WO2024031716A1

WO2024031716A1 - Sidelink communication method and apparatus

Info

Publication number: WO2024031716A1
Application number: PCT/CN2022/112317
Authority: WO
Inventors: 赵群
Original assignee: 北京小米移动软件有限公司
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2024-02-15
Also published as: CN115516998A

Abstract

The present disclosure relates to the field of communications. Provided are a sidelink (SL) communication method and apparatus. The method comprises: a user equipment (UE) acquiring first configuration information of a sidelink (SL) synchronization resource of a first radio access technology (RAT) and second configuration information of an SL synchronization resource of a second RAT, which are on a first carrier; and determining a logical time unit of the second RAT according to the first configuration information and the second configuration information. With regard to the coexistence situation in which two RATs operate over the same carrier frequency, the present disclosure takes both RATs into consideration in determining a logical time unit, so as to provide a basis for a UE to perform a communication service using an SL, thereby preventing the communication interference that may be caused when the two RATs coexist.

Description

A direct connection communication method and device

Technical field

The present disclosure relates to the field of mobile communication technology, and in particular to a direct communication method and device.

Background technique

With the continuous evolution of communication technology, more and more users have mobile devices or Internet of Things (IoT) devices. Mobile network communication technologies such as Sidelink (SL) provide opportunities for many application scenarios. The technical support of the Internet of Things and the continuous emergence of a new generation of new Internet applications have put forward higher requirements for wireless communication technology. In the current application of SL technology, only one radio access technology (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 yet been solved.

Contents of the invention

The present disclosure proposes a direct connection communication method and device, provides a solution for the terminal user equipment UE to simultaneously consider the configuration information of two RATs to determine the logical time unit when two RATs coexist, and uses a direct connection link for the user equipment. Communication services provide the basis to avoid possible communication interference when two RATs coexist.

A first aspect embodiment of the present disclosure provides a direct-connect communication method, which is executed by an end user equipment UE. The method includes: obtaining a third direct-connect SL synchronization resource of a first radio access technology RAT on a first carrier. Configuration information and second configuration information of the SL synchronization resource of the second RAT; determining a logical time unit of the second RAT based on the first configuration information and the second configuration information.

In some embodiments of the present disclosure, the first RAT is Long Term Evolution technology LTE, and the second RAT is New Radio NR technology.

In some embodiments of the present disclosure, obtaining the first configuration information of the directly connected SL synchronization resource of the first radio access technology RAT on the first carrier and the second configuration information of the SL synchronization resource of the second RAT includes: Read the preconfiguration data of the UE to obtain the first configuration information and the second configuration information; or receive 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 includes: determining a time unit in which the SL synchronization resource of the second RAT is located.

In some embodiments of the present disclosure, determining the time unit in which the synchronization resource of the second RAT is located includes: coincident with the first time unit in which the SL synchronization resource of the first RAT is located in the time domain. The second time unit of the second RAT is determined as the time unit in which the SL synchronization resource of the second RAT is located.

In some embodiments of the present disclosure, determining the time unit in which the synchronization resource of the second RAT is located includes: determining, according to the first configuration information, the first time unit reserved by the first RAT without SL communication. Time unit: determine the second time unit of the second RAT that coincides with the first time unit in the time domain as the time unit in which the SL synchronization resource of the second RAT is located.

In some embodiments of the present disclosure, determining the logical time unit of the second RAT based on the first configuration information and the second configuration information includes: based on the first configuration information and the second configuration information, The second RAT logical time unit is determined from the physical time unit excluding the time unit in which the SL synchronization resource of the second RAT is located.

In some embodiments of the present disclosure, determining the logical time unit of the second RAT based on the first configuration information and the second configuration information includes: based on the first configuration information and the second configuration information, The logical time unit of the second RAT is determined from the physical time unit excluding the time unit where the SL synchronization resource of the second RAT is located and the time unit where the SL synchronization resource of the first RAT is located.

A second aspect embodiment of the present disclosure provides a direct-connect communication device, which includes an acquisition module configured to acquire the first configuration information of the direct-connect SL synchronization resource of the first radio access technology RAT on the first carrier and second configuration information of the SL synchronization resource of the second RAT; a determining module configured to determine the logical time unit of the second RAT according to the first configuration information and the second configuration information.

A third embodiment of the present disclosure provides a communication device, which includes: a transceiver; a memory; and a processor, respectively connected to the transceiver and the memory, configured to execute a computer program on the memory. Execute instructions to control the wireless signal transmission and reception of the transceiver, and can implement the method described in the embodiment of the first aspect of the present disclosure.

