CN113243129B

CN113243129B - Method and related equipment for blind detection of PDCCH

Info

Publication number: CN113243129B
Application number: CN201980083471.4A
Authority: CN
Inventors: 石聪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2022-10-25
Anticipated expiration: 2039-07-18
Also published as: WO2021007868A1; CN113243129A

Abstract

The embodiment of the application discloses a method for blind detection of a PDCCH and related equipment, comprising the following steps: the terminal monitors indication information from network equipment in a first power mode, wherein the indication information is used for indicating the terminal to start blind detection of the PDCCH; if the terminal monitors the indication information, the terminal starts a first timer; and the terminal blindly detects the PDCCH in a second power mode within the time length corresponding to the first timer. By adopting the embodiment of the application, the power consumption of the terminal can be reduced, and the data transmission efficiency can be improved.

Description

Method and related equipment for blind detection of PDCCH

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method for blind detection of a PDCCH and a related device.

Background

Currently, some communication systems, such as New Radio Unlicensed (NR-U) systems, are based on Listen Before Transmit (LBT) mechanism for data transmission. The LBT mechanism means that a sending end needs to firstly monitor whether a channel is idle, if the channel is idle, the channel can be preempted to send data to a receiving end, and if the channel is in an occupied state, the sending end needs to back for a period of time and then monitors, and the data can not be sent until the channel is monitored to be idle. However, for a receiving end such as a terminal, it is unknown when a transmitting end such as a base station can seize a Channel, and if the terminal is in a state of blind detection on a Physical Downlink Control Channel (PDCCH) until the PDCCH is blind detected, power consumption of the terminal may be too large.

In order to save power consumption of the terminal, if the terminal is configured with a Discontinuous Reception (DRX) parameter, the terminal may periodically wake up (wake-up) to blindly detect the PDCCH based on a DRX cycle corresponding to the DRX parameter. However, in this manner, if the terminal does not monitor any PDCCH, it may be that the network side does not seize a channel or the network side does not send downlink data to the terminal, and if the terminal still keeps periodic blind detection of the PDCCH, unnecessary power consumption is increased; in addition, the network side can only preempt the channel in the time period of the periodic wake-up of the terminal, otherwise, the network side does not have a slave scheduling terminal even if the channel is preempted, so that the opportunity of the network side for preempting the channel is limited, and the efficiency of data transmission is reduced.

Disclosure of Invention

The embodiment of the application provides a method for blind detection of a PDCCH and related equipment, which are beneficial to reducing power consumption of a terminal and improving data transmission efficiency.

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

the terminal monitors indication information from network equipment in a first power mode, wherein the indication information is 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 blindly detects the PDCCH in a second power mode within the time length corresponding to the first timer, wherein the receiving power corresponding to the second power mode is higher than that corresponding to the first power mode.

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

if the network equipment occupies the channel, the network equipment generates indication information, and the indication information is used for indicating the terminal to start blind detection of the PDCCH;

and the network equipment sends the indication information to a terminal.

In a third aspect, an embodiment of the present application provides a terminal, where the terminal has a function of implementing part or all of the terminal behaviors in the foregoing method, for example, the function of the terminal may have a function in some or all of the embodiments in the present application, or may have a function of implementing any of the embodiments in the present application separately. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In a possible design, the terminal includes a processing unit and a communication unit, the processing unit being configured to enable the terminal to perform the respective functions in the above-described method. The communication unit is used for supporting communication between the terminal and other equipment. The terminal may further comprise a storage unit for coupling with the processing unit, which stores program instructions and data, etc. necessary for the terminal. Alternatively, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.

In a fourth aspect, the present application provides a network device, where the network device has some or all of the functions for implementing the behaviors of the network device in the foregoing method, for example, the functions of the network device may have the functions in some or all of the embodiments in the present application, or may have the functions of implementing any of the embodiments in the present application separately. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In a possible design, the network device comprises a processing unit and a communication unit, the processing unit being configured to support the network device to perform the respective functions of the above-described method. The communication unit is used for supporting communication between the network equipment and other equipment. The network device may also include a storage unit for coupling with the processing unit that stores program instructions and data and the like necessary for the network device. Alternatively, 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, embodiments of the present application provide 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 to be executed by the processor, and the program includes instructions for performing the steps of any of the methods 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, where the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for performing steps in any of the methods of the second aspect of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a communication system, where the system includes the terminal and/or the network device in the foregoing aspect. In another possible design, the system may further include other devices interacting with the terminal or the network device in the solution provided in this embodiment.

In an eighth aspect, the present application provides a computer-readable storage medium storing a computer program, where the computer program makes a computer perform part or all of the steps described in the method of the first aspect of the present application.

In a ninth aspect, embodiments of the present application provide a computer-readable storage medium, which stores a computer program, and the computer program causes a computer to execute some or all of the steps described in the method of the second aspect of the embodiments of the present application.

In a tenth aspect, embodiments of the present application provide a computer program product, where the computer program product comprises a non-transitory computer-readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps as described in the method of the first aspect of embodiments of the present application. The computer program product may be a software installation package.

In an eleventh aspect, embodiments of the present application provide a computer program product, where the computer program product comprises a non-transitory computer-readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps as described in the method of the second aspect of embodiments of the present application. The computer program product may be a software installation package.

In the scheme provided by the embodiment of the application, the terminal can monitor the indication information from the network equipment through the low-power mode, and start the timer when monitoring the indication information, so as to realize the detection of the PDCCH through the normal power mode blind detection of the PDCCH, instead of using the normal power mode for PDCCH blind detection all the time, which is favorable for reducing the power consumption of the terminal and improving the data transmission efficiency.

Drawings

Reference will now be made to the drawings which are used in describing embodiments or prior art.

Fig. 1 is an architecture diagram of a communication system according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a method for blind detection of a PDCCH according to an embodiment of the present disclosure;

fig. 3 is a flowchart illustrating another method for blind detection of a PDCCH according to an embodiment of the present application;

fig. 4 is an interactive schematic diagram of a method for blind detection of a PDCCH according to an embodiment of the present application;

fig. 5 is a schematic diagram of a receiver operating scenario according to an embodiment of the present application;

fig. 6 is an interaction diagram of another method for blind PDCCH detection according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application;

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

fig. 10 is a schematic structural diagram of another network device according to an embodiment of the present application.

Detailed Description

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

It can be understood that the technical solution of the present application may be specifically applied to a communication system that performs data transmission based on Listen Before Talk (LBT), such as a new radio Unlicensed (NR-U) system, a Long Term Evolution (LTE) system, a fifth generation mobile communication (the 5th generation, 5g) system, and the like.

Fig. 1 is an architecture diagram of a communication system according to the present application. As shown in fig. 1, taking a sending end as a network device and a 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 network device 101 and one terminal 102 being shown in fig. 1. Data transmission is possible between the network device 101 and the terminal 102.

