CN115516998A

CN115516998A - Direct connection communication method and device

Info

Publication number: CN115516998A
Application number: CN202280003124.8A
Authority: CN
Inventors: 赵群
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-12-23
Also published as: WO2024031716A1

Abstract

The disclosure provides a direct connection communication method and device, and relates to the field of communication. In the method, UE acquires first configuration information of a direct connection SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT; determining a logical time unit of a second RAT according to the first configuration information and the second configuration information. The method and the device aim at the coexistence situation that the two RATs work on the same carrier frequency, the two RATs are considered for determining the logic time unit at the same time, a foundation is provided for the user equipment to use the direct connection link for communication service, and communication interference possibly caused when the two RATs coexist is avoided.

Description

Direct connection communication method and device

Technical Field

The present disclosure relates to the field of mobile communications technologies, and in particular, to a direct communication method and apparatus.

Background

With the continuous evolution of communication technologies, more and more users hold mobile devices or Internet of Things (IoT) devices, such as direct communication (Sidelink, SL) and the like provide technical support for object-object interconnection for a plurality of application scenes, and meanwhile, the continuous emergence of new generation of novel Internet application puts higher requirements on wireless communication technology. In the current application of SL Technology, only one Radio Access Technology (RAT) is considered for determining the logical time unit, and the problem of determining the logical time unit when two RATs coexist on the same carrier has not been solved.

Disclosure of Invention

The present disclosure provides a direct communication method and apparatus, which provide a scheme for determining a logical time unit by considering configuration information of two RATs when a terminal user equipment UE coexists in the two RATs, and provide a basis for a user equipment to use a direct link for a communication service, so as to avoid communication interference that may occur when the two RATs coexist.

A first aspect of the present disclosure provides a direct communication method, which is performed by a terminal user equipment UE, and the method includes: acquiring first configuration information of a direct connection SL synchronization resource of a first Radio Access Technology (RAT) on a first carrier and second configuration information of a SL synchronization resource of a second RAT; determining a logical time unit of a second RAT according to the first configuration information and the second configuration information.

In some embodiments of the present disclosure, the first RAT is LTE, and the second RAT is NR.

In some embodiments of the present disclosure, the obtaining first configuration information of a direct SL synchronization resource of a first radio access technology RAT and second configuration information of a SL synchronization resource of a second RAT on a first carrier includes: reading the pre-configuration data of the UE to acquire the first configuration information and the second configuration information; or receiving downlink control information sent by a network device to obtain the first configuration information and the second configuration information.

In some embodiments of the present disclosure, the method further comprises: determining a time unit in which a SL synchronization resource of the second RAT is located.

In some embodiments of the disclosure, the determining a time unit in which the synchronization resource of the second RAT is located comprises: determining a second time unit of the second RAT, which is coincident with a first time unit of the first RAT in a time domain, as a time unit in which an SL synchronization resource of the second RAT is located.

In some embodiments of the disclosure, the determining a time unit in which the synchronization resource of the second RAT is located comprises: determining a first time unit reserved by the first RAT and not used for SL communication according to first configuration information; determining a second time unit of the second RAT, which is overlapped with the first time unit in a time domain, as a time unit in which SL synchronization resources of the second RAT are located.

In some embodiments of the present disclosure, the determining a logical time unit of a second RAT according to the first configuration information and the second configuration information comprises: and determining a second RAT logical time unit from the physical time unit of the time unit in which the SL synchronization resource of the second RAT is removed according to the first configuration information and the second configuration information.

In some embodiments of the present disclosure, the determining a logical time unit of a second RAT according to the first configuration information and the second configuration information comprises: determining a logical time unit of the second RAT from physical time units excluding a time unit in which an SL synchronization resource of the second RAT is located and a time unit in which an SL synchronization resource of the first RAT is located according to the first configuration information and the second configuration information.

A second aspect of the present disclosure provides a direct connection communication apparatus, which includes an obtaining module, configured to obtain first configuration information of a direct connection SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT; a determining module, configured to determine a logical time unit of a second RAT according to the first configuration information and the second configuration information.

An embodiment of a third aspect of the present disclosure provides a communication device, including: a transceiver; a memory; and the processor is respectively connected with the transceiver and the memory, is configured to control the transceiver to receive and transmit wireless signals by executing computer-executable instructions on the memory, and can implement the method described in the embodiment of the first aspect of the present disclosure.

A fourth aspect of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer executable instructions; the computer-executable instructions, when executed by a processor, enable the method described in the embodiments of the first aspect of the present disclosure to be implemented.

