A communication method and apparatus

Abstract

A communication method and apparatus for configuring a carrier occupied by a corresponding physical downlink control channel for a terminal device can improve the coverage capability of the PDCCH, increase the demodulation success rate of the terminal device, and thus reduce the transmission delay. The method is as follows: The network device determines first information, where the first information is used to indicate a candidate set of carriers occupied by the physical downlink control channel PDCCH, and the candidate set of carriers includes at least one carrier; the network device sends the first information to the terminal device; the terminal device blindly detects the downlink control information in the PDCCH on the at least one carrier according to the first information. In this way, by transmitting the PDCCH on at least one carrier, the coverage capability of the PDCCH can be improved, the demodulation success rate of the terminal device can be increased, and thus the transmission delay can be reduced.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a communication method and apparatus. Background Art

[0002] One of the main features of narrowband systems (such as power private networks, etc.) is narrowband. For example, for a power private network with a spectrum of 230 megahertz (MHz) or 400 MHz, the carrier spectral bandwidth is generally only 12.5 kilohertz (kHz) or 25 kHz. Wireless communication protocols for such spectra generally need to expand time-domain resources to improve the coverage of the wireless control channel. For example, the network device generally selects a scheduling unit of 10 milliseconds (ms) or 20 ms granularity level for a single scheduling unit, and it is not suitable to use the 1 ms scheduling granularity defined by the 3GPP protocol. In addition, in the Internet of Things (IoT) remote service scenario, the demodulation success rate of the terminal device is generally improved through multiple repeated transmissions in the time domain, so as to improve the coverage of the wireless control channel. However, the change of the scheduling unit will have a certain impact on the overall service delay, and when multiple repeated transmissions are required for IoT remote services, the delay will be further increased. Summary of the Invention

[0003] This application provides a communication method and apparatus, which can configure the carrier occupied by the corresponding physical downlink control channel (PDCCH) for the terminal device, improve the coverage of the PDCCH, increase the demodulation success rate of the terminal device, and thus reduce the transmission delay.

[0004] In a first aspect, this application provides a communication method, which may include: The network device determines first information, where the first information is used to indicate a candidate set of carriers occupied by the physical downlink control channel (PDCCH), and the candidate set of carriers includes at least one carrier; The network device sends the first information to the terminal device.

[0005] Through the above method, by transmitting the PDCCH in carrier aggregation in the frequency domain, the coverage of the physical control channel can be improved. Subsequently, the terminal device can blindly detect the downlink control information (DCI) on the at least one carrier, which can increase the demodulation success rate of the terminal device, and thus reduce the transmission delay.

[0006] In a possible design, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a delay-insensitive service type, the number of the at least one carrier is a second value; where the first value is greater than the second value.

[0007] Through the above method, the terminal device of the delay-sensitive service type can blindly detect the DCI in the PDCCH on more carriers in the frequency domain, thereby improving the demodulation success rate and reducing the transmission delay.

[0008] In a possible design, the number of the at least one carrier is related to the distance between the terminal device and the network device; when the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; when the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

[0009] Through the above method, the remote terminal device can blindly detect the DCI in the PDCCH on more carriers in the frequency domain, thereby improving the demodulation success rate and reducing the transmission delay.

[0010] In a possible design, the first information is further used to indicate a candidate set of the repetition transmission times corresponding to the PDCCH, and the candidate set of the repetition transmission times includes the repetition transmission times of the PDCCH in the time domain. This can flexibly configure the time-frequency resources of the PDCCH in the frequency domain and the time domain, so as to make the demodulation success rate of the subsequent terminal device higher.

[0011] In a possible design, the repetition transmission times of the PDCCH in the time domain are related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the repetition transmission times of the PDCCH in the time domain are a fifth value; when the service type of the terminal device is a delay-insensitive service type, the repetition transmission times of the PDCCH in the time domain are a sixth value; wherein, the fifth value is less than the sixth value.

[0012] Through the above method, on the basis of not responding to the delay of the terminal device of the delay-sensitive service type, the PDCCH channel code rate can be reduced and the UE PDCCH demodulation success rate can be improved; for the delay-insensitive service type, by flexibly configuring the time-frequency resources of the PDCCH in the frequency domain and the time domain, the downlink PDCCH coverage ability of the cell can be improved.

[0013] In a possible design, the number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; when the terminal device is at a third distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is a seventh value; when the terminal device is at a fourth distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is an eighth value; where the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value. This can reduce the problem that services of some remote terminal devices cannot be accessed.

[0014] In a second aspect, the present application provides a communication method, which may include: The terminal device receives first information from the network device, and the first information is used to indicate a carrier candidate set occupied by a physical downlink control channel PDCCH, and the carrier candidate set includes at least one carrier; The terminal device blindly detects downlink control information DCI in the PDCCH on the at least one carrier according to the first information.

[0015] By the above method, by achieving PDCCH transmission in carrier aggregation in the frequency domain, the coverage ability of the physical control channel can be improved. Subsequently, the terminal device can blindly detect DCI on the at least one carrier, which can improve the demodulation success rate of the terminal device, thereby reducing the transmission delay.

[0016] In a possible design, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a delay-insensitive service type, the number of the at least one carrier is a second value; where the first value is greater than the second value.

[0017] By the above method, terminal devices of the delay-sensitive service type can blindly detect DCI in the PDCCH on more carriers in the frequency domain, thereby improving the demodulation success rate and reducing the transmission delay.