Taking the communication system as an NR-U system as an example, the NR system may operate in an unlicensed spectrum, and includes the following operating scenarios: a carrier aggregation scenario, a dual connectivity working scenario, an independent working scenario, an NR single cell scenario, etc. In a carrier aggregation scene, a primary cell (PCell) can work in a licensed frequency spectrum, and a secondary cell (SCell) can work in an unlicensed frequency spectrum in an aggregation manner; in a dual-connection working scene, a PCell can work in an LTE authorized frequency spectrum, and a primary and secondary cell (PScell) can work in an NR unauthorized frequency spectrum; under an independent working scene, the NR can work in an unauthorized frequency spectrum as an independent cell; in an NR single cell scenario, an UpLink (UpLink, UL) may operate in a licensed spectrum and a DownLink (DownLink, DL) may operate in an unlicensed spectrum. When the operating frequency Band (Band) of the NR-U is an unlicensed spectrum, such as a 5GHz unlicensed spectrum or a 6GHz unlicensed spectrum, fairness with other systems already operating on the unlicensed spectrum, such as WiFi systems, needs to be ensured, that is, the effect of the NR-U on systems already deployed on the unlicensed spectrum, such as WiFi systems, cannot exceed the effect of the NR-U on the systems already deployed on the unlicensed spectrum, such as WiFi systems. So that the system can use LBT mechanism for data transmission.

In a communication system for data transmission based on an LBT mechanism, for a receiving end such as a terminal, it is unknown when a transmitting end such as a network can preempt a channel, and if the terminal is in a state of blind detection on a PDCCH until the PDCCH is blind detected, or periodically blind detection on the basis of a DRX cycle, power consumption of the terminal is large. Moreover, the mode of periodically and blindly detecting the PDCCH based on the DRX cycle may cause the network side to seize the channel only in the time period of the terminal periodic wake-up, otherwise, the network side does not have a secondary scheduling terminal even if the network side seizes the channel, which limits the opportunity of the network side to seize the channel and reduces the efficiency of data transmission.

Therefore, in the application, a sending end, such as a network device, can send indication information to a receiving end, such as a terminal, to indicate the terminal to perform blind detection on the PDCCH, for example, send the indication information to the terminal after seizing a channel; therefore, the terminal can monitor the indication information through the first power (power consumption) mode, namely, the indication information is lower than the normal power, and after the indication information is monitored, the timer can be started to carry out PDCCH blind test in the second power mode, such as the normal power mode, so that the terminal can carry out PDCCH blind test according to the indication of the network equipment, the power consumption of the terminal is reduced, the opportunity of preempting signals by a network side is increased, and the efficiency of data transmission is improved.

In this application, a network device may be an entity used to send or receive information on a network side, for example, a base station, and the base station may be configured to communicate with one or more terminals, and may also be configured to communicate with one or more base stations having partial terminal functions (for example, communication between a macro base station and a micro base station, such as an access point). The Base Station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, an evolved Node B (eNB) in a Long Term Evolution (LTE) system, a Base Station gNB in a 5G system or an NR system, and the like, which are not listed here. Alternatively, the network device 101 may also be a Transmission Point (TP), an Access Point (AP), a Transmission and Reception Point (TRP), a relay device, a Central Unit (CU), or other network devices with a base station function, and the like, which is not limited in this application.

In the present application, a terminal is a device with a communication function, and may be, for example, an in-vehicle device, a wearable device, a handheld device (e.g., a smartphone), and the like. The terminal may also be called other names, such as User Equipment (UE), a subscriber Unit (UE), a mobile station (mobile station), a mobile unit (mobile unit), a terminal device, and the like, which is not limited in this application.

It is to be understood that the communication system shown in fig. 1 is only an example, and does not constitute a limitation to the present application, and as the network architecture evolves and new service scenarios emerge, the technical solutions provided in the present application are also applicable to similar technical problems.

The application discloses a method for blindly detecting a PDCCH and related equipment, which are beneficial to reducing power consumption of a terminal and improving data transmission efficiency. The following detailed description is made with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for blind detection of a PDCCH according to an embodiment of the present disclosure. The method of this embodiment can be applied to the above-mentioned communication system, and can be specifically applied to the receiving end in the above-mentioned terminal, as shown in fig. 2, the method includes:

201. the terminal monitors indication information from the network equipment in the first power mode, and the indication information can be used for indicating the terminal to start blind detection of the PDCCH.

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

It is understood that, in other embodiments, the indication information may also be called other names, such as a channel occupancy indication, channel occupancy information, occupancy indication, and the like, and the present application is not limited thereto.

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

The first timer may be obtained by pre-configuration, for example, configured by a Radio Resource Control (RRC) layer; alternatively, the first timer may be indicated by the indication information, for example, the indication information may carry a duration of the first timer, and the terminal may use a timer duration included in the indication information as the duration of the first timer; or, the first timer may be obtained by semi-static configuration of the network device, for example, the first timer is configured according to a preset time interval, and the configuration frequency is determined according to the quantity of the data to be transmitted or the data amount (for example, when the data amount of the data to be transmitted exceeds a preset first data amount, the configuration frequency of the first timer may be increased, and when the data amount of the data to be transmitted is lower than a preset second data amount, the configuration frequency of the first timer may be decreased, otherwise, the first timer is configured according to the preset configuration frequency, and the first data amount is larger than the second data amount), and the like. The configuration of the first timer is not limited in this application.

In some embodiments, the terminal may determine to perform blind PDCCH when it monitors the indication information. Therefore, a first timer can be started, and PDCCH blind detection can be carried out based on the first timer.

Alternatively, in some embodiments, before the terminal starts a preset first timer, the terminal may determine whether to blind-detect the PDCCH based on the monitored indication information. For example, if the terminal monitors the indication information, it may 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. Therefore, the first timer can be started, and the PDCCH blind detection is carried out based on the first timer.

For example, the indication information may carry a terminal identifier, and after monitoring the indication information, the terminal may detect whether the terminal identifier carried by the indication information matches its own identifier. If the indication information is matched with the PDCCH, the indication information can be determined to be the indication information aiming at the PDCCH, and the PDCCH can be determined to be detected in a blind mode. Therefore, a first timer can be started, and PDCCH blind detection can be carried out based on the first timer.

For another example, one or a group of terminals may be configured on a certain narrowband frequency domain resource in advance, and each terminal may 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 the indication information is detected to be orthogonal to the sequence configured for the terminal, the indication information can be determined to be the indication information aiming at the terminal, and further the PDCCH can be determined to be detected in a blind mode. Therefore, a first timer can be started, and PDCCH blind detection can be carried out 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 further include time information of occupying the channel by the network device, such as an occupation duration of the channel by the network device, a start time position of the channel by the network device, and/or an end time position of the channel by the network device. Optionally, the terminal may further determine the starting time of the first timer according to the time information of the channel occupied by the network device; and/or the terminal can also determine the duration of the first timer according to the time information of the channel occupied by the network equipment.

For example, the indication information may include a start time position of preempting the channel, that is, a start time of channel occupation, and 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 another example, the indication information may include an 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 indication information may further include start control information, the start control information may be used to instruct the terminal to start the first timer, and if the indication information includes the start control information, the terminal may start the first timer; or, the start control message may be used to indicate whether the terminal starts the first timer, and the terminal may restart the first timer when the start control message indicates that the first timer is started. The terminal may not start the first timer if the indication information does not include start control information (the start control information is used in case of instructing the terminal to start the first timer), or the start control information instructs the terminal not to start the first timer.

203. And the terminal blindly detects the PDCCH in a second power mode within the time length corresponding to the first timer.

The second power mode may be 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 PDCCH is determined to be blind-detected, a first timer can be started to carry out PDCCH blind-detection. When the PDCCH blind detection is carried out, the terminal carries out the PDCCH blind detection in a second power mode so as to improve the reliability of the PDCCH blind detection.

