CN110011766B

CN110011766B - Beam failure detection method, terminal and network equipment

Info

Publication number: CN110011766B
Application number: CN201810012612.0A
Authority: CN
Inventors: 杨宇
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-01-05
Filing date: 2018-01-05
Publication date: 2021-07-13
Anticipated expiration: 2038-01-05
Also published as: CN110011766A

Abstract

The embodiment of the invention provides a beam failure detection method, a terminal and network equipment, relates to the technical field of communication, and aims to solve the problem that beam failure detection cannot be carried out due to the fact that the horizontal PDCCH BLER cannot be accurately calculated in the prior art. The method comprises the following steps: the terminal receives a synchronous signal block SSB; wherein, the SSB is used for the beam failure detection of the downlink beam; acquiring the power of the SSB; determining the block error rate of the hypothetic PDCCH of the downlink beam according to the power of the SSB; and judging whether the downlink wave beam fails or not according to the block error rate of the horizontal PDCCH of the downlink wave beam. Therefore, the beam failure detection is performed on the downlink beam by using the SSB issued by the network equipment, and the power of the high-reliability PDCCH is obtained by the power of the SSB, so that the beam failure detection is accurately performed on the downlink beam.

Description

Beam failure detection method, terminal and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a beam failure detection method, a terminal, and a network device.

Background

In a high-band communication system, since a radio signal has a short wavelength, communication is easily interrupted due to signal blocking, User Equipment (UE) movement, and the like. In a high-band communication system, when communication interruption occurs, beam failure detection (beam failure detection) is first required to resume communication.

In general, the general procedure for beam failure detection is: the UE acquires a block error rate (BLER) of a Physical Downlink Control Channel (PDCCH) assumed (horizontal) by monitoring a beam failure detection reference signal (beam failure detection reference signal) on a Downlink beam in a Physical layer, and determines that the Downlink beam fails if the acquired BLER of the Physical PDCCH exceeds a preset threshold. Specifically, the aforementioned horizontal PDCCH BLER is obtained according to a Signal-to-Interference plus Noise Ratio (SINR) of the horizontal PDCCH, where the SINR of the horizontal PDCCH is obtained based on the power of the horizontal PDCCH and the Interference plus Noise power, and the power of the horizontal PDCCH is indirectly obtained by measuring the beam failure detection reference Signal. In the above beam failure detection process, a Channel State Information Reference Signal (CSI-RS) or a Synchronization Signal Block (SSB) is mainly used as a beam failure detection Reference Signal, and the CSI-RS or the SSB is usually spatially Quasi-Co-located (QCL) with a Demodulation Reference Signal (DMRS) on a underlying PDCCH.

However, when the network device configures the SSB for the UE as the beam failure detection reference signal, there is no effective beam failure detection scheme currently.

Disclosure of Invention

The embodiment of the invention provides a beam failure detection method, a terminal and network equipment, which aim to solve the problem that beam failure detection cannot be carried out due to the fact that the horizontal PDCCH BLER cannot be accurately calculated in the prior art.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a method for detecting a beam failure, which is applied to a terminal, and the method includes:

receiving a synchronization signal block SSB; wherein, the SSB is used for beam failure detection of a downlink beam;

acquiring the power of the SSB;

determining the block error rate of the PDCCH of the downlink wave beam according to the power of the SSB;

and judging whether the downlink wave beam fails or not according to the block error rate of the assumed PDCCH of the downlink wave beam.

In a second aspect, an embodiment of the present invention provides a beam failure detection method, which is applied to a network device, and the method includes:

sending a synchronization signal block SSB; wherein, the SSB is used for beam failure detection of a downlink beam; the SSB is used for indicating a terminal to obtain the power of the SSB, determining the block error rate of the PDCCH of the downlink beam according to the power of the SSB, and judging whether the downlink beam fails according to the block error rate of the PDCCH of the downlink beam.

In a third aspect, an embodiment of the present invention provides a terminal, including:

a receiving module, configured to receive a synchronization signal block SSB; wherein, the SSB is used for beam failure detection of a downlink beam;

an obtaining module, configured to obtain power of an SSB received by the receiving module;

a determining module, configured to determine, according to the power of the SSB acquired by the acquiring module, a block error rate of a PDCCH, which is an assumed physical downlink control channel of the downlink beam;

and the judging module is used for judging whether the downlink wave beam fails or not according to the block error rate of the assumed PDCCH of the downlink wave beam determined by the determining module.

In a fourth aspect, an embodiment of the present invention provides a network device, including:

a sending module, configured to send a synchronization signal block SSB; wherein, the SSB is used for beam failure detection of a downlink beam; the SSB is used for indicating a terminal to obtain the power of the SSB, determining the block error rate of the PDCCH of the downlink beam according to the power of the SSB, and judging whether the downlink beam fails according to the block error rate of the PDCCH of the downlink beam.

In a fifth aspect, an embodiment of the present invention provides a terminal, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the beam failure detection method according to the first aspect.

In a sixth aspect, an embodiment of the present invention provides a network device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the beam failure detection method according to the second aspect.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the beam failure detection method described above.

In the embodiment of the present invention, after receiving an SSB issued by a network device, a terminal obtains the power of the SSB, then determines the block error rate of the assumed PDCCH of the downlink beam according to the power of the SSB, and finally determines whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam. The terminal of the embodiment of the invention performs beam failure detection on the downlink beam by using the SSB issued by the network equipment, and obtains the power of the lower-level PDCCH by using the power of the SSB, thereby accurately performing beam failure detection on the downlink beam.