A fourth embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by a processor, the implementation of the first aspect of the disclosure can be implemented The method described in the example.

In summary, according to the direct communication method and device proposed in this disclosure, the UE can obtain the first configuration information of the direct SL synchronization resource of the first radio access technology RAT on the first carrier and the SL synchronization resource of the second RAT. Second configuration information: determine the logical time unit of the second RAT according to the first configuration information and the second configuration information. This disclosure is aimed at the coexistence situation of two RATs working on the same carrier frequency. When the two RATs coexist, the UE simultaneously considers the configuration information of the two RATs to determine the logical time unit, providing user equipment with communication services using direct links. foundation to avoid possible communication interference caused by the coexistence of two RATs.

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.

Description of drawings

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

Figure 1 is a schematic diagram of a method for determining a logical time unit according to an embodiment of the present disclosure;

Figure 2 is a schematic flowchart of a direct connection communication method according to an embodiment of the present disclosure;

Figure 3 is a schematic flowchart of a direct communication method according to an embodiment of the present disclosure;

Figure 4 is a schematic diagram of a method for determining a synchronization time unit according to an embodiment of the present disclosure;

Figure 5 is a schematic diagram of a method for determining a logical time unit according to an embodiment of the present disclosure;

Figure 6 is a block diagram of a direct-connect communication device according to an embodiment of the present disclosure;

Figure 7 is a block diagram of a direct-connect communication device according to an embodiment of the present disclosure;

Figure 8 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a chip provided by an embodiment of the present disclosure.

Detailed ways

Embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present disclosure and are not to be construed as limitations of the present disclosure.

With the rapid development of mobile communication technology, Internet of Things technology has become an inevitable trend in the development of future communication networks. Direct-connect communication technology with more user-friendly performance is based on the 3rd Generation Partnership Project (3GPP) standard. The above came into being. The continuous emergence of a new generation of new Internet applications (such as vehicle to everything (V2X)) has put forward higher requirements for wireless communication technology, driving the continuous evolution of wireless communication technology to meet application needs.

In order to better support Internet of Vehicles communications, during the transition process between the third generation (Third Generation, 3G) and the fourth generation (Fourth Generation, 4G) mobile communication technology, the Long Term Evolution (LTE) version LTE V2X was formulated in 14 (LTE Release 14) to support communication between Internet of Vehicles devices (such as vehicles and vehicles, vehicles and people, vehicles and roadside nodes) through direct links (Sidelink, SL). In the subsequent version 15 (Release15), the LTE V2X technology was enhanced to support functions such as carrier aggregation. In the fifth generation of mobile communication technology (Fifth Generation, 5G), after the Release15 version of 5G New Radio (NR) technology was formulated, 3GPP started the work of using NR interface to support Internet of Vehicles communications, and completed 5G in Release16 SL supports direct communication between Internet of Vehicles devices through NR technology. Due to the different physical layer designs of LTE and NR, direct communication between LTE V2X and NR V2X devices is not possible.

In addition, since the replacement time of vehicles is relatively long, it is necessary to consider the coexistence issue between the Internet of Vehicles equipment that supports LTE V2X and the Internet of Vehicles equipment that supports NR V2X. In Release16, only the situation where LTE V2X and NR V2X work on different carrier frequencies is considered. In the recent 3GPP Release 18 discussion, the coexistence of LTE V2X and NR V2X working on the same carrier frequency was discussed, and it was proposed that the two V2X technologies could dynamically share time-frequency resources on the same carrier frequency. Since LTE V2X is a first-mover system, improvements to NR V2X should be considered to support shared spectrum resources.

In related technologies, in order to support the transmission and reception of SL synchronization signals, both NR and LTE need to configure SL synchronization time-frequency resources. The SL resource pools used by NR and LTE SL communications are defined in their respective logical time units. LTE is a logical subframe and NR is a logical slot, so the logical time needs to be determined. unit.

However, in one application scenario, when the UE supports two RATs, for example, the UE supports both LTE SL technology and NR SL technology, when direct communication is performed between UEs, for example, through LTE communication technology and When other UEs that support LTE SL technology communicate, or communicate with other UEs that support NR SL technology through NR communication technology, if the respective RATs only remove the time units of their respective SL synchronization signals or broadcast channels, the two determined The logical time unit of the RAT will vary. For example, the synchronization time unit of LTE SL may belong to the logical time unit of NR SL, and vice versa. Since the SL resource pool is defined on a logical unit, it may cause the LTE SL resource pool to include NR synchronization time units, or the NR SL resource pool to include LTE synchronization time units, causing unnecessary interference. Therefore, it is necessary to consider both RATs at the same time to determine the logical time unit to avoid problems such as communication performance degradation caused by possible conflicts between the two RATs in different application scenarios.

