WO2020192508A1 - 直通链路监测方法和终端 - Google Patents

直通链路监测方法和终端 Download PDF

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Publication number
WO2020192508A1
WO2020192508A1 PCT/CN2020/079832 CN2020079832W WO2020192508A1 WO 2020192508 A1 WO2020192508 A1 WO 2020192508A1 CN 2020079832 W CN2020079832 W CN 2020079832W WO 2020192508 A1 WO2020192508 A1 WO 2020192508A1
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Prior art keywords
terminal
link
state
timer
access layer
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PCT/CN2020/079832
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English (en)
French (fr)
Inventor
王达
谌丽
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority claimed from CN201910365326.7A external-priority patent/CN111757377B/zh
Application filed by China Academy of Telecommunications Technology CATT filed Critical China Academy of Telecommunications Technology CATT
Publication of WO2020192508A1 publication Critical patent/WO2020192508A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a direct link monitoring method and terminal.
  • the direct link In the Long Term Evolution (LTE) system, the direct link (sidelink) only supports the broadcast service, and the direct link of the subsequent communication system may support other services in addition to the broadcast service, such as new In addition to supporting broadcast services, the direct link of the air interface (New Radio, NR) system can also support unicast and multicast services. Since radio link monitoring (RLM) cannot be applied to direct links that support unicast or multicast services, it is impossible to realize link monitoring of direct links that support unicast or multicast services.
  • RLM radio link monitoring
  • Some embodiments of the present disclosure provide a direct link monitoring method and terminal to solve the problem of the inability to implement link monitoring of a direct link supporting unicast or multicast services.
  • Some embodiments of the present disclosure provide a direct link monitoring method, including:
  • the first terminal monitors the quality of the through link to obtain the through link status, where the through link is the through link between the first terminal and the second terminal;
  • the first terminal reports the state of the through link to the access layer of the first terminal;
  • the first terminal reports the through link status to the access layer of the first terminal, or by not reporting the through link status to the access layer
  • the direct link state indicates the state of the direct link.
  • the first state includes a synchronized state or an out-of-synchronization state
  • the second state includes an invalid (None) state, and in a case where the first terminal does not receive the signal sent by the second terminal, the through link state is the None state.
  • the method further includes:
  • the first terminal reports a radio link failure (Radio Link Failure, RLF) to a higher layer of the first terminal according to the through link status received by the access layer.
  • RLF Radio Link Failure
  • RLF report includes at least one of the following:
  • the access layer continuously receives N1 out-of-synchronization states, it starts a first timer, and if the first timer times out, it reports RLF to the upper layer of the first terminal, where the The condition for stopping the first timer includes that the access layer continuously receives N11 synchronization states;
  • the condition for the timer to stop includes that the access layer continuously receives N22 synchronization states;
  • a third timer is started, and if the third timer expires, RLF is reported to the upper layer of the first terminal, where the third The condition for the timer to stop includes that the access layer continuously receives N33 synchronization states, and the N3 is the sum of the number of out-of-synchronization states and None states;
  • N1, N2, N3, N11, N22, and N33 are positive integers, and N33 is greater than or equal to N22, and N22 is greater than or equal to N11.
  • At least one of the duration of the first timer, the duration of the second timer, the duration of the third timer, N1, N2, N3, N11, N22, and N33 is: pre-configured, protocol Predefined or configured on the network side or configured by other terminals, where the other terminals include:
  • the first terminal performs a report to the higher layer of the first terminal according to the through link status received by the access layer.
  • RLF reports including:
  • a fourth timer is started, and if the fourth timer expires, the RLF report is performed to the upper layer of the first terminal, where the The condition for the fourth timer to stop includes that the access layer continuously receives N44 synchronization states, where the foregoing N4 and N44 are positive integers.
  • At least one of the duration of the fourth timer, N4 and N44 is: pre-configured, pre-defined by the protocol, or configured by the network side or configured by other terminals, where the other terminals include :
  • Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal.
  • PSCCH physical sidelink control channel
  • the ACK or NACK carried on the PSFCH sent by at least one second terminal is received, it is in the synchronization state; if the signal carried on the PSFCH sent by any second terminal is not received, it is in the out-of-synchronization state; or,
  • the ACK carried on the PSFCH sent by at least one second terminal is received, or the NACK carried on the PSFCH sent by less than M second terminals is received, it is in the synchronization state; if more than or equal to M second terminal transmissions are received
  • the NACK carried on the PSFCH is out of synchronization, and the M is a positive integer greater than or equal to 1.
  • the reporting of the through link status by the first terminal to the access layer of the first terminal includes:
  • the first terminal periodically reports the through link status to the access layer of the first terminal.
  • the monitoring of the quality of the through link by the first terminal includes:
  • the first terminal responds to the PSCCH signal or radio link monitoring reference signal (Radio Link Monitoring Reference Signal) sent by the second terminal on the direct link.
  • Radio Link Monitoring Reference Signal Radio Link Monitoring Reference Signal
  • Monitoring Reference Signal, RLM-RS Monitoring Reference Signal
  • the first terminal In the case where the first terminal is the sending end on the through link, the first terminal sends a physical sidelink feedback channel (PSFCH) to the through link sent by the second terminal on the through link. ) Signal or RLM-RS for monitoring.
  • PSFCH physical sidelink feedback channel
  • the RLM-RS includes at least one of the following:
  • HARQ-ACK Sequence-based Hybrid Automatic Repeat Request Acknowledgement
  • DMRS Demodulation Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • Synchronization signal block Synchronization Signal Block
  • Some embodiments of the present disclosure also provide a terminal, where the terminal is a first terminal and includes:
  • a monitoring module configured to monitor the quality of the through link and obtain the through link status, where the through link is the through link between the first terminal and the second terminal;
  • the first terminal reports the state of the through link to the access layer of the first terminal;
  • the first terminal reports the through link status to the access layer of the first terminal, or by not reporting the through link status to the access layer
  • the direct link state indicates the state of the direct link.
  • the first state includes a synchronized state or an out-of-synchronization state
  • the second state includes the None state, and in a case where the first terminal does not receive the signal sent by the second terminal, the through link state is the None state.
  • the first terminal further includes:
  • the reporting module is configured to report the radio link failure RLF to the upper layer of the terminal according to the through link status received by the access layer.
  • the reporting module includes at least one of the following:
  • the first reporting unit is configured to, if the access layer continuously receives N1 out-of-synchronization states, start a first timer, and if the first timer expires, proceed to the higher layer of the first terminal RLF report, where the condition that the first timer stops includes that the access layer continuously receives N11 synchronization states;
  • the second reporting unit is configured to start a second timer if the access layer continuously receives N2 None states, and if the second timer expires, perform RLF to the upper layer of the first terminal Reporting, where the condition for stopping the second timer includes that the access layer continuously receives N22 synchronization states;
  • the third reporting unit is configured to start a third timer if the access layer continuously receives N3 states, and if the third timer expires, report RLF to the upper layer of the first terminal ,
  • the condition for stopping the third timer includes that the access layer continuously receives N33 synchronization states, and the N3 is the sum of the numbers of the out-of-synchronization state and the None state;
  • N1, N2, N3, N11, N22, and N33 are positive integers, and N33 is greater than or equal to N22, and N22 is greater than or equal to N11.
  • the reporting module is configured to start a fourth timer if the access layer continuously receives N4 out-of-synchronization states, and if the fourth timer expires, send a notification to the first terminal
  • the upper layer of the NAS performs RLF reporting, where the condition for stopping the fourth timer includes that the access layer continuously receives N44 synchronization states, where the above N4 and N44 are positive integers.
  • the terminal is a first terminal and includes: a transceiver, a memory, a processor, and a program stored on the memory and running on the processor,
  • the transceiver is configured to monitor the quality of the through link to obtain the through link status, and the through link is the through link between the first terminal and the second terminal;
  • the transceiver or the processor when the state of the through link is the first state, the transceiver or the processor is configured to report the state of the through link to the access layer of the first terminal; or,
  • the transceiver or the processor is configured to report the through link status to the access layer of the first terminal, or by not reporting the through link status to the access layer.
  • the incoming layer reports the state of the through link, indicating the state of the through link.
  • the first state includes a synchronized state or an out-of-synchronization state
  • the second state includes an invalid None state, wherein, when the first terminal does not receive a signal sent by the second terminal, the through link state is the None state.
  • the transceiver or the processor is further configured to:
  • a radio link failure RLF report is performed to the upper layer of the first terminal.
  • the wireless link is performed to the upper layer of the first terminal according to the through link status received by the access layer
  • the failed RLF report includes at least one of the following:
  • the access layer continuously receives N1 out-of-synchronization states, it starts a first timer, and if the first timer times out, it reports RLF to the upper layer of the first terminal, where the The condition for stopping the first timer includes that the access layer continuously receives N11 synchronization states;
  • the condition for the timer to stop includes that the access layer continuously receives N22 synchronization states;
  • a third timer is started, and if the third timer expires, RLF is reported to the upper layer of the first terminal, where the third The condition for the timer to stop includes that the access layer continuously receives N33 synchronization states, and the N3 is the sum of the number of out-of-synchronization states and None states;
  • N1, N2, N3, N11, N22, and N33 are positive integers, and N33 is greater than or equal to N22, and N22 is greater than or equal to N11.
  • the wireless link is performed to the upper layer of the first terminal according to the through link status received by the access layer Failed RLF report, including:
  • a fourth timer is started, and if the fourth timer expires, the RLF report is performed to the upper layer of the first terminal, where the The condition for the fourth timer to stop includes that the access layer continuously receives N44 synchronization states, where the foregoing N4 and N44 are positive integers.
  • the implementation of the present disclosure also provides a computer-readable storage medium on which a computer program is stored.
  • the program is executed by a processor, the steps in the through link monitoring method provided by some embodiments of the present disclosure are implemented.
  • the first terminal monitors the quality of the through link to obtain the through link status, and the through link is the through link between the first terminal and the second terminal; wherein, in the In the case where the through link state is the first state, the first terminal reports the through link state to the access layer of the first terminal; in the case where the through link state is in the second state, The first terminal reports the direct link state to the access layer of the first terminal, or indicates the direct link state by not reporting the direct link state to the access layer.