In summary, according to the direct communication method and apparatus provided by the present disclosure, the UE may obtain first configuration information of a direct SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT; determining a logical time unit of a second RAT according to the first configuration information and the second configuration information. According to the coexistence situation that the two RATs work on the same carrier frequency, the UE determines the logic time unit by considering the configuration information of the two RATs when the two RATs coexist, a basis is provided for the user equipment to use the direct connection link for communication service, and communication interference possibly caused when the two RATs coexist is avoided.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a manner of determining logical time units according to an embodiment of the present disclosure;

fig. 2 is a flow chart diagram of a direct communication method according to an embodiment of the present disclosure;

fig. 3 is a flow chart illustrating a method of direct communication according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a method for determining a synchronized time unit according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a manner of determining logical time units according to an embodiment of the present disclosure;

fig. 6 is a block diagram of a direct communication device according to an embodiment of the present disclosure;

fig. 7 is a block diagram of a direct communication device according to an embodiment of the present disclosure;

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

fig. 9 is a schematic structural diagram of a chip according to an embodiment of the disclosure.

Detailed Description

Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present disclosure, and should not be construed as limiting the present disclosure.

With the rapid development of mobile communication technology, the internet of things technology is a necessary trend for the development of future communication networks, and a direct communication technology with more friendly performance is developed on the basis of the third Generation Partnership project (3 gpp) standard. The continuous emergence of new generation of new internet applications (such as vehicle wireless communication technology (V2X)) puts higher demands on wireless communication technology, driving the continuous evolution of wireless communication technology to meet the application requirements.

In order to better support vehicle networking communication, in the transition process between the third generation mobile communication technology (3G) and the fourth generation mobile communication technology (4G), LTE V2X is established in Long Term Evolution (LTE) Release14 (LTE Release 14) to support communication between vehicle networking devices (such as vehicle-to-vehicle, vehicle-to-person, vehicle-to-roadside nodes) through direct links (Sidelink, SL). In Release15 (Release 15) later, LTE V2X technology is enhanced, and functions such as carrier aggregation are supported. In the Fifth Generation mobile communication technology (5G), after Release15 version of the 5G New air interface (New Radio, NR) technology is formulated, 3GPP starts the work of supporting communication of the internet of vehicles by using the NR interface, completes 5G SL in Release16, and supports direct communication between the devices of the internet of vehicles by the NR technology. Because of the different physical layer designs of LTE and NR, there is no direct communication between LTE V2X and NR V2X devices.

Furthermore, since the update time of the vehicle is relatively long, a coexistence problem between the LTE V2X-capable car networking device and the NR V2X-capable car networking device needs to be considered. Only the case where LTE V2X and NR V2X operate on different carrier frequencies is considered in Release 16. In the recent discussion of 3gpp Release 18, a coexistence situation in which LTE V2X and NR V2X work on the same carrier frequency is discussed, and it is proposed that it is desirable to support that two V2X technologies can dynamically share time-frequency resources on the same carrier frequency. Since LTE V2X is a pre-emptive system, it should be considered important to improve NR V2X to support shared spectrum resources.

In the related art, in order to support transmission and reception of the SL synchronization signal, both NR and LTE need to configure SL synchronization time-frequency resources. The SL resource pools used for SL communication of NR and LTE are defined on respective logical time units, where LTE is a logical subframe (logical subframe) and NR is a logical slot (logical slot), and thus the logical time units need to be determined.

However, in an application scenario, when the UE supports two RATs, for example, the UE supports both LTE SL technology and NR SL technology, and when the UE performs direct communication between UEs, for example, communicates with other UEs supporting LTE SL technology through LTE communication technology or communicates with other UEs supporting NR SL technology through NR communication technology, if each RAT only removes the time unit of the respective SL synchronization signal or broadcast channel, the determined logical time units of the two RATs may be different. For example, a synchronized time unit of LTE SL may belong to a logical time unit of NR SL and vice versa. Since the SL resource pool is defined on a logical unit, it may cause the resource pool of LTE SL to contain NR synchronization time units, or the resource pool of NR SL to contain LTE synchronization time units, causing unnecessary interference. Therefore, the two RATs need to be considered simultaneously to determine the logical time unit, so as to avoid the problems of communication performance degradation and the like caused by the collision of the two RATs in different application scenarios.

Therefore, the present disclosure provides a direct communication method and device, which provide a scheme for determining a logical time unit by considering configuration information of two RATs when a terminal user equipment UE coexists in the two RATs, and provide a basis for a user equipment to use a direct link for a communication service, so as to avoid communication interference that may be generated when the two RATs coexist.