To this end, the present disclosure proposes a direct connection communication method and device, providing a solution for the terminal user equipment UE to simultaneously consider the configuration information of two RATs to determine the logical time unit when two RATs coexist, and provide direct connection for the user equipment. The link provides a basis for communication services to avoid possible communication interference when two RATs coexist.

The direct communication method and device provided by this application will be introduced in detail below with reference to the accompanying drawings.

Before introducing the detailed implementation of the present disclosure, a method of determining a logical time unit in a scenario of communication using direct communication technology is introduced. As shown in Figure 1, Figure 1 shows a schematic diagram of the determination method of logical time units in direct communication.

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

The time unit in which the time-frequency resources of the SL are insufficient may be, for example, a time unit used for downlink transmission. For another example, in a Time Division Duplexing (TDD) network, the OFDM symbols of the time slot can be divided into downlink, flexible or uplink, and the time units in which the uplink time-frequency resources are insufficient to support SL communication will also be removed. .

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

In order to solve the above problem, the following describes how the UE determines the logical time unit when two RATs coexist on the same carrier at the same time with reference to Figures 2-5.

Figure 2 shows a schematic flow chart of a direct connection communication method, which can be executed by an end user equipment (User Equipment, UE). In this disclosure, user equipment UE includes but is not limited to intelligent terminal equipment, cellular phones, wireless devices, handsets, mobile units, vehicles, vehicle-mounted equipment, etc.

In embodiments of the present disclosure, the solution provided by the present disclosure can be used in the fifth generation mobile communication technology (Fifth Generation, 5G) and its subsequent communication technologies, such as the fifth generation mobile communication technology evolution (5G-advanced), the sixth generation mobile communication technology Generation mobile communication technology (Sixth Generation, 6G), etc., are not limited in this disclosure.

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

S201. Obtain first configuration information of directly connected SL synchronization resources of the first radio access technology RAT on the first carrier and second configuration information of SL synchronization resources of the second RAT.

In embodiments of the present disclosure, the configuration information may be resource pool configuration information of the UE. Specifically, the configuration information includes the first configuration information of the first sidelink (SL) synchronization resource of the first radio access technology (Radio Access Technology, RAT) on the first carrier, and the first configuration information of the second RAT Second configuration information of the second SL synchronization resource.

In embodiments of the present disclosure, the first RAT may be a 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 New Radio (NR) technology, and the second SL synchronization resource of the second RAT may be NR SL synchronization resource.

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

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

It should be understood that the UE can 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, that is, the NR SL resource pool. In addition, the present disclosure does not limit whether a UE is a receiving UE or a sending UE. It should be understood that for direct communication between UEs, the configuration of the UE is aligned between the receiving UE and the sending UE.

In addition, the way for the UE to obtain the first configuration information or the second configuration information may be to obtain it from the preconfiguration of the UE, for example, to obtain the configuration information by reading the preconfiguration data stored in the UE chip. Alternatively, in some embodiments of the present disclosure, the way for the UE to obtain the first configuration information or the second configuration information may be to receive downlink control information sent by the network device and obtain the configuration data from the downlink control information. This disclosure does not limit the way in which the UE obtains configuration information.

In 5G application scenarios, the above-mentioned network equipment can be a 5G radio access network (NG-RAN) node, such as gNB or ng-eNB, where gNB can be used for independent networking and ng-eNB can be used for downward It is compatible with 4G networks to adapt to the application requirements of different core networks. Its specific use cases depend on the application scenarios and are not limited here.

S202: Determine the logical time unit of the second RAT according to the first configuration information and the second configuration information.

It can be understood that in the related technology, the logical time unit is the time remaining after removing the time units used by the respective RATs to transmit SL synchronization signals and broadcast channels, the time units with insufficient time-frequency resources of the SL, and the reserved time units. unit. In other words, for any RAT, among all physical time units, after removing the time units used to transmit SL synchronization signals and broadcast channels, time units with insufficient SL time-frequency resources, and reserved time units, the remaining The physical time unit is used as a logical time unit for transmitting communication information.

