CN112583556B

CN112583556B - Method and device for determining wireless link state of direct link

Info

Publication number: CN112583556B
Application number: CN201910943892.1A
Authority: CN
Inventors: 赵锐; 任晓涛; 郑石磊; 马腾; 房家奕; 赵丽
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2022-06-07
Anticipated expiration: 2039-09-30
Also published as: CN112583556A

Abstract

The embodiment of the invention provides a method and a device for determining a wireless link state of a through link, wherein the method comprises the steps that a first terminal obtains a detection result corresponding to a wireless signal sent by a second terminal, which is detected in a wireless link monitoring window corresponding to a wireless link state reporting moment; the first terminal and the second terminal are in communication connection through a direct link, and the reporting time of the wireless link state is periodic; and counting the accumulated times meeting the preset conditions in the detection results in the wireless link monitoring window, and determining the wireless link state of the direct link corresponding to the wireless link state reporting time according to the accumulated times. In each wireless link state reporting time, the first terminal determines the wireless link state at the current reporting time according to the wireless signal sent by the second terminal detected in a wireless link monitoring window before the wireless link state reporting time, so that the link state is periodically determined based on the aperiodic measuring signal.

Description

Method and device for determining wireless link state of direct link

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for determining a wireless link state of a direct link.

Background

In a conventional Long Term Evolution (LTE) system, services of a direct communication interface only support broadcast services, and for NR (New Radio, New air interface), services of the direct communication interface are richer than that of LTE, and besides the broadcast services, unicast and multicast services are also supported. For the unicast service, it means that two User Equipments (UEs) perform communication, and a link connection needs to be established and managed and maintained.

In contrast to the link between the UE and the base station, the reference signal transmitted on the link between the UE and the base station is periodic, while the signal transmitted on the link between two UEs is aperiodic, but periodic link status is required for link management. Therefore, how to determine the link status of the link between two UEs based on aperiodic radio signals on the link is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the invention provides a method and a device for determining a wireless link state of a direct link, which are used for determining the link state of the link based on aperiodic wireless signals on the link between two pieces of UE.

In a first aspect, an embodiment of the present invention provides a method for determining a wireless link state of a direct link, where the method includes:

a first terminal acquires a detection result corresponding to a wireless signal sent by a second terminal and detected in a wireless link monitoring window corresponding to a wireless link state reporting moment; the first terminal and the second terminal are in communication connection through the direct link, and the wireless link state reporting time is periodic;

counting the accumulated times of the detection results meeting preset conditions in the wireless link monitoring window, wherein the preset conditions correspond to the signal types of the wireless signals one to one;

and determining the wireless link state of the straight-through link corresponding to the reporting time of the wireless link state according to the accumulated times.

Further, the determining the radio link state of the direct link corresponding to the radio link state reporting time according to the accumulated number of times includes:

if the accumulated times is larger than or equal to a given threshold value, determining that the wireless link state of the straight-through link corresponding to the reporting time is a synchronous state;

and if the accumulated times are smaller than the given threshold value, determining that the wireless link state of the straight-through link corresponding to the reporting time is an out-of-step state.

Further, one or more of the length L of the radio link monitoring window, the period T occurring at the radio link status reporting time, and the threshold N are determined in a preconfigured manner, or are set locally by the first terminal according to preset information.

Further, the preset information includes one or more of the following parameters:

QoS of the service interacted between the first terminal and the second terminal straight-through link;

the service priority of the straight-through link interaction between the first terminal and the second terminal;

a system congestion degree of the first terminal and the second terminal direct link;

the respective moving speeds of the first terminal and the second terminal;

and a relative movement speed of the first terminal and the second terminal.

Further, the wireless signal sent by the second terminal and detected in the wireless link monitoring window corresponding to the wireless link state reporting time of the first terminal includes multiple signal types or only includes one signal type.

Further, the wireless signal sent by the second terminal and detected in the wireless link monitoring window corresponding to the wireless link state reporting time is an aperiodic wireless signal.