[0018] In a possible design, the number of the at least one carrier is related to the distance between the terminal device and the network device; when the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; when the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; where the first distance is farther than the second distance, and the third value is greater than the fourth value.

[0019] By the above method, remote terminal devices can blindly detect DCI in the PDCCH on more carriers in the frequency domain, thereby improving the demodulation success rate and reducing the transmission delay.

[0020] In a possible design, the first information is further used to indicate a candidate set of the repetition transmission times corresponding to the PDCCH, where the candidate set of the repetition transmission times includes the repetition transmission times of the PDCCH in the time domain; further, the terminal device blindly detects the DCI in the PDCCH of each repetition transmission according to the repetition transmission times of the PDCCH in the time domain. This can flexibly configure the time-frequency resources of the PDCCH in both the frequency domain and the time domain, so as to improve the demodulation success rate of the terminal device subsequently.

[0021] In a possible design, the repetition transmission times of the PDCCH in the time domain are related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the repetition transmission times of the PDCCH in the time domain are a fifth value; when the service type of the terminal device is a delay-insensitive service type, the repetition transmission times of the PDCCH in the time domain are a sixth value; where the fifth value is less than the sixth value.

[0022] Through the above method, on the basis of not responding to the delay of the terminal device of the delay-sensitive service type, the channel code rate of the PDCCH can be reduced, and the demodulation success rate of the UE PDCCH can be improved; for the non-delay-sensitive service type, by flexibly configuring the time-frequency resources of the PDCCH in both the frequency domain and the time domain, the downlink PDCCH coverage ability of the cell can be improved.

[0023] In a possible design, the repetition transmission times of the PDCCH in the time domain are related to the distance between the terminal device and the network device; when the terminal device is at a third distance from the network device, the repetition transmission times of the PDCCH in the time domain are a seventh value; when the terminal device is at a fourth distance from the network device, the repetition transmission times of the PDCCH in the time domain are an eighth value; where the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

[0024] This can reduce the problem that the services of some remote terminal devices cannot be accessed.

[0025] In a third aspect, the present application further provides a network device, which has the functions of the network device in the method examples of the first aspect or the second aspect above. The corresponding functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0026] In a possible design, the structure of the network device includes a processing unit and a transceiver unit, and these units can execute the corresponding functions in the method examples of the first aspect or the second aspect above. For specific details, refer to the detailed description in the method examples, and no further elaboration will be provided here.

[0027] In a possible design, the structure of the network device includes a transceiver and a processor, and optionally a memory. The transceiver is used to transmit and receive data or information, and communicate with other devices in the communication system. The processor is configured to support the network device in performing the corresponding functions of the network device in the methods of the first aspect or the second aspect described above. The memory is coupled to the processor and stores the necessary program instructions and data of the network device.

[0028] In a fourth aspect, the present application also provides a terminal device, which has the functions of the terminal device in the method examples of the first aspect or the second aspect described above. The corresponding functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0029] In a possible design, the structure of the terminal device includes a processing unit and a transceiver unit, and these units can perform the corresponding functions in the method examples of the first aspect or the second aspect described above. For specific details, refer to the detailed description in the method examples and will not be elaborated here.

[0030] In a possible design, the structure of the terminal device includes a transceiver and a processor, and optionally a memory. The transceiver is used to transmit and receive data or information, and communicate with other devices in the communication system. The processor is configured to support the terminal device in performing the corresponding functions of the terminal device in the methods of the first aspect or the second aspect described above. The memory is coupled to the processor and stores the necessary program instructions and data of the terminal device.

[0031] In a fifth aspect, the present application also provides a communication system, which includes at least one terminal device and network device mentioned in the above design. Further, the network device in the communication system can perform any one of the methods performed by the network device in the methods of the first aspect or the second aspect described above, and the terminal device in the communication system can perform any one of the methods performed by the terminal device in the methods of the first aspect or the second aspect described above.

[0032] Sixth aspect, the present application provides a computer-readable storage medium storing computer-executable instructions, which are used to cause a computer to execute any of the methods in the above first aspect or second aspect when being called by the computer. Exemplarily, the computer-readable storage medium may be any available medium that can be accessed by the computer. Taking this as an example but not limited to: the computer-readable medium may include a non-transitory computer-readable medium, random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM or other optical disc storage, magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by the computer.

[0033] Seventh aspect, an embodiment of the present application provides a computer program product including computer program code or instructions, which causes a computer to implement the methods in the above first aspect and any possible design thereof, and the second aspect and any possible design thereof when running on the computer.

[0034] Eighth aspect, the present application provides a chip coupled to a memory for reading and executing program instructions stored in the memory to implement the methods in the above first aspect and any possible design thereof, and the second aspect and any possible design thereof.

[0035] For the various aspects in the above third aspect to eighth aspect and the possible technical effects achieved by each aspect, please refer to the technical effects that can be achieved by various possible solutions in the above first aspect or second aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the architecture of a communication system provided by the present application;

[0037] Figure 2 is a schematic diagram of discrete carrier aggregation provided by the present application;

[0038] Figure 3 is a schematic diagram of the blind detection process of a terminal device provided by the present application;

[0039] Figure 4 is a flowchart of a communication method provided by the present application;

[0040] Figure 5 is a schematic diagram of blind detection DCI of a terminal device provided by the present application;

[0041] Figure 6 A structural schematic diagram of a network device provided for this application;

[0042] Figure 7 A structural schematic diagram of a terminal device provided for this application;

[0043] Figure 8 A structural diagram of a network device provided for this application;

[0044] Figure 9 A structural diagram of a terminal device provided for this application. Specific embodiments

[0045] The following will further describe this application in detail with reference to the accompanying drawings.