For example, the logical time unit of LTE is the remaining time unit after removing the time unit used by LTE to transmit SL synchronization signals and broadcast channels, the time unit with insufficient time and frequency resources of SL, and the reserved time unit; the logical time unit of NR It is the remaining time unit after removing the time unit used by NR to transmit SL synchronization signals and broadcast channels, the time unit with insufficient time-frequency resources of SL, and the reserved time unit. In other words, each RAT determines the logical time unit of each RAT. .

However, for the case where the UE supports both LTE SL and NR SL, when two RATs coexist on the same carrier at the same time, if the respective RATs only remove their respective SL synchronization signals or broadcast channel time units, the logic of the two RATs obtained after determination Time units will vary. For example, the synchronization time unit of LTE SL may belong to the logical time unit of NR SL, and vice versa. Since the SL resource pool is defined on a logical unit, it may cause the LTE SL resource pool to include NR synchronization time units, or the NR SL resource pool to include LTE synchronization time units, causing unnecessary interference.

Therefore, in the embodiment of the present disclosure, the configuration situations of two RATs are considered to determine the logical time unit of NR.

In other words, in the embodiment of the present disclosure, the UE determines the logical time unit of NR based on the first configuration information of LTE and the second configuration information of NR. Compared with the existing technology, the configuration of two RATs is considered.

It should be understood that the time unit described in the embodiment of the present disclosure may include a slot, a subframe, a frame, a subslot, an OFDM symbol, etc. In the present disclosure No restrictions.

In summary, according to the direct communication method provided by the present disclosure, the UE can obtain the first configuration information of the direct SL synchronization resource of the first radio access technology RAT on the first carrier and the second configuration information of the SL synchronization resource of the second RAT. Configuration information: determining a logical time unit of the second RAT according to the first configuration information and the second configuration information. This disclosure is aimed at the coexistence situation of two RATs working on the same carrier frequency. When the two RATs coexist, the UE simultaneously considers the configuration information of the two RATs to determine the logical time unit, providing user equipment with communication services using direct links. foundation to avoid possible communication interference caused by the coexistence of two RATs.

Based on the embodiment shown in Figure 2, Figure 3 shows a schematic flowchart of a direct communication method according to an embodiment of the present disclosure. This method can be performed by the UE. As shown in Figure 3, the method may include the following steps:

S301. Obtain first configuration information of directly connected SL synchronization resources of the first radio access technology RAT on the first carrier and second configuration information of SL synchronization resources of the second RAT.

Step S301 in this embodiment has the same principle as step S201 in the above embodiment. For other corresponding explanations, please refer to S201 and will not be described again.

S302: Determine the time unit in which the SL synchronization resource of the second RAT is located.

In the embodiment of the present disclosure, the main problem solved by the present disclosure is that when LTE SL and NR SL coexist on the same carrier, both RATs are considered for the determination of the logical time unit to avoid determining the logical time unit by each RAT. The resulting situation is that the resource pool of LTE SL contains NR synchronization time units, or the resource pool of NR SL includes LTE synchronization time units, causing unnecessary interference.

Since the SL resource pool is defined on a logical unit, the determination of the logical time unit requires removing the time unit where the synchronization resource is located. Therefore, in this embodiment, the method of determining the time unit in which the NR SL synchronization resource is located is focused.

In an optional implementation manner of the present disclosure, determining the time unit where the synchronization resource of the second RAT is located includes: comparing the first time unit where the SL synchronization resource of the first RAT is located in the time domain. The overlapping second time unit of the second RAT is determined as the time unit in which the SL synchronization resource of the second RAT is located.

In other words, the time unit where the second RAT synchronization resource is located coincides with the time unit where the first RAT synchronization resource is located in the time domain.

Specifically, this can be achieved by frequency division multiplexing (Frequency-division multiplexing, FDM) of the synchronization resources of NR SL and the synchronization resources of LTE SL.

Based on the above description, as an example, as shown in Figure 4, Figure 4 shows an example of a method for determining a time unit of an NR SL synchronization resource. Among them, for example, when the sub-carrier space (SCS) of NR SL is 15KHz, the time length of one time unit (slot) of NR SL is the same as the time length of one time unit (subframe) of LTE SL. time lengths are equal. Assume that subframe n in LTE SL is configured as the time unit where the resources of the LTE SL synchronization signal/broadcast channel are transmitted; for NR SL that coexists on the same carrier, slot m that coincides with subframe n in the time domain can be configured as the transmission NR The time unit in which the resources of the SL synchronization signal/broadcast channel are located. Since the periods of a set of synchronization resources of NR SL and LTE SL are equal (160ms), a set of synchronization resources of the two RATs can be completely configured on time and frequency resources that overlap in the time domain. Therefore, when determining the NR logical time unit, This part of the time unit used for transmitting synchronization signals or broadcast channel synchronization resources is removed to avoid the situation where the logical time units of the two RATs are different.

