User equipment, base station, and communication thereof

Abstract

User equipment, base stations, and communications thereof are described. A user equipment, UE, configured for sidelink transmission based on base station scheduling is provided, comprising: a receiving unit configured to receive, from a base station, first control information for a sidelink transmission; a circuit configured to determine, based on the received first control information, a shortened time interval to be used in signaling between the UE and the base station for the sidelink transmission; and a transmitting unit configured to transmit, to the base station, second control information using the shortened time interval, wherein the shortened time interval is less than a standard time interval used in signaling between the UE and another UE in the sidelink transmission, and a time offset between the reception of the first control information and the sidelink transmission is configured.

Description

[0001] This application is a divisional application of Chinese invention patent application filed on November 17, 2017, with application number 201780096101.5, entitled "User Equipment, Base Station and Communication Therewith", and filed by Panasonic Corporation (USA). Technical Field

[0002] This technology relates to the field of wireless communication, and more specifically to user equipment (UE) for sidelink transmission based on base station scheduling, base stations for scheduling sidelink transmission for UE, and their communication. Background Technology

[0003] Long Term Evolution (LTE-V2X) for vehicle-to-everything (V2X) employs two modes for resource scheduling / selection: eNB-based scheduling (Mode 3) and UE-autonomous scheduling (Mode 4). In Mode 3, a UE communicates with the eNB for sidelink scheduling before initiating a sidelink transmission to another UE. In Mode 4, a UE can autonomously initiate a sidelink transmission to another UE without eNB involvement. Summary of the Invention

[0004] A non-limiting and exemplary embodiment helps to avoid unnecessary retransmissions and effectively improve communication performance.

[0005] In one general aspect, a user equipment (UE) for sidelink transmission based on base station scheduling is provided, comprising: a receiving unit for receiving first control information from a base station; a determining circuit for determining, based on the received first control information, whether to use a shortened time interval for signaling interaction between the UE and the base station for sidelink transmission; and a sending unit for sending second control information to the base station during signaling interaction using the shortened time interval after the determining circuit determines that the shortened time interval is used for signaling interaction for sidelink transmission, wherein the length of the shortened time interval is less than the length of a standard time interval.

[0006] In another general aspect, a communication method for a user equipment (UE) performing sidelink transmission based on base station scheduling is provided, comprising: receiving first control information from a base station; determining, based on the received first control information, whether to use a shortened time interval for signaling interaction between the UE and the base station for sidelink transmission; and after determining that the shortened time interval is used for signaling interaction for sidelink transmission, sending second control information to the base station during the signaling interaction using the shortened time interval, wherein the length of the shortened time interval is less than the length of a standard time interval.

[0007] In another general aspect, a base station is provided for scheduling sidelink transmissions for a user equipment (UE), comprising: a control information generation unit for generating first control information; and a transmission unit for transmitting the first control information to the UE, wherein transmitting the first control information indicates whether a shortened time interval is used for signaling interaction of sidelink transmissions between the base station and the UE, and wherein the length of the shortened time interval is less than the length of a standard time interval.

[0008] In another general aspect, a communication method is provided for a base station to schedule sidelink transmissions for a user equipment (UE), comprising: generating first control information at the base station; and sending the first control information to the UE to indicate whether a shortened time interval is used for signaling interaction between the base station and the UE for sidelink transmissions, wherein the length of the shortened time interval is less than the length of a standard time interval.

[0009] In another general aspect, a user equipment (UE) is provided for sidelink transmission based on base station scheduling, comprising: a receiving unit for receiving first control information for sidelink transmission from a base station; a circuit for determining a shortened time interval used in signaling for sidelink transmission between the UE and the base station based on the received first control information; and a transmitting unit for transmitting second control information to the base station using the shortened time interval, wherein the shortened time interval is less than a standard time interval used in signaling between the UE and another UE in the sidelink transmission, and configuring a time offset between the reception of the first control information and the sidelink transmission.

[0010] In another general aspect, a communication method for a user equipment (UE) performing sidelink transmission based on base station scheduling is provided, comprising: receiving first control information for sidelink transmission from a base station; determining a shortened time interval used in signaling for sidelink transmission between the UE and the base station based on the received first control information; and sending second control information to the base station using the shortened time interval, wherein the shortened time interval is less than a standard time interval used in signaling between the UE and another UE in the sidelink transmission, and configuring a time offset between the reception of the first control information and the sidelink transmission.

[0011] In another general aspect, a base station for sidelink transmission based on base station scheduling is provided, comprising: a transmitting unit for transmitting first control information for sidelink transmission to a user equipment (UE); and a receiving unit for receiving second control information, the second control information being transmitted from the UE using a shortened time interval determined according to the first control information, wherein the shortened time interval is less than a standard time interval used in signaling between the UE and another UE in the sidelink transmission, and configuring a time offset between the reception of the first control information and the sidelink transmission.

[0012] In another general aspect, a communication method for a base station performing sidelink transmission based on base station scheduling is provided, comprising: sending first control information to a user equipment (UE) for the sidelink transmission; and receiving second control information, the second control information being sent from the UE using a shortened time interval determined according to the first control information, wherein the shortened time interval is less than a standard time interval used in signaling between the UE and another UE in the sidelink transmission, and configuring a time offset between the reception of the first control information and the sidelink transmission.

[0013] It should be noted that general or specific embodiments can be implemented as systems, methods, integrated circuits, computer programs, storage media, or any alternative combination thereof.

[0014] Other benefits and advantages of the disclosed embodiments will become apparent from the description and accompanying drawings. Benefits and / or advantages can be individually identified through the various embodiments and features in the description and drawings, and it is not necessary to provide all of these embodiments and features in order to identify one or more such benefits and / or advantages. Attached Figure Description

[0015] Figure 1A-Figure 1B The illustrations provide examples of application scenarios for a communication scheme according to embodiments of the present disclosure.

[0016] Figure 2 A block diagram schematically illustrates an example of a user equipment according to an embodiment of the present disclosure;

[0017] Figure 3A The diagram illustrates signaling interaction between a base station and a user equipment for sidelink transmission using a transmission time interval (TTI) according to an embodiment of the present disclosure.

[0018] Figure 3BThe diagram illustrates signaling interaction between a base station and a user equipment for side link transmission using a shortened transmission time interval (sTTI) according to an embodiment of the present disclosure.

[0019] Figure 4A The diagram illustrates signaling interaction between a base station and a user equipment for sidelink transmission using a transmission time interval (TTI) according to another embodiment of the present disclosure.

[0020] Figure 4B The diagram illustrates signaling interaction between a base station and a user equipment for sidelink transmission using a shortened transmission time interval (sTTI) according to another embodiment of the present disclosure.

[0021] Figure 5A The illustration schematically depicts signaling interaction between a base station and a user equipment for sidelink transmission using time slots according to yet another embodiment of this disclosure;

[0022] Figure 5B The diagram schematically illustrates signaling interaction between a base station and a user equipment for sidelink transmission using mini-slots, according to yet another embodiment of this disclosure.

[0023] Figure 6 A block diagram schematically illustrates an example of a user equipment according to an embodiment of the present disclosure;

[0024] Figure 7 A block diagram schematically illustrates details of a user equipment according to an embodiment of the present invention;

[0025] Figure 8 A block diagram schematically illustrates an example of a base station according to an embodiment of the present disclosure;

[0026] Figure 9 A block diagram schematically illustrates an example of a base station according to an embodiment of the present disclosure;

[0027] Figure 10 A block diagram schematically illustrates details of a base station according to an embodiment of the present invention;

[0028] Figure 11 An example flowchart illustrating the signaling interaction between a user equipment and a base station for sidelink transmission according to an embodiment of the present disclosure is shown schematically.

