CN113068147A

CN113068147A - Method and system for supporting resource multiplexing in sidelink communication

Info

Publication number: CN113068147A
Application number: CN202110361240.4A
Authority: CN
Inventors: 郑建勇
Original assignee: Shanghai Zhongxing Yilian Communication Co ltd
Current assignee: Shanghai Zhongxing Yilian Communication Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-07-02
Anticipated expiration: 2041-04-02
Also published as: CN113068147B

Abstract

The invention has described a method and system used for supporting resource multiplexing in sidelink communication, while having the business of sidelink to send the demand, request sidelink resources to the base transceiver station; receiving scheduling resources distributed by a base station based on comprehensive evaluation service requirements; performing data transmission on frequency domain resources issued by a base station; when the common resource sending requirement is met, performing combined power control according to sidelink related channel resources; and carrying out data transmission according to the power obtained by the joint power control calculation. By calculating the total power of the common channel and the sidelink channel and reducing the transmitting power of the channel with lower priority, the resource allocation mode of common multiplexing on the time-frequency resource is realized, and the system meets the optimization of power consumption and efficiency. The invention provides a novel mixed slot frame structure, so that the novel mixed slot frame structure meets the coverage requirements of different scenes of a common link and a sidelink link. And by designing the transmission delay control, the frame structure is adaptively switched according to the delay, so that the demodulation performance and the link stability are ensured.

Description

Method and system for supporting resource multiplexing in sidelink communication

Technical Field

The present invention relates to the field of mobile communication technologies, and in particular, to a method and a system for supporting resource multiplexing in sidelink communication.

Background

With the development of the mobile internet, more and more devices are connected to the mobile network, and new services and applications emerge endlessly. The explosion of mobile data traffic will present a serious challenge to the network. To meet the increasing demand of mobile traffic, a fifth Generation (5th Generation, 5G) mobile communication network has been developed. The data transmission rate of the 5G network is faster than the wired internet, 100 times faster than the previous 4G LTE cellular network, and has a lower network delay. At present, 5G has obvious application achievements in the fields of car networking, automatic driving, remote surgery and the like.

The number of wireless connections worldwide is undergoing a continuous high-speed increase, and various new wireless service types, such as internet of things, automatic driving, etc., are emerging in large numbers, which all put higher demands on the 5G wireless communication system.

Technologies of vehicle to anything communication (V2X), device-to-device (D2D), vehicle to vehicle (V2V) communication, vehicle to pedestrian (V2P) communication, or vehicle to infrastructure/network (V2I/N) communication are defined in the 5G communication system, and V2V, V2P, and V2I/N are collectively referred to as V2X, which are technologies of direct communication between terminal devices (terminal devices).

In the communication V2X scenario, the 5G system employs sidelink (side link) technology for direct communication between terminals. Since the communication between the terminal and the communication between the terminal and the base station may exist simultaneously, a distinction needs to be made to prevent the mutual interference between the two. The sidelink resource currently used is distinguished from a normal NR (New Radio, referred to as a New air interface) resource by a slot. However, when the sidelink service does not occupy the whole slot resource, the resource is wasted, and the resource utilization rate is still low.

Therefore, it is desirable to provide a method and system for supporting resource reuse in sidelink communications to improve the overall resource utilization of the system.

Disclosure of Invention

In order to solve the above problems, the present invention provides a method and a system for supporting resource multiplexing in sidelink communication, which perform joint power control on each channel corresponding to a transmission resource on a hybrid timeslot, provide a novel hybrid frame structure, design transmission delay control, perform frame structure adaptive switching according to delay, and implement sidelink resource multiplexing on a frequency domain resource, thereby effectively improving the overall resource utilization rate of the system and simultaneously ensuring demodulation performance and link stability.

To achieve the above object, the present invention provides a method for supporting resource multiplexing in sidelink communication, comprising the following steps:

s1: when a sidelink service transmission requirement exists, requesting sidelink resources from a base station;

s2: receiving scheduling resources distributed by a base station based on comprehensive evaluation service requirements;

s3: performing data transmission on frequency domain resources issued by a base station;

s4: when the common resource sending requirement is met, performing combined power control according to sidelink related channel resources;

s5: and carrying out data transmission according to the power obtained by the joint power control calculation.

Optionally, the scheduling resource in step S2 indicates the type of the corresponding slot through a bitmap, and indicates whether the slot is used for sidelink communication.