[0046] The embodiments of this application provide a communication method and apparatus for configuring a carrier occupied by a corresponding physical downlink control channel (PDCCH) for a terminal device, which can improve the coverage ability of the PDCCH, improve the demodulation success rate of the terminal device, and thus reduce the transmission delay. Among them, the methods and apparatuses described in this application are based on the same technical concept. Since the principles of the methods and apparatuses for solving problems are similar, the implementation of the apparatus and the method can be referred to each other, and the repeated parts will not be described again.

[0047] Figure 1 Shows the architecture of a possible communication system applicable to the communication method provided by the embodiments of this application. The communication system is a narrowband communication system. The communication system may include a network device and at least one terminal device. Among them:

[0048] The network device is a device with wireless transceiver function or a chip that can be set in the network device. The network device includes but is not limited to: base stations (gNB, eNB), radio network controllers (RNC), Node Bs (NB), base station controllers (BSC), base transceiver stations (BTS), home base stations (e.g., home evolved NodeB, or home Node B, HNB), baseband units (BBU), access points (AP) in wireless fidelity (WIFI) systems, wireless relay nodes, wireless backhaul nodes, transmission and reception points (TRP or transmission point, TP), etc. It can also be a network node that constitutes a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

[0049] In some deployments, a gNB can include a centralized unit (CU) and a DU. A gNB can also include a radio unit (RU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU implements radio resource control (RRC) and the functions of the packet data convergence protocol (PDCP) layer, and the DU implements the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. Since the information of the RRC layer will ultimately become the information of the PHY layer, or is transformed from the information of the PHY layer, thus, in this architecture, high-layer signaling, such as RRC layer signaling or PHCP layer signaling, can also be considered to be sent by the DU, or sent by the DU + RU. It can be understood that the network device can be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be classified as a network device in the radio access network (RAN), or the CU can be classified as a network device in the core network (CN), and this is not limited.

[0050] The terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile device, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in the embodiments of this application may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, and so on. The embodiments of this application do not limit the application scenarios. In this application, the terminal device with wireless transceiver function and the chip that can be set in the foregoing terminal device are collectively referred to as the terminal device.

[0051] In the communication system, different terminal devices are at different distances from the network device. For example, Figure 1 the terminal device 1 shown in the figure is farther from the network device than the terminal device 2 is from the network device. Thus, relative to the terminal device 1, the terminal device 2 can be regarded as a remote terminal device.

[0052] In the communication method provided by the embodiments of this application, both the network device and the terminal device support carrier aggregation technology, and the network device supports carrier-bound scheduling of PDCCH, and the terminal device supports vertical blind detection of different carrier bundling.

[0053] It should be noted that Figure 1 the communication system shown is merely an example, and this application does not limit the number and layout of devices in the communication system.

[0054] Currently, one of the characteristics of narrowband systems, such as power private networks in the 230M or 400M spectrum, is narrowband: generally, the carrier spectrum bandwidth is only 12.5kHz or 25kHz. Such spectrum wireless communication protocols generally need to expand the time-domain resources to improve the coverage ability of the wireless control channel. For example, the single scheduling unit of network equipment tends to select a granularity level of 10ms or 20ms, and it is not suitable to adopt the 1ms scheduling granularity defined by the 3GPP protocol. The change of the scheduling unit will have a certain impact on the overall service delay. Especially for the Internet of Things (IoT) remote services that need to be transmitted repeatedly for the terminal device to successfully demodulate, the delay is further increased.

[0055] Another characteristic of the power private network in the 230M or 400M spectrum is discreteness: the effective carriers are not continuous in the physical air interface frequency domain and are discretized. Therefore, it is necessary to use the discrete carrier aggregation technology to bundle (i.e., aggregate) the carriers for use, so as to improve the one-time scheduling transmission ability of a single terminal device in the narrowband scenario of the air interface or reduce the transmission code rate and improve the coverage ability, as Figure 2 shown in the schematic diagram of discrete carrier aggregation. Figure 2 It can be seen that different numbers of carrier aggregations are performed in the frequency domain according to different requirements.

[0056] Due to the introduction of the discrete carrier technology, in the narrowband spectrum of the power private network, the wireless physical control channel can consider not only following the narrow-band internet of things (NB-IoT) technology and using different repetition times to adapt to the demodulation requirements of terminal devices in different coverage areas, but also considering the vertical dynamic adjustment method of carrier resource binding (i.e., carrier aggregation) to further improve the coverage ability of the narrowband system control channel and improve the demodulation success rate of terminal devices.

[0057] Currently, in the LTE system, the physical downlink control channel (PDCCH) defines different aggregation levels (aggregation level) L∈{1, 2, 4, 8} to meet the demodulation requirements of terminal devices with different coverages. For example, as shown in Table 1.