[0029] Figure 12 A flowchart illustrating a communication method according to an embodiment of the present invention is shown schematically; and

[0030] Figure 13A flowchart illustrating a communication method according to an embodiment of the present invention is shown schematically. Detailed Implementation

[0031] Embodiments relating to communication methods, apparatus, and systems will now be described with reference to the accompanying drawings. It should be understood that the present technology can be implemented in many different forms and in many different orders, and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the present technology to those skilled in the art. In fact, the present technology is intended to cover alternatives, modifications, and equivalents to these embodiments, which are included within the scope and spirit of the technology as defined by the appended claims. Furthermore, numerous specific details are set forth in the following detailed description of the present technology in order to provide a thorough understanding of the present technology. However, it will be apparent to those skilled in the art that the present technology can be practiced without these specific details.

[0032] The sequence of steps and the structure of components of the methods provided herein are for illustrative purposes and not for limitation. For purposes of illustration and description, the following detailed description of the technology is given. It is not intended to be exhaustive or to limit the technology to the precise forms disclosed. Many modifications and variations are possible based on the above teachings. The described embodiments were chosen to best illustrate the principles of the technology and its practical application, thereby enabling others skilled in the art to best utilize the technology in various embodiments with various modifications suitable for the intended particular use. The scope of the technology is intended to be defined by the appended claims.

[0033] For both Mode 3 and Mode 4 in LTE-V2X systems, latency reduction is a key objective to meet certain latency-sensitive traffic requirements based on SA (3GPP 22.886). For example, in some advanced driving scenarios, the maximum end-to-end latency requirement is 3ms or 10ms; in some platoon scenarios, it is 10ms or 20ms; and in some extended sensor scenarios, it is 3ms or 10ms. Therefore, for V2X, reducing latency is desirable.

[0034] Currently, in LTE-V2X systems, for eNB-based mode 3, there are essentially several signaling interaction steps between the user equipment (UE) and the eNB before sidelink transmission (especially in the early stages of transmission).

[0035] Table A below shows these steps and their corresponding delays.

[0036] Table A shows the signaling interaction and corresponding latency.

[0037]

[0038] In Table A above, SR is a scheduling request sent by the UE, and BSR is a buffer unit status report sent by the UE, indicating the amount of data to be sent via the side link.

[0039] Assuming the SR period is 1 to 10 ms, the UE needs an average of 22 TTIs (22 ms) for mode 3 transmission, which is relatively large compared to certain latency requirements in some scenarios.

[0040] Latency reduction was a hotly debated topic prior to 3GPP RAN2, and it remains a persistent issue regardless of V2X. An exemplary proposal for reducing latency was implemented by simplifying the resource scheduling interaction steps, specifically by having the UE initially send a BSR directly instead of an SR. The average latency could then be reduced from 22ms to 14ms. However, meeting latency requirements such as 10ms remains challenging.

[0041] Figure 1A-Figure 1B An example of an application scenario illustrating a communication scheme according to embodiments of this disclosure is shown.

[0042] More specifically, Figure 1A An example of an application scenario for Mode 3 in LTE-V2X is shown. This application scenario includes a base station and multiple user equipment, such as… Figure 1A The first user equipment (UE1) and the second user equipment (UE2) are shown. In mode 3, the base station schedules sidelink transmissions for the UEs. The UEs interact with the base station in a bidirectional mode via uplink and downlink for signaling used for sidelink scheduling, and then communicate with other UEs in a bidirectional mode via the sidelink by sending data (e.g., user data) and signaling to other UEs and / or receiving data (e.g., user data) and signaling from other UEs. Figure 1A The application scenarios shown. Figure 1A The embodiments shown are for illustrative purposes only, and there may be any number of UEs and base stations depending on the requirements of a particular application.

[0043] Figure 1B An example of an application scenario for Mode 4 in LTE-V2X is shown. This application scenario includes a base station and multiple user equipment, such as… Figure 1B The first user equipment (UE1) and the second user equipment (UE2) are shown. In mode 4, the UE autonomously schedules sidelink transmissions and communicates with other UEs via the sidelink. The communication method according to embodiments of this disclosure can be applied to... Figure 1B The application scenarios shown. Figure 1B The embodiments shown are for illustrative purposes only, and there may be any number of UEs and base stations depending on the requirements of a particular application.

[0044] Figure 2 A block diagram of an example of a user equipment 200 according to an embodiment of the present disclosure is shown schematically.

[0045] In one embodiment (e.g., in mode 3), user equipment 200 is used for sidelink transmission based on base station scheduling, and user equipment 200 includes a receiving unit 210, a determining circuit 230, and a transmitting unit 250. In one embodiment, the receiving unit 210 can receive first control information from the base station. The determining circuit 230 can determine, based on the received first control information, whether to use a shortened time interval for signaling interaction between the user equipment and the base station for sidelink transmission. After the determining circuit 230 determines that the shortened time interval is to be used for signaling interaction, the transmitting unit 250 can use the shortened time interval to transmit second control information to the base station during the signaling interaction.

[0046] In one embodiment, the base station can determine which time interval length (shortened or standard) is used for signaling interaction. When using a shortened time interval, the base station can further determine the length of the shortened time interval based on the latency requirements of the communication. In another embodiment, the UE can select which time interval length is used for signaling interaction and report the selected time interval to the base station, and the base station can further determine whether to follow or override the UE's selection, as detailed below.

[0047] In one embodiment, the sidelink transmission uses an uplink carrier. In another embodiment, the sidelink transmission uses a dedicated carrier, such as a sidelink dedicated carrier or an Intelligent Transportation System (ITS) dedicated carrier.

[0048] In one embodiment, UE 200 may be a UE in an LTE-V2X system, in which case the shortened time interval is a shortened transmission time interval (sTTI), which is shorter than the standard time interval, which is the transmission time interval (TTI). In some cases, the sTTI may only be a part of the TTI in terms of OFDM symbols. For example, the sTTI may correspond to at least one OFDM symbol in the TTI. However, this is not a limitation; other lengths of the sTTI are available as long as the length of the sTTI is shorter than the length of the standard time interval. In one embodiment, after determining that the sTTI is used for signaling interaction, UE 200 uses the sTTI to send second control information to the base station during signaling interaction.

[0049] In one embodiment, the configuration for signaling interaction using TTI or sTTI can be explicitly indicated to the UE via Downlink Control Information (DCI) or Radio Resource Control (RRC) signaling. In one embodiment, the first control information includes Radio Resource Control (RRC) signaling, and the RRC signaling can explicitly indicate the use of TTI or sTTI for signaling interaction between the UE and the base station. For example, fields in the RRC signaling can indicate the use of TTI or sTTI for signaling interaction. In another embodiment, the first control information includes Downlink Control Information (DCI), and the DCI can explicitly indicate the use of TTI or sTTI for signaling interaction between the UE and the base station. For example, fields in DCI format can indicate the use of TTI or sTTI for signaling interaction. In yet another embodiment, the first control information includes RRC signaling and DCI, and a combination of RRC and DCI can indicate the use of TTI or sTTI for signaling interaction between the UE and the base station. The determining circuit 230 of UE 200 determines, based on one or more of Radio Resource Control (RRC) signaling and downlink control information, whether to use a shortened time interval (referred to as sTTI in LTE) or a standard time interval (referred to as TTI in LTE) for signaling interaction. This will be combined with... Figure 3A and Figure 3B Detailed description.

