Downlink control channel transmission method and device, terminal and access network equipment

Abstract

The invention relates to a downlink control channel transmission method and device, a terminal and access network equipment, and belongs to the technical field of communication. The method comprises the following steps: repeatedly receiving a downlink control channel on at least one transmission unit in a transmission period of the downlink control channel, wherein each transmission unit is used for continuously and repeatedly transmitting the downlink control channel for at least two times. The invention relates to a divisional application of which the application number is 202080000485.8.

Description

[0001] This application is a divisional application of the Chinese application with application number 202080000485.8, application date March 6, 2020, and invention name “Downlink control channel transmission method, device, terminal and access network equipment”. Technical Field

[0002] The present disclosure relates to the field of communication technology, and in particular to a downlink control channel transmission method, device, terminal and access network equipment. Background Art

[0003] In a communication system, a downlink control channel (Physical Downlink Control Channel, PDCCH) is used to carry scheduling and other control information, such as transmission format, resource allocation, uplink scheduling permission, power control and uplink retransmission information.

[0004] In the 5G New Radio (NR) system, coverage enhancement can be achieved by repeatedly transmitting PDCCH between access network equipment and terminals. Summary of the invention

[0005] The embodiments of the present disclosure provide a downlink control channel transmission method, device, terminal and access network equipment, so that the terminal can save transmission time and reduce power consumption; reduce the difference of repeated transmission channels, and facilitate demodulation processing. The technical solution is as follows:

[0006] According to one aspect of an embodiment of the present disclosure, a downlink control channel transmission method is provided, the method comprising:

[0007] The downlink control channel is repeatedly received on at least one transmission unit in a transmission period of the downlink control channel, and each of the transmission units is used for continuously and repeatedly transmitting the downlink control channel at least twice.

[0008] In at least one implementation of the embodiment of the present disclosure, the repeatedly receiving the downlink control channel on at least one transmission unit in the transmission period of the downlink control channel includes:

[0009] Determine a repetition number set, the repetition number set including a plurality of repetition numbers of different sizes, and the number of times the downlink control channel is repeatedly transmitted on the at least one transmission unit is one of the repetition number sets;

[0010] In each transmission cycle, the multiple repetition times are sequentially used to repeatedly receive the downlink control channel starting from the start transmission time until the downlink control channel is correctly demodulated or all the repetition times in the repetition time set are traversed.

[0011] In at least one implementation of the embodiments of the present disclosure, when the number of the transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the method further includes:

[0012] The length of the transmission unit and the length of the interval are determined.

[0013] In at least one implementation of the embodiments of the present disclosure, determining the length of the transmission unit includes:

[0014] Acquire a configuration signaling sent by an access network device, where the configuration signaling includes the length of the transmission unit;

[0015] Alternatively, obtaining the length of the transmission unit configured in the protocol;

[0016] Alternatively, the length of the transmission unit is determined based on a relationship between a maximum number of repetitions and a threshold value, wherein the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle;

[0017] Alternatively, the length of the transmission unit is determined based on the number of repetitions used in the current transmission.

[0018] In at least one implementation of the embodiments of the present disclosure, determining the interval length includes:

[0019] Acquire a configuration signaling sent by an access network device, where the configuration signaling includes the interval length;

[0020] Alternatively, obtaining the interval length configured in the protocol;

[0021] Alternatively, the interval length is determined based on the length of the transmission unit;

[0022] Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle.

[0023] In at least one implementation of the embodiments of the present disclosure, the method further includes:

[0024] Determine the length of the transmission cycle;

[0025] The downlink control channel is received periodically according to the length of the transmission period.

[0026] In at least one implementation of the embodiments of the present disclosure, determining the length of the transmission period includes:

[0027] Determining the length of the transmission cycle based on at least one of the length of the transmission unit, the interval length, and a maximum number of repetitions;

[0028] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0029] In at least one implementation of the embodiments of the present disclosure, the method further includes:

[0030] Determine the start transmission time;

[0031] In each transmission cycle, the downlink control channel is received starting from the start transmission time.

[0032] In at least one implementation of the embodiments of the present disclosure, determining the start transmission time includes:

[0033] Determining the start transmission time based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions;

[0034] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0035] In at least one implementation of the embodiments of the present disclosure, determining a set of repetition times includes:

[0036] Obtain a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of a downlink control channel in each transmission cycle;

[0037] Based on the maximum number of repetitions, the repetition number set is determined, and the maximum value in the repetition number set is the maximum number of repetitions.

[0038] In at least one implementation of the embodiments of the present disclosure, obtaining the maximum number of repetitions includes:

[0039] A radio resource control signaling is received, where the radio resource control signaling includes the maximum number of repetitions.

[0040] According to one aspect of an embodiment of the present disclosure, a downlink control channel transmission method is provided, the method comprising:

[0041] The downlink control channel is repeatedly sent on at least one transmission unit in each transmission cycle of the downlink control channel, and each of the transmission units is used for continuously transmitting the downlink control channel at least twice.

[0042] In at least one implementation of the embodiment of the present disclosure, the repeatedly sending the downlink control channel on at least one transmission unit in each transmission period of the downlink control channel includes:

[0043] Obtaining the channel status information of the terminal;

[0044] Determining the number of repetitions based on channel status information of the terminal;

[0045] The downlink control channel is repeatedly sent according to the repetition number, and the number of times the downlink control channel is repeatedly transmitted on the at least one transmission unit is the repetition number.

[0046] In at least one implementation of the embodiments of the present disclosure, when the number of the transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the method further includes:

[0047] The length of the transmission unit and the length of the interval are determined.

[0048] In at least one implementation of the embodiments of the present disclosure, determining the length of the transmission unit includes:

[0049] Obtaining the length of the transmission unit configured in the protocol;

[0050] Alternatively, the length of the transmission unit is determined based on a relationship between a maximum number of repetitions and a threshold value, wherein the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle;

[0051] Alternatively, the length of the transmission unit is determined based on the number of repetitions used in the current transmission.

[0052] In at least one implementation of the embodiments of the present disclosure, determining the interval length includes:

[0053] Obtaining the interval length configured in the protocol;

[0054] Alternatively, the interval length is determined based on the length of the transmission unit;

[0055] Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle.