Drawings

Fig. 1 is a schematic diagram of a possible structure of a communication system according to an embodiment of the present invention;

fig. 2 is a first flowchart illustrating a beam failure detection method according to an embodiment of the present invention;

fig. 3 is a second flowchart illustrating a beam failure detection method according to an embodiment of the present invention;

fig. 4 is a third schematic flowchart of a beam failure detection method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a hardware structure of a network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The term "and/or" herein is merely an association describing an associated object, meaning that three 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 related objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division". The term "plurality" herein means two or more, unless otherwise specified.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used to distinguish the same items or similar items with basically the same functions or actions, and those skilled in the art can understand that the words "first", "second", and the like do not limit the quantity and execution order.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion. In the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified.

The beam failure detection method provided by the embodiment of the invention can be applied to a beam failure recovery mechanism and can also be applied to other processes needing beam failure detection, and the invention does not limit the specific application scene.

Illustratively, in a high-frequency band communication system, when communication interruption occurs, a traditional wireless link reestablishment mode is adopted to recover communication, and the time consumption is long, so the prior art introduces a beam failure recovery mechanism. The beam failure recovery mechanism generally includes: the method comprises four items of beam failure detection, candidate beam identification, a request for recovering from the failure of the transmission beam and a response for recovering from the receiving beam. The beam failure detection process in the beam failure recovery mechanism process specifically includes: the UE detects PDCCHs (or called serving PDCCHs) on all serving beams (serving beams), and if the UE detects that all the beams fail, determines that a beam failure event (beam failure event) has occurred.

In the conventional beam failure detection process, a CSI-RS or a Synchronization Signal Block (SSB) (SSB may also be referred to as SS block) may be used as a beam failure detection reference signal.

Specifically, when performing beam failure detection by using the CSI-RS as a beam failure detection reference signal, the process of calculating the assumed PDCCH block error rate (hypothetical PDCCH BLER) based on the CSI-RS specifically includes the following processes:

1) and the UE carries out interference measurement to obtain interference power.

2) And the UE measures the CSI-RS to obtain the power of the hypothetical PDCCH.

Specifically, the UE acquires a Pc _ PDCCH parameter of the CSI-RS as a beam failure detection reference signal, and then indirectly calculates the power of the assumed PDCCH according to the Pc _ PDCCH parameter. Wherein, the CSI-RS and the DMRS on the assumed PDCCH have a QCL in space. The Pc _ PDCCH parameters are: a ratio of an Energy Per Resource Element (EPRE) of PDCCH to an EPRE of non-zero power NZP (non-zero power) CSI-RS. The Pc _ PDCCH parameter is configured to the UE by the network equipment through a high-level signaling, and the value of the Pc _ PDCCH parameter is 0 dB.

The Pc _ PDCCH parameter is a power offset (power offset) between the PDCCH and the CSI-RS.

Because the power of the existing SSB is provided by the SS-PBCH-BlockPower parameter, the UE can acquire the power of the SSB according to the SS-PBCH-BlockPower parameter, and then determine the power of the CSI-RS according to the acquired power of the SSB and the Pc _ SS parameter, wherein the Pc _ SS parameter is the ratio of the SSB EPRE to the NZP CSI-RS EPRE, the Pc _ SS parameter is the power offset between the SSB and the CSI-RS, the numeric range of the power offset is [ -8,15] db, and the step size is 1 db. And then, obtaining the equivalent PDCCH power according to the CSI-RS power and the Pc _ PDCCH parameter. The SS-PBCH-BlockPower parameter is configured to the UE by the network equipment through high-layer signaling.

3) And the UE calculates the SINR of the assumed PDCCH according to the interference power and the power of the assumed PDCCH.

4) And the UE calculates the block error rate of the assumed PDCCH according to the SINR of the assumed PDCCH.

As can be known from the above process, the Pc _ SS parameters corresponding to different CSI-RS resources are different, and therefore, when the network device configures a plurality of CSI-RS resources for the UE, each CSI-RS resource corresponds to one Pc _ SS parameter, and each of the plurality of CSI-RS resources configured by the network device is not spatially QCL with the DMRS on the assumed PDCCH, if the CSI-RS resource selected by the UE from the plurality of CSI-RS resources and the DMRS on the assumed PDCCH are not spatially QCL, based on the Pc _ SS parameter of the CSI-RS resource, the block error rate of the assumed PDCCH cannot be accurately calculated, and finally, beam failure detection cannot be performed, or a detection result is inaccurate.

In addition, when the network device configures the SSB for the UE as the beam failure detection reference signal, there is no effective beam failure detection scheme currently. If no CSI-RS resource is configured for the UE, the UE cannot acquire the underlying PDCCH BLER by measuring the SSB.

In view of the above problems, embodiments of the present invention provide a beam failure detection method, a terminal, and a network device, where the network device sends an SSB to the terminal, and after receiving the SSB, the terminal obtains power of the SSB, then determines a block error rate of an assumed PDCCH of a downlink beam according to the power of the SSB, and finally determines whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam. The terminal of the embodiment of the invention performs beam failure detection on the downlink beam by using the SSB issued by the network equipment, obtains the power of the assumed PDCCH through the power of the SSB and network configuration or predefined parameters, and accurately calculates the block error rate of the assumed PDCCH so as to accurately perform beam failure detection on the downlink beam.