Further, if the wireless signal is the DMRS of the PSCCH sent by the second terminal, the preset condition includes that an RSRP received by the first terminal for the DMRS is greater than a threshold RSRP, or includes that an SINR received by the first terminal for the DMRS is greater than a threshold SINR;

if the wireless signal is the DMRS of the PSSCH sent by the second terminal equipment, the preset condition comprises that the RSRP received by the first terminal on the DMRS is greater than a threshold of RSRP, or that the SINR received by the first terminal on the DMRS is greater than a threshold of SINR;

if the wireless signal is a CSI-RS of a direct link sent by the second terminal, the preset condition includes that an RSRP received by the CSI-RS by the first terminal is greater than a threshold of RSRP, or includes that an SINR received by the CSI-RS by the first terminal is greater than a threshold of SINR;

if the wireless signal is a PSCCH sent by the second terminal, the preset condition includes that the first terminal successfully detects the PSCCH;

if the wireless signal is a PSFCH sent by the second terminal, the preset condition includes that the first terminal successfully detects the PSFCH;

If the wireless signal is the S-SSB sent by the second terminal, the preset condition includes that the SS-SINR received by the S-SSB by the first terminal is greater than a threshold of SINR.

In a second aspect, an embodiment of the present invention provides an apparatus for determining a wireless link state of a direct link, including:

the apparatus is disposed in a first terminal, and the first terminal and a second terminal are communicatively connected through the direct link, the apparatus includes:

the acquisition module is used for acquiring a detection result corresponding to a wireless signal sent by the second terminal and detected in a wireless link monitoring window corresponding to the wireless link state reporting time; wherein, the wireless link state reporting time is periodically generated;

the statistical module is used for counting the accumulated times meeting preset conditions in the detection results in the wireless link monitoring window, wherein the preset conditions correspond to the signal types of the wireless signals one to one;

and the determining module is used for determining the wireless link state of the straight-through link corresponding to the wireless link state reporting time according to the accumulated times.

Further, the determining module is specifically configured to:

Further, one or more of the length L of the radio link monitoring window, the period T occurring at the radio link status reporting time, and the threshold N are determined in a preconfigured manner, or are set locally by the determining device according to preset information.

the QoS of the service interacted between the first terminal and the second terminal through link;

the service priority of the direct link interaction between the first terminal and the second terminal;

the respective moving speeds of the first terminal and the second terminal;

and a relative movement speed of the first terminal and the second terminal.

Further, the wireless signal sent by the second terminal and detected in the wireless link monitoring window corresponding to the wireless link state reporting time includes multiple signal types or only includes one signal type.

In a third aspect, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor performs the following steps.

Acquiring a detection result corresponding to a wireless signal sent by a second terminal and detected in a wireless link monitoring window corresponding to the wireless link state reporting time; the electronic equipment is in communication connection with the second terminal through a direct link, and the wireless link state reporting time is periodic;

Further, the determining the radio link status of the direct link corresponding to the radio link status reporting time according to the accumulated number of times includes:

And if the accumulated times are less than the given threshold value, determining that the wireless link state of the straight-through link corresponding to the reporting moment is in an out-of-step state.

Further, one or more of the length L of the radio link monitoring window, the period T occurring at the radio link status reporting time, and the threshold N are determined in a preconfigured manner, or are set locally by the electronic device according to preset information.

the QoS of the service interacted between the electronic equipment and the second terminal straight-through link;

the service priority of the interaction between the electronic equipment and the second terminal through link;

a system congestion degree of the electronic device and the second terminal direct link;

the respective moving speeds of the electronic equipment and the second terminal;

and the relative movement speed of the electronic equipment and the second terminal.

Further, the radio signal sent by the second terminal and detected in the radio link monitoring window corresponding to the radio link state reporting time is an aperiodic radio signal.

Further, if the wireless signal is a DMRS of a PSCCH transmitted by the second terminal, the preset condition includes that an RSRP received by the electronic device for the DMRS is greater than a threshold RSRP, or that an SINR received by the electronic device for the DMRS is greater than a threshold SINR;

if the wireless signal is the DMRS of the PSSCH transmitted by the second terminal device, the preset condition comprises that the RSRP received by the electronic device for the DMRS is greater than a threshold of RSRP, or that the SINR received by the electronic device for the DMRS is greater than a threshold of SINR;

if the wireless signal is a CSI-RS of a direct link sent by the second terminal, the preset condition includes that an RSRP received by the electronic device for the CSI-RS is greater than a threshold of RSRP, or includes that an SINR received by the electronic device for the CSI-RS is greater than a threshold of SINR;

if the wireless signal is a PSCCH transmitted by the second terminal, the preset condition includes that the PSCCH is successfully detected by the electronic equipment;

If the wireless signal is a PSFCH sent by the second terminal, the preset condition includes that the electronic device successfully detects the PSFCH;

if the wireless signal is the S-SSB sent by the second terminal, the preset condition includes that the SS-SINR received by the electronic device for the S-SSB is greater than a threshold of SINR. In a fourth aspect, embodiments of the invention provide a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method as provided in the first aspect.