  • link monitoring can be implemented on the direct link supporting unicast or multicast services, so as to improve the monitoring effect of the direct link, and furthermore, the transmission performance of the unicast or multicast service can be improved.
  • FIG. 1 is a schematic diagram of a network structure applicable to some embodiments of the present disclosure
  • FIG. 2 is a flowchart of a direct link monitoring method provided by some embodiments of the present disclosure
  • FIG. 3 is a schematic diagram of RLF reporting provided by some embodiments of the present disclosure.
  • FIG. 4 is another schematic diagram of RLF reporting provided by some embodiments of the present disclosure.
  • FIG. 5 is another schematic diagram of RLF reporting provided by some embodiments of the present disclosure.
  • FIG. 6 is another schematic diagram of RLF reporting provided by some embodiments of the present disclosure.
  • Figure 7 is a structural diagram of a terminal provided by some embodiments of the present disclosure.
  • FIG. 8 is another structural diagram of a terminal provided by some embodiments of the present disclosure.
  • FIG. 9 is another structural diagram of a terminal provided by some embodiments of the present disclosure.
  • FIG. 10 is another structural diagram of a terminal provided by some embodiments of the present disclosure.
  • FIG. 1 is a schematic diagram of a network structure applicable to some embodiments of the present disclosure. As shown in FIG. 1, it includes a plurality of terminals 11 and a network side device 12.
  • the terminal 11 may be a user terminal (User Equipment, UE). ) Or other terminal devices, such as: mobile phones, tablet computers (Tablet Personal Computer), laptop computers (Laptop Computer), personal digital assistants (Personal Digital Assistant, PDA), mobile Internet devices (Mobile Internet Device, MID),
  • PDA Personal Digital Assistant
  • mobile Internet devices Mobile Internet Device, MID
  • For terminal-side devices such as wearable devices (Wearable Devices), robots, vehicles, etc., it should be noted that the specific types of terminals are not limited in some embodiments of the present disclosure.
  • the direct link that can directly communicate between the terminals 11 is called Sidelink (translated as a direct communication link or bypass, also called a direct communication interface or a direct link interface), that is, the terminals can communicate directly through Sidelink.
  • Sidelink transcriptionally a direct communication link or bypass, also called a direct communication interface or a direct link interface
  • the terminals for direct communication may all be on the network or all off the network, or some devices may be on the network and some devices may be off the network.
  • the network side device 12 may be a base station, such as a macro station, LTE eNB, 5G NR NB, etc.; the network side device may also be a small station, such as a low power node (LPN), pico, femto, etc., or
  • the network side device can be an access point (Access Point, AP); the network side device can also be a network node composed of a central unit (Central Unit, CU) and multiple transmission reception points (Transmission Reception Points, TRP) managed and controlled by it
  • the cellular communication link between the network-side device and the terminal-side device that directly communicates is called a device-to-network (D2N) link, or Uu interface.
  • D2N device-to-network
  • FIG. 2 is a flowchart of a direct link monitoring method provided by some embodiments of the present disclosure. As shown in FIG. 2, it includes the following steps:
  • a first terminal monitors the quality of a through link to obtain a through link status, where the through link is a through link between the first terminal and the second terminal;
  • the first terminal reports the state of the through link to the access layer of the first terminal;
  • the first terminal reports the through link status to the access layer of the first terminal, or by not reporting the through link status to the access layer
  • the direct link state indicates the state of the direct link.
  • the above-mentioned direct link between the first terminal and the second terminal may also be understood as a link between the first terminal and the second terminal that supports unicast or multicast services.
  • the above-mentioned first terminal may monitor the RLM-RS sent by the second terminal, or the first terminal may monitor the PSFCH signal sent by the second terminal, or the first terminal may monitor the PSCCH signal sent by the second terminal
  • the PSFCH signal can be the HARQ-ACK feedback signal carried on the PSFCH
  • the PSCCH signal can be the scheduling assignment (SA) or the direct link control information (Sidelink control information, SCI) carried on the PSCCH.
  • SA scheduling assignment
  • SCI direct link control information
  • the HARQ-ACK feedback signal includes three types.
  • the aforementioned direct link state may be the direct link state obtained according to the monitoring result of the first terminal monitoring the quality of the aforementioned direct link. Further, the above-mentioned direct link status may be a result of monitoring quality of the direct link.
  • the above-mentioned first state and the second state may be predefined direct link states, and are two different direct link states.
  • the state of the direct link is reported to the access layer (Access Stratum, AS) when the state of the direct link is the first state; and when the state of the direct link is the second state,
  • the direct link status can be reported to the access layer, or the direct link status can be indicated by not reporting the direct link status to the access layer, that is, the direct link status is not received at the access layer.
  • the access layer confirms that the state of the direct link monitored by the first terminal is the above-mentioned second state, thereby reducing reporting and saving power consumption.
  • the link monitoring of the direct link supporting unicast or multicast service can be realized, so as to improve the monitoring effect of the direct link, and further improve the performance of the unicast or multicast service. Transmission performance.
  • the first state includes a synchronization state (In-sync) or an out-of-sync state (Out-of-sync);
  • the second state includes an invalid (None) state, and in a case where the first terminal does not receive the signal sent by the second terminal, the through link state is the None state.
  • the aforementioned synchronization state and out-of-synchronization state may be based on a preset threshold. For example, if the link quality of any RLM-RS is detected to be higher than the preset first threshold (for example, the threshold Qin), it is In the synchronization state, if it is monitored that the link quality of all RLM-RSs is lower than the preset second threshold (for example, the threshold Qout), it is an out-of-synchronization state, where the preset first threshold and the preset second threshold The value of can be different or the same, which is not limited.
  • a PSCCH signal sent by at least one second terminal is received, it is in a synchronized state, and if a PSCCH signal sent by any second terminal is not successfully received, it is in an out-of-synchronization state or in an invalid (None) state.
  • the ACK or NACK carried on the PSFCH sent by at least one second terminal is received, it is in the synchronization state, and if the signal carried on the PSFCH sent by any second terminal is not received, it is in the out-of-synchronization state. In addition, if the second terminal does not send any PSFCH signal, it is in an invalid (None) state.
  • ACKs carried on the PSFCH sent by at least one second terminal are received, or NACKs carried on the PSFCH sent by less than M second terminals are received, it is in the synchronization state; if the received is greater than or equal to M The NACK carried on the PSFCH sent by the two terminals is out of synchronization, and the M is a positive integer greater than or equal to 1.
  • the above M is network configuration or pre-configuration or protocol stipulation.
  • the above-mentioned failure to receive any signal carried on the PSFCH sent by the second terminal may be that the second terminal does not receive the information sent by the first terminal, and does not feed back the PSFCH signal, that is, DTX, so that the first terminal does not receive it.
  • the second terminal receives the information sent by the first terminal and sends the PSFCH feedback signal (if the information is received correctly, ACK is fed back, and if the information is received incorrectly, NACK is fed back ), but the first terminal did not receive the PSFCH signal sent by the second terminal.
  • the reception of the PSCCH signal or PSFCH signal can be considered as the successful reception of the PSCCH signal or PSFCH signal, or it can be considered that the PSCCH signal or the PSFCH signal is received to identify that the PSCCH signal or the PSFCH signal is sent by the second terminal.
  • the above explanation of the synchronization state and the out-of-synchronization state can be the direct link state obtained by monitoring or detecting or receiving or measuring one or more signals in a period, or it can be aperiodic monitoring or detecting or receiving or measuring
  • the through link state obtained by one or more signals is not limited in the present disclosure.
  • the signal sent by the second terminal may be a PSCCH signal or a reference signal or a PSFCH signal sent by the second terminal.
  • the first terminal is the receiving end of the through link
  • the second terminal is the signal of the through link.
  • the signal is a PSCCH signal or a reference signal, such as RLM-RS.
  • the signal It is a reference signal or PSFCH signal.
  • the above-mentioned first terminal did not receive the PSCCH signal or reference signal sent by the second terminal may be that the second terminal did not send the PSCCH signal or reference signal, or it may be that the second terminal sent the PSCCH signal or reference signal, but the A terminal does not receive the PSCCH signal or reference signal sent by the second terminal.
  • the above non-reception includes two meanings.
  • the first is that the second terminal does not send PSCCH Signal or reference signal
  • the second is that the transmitting end sends a PSCCH signal or reference signal, but the first end does not receive it
  • the first terminal is the transmitting end of the through link
  • the second terminal is the through link
  • the non-reception may indicate that the second terminal has not sent a signal.
  • the above method further includes:
  • the first terminal reports the RLF to the upper layer of the first terminal according to the through link status received by the access layer.
  • the above-mentioned high layer may be a high layer of the access layer (or may be an upper layer of the access layer), such as a non-access layer (Non-Access Stratum, NAS) or an application layer (application layer).
  • the above-mentioned RLF report may be an RLF declaration (RLF declaration).
  • RLF reporting can be implemented to a higher layer, so that the through link can be re-established or information transmission can be stopped in time, so as to improve the transmission performance of the through link or save the channel resources of the through link.
  • this implementation manner may include the following implementation manners when the first state includes the synchronization state or the out-of-synchronization state, and the second state includes the None state:
  • the first terminal in the case where the first terminal is the receiving end on the through link, the first terminal sends a message to the first terminal according to the through link status received by the access layer.
  • the high-level RLF report includes at least one of the following:
  • the access layer continuously receives N1 out-of-synchronization states, it starts a first timer, and if the first timer times out, it reports RLF to the upper layer of the first terminal, where the The condition for stopping the first timer includes that the access layer continuously receives N11 synchronization states;
  • the condition for the timer to stop includes that the access layer continuously receives N22 synchronization states;
  • a third timer is started, and if the third timer expires, RLF is reported to the upper layer of the first terminal, where the third The condition for the timer to stop includes that the access layer continuously receives N33 synchronization states, and the N3 is the sum of the number of out-of-synchronization states and None states;
  • N1, N2, N3, N11, N22, and N33 are positive integers, and N33 is greater than or equal to N22, and N22 is greater than or equal to N11.
  • the receiving end may be a terminal that receives data in the direct link.