The technical scheme provided by the invention can be applied to various communication systems, such as a 5G communication system, a future evolution system or a plurality of communication convergence systems and the like. A variety of application scenarios may be included, for example, scenarios such as Machine to Machine (M2M), D2M, macro and micro Communication, enhanced Mobile Broadband (eMBB), ultra high reliability and ultra Low Latency Communication (urrllc), and mass internet of things Communication (mtc). These scenarios include, but are not limited to: the communication between the terminals, the communication between the network devices, or the communication between the network devices and the terminals. The embodiment of the invention can be applied to the communication between the network equipment and the terminal in the 5G communication system, or the communication between the terminal and the terminal, or the communication between the network equipment and the network equipment.

Fig. 1 shows a schematic diagram of a possible structure of a communication system according to an embodiment of the present invention. As shown in fig. 1, the communication system includes at least one network device 100 (only one is shown in fig. 1) and one or more terminals 200 to which each network device 100 is connected.

The network device 100 may be a base station, a core network device, a Transmission and Reception node (TRP), a relay station, an access Point, or the like. The network device 100 may be a Base Transceiver Station (BTS) in a Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA) network, or may be an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or may be an eNB or enodeb (evolved nodeb) in LTE. The Network device 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The network device 100 may also be a network device in a 5G communication system or a network device in a future evolution network. The words used are not to be construed as limitations of the invention.

The terminal 200 may be a wireless terminal, which may be a device providing voice and/or other traffic data connectivity to a user, a handheld device having wireless communication functionality, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved PLMN network, etc., as well as a wired terminal. A Wireless terminal may communicate with one or more core networks via a Radio Access Network (RAN), and may be a mobile terminal, such as a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device that exchanges voice and/or data with the RAN, a Personal Communication Service (PCS) telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and the like, or a mobile device, a User Equipment (User Equipment, UE), a UE terminal, an Access terminal, a Wireless Communication device, a terminal unit, a terminal station, a Radio Access Network (wlan), a terminal station, a mobile terminal, a mobile Communication device, a terminal unit, a terminal station, and a mobile terminal, A Mobile Station (Mobile Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Station, a Remote Terminal (Remote Terminal), a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a User Agent (User Agent), a Terminal device, and the like. As an example, in the embodiment of the present invention, fig. 1 illustrates that the terminal is a mobile phone.

The first embodiment is as follows:

fig. 2 shows a schematic flow diagram of a beam failure detection method according to an embodiment of the present invention, and as shown in fig. 2, the beam failure detection method may include:

s201, the network equipment sends the SSB.

The SSB is used for detecting a beam failure of a downlink beam. For example, the downlink beam may be a downlink transmission beam of the network device, and the downlink transmission beam may specifically be a downlink service beam, or the downlink beam may also be a downlink reception beam of the terminal.

Correspondingly, the opposite terminal receives the SSB.

The network device in the embodiment of the present invention may be a network device in the communication system shown in fig. 1, for example, a base station; the terminal in the embodiment of the present invention may be a terminal device in the communication system shown in fig. 1.

In the embodiment of the invention, the network equipment sends the beam failure detection reference signal to the terminal. The beam failure detection reference signal may include only the SSB, or may include the SSB and other reference signals (e.g., CSI-RS) for beam failure detection.

S202, the terminal acquires the power of the SSB.

In the embodiment of the invention, after receiving the beam failure detection reference signal sent by the network equipment through the downlink beam, the terminal judges whether the beam failure detection reference signal is SSB, and if the beam failure detection reference signal is determined to be SSB, the power of the SSB is directly measured to obtain the power of the SSB.

S203, the terminal determines the block error rate of the assumed PDCCH of the downlink beam according to the power of the SSB.

In the embodiment of the invention, the terminal determines the power of the assumed PDCCH of the downlink beam according to the power of the SSB after measuring the power of the SSB on the downlink beam, and then obtains the interference power and the power of the assumed PDCCH of the downlink beam after interference detection, so as to obtain the block error rate of the assumed PDCCH.

S204, the terminal judges whether the downlink wave beam fails according to the error block rate of the assumed PDCCH of the downlink wave beam.

In the embodiment of the present invention, when it is determined that the block error rate of the assumed PDCCH of the downlink beam satisfies a predetermined condition (for example, is greater than a predetermined threshold), it is determined that the downlink beam fails; determining as a beam failure instance (beam failure instance) after all the downlink beams are judged to fail; and if the block error rate of the assumed PDCCH of the downlink beam is judged not to meet the preset condition, judging that the downlink beam is normal.

In one example, when the number of beam failure events continuously detected by the terminal exceeds a predetermined number, it is considered that a beam failure event (beam failure event) occurs currently.

In the embodiment of the present invention, after receiving an SSB issued by a network device, a terminal obtains the power of the SSB, then determines the block error rate of the assumed PDCCH of the downlink beam according to the power of the SSB, and finally determines whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam. The terminal of the embodiment of the invention performs beam failure detection on the downlink beam by using the SSB issued by the network equipment, obtains the power of the generic PDCCH through the power of the SSB and network configuration or predefined parameters, and accurately calculates the block error rate of the generic PDCCH so as to accurately perform beam failure detection on the downlink beam.

In the embodiment of the present invention, when determining the block error rate of the assumed PDCCH of the downlink beam according to the power of the SSB, the block error rate may be determined by the methods shown in the following second and fourth embodiments.