According to the method and the device for determining the wireless link state of the through link, provided by the embodiment of the invention, at the reporting time of each wireless link state, the wireless link state at the current reporting time is determined according to the wireless signal detected in the wireless link monitoring window before the reporting time of the wireless link state, so that the link state of the through link is periodically determined based on the aperiodic measurement signal.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a diagram illustrating direct communication according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating radio link failure detection in accordance with an embodiment of the present invention;

fig. 3 is a schematic flowchart of a method for determining a wireless link state of a direct link according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a direct link wireless monitoring provided in an embodiment of the present invention;

FIG. 5 is a statistical diagram illustrating the cumulative count according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an apparatus for determining a wireless link status of a direct link according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

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

The embodiments of the present invention are designed for link management between two UEs in a unicast service of a direct communication interface of an NR system, and may determine a periodic link state based on measurement of a non-periodic link signal. In order to better understand the technical contents of the embodiments of the present invention, some technical contents related to the embodiments of the present invention are described below.

Background related to direct communication for LTE systems. Devices and devices in close proximity to each other allow direct communication between the devices to take place directly. Fig. 1 is a schematic diagram of direct communication in an embodiment of the present invention, and as shown in fig. 1, for convenience of description, a direct communication link between a device and the device is defined as a Sidelink link, and a corresponding wireless interface of the direct communication link is referred to as a direct communication interface (also referred to as a Sidelink interface); the cellular communication link between the network and the direct communication device is called uulink, and its corresponding interface is called Uu interface.

The devices that communicate directly may all be on-line or off-line, or some may be on-line and some off-line. The devices participating in direct communication, i.e. on-line, are located within the coverage of the 3GPP base station communication carrier, and the devices participating in direct communication, i.e. off-line, are not located within the coverage of the 3GPP base station communication carrier. Typical communication scenarios for direct communication include the following three:

one-to-one communication (unicast) between direct communication terminals;

a device can send the same data to all devices in a communication group at a time (multicast);

one device can send the same data (broadcast) to all nearby devices at once (LTE systems only support broadcast).

In a unicast service scenario of the NR system direct communication interface, RRC connection between two UEs is supported, and management and maintenance of the RRC connection, that is, RLM (Radio Link Monitoring) and RLF (Radio Link Failure declaration), are also required.

Comparing the NR Uu port (communication interface between UE and base station), the RLM and RLF procedures for the NR Uu port are as follows:

in the RRC _ CONNECTED state, while the UE performs radio link monitoring RLM, the UE continuously monitors the downlink radio link quality of the serving cell, determines whether the UE IS in an in-sync (IS) or out-of-sync (OOS) state with the serving cell, and periodically reports the IS/OOS state to a higher layer, i.e., an access layer, of the UE. The higher layer will decide the subsequent operation according to the IS/OOS status reported by the physical layer signaling, for example: a Radio Link Failure (RLF) procedure is triggered and an RRC connection re-establishment procedure is initiated.

RLM IS a process In which a UE In a connected state monitors the downlink radio link quality by measuring a downlink RLM Reference Signal (RLM-RS) Of a serving cell, and determines whether the UE IS In a downlink In-Sync (IS) or Out-Of-Sync (OOS) state with the serving cell. In the RLM process, the UE physical layer firstly obtains a quality value capable of reflecting a downlink wireless link, such as SS-SINR or CSI-SINR, through periodically measuring the configured RLM-RS, and then compares the measured value with the synchronization and desynchronization threshold value set inside the UE to judge the IS/OOS state of the UE. The in-sync and out-of-sync thresholds are configured by the network side. The higher layer will decide the next actions, such as declaring radio link failure, re-establishing RRC connection, etc., based on the IS/OOS report.

In the non-DRX mode, the RLM IS/OOS reporting period IS the maximum value between the shortest period and 10 milliseconds in all configured RLM-RS resources. In the DRX mode, the RLM IS/OOS reporting period IS the maximum value between the shortest period in all configured RLM-RS resources and the DRX period.

There are three cases of reporting RLF classification by the Uu port, and since there is no random access at the SL port, there are only two cases: the RLF Timer times out and the RLC reaches the maximum number of retransmissions. Embodiments of the present invention are designed for RLF Timer timeouts.

