CN110034832B

CN110034832B - Method and terminal equipment for monitoring channel quality

Info

Publication number: CN110034832B
Application number: CN201810032507.3A
Authority: CN
Inventors: 施弘哲; 蒋鹏; 毕晓艳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-01-12
Filing date: 2018-01-12
Publication date: 2020-08-07
Anticipated expiration: 2038-01-12
Also published as: CN110034832A; WO2019137346A1

Abstract

The method comprises the steps that when the terminal device is initially accessed, a plurality of synchronous signal blocks sent by a network device are received through a plurality of channels, when the terminal device does not receive a first signaling and a second signaling used for monitoring the channel quality, M synchronous signal blocks are determined from the plurality of synchronous signal blocks received in the initial access process so as to carry out quality monitoring on the M channels corresponding to the M synchronous signal blocks one by one, the first signaling carries at least one period for sending CSI-RS resources for monitoring the channel quality, the second signaling comprises at least one quasi-co-location QC L information index associated with a control channel demodulation reference signal, the QC L information index is used for determining a reference signal, and the reference signal is used for monitoring the channel quality.

Description

Method and terminal equipment for monitoring channel quality

Technical Field

The present application relates to the field of communications, and more particularly, to a method and a terminal device for monitoring channel quality.

Background

New Radio (NR) supports high frequency transmission, greatly widening available frequency resources, but path loss at high frequency is more severe than that at low frequency, so that it is necessary to increase array gain by beamforming technology to ensure coverage of a cell. In this case, robustness (Robust) of the communication system based on beam access needs to be tested, for example, in case of mismatch of the transmitting and receiving beam pairing between the network device and the terminal device due to movement or rotation of the terminal device, if quick recovery is not possible, transmission of the communication system may be greatly affected or even disconnected, and then a request for connection recovery of a higher layer is required.

In the process of recovering the transceiving Beam pairing, Beam Failure Detection (BFD) is included, the Beam mismatch detection can be determined by monitoring the channel quality, and the monitoring of the channel quality is realized by measuring one or more reference signals. The existing terminal device determines a reference signal based on a signaling sent by a network device, and when the network device is not configured with a corresponding signaling, the terminal device cannot determine the reference signal and further cannot recover channel quality, so that how to monitor the channel quality when the terminal device does not receive the signaling sent by the network device becomes an urgent problem to be solved.

Disclosure of Invention

The application provides a method for monitoring channel quality and a terminal device, wherein the terminal device can determine a reference signal to complete channel quality monitoring when a signaling sent by a network device is not received.

In a first aspect, a method for monitoring channel quality is provided, including: when the terminal equipment is initially accessed, a plurality of synchronous signal blocks sent by the network equipment are received through a plurality of channels; when the terminal equipment does not receive a first signaling and a second signaling which are sent by the network equipment and used for monitoring the channel quality, determining M synchronous signal blocks from a plurality of synchronous signal blocks received in the initial access process so as to monitor the quality of M channels corresponding to the M synchronous signal blocks one by one; m is an integer greater than or equal to 1; the first signaling carries an index of a channel state information reference signal (CSI-RS) resource sent in at least one period, where the CSI-RS resource is used to monitor channel quality;

the second signaling comprises at least one Quasi-co-location (QC L) information index associated with a control channel demodulation reference signal, wherein the QC L information index is used for determining a reference signal, and the reference signal is used for monitoring channel quality.

When terminal equipment is initially accessed, a plurality of synchronous signal blocks sent by network equipment are received through N channels, each synchronous signal block corresponds to one channel, each synchronous signal block is borne on the corresponding channel, wherein N is an integer greater than or equal to 1; after the initial access is completed, when the terminal device does not receive the first signaling and the second signaling sent by the network device, monitoring the quality of a channel corresponding to each of the M synchronization signal blocks according to the M synchronization signal blocks in the synchronization signal blocks, where M is an integer greater than or equal to 1.

According to the method for monitoring channel quality of the embodiment of the application, when the network device is not configured with the first signaling and the second signaling, the terminal device can use at least one synchronization signal block (synchronous & PBCH block, SS/PBCH B L OCK) monitored when the terminal device is initially accessed to the network device as a reference signal for monitoring channel quality (also referred to as a reference signal in the application), and monitor the quality of a channel corresponding to each SS/PBCH B L OCK.

The reference signal described in this application is used to monitor channel quality, and when a beam pair corresponding to a channel is mismatched when a beam of the corresponding channel is accurately paired as a standard where the quality of a normal channel is when the quality of the beam-based channel is introduced in NR to support high-frequency communication, that is, when the channel is monitored in this application, the obtained result of the channel quality may reflect the quality of the beam pair between a terminal device and a network device corresponding to the channel, and the reference signal described in this application may correspond to a BFD reference signal in an existing protocol.

With reference to the first aspect, in an implementation manner of the first aspect, the determining of the value of M synchronization signal blocks from the plurality of synchronization signal blocks includes:

optionally, the value of M is determined according to the capability of the terminal device, that is, different terminal devices determine the value of M according to their own capabilities, and can determine different M for different terminal devices, thereby supporting the diversity of the terminal devices;

optionally, the value of M is specified by the communication protocol, that is, the communication system uniformly specifies the value of M, thereby reducing signaling overhead;

optionally, the value of M is indicated by the network device, that is, the network device may indicate different values of M according to different communication states, which increases flexibility of processing.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, when the value of M is 1, the method further includes: the terminal device uses the synchronization signal block selected in the initial access for association and transmission of a random access channel (RACH/random access channel) as the M synchronization signal blocks, which are used as reference signals for channel quality monitoring, i.e., the reference signals mentioned above.

According to the method for monitoring the channel quality, the terminal device can use the synchronization signal block used for random access channel association and transmission in initial access as a reference signal for monitoring the channel quality, so that the terminal device has at least one channel quality monitoring reference signal which can be cited anyway. Since the synchronization signal block received by the terminal device is determined at the time of initial access, channel quality monitoring can be accomplished on this basis.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the M synchronization signal blocks satisfy at least one of the following conditions:

optionally, the M synchronization signal blocks are M synchronization signal blocks with the maximum received power among the synchronization signal blocks corresponding to the N channels,

optionally, the M synchronization signal blocks are M synchronization signal blocks with highest signal reception quality among the synchronization signal blocks corresponding to the N channels,

optionally, the M synchronization signal blocks are M synchronization signal blocks with the highest signal-to-noise ratio or signal-to-interference-and-noise ratio in the synchronization signal blocks corresponding to the N channels.

According to the method for monitoring channel quality in the embodiment of the present application, optionally, N candidate synchronization signal blocks are determined according to the plurality of synchronization signal blocks, and may be 1 synchronization signal block with the highest reference signal received power, reference signal received quality, signal-to-noise ratio, or signal-to-interference-and-noise ratio of the plurality of synchronization signal blocks received by each channel, so that N candidate synchronization signal blocks can be determined by the N channels, wherein the selection of the M SS/PBCH B L OCKs may be determined according to the received power, received quality, or signal-to-noise ratio of the N SS/PBCH B L OCKs monitored when the terminal device is initially accessed to the network device, and according to the rule of selection of the M SS/PBCH B L OCKs in the present application, the SS/PBCH B L OCK with the better channel quality can be selected as the reference signal for monitoring channel quality, thereby increasing the accuracy of monitoring channel quality.

In a second aspect, a method for monitoring channel quality is provided, including: the terminal equipment receives a plurality of reference signals sent by the network equipment through a plurality of channels in P reference signal sending periods;

when the terminal equipment does not receive a first signaling and a second signaling which are sent by the network equipment and used for monitoring the channel quality, determining Q reference signals from a plurality of reference signals received in the P reference signal sending periods so as to monitor the quality of Q channels corresponding to the Q reference signals one by one; p and Q are integers greater than or equal to 1;

the first signaling carries an index of a channel state information reference signal (CSI-RS) resource sent in at least one period, and the CSI-RS resource is used for monitoring the channel quality;

the second signaling comprises at least one quasi-co-located QC L information index associated with a control channel demodulation reference signal, the QC L information index is used for determining a reference signal, and the reference signal is used for monitoring channel quality.

