM symbols, respectively. At this point, the sequence lengths of the DFT and IDFT on each OFDM symbol are:

[0080] The number of resource blocks (RBs) occupied by CORESET on this OFDM symbol multiplied by the number of subcarriers contained in each RB;

[0081] Alternatively, the number of RBs occupied by the CORESET on the OFDM symbol is multiplied by the number of subcarriers contained in each RB, and then the number of resource units (REs) occupied by the reference signal is subtracted.

[0082] Using this method, network-side devices can transmit PDCCH via DFT-s-OFDM waveforms to obtain a lower peak-to-average power ratio (PAPR), and terminals can correctly detect PDCCH.

[0083] In this embodiment, the network-side device determines the target position of the first complex symbol sequence within the second complex symbol sequence and places the first complex symbol sequence at the target position within the second complex symbol sequence. The first complex symbol sequence is used to carry PDCCH data. The second complex symbol sequence is subjected to DFT or transform precoding processing to obtain a third complex symbol sequence, i.e., a DFT-s-OFDM waveform. The network-side device maps the third complex symbol sequence onto the target time-frequency resource and transmits it. In the above scheme, the network-side device can transmit PDCCH through the DFT-s-OFDM waveform, obtain a lower peak-to-average power ratio (PAPR), improve the power amplifier efficiency of the PA, and thus ensure the power of the output signal.

[0084] In one embodiment, the target position is the position corresponding to the position sequence of the target PDCCH among K candidate PDCCHs; where K is an integer greater than 0.

[0085] Specifically, the position corresponding to the position sequence of the target PDCCH among the K candidate PDCCHs is taken as the target position, and the first complex symbol sequence is located at the target position in the second complex symbol sequence. K can be, for example, as shown in Table 1:

[0086] Table 1

[0087]

[0088]

[0089] Optionally, in step 102, if the search space or CORESET occupies multiple OFDM symbols, the network-side device starts from the first OFDM symbol occupied by the search space or CORESET and performs DFT or transmission precoding on the second complex symbol sequence symbol by symbol to obtain the third complex symbol sequence.

[0090] In one embodiment, step 101, "determining the target position of the first complex symbol sequence in the second complex symbol sequence," can be achieved in the following way:

[0091] The network-side device divides the position index of the second complex symbol sequence into X3 first position index groups;

[0092] The network-side device maps the location sequence of the target PDCCH to X2 first location index groups out of X3 first location index groups;

[0093] The network-side device uses the locations corresponding to the X2 first location index groups as the target locations;

[0094] Wherein, X2 and X3 are integers greater than 0, and X3 is greater than or equal to X2.

[0095] Specifically, the network-side device groups the position indices of the second complex symbol sequence to obtain X3 first position index groups, and maps the position sequence of the target PDCCH to X2 first position index groups among the X3 first position index groups. The sequence of position index values ​​contained in the X2 first position index groups is the position sequence of the target PDCCH, and the position corresponding to the X2 first position index groups is the target position.

[0096] Optionally, the network-side device maps the position sequence of the target PDCCH to X2 first position index groups in X3 first position index groups based on the index of the target PDCCH in K candidate PDCCHs.

[0097] For example, the index of the target PDCCH in the K candidate PDCCHs is 2, K is 2, and the index of the target PDCCH in the K candidate PDCCHs can start from 0. Assuming X3 is 6, X2 is 2, and the number of the first position index group of X3 is {0,1,2,3,4,5}, the position sequence of the target PDCCH can be mapped to the 4th and 5th first position index groups.

[0098] Optionally, the location sequence of the target PDCCH is mapped to X2 of the X3 first location index groups, which is related to at least one of the following:

[0099] M1, X2, X3, the number K of candidate PDCCHs associated with M1 or X2, cell index, and radio network temporary identifier RNTI;

[0100] Where M1 is the length of the first complex symbol sequence.

[0101] Optionally, the X2 first position index groups can be consecutive X2 position index groups from the X3 first position index groups.

[0102] Optionally, X2 is related to the aggregation level.

[0103] Optionally, the step "dividing the position indices of the second complex number symbol sequence into X3 first position index groups" specifically includes:

[0104] The network-side device divides the position index of the second complex symbol sequence into X1 second position index groups;

[0105] The network-side device divides the X1 second location index groups into X3 first location index groups;

[0106] Where X1 is greater than or equal to X3.

[0107] Specifically, the position index of the second complex symbol sequence (e.g., 0 to (M2-1)) is divided into X1 second position index groups; this step is equivalent to dividing REG in the time domain, and then dividing the X1 second position index groups into X3 first position index groups; this step is equivalent to dividing CCE in the time domain.

[0108] In the above implementation, by dividing the position index of the second complex symbol sequence into X1 second position index groups, it is equivalent to dividing REG in the time domain; further, dividing the X1 second position index groups into X3 first position index groups is equivalent to dividing CCE in the time domain, and then mapping the position sequence of the target PDCCH to X2 first position index groups in the X3 first position index groups, that is, on some CCE in the time domain, i.e. at the target position, the first complex symbol sequence is placed at the target position in the second complex symbol sequence.

[0109] Figure 8 Two methods are shown for dividing the position index of the second complex number symbol sequence into X1 second position index groups. Optionally, as... Figure 8 As shown, the second position index groups can be divided into X1 groups in the following way:

[0110] Within each OFDM symbol range occupied by the search space or CORESET, the network-side device continuously divides the position index of the second complex symbol sequence into X1' second position index groups; or,

[0111] Within each OFDM symbol range occupied by the search space or CORESET, the network-side device divides the position index of the second complex symbol sequence into X1' second position index groups in a uniformly distributed manner;

[0112] Among them, the X1 second position index groups are obtained from the X1' second position index groups corresponding to the range of each OFDM symbol in the multiple OFDM symbols occupied by the search space or CORESET.

[0113] Specifically, the position index of the second complex symbol sequence (e.g., 0 to (M2-1)) is divided into X1 second position index groups, for example, by a continuous concentrated method or a uniformly distributed method.

[0114] Figure 8 In the above, M2 = 72, X1 = 6, the number of OFDM symbols occupied by the search space or CORESET is 1, and X1' is equal to X1.

[0115] In the above implementation, the second position index group is divided in a uniform and dispersed manner so that the transmission of complex symbols of candidate PDCCH is as dispersed as possible in time, so as to obtain time diversity and still obtain good transmission performance when the wireless channel has rapid fading.

[0116] Optionally, the size of each first position index group, the size of each second position index group, or the number X1, X2, and X3, are predefined by the protocol or configured by the network-side device.