  • the duration of the first timer, the second timer, and the third timer may be pre-configured, pre-defined by the protocol, or configured on the network side, or configured by other terminals to the receiving terminal, where the other terminals may be sending Terminal, control terminal, group head or cluster head terminal, management terminal in the terminal group, etc.
  • the duration of the first timer, the second timer, and the third timer may be the same or different.
  • the timer may also be referred to as a timer, and the timer may be an RLF timer (RLF timer).
  • At least one of the duration of the first timer, the duration of the second timer, the duration of the third timer, N1, N2, N3, N11, N22, and N33 are: pre-configured and predefined by the protocol Or configured on the network side or configured by other terminals, where the other terminals include but are not limited to the following terminals:
  • the first terminal is the receiving terminal of the through link and the second terminal is the transmitting terminal of the through link
  • the second terminal the control terminal, the group head terminal, the cluster head terminal, or the terminal
  • the management terminal in the group configures the above parameters.
  • the above-mentioned continuous reception of N3 states by the access layer may be a state in which the continuous N3 states are all in the out-of-synchronization state and the None state. For example: Taking the above N3 as 3 examples, if the out-of-synchronization state, out-of-synchronization state, and None state are continuously received, the third timer is started, or if the None state, out-of-synchronization state, and None state are continuously received, the third timer is started.
  • the third timer is started, or if the out-of-synchronization state, the out-of-synchronization state, and the out-of-synchronization state are continuously received, the third timer is started. In other words, if the out-of-synchronization state and/or the None state are continuously received to N3, the third timer is started.
  • the receiving end can accurately and timely report RLF for various situations, and since N33 is greater than or equal to N22, and N22 is greater than or equal to N11, it is possible that the transmitting end does not send a signal due to the None state. Therefore, when None The timer can be stopped as soon as possible when the status is changed to the received synchronization status to avoid error reporting.
  • High-level RLF reporting including:
  • a fourth timer is started, and if the fourth timer expires, the RLF report is performed to the upper layer of the first terminal, where the The condition for the fourth timer to stop includes that the access layer continuously receives N44 synchronization states, where the foregoing N4 and N44 are positive integers.
  • At least one of the duration of the fourth timer, N4 and N44 is: pre-configured, pre-defined by the protocol, or configured on the network side, or configured by other terminals, where the other terminals include but not Limited to the following terminals:
  • Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal.
  • the fourth timer, N4 and N44 are pre-configured and predefined by the protocol Or configured on the network side or configured by other terminals to the sending terminal, where other terminals may be receiving terminals, control terminals, group head or cluster head terminals, management terminals in a terminal group, etc.
  • the sender can report the RLF accurately and in time.
  • the above-mentioned first terminal reporting the through link status to the access layer of the first terminal includes:
  • the first terminal periodically reports the through link status to the access layer of the first terminal.
  • the reporting period can be network configuration, pre-configured, or protocol default, or configured by other terminals to the receiving terminal or sending terminal, such as 10ms or 5ms, etc.
  • the other terminals can be sending terminals, receiving terminals, and controlling terminals. , Group head or cluster head terminal, management terminal in the terminal group, etc.
  • the through link status in one cycle can be based on a monitored one in the cycle. Or the through link status obtained from multiple signals.
  • the monitoring of the quality of the through link by the first terminal includes:
  • the first terminal monitors the PSCCH signal or RLM-RS sent by the second terminal on the direct link; or
  • the first terminal monitors the PSFCH signal or the RLM-RS sent by the second terminal on the direct link.
  • RLM-RS may include at least one of the following:
  • HARQ-ACK DMRS, CSI-RS, SSB.
  • the above-mentioned SSB may be sent periodically or non-periodically.
  • the RLM-RS sent by the sending end may be sent along with the data of the through link, for example, the DMRS, CSI-RS or SSB sent by the sending end is sent along with the data of the through link.
  • the RLM-RS sent by the receiving end may be sent along with the PSFCH of the through link, for example: the DMRS, CSI-RS or SSB sent by the receiving end is sent along with the PSFCH of the through link, and HARQ-ACK may be Sent on PSFCH.
  • the aforementioned PSFCH signal may include:
  • the implementation manner provided above can be implemented: the first terminal reports the through link status according to the monitoring result of the through link between the first terminal and the second terminal, and the through link status includes synchronization (In-sync), out-of-sync, and None state (or report nothing).
  • the method for receiving UE to monitor the through link :
  • the period for the UE to report the link quality can be set.
  • the physical layer of the UE needs to report the access layer and the link quality result (that is, the above-mentioned direct link state).
  • the reporting period can be network configuration, pre-configured, or protocol default, or configured by other UEs to the receiving UE or the sending UE, such as 10ms or 5ms, etc.
  • the other UEs can be the sending UE, the receiving UE, and the control UE.
  • the link quality results reported above include In-sync, Out-of-sync, and None status. That is to say, when reporting link quality, in addition to reporting In-sync and Out-of-sync, it will also report None, or Report nothing;
  • reporting In-sync and Out-of-sync can be similar to reporting In-sync and Out-of-sync on the NR Uu port, for example: according to Qin and Qout If the link quality of any RLM-RS in the period is higher than Qin, then report In-sync; if the link quality of all RLM-RS in the period is lower than Qout, report Out-of-sync ;
  • a PSCCH signal sent by at least one second terminal is received, it is in a synchronized state, and if no PSCCH signal sent by any second terminal is received, it is in an out-of-synchronization state or in an invalid (None) state.
  • the reception of the PSCCH signal or PSFCH signal can be considered as the successful reception of the PSCCH signal or PSFCH signal, or it can be considered that the PSCCH signal or the PSFCH signal is received to identify that the PSCCH signal or the PSFCH signal is sent by the second terminal.
  • the above explanation of the synchronization state and the out-of-synchronization state can be the direct link state obtained by monitoring or receiving one or more signals in a period, or the direct link state obtained by aperiodic monitoring or receiving one or more signals.
  • the link state is not limited in this disclosure.
  • the sender When reporting the None state (or reporting nothing), there are two situations: the first, the sender does not send PSCCH signals or RLM-RS in the period, that is, the sender does not send signals in the period; the second, The sender sends a PSCCH signal or RLM-RS in the period, that is, the sender sends a signal in the period, but due to the poor link, the receiver does not receive any PSCCH signal or RLM-RS in the period;
  • the above-mentioned RLM-RS may refer to the DMRS, CSI-RS or SSB on the SL port.
  • the DMRS, CSI-RS or SSB are all sent with the data of the SL port. Therefore, if the sending UE does not Sending data will not send RLM-RS.
  • the above-mentioned SSB may be sent periodically or non-periodically.
  • the PSCCH signal or RLM-RS of the direct link can be It is aperiodic. Therefore, there is a case where there is no PSCCH signal or RLM-RS of the through link in this period.
  • N33 is greater than or equal to N22, and N22 is greater than or equal to N11, because None may send the UE without sending a signal. Therefore, after receiving multiple None states consecutively to start RLF timer, Receiving In-sync can stop RLF timer as soon as possible to avoid false alarms.
  • N1, N2, N3, T1, T2, T3 can be equal or different.
  • the parameters in the above process including N1, N2, N3, T1, T2, T3, N11, N22, N33, can be configured through the network, or through pre-configuration, or through other UE configuration to the receiving UE, among which other terminals It can be a sending UE, a control UE, a group head or cluster head UE, a management UE in a UE group, etc.
  • the method for sending UE to monitor the through link :
  • the sending UE can receive the PSFCH direct link feedback channel or RLM-RS sent by the receiving UE for link monitoring;
  • PSFCH can be designed as follows:
  • HARQ-ACK or CSI report based on DMRS namely HARQ-ACK/CSI report+DMRS, or it is possible to send CSI-RS together, namely HARQ-ACK/CSI report+DMRS+CSI-RS;
  • RLM-RS can be sequence-based HARQ-ACK, DMRS or CSI-RS.
  • the period for the UE to report the link quality is set.
  • the physical layer of the UE needs to report the AS layer and the link quality indicator (that is, the above-mentioned direct link status).
  • the reported link quality has three states, In-sync, Out-of-sync and None (or nothing is reported);
  • In-sync and Out-of-sync it is similar to the receiving UE; or, if ACK or NACK carried on the PSFCH sent by at least one second terminal is received, it is in a synchronized state. If no second terminal is received The signal carried on the PSFCH sent by the terminal is out of synchronization. Or, if the ACK carried on the PSFCH sent by at least one second terminal is received, or the NACK carried on the PSFCH sent by less than M second terminals is received, it is in the synchronous state; if the received is greater than or equal to M The NACK carried on the PSFCH sent by the two terminals is out of synchronization, and the M is a positive integer greater than or equal to 1.
  • the above-mentioned failure to receive any signal carried on the PSFCH sent by the second terminal may be that the second terminal does not receive the information sent by the first terminal, and does not feed back the PSFCH signal, that is, DTX, so that the first terminal does not receive it.
  • the second terminal receives the information sent by the first terminal and sends the PSFCH feedback signal (if the information is received correctly, ACK is fed back, and if the information is received incorrectly, NACK is fed back ), but the first terminal did not receive the PSFCH signal sent by the second terminal.
  • the reception of the PSCCH signal or PSFCH signal can be considered as the successful reception of the PSCCH signal or PSFCH signal, or it can be considered that the PSCCH signal or the PSFCH signal is received to identify that the PSCCH signal or the PSFCH signal is sent by the second terminal.
  • the above explanation of the synchronization state and the out-of-synchronization state can be the direct link state obtained by monitoring or receiving one or more signals in a period, or the direct link state obtained by aperiodic monitoring or receiving one or more signals.
  • the link state is not limited in this disclosure.
  • the sending UE For reporting None (or reporting nothing), the sending UE clearly knows whether there is a PSFCH sent by the receiving UE in this period, because the time interval between the PSFCH and the Physical Sidelink Share Channel (PSSCH) It is known that the PSSCH may indicate the data sent by the sending UE. Therefore, reporting None (or reporting nothing) can only be because the PSFCH sent by the UE is not received in the period, that is, there is no PSFCH signal or RLM-RS .
  • PSSCH Physical Sidelink Share Channel
  • the above-mentioned RLM-RS refers to the DMRS, CSI-RS, or SSB on the SL port.