For another example, when the sub-carrier space (SCS) of NR SL is 30KHz, the time length of one time unit (slot) of NR SL and the time length of one time unit (subframe) of LTE SL It is a twice relationship, that is, the length of one LTE subframe is equal to the length of two NR slots. Assume that subframe n in LTE SL is configured as the time unit where the resources for transmitting LTE SL synchronization signals/broadcast channels are located; for NR SL coexisting on the same carrier, two slot m that overlap with subframe n in the time domain can be configured as The time unit in which the resources for transmitting NR SL synchronization signals/broadcast channels are located. The synchronization resources of the two RATs can be completely configured on the time and frequency resources with overlapping time domains, and a set of LTE synchronization resources and two sets of NR synchronization resources are configured on the time units with overlapping time domains, so that when determining the NR logical time unit, This part of the time unit used for transmitting synchronization signals or broadcast channel synchronization resources is removed to avoid the situation where the logical time units of the two RATs are different.

The frequency domain position of the synchronization resources of LTE SL in the subframe is not adjustable. It is located on 6 Physical Resource Blocks (PRB) centered on the center frequency position of the carrier, while the synchronization resources of NR SL are The frequency domain position can be set through configuration (or preconfiguration). Therefore, the frequency domain location of the NR SL synchronization resource can be configured to a location that does not coincide with the frequency domain of the LTE SL synchronization resource.

It should be understood that in this embodiment, other types of time units (such as reserved time units or insufficient time units) that need to be removed to determine the logical time unit remain unchanged and can be the same as the existing technology, and will not be described again here. .

In another optional implementation of the present disclosure, determining the time unit in which the synchronization resource of the second RAT is located includes: determining, according to the first configuration information, the time unit reserved by the first RAT without SL communication. The first time unit: determine the second time unit of the second RAT that coincides with the first time unit in the time domain as the time unit in which the SL synchronization resource of the second RAT is located.

Specifically, as described in Figure 1, since in the process of determining the logical time unit, it is necessary to remove the synchronization time unit, reserved time unit, and insufficient time unit from the physical time unit to obtain the logical time unit, therefore, in the configuration When transmitting the NR time unit of the synchronization resource, the time unit of the NR used for transmitting the synchronization resource may also be configured in a time slot in which subframes reserved by LTE that are not used for transmitting SL resources overlap in the time domain.

In other words, the time unit where the second RAT synchronization resource is located coincides with the time unit reserved by the second RAT for not performing SL communication in the time domain.

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

Therefore, in this embodiment, the NR synchronization resources are set in subframes reserved for LTE, so that the NR synchronization resources will not overlap with the LTE logical subframes in time domain.

S303: Determine the logical time unit of the second RAT according to the first configuration information and the second configuration information.

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

In this embodiment, based on the time unit (synchronization time unit) where the SL synchronization resources of NR are located determined in step S302, these synchronization time units are removed from the physical time unit, and in the remaining time units, the NR logical time is determined unit. The NR synchronization time unit may be an NR time unit (time slot) that coincides with the time unit (subframe) where the LTE SL synchronization resource is located in the time domain as described in the above embodiment, or may be an NR time unit (time slot) that coincides with the time unit (subframe) where the LTE SL synchronization resource is located. The reserved time unit (subframe) for which SL communication is not performed coincides with the NR time unit (time slot) in the time domain.

In short, from the physical time unit in 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 implementation of the present disclosure, determining the logical time unit of the second RAT based on the first configuration information and the second configuration information may further include: based on the first configuration information and the third configuration information. Second configuration information, determining the logical time of the second RAT from the physical time unit excluding the time unit where the SL synchronization resource of the second RAT is located and the time unit where the SL synchronization resource of the first RAT is located. unit.