[0117] Optionally, the network-side device can perform step 101 through an interleaver, wherein the position index of the second complex symbol sequence can be divided into X1 second position index groups, the X1 second position index groups can be divided into X3 first position index groups, the position sequence of the target PDCCH can be mapped to X2 first position index groups in the X3 first position index groups, and the position corresponding to the X2 first position index groups can be used as the target position.

[0118] Specifically, in order to achieve Figure 8 The uniformly distributed partitioning method can be addressed using an "interleave" at the transmitting end and a "de-interleave" at the receiving end, such as... Figure 9 As shown.

[0119] Figure 9 The interweaver is Figure 7 One implementation method is to select a location and place the module. Figure 9 The uninterruptor is Figure 7 One implementation method is to select a location and extract the module.

[0120] In one embodiment, the first position index group can be divided in the following way:

[0121] The network-side device numbers the X1 second location index groups;

[0122] Based on the numbering of the second location index group, the network-side device divides the X1 second location index groups into X3 first second location index groups.

[0123] Specifically, first, the second position index group is numbered, such as... Figure 10 As shown, the second position index group is numbered from 0 to 5 in OFDM.

[0124] Then, the second position index groups are divided into X3 first position index groups in a continuous and evenly distributed manner. The first position index groups are numbered according to the minimum (or maximum) value of the number of the second position index group contained within the first position index group. For example, first position index group 0 contains second position index groups 0 to (X1 / X2-1).

[0125] Alternatively, the second position index group can be numbered in the following way:

[0126] Within the search space or the range of multiple OFDM symbols occupied by CORESET, the network-side device numbers the second position index group according to the OFDM symbol priority.

[0127] Within the search space or each OFDM symbol range occupied by the CORESET, the network-side device numbers the second location index groups according to the order of the minimum or maximum value of the location indexes contained in each second location index group.

[0128] Specifically, for the search space or the range of multiple OFDM symbols occupied by the CORESET, firstly, the second position index group is numbered according to the OFDM symbol priority; such as Figure 11 As shown, within the search space or the two OFDM symbols occupied by the CORESET, the second position index group is numbered according to the OFDM symbol priority; for example... Figure 12 As shown, within the search space or the three OFDM symbols occupied by the CORESET, the second position index groups are numbered according to OFDM symbol priority. Within each OFDM symbol range occupied by the search space or the CORESET, the second position index groups are numbered in order of the smallest (or largest) position index contained within each second position index group.

[0129] Other examples Figure 11 As shown, within the occupied OFDM symbol range, the second position index groups are numbered according to the order of the minimum or maximum value of the position indexes contained in each second position index group. For example, assuming that the second position index group contains 12 position indices, the position indexes contained in second position index group 0 are 0-11, and the position indexes contained in second position index group 2 are 24-35. The minimum values ​​are 0 and 24, and the maximum values ​​are 11 and 35. Therefore, the number of second position index group 0 is less than the number of second position index group 2.

[0130] in, Figures 10-12 In OFDM, the symbols Z0, Z1, and Z2 can be continuous or discontinuous.

[0131] In the above implementation, within the search space or the range of multiple OFDM symbols occupied by CORESET, the second position index groups are numbered according to the priority of OFDM symbols; within each OFDM symbol range occupied by CORESET, the second position index groups are numbered according to the order of the minimum or maximum value of the position index contained in each second position index group, which has low implementation complexity.

[0132] Optionally, the length of the second complex symbol sequence is any one of the following:

[0133]

[0134]

[0135] Where, N f This indicates the number of resource blocks (RBs) occupied by the search space or CORESET. L1 represents the number of subcarriers contained in each RB, L1 represents the number of OFDM symbols occupied by the search space or CORESET, and Nr represents the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space or CORESET.

[0136] Specifically, the length of the second complex symbol sequence can be any of the following:

[0137] The search space is calculated by multiplying the number of red-base blocks (RBs) by the number of subcarriers contained in each RB, and then multiplying by the number of OFDM symbols occupied by the search space; or,

[0138] The number of RBs occupied by the CORESET multiplied by the number of subcarriers contained in each RB, then multiplied by the number of OFDM symbols occupied by the CORESET; or,

[0139] Multiply the number of RBs in the search space by the number of subcarriers contained in each RB, then multiply by the number of OFDM symbols in the search space, and then subtract the number of resource elements (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space; or,

[0140] Multiply the number of RBs occupied by the CORESET by the number of subcarriers contained in each RB, then multiply by the number of OFDM symbols occupied by the CORESET, and then subtract the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the CORESET.

[0141] Optionally, the PDCCH transmission method further includes:

[0142] The network-side equipment performs beamforming precoding on the target time-frequency resources with a precoding granularity of X4 RBs; X4 is an integer greater than 0; and the same precoding vector is used within the X4 RBs.

[0143] Specifically, when transmitting PDCCH on target time-frequency resources, network-side equipment can perform beamforming precoding on DFT-s-OFDM waveforms with a precoding granularity of X4 RBs, using the same precoding vector within each X4 RB, which facilitates decoding on the terminal side.

[0144] Optionally, X4 and N f Related, or related to the search space or other CORESET parameters, such as the number of consecutive PRBs in the frequency domain.

[0145] In the above implementation, a precoding granularity was designed for the RB resources occupied by the search space in order to achieve a balance between precoding flexibility and channel estimation accuracy.

[0146] Figure 13 This is the second schematic flowchart of the PDCCH transmission method provided in the embodiments of this application. Figure 13 As shown, the method provided in this embodiment includes:

[0147] Step 201: The terminal receives the fourth complex symbol sequence on the target time-frequency resource and performs the inverse discrete Fourier transform (IDFT) or the inverse conversion precoding operation on the fourth complex symbol sequence to obtain the fifth complex symbol sequence.

[0148] Step 202: The terminal determines the position sequence of K candidate PDCCHs; K is an integer greater than 0;

[0149] Step 203: Based on the position sequences of K candidate PDCCHs, the terminal extracts the sixth complex symbol sequence from the fifth complex symbol sequence;

[0150] Step 204: The terminal performs blind detection based on the sixth complex number symbol sequence.

[0151] Specifically, the terminal receives the fourth complex symbol sequence on the target time-frequency resource. On the target time-frequency resource received by the terminal, the network-side device may send a PDCCH, or it may not send a PDCCH.

[0152] When the network-side device transmits a PDCCH on the target time-frequency resource, the fourth complex symbol sequence can be the third complex symbol sequence.

[0153] Steps 202 and 203 can be achieved through... Figure 7 The module implementation involves selecting a location and extracting it.