  • the DMRS, CSI-RS or SSB are all sent along with the PSFCH of the SL port. Therefore, if the receiving UE does not send the PSFCH, it will not Send RLM-RS.
  • the None (or report nothing) status is not counted in the In-sync and Out-of-sync counters.
  • the parameters, including N4, T4, N44 can be configured by the network, or pre-configured, or configured to the sending UE through other UEs.
  • the other terminals can be receiving UE, controlling UE, group head or cluster head UE, UE group Management UE, etc.
  • the first terminal monitors the quality of the through link to obtain the through link status, and the through link is the through link between the first terminal and the second terminal; wherein, in the In the case where the through link state is the first state, the first terminal reports the through link state to the access layer of the first terminal; in the case where the through link state is in the second state, The first terminal reports the direct link state to the access layer of the first terminal, or indicates the direct link state by not reporting the direct link state to the access layer.
  • link monitoring can be implemented on the direct link supporting unicast or multicast services, so as to improve the monitoring effect of the direct link, and furthermore, the transmission performance of the unicast or multicast service can be improved. Further, it can be applied to the direct link characteristics of unicast or multicast services in the NR system, thereby improving the monitoring effect of the direct link.
  • FIG. 7 is a structural diagram of a terminal provided by some embodiments of the present disclosure.
  • the terminal is the first terminal.
  • the terminal 700 includes:
  • the monitoring module 701 is configured to monitor the quality of the through link and obtain the through link status, where the through link is the through link between the first terminal and the second terminal;
  • the first terminal reports the state of the through link to the access layer of the first terminal;
  • the first terminal reports the through link status to the access layer of the first terminal, or by not reporting the through link status to the access layer
  • the direct link state indicates the state of the direct link.
  • the first state includes a synchronized state or an out-of-synchronization state
  • the second state includes the None state, and in a case where the first terminal does not receive the signal sent by the second terminal, the through link state is the None state.
  • the first terminal further includes:
  • the reporting module 702 is configured to report a radio link failure RLF to the upper layer of the terminal according to the through link status received by the access layer.
  • the reporting module includes at least one of the following:
  • the first reporting unit 7021 is configured to, if the access layer continuously receives N1 out-of-synchronization states, start a first timer, and if the first timer expires, send a message to the upper layer of the first terminal Perform RLF reporting, where the condition for stopping the first timer includes that the access layer continuously receives N11 synchronization states;
  • the second reporting unit 7022 is configured to start a second timer if the access layer continuously receives N2 None states, and when the second timer expires, perform a report to the upper layer of the first terminal RLF report, where the condition for stopping the second timer includes that the access layer continuously receives N22 synchronization states;
  • the third reporting unit 7023 is configured to start a third timer if the access layer continuously receives N3 states, and if the third timer expires, perform RLF to the upper layer of the first terminal Reporting, wherein the condition for stopping the third timer includes that the access layer continuously receives N33 synchronization states, and the N3 is the sum of the number of out-of-synchronization states and None states;
  • N1, N2, N3, N11, N22, and N33 are positive integers, and N33 is greater than or equal to N22, and N22 is greater than or equal to N11.
  • At least one of the duration of the first timer, the duration of the second timer, the duration of the third timer, N1, N2, N3, N11, N22, and N33 is: pre-configured, protocol Predefined or configured on the network side or configured by other terminals, where the other terminals include:
  • the PSCCH signal sent by at least one second terminal is received, it is in the synchronization state; if no PSCCH signal sent by any second terminal is received, it is in the out-of-synchronization state or in the None state; or,
  • the ACK or NACK carried on the PSFCH sent by at least one second terminal is received, it is in the synchronization state; if the signal carried on the PSFCH sent by any second terminal is not received, it is in the out-of-synchronization state; or,
  • the ACK carried on the PSFCH sent by at least one second terminal is received, or the NACK carried on the PSFCH sent by less than M second terminals is received, it is in the synchronization state; if more than or equal to M second terminal transmissions are received
  • the NACK carried on the PSFCH is out of synchronization, and the M is a positive integer greater than or equal to 1.
  • the reporting module 702 is configured to, if the access layer continuously receives N4 out-of-synchronization states, start a fourth timer, and if the fourth timer expires, send a notification to the first The upper layer of the terminal performs the RLF report, where the condition for stopping the fourth timer includes that the access layer continuously receives N44 synchronization states, where the foregoing N4 and N44 are positive integers.
  • At least one of the duration of the fourth timer, N4 and N44 is: pre-configured, pre-defined by the protocol, or configured by the network side or configured by other terminals, where the other terminals include :
  • Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal.
  • the reporting of the through link status by the first terminal to the access layer of the first terminal includes:
  • the first terminal periodically reports the through link status to the access layer of the first terminal.
  • the monitoring module 701 is configured to, when the first terminal is the receiving end on the through link, the first terminal responds to the PSCCH signal or the PSCCH signal sent by the second terminal on the through link.
  • RLM-RS for monitoring or
  • the monitoring module 701 monitors the PSFCH signal or RLM-RS sent by the second terminal on the direct link when the first terminal is the transmitting end on the direct link.
  • the RLM-RS includes at least one of the following:
  • HARQ-ACK DMRS, CSI-RS, SSB.
  • the first terminal provided by some embodiments of the present disclosure can implement each process in the method embodiment shown in FIG. 2 and can achieve the same beneficial effects. To avoid repetition, it will not be repeated here.
  • FIG. 10 is a structural diagram of another terminal provided by some embodiments of the present disclosure.
  • the terminal is a first terminal.
  • the first terminal includes: a transceiver 1010, a memory 1020, The processor 1000 and a program stored on the memory 1020 and capable of running on the processor 1000, wherein:
  • the transceiver 1010 is configured to monitor the quality of the through link and obtain the through link status, and the through link is the through link between the first terminal and the second terminal;
  • the transceiver 1010 or the processor 1000 is configured to report the through link status to the access layer of the first terminal;
  • the transceiver or the processor is configured to report the through link status to the access layer of the first terminal, or by not reporting the through link status to the access layer.
  • the incoming layer reports the state of the through link, indicating the state of the through link.
  • the transceiver 1010 can be used to receive and send data under the control of the processor 1000.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1000 and various circuits of the memory represented by the memory 1020 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 1010 may be a plurality of elements, that is, include a transmitter and a receiver, and provide a unit for communicating with various other devices on a transmission medium.
  • the processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 can store data used by the processor 1000 when performing operations.
  • the memory 1020 is not limited to being only on the first terminal, and the memory 1020 and the processor 1000 may be separated in different geographic locations.
  • the first state includes a synchronized state or an out-of-synchronization state
  • the second state includes an invalid None state, wherein, when the first terminal does not receive a signal sent by the second terminal, the through link state is the None state.
  • the transceiver 1010 or the processor 1000 is further configured to:
  • a radio link failure RLF report is performed to the upper layer of the first terminal.
  • the wireless link is performed to the upper layer of the first terminal according to the through link status received by the access layer
  • the failed RLF report includes at least one of the following:
  • the access layer continuously receives N1 out-of-synchronization states, it starts a first timer, and if the first timer times out, it reports RLF to the upper layer of the first terminal, where the The condition for stopping the first timer includes that the access layer continuously receives N11 synchronization states;
  • the condition for the timer to stop includes that the access layer continuously receives N22 synchronization states;
  • a third timer is started, and if the third timer expires, RLF is reported to the upper layer of the first terminal, where the third The condition for the timer to stop includes that the access layer continuously receives N33 synchronization states, and the N3 is the sum of the number of out-of-synchronization states and None states;
  • N1, N2, N3, N11, N22, and N33 are positive integers, and N33 is greater than or equal to N22, and N22 is greater than or equal to N11.
  • At least one of the duration of the first timer, the duration of the second timer, the duration of the third timer, N1, N2, N3, N11, N22, and N33 is: pre-configured, protocol Predefined or configured on the network side or configured by other terminals, where the other terminals include:
  • the PSCCH signal sent by at least one second terminal is received, it is in the synchronization state; if no PSCCH signal sent by any second terminal is received, it is in the out-of-synchronization state or in the None state; or,
  • the ACK or NACK carried on the PSFCH sent by at least one second terminal is received, it is in the synchronization state; if the signal carried on the PSFCH sent by any second terminal is not received, it is in the out-of-synchronization state; or,
  • the ACK carried on the PSFCH sent by at least one second terminal is received, or the NACK carried on the PSFCH sent by less than M second terminals is received, it is in the synchronization state; if more than or equal to M second terminal transmissions are received
  • the NACK carried on the PSFCH is out of synchronization, and the M is a positive integer greater than or equal to 1.
  • the wireless link is performed to the upper layer of the first terminal according to the through link status received by the access layer Failed RLF report, including:
  • a fourth timer is started, and if the fourth timer expires, the RLF report is performed to the upper layer of the first terminal, where the The condition for the fourth timer to stop includes that the access layer continuously receives N44 synchronization states, where the foregoing N4 and N44 are positive integers.
  • At least one of the duration of the fourth timer, N4 and N44 is: pre-configured, pre-defined by the protocol, or configured by the network side or configured by other terminals, where the other terminals include :
  • Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal Receiving terminal, control terminal, group head terminal, cluster head terminal or management terminal.
  • the reporting the through link status to the access layer of the first terminal includes:
  • the monitoring the quality of the through link includes:
  • the first terminal is the receiving end on the direct link, monitoring the PSCCH signal or RLM-RS sent by the second terminal on the direct link; or
  • the PSFCH signal or the RLM-RS sent by the second terminal on the direct link is monitored.
  • the RLM-RS includes at least one of the following:
  • HARQ-ACK DMRS, CSI-RS, SSB.
  • first terminal in this embodiment may be the first terminal in any implementation manner in the method embodiments in some embodiments of the present disclosure, and any of the first terminal in the method embodiments in some embodiments of the present disclosure
  • the implementation manners can be implemented by the above-mentioned first terminal in this embodiment, and achieve the same beneficial effects, and will not be repeated here.
  • the implementation of the present disclosure also provides a computer-readable storage medium on which a computer program is stored.
  • the program is executed by a processor, the steps in the through link monitoring method provided by some embodiments of the present disclosure are implemented.