[0050] Figure 3A The illustration schematically depicts signaling interaction between a base station and a user equipment for sidelink transmission, indicated by a first control information according to an embodiment of the present disclosure, using TTI.

[0051] Figure 3A The illustrated embodiment is an example of Mode 3 in LTE-V2X. The base station (e.g., eNB) can be a UE (e.g., Figure 2 The UE 200 shown is used for scheduling-side link transmission. Figure 3A As shown in the example, TTI is used for signaling interaction between the eNB and UE 200. If TTI is used, the steps during signaling interaction (such as sending SR, receiving UL clearance, sending BSR, and receiving-side traverse clearance) are performed based on TTI, which is the basic time unit for transmission / reception / processing in LTE-V2X.

[0052] like Figure 3A As shown, the eNB sends to, for example Figure 2 The UE 200 shown transmits first control information. More specifically, as... Figure 3AAs shown in the example, the eNB sends first control information, such as RRC or DCI, or a combination thereof, explicitly indicating that a TTI should be used for signaling interaction at TTI#0. The determining circuit 230 in UE 200 determines whether a TTI or sTTI is used for signaling interaction based on one or more of the Radio Resource Control (RRC) signaling and downlink control information. Figure 3A In the example, circuit 230 determines that the TTI is used for signaling interaction. Then, the transmitting unit 250 of UE 200 uses the TTI to transmit second control information to interact with the eNB, and the TTI is used for signaling interaction between UE 200 and eNB for sidelink transmission.

[0053] like Figure 3A As shown in the example, four TTIs (e.g., TTI#0 to TTI#3) are used for signaling interaction between the UE and the base station via the uplink and downlink to schedule sidelink transmissions. At TTI#4, UE 200 performs a sidelink transmission. Figure 3A This is for illustrative purposes, and the signaling interaction delay is variable depending on the actual application, and UE 200 may perform side link transmissions at other times (e.g., TTI#n, where n is an integer).

[0054] Figure 3B The illustration schematically depicts signaling interaction between a base station and a user equipment for sidelink transmission using a shortened transmission time interval (sTTI) explicitly indicated by first control information, according to an embodiment of the present disclosure.

[0055] Figure 3B The illustrated embodiment is exemplarily used for Mode 3 in LTE-V2X. The base station (e.g., eNB) can be a UE (e.g., Figure 2 The UE 200 shown is used for scheduling-side link transmission. Figure 3B As shown in the example, sTTI is used for signaling interaction between the eNB and UE 200.

[0056] In one embodiment, the eNB sends a signal to the UE (e.g., Figure 2 The UE 200 shown sends the first control information. More specifically, as... Figure 3B As shown in the example, the eNB sends first control information such as RRC or DCI, or a combination thereof, explicitly indicating that sTTI should be used for signaling interaction at sTTI#0. The determining circuit 230 in UE 200 determines whether to use sTTI or TTI for signaling interaction based on one or more of the Radio Resource Control (RRC) signaling and downlink control information. For example, the determining circuit 230 may check the RRC or DCI, and if the RRC or DCI explicitly indicates the use of sTTI, for example, via a field in the RRC or DCI, then it determines that sTTI should be used. Figure 3B In the example, circuit 230 determines that the sTTI is used for signaling interaction. Then, the transmitting unit 250 of UE 200 uses the sTTI to transmit second control information to interact with the eNB, and the sTTI is used for signaling interaction between UE 200 and the eNB for sidelink transmission. Figure 3B As shown in the example, four sTTIs (e.g., sTTI#0 to sTTI#3 corresponding to TTI#0 to TTI#2 if the sTTI is half the length of the TTI) are used for signaling interaction between the UE and the base station via the uplink and downlink to schedule sidelink transmissions. At TTI#2, UE 200 performs a sidelink transmission. Figure 3B For illustrative purposes only, and because signaling interaction delays are variable depending on the actual application, and UE 200 may perform side link transmissions at other times (e.g., TTI#n, where n is an integer).

[0057] like Figure 3B As shown, the length of sTTI is half the length of TTI. That is, when the TTI length is 1ms, the sTTI length is equal to 0.5ms. Compared with using TTI throughout the entire signaling interaction process, the total latency of signaling interaction can be reduced by half. Therefore, the latency of signaling interaction between the UE and the base station is greatly reduced. Although Figure 3B The length of the sTTI shown is half the length of the TTI; that is, the sTTI includes 7 of the 14 OFDM symbols in the TTI, but... Figure 3B The embodiments shown are for illustrative purposes only, and the sTTI length can vary depending on the latency requirements of a particular application.

[0058] Furthermore, different V2X traffic volumes may have different latency requirements. Some traffic volumes require low latency, while others are not latency-sensitive. Therefore, using control information such as RRC, DCI, or combinations thereof to explicitly indicate the TTI length, such as whether to use sTTI and configuring the sTTI length when using it, allows for flexibility to meet different traffic requirements.

[0059] In one embodiment, the DCI (Distributed Control Information) sent by the base station to the UE can implicitly instruct the UE to configure signaling interaction to use TTI (Time-to-Time Interaction) or sTTI (Signaling Transmission Interaction). For UE 200, the determining circuit 230 of UE 200 can determine whether to use TTI or sTTI for signaling interaction based on the control resources of the control information received by UE 200, the size of the DCI, the search space in the UE, or a combination thereof. Details will be discussed in conjunction with... Figure 4A and Figure 4B Please provide an explanation.

[0060] Figure 4AThe illustration schematically depicts signaling interaction between a base station and a user equipment for sidelink transmission using a transmission time interval (TTI) implicitly indicated by sending first control information, according to an embodiment of the present disclosure.

[0061] Figure 4A The illustrated embodiment is exemplarily used for Mode 3 in LTE-V2X. The base station (e.g., eNB) can be a UE (e.g., Figure 2 The UE 200 shown is used for scheduling-side link transmission. Figure 4A As shown, TTI is used for signaling interaction between eNB and UE 200.

[0062] More specifically, such as Figure 4A As shown in the example, the eNB uses a TTI to transmit first control information, such as a DCI, at TTI#0. In one embodiment, the determination circuit 230 in the UE 200 determines whether a TTI or a sTTI is used for signaling interaction based on the received first control information, such as a DCI. For example, when the receiving unit 210 receives a DCI within the control resource specified for the TTI, the determination circuit 230 determines that the TTI is used for signaling interaction. In another embodiment, the determination circuit 230 can determine whether a TTI is used for signaling interaction based on the size of the received DCI. For example, if the size of the received DCI is greater than a predetermined size, the determination circuit 230 determines that the TTI is used for signaling interaction. In another embodiment, the determination circuit 230 can also determine whether a TTI is used for signaling interaction based on a search space (e.g., the location of the search space).

[0063] exist Figure 4A In the example, circuit 230 determines that TTI is used for signaling interaction. For example... Figure 4A As shown in the example, four TTIs (e.g., TTI#0 to TTI#3) are used for signaling interaction between the UE and the base station via the uplink and downlink to schedule sidelink transmissions. After determining that a TTI is used for signaling interaction, the transmitting unit 250 of UE 200 uses the TTI to transmit second control information to interact with the eNB, and the TTI is used for signaling interaction between UE 200 and the eNB for sidelink transmissions. At TTI#4, UE 200 performs a sidelink transmission. Figure 4A For illustrative purposes only, and because signaling interaction delays are variable depending on the actual application, and UE 200 may perform side link transmissions at other times (e.g., TTI#n, where n is an integer).