Fig. 2 is a schematic diagram of radio link failure detection in the embodiment of the present invention, and as for the RLF Timer timeout process, when the UE is in the RRC connected state, the UE always performs RLM. When the link quality is detected to be lower than a threshold value, "out-of-sync" is reported, if N310 "out-of-sync" are reported continuously, an RLF Timer T310 is started, before the T310 is overtime, if N311 "in-sync" are received continuously, the T310 is stopped, otherwise, when the T310 is overtime, RLF classification is reported.

Description of NR V2X. In NR V2X, the following channels are defined:

a pscch (physical downlink Control channel) for carrying SA (Scheduling Assignment) information, indicating a resource location of transmission of the associated pscch, a modulation mode, and other necessary Control information for a receiving end to detect the pscch.

PSSCH (physical Sidelink Share channel) is used to carry the transmitted data.

PSFCH (physical Sidelink Feedback channel) is used for carrying Feedback information of HARQ ACK/NACK associated with PSSCH. The configuration of NR V2X may or may not include PSFCH resources. If the PSFCH resource is included, the PFSCH resource is configured to occur every N slot intervals, where N may be 1, 2, or 4.

Further, at NR V2X, a CSI-RS for direct link channel measurement and a DMRS for PSCCH/PSCCH demodulation are also defined.

For NR, the main differences between unicast traffic in traffic of a direct communication interface (sidelink SL) and the existing NR Uu interface technology are:

an NR Uu port only needs UE to perform RLM/RLF, and in a unicast scene of an NR SL port, both sending UE and receiving UE need to perform RLM/RLF;

the RLM-RS of the NR Uu port is a periodic measurement signal, but in the unicast scenario of the NR SL port, without a separate RLM-RS, the reference signal on the through link is transmitted with the through link data signal, i.e. if the data signal on the through link is non-periodic, there is no periodic signal on the through link for the RLM measurement, i.e. the measurement signal of the RLM on the through link may be non-periodic.

However, for the RLF procedure, if the existing RLF procedure is multiplexed, a periodic determination of the link status is required, and the embodiments of the present invention provide a solution for how to periodically determine the link status based on the aperiodic RLM measurement signal.

Fig. 3 is a schematic flow chart of a method for determining a wireless link state of a direct link according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:

step 300, the first terminal obtains a detection result corresponding to a wireless signal sent by the second terminal and detected in a wireless link monitoring window corresponding to the wireless link state reporting time; the first terminal and the second terminal are in communication connection through the direct link, and the wireless link state reporting time is periodic;

in the unicast service of the direct link, the first terminal and the second terminal are in communication connection through the direct link. The embodiment of the invention takes the first terminal as an execution main body of the method flow for introduction.

Fig. 4 is a schematic view of wireless monitoring of a direct link according to an embodiment of the present invention, and as shown in fig. 4, reporting times of wireless link states occur periodically, that is, time intervals T between reporting time 1, reporting time 2, and reporting time 3 are the same, and reporting times of wireless link states occur periodically. As shown in fig. 4, each radio link state reporting time corresponds to a radio link detection window, for example, reporting time 1 corresponds to a radio link detection window 1, reporting time 2 corresponds to a radio link detection window 2, and reporting time 3 corresponds to a radio link detection window 3, and each radio link state reporting time periodically occurs at the end time of the corresponding radio link detection window. Each wireless link monitoring window has a certain length L on the time axis, that is, within the time included in the wireless link monitoring window, the first terminal receives the wireless signal sent by the second terminal. The first terminal needs to obtain a detection result corresponding to the wireless signal sent by the second terminal, which is detected in the wireless link monitoring window corresponding to each wireless link state reporting time.

Step 301, counting the accumulated times meeting preset conditions in the detection results in the wireless link monitoring window, wherein the preset conditions correspond to the signal types of the wireless signals one to one;

and aiming at a wireless link monitoring window corresponding to each wireless link state reporting moment, the first terminal needs to detect a wireless signal sent by the second terminal through the direct link in the wireless link monitoring window, obtain a detection result of each wireless signal, and judge whether the detection result of each wireless signal meets a preset condition. It is to be understood that the wireless signal may include one or more signal types, and each signal type uniquely corresponds to a preset condition to determine the detection result of the wireless signal of the signal type. Specifically, after it is determined that the detection result of a wireless signal satisfies the corresponding preset condition, the processing of adding 1 to the accumulated number of times may be performed, so that after it is determined whether the detection result of the wireless signal detected in the complete wireless link monitoring window satisfies the corresponding preset condition, the accumulated number of times satisfying the preset condition in the detection result in the wireless link monitoring window may be obtained.