The direct communication method and apparatus provided in the present application are described in detail below with reference to the accompanying drawings.

Before describing detailed embodiments of the present disclosure, a method for determining logical time units in a scenario in which communication is performed using direct communication technology is described. As shown in fig. 1, fig. 1 is a schematic diagram illustrating a determination manner of a logical time unit in direct connection communication.

The logical time unit is a time unit remaining after removing a time unit used by the respective RAT to transmit the SL synchronization signal and the broadcast channel, a time unit in which time-frequency resources of the SL are insufficient, and a reserved time unit. In other words, for any RAT, after time units for transmitting the SL synchronization signal and the broadcast channel, time units with insufficient time-frequency resources of the SL, and reserved time units are removed from all physical time units, the remaining physical time units are used as logical time units for transmitting communication information.

The time unit with insufficient time-frequency resources of the SL may be, for example, a time unit for downlink transmission. As another example, in a Time Division Duplex (TDD) network, the OFDM symbols of a slot may be divided into downlink, flexible, or uplink, wherein the Time-frequency resources of the uplink are insufficient to support SL communication Time units are also removed.

When two RATs coexist on the same carrier at the same time, if each RAT removes only the time unit of the respective SL synchronization signal or broadcast channel, the logical time units of the two RATs determined to be different. For example, a synchronized time unit of LTE SL may belong to a logical time unit of NR SL and vice versa. Since the SL resource pool is defined on the logical unit, it may cause the resource pool of the LTE SL to include the NR synchronization time units, or the resource pool of the NR SL includes the LTE synchronization time units, causing unnecessary interference.

To solve the above problem, the following describes a manner in which the UE determines the logical time unit when two RATs coexist on the same carrier at the same time with reference to fig. 2 to 5.

Fig. 2 shows a flow diagram of a direct communication method, which may be performed by an end User Equipment (UE). In the present disclosure, user equipment UE includes, but is not limited to, smart terminal devices, cellular phones, wireless devices, handsets, mobile units, vehicles, in-vehicle devices, and the like.

In an embodiment of the present disclosure, the solution provided by the present disclosure may be used for a Fifth Generation mobile communication technology (5G) and its subsequent communication technologies, such as a Fifth Generation mobile communication technology evolution (5G-advanced), a Sixth Generation mobile communication technology (six Generation, 6G), and the like, which are not limited in the present disclosure.

As shown in fig. 2, the method may include the following steps.

S201, obtain first configuration information of a direct SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT.

In an embodiment of the present disclosure, the configuration information may be resource pool configuration information of the UE. Specifically, the configuration information includes first configuration information of a first direct link (SL) synchronization resource of a first Radio Access Technology (RAT) on a first carrier, and second configuration information of a second SL synchronization resource of a second RAT.

In an embodiment of the present disclosure, the first RAT may be Long Term Evolution (LTE) technology, and the first SL synchronization resource of the first RAT may be an LTE SL synchronization resource. The second RAT may be a New Radio (NR) technology, and the second SL synchronization resource of the second RAT may be an NRSL synchronization resource.

It can be understood that, for LTE, only the location of the synchronization time unit needs to be configured, and the LTE SL synchronization time unit location may be included in the first configuration information. For example, the UE may determine the time domain position of the synchronization resource of the LTE SL through (pre-) configuration or configuration information obtained by receiving downlink control information of the base station. For NR, the time domain position of the synchronization time unit and the number of time units in each period may be included in the second configuration information. For example, when the UE supports both LTE SL and NR SL, the UE may acquire the time domain location of the synchronization resource of LTE SL through the LTE RAT and inform the NR RAT of the information.

A key scenario discussed in embodiments of the present disclosure is that LTE SL and NR SL coexist on the same carrier.

It should be understood that the UE may configure the resource pool of the UE based on the configuration information, where the resource pool configuration described in this disclosure refers to the configuration of the second SL resource pool, i.e., the NR SL resource pool. In addition, the present disclosure does not limit whether the UE is a receiving UE or a transmitting UE, it being understood that the configuration of the UE is aligned between the receiving UE and the transmitting UE for direct communication between the UEs.

In addition, the UE may obtain the first configuration information or the second configuration information from a pre-configuration of the UE, for example, by reading pre-configuration data stored in a UE chip. Alternatively, in some embodiments of the present disclosure, the UE may obtain the first configuration information or the second configuration information by receiving downlink control information sent by the network device, and obtaining configuration data from the downlink control information. The present disclosure does not limit the manner in which the UE acquires the configuration information.