[0064] Figure 4B The illustration schematically depicts signaling interaction between a base station and a user equipment for sidelink transmission using a shortened transmission time interval (sTTI) implicitly indicated by first control information, according to another embodiment of the present disclosure.

[0065] Figure 4B The illustrated embodiment is exemplarily used for Mode 3 in LTE-V2X. For example... Figure 4B As shown, the base station (e.g., eNB) can be a UE (e.g., Figure 2 The UE 200 shown is used for scheduling side link transmission.

[0066] like Figure 4B As shown in the example, the eNB uses sTTI to transmit first control information (such as DCI) at sTTI#0. The determination circuit 230 in UE200 determines whether to use TTI or sTTI for signaling interaction based on the received first control information (e.g., DCI). For example, when the receiving unit 210 receives a DCI within a control resource specifically designated for sTTI, the determination circuit 230 determines that sTTI is used for signaling interaction. In another embodiment, when the receiving unit receives downlink control information within a control resource shared by both sTTI and TTI, the determination circuit 230 can determine whether to use TTI or sTTI for signaling interaction based on the size of the received DCI. For example, if the size of the received DCI is not greater than a predetermined size, the determination circuit 230 determines that sTTI is used for signaling interaction. In another embodiment, the determination circuit 230 can also determine whether to use TTI or sTTI for signaling interaction based on a search space (e.g., the location of the search space).

[0067] exist Figure 4B In the example, circuit 230 determines that the sTTI is used for signaling interaction. Then, the transmitting unit 250 of UE 200 uses the sTTI to transmit second control information to interact with the eNB, and the sTTI is used for signaling interaction between UE 200 and the eNB for sidelink transmission. Figure 4B As shown in the example, four sTTIs (e.g., sTTI#0 to sTTI#3 corresponding to TTI#0 to TTI#2 if the sTTI is half the length of the TTI) are used for signaling interaction between the UE and the base station via the uplink and downlink to schedule sidelink transmissions. At TTI#2, UE 200 performs a sidelink transmission. Figure 4B For illustrative purposes only, and because signaling interaction delays are variable depending on the actual application, and UE 200 may perform side link transmissions at other times (e.g., TTI#n, where n is an integer).

[0068] like Figure 4B As shown, the length of the sTTI is half the length of the TTI, that is, the sTTI length is equal to 0.5ms. Compared with using TTI throughout the entire signaling interaction process, the total latency of the signaling interaction can be reduced by half. Therefore, the latency of signaling interaction between the UE and the base station can be greatly reduced. Although Figure 4B The length of the sTTI shown is half the length of the TTI; that is, the sTTI includes 7 of the 14 OFDM symbols in the TTI, but... Figure 4B The embodiments shown are for illustrative purposes only, and the length of sTTI can vary depending on the latency requirements of a particular application.

[0069] In addition, by using TTI or sTTI for implicit configuration of signaling interaction, RRC signaling can be avoided, thereby saving communication system resources.

[0070] In practical applications, considering backward compatibility in LTE-V2X, the side link transmission after signaling interaction still uses TTI for communication between different UEs.

[0071] Refer again Figure 2 In one embodiment, UE 200 may be a UE in a new radio system, in which case the shortened time interval is referred to as a time slot (or non-time slot unit) in the new radio system, and the standard time interval is referred to as a time slot in the new radio system, wherein, in relation to OFDM symbols, a time slot or non-time slot unit is part of a time slot. For example, a time slot or non-time slot unit may correspond to at least one OFDM symbol in a time slot. However, this is not limiting, and time slots of other lengths are also available as long as the length of the time slot is shorter than the length of the time slot. After determining that a time slot or non-time slot unit will be used for signaling interaction, UE 200 uses the time slot (or non-time slot unit) to send second control information to the base station (e.g., gNB) during signaling interaction. In addition, since backward compatibility of UEs does not need to be considered in NR, UE 200 may also use the time slot or non-time slot unit to perform sidelink transmissions after determining that a time slot or non-time slot unit will be used for signaling interaction in the new radio system.

[0072] The use of hourly slots or time slot units for signaling interaction can be explicitly or implicitly indicated by the gNB sending control information. The determination circuit 230 of UE 200 determines whether hourly slots or time slots are used for signaling interaction based on the received control information. More specifically, for explicit indications via the transmission of control information that may include RRC, DCI, or a combination thereof, the determination circuit 230 determines whether hourly slots or time slots are used for signaling interaction based on one or more of Radio Resource Control (RRC) signaling and Downlink Control Information (DCI). For implicit indications via the transmission of control information, when the receiving unit 210 receives first control information (e.g., DCI) within control resources specifically designated for a shortened time interval, the determination circuit 230 determines whether hourly slots or non-time slot units are used for signaling interaction. When the receiving unit 210 of UE 200 receives first control information (e.g., DCI) within control resources shared by time slot or non-time slot units and time slots, the determining circuit 230 determines whether the time slot is used for signaling interaction based on one or more of the search space in the user equipment and the size of the downlink control information (DCI).

[0073] Figure 5A The illustration schematically depicts signaling interaction between a base station and a user equipment for sidelink transmission in a new radio (NR) system according to another embodiment of this disclosure, using time slots, referred to as "DMRS type A-based scheduling". Figure 5B The illustration schematically depicts signaling interaction between a base station and a user equipment for sidelink transmission in an NR system using hourly slots according to another embodiment of the present disclosure, referred to as "DMRS type B-based scheduling". Figures 5A-5B and Figures 3A-4B The difference is that, Figures 5A-5B The time slot in the middle corresponds to Figures 3A-4B TTI in Figures 5A-5B The hour gap in the middle corresponds to Figures 3A-4B sTTI in. Figures 5A-5B Operations and Figures 3A-4B The operations shown are similar, so for clarity and brevity, repeated descriptions are omitted here.

[0074] It should be understood that, Figures 3A-5B This is merely an example and for illustrative purposes, not a limitation. Although sidelink transmission uses, as Figures 3A-5B The uplink carrier shown, but Figures 3A-5B The embodiments shown are for illustrative purposes only, and in another embodiment, sidelink transmission may also use a dedicated carrier (e.g., a sidelink dedicated carrier or an intelligent transportation system (ITS) dedicated carrier), and the operation of sidelink transmission using a dedicated carrier is similar to the operation using an uplink carrier. Therefore, for clarity and brevity, repeated descriptions are omitted here.

[0075] Figure 6 A block diagram schematically illustrates an example of a user equipment 600 according to an embodiment of the present disclosure. The user equipment 600 includes a receiving unit 210, a determining circuit 230, a transmitting unit 250, and a selecting circuit 650. The elements and configuration of the receiving unit 210, the determining circuit 230, and the transmitting unit 250 are... Figure 2 The same as shown. Therefore, there is the same as... Figure 2 Elements with similar functions are labeled with the same reference numerals, and for the sake of brevity and clarity, they will not be described again in this document.

[0076] In one embodiment, UE 200 may be a UE in an LTE-V2X system, in which case the shortened time interval is a shortened transmission time interval (sTTI) and the standard time interval is a transmission time interval (TTI). In another embodiment, user equipment 600 may be a UE in a new radio system, in which case the shortened time interval is a time slot (or non-time slot) unit in the new radio system and the standard time interval is a time slot in the new radio system.