It can be understood that the blind detection of the PDCCH in the second power mode by the terminal within the time duration corresponding to the first timer may refer to the blind detection of the PDCCH in the second power mode by the terminal during the operation of the first timer, and the blind detection of the PDCCH may not be performed any more until the PDCCH is detected or received within the time duration of the first timer. Further, if the PDCCH is detected in a blind manner 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 times out.

In some embodiments, if the first timer expires without detecting the PDCCH, the terminal may stop blindly detecting the PDCCH and may turn off the second power mode; alternatively, the terminal may further perform blind detection on the PDCCH in combination with other manners and perform blind detection in the second power mode.

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 operates in a first power mode, and the second receiver operates in a second power mode, that is, the received power of the first receiver may be the same as the received power corresponding to the first power mode, and the received power of the second receiver may be the same as the received power corresponding to the second power mode. The terminal may monitor the indication information in a first power mode through the first receiver (at this time, the second receiver may be in an off state or an inactive state), and may perform blind detection on the PDCCH in a second power mode (that is, turning on the second receiver or controlling the second receiver to be in an active state) through the second receiver after monitoring the indication information.

Or, in some embodiments, the first power mode and the second power mode may correspond to different operating modes of the same receiver, that is, the receiver configured in the terminal may switch the power modes according to different scenarios to achieve reduction of power consumption of the terminal and ensure transmission reliability. For example, as described above, the terminal may control the receiver to operate in the first power mode to monitor the indication information, and may control the receiver to operate in the second power mode after monitoring the indication information, so as to implement PDCCH blind detection.

In some embodiments, the terminal may further receive configuration information from the network device, and the configuration information may include frequency domain location information indicating a frequency domain location where the indication information is received. When monitoring the indication information, the terminal may 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 further include time domain position information of the indication information, and the time domain position information may be used to indicate a time domain position for receiving the indication information, for example, the time domain position information may include a time period, and the like. The terminal may also monitor at the position indicated by the time domain position information when monitoring the indication information, which is helpful to reduce monitoring overhead and improve monitoring efficiency. If the time domain position information is not received or the time domain position information indicates to monitor the indication information all the time, the terminal may monitor the indication information all the time, for example, monitor the indication information all the time at the frequency domain position.

In some embodiments, the configuration information may also include any one or more of: bandwidth Part (BWP) configuration information, search space configuration information, and control resource set CORESET location information, and the like. Wherein, the BWP configuration information may include control channel parameters, data channel parameters, and the like; the search space (searchspace) configuration information may be used to indicate a location of a search space, for example, may include information such as a starting OFDM symbol number of a PDCCH; the CORESET may include frequency domain location information and time domain location information of the PDCCH, such as frequency bands occupied in the frequency domain and number of OFDM symbols occupied in the time domain.

In some embodiments, the configuration information may further carry a terminal identifier, and after receiving the configuration information, the terminal may detect whether the terminal identifier carried by the configuration information matches with its own identifier. If so, the configuration information may be determined to be configuration information for itself. Otherwise, the configuration information may be discarded.

Wherein, the configuration information can be obtained by pre-configuration; alternatively, the configuration information may be obtained by semi-statically configuring the network device, such as configuring according to a preset time interval, determining a configuration frequency according to the amount of data to be transmitted or the data amount, and the like. The configuration mode of the configuration information is not limited in the present application.

It is to be understood that the frequency domain location information, the time domain location information, the BWP configuration information, the search space configuration information, the CORESET location information, and the like may be carried in one configuration information, or may be carried in multiple pieces of configuration information, for example, the frequency domain location information and/or the time domain location information is carried in one configuration information, the BWP configuration information, the search space configuration information, and the CORESET location information is carried in another configuration information, and the like, and the application is not limited thereto.

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

Alternatively, in some embodiments, the terminal may be configured with DRX parameters, which may include information of the second timer. If the terminal does not blindly detect the PDCCH within the time length 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, and the like, such as any one or more of the following: a DRX duration timer such as DRX-onDurationTimer, a DRX inactivity timer such as DRX-inactivity timer, a DRX downlink retransmission timer such as DRX-retransmission timer dl, a DRX uplink retransmission timer such as DRX-retransmission timer ul, and a contention resolution timer such as ra-ContentionResolutionTimer, if the PDCCH is not detected when the first timer expires, the terminal may blindly detect the PDCCH based on information of the second timer, i.e., the one or more timers, and in the second power mode.

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

In this embodiment, the terminal can monitor the indication information from the network device through the low power mode, and start the timer when monitoring the indication information, and further perform the PDCCH blind detection through the normal power mode during the operation of the timer, so that the terminal can perform the PDCCH blind detection according to the indication of the network device, which reduces the power consumption of the terminal, and is helpful for increasing the chance of the network side to seize signals, thereby improving the efficiency of data transmission, and the PDCCH detection can be realized through the switching of the power mode, which further reduces the power consumption of the terminal.

Referring to fig. 3, fig. 3 is a flowchart illustrating another method for blind PDCCH detection according to an embodiment of the present disclosure. The method of this embodiment may be specifically applied to the network device as described above at the sending end, and as shown in fig. 3, the method includes:

301. and if the network equipment occupies the channel, the network equipment generates indication information, and the indication information is used for indicating the terminal to start blind detection of the PDCCH.

In some embodiments, the network device may further send configuration information to the terminal device, where the configuration information may include frequency domain location information of the indication information, and the frequency domain location information may be used to indicate a frequency domain location where the indication information is received. The network device may send the indication information to the terminal at the frequency domain location. Optionally, the configuration information may further include time domain position information of the indication information, where the time domain position information may be used to indicate a time domain position at which the indication information is received, for example, the time domain position information may include a time period, and the like. The network device may 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 position and/or the time domain position information, monitoring overhead is reduced, and monitoring efficiency is improved.

In some embodiments, the configuration information may also include any one or more of: BWP configuration information, search space configuration information, and CORESET location information, among others. Wherein, the BWP configuration information may include control channel parameters, data channel parameters, and the like; the search space configuration information may be used to indicate a location of a search space, and may include information such as a starting OFDM symbol number of a PDCCH; the CORESET may include frequency domain position information and time domain position information of the PDCCH, such as frequency bands occupied in the frequency domain and the number of OFDM symbols occupied in the time domain.

Wherein, the configuration information can be obtained by pre-configuration; alternatively, the configuration information may be configured semi-statically by the network device and sent to the terminal, for example, sent to the terminal according to a preset time interval, or determine a configuration frequency according to the amount of data to be transmitted or the data amount, and the like. The configuration and transmission method of the configuration information is not limited in the present application. Optionally, the configuration information may further carry a terminal identifier, so that after receiving the configuration information, the terminal can determine whether the configuration information is configuration information for itself by detecting whether the terminal identifier carried by the configuration information matches with the identifier of the terminal.

302. The network equipment sends the indication information to the terminal.

In some embodiments, the indication information may include a terminal identifier, so that the terminal determines whether to perform PDCCH blind detection according to the terminal identifier. Optionally, the indication information may be PDCCH information or a sequence signal such as DMRS, etc.

In some embodiments, the duration of the first timer may also be included in the indication information. Or, the network device may also semi-statically configure information of the first timer, such as a duration of the first timer, and the like; alternatively, the network device may also obtain the information of the first timer through other configurations, which is not limited in this application.