[0058] Table 1 PDCCH candidates monitored by a UE (UE monitored PDCCH candidates)

[0059]

[0060] In the NB-IoT system, the wireless physical control channel NPDCCH defines different aggregation levels and different repetition levels \(R\in\{1,2,4,8,16,32,64,128,256,512,1024,2048\}\) to meet the demodulation requirements of terminal devices with different coverage. As shown in Table 2 for example.

[0061] Table 2 NPDCCH UE-specific search space candidates

[0062]

[0063]

[0064] In the private power network, a similar NB-IoT technology is adopted, and the repetition number of frames (repetitionNumber) is dynamically adjusted to meet the demodulation requirements of terminal devices with different coverage. As shown in Table 3 for example.

[0065] Table 3 PDCCH UE-specific search space candidates

[0066]

[0067] Currently, existing narrowband systems follow the traditional dynamic adjustment method of the repetition number in the time domain (horizontally) of NB-IoT to increase the coverage ability of the wireless control channel, without fully exploiting the advantages of narrowband discrete carrier aggregation technology. The network device configures the maximum repetition number of PDCCH \(R_{max}=8\). For terminal devices at the near end, middle end, and far end (where near, middle, and far are determined by the distance of the terminal device from the network device), the terminal device adopts different PDCCH repetition numbers \(R\) for terminal devices at the near end, middle end, and far end to achieve successful demodulation of the downlink control information (DCI) of the terminal device, so as to achieve the balance between system capacity and service coverage. For example, the terminal device at the near end adopts the PDCCH repetition number \(R = 1\), the terminal device at the middle end adopts the PDCCH repetition number \(R = 2\), and the terminal device at the far end adopts the PDCCH repetition number \(R = 8\). In this mechanism, the terminal device at the far end needs 8 frames within the PDCCH scheduling period to successfully parse the DCI. In such a scenario, the blind detection process of the terminal device can be as Figure 3 shown. The terminal device will perform blind detection up to 15 times within the scheduling period, and the DCI belonging to the terminal device at the far end can be blindly detected at the last moment within the period. This will cause a relatively large transmission delay.

[0068] Based on this, the present application proposes a communication method. On the premise that a narrowband system supports carrier aggregation, a technology for dynamically adjusting the number of carrier bindings (aggregation number) in the frequency domain (longitudinally) of the control channel is introduced to improve the coverage ability of the control channel, increase the demodulation success rate of terminal devices, and thus reduce the transmission delay. At the same time, it can also be combined with the original dynamic adjustment method of the number of repetitions in the horizontal direction (time domain) to further improve the coverage ability of the control channel.

[0069] In the present application, both the terminal device and the network device can support the first PDCCH candidate (PDCCH candidates) method and the second PDCCH candidate method. Among them, the first PDCCH candidate method is newly proposed in the present application and can also be called the NEW PDCCH CANDIDATES method, and the second PDCCH candidate method is a reused existing one and is also called the OLD PDCCH CANDIDATES method. Specifically, the NEW PDCCH CANDIDATES method and the OLD PDCCH CANDIDATES method can be shown in Table 4 and Table 5 below respectively.

[0070] Table 4 NEW PDCCH CANDIDATES

[0071]

[0072] Table 5 OLD PDCCH CANDIDATES

[0073]

[0074] Furthermore, based on the above two PDCCH candidate methods, the present application can be divided into the following two application scenarios:

[0075] Application Scenario 1: In a narrowband system, for delay-sensitive services, the network device can preferentially select the NEW PDCCH CANDIDATES method for wireless physical control channel resource scheduling. The terminal device supports blind detection at the frequency domain position. Different carrier aggregations (bindings) can reduce the PDCCH channel code stream, ensuring that the demodulation success rate is improved without increasing the scheduling delay for remote service-sensitive services.

[0076] Application Scenario 2: In a narrowband system, for non-delay-sensitive services, when the OLD PDCCH CANDIDATES method still cannot meet the coverage range, the NEW PDCCH CANDIDATES method can be used in an overlay manner to improve the performance of wireless coverage.

[0077] Among them, the delay-sensitive services may include fine control services, power distribution services (such as power generation, power transmission, power consumption, etc.). Among them, the general delay requirement for the fine control service is less than 30 milliseconds (ms), and the general requirement for the power distribution service is less than 100 ms. The non-delay-sensitive services may include usage collection services (such as electricity meter reading, etc.), generally requiring less than 2 s.

[0078] To more clearly describe the technical solutions of the embodiments of the present application, the communication methods and devices provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0079] A communication method provided by an embodiment of the present application can be applicable to Figure 1 the communication system shown in. Refer to Figure 4 shown, the specific process of this method may include:

[0080] Step 401: The network device determines first information, and the first information is used to indicate a carrier candidate set occupied by the PDCCH, and the carrier candidate set includes at least one carrier.

[0081] Step 402: The network device sends the first information to the terminal device.

[0082] Step 403: The terminal device blindly detects the DCI in the PDCCH on the at least one carrier according to the first information.

[0083] In an optional implementation manner, the number of the at least one carrier is related to the service type of the terminal device; for example, when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a delay-insensitive service type, the number of the at least one carrier is a second value; wherein, the first value is greater than the second value.

[0084] Through the above method, the terminal device of the delay-sensitive service type can blindly detect the DCI in the PDCCH on more carriers in the frequency domain, thereby improving the demodulation success rate and reducing the transmission delay.

