WO2021007868A1

WO2021007868A1 - Pdcch blind detection method and related device

Info

Publication number: WO2021007868A1
Application number: PCT/CN2019/096617
Authority: WO
Inventors: 石聪
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2021-01-21
Also published as: CN113243129A; CN113243129B

Abstract

Disclosed in embodiments of the present application are a PDCCH blind detection method and a related device. The method comprises: a terminal monitors indication information from a network device in a first power mode, the indication information being used for indicating the terminal to start blind detection of a PDCCH; if the terminal monitors the indication information, the terminal starts a first timer; and the terminal performs blind detection on the PDCCH in a second power mode within a duration corresponding to the first timer. The adoption of the embodiments of the present application facilitates reducing the power consumption of the terminal and improving the efficiency of data transmission.

Description

Method and related equipment for blind PDCCH detection

Technical field

This application relates to the field of communication technology, and in particular to a method and related equipment for blind PDCCH detection.

Background technique

At present, some communication systems, such as the New Radio Unlicensed (NR-U) system, are based on the Listen Before Talk (LBT) mechanism for data transmission. The LBT mechanism means that the sender needs to first listen to whether the channel is free, and if the channel is free, it can preempt the channel to send data to the receiver. If the channel is occupied, the sender needs to back off for a period of time and listen again until it is heard Data can be sent only when the channel is idle. However, for the receiving end such as the terminal, it is unknown when the transmitting end such as the base station can preempt the channel. If the terminal has been in the state of blindly detecting the Physical Downlink Control Channel (PDCCH) until the PDCCH is blindly detected, It will cause too much power consumption of the terminal.

In order to save power consumption of the terminal, if the terminal is configured with Discontinuous Reception (DRX) parameters, the terminal may periodically wake-up (wake-up) based on the DRX cycle corresponding to the DRX parameter to blindly detect the PDCCH. However, in this mode, if the terminal does not monitor any PDCCH, it may be that the network side has not preempted the channel or the network side has not sent downlink data to the terminal. If the terminal still maintains periodic blind detection of the PDCCH, it will increase unnecessary functions. Moreover, the network side can only seize the channel during the period of the periodic wake-up of the terminal. Otherwise, even if the channel is seized, the network side cannot schedule the terminal. This limits the opportunity for the network side to seize the channel and reduces the data transmission effectiveness.

Summary of the invention

The embodiment of the present application provides a method and related equipment for blind PDCCH detection, which helps reduce terminal power consumption and improve data transmission efficiency.

In the first aspect, an embodiment of the present application provides a method for blindly detecting PDCCH, including:

The terminal monitors the indication information from the network device in the first power mode, where the indication information is used to instruct the terminal to start blind detection of the PDCCH;

If the terminal monitors the indication information, the terminal starts a first timer;

The terminal blindly detects the PDCCH in the second power mode within the time period corresponding to the first timer, and the received power corresponding to the second power mode is higher than the received power corresponding to the first power mode.

In the second aspect, an embodiment of the present application provides a method for blindly detecting PDCCH, including:

If the network device preempts the channel, the network device generates indication information, where the indication information is used to instruct the terminal to start blind detection of the PDCCH;

The network device sends the instruction information to the terminal.

In a third aspect, an embodiment of the present application provides a terminal that has some or all of the functions of the terminal behavior in the foregoing method. For example, the function of the terminal may have some or all of the functions in the embodiments of the present application, or It has the function of independently implementing any of the embodiments in this application. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In a possible design, the terminal includes a processing unit and a communication unit, and the processing unit is configured to support the terminal to perform corresponding functions in the foregoing method. The communication unit is used to support communication between the terminal and other devices. The terminal may further include a storage unit, which is used for coupling with the processing unit and stores program instructions and data necessary for the terminal. Optionally, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.

In the fourth aspect, the embodiments of the present application provide a network device that has some or all of the functions of the network device in the foregoing method. For example, the function of the network device may have some or all of the functions in the embodiments of the present application. The function of may also have the function of independently implementing any of the embodiments in this application. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In a possible design, the network device includes a processing unit and a communication unit, and the processing unit is configured to support the network device to perform corresponding functions in the foregoing method. The communication unit is used to support communication between the network device and other devices. The network device may also include a storage unit, which is used to couple with the processing unit and stores program instructions and data necessary for the network device. Optionally, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.

In a fifth aspect, an embodiment of the present application provides a terminal, including a processor, a memory, a transceiver, and one or more programs, where the one or more programs are stored in the memory and configured by The processor executes, and the program includes instructions for executing steps in any method of the first aspect of the embodiments of the present application.

In a sixth aspect, embodiments of the present application provide a network device, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured by The processor executes, and the program includes instructions for executing steps in any method in the second aspect of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a communication system, which includes the terminal and/or network device of the foregoing aspect. In another possible design, the system may also include other devices that interact with the terminal or network device in the solution provided in the embodiments of the present application.

In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium that stores a computer program that causes a computer to execute the method described in the first aspect of the embodiments of the present application Some or all of the steps.

In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program causes a computer to execute the method described in the second aspect of the embodiment of the present application Some or all of the steps.

In a tenth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute Part or all of the steps described in the method of the first aspect of the application embodiment. The computer program product may be a software installation package.

In an eleventh aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute such as Part or all of the steps described in the method of the second aspect of the embodiments of the present application. The computer program product may be a software installation package.

In the solution provided by the embodiment of the present application, the terminal can monitor the indication information from the network device in the low-power mode, and start the timer when the indication information is monitored, and then blindly detect the PDCCH through the normal power mode to achieve PDCCH detection. Instead of always using the normal power mode for blind PDCCH detection, this helps reduce terminal power consumption and improve data transmission efficiency.

Description of the drawings

Hereinafter, the drawings needed to be used in the description of the embodiments or the prior art will be introduced.

FIG. 1 is an architecture diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flowchart of a method for blind PDCCH detection provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of another method for blind PDCCH detection provided by an embodiment of the present application;

4 is a schematic diagram of interaction of a method for blind PDCCH detection provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a working scenario of a receiver provided by an embodiment of the present application;

FIG. 6 is an interactive schematic diagram of another method for blind PDCCH detection provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a terminal provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a network device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another terminal provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another network device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings.

It can be understood that the technical solution of the present application can be specifically applied to a communication system that performs data transmission based on a Listen Before Talk (LBT, also known as Listen Before Talk) mechanism, such as New Radio Unauthorized (New Radio Unlicensed, NR-U) system, long-term evolution (Long Term Evolution, abbreviation: LTE) system, fifth-generation mobile communication (the 5th Generation, 5G) system, etc.

Please refer to FIG. 1, which is an architecture diagram of a communication system provided by this application. As shown in Figure 1, taking the sending end as a network device and the receiving end as a terminal as an example, the communication system may include: one or more network devices 101, and one or more terminals 102, only one is shown in Figure 1 Network equipment 101 and a terminal 102. Data transmission can be performed between the network device 101 and the terminal 102.

Taking the communication system as the NR-U system as an example, the NR system can work in unlicensed spectrum, including the following work scenarios: carrier aggregation scenario, dual-connection work scenario, independent work scenario, NR single cell scenario, etc. Among them, in the carrier aggregation scenario, the primary cell (PCell) can work in the licensed spectrum, and the secondary cell (SCell) can be aggregated to work in the unlicensed spectrum through carrier aggregation; in the dual connectivity scenario, the PCell can work in the LTE licensed spectrum , The primary and secondary cell (PScell) can work in the NR unlicensed spectrum; in the independent working scenario, NR can work as an independent cell in the unlicensed spectrum; in the NR single cell scenario, the uplink (UpLink, UL) can work In licensed spectrum, DownLink (DL) can work in unlicensed spectrum. When the working band of NR-U is unlicensed spectrum such as 5GHz unlicensed spectrum or 6GHz unlicensed spectrum, it is necessary to ensure fairness with other systems that are already working on these unlicensed spectrums, such as WiFi systems, that is, NR -U's impact on systems that have been deployed on unlicensed spectrum, such as WiFi systems, cannot exceed the impact between these systems, such as WiFi systems. Thus the system can use the LBT mechanism for data transmission.