As shown in Figure 5, Figure 5 shows another determination scheme of logical time units. When determining the NR logical time unit, the time unit where the LTE SL synchronization resources are located (LTE synchronization subframe) and the time unit where the NR SL synchronization resources are located (NR synchronization slot) can be removed, and in the remaining physical time In the unit, for example, 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 summary, according to the direct communication method provided by the present disclosure, the UE can obtain the first configuration information of the direct SL synchronization resource of the first radio access technology RAT on the first carrier and the second configuration information of the SL synchronization resource of the second RAT. Configuration information: first determine the synchronization time unit, and then determine the logical time unit of the second RAT based on the first configuration information and the second configuration information. This disclosure is aimed at the coexistence situation of two RATs working on the same carrier frequency. When the two RATs coexist, the UE simultaneously considers the configuration information of the two RATs to determine the logical time unit, providing user equipment with communication services using direct links. foundation to avoid possible communication interference caused by the coexistence of two RATs. This embodiment provides an optional method of determining the synchronization time unit, expands the boundary of determining the logical time unit when two RATs coexist, and uses a more flexible configuration method to avoid communication interference that may be caused when two RATs coexist.

It should be understood that the purpose of the solution provided by the above embodiments of the present disclosure is that when NR SL and LTE SL share the same carrier, when determining the logical time unit of NR SL, it is necessary to remove those resources synchronized with LTE SL The time slot in which the time domain overlap occurs in the subframe. This can avoid time synchronization between the NR SL resource pool configured on the NR SL logical time slot and the synchronization signal of the LTE SL.

In addition, the "determining the logical time unit" in the embodiments described in FIGS. 1 to 5 may specifically refer to determining the index of the logical time unit, and the "removing XXX time unit from the physical time unit" described above may specifically refer to Refers to the index that removes the time unit, which will not be described in detail in this disclosure. For its specific implementation, please refer to relevant standards.

Therefore, when NR SL and LTE SL coexist on the same carrier, embodiments of the present disclosure frequency-division multiplex the synchronization resources of the two RATs, or remove synchronization with the LTE SL when the NR determines the NR SL logical time slot. Methods such as time slots where resources occur in overlapping time domains solve the problem that the resource pool of LTE SL includes NR synchronization time units, or the resource pool of NR SL includes LTE synchronization time units that may result from considering a single RAT alone to determine the logical time unit. This avoids Eliminates the occurrence of unnecessary interference during SL communication.

In the above-mentioned embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspective of user equipment. In order to implement each function in the method provided by the above embodiments of the present application, the user equipment may include a hardware structure and a software module to implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. A certain function among the above functions can be executed by a hardware structure, a software module, or a hardware structure plus a software module.

Corresponding to the direct connection communication methods provided by the above embodiments, the present disclosure also provides a direct connection communication device, because the direct connection communication device provided by the embodiments of the present disclosure is consistent with the direct connection communication methods provided by the above embodiments. Correspondingly, therefore, the implementation of the direct connection communication method is also applicable to the direct connection communication device provided in this embodiment, and will not be described in detail in this embodiment.

FIG. 6 is a schematic structural diagram of a direct connection communication device 600 provided by an embodiment of the present disclosure. The direct connection communication device 600 can be used for end user equipment UE.

As shown in FIG. 6 , the device 600 may include an obtaining module 610 and a determining module 620 . The obtaining module 610 is used to obtain the first configuration information of the directly connected SL synchronization resources of the first radio access technology RAT on the first carrier and the second configuration information of the SL synchronization resources of the second RAT; the determining module 620 is used to obtain The logical time unit of the second RAT is determined according to the first configuration information and the second configuration information.

According to the direct communication device provided by the present disclosure, the UE can obtain the first configuration information of the direct SL synchronization resources of the first radio access technology RAT on the first carrier and the second configuration information of the SL synchronization resources of the second RAT; The logical time unit of the second RAT is determined according to the first configuration information and the second configuration information. This disclosure is aimed at the coexistence situation of two RATs working on the same carrier frequency. When the two RATs coexist, the UE simultaneously considers the configuration information of the two RATs to determine the logical time unit, providing user equipment with communication services using direct links. foundation to avoid possible communication interference caused by the coexistence of two RATs.

In some embodiments of the present disclosure, based on the embodiment shown in FIG. 6, as shown in FIG. 7, the device 600 may also include a transceiver module 630, wherein the acquisition module 610 may read the preconfiguration data of the UE. Obtain the first configuration information and the second configuration information; or the transceiver module 640 is configured to receive downlink control information sent by the network device, and the acquisition module 610 can acquire the first configuration information and the second configuration information based on the received downlink control information. Describe the second configuration information.

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

In some embodiments of the present disclosure, the determining module 620 is further configured to: determine the second time unit of the second RAT that coincides with the first time unit where the SL synchronization resource of the first RAT is located in the time domain. , determined as the time unit in which the SL synchronization resource of the second RAT is located.