Example two:

fig. 3 is a flowchart illustrating a beam failure detection method according to an embodiment of the present invention. The present embodiment mainly extends the procedure for determining the block error rate of the hypothetical PDCCH. And specifically, the method expands the determination process of determining the block error rate of the assumed PDCCH according to the difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam. As shown in fig. 3, the method comprises the steps of:

s301, the network equipment sends the SSB.

S302, the terminal acquires the power of the SSB.

S303, the terminal determines the power of the assumed PDCCH of the downlink beam according to the power difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam and the power of the SSB.

A first possible implementation:

optionally, before S303, the method further includes the following steps:

s303a, if it is determined that the network device does not configure the CSI-RS resource to the terminal, or if it is determined that the network device configures at least one CSI-RS resource to the terminal and there is no spatial QCL between all CSI-RS resources in the at least one CSI-RS resource and the SSB, the terminal obtains a difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam.

In the embodiment of the invention, when the network equipment does not configure the CSI-RS resource for the terminal, or the network equipment configures the CSI-RS resource for the terminal, but the configured CSI-RS resource is not spatial QCL with the SSB, that is, the measured power of the SSB cannot be taken to derive the power of the CSI-RS with the Pc _ SS parameter, and further the power of the assumed PDCCH cannot be derived based on the power of the CSI-RS. Therefore, in the embodiment of the present invention, by obtaining the difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam, the power of the assumed PDCCH can be directly calculated according to the difference and the power of the SSB.

In an example, the difference between the power of the SSB and the power of the PDCCH assumed for the downlink beam may be predefined, that is, the value of the difference may be specified in the protocol in advance, for example, the difference may be a default fixed value.

In an example, the difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam may also be configured to the terminal by the network device. For example, the network device sends an indication message to the terminal to directly indicate the difference, which may be a default fixed value.

It should be noted that, the spatial QCL relationship between the CSI-RS resource and the SSB may be configured by the network device at the same time when the network device configures the CSI-RS resource for the terminal, or may be configured by the network device alone for the terminal.

A second possible implementation:

optionally, before S303, the method further includes the following steps:

s303b1, the network device sends the first indication information to the terminal.

Correspondingly, the opposite terminal receives the first indication information.

The first indication information is used to indicate a difference between the power of the SSB and the power of the PDCCH assumed for the downlink beam, and the difference may be referred to as a power offset between the SSB and the PDCCH. For example, the difference may be 0dB, Pc _ SS value or other values, and the invention is not limited thereto.

For example, the network device may send the first indication information after or before sending the SSB, which is not limited by the embodiment of the present invention.

S303b2, the terminal obtains, according to the first indication information, a difference between the power of the SSB and the power of the PDCCH supposed for the downlink beam.

In the embodiment of the present invention, the network device may directly configure, through RRC signaling, a difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam for the terminal, and then the terminal calculates the power of the assumed PDCCH according to the difference and the power of the SSB.

S304, the terminal calculates the block error rate of the assumed PDCCH according to the power of the assumed PDCCH.

S305, the terminal judges whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam.

It should be noted that, in the second embodiment, the descriptions (e.g., S301, S302, and S306) related to the first embodiment can refer to the contents of the first embodiment, and are not repeated herein.

According to the beam failure detection method provided by the embodiment of the invention, the terminal obtains the difference value between the power of the SSB and the power of the assumed PDCCH of the downlink beam, so that the power of the assumed PDCCH of the downlink beam is accurately determined according to the difference value and the power of the SSB, and the block error rate of the assumed PDCCH is accurately calculated according to the power of the assumed PDCCH, so that the terminal can finally and accurately detect the beam failure of the downlink beam according to the block error rate of the assumed PDCCH of the downlink beam with higher accuracy.

Example three:

fig. 4 is a flowchart illustrating a beam failure detection method according to an embodiment of the present invention. The present embodiment mainly extends the procedure for determining the block error rate of the hypothetical PDCCH. And specifically, the determination process of the block error rate of the assumed PDCCH is determined and expanded according to the first parameter of the CSI-RS resource which is configured for the terminal by the network equipment and has a QCL relation with the SSB on the space. As shown in fig. 4, the method includes the steps of:

s401, the network equipment sends the SSB.

S402, the terminal acquires the power of the SSB.

S403, the terminal determines the power of the assumed PDCCH of the downlink beam according to the first parameters of X first CSI-RS resources in N first CSI-RS resources of M CSI-RS resources configured for the terminal by the network equipment and the power of the SSB.

In the embodiment of the present invention, before S403, the network device configures M CSI-RS resources for the terminal.

In the embodiment of the present invention, each CSI-RS resource in the M CSI-RS resources corresponds to a first parameter, and the first parameter (i.e., Pc _ SS parameter) corresponding to each CSI-RS resource is a ratio of an energy EPRE of each resource element of the SSB to an EPRE of the corresponding CSI-RS. The M CSI-RS resources include N first CSI-RS resources, which are spatially QCL with the SSB. Wherein M, N, X are positive integers, M is greater than or equal to N, and N is greater than or equal to X.