In a communication system based on the LBT mechanism for data transmission, for the receiving end such as the terminal, it is unknown when the transmitting end such as the network device can preempt the channel. If the terminal has been in the state of blind PDCCH detection until the PDCCH is blindly detected, Or the periodic blind detection of the PDCCH based on the DRX cycle will cause the terminal to consume more power. Moreover, this method of blind PDCCH detection based on the DRX cycle will cause the network side to only seize the channel during the period of the terminal's periodic wake-up, otherwise the network side will not be able to schedule the terminal even if the channel is seized, which limits The opportunity for the network side to seize the channel reduces the efficiency of data transmission.

Therefore, in this application, the sending end, such as a network device, can instruct the terminal to blindly detect the PDCCH by sending instruction information to the receiving end, such as a terminal, for example, sending instruction information to the terminal after seizing the channel; so that the terminal can pass the first power The (power consumption) mode is lower than the normal power monitoring indication information, and after the indication information is monitored, the timer can be started to perform blind PDCCH detection in the second power mode, such as the normal power mode, so that the terminal can perform a blind detection according to the network device Instructs to perform blind PDCCH detection, which reduces the power consumption of the terminal and helps increase the chance of the network side to seize the signal, thereby improving the efficiency of data transmission.

In this application, the network device may be an entity on the network side that is used to send or receive information, for example, it may be a base station. The base station may be used to communicate with one or more terminals, or may be used to communicate with one or more A base station with some terminal functions performs communication (for example, communication between a macro base station and a micro base station, such as an access point). The base station can be the Base Transceiver Station (BTS) in the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or the Long Term Evolution (LTE) system The evolutional base station (Evolutional Node B, eNB) may also be the base station gNB in the 5G system, the NR system, etc., which are not listed here. Alternatively, the network device 101 may also be a transmission point (TP), an access point (Access Point, AP), a transceiver point (transmission and receiver point, TRP), a relay device, a central unit (Central Unit, CU). ), or other network equipment with base station functions, etc., which are not limited in this application.

In this application, a terminal is a device with a communication function, for example, it may be a vehicle-mounted device, a wearable device, a handheld device (such as a smart phone), and so on. The terminal can also be called other names, such as user equipment (User Equipment, UE), user unit, mobile station (mobile station), mobile unit (mobile unit), terminal equipment, etc., which are not limited in this application.

It can be understood that the communication system shown in FIG. 1 is only used as an example and does not constitute a limitation to the application. Those of ordinary skill in the art will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by this application For similar technical issues, the same applies.

This application discloses a method for blindly detecting PDCCH and related equipment, which helps reduce terminal power consumption and improve data transmission efficiency. A detailed description is given below in conjunction with the drawings.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a method for blindly detecting PDCCH according to an embodiment of the present application. The method of this embodiment can be applied to the aforementioned communication system, and can be specifically applied to the receiving end such as the aforementioned terminal. As shown in FIG. 2, the method includes:

201. The terminal monitors indication information from a network device in a first power mode, where the indication information may be used to instruct the terminal to start blind detection of the PDCCH.

Wherein, the first power mode may refer to low power (power consumption) or zero power mode, that is, lower power than normal power mode. In the first power mode, the terminal can monitor whether the indication information sent by the network device is received, so as to determine whether to start blind PDCCH detection according to the indication information. Optionally, the indication information may be PDCCH information or a sequence signal such as a demodulation reference signal (Demodulation Reference Signal, DMRS).

It can be understood that in other embodiments, the indication information may also be called other names, such as channel occupation indication, channel occupation information, occupation indication, etc., which are not limited in this application.

202. If the terminal monitors the indication information, the terminal starts a first timer.

The first timer may be pre-configured, for example, configured by a radio resource control (Radio Resource Control, RRC) layer; or, the first timer may be indicated by the indication information, such as the indication information The duration of the first timer may be carried, and the terminal may use the duration of the timer included in the indication information as the duration of the first timer; or, the first timer may be obtained by a semi-static configuration of a network device, for example Configure according to the preset time interval, or determine the configuration frequency according to the amount of data to be transmitted or the amount of data (for example, when the amount of data to be transmitted exceeds the preset first amount of data, the frequency of configuring the first timer can be increased, When the data volume of the data to be transmitted is lower than the preset second data volume, the configuration frequency of the first timer can be reduced; otherwise, the configuration is performed according to the preset configuration frequency, the first data volume is greater than the second data volume) and so on. The configuration of the first timer is not limited in this application.

In some embodiments, the terminal may determine to blindly detect the PDCCH when it monitors the indication information. Thereby, the first timer can be started to perform blind PDCCH detection based on the first timer.

Or, in some embodiments, before the terminal starts the preset first timer, the terminal may determine whether to blindly detect the PDCCH based on the monitored indication information. For example, if the terminal monitors the indication information, it can further detect whether the indication information is indication information for itself, and if it is determined that the indication information is for itself, the terminal may determine to blindly detect the PDCCH. Thereby, the first timer can be started to perform blind PDCCH detection based on the first timer.

For example, the indication information may carry a terminal identification. After the terminal monitors the indication information, it can detect whether the terminal identification carried in the indication information matches its own identification. If it matches, it can be determined that the indication information is the indication information for itself, and then it can be determined that the PDCCH is blindly detected. Thereby, the first timer can be started to perform blind PDCCH detection based on the first timer.

For another example, one or a group of terminals can be pre-configured on a certain narrowband frequency domain resource, and each terminal can be configured with an orthogonal sequence. The indication information may be a sequence, or the indication information may include a sequence. Therefore, after the terminal monitors the indication information, if it detects that the indication information is orthogonal to the sequence configured for the terminal, it can determine that the indication information is the indication information for itself, and then can determine the blind detection of the PDCCH. Thereby, the first timer can be started to perform blind PDCCH detection based on the first timer.

In some embodiments, the indication information may also be used to indicate that the network has preempted the channel; and/or, the indication information may also include information about the time the network device occupies the channel, such as the length of time the network device occupies the channel, and the channel preemption time. Start time position and/or end time position of preemption channel, etc. Optionally, the terminal may also determine the start time of the first timer according to the time information of the channel occupied by the network device; and/or, the terminal may also determine the first timer according to the time information of the channel occupied by the network device The length of time.

For example, the indication information may include the start time position of the preemption channel, that is, the start time of channel occupation, the terminal may determine the start time of the first timer according to the start time, for example, determine the start time to be the same as the start time; For example, the indication information may include the occupied duration of the channel, and the terminal may determine the duration of the first timer according to the occupied duration, for example, determine the duration of the first timer to be the same as the occupied duration, and so on.

In some embodiments, the instruction information may further include startup control information, and the startup control information may be used to instruct the terminal to start the first timer. If the instruction information includes the startup control information, the terminal may start the first timer. Or, the startup control information can be used to indicate whether the terminal starts the first timer, and the terminal can restart the first timer when the startup control message indicates to start the first timer. If the indication information does not include startup control information (the startup control information is used to instruct the terminal to start the first timer), or the startup control information indicates that the terminal does not start the first timer, the terminal may not start the first timer. Timer.

203. The terminal blindly detects the PDCCH in the second power mode within the duration corresponding to the first timer.

The second power mode may refer to a normal power mode, and the received power corresponding to the second power mode is higher than the received power corresponding to the first power mode. After the blind detection of the PDCCH is determined, the first timer can be started to perform the blind detection of the PDCCH. When performing blind PDCCH detection, the terminal performs blind PDCCH detection in the second power mode, so as to improve the reliability of blind PDCCH detection.