  • the disclosed method and device can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be separately physically included, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.
  • the above-mentioned integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium.
  • the above-mentioned software functional unit is stored in a storage medium and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute part of the through-link transmission method described in each embodiment of the present disclosure step.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .
  • modules, units, sub-modules, sub-units, etc. can be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (Digital Signal Processing, DSP), digital signal processing equipment ( DSP Device, DSPD), Programmable Logic Device (PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, Other electronic units or combinations thereof that perform the functions described in the present disclosure.
  • ASICs application specific integrated circuits
  • DSP Digital Signal Processing
  • DSP Device digital signal processing equipment
  • PLD Programmable Logic Device
  • Field-Programmable Gate Array Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • the technology described in the embodiments of the present disclosure can be implemented through modules (for example, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure.
  • the software codes can be stored in the memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the purpose of the present disclosure can also be realized by running a program or a group of programs on any computing device.
  • the computing device may be a well-known general-purpose device. Therefore, the purpose of the present disclosure can also be achieved only by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that, in the device and method of the present disclosure, obviously, each component or each step can be decomposed and/or recombined.

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Abstract

本公开提供一种直通链路监测方法和终端，该方法包括：第一终端监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；或者，在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。

Description

直通链路监测方法和终端
相关申请的交叉引用
本申请主张在2019年3月28日在中国提交的中国专利申请号No.201910245844.5以及在2019年4月30日在中国提交的中国专利申请号No.201910365326.7的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种直通链路监测方法和终端。
背景技术
在长期演进(Long Term Evolution，LTE)系统中，直通链路(sidelink)只支持广播业务，而对于后续的通信系统的直通链路除了支持广播业务之外，还可能支持其他业务，例如：新空口(New Radio，NR)系统的直通链路除了支持广播业务之外，还可以支持单播和组播业务。由于无线链路监测(Radio Link Monitoring，RLM)无法适用支持单播或组播业务的直通链路，从而无法实现对支持单播或组播业务的直通链路的进行链路监测。
发明内容
本公开的一些实施例提供一种直通链路监测方法和终端，以解决无法实现对支持单播或组播业务的直通链路的进行链路监测的问题。
本公开的一些实施例提供一种直通链路监测方法，包括：
第一终端监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；或者，
在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
可选的，所述第一状态包括同步状态或者失步状态；
所述第二状态包括无效(None)状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
可选的，所述方法还包括：
所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败(Radio Link Failure，RLF)上报。
可选的，在所述第一终端为所述直通链路上的接收端的情况下，所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报，包括如下至少一项：
若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
其中，上述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
可选的，所述第一计时器的时长、第二计时器的时长、第三计时器的时长、N1、N2、N3、N11、N22和N33中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
发送终端、控制终端、组头终端、簇头终端或者管理终端。
可选的，在所述第一终端为所述直通链路上的发送端的情况下，所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报，包括：
若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，上述N4和N44为正整数。
可选的，所述第四计时器的时长、N4和N44中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
接收终端、控制终端、组头终端、簇头终端或者管理终端。
可选的，如果接收到至少一个第二终端发送的直通链路物理控制信道(Physical Sidelink Control Channel，PSCCH)信号，则为同步状态；如果没有接收到任何一个第二终端发送的PSCCH信号，则为失步状态或者为None状态；或者，
如果接收到至少一个第二终端发送的PSFCH上承载的ACK或NACK，则为同步状态；如果没有接收到任何一个第二终端发送的PSFCH上承载的信号，则为失步状态；或者，
如果接收到至少一个第二终端发送的PSFCH上承载的ACK，或者接收到小于M个第二终端发送的PSFCH上承载的NACK，则为同步状态；如果接收到大于或者等于M个第二终端发送的PSFCH上承载的NACK，则为失步状态，所述M为大于等于1的正整数。
可选的，所述第一终端向所述第一终端的接入层上报所述直通链路状态，包括：
所述第一终端周期性向所述第一终端的接入层上报所述直通链路状态。
可选的，所述第一终端监测直通链路质量，包括：
在所述第一终端为所述直通链路上的接收端的情况下，所述第一终端对所述第二终端在所述直通链路发送的PSCCH信号或无线链路监测参考信号(Radio Link Monitoring Reference Signal，RLM-RS)进行监测；或者
在所述第一终端为所述直通链路上的发送端的情况下，所述第一终端对所述第二终端在所述直通链路发送的直通链路反馈信道(Physical sidelink feedback channel，PSFCH)信号或RLM-RS进行监测。
可选的，所述RLM-RS包括如下至少一项：
基于序列的混合自动重传请求确认(Hybrid Automatic Repeat Request Acknowledgement，HARQ-ACK)、解调参考信号(Demodulation Reference Signal，DMRS)、信道状态信息参考信号(Channel State Information Reference Signal，CSI-RS)、同步信号块(Synchronization Signal Block，SSB)。
本公开的一些实施例提供还提供一种终端，所述终端为第一终端，包括：
监测模块，用于监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；或者，
在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
可选的，所述第一状态包括同步状态或者失步状态；
所述第二状态包括None状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
可选的，所述第一终端还包括：
上报模块，用于根据所述接入层接收的直通链路状态，向所述终端的高层进行无线链路失败RLF上报。
可选的，所述上报模块包括如下至少一项：
第一上报单元，用于若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
第二上报单元，用于若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
第三上报单元，用于若所述接入层连续接收到N3个状态，则启动第三 计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
其中，上述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
可选的，所述上报模块用于若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，上述N4和N44为正整数。
本公开的一些实施例还提供一种终端，所述终端为第一终端，包括：收发机、存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，
所述收发机，用于监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
其中，在所述直通链路状态为第一状态的情况下，所述收发机或者所述处理器用于向所述第一终端的接入层上报所述直通链路状态；或者，
在所述直通链路状态为第二状态的情况下，所述收发机或者所述处理器用于向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
可选的，所述第一状态包括同步状态或者失步状态；
所述第二状态包括无效None状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
可选的，所述收发机或者所述处理器还用于：
根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报。
可选的，在所述第一终端为所述直通链路上的接收端的情况下，所述根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报包括如下至少一项：
若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述 第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
其中，上述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
可选的，在所述第一终端为所述直通链路上的发送端的情况下，所述根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报，包括：
若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，上述N4和N44为正整数。
本公开实施还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现本公开的一些实施例提供的直通链路监测方法中的步骤。
本公开的一些实施例中，第一终端监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。这样可以实现对支持单播或组播业务的直通链路进行链路监测，以提高直通链路的监测效果，进而还可以提高单播或组播业务的传输性能。