In the embodiment of the invention, after determining X first CSI-RS resources from N first CSI-RS resources QCL spatially with SSB, the terminal can acquire Pc _ SS parameters of the X first CSI-RS resources, and then calculate the power of the assumed PDCCH of the downlink beam based on the Pc _ SS parameters of the X first CSI-RS resources. Specific calculation methods include, but are not limited to, the following two:

mode 1: the terminal performs statistical averaging on the X Pc _ SS parameters (e.g., averaging the linear values of Pc _ SS), and then calculates the power of the PDCCH supposed for the downlink beam according to the average value.

Mode 2: and the terminal respectively calculates the power of an assumed PDCCH by using each Pc _ SS parameter, then statistically averages the calculated powers of the X assumed PDCCHs, and takes the calculated average as the power of the assumed PDCCH of the downlink beam.

For example, when the terminal calculates the power of the hypothetical PDCCH by using the Pc _ SS parameter of a first CSI-RS resource, the terminal may derive the power of the first CSI-RS resource and the power of the hypothetical PDCCH based on the power of the SSB because the first CSI-RS resource and the SSB spatially QCL. Therefore, the embodiment of the invention can derive the power of the CSI-RS resource by taking the measured power of the SSB and the Pc _ SS parameter, and further calculate the power of the assumed PDCCH based on the power of the CSI-RS resource.

S404, the terminal judges whether the downlink wave beam fails according to the assumed PDCCH block error rate of the downlink wave beam.

A first possible implementation (network device direct indication):

optionally, before S403, the method further includes the following steps:

s403a1, the network device sends the second indication information to the terminal.

Correspondingly, the opposite terminal receives the second indication information.

The second indication information is used for indicating X first CSI-RS resources in the N first CSI-RS resources.

S403a2, the terminal acquires the first parameters of the X first CSI-RS resources according to the indication of the second indication information.

Second possible implementation (terminal self-selection):

optionally, before S403, the method further includes the following steps:

s403b, the terminal selects X first CSI-RS resources from the N first CSI-RS resources, and acquires first parameters of the X first CSI-RS resources.

Further optionally, S403b specifically includes the following contents:

s403b1, the terminal selects X first CSI-RS resources from the N first CSI-RS resources according to a preset rule.

In an embodiment of the present invention, the predetermined rule is: and selecting a first CSI-RS resource corresponding to a predefined CSI-RS resource identification in the N first CSI-RS resources.

Example 1: and selecting X CSI-RS resources with the minimum CSI-RS resource identification in the N first CSI-RS resources.

Example 2: and selecting X CSI-RS resources with the largest CSI-RS resource identification in the N first CSI-RS resources.

Example 3: and selecting X CSI-RS resources with the CSI-RS resource identification as a middle value from the N first CSI-RS resources.

It should be noted that, in the third embodiment, the descriptions (e.g., S401, S402, and S405) related to the first embodiment can refer to the contents of the first embodiment, and are not repeated herein.

According to the beam failure detection method provided by the embodiment of the invention, the network equipment configures M CSI-RS resources for the terminal, wherein the M CSI-RS resources comprise N first CSI-RS resources QCL with SSB in space, the terminal selects X CSI-RS resources from the N first CSI-RS resources, accurately determines the power of the assumed PDCCH of the downlink beam according to the Pc _ SS parameters of the X first CSI-RS resources and the power of the SSB, and further accurately calculates the block error rate of the assumed PDCCH according to the power of the assumed PDCCH, so that the terminal can finally and accurately perform beam failure detection on the downlink beam according to the block error rate of the assumed PDCCH of the downlink beam with higher accuracy.

Example four:

as shown in fig. 5, an embodiment of the present invention provides a terminal 50, where the terminal 50 includes: a receiving module 51, an obtaining module 52, a determining module 53 and a determining module 54, wherein:

a receiving module 51, configured to receive a synchronization signal block SSB; the SSB is used for detecting a beam failure of a downlink beam.

An obtaining module 52, configured to obtain the power of the SSB received by the receiving module 51.

A determining module 53, configured to determine, according to the power of the SSB acquired by the acquiring module 52, a block error rate of a PDCCH, which is an assumed physical downlink control channel of a downlink beam.

A determining module 54, configured to determine whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam determined by the determining module 53.

Optionally, the determining module 53 is specifically configured to: determining the power of the assumed PDCCH of the downlink wave beam according to the difference value between the power of the SSB and the power of the assumed PDCCH of the downlink wave beam and the power of the SSB; and calculating the block error rate of the hypothetical PDCCH according to the power of the hypothetical PDCCH.

Optionally, the obtaining module 52 is further configured to:

if the network equipment is determined not to configure the CSI-RS resource to the terminal, or if the network equipment is determined to configure at least one CSI-RS resource to the terminal, and a spatial quasi co-location QCL does not exist between all CSI-RS resources in the at least one CSI-RS resource and the SSB, obtaining a difference value between the power of the SSB and the power of the assumed PDCCH of the downlink beam.

Optionally, as shown in fig. 5, the terminal 50 further includes: a receiving module 55, wherein:

a receiving module 55, configured to receive first indication information from a network device; the first indication information is used to indicate a difference between the power of the SSB and the power of the PDCCH assumed for the downlink beam.

The determining module 53 is further configured to obtain the difference value according to the first indication information.

Optionally, the difference is predefined.