[0154] Optionally, the target time-frequency resource is a time-frequency resource of the configuration search space or the control resource set CORESET.

[0155] Optionally, the terminal determines the position sequence of K candidate PDCCHs, including:

[0156] The terminal divides the position index of the fifth complex number symbol sequence into X3 first position index groups;

[0157] Based on the K candidate PDCCHs, the terminal determines K first position index groups from the X3 first position index groups; each of the K first position index groups includes X2 first position index groups.

[0158] The terminal determines the K groups of first location indexes as the location sequence of the K candidate PDCCHs;

[0159] Wherein, X2 and X3 are integers greater than 0, and X3 is greater than or equal to X2.

[0160] Optionally, the terminal divides the position index of the fifth complex number symbol sequence into X3 first position index groups, including:

[0161] The terminal divides the position index of the fifth complex number symbol sequence into X1 second position index groups;

[0162] The terminal divides the X1 second position index groups into the X3 first position index groups;

[0163] Wherein, X1 is greater than or equal to X3.

[0164] Optionally, the terminal divides the position index of the fifth complex number symbol sequence into X1 second position index groups, including:

[0165] The terminal, within the search space or each OFDM symbol range occupied by CORESET, continuously divides the position index of the fifth complex symbol sequence into X1' groups of the second position index; or,

[0166] The terminal divides the position index of the fifth complex symbol sequence into X1' second position index groups in a uniformly distributed manner within each OFDM symbol range occupied by the search space or CORESET.

[0167] Wherein, the X1 second position index groups are obtained from the X1' second position index groups corresponding to the range of each OFDM symbol among the multiple OFDM symbols occupied by the search space or CORESET.

[0168] Optionally, the terminal determines the position sequence of K candidate PDCCHs, including:

[0169] The terminal determines the position sequence of K candidate PDCCHs using a deinterleaver.

[0170] The terminal extracts a sixth complex symbol sequence from the fifth complex symbol sequence based on the position sequences of the K candidate PDCCHs, including:

[0171] The terminal extracts the sixth complex symbol sequence from the fifth complex symbol sequence using a deinterleaver based on the position sequence of the K candidate PDCCHs.

[0172] Optionally, the terminal divides the X1 second location index groups into the X3 first location index groups, including:

[0173] The terminal numbers the X1 second location index groups;

[0174] The terminal divides the X1 second location index groups into the X3 first location index groups based on the number of the second location index group.

[0175] Optionally, the terminal numbers the X1 second location index groups, including:

[0176] The terminal numbers the second location index group within the search space or the range of multiple OFDM symbols occupied by CORESET, according to the OFDM symbol priority.

[0177] The terminal numbers the second location index groups according to the order of the minimum or maximum value of the location indexes contained in each second location index group within the search space or each OFDM symbol range occupied by CORESET.

[0178] Optionally, the terminal determines K first position index groups from the X3 first position index groups based on the K candidate PDCCHs, which are related to at least one of the following:

[0179] M1, X2, X3, the number K of candidate PDCCHs associated with M1 or X2, the cell index, and the radio network temporary identifier RNTI; wherein, M1 is the length of the sixth complex symbol sequence.

[0180] Optionally, performing an inverse discrete Fourier transform (IDFT) or a transform precoding inverse operation on the fourth complex symbol sequence to obtain a fifth complex symbol sequence includes:

[0181] When the search space or CORESET occupies multiple OFDM symbols, the terminal starts from the first OFDM symbol occupied by the search space or CORESET and performs IDFT or inverse transformation precoding operation on the fourth complex symbol sequence symbol by symbol by symbol to obtain the fifth complex symbol sequence.

[0182] Optionally, the length of the fifth complex symbol sequence is related to at least one of the following:

[0183] The time domain length of the target time-frequency resource;

[0184] The frequency domain length of the target time-frequency resource;

[0185] The number of subcarriers contained in a Physical Resource Block (PRB);

[0186] The target time-frequency resources are the time-frequency resources used for transmitting reference signals.

[0187] Optionally, the length of the fifth complex symbol sequence is any one of the following:

[0188]

[0189]

[0190] Where, N f This indicates the number of resource blocks (RBs) occupied by the search space or CORESET. L1 represents the number of subcarriers contained in each RB, L1 represents the number of OFDM symbols occupied by the search space or CORESET, and Nr represents the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space or CORESET.

[0191] Optionally, the terminal may identify (or assume) that the precoding granularity is X5 consecutive RBs in the frequency domain; X5 is an integer greater than 0.

[0192] The terminal may assume that the same precoding vector is used within 5 RBs.

[0193] Optionally, X5 can be the same as or different from X4; for example, X5 can be greater than X4.

[0194] Optionally, at least one of the following is configured by the network-side device or predefined by the protocol:

[0195] The size of the first position index group, the size of the second position index group, and X1, X2, X3, and K.

[0196] Optionally, X5 is configured for network-side devices or predefined by protocols.

[0197] The method in this embodiment is similar to the network-side method embodiment in terms of its specific implementation process and technical effects. For details, please refer to the detailed description in the network-side method embodiment, which will not be repeated here.

[0198] The PDCCH transmission method provided in this application can be executed by a PDCCH transmission device. This application uses the execution of the PDCCH transmission method by a PDCCH transmission device as an example to illustrate the PDCCH transmission device provided in this application.

[0199] Figure 14 This is one of the structural schematic diagrams of the PDCCH transmission device provided in this application. For example... Figure 14 As shown, the PDCCH transmission device provided in this embodiment includes:

[0200] Processing module 210 is configured to determine the target position of the first complex symbol sequence in the second complex symbol sequence, and place the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is used to carry PDCCH data;

[0201] Perform DFT or transformation precoding on the second complex symbol sequence to obtain the third complex symbol sequence;

[0202] The transmitting module 220 is used by the network-side device to map the third complex symbol sequence onto the target time-frequency resource and transmit it.

[0203] Optionally, the target position is the position corresponding to the position sequence of the target PDCCH among K candidate PDCCHs; where K is an integer greater than 0.

[0204] The target time-frequency resource is the time-frequency resource of the configuration search space or control resource set CORESET.

[0205] Optionally, the processing module 210 is specifically used for:

[0206] The position index of the second complex number symbol sequence is divided into X3 first position index groups;

[0207] Map the position sequence of the target PDCCH to the X2 first position index groups in the X3 first position index groups;

[0208] The network-side device uses the positions corresponding to the X2 first position index groups as the target positions;

[0209] Wherein, X2 and X3 are integers greater than 0, and X3 is greater than or equal to X2.