The method comprises the steps that a terminal device receives a plurality of reference signals sent by a network device through K channels in P reference signal sending periods, wherein each reference signal corresponds to one channel, P is an integer larger than or equal to 1, and K is an integer larger than or equal to 1; when the first signaling and the second signaling sent by the network equipment are not received, the terminal equipment determines Q reference signals according to the multiple reference signals, wherein the Q reference signals correspond to Q channels one to one, Q is an integer greater than or equal to 1, and Q is less than or equal to K.

According to the method for monitoring the channel quality, when the network device is not configured with the first signaling and the second signaling, the terminal device receives a plurality of reference signals through K channels in P periods when communicating with the network device, and monitors the quality of the channel corresponding to each reference signal by taking Q reference signals in the plurality of reference signals as the reference signals of the Q channels. That is, the method for monitoring channel quality according to the present application can complete monitoring of channel quality when the first signaling and the second signaling are not received, and timely require recovery when the channel quality does not meet the preset requirement, so as to ensure the transmission quality of the communication system.

With reference to the second aspect, in an implementation manner of the second aspect, the determining of the value of P includes:

optionally, the value of P is determined according to the capability of the terminal device, that is, different terminal devices determine the value of P according to their own capabilities, and can determine different P for different terminal devices, thereby supporting the diversity of terminal devices;

optionally, the value of P is specified by the communication protocol, that is, the communication system specifies the value of P uniformly, thereby reducing signaling overhead;

optionally, the value of P is indicated by the network device, that is, the network device may indicate different values of P according to different communication states, which increases the flexibility of processing.

With reference to the second aspect and the foregoing implementation manner of the second aspect, in another implementation manner of the second aspect, in determining Q reference signals from multiple reference signals received in the P reference signal transmission periods, the determining of the value of Q includes:

the value of the Q is determined according to the capability of the terminal equipment, namely, different terminal equipment determines the value of the Q according to the capability of the terminal equipment, different Q can be determined aiming at different terminal equipment, and the diversity of the terminal equipment is supported;

optionally, the value of Q is specified by a communication protocol, that is, the communication system specifies the value of Q uniformly, thereby reducing signaling overhead;

optionally, the value of Q is indicated by the network device, that is, the network device may indicate different values of Q according to different communication states, which increases the flexibility of processing.

With reference to the second aspect and the foregoing implementation manner of the second aspect, in another implementation manner of the second aspect, the Q reference signals satisfy at least one of the following conditions: the Q reference signals are Q reference signals with the largest reference signal receiving power among the reference signals corresponding to the N channels, the Q reference signals are Q reference signals with the highest reference signal receiving quality among the reference signals corresponding to the N channels, and the Q reference signals are Q reference signals with the highest signal-to-noise ratio or signal-to-interference-and-noise ratio among the reference signals corresponding to the N channels. According to the method for monitoring channel quality in the embodiment of the present application, the selection of Q reference signals may be determined according to the received power, the received quality, or the signal-to-noise ratio of multiple reference signals monitored in P periods when the terminal device communicates with the network device, P reference signals are obtained by monitoring in P periods for each channel, but finally, the reference signal with the largest received power, received quality, or signal-to-noise ratio is selected from the P reference signals as the reference signal of the channel, so that N reference signals are selected for the N channels, and Q reference signals with larger received power, received quality, or signal-to-noise ratio are selected from the N reference signals as the reference signals in the present application. According to the selection rule of the Q reference signals, the reference signals with better quality can be selected as the reference signals for monitoring the channel quality, and the accuracy for monitoring the channel quality is improved.

In a third aspect, a method for monitoring channel quality is provided, wherein the method comprises that a terminal device monitors whether a preset condition is met, and when the preset condition is met, the terminal device monitors the channel quality, wherein the preset condition comprises at least one of the following conditions that the terminal device receives a first signaling sent by a network device, the first signaling comprises at least one index of a CSI-RS resource sent periodically, the CSI-RS resource is used for monitoring the channel quality, the second condition that the terminal device does not receive the first signaling, and the terminal device receives a second signaling sent by the network device, the second signaling comprises at least one quasi-co-location QC L information index associated with a control channel demodulation reference signal, the QC L information index is used for determining a reference signal, the reference signal is used for monitoring the channel quality, the third condition that the first signaling and the second signaling are received within a specified time window, and the terminal device supports an aspect of sending the reference signal such as the reference signal or the reference signal in the aspect of the reference signal received initially received or the aspect of the specified time window.

According to the method for monitoring the channel quality, the activation condition for monitoring the channel quality by the terminal equipment is provided, for example, the terminal equipment can receive the first signaling and/or the second signaling, or the terminal equipment can start monitoring the channel quality when the first signaling and the second signaling are not received, so that the terminal equipment can monitor the channel quality when the first signaling and the second signaling are not received, and the communication quality is enhanced.

And optionally, in order to avoid that the terminal device does not receive the first signaling and the second signaling within the time window due to the delay of the information and immediately starts to use the default fallback mechanism to monitor the channel quality, a reasonable preset time window is set, and the duration of the time window can be specified by the communication protocol, determined according to the capability of the terminal device, or indicated by the network device, so that it is ensured that the terminal device can monitor the channel quality when the first signaling and the second signaling are not received, and the monitoring of the channel quality by using the first signaling or the second signaling is also avoided due to the delay of the information.

With reference to the third aspect, in an implementation manner of the third aspect, the method further includes: the terminal device receives first indication information sent by the network device, wherein the first indication information is used for indicating the starting time of the time window.

According to the method for monitoring the channel quality, the terminal equipment can use the time indicated by the network equipment as the starting time of the preset waiting time, and the accuracy of the waiting time is ensured.

With reference to the third aspect, in an implementation manner of the third aspect, the method further includes: and the terminal equipment determines the starting time of the time window according to the sending time interval of the uplink information.

According to the method for monitoring the channel quality, the terminal equipment can use the sending time interval of the uplink information to determine the starting time of the preset waiting time, and the accuracy of the waiting time is guaranteed because the sending time interval of the uplink information can be known by the terminal equipment.

In a fourth aspect, a terminal device is provided, configured to perform the method in the first to third aspects or any possible implementation manner of the first to third aspects. In particular, the terminal device comprises means for performing the method of the first to third aspects or any one of the possible implementations of the first to third aspects described above.

In a fifth aspect, a network device is provided for communicating with the terminal device.

In a sixth aspect, a terminal device is provided that includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transceive signals, the memory is configured to store a computer program, and the processor is configured to call and run the computer program from the memory, so that the terminal device performs the method in any one of the possible implementation manners of the first to third aspects and the first to third aspects.

In a seventh aspect, a network device is provided that includes a transceiver, a processor, and a memory. The processor is used for controlling the transceiver to transmit and receive signals, the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory.

In an eighth aspect, a communication system is provided, which includes the terminal device provided in the fourth aspect and the network device provided in the fifth aspect, or includes the terminal device provided in the sixth aspect and the network device provided in the seventh aspect.

In a ninth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the above-mentioned aspects.

In a tenth aspect, a computer-readable storage medium is provided for storing a computer program comprising instructions for performing the method in the above aspects.

In an eleventh aspect, there is provided a chip system comprising a processor for invoking and running the computer program from a memory, the computer program for implementing the method in the above aspects.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system 100 suitable for use with embodiments of the present application;

FIG. 2 is a schematic flow diagram of a method of monitoring channel quality;

fig. 3 is a schematic flow chart of a method for monitoring channel quality according to an embodiment of the present application;

fig. 4 is another schematic flow chart of a method for monitoring channel quality provided by an embodiment of the present application;

fig. 5 is another schematic flow chart of a method for monitoring channel quality provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of a time window of an embodiment of the present application;

fig. 7 is a schematic diagram of an embodiment of starting to monitor channel quality according to an embodiment of the present application;

fig. 8 is a schematic block diagram of a terminal device provided in an embodiment of the present application;

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

fig. 10 is a schematic block diagram of a network device provided in an embodiment of the present application.

Detailed Description

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

The technical solution of the embodiment of the present application can be applied to various communication systems, such as global System for Mobile communication (GSM) System, Code Division Multiple Access (CDMA) System, Wideband Code Division Multiple Access (WCDMA) System, General Packet Radio Service (GPRS) System, long term evolution (L ong evolution, &ttttranslation = L &tttte) System, L TE Frequency Division Duplex (UMTS) System, L TE Time Division Duplex (TDD Duplex, TDD), Universal Mobile communication System (Universal Mobile communication, UMTS), Worldwide interoperability (UMTS) System, WiMAX (Worldwide interoperability for Microwave Access (WiMAX) System, future Generation Radio network (NR 5) System, and so on.