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 further include time information of the network device occupying the channel, such as an occupation duration of the network device preempting the channel, a start time location of the preempting channel, and/or an end time location of the preempting channel, etc., to indicate that the terminal blindly detects the PDCCH.

In some embodiments, the indication information may further include start control information, which may be used to instruct the terminal to start the first timer; alternatively, the start control information may be used to indicate whether the terminal starts the first timer.

It is to be understood that, in an alternative embodiment, the indication information may also be configured in advance, so that the network device may directly send the indication information to the terminal without generating and then sending the indication information after preempting the channel or when determining that the PDCCH is blindly detected by the indication terminal.

In the embodiment of the application, the network device may send the indication information for indicating the PDCCH blind detection to the terminal after preempting the channel, so that the terminal can monitor the indication information, so as to perform the PDCCH detection when monitoring the indication information, and the network side does not need to preempt the channel only in the periodic wake-up time period of the terminal, which is beneficial to increasing the chance of preempting the channel by the network side, thereby improving the efficiency of data transmission and reducing the power consumption of the terminal.

Referring to fig. 4, fig. 4 is an interaction diagram of a method for blind detection of a PDCCH according to an embodiment of the present disclosure. In this embodiment, the terminal is configured with a first receiver and a second receiver, where 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, 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 may be a low power or zero power receiver, and may be configured to listen for the indication information; the second receiver may be a normal power receiver, and may be used for blind detection of the PDCCH or receiving user data, etc. As shown in fig. 4, the method includes:

401. and the network equipment sends configuration information to the terminal, wherein the configuration information comprises frequency domain position 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 may be carried in the same configuration information and sent to the terminal, or may 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 location information indicating information, which may be used to indicate a frequency domain location where the indication information is received. Optionally, the first receiver configuration information may further include time domain position information of the indication information, where the time domain position information may be used to indicate a time domain position for receiving the indication information, for example, the time domain position information may include a time period, and the like. The configuration information of the second receiver may include BWP configuration information, searchspace configuration information, CORESET location information, etc., which are not described herein in detail.

The terminal may receive configuration information from the network device, including the first configuration information and the second configuration information, and may determine a location to receive the indication information according to the configuration information, such as the first configuration information, for example, determine a frequency domain location of the indication information according to the frequency domain location information, determine a time domain location to receive the indication information according to the time domain location information, and the like. Optionally, the terminal may further determine the location of the PDCCH according to the configuration information, for example, according to the BWP configuration information, searchspace configuration information, and CORESET location information.

402. And the network equipment sends indication information to the terminal at the frequency domain position, wherein the indication information is used for indicating the terminal to start blind detection of the PDCCH.

In some embodiments, the network device may send indication information to the terminal on the frequency domain position indicated by the frequency domain position information to indicate the terminal to perform PDCCH blind detection. For example, after the network device seizes the channel based on the LBT mechanism, the indication information may be sent to the terminal at the frequency domain position. Optionally, the network device may further send, in combination with the time domain location information, indication information to the terminal at the time domain location and the frequency domain location indicated by the time domain location information.

403. And the terminal monitors the indication information from the network equipment in a 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, and therefore power consumption of the terminal is saved. The terminal may specifically listen for the indication information based on the configuration information, such as the first configuration information, for example to listen for the indication information at the frequency domain location. If the first configuration information includes time domain position information, the terminal can also monitor indication information at the time domain position indicated by the time domain position information by combining the time domain position 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 to listen to the indication information all the time, the terminal may listen to the indication information all the time at the frequency domain location.

In this embodiment, the first receiver may be always in an on state to keep listening for the indication information. Because the terminal monitors the indication information all the time, the network can monitor the channel at any time according to whether data is transmitted to the terminal, and if the network side monitors and acquires the channel, the network side can send the indication information to the terminal, so that the opportunity of the network side to seize the channel is not limited, and the improvement of the data transmission efficiency is facilitated.

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

Optionally, after monitoring the indication information, the terminal may determine a blind detection PDCCH; or, the terminal may further determine whether to blind-check the PDCCH based on the monitored indication information, for example, the terminal may determine to blind-check the PDCCH by detecting whether a terminal identifier carried by the indication information matches with its own identifier, and determining that the indication information is indication information for itself when matching. After determining the PDCCH for blind detection, the terminal may start a first timer, so as to perform PDCCH blind detection based on the first timer.

405. And the terminal blindly detects the PDCCH in a second power mode through a second receiver within the time length corresponding to the first timer.

And when the terminal performs PDCCH blind detection, the second receiver can be started to realize PDCCH blind detection in a second power mode. It can be appreciated that when the network device has no data to transmit to the terminal, the terminal may turn off the normal power receiver, i.e., the second receiver, so that power consumption of the terminal may be saved. That is, the second receiver may be turned on only when it is determined that the network device wants to schedule the terminal.

Optionally, the indication information may further include a 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 further include time information of the channel occupied by the network device, so that the terminal may determine the duration of the first timer according to the time information of the channel occupied; alternatively, (the duration of) the first timer may be preconfigured, such as configured by the RRC layer; alternatively, (the duration of) the first timer may be configured semi-statically or configured in other ways, and so on, which are not described herein in detail.

If the PDCCH is detected in a blind manner within the duration of the first timer, the terminal may turn off the second receiver, or may turn off the second receiver again when the first timer is overtime, so as to save the power consumption of the terminal.

Further, if the first timer is overtime and does not detect the PDCCH yet, the terminal can stop the blind detection of the PDCCH and can close the second receiver; or, if the first timer expires and no PDCCH is detected, the terminal may further perform blind detection on the PDCCH in combination with other manners, and perform blind detection through the second receiver.

Optionally, the terminal may be configured with a DRX parameter, and the terminal may further perform PDCCH blind detection with the DRX parameter. The DRX parameter may be configured for the terminal by the network device, or configured by the RRC layer, or configured by other manners, 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, and the like, which may include a DRX duration timer, such as DRX-onduration timer, a DRX inactivity timer, such as DRX-InactivityTimer, a DRX retransmission timer, such as an uplink retransmission timer, such as DRX-retransmission timer ul, a downlink retransmission timer, such as DRX-retransmission timer dl, a contention resolution timer, such as ra-contentresourcnterresolution timer, a HARQ round trip time timer, such as an uplink HARQ round trip time timer, such as DRX-HARQ-RTT-timer ul, a downlink HARQ round trip time timer, such as DRX-HARQ-RTT-rdl, and the like. It is to be understood that the DRX parameter may also be carried in other information sent to the terminal, for example, part or all of the DRX parameter may also be carried in the indication information, such as the duration of DRX-duration timer indicated by the indication information. If the indication information indicates the DRX parameter and the DRX parameter is configured by other manners, the DRX parameter indicated by the indication information can cover the DRX parameter configured by other manners, such as an RRC layer.

And the terminal can further perform PDCCH blind detection according to the one or more timers. For example, the terminal may use the drx-ondurationTimer as a first timer to perform PDCCH blind detection based on the drx-ondurationTimer; if the PDCCH is not blind detected within the time length of the drx-onDurationTimer, that is, if the PDCCH is not blind detected within the time length of the drx-onDurationTimer, the terminal can stop blind detection of the PDCCH and turn off the second receiver, or the terminal can perform PDCCH blind detection through the second receiver according to any one or more of the drx-InactivityTimer, the drx-RecransmissionTimeUL, the drx-RecransmissionTimerDL and the ra-ContentionResolutionTimer. For another example, the first timer is a timer other than the DRX parameter, and if the terminal does not blindly detect the PDCCH within the duration of the first timer, the terminal may stop blindly detecting the PDCCH and turn off the second receiver, or the terminal may further perform PDCCH blindness detection through the second receiver according to any one or more of DRX-on duration timer, DRX-InactivityTimer, DRX-retransmission timer ul, DRX-retransmission timer rdl, and ra-ContentionResolutionTimer, so as to improve the success rate and reliability of PDCCH blindness detection.