[0085] In another optional implementation, the number of the at least one carrier may also be related to the distance between the terminal device and the network device (that is, terminal devices with different coverage levels); for example, when the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; when the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

[0086] Through the above method, the remote terminal device can blindly detect the DCI in the PDCCH on more carriers in the frequency domain, thereby improving the demodulation success rate and reducing the transmission delay.

[0087] Of course, the above two optional implementation manners can be combined, that is, considering both the service type of the terminal device and the distance between the terminal device and the network device, and jointly configuring the number of the at least one carrier, so as to better meet the demodulation requirements of the terminal device.

[0088] In a specific implementation manner, the first information may further be used to indicate a candidate set of the repetition transmission times corresponding to the PDCCH, and the candidate set of the repetition transmission times includes the repetition transmission times of the PDCCH in the time domain. Further, the terminal device blindly detects the DCI in the PDCCH for each repetition transmission according to the repetition transmission times of the PDCCH in the time domain. In this way, the time-frequency resources of the PDCCH can be flexibly configured in the frequency domain and the time domain, so that the demodulation success rate of the subsequent terminal device is higher.

[0089] In one example, the repetition transmission times of the PDCCH in the time domain are related to the service type of the terminal device; for example, when the service type of the terminal device is a latency-sensitive service type, the repetition transmission times of the PDCCH in the time domain are a fifth value; when the service type of the terminal device is a latency-insensitive service type, the repetition transmission times of the PDCCH in the time domain are a sixth value; where the fifth value is less than the sixth value.

[0090] Through the above method, on the basis of not responding to the latency of the terminal device of the latency-sensitive service type, the channel code rate of the PDCCH can be reduced, and the demodulation success rate of the UE PDCCH can be improved; for the non-latency-sensitive service type, by flexibly configuring the time-frequency resources of the PDCCH in the frequency domain and the time domain, the downlink PDCCH coverage ability of the cell can be improved.

[0091] In another example, the repetition transmission times of the PDCCH in the time domain are related to the distance between the terminal device and the network device; for example, when the terminal device is at a third distance from the network device, the repetition transmission times of the PDCCH in the time domain are a seventh value; when the terminal device is at a fourth distance from the network device, the repetition transmission times of the PDCCH in the time domain are an eighth value; where the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value. In this way, the problem that some services of the remote terminal device cannot be accessed can be reduced.

[0092] In this application, the network device can adopt an adaptive priority policy based on the above various situations. For example, for service types sensitive to latency, the carrier candidate set method is preferentially selected, and for service types not sensitive to latency, the candidate set of the number of retransmissions is preferentially selected.

[0093] By using the communication method provided in this application, the carrier occupied by the PDCCH can be configured for the terminal device by combining carrier aggregation, which can improve the coverage ability of the PDCCH, increase the demodulation success rate of the terminal device, and thus reduce the transmission latency.

[0094] Based on the above embodiments, a specific example is used to illustrate the beneficial effects of the communication method provided in this application. For example, the maximum carrier binding (aggregation) Cmax of the PDCCH configured by the network device is 8. For proximal, middle, and distal terminal devices, the network device schedules them by using different numbers C of PDCCH carriers for the proximal, middle, and distal terminal devices, so as to successfully demodulate the DCI of the terminal device, thereby achieving a balance between system capacity and service coverage. For example, for the proximal terminal device, the number of carriers C = 1 is used; for the middle terminal device, the number of carriers C = 2 is used; for the distal terminal device, the number of carriers C = 8 is used. In this mechanism, the multi-carrier bundling of the carrier aggregation technology is used to reduce the channel code rate, so that the distal terminal device can also be successfully blindly detected for the control information only within one frame. As Figure 5 As shown in the schematic diagram of the terminal device blindly detecting the DCI, it can be obtained that the terminal device completes 15 blind detections all in the 0th frame, and the distal terminal device also completes the blind detection in the 0th frame. This can improve the demodulation success rate of the terminal device and thus reduce the latency.

[0095] Based on the above embodiments, the embodiments of this application further provide a terminal device, and this network device is applied to Figure 1 the communication system shown. The network device can be used to implement Figure 4 the functions of the network device in the communication method shown. Referring to Figure 6 as shown, the network device can include a processing unit 601 and a transceiver unit 602. Specifically:

[0096] The processing unit 601 is used to determine first information, and the first information is used to indicate a carrier candidate set occupied by the PDCCH, and the carrier candidate set includes at least one carrier; the transceiver unit 602 is used to send the first information to the terminal device.

[0097] In an optional implementation manner, the number of the at least one carrier is related to the service type of the terminal device;

[0098] When the service type of the terminal device is a latency-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a latency-insensitive service type, the number of the at least one carrier is a second value; wherein, the first value is greater than the second value.

[0099] In another alternative embodiment, the number of the at least one carrier is related to the distance between the terminal device and the network device; when the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; when the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

[0100] Optionally, the first information is further used to indicate a candidate set of repetition transmission times corresponding to the PDCCH, and the candidate set of repetition transmission times includes the repetition transmission times of the PDCCH in the time domain.

[0101] In one example, the repetition transmission times of the PDCCH in the time domain are related to the service type of the terminal device; when the service type of the terminal device is a latency-sensitive service type, the repetition transmission times of the PDCCH in the time domain are a fifth value; when the service type of the terminal device is a latency-insensitive service type, the repetition transmission times of the PDCCH in the time domain are a sixth value; wherein, the fifth value is less than the sixth value.