The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless local loop (Wireless L o cal L op, W LL) station, a Personal Digital Assistant (PDA), a handheld device having a Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G Network, or a terminal device in a future evolved Public land Mobile Network (Network L and Mobile, P L MN), and so on, which are not limited by the embodiments of the present application.

The Network device in this embodiment may be a device for communicating with a terminal device, where the Network device may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, may also be a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, may also be an evolved node b (eNB, or eNodeB) in an L TE System, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay Station, an Access point, a vehicle-mounted device, a wearable device, a Network device in a future 5G Network, or a Network device in a future evolved P L MN Network, and the like, and the present embodiment is not limited.

Fig. 1 is a schematic diagram of a wireless communication system suitable for use with embodiments of the present application. The communication system 100 includes a network device 102, and the network device 102 may include 1 antenna or multiple antennas, e.g.,

antennas

104, 106, 108, 110, 112, and 114. Additionally, network device 102 can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.

Network device 102 may communicate with a plurality of terminal devices, such as terminal device 116 and terminal device 122. However, it is understood that network device 102 may communicate with any number of terminal devices similar to terminal device 116 or terminal device 122.

End devices

116 and 122 can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.

As shown in fig. 1, terminal device 116 is in communication with

antennas

112 and 114, where

antennas

112 and 114 transmit information to terminal device 116 over a forward link (also called a downlink) 118 and receive information from terminal device 116 over a reverse link (also called an uplink) 120. In addition, terminal device 122 is in communication with

antennas

104 and 106, where

antennas

104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

In a Frequency Division Duplex (FDD) system, forward link 118 can utilize a different Frequency band than reverse link 120, and forward link 124 can employ a different Frequency band than reverse link 126, for example.

As another example, in Time Division Duplex (TDD) systems and Full Duplex (Full Duplex) systems, forward link 118 and reverse link 120 may use a common frequency band and forward link 124 and reverse link 126 may use a common frequency band.

Each antenna (or group of antennas consisting of multiple antennas) and/or area designed for communication is referred to as a sector of network device 102. For example, antenna groups may be designed to communicate to terminal devices in a sector of the areas covered by network device 102. A network device may transmit signals to all terminal devices in its corresponding sector through single-antenna or multi-antenna transmit diversity. During communication by network device 102 with

terminal devices

116 and 122 over

forward links

118 and 124, respectively, the transmitting antennas of network device 102 may also utilize beamforming to improve signal-to-noise ratio of

forward links

118 and 124. Moreover, mobile devices in neighboring cells can experience less interference when network device 102 utilizes beamforming to transmit to

terminal devices

116 and 122 scattered randomly through an associated coverage area, as compared to a manner in which the network device transmits signals to all of its terminal devices through single-antenna or multi-antenna transmit diversity.

At a given time, network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting apparatus and/or a wireless communication receiving apparatus. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or save in memory, etc.) a number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.

In addition, the communication system 100 may be a P L MN network, a D2D network, an M2M network, or other networks, fig. 1 is a simplified schematic diagram of an example, and other network devices or terminal devices may be included in the network, which is not shown in fig. 1.

How to determine the reference signal according to the embodiment of the present invention is described in detail based on the application scenario of fig. 1.

In the communication system 100 shown in fig. 1, optionally, taking an NR communication system as an example in this application, in order to ensure coverage of the network device 102, the gain of the antenna array may be increased through a beamforming technique, where beamforming is a signal preprocessing technique based on the antenna array, and the beamforming generates a beam with directivity by adjusting a weighting coefficient of each array element in the antenna array, so that an obvious array gain can be obtained.

To understand, the signal-to-noise ratio is taken as an example to briefly describe the problem of the antenna array gain, for a channel, the error rate of information content transmitted on the channel can indirectly indicate the quality of the channel, and for the signal-to-noise ratio as an example, the greater the channel energy, the greater the signal-to-noise ratio, the smaller the error rate of information transmitted on the channel, that is, the better the channel quality, and for the beam, if the transmission beam of the transmitting end device is well paired with the reception beam of the receiving end device, the beam forming gain (beam forming gain) is obtained for the channel corresponding to the beam pair (beampair), so that the signal reception power can be increased, the signal-to-noise ratio and the signal-to-interference-noise ratio are increased, and the error rate is reduced. In the present application, in a communication system, it is considered that the channel quality is at a normal level in this case.

On the contrary, if the beam is mismatched due to movement or rotation of the terminal device, that is, the transmission beam is not aligned with the receiving terminal device, and/or the reception beam is not aligned with the transmitting terminal device, the channel corresponding to the mismatched beam pair cannot obtain a good beam forming gain, and may even be in an energy blank area of the beam, and at this time, the signal reception power, the signal-to-noise ratio or the signal-to-interference-and-noise ratio are reduced, so that the error rate is greatly improved. I.e. the channel quality is low compared to the normal level.

Optionally, in order to evaluate the change of the channel quality, the terminal device uses the error rate when the beams are accurately paired as a threshold value of the error rate of the corresponding channel, and when the error rate is higher than the threshold value, it may be determined that the beams are not accurately paired but have an offset, and when the beam pairing is inaccurate, the beam mismatching is referred to as beam mismatching.

Therefore, optionally, in the present application, whether a beam pairing between the terminal device and the network device is mismatched may be further monitored by monitoring the channel quality; the aforementioned plurality of channels in the present application may be understood as channels experienced by signals transmitted through a plurality of beams.

It should be understood that the description is only made briefly by taking the bit error rate as an example, and other parameters for indicating the channel quality are also within the scope of the present application and are not listed here.

The above-described communication system 100 is subject to experience the Robust of the communication system 100 based on beam access in the case where the antenna gain is enhanced by a beam.

Optionally, Robust refers to a key of NR for introducing the beam-based communication system 100 to support high-frequency communication, in which the system survival is under abnormal and dangerous conditions, for example, in a case that a transceiving beam pair between the network device 102 and the terminal device 116 and/or the terminal device 122 is mismatched due to movement or rotation of the terminal device 116 and/or the terminal device 122, if the transceiving beam pair between the network device 102 and the terminal device 116 and/or the terminal device 122 is mismatched, quality of a channel corresponding to the beam pair is degraded, and if the pairing of the beam pair cannot be recovered quickly, quality of a channel corresponding to the beam pair cannot be recovered, and thus error rate of information transmitted through the channel corresponding to the beam pair is increased, that is, transmission of the communication system 100 with inaccurate information transceiving may be greatly affected or even disconnected, and then a request for a higher layer to resume the connection.

It should be understood that the terminal device 116 and/or the terminal device 122 are presented as an example and should not limit the scope of the present application.

In the process of recovering the transceiving Beam pairing, Beam mismatch detection (Beam failure detection), New candidate Beam finding (New candidate Beam identification), Beam mismatch recovery request (Beam failure recovery, BFRR), etc. are included, wherein a Beam mismatch detection reference signal may be used to monitor Beam (channel) quality, and the monitoring of channel quality is performed on the premise that one or more reference signals need to be determined, and whether the channel quality meets requirements is determined according to a condition preset by a system during monitoring, for example, a block error rate (B L ER) of a corresponding channel may be calculated according to the reference signal, and for a channel whose quality meets requirements, the communication system may have a corresponding threshold for a B L ER of the channel, that is, when information is transmitted through the channel, the B L ER of an information bit may not exceed the threshold.

Optionally, when the protocol specifies that the threshold value of the B L ER is 10^-4When all the B L ERs calculated by the reference signals for monitoring the channel quality exceed the threshold, the channel quality is considered to be unsatisfactory, that is, the transmit-receive beam pair between the terminal device and the network device corresponding to the channel is mismatched, the channel quality needs to be recovered, a new candidate beam search, a beam mismatch reply request and the like need to be performed for the beam.

It should be understood that the threshold value of the B L ER specified by the protocol is illustrative and should not limit the scope of the present application, and other methods capable of determining the threshold value of the B L ER are within the scope of the present application.

It should be understood that fig. 1 is only an application scenario diagram, and other communication systems to which the present application can be applied are also within the scope of the present application. In the application scenario of fig. 1, fig. 2 is a schematic flow chart of a conventional method for monitoring channel quality.

Fig. 2 is a schematic flow diagram of a method of monitoring channel quality. The method comprises three steps S110-S130, which are described in detail below.