In the application scenario of 5G, the network device may be a 5G radio access network (NG-RAN) node, such as a gNB or a NG-eNB, where the gNB may be used for independent networking, and the NG-eNB may be used for downward compatibility with a 4G network to adapt to application requirements of different core networks, and specific examples thereof depend on the application scenario, which is not limited herein.

S202, determining a logic time unit of a second RAT according to the first configuration information and the second configuration information.

It is understood that, in the related art, the logical time unit is a time unit remaining after time units used by respective RATs for transmitting the SL synchronization signal and the broadcast channel, time units where time-frequency resources of the SL are insufficient, and reserved time units are removed. In other words, for any RAT, after time units for transmitting the SL synchronization signal and the broadcast channel, time units with insufficient time-frequency resources of the SL, and reserved time units are removed from all physical time units, the remaining physical time units are used as logical time units for transmitting communication information.

For example, the logical time unit of LTE is a time unit remaining after removing a time unit used for transmitting the SL synchronization signal and the broadcast channel of LTE, a time unit with insufficient time-frequency resources of SL, and a reserved time unit; the logical time unit of NR is a time unit from which NR is removed a time unit for transmitting SL synchronization signals and broadcast channels, a time unit in which time-frequency resources of SL are insufficient, and a time unit remaining after the reserved time unit, in other words, each RAT determines a logical time unit of each RAT, respectively.

However, for the case that the UE supports both LTE SL and NR SL, when both RATs coexist on the same carrier, if each RAT removes only the time unit of the SL synchronization signal or the broadcast channel, the logical time units of the two RATs obtained through the determination may be different. For example, a synchronized time unit of LTE SL may belong to a logical time unit of NR SL and vice versa. Since the SL resource pool is defined on a logical unit, it may cause the resource pool of LTE SL to contain NR synchronization time units, or the resource pool of NR SL to contain LTE synchronization time units, causing unnecessary interference.

Therefore, in the embodiment of the present disclosure, the logical time unit of NR is determined in consideration of the configuration cases of two RATs.

In other words, in the embodiments of the present disclosure, the UE determines the logical time unit of the NR according to the first configuration information of the LTE and the second configuration information of the NR, and compared with the prior art, the configuration situations of two RATs are considered.

It should be understood that the time units described in the embodiments of the present disclosure may include slots (slots), subframes (subframes), frames (frames), subslots (subslots), OFDM symbols (symbols), and the like, and are not limited in the present disclosure.

In summary, according to the direct communication method provided by the present disclosure, the UE may obtain first configuration information of a direct SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT; determining a logical time unit of a second RAT according to the first configuration information and the second configuration information. According to the coexistence situation that the two RATs work on the same carrier frequency, the UE determines the logic time unit by considering the configuration information of the two RATs when the two RATs coexist, a basis is provided for the user equipment to use the direct connection link for communication service, and communication interference possibly caused when the two RATs coexist is avoided.

Based on the embodiment shown in fig. 2, fig. 3 is a schematic flowchart illustrating a direct communication method according to an embodiment of the present disclosure. The method may be performed by a UE. As shown in fig. 3, the method may include the steps of:

s301, obtain first configuration information of a direct SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT.

In an embodiment of the present disclosure, the first RAT may be Long Term Evolution (LTE) technology, and the first SL synchronization resource of the first RAT may be an LTE SL synchronization resource. The second RAT may be a New Radio (NR) technology, and the second SL synchronization resource of the second RAT may be an NR SL synchronization resource.

Step S301 in this embodiment is the same as step S201 in the above embodiment in principle, and other corresponding explanations may refer to step S201, which is not described herein again.

S302, determine a time unit in which the SL synchronization resource of the second RAT is located.

In the embodiment of the present disclosure, the problem mainly solved by the present disclosure is to avoid unnecessary interference caused by the fact that the resource pool of the LTE SL contains the NR synchronization time units or the resource pool of the NR SL contains the LTE synchronization time units due to the respective RATs determining the logical time units when the LTE SL and the NR SL coexist on the same carrier, and the two RATs are considered at the same time for the determination of the logical time units.

Since the SL resource pool is defined on the logical unit, the determination of the logical time unit requires removing the time unit where the synchronization resource is located. Therefore, in the present embodiment, the determination method of the time unit in which the NR SL synchronization resource is located is described with emphasis.

In an optional embodiment of the present disclosure, determining a time unit in which the synchronization resource of the second RAT is located comprises: determining a second time unit of the second RAT, which is coincident with a first time unit of the first RAT in a time domain, as a time unit in which an SL synchronization resource of the second RAT is located.

In other words, the time unit in which the second RAT synchronization resource is located and the time unit in which the first RAT synchronization resource is located coincide in the time domain.