[0210] Optionally, the processing module 210 is specifically used for:

[0211] Divide the position index of the second complex number symbol sequence into X1 second position index groups;

[0212] The X1 second position index groups are divided into the X3 first position index groups;

[0213] Wherein, X1 is greater than or equal to X3.

[0214] Optionally, the processing module 210 is specifically used for:

[0215] Within each OFDM symbol range occupied by the search space or CORESET, the position index of the second complex symbol sequence is continuously divided into X1' groups of the second position index; or,

[0216] Within each OFDM symbol range occupied by the search space or CORESET, the position index of the second complex symbol sequence is divided into X1' second position index groups in a uniformly distributed manner;

[0217] Wherein, the X1 second position index groups are obtained from the X1' second position index groups corresponding to the range of each OFDM symbol among the multiple OFDM symbols occupied by the search space or CORESET.

[0218] Optionally, the processing module 210 is specifically used for:

[0219] The first complex symbol sequence is determined in the second complex symbol sequence by an interleaver, and the first complex symbol sequence is placed in the target position in the second complex symbol sequence.

[0220] Optionally, the processing module 210 is specifically used for:

[0221] The X1 second position index groups are numbered;

[0222] Based on the numbering of the second position index group, the X1 second position index groups are divided into the X3 first position index groups.

[0223] Optionally, the processing module 210 is specifically used for:

[0224] Based on the index of the target PDCCH in the K candidate PDCCHs, the position sequence of the target PDCCH is mapped to the X2 first position index groups in the X3 first position index groups.

[0225] Optionally, the processing module 210 is specifically used for:

[0226] Within the search space or the range of multiple OFDM symbols occupied by CORESET, the second position index group is numbered according to the OFDM symbol priority.

[0227] Within each OFDM symbol range occupied by the search space or CORESET, the second location index groups are numbered according to the order of the minimum or maximum value of the location index contained in each second location index group.

[0228] Optionally, mapping the location sequence of the target PDCCH to X2 of the X3 first location index groups is related to at least one of the following:

[0229] M1, X2, X3, the number K of candidate PDCCHs associated with M1 or X2, the cell index, and the radio network temporary identifier RNTI; wherein, M1 is the length of the first complex symbol sequence.

[0230] Optionally, the length of the second complex symbol sequence is related to at least one of the following:

[0231] The time domain length of the target time-frequency resource;

[0232] The frequency domain length of the target time-frequency resource;

[0233] The number of subcarriers contained in a Physical Resource Block (PRB);

[0234] The target time-frequency resources are the time-frequency resources used for transmitting reference signals.

[0235] Optionally, the length of the second complex symbol sequence is any one of the following:

[0236]

[0237]

[0238] Where, N f This indicates the number of resource blocks (RBs) occupied by the search space or CORESET. L1 represents the number of subcarriers contained in each RB, L1 represents the number of OFDM symbols occupied by the search space or CORESET, and Nr represents the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space or CORESET.

[0239] Optionally, the processing module 210 is also used for:

[0240] Beamforming precoding is performed on the target time-frequency resource with a precoding granularity of X4 RBs; where X4 is an integer greater than 0; and the same precoding vector is used within the X4 RBs.

[0241] Optionally, the processing module 210 is specifically used for:

[0242] When the search space or CORESET occupies multiple OFDM symbols, starting from the first OFDM symbol occupied by the search space or CORESET, the second complex symbol sequence is subjected to DFT or transformation precoding processing on each OFDM symbol to obtain the third complex symbol sequence.

[0243] Optionally, at least one of the following is configured by the network-side device or predefined by the protocol:

[0244] The size of the first position index group, the size of the second position index group, and X1, X2, X3, and K.

[0245] Optionally, X4 is configured by the network-side device or predefined by the protocol.

[0246] The apparatus of this embodiment can be used to execute the method of any of the aforementioned network-side method embodiments. Its specific implementation process and technical effects are similar to those in the network-side method embodiments. For details, please refer to the detailed description in the network-side method embodiments, which will not be repeated here.

[0247] Figure 15 This is the second schematic diagram of the PDCCH transmission device provided in this application. Figure 15 As shown, the PDCCH transmission device provided in this embodiment includes:

[0248] Receiver module 310 is used to receive the fourth complex symbol sequence on the target time-frequency resource;

[0249] Processing module 320 is used to perform Inverse Discrete Fourier Transform (IDFT) or Inverse Transform Precoding on the fourth complex symbol sequence to obtain the fifth complex symbol sequence;

[0250] The processing module 320 is further configured to determine the position sequence of K candidate PDCCHs; where K is an integer greater than 0.

[0251] Based on the position sequences of the K candidate PDCCHs, the sixth complex symbol sequence is extracted from the fifth complex symbol sequence;

[0252] Blind detection is performed based on the sixth complex number symbol sequence.

[0253] Optionally, the target time-frequency resource is a time-frequency resource of the configuration search space or the control resource set CORESET.

[0254] Optionally, the processing module 320 is specifically used for:

[0255] The position index of the fifth complex number symbol sequence is divided into X3 first position index groups;

[0256] Based on the K candidate PDCCHs, K first position index groups are determined from the X3 first position index groups; each of the K first position index groups includes X2 first position index groups.

[0257] The K groups of first position indexes are determined as the position sequence of the K candidate PDCCHs;

[0258] Wherein, X2 and X3 are integers greater than 0, and X3 is greater than or equal to X2.

[0259] Optionally, the processing module 320 is specifically used for:

[0260] The position index of the fifth complex number symbol sequence is divided into X1 second position index groups;

[0261] The X1 second position index groups are divided into the X3 first position index groups;

[0262] Wherein, X1 is greater than or equal to X3.

[0263] Optionally, the processing module 320 is specifically used for:

[0264] Within each OFDM symbol range occupied by the search space or CORESET, the position index of the fifth complex symbol sequence is continuously divided into X1' groups of the second position index; or,

[0265] Within each OFDM symbol range occupied by the search space or CORESET, the position index of the fifth complex symbol sequence is divided into X1' second position index groups in a uniformly distributed manner;

[0266] Wherein, the X1 second position index groups are obtained from the X1' second position index groups corresponding to the range of each OFDM symbol among the multiple OFDM symbols occupied by the search space or CORESET.

[0267] Optionally, the processing module 320 is specifically used for:

[0268] The position sequence of K candidate PDCCHs is determined by a deinterleaver;

[0269] The sixth complex symbol sequence is extracted from the fifth complex symbol sequence by a deinterleaver based on the position sequence of the K candidate PDCCHs.