Optionally, the base station indicates, through the control message, the corresponding sidelink frequency domain resource set on the hybrid slot, each sub-channel is scheduled in units of resource block groups RBG, and a frequency domain interval is added between the common sub-channel and the sidelink sub-channel as a guard band.

Optionally, the joint power control may determine the transmission power of the corresponding channel by performing comprehensive estimation according to a path loss between the terminal and the base station, a path loss between the terminal and another terminal, and a target power of the corresponding channel.

Optionally, the joint power control comprises:

calculating the total power P1 of the corresponding common channel according to the path loss of the common channel and the target power;

calculating the total power P2 of the sidelink channel according to the pathloss of the sidelink channel and the target power;

the sum of the total power value of the ordinary channel and the sidelink channel is P1+ P2;

if the sum P of the total power values is larger than the maximum transmission Pmax of the terminal, entering a power limited condition;

distributing the transmitting power according to the priority of each channel;

and then carrying out data transmission by using the power value of each channel obtained by allocation.

Optionally, the transmission power is allocated according to the priority of each channel, and for the channel with lower priority, the corresponding transmission power is reduced, so that P < ═ Pmax.

Optionally, if there is a requirement for sending common resources on the hybrid slot, the timing advance TA for sending information on the hybrid slot uses the timing advance TA corresponding to the common resource channel;

if the hybrid slot does not have the requirement of sending the common resource, the TA of.

Optionally, the frame structure of the hybrid slot includes: for the sidelink synchronization slot, the first symbol is PSBCH; for sidelink common slot type1, the first symbol uses the GAP.

Optionally, for the sidelink receiving end, a time offset timing offset is obtained through initial synchronization, and a value range of the initial synchronization timing offset is as follows: -Max _ int _ timing;

when timing offset is less than 0, the PSBCH will remove the resource of the first symbol during demodulation;

after the initial synchronization, data demodulation is performed according to the initial timing offset, and the accurate timing offset is estimated through the demodulation reference signal DMRS, and the estimation result is accumulated into the historical timing offset.

Optionally, if timing offset > TH1, reporting a message to the base station, and requesting the sidelink slot to use a type0 format; if timing offset is less than TH2, reporting a message to a base station, requesting the sidelink slot to use a type1 format, and adding a protection GAP; wherein TH1 is the first threshold, TH2 is the second threshold less than TH 1.

In addition, the present invention also provides a system for supporting resource reuse in sidelink communication, including:

the system comprises a sidelink service unit, a base station and a control unit, wherein the sidelink service unit is used for sending a sidelink service requirement, requesting a sidelink resource to the base station, receiving a scheduling resource distributed by the base station based on a comprehensive evaluation service requirement, performing data transmission on a frequency domain resource issued by the base station, and/or receiving a signal of the control unit to perform data transmission;

the common resource service unit is used for sending common resources and receiving signals of the control unit for data transmission;

a control unit, configured to perform joint power control according to sidelink-related channel resources when there is a need for sending common resources, and allocate powers obtained by joint power control calculation to the sidelink service unit and the common resource service unit respectively for data transmission;

the control unit comprehensively evaluates and determines the transmitting power of the corresponding channel according to the path loss between the terminal and the base station, the path loss between the terminal and the other terminal and the target power of the corresponding channel.

In addition, the present invention also provides an electronic device including:

a memory for storing a computer program;

a processor for executing the computer program stored in the memory, and when the computer program is executed, implementing the method described above.

The invention has the advantages and beneficial effects that: compared with the existing mode of carrying out direct communication between terminals by adopting sidelink technology, the invention provides a method and a system for supporting resource multiplexing in sidelink communication, which realize the following technical effects:

1. when the common resource transmission requirement exists, the joint power control is carried out on each channel corresponding to the transmission resource on the mixed time slot by calculating the total power of the common channel and the sidelink channel and reducing the transmission power of the channel with lower priority, so that the effectiveness of the resource utilization of the whole system is improved.

2. And the transmitting terminal transmits the data by using the TA corresponding to the NR common resource on the corresponding mixed time slot, so that a resource allocation mode of common multiplexing on the time-frequency resource is realized, and the system meets the optimization of power consumption and efficiency.

3. A novel mixed slot frame structure is provided, so that the frame structure meets the coverage requirements of different scenes of a common link and a sidelink link.

4. A sidelink receiving end time offset estimation and self-adaptive slot format switching mechanism is provided, and frame structure self-adaptive switching is carried out according to time delay by designing transmission time delay control, so that the performance of the receiving end and the stability of a link are ensured.