附图说明
图1是本公开的一些实施例可应用的网络结构示意图；
图2是本公开的一些实施例提供的直通链路监测方法的流程图；
图3是本公开的一些实施例提供的RLF上报的示意图；
图4是本公开的一些实施例提供的RLF上报的另一示意图；
图5是本公开的一些实施例提供的RLF上报的另一示意图；
图6是本公开的一些实施例提供的RLF上报的另一示意图；
图7是本公开的一些实施例提供的终端的结构图；
图8是本公开的一些实施例提供的终端的另一结构图；
图9是本公开的一些实施例提供的终端的另一结构图；以及
图10是本公开的一些实施例提供的终端的另一结构图。
具体实施方式
为使本公开要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
参见图1，图1是本公开的一些实施例可应用的网络结构示意图，如图1所示，包括多个终端11和网络侧设备12，其中，终端11可以是用户终端(User Equipment，UE)或者其他终端设备，例如：手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)、个人数字助理(Personal Digital Assistant，PDA)、移动上网装置(Mobile Internet Device，MID)、可穿戴式设备(Wearable Device)、机器人、车辆等终端侧设备，需要说明的是，在本公开的一些实施例中并不限定终端的具体类型。终端11之间可以直接通信的直通链路称为Sidelink(翻译为直接通信链路或者旁路，也称为直接通信接口或者直通链路接口)，即终端之间可以通过Sidelink进行直接通信。直接通信的终端可以均是在网的，或者均是脱网的，还可以是部分设备在网，部分设备脱网。网络侧设备12可以是基站，例如：宏站、LTE eNB、5G NR NB等；网络侧设备也可以是小站，如低功率节点(Low Power Node，LPN)、pico、femto等小站，或者网络侧设备可以接入点(Access Point，AP)；网络 侧设备也可以是中央单元(Central Unit，CU)与其管理和控制的多个传输接收点(Transmission Reception Point，TRP)共同组成的网络节点，网络侧设备与直接通信的终端侧设备之间的蜂窝通信链路称之为设备到网络(Device to Network，D2N)链路，或称Uu接口。需要说明的是，在本公开的一些实施例中并不限定网络侧设备的具体类型。
请参见图2，图2是本公开的一些实施例提供的一种直通链路监测方法的流程图，如图2所示，包括以下步骤：
201、第一终端监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；或者，
在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
上述第一终端与第二终端之间的直通链路也可以理解为，第一终端与第二终端之间的支持单播或组播业务的链路。
另外，上述第一终端可以对第二终端发送的RLM-RS进行监测，或者可以是第一终端对第二终端发送的PSFCH信号进行监测，或者第一终端对第二终端发送的PSCCH信号进行监测，这里需要解释的是，PSFCH信号可以为PSFCH上承载的HARQ-ACK反馈信号，PSCCH信号可以为PSCCH上承载的调度分配(Scheduling assignment，SA)或直通链路控制信息(Sidelink control information，SCI)信号，其中HARQ-ACK反馈信号包含三种，若正确接收信息，则反馈ACK，若信息接收错误，则反馈NACK，若什么信息都没有接收到，则不反馈，即为非连续传输(Discontinuous Transmission，DTX)。而上述直通链路状态可以是根据第一终端监测上述直通链路质量的监测结果得到的直通链路状态。进一步的，上述直通链路状态可以是直通链路监测质量结果。
上述第一状态和第二状态可以是预先定义的直通链路状态，且是两种不同的直通链路状态。
通过上述步骤可以实现，在直通链路状态为第一状态的情况下，向接入层(Access Stratum，AS)上报该直通链路状态；而在直通链路状态为第二状态的情况下，可以向接入层上报该直通链路状态，或者通过不向接入层上报该直通链路状态，来指示该直通链路状态，也就是说，在接入层未接收到直通链路状态的情况下，接入层确认第一终端监测到的直通链路状态为上述第二状态，从而减少上报，以节约功耗。
本公开的一些实施例中，通过上述步骤可以实现对支持单播或组播业务的直通链路进行链路监测，以提高直通链路的监测效果，进而还可以提高单播或组播业务的传输性能。
作为一种可选的实施方式，所述第一状态包括同步状态(In-sync)或者失步状态(Out-of-sync)；
所述第二状态包括无效(None)状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
其中，上述同步状态和失步状态可以是根据预设门限为判断依据的，例如：如果监测到任何一个RLM-RS的链路质量高于预设第一门限(例如：门限Qin)，则为同步状态，如果监测到所有的RLM-RS的链路质量都低于预设第二门限(例如：门限Qout)，则为失步状态，其中，上述预设第一门限和预设第二门限的取值可以不同或者相同，对此不作限定。
又例如，如果接收到至少一个第二终端发送的PSCCH信号，则为同步状态，如果没有成功接收到任何一个第二终端发送的PSCCH信号，则为失步状态或者为无效(None)状态。
再例如，如果接收到至少一个第二终端发送的PSFCH上承载的ACK或NACK，则为同步状态，如果没有接收到任何一个第二终端发送的PSFCH上承载的信号，则为失步状态。另外，如果第二终端没有发送任何一个PSFCH信号，则为无效(None)状态。
又例如：如果接收到至少一个第二终端发送的PSFCH上承载的ACK，或者接收到小于M个第二终端发送的PSFCH上承载的NACK，则为同步状态；如果接收到大于或者等于M个第二终端发送的PSFCH上承载的NACK，则为失步状态，所述M为大于等于1的正整数。
其中，上述M为网络配置或预配置的或协议规定的。
其中，上述没有接收到任何一个第二终端发送的PSFCH上承载的信号可以是，第二终端未接收到第一终端发送的信息，则不反馈PSFCH信号，即为DTX，从而第一终端没有接收到第二终端发送的PSFCH信号；或者也可以是，第二终端接收到了第一终端发送的信息，并发送了PSFCH反馈信号(若正确接收信息，则反馈ACK，若信息接收错误，则反馈NACK)，但是第一终端没有接收到第二终端发送的PSFCH信号。
其中，上述接收到PSCCH信号或PSFCH信号，可以认为是成功接收PSCCH信号或PSFCH信号，或者可以认为是接收PSCCH信号或PSFCH信号可以识别出该PSCCH信号或PSFCH信号是所述第二终端发送的。
其中，上述对于同步状态和失步状态的解释，可以是在一个周期内监测或检测或接收或测量一个或多个信号得到的直通链路状态，也可以是非周期的监测或检测或接收或测量一个或多个信号得到的直通链路状态，本公开不做限定。
而上述第二终端发送的信号可以是第二终端发送的PSCCH信号或参考信号或者PSFCH信号，例如：在上述第一终端为上述直通链路的接收端，上述第二终端为上述直通链路的发送端的情况下，该信号为PSCCH信号或参考信号，如RLM-RS，在上述第一终端为上述直通链路的发送端，上述第二终端为上述直通链路的接收端的情况下，该信号为参考信号或者PSFCH信号。
另外，上述第一终端未接收到所述第二终端发送的PSCCH信号或参考信号可以是第二终端未发送PSCCH信号或参考信号，或者可以是第二终端发送了PSCCH信号或参考信号，但第一终端未接收到第二终端发送的PSCCH信号或参考信号。例如：在上述第一终端为上述直通链路的接收端，上述第二终端为上述直通链路的发送端的情况下，上述未接收到包括两种含义，第一种是第二终端没有发送PSCCH信号或参考信号，第二种是发送端发送了PSCCH信号或参考信号，但第一端没接收到；在上述第一终端为上述直通链路的发送端，上述第二终端为上述直通链路的接收端的情况下，上述未接收到可以表示上述第二终端未发送信号。
该实施方式中，可以实现通过同步状态、失步状态和None状态准确地表 示上述直通链路的质量状态，以提高监测效果。
作为一种可选的实施方式，上述方法还包括：
所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报。
其中，上述高层可以是接入层的高层(或者可以是接入层的上一层)，如非接入层(Non-Access Stratum，NAS)或者应用层(application layer)。另外，上述RLF上报可以是RLF声明(RLF declaration)。
该实施方式中，可以实现向高层进行RLF上报，从而可以及时进行直通链路的重新建立或者停止信息发送，以提高直通链路的传输性能或节省直通链路的信道资源。
需要说明的是，该实施方式，在上述第一状态包括同步状态或者失步状态，上述第二状态包括None状态的情况下，可以包括如下实施方式：
第一种实施方式，在所述第一终端为所述直通链路上的接收端的情况下，所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报，包括如下至少一项：
若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
其中，上述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
其中，上述接收端可以是在上述直通链路中接收数据的终端。
另外，上述第一计时器、第二计时器、第三计时器的时长可以是预先配 置的、协议预先定义的或者网络侧配置的或者由其他终端配置给接收终端的，其中其他终端可以为发送终端，控制终端，组头或簇头终端，终端组中的管理终端等。且第一计时器、第二计时器、第三计时器的时长可以相同或者不同。另外，本公开的一些实施例中，计时器也可以称作定时器，且计时器均可以是RLF计时器(RLF timer)。
另外，上述第一计时器的时长、第二计时器的时长、第三计时器的时长、N1、N2、N3、N11、N22和N33中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括但不限于如下终端：
发送终端、控制终端、组头终端、簇头终端或者管理终端。
例如：在上述第一终端为上述直通链路的接收终端，上述第二终端为上述直通链路的发送终端的情况下，可以由第二终端、控制终端、组头终端、簇头终端或者终端组中的管理终端等配置上述参数。
而上述接入层连续接收到N3个状态可以是接收到连续的N3个状态均为失步状态和None状态中的状态。例如：以上述N3为3例，若连续接收到失步状态、失步状态和None状态，则启动第三计时器，或者，若连续接收到None状态、失步状态和None状态，则启动第三计时器，或者，若连续接收到None状态、None状态和None状态，则启动第三计时器，或者，连续接收到失步状态、失步状态和失步状态，则启动第三计时器。也就是说，若连续接收到失步状态和/或None状态累计达到N3个，则启动第三计时器。
该实施方式中，接收端可以针对多种情况准确、及时地进行RLF上报，且由于N33大于或者等于N22，N22大于或者等于N11，这样由于None状态有可能发送端没有发送信号，因此，当None状态转为收到同步状态可以尽快停止计时器，以避免错误上报。
第二种实施方式，在所述第一终端为所述直通链路上的发送端的情况下，所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报，包括：
若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所 述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，上述N4和N44为正整数。
其中，所述第四计时器的时长、N4和N44中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括但不限于如下终端：
接收终端、控制终端、组头终端、簇头终端或者管理终端。
例如：在上述第一终端为上述直通链路的发送终端，上述第二终端为上述直通链路的接收终端的情况下，上述第四计时器、N4和N44是预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置给发送终端的，其中其他终端可以为接收终端，控制终端，组头或簇头终端，终端组中的管理终端等。
该实施方式中，可以实现发送端准确、及时地进行RLF上报。
作为一种可选的实施方式，上述第一终端向所述第一终端的接入层上报所述直通链路状态，包括：
所述第一终端周期性向所述第一终端的接入层上报所述直通链路状态。
其中，上报周期可以是网络配置、预配置的或者是协议默认的或者是由其他终端配置给接收终端或发送终端的，例如10ms或者5ms等，其中其他终端可以为发送终端，接收终端，控制终端，组头或簇头终端，终端组中的管理终端等。
该实施方式中，可以实现期性向接入层上报直通链路状态，且可以是在一个周期内上报一个直通链路状态，另外，一个周期的直通链路状态可以是根据该周期内监测的一个或者多个信号得到的直通链路状态。
作为一种可选的实施方式，所述第一终端监测直通链路质量，包括：
在所述第一终端为所述直通链路上的接收端的情况下，所述第一终端对所述第二终端在所述直通链路发送的PSCCH信号或RLM-RS进行监测；或者
在所述第一终端为所述直通链路上的发送端的情况下，所述第一终端对所述第二终端在所述直通链路发送的PSFCH信号或RLM-RS进行监测。
其中，上述RLM-RS可以包括如下至少一项：
HARQ-ACK、DMRS、CSI-RS、SSB。
其中，上述SSB可以是周期性或者非周期性发送的。
另外，上述发送端发送的RLM-RS可以伴随直通链路的数据一起发送，例如：发送端发送的DMRS、CSI-RS或者SSB伴随直通链路的数据一起发送。而上述接收端发送的RLM-RS可以是伴随直通链路的PSFCH一起发送的，例如：接收端发送的DMRS、CSI-RS或者SSB伴随直通链路的PSFCH一起发送，而HARQ-ACK可以是在PSFCH上发送的。
而上述PSFCH信号可以包括：
基于序列的HARQ-ACK；或者
基于DMRS的HARQ-ACK；或者