It can be understood that the terminal blindly detects the PDCCH in the second power mode within the time period corresponding to the first timer, which may mean that the terminal blindly detects the PDCCH in the second power mode during the running of the first timer until the first timer is running. If the PDCCH is detected or received within the timer duration, the blind PDCCH detection may no longer be performed. Further, if the PDCCH is blindly detected within the duration of the first timer, the second power mode may be turned off, or the second power mode may be turned off after the first timer expires.

In some embodiments, if the PDCCH is not detected after the first timer expires, the terminal may stop blind PDCCH detection and turn off the second power mode; or, the terminal may further combine other methods to blindly detect the PDCCH, and use this The second power mode performs blind inspection.

In some embodiments, the first power mode and the second power mode may correspond to different receivers. For example, the terminal is configured with a first receiver and a second receiver, the first receiver works in a first power mode, and the second receiver works in a second power mode, that is, the received power of the first receiver The received power corresponding to the first power mode may be the same, and the received power of the second receiver may be the same as the received power corresponding to the second power mode. Furthermore, the terminal can monitor the indication information in the first power mode through the first receiver (the second receiver can be in the off state or not working at this time), and can monitor the indication information through the second receiver The machine realizes blind detection of the PDCCH in the second power mode (that is, turning on the second receiver or controlling the second receiver to be in working state).

Or, in some embodiments, the first power mode and the second power mode may correspond to different working modes of the same receiver, that is, the receiver configured in the terminal can switch the power mode according to different scenarios to reduce the power of the terminal. Consumption, and ensure transmission reliability. For example, as mentioned above, the terminal can control the receiver to work in the first power mode to monitor the indication information, and after monitoring the indication information, control the receiver to work in the second power mode to achieve blind PDCCH detection.

In some embodiments, the terminal may also receive configuration information from the network device, and the configuration information may include frequency domain position information of the indication information, and the frequency domain position information is used to indicate the frequency domain position of receiving the indication information. When the terminal monitors the indication information, it can monitor the indication information from the network device in the first power mode at the frequency domain position indicated by the frequency domain position information. Optionally, the configuration information may also include time-domain location information of the indication information. The time-domain location information may be used to indicate the time-domain location where the indication information is received. For example, the time-domain location information may include time period, time period, etc. . Then, when the terminal monitors the indication information, it can also monitor at the position indicated by the time domain location information, which helps to reduce the monitoring overhead and improve the monitoring efficiency. If the time domain location information is not received, or the time domain location information indicates that the indication information is always monitored, the terminal may always monitor the indication information, for example, always monitor the indication information at the frequency domain location.

In some embodiments, the configuration information may further include any one or more of the following: bandwidth part (Bandwidth Part, BWP) configuration information, search space configuration information, control resource set CORESET location information, and so on. Wherein, the BWP configuration information may include control channel parameters and data channel parameters, etc.; the search space (searchspace) configuration information may be used to indicate the location of the search space, for example, it may include information such as the starting OFDM symbol number of the PDCCH; the CORESET may Including the frequency domain location information and time domain location information of the PDCCH, such as the frequency band occupied in the frequency domain and the number of OFDM symbols occupied in the time domain.

In some embodiments, the configuration information may also carry a terminal identification, and after receiving the configuration information, the terminal may detect whether the terminal identification carried in the configuration information matches its own identification. If it matches, it can be determined that the configuration information is configuration information for itself. Otherwise, the configuration information can be discarded.

Wherein, the configuration information may be obtained through pre-configuration; or, the configuration information may be obtained through semi-static configuration of the network device, such as configuring according to a preset time interval, or determining the configuration according to the amount of data to be transmitted or the amount of data Frequency to configure and so on. The configuration method of the configuration information is not limited in this application.

It can be understood that the frequency domain location information, time domain location information, BWP configuration information, search space configuration information, and CORESET location information can be carried in one piece of configuration information or multiple pieces of configuration information, such as frequency domain position. The information and/or time domain location information is carried in one piece of configuration information, and the BWP configuration information, search space configuration information, and CORESET location information are carried in another piece of configuration information, etc., which are not limited in this application.

In some embodiments, the terminal is configured with a Discontinuous Reception (DRX) parameter, and the DRX parameter may include the information of the first timer. For example, the DRX parameter may include the duration of a timer such as drx-ondurationTimer, and the terminal may use the drx-ondurationTimer as the first timer.

Alternatively, in some embodiments, the terminal may be configured with DRX parameters, and the DRX parameters may include information about the second timer. If the terminal does not blindly detect the PDCCH within the time period corresponding to the first timer, the terminal can blindly detect the PDCCH according to the information of the second timer. For example, the information of the second timer may include information of one or more timers such as start time, duration, etc., for example, include any one or more of the following timers: DRX duration timer such as drx-onDurationTimer, DRX static Timers such as drx-InactivityTimer, DRX downlink retransmission timers such as drx-RetransmissionTimerDL, DRX uplink retransmission timers such as drx-RetransmissionTimerUL, and contention resolution timers such as ra-ContentionResolutionTimer, if PDCCH is not detected after the first timer expires, then The terminal can blindly detect the PDCCH in the second power mode based on the information of the second timer, that is, the one or more timers.

Wherein, the DRX parameter may be configured by the network device for the terminal through the configuration information, or may be configured for the terminal through other information or methods, which is not limited in this application.

In this embodiment, the terminal can monitor the indication information from the network device in the low-power mode, and start a timer when the indication information is monitored, and then blindly detect the PDCCH through the normal power mode during the running of the timer, so that the terminal can Perform blind PDCCH detection according to the instructions of the network equipment, which reduces the power consumption of the terminal, helps increase the chance of the network side to seize the signal, thereby improving the efficiency of data transmission, and can realize the PDCCH detection by switching the power mode. This further reduces terminal power consumption.

Please refer to FIG. 3, which is a schematic flowchart of another method for blind PDCCH detection according to an embodiment of the present application. The method in this embodiment can be specifically applied to the network device at the sending end such as the above. As shown in FIG. 3, the method includes:

301. If a network device preempts a channel, the network device generates indication information, which is used to instruct the terminal to start blind detection of the PDCCH.

In some embodiments, the network device may also send configuration information to the terminal device, and the configuration information may include frequency domain position information of the indication information, and the frequency domain position information may be used to indicate the frequency domain position of receiving the indication information. Then the network device can send the indication information to the terminal at the frequency domain position. Optionally, the configuration information may also include time-domain location information of the indication information. The time-domain location information may be used to indicate the time-domain location where the indication information is received. For example, the time-domain location information may include time period, time period, etc. . Then the network device can send the indication information to the terminal at the time domain location. The terminal receives the configuration information, so that the terminal monitors the indication information according to the frequency domain location and/or time domain location information, so as to reduce monitoring overhead and improve monitoring efficiency.

In some embodiments, the configuration information may further include any one or more of the following: BWP configuration information, search space configuration information, CORESET location information, and so on. Wherein, the BWP configuration information may include control channel parameters and data channel parameters, etc.; the search space configuration information may be used to indicate the location of the search space, for example, it may include information such as the starting OFDM symbol number of the PDCCH; the CORESET may include the PDCCH Frequency domain position information and time domain position information, such as information such as the frequency band occupied in the frequency domain and the number of OFDM symbols occupied in the time domain.

The configuration information may be pre-configured; or, the configuration information may be semi-statically configured by the network device and sent to the terminal, such as sending to the terminal at a preset time interval, or according to the amount of data to be transmitted Or the amount of data determines the configuration frequency and so on. This application does not limit the configuration and sending mode of the configuration information. Optionally, the configuration information may also carry a terminal identification, so that after receiving the configuration information, the terminal can determine whether the configuration information is for itself by detecting whether the terminal identification carried in the configuration information matches its own identification Configuration information.

302. The network device sends the instruction information to the terminal.

In some embodiments, the indication information may include a terminal identifier, so that the terminal can determine whether to perform PDCCH blind detection according to the terminal identifier. Optionally, the indication information may be PDCCH information or sequence signals such as DMRS and so on.