[0270] Optionally, the processing module 320 is specifically used for:

[0271] The X1 second position index groups are numbered;

[0272] Based on the numbering of the second position index group, the X1 second position index groups are divided into the X3 first position index groups.

[0273] Optionally, the processing module 320 is specifically used for:

[0274] Within the search space or the range of multiple OFDM symbols occupied by CORESET, the second position index group is numbered according to the OFDM symbol priority.

[0275] Within each OFDM symbol range occupied by the search space or CORESET, the second location index groups are numbered according to the order of the minimum or maximum value of the location index contained in each second location index group.

[0276] Optionally, the terminal determines K first position index groups from the X3 first position index groups based on the K candidate PDCCHs, which are related to at least one of the following:

[0277] M1, X2, X3, the number K of candidate PDCCHs associated with M1 or X2, the cell index, and the radio network temporary identifier RNTI; wherein, M1 is the length of the sixth complex symbol sequence.

[0278] Optionally, the processing module 320 is specifically used for:

[0279] When the search space or CORESET occupies multiple OFDM symbols, the terminal starts from the first OFDM symbol occupied by the search space or CORESET and performs IDFT or inverse transformation precoding operation on the fourth complex symbol sequence symbol by symbol by symbol to obtain the fifth complex symbol sequence.

[0280] Optionally, the length of the fifth complex symbol sequence is related to at least one of the following:

[0281] The time domain length of the target time-frequency resource;

[0282] The frequency domain length of the target time-frequency resource;

[0283] The number of subcarriers contained in a Physical Resource Block (PRB);

[0284] The target time-frequency resources are the time-frequency resources used for transmitting reference signals.

[0285] Optionally, the length of the fifth complex symbol sequence is any one of the following:

[0286]

[0287]

[0288] Where, N f This indicates the number of resource blocks (RBs) occupied by the search space or CORESET. L1 represents the number of subcarriers contained in each RB, L1 represents the number of OFDM symbols occupied by the search space or CORESET, and Nr represents the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space or CORESET.

[0289] Optionally, the processing module 320 is further configured to: identify the precoding granularity as X5 consecutive PRBs in the frequency domain; X5 is an integer greater than 0.

[0290] Optionally, at least one of the following is configured by the network-side device or predefined by the protocol:

[0291] The size of the first position index group, the size of the second position index group, and X1, X2, X3, and K.

[0292] Optionally, X5 is configured for network-side devices or predefined by protocols.

[0293] The apparatus of this embodiment can be used to execute the method of any of the aforementioned terminal-side method embodiments. Its specific implementation process and technical effects are similar to those of the terminal-side method embodiments. For details, please refer to the detailed description in the terminal-side method embodiments, which will not be repeated here.

[0294] The PDCCH transmission device in this application embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the type.

[0295] The PDCCH transmission device provided in this application embodiment can achieve... Figures 6 to 13 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0296] Optional, such as Figure 16As shown in the illustration, this application also provides a communication device 1600, including a processor 1601 and a memory 1602. The memory 1602 stores a program or instructions that can run on the processor 1601. For example, when the communication device 1600 is a terminal, the program or instructions executed by the processor 1601 implement the various steps of the above-described PDCCH transmission method embodiment and achieve the same technical effect. When the communication device 1600 is a network-side device, the program or instructions executed by the processor 1601 implement the various steps of the above-described PDCCH transmission method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0297] This application embodiment also provides a terminal, including a processor and a communication interface. The communication interface is used to receive a PDCCH sent by a network-side device. The PDCCH includes a second complex symbol sequence mapped onto a target time-frequency resource. The second complex symbol sequence number is obtained by performing a DFT or transform precoding on a first complex symbol sequence. The target location of the first complex symbol sequence includes a third complex symbol sequence. The length of the third complex symbol sequence is less than or equal to the length of the first complex symbol sequence. The third complex symbol sequence is used to carry the transmission data of the PDCCH. The processor is used to acquire the transmission data of the PDCCH at the target location. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 17 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0298] The terminal 1000 includes, but is not limited to, at least some of the following components: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0299] Those skilled in the art will understand that the terminal 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 17 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0300] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The GPU 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1007 includes at least one of a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, joysticks, etc., which will not be described in detail here.

[0301] In this embodiment, the radio frequency unit 1001 receives downlink data from the network-side device and transmits it to the processor 1010 for processing. Additionally, the radio frequency unit 1001 can send uplink data to the network-side device. Typically, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, and a duplexer.

[0302] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback function, image playback function, etc.). Furthermore, the memory 1009 may include volatile memory or non-volatile memory, or both. It may include high-speed random access memory and may also include non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1009 in this embodiment includes, but is not limited to, these and any other suitable types of memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0303] Processor 1010 may include one or more processing units; optionally, processor 1010 may integrate an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1010.

[0304] Among them, the radio frequency unit 1001 is used for the fourth complex symbol sequence on the target time and frequency resources;

[0305] Processor 1010 is used to perform Inverse Discrete Fourier Transform (IDFT) or Inverse Transform Precoding on the fourth complex symbol sequence to obtain a fifth complex symbol sequence;

[0306] The processor 1010 is further configured to determine the position sequence of K candidate PDCCHs; where K is an integer greater than 0.

[0307] Based on the position sequences of the K candidate PDCCHs, the sixth complex symbol sequence is extracted from the fifth complex symbol sequence;

[0308] Blind detection is performed based on the sixth complex number symbol sequence.

[0309] In the above implementation, the terminal determines the position sequence of K candidate PDCCHs, extracts the sixth complex symbol sequence from the fifth complex symbol sequence, and performs blind detection based on the sixth complex symbol sequence to obtain the PDCCH of the network-side device. The network-side device uses DFT-s-OFDM waveform to transmit the PDCCH, which can obtain a lower peak-to-average power ratio (PAPR), improve the power amplifier efficiency of the PA, and thus ensure the power of the output signal.

[0310] Optionally, the target time-frequency resource is a time-frequency resource of the configuration search space or the control resource set CORESET.

[0311] Optionally, the processor 1010 is specifically used for:

[0312] The position index of the fifth complex number symbol sequence is divided into X3 first position index groups;

[0313] Based on the K candidate PDCCHs, K first position index groups are determined from the X3 first position index groups; each of the K first position index groups includes X2 first position index groups.

[0314] The K groups of first position indexes are determined as the position sequence of the K candidate PDCCHs;

[0315] Wherein, X2 and X3 are integers greater than 0, and X3 is greater than or equal to X2.

[0316] Optionally, the processor 1010 is specifically used for:

[0317] The position index of the fifth complex number symbol sequence is divided into X1 second position index groups;

[0318] The X1 second position index groups are divided into the X3 first position index groups;

[0319] Wherein, X1 is greater than or equal to X3.