When a PDCCH blind detection is performed based on any one or more of timers such as drx-onDurationTimer, drx-InactivityTimer, drx-retransmission timerrl, drx-retransmission timerdl, ra-contentionresolutiontintertimer, etc., the any one or more timers may be started immediately after the first timer expires (the plurality of timers may be started in a preset order); alternatively, the one or more timers may be started according to an indication of configuration information or indication information, for example, the configuration information or the indication information carries a starting time of each timer; alternatively, any one or more of the timers may also be started according to a certain rule, which is not limited in this application.

For example, if it is time to start the DRX on duration timer, the terminal may decide the time to start the DRX on duration timer 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 x 10) + subframe number ] module (DRX-ShortCycle) = (DRX-StartOffset) module (DRX-ShortCycle); or, if Long DRX Cycle is used and the current subframe satisfies [ (SFN × 10) + subframe number ] module (DRX-Long Cycle) = DRX-StartOffset; then drx-onDurationTimer is started at a time instant after drx-SlotOffset slots from the beginning of the current subframe. For another example, if the drx-inactivity timer is started, the terminal may start the drx-inactivity timer when receiving a PDCCH indicating initial downlink or uplink transmission. For another example, if the drx-retransmission TimerDL is started, the terminal may receive a PDCCH indicating downlink transmission, or receive a Media Access Control (MAC) Protocol Data Unit (PDU) message on the configured downlink grant resource, and then the terminal may start drx-HARQ-RTT-TimerDL corresponding to the HARQ process after completing transmission of Hybrid Automatic Repeat reQuest (HARQ) process feedback for the downlink transmission, and simultaneously stop drx-retransmission TimerDL corresponding to the HARQ process; if a timer drx-HARQ-RTT-TimerDL corresponding to a certain HARQ of the terminal is overtime and the downlink data transmitted by using the HARQ process is unsuccessfully decoded, the terminal may start drx-retransmission TimerDL corresponding to the HARQ process. For another example, if it is drx-retransmission timerll that is started, the terminal may receive a PDCCH indicating uplink transmission or send a MAC PDU on the configured uplink grant resource, and then the terminal may start drx-HARQ-RTT-timerll corresponding to the HARQ process after completing the uplink transmission, and stop drx-retransmission timerll corresponding to the HARQ process; if the timer drx-HARQ-RTT-TimerUL corresponding to a certain HARQ of the terminal is overtime, the terminal starts the drx-retransmission TimerUL corresponding to the HARQ process.

Optionally, if the terminal detects the PDCCH during the DRX-on duration timer or the first timer running period, the terminal may also start the relevant DRX timer according to the above starting method of other DRX timers, which is not described herein again.

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

For example, four channel access mechanisms (categories) are defined in the NR-U, namely LBT types, including Category 1-4.Category 1 is a direct transmission mechanism that a sender, such as a network device, can transmit quickly after a switching gap (switching gap), which is the transition time for receiving a transmission and typically does not exceed 16us. Category 2 is an LBT mechanism without random backoff back-off, which means that the time for sensing the channel is determined, and the time for sensing the channel is typically short, for example, 25us. Category 3 is a random back-off LBT mechanism (contention window fixed), which means that in the LBT procedure, the sending end randomly removes a random value in the contention window to determine the time for listening to the channel. Category 4 is a random back-off LBT mechanism (contention window is not fixed), which means that in the LBT procedure, the sending end randomly takes a random value in the contention window to determine the time for listening to the channel, and the contention window is variable. For category 4, the Channel Access Priority Class (Channel Access Priority Class) is shown in the following table:

wherein m is _p In relation to listening channel time for performing channel access, a network device such as a base station needs to perform channel listening for Td time first, where Td = 1694 + m _p ×9us。CW _min，p And CW _max，p Related to the random listening channel time during the channel access procedure. When the base station monitors that the Td time channel is idle, the base station needs to monitor the channel for N times, and the time duration of each time is 9us. Where N may be one from 0 to CW _p Random number in between, and CW _min，p ≤CW _p ≤CW _max，p 。T _mcot，p The maximum time for occupying the channel after the network device occupies the channel may be related to the priority of the channel adopted by the base station, for example, the priority is 1, and the maximum time for occupying the channel is 2ms after the channel sensing is successful. So that the terminal can determine the first timer according to the LBT type and/or the channel access priority. For example, the terminal may determine the duration of the first timer according to the time information of the occupied channel corresponding to the LBT type and/or the channel access priority, such as the maximum time of the occupied channel (maximum channel occupied duration), for example, the maximum time of the occupied channel is taken as the duration of the first timer; and/or, determining the starting time of the first timer according to the time information of the occupied channel, and/or determining the stopping time of the first timer according to the time information of the occupied channel, and the like.

For example, as shown in fig. 5, the network device may configure the low-power or zero-power receiver parameters for the terminal by sending configuration information to the terminal, and the terminal may detect the indication information sent by the network device according to the configuration information. As shown in the horizontal line area in fig. 5, the terminal may always detect the indication information through a low power or zero power receiver, i.e., the first receiver, and since the terminal is always listening to the indication information, the network device may perform channel sensing at any time according to whether data is to be transmitted to the terminal. If the network listens to the acquisition channel, an indication may be sent to the terminal. Further, if the terminal receives the indication information, it may determine whether to start the first timer according to the indication information, and if the first timer is started, the terminal may perform blind detection on the PDCCH through a normal power receiver, i.e., a second receiver, within a duration of the first timer, as shown by a diagonal line region in fig. 5. If the first timer is overtime, the terminal can close the normal power receiver, so that the blind detection of the PDCCH is stopped, and the power saving effect is achieved.

In this embodiment, the network device may send configuration information of the indication information to the terminal, and send, to the terminal, indication information for indicating a PDCCH blind detection after preempting the channel, so that the terminal can monitor the indication information by operating the first receiver in the first power mode based on the configuration information, and restart the corresponding timer when the indication information is monitored, and then control the second receiver to operate in the second power mode to detect the PDCCH during the operation of the timer. Therefore, the network side does not need to preempt the channel in a fixed time period, such as the periodic wake-up time period of the terminal, the opportunity of the network side to preempt the channel is not limited, the network side can preempt the channel at any time, the data transmission efficiency is improved, the terminal can realize the PDCCH blind test by controlling different receivers to work according to the indication of the network equipment, the PDCCH blind test is performed as less as possible by the terminal, and the power consumption of the terminal is reduced.

Referring to fig. 6, fig. 6 is an interaction diagram of another method for blind detection of a PDCCH according to an embodiment of the present application. In this embodiment, the terminal is configured with a receiver, and the receiver can operate in different power modes, such as a first power mode and a second power mode, where the second power mode has a higher received power than the first power mode, for example, the first power mode can be a low power or zero power mode, and the second power mode can be a normal power mode. As shown in fig. 6, the method includes:

601. and the network equipment sends configuration information to the terminal, wherein the configuration information comprises frequency domain position information of the indication information.