[0077] In one embodiment, selection circuit 650 can select a shortened time interval (e.g., sTTI in LTE, and hourly or non-timeslot units in NR) or a standard time interval (e.g., TTI in LTE, and timeslots in NR) for signaling interaction between user equipment 600 and base stations (eNB in ​​LTE and gNB in ​​NR) for sidelink transmission. Furthermore, transmission unit 250 transmits a report indicating the selected time interval for signaling interaction via one or more of a scheduling request (SR) and a buffer unit status report (BSR).

[0078] In one embodiment, UE 600 uses a Reporting Message (SR) (via its content or transport resources) to report a recommended or selected time interval, specifying whether a shortened or standard time interval will be used for signaling interaction. In one embodiment, depending on the resources used to send the SR, the SR includes a regular SR and a sidelink SR. The sidelink SR also includes SRs for standard time intervals and SRs for shortened time intervals. If UE 600 chooses to use a shortened time interval for signaling interaction, UE 600's transmitting unit 250 can use a sidelink SR for the shortened time interval to send a report. For the base station, the base station receives the report and obtains the selected time interval based on the received SR. For example, when the base station determines that an SR has been received within the control resources specified for the sidelink SR and that the SR is also for a shortened time interval, the base station confirms that UE 650 has selected a shortened time interval for signaling interaction in sidelink transmissions.

[0079] The base station can further decide whether to use the selected shortened time interval for signaling interaction. When deciding to use the selected shortened time interval, the base station (eNB / gNB) sends a DCI or RRC to the UE 600 to indicate whether the shortened time interval should be used for signaling interaction.

[0080] In another embodiment, UE 600 uses a BSR (via its content or transport resources) to report a recommended or selected time interval length, indicating whether a shortened or standard time interval will be used for signaling interaction. In one embodiment, depending on the resources used to send the BSR, the BSR includes a regular BSR and a sidelink BSR. The sidelink BSR further includes a BSR for the standard time interval and a BSR for the shortened time interval. If UE 600 chooses to use a shortened time interval for signaling interaction, UE 600's sending unit 250 can send a report using the sidelink BSR for the shortened time interval. For the base station, the base station receives the report and obtains the selected time interval length based on the received BSR. For example, when the base station determines that a BSR has been received within the control resources specified for the sidelink and the BSR is further for a shortened time interval, the base station confirms that UE 600 has selected a shortened time interval.

[0081] In another embodiment, the UE 600 can also select the length of the shortened time interval by configuring the BSR and sending the BSR to the base station. The base station can then determine the recommended length of the shortened time interval based on the resources and content of the received BSR.

[0082] The base station can further decide whether to use the selected shortened time interval. Furthermore, the base station (eNB / gNB) sends control information to the UE600, indicating whether to use the shortened time interval or the standard time interval for signaling interaction. The UE600 can then determine whether to use the shortened time interval for signaling interaction based on the determination scheme described above.

[0083] In another embodiment, the base station may send control information (such as DCI format 5A in LTE) or sidelink scheduling assignment (PSCCH or PSBCH) indicating which TTI length is used for sidelink transmission. In particular, the sidelink scheduling assignment-based method can be used for both Mode 3 (eNB-based sidelink transmission) in LTE and Mode 4, in which the UE autonomously schedules.

[0084] In one embodiment, the first control information sent by the base station includes downlink control information (DCI) related to the sidelink, for example, a DCI sent by the base station after receiving the BSR from the UE. The time at which the user equipment sends the sidelink transmission is no earlier than a first time determined according to one of the following formulas a) and b):

[0085]

[0086]

[0087] in, This indicates the time at which the base station transmits DCI related to the sidelink, where m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the user equipment capacity and are configured by RRC or predetermined.

[0088] Figure 7 A block diagram schematically illustrates details of a user equipment 700 according to an embodiment of the present invention. Figure 7 As shown, UE 700 includes a decoding unit 710, a demodulation unit 720, a resource demapping unit 730, a resource demultiplexing unit 740, a first signal processing unit 750, a second signal processing unit 760, a processing circuit 780 including an encoding unit 782, a modulation unit 784, a resource mapping unit 786, and a resource multiplexing unit 788, a receiving unit 210, a control circuit 770 including a determining circuit 230 and a selecting circuit 650, and a transmitting unit 250. The components and configuration of the receiving unit 210, the determining circuit 230, and the transmitting unit 250 are similar to those of the UE 700. Figure 2 The same as shown. Therefore, having the same Figure 2 Components with similar functions shown are labeled with the same reference numerals; and for the sake of brevity and clarity, they will not be described again in this document.

[0089] In one embodiment, UE 700 can be a UE in an LTE-V2X system, in which case the shortened time interval is the shortened transmission time interval (sTTI), and the standard time interval is the transmission time interval (TTI). For OFDM symbols, sTTI is a part of the TTI. Signaling interactions between UE 700 and a base station (e.g., eNB) can utilize sTTI.

[0090] In another embodiment, UE 700 may be a UE in a new radio system, in which case the shortened time interval is a time slot (or non-time slot unit) in the new radio system, and the standard time interval is a time slot in the new radio system, wherein, in terms of OFDM symbols, the time slot or non-time slot unit is part of the time slot. Signaling interaction between UE 700 and a base station (e.g., gNB) may use time slots. Additionally, sidelink transmissions may also use time slots between UEs.

[0091] The receiving unit 210 receives radio signals via an antenna. The first signal processing unit 750 processes the received signals, the resource demultiplexing unit 740 demultiplexes the resources transmitting the first control information and data, and sends the demultiplexed control information to the resource demapping unit 730 to demap the resources of the first control information, and the demodulation unit 720 demodulates the first control information to generate demodulated first control information. The decoding unit 710 decodes the demodulated first control information and sends the decoded information to the control circuit 770.

[0092] In one embodiment, the determining circuit 230 in the control circuit 770 receives decoded control information and determines, based on the received control information, whether to use the shortened time interval for signaling interaction between the user equipment and the base station. The operation of the determining circuit 230 has already been described above, so for clarity and brevity, a repeated description is omitted here.

[0093] After determining the shortened time interval for signaling interaction by circuit 230, control circuit 770 can control transmission unit 250 to transmit second control information using the shortened time interval during signaling interaction. Control circuit 770 can generate second control information and send the second control information (e.g., SR or BSR) and control signals to processing circuit 780. Encoding unit 782 encodes the second control information, modulation unit 784 modulates the second control information, resource mapping unit 786 maps the second control information to designated resources, and resource multiplexing unit 788 multiplexes the second control information with data to allocate designated resources to control information and data. After processing by second signal processing unit 760, the processed second control information is transmitted using the shortened time interval for signaling interaction with the base station.

[0094] Figure 7 The control circuit 770 shown is merely an example, and for illustrative and not limiting purposes, the control circuit 770 may also include other circuitry depending on the configuration of the user equipment, such as circuitry for controlling the aforementioned components.

[0095] It should be noted that, although Figure 7 This is merely an example and for illustrative purposes, but not a limitation. In practice, for example, depending on the communication system requirements, the UE 700 may include one or more of the integrated components.

[0096] Figure 8 A block diagram schematically illustrates an example of a base station 800 according to an embodiment of the present disclosure. In one embodiment, Figure 8 The base station shown can be used for user equipment (UE) scheduling side link transmission.

[0097] Figure 8The base station 800 shown includes a control information generation unit 810 and a transmission unit 830. The control information generation unit 810 can generate first control information, and the transmission unit 830 can send the first control information to the user equipment to indicate whether to use a shortened time interval for signaling interaction between the base station and the user equipment for sidelink transmission, wherein the length of the shortened time interval is less than the length of the standard time interval.