[0056] In at least one implementation of the embodiments of the present disclosure, the method further includes:

[0057] At least one of the length of the transmission unit and the interval length is sent using configuration signaling.

[0058] In at least one implementation of the embodiments of the present disclosure, the method further includes:

[0059] Determine the length of the transmission cycle;

[0060] The downlink control channel is sent periodically according to the length of the transmission period.

[0061] In at least one implementation of the embodiments of the present disclosure, determining the length of the transmission period includes:

[0062] Determining the length of the transmission cycle based on at least one of the length of the transmission unit, the interval length, and a maximum number of repetitions;

[0063] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0064] In at least one implementation of the embodiments of the present disclosure, the method further includes:

[0065] Determine the start transmission time;

[0066] In each transmission cycle, the downlink control channel is sent starting from the start transmission time.

[0067] In at least one implementation of the embodiments of the present disclosure, determining the start transmission time includes:

[0068] Determining the start transmission time based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions;

[0069] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0070] In at least one implementation of the embodiments of the present disclosure, the method further includes:

[0071] A radio resource control signaling is sent, wherein the radio resource control signaling includes a maximum number of repetitions, and the maximum number of repetitions is the maximum number of repetitions of a downlink control channel in each transmission cycle.

[0072] According to one aspect of an embodiment of the present disclosure, a downlink control channel transmission device is provided, the device comprising:

[0073] The receiving module is configured to repeatedly receive the downlink control channel on at least one transmission unit in a transmission period of the downlink control channel, and each of the transmission units is used to repeatedly transmit the downlink control channel at least twice in succession.

[0074] According to one aspect of an embodiment of the present disclosure, a downlink control channel transmission device is provided, the device comprising:

[0075] The sending module is configured to repeatedly send the downlink control channel on at least one transmission unit in each transmission period of the downlink control channel, and each of the transmission units is used to continuously transmit the downlink control channel at least twice.

[0076] According to another aspect of an embodiment of the present disclosure, a terminal is provided, comprising: a processor; and a memory for storing processor executable instructions; wherein the processor is configured to load and execute the executable instructions to implement the aforementioned downlink control channel transmission method.

[0077] According to another aspect of an embodiment of the present disclosure, an access network device is provided, the access network device comprising: a processor; a memory for storing processor executable instructions; wherein the processor is configured to load and execute the executable instructions to implement the aforementioned downlink control channel transmission method.

[0078] According to another aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided. When instructions in the computer-readable storage medium are executed by a processor, the downlink control channel transmission method as described above can be executed.

[0079] In the embodiment of the present disclosure, by repeatedly transmitting the downlink control channel in each transmission cycle, the downlink control channel is carried on at least one transmission unit, and each transmission unit is used to continuously and repeatedly transmit the downlink control channel at least twice. In this way, at least part of the downlink control channel is transmitted continuously, avoiding the situation in the related art where the downlink control channel is arranged in a dispersed manner, saving transmission time and reducing power consumption. At the same time, by shortening the transmission time, the difference in the repeatedly transmitted channels is reduced, which facilitates the demodulation processing of the terminal.

[0080] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0082] Figure 1 is a schematic diagram of a network architecture provided by an embodiment of the present disclosure;

[0083] Figure 2 is a transmission position schematic diagram provided by an embodiment of the present disclosure;

[0084] Figure 3 is a flow chart of a downlink control channel transmission method according to an exemplary embodiment;

[0085] Figure 4 is a flow chart of a downlink control channel transmission method according to an exemplary embodiment;

[0086] Figure 5 is a flow chart of a downlink control channel transmission method according to an exemplary embodiment;

[0087] Figure 6 is a transmission position schematic diagram provided by an embodiment of the present disclosure;

[0088] Figure 7is a flow chart of a downlink control channel transmission method according to an exemplary embodiment;

[0089] Figure 8 is a transmission position schematic diagram provided by an embodiment of the present disclosure;

[0090] Fig. 9 is a structural schematic diagram of a downlink control channel transmission device according to an exemplary embodiment;

[0091] Fig.10 is a structural schematic diagram of a downlink control channel transmission device according to an exemplary embodiment;

[0092] Fig.11 is a block diagram of a terminal according to an exemplary embodiment;

[0093] Fig.12 The invention is a block diagram of an access network device according to an exemplary embodiment. DETAILED DESCRIPTION

[0094] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0095] Figure 1 FIG. 1 is a block diagram of a communication system provided by an exemplary embodiment of the present disclosure. Figure 1 As shown, the communication system may include: an access network 12 and a terminal 13.

[0096] The access network 12 includes several access network devices 120. The access network device 120 may be a base station, which is a device deployed in the access network to provide wireless communication functions for terminals. Base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different wireless access technologies, the names of devices with base station functions may be different. In the 5G New Radio (NR) system, they are called gNodeB or gNB. With the evolution of communication technology, the name "base station" may change. For the convenience of description, the above-mentioned devices that provide wireless communication functions for terminals are collectively referred to as access network devices below.

[0097] The terminal 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile stations (MS), terminals, etc. For the convenience of description, the above-mentioned devices are collectively referred to as terminals. The access network device 120 and the terminal 13 communicate with each other through some air interface technology, such as a Uu interface.

[0098] In the NR system, in order to save power, the access network device 120 does not send a downlink control channel to the terminal 13 in every time slot. It only sends a downlink control channel (Physical Downlink Control Channel, PDCCH) to the terminal at a predetermined time. When the access network device 120 sends a downlink control channel to the terminal 13, it is usually determined by several parameters. Figure 2 To explain:

[0099] The length of the transmission cycle ( Figure 2 T in the PDCCH is used to indicate the interval between slots at which the terminal starts monitoring and transmitting the PDCCH. Figure 2 A in the middle represents a slot;

[0100] Number of slots for each transmission: When the terminal starts PDCCH monitoring, how many slots need to be monitored continuously, for example Figure 2 In the middle, there are 3;

[0101] Symbol position for transmission in a slot: There are multiple symbols in a slot, on which symbols does the terminal need to monitor the PDCCH, for example Figure 2 The middle shading corresponds to the slot for transmitting PDCCH.

[0102] It should be noted that Figure 2 A shaded rectangle represents a transmission of PDCCH, which may correspond to 1 to 3 slots, that is, in the current NR system, Figure 2 Each shaded rectangle in the figure is a transmission opportunity of a PDCCH. Different PDCCHs or the same PDCCH can be transmitted in different transmission opportunities.