[0102] In another example, the repetition transmission times of the PDCCH in the time domain are related to the distance between the terminal device and the network device; when the terminal device is at a third distance from the network device, the repetition transmission times of the PDCCH in the time domain are a seventh value; when the terminal device is at a fourth distance from the network device, the repetition transmission times of the PDCCH in the time domain are an eighth value; wherein, the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

[0103] Based on the above embodiments, an embodiment of the present application further provides a terminal device, and this terminal device is applied to Figure 1 the communication system shown. The terminal device can be used to implement Figure 4 the functions of the terminal device in the communication method shown. Referring to Figure 7 shown, this terminal device may include a transceiver unit 701 and a processing unit 702. Specifically:

[0104] The transceiver unit 701 is configured to receive first information from a network device, where the first information is used to indicate a set of carrier candidates occupied by a PDCCH, and the set of carrier candidates includes at least one carrier; the processing unit 702 is configured to blindly detect DCI in the PDCCH on the at least one carrier according to the first information.

[0105] In an alternative embodiment, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a latency-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a latency-insensitive service type, the number of the at least one carrier is a second value; wherein, the first value is greater than the second value.

[0106] In another alternative embodiment, the number of the at least one carrier is related to the distance between the terminal device and the network device; when the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; when the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

[0107] Optionally, the first information is further used to indicate a set of candidate retransmission times corresponding to the PDCCH, and the set of candidate retransmission times includes the retransmission times of the PDCCH in the time domain; further, the processing unit 702 is further configured to blindly detect DCI in the PDCCH for each retransmission according to the retransmission times of the PDCCH in the time domain.

[0108] In one example, the retransmission times of the PDCCH in the time domain are related to the service type of the terminal device; when the service type of the terminal device is a latency-sensitive service type, the retransmission times of the PDCCH in the time domain are a fifth value; when the service type of the terminal device is a latency-insensitive service type, the retransmission times of the PDCCH in the time domain are a sixth value; wherein, the fifth value is less than the sixth value.

[0109] In another example, the retransmission times of the PDCCH in the time domain are related to the distance between the terminal device and the network device; when the terminal device is at a third distance from the network device, the retransmission times of the PDCCH in the time domain are a seventh value; when the terminal device is at a fourth distance from the network device, the retransmission times of the PDCCH in the time domain are an eighth value; wherein, the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

[0110] It should be noted that the division of units in the embodiments of the present application is illustrative, merely a logical function division, and there may be other division methods in actual implementation. In the embodiments of the present application, each functional unit may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0111] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store program codes.

[0112] Based on the above embodiments, the embodiments of the present application further provide a network device, and the network device is used to implement the functions of the network device in the Figure 4 communication method shown. Referring to Figure 8 shown, the network device 800 includes: a transceiver 801 and a processor 802, where:

[0113] The processor 802 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 802 may further include a hardware chip. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. When implementing the above functions, the processor 802 may be implemented by hardware, or of course, by hardware executing corresponding software.

[0114] The transceiver 801 and the processor 802 are interconnected. Optionally, the transceiver 801 and the processor 802 are interconnected via a bus 804; the bus 804 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 8 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0115] Optionally, the network device may further include a memory 803, which is used to store programs, etc. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 803 may include a RAM, and may also include a non-volatile memory, such as at least one disk memory. The processor 802 executes the application program stored in the memory 803 to implement the above functions, so as to implement the Figure 4 communication method as shown.

[0116] Specifically, when the network device implements the Figure 4 functions of the network device in the communication method as shown, it may include:

[0117] The processor 802 is configured to determine first information for indicating a set of carrier candidates occupied by the PDCCH, where the set of carrier candidates includes at least one carrier; the transceiver 801 is configured to send the first information to the terminal device.

[0118] In an alternative embodiment, the number of the at least one carrier is related to the service type of the terminal device;

[0119] When the service type of the terminal device is a latency-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a latency-insensitive service type, the number of the at least one carrier is a second value; where the first value is greater than the second value.

[0120] In another alternative embodiment, the number of the at least one carrier is related to the distance between the terminal device and the network device; when the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; when the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; where the first distance is farther than the second distance, and the third value is greater than the fourth value.

[0121] Optionally, the first information is further configured to indicate a set of candidate retransmission times corresponding to the PDCCH, and the set of candidate retransmission times includes the retransmission times of the PDCCH in the time domain.

[0122] In one example, the retransmission times of the PDCCH in the time domain are related to the service type of the terminal device; when the service type of the terminal device is a latency-sensitive service type, the retransmission times of the PDCCH in the time domain are a fifth value; when the service type of the terminal device is a latency-insensitive service type, the retransmission times of the PDCCH in the time domain are a sixth value; where the fifth value is less than the sixth value.

[0123] In another example, the retransmission times of the PDCCH in the time domain are related to the distance between the terminal device and the network device; when the terminal device is at a third distance from the network device, the retransmission times of the PDCCH in the time domain are a seventh value; when the terminal device is at a fourth distance from the network device, the retransmission times of the PDCCH in the time domain are an eighth value; where the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

[0124] Based on the above embodiments, an embodiment of the present application further provides a terminal device, which is configured to implement as Figure 4The functions of the terminal device in the communication method shown. Refer to Figure 9 As shown, the terminal device 900 includes: a transceiver 901 and a processor 902, where:

[0125] The processor 902 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 902 may further include a hardware chip. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. When implementing the above functions, the processor 902 may be implemented by hardware, or of course, it may also implement the corresponding software by hardware.