S110, the network equipment configures signaling and sends reference signals.

Optionally, in an existing method for monitoring channel quality, a terminal device determines a reference signal according to a first signaling configured by a network device, for example, the network device first configures the first signaling, where the first signaling may be explicitly configured Beam mismatch detection reference signal resource configuration signaling (Beam failure detection reference signal resource configuration signaling), where the first signaling is used to indicate an index set of reference signals of the terminal device, where the reference signals associated with the index set at least include periodically transmitted channel state information reference signals (CSI-RS), and the reference signals associated with the index set are used to monitor channel quality, and in general, it may be understood that the first signaling includes an index of at least one periodically transmitted CSI-RS resource, and the CSI-RS resource is used to monitor link communication quality. The network device needs to explicitly inform the terminal device of the at least one periodically transmitted CSI-RS through the first signaling, and determine the at least one CSI-RS as a reference signal for monitoring the channel quality.

Optionally, in the existing method for monitoring channel quality, when the terminal device does not receive the first signaling, the terminal device determines a reference Signal according to a second signaling configured by the network device, for example, the network device first configures the second signaling, where the second signaling includes an index set of one or more Transmission Configuration Indicators (TCI) states, and the TCI states of the index set are used to indicate a Quasi-co-location (QC L) relationship between a control channel demodulation reference Signal (DMRS) and other reference signals, and the second signaling may further include a selection or activation instruction for selecting, in a set of TCI state indexes, one of CSI-RS, SS/PBCH B L and other reference signals as an indication of a QC L relationship between an antenna port of the current control channel demodulation reference Signal and antenna ports of other reference signals.

Optionally, the network device sends the reference signal including at least one reference signal for monitoring channel quality, and when the network device configures the first signaling and/or the second signaling, the terminal device may determine, from the reference signal, the reference signal that can be used for monitoring channel quality according to the first signaling and/or the second signaling.

And S120, the terminal equipment determines a reference signal from the reference signal set according to the signaling and monitors the channel quality.

Optionally, the terminal device determines a reference signal from the reference signal set according to the signaling, and monitors the quality of a channel corresponding to the reference signal according to the determined reference signal.

Optionally, when the network device configures the first signaling, the terminal device receives the first signaling, in which case the terminal device may determine the reference signal according to an index set of one reference signal indicated by the first signaling, because the reference signal associated with the index set indicated by the first signaling includes at least one periodically transmitted CSI-RS, and in NR, only the periodically transmitted CSI-RS and SS/PBCH B L OCK may be used for monitoring channel quality, when the network device configures the first signaling, the terminal device may determine to use the CSI-RS as the reference signal and perform quality monitoring on a channel corresponding to the CSI-RS, for example, calculate a bit error rate corresponding to the CSI-RS, compare the calculated bit error rate with a preset bit error rate of the system, and determine whether a transceiving beam pair between the terminal device and the network device corresponding to the channel is mismatched by monitoring the channel quality.

Optionally, when the network device is not configured with the first signaling but configured with the second signaling, the terminal device may default to assume that the reference signal includes at least one periodically transmitted CSI-RS or SS/PBCH B L OCK, and the at least one periodically transmitted CSI-RS or SS/PBCH block has a QC L relationship with a DMRS for a Physical Downlink Control Channel (PDCCH), and it is understood that when the second signaling is configured, the terminal device default reference signal needs to satisfy the QC L relationship with the DMRS of the PDCCH, that is, in this case, the terminal device needs to know which reference signals have a QC L relationship with the DMRS of the PDCCH, and the second signaling includes at least one quasi-co-located QC L information index associated with a demodulation reference signal of the control Channel for indicating a QC L relationship between an antenna port of the demodulation reference signal of the control Channel and an antenna port of another reference signal, and then the terminal device may determine the QC L relationship for monitoring the quality of the reference signal of the Channel according to this indication.

Generally, the QC L relationship is understood to include at least a spatial quasi co-location (spatial QC L) relationship, where the spatial QC L relationship is also understood to be one of the QC L relationships.

The QC L relationship related in the embodiment of the present application means that the signals corresponding to the antenna ports of the signals have the same parameters, or the QC L relationship means that the terminal can determine the parameters of another antenna port having the QC L relationship with the antenna port according to the parameters of one antenna port, or the QC L relationship means that the parameters of the two antenna ports have the same parameters, or the QC L relationship means that the parameter difference between the two antenna ports is smaller than a certain threshold value.

The resource identifiers comprise Channel state information Reference Signal (CSI-RS) resource identifiers, or SRS resource identifiers, or resource identifiers of synchronization Signal/synchronization Signal blocks, or resource identifiers of preamble sequences transmitted on a PRACH, or resource identifiers of DMRS, for indicating a beam on a resource, for example, a spatial L relationship between a port for a downlink Signal and a port for a downlink Signal, or a spatial L relationship between a port for an uplink Signal and a port for a downlink Signal, or a spatial AOD relationship between a port for an uplink Signal and a port for an uplink Signal, or a spatial L relationship between a beam for a downlink Signal, or a beam for a link a Signal, or a beam for a link a Signal and a beam for a downlink Signal, or a beam for a link a Signal, or a beam for a downlink Signal, or a beam for a Signal, or a beam for a corresponding to a downlink Signal, or a beam for a downlink Signal, or a beam for a Signal, or a beam for.

Signals transmitted on ports having a spatial QC L relationship may also be understood to have corresponding beams including at least one of the same receive beam, the same transmit beam, a transmit beam corresponding to the receive beam (corresponding to a reciprocal scene), and a receive beam corresponding to the transmit beam (corresponding to a reciprocal scene).

The signals transmitted on the ports having the spatial QC L relationship may also be understood as receiving or transmitting signals using the same spatial filter.

Signals transmitted on ports having a spatial QC L relationship may also be understood as having a corresponding beam pair connection (BP L), the corresponding BP L including at least one of the same downstream BP L, the same upstream BP L, the upstream BP L corresponding to downstream BP L, and the downstream BP L corresponding to upstream BP L.

Therefore, when the network device is configured with the second signaling, the terminal device can determine the periodically transmitted CSI-RS or SS/PBCH B L OCK having the relation of QC L with the DMRS for the PDCCH as the reference signal.

Optionally, after determining the reference signal according to the first signaling and/or the second signaling, the terminal device may monitor the channel quality according to the reference signal, for example, obtain a channel information error rate according to the CSI-RS or the SS/PBCH B L OCK, determine the calculated error rate and a preset error rate threshold, and determine that the channel quality is not satisfactory when the calculated error rate is greater than a preset threshold, that is, the beam pair corresponding to the channel has beam mismatch.

S130, the terminal device sends a channel quality recovery request.

Optionally, when the terminal device monitors that the quality of the channel does not meet the requirement, that is, the error rates calculated according to the at least one reference signal are all greater than a threshold value of a preset error rate, the terminal device needs to send a channel quality recovery request to the network device, and for a beam corresponding to the channel, that is, the terminal device needs to send a beam mismatch recovery request (beam mismatch recovery request).

Based on the method for determining a reference signal shown in fig. 2, a terminal device needs to determine the reference signal based on a signaling configured by a network device, and then when the network device is not configured with a related first signaling and a related second signaling, the terminal device cannot determine the reference signal and further cannot monitor channel quality, at this time, if a transmit-receive beam pairing between the network device and the terminal device is mismatched due to movement or rotation of the terminal device, the channel quality is lower than a preset value, but there is no corresponding reference signal at that time, and the channel quality cannot be quickly recovered for channel monitoring, then transmission of a communication system may be greatly affected and even disconnected, and then a higher layer needs to be requested to recover connection.

Therefore, the present application provides a method for monitoring channel quality, where a terminal device can directly determine a reference signal according to a protocol agreed mode when the two signaling configurations are not obtained, and then quickly recover the channel quality to ensure transmission of a communication system when the channel quality is lower than a preset value due to mismatch of a transmit-receive beam between a network device and the terminal device, and fig. 3 is a schematic flowchart of the method for monitoring channel quality provided in an embodiment of the present application.

Fig. 3 is a schematic flow chart of a method for monitoring channel quality according to an embodiment of the present application. The method comprises three steps S210-S230, which are described in detail below.

S210, the network equipment sends a reference signal.