[0103] The coverage enhancement effect can be achieved by repeated transmission between the access network equipment and the terminal, but this discrete configuration (any two adjacent PDCCHs use non-adjacent symbols) will prolong the terminal's reception time, which is not conducive to power saving. At the same time, due to the long transmission time, the channel conditions are likely to change, resulting in large differences in the channels transmitting the same PDCCH, which is not conducive to PDCCH demodulation.

[0104] The communication system and business scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art will appreciate that with the evolution of communication systems and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0105] Figure 3 The figure is a flow chart of a downlink control channel transmission method according to an exemplary embodiment.

[0106] See also Figure 3 , the method comprises the following steps:

[0107] In step 101, a terminal repeatedly receives a downlink control channel in at least one transmission unit in a transmission period of the downlink control channel.

[0108] Each transmission unit is used to continuously and repeatedly transmit the downlink control channel at least twice.

[0109] In the embodiment of the present disclosure, a transmission unit may include multiple slots.

[0110] In the embodiment of the present disclosure, when the downlink control channel is repeatedly transmitted in each transmission cycle, the downlink control channel is carried on at least one transmission unit, and each transmission unit is used to continuously and repeatedly transmit the downlink control channel at least twice. In this way, at least part of the downlink control channel is continuously transmitted, avoiding the situation of dispersed arrangement of the downlink control channel in the related art, saving transmission time and reducing power consumption; at the same time, by shortening the transmission time, the difference of the repeated transmission channel is reduced, which is convenient for the demodulation processing of the terminal. This makes it possible to improve the transmission performance under the condition of enhanced coverage.

[0111] Optionally, repeatedly receiving the downlink control channel on at least one transmission unit in a transmission period of the downlink control channel includes:

[0112] Determine a repetition number set, the repetition number set includes a plurality of repetition numbers of different sizes, and the number of times the downlink control channel is repeatedly transmitted on at least one transmission unit is a number in the repetition number set;

[0113] In each transmission cycle, multiple repetition times are sequentially used to repeatedly receive the downlink control channel starting from the start transmission time until the downlink control channel is correctly demodulated or all repetition times in the repetition time set are traversed.

[0114] In this implementation, the terminal selects multiple repetition times from the repetition time set and performs demodulation processing in sequence until the downlink control channel is correctly demodulated or all repetition times in the repetition time set are traversed. This solution does not require the access network device to send the actual repetition time to the terminal, saving signaling overhead and reducing system power consumption.

[0115] Optionally, when the number of transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the method further includes:

[0116] Determine the transmission unit length and interval length.

[0117] In this implementation, in a transmission cycle, if the number of transmission units is greater than 1, the terminal needs to first determine the length and interval length of the transmission unit, and then receive the downlink control channel according to the determined length and interval length of the transmission unit.

[0118] Optionally, determining the length of the transmission unit includes:

[0119] Obtaining a configuration signaling sent by an access network device, where the configuration signaling includes the length of a transmission unit;

[0120] Alternatively, obtain the length of the transmission unit configured in the protocol;

[0121] Alternatively, the length of the transmission unit is determined based on the relationship between the maximum number of repetitions and the threshold value, and the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle;

[0122] Alternatively, the length of the transmission unit is determined based on the number of repetitions used in the current transmission.

[0123] In this implementation, the length of the transmission unit may be configured to the terminal through the access network device, or may be obtained by the terminal itself from the protocol, or may be determined based on the maximum number of repetitions.

[0124] Optionally, determine the interval length, including:

[0125] Obtaining configuration signaling sent by the access network device, where the configuration signaling includes the interval length;

[0126] Alternatively, obtain the interval length configured in the protocol;

[0127] Alternatively, the interval length is determined based on the length of the transmission unit;

[0128] Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0129] In this implementation, the length of the transmission unit may be configured to the terminal through the access network device, or may be obtained by the terminal itself from the protocol, or may be determined based on the maximum number of repetitions.

[0130] Optionally, the method further comprises:

[0131] Determine the length of the transmission cycle;

[0132] The downlink control channel is received periodically according to the length of the transmission period.

[0133] In this implementation, the terminal implements periodic transmission of a downlink control channel with the access network device by determining the length of a transmission period.

[0134] Optionally, determining the length of the transmission period includes:

[0135] determining a length of a transmission period based on at least one of a length of a transmission unit, an interval length, and a maximum number of repetitions;

[0136] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0137] In this implementation, the terminal determines the length of the transmission cycle by at least one of the length interval length and the maximum number of repetitions of the transmission unit. This solution does not require the access network device to send the length of the transmission cycle to the terminal, saving signaling overhead and reducing system power consumption.

[0138] Optionally, the method further comprises:

[0139] Determine the start transmission time;

[0140] In each transmission cycle, the downlink control channel is received starting from the start transmission time.

[0141] In this implementation, the terminal achieves correct transmission of the downlink control channel between the terminal and the access network device by determining the start transmission time.

[0142] Optionally, determining a start transmission time includes:

[0143] determining a start transmission time based on at least one of a transmission unit length, an interval length, and a maximum number of repetitions;

[0144] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0145] In this implementation, the terminal determines the start transmission time by at least one of the length interval length and the maximum number of repetitions of the transmission unit. This solution does not require the access network device to send the start transmission time to the terminal, saving signaling overhead and reducing system power consumption.

[0146] Optionally, determine a set of repetition times, including:

[0147] Obtain a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of a downlink control channel in each transmission cycle;

[0148] Based on the maximum number of repetitions, a repetition number set is determined, and the maximum value in the repetition number set is the maximum number of repetitions.

[0149] In this implementation, a repetition number set can be determined by the maximum repetition number, so that the terminal can subsequently demodulate the downlink control channel based on the repetition number set.

[0150] Optionally, get the maximum number of repetitions, including:

[0151] A Radio Resource Control (RRC) signaling is received, where the RRC signaling includes a maximum number of repetitions.

[0152] In this implementation, the maximum number of repetitions is limited to be transmitted through radio resource control signaling. Since the maximum number of repetitions does not change frequently, it can usually be used as a static parameter after configuration. However, the number of repetitions actually used between the access network device and the terminal will change dynamically with the channel quality of the terminal. Therefore, only the maximum number of repetitions is transmitted through signaling, rather than the number of repetitions actually used each time, which can reduce signaling overhead.