[0098] In one embodiment, the base station 800 may be an eNB in ​​LTE, in which case the shortened time interval is the shortened transmission time interval (sTTI), the standard time interval is the transmission time interval (TTI), and in terms of OFDM symbols, the sTTI is a part of the TTI. In one embodiment, after determining that the sTTI will be used for signaling interaction, the UE uses the sTTI to send second control information to the base station (e.g., the eNB) during the signaling interaction.

[0099] In one embodiment, the base station 800 may be a gNB in ​​an NR system, and in this case, the shortened time interval is a small time slot (or non-time slot unit) in the NR system, the standard time interval is a time slot in the NR system, and wherein, in terms of OFDM symbols, the small time slot or non-time slot unit is part of a time slot. In one embodiment, after determining that a small time slot or non-time slot unit will be used for signaling interaction, the user equipment uses the small time slot or non-time slot unit to send second control information to the base station (e.g., gNB) during signaling interaction. Additionally, after the user equipment determines that a small time slot or non-time slot unit will be used for signaling interaction in the NR system, the user equipment uses the small time slot or non-time slot unit to perform sidelink transmissions.

[0100] In one embodiment, the first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and whether to use a shortened time interval for signaling interaction is explicitly indicated by one or more of the radio resource control (RRC) signaling and downlink control information. Furthermore, as described above, the UE's determining circuit 230 can determine whether to use a shortened time interval or a standard time interval for signaling interaction based on one or more of the RRC signaling and DCI, the details of which have been described above. Figures 3A-3B and Figures 5A-5B The description has already been provided, so for the sake of clarity and brevity, repeated descriptions are omitted here.

[0101] In one embodiment, when the user equipment receives first control information within control resources specifically designated for the shortened time interval, the user equipment's determination circuit 230 determines the shortened time interval for signaling interaction, as already mentioned above. Figures 4A-4B and Figures 5A-5BThe details have been described, so for clarity and brevity, repeated descriptions are omitted here.

[0102] In one embodiment, the first control information includes downlink control information (DCI), and when the user equipment receives the downlink control information within control resources shared by the shortened time interval and the standard time interval, a determining circuit, referred to as user equipment 230, determines, based on one or more of the search space in the user equipment and the size of the downlink control information, whether to use the shortened time interval or the standard time interval for signaling interaction. This has already been combined with... Figures 4A-4B and Figures 5A-5B The operation of circuit 230 has been described, so for clarity and brevity, repeated descriptions are omitted here.

[0103] In one embodiment, the base station may further include a control unit (e.g., Figure 10 The control unit 1052 shown controls resource allocation for the first control information to be transmitted (e.g., the time interval for transmitting the first control information) and the time interval for signaling transmission. For example, the control unit can control the transmitting unit 830 to transmit the first control information at a standard time interval (e.g., a TTI in LTE or a time slot in NR) or at a shortened time interval (e.g., a sTTI in LTE or a small time slot in NR). Furthermore, the transmitting unit 830 also sends the first control information to the UE, indicating whether to use the shortened time interval or the standard time interval for signaling interaction. In one embodiment, when the shortened time interval is used for signaling interaction, the control unit can control the length of the shortened time interval.

[0104] Figure 9 A block diagram schematically illustrates an example of a base station 900 according to an embodiment of the present disclosure. The base station 900 includes a control information generation unit 810, a transmission unit 830, a reception unit 930, and a decision circuit 940. The components and configuration of the control information generation unit 810 and the transmission unit 830 are... Figure 8 The same as shown. Therefore, it has the same... Figure 8 Elements with similar functions are labeled with the same reference numerals, and for the sake of brevity and clarity, they will not be described again in this document.

[0105] In one embodiment, receiving unit 930 receives a report from user equipment via one or more scheduling requests and buffer unit status reports, wherein the report indicates the time interval selected by the user equipment for signaling interaction. Decision circuitry 940 determines whether to use the time interval selected by the user equipment for signaling interaction with the user equipment.

[0106] As referenced above Figure 6The UE 600's transmitting unit 250 transmits a report indicating the selected time interval (e.g., a shortened time interval or a standard time interval) for signaling interaction via one or more of a scheduling request (SR) and a buffer unit status report (BSR). The base station's decision circuit 940 confirms the time interval selected and recommended by the user equipment 650 and decides whether to use the selected time interval. (See above for reference.) Figure 6 The operation of the decision circuit 940 is described, and for the sake of clarity and brevity, repeated descriptions are omitted here.

[0107] After deciding to use the shortened time interval selected by the UE, the base station (eNB / gNB) sends a DCI to indicate that the shortened time interval is used for signaling interaction, and after deciding to use the standard time interval selected by the UE, the base station 900 sends a DCI to indicate that the standard time interval is used for signaling interaction.

[0108] In one embodiment, the base station may further include a control unit (e.g., Figure 10 The control unit 1052 shown controls resource allocation for the first control information to be transmitted (e.g., the time interval for transmitting the first control information), and controls the time interval for signaling transmission when the base station 900 receives a report from the UE, for example, based on decision information made by the decision circuit 940. For example, the control unit may control the transmitting unit 830 to transmit the first control information at a standard time interval (e.g., a TTI in LTE or a time slot in NR) or at a shortened time interval (e.g., a sTTI in LTE or a small time slot in NR). Furthermore, the transmitting unit 830 also transmits the first control information to the UE, indicating whether to use the shortened time interval or the standard time interval for signaling interaction. In one embodiment, when the shortened time interval is used for signaling interaction, the control unit may control the length of the shortened time interval.

[0109] In another embodiment, base station 900 may transmit control information (such as DCI format 5A in LTE) or sidelink scheduling assignment (PSCCH or PSBCH) indicating which TTI length (e.g., TTI or sTTI) is used for sidelink transmission. In particular, the sidelink scheduling assignment-based method can be used in Mode 3 (eNB-based sidelink transmission) in LTE and Mode 4 in which UE autonomous scheduling occurs.

[0110] In one embodiment, the first control information transmitted by the base station includes downlink control information (DCI) related to the sidelink, for example, DCI transmitted after receiving the BSR from the UE. The time at which the user equipment transmits the sidelink transmission is no earlier than a first time determined according to one of the following formulas a) and b):

[0111]

[0112]

[0113] in, This indicates the time when base station 900 transmits DCI related to the side link, m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the capacity of the user equipment and are configured by RRC or predetermined.

[0114] Figure 10 A block diagram schematically illustrates details of a base station 1000 according to an embodiment of the present invention. For example... Figure 10 As shown, the base station 1000 includes a processing circuit 1060 (including an error detection unit 1062, a decoding unit 1064, a demodulation unit 1066, and a signal demultiplexing unit 1068), an encoding unit 1010, a modulation unit 1020, a resource mapping unit 1030, a resource multiplexing unit 1040, a control circuit 1050 (including a decision circuit 940, a control unit 1052, and a control information generation unit 810), a transmitting unit 830, and a receiving unit 930. The components and configuration of the receiving unit 930, the decision circuit 940, the control information generation unit 810, and the transmitting unit 830 are similar to those of the base station 1000. Figure 9 The same as shown. Therefore, having the same Figure 9 The reference numbers of the functionally similar components shown are the same, and for the sake of brevity and clarity, they will not be described again in this document.

[0115] The control information generation unit 810 generates first control information. The encoding unit 1010 receives the first information from the control information generation unit 810, encodes the first control information, and sends the encoded first control information to the modulation unit 1020 for modulation. The resource mapping unit 1030 maps the modulated first control information to a specified resource, and the resource multiplexing unit 1040 multiplexes the first control information with data for transmission.