Specifically, the synchronization resource of the NRSL and the synchronization resource of the LTE SL may be Frequency-division multiplexed (FDM).

Based on the above description, as an example, as shown in fig. 4, fig. 4 shows an example of a method of determining a time unit of an NR SL synchronization resource. Here, for example, when the sub-carrier space (SCS) of the NR SL is 15KHz, the time length of one time unit (slot) of the NR SL is equal to the time length of one time unit (subframe) of the LTE SL. Assuming that subframe n in LTE SL is configured as the time unit in which the resource of LTE SL synchronization signal/broadcast channel is transmitted; for NR SLs coexisting on the same carrier, slot m temporally coincident with subframe n may be configured as a time unit where resources of NR SL synchronization signals/broadcast channels are transmitted. Since the periods of the sets of synchronization resources of the NR SL and the LTE SL are equal (160 ms), the sets of synchronization resources of the two RATs can be completely configured on the time-frequency resources with the same time domain, so that when the NR logical time unit is determined, the time unit of the synchronization resource used for transmitting the synchronization signal or the broadcast channel can be removed, and the situation that the logical time units of the two RATs are different is avoided.

For another example, when the sub-carrier space (SCS) of the NR SL is 30KHz, the time length of one time unit (slot) of the NR SL and the time length of one time unit (subframe) of the LTE SL are in a double relationship, that is, the length of one LTE subframe is equal to the length of two NR slots. Assuming that subframe n in LTE SL is configured as the time unit in which the resource of LTE SL synchronization signal/broadcast channel is transmitted; for NR SLs coexisting on the same carrier, two slots m temporally coincident with subframe n may be configured as time units where resources of NR SL synchronization signals/broadcast channels are transmitted. The synchronization resources of the two RATs can be completely configured on the time-frequency resources with the same time domain, and a group of LTE synchronization resources and two groups of NR synchronization resources are configured on the time units with the same time domain, so that when the NR logical time units are determined, the time units used for transmitting synchronization signals or synchronization resources of broadcast channels can be removed, thereby avoiding the situation that the logical time units of the two RATs are different.

The frequency domain position of the synchronization Resource of LTE SL in the subframe is not adjustable, and it is located on 6 Physical Resource Blocks (PRBs) centered on the center frequency position of the carrier, while the frequency domain position of the synchronization Resource of NR SL can be set by configuration (or called, pre-configuration). Therefore, the frequency domain position of the NR SL synchronization resource can be arranged at a position that does not coincide with the LTE SL synchronization resource frequency domain.

It should be understood that, in the present embodiment, other types of time units (e.g., reserved time units or insufficient time units) that need to be removed for determining the logical time unit are not changed, and may be the same as the prior art, and are not described herein again.

In another optional embodiment of the present disclosure, determining a time unit in which the synchronization resource of the second RAT is located comprises: determining a first time unit reserved by the first RAT and not used for SL communication according to first configuration information; determining a second time unit of the second RAT, which is coincident with the first time unit in a time domain, as a time unit in which a SL synchronization resource of the second RAT is located.

Specifically, as described in fig. 1, since in the determination process of the logical time unit, the synchronization time unit, the reserved time unit, and the insufficient time unit need to be removed from the physical time unit to obtain the logical time unit, when configuring the NR time unit for transmitting the synchronization resource, the time unit for transmitting the synchronization resource NR may also be configured on a time slot where subframes reserved by LTE, which are not used for transmitting the SL resource, coincide in the time domain.

In other words, the time unit in which the second RAT synchronization resource is located and the time unit reserved by the second RAT for no SL communication coincide in the time domain.

The time unit reserved by LTE not to perform SL communication may be related to the location of the synchronization time unit, for example, calculated according to the location of the synchronization time unit in the first configuration information of LTE by a formula.

Therefore, in the embodiment, the NR synchronization resource is set on the subframe reserved in LTE, so that the NR synchronization resource does not overlap with the LTE logical subframe in time domain.

S303, determining a logical time unit of a second RAT according to the first configuration information and the second configuration information.

Specifically, in an optional embodiment of the present disclosure, a second RAT logical time unit may be determined from physical time units excluding a time unit in which a SL synchronization resource of the second RAT is located according to the first configuration information and the second configuration information.

In the present embodiment, based on the time units (synchronized time units) in which the SL synchronization resources of the NR determined in step S302 are located, these synchronized time units are removed from the physical time units, and in the remaining time units, NR logical time units are determined. The NR synchronization time unit may be an NR time unit (slot) that overlaps in the time domain with a time unit (subframe) in which the SL synchronization resource of LTE is located, as described in the above embodiment, or an NR time unit (slot) that overlaps in the time domain with a time unit (subframe) reserved by LTE in which no SL communication is performed.