Fig. 5 is a schematic diagram illustrating statistics of the accumulated times according to an embodiment of the present invention, as shown in fig. 5, in a radio link monitoring window corresponding to a radio link state reporting time, a first terminal receives a plurality of radio signals sent by a second terminal and learns that 4 of the radio signals satisfy a preset condition according to respective detection results, so that the accumulated times is set to 4.

Step 302, determining the radio link status of the direct link corresponding to the radio link status reporting time according to the accumulated times.

After obtaining the accumulated times, the first terminal may determine, according to the accumulated times, the radio link state of the direct link corresponding to the radio link state reporting time. As can be seen from fig. 4, since the reporting time of each radio link state is periodic, the radio link state of the direct link determined according to the accumulated number of times is also periodic.

As shown in fig. 5, the second terminal sends a wireless signal on the direct link in an aperiodic manner, and the first terminal detects the wireless signal sent by the second terminal in the wireless link monitoring window, where it can be seen that the cumulative number of times meeting the preset condition IS 4, and when the threshold N IS set to 3, the wireless link state corresponding to the time of reporting the wireless link state IS the IS state.

In the method for determining a radio link state of a direct link provided in the embodiment of the present invention, at each radio link state reporting time, a first terminal determines a radio link state at a current reporting time according to a radio signal sent by a second terminal detected in a radio link monitoring window before the radio link state reporting time, so that the link state is periodically determined based on an aperiodic measurement signal.

On the basis of the above method embodiment, determining the radio link state of the direct link corresponding to the radio link state reporting time according to the accumulated times includes:

Specifically, when the number of times of accumulation that a detected wireless signal of a first terminal in a wireless link monitoring window L meets a preset condition IS greater than or equal to a threshold value N, the link state of the wireless link IS considered to be IS; otherwise, the link status of the wireless link is considered to be OOS.

It is to be understood that, if the first terminal does not detect any wireless signal in the wireless link monitoring window, the cumulative number is 0, and the link status of the wireless link may be considered to be OOS.

Further, in the embodiment of the method, one or more of the length L of the radio link monitoring window, the period T occurring at the radio link status reporting time, and the threshold N are determined in a preconfigured manner, or are set locally by the first terminal according to preset information. The pre-configuration may include the network side configured through signaling, or may be pre-written into the first terminal.

In addition, the first terminal locally sets one or more of the length L of a wireless link monitoring window, the period T occurring at the wireless link state reporting time, and the threshold N according to preset information, wherein the preset information includes one or more of the following parameters:

The respective moving speeds of the first terminal and the second terminal;

and a relative movement speed of the first terminal and the second terminal.

As described above, there are different combinations of the methods for obtaining the parameters of the length L of the monitoring window of the wireless link, the threshold N and the period T:

one possibility is that: the length L, the threshold N and the period T of the wireless link monitoring window can be determined by adopting a pre-configuration or configuration method;

another possibility is that the length L, the threshold N and the period T of the radio link monitoring window are determined by a pre-configuration or configuration method in one part and are determined locally by the first terminal in the other part;

yet another possibility is: the length L, the threshold N and the period T of the radio link monitoring window are all determined locally by the first terminal.

In the above embodiments of the method, different preset conditions exist for different wireless signals, specifically as follows:

if the wireless signal is the DMRS of the PSCCH sent by the second terminal, the preset condition comprises that the RSRP received by the first terminal on the DMRS is greater than a threshold of RSRP, or that the SINR received by the first terminal on the DMRS is greater than a threshold of SINR;

In the above embodiments of the method, the wireless signal sent by the second terminal and detected in the wireless link monitoring window corresponding to the wireless link state reporting time of the first terminal includes multiple signal types, or only includes one signal type. Specifically, the wireless signal for determining the wireless link status may be a combination of one or more of the above wireless signals, for example: the PSCCH and the PSFCH may be included at the same time as radio signals used for radio link status monitoring, and therefore, in the calculation of the number of times of accumulation that satisfies the preset condition, the number of times of detection that both the radio signals satisfy the preset condition may be accumulated.