Drawings

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

Fig. 1 schematically illustrates an application scenario diagram of a method and a system for supporting resource multiplexing in sidelink communication in an embodiment;

fig. 2 schematically illustrates a bitmap structure diagram in a method and a system for supporting resource multiplexing in sidelink communication in an embodiment;

fig. 3 schematically illustrates a flowchart of a method for supporting resource multiplexing in sidelink communication and joint power control in a system in an embodiment;

FIG. 4 schematically illustrates a frame structure of a novel hybrid slot in an embodiment;

fig. 5 schematically illustrates another application scenario diagram in the method and system for supporting resource multiplexing in sidelink communication in an embodiment;

fig. 6 schematically illustrates a flowchart of a slot format switching mechanism in a method and a system for supporting resource multiplexing in sidelink communication in an embodiment;

fig. 7 schematically shows a structural diagram of a system for supporting resource multiplexing in sidelink communication in an embodiment.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In an embodiment, the present invention provides a method for supporting resource reuse in sidelink communication, which is applied to a 5G communication system, preferably a 5G internet of vehicles (not limited). As shown in fig. 1, in an application scenario of the method, V2V communication can be directly performed between the vehicle terminal 101 and the vehicle terminal 102, and the vehicle and the base station 100 can also perform communication directly. The method comprises the following steps:

In this embodiment, when the vehicular terminal 101 has a sidelink service requirement with another terminal 102, a sidelink resource is requested from the base station 100, and the base station 100 comprehensively evaluates the service requirement and allocates a scheduling resource to the corresponding terminal 101. The terminal 101 receives scheduling resources allocated by the base station 100 based on the comprehensive evaluation service demand, and then performs data transmission on frequency domain resources issued by the base station.

In an embodiment, the scheduling resource in step S2 indicates the type of the corresponding slot through a bitmap, and indicates whether the slot is used for sidelink communication. For example, if 5 numbers of 1, 3,7, 2, and 5 need to be stored, under normal circumstances, 5 × 4 — 20 bytes are needed, but bitmap only needs 1byte, and the final string after superposition is: 01110101. in this embodiment, as shown in fig. 2, the base station 100 indicates the type of the corresponding slot through a bitmap, and each bit corresponds to one slot. The embodiment is not limited to the length of the bitmap sequence, the sequence may be periodic or aperiodic, if the bit is 1, it indicates that the slot is used for sidelink communication; if the bit is 0, it indicates that the slot cannot be used for sidelink communication. The bitmap shown in fig. 2 is 10101010, where a bit (bit) of 1 indicates that the corresponding slot may be used for sidelink communications.

In an embodiment, as shown in fig. 2, the base station 100 indicates, through the control message, that the hybrid slot corresponds to the sidelink frequency domain resource set, each sub-channel is scheduled by using the resource block group RBG as a unit, and a frequency domain interval is added between the normal sub-channel and the sidelink sub-channel as a guard band. Wherein, a Resource Block Group (RBG) is a Resource unit for service channel Resource allocation, and is used for Resource allocation and reducing control channel overhead, and the frequency domain may be divided into: {2, 4, 8, 16} RBs. RB (Resource Blocks) is a minimum unit of Resource allocation. One RB is defined as the number of symbols (14) × 12 subcarriers contained in one Slot. Each RBG is indicated using 1-bit information, where information 1 indicates scheduling and 0 indicates no scheduling. In this embodiment, one RBG is composed of 8 RBs (not limited). The terminal 101 performs data transmission on the frequency domain resource issued by the base station 100, as shown in fig. 2, the frequency domain resource has a common (normal) sub-channel and a sidelink sub-channel, and a frequency domain interval, such as 2RB (not limited to), is added between the normal sub-channel and the sidelink sub-channel as a guard band to reduce the influence of interference between signals on performance.

In an embodiment, joint power control determines the transmission power of the corresponding channel by comprehensive evaluation based on the path loss between the terminal 101 and the base station 100 and the path loss between the terminal 101 and the other terminal 102 and the target power of the corresponding channel. When the terminal 101 has common resources such as pusch (physical uplink shared channel), pucch (physical uplink control channel), srs (sounding reference channel), or prach (physical random access channel) on the hybrid slot to be transmitted, the sidelink-related channel resources are considered to perform joint power control, so as to ensure that power utilization between the common channel and the sidelink channel is optimized, and the power control determines the transmission power of the corresponding channel through comprehensive evaluation according to the path loss between the terminal and the base station 100, the path loss between the terminal and the terminal 102, and the target power of the corresponding channel.