[0116] In one embodiment, the sending unit 830 sends first control information to the user equipment to indicate whether the shortened time interval is used for signaling interaction between the base station and the user equipment for sidelink transmission.

[0117] In one embodiment, the receiving unit 930 receives data from, such as via an SR or BSR. Figure 6The UE 600 shown here receives a UE reception report. The report indicates the time interval selected by the user equipment for signaling interaction. For example, the UE can select a shortened time interval or a standard time interval for signaling interaction with base station 1000. Signal demultiplexing unit 1068 demultiplexes the report using Fast Fourier Transform (FFT) and sends the demultiplexed report to demodulation unit 1066 for demodulation. The demodulated report is sent to decoding unit 1064 for decoding, and error detection unit 1062 checks for any errors in the report. The checked report is sent to decision circuit 940 in control circuit 1050 to determine whether to use the time interval selected by the user equipment for signaling interaction. The detailed operation of decision circuit 940 has been described above, and for clarity and brevity, its detailed description will be omitted here.

[0118] The control unit 1052 in the control circuit 1050 can control the resource allocation for the first control information to be transmitted (e.g., the time interval for transmitting the first control information) and control the time interval for signaling transmission. In one embodiment, when the base station 1000 receives a report from the UE, the control unit 1052 can control the time interval for signaling transmission based on the decision information made by the decision circuit 940. For example, the control unit 1052 can control the transmitting unit 830 to transmit the first control information at a standard time interval (e.g., a TTI in LTE or a time slot in NR) or at a shortened time interval (e.g., a sTTI in LTE or a small time slot in NR). Furthermore, the transmitting unit 830 also sends the first control information to the UE to indicate whether to use the shortened time interval or the standard time interval for signaling interaction. In one embodiment, when the shortened time interval is used for signaling interaction, the control unit 1052 can further control the length of the shortened time interval.

[0119] Figure 10 The control circuit 1050 shown is merely an example, and for illustrative purposes and not as a limitation, the control circuit 1050 may also include other circuits, such as circuits for controlling the aforementioned components, depending on the configuration of the base station 1000.

[0120] It should be understood that Figure 10 This is merely an example, and is for illustrative purposes and not a limitation. In practice, for example, depending on the requirements of the communication system, base station 1000 may include one or more of the integrated parts.

[0121] Figure 11An example of a communication flowchart between a user equipment (UE) and a base station according to an embodiment of this disclosure is illustrated schematically. UE 3300 may be a UE with a similar or different configuration from UE 3100. UE 3100 interacts with the base station via signaling before performing sidelink transmissions with UE 3300. (The last sentence appears to be incomplete and possibly refers to a different topic.) Figure 2 , Figure 6 and Figures 8-9 To describe Figure 11 .

[0122] In one embodiment, the flowchart can be applied to LTE, where the base station includes an eNB, and the shortened time interval is a shortened transmission time interval (sTTI), while the standard time interval is a transmission time interval (TTI). For OFDM symbols, the sTTI is a part of the TTI. In another embodiment, the flowchart can be applied to NR, where the base station includes a gNB, and in this case, the shortened time interval is a small time slot (or non-time slot unit) in the new radio system, the standard time interval is a time slot in the new radio system, and for OFDM symbols, the small time slot or non-time slot is a part of the time slot.

[0123] At step ST101, UE 3100 connects to base station 3200 during the connection process. The connection can be established by implementing known or future methods, the details of which are omitted herein.

[0124] At step ST102, UE 3100 sends an SR to the base station. In one embodiment, the SR may be a regular SR used for signaling interaction with base station 3200. In one embodiment, when UE 3100 selects a shortened time interval (e.g., sTTI in LTE, and hourly or non-timeslot units in NR) or a standard time interval (e.g., TTI in LTE, and timeslots in NR) for signaling interaction, the SR may be a sidelink SR for the shortened time interval and indicate the time interval selected by UE 3100.

[0125] At step ST103, base station 3200 decodes the received SR and generates control information. In one embodiment, when the SR is a sidelink SR for a shortened time interval, at step ST103, base station 3200 can confirm the time interval selected by the UE for signaling interaction, and the base station further determines whether to use the selected time interval for signaling interaction between the base station and UE 3100.

[0126] At step ST104, base station 3200 sends control information to UE 3100. In one embodiment, base station 3200 sends control information to indicate whether to use the shortened time interval for signaling interaction.

[0127] At step ST105, UE 3100 receives and processes the received control information.

[0128] In one embodiment, the control information sent at step ST104 includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and explicitly indicates whether the shortened time interval is used for signaling interaction via one or more of the radio resource control (RRC) signaling and downlink control information.

[0129] Furthermore, at step ST105, the determination circuit 230 of UE 3100 can determine, based on one or more of RRC signaling and DCI, whether to use the shortened time interval or the standard time interval for signaling interaction, as described above. Figures 3A-3B and Figures 5A-5B The details have been described, so for clarity and brevity, repeated descriptions are omitted here.

[0130] In one embodiment, at step ST105, when user equipment 3100 receives first control information within control resources specifically designated for the shortened time interval, the determination circuit 230 of user equipment 3100 determines the shortened time interval for signaling interaction, the details of which have been described above. Figures 4A-4B and Figures 5A-5B The description has already been provided, so for the sake of clarity and brevity, repeated descriptions are omitted here.

[0131] In one embodiment, the first control information sent at step ST104 includes downlink control information, and when user equipment 3100 receives the downlink control information in step S105 within control resources shared by the shortened time interval and the standard time interval, the determination circuit 230 of user equipment 3100 determines, based on one or more of the search space in user equipment and the size of the downlink control information, whether to use the shortened time interval or the standard time interval for signaling interaction. This has already been combined with... Figures 4A-4B and Figures 5A-5B The operation of circuit 230 has been described, so for clarity and brevity, repeated descriptions are omitted here.

[0132] At step ST106, UE 3100 sends a BSR to the base station. In one embodiment, when UE 3100 determines that a shortened time interval is used for signaling interaction, UE 3100 uses the shortened time interval to send the BSR. In yet another embodiment, when UE 3100 selects a shortened time interval (e.g., sTTI in LTE, and hourly or non-timeslot units in NR) or a standard time interval for signaling interaction, UE 3100 may report the selection to base station 3200 via a sidelink SR for the shortened time interval.

[0133] At step ST107, base station 3200 decodes the BSR and generates control information. In one embodiment, when the BSR is a sidelink BSR for a shortened time interval, base station 3200 may confirm in this step that UE 3100 chooses to use the selected time interval to interact with the base station, and the base station further decides whether to use the selected time interval for signaling interaction between the base station and UE 3100.

[0134] At step ST108, base station 3200 sends control information to UE 3100.

[0135] At step ST109, UE 3100 decodes the control information and encodes the data for sidelink transmission.

[0136] At step ST110, UE 3100 performs a sidelink transmission. In one embodiment, when the flowchart is applied to LTE, such as Mode 3 in LTE-V2X, UE 3100 performs a sidelink transmission using a TTI. In one embodiment, when the flowchart is applied to NR, UE 3100 can perform a sidelink transmission using either a time slot or a non-time slot unit when performing signaling interaction with base station 3200 using a time slot.

[0137] When UE 3100 determines at a certain step that a shortened time interval is used for signaling interaction in the sidelink transmission, it uses the shortened time interval to implement subsequent steps in the signaling interaction. For example, when UE 3100 determines at step ST105 that a shortened time interval is used for signaling interaction in the sidelink transmission, it uses the shortened time interval to implement subsequent steps ST106-ST109 in the signaling interaction.