In short, in the physical time unit from which the NR synchronization time unit is removed, other time units that should be removed as described in the embodiment shown in fig. 1 are removed, and the remaining time units are determined as logical time units.

In another optional embodiment of the present disclosure, determining a logical time unit of a second RAT according to the first configuration information and the second configuration information may further include: determining a logical time unit of the second RAT from physical time units excluding a time unit in which a SL synchronization resource of the second RAT is located and a time unit in which a SL synchronization resource of the first RAT is located according to the first configuration information and the second configuration information.

As shown in FIG. 5, FIG. 5 illustrates another logical time unit determination scheme. When the NR logical time unit is determined, the time unit (LTE synchronization subframe) where the SL synchronization resource of LTE is located and the time unit (NR synchronization slot) where the SL synchronization resource of NR is located may be removed, and in the remaining physical time unit, for example, the time units that should be removed as described in the embodiment shown in fig. 1 are removed again, and the remaining time unit is determined as a logical time unit.

In summary, according to the direct communication method provided by the present disclosure, the UE may obtain first configuration information of a direct connection SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT, determine a synchronization time unit first, and then determine a logical time unit of the second RAT according to the first configuration information and the second configuration information. According to the coexistence situation that the two RATs work on the same carrier frequency, the UE determines the logic time unit by considering the configuration information of the two RATs when the two RATs coexist, a basis is provided for the user equipment to use the direct connection link for communication service, and communication interference possibly caused when the two RATs coexist is avoided. The embodiment provides an optional mode for determining the synchronization time unit, and expands the boundary for determining the logical time unit when two RATs coexist, thereby avoiding communication interference possibly caused by coexistence of the two RATs in a more flexible configuration mode.

It should be understood that the solution provided by the above embodiments of the present disclosure achieves the purpose that when the NR SL and the LTE SL share the same carrier, the time slots that coincide with the time domain of the subframe where the LTE SL synchronization resource is located need to be removed when determining the logical time unit of the NR SL. This can avoid time synchronization between the NR SL resource pool configured on the NR SL logical slot and the synchronization signal of the LTE SL.

In addition, the "determining a logical time unit" in the embodiments described in fig. 1 to fig. 5 may specifically refer to determining an index (index) of a logical time unit, and the "removing a XXX time unit from a physical time unit" described above may specifically refer to removing an index of a time unit, which will not be described in detail herein, and specific implementations thereof may refer to related standards.

Therefore, when the NR SL and the LTE SL coexist on one carrier, the embodiments of the present disclosure solve the problem that the resource pool of the LTE SL contains NR synchronization time units or the resource pool of the NR SL includes LTE synchronization time units, which may be caused by separately considering a single RAT determination logic time unit, by frequency division multiplexing synchronization resources of two RATs or by removing time slots that coincide with the LTE SL synchronization resources when the NR determines a NR SL logical time slot, and avoid the occurrence of unnecessary interference in the SL communication process.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of the user equipment. In order to implement the functions in the method provided by the embodiment of the present application, the user equipment may include a hardware structure and a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Some of the above functions may be implemented by a hardware structure, a software module, or a hardware structure plus a software module.

The embodiments of the direct communication method are also applicable to the direct communication device provided in this embodiment, and are not described in detail in this embodiment.

Fig. 6 is a schematic structural diagram of a direct connection communication apparatus 600 according to an embodiment of the present disclosure, where the direct connection communication apparatus 600 may be used for an end user equipment UE.

As shown in fig. 6, the apparatus 600 may include an obtaining module 610 and a determining module 620. The acquiring module 610 is configured to acquire first configuration information of a direct SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT; the determining module 620 is configured to determine a logical time unit of a second RAT according to the first configuration information and the second configuration information.

According to the direct connection communication device provided by the present disclosure, a UE may obtain first configuration information of a direct connection SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT; determining a logical time unit of a second RAT according to the first configuration information and the second configuration information. According to the coexistence situation that the two RATs work on the same carrier frequency, the UE determines the logic time unit by considering the configuration information of the two RATs when the two RATs coexist, a basis is provided for the user equipment to use the direct connection link for communication service, and communication interference possibly caused when the two RATs coexist is avoided.

In some embodiments of the present disclosure, based on the embodiment shown in fig. 6, as shown in fig. 7, the apparatus 600 may further include a transceiver module 630, wherein the obtaining module 610 may obtain the first configuration information and the second configuration information by reading pre-configuration data of the UE; or the transceiver module 640 is configured to receive downlink control information sent by a network device, and the obtaining module 610 may obtain the first configuration information and the second configuration information based on the received downlink control information.