In one embodiment, as shown in fig. 3, the joint power control in the method includes the following steps:

distributing the transmitting power according to the priority of each channel;

The sequence of the steps for calculating the total power P1 and P2 is not counted, and the sequence of the steps is only used as an example.

And the corresponding transmitting power is reduced for the channels with lower priorities, so that P < ═ Pmax is achieved. For example, if the sidelink channel priority is low, the sidelink channel transmit power is reduced, so that P < ═ Pmax.

In an embodiment, if there is a requirement for sending common resources (pusch/pucch/srs/prach) on a mixed slot, a Timing Advance (TA) for sending information on the mixed slot uses a timing advance corresponding to a common resource channel;

and if the mixed slot does not have the requirement of sending the common resource, the time advance timing advance of the information sent on the mixed slot uses the historical time advance timing advance corresponding to the common resource channel.

In one embodiment, as shown in fig. 4, the method provides a novel frame structure of hybrid slot, which includes: for the sidelink synchronization slot, the first symbol is PSBCH (Physical sidelink broadcast CHannel); for sidelink common slot type1, the first symbol uses the GAP. In a Normal CP (general cyclic prefix) frame structure, one slot includes PSBCH, PSSS, DMRS, SSSS, and GAP. In an Extended CP (Extended cyclic prefix) frame structure, one slot includes PSBCH, PSSS, DMRS, SSSS, GAP. And the normal slot includes a type0 pssch (Physical sidelink shared channel) slot and a type1 pssch slot, where the first symbol of type1 uses a GAP. This is to ensure that the frame header of the data received by the terminal 102 is not lost when the distance from the terminal 101 to the terminal 102 is greater than the distance from the terminal 101 to the base station 100. The novel mixed slot frame structure can meet the coverage requirements of different scenes of a common link and a sidelink link.

In an embodiment, as shown in fig. 6, for the sidelink receiving end, the initial synchronization obtains the timing offset (time offset), and the value range of the initial synchronization timing offset is-Max _ int _ timing. That is, the receiving terminal 102 searches for and acquires the synchronization signal transmitted by the transmitting terminal 101. As shown in fig. 5, since the timing advance of the terminal 101 may be greater than the distance delay between the terminal 101 and the terminal 102, and the timing offset may be negative, the initial synchronization timing offset ranges from-Max _ int _ timing to Max _ int _ timing. In the present embodiment, Max _ inti _ timing is 4096Ts, but is not limited to this value.

after the initial synchronization, the terminal 102 demodulates data according to the initial timing offset, and estimates a precise timing offset through the DMRS, and the estimation result is accumulated in the historical timing offset for maintenance. That is, as shown in fig. 6, time offset compensation is performed by the historical timing offset value, accurate time offset estimation is performed using DMRS, and the result is accumulated into the historical timing offset.

If the timing offset is greater than TH1, reporting a message to the base station, and requesting the sidelink slot to use the type0 format, so as to improve the utilization rate of system resources;

if the timing offset is less than TH2, reporting a message to the base station, requesting the sidelink slot to use the type1 format, and adding a protection GAP to prevent the data from being intercepted and influencing the normal demodulation of the signal. Wherein TH1 is the first threshold, TH2 is the second threshold less than TH 1.

The specific process is shown in fig. 6, for example, TH1 may be set to 144Ts, and TH2 may be set to 32Ts, but is not limited to this value. For example, if the timing offset is greater than 144Ts, the terminal 102 reports a message to the base station 100, and suggests that the slot of the sidelink link of the terminal 101 uses a type0 frame structure format, thereby improving the utilization rate of system resources;

if the timing offset is less than 32Ts, the terminal 102 reports a message to the base station 100, and suggests that the slot of the sidelink link of the terminal 101 uses a type1 frame structure format, and a protection GAP is added to prevent the data from being intercepted to influence the normal demodulation of the signal. Therefore, a self-adaptive slot format switching mechanism is realized, so that the base station 100 configures the corresponding slot format for the terminal 101, and the stability of the link is ensured.