[0153] It is worth noting that the aforementioned step 101 and the aforementioned optional steps can be combined arbitrarily.

[0154] Figure 4 The present invention is a flowchart of a downlink control channel transmission method according to an exemplary embodiment.

[0155] See also Figure 4 , the method comprises the following steps:

[0156] In step 201, the access network device repeatedly sends a downlink control channel in at least one transmission unit in each transmission period of the downlink control channel.

[0157] Each transmission unit is used to continuously and repeatedly transmit the downlink control channel at least twice.

[0158] In the embodiment of the present disclosure, a transmission unit may include multiple slots.

[0159] In the embodiment of the present disclosure, when the downlink control channel is repeatedly transmitted in each transmission cycle, the downlink control channel is carried on at least one transmission unit, and each transmission unit is used to continuously and repeatedly transmit the downlink control channel at least twice. In this way, at least part of the downlink control channel is continuously transmitted, avoiding the situation of dispersed arrangement of the downlink control channel in the related art, saving transmission time and reducing power consumption; at the same time, by shortening the transmission time, the difference of the repeated transmission channel is reduced, which is convenient for the demodulation processing of the terminal. This makes it possible to improve the transmission performance under the condition of enhanced coverage.

[0160] Optionally, repeatedly sending the downlink control channel on at least one transmission unit in each transmission period of the downlink control channel includes:

[0161] Obtaining the channel status information of the terminal;

[0162] Determining the number of repetitions based on channel status information of the terminal;

[0163] The downlink control channel is repeatedly sent according to the repetition number, and the number of times the downlink control channel is repeatedly transmitted on at least one transmission unit is the repetition number.

[0164] Optionally, when the number of transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the method further includes:

[0165] Determine the transmission unit length and interval length.

[0166] Optionally, determining the length of the transmission unit includes:

[0167] Get the length of the transmission unit configured in the protocol;

[0168] Alternatively, the length of the transmission unit is determined based on the relationship between the maximum number of repetitions and the threshold value, and the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle;

[0169] Alternatively, the length of the transmission unit is determined based on the number of repetitions used in the current transmission.

[0170] Optionally, determine the interval length, including:

[0171] Get the interval length configured in the protocol;

[0172] Alternatively, the interval length is determined based on the length of the transmission unit;

[0173] Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0174] Optionally, the method further comprises:

[0175] At least one of the length of the transmission unit and the interval length is sent using configuration signaling.

[0176] Optionally, the method further comprises:

[0177] Determine the length of the transmission cycle;

[0178] The downlink control channel is sent periodically according to the length of the transmission period.

[0179] Optionally, determining the length of the transmission period includes:

[0180] determining a length of a transmission period based on at least one of a length of a transmission unit, an interval length, and a maximum number of repetitions;

[0181] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0182] Optionally, the method further comprises:

[0183] Determine the start transmission time;

[0184] In each transmission cycle, the downlink control channel is sent starting from the start transmission time.

[0185] Optionally, determining a start transmission time includes:

[0186] determining a start transmission time based on at least one of a transmission unit length, an interval length, and a maximum number of repetitions;

[0187] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0188] Optionally, the method further comprises:

[0189] Send a radio resource control signaling, the radio resource control signaling includes a maximum number of repetitions, and the maximum number of repetitions is the maximum number of repetitions of a downlink control channel in each transmission cycle.

[0190] It is worth noting that the aforementioned step 201 and the aforementioned optional steps can be combined arbitrarily.

[0191] Figure 5 The figure is a flow chart of a downlink control channel transmission method according to an exemplary embodiment.

[0192] See also Figure 5 , the method comprises the following steps:

[0193] In step 301, the access network device sends a maximum number of repetitions to the terminal, where the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle; the terminal receives the maximum number of repetitions sent by the access network device.

[0194] In this step, the access network device can configure the maximum number of repetitions to the terminal by configuring parameters. For example, the access network device sends a radio resource control signaling to the terminal, and the radio resource control signaling includes the maximum number of repetitions; the terminal receives the radio resource control signaling sent by the access network device.

[0195] In the embodiment of the present disclosure, the maximum number of repetitions may be pre-configured in the access network device, for example, configured in the protocol.

[0196] In step 302, the access network device obtains the channel status information of the terminal.

[0197] The channel status information is used to indicate the channel quality of the terminal. Generally, the channel quality is related to the location of the terminal, for example, the channel quality when the terminal is in the center of the cell is higher than the channel quality when the terminal is at the edge of the cell. The terminal can report the channel status information to the access network device through a message.

[0198] In step 303, the access network device determines the number of repetitions based on the channel status information of the terminal.

[0199] The number of repetitions refers to the number of times the downlink control channel is repeatedly transmitted. The terminal can achieve the effect of coverage enhancement by repeatedly transmitting the downlink control channel. Therefore, the better the channel quality, the fewer the number of repetitions can be, and the worse the channel quality, the more the number of repetitions can be, that is, the channel quality is negatively correlated with the number of repetitions.

[0200] In the embodiment of the present disclosure, a repetition number set can be determined based on the maximum number of repetitions. For example, if the maximum number of repetitions is Rmax, the repetition number set can be {1 / 8Rmax, 1 / 4Rmax, 1 / 2Rmax, Rmax}. When the access network device determines the number of repetitions based on the channel status information of the terminal, it selects from the repetition number set. For example, when the channel quality is good, the repetition number can be selected as 1 / 8Rmax or 1 / 4Rmax. When the channel quality is good, the repetition number can be selected as 1 / 2Rmax or Rmax.

[0201] Of course, the repetition number set here is just an example, and in other implementations, the repetition number set may also include more or fewer values, or include different values, etc.

[0202] In step 304, the access network device determines the length of the transmission cycle and the start transmission time.