[0320] In the above implementation, by dividing the position index of the fifth complex symbol sequence into X1 second position index groups, it is equivalent to dividing REG in the time domain; further, dividing the X1 second position index groups into X3 first position index groups is equivalent to dividing CCE in the time domain. Then, based on the K candidate PDCCHs, K first position index groups are determined from the X3 first position index groups, thus realizing the determination of the position sequence of K candidate PDCCHs, and extracting the sixth complex symbol sequence from the fifth complex symbol sequence based on the position sequence of K candidate PDCCHs, with low implementation complexity.

[0321] Optionally, the processor 1010 is specifically used for:

[0322] Within each OFDM symbol range occupied by the search space or CORESET, the position index of the fifth complex symbol sequence is continuously divided into X1' groups of the second position index; or,

[0323] Within each OFDM symbol range occupied by the search space or CORESET, the position index of the fifth complex symbol sequence is divided into X1' second position index groups in a uniformly distributed manner;

[0324] Wherein, the X1 second position index groups are obtained from the X1' second position index groups corresponding to the range of each OFDM symbol among the multiple OFDM symbols occupied by the search space or CORESET.

[0325] Optionally, the processor 1010 is specifically used for:

[0326] The position sequence of K candidate PDCCHs is determined by a deinterleaver;

[0327] The sixth complex symbol sequence is extracted from the fifth complex symbol sequence by a deinterleaver based on the position sequence of the K candidate PDCCHs.

[0328] Optionally, the processor 1010 is specifically used for:

[0329] The X1 second position index groups are numbered;

[0330] Based on the numbering of the second position index group, the X1 second position index groups are divided into the X3 first position index groups.

[0331] Optionally, the processor 1010 is specifically used for:

[0332] Within the search space or the range of multiple OFDM symbols occupied by CORESET, the second position index group is numbered according to the OFDM symbol priority.

[0333] Within each OFDM symbol range occupied by the search space or CORESET, the second location index groups are numbered according to the order of the minimum or maximum value of the location index contained in each second location index group.

[0334] In the above implementation, within the search space or the range of multiple OFDM symbols occupied by CORESET, the second position index groups are numbered according to the priority of OFDM symbols; within each OFDM symbol range occupied by CORESET, the second position index groups are numbered according to the order of the minimum or maximum value of the position index contained in each second position index group, which has low implementation complexity.

[0335] Optionally, based on the K candidate PDCCHs, K first position index groups are determined from the X3 first position index groups, which are related to at least one of the following:

[0336] M1, X2, X3, the number K of candidate PDCCHs associated with M1 or X2, the cell index, and the radio network temporary identifier RNTI; wherein, M1 is the length of the sixth complex symbol sequence.

[0337] Optionally, the processor 1010 is specifically configured to: when the search space or CORESET occupies multiple OFDM symbols, the terminal starts from the first OFDM symbol occupied by the search space or CORESET, and performs IDFT or inverse transformation precoding operation on the fourth complex symbol sequence symbol by symbol by symbol to obtain the fifth complex symbol sequence.

[0338] Optionally, the length of the fifth complex symbol sequence is related to at least one of the following:

[0339] The time domain length of the target time-frequency resource;

[0340] The frequency domain length of the target time-frequency resource;

[0341] The number of subcarriers contained in a Physical Resource Block (PRB);

[0342] The target time-frequency resources are the time-frequency resources used for transmitting reference signals.

[0343] Optionally, the length of the fifth complex symbol sequence is any one of the following:

[0344]

[0345]

[0346] Where, N f This indicates the number of resource blocks (RBs) occupied by the search space or CORESET. L1 represents the number of subcarriers contained in each RB, L1 represents the number of OFDM symbols occupied by the search space or CORESET, and Nr represents the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space or CORESET.

[0347] Optionally, the processor 1010 is further configured to: identify the precoding granularity as X5 consecutive PRBs in the frequency domain; X5 is an integer greater than 0.

[0348] Optionally, at least one of the following is configured by the network-side device or predefined by the protocol:

[0349] The size of the first position index group, the size of the second position index group, and X1, X2, X3, and K.

[0350] Optionally, X5 is configured for network-side devices or predefined by protocols.

[0351] This application also provides a network-side device, including a processor and a communication interface. The processor performs DFT or transform precoding on a first complex symbol sequence to obtain a second complex symbol sequence. The target position of the first complex symbol sequence includes a third complex symbol sequence, the length of which is less than or equal to the length of the first complex symbol sequence. The third complex symbol sequence carries PDCCH transmission data and maps the second complex symbol sequence onto a target time-frequency resource. The communication interface is used to send the second complex symbol sequence mapped onto the target time-frequency resource. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0352] Specifically, embodiments of this application also provide a network-side device. For example... Figure 18 As shown, the network-side device 700 includes: an antenna 71, a radio frequency (RF) device 72, a baseband device 73, a processor 75, and a memory 75. The antenna 71 is connected to the RF device 72. In the uplink direction, the RF device 72 receives information through the antenna 71 and transmits the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes the information to be transmitted and sends it to the RF device 72. The RF device 72 processes the received information and transmits it through the antenna 71.

[0353] The aforementioned frequency band processing device can be located in the baseband device 73. The method executed by the network-side device in the above embodiments can be implemented in the baseband device 73, which includes a baseband processor 75 and a memory 75.

[0354] The baseband device 73 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 18 As shown, one of the chips is, for example, a baseband processor 75, which is connected to a memory 75 via a bus interface to call the program in the memory 75 and execute the network device operations shown in the above method embodiment.

[0355] The baseband device 73 network-side equipment may also include a network interface 76 for exchanging information with the radio frequency device 72, such as a common public radio interface (CPRI).

[0356] Specifically, the network-side device 700 of this embodiment further includes: instructions or programs stored in a memory 75 and executable on a processor 75, wherein the processor 75 calls the instructions or programs in the memory 75 to execute. Figure 14 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0357] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described PDCCH transmission method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0358] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0359] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described PDCCH transmission method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0360] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0361] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described PDCCH transmission method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0362] This application also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the PDCCH transmission method as described above, and the network-side device can be used to perform the steps of the PDCCH transmission method as described above.