In some embodiments, the indication information may also include the duration of the first timer. Alternatively, the network device can also semi-statically configure to obtain the information of the first timer, such as the duration of the first timer, etc.; or, the network device can also configure to obtain the information of the first timer in other ways, which is not done in this application limited.

In some embodiments, the indication information may also be used to indicate that the network has preempted the channel; and/or, the indication information may also include information about the time the network device occupies the channel, such as the length of time the network device occupies the channel, and the channel preemption time. The start time position and/or the end time position of the preemption channel, etc., are used to instruct the terminal to blindly detect the PDCCH.

In some embodiments, the instruction information may further include startup control information, and the startup control information may be used to instruct the terminal to start the first timer; or, the startup control information may be used to indicate whether the terminal starts the first timer.

It can be understood that, in an alternative embodiment, the indication information can also be pre-configured, so that the network device can directly send the indication information to the terminal after it has preempted the channel or when it determines to instruct the terminal to blindly check the PDCCH, and There is no need to send it after generation.

In the embodiment of the present application, the network device may send the indication information for indicating blind PDCCH detection to the terminal after the channel is preempted, so that the terminal can monitor the indication information through the terminal, so that the PDCCH can be performed when the indication information is monitored. The detection makes it unnecessary for the network side to seize the channel only during the periodic wake-up period of the terminal, which helps increase the chance of the network side to seize the channel, thereby improving the efficiency of data transmission and helping to reduce the terminal Power consumption.

Please refer to FIG. 4, which is a schematic diagram of interaction of a method for blind PDCCH detection provided by an embodiment of the present application. In this embodiment, the terminal is configured with a first receiver and a second receiver, the received power of the first receiver is the same as the received power corresponding to the first power mode, and the received power of the second receiver is the same as that of the second receiver. The received power corresponding to the power modes is the same, and the received power corresponding to the second power mode is higher than the received power corresponding to the first power mode. For example, the first receiver can be a low-power or zero-power receiver, which can be used to monitor indication information; the second receiver can be a normal-power receiver, which can be used to blindly detect PDCCH or receive user data. As shown in Figure 4, the method includes:

401. The network device sends configuration information to the terminal, where the configuration information includes frequency domain location information of the indication information.

Optionally, the configuration information may include configuration information of the first receiver and configuration information of the second receiver. The configuration information of the first receiver and the configuration information of the second receiver can be carried in the same configuration information and sent to the terminal, or can be carried in different configuration information and sent to the terminal, which is not limited in this application.

For example, the configuration information of the first receiver may include frequency domain position information of the indication information, and the frequency domain position information may be used to indicate the frequency domain position of receiving the indication information. Optionally, the first receiver configuration information may further include time domain position information of the indication information, and the time domain position information may be used to indicate the time domain position at which the indication information is received. For example, the time domain position information may include time period, Time period and so on. The configuration information of the second receiver may include BWP configuration information, searchspace configuration information, CORESET location information, etc., which are not described here.

The terminal can receive configuration information from the network device, including the first configuration information and the second configuration information, and can determine the location to receive the indication information according to the configuration information, such as the first configuration information, for example, determine the indication information according to the frequency domain location information According to the time domain position information, the time domain position for receiving the indication information is determined. Optionally, the terminal may also determine the position of the PDCCH according to the configuration information, such as the second configuration information, for example, determine the position of the PDCCH according to the BWP configuration information, searchspace configuration information, and CORESET position information.

402. The network device sends instruction information to the terminal at the frequency domain location, where the instruction information is used to instruct the terminal to start blind detection of the PDCCH.

In some embodiments, the network device may send indication information to the terminal at the frequency domain position indicated by the frequency domain position information, so as to instruct the terminal to perform PDCCH blind detection. For example, after the network device preempts the channel based on the LBT mechanism, it can send indication information to the terminal at the frequency domain position. Optionally, the network device may also combine the time domain location information to send indication information to the terminal at the time domain location indicated by the time domain location information and the frequency domain location.

403. The terminal monitors the indication information from the network device in the first power mode through the first receiver at the frequency domain position indicated by the frequency domain position information.

The terminal can control the first receiver to work (turn on), so as to monitor the indication information through the first power mode to save power consumption of the terminal. The terminal may specifically monitor the indication information based on the configuration information such as the first configuration information, for example, to monitor the indication information at the frequency domain position. If the first configuration information includes time domain location information, the terminal may also combine the time domain location information to monitor the indication information at the time domain location indicated by the time domain location information, thereby reducing monitoring overhead and improving monitoring efficiency. If the first configuration information does not include the time domain location information, or the time domain location information indicates that the indication information is always monitored, the terminal may always monitor the indication information at the frequency domain location.

In this embodiment, the first receiver may always be in an on state to keep monitoring the indication information. Since the terminal has been monitoring the indication information, the network can listen to the channel at any time according to whether it wants to transmit data to the terminal. If the network side listens to obtain the channel, it can send the indication information to the terminal, which will not restrict the network side from seizing the channel Opportunities to help improve the efficiency of data transmission.

404. If the indication information is monitored, the terminal starts a first timer.

Optionally, after the terminal monitors the indication information, it can determine whether to blindly detect the PDCCH; or, the terminal may further determine whether to blindly detect the PDCCH based on the monitored indication information. For example, the terminal may detect whether the terminal identification carried in the indication information is It matches with its own identifier, and when it matches, it is determined that the indication information is the indication information for itself, and then the blind PDCCH can be determined. After determining the blind PDCCH detection, the terminal can start the first timer to perform blind PDCCH detection based on the first timer.

405. The terminal blindly detects the PDCCH in the second power mode through the second receiver within the duration corresponding to the first timer.

When the terminal performs blind PDCCH detection, the second receiver can be turned on to implement blind PDCCH detection through the second power mode. It can be understood that when the network device has no data to send to the terminal, the terminal can turn off the normal power receiver, that is, the second receiver, thereby saving power consumption of the terminal. In other words, the second receiver may be turned on only when it is determined that the network device wants to dispatch the terminal.

Optionally, the indication information may also include the duration of the first timer, so that the terminal may use the duration included in the indication information as the duration of the first timer; or, the indication information may also include the time that the network device occupies the channel Information, so that the terminal can determine the duration of the first timer according to the time information of the occupied channel; or (the duration) of the first timer can be pre-configured, such as configured by the RRC layer; or, the first timing The device (the duration) may be obtained through semi-static configuration or configured through other methods, etc., which will not be repeated here.

If the PDCCH is blindly detected within the duration of the first timer, the terminal may turn off the second receiver, or may turn off the second receiver after the first timer expires, so as to save power consumption of the terminal.

Further, if the PDCCH has not been detected after the first timer expires, the terminal may stop blind PDCCH detection and shut down the second receiver; or, if the PDCCH has not been detected after the first timer expires, the terminal may further combine The PDCCH is blindly detected in other ways, and blind detection is performed by the second receiver.

Optionally, the terminal may be configured with DRX parameters, and the terminal may also perform blind PDCCH detection in combination with the DRX parameters. The DRX parameter may be configured by the network device for the terminal, or configured by the RRC layer, or configured in other ways, which is not limited in this application. For example, the configuration information may also include DRX parameters, such as time information of one or more timers such as start time, duration, etc., and the one or more timers may include DRX duration timers such as drx-onDurationTimer, DRX static Timers such as drx-InactivityTimer, DRX retransmission timer (such as uplink retransmission timer such as drx-RetransmissionTimerUL, downlink retransmission timer such as drx-RetransmissionTimerDL), contention resolution timer such as ra-ContentionResolutionTimer, HARQ round trip time timer ( For example, an uplink HARQ round trip time timer such as drx-HARQ-RTT-TimerUL, a downlink HARQ round trip time timer such as drx-HARQ-RTT-Timer (DL) and so on. It can be understood that the DRX parameter may also be carried in other information and sent to the terminal. For example, some or all of the DRX parameters may also be carried in the indication information, such as indicating the duration of drx-ondurationTimer through the indication information. If the indication information indicates the DRX parameter, and the DRX parameter is configured in another manner, the DRX parameter indicated by the indication information may cover the DRX parameter configured in other manners such as the RRC layer.