[0203] In an embodiment of the present disclosure, the access network device may determine the length of the transmission cycle based on the maximum number of repetitions. For example, the length T of the transmission cycle may be calculated based on the maximum number of repetitions Rmax, such as T=A*Rmax. Wherein, A may be specified in the access network device protocol, and A here may be a positive integer. By setting the length of the transmission cycle to A times Rmax, in such a cycle, in addition to the resources for transmitting the terminal, other gaps are also integer multiples of Rmax, so that the gaps can be fully utilized by other terminals without generating fragmented resources. Similarly, the access network device may configure the parameter A to the terminal by configuring the parameter, so that the terminal can calculate the length T of the transmission cycle in the same way.

[0204] In the embodiment of the present disclosure, the access network device may determine the start transmission time based on the maximum number of repetitions. For example, the start transmission time X may be calculated based on the maximum number of repetitions Rmax, such as X mod (A*Rmax) = a. Wherein a may be specified in the access network device protocol. Similarly, the access network device may configure the parameter a to the terminal by configuring the parameter, so that the terminal may calculate the start transmission time X in the same manner.

[0205] The calculated start transmission time X here may be a subframe, a time slot or a symbol. For example, the calculated time slot is the Xth time slot. In this case, the position of the subframe and the symbol may be determined by a predetermined value or other means. The position determined by a predetermined value or other means may be sent by the access network device to the terminal through signaling, such as radio resource control signaling.

[0206] In step 305, the terminal determines a repetition number set, where the repetition number set includes a plurality of repetition numbers of different sizes.

[0207] As before, the repetition number set may be {1 / 8Rmax, 1 / 4Rmax, 1 / 2Rmax, Rmax}. After receiving Rmax sent by the access network device, the terminal may obtain each value of the repetition number set.

[0208] In step 306, the terminal determines the length of the transmission cycle and the start transmission time.

[0209] In this implementation, the terminal determines the length of the transmission cycle and the start transmission time to be the same as those of the access network device. The terminal uses the method determined by itself instead of the method sent by the access network device, which can save signaling overhead and reduce system power consumption.

[0210] In the process of the terminal determining the length of the transmission cycle and the start transmission time, the parameter A and the parameter a can be obtained from the protocol, or can be configured to the terminal by the access network device together with the maximum number of repetitions Rmax.

[0211] In step 307, the access network device determines the starting position of each transmission cycle according to the start transmission time and the length of the transmission cycle, and repeatedly sends the downlink control channel according to the repetition number in each transmission cycle.

[0212] In this implementation, each cycle includes one transmission unit, and the number of times the transmission unit repeatedly transmits the downlink control channel is the number of repetitions. Alternatively, each cycle includes more than two transmission units, which are continuous in the time domain, and the number of times the two or more transmission units repeatedly transmit the downlink control channel is the number of repetitions.

[0213] Figure 6 is a schematic diagram of the transmission position provided by the embodiment of the present disclosure. Figure 6 , in each transmission cycle T, the resources used to transmit the downlink control channel are continuous, and these resources constitute a transmission unit B, which is the shaded rectangle in the figure. Each shaded rectangle represents a transmission of the downlink control channel. In this case, the access network device can determine the length of the transmission unit. Of course, the access network device can also determine the length of the transmission unit based on the number of repetitions in the current transmission cycle. For example, the length of the transmission unit can be set to the actual number of repetitions determined for the current transmission. That is, in a certain transmission, the actual number of repetitions determined is X, then the length of the transmission unit can be set to X.

[0214] In other embodiments, Figure 6 The resources corresponding to B may also include more than two consecutive transmission units.

[0215] Step 308: The terminal determines the starting position of each transmission cycle according to the starting transmission time and the length of the transmission cycle, and in each transmission cycle, sequentially uses multiple repetition times to repeatedly receive the downlink control channel until the downlink control channel is correctly demodulated or all repetition times in the repetition time set are traversed.

[0216] Exemplarily, the terminal may sequentially select values ​​from the repetition number set {1 / 8Rmax, 1 / 4Rmax, 1 / 2Rmax, Rmax} for repeated reception and demodulation. For example, within a transmission period, the downlink control channel is repeatedly received starting from the start transmission time, and then demodulated according to the number of repetitions in the set in a small to large manner until the downlink control channel is correctly demodulated or all the repetitions in the set are traversed. Of course, in addition to the small to large method, the value selection method may also be from large to small, or in random order.

[0217] In this implementation, the number of repetitions is determined by the terminal itself instead of being sent by the access network device, which can save signaling overhead and reduce system power consumption.

[0218] Figure 5 In the method flow shown, each transmission cycle includes only one transmission unit or includes more than two consecutive transmission units. Figure 6 The case where each transmission cycle includes more than two transmission units arranged at intervals is described, wherein the interval lengths between any adjacent transmission units are the same.

[0219] Figure 7 The figure is a flow chart of a downlink control channel transmission method according to an exemplary embodiment.

[0220] See also Figure 7 , the method comprises the following steps:

[0221] In step 401, the access network device sends a maximum number of repetitions to the terminal, where the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle; the terminal receives the maximum number of repetitions sent by the access network device.

[0222] The detailed process of this step is the same as that of step 301 .

[0223] In step 402, the access network device obtains the channel status information of the terminal.

[0224] The detailed process of this step is the same as that of step 302 .

[0225] In step 403, the access network device determines the number of repetitions based on the channel status information of the terminal.

[0226] The detailed process of this step is the same as step 303.

[0227] In step 404, the access network device determines the length of the transmission unit and the interval length.

[0228] In the embodiment of the present disclosure, the access network device may obtain the length of the transmission unit configured in the protocol;

[0229] Alternatively, the length of the transmission unit is determined based on the relationship between the maximum number of repetitions and the threshold value, and the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle;

[0230] Exemplarily, the length of the transmission unit may be determined based on the following Table 1:

[0231] Table 1

[0232] Maximum number of repetitions Length of transmission unit >M 8 <＝M 4

[0233] Here, M may be specified in the access network device protocol. Similarly, the access network device may configure the parameter M to the terminal by configuring parameters, so that the terminal may determine the length of the transmission unit in the same manner.

[0234] Of course, Table 1 is only an example, and in practice the maximum number of repetitions may be divided into more levels to correspond to more transmission unit lengths.

[0235] Alternatively, the length of the transmission unit is determined based on the number of repetitions used for the current transmission.

[0236] For example, the access network device selects a suitable length of the transmission unit based on the number of repetitions. For example, the number of transmission units is a set value, and the length of the transmission unit can be determined based on the number of repetitions and the set value.