In addition, in an embodiment, a system for supporting resource reuse in sidelink communication is further provided, and is used for a 5G communication system, preferably a 5G internet of vehicles as an example. As shown in fig. 1, in an application scenario of the system, V2V communication can be directly performed between the vehicle terminal 101 and the vehicle terminal 102, and the vehicle and the base station 100 can also perform communication directly. As shown in fig. 7, the system includes:

a sidelink service unit 1011, configured to send a sidelink service requirement, request a sidelink resource from the base station, receive a scheduling resource allocated by the base station based on the comprehensive evaluation service requirement, perform data transmission on a frequency domain resource issued by the base station, and/or receive a signal of the control unit to perform data transmission;

a common resource service unit 1012 for transmitting common resources and receiving signals of the control unit

Data transmission;

a control unit 1013, configured to perform joint power control according to sidelink-related channel resources when there is a need for sending common resources, and allocate powers obtained by joint power control calculation to the sidelink service unit 1011 and the common resource service unit 1012 respectively for data transmission;

among them, control unit 1013 determines the transmission power of a corresponding channel by comprehensive evaluation based on the path loss between terminal 101 and base station 100 and the path loss between terminal 101 and another terminal 102 and the target power of the corresponding channel.

In this embodiment, the system implements the following steps through sidelink service unit 1011, common resource service unit 1012 and control unit 1013:

s1: when there is a sidelink service transmission requirement, the sidelink service unit 1011 requests a sidelink resource from the base station 100;

s2: the sidelink service unit 1011 receives scheduling resources allocated by the base station 100 based on the comprehensive evaluation service requirement;

s3: the sidelink service unit 1011 performs data transmission on the frequency domain resource issued by the base station 100;

s4: when there is a need for sending common resources, the control unit 1013 performs joint power control according to sidelink-related channel resources;

s5: the sidelink service unit 1011 and the common resource service unit 1012 respectively perform data transmission according to the powers obtained by the joint power control calculation.

In an embodiment, the scheduling resource allocated by the base station 100 indicates the type of the corresponding slot through a bitmap, and indicates whether the slot is used for sidelink communication. For example, if 5 numbers of 1, 3,7, 2, and 5 need to be stored, under normal circumstances, 5 × 4 — 20 bytes are needed, but bitmap only needs 1byte, and the final string after superposition is: 01110101. in this embodiment, as shown in fig. 2, the base station 100 indicates the type of the corresponding slot through a bitmap, and each bit corresponds to one slot. The embodiment is not limited to the length of the bitmap sequence, the sequence may be periodic or aperiodic, if the bit is 1, it indicates that the slot is used for sidelink communication; if the bit is 0, it indicates that the slot cannot be used for sidelink communication. The bitmap shown in fig. 2 is 10101010, where a bit (bit) of 1 indicates that the corresponding slot may be used for sidelink communications.

In an embodiment, control unit 1013 determines the transmission power of a corresponding channel by comprehensive evaluation based on the path loss between terminal 101 and base station 100 and the path loss between terminal 101 and another terminal 102 and the target power of the corresponding channel. When the terminal 101 has common resources such as pusch (physical uplink shared channel), pucch (physical uplink control channel), srs (sounding reference channel), or prach (physical random access channel) to transmit in the hybrid slot, the sidelink-related channel resources are considered to perform joint power control, so as to ensure optimal power utilization between the common channel and the sidelink channel. Power control section 1013 determines the transmission power of the corresponding channel by comprehensive estimation based on the path loss between terminal 101 and base station 100, the path loss between terminal 102, and the target power of the corresponding channel.

In an embodiment, as shown in fig. 3, the control unit 1013 implements the following steps:

distributing the transmitting power according to the priority of each channel;

then, the sidelink service unit 1011 and the ordinary resource service unit 1012 perform data transmission with the allocated power values of the channels, respectively.

Control unit 1013 allocates transmission power according to the priority of each channel, and reduces the corresponding transmission power for the channel with the lower priority, so that P < ═ Pmax. For example, if the sidelink channel priority is low, the sidelink channel transmit power is reduced, so that P < ═ Pmax.

In an embodiment, if there is a requirement for sending a common resource (pusch/pucch/srs/prach) on a hybrid slot, a Timing Advance (TA) for sending information on the hybrid slot uses a timing advance corresponding to a common resource channel;

In one embodiment, as shown in fig. 4, the present system provides a novel frame structure of a hybrid slot, which includes: for the sidelink synchronization slot, the first symbol is PSBCH; for sidelink common slot type1, the first symbol uses the GAP. In a Normal CP (general cyclic prefix) frame structure, one slot includes PSBCH, PSSS, DMRS, SSSS, and GAP. In an Extended CP (Extended cyclic prefix) frame structure, one slot includes PSBCH, PSSS, DMRS, SSSS, GAP. And the normal slot includes a type0 pssch (Physical sidelink shared channel) slot and a type1 pssch slot, where the first symbol of type1 uses a GAP. This is to ensure that the frame header of the data received by the terminal 102 is not lost when the distance from the terminal 101 to the terminal 102 is greater than the distance from the terminal 101 to the base station 100. The novel mixed slot frame structure can meet the coverage requirements of different scenes of a common link and a sidelink link.