Optionally, in this embodiment, the network device sends a reference signal to the terminal device through a channel, where the reference signal includes the CSI-RS and/or the SS/PBCH B L OCK, but the network device does not configure the first signaling and the second signaling for the terminal device, that is, the terminal device cannot receive corresponding indication information of the network device about the reference signal, and in order that the terminal device can still monitor channel quality in this case, in this embodiment, a method for the terminal device to determine one SS/PBCH B L OCK from the reference signal as the reference signal is proposed.

S220, the terminal equipment determines an SS/PBCH B L OCK received in the initial access as a reference signal to monitor the channel quality.

Optionally, in this embodiment, the terminal device may monitor whether the first signaling is received, and when the first signaling is not received, the terminal device monitors whether the second signaling is received, and when neither the first signaling nor the second signaling is received, the terminal device may directly determine a default reference signal according to a protocol, where the default reference signal may be a previously received SS/PBCH block;

optionally, the terminal device determines whether it is still within a specified time window, and the duration and starting time of the specified time window may be specified by the communication protocol, determined according to the capability of the terminal device, or indicated by the network device.

In this embodiment, for example, the duration and the starting time of a specified time window are protocol specifications, where the starting time of the specified time window is a current physical layer timeslot of a 1 st Acknowledgement character (Ack) reported by a terminal device; the duration of the time window is 5 microseconds, then, when the terminal device determines that the time when the first signaling and the second signaling are not received is within the time window, the terminal device will continue to monitor whether the first signaling and/or the second signaling are received, and if the time is outside the time window, the terminal device will directly determine the reference signal according to the protocol on the basis that the first signaling and the second signaling are not received.

It should be appreciated that the above-described time window determination is by way of example, and that the detailed time window concept will be further described in conjunction with fig. 6.

In this embodiment, the directly determining, by the terminal device according to the protocol, the reference signal on the basis that the first signaling and the second signaling are not received includes:

firstly, when initially accessing a network device, a terminal device selects a synchronization signal block for association and transmission of a Random Access Channel (RACH), where the synchronization signal block may be unique;

optionally, after the initial access, the terminal device does not receive the first signaling and the second signaling, and the terminal device uses the unique SS/PBCH B L OCK determined at the time of the initial access as a reference signal, wherein the unique SS/PBCH B L OCK is the synchronization signal block selected from the initial access procedure and associated with and transmitted by the random access channel.

Optionally, in the present application, the Synchronization Signal block includes a Synchronization Signal and a broadcast Signal, where the Synchronization Signal includes a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), the broadcast Signal is a Signal transmitted by a Physical Broadcast Channel (PBCH), and the PBCH is demodulated by using a DMRS, in the present application, the Synchronization signals PSS and SSS in the Synchronization Signal block are used for Synchronization, which is not limited in the present application, and system information bits carried on the PBCH may be finally decoded by decoding bits of system information carried by the PBCH after channel estimation by decoding the DMRS of the PBCH, so as to obtain bits, and the ratio of successfully decoded bits or bit blocks may be evaluated.

S230, the terminal device sends a channel quality recovery request.

Optionally, when the terminal device monitors that the quality of the channel does not meet the requirement, that is, the error rate calculated by the terminal device according to the unique SS/PBCH B L OCK is greater than or equal to a threshold of a preset error rate, the terminal device needs to send a channel quality recovery request to the network device, and for a beam corresponding to the channel, that is, the terminal device needs to send a beam mismatch recovery request.

Fig. 4 is another schematic flow chart of a method for monitoring channel quality according to an embodiment of the present disclosure. The method comprises three steps S310-S330, which are described in detail below.

S310, the network equipment sends a reference signal.

In this embodiment, a network device sends a reference signal to a terminal device through a channel, where the reference signal includes the CSI-RS and/or the SS/PBCH B L OCK, but the network device does not configure the first signaling and the second signaling for the terminal device, that is, the terminal device cannot receive corresponding indication information of the network device for monitoring the reference signal by the channel, and in order that the terminal device can still monitor channel quality under this condition, the embodiment proposes a method for the terminal device to determine multiple SS/PBCH B L OCKs from the reference signal as the reference signal.

S320, the terminal device determines a plurality of SS/PBCH B L OCKs received in the initial access as reference signals to monitor the channel quality.

In this embodiment, it is also necessary to determine whether to receive the first signaling and the second signaling, and the determining method is similar to the method for determining whether to receive the first signaling and the second signaling in fig. 3 and is not repeated here.

Optionally, in this embodiment, the directly determining, by the terminal device according to the protocol, the reference signal on the basis that the first signaling and the second signaling are not received includes:

firstly, when terminal equipment is initially accessed, a plurality of synchronous signal blocks sent by network equipment are received through a plurality of channels; when the terminal equipment does not receive a first signaling and a second signaling which are sent by the network equipment and used for monitoring the channel quality, determining M synchronous signal blocks from a plurality of synchronous signal blocks received in the initial access process so as to monitor the quality of M channels corresponding to the M synchronous signal blocks one by one; m is an integer greater than or equal to 1;

the plurality of synchronization signal blocks may be obtained by scanning for a plurality of times when initially accessing, because the initial access process is not necessarily completed when the terminal device initially accesses the network device and scans the synchronization signal block for the first time. For example, when the communication protocol specifies that the terminal device monitors the channel quality of M channels, the terminal device selects M sync signal blocks from the plurality of sync signal blocks according to a certain specification to monitor the channel quality of M channels.

Optionally, the received multiple synchronization signal blocks may be sorted according to Reference Signal Receiving Power (RSRP) of N synchronization signal blocks in the multiple synchronization signal blocks, where the RSRP may be layer 1 Reference signal receiving power L1-RSRP, and M synchronization signal blocks with the largest RSRP in the N synchronization signal blocks are taken;

or sorting the N synchronization signal blocks according to their Reference Signal Reception Quality (RSRQ) to obtain M synchronization signal blocks with the highest RSRQ among the N synchronization signal blocks;

alternatively, the N synchronization Signal blocks are sorted according to the Signal-to-Noise Ratio (SNR) or the Signal-to-Interference plus Noise Ratio (SINR) of the synchronization Signal blocks, and the M synchronization Signal blocks with the highest SNR or SINR among the N synchronization Signal blocks are obtained.

Optionally, how to use the selected M synchronization signal blocks as the reference signals for monitoring the channel quality corresponding to the M synchronization signal blocks according to the above specification includes:

for example, in this embodiment, when the terminal device performs the initial access, the terminal device completes the initial access process only when scanning the synchronization signal blocks twice, and the plurality of synchronization signal blocks sent by the network device received through the N channels includes N groups of synchronization signal blocks, and one group of synchronization signal blocks is received through each channel, and each group of synchronization signal blocks includes two synchronization signal blocks, and the indexes corresponding to the synchronization signal blocks in each group of synchronization signal blocks are the same.

Then, 1 synchronization signal block with the highest RSRP, RSRQ, SNR or SINR can be selected in each group of synchronization signal blocks as the candidate synchronization signal blocks of the group, then N groups of synchronization signal blocks can determine N candidate synchronization signal blocks, and M of the N candidate synchronization signal blocks with the highest RSRP, RSRQ, SNR or SINR can be used as the reference signals of the channels corresponding to the M synchronization signal blocks.

It should be understood that the above two scanning passes are only an example and are not intended to limit the scope of the present application.

Optionally, in this embodiment, a method for monitoring channel quality according to the determined M synchronization signal blocks as reference signals is similar to the monitoring method described in fig. 3, and is not described here again.

S330, the terminal equipment sends a channel quality recovery request.

Optionally, when the terminal device monitors that the quality of the channel does not meet the requirement, that is, the error rates calculated by the terminal device according to the plurality of SS/PBCH B L OCKs are all greater than or equal to a threshold of a preset error rate, or at least one of the error rates calculated according to the plurality of SS/PBCH B L OCKs is greater than or equal to a threshold of a preset error rate, the terminal device needs to send a channel quality recovery request to the network device, and for a beam corresponding to the channel, that is, the terminal device needs to send a beam mismatch recovery request.

Fig. 5 is another schematic flow chart of a method for monitoring channel quality according to an embodiment of the present disclosure. The method comprises three steps S410-S430, which are described in detail below.

And S410, the network equipment sends a reference signal.

In this embodiment, a network device sends a reference signal to a terminal device through a channel, where the reference signal includes the CSI-RS and/or the SS/PBCH B L OCK, but the network device does not configure the first signaling and the second signaling for the terminal device, that is, the terminal device cannot receive corresponding indication information of the network device for monitoring the reference signal through the channel.