[0126] The transceiver 901 and the processor 902 are connected to each other. Optionally, the transceiver 901 and the processor 902 are connected to each other through a bus 904; the bus 904 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 9 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0127] Optionally, the terminal device may further include a memory 903, and the memory 903 is used to store programs, etc. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 903 may include a RAM, and may also include a non-volatile memory, such as at least one disk memory. The processor 902 executes the application program stored in the memory 903 to implement the above functions, so as to implement the communication method as Figure 4 shown.

[0128] Specifically, when the terminal device implements Figure 4 the functions of the terminal device in the communication method shown, it may include:

[0129] The transceiver 901 is used to receive first information from a network device, where the first information is used to indicate a set of carrier candidates occupied by the PDCCH, and the set of carrier candidates includes at least one carrier; the processor 902 is used to blindly detect DCI in the PDCCH on the at least one carrier according to the first information.

[0130] In an alternative embodiment, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a delay-insensitive service type, the number of the at least one carrier is a second value; where the first value is greater than the second value.

[0131] In another alternative embodiment, the number of the at least one carrier is related to the distance between the terminal device and the network device; when the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; when the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; where the first distance is farther than the second distance and the third value is greater than the fourth value.

[0132] Optionally, the first information is further used to indicate a set of candidate retransmission times corresponding to the PDCCH, and the set of candidate retransmission times includes the retransmission times of the PDCCH in the time domain; further, the processor 902 is further used to blindly detect DCI in the PDCCH for each retransmission according to the retransmission times of the PDCCH in the time domain.

[0133] In an example, the retransmission times of the PDCCH in the time domain are related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the retransmission times of the PDCCH in the time domain are a fifth value; when the service type of the terminal device is a delay-insensitive service type, the retransmission times of the PDCCH in the time domain are a sixth value; where the fifth value is less than the sixth value.

[0134] In another example, the number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; when the terminal device is at a third distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is a seventh value; when the terminal device is at a fourth distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is an eighth value; wherein, the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

[0135] Based on the above embodiments, an embodiment of the present application provides a communication system, which may include the network device and the terminal device involved in the above embodiments, etc.

[0136] An embodiment of the present application further provides a computer-readable storage medium, which is used to store a computer program or instruction. When the computer program or instruction is executed by a computer, the computer can implement the communication method provided in the above method embodiment.

[0137] An embodiment of the present application further provides a computer program product, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the communication method provided in the above method embodiment.

[0138] An embodiment of the present application further provides a chip, which is coupled to a memory, and the chip is used to implement the communication method provided in the above method embodiment.

[0139] An embodiment of the present application further provides a chip system, which includes a processor for supporting the above communication device to implement the functions involved above. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the communication device. The chip system may be composed of a chip or may include a chip and other discrete devices.

[0140] It should be noted that in the description of the present application, terms such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order. In the description of the present application, "at least one (kind)" means one (kind) or more (kinds), and more (kinds) means two (kinds) or more than two (kinds).

[0141] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0142] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in Figure 1 one or more of the flows Figure 1 or a plurality of flows and / or blocks

[0143] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that realize the functions specified in Figure 1 one or more of the flows Figure 1 or a plurality of flows and / or blocks

[0144] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in Figure 1 one or more of the flows Figure 1 or a plurality of flows and / or blocks

[0145] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the protection scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A communication method, characterized in that, including: The network device determines first information, where the first information is used to indicate a carrier candidate set occupied by a physical downlink control channel (PDCCH), and the carrier candidate set includes at least one carrier; The network device sends the first information to the terminal device; Wherein, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a delay-insensitive service type, the number of the at least one carrier is a second value; wherein, the first value is greater than the second value.

2. The method according to claim 1, wherein The number of the at least one carrier is related to the distance between the terminal device and the network device; When the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; When the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; Wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

3. The method according to any one of claims 1-2, characterized in that, The first information is further used to indicate a candidate set of repetition transmission times corresponding to the PDCCH, and the candidate set of repetition transmission times includes the repetition transmission times of the PDCCH in the time domain.

4. The method according to claim 3, wherein The repetition transmission times of the PDCCH in the time domain are related to the service type of the terminal device; When the service type of the terminal device is a delay-sensitive service type, the repetition transmission times of the PDCCH in the time domain are a fifth value; When the service type of the terminal device is a delay-insensitive service type, the repetition transmission times of the PDCCH in the time domain are a sixth value; Wherein, the fifth value is less than the sixth value.

5. The method according to claim 3, wherein The repetition transmission times of the PDCCH in the time domain are related to the distance between the terminal device and the network device; When the terminal device is at a third distance from the network device, the repetition transmission times of the PDCCH in the time domain are a seventh value; When the terminal device is at a fourth distance from the network device, the repetition transmission times of the PDCCH in the time domain are an eighth value; Wherein, the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

6. A communication method, characterized in that, including: The terminal device receives first information from the network device, where the first information is used to indicate a carrier candidate set occupied by a physical downlink control channel (PDCCH), and the carrier candidate set includes at least one carrier; The terminal device blindly detects downlink control information (DCI) in the PDCCH on the at least one carrier according to the first information; Wherein, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a delay-insensitive service type, the number of the at least one carrier is a second value; wherein, the first value is greater than the second value.