基于DMRS的信道状态信息(Channel State Information，CSI)报告；或者
基于DMRS的HARQ-ACK和CSI-RS；或者
基于DMRS的CSI报告和CSI-RS。
本公开的一些实施例中，通过上述提供的实施方式可以实现：第一终端根据第一终端和第二终端之间的直通链路监测结果，上报直通链路状态，该直通链路状态包括同步(In-sync)，失步(out-of-sync)和None状态(或者什么都不上报)中的任意一种。
下面分别以第一终端为接收UE和发送UE进行举例说明：
对于接收UE监测直通链路的方法：
可以设定UE上报链路质量的周期，在该周期内，UE物理层需要上报接入层，链路质量结果(即上述直通链路状态)。
其中，上报周期可以是网络配置、预配置的或者是协议默认的或者是由其他UE配置给接收UE或发送UE的，例如10ms或者5ms等，其中其他UE可以为发送UE，接收UE，控制UE，组头或簇头UE，UE组中的管理UE等。
上述上报的链路质量结果包括In-sync，Out-of-sync和None状态，也就是说，上报链路质量，除了上报In-sync和Out-of-sync之外，还会上报None，或者什么都不上报；
对于None状态也可以什么都不上报，从而表示None状态，另外上报In-sync和Out-of-sync可以类似于NR Uu口的上报In-sync和Out-of-sync，例如：根据Qin和Qout的门限判定，如果周期内任何一个RLM-RS的链路质量高于Qin，则上报In-sync，如果周期内所有的RLM-RS的链路质量都低于Qout，则上报Out-of-sync；
或者，如果接收到至少一个第二终端发送的PSCCH信号，则为同步状态，如果没有接收到任何一个第二终端发送的PSCCH信号，则为失步状态或者为无效(None)状态。
其中，上述接收到PSCCH信号或PSFCH信号，可以认为是成功接收PSCCH信号或PSFCH信号，或者可以认为是接收PSCCH信号或PSFCH信号可以识别出该PSCCH信号或PSFCH信号是所述第二终端发送的。
其中，上述对于同步状态和失步状态的解释，可以是在一个周期内监测或接收一个或多个信号得到的直通链路状态，也可以是非周期的监测或接收一个或多个信号得到的直通链路状态，本公开不做限定。
而上报None状态(或者什么都不上报)，存在两种情况：第一种，发送端在周期内确实没有发PSCCH信号或RLM-RS，即发送端在周期内没有发送信号；第二种，发送端在周期内发了PSCCH信号或RLM-RS，即发送端在周期内发送了信号，但由于链路较差，接收端在周期内没有收到任何的PSCCH信号或RLM-RS；
另外，上述RLM-RS可以是指直通链路(SL)口上的DMRS、CSI-RS或者SSB，该DMRS、CSI-RS或者SSB都是伴随SL口的数据一起发送的，因此，如果发送UE没有发送数据也就不会发送RLM-RS。其中，上述SSB可以是周期性或者非周期性发送的。
另外，需要说明的是，由于上述本公开的一些实施例可以应用于NR的直通系统中单播业务或组播业务，以该单播业务为例，直通链路的PSCCH信号或RLM-RS可以是非周期的，因此，存在该周期内没有直通链路的PSCCH信号或RLM-RS的情况。
因此，上报链路质量有3种状态，In-sync、Out-of-sync和None(或者什么都不上报)，具体的RLF流程请见如图3所示的In-Sync&Out-of-sync 状态之间转换，以及如图4所示的In-Sync&None状态之间转换，以及如图5所示的In-Sync&Out-of-sync&None状态之间转换；其中，图5中的连续N3次失步状态或None状态可以表示上述实施方式中描述的连续接收到的N3个状态。
需要说明的是，对于上面的流程，可以保证N33大于或者等于N22，N22大于或者等于N11，因为，None有可能发送UE没有发送信号，因此，当连续收到多个None状态启动RLF timer之后，收到In-sync可以尽快停止RLF timer，避免误报。
其他参数，例如N1，N2，N3，T1，T2，T3，可以相等或不等。另外，对于上面流程中的参数，包括N1，N2，N3，T1，T2，T3，N11，N22，N33，可以通过网络配置，或者通过预配置，或者通过其他UE配置给接收UE，其中其他终端可以为发送UE，控制UE，组头或簇头UE，UE组中的管理UE等。
对于发送UE监测直通链路的方法：
发送UE可以接收到接收UE发送的PSFCH直通链路反馈信道或者RLM-RS进行链路监测；
其中，PSFCH可以设计如下2种：
基于序列的HARQ-ACK；
基于DMRS的HARQ-ACK或CSI report，即HARQ-ACK/CSI report+DMRS，或者也有可能一起发送CSI-RS，即HARQ-ACK/CSI report+DMRS+CSI-RS；
即RLM-RS可以是基于序列的HARQ-ACK或者是DMRS或CSI-RS。
对于发送UE，设定UE上报链路质量的周期，在该周期内，UE物理层需要上报AS层，链路质量指示(即上述直通链路状态)。
其中，上报的链路质量有3种状态，In-sync，Out-of-sync和None(或者什么都不上报)；
对于上报In-sync和Out-of-sync，类似于接收UE；或者，如果接收到至少一个第二终端发送的PSFCH上承载的ACK或NACK，则为同步状态，如果没有接收到任何一个第二终端发送的PSFCH上承载的信号，则为失步状 态。又或者，如果接收到至少一个第二终端发送的PSFCH上承载的ACK，或者接收到小于M个第二终端发送的PSFCH上承载的NACK，则为同步状态；如果接收到大于或者等于M个第二终端发送的PSFCH上承载的NACK，则为失步状态，所述M为大于等于1的正整数。
其中，上述没有接收到任何一个第二终端发送的PSFCH上承载的信号可以是，第二终端未接收到第一终端发送的信息，则不反馈PSFCH信号，即为DTX，从而第一终端没有接收到第二终端发送的PSFCH信号；或者也可以是，第二终端接收到了第一终端发送的信息，并发送了PSFCH反馈信号(若正确接收信息，则反馈ACK，若信息接收错误，则反馈NACK)，但是第一终端没有接收到第二终端发送的PSFCH信号。
其中，上述接收到PSCCH信号或PSFCH信号，可以认为是成功接收PSCCH信号或PSFCH信号，或者可以认为是接收PSCCH信号或PSFCH信号可以识别出该PSCCH信号或PSFCH信号是所述第二终端发送的。
其中，上述对于同步状态和失步状态的解释，可以是在一个周期内监测或接收一个或多个信号得到的直通链路状态，也可以是非周期的监测或接收一个或多个信号得到的直通链路状态，本公开不做限定。
对于上报None(或者什么都不上报)，由于发送UE明确知道，该周期内是否有接收UE发送的PSFCH，因为PSFCH和物理直通链路共享信道(Physical Sidelink Share Channel，PSSCH)之间的时间间隔是已知的，其中，PSSCH可可表示发送UE发送的数据，因此，上报None(或者什么都不上报)，只能是由于该周期内没有接收UE发送的PSFCH，即没有PSFCH信号或RLM-RS。
另外，上述RLM-RS是指SL口上的DMRS、CSI-RS或者SSB，该DMRS、CSI-RS或者SSB都是伴随SL口的PSFCH一起发送的，因此，如果接收UE没有发送PSFCH也就不会发送RLM-RS。
因此，对于发送UE的RLF过程，None(或者什么都不上报)状态不计入In-sync和Out-of-sync的计数器，具体过程请见图6所示的上报流程，其中，对于该流程中的参数，包括N4，T4，N44，可以通过网络配置，或者通过预配置，或者通过其他UE配置给发送UE，其中其他终端可以为接收UE， 控制UE，组头或簇头UE，UE组中的管理UE等。
需要说明的是，图3至图6所示的流程可以是以NR的直通系统中单播业务为例进行说明，组播业务类似，此处不再赘述。
需要说明的是，本公开的一些实施例提供的多种可选的实施方式可以相互结合实现，也可以单独实现，对此不作限定。
本公开的一些实施例中，第一终端监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。这样可以实现对支持单播或组播业务的直通链路进行链路监测，以提高直通链路的监测效果，进而还可以提高单播或组播业务的传输性能。进一步的，可以适用于NR系统中单播或组播业务的直通链路特性，从而提高直通链路监测效果。
请参见图7，图7是本公开的一些实施例提供的一种终端的结构图，该终端为第一终端，如图7所示，终端700包括：
监测模块701，用于监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；或者，
在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
可选的，所述第一状态包括同步状态或者失步状态；
所述第二状态包括None状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
可选的，如图8所求，所述第一终端还包括：
上报模块702，用于根据所述接入层接收的直通链路状态，向所述终端的高层进行无线链路失败RLF上报。
可选的，如图9所示，所述上报模块包括如下至少一项：
第一上报单元7021，用于若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
第二上报单元7022，用于若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
第三上报单元7023，用于若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
其中，上述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
可选的，所述第一计时器的时长、第二计时器的时长、第三计时器的时长、N1、N2、N3、N11、N22和N33中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
发送终端、控制终端、组头终端、簇头终端或者管理终端。
可选的，如果接收到至少一个第二终端发送的PSCCH信号，则为同步状态；如果没有接收到任何一个第二终端发送的PSCCH信号，则为失步状态或者为None状态；或者，
如果接收到至少一个第二终端发送的PSFCH上承载的ACK或NACK，则为同步状态；如果没有接收到任何一个第二终端发送的PSFCH上承载的信号，则为失步状态；或者，
如果接收到至少一个第二终端发送的PSFCH上承载的ACK，或者接收到小于M个第二终端发送的PSFCH上承载的NACK，则为同步状态；如果接收到大于或者等于M个第二终端发送的PSFCH上承载的NACK，则为失 步状态，所述M为大于等于1的正整数。
可选的，所述上报模块702用于若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，上述N4和N44为正整数。
可选的，所述第四计时器的时长、N4和N44中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
接收终端、控制终端、组头终端、簇头终端或者管理终端。
可选的，所述第一终端向所述第一终端的接入层上报所述直通链路状态，包括：
所述第一终端周期性向所述第一终端的接入层上报所述直通链路状态。
可选的，监测模块701用于在所述第一终端为所述直通链路上的接收端的情况下，所述第一终端对所述第二终端在所述直通链路发送的PSCCH信号或RLM-RS进行监测；或者
监测模块701在所述第一终端为所述直通链路上的发送端的情况下，所述第一终端对所述第二终端在所述直通链路发送的PSFCH信号或RLM-RS进行监测。
可选的，所述RLM-RS包括如下至少一项：
HARQ-ACK、DMRS、CSI-RS、SSB。
本公开的一些实施例提供的第一终端能够实现如图2所示方法实施例中的各个过程，且能够取得相同的有益效果，为避免重复在此不再赘述。
请参见图10，图10是本公开的一些实施例提供的另一种终端的结构图，该终端为第一终端，如图10所示，该第一终端包括：收发机1010、存储器1020、处理器1000及存储在所述存储器1020上并可在所述处理器1000上运行的程序，其中：
所述收发机1010，用于监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
其中，在所述直通链路状态为第一状态的情况下，所述收发机1010或者 所述处理器1000用于向所述第一终端的接入层上报所述直通链路状态；或者，
在所述直通链路状态为第二状态的情况下，所述收发机或者所述处理器用于向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
其中，收发机1010可以用于在处理器1000的控制下接收和发送数据。
在图10中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1000代表的一个或多个处理器和存储器1020代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1010可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。
处理器1000负责管理总线架构和通常的处理，存储器1020可以存储处理器1000在执行操作时所使用的数据。
需要说明的是，存储器1020并不限定只在第一终端上，可以将存储器1020和处理器1000分离处于不同的地理位置。
可选的，所述第一状态包括同步状态或者失步状态；
所述第二状态包括无效None状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
可选的，所述收发机1010或者所述处理器1000还用于：
根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报。
可选的，在所述第一终端为所述直通链路上的接收端的情况下，所述根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报包括如下至少一项：
若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所 述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