Furthermore, the terminal can also perform blind PDCCH detection according to the one or more timers. For example, the terminal can use the drx-ondurationTimer as the first timer to perform blind PDCCH detection based on the drx-onDurationTimer; if the PDCCH is not blindly detected within the drx-onDurationTimer duration, that is, the drx-ondurationTimer does not blindly detect the PDCCH during the timeout period, Then the terminal can stop blind PDCCH detection and turn off the second receiver, or the terminal can perform PDCCH blind detection according to any one or more of drx-InactivityTimer, drx-RetransmissionTimerUL, drx-RetransmissionTimerDL, and ra-ContentionResolutionTimer through the second receiver. Check. For another example, the first timer is a timer other than the DRX parameters. If the terminal does not blindly detect the PDCCH within the first timer duration, the terminal can stop the blind PDCCH detection and turn off the second receiver, or the terminal can also PDCCH blind detection is performed by the second receiver according to any one or more of drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerUL, drx-RetransmissionTimerDL, and ra-ContentionResolutionTimer, so as to improve the success rate and reliability of the PDCCH blind detection.

When performing blind PDCCH detection based on any one or more of the timers such as drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerUL, drx-RetransmissionTimerDL, ra-ContentionResolutionTimer, etc., any one of them can be started immediately after the first timer expires Or multiple timers (when there are multiple timers, the multiple timers can be started in a preset order); or, any one or more timers can be started according to the configuration information or instructions, such as the configuration information Or the instruction information carries the start time of each timer; or, any one or more timers can also be started according to a certain rule, which is not limited in this application.

For example, if the drx-onDurationTimer is started, the terminal may determine the time to start the drx-onDurationTimer according to whether it is currently in a short DRX cycle or a long DRX cycle. If Short DRX Cycle is used, and the current subframe satisfies [(SFN×10)+subframe number]modulo(drx-ShortCycle)=(drx-StartOffset)modulo(drx-ShortCycle); Or, if LongDRX is used Cycle, and the current subframe satisfies [(SFN×10)+subframe number] modulo(drx-LongCycle)=drx-StartOffset; then the drx-onDurationTimer is started at a time after the drx-SlotOffset slots at the beginning of the current subframe. For another example, if the drx-InactivityTimer is started, the terminal can start the drx-InactivityTimer when it receives a PDCCH indicating the initial downlink or uplink transmission. For another example, if the drx-RetransmissionTimerDL is started, the terminal can receive a PDCCH indicating downlink transmission, or receive a Media Access Control (MAC) protocol data unit (Protocol Data Unit) on the configured downlink authorization resource. , PDU) message, the terminal can start the drx-HARQ-RTT-TimerDL corresponding to the HARQ process after completing the transmission of the hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) process feedback for this downlink transmission, and stop at the same time The drx-RetransmissionTimerDL corresponding to the HARQ process; if the timer drx-HARQ-RTT-TimerDL corresponding to a certain HARQ of the terminal times out, and the downlink data transmitted by this HARQ process is not successfully decoded, the terminal can start the HARQ process corresponding drx-RetransmissionTimerDL. For another example, if drx-RetransmissionTimerUL is started, the terminal can receive a PDCCH indicating uplink transmission, or send a MAC PDU on the configured uplink authorization resource, then the terminal can start the HARQ process after completing this uplink transmission. The drx-HARQ-RTT-TimerUL corresponding to the HARQ process is stopped, and the drx-RetransmissionTimerUL corresponding to the HARQ process is stopped; if the timer drx-HARQ-RTT-TimerUL corresponding to a certain HARQ of the terminal expires, the terminal starts the drx-RetransmissionTimerUL corresponding to the HARQ process .

Optionally, if the terminal detects the PDCCH during the operation of the drx-ondurationTimer or the first timer, the terminal may also start the relevant DRX timer according to the above-mentioned start method of other DRX timers, which will not be described here.

In some embodiments, the indication information may also include the type of the LBT mechanism adopted by the network device, that is, the LBT type. Optionally, the indication information may also include the priority of channel access. So that the terminal determines the first timer according to the LBT type and/or channel access priority.

For example, four channel access mechanisms (category) are defined in NR-U, namely LBT type, including Category 1-4. Category 1 is a direct transmission mechanism, which means that the sender, such as a network device, can transmit quickly after a switching gap. The switching gap refers to the conversion time of the received transmission, and the typical value is no more than 16 us. Category 2 is an LBT mechanism that does not require random back-off. This mechanism means that the time to listen to the channel is determined. Generally, the time to listen to the channel is relatively short, such as 25us. Category 3 is a random back-off LBT mechanism (fixed contention window). This mechanism means that in the LBT process, the sender randomly selects a random value in the contention window to determine the time to listen to the channel. Category 4 is a random back-off LBT mechanism (the contention window is not fixed). This mechanism means that in the LBT process, the sender randomly selects a random value in the contention window to determine the time to listen to the channel. The contention window is available. changing. For category 4, the channel access priority (Channel Access Priority Class) is shown in the following table:

Wherein, m _p and perform channel access interception channel to time, a network device such as the base station needs to perform channel sensing time Td, where _{Td = 16us + m p × 9us} . CW _min,p and CW _{max,p are} related to the random listening channel time during channel access. When the base station listens to Td time and the channel is idle, it needs to listen to the channel again N times, each with a duration of 9 us. Where N can be a random number from 0 to CW _p , and CW _min,p ≤CW _p ≤CW _max,p . T _mcot,p can be the longest time that the network device occupies the channel after it has seized the channel. It is related to the channel priority adopted by the base station. For example, if the priority is 1, the channel can be occupied for 2ms at most after the channel is successfully intercepted. Therefore, the terminal can determine the first timer according to the LBT type and/or channel access priority. For example, the terminal may determine the length of the first timer according to the time information of the occupied channel corresponding to the LBT type and/or channel access priority, such as the longest time of occupying the channel (maximum channel occupied time), such as The longest time of the occupied channel is used as the duration of the first timer; and/or the start time of the first timer is determined according to the time information of the occupied channel, and/or the first timer is determined according to the time information of the occupied channel The stop time of the timer and so on.

For example, as shown in FIG. 5, the network device can configure low-power or zero-power receiver parameters for the terminal by sending configuration information to the terminal, and the terminal can detect the instruction information sent by the network device according to the configuration information. As shown in the horizontal area in Figure 5, the terminal can always detect the indication information through a low-power or zero-power receiver, that is, the first receiver. Since the terminal has been monitoring the indication information, the network device can transmit data to the terminal according to whether Channel listening at any time. If the network monitors and obtains the channel, it can send instructions to the terminal. Further, if the terminal receives the instruction information, it can decide whether to start the first timer according to the instruction information. If the first timer is started, the terminal can pass the normal power receiver, that is, the second timer within the duration of the first timer. The receiver blindly detects the PDCCH, as shown in the slanted area in Figure 5. If the first timer expires, the terminal can turn off the normal power receiver, thereby stopping the blind detection of the PDCCH, and achieve the power saving effect.

In this embodiment, the network device can send configuration information indicating information to the terminal, and after seizing the channel, send indicating information indicating blind PDCCH detection to the terminal, so that the terminal can pass the first reception based on the configuration information. The machine works in the first power mode to monitor the indication information, and starts the corresponding timer when the indication information is monitored, and then controls the second receiver to work in the second power mode to detect the PDCCH during the running of the timer. This eliminates the need for the network side to seize the channel in a fixed period of time, such as the periodic wake-up period of the terminal, which does not limit the opportunity for the network side to seize the channel, so that the network side can seize the channel at any time, which improves The efficiency of data transmission, and the terminal can realize the blind detection of PDCCH by controlling different receivers according to the instructions of the network equipment, so that the terminal can blindly detect the PDCCH as little as possible, thereby reducing the power consumption of the terminal.