The terminal device determines at least one reference signal as a reference signal to monitor the channel quality S420.

the terminal equipment receives a plurality of reference signals sent by the network equipment through a plurality of channels in P reference signal sending periods;

when the terminal equipment does not receive a first signaling and a second signaling which are sent by the network equipment and used for monitoring the channel quality, determining Q reference signals from a plurality of reference signals received in the P reference signal sending periods so as to monitor the quality of Q channels corresponding to the Q reference signals one by one; p and Q are integers greater than or equal to 1.

The reference signal may be CSI-RS or SS/PBCH B L OCK, and the values of P and Q may be defined by a protocol, or determined according to the capability of the terminal device or indicated by the network device.

Optionally, the terminal device receives, in P periods, reference signals sent by the network device through each channel, where the reference signals include P reference signals, and selects one of the P reference signals with the highest RSRP, RSRQ, or SNR, or SINR as a candidate reference signal corresponding to the monitored channel quality;

or, selecting the RSRP, RSRQ, SNR, or SINR average of P reference signals as the RSRP, RSRQ, SNR, or SINR of the candidate reference signals corresponding to the monitored channel quality;

or selecting the RSRP, the RSRQ, the SNR or the SINR as the RSRP, the RSRQ, the SNR or the SINR of the candidate reference signal corresponding to the monitored channel quality in other filtering modes.

Optionally, one RSRP, RSRQ, SNR, or SINR is calculated as RSRP, RSRQ, SNR, or SINR of candidate reference signals whose channel quality should be monitored according to the above RSRP, RSRQ, or SNR of P reference signals received from each channel for P periods, and then RSRP, RSRQ, SNR, or SINR of K candidate reference signals can be finally calculated for K channels.

And selecting the Q reference signals with the maximum RSRP, RSRQ or SNR or SINR of the reference signals as the reference signals according to the RSRP, RSRQ or SNR or SINR of the K candidate reference signals, and monitoring the quality of a channel corresponding to each of the Q reference signals.

For a brief explanation of a specific implementation of the method for determining the reference signal, a specific procedure for determining the reference signal is explained by taking the protocol specification of P ═ K ═ Q ═ 2 as an example.

The terminal device receives two reference signals T1 and T2 transmitted by the network device through two channels K1 and K2 in a first period P1, wherein T1 corresponds to K1, and T2 corresponds to K2;

the terminal device receives two reference signals T3 and T4 transmitted by the network device through two channels K1 and K2 in a second period P2, wherein T3 corresponds to K1, and T4 corresponds to K2;

the terminal device selects a reference signal with the maximum reference signal received power, reference signal received quality or signal-to-noise ratio from two reference signals T1 and T3 corresponding to the first channel K1, for example, the reference signal is determined to be T1;

the terminal device selects a reference signal with the maximum reference signal received power, reference signal received quality, or signal-to-noise ratio from two reference signals T2 and T4 corresponding to the second channel K2, for example, it is determined to be T2;

the terminal device may select T1 and T2 as reference signals for the corresponding channels K1 and K2.

It should be understood that the above-mentioned P ═ K ═ Q ═ 2 is an illustration, and does not limit the scope of protection of the present application.

Optionally, at least one reference signal transmission period closest to the current communication time may be selected from the P periods.

Optionally, after the terminal device determines the reference signal, the bit error rate may be calculated according to the reference signal corresponding to each channel, and comparing the relationship between the calculated bit error rate and a predetermined threshold may determine whether the quality of the channel corresponding to the reference signal meets a requirement, and determine whether the transmit-receive beam pairing between the corresponding network device and the terminal device is mismatched according to the condition of the channel quality.

S430, the terminal device sends a channel quality recovery request.

Optionally, when the terminal device monitors that the quality of the channel does not meet the requirement, that is, the error rates calculated by the terminal device according to the multiple reference signals are all greater than or equal to a threshold of a preset error rate, or at least one of the error rates calculated according to the multiple reference signals is greater than or equal to a threshold of a preset error rate, the terminal device needs to send a channel quality recovery request to the network device, and for a beam corresponding to the channel, that is, the terminal device needs to send a beam mismatch recovery request.

According to the method for monitoring channel quality of the present application shown in fig. 3 to 5, the terminal device can determine the reference signal and monitor the channel quality when not receiving the first signaling and the second signaling.

Optionally, in order to avoid that the terminal device does not receive the first signaling and the second signaling due to the signaling delay, the present application may provide that the terminal device determines whether the terminal device is still within a specified time window when the terminal device does not receive the first signaling and the second signaling, and if the terminal device does not receive the first signaling and the second signaling outside the time window, the terminal device may determine the reference signal according to the methods shown in fig. 3 to fig. 5, and monitor the quality of the channel; otherwise, if the time window is still within, the first signaling and the second signaling are continuously detected. The method of monitoring channel quality according to the present invention shown in fig. 3 to 5 can enhance the transmission performance of a communication system.

Fig. 6 is a schematic diagram of a time window in an embodiment of the present application, where M1 denotes the start time of the time window and L en denotes the duration of the time window.

Optionally, M1 in this application may be that the terminal device receives first indication information sent by the network device, where the first indication information may be used to indicate M1, for example, the current physical layer timeslot where the terminal device receives a certain specific signaling may be a certain time after the certain specific signaling is received, which is agreed by the protocol. The time may be a certain Orthogonal Frequency Division Multiplexing (OFDM) symbol or a certain slot (slot), and the first indication information may be indication information of Radio Resource Control (RRC) or Medium Access Control (MAC) Control Element (CE)/Downlink Control Information (DCI).

It should be understood that the first indication information is not necessarily used for indicating the starting time, and may be used for other purposes, but the protocol may agree that the time slot received by this signaling is the starting time, which is equivalent to implicitly indicating the starting time.

Optionally, M1 in this application may also be that the terminal device determines M1 according to a transmission period of the uplink information, for example, the current physical layer timeslot of a K-th Acknowledgement character (Ack) or a negative Acknowledgement (Nack) reported by the terminal device, where K is an integer greater than or equal to 1, and may be a certain time after the Ack or the Nack is reported according to a protocol convention. It should be understood that, the present application is not limited to how to determine the starting time of the time window, and may be any time acquired by the terminal device, but the determination method of the time may be agreed in the protocol.

Optionally, the L en in this application may be an absolute time, for example, an absolute time such as microseconds and milliseconds is used as a measurement unit, or may be a relative time, and a duration of a frame structure length such as a symbol, a slot, and a subframe is used as a measurement unit, for example, the duration of the time window may be set to 5 microseconds or 5 slots, which is not limited in this application.

Alternatively, in the present application, the predetermined time window may be one time window shown in fig. 6, or may be composed of several time windows shown in fig. 6, which is not limited in this application.

Optionally, in this application, the time window shown in fig. 6 represents a specified time window, in this application, the terminal device may periodically monitor whether the first signaling and/or the second signaling is received within the specified time window, and when the first signaling and the second signaling are not received within the specified time window, the terminal device may determine the reference signal and start monitoring the channel quality according to any of the methods for determining the reference signal shown in fig. 3 to fig. 5.

Optionally, in this application, the specifying the activation condition for monitoring the channel quality includes:

the first condition is that: the terminal device receives a first signaling sent by a network device, wherein the first signaling is used for indicating an index set of a reference signal sent periodically,

the second condition is that: the terminal device does not receive the first signaling, and the terminal device receives a second signaling sent by a network device, wherein the second signaling is used for indicating the quasi co-location relation between the reference signal sent periodically and the demodulation reference signal of the downlink control channel,

a third condition: the first signaling and the second signaling are not received within a specified time window and a reference signal is determined according to the method of determining a reference signal described in fig. 3-5.

A detailed flow chart is given in fig. 7 based on the above-described activation condition for monitoring channel quality.

Fig. 7 is a schematic diagram of an embodiment of starting monitoring channel quality according to an embodiment of the present application. The method comprises five steps S510-S550, which are described in detail below.

S510, the terminal device monitors whether the first signaling is received.

Optionally, in this application, when monitoring the channel quality, the terminal device first monitors whether a first signaling configured by the network device is received, where the first signaling is used to indicate which reference signal the terminal device uses as a reference signal for monitoring the channel quality, for example, in this application, the first signaling may be an explicitly configured beam mismatch detection reference signal resource configuration signaling.