In some embodiments of the present disclosure, the determining module 620 is further configured to: determining a time unit in which a SL synchronization resource of the second RAT is located.

In some embodiments of the present disclosure, the determining module 620 is further configured to: determining a second time unit of the second RAT, which is coincident with a first time unit of the first RAT in a time domain, as a time unit in which an SL synchronization resource of the second RAT is located.

In some embodiments of the present disclosure, the determining module 620 is further configured to: determining a first time unit reserved by the first RAT and not carrying out SL communication according to first configuration information; determining a second time unit of the second RAT, which is coincident with the first time unit in a time domain, as a time unit in which a SL synchronization resource of the second RAT is located.

In some embodiments of the present disclosure, the determining module 620 is further configured to: and determining a second RAT logical time unit from the physical time unit of the time unit in which the SL synchronization resource of the second RAT is removed according to the first configuration information and the second configuration information.

In some embodiments of the present disclosure, the determining module 620 is further configured to: determining a logical time unit of the second RAT from physical time units excluding a time unit in which a SL synchronization resource of the second RAT is located and a time unit in which a SL synchronization resource of the first RAT is located according to the first configuration information and the second configuration information.

Therefore, according to the direct connection communication apparatus provided by the present disclosure, the UE may obtain first configuration information of a direct connection SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT, determine a synchronization time unit first, and then determine a logical time unit of the second RAT according to the first configuration information and the second configuration information. According to the coexistence situation that the two RATs work on the same carrier frequency, the UE determines the logic time unit by considering the configuration information of the two RATs when the two RATs coexist, a basis is provided for the user equipment to use the direct connection link for communication service, and communication interference possibly caused when the two RATs coexist is avoided. The embodiment provides an optional mode for determining the synchronization time unit, and expands the boundary for determining the logic time unit when two RATs coexist, so that communication interference possibly caused by coexistence of the two RATs is avoided in a more flexible configuration mode.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a communication device 800 according to an embodiment of the present disclosure. The communication apparatus 800 may be a network device, a user device, a chip system, a processor, or the like supporting the network device to implement the method described above, or a chip, a chip system, a processor, or the like supporting the user device to implement the method described above. The apparatus may be configured to implement the method described in the method embodiment, and refer to the description in the method embodiment.

The communication device 800 may include one or more processors 801. The processor 801 may be a general purpose processor, a special purpose processor, or the like. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal device chip, a DU or CU, etc.), execute a computer program, and process data of the computer program.

Optionally, the communication apparatus 800 may further include one or more memories 802, on which a computer program 804 may be stored, and the processor 801 executes the computer program 804, so as to enable the communication apparatus 800 to execute the method described in the above method embodiments. Optionally, the memory 802 may also store data. The communication device 800 and the memory 802 may be provided separately or may be integrated together.

Optionally, the communication device 800 may further include a transceiver 805, an antenna 806. The transceiver 805 may be referred to as a transceiving unit, a transceiver, or a transceiving circuit, etc. for implementing transceiving functions. The transceiver 805 may include a receiver and a transmitter, and the receiver may be referred to as a receiver or a receiving circuit, etc. for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmission circuit, etc. for implementing the transmission function.

Optionally, one or more interface circuits 807 may also be included in the communication device 800. The interface circuit 807 is used to receive code instructions and transmit them to the processor 801. The processor 801 executes the code instructions to cause the communication apparatus 800 to perform the methods described in the above method embodiments.

In one implementation, the processor 801 may include a transceiver to perform receive and transmit functions. The transceiver may be, for example, a transceiver circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In one implementation, the processor 801 may have a computer program 803 stored therein, and the computer program 803 running on the processor 801 may cause the communication apparatus 800 to perform the method described in the above method embodiments. The computer program 803 may be solidified in the processor 801, in which case the processor 801 may be implemented in hardware.

In one implementation, the communication device 800 may include a circuit that may implement the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described herein may be implemented on Integrated Circuits (ICs), analog ICs, radio Frequency Integrated Circuits (RFICs), mixed signal ICs, application Specific Integrated Circuits (ASICs), printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), bipolar Junction Transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication apparatus in the above description of the embodiment may be a network device or a user equipment, but the scope of the communication apparatus described in the present application is not limited thereto, and the structure of the communication apparatus may not be limited by the drawings. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication means may be:

(1) A stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) A set of one or more ICs, which optionally may also include storage means for storing data, computer programs;

(3) An ASIC, such as a Modem (Modem);

(4) A module that may be embedded within other devices;

(5) Receivers, terminal devices, smart terminal devices, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like;

(6) Others, and so forth.