In the above method embodiments, the wireless signal sent by the second terminal and detected in the wireless link monitoring window corresponding to the reporting time of the wireless link state is an aperiodic wireless signal, so that the link state is periodically determined based on the aperiodic measurement signal. Of course, the wireless signal sent by the second terminal and detected in the wireless link monitoring window corresponding to the wireless link state reporting time may also be a periodic wireless signal, and the embodiment of the present invention is not limited at all.

Specific embodiments are given below in which the first terminal determines the length L, the threshold N and the period T of the radio link monitoring window based on a combination of one or more of QoS of the traffic, priority of the traffic, congestion level of the through link, terminal movement speed or relative movement speed.

An example is as follows:

the period T and the threshold N are parameters of pre-configuration or network configuration, wherein the first terminal determines the length L of the wireless link monitoring window according to the congestion degree of the through link, and the parameter of the congestion degree of the straight link may be characterized by CBR (channel Busy ratio), in general, the larger CBR is, the more congested the system is, the larger the length L of the corresponding wireless link monitoring window is. Correspondingly, the system may also configure or pre-configure a table, and the first terminal obtains the value of the length L of the radio link detection window according to the locally detected CBR value table.

Congestion degree CBR of direct link	Length L of radio link monitoring window
		CBRI≤CBR＜CBR2	L1
CBR2≤CBR＜CBR3	L2
		CBR3≤CBR＜CBR4	L3

Optionally, the length of the wireless link monitoring window is L1 ≤ L2 ≤ L3.

Example two is as follows:

the period T and the length L of the wireless link monitoring window are parameters of pre-configuration or network configuration, wherein the first terminal determines the size of the threshold N according to the congestion degree of the through link, and the parameter of the congestion degree of the straight link can be represented by CBR (channel Busy ratio), in general, the larger the CBR is, the more congested the system is, the smaller the corresponding threshold N is. Correspondingly, the system may also configure or pre-configure the following table, and the first terminal obtains the value of the threshold N according to the locally detected CBR value table.

Congestion degree CBR of straight-through link	Threshold value N
		CBR1≤CBR＜CBR2	N1
CBR2≤CBR＜CBR3	N2
		CBR3≤CBR＜CBR4	N3

Optionally, the threshold N1 is more than or equal to N2 more than or equal to N3.

Furthermore, the first terminal determines the length L, the threshold N and the period T of the radio link monitoring window at each radio link state reporting time according to one or more combinations of the QoS of the service, the priority of the service, the congestion degree of the direct link, the terminal moving speed or the relative moving speed. Correspondingly, one or more of the length L, the threshold N and the period T of the radio link monitoring window determined by the first terminal at the reporting time of the radio link state at each time may be different.

In the method for determining the wireless link state of the direct link provided in the embodiment of the present invention, the physical layer of the first terminal periodically determines the wireless link state (IS/OOS state) of the direct link between the first terminal and the second terminal according to the received wireless signal sent by the second terminal on the direct link, the physical layer of the first terminal notifies the wireless link state (IS/OOS state) of the direct link to the upper layer of the first terminal, and the upper layer of the first terminal determines whether to declare the wireless link failure of the direct link between the first terminal and the second terminal.

Fig. 6 is a schematic structural diagram of a device for determining a wireless link state of a direct link according to an embodiment of the present invention, where the device is disposed in a first terminal, and the first terminal and a second terminal are communicatively connected through the direct link, and the device includes an obtaining module 601, a counting module 602, and a determining module 603, where:

an obtaining module 601, configured to obtain a detection result corresponding to a wireless signal sent by a second terminal and detected in a wireless link monitoring window corresponding to a wireless link state reporting time; wherein, the wireless link state reporting time is periodically generated; the counting module 602 is configured to count accumulated times that satisfy a preset condition in a detection result in the wireless link monitoring window, where the preset condition corresponds to a signal type of the wireless signal one to one; the determining module 603 is configured to determine, according to the accumulated times, a radio link state of the direct link corresponding to the radio link state reporting time.

Specifically, the obtaining module 601 needs to detect the wireless signal sent by the second terminal through the direct link in the wireless link monitoring window, obtain a detection result of each wireless signal, and determine whether the detection result of each wireless signal meets a preset condition. It is understood that the wireless signal may include one or more signal types, and each signal type uniquely corresponds to a preset condition to determine the detection result of the wireless signal of the signal type. The counting module 602 performs the processing of adding 1 to the accumulated number of times after determining that the detection result of a wireless signal satisfies the corresponding preset condition, so that the accumulated number of times that satisfies the preset condition in the detection result in the wireless link monitoring window can be obtained after determining whether the detection result of the wireless signal detected in the complete wireless link monitoring window satisfies the corresponding preset condition. After obtaining the accumulated times, the determining module 603 may determine the radio link state of the direct link corresponding to the reporting time of the radio link state according to the accumulated times.