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

In some embodiments of the present disclosure, the determining module 620 is further configured to: remove the physical time of the time unit where the SL synchronization resource of the second RAT is located according to the first configuration information and the second configuration information. unit, determine the second RAT logical time unit.

In some embodiments of the present disclosure, the determining module 620 is further configured to: remove the time unit where the SL synchronization resource of the second RAT is located and the time unit based on the first configuration information and the second configuration information. The logical time unit of the second RAT is determined in the physical time unit of the time unit where the SL synchronization resource of the first RAT is located.

Therefore, according to the direct communication device provided by the present disclosure, the UE can obtain the first configuration information of the direct SL synchronization resources of the first radio access technology RAT on the first carrier and the second configuration of the SL synchronization resources of the second RAT. information, first determine the synchronization time unit, and then determine the logical time unit of the second RAT based on the first configuration information and the second configuration information. This disclosure is aimed at the coexistence situation of two RATs working on the same carrier frequency. When the two RATs coexist, the UE simultaneously considers the configuration information of the two RATs to determine the logical time unit, providing user equipment with communication services using direct links. foundation to avoid possible communication interference caused by the coexistence of two RATs. This embodiment provides an optional method of determining the synchronization time unit, expands the boundary of determining the logical time unit when two RATs coexist, and uses a more flexible configuration method to avoid communication interference that may be caused when two RATs coexist.

Please refer to FIG. 8 , which is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application. The communication device 800 may be a network device, a user equipment, a chip, a chip system, or a processor that supports network equipment to implement the above method, or a chip, a chip system, or a processor that supports user equipment to implement the above method. Processor etc. The device can be used to implement the method described in the above method embodiment. For details, please refer to the description in the above method embodiment.

Communication device 800 may include one or more processors 801. The processor 801 may be a general-purpose processor or a special-purpose processor, or the like. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data. The central processor can be used to control communication devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs. , processing data for computer programs.

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

Optionally, the communication device 800 may also include a transceiver 805 and an antenna 806. The transceiver 805 may be called a transceiver unit, a transceiver, a transceiver circuit, etc., and is used to implement transceiver functions. The transceiver 805 may include a receiver and a transmitter. The receiver may be called a receiver or a receiving circuit, etc., used to implement the receiving function; the transmitter may be called a transmitter, a transmitting circuit, etc., used to implement the transmitting function.

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

In one implementation, the processor 801 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits used to implement the receiving and transmitting functions can be separate or integrated together. The above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing codes/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.

In one implementation, the processor 801 may store a computer program 803, and the computer program 803 runs on the processor 801, causing the communication device 800 to perform the method described in the above method embodiment. The computer program 803 may be solidified in the processor 801, in which case the processor 801 may be implemented by hardware.

In one implementation, the communication device 800 may include a circuit, and the circuit may implement the functions of sending or receiving or communicating in the foregoing method embodiments. The processor and transceiver described in this application can be implemented in integrated circuits (ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board (PCB), electronic equipment, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiments may be a network device or user equipment, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited by the figures. The communication device may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) Independent integrated circuit IC, or chip, or chip system or subsystem;

(2) A collection of one or more ICs. Optionally, the IC collection may also include storage components for storing data and computer programs;

(3)ASIC, such as modem;

(4) Modules that can be embedded in other devices;

(5) Receivers, terminal equipment, intelligent terminal equipment, cellular phones, wireless equipment, handheld devices, mobile units, vehicle-mounted equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.;

(6) Others, etc.

For the case where the communication device may be a chip or a chip system, refer to the schematic structural diagram of the chip shown in FIG. 9 . The chip shown in Figure 9 includes a processor 901 and an interface 902. The number of processors 901 may be one or more, and the number of interfaces 902 may be multiple.

Optionally, the chip also includes a memory 903, which is used to store necessary computer programs and data.

Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and overall system design requirements. Those skilled in the art can use various methods to implement the functions for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present application.

This application also provides a readable storage medium on which instructions are stored. When the instructions are executed by a computer, the functions of any of the above method embodiments are implemented.

This application also provides a computer program product, which, when executed by a computer, implements the functions of any of the above method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer programs. When a computer program is loaded and executed on a computer, processes or functions according to embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer program may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program may be transmitted from a website, computer, server or data center via a wireline (e.g. Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center. Computer-readable storage media can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or other integrated media that contains one or more available media. Available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., high-density digital video discs (DVD)), or semiconductor media (e.g., solid state disks (SSD)) )wait.