Optionally, the determining module 53 is further configured to determine the power of the assumed PDCCH of the downlink beam according to the first parameter of X first CSI-RS resources of N first CSI-RS resources of M CSI-RS resources configured by the network device for the terminal and the power of the SSB, where each CSI-RS resource of the M CSI-RS resources corresponds to one first parameter, and the first parameter corresponding to each CSI-RS resource is a ratio of an energy EPRE of each resource element of the SSB to an EPRE of the corresponding CSI-RS; the N first CSI-RS resources and the SSB are QCL in space, M, N and X are positive integers, M is larger than or equal to N, and N is larger than or equal to X.

Optionally, the receiving module 55 is further configured to receive second indication information from the network device, where the second indication information is used to indicate X first CSI-RS resources in the N first CSI-RS resources; and acquiring first parameters of X first CSI-RS resources according to the indication of the second indication information.

Or,

optionally, the obtaining module 52 is further configured to select X first CSI-RS resources from the N first CSI-RS resources, and obtain first parameters of the X first CSI-RS resources.

Optionally, the obtaining module 52 is further configured to select X first CSI-RS resources from the N first CSI-RS resources according to a predetermined rule.

Further optionally, the predetermined rule is: and selecting a first CSI-RS resource corresponding to a predefined CSI-RS resource identification in the N first CSI-RS resources.

The terminal device provided in the embodiment of the present invention can implement the process shown in any one of fig. 2 to 4 in the method embodiment, and details are not described here again to avoid repetition.

In the terminal provided in the embodiment of the present invention, after receiving the SSB issued by the network device, the terminal obtains the power of the SSB, then determines the block error rate of the assumed PDCCH of the downlink beam according to the power of the SSB, and finally determines whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam. The terminal of the embodiment of the invention performs beam failure detection on the downlink beam by using the SSB issued by the network equipment, obtains the power of the generic PDCCH through the power of the SSB and network configuration or predefined parameters, and accurately calculates the block error rate of the generic PDCCH so as to accurately perform beam failure detection on the downlink beam.

Example five:

fig. 6 is a schematic diagram of a hardware structure of a network device for implementing an embodiment of the present invention, where the network device 60 includes: a sending module 61, wherein:

a sending module 61, configured to send the synchronization signal block SSB.

Wherein, the SSB is used for beam failure detection of a downlink beam; the SSB is used for indicating the terminal to acquire the power of the SSB, determining the block error rate of the PDCCH of the downlink beam according to the power of the SSB, and judging whether the downlink beam fails according to the block error rate of the PDCCH of the downlink beam.

Optionally, the sending module 61 is further configured to send the first indication information to the terminal.

The first indication information is used for indicating a difference value between the power of the SSB and the power of the assumed PDCCH of the downlink beam, and the difference value is used for indicating the terminal to obtain the block error rate of the assumed PDCCH according to the difference value.

Further optionally, the difference is predefined.

Optionally, the sending module 61 is further configured to configure M CSI-RS resources to the terminal.

Each CSI-RS resource in the M CSI-RS resources corresponds to a first parameter, and the first parameter corresponding to each CSI-RS resource is the ratio of the energy EPRE of each resource element of the SSB to the EPRE of the corresponding CSI-RS; the M CSI-RS resources comprise N first CSI-RS resources, and the N first CSI-RS resources and the SSB are QCL in space; the N CSI-RS resources are used for instructing the terminal to determine the power of the assumed PDCCH of the downlink beam according to the first parameter of X first CSI-RS resources of the N first CSI-RS resources and the power of the SSB, M, N, X are positive integers, M is greater than or equal to N, and N is greater than or equal to X.

Further optionally, the sending module 61 is further configured to send second indication information to the terminal; the second indication information is used for indicating X first CSI-RS resources in the N first CSI-RS resources.

The network device provided by the embodiment of the invention can obtain the power of the SSB after the terminal receives the SSB by sending the SSB to the terminal, then determine the block error rate of the assumed PDCCH of the downlink beam according to the power of the SSB, and finally determine whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam. The terminal of the embodiment of the invention performs beam failure detection on the downlink beam by using the SSB issued by the network equipment, obtains the power of the generic PDCCH through the power of the SSB and network configuration or predefined parameters, and accurately calculates the block error rate of the generic PDCCH so as to accurately perform beam failure detection on the downlink beam.

Example six:

fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present invention, where the terminal 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 7010, and a power supply 7011. Those skilled in the art will appreciate that the terminal configuration shown in fig. 7 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 701 is configured to receive a synchronization signal block SSB; wherein, the SSB is used for the beam failure detection of the downlink beam; the processor 7010 is configured to obtain power of the SSB received by the radio frequency unit 701, determine a block error rate of a PDCCH (physical downlink control channel) of a downlink beam according to the power of the SSB, and determine whether the downlink beam fails according to the block error rate of the PDCCH of the downlink beam.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 7010; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 may also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 702, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output related to a specific function performed by the terminal 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.

The input unit 704 is used to receive audio or video signals. The input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 706. The image frames processed by the graphic processor 7041 may be stored in the memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 701 in case of a phone call mode.

The terminal 700 also includes at least one sensor 705, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or a backlight when the terminal 700 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in multiple directions (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal attitude (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 706 is used to display information input by the user or information provided to the user. The Display unit 706 may include a Display panel 7061, and the Display panel 7061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 707 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 7010, and receives and executes commands sent from the processor 7010. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 7010 to determine the type of the touch event, and then the processor 7010 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although the touch panel 7071 and the display panel 7061 are shown in fig. 7 as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 708 is an interface for connecting an external device to the terminal 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 700 or may be used to transmit data between the terminal 700 and the external device.