[0237] In the embodiment of the present disclosure, the access network device may obtain the interval length configured in the protocol;

[0238] Alternatively, the interval length is determined based on the length of the transmission unit;

[0239] Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0240] Exemplarily, there may be a corresponding relationship between the interval length and the length of the transmission unit, or there may be a corresponding relationship between the interval length and the maximum number of repetitions. The corresponding relationship may be specified in the access network device protocol. Similarly, the access network device may configure the above corresponding relationship to the terminal, so that the terminal can determine the interval length in the same way.

[0241] In step 405, the access network device determines the length of the transmission cycle and the start transmission time.

[0242] In an implementation manner of the embodiment of the present disclosure, the access network device may determine the length of the transmission cycle and the start transmission time in the same manner as step 304 .

[0243] In another implementation of the embodiment of the present disclosure, the access network device may also determine the length of the transmission cycle based on the length of the transmission unit, or determine the length of the transmission cycle based on the interval length, or determine the length of the transmission cycle based on two of the maximum number of repetitions, the length of the transmission unit and the interval length.

[0244] Similarly, the access network device may also determine the start transmission time based on the length of the transmission unit, or determine the start transmission time based on the interval length, or determine the start transmission time based on two of the maximum number of repetitions, the length of the transmission unit and the interval length.

[0245] Here, the length of the transmission cycle and the start transmission time can be determined by using a predefined correspondence relationship. For example, the correspondence relationship between the length of the transmission cycle and the maximum number of repetitions and the length of the transmission unit is predefined, and after the maximum number of repetitions and the length of the transmission unit are determined, the length of the transmission cycle can be obtained based on the correspondence relationship.

[0246] In step 406, the terminal determines a repetition number set, where the repetition number set includes a plurality of repetition numbers of different sizes.

[0247] The detailed process of this step is the same as that of step 305 .

[0248] In step 407, the terminal determines the length of the transmission unit and the length of the interval.

[0249] In an implementation manner of the embodiment of the present disclosure, the terminal may determine the length and interval length of the transmission unit in the same manner as the access network device.

[0250] In another implementation of the embodiment of the present disclosure, the access network device can configure at least one of the length and the interval length of the transmission unit to the terminal by means of configuration parameters, and the terminal can obtain at least one of the length and the interval length of the transmission unit by receiving the configuration parameters. The configuration parameters here can be radio resource control signaling.

[0251] In step 408, the terminal determines the length of the transmission cycle and the start transmission time.

[0252] In this implementation, the terminal determines the length of the transmission cycle and the start transmission time to be the same as those of the access network device. The terminal uses the method determined by itself instead of the method sent by the access network device, which can save signaling overhead and reduce system power consumption.

[0253] In the process of the terminal determining the length of the transmission cycle and the start transmission time, the parameter A and the parameter a can be obtained from the protocol, or can be configured to the terminal by the access network device together with the maximum number of repetitions Rmax.

[0254] In step 409, the access network device determines the starting position of each transmission cycle according to the start transmission time and the length of the transmission cycle, and repeatedly sends the downlink control channel in each transmission cycle according to the number of repetitions, the length of the transmission unit and the interval length.

[0255] In this implementation, each cycle includes more than two transmission units, and the total number of times the downlink control channel is repeatedly transmitted by the more than two transmission units is the number of repetitions.

[0256] Figure 8 is a schematic diagram of the transmission position provided by the embodiment of the present disclosure. Figure 8In each transmission period T, the resources used to transmit the downlink control channel can form at least two transmission units B, namely the shaded rectangles in the figure, each shaded rectangle represents a transmission of the downlink control channel. The length between the transmission units B is the aforementioned interval length.

[0257] Step 410: The terminal determines the starting position of each transmission cycle according to the starting transmission time and the length of the transmission cycle, and in each transmission cycle, according to the determined length of the transmission unit and the interval length, uses multiple repetitions in sequence to repeatedly receive the downlink control channel until the downlink control channel is correctly demodulated or all repetitions in the repetition set are traversed.

[0258] Exemplarily, the terminal may sequentially select values ​​from the repetition number set {1 / 8Rmax, 1 / 4Rmax, 1 / 2Rmax, Rmax} for repeated reception and demodulation. For example, within a transmission period, the downlink control channel is repeatedly received starting from the start transmission time, and then demodulated according to the number of repetitions in the set in a small to large manner until the downlink control channel is correctly demodulated or all the repetitions in the set are traversed. Of course, in addition to the small to large method, the value selection method may also be from large to small, or in random order.

[0259] In this implementation, the number of repetitions is determined by the terminal itself instead of being sent by the access network device, which can save signaling overhead and reduce system power consumption.

[0260] Fig. 9 1 is a schematic diagram of a structure of a downlink control channel transmission device according to an exemplary embodiment. The device has the function of implementing the terminal in the above method embodiment, and the function can be implemented by hardware or by hardware executing corresponding software. Fig. 9 As shown, the device includes: a receiving module 501.

[0261] The receiving module 501 is configured to repeatedly receive the downlink control channel on at least one transmission unit in a transmission period of the downlink control channel, and each transmission unit is used to repeatedly transmit the downlink control channel at least twice in succession.

[0262] Optionally, the receiving module 501 includes:

[0263] The determination submodule 511 is configured to determine a repetition number set, where the repetition number set includes a plurality of repetition numbers of different sizes, and the number of times the downlink control channel is repeatedly transmitted on at least one transmission unit is one of the repetition number sets;

[0264] The receiving submodule 512 is configured to repeatedly receive the downlink control channel using multiple repetition times in sequence starting from the start transmission time in each transmission cycle until the downlink control channel is correctly demodulated or all repetition times in the repetition time set are traversed.

[0265] Optionally, when the number of transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the method may further include:

[0266] The determination module 502 is configured to determine the length of the transmission unit and the interval length.

[0267] Optionally, the determination module 502 is configured to obtain a configuration signaling sent by the access network device, where the configuration signaling includes the length of the transmission unit;

[0268] Alternatively, obtain the length of the transmission unit configured in the protocol;

[0269] Alternatively, the length of the transmission unit is determined based on the relationship between the maximum number of repetitions and the threshold value, and the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle;

[0270] Alternatively, the length of the transmission unit is determined based on the number of repetitions used for the current transmission.