Optionally, when the terminal device monitors the first signaling configured by the network device, the terminal device uses the reference signal indicated by the first signaling as a reference signal for monitoring the channel quality, and executes S550 to perform channel monitoring on a channel corresponding to the reference signal.

Optionally, when the terminal device does not monitor the first signaling configured by the network device, S520 is executed.

S520, the terminal equipment monitors whether the second signaling is received.

Optionally, in this application, after the terminal device does not monitor the first signaling configured by the network device, it monitors whether a second signaling configured by the network device is received, where the second signaling indicates a QC L relationship between the DMRS of the PDCCH and other reference signals.

Optionally, when the terminal device monitors the second signaling, the terminal device may determine the reference signal according to the QC L relationship indicated by the second signaling, and perform S550 channel monitoring on the channel corresponding to the reference signal according to the reference signal.

Optionally, when the terminal device does not monitor the second signaling, S530 or S540 is executed. S530, the terminal equipment determines whether the time is within a preset time window. Optionally, in this application, when the terminal device does not monitor the first signaling or the second signaling, the terminal device determines whether the time slot is within a preset time window, for example, a communication protocol specifies that a starting time of the time window is a time when the RRC connection state is established, that is, a time when the terminal device receives a message 4 in the random access step, and a time duration of the time window is 5 microseconds, and then, when the terminal device does not monitor the first signaling or the second signaling, the terminal device determines that the time is within the time window.

Optionally, when the terminal device does not monitor the first signaling nor the second signaling, the terminal device continues to perform S510 and S520, and the terminal device continues to monitor whether the first signaling and/or the second signaling is received.

Optionally, when the terminal device does not monitor the first signaling nor the second signaling, the time is outside the time window, S540 is executed. It should be understood that the above determination of the preset time window is by way of example, and does not limit the scope of the present application, and may be any one of those shown in fig. 6.

It should be understood that S530 is an optional step in this application.

S540, the terminal device determines a reference signal.

Optionally, when the time at which the terminal device does not monitor the first signaling or the second signaling is greater than or equal to the duration of 5 microseconds, the terminal device determines a reference signal according to any of the methods for determining a reference signal shown in fig. 3 to 5, and executes S550, where the reference signal monitors channel quality.

S550, the terminal device starts monitoring the channel quality.

Fig. 8 is a schematic block diagram of a terminal device provided in an embodiment of the present application. As shown in fig. 8, the terminal device may include: a transceiver module 31 and a monitoring module 32.

The transceiver module 31 is configured to receive, by the terminal device, multiple synchronization signal blocks sent by a network device through N channels when the terminal device initially accesses, where each synchronization signal block corresponds to one channel and each synchronization signal block is carried in the corresponding channel, where N is an integer greater than or equal to 1;

optionally, if the transceiver module 31 receives the first signaling and the second signaling, the monitoring module 32 is configured to monitor the channel quality, and optionally, the monitoring module 32 determines a reference signal based on the first signaling and/or the second signaling and monitors the channel based on the reference signal.

Alternatively, if the transceiver module 31 does not receive the first signaling and the second signaling, the monitoring module 32 determines the reference signal and monitors the channel quality according to the reference signal based on any one of the methods for determining the reference signal by the terminal device shown in fig. 3.

Or, optionally, if the transceiver module 31 does not receive the first signaling and the second signaling in the preset time window, optionally, the monitoring module 32 determines the reference signal based on any one of the methods for determining the reference signal by the terminal device shown in fig. 3 to fig. 5, and monitors the channel quality according to the reference signal.

Optionally, the transceiver module 31 is further configured to signal a channel quality recovery request to the network device if the monitoring module 32 detects that the channel quality does not meet the requirement.

It should be understood that the terminal device may correspond to a terminal device in the method for monitoring channel quality according to an embodiment of the present invention, and the terminal device may include modules for performing the methods performed by the terminal device in the method for monitoring channel quality in fig. 3 to 5. Moreover, each module and the other operations and/or functions in the terminal device are respectively for implementing the corresponding flow of the method for monitoring channel quality in fig. 3 to fig. 5, and are not described herein again for brevity.

Fig. 9 is another schematic block diagram of a terminal device provided in an embodiment of the present application. As shown in fig. 9, the terminal device comprises a processor 501 and a transceiver 502, and optionally a memory 503. Wherein, the processor 502, the transceiver 502 and the memory 503 are communicated with each other via the internal connection path to transmit control and/or data signals, the memory 503 is used for storing a computer program, and the processor 501 is used for calling and running the computer program from the memory 503 to control the transceiver 502 to transmit and receive signals.

When the program instructions stored in the memory 503 are executed by the processor 501, the processor 501 is configured to control the transceiver 502 to receive the reference signal, the processor 501 is further configured to monitor, based on the reference signal indicated by the first signaling and/or the second signaling, the quality of the channel corresponding to the reference signal in a case where the transceiver 502 receives the first signaling and/or the second signaling, and the processor 501 is configured to determine the reference signal and monitor the channel quality of the channel corresponding to the reference signal according to the monitored SS/PBCH B L OCK at the time of initial access of the terminal device or according to the monitored SS/PBCH B L OCK or CSI-RS in at least one period during communication between the terminal device and the network device in a case where the transceiver 502 does not receive the first signaling and/or the second signaling.

The processor 501 and the memory 503 may be combined into a processing device, and the processor 501 is configured to execute the program codes stored in the memory 503 to implement the functions. In particular, the memory 503 may be integrated into the processor 501 or may be independent of the processor 501. The terminal device may further include an antenna 504 for transmitting the channel quality recovery request output from the transceiver 502 via a wireless signal.

In particular, the terminal device may correspond to a terminal device in the method for monitoring channel quality according to the embodiment of the present invention, and the terminal device may include modules for performing the methods performed by the terminal device in the method for monitoring channel quality in fig. 3 to 5. Moreover, each module and the other operations and/or functions in the terminal device are respectively for implementing the corresponding flow in the method for monitoring channel quality in fig. 3 to fig. 5, specifically, the memory 503 is configured to store a program code, so that when the processor 501 executes the program code, the transceiver 502 is controlled to execute the step of receiving the reference signal of the terminal device in the method for monitoring channel quality through the antenna 504, and the specific process of each module executing the corresponding step is already described in detail in the method for monitoring channel quality, and is not described herein again for brevity.

The processor 501 may be configured to perform the actions implemented in the terminal described in the foregoing method embodiments, and the transceiver 502 may be configured to perform the actions of the terminal transmitting or sending to the network device described in the foregoing method embodiments. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

The processor 501 and the memory 503 may be integrated into a processing device, and the processor 501 is configured to execute the program codes stored in the memory 503 to implement the functions. In particular, the memory 503 may be integrated into the processor 501.

The terminal device may also include a power supply 505 for providing power to various components or circuits in the terminal.

In addition, in order to further improve the functions of the terminal device, the terminal device may further include one or more of an input unit 506, a display unit 507, an audio circuit 508, a camera 509, a sensor 510, and the like, and the audio circuit may further include a speaker 5082, a microphone 5084, and the like.

Fig. 10 is a schematic block diagram of a network device provided in an embodiment of the present application. As shown in fig. 10, the network device includes a processor 610 and a transceiver 620, and optionally, the network device further includes a memory 630. Wherein, the processor 610, the transceiver 620 and the memory 630 communicate with each other via the internal connection path to transmit control and/or data signals, the memory 630 is used for storing a computer program, and the processor 610 is used for calling and running the computer program from the memory 630 to control the transceiver 620 to transmit and receive signals. When the program instructions stored in the memory 630 are executed by the processor 610, the processor 610 is configured to control the transceiver 620 to receive a channel quality recovery request transmitted by a terminal device, and in the present application, the transceiver 620 may receive the transmitted channel quality recovery request even if the network device is not configured with the first signaling and the second signaling.

The processor 610 and the memory 630 may be combined into a single processing device, and the processor 610 is configured to execute the program codes stored in the memory 630 to implement the functions described above. In particular implementations, the memory 630 may be integrated with the processor 610 or may be separate from the processor 610.

The network device may further include an antenna 640 for transmitting the reference signal output by the transceiver 620.