The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 709 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 7010 is a control center of the terminal, connects various parts of the entire terminal by various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby integrally monitoring the terminal. The processor 7010 may include one or more processing units; preferably, the processor 7010 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 7010.

The terminal 700 may further include a power supply 7011 (e.g., a battery) for powering the various components, and preferably, the power supply 7011 may be logically coupled to the processor 7010 via a power management system that provides functionality for managing charging, discharging, and power consumption.

In addition, the terminal 700 includes some functional modules that are not shown, and are not described in detail herein.

Example seven:

fig. 8 is a schematic hardware structure diagram of a network device for implementing an embodiment of the present invention, where the network device 800 includes: a processor 801, a transceiver 802, a memory 803, a user interface 804 and a bus interface.

The transceiver 802 is configured to transmit a synchronization signal block SSB; wherein, the SSB is used for beam failure detection of a downlink beam; the SSB is used for indicating the terminal to acquire the power of the SSB, determining the block error rate of the assumed PDCCH of the downlink beam according to the power of the SSB, and judging whether the downlink beam fails according to the block error rate of the assumed PDCCH of the downlink beam.

In the embodiment of the present invention, in fig. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by the processor 801 and various circuits of the memory represented by the memory 803 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 802 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 804 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 may store data used by the processor 801 in performing operations.

In addition, the network device 800 further includes some functional modules that are not shown, and are not described herein again.

Example eight:

optionally, an embodiment of the present invention further provides a terminal, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements the process of the random access method in the first embodiment, and can achieve the same technical effect, and details are not repeated here to avoid repetition.

Optionally, an embodiment of the present invention further provides a network device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements the process of the random access method in the first embodiment, and can achieve the same technical effect, and details are not repeated here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements multiple processes of the random access method in the foregoing embodiments, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements a plurality of processes of the foregoing random access method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer readable storage medium is, for example, ROM, RAM, magnetic disk or optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for detecting beam failure is applied to a terminal, and comprises the following steps:

acquiring the power of the SSB;

determining the power of a Physical Downlink Control Channel (PDCCH) assumed by the downlink wave beam according to the power of the SSB;

calculating the block error rate of the assumed PDCCH of the downlink wave beam based on the power of the assumed PDCCH of the downlink wave beam;

2. The method of claim 1, wherein the determining the power of the PDCCH for the downlink beam according to the power of the SSB comprises:

and determining the power of the assumed PDCCH of the downlink wave beam according to the difference value between the power of the SSB and the power of the assumed PDCCH of the downlink wave beam and the power of the SSB.

3. The method of claim 2, wherein before determining the power of the assumed PDCCH for the downlink beam according to the difference between the power of the SSB and the power of the assumed PDCCH for the downlink beam and the power of the SSB, the method further comprises:

if it is determined that the network device does not configure the CSI-RS resource to the terminal, or if it is determined that the network device configures at least one CSI-RS resource to the terminal and a spatially quasi co-located QCL does not exist between all CSI-RS resources in the at least one CSI-RS resource and the SSB, obtaining a difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam.

4. The method according to claim 2 or 3, wherein before determining the power of the assumed PDCCH of the downlink beam according to the power of the SSB and the power of the assumed PDCCH of the downlink beam, the method further comprises:

receiving first indication information from a network device; wherein the first indication information is used for indicating a difference value between the power of the SSB and the power of the assumed PDCCH of the downlink beam;

and acquiring the difference value according to the first indication information.

5. The method of claim 3, wherein the difference value is predefined.

6. The method of claim 1, wherein the determining the power of the PDCCH for the downlink beam according to the power of the SSB comprises:

determining the power of the assumed PDCCH of the downlink beam according to the first parameters of X first CSI-RS resources in N first CSI-RS resources of M CSI-RS resources configured for the terminal by network equipment and the power of the SSB;

each CSI-RS resource in the M CSI-RS resources corresponds to a first parameter, and the first parameter corresponding to each CSI-RS resource is the ratio of the energy EPRE of each resource element of the SSB to the EPRE of the corresponding CSI-RS; the N first CSI-RS resources are spatially QCL with the SSB; m, N, X are all positive integers, M is greater than or equal to N, and N is greater than or equal to X.

7. The method according to claim 6, wherein before determining the power of the hypothetical PDCCH for the downlink beam according to the first parameter of X first CSI-RS resources of N first CSI-RS resources of M CSI-RS resources configured for the terminal by the network device and the power of the SSB, the method further comprises:

receiving second indication information from the network device, the second indication information indicating X first CSI-RS resources of the N first CSI-RS resources; acquiring first parameters of the X first CSI-RS resources according to the indication of the second indication information;

or,

selecting X first CSI-RS resources from the N first CSI-RS resources, and acquiring first parameters of the X first CSI-RS resources.

8. The method of claim 7, wherein selecting X first CSI-RS resources from the N first CSI-RS resources comprises:

and selecting X first CSI-RS resources from the N first CSI-RS resources according to a preset rule.

9. The method of claim 8, wherein the predetermined rule is: and selecting a first CSI-RS resource corresponding to a predefined CSI-RS resource identification in the N first CSI-RS resources.

10. A beam failure detection method is applied to a network device, and comprises the following steps:

sending a synchronization signal block SSB; wherein, the SSB is used for beam failure detection of a downlink beam; the power of the SSB is used for determining the power of a PDCCH (physical downlink control channel) of the downlink beam; the power of the hypothetical PDCCH is used for calculating the block error rate of the hypothetical PDCCH; the block error rate of the hypothetical PDCCH is used for judging whether the downlink beam fails.