其中，上述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
可选的，所述第一计时器的时长、第二计时器的时长、第三计时器的时长、N1、N2、N3、N11、N22和N33中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
发送终端、控制终端、组头终端、簇头终端或者管理终端。
可选的，如果接收到至少一个第二终端发送的PSCCH信号，则为同步状态；如果没有接收到任何一个第二终端发送的PSCCH信号，则为失步状态或者为None状态；或者，
如果接收到至少一个第二终端发送的PSFCH上承载的ACK或NACK，则为同步状态；如果没有接收到任何一个第二终端发送的PSFCH上承载的信号，则为失步状态；或者，
如果接收到至少一个第二终端发送的PSFCH上承载的ACK，或者接收到小于M个第二终端发送的PSFCH上承载的NACK，则为同步状态；如果接收到大于或者等于M个第二终端发送的PSFCH上承载的NACK，则为失步状态，所述M为大于等于1的正整数。
可选的，在所述第一终端为所述直通链路上的发送端的情况下，所述根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报，包括：
若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，上述N4和N44为正整数。
可选的，所述第四计时器的时长、N4和N44中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
接收终端、控制终端、组头终端、簇头终端或者管理终端。
可选的，所述向所述第一终端的接入层上报所述直通链路状态，包括：
周期性向所述第一终端的接入层上报所述直通链路状态。
可选的，所述监测直通链路质量，包括：
在所述第一终端为所述直通链路上的接收端的情况下，对所述第二终端在所述直通链路发送的PSCCH信号或RLM-RS进行监测；或者
在所述第一终端为所述直通链路上的发送端的情况下，对所述第二终端在所述直通链路发送的PSFCH信号或RLM-RS进行监测。
可选的，所述RLM-RS包括如下至少一项：
HARQ-ACK、DMRS、CSI-RS、SSB。
需要说明的是，本实施例中上述第一终端可以是本公开的一些实施例中方法实施例中任意实施方式的第一终端，本公开的一些实施例中方法实施例中第一终端的任意实施方式都可以被本实施例中的上述第一终端所实现，以及达到相同的有益效果，此处不再赘述。
本公开实施还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现本公开的一些实施例提供的直通链路监测方法中的步骤。
在本申请所提供的几个实施例中，应该理解到，所揭露方法和装置，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单 元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开各个实施例所述直通链路的传输方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
可以理解的是，本公开实施例描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现，模块、单元、子模块、子单元等可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits，ASIC)、数字信号处理器(Digital Signal Processing，DSP)、数字信号处理设备(DSP Device，DSPD)、可编程逻辑设备(Programmable Logic Device，PLD)、现场可编程门阵列(Field-Programmable Gate Array，FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本公开所述功能的其它电子单元或其组合中。
对于软件实现，可通过执行本公开实施例所述功能的模块(例如过程、函数等)来实现本公开实施例所述的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执 行。某些步骤可以并行或彼此独立地执行。
以上所述是本公开的可选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (22)

  1. 一种直通链路监测方法，包括：
    第一终端监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
    其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；或者，
    在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
  2. 如权利要求1所述的方法，其中，所述第一状态包括同步状态或者失步状态；
    所述第二状态包括无效None状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
  3. 如权利要求2所述的方法，还包括：
    所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报。
  4. 如权利要求3所述的方法，其中，在所述第一终端为所述直通链路上的接收端的情况下，所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报，包括如下至少一项：
    若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
    若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
    若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3 为失步状态和None状态的个数之和；
    其中，所述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
  5. 如权利要求4所述的方法，其中，所述第一计时器的时长、第二计时器的时长、第三计时器的时长、N1、N2、N3、N11、N22和N33中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
    发送终端、控制终端、组头终端、簇头终端或者管理终端。
  6. 如权利要求3所述的方法，其中，在所述第一终端为所述直通链路上的发送端的情况下，所述第一终端根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报，包括：
    若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，所述N4和N44为正整数。
  7. 如权利要求6所述的方法，其中，所述第四计时器的时长、N4和N44中的至少一项为：预先配置的、协议预先定义的或者网络侧配置的或者由其他终端配置的，其中，所述其他终端包括：
    接收终端、控制终端、组头终端、簇头终端或者管理终端。
  8. 如权利要求1至7中任一项所述的方法，其中，如果接收到至少一个第二终端发送的直通链路物理控制信道PSCCH信号，则为同步状态；如果没有接收到任何一个第二终端发送的PSCCH信号，则为失步状态或者为None状态；或者，
    如果接收到至少一个第二终端发送的PSFCH上承载的ACK或NACK，则为同步状态；如果没有接收到任何一个第二终端发送的PSFCH上承载的信号，则为失步状态；或者，
    如果接收到至少一个第二终端发送的PSFCH上承载的ACK，或者接收到小于M个第二终端发送的PSFCH上承载的NACK，则为同步状态；如果接收到大于或者等于M个第二终端发送的PSFCH上承载的NACK，则为失 步状态，所述M为大于等于1的正整数。
  9. 如权利要求1至7中任一项所述的方法，其中，所述第一终端向所述第一终端的接入层上报所述直通链路状态，包括：
    所述第一终端周期性向所述第一终端的接入层上报所述直通链路状态。
  10. 如权利要求1至7中任一项所述的方法，其中，所述第一终端监测直通链路质量，包括：
    在所述第一终端为所述直通链路上的接收端的情况下，所述第一终端对所述第二终端在所述直通链路发送的PSCCH信号或无线链路监测参考信号RLM-RS进行监测；或者
    在所述第一终端为所述直通链路上的发送端的情况下，所述第一终端对所述第二终端在所述直通链路发送的直通链路反馈信道PSFCH信号或RLM-RS进行监测。
  11. 如权利要求10所述的方法，其中，所述RLM-RS包括如下至少一项：
    基于序列的混合自动重传请求确认HARQ-ACK、解调参考信号DMRS、信道状态信息参考信号CSI-RS、同步信号块SSB。
  12. 一种终端，所述终端为第一终端，包括：
    监测模块，用于监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
    其中，在所述直通链路状态为第一状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态；或者，
    在所述直通链路状态为第二状态的情况下，所述第一终端向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
  13. 如权利要求12所述的终端，其中，所述第一状态包括同步状态或者失步状态；
    所述第二状态包括None状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
  14. 如权利要求13所述的终端，其中，所述第一终端还包括：
    上报模块，用于根据所述接入层接收的直通链路状态，向所述终端的高层进行无线链路失败RLF上报。
  15. 如权利要求14所述的终端，其中，所述上报模块包括如下至少一项：
    第一上报单元，用于若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
    第二上报单元，用于若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
    第三上报单元，用于若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
    其中，所述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
  16. 如权利要求14所述的终端，其中，所述上报模块用于若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，所述N4和N44为正整数。
  17. 一种终端，所述终端为第一终端，包括：收发机、存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，其中，
    所述收发机，用于监测直通链路质量，获得直通链路状态，所述直通链路为所述第一终端与第二终端之间的直通链路；
    其中，在所述直通链路状态为第一状态的情况下，所述收发机或者所述处理器用于向所述第一终端的接入层上报所述直通链路状态；或者，
    在所述直通链路状态为第二状态的情况下，所述收发机或者所述处理器 用于向所述第一终端的接入层上报所述直通链路状态，或者通过不向所述接入层上报所述直通链路状态，指示所述直通链路状态。
  18. 如权利要求17所述的终端，其中，所述第一状态包括同步状态或者失步状态；
    所述第二状态包括None状态，其中，在所述第一终端未接收到所述第二终端发送的信号的情况下，所述直通链路状态为所述None状态。
  19. 如权利要求18所述的终端，其中，所述收发机或者所述处理器还用于：
    根据所述接入层接收的直通链路状态，向所述第一终端的高层进行RLF上报。
  20. 如权利要求19所述的终端，其中，在所述第一终端为所述直通链路上的接收端的情况下，所述根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报包括如下至少一项：
    若所述接入层连续接收到N1个失步状态，则启动第一计时器，在所述第一计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第一计时器停止的条件包括所述接入层连续接收到N11个同步状态；
    若所述接入层连续接收到N2个None状态，则启动第二计时器，在所述第二计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第二计时器停止的条件包括所述接入层连续接收到N22个同步状态；
    若所述接入层连续接收到N3个状态，则启动第三计时器，在所述第三计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第三计时器停止的条件包括所述接入层连续接收到N33个同步状态，所述N3为失步状态和None状态的个数之和；
    其中，所述N1、N2、N3、N11、N22和N33为正整数，且N33大于或者等于N22，N22大于或者等于N11。
  21. 如权利要求19所述的终端，其中，在所述第一终端为所述直通链路上的发送端的情况下，所述根据所述接入层接收的直通链路状态，向所述第一终端的高层进行无线链路失败RLF上报，包括：
    若所述接入层连续接收到N4个失步状态，则启动第四计时器，在所述 第四计时器超时的情况下，向所述第一终端的高层进行RLF上报，其中，所述第四计时器停止的条件包括所述接入层连续接收到N44个同步状态，其中，所述N4和N44为正整数。
  22. 一种计算机可读存储介质，其上存储有计算机程序，其中，该程序被处理器执行时实现如权利要求1至11中任一项所述的直通链路监测方法中的步骤。
PCT/CN2020/079832 2019-03-28 2020-03-18 直通链路监测方法和终端 Ceased WO2020192508A1 (zh)

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