In particular, the network device may correspond to a network device in the method of monitoring channel quality according to an embodiment of the present invention, and the network device may include units for performing the methods performed by the network device in the methods of monitoring channel quality in fig. 2 to 5. Also, in order to implement the corresponding flow of the method for monitoring channel quality in fig. 2 to 5, respectively, the units in the network device 30 and the other operations and/or functions described above, in particular, the memory 630 is used for storing program codes, so that when the program codes are executed by the processor 610, the transceiver 620 is controlled to perform the transmission of the reference signal and the configuration of the first signaling and/or the second signaling in the method for monitoring channel quality in fig. 2 to 5 through the antenna 640.

The present application also provides a communication system comprising one or more of the aforementioned network devices, and one or more terminal devices.

It should be understood that, in the embodiment of the present application, each module may have a different function of one module, or a plurality of modules may be used in combination, and the present application does not limit this.

It should be understood that, in the embodiment 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 embodiment of the present application.

It should be understood that the processor in the embodiments of the present application may be a Central Processing Unit (CPU), and the processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory the volatile memory may be Random Access Memory (RAM), which serves as an external cache memory, by way of example but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), dynamic RAM (SDRAM), Synchronous DRAM (SDRAM), double data rate Synchronous DRAM (SDRAM), or DDR DRAM (DDR L).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). 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, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes 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. Additionally, the character "/" herein, is often abbreviated form of "and/or".

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of monitoring channel quality, comprising:

when the terminal equipment is initially accessed, a plurality of synchronous signal blocks sent by the network equipment are received through a plurality of channels;

when the terminal equipment does not receive a first signaling and a second signaling which are sent by the network equipment and used for monitoring the channel quality, determining M synchronous signal blocks from a plurality of synchronous signal blocks received in the initial access process so as to monitor the quality of M channels corresponding to the M synchronous signal blocks one by one; m is an integer greater than or equal to 1;

2. The method according to claim 1, wherein M synchronization signal blocks are determined from said plurality of synchronization signal blocks, wherein the value of M is determined according to the capabilities of said terminal device, or

The value of M is specified by the communication protocol, or

The value of M is indicated by the network device.

3. The method according to claim 1 or 2, wherein when the value of M is 1, the method further comprises:

and the terminal equipment takes the synchronous signal block selected in the initial access as the reference signal for monitoring the channel quality, and the synchronous signal block is used for the association and transmission of a random access channel.

4. The method of claim 1 or 2, wherein the M synchronization signal blocks satisfy at least one of the following conditions:

the M synchronous signal blocks are M synchronous signal blocks with the maximum reference signal receiving power in the synchronous signal blocks corresponding to the N channels,

the M synchronous signal blocks are M synchronous signal blocks with highest reference signal receiving quality in the synchronous signal blocks corresponding to the N channels,

the M synchronous signal blocks are M synchronous signal blocks with highest signal-to-noise ratio or signal-to-interference-and-noise ratio in the synchronous signal blocks corresponding to the N channels.

5. A method of monitoring channel quality, comprising:

6. The method of claim 5, wherein the value of P is determined according to the capability of the terminal device, or

The value of P is specified by the communication protocol, or

The value of P is indicated by the network device.

7. The method according to claim 5 or 6, wherein Q reference signals are determined from a plurality of reference signals received in said P reference signal transmission periods, the value of Q being determined according to the capabilities of the terminal device, or

The value of Q is specified by the communication protocol, or

The value of Q is indicated by the network device.

8. The method according to claim 5 or 6, wherein the Q reference signals satisfy at least one of the following conditions:

the Q reference signals are Q reference signals with the maximum reference signal receiving power in the reference signals corresponding to the N channels,

the Q reference signals are the Q reference signals with the highest reference signal receiving quality in the reference signals corresponding to the N channels,

the Q reference signals are Q reference signals with the highest signal-to-noise ratio or signal-to-interference-and-noise ratio in the reference signals corresponding to the N channels.

9. A method of monitoring channel quality, comprising:

the terminal equipment detects whether a preset condition is met;

when the preset condition is met, the terminal equipment monitors the channel quality;

wherein the preset conditions include

The method comprises the steps that first signaling and second signaling are not received within a specified time window, and the terminal device supports channel quality monitoring based on a synchronization signal block received during initial access or reference signals transmitted in P periods before the specified time window, wherein the first signaling comprises indexes of channel state information reference signals (CSI-RS) resources transmitted in at least one period, the CSI-RS resources are used for monitoring channel quality, the second signaling comprises at least one quasi-co-location QC L information index associated with control channel demodulation reference signals, the QC L information index is used for determining reference signals, and the reference signals are used for monitoring the channel quality.

10. The method of claim 9, further comprising:

the terminal device receives first indication information sent by a network device, where the first indication information is used to indicate a starting time of the time window, or,

and the time when the first indication information is received is the starting time of the time window.

11. The method according to claim 9 or 10, characterized in that the method further comprises:

and the terminal equipment determines the starting moment of the time window according to the sending time interval of the uplink information.

12. A terminal device, comprising a transceiver and a processor, wherein,

the transceiver is used for receiving a plurality of synchronous signal blocks sent by network equipment through a plurality of channels when the terminal equipment is initially accessed;

the processor is configured to determine M synchronization signal blocks from the multiple synchronization signal blocks received in the initial access process when the transceiver does not receive the first signaling and the second signaling which are sent by the network device and used for monitoring the channel quality, so as to perform quality monitoring on M channels corresponding to the M synchronization signal blocks one to one; m is an integer greater than or equal to 1;

the first signaling carries indexes of CSI-RS resources sent in at least one period, the CSI-RS resources are used for monitoring channel quality, the second signaling comprises at least one quasi-co-location QC L information index related to a control channel demodulation reference signal, the QC L information index is used for determining a reference signal, and the reference signal is used for monitoring the channel quality.

13. The terminal device of claim 12, wherein M synchronization signal blocks are determined from the plurality of synchronization signal blocks, wherein the value of M is determined according to the capabilities of the terminal device, or

The value of M is specified by the communication protocol, or

The value of M is indicated by the network device.

14. The terminal device according to claim 12 or 13, wherein when the value of M is 1, the processor is specifically configured to use a synchronization signal block selected by the terminal device in initial access as a reference signal for monitoring channel quality, where the synchronization signal block is used for association and transmission of a random access channel.

15. The terminal device according to claim 12 or 13, wherein the M synchronization signal blocks satisfy at least one of the following conditions:

16. A terminal device, comprising a transceiver and a processor, wherein,

the transceiver is used for receiving a plurality of reference signals transmitted by the network equipment through a plurality of channels in P reference signal transmission periods;

the processor is configured to determine Q reference signals from the multiple reference signals received in the P reference signal transmission periods when the transceiver does not receive the first signaling and the second signaling that are sent by the network device and used for monitoring the channel quality, so as to perform quality monitoring on Q channels that are in one-to-one correspondence with the Q reference signals; p and Q are integers greater than or equal to 1;

17. The terminal device of claim 16, wherein the value of P is determined according to the capabilities of the terminal device, or

The value of P is specified by the communication protocol, or

The value of P is indicated by the network device.

18. A terminal device according to claim 16 or 17, wherein Q reference signals are determined from a plurality of reference signals received during said P reference signal transmission periods, the value of Q being determined according to the capabilities of the terminal device, or

The value of P is specified by the communication protocol, or

The value of P is indicated by the network device.

19. The terminal device according to claim 16 or 17, wherein the Q reference signals satisfy at least one of the following conditions:

20. A terminal device, comprising a transceiver and a processor, wherein,

the processor is used for detecting whether a preset condition is met;

the processor is specifically configured to perform channel quality monitoring when the preset condition is met;

the preset conditions comprise that a first signaling and a second signaling are not received in a specified time window, and the terminal device supports channel quality monitoring based on a synchronization signal block received during initial access or reference signals transmitted in P periods before the specified time window, wherein the first signaling comprises an index of a channel state information reference signal (CSI-RS) resource transmitted in at least one period, the CSI-RS resource is used for monitoring channel quality, the second signaling comprises at least one quasi-co-location QC L information index associated with a control channel demodulation reference signal, the QC L information index is used for determining a reference signal, and the reference signal is used for monitoring channel quality.

21. The terminal device according to claim 20, wherein the transceiver is configured to receive first indication information sent by a network device, the first indication information indicating a starting time of the time window, or,

22. The terminal device according to claim 20 or 21, wherein the processor is specifically configured to determine the starting time of the time window according to a transmission period of uplink information.

23. A chip system, comprising:

a processor for calling and running a computer program from a memory so that a device on which the system-on-chip is installed performs the method of any one of claims 1 to 11.