[0363] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0364] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0365] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for transmitting a Physical Downlink Control Channel (PDCCH), characterized in that, include: The network-side device determines the target position of the first complex symbol sequence within the second complex symbol sequence, and places the first complex symbol sequence at the target position within the second complex symbol sequence; the first complex symbol sequence is used to carry PDCCH data; The network-side device performs DFT or transformation precoding on the second complex symbol sequence to obtain a third complex symbol sequence; The network-side device maps the third complex symbol sequence onto the target time-frequency resource and sends it; The target position is the position corresponding to the position sequence of the target PDCCH among K candidate PDCCHs; where K is an integer greater than 0. The network-side device determines the target position of the first complex symbol sequence within the second complex symbol sequence, and places the first complex symbol sequence at the target position within the second complex symbol sequence, including: The network-side device determines the target position of the first complex symbol sequence in the second complex symbol sequence through an interleaver, and places the first complex symbol sequence at the target position in the second complex symbol sequence.

2. The PDCCH transmission method according to claim 1, characterized in that, The target time-frequency resource is the time-frequency resource of the configuration search space or control resource set CORESET.

3. The PDCCH transmission method according to claim 2, characterized in that, The network-side device determines the location corresponding to the location sequence of the target PDCCH, including: The network-side device divides the position index of the second complex symbol sequence into X3 first position index groups; The network-side device maps the location sequence of the target PDCCH to the X2 first location index groups in the X3 first location index groups; The network-side device uses the positions corresponding to the X2 first position index groups as the target positions; Wherein, X2 and X3 are integers greater than 0, and X3 is greater than or equal to X2.

4. The PDCCH transmission method according to claim 3, characterized in that, The network-side device divides the position index of the second complex symbol sequence into X3 first position index groups, including: The network-side device divides the position index of the second complex symbol sequence into X1 second position index groups; The network-side device divides the X1 second location index groups into the X3 first location index groups; Wherein, X1 is greater than or equal to X3.

5. The PDCCH transmission method according to claim 4, characterized in that, The network-side device divides the position index of the second complex symbol sequence into X1 second position index groups, including: The network-side device, within each OFDM symbol range occupied by the search space or CORESET, continuously divides the position index of the second complex symbol sequence into X1' groups of the second position index; or, The network-side device divides the position index of the second complex symbol sequence into X1' second position index groups in a uniformly distributed manner within each OFDM symbol range occupied by the search space or CORESET. Wherein, the X1 second position index groups are obtained from the X1' second position index groups corresponding to the range of each OFDM symbol among the multiple OFDM symbols occupied by the search space or CORESET.

6. The PDCCH transmission method according to claim 4 or 5, characterized in that, The network-side device divides the X1 second location index groups into the X3 first location index groups, including: The network-side device assigns numbers to the X1 second location index groups; The network-side device divides the X1 second location index groups into the X3 first location index groups based on the number of the second location index group.

7. The PDCCH transmission method according to any one of claims 3-5, characterized in that, The network-side device maps the location sequence of the target PDCCH to the X2 first location index groups in the X3 first location index groups, including: The network-side device maps the position sequence of the target PDCCH to the X2 first position index groups in the X3 first position index groups based on the index of the target PDCCH in the K candidate PDCCHs.

8. The PDCCH transmission method according to claim 6, characterized in that, The network-side device numbers the X1 second location index groups, including: The network-side device numbers the second location index group according to OFDM symbol priority within the search space or the range of multiple OFDM symbols occupied by CORESET; The network-side device numbers the second location index groups according to the minimum or maximum value of the location indexes contained in each second location index group within the search space or CORESET area of ​​each OFDM symbol.

9. The PDCCH transmission method according to any one of claims 3-5, characterized in that, Mapping the position sequence of the target PDCCH to the X2 first position index groups among the X3 first position index groups is related to at least one of the following: M1, X2, X3, the number K of candidate PDCCHs associated with M1 or X2, the cell index, and the radio network temporary identifier RNTI; wherein, M1 is the length of the first complex symbol sequence.

10. The PDCCH transmission method according to any one of claims 1-5, characterized in that, The length of the second complex symbol sequence is related to at least one of the following: The time domain length of the target time-frequency resource; The frequency domain length of the target time-frequency resource; The number of subcarriers contained in a Physical Resource Block (PRB); The target time-frequency resources are the time-frequency resources used for transmitting reference signals.

11. The PDCCH transmission method according to claim 10, characterized in that, The length of the second complex symbol sequence is any one of the following: N f L1; N f L1- No.; Where, N f This indicates the number of resource blocks (RBs) occupied by the search space or CORESET. L1 represents the number of subcarriers contained in each RB, L1 represents the number of OFDM symbols occupied by the search space or CORESET, and Nr represents the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space or CORESET.

12. The PDCCH transmission method according to any one of claims 1-5, characterized in that, The method further includes: The network-side device performs beamforming precoding on the target time-frequency resources with a precoding granularity of X4 RBs; where X4 is an integer greater than 0; and the same precoding vector is used within the X4 RBs.

13. The PDCCH transmission method according to any one of claims 1-5, characterized in that, The network-side device performs DFT or transform precoding on the second complex symbol sequence to obtain a third complex symbol sequence, including: When the search space or CORESET occupies multiple OFDM symbols, the network-side device starts from the first OFDM symbol occupied by the search space or CORESET and performs DFT or transformation precoding on the second complex symbol sequence symbol by symbol by symbol to obtain the third complex symbol sequence.

14. The PDCCH transmission method according to claim 4, characterized in that, At least one of the following is configured by the network-side device or predefined by the protocol: The size of the first position index group, the size of the second position index group, and X1, X2, X3, and K.

15. The PDCCH transmission method according to claim 12, characterized in that, X4 refers to network-side device configuration or protocol predefined configuration.

16. A method for transmitting a Physical Downlink Control Channel (PDCCH), characterized in that, include: The terminal receives the fourth complex symbol sequence on the target time-frequency resource and performs an inverse discrete Fourier transform (IDFT) or an inverse conversion precoding operation on the fourth complex symbol sequence to obtain the fifth complex symbol sequence. The terminal determines the position sequence of K candidate PDCCHs; where K is an integer greater than 0. The terminal extracts the sixth complex symbol sequence from the fifth complex symbol sequence based on the position sequence of the K candidate PDCCHs; The terminal performs blind detection based on the sixth complex number symbol sequence; The terminal determines the position sequence of K candidate PDCCHs, including: The terminal determines the position sequence of K candidate PDCCHs using a deinterleaver. The terminal extracts a sixth complex symbol sequence from the fifth complex symbol sequence based on the position sequences of the K candidate PDCCHs, including: The terminal extracts the sixth complex symbol sequence from the fifth complex symbol sequence using a deinterleaver based on the position sequence of the K candidate PDCCHs.