Wherein the frequency domain position information can be used to indicate the frequency domain position of the received indication information. Optionally, the configuration information may further include time domain position information of the indication information, and the time domain position information may be used to indicate a time domain position for receiving the indication information, for example, the time domain position information may include a time period, and the like. Further optionally, the configuration information may further include BWP configuration information, searchspace configuration information, CORESET location information, and the like, which are not described herein again.

The terminal may receive the configuration information from the network device, and may determine a location to receive the indication information according to the configuration information, such as determining a frequency domain location of the indication information according to the frequency domain location information, determining a time domain location to receive the indication information according to the time domain location information, and so on. Optionally, the terminal may further determine the location of the PDCCH according to the configuration information, for example, determine the location of the PDCCH according to the BWP configuration information, searchspace configuration information, and CORESET location information.

602. And the network equipment sends indication information to the terminal at the frequency domain position, wherein the indication information is used for indicating the terminal to start blind detection of the PDCCH.

In some embodiments, the network device may send indication information to the terminal on the frequency domain position indicated by the frequency domain position information to indicate the terminal to perform PDCCH blind detection. For example, after the network device seizes the channel based on the LBT mechanism, the indication information may be sent to the terminal at the frequency domain location. Optionally, the network device may further send, in combination with the time domain location information, indication information to the terminal at the time domain location and the frequency domain location indicated by the time domain location information.

603. And the terminal monitors the indication information from the network equipment in a first power mode at the frequency domain position indicated by the frequency domain position information.

The terminal may control the receiver to operate in the first power mode and monitor the indication information based on the configuration information, such as monitoring the indication information in the first power mode and at the frequency domain location, to save power consumption of the terminal. If the configuration information comprises time domain position information, the terminal can monitor indication information in the time domain position indicated by the time domain position information by combining the time domain position 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 to monitor the indication information all the time, the terminal may monitor the indication information all the time at the frequency domain location.

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

In some embodiments, after monitoring the indication information, the terminal may determine a blind detection PDCCH; or, the terminal may further determine whether to blind-detect the PDCCH based on the monitored indication information, for example, the terminal may determine to blind-detect the PDCCH by detecting whether a terminal identifier carried by the indication information matches with its own identifier, and determining that the indication information is indication information for itself when matching. After determining the PDCCH for blind detection, the terminal may start a first timer, so as to perform PDCCH blind detection based on the first timer.

605. And the terminal blindly detects the PDCCH in a second power mode within the time length corresponding to the first timer.

When the terminal performs the PDCCH blind detection, the receiver can be controlled to switch from the first power mode to the second power mode, namely, the first power mode is closed, the second power mode is opened, and the PDCCH blind detection is performed through the second power mode.

If the PDCCH is detected in a blind manner within the duration of the first timer, the terminal may close the second power mode, or may close the second power mode after the first timer is overtime, so as to save the power consumption of the terminal. After the second power mode is turned off, the terminal may turn on the first power mode, i.e., control the receiver to operate in the first power mode, so as to continue to listen for the indication information.

If the first timer is overtime and does not detect the PDCCH, the terminal can stop the blind detection of the PDCCH, can close the second power mode and start the first power mode; or, if the PDCCH is not detected after the first timer expires, the terminal may further perform blind detection on the PDCCH in combination with other manners, and perform blind detection in the second power mode.

Optionally, if the terminal is configured with the DRX parameter, the terminal may further perform PDCCH blind detection with reference to the DRX parameter. The DRX parameter may be configured for the terminal by the network device, or configured by the RRC layer, or configured by another method, which is not limited in this application.

For example, in 5G NR, the network device may configure DRX parameters for the terminal, such as the DRX parameters may include: drx-onDurationTimer, drx-InactivityTimer, drx-RecransmissionTimerUL, drx-RecransmissionTimerDL, ra-ContentionResolutionTimer, drx-HARQ-RTT-TimerUL, drx-HARQ-RTT-TimerDL, and the like. The terminal may use the drx-onDurationTimer as a first timer to perform PDCCH blind detection based on the drx-onDurationTimer; optionally, if the PDCCH is not blind-detected within the time length of the drx-onDurationTimer, that is, the PDCCH is not blind-detected when the drx-onDurationTimer times out, the terminal may stop blind-detecting the PDCCH and close the second power mode; alternatively, the terminal may further perform PDCCH blind detection in the second power mode according to any one or more of drx-inactivytimeter, drx-retransmission timerrl, drx-retransmission timerdl, and ra-ContentionResolutionTimer. Or, the first timer may be other timers except the DRX parameter, and if the terminal does not blindly detect the PDCCH within the duration of the first timer, the terminal may stop blindly detecting the PDCCH and turn off the second power mode, or if the terminal does not blindly detect the PDCCH within the duration of the first timer, the terminal may further perform PDCCH blinddetection in the second power mode according to any one or more of DRX-on duration timer, DRX-inactivytimeter, DRX-retransmission timer ul, DRX-retransmission timer dl, and ra-contentionresolution timer, so as to improve the success rate and reliability of PDCCH blindness detection. When a PDCCH blind test is performed based on any one or more of drx-onDurationTimer, drx-InactivetyTimer, drx-RecransmissionTimeUL, drx-RecransmissionTimerDL, ra-ContentionResolutionTimer, the any one or more timers may be started immediately after the first timer expires; alternatively, the one or more timers may be started according to an indication of configuration information or indication information, for example, the configuration information or the indication information carries a starting time of each timer; alternatively, the one or more timers may also be started according to a certain rule, which specifically refers to the related description of the embodiment shown in fig. 4, and is not described herein again. Further optionally, the terminal may control the receiver to operate in the first power mode at times other than when the one or more timers are started.

Optionally, if the terminal detects the PDCCH during the DRX-on duration timer or the first timer running period, the terminal may also start the relevant DRX timer according to the above starting method of other DRX timers, which is not described herein.

Optionally, the indication information may further include a type of LBT mechanism adopted by the network device, that is, an LBT type. Optionally, the indication information may further include a priority of channel access. So that the terminal determines the first timer according to the LBT type and/or the channel access priority, which is not described herein again.

In this embodiment, the network device may send configuration information of the indication information to the terminal, and send, to the terminal, indication information for indicating a PDCCH blind test after preempting the channel, so that the terminal can monitor the indication information by controlling the receiver to operate in the first power mode based on the configuration information, and start a corresponding timer when the indication information is monitored, and further control the receiver to operate in the second power mode during operation of the timer to perform detection of the PDCCH, so that the network side does not need to preempt the channel in a fixed time period, such as a time period of terminal periodic wake-up, thereby not limiting an opportunity of the network side to preempt the channel, and the terminal can implement the PDCCH blind test by controlling the receiver to operate in different power modes according to an indication of the network device, thereby reducing power consumption of the terminal, improving efficiency of data transmission, and contributing to reducing cost of the terminal.

It can be understood that the foregoing method embodiments are all illustrations of methods for blind detection of a PDCCH in the present application, and descriptions of various embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

Please refer to fig. 7, which is a schematic structural diagram of a terminal according to 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, wherein the one or more programs 721 are stored in the memory 720 and configured to be executed by the processor 710, the programs comprising instructions for:

monitoring indication information from network equipment in a first power mode, wherein the indication information is used for indicating a terminal to start blind detection of a PDCCH;

if the indication information is monitored, starting a first timer;

and in the time length corresponding to the first timer, the PDCCH is detected in a blind mode in a second power mode, and the receiving power corresponding to the second power mode is higher than that corresponding to the first power mode.