7. The method according to claim 6, wherein The number of the at least one carrier is related to the distance between the terminal device and the network device; When the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; When the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; Wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

8. The method according to any one of claims 6-7, characterized in that, The first information is further used to indicate a candidate set of repetition transmission times corresponding to the PDCCH, and the candidate set of repetition transmission times includes the repetition transmission times of the PDCCH in the time domain; The method further includes: The terminal device blindly detects the DCI in the PDCCH of each repetition transmission according to the repetition transmission times of the PDCCH in the time domain.

9. The method according to claim 8, characterized in that, The repetition transmission times of the PDCCH in the time domain are related to the service type of the terminal device; When the service type of the terminal device is a delay-sensitive service type, the repetition transmission times of the PDCCH in the time domain is a fifth value; When the service type of the terminal device is a delay-insensitive service type, the repetition transmission times of the PDCCH in the time domain is a sixth value; Wherein, the fifth value is less than the sixth value.

10. The method according to claim 8, wherein The repetition transmission times of the PDCCH in the time domain are related to the distance between the terminal device and the network device; When the terminal device is at a third distance from the network device, the repetition transmission times of the PDCCH in the time domain is a seventh value; When the terminal device is at a fourth distance from the network device, the repetition transmission times of the PDCCH in the time domain is an eighth value; Wherein, the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

11. A communication device, characterized in that, Including: A processing unit, configured to determine first information, where the first information is used to indicate a candidate set of carriers occupied by a physical downlink control channel PDCCH, and the candidate set of carriers includes at least one carrier; A transceiver unit, configured to send the first information to a terminal device; Wherein, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal device is a delay-insensitive service type, the number of the at least one carrier is a second value; wherein, the first value is greater than the second value.

12. The communication device according to claim 11, wherein The number of the at least one carrier is related to the distance between the terminal device and the network device; When the terminal device is at a first distance from the network device, the number of the at least one carrier is a third value; When the terminal device is at a second distance from the network device, the number of the at least one carrier is a fourth value; Wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

13. The communication device according to any one of claims 11-12, characterized in that, The first information is further used to indicate a candidate set of repetition transmission times corresponding to the PDCCH, and the candidate set of repetition transmission times includes the repetition transmission times of the PDCCH in the time domain.

14. The communication device according to claim 13, wherein The repetition transmission times of the PDCCH in the time domain are related to the service type of the terminal device; When the service type of the terminal device is a latency-sensitive service type, the number of repeated transmissions of the PDCCH in the time domain is the fifth value; When the service type of the terminal device is a latency-insensitive service type, the number of repeated transmissions of the PDCCH in the time domain is the sixth value; Wherein, the fifth value is less than the sixth value.

15. The communication device according to claim 13, wherein The number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; When the terminal device is at the third distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is the seventh value; When the terminal device is at the fourth distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is the eighth value; Wherein, the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

16. A communication device, characterized in that, Including: A transceiver unit, configured to receive first information from a network device, where the first information is used to indicate a carrier candidate set occupied by a physical downlink control channel PDCCH, and the carrier candidate set includes at least one carrier; A processing unit, configured to blindly detect downlink control information DCI in the PDCCH on the at least one carrier according to the first information; Wherein, the number of the at least one carrier is related to the service type of the terminal device; when the service type of the terminal device is a latency-sensitive service type, the number of the at least one carrier is the first value; when the service type of the terminal device is a latency-insensitive service type, the number of the at least one carrier is the second value; wherein, the first value is greater than the second value.

17. The communication device according to claim 16, wherein The number of the at least one carrier is related to the distance between the terminal device and the network device; When the terminal device is at the first distance from the network device, the number of the at least one carrier is the third value; When the terminal device is at the second distance from the network device, the number of the at least one carrier is the fourth value; Wherein, the first distance is farther than the second distance, and the third value is greater than the fourth value.

18. The communication device according to any one of claims 16-17, characterized in that, The first information is further used to indicate a repeated transmission number candidate set corresponding to the PDCCH, and the repeated transmission number candidate set includes the number of repeated transmissions of the PDCCH in the time domain; The processing unit is further configured to: Blindly detect DCI in the PDCCH for each repeated transmission according to the number of repeated transmissions of the PDCCH in the time domain.

19. The communication device according to claim 18, wherein The number of repeated transmissions of the PDCCH in the time domain is related to the service type of the terminal device; When the service type of the terminal device is a latency-sensitive service type, the number of repeated transmissions of the PDCCH in the time domain is the fifth value; When the service type of the terminal device is a latency-insensitive service type, the number of repeated transmissions of the PDCCH in the time domain is the sixth value; Wherein, the fifth value is less than the sixth value.

20. The communication device according to claim 18, characterized in that, The number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; When the terminal device is at the third distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is the seventh value; When the terminal device is at a fourth distance from the network device, the number of repeated transmissions of the PDCCH in the time domain is an eighth value; Among them, the third distance is farther than the fourth distance, and the seventh value is greater than the eighth value.

21. A computer-readable storage medium, characterized in that, Including instructions that, when run on a computer, cause the computer to execute the method according to any one of claims 1-5, or execute the method according to any one of claims 6-10.

22. A computer program product, characterized in that, The computer program product is used to store a computer program, and when the computer program is executed by a computer, it causes the computer to execute the method according to any one of claims 1-5, or execute the method according to any one of claims 6-10.

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