Please refer to FIG. 6, which is a schematic diagram of interaction of another method for blind PDCCH detection according to an embodiment of the present application. In this embodiment, the terminal is equipped with a receiver that can work in different power modes, such as a first power mode and a second power mode, and the received power corresponding to the second power mode is higher than the first power mode. The received power corresponding to a power mode, for example, the first power mode may be a low power or zero power mode, and the second power mode may be a normal power mode. As shown in Figure 6, the method includes:

601. The network device sends configuration information to the terminal, where the configuration information includes frequency domain location information of the indication information.

Wherein, the frequency domain position information can be used to indicate the frequency domain position of receiving indication information. Optionally, the configuration information may also include time-domain location information of the indication information. The time-domain location information may be used to indicate the time-domain location where the indication information is received. For example, the time-domain location information may include time period, time period, etc. . Further optionally, the configuration information may also include BWP configuration information, searchspace configuration information, CORESET location information, etc., which are not described here.

The terminal can receive the configuration information from the network device, and can determine the position to receive the indication information according to the configuration information, for example, determine the frequency domain position of the indication information according to the frequency domain position information, and determine the receiver of the indication information according to the time domain position information. Time domain location, etc. Optionally, the terminal may also determine the position of the PDCCH according to the configuration information, for example, determine the position of the PDCCH according to the BWP configuration information, searchspace configuration information, and CORESET position information.

602. The network device sends instruction information to the terminal at the frequency domain position, where the instruction information is used to instruct the terminal to start blind PDCCH detection.

603. The terminal monitors the indication information from the network device in the first power mode at the frequency domain position indicated by the frequency domain position information.

The terminal may control the receiver to work in the first power mode, and monitor the indication information based on the configuration information, for example, monitor the indication information in the first power mode and at the frequency domain position, so as to save power consumption of the terminal. If the configuration information includes time domain location information, the terminal can also combine the time domain location information to monitor the indication information at the time domain location indicated by the time domain location information, thereby reducing monitoring overhead and improving monitoring efficiency. If the configuration information does not include the time domain location information, or the time domain location information indicates that the indication information is always monitored, the terminal may always monitor the indication information at the frequency domain location.

604. If the indication information is monitored, the terminal starts a first timer.

In some embodiments, the terminal can determine whether to blindly detect the PDCCH after listening to the indication information; or, the terminal can further determine whether to blindly detect the PDCCH based on the monitored indication information, for example, the terminal can detect the terminal carried by the indication information Identify whether the identifier matches its own identifier, and determine that the indication information is the indication information for itself when matching, and then determine the blind detection of the PDCCH. After determining the blind PDCCH detection, the terminal can start the first timer to perform blind PDCCH detection based on the first timer.

605. The terminal blindly detects the PDCCH in the second power mode within the duration corresponding to the first timer.

When the terminal is performing blind PDCCH detection, it can control the receiver to switch from the first power mode to the second power mode, that is, turn off the first power mode, turn on the second power mode, and perform blind PDCCH detection through the second power mode.

If the PDCCH is blindly detected within the duration of the first timer, the terminal may turn off the second power mode, or may turn off the second power mode after the first timer expires to save power consumption of the terminal. After turning off the second power mode, the terminal can turn on the first power mode, that is, control the receiver to work in the first power mode to continue to monitor the indication information.

If the PDCCH is not detected after the first timer expires, the terminal can stop blind PDCCH detection, turn off the second power mode, and turn on the first power mode; or, if the PDCCH has not been detected after the first timer expires, the terminal It can be further combined with other methods to blindly detect the PDCCH, and perform the blind detection in the second power mode.

Optionally, if the terminal is configured with DRX parameters, the terminal can also perform blind PDCCH detection in combination with the DRX parameters. The DRX parameter may be configured by the network device for the terminal, or configured by the RRC layer, or configured in other ways, which is not limited in this application.

For example, in 5G NR, the network device can configure DRX parameters for the terminal. For example, DRX parameters can include: drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerUL, drx-RetransmissionTimerDL, ra-ContentionResolutionTimer, drx-HARQ-RTT- The duration of timers such as TimerUL, drx-HARQ-RTT-TimerDL, etc. Then the terminal can use the drx-onDurationTimer as the first timer to perform blind PDCCH detection based on the drx-onDurationTimer; optionally, if the PDCCH is not blindly detected within the drx-onDurationTimer duration, that is, the drx-onDurationTimer timeout is not blindly detected When the PDCCH is reached, the terminal can stop blindly detecting the PDCCH and turn off the second power mode; or, the terminal can further use the second power mode according to any one of drx-InactivityTimer, drx-RetransmissionTimerUL, drx-RetransmissionTimerDL, and ra-ContentionResolutionTimer Or multiple blind PDCCH detection. Alternatively, the first timer may be a timer other than the DRX parameters. If the terminal does not blindly detect the PDCCH within the first timer duration, the terminal may stop blindly detecting the PDCCH and turn off the second power mode, or if the terminal is in If the PDCCH is not blindly detected within the first timer duration, the terminal can also perform PDCCH blind detection according to any one or more of drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerUL, drx-RetransmissionTimerDL, and ra-ContentionResolutionTimer in the second power mode. To improve the success rate and reliability of blind PDCCH detection. When performing blind PDCCH detection based on any one or more of drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerUL, drx-RetransmissionTimerDL, and ra-ContentionResolutionTimer, any one or more of them can be started immediately after the first timer expires Timer; or, the any one or more timers can be started according to the instructions of the configuration information or instruction information, for example, the configuration information or the instruction information carries the start time of each timer; or, the any one or more timers The device can also be started according to certain rules. For details, please refer to the relevant description of the embodiment shown in FIG. 4, which will not be repeated here. Further optionally, at a time other than the start time of any one or more timers, the terminal may control the receiver to work in the first power mode.

Optionally, the indication information may also include the type of the LBT mechanism adopted by the network device, that is, the LBT type. Optionally, the indication information may also include the priority of channel access. So that the terminal determines the first timer according to the LBT type and/or channel access priority, which is not repeated here.

In this embodiment, the network device can send the configuration information indicating the information to the terminal, and send the indicating information for indicating the blind detection of the PDCCH to the terminal after seizing the channel, so that the terminal can control the operation of the receiver based on the configuration information. Monitor the indication information in the first power mode, and start the corresponding timer when the indication information is monitored, and then control the receiver to work in the second power mode for PDCCH detection during the running of the timer, so that the network side does not need to A fixed period of time, such as the terminal periodically wake-up, to seize the channel, which will not limit the chance of the network side to seize the channel, and the terminal can control the receiver to work in different power modes according to the instructions of the network device To achieve blind PDCCH detection, thereby reducing terminal power consumption, improving data transmission efficiency, and helping to reduce terminal costs.

It can be understood that the above method embodiments are all examples of the method for blind PDCCH detection of the present application, and the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, please refer to the relevant information of other embodiments. description.

Refer to FIG. 7, which is a schematic structural diagram of a terminal provided in an embodiment of the present application. As shown in FIG. 7, the terminal 700 may include: a processor 710, a memory 720, a communication interface 730, and one or more programs 721, where the one or more programs 721 are stored in the memory 720, and Is configured to be executed by the processor 710, and the program includes instructions for executing the following steps:

Monitor the indication information from the network device in the first power mode, where the indication information is used to instruct the terminal to start blind detection of the PDCCH;

If the indication information is monitored, start the first timer;

Within the time period corresponding to the first timer, blindly detect the PDCCH in the second power mode, and the received power corresponding to the second power mode is higher than the received power corresponding to the first power mode.