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

when monitoring indication information from a network device in a first power mode, the instructions in the program are specifically configured to:

listening, by the first receiver, for indication information from a network device in a first power mode;

when the PDCCH is blind detected in the second power mode, the instructions in the program are specifically configured to perform the following operations:

blind detecting, by the second receiver, the PDCCH in a second power mode.

Optionally, the instructions in the program are further configured to perform the following operations:

receiving configuration information from the network device, wherein the configuration information comprises frequency domain position information for receiving the indication information; when listening in the first power mode for indication information from the network device, the instructions in the program are specifically configured to:

and monitoring indication information from the network equipment in a first power mode 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: and receiving time domain position information, BWP configuration information, search space configuration information and control resource set CORESET position information of the indication information.

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

Optionally, the instructions in the program are further configured to perform the following operations: determining the starting time of the first timer according to the time information of the channel occupied by the network equipment; and/or the presence of a gas in the atmosphere,

and determining the duration of the first timer according to the time information of the channel occupied by the network equipment.

Optionally, the indication information includes start control information, where the start 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 configured to perform the following operations:

and if the starting control message indicates that the terminal starts the first timer, starting the first timer.

Optionally, the indication information includes a duration of the first timer, or the duration of the first timer is obtained by pre-configuration.

Optionally, the terminal is configured with a discontinuous reception DRX parameter, where the DRX parameter includes information of the first timer.

Optionally, the terminal is configured with a discontinuous reception DRX parameter, where the DRX parameter includes information of a second timer; after the PDCCH is blindly detected in the second power mode within the time duration corresponding to the first timer, the instructions in the program are further configured to perform the following operations:

and if the PDCCH is not detected in a blind way within the time length corresponding to the first timer, the PDCCH is detected in a blind way according to the information of the second timer.

Optionally, before starting the preset first timer, the instructions in the program are further configured to:

determining whether to start a first timer according to the indication information;

the indication information comprises a terminal identification; when the preset first timer is started, the instructions in the program are specifically configured to perform the following operations:

and if the identification of the terminal is matched with the terminal identification included in the indication information, starting the first timer.

Optionally, after the PDCCH is blind-detected in the second power mode within the time duration corresponding to the first timer, the instruction in the program is further configured to perform the following operations:

and if the first timer is overtime or the PDCCH is detected in a blind way within the duration of the first timer, closing the second power mode.

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

Please refer to fig. 8, which is a schematic structural diagram of a network device according to 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, wherein the one or more programs 821 are stored in the memory 820 and configured to be executed by the processor 810, the programs comprising instructions for performing the following steps;

if the channel is preempted, generating indication information, wherein the indication information is used for indicating a terminal to start blind detection of the PDCCH;

and sending the indication information to the terminal.

sending configuration information to the terminal, wherein the configuration information comprises frequency domain position information for receiving the indication information;

when the indication information is sent to the terminal, the instruction in the program is specifically configured to perform the following operations:

and 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: and receiving time domain position information, BWP configuration information, search space configuration information and CORESET position information of the indication information.

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

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

The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that the terminal and the network device include hardware structures and/or software modules for performing the respective functions in order to realize the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal and the network device may be divided into the functional units according to the method example, 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 integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Referring to fig. 9, fig. 9 shows another possible structure diagram of the terminal according to the above embodiment. Referring to fig. 9, the terminal 900 may include: a processing unit 901 and a communication unit 902. Wherein the units may perform the respective functions of the terminal in the above method example. Processing unit 901 is configured to control and manage actions of the terminal, e.g., processing unit 901 is configured to enable the terminal to perform steps 201 to 203 in fig. 2, 403 to 405 in fig. 4, 603 to 605 in fig. 6, and/or other processes for the techniques described herein. The communication unit 902 may be used to support communication between the terminal and other devices, for example, with network devices. The terminal may also include a storage unit 903 for storing program codes and data for the network devices.

The Processing Unit 901 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. 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, through the communication unit 902, indication information from a network device in a first power mode, where the indication information is used to indicate a terminal to start blind detection of a PDCCH; the processing unit 901 is further configured to start a first timer when the indication information is monitored; the processing unit 901 is further configured to blindly detect, through the communication unit 902, the PDCCH in a second power mode within a duration corresponding to the first timer, where a received power corresponding to the second power mode is higher than a received power corresponding to the first power mode.

the communication unit 902 may be specifically configured to listen, by the first receiver, for indication information from a network device in a first power mode;

the communication unit 902 may be specifically configured to blind detect the PDCCH by the second receiver in the second power mode.

Optionally, the communication unit 902 may be further 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 indication information from a network device in a first power mode at a frequency domain location indicated by the frequency domain location information.

Optionally, the processing unit 901 may be further configured to determine a starting time of the first timer according to the time information that the network device occupies the channel; and/or determining the duration of the first timer according to the time information of the channel occupied by the network equipment.

Optionally, the indication information includes start control information, where the start 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 indicates that the terminal starts the first timer.

Optionally, the terminal is configured with a discontinuous reception DRX parameter, where the DRX parameter includes information of a second timer;

the processing unit 901 may be further 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 duration corresponding to the first timer.

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

Optionally, the indication information includes a terminal identifier;

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

Optionally, the processing unit 901 may be further configured to, when the first timer expires or a PDCCH is detected in a blind manner within a duration of the first timer, close the second power mode.

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

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 according to the embodiment of the present application may be the terminal shown in fig. 7.

Optionally, the terminal may implement, through the above-mentioned units, part or all of the steps performed by the terminal in the method in the embodiment shown in fig. 2 to 6. It should be understood that the embodiments of the present application are device embodiments corresponding to the method embodiments, and descriptions of the method embodiments are also applicable to the embodiments of the present application, and are not repeated herein.

Referring to fig. 10, fig. 10 is a schematic diagram illustrating another possible structure of the network device according to the above embodiment. Referring to fig. 10, the network device 100 may include: a processing unit 1001 and a communication unit 1002. Wherein these units may perform the respective functions of the network device in the above-described method example. Processing unit 1001 is configured to control and manage actions of the network device, for example, processing unit 1001 is configured to support the network device to perform steps 301 to 302 in fig. 3, 401 to 402 in fig. 4, 601 to 602 in fig. 6, and/or other processes for the techniques described herein. The communication unit 1002 may be used to support communication between the network device and other devices, such as a terminal. The network device may further comprise 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, or the like, and the storage unit 1003 may be a memory.

For example, the processing unit 1001 is configured to generate indication information when a channel is preempted, where the indication information is used to indicate that a terminal starts to perform blind detection on a PDCCH;

a communication unit 1002, configured to send the indication information to a 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 of 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.

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

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 according to the embodiment of the present application may be a network device shown in fig. 8.

Optionally, the network device may implement, by the above-mentioned unit, part or all of the steps performed by the network device in the method in the embodiments shown in fig. 2 to fig. 6. It should be understood that the embodiments of the present application are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present application, which is not repeated herein.