Persons of ordinary skill in the art can understand that the first, second, and other numerical numbers involved in this application are only for convenience of description and are not used to limit the scope of the embodiments of this application and also indicate the order.

At least one in this application can also be described as one or more, and the plurality can be two, three, four or more, which is not limited by this application. In the embodiment of this application, for a technical feature, the technical feature is distinguished by "first", "second", "third", "A", "B", "C" and "D", etc. The technical features described in "first", "second", "third", "A", "B", "C" and "D" are in no particular order or order.

As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus, and/or means for providing machine instructions and/or data to a programmable processor ( For example, magnetic disks, optical disks, memories, programmable logic devices (PLD)), including machine-readable media that receive machine instructions as machine-readable signals. 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 herein may be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., A user's computer having a graphical user interface or web browser through which the user can interact with implementations of the systems and technologies described herein), or including such backend components, middleware components, or any combination of front-end components in a computing system. The components of the system may be interconnected by any form or medium of digital data communication (eg, a communications network). Examples of communication networks include: local area network (LAN), wide area network (WAN), and the Internet.

Computer systems may include clients and servers. Clients and servers are generally remote from each other and typically interact over a communications network. The relationship of client and server is created by computer programs running on corresponding computers and having a client-server relationship with each other.

It should be understood that various forms of the process shown above may be used, with steps reordered, added or deleted. For example, each step described in the present disclosure can be executed in parallel, sequentially, or in a different order. As long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, there is no limitation here.

In addition, it should be understood that various embodiments of the present application can be implemented alone or in combination with other embodiments if the scheme allows.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, and all of them should be covered. within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A direct connection communication method, characterized in that the method is executed by user equipment UE, and the method includes:

Obtain first configuration information of directly connected SL synchronization resources of the first radio access technology RAT on the first carrier and second configuration information of SL synchronization resources of the second RAT;

The logical time unit of the second RAT is determined according to the first configuration information and the second configuration information.
The method of claim 1, wherein the first RAT is Long Term Evolution (LTE) technology, and the second RAT is New Radio (NR) technology.
The method according to claim 1 or 2, characterized in that said obtaining the first configuration information of the directly connected SL synchronization resources of the first radio access technology RAT on the first carrier and the SL synchronization resources of the second RAT. The second configuration information includes:

Read the preconfiguration data of the UE to obtain the first configuration information and the second configuration information; or

Receive downlink control information sent by a network device to obtain the first configuration information and the second configuration information.
The method according to any one of claims 1 to 3, characterized in that the method further includes:

Determine the time unit in which the SL synchronization resource of the second RAT is located.
The method according to claim 4, wherein determining the time unit in which the synchronization resource of the second RAT is located includes:

The second time unit of the second RAT that coincides with the first time unit where the SL synchronization resource of the first RAT is located in the time domain is determined as the time where the SL synchronization resource of the second RAT is located. unit.
The method according to claim 4, wherein determining the time unit in which the synchronization resource of the second RAT is located includes:

Determine a first time unit reserved by the first RAT for not performing SL communication according to the first configuration information;

The second time unit of the second RAT that coincides with the first time unit in the time domain is determined as the time unit in which the SL synchronization resource of the second RAT is located.
The method according to any one of claims 4 to 6, wherein determining the logical time unit of the second RAT according to the first configuration information and the second configuration information includes:

According to the first configuration information and the second configuration information, the second RAT logical time unit is determined from the physical time unit excluding the time unit in which the SL synchronization resource of the second RAT is located.
The method of claim 1, wherein determining the logical time unit of the second RAT based on the first configuration information and the second configuration information includes:

According to the first configuration information and the second configuration information, the physical time unit is removed from the time unit where the SL synchronization resource of the second RAT is located and the time unit where the SL synchronization resource of the first RAT is located. , determine the logical time unit of the second RAT.
A direct connection communication device, characterized in that the device includes:

An acquisition module configured to acquire the first configuration information of the directly connected SL synchronization resources of the first radio access technology RAT on the first carrier and the second configuration information of the SL synchronization resources of the second RAT;

Determining module, configured to determine the logical time unit of the second RAT according to the first configuration information and the second configuration information.
A communication device, which includes: a transceiver; a memory; and a processor, respectively connected to the transceiver and the memory, and configured to control the wireless operation of the transceiver by executing computer-executable instructions on the memory. Transmit and receive signals, and can implement the method described in any one of claims 1-8.
A computer storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by a processor, the method described in any one of claims 1-8 can be implemented.