Optionally, the terminal is configured with a first receiver and a second receiver, the received power of the first receiver is the same as the received power corresponding to the first power mode, and the received power of the second receiver The received power corresponding to the second power mode is the same;

When the instruction information from the network device is monitored in the first power mode, the instructions in the program are specifically used to perform the following operations:

Monitoring the instruction information from the network device in the first power mode by the first receiver;

When the PDCCH is blindly detected in the second power mode, the instructions in the program are specifically used to perform the following operations:

Blind detection of the PDCCH in the second power mode by the second receiver.

Optionally, the instructions in the program are also used to perform the following operations:

Receiving configuration information from the network device, where the configuration information includes frequency domain location information for receiving the indication information; when monitoring the indication information from the network device in the first power mode, the instructions in the program are specifically used Do the following:

At the frequency domain position indicated by the frequency domain position information, the indication information from the network device is monitored in the first power mode.

Optionally, the configuration information further includes any one or more of the following: time domain location information for receiving the indication information, BWP configuration information, search space configuration information, and control resource set CORESET location information.

Optionally, the indication information includes time information of the channel occupied by the network device.

Optionally, the instructions in the program are also used to perform the following operations: determine the start time of the first timer according to the time information of the channel occupied by the network device; and/or,

Determine the duration of the first timer according to the time information of the channel occupied by the network device.

Optionally, the instruction information includes startup control information, and the startup control information is used to indicate whether the terminal starts the first timer; when the first timer is started, the instructions in the program are specifically used to execute the following operating:

If the start control message instructs the terminal to start the first timer, start the first timer.

Optionally, the indication information includes the duration of the first timer, or the duration of the first timer is pre-configured.

Optionally, the terminal is configured with discontinuous reception DRX parameters, and the DRX parameters include information about the first timer.

Optionally, the terminal is configured with discontinuous reception DRX parameters, and the DRX parameters include information about a second timer; within the duration corresponding to the first timer, after blindly detecting the PDCCH in the second power mode, The instructions in the program are also used to perform the following operations:

If the PDCCH is not blindly detected within the duration corresponding to the first timer, the PDCCH is blindly detected according to the information of the second timer.

Optionally, before starting the preset first timer, the instructions in the program are further used to perform the following operations:

Determining whether to start the first timer according to the instruction information;

The indication information includes a terminal identifier; when the preset first timer is started, the instructions in the program are specifically used to perform the following operations:

If the identifier of the terminal matches the terminal identifier included in the indication information, start the first timer.

Optionally, after blindly detecting the PDCCH in the second power mode within the duration corresponding to the first timer, the instructions in the program are further used to perform the following operations:

If the first timer expires, or if the PDCCH is blindly detected within the duration of the first timer, the second power mode is turned off.

Optionally, the indication information is PDCCH information or sequence signals.

Refer to FIG. 8, which is a schematic structural diagram of a network device provided by an embodiment of the present application. As shown in FIG. 8, the network device 800 may include: a processor 810, a memory 820, a communication interface 830, and one or more programs 821, where the one or more programs 821 are stored in the memory 820, And is configured to be executed by the processor 810, and the program includes instructions for executing the following steps;

If the channel is preempted, indication information is generated, the indication information is used to instruct the terminal to start blind PDCCH detection;

Sending the instruction information to the terminal.

Sending configuration information to the terminal, where the configuration information includes frequency domain location information for receiving the indication information;

When sending the instruction information to the terminal, the instructions in the program are specifically used to perform the following operations:

Sending the indication information to the terminal at the frequency domain position indicated by the frequency domain position information.

Optionally, the configuration information further includes any one or more of the following: time domain location information, BWP configuration information, search space configuration information, and CORESET location information for receiving the indication information.

Optionally, the indication information includes any one or more of the following information: time information of the channel occupied by the network device, the duration of the first timer, and a terminal identifier.

The foregoing mainly introduces the solution of the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that, in order to implement the above-mentioned functions, the terminal and the network device include hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiment of the present application may divide the terminal and the network device into functional units according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated unit can be realized in the form of hardware or software program module. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

Please refer to FIG. 9, which shows another possible structural schematic diagram of the terminal involved in the foregoing embodiment. Referring to FIG. 9, the terminal 900 may include: a processing unit 901 and a communication unit 902. Among them, these units can perform the corresponding functions of the terminal in the foregoing method example. The processing unit 901 is used to control and manage the actions of the terminal. For example, the processing unit 901 is used to support the terminal to execute steps 201 to 203 in FIG. 2, 403 to 405 in FIG. 4, 603 to 605 in FIG. 6, and/ Or other processes used in the techniques described herein. The communication unit 902 may be used to support communication between the terminal and other devices, for example, communication with a network device. The terminal may also include a storage unit 903 for storing program codes and data of the network device.

The processing unit 901 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 902 may be a transceiver, a transceiver circuit, a radio frequency chip, etc., and the storage unit 903 may be a memory.

For example, the processing unit 901 is configured to monitor the indication information from the network device in the first power mode through the communication unit 902, and the indication information is used to instruct the terminal to start blind detection of the PDCCH; the processing unit 901 is also configured to monitor the Indicating information, start the first timer; the processing unit 901 is further configured to blindly detect the PDCCH in the second power mode through the communication unit 902 within the duration corresponding to the first timer, and the second power mode corresponds to The received power of is higher than the received power corresponding to the first power mode.

The communication unit 902 may be specifically configured to monitor the indication information from the network device in the first power mode through the first receiver;

The communication unit 902 may be specifically configured to blindly detect the PDCCH in the second power mode through the second receiver.

Optionally, the communication unit 902 may also be configured to receive configuration information from the network device, where the configuration information includes frequency domain location information for receiving the indication information;

The communication unit 902 may be specifically configured to monitor the indication information from the network device in the first power mode at the frequency domain position indicated by the frequency domain position information.

Optionally, the processing unit 901 may be further configured to determine the start time of the first timer according to the time information of the channel occupied by the network device; and/or, according to the time information of the channel occupied by the network device, Determine the duration of the first timer.

Optionally, the indication information includes startup control information, and the startup control information is used to indicate whether the terminal starts the first timer;

The processing unit 901 may be specifically configured to start the first timer when the start control message instructs the terminal to start the first timer.

Optionally, the terminal is configured with discontinuous reception DRX parameters, and the DRX parameters include information about the second timer;

The processing unit 901 may also be configured to blindly detect the PDCCH through the communication unit 902 according to the information of the second timer when the terminal does not blindly detect the PDCCH within the time period corresponding to the first timer.

Optionally, the processing unit 901 may also be configured to determine whether to start the first timer according to the instruction information.

Optionally, the indication information includes a terminal identifier;

The processing unit 901 may be specifically configured to start the first timer when the terminal identifier matches the terminal identifier included in the indication information.

Optionally, the processing unit 901 may also be configured to turn off the second power mode when the first timer expires, or when the PDCCH is blindly detected within the duration of the first timer.

When the processing unit 901 is a processor, the communication unit 902 is a communication interface, and the storage unit 903 is a memory, the terminal involved in the embodiment of the present application may be the terminal shown in FIG. 7.

Optionally, the terminal may implement part or all of the steps executed by the terminal in the method in the embodiment shown in FIG. 2 to FIG. 6 through the above-mentioned unit. It should be understood that the embodiment of the present application is an apparatus embodiment corresponding to the method embodiment, and the description of the method embodiment is also applicable to the embodiment of the present application, and will not be repeated here.

Please refer to FIG. 10, which shows another possible structural schematic diagram of the network device involved in the foregoing embodiment. Referring to FIG. 10, the network device 100 may include: a processing unit 1001 and a communication unit 1002. Among them, these units can perform the corresponding functions of the network device in the foregoing method example. The processing unit 1001 is used to control and manage the actions of the network device. For example, the processing unit 1001 is used to support the network device to execute steps 301 to 302 in FIG. 3, 401 to 402 in FIG. 4, and 601 to 602 in FIG. 6, And/or other processes used in the techniques described herein. The communication unit 1002 may be used to support communication between a network device and other devices, for example, communication with a terminal. The network device may also include a storage unit 1003 for storing program codes and data of the network device.