It is understood that the division of the units in the embodiments of the present application is illustrative, and is only one logical function division, and there may be another division manner in actual implementation. Each functional unit 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 are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The application also provides a communication system, which comprises the terminal and/or the network equipment. Optionally, the system may further include other devices interacting with the network element in the solution provided in this embodiment. The network device and/or the terminal may perform part or all of the steps in the methods in the embodiments shown in fig. 2 to fig. 6, which may specifically refer to the related descriptions of the embodiments, and are not described herein again.

The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the terminal in the above method embodiment.

The present application also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the network device in the above method embodiments.

Embodiments of the present application also provide a computer program product, where 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 perform some or all of the steps described in the terminal in the above method embodiments. The computer program product may be a software installation package.

Embodiments of the present application further provide a computer program product, where 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 perform some or all of the steps described in the network device in the method. The computer program product may be a software installation package.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, read Only Memory (ROM), erasable Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may be located in a communication device such as a terminal, a network device. Of course, the processor and the storage medium may reside as discrete components in a communication apparatus.

It is to be understood that the reference herein to first, second, third and various numerical designations is merely a convenient division to describe and is not intended to limit the scope of the embodiments of the present application.

It is to be understood that the term "and/or" herein is merely one type of association relationship describing an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It will be appreciated by those of skill in the art that in one or more of the examples described above, the functionality described in the embodiments of the application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions can 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 can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., digital Video Disk (DVD)), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.

Claims

1. A method for blind detection of a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:

the method comprises the steps that a terminal monitors indication information from network equipment in a first power mode, wherein the indication information is used for indicating the terminal to start blind detection of a PDCCH, the indication information comprises a sequence, a type of LBT (local binary transmission) adopted by the network equipment and priority of channel access, and the terminal is configured on a narrow-band frequency domain resource in advance and is configured with the sequence;

if the terminal monitors the indication information and the sequence included in the indication information is orthogonal to the sequence configured for the terminal, the terminal starts a first timer, and the first timer is determined according to the LBT type and/or the priority of channel access;

2. The method of claim 1, wherein the terminal is configured with a first receiver and a second receiver, wherein a received power of the first receiver is the same as a received power corresponding to the first power mode, and wherein a received power of the second receiver is the same as a received power corresponding to the second power mode;

the terminal monitors indication information from network equipment in a first power mode, and the method comprises the following steps:

the terminal monitors indication information from network equipment in a first power mode through the first receiver;

the terminal blindly detects the PDCCH in a second power mode, and the method comprises the following steps:

and the terminal blindly detects the PDCCH through a second receiver in a second power mode.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

the terminal receives configuration information from the network equipment, wherein the configuration information comprises frequency domain position information for receiving the indication information; the terminal monitors indication information from network equipment in a first power mode, and the method comprises the following steps:

and the terminal monitors indication information from the network equipment in a first power mode at the frequency domain position indicated by the frequency domain position information.

4. The method of claim 3, wherein the configuration information further comprises any one or more of: and receiving time domain position information, bandwidth part BWP configuration information, search space configuration information and control resource set CORESET position information of the indication information.

5. The method according to claim 1 or 2, wherein the indication information comprises start control information, and the start control information is used for indicating whether the terminal starts the first timer; the terminal starts a first timer, comprising:

and if the starting control information indicates that the terminal starts the first timer, the terminal starts the first timer.

6. The method according to claim 1 or 2, wherein the terminal is configured with discontinuous reception, DRX, parameters comprising information of a second timer; after the terminal blindly detects the PDCCH in a second power mode within a time duration corresponding to the first timer, the method further includes:

and if the terminal does not blindly detect the PDCCH within the time length corresponding to the first timer, the terminal blindly detects the PDCCH according to the information of the second timer.

7. The method according to claim 1 or 2, wherein before the terminal starts the preset first timer, the method further comprises:

and the terminal determines whether to start a first timer according to the indication information.

8. The method according to claim 1 or 2, wherein after the terminal blindly detects the PDCCH in the second power mode within the time duration corresponding to the first timer, the method further comprises:

and if the first timer is overtime or the PDCCH is detected in a blind way within the duration of the first timer, the terminal closes the second power mode.

9. The method according to claim 1 or 2, wherein the indication information is PDCCH information or a sequence signal.

10. A method for blind detection of a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:

if the network equipment occupies the channel, the network equipment generates indication information, the indication information is used for indicating a terminal to start blind detection of a PDCCH, the indication information comprises a sequence, a type of LBT (local binary transmission) adopted by the network equipment and transmitted after interception and a priority of channel access, and the terminal is configured on a narrow-band frequency domain resource in advance and is configured with the sequence;

the network equipment sends the indication information to a terminal, so that the terminal starts a first timer under the condition that the indication information is monitored and the sequence included by the indication information is orthogonal to the sequence configured for the terminal, a PDCCH is detected in a blind mode in a second power mode within a time length corresponding to the first timer, and the first timer is determined according to the LBT type and/or the priority of channel access; and the terminal monitors the indication information in a first power mode, and the receiving power corresponding to the second power mode is higher than that corresponding to the first power mode.

11. The method of claim 10, further comprising:

the network equipment sends configuration information to the terminal, wherein the configuration information comprises frequency domain position information for receiving the indication information;

the network device sends the indication information to a terminal, and the indication information comprises:

and the network equipment sends the indication information to the terminal at the frequency domain position indicated by the frequency domain position information.

12. The method of claim 11, wherein the configuration information further comprises any one or more of: and receiving time domain position information, bandwidth part BWP configuration information, search space configuration information and control resource set CORESET position information of the indication information.

13. The method according to any of claims 10-12, wherein the indication information is PDCCH information or a sequence signal.

14. A terminal comprising a processing unit and a communication unit;

the processing unit is configured to monitor, by the communication unit, indication information from a network device in a first power mode, where the indication information is used to indicate a terminal to start a blind detection PDCCH, the indication information includes a sequence, a listen-before-transmit LBT type used by the network device, and a priority of channel access, and the terminal is pre-configured on a narrowband frequency domain resource and is configured with the sequence;

the processing unit is further configured to start a first timer when the indication information is monitored and a sequence included in the indication information is orthogonal to a sequence configured for the terminal, where the first timer is determined according to the LBT type and/or the priority of channel access;

the processing unit is further configured to perform blind detection on the PDCCH in a second power mode through the communication unit within a duration corresponding to the first timer, where a received power corresponding to the second power mode is higher than a received power corresponding to the first power mode.

15. A network device comprising a processing unit and a communication unit;

the processing unit is configured to generate indication information when a channel is preempted, where the indication information is used to indicate a terminal to start blind detection of a PDCCH, and the indication information includes a sequence, a listen-before-transmit LBT type adopted by the network device, and a priority of channel access, and the terminal is pre-configured on a narrowband frequency domain resource and is configured with the sequence;

the communication unit is configured to send the indication information to a terminal, so that the terminal starts a first timer when the indication information is monitored and a sequence included in the indication information is orthogonal to a sequence configured for the terminal, and blindly detects a PDCCH in a second power mode within a time duration corresponding to the first timer, where the first timer is determined according to the LBT type and/or the priority of channel access; and the terminal monitors the indication information in a first power mode, and the receiving power corresponding to the second power mode is higher than that corresponding to the first power mode.

16. A terminal comprising a processor, memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-9.

17. A network device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps in the method of any of claims 10-13.

18. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, the computer program causing a computer to perform the method according to any one of claims 1-9.

19. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, the computer program causing a computer to perform the method according to any one of claims 10-13.