17. The PDCCH transmission method according to claim 16, characterized in that, The target time-frequency resource is the time-frequency resource of the configuration search space or control resource set CORESET.

18. The PDCCH transmission method according to claim 16 or 17, characterized in that, The terminal determines the position sequence of K candidate PDCCHs, including: The terminal divides the position index of the fifth complex number symbol sequence into X3 first position index groups; Based on the K candidate PDCCHs, the terminal determines K first position index groups from the X3 first position index groups; each of the K first position index groups includes X2 first position index groups. The terminal determines the K groups of first location indexes as the location sequence of the K candidate PDCCHs; Wherein, X2 and X3 are integers greater than 0, and X3 is greater than or equal to X2.

19. The PDCCH transmission method according to claim 18, characterized in that, The terminal divides the position index of the fifth complex number symbol sequence into X3 first position index groups, including: The terminal divides the position index of the fifth complex number symbol sequence into X1 second position index groups; The terminal divides the X1 second position index groups into the X3 first position index groups; Wherein, X1 is greater than or equal to X3.

20. The PDCCH transmission method according to claim 19, characterized in that, The terminal divides the position index of the fifth complex number symbol sequence into X1 second position index groups, including: The terminal, within the search space or each OFDM symbol range occupied by CORESET, continuously divides the position index of the fifth complex symbol sequence into X1' groups of the second position index; or, The terminal divides the position index of the fifth complex symbol sequence into X1' second position index groups in a uniformly distributed manner within each OFDM symbol range occupied by the search space or CORESET. Wherein, the X1 second position index groups are obtained from the X1' second position index groups corresponding to the range of each OFDM symbol among the multiple OFDM symbols occupied by the search space or CORESET.

21. The PDCCH transmission method according to claim 19, characterized in that, The terminal divides the X1 second position index groups into the X3 first position index groups, including: The terminal numbers the X1 second location index groups; The terminal divides the X1 second location index groups into the X3 first location index groups based on the number of the second location index group.

22. The PDCCH transmission method according to claim 21, characterized in that, The terminal numbers the X1 second location index groups, including: The terminal numbers the second position index group in the search space or within the range of multiple OFDM symbols occupied by CORESET, according to the OFDM symbol priority. The terminal numbers the second location index groups according to the order of the minimum or maximum value of the location indexes contained in each second location index group within the search space or each OFDM symbol range occupied by CORESET.

23. The PDCCH transmission method according to claim 18, characterized in that, Based on the K candidate PDCCHs, the terminal determines K first position index groups from the X3 first position index groups, which are related to at least one of the following: M1, X2, X3, the number K of candidate PDCCHs associated with M1 or X2, the cell index, and the radio network temporary identifier RNTI; wherein, M1 is the length of the sixth complex symbol sequence.

24. The PDCCH transmission method according to claim 16 or 17, characterized in that, The length of the fifth complex number symbol sequence is related to at least one of the following: The time domain length of the target time-frequency resource; The frequency domain length of the target time-frequency resource; The number of subcarriers contained in a Physical Resource Block (PRB); The target time-frequency resources are the time-frequency resources used for transmitting reference signals.

25. The PDCCH transmission method according to claim 24, characterized in that, The length of the fifth complex number symbol sequence is any one of the following: N f L1; N f L1- No.; Where, N f This indicates the number of resource blocks (RBs) occupied by the search space or CORESET. L1 represents the number of subcarriers contained in each RB, L1 represents the number of OFDM symbols occupied by the search space or CORESET, and Nr represents the number of resource units (REs) used for transmitting reference signals within the time-frequency resources occupied by the search space or CORESET.

26. The PDCCH transmission method according to claim 16 or 17, characterized in that, The method further includes: The terminal can identify the precoding granularity as X5 consecutive PRBs in the frequency domain; X5 is an integer greater than 0.

27. The PDCCH transmission method according to claim 16 or 17, characterized in that, The step of performing an inverse discrete Fourier transform (IDFT) or a transform precoding inverse operation on the fourth complex symbol sequence to obtain the fifth complex symbol sequence includes: When the search space or CORESET occupies multiple OFDM symbols, the terminal starts from the first OFDM symbol occupied by the search space or CORESET and performs IDFT or inverse transformation precoding operation on the fourth complex symbol sequence symbol by symbol by symbol to obtain the fifth complex symbol sequence.

28. The PDCCH transmission method according to claim 19, characterized in that, At least one of the following is configured by the network-side device or predefined by the protocol: The size of the first position index group, the size of the second position index group, and X1, X2, X3, and K.

29. The PDCCH transmission method according to claim 26, characterized in that, X5 refers to network-side device configuration or protocol predefined configuration.

30. A Physical Downlink Control Channel (PDCCH) transmission apparatus, characterized in that, include: The processing module is configured to determine the target position of the first complex symbol sequence in the second complex symbol sequence, and place the first complex symbol sequence at the target position in the second complex symbol sequence; the first complex symbol sequence is used to carry PDCCH data; Perform DFT or transformation precoding on the second complex symbol sequence to obtain the third complex symbol sequence; The transmitting module is used to map the third complex symbol sequence onto the target time-frequency resource and transmit it; Wherein, the target position is the position corresponding to the position sequence of the target PDCCH among K candidate PDCCHs; and K is an integer greater than 0. The processing module is further configured to determine the target position of the first complex symbol sequence in the second complex symbol sequence through an interleaver, and place the first complex symbol sequence at the target position in the second complex symbol sequence.

31. A Physical Downlink Control Channel (PDCCH) transmission apparatus, characterized in that, include: The receiving module is used to receive the fourth complex symbol sequence on the target time-frequency resource; The processing module is used to perform the Inverse Discrete Fourier Transform (IDFT) or the inverse transformation precoding operation on the fourth complex symbol sequence to obtain the fifth complex symbol sequence. The processing module is further configured to determine the position sequence of K candidate PDCCHs; where K is an integer greater than 0. Based on the position sequences of the K candidate PDCCHs, the sixth complex symbol sequence is extracted from the fifth complex symbol sequence; Blind detection is performed based on the sixth complex number symbol sequence; The processing module is further configured to use a deinterleaver to determine the position sequence of K candidate PDCCHs, and to use the deinterleaver to extract the sixth complex symbol sequence from the fifth complex symbol sequence based on the position sequence of the K candidate PDCCHs.

32. A network-side device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the PDCCH transmission method as described in any one of claims 1 to 15.

33. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the PDCCH transmission method as described in any one of claims 16 to 29.

34. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the PDCCH transmission method as described in any one of claims 1-15, or implement the steps of the PDCCH transmission method as described in any one of claims 16-29.

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