The processing unit 1001 may be a processor or a controller, the communication unit 1002 may be a transceiver, a transceiver circuit, a radio frequency chip, etc., and the storage unit 1003 may be a memory.

For example, the processing unit 1001 is configured to generate indication information when the channel is preempted, and the indication information is used to instruct the terminal to start blind PDCCH detection;

The communication unit 1002 is configured to send the instruction information to the terminal.

Optionally, the communication unit 1002 may be further configured to send configuration information to the terminal, where the configuration information includes frequency domain location information for receiving the indication information;

The communication unit 1002 may be specifically configured to send the indication information to the terminal at the frequency domain position indicated by the frequency domain position information.

When the processing unit 1001 is a processor, the communication unit 1002 is a communication interface, and the storage unit 1003 is a memory, the terminal involved in the embodiment of the present application may be the network device shown in FIG. 8.

Optionally, the network device may implement part or all of the steps performed by the network device in the method in the embodiments shown in FIG. 2 to FIG. 6 through the foregoing unit. It should be understood that the embodiment of the present application is an apparatus embodiment corresponding to the method embodiment, and the description of the method embodiment is also applicable to the embodiment of the present application, and will not be repeated here.

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

This application also provides a communication system, which includes the aforementioned terminal and/or network device. Optionally, the system may also include other devices that interact with the foregoing network elements in the solution provided in the embodiment of the present application. The network device and/or the terminal can perform part or all of the steps in the method in the embodiment shown in FIG. 2 to FIG. 6. For details, reference may be made to the relevant description of the above embodiment, which is not repeated here.

The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the terminal in the above method embodiment Some or all of the steps described.

The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the network Part or all of the steps described by the device.

The embodiments of the present application also provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the method embodiments described above Part or all of the steps described in the terminal. The computer program product may be a software installation package.

The embodiments of the present application also provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the network Part or all of the steps described by the device. The computer program product may be a software installation package.

The steps of the method or algorithm described in combination with the disclosure of the present application can be implemented in hardware, or implemented by a processor executing software instructions. Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), and erasable programmable read-only memory ( Erasable Programmable ROM (EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in a communication device such as a terminal and network equipment. Of course, the processor and the storage medium may also exist as discrete components in the communication device.

It can be understood that the first, second, third, and various numerical numbers involved in this specification are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application.

It can be understood that the term "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist. , There are three cases of B alone. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

It can be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application. The implementation process constitutes any limitation.

Those skilled in the art should be aware that in one or more of the foregoing examples, the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (for example, coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a Digital Video Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)) )Wait.

Claims

A method for blindly detecting physical downlink control channel PDCCH, which is characterized in that it includes:

The terminal monitors the indication information from the network device in the first power mode, where the indication information is used to instruct the terminal to start blind detection of the PDCCH;

If the terminal monitors the indication information, the terminal starts a first timer;

The terminal blindly detects the PDCCH in the second power mode within the time period corresponding to the first timer, and the received power corresponding to the second power mode is higher than the received power corresponding to the first power mode.
The method according to claim 1, wherein the terminal is configured with a first receiver and a second receiver, and the received power of the first receiver is the same as the received power corresponding to the first power mode, The received power of the second receiver is the same as the received power corresponding to the second power mode;

The terminal monitoring the indication information from the network device in the first power mode includes:

The terminal monitors the indication information from the network device in the first power mode through the first receiver;

The blind detection of the PDCCH by the terminal in the second power mode includes:

The terminal blindly detects the PDCCH in the second power mode through the second receiver.
The method according to claim 1 or 2, wherein the method further comprises:

The terminal receives configuration information from the network device, the configuration information includes frequency domain location information for receiving the indication information; the terminal monitors the indication information from the network device in the first power mode, including:

The terminal monitors the indication information from the network device in the first power mode at the frequency domain position indicated by the frequency domain position information.
The method according to claim 3, wherein the configuration information further includes any one or more of the following: time domain location information for receiving the indication information, bandwidth part BWP configuration information, search space configuration information, and control Resource set CORESET location information.
The method according to claim 1 or 2, wherein the indication information includes time information of the channel occupied by the network device.
The method of claim 5, wherein the method further comprises:

The terminal determines the start time of the first timer according to the time information of the channel occupied by the network device; and/or,

The terminal determines the duration of the first timer according to the time information of the channel occupied by the network device.
The method according to claim 1 or 2, wherein the indication information includes startup control information, and the startup control information is used to indicate whether the terminal starts the first timer; the terminal starts the first timer ,include:

If the start control message instructs the terminal to start the first timer, the terminal starts the first timer.
The method according to claim 1 or 2, wherein the indication information includes the duration of the first timer, or the duration of the first timer is pre-configured.
The method according to claim 1 or 2, wherein the terminal is configured with discontinuous reception DRX parameters, and the DRX parameters include information of the first timer.
The method according to claim 1 or 2, wherein the terminal is configured with discontinuous reception DRX parameters, and the DRX parameters include information about a second timer; in the terminal, the first timer corresponds to Within the period of time, after blindly detecting the PDCCH in the second power mode, the method further includes:

If the terminal does not blindly detect the PDCCH within the time period corresponding to the first timer, the terminal blindly detects the PDCCH according to the information of the second timer.
The method according to claim 1 or 2, characterized in that, before the terminal starts a preset first timer, the method further comprises:

The terminal determines whether to start the first timer according to the instruction information;

The indication information includes a terminal identifier; the terminal starts a preset first timer, including:

If the identifier of the terminal matches the terminal identifier included in the indication information, the terminal starts the first timer.
The method according to claim 1 or 2, characterized in that, after the terminal blindly detects the PDCCH in the second power mode within the duration corresponding to the first timer, the method further comprises:

If the first timer times out, or if the PDCCH is blindly detected within the duration of the first timer, the terminal turns off the second power mode.
The method according to claim 1 or 2, wherein the indication information is PDCCH information or sequence signal.
A method for blindly detecting physical downlink control channel PDCCH, which is characterized in that it comprises:

If the network device preempts the channel, the network device generates indication information, where the indication information is used to instruct the terminal to start blind detection of the PDCCH;

The network device sends the instruction information to the terminal.
The method of claim 14, wherein the method further comprises:

Sending, by the network device, configuration information to the terminal, the configuration information including frequency domain location information for receiving the indication information;

The sending of the instruction information by the network device to the terminal includes:

The network device sends the indication information to the terminal at the frequency domain position indicated by the frequency domain position information.
The method according to claim 15, wherein the configuration information further includes any one or more of the following: time domain location information for receiving the indication information, bandwidth part BWP configuration information, search space configuration information, and control Resource set CORESET location information.
The method according to any one of claims 14-16, wherein the indication information includes any one or more of the following information: time information of the channel occupied by the network device, and the first timer The duration and terminal identification.
The method according to any one of claims 14-16, wherein the indication information is PDCCH information or a sequence signal.
A terminal, characterized by comprising a processing unit and a communication unit;

The processing unit is configured to monitor the indication information from the network device in the first power mode through the communication unit, and the indication information is used to instruct the terminal to start blind PDCCH detection;

The processing unit is further configured to start a first timer when the indication information is monitored;

The processing unit is further configured to blindly detect the PDCCH in a second power mode through the communication unit within the time period corresponding to the first timer, and the received power corresponding to the second power mode is higher than that of the first power mode. The received power corresponding to the power mode.
A network device, characterized by comprising a processing unit and a communication unit;

The processing unit is configured to generate indication information when the channel is preempted, and the indication information is used to instruct the terminal to start blind PDCCH detection;

The communication unit is configured to send the instruction information to the terminal.
A terminal is characterized by comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, and The program includes instructions for performing the steps in the method according to any one of claims 1-13.
A network device is characterized by comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, The program includes instructions for performing the steps in the method according to any one of claims 14-18.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program that enables a computer to execute the method according to any one of claims 1-13.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program that enables a computer to execute the method according to any one of claims 14-18.