11. The method of claim 10, further comprising:

sending first indication information to a terminal; the first indication information is used for indicating a difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam, and the difference is used for indicating the terminal to obtain the block error rate of the assumed PDCCH according to the difference.

12. The method of claim 11, wherein the difference is predefined.

13. The method of claim 10, further comprising:

configuring M CSI-RS resources to a terminal;

each CSI-RS resource in the M CSI-RS resources corresponds to a first parameter, and the first parameter corresponding to each CSI-RS resource is the ratio of the energy EPRE of each resource element of the SSB to the EPRE of the corresponding CSI-RS; the M CSI-RS resources include N first CSI-RS resources that are each spatially QCL with the SSB; the N CSI-RS resources are used to instruct the terminal to determine the power of the assumed PDCCH of the downlink beam according to the first parameter of X first CSI-RS resources of the N first CSI-RS resources and the power of the SSB, M, N, X are positive integers, M is greater than or equal to N, and N is greater than or equal to X.

14. The method of claim 13, wherein after configuring M CSI-RS resources for the terminal, the method further comprises:

sending second indication information to the terminal; wherein the second indication information is used for indicating X first CSI-RS resources in the N first CSI-RS resources.

15. A terminal, comprising:

a determining module, configured to determine, according to the power of the SSB acquired by the acquiring module, the power of the assumed physical downlink control channel PDCCH of the downlink beam, and calculate, based on the power of the assumed PDCCH of the downlink beam, a block error rate of the assumed PDCCH of the downlink beam;

16. The terminal according to claim 15, wherein the determining module is specifically configured to:

determining the power of the assumed PDCCH of the downlink wave beam according to the difference value between the power of the SSB and the power of the assumed PDCCH of the downlink wave beam and the power of the SSB;

and calculating the block error rate of the assumed PDCCH according to the power of the assumed PDCCH.

17. The terminal of claim 16, wherein the obtaining module is further configured to:

if it is determined that the network device does not configure the CSI-RS resource to the terminal, or if it is determined that the network device configures at least one CSI-RS resource to the terminal and a spatial quasi co-location QCL does not exist between all CSI-RS resources in the at least one CSI-RS resource and the SSB, obtaining a difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam.

18. The terminal according to claim 16 or 17, characterized in that the terminal further comprises:

the receiving module is used for receiving first indication information from the network equipment; wherein the first indication information is used for indicating a difference value between the power of the SSB and the power of the assumed PDCCH of the downlink beam;

the determining module is further configured to obtain the difference value according to the first indication information.

19. The terminal of claim 17, wherein the difference is predefined.

20. The terminal of claim 15,

the determining module is further configured to determine, according to the first parameters of X first CSI-RS resources of N first CSI-RS resources of M CSI-RS resources configured for the terminal by the network device and the power of the SSB, the power of the assumed PDCCH of the downlink beam; each CSI-RS resource in the M CSI-RS resources corresponds to a first parameter, and the first parameter corresponding to each CSI-RS resource is the ratio of the energy EPRE of each resource element of the SSB to the EPRE of the corresponding CSI-RS; the N first CSI-RS resources are spatially QCL with the SSB; m, N, X are all positive integers, M is greater than or equal to N, and N is greater than or equal to X.

21. The terminal of claim 20,

the receiving module is further configured to receive second indication information from the network device, where the second indication information is used to indicate X first CSI-RS resources of the N first CSI-RS resources; acquiring first parameters of the X first CSI-RS resources according to the indication of the second indication information;

or,

the obtaining module is further configured to select X first CSI-RS resources from the N first CSI-RS resources, and obtain first parameters of the X first CSI-RS resources.

22. The terminal of claim 21,

the obtaining module is further configured to select X first CSI-RS resources from the N first CSI-RS resources according to a predetermined rule.

23. The terminal according to claim 22, wherein the predetermined rule is: and selecting a first CSI-RS resource corresponding to a predefined CSI-RS resource identification in the N first CSI-RS resources.

24. A network device, comprising:

a sending module, configured to send a synchronization signal block SSB; wherein, the SSB is used for beam failure detection of a downlink beam; the power of the SSB is used for determining the power of a PDCCH (physical downlink control channel) of the downlink beam; the power of the hypothetical PDCCH is used for calculating the block error rate of the hypothetical PDCCH; the block error rate of the hypothetical PDCCH is used for judging whether the downlink beam fails.

25. The network device of claim 24,

the sending module is further configured to send first indication information to the terminal; the first indication information is used for indicating a difference between the power of the SSB and the power of the assumed PDCCH of the downlink beam, and the difference is used for indicating the terminal to obtain the block error rate of the assumed PDCCH according to the difference.

26. The network device of claim 25, wherein the difference is predefined.

27. The network device of claim 24,

the sending module is further configured to configure M CSI-RS resources to the terminal;

28. The network device of claim 27,

the sending module is further configured to send second indication information to the terminal; wherein the second indication information is used for indicating X first CSI-RS resources in the N first CSI-RS resources.

29. A terminal comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the beam failure detection method according to any one of claims 1 to 9.

30. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the beam failure detection method according to any one of claims 10 to 14.

31. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the beam failure detection method according to any one of claims 1 to 14.