On the basis of the above device embodiment, the determining module 601 is specifically configured to:

the respective moving speeds of the first terminal and the second terminal;

and a relative movement speed of the first terminal and the second terminal.

The above apparatus embodiment is specifically configured to execute the processes described in the above method embodiments, and the functions of the apparatus embodiment may refer to the above method embodiments, which are not described herein again.

The device for determining the radio link state of the through link according to the embodiment of the present invention determines, at each radio link state reporting time, the radio link state at the current reporting time according to the radio signal sent by the second terminal detected in the radio link monitoring window before the radio link state reporting time, thereby realizing periodic determination of the link state based on the aperiodic measurement signal.

Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 7, the electronic device may include: a processor (processor)710, a communication Interface (Communications Interface)720, a memory (memory)730, and a communication bus 740, wherein the processor 710, the communication Interface 720, and the memory 730 communicate with each other via the communication bus 740. Processor 710 may call logic instructions in memory 730 to perform the following method: acquiring a detection result corresponding to a wireless signal sent by a second terminal and detected in a wireless link monitoring window corresponding to the wireless link state reporting time; the electronic equipment is in communication connection with the second terminal through a direct link, and the wireless link state reporting time is periodic; counting the accumulated times of the detection results meeting preset conditions in the wireless link monitoring window, wherein the preset conditions correspond to the signal types of the wireless signals one to one; and determining the wireless link state of the straight-through link corresponding to the reporting time of the wireless link state according to the accumulated times.

Specifically, the electronic device needs to detect the wireless signal sent by the second terminal through the direct link within the wireless link monitoring window, obtain a detection result of each wireless signal, and determine whether the detection result of each wireless signal meets a preset condition. It is to be understood that the wireless signal may include one or more signal types, and each signal type uniquely corresponds to a preset condition to determine the detection result of the wireless signal of the signal type. After the detection result of a wireless signal is judged and obtained to meet the corresponding preset condition, the 1 adding processing of the accumulated times is carried out, so that the accumulated times meeting the preset condition in the detection result in the wireless link monitoring window can be obtained after whether the detection result of the wireless signal detected in the whole wireless link monitoring window meets the corresponding preset condition is judged. After the accumulated times are obtained, the wireless link state of the straight-through link corresponding to the wireless link state reporting time can be determined according to the accumulated times.

On the basis of the above embodiment of the electronic device, determining the radio link state of the direct link corresponding to the radio link state reporting time according to the accumulated number of times includes:

Further, if the wireless signal is the DMRS of the PSCCH transmitted by the second terminal, the preset condition includes that an RSRP received by the electronic device for the DMRS is greater than a threshold RSRP, or that an SINR received by the electronic device for the DMRS is greater than a threshold SINR;

if the wireless signal is the DMRS of the PSSCH transmitted by the second terminal equipment, the preset condition comprises that the RSRP received by the electronic equipment on the DMRS is greater than a threshold of RSRP, or that the SINR received by the electronic equipment on the DMRS is greater than a threshold of SINR;

if the wireless signal is a PSCCH sent by the second terminal, the preset condition includes that the electronic device successfully detects the PSCCH;

If the wireless signal is the PSFCH sent by the second terminal, the preset condition includes that the electronic device successfully detects the PSFCH;

if the wireless signal is an S-SSB sent by the second terminal, the preset condition includes that the SS-SINR received by the electronic device for the S-SSB is greater than a threshold of SINR. In addition, the logic instructions in the memory 730 can be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes 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 invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, for example, the method includes: a first terminal acquires a detection result corresponding to a wireless signal sent by a second terminal and detected in a wireless link monitoring window corresponding to a wireless link state reporting moment; the first terminal and the second terminal are in communication connection through the direct link, and the wireless link state reporting time is periodic; counting the accumulated times of the detection results meeting preset conditions in the wireless link monitoring window, wherein the preset conditions correspond to the signal types of the wireless signals one to one; and determining the wireless link state of the straight-through link corresponding to the reporting time of the wireless link state according to the accumulated times.