In an embodiment, for the sidelink receiving end, the initial synchronization obtains a timing offset (time offset), and the value range of the initial synchronization timing offset is-Max _ inti _ timing. That is, the receiving terminal 102 searches for and acquires the synchronization signal transmitted by the transmitting terminal 101, and estimates an accurate time offset. As shown in fig. 5, since the sending timing advance of the terminal 101 may be greater than the distance delay between the terminal 101 and the terminal 102, and the timing offset may be a negative value, the initial synchronization timing offset ranges from-Max _ int _ timing to Max _ int _ timing. In the present embodiment, Max _ inti _ timing is 4096Ts, but is not limited to this value.

if timing offset is less than 32Ts, the terminal 102 reports a message to the base station 100, and suggests that the slot of the sidelink link of the terminal 101 uses a type1 frame structure format, and a protection GAP is added to prevent data interception from affecting normal demodulation of signals. Therefore, a self-adaptive slot format switching mechanism is realized, so that the base station 100 configures the corresponding slot format for the terminal 101, and the stability of the link is ensured.

Furthermore, in an embodiment, the present invention also provides an electronic device, including:

a memory for storing a computer program;

a processor for executing the computer program stored in the memory, and when the computer program is executed, implementing the above-mentioned method for supporting resource multiplexing in sidelink communication.

The electronic device of this embodiment may be an integrated circuit board, a PC (Personal Computer), or a portable Computer or other electronic device with a processor.

The memory may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) and/or cache memory. The processor executes various functional applications and data processing by executing a computer program stored in the memory, and in particular, the processor may execute the computer program stored in the memory, and when the computer program is executed, at least the following instructions are executed:

Moreover, while the operations of the method of the invention are depicted in the drawings in a particular order, this does not require or imply that the operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.

While the spirit and principles of the invention have been described with reference to the above specific embodiments, it is to be understood that the invention is not limited to the specific embodiments disclosed, nor is the division of the aspects, which is for convenience only as the features in these aspects cannot be combined to advantage. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A method for supporting resource reuse in sidelink communications, comprising the steps of:

2. The method of claim 1, wherein the scheduling resource in step S2 indicates the type of the corresponding slot through a bitmap, and indicates whether the slot is used for sidelink communication.

3. The method as claimed in claim 2, wherein the base station indicates the corresponding sidelink frequency domain resource set on the mixed slot through the control message, each sub-channel is scheduled in units of resource block group RBG, and a frequency domain interval is added between the normal sub-channel and the sidelink sub-channel as a guard band.

4. The method of claim 1, wherein the joint power control determines the transmission power of the corresponding channel by comprehensive evaluation according to a path loss between the terminal and the base station, a path loss between the terminal and another terminal, and a target power of the corresponding channel.

5. Method for supporting resource reuse in sidelink communication according to claim 1 or 4, characterized in that said joint power control comprises the following steps:

settling common channels and total power value sum P-P1 + P2;

distributing the transmitting power according to the priority of each channel;

6. The method of claim 5, wherein the transmission power allocation is performed according to the priority of each channel, and for the channel with lower priority, the corresponding transmission power is reduced such that P < ═ Pmax.

7. The method according to claim 1, wherein if there is a need for transmitting common resources in a hybrid slot, the timing advance TA for transmitting information in the hybrid slot uses the timing advance TA corresponding to the common resource channel;

8. The method of claim 7, wherein the frame structure of the hybrid slot comprises: for the sidelink synchronization slot, the first symbol is PSBCH; for sidelink common slot type1, the first symbol uses the GAP.

9. The method of claim 8, wherein for a sidelink receiving end, the time offset timing is obtained by initial synchronization, and the range of the initial synchronization timing offset is: -Max _ int _ timing;

10. The method of claim 9, wherein if timing offset > TH1, reporting a message to a base station requesting a sidelink slot to use a type0 format; if timing offset is less than TH2, reporting a message to a base station, requesting the sidelink slot to use a type1 format, and adding a protection GAP; wherein TH1 is the first threshold, TH2 is the second threshold less than TH 1.

11. A system for supporting resource reuse in sidelink communications, comprising:

12. An electronic device, comprising:

a memory for storing a computer program;

a processor for executing the computer program stored in the memory, and when executed, implementing the method of any of claims 1-10.