[0271] Optionally, the determination module 502 is configured to obtain a configuration signaling sent by the access network device, where the configuration signaling includes an interval length;

[0272] Alternatively, obtain the interval length configured in the protocol;

[0273] Alternatively, the interval length is determined based on the length of the transmission unit;

[0274] Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0275] Optionally, the determination module 502 is further configured to determine the length of the transmission period;

[0276] The receiving module 501 is configured to periodically receive a downlink control channel according to the length of a transmission period.

[0277] Optionally, the determination module 502 is configured to determine the length of the transmission cycle based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions;

[0278] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0279] Optionally, the determination module 502 is configured to determine a start transmission time;

[0280] The receiving module 501 is configured to receive the downlink control channel starting from the start transmission time in each transmission cycle.

[0281] Optionally, the determination module 502 is configured to determine the start transmission time based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions;

[0282] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0283] Optionally, the determination module 502 is configured to obtain a maximum number of repetitions, where the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle;

[0284] Based on the maximum number of repetitions, a repetition number set is determined, and the maximum value in the repetition number set is the maximum number of repetitions.

[0285] Optionally, the receiving module 501 is configured to receive radio resource control signaling, where the radio resource control signaling includes a maximum number of repetitions.

[0286] Fig.10 1 is a schematic diagram of a structure of a downlink control channel transmission device according to an exemplary embodiment. The device has the function of implementing the access network device in the above method embodiment, and the function can be implemented by hardware or by hardware executing corresponding software. Fig.10 As shown, the device includes: a sending module 601.

[0287] The sending module 601 is configured to repeatedly send the downlink control channel on at least one transmission unit in each transmission period of the downlink control channel, and each transmission unit is used to continuously transmit the downlink control channel at least twice.

[0288] Optionally, the sending module 601 includes:

[0289] The acquisition submodule 611 is configured to acquire the channel status information of the terminal;

[0290] A determination submodule 612 is configured to determine the number of repetitions based on the channel status information of the terminal;

[0291] The sending submodule 613 is configured to repeatedly send the downlink control channel according to a repetition number, where the number of times the downlink control channel is repeatedly transmitted on at least one transmission unit is the repetition number.

[0292] Optionally, when the number of transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the device may further include:

[0293] The determination module 602 is configured to determine the length of the transmission unit and the interval length.

[0294] Optionally, the determination module 602 is configured to obtain the length of the transmission unit configured in the protocol;

[0295] Alternatively, the length of the transmission unit is determined based on the relationship between the maximum number of repetitions and the threshold value, and the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle;

[0296] Alternatively, the length of the transmission unit is determined based on the number of repetitions used in the current transmission. For example, the length of the transmission unit can be set to the actual number of repetitions determined in the current transmission. That is, in a certain transmission, the actual number of repetitions determined is X, then the length of the transmission unit can be set to X.

[0297] Optionally, the determination module 602 is configured to obtain an interval length configured in the protocol;

[0298] Alternatively, the interval length is determined based on the length of the transmission unit;

[0299] Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0300] Optionally, the sending module 601 is configured to send at least one of a length and an interval length of a transmission unit by using configuration signaling.

[0301] Optionally, the determination module 602 is configured to determine the length of the transmission period;

[0302] The sending module 601 is configured to periodically send a downlink control channel according to the length of a transmission period.

[0303] Optionally, the determination module 602 is configured to determine the length of the transmission cycle based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions;

[0304] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0305] Optionally, the determination module 602 is configured to determine a start transmission time;

[0306] The sending module 601 is configured to send a downlink control channel starting from a start transmission time in each transmission cycle.

[0307] Optionally, the determination module 602 is configured to determine the start transmission time based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions;

[0308] The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

[0309] Optionally, the sending module 601 is configured to send radio resource control signaling, where the radio resource control signaling includes a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of a downlink control channel in each transmission cycle.

[0310] Fig.11 It is a block diagram of a terminal 700 according to an exemplary embodiment. The terminal 700 may include: a processor 701, a receiver 702, a transmitter 703, a memory 704 and a bus 705.

[0311] The processor 701 includes one or more processing cores. The processor 701 executes various functional applications and information processing by running software programs and modules.

[0312] The receiver 702 and the transmitter 703 may be implemented as a communication component, which may be a communication chip.

[0313] The memory 704 is connected to the processor 701 via a bus 705 .

[0314] The memory 704 may be used to store at least one instruction, and the processor 701 may be used to execute the at least one instruction to implement each step in the above method embodiment.

[0315] In addition, the memory 704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or an optical disk, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (SRAM), a read-only memory (ROM), a magnetic memory, a flash memory, and a programmable read-only memory (PROM).

[0316] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one instruction, at least one program, a code set or an instruction set is stored, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the downlink control channel transmission method provided by the above-mentioned each method embodiment.

[0317] Fig.12 8 is a block diagram of an access network device 800 according to an exemplary embodiment. The access network device 800 may include: a processor 801, a receiver 802, a transmitter 803 and a memory 804. The receiver 802, the transmitter 803 and the memory 804 are respectively connected to the processor 801 through a bus.

[0318] The processor 801 includes one or more processing cores, and the processor 801 executes the method performed by the access network device in the downlink control channel transmission method provided in the embodiment of the present disclosure by running software programs and modules. The memory 804 can be used to store software programs and modules. Specifically, the memory 804 can store an operating system 8041 and an application module 8042 required for at least one function. The receiver 802 is used to receive communication data sent by other devices, and the transmitter 803 is used to send communication data to other devices.

[0319] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one instruction, at least one program, a code set or an instruction set is stored, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the downlink control channel transmission method provided by the above-mentioned each method embodiment.

[0320] An exemplary embodiment of the present disclosure further provides a downlink control channel transmission system, the downlink control channel transmission system comprising a terminal and an access network device. The terminal is such as Fig.11 The terminal provided in the embodiment shown in the figure. The access network device is as follows Fig.12 The illustrated embodiment provides an access network device.

[0321] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0322] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A downlink control channel transmission method, characterized in that: The method comprises: The downlink control channel is repeatedly received on at least one transmission unit in a transmission period of the downlink control channel, and each of the transmission units is used for continuously and repeatedly transmitting the downlink control channel at least twice.