The above-described embodiments of the apparatus are merely illustrative, and 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 modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for determining a wireless link status of a direct link, comprising:

the method comprises the steps that a first terminal obtains a detection result corresponding to a wireless signal sent by a second terminal and detected in a wireless link monitoring window corresponding to a wireless link state reporting moment; the first terminal and the second terminal are in communication connection through the direct link, and the wireless link state reporting time is periodic;

determining the wireless link state of the straight-through link corresponding to the wireless link state reporting time according to the accumulated times;

the determining the radio link state of the direct link corresponding to the reporting time of the radio link state according to the accumulated times includes:

if the accumulated times is smaller than the given threshold value, determining that the wireless link state of the straight-through link corresponding to the reporting moment is an out-of-step state;

One or more of the length L of the radio link monitoring window, the period T occurring at the radio link status reporting time, and the threshold N are determined in a preconfigured manner, or are set locally by the first terminal according to preset information.

2. The method according to claim 1, wherein the preset information comprises one or more of the following parameters:

a system congestion degree of a direct link between the first terminal and the second terminal;

the respective moving speeds of the first terminal and the second terminal;

and a relative movement speed of the first terminal and the second terminal.

3. The method according to any one of claims 1 to 2, wherein the wireless signal sent by the second terminal and detected by the first terminal in the wireless link monitoring window corresponding to the reporting time of the wireless link state includes multiple signal types or only includes one signal type.

4. The method according to any one of claims 1 to 2, wherein the radio signal sent by the second terminal and detected in the radio link monitoring window corresponding to the reporting time of the radio link state is an aperiodic radio signal.

5. The method for determining the radio link status of a direct link according to any one of claims 1 to 2, wherein:

If the wireless signal is a PSCCH transmitted by the second terminal, the preset condition includes that the first terminal successfully detects the PSCCH;

if the wireless signal is the PSFCH sent by the second terminal, the preset condition includes that the first terminal successfully detects the PSFCH;

if the wireless signal is an S-SSB sent by the second terminal, the preset condition includes that the SS-SINR received by the S-SSB by the first terminal is greater than a threshold of SINR.

6. An apparatus for determining a radio link status of a direct link, the apparatus being disposed in a first terminal, the first terminal and a second terminal being communicatively connected via the direct link, the apparatus comprising:

the acquisition module is used for acquiring a detection result corresponding to a wireless signal sent by the second terminal and detected in a wireless link monitoring window corresponding to the wireless link state reporting time; the wireless link state reporting time is periodically generated;

A determining module, configured to determine, according to the accumulated times, a radio link state of the direct link corresponding to the radio link state reporting time;

the determining module is specifically configured to:

one or more of the length L of the radio link monitoring window, the period T occurring at the radio link status reporting time, and the threshold N are determined in a preconfigured manner, or are set locally by the determining means according to preset information.

7. The apparatus for determining the wireless link status of a direct link according to claim 6, wherein the preset information comprises one or more of the following parameters:

the respective moving speeds of the first terminal and the second terminal;

and a relative movement speed of the first terminal and the second terminal.

8. The apparatus according to any of claims 6 to 7, wherein the radio signal transmitted by the second terminal detected in the radio link monitoring window corresponding to the reporting time of the radio link status includes multiple signal types or only includes one signal type.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

one or more of the length L of the radio link monitoring window, the period T occurring at the radio link status reporting time, and the threshold N are determined in a preconfigured manner, or are set locally by the electronic device according to preset information.

10. The electronic device of claim 9, wherein the preset information comprises one or more of the following parameters:

11. The electronic device according to any of claims 9-10, wherein the wireless signal transmitted by the second terminal detected in the wireless link monitoring window corresponding to the reporting time of the wireless link status includes multiple signal types or only includes one signal type.

12. The electronic device according to any of claims 9-10, wherein the wireless signal sent by the second terminal and detected in the wireless link monitoring window corresponding to the reporting time of the wireless link status is an aperiodic wireless signal.

13. The electronic device of any of claims 9-10, wherein:

if the wireless signal is the DMRS of the PSCCH sent by the second terminal, the preset condition comprises that the RSRP received by the electronic equipment on the DMRS is greater than a threshold of RSRP, or that the SINR received by the electronic equipment on the DMRS is greater than a threshold of SINR;

if the wireless signal is the S-SSB sent by the second terminal, the preset condition includes that the SS-SINR received by the electronic device for the S-SSB is greater than a threshold of SINR.

14. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for determining a radio link status of a direct link according to any one of claims 1 to 5.