For the case that the communication device may be a chip or a system of chips, see the schematic structural diagram of the chip shown in fig. 9. The chip shown in fig. 9 comprises a processor 901 and an interface 902. The number of the processors 901 may be one or more, and the number of the interfaces 902 may be more.

Optionally, the chip further comprises a memory 903, the memory 903 being used for storing necessary computer programs and data.

Those skilled in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the present application may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

The present application also provides a readable storage medium having stored thereon instructions which, when executed by a computer, implement the functionality of any of the above-described method embodiments.

The present application also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program is loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will understand that: the various numbers of the first, second, etc. mentioned in this application are only used for the convenience of description and are not used to limit the scope of the embodiments of this application, but also to indicate the sequence.

At least one of the present applications may also be described as one or more, and a plurality may be two, three, four or more, and the present application is not limited thereto. In the embodiment of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the like, and the technical features described in "first", "second", "third", "a", "B", "C", and "D" are not in a sequential order or a size order.

As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus, and/or device (e.g., magnetic discs, optical disks, memory, programmable Logic Devices (PLDs)) used to provide machine instructions and/or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal used to provide machine instructions and/or data to a programmable processor.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the Internet.

The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.

It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present disclosure may be executed in parallel or sequentially or in different orders, and are not limited herein as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved.

In addition, it is to be understood that various embodiments of the present application may be implemented alone or in combination with other embodiments as the solution allows.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

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

Claims

1. A method for direct communication, the method being performed by a User Equipment (UE), the method comprising:

acquiring first configuration information of a direct connection SL synchronization resource of a first Radio Access Technology (RAT) on a first carrier and second configuration information of a SL synchronization resource of a second RAT;

determining a logical time unit of a second RAT according to the first configuration information and the second configuration information.

2. The method of claim 1, wherein the first RAT is Long Term Evolution (LTE) and the second RAT is New air interface (NR) technology.

3. The method of claim 1 or 2, wherein the obtaining first configuration information of a direct SL synchronization resource of a first Radio Access Technology (RAT) and second configuration information of a SL synchronization resource of a second RAT on a first carrier comprises:

reading the pre-configuration data of the UE to acquire the first configuration information and the second configuration information; or

And receiving downlink control information sent by network equipment to acquire the first configuration information and the second configuration information.

4. The method according to any one of claims 1 to 3, further comprising:

determining a time unit in which a SL synchronization resource of the second RAT is located.

5. The method of claim 4, wherein the determining a time unit in which the synchronization resource of the second RAT is located comprises:

determining a second time unit of the second RAT, which is coincident with a first time unit of the first RAT in a time domain, as a time unit in which an SL synchronization resource of the second RAT is located.

6. The method of claim 4, wherein the determining a time unit in which the synchronization resource of the second RAT is located comprises:

determining a first time unit reserved by the first RAT and not used for SL communication according to first configuration information;

determining a second time unit of the second RAT, which is coincident with the first time unit in a time domain, as a time unit in which a SL synchronization resource of the second RAT is located.

7. The method of any of claims 4-6, wherein the determining a logical time unit of a second RAT according to the first configuration information and the second configuration information comprises:

and determining a second RAT logical time unit from the physical time unit of the time unit in which the SL synchronization resource of the second RAT is positioned according to the first configuration information and the second configuration information.

8. The method of claim 1, wherein the determining a logical time unit of a second RAT according to the first configuration information and the second configuration information comprises:

determining a logical time unit of the second RAT from physical time units excluding a time unit in which an SL synchronization resource of the second RAT is located and a time unit in which an SL synchronization resource of the first RAT is located according to the first configuration information and the second configuration information.

9. A direct communication device, the device comprising:

an obtaining module, configured to obtain first configuration information of a direct SL synchronization resource of a first radio access technology RAT on a first carrier and second configuration information of a SL synchronization resource of a second RAT;

a determining module, configured to determine a logical time unit of a second RAT according to the first configuration information and the second configuration information.

10. A communication device, comprising: a transceiver; a memory; a processor, coupled to the transceiver and the memory, respectively, configured to control the transceiver to transceive wireless signals by executing computer-executable instructions on the memory, and capable of implementing the method of any one of claims 1-8.

11. A computer storage medium, wherein the computer storage medium stores computer-executable instructions; the computer-executable instructions, when executed by a processor, are capable of implementing the method of any one of claims 1-8.