2. The method according to claim 1, characterized in that: The repeatedly receiving the downlink control channel on at least one transmission unit in the transmission period of the downlink control channel comprises: Determine a repetition number set, the repetition number set including a plurality of repetition numbers of different sizes, and the number of times the downlink control channel is repeatedly transmitted on the at least one transmission unit is one of the repetition number sets; In each transmission cycle, the multiple repetition times are sequentially used to repeatedly receive the downlink control channel starting from the start transmission time until the downlink control channel is correctly demodulated or all the repetition times in the repetition time set are traversed.

3. The method according to claim 1 or 2, characterized in that: When the number of the transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the method further includes: The length of the transmission unit and the length of the interval are determined.

4. The method according to claim 3, characterized in that Determining the length of the transmission unit includes: Acquire a configuration signaling sent by an access network device, where the configuration signaling includes the length of the transmission unit; Alternatively, obtaining the length of the transmission unit configured in the protocol; Alternatively, the length of the transmission unit is determined based on a relationship between a maximum number of repetitions and a threshold value, wherein the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle; Alternatively, the length of the transmission unit is determined based on the number of repetitions used in the current transmission.

5. The method according to claim 3, characterized in that: Determining the interval length comprises: Acquire a configuration signaling sent by an access network device, where the configuration signaling includes the interval length; Alternatively, obtaining the interval length configured in the protocol; Alternatively, the interval length is determined based on the length of the transmission unit; Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: Determine the length of the transmission cycle; The downlink control channel is received periodically according to the length of the transmission period.

7. The method according to claim 6, characterized in that Determining the length of the transmission cycle includes: Determining the length of the transmission cycle based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions; The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

8. The method according to any one of claims 1 to 7, characterized in that: The method further comprises: Determine the start transmission time; In each transmission cycle, the downlink control channel is received starting from the start transmission time.

9. The method according to claim 8, characterized in that The determining of the start transmission time comprises: Determining the start transmission time based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions; The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

10. The method according to any one of claims 2 to 9, characterized in that: The determining of the set of repetition times comprises: Obtain a maximum number of repetitions, where the maximum number of repetitions is the maximum number of repetitions of a downlink control channel in each transmission cycle; Based on the maximum number of repetitions, the repetition number set is determined, and the maximum value in the repetition number set is the maximum number of repetitions.

11. The method according to claim 10, characterized in that The obtaining of the maximum number of repetitions includes: A radio resource control signaling is received, where the radio resource control signaling includes the maximum number of repetitions.

12. A downlink control channel transmission method, characterized in that: The method comprises: The downlink control channel is repeatedly sent on at least one transmission unit in each transmission cycle of the downlink control channel, and each of the transmission units is used for continuously transmitting the downlink control channel at least twice.

13. The method according to claim 12, characterized in that The repeatedly sending the downlink control channel on at least one transmission unit in each transmission period of the downlink control channel comprises: Obtaining the channel status information of the terminal; Determining the number of repetitions based on channel status information of the terminal; The downlink control channel is repeatedly sent according to the repetition number, and the number of times the downlink control channel is repeatedly transmitted on the at least one transmission unit is the repetition number.

14. The method according to claim 12 or 13, characterized in that When the number of the transmission units is greater than 1, the interval lengths between any adjacent transmission units are the same, and the method further includes: The length of the transmission unit and the length of the interval are determined.

15. The method according to claim 14, characterized in that Determining the length of the transmission unit includes: Obtaining the length of the transmission unit configured in the protocol; Alternatively, the length of the transmission unit is determined based on a relationship between a maximum number of repetitions and a threshold value, wherein the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle; Alternatively, the length of the transmission unit is determined based on the number of repetitions used in the current transmission.

16. The method according to claim 14, characterized in that Determining the interval length comprises: Obtaining the interval length configured in the protocol; Alternatively, the interval length is determined based on the length of the transmission unit; Alternatively, the interval length is determined based on a maximum number of repetitions, where the maximum number of repetitions is a maximum number of repetitions of a downlink control channel in each transmission cycle.

17. The method according to any one of claims 14 to 16, characterized in that The method further comprises: At least one of the length of the transmission unit and the interval length is sent using configuration signaling.

18. The method according to any one of claims 12 to 17, characterized in that The method further comprises: Determine the length of the transmission cycle; The downlink control channel is sent periodically according to the length of the transmission period.

19. The method according to claim 18, characterized in that Determining the length of the transmission cycle includes: Determining the length of the transmission cycle based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions; The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

20. The method according to any one of claims 12 to 19, characterized in that The method further comprises: Determine the start transmission time; In each transmission cycle, the downlink control channel is sent starting from the start transmission time.

21. The method according to claim 20, characterized in that The determining of the start transmission time comprises: Determining the start transmission time based on at least one of the length of the transmission unit, the interval length, and the maximum number of repetitions; The maximum number of repetitions is the maximum number of repetitions of the downlink control channel in each transmission cycle.

22. The method according to any one of claims 12 to 21, characterized in that The method further comprises: A radio resource control signaling is sent, wherein the radio resource control signaling includes a maximum number of repetitions, and the maximum number of repetitions is the maximum number of repetitions of a downlink control channel in each transmission cycle.

23. A downlink control channel transmission device, characterized in that: The device comprises: The receiving module is configured to repeatedly receive the downlink control channel on at least one transmission unit in a transmission period of the downlink control channel, and each of the transmission units is used to repeatedly transmit the downlink control channel at least twice in succession.

24. A downlink control channel transmission device, characterized in that: The device comprises: The sending module is configured to repeatedly send the downlink control channel on at least one transmission unit in each transmission period of the downlink control channel, and each of the transmission units is used to continuously transmit the downlink control channel at least twice.

25. A terminal, characterized in that: The terminal comprises: processor; a memory for storing processor-executable instructions; The processor is configured to load and execute the executable instructions to implement the downlink control channel transmission as described in any one of claims 1 to 11.

26. An access network device, characterized in that: The access network equipment includes: processor; a memory for storing processor-executable instructions; The processor is configured to load and execute the executable instructions to implement the downlink control channel transmission as described in any one of claims 12 to 22.

27. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor, the downlink control channel transmission described in any one of claims 1 to 11 can be executed, or the downlink control channel transmission described in any one of claims 12 to 22 can be executed.

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