[0138] Figure 12 A flowchart of a communication method 1200 according to an embodiment of the present invention is schematically shown. This communication method is for a user equipment (UE) capable of performing sidelink transmission based on base station scheduling. (In conjunction with...) Figure 2 and Figure 6 describe Figure 12 Flowchart 1200.

[0139] In step 1220, the receiving unit 210 receives the first control information from the base station.

[0140] At step 1240, the determining circuit 230 determines, based on the received first control information, whether to use the shortened time interval for signaling interaction between the user equipment 600 and the base station for sidelink transmission.

[0141] At step 1260, after the determining circuit 230 determines that the shortened time interval is used for signaling interaction of the side link transmission, the sending unit 250 sends the second control information to the base station using the shortened time interval, wherein the length of the shortened time interval is less than the length of the standard time interval.

[0142] In one embodiment, the shortened time interval is the shortened transmission time interval (sTTI), the standard time interval is the transmission time interval (TTI), and in relation to OFDM symbols, sTTI is a part of TTI.

[0143] In one embodiment, the shortened time interval is a time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and the time slot or non-time slot is part of the time slot in terms of OFDM symbols.

[0144] In one embodiment, the first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and the method further includes determining, based on one or more of the radio resource control (RRC) signaling and downlink control information, whether the shortened time interval is used for signaling interaction.

[0145] In one embodiment, the method further includes determining that the shortened time interval is used for signaling interaction when the receiving unit 210 receives the first control information within a control resource specifically designated for the shortened time interval.

[0146] In one embodiment, the first control information includes downlink control information (DCI), and the method further includes: when the receiving unit 210 receives the downlink control information within control resources shared by the shortened time interval and the standard time interval, determining whether to use the shortened time interval for signaling interaction based on one or more of the search space in the user equipment 600 and the size of the downlink control information (DCI).

[0147] In one embodiment, the first control information includes downlink control information (DCI) relating to the sidelink, and the method further includes transmitting the sidelink transmission no earlier than a transmission time determined according to one of equations a) and b):

[0148]

[0149]

[0150] in, This indicates the time at which the base station transmits DCI related to the sidelink, where m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the user equipment capacity and are configured by RRC or predetermined.

[0151] In one embodiment, the method further includes: selecting a shortened time interval or a standard time interval for signaling interaction between the user equipment and the base station, wherein the sending unit 250 transmits a report of the time interval selected for signaling interaction via one or more transmission indications in the scheduling request and the buffer unit status report.

[0152] In one embodiment, after the user equipment determines whether a time slot or non-time slot unit is used for signaling interaction in a new radio system, the user equipment performs side link transmissions using the time slot or non-time slot unit.

[0153] Figure 13 A flowchart 1300 illustrating a communication method according to an embodiment of the present invention is shown schematically. (In conjunction with...) Figure 8 and Figure 9 Describe the flowchart 1300.

[0154] At step 1320, circuit 810 generates first control information at the base station.

[0155] At step 1340, the sending unit 830 sends first control information to the user equipment to indicate whether the shortened time interval is used for signaling interaction between the base station and the user equipment for side link transmission, wherein the length of the shortened time interval is less than the length of the standard time interval.

[0156] In one embodiment, the shortened time interval is the shortened transmission time interval (sTTI), the standard time interval is the transmission time interval (TTI), and the sTTI is a part of the TTI in relation to OFDM symbols, and the user equipment uses the sTTI to send second control information to the base station during the signaling interaction after determining that the sTTI will be used for signaling interaction.

[0157] In one embodiment, the shortened time interval is a time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and the time slot or non-time slot is a part of the time slot in terms of OFDM symbols, wherein after determining that the time slot or non-time slot is used for signaling interaction, the user equipment uses the time slot or non-time slot unit to send second control information to the base station during the signaling interaction.

[0158] In one embodiment, the first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and the method further includes configuring one or more of the radio resource control (RRC) signaling and downlink control information to explicitly indicate whether a shortened time interval is used for signaling interaction.

[0159] In one embodiment, when the user equipment receives first control information within a control resource specifically designated for the shortened time interval, the user equipment determines that the shortened time interval is used for signaling interaction.

[0160] In one embodiment, the first control information includes downlink control information, and when the user equipment receives the downlink control information within a control resource shared by the shortened time interval and the standard time interval, the user equipment determines whether to use the shortened time interval for signaling interaction based on one or more of the search space in the user equipment and the size of the downlink control information.

[0161] In one embodiment, the first control information includes downlink control information (DCI) relating to the sidelink, and the user equipment transmits the sidelink transmission no earlier than a first time determined according to one of equations a) and b) below:

[0162]

[0163]

[0164] in, This indicates the time at which the base station transmits DCI related to the sidelink, where m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the user equipment capacity and are configured by RRC or predetermined.

[0165] In one embodiment, the method further includes receiving a report from the user equipment via one or more of a scheduling request and a buffer unit status report, wherein the report indicates a time interval selected by the user equipment for signaling interaction; and deciding whether to use the time interval selected by the user equipment to perform signaling interaction with the user equipment.

[0166] In one embodiment, after the user equipment determines whether a time slot or non-time slot unit is used for signaling interaction in the new radio system, the user equipment performs side link transmissions using the time slot or non-time slot unit.

[0167] The above description is illustrative of embodiments of this disclosure and not restrictive.

[0168] In addition, embodiments of this disclosure may provide at least the following topics.

[0169] (1). A user equipment (UE) for sidelink transmission based on base station scheduling, comprising:

[0170] The receiving unit receives first control information from the base station;

[0171] The circuit determines, based on the received first control information, whether to use the shortened time interval for signaling interaction between the user equipment and the base station for sidelink transmission; and

[0172] After the determining circuit determines that the shortened time interval is used for signaling interaction of the side link transmission, the transmitting unit sends second control information to the base station during the signaling interaction using the shortened time interval.

[0173] The shortened time interval is shorter than the standard time interval.

[0174] (2). The user equipment according to claim (1), wherein the shortened time interval is the shortened transmission time interval sTTI, the standard time interval is the transmission time interval TTI, and in terms of OFDM symbols, sTTI is a part of TTI.

[0175] (3). The user equipment according to claim (1), wherein the shortened time interval is a time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and wherein, with respect to OFDM symbols, the time slot or non-time slot is part of the time slot.

[0176] (4). The user equipment according to claim (1), wherein the first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and wherein the determining circuit determines, based on one or more of the radio resource control (RRC) signaling and downlink control information, whether to use the shortened time interval for signaling interaction.

[0177] (5) The user equipment according to claim (1), wherein when the receiving unit receives the first control information within a control resource specifically designated for the shortened time interval, the determining circuit determines the shortened time interval for signaling interaction.

[0178] (6) The user equipment according to claim (1), wherein the first control information includes downlink control information (DCI), and wherein when the receiving unit receives the downlink control information within control resources shared by the shortened time interval and the standard time interval, the determining circuit determines whether to use the shortened time interval for signaling interaction based on one or more of the search space in the user equipment and the size of the downlink control information (DCI).

[0179] (7). The user equipment according to claim (1), wherein the first control information includes downlink control information (DCI) related to the sidelink, and the user equipment transmits the sidelink transmission at a time not earlier than a first time determined according to one of the following formulas a) and b):

[0180]

[0181]

[0182] in, This indicates the time at which the base station transmits DCI related to the sidelink, where m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the user equipment capacity and are configured by RRC or predetermined.

[0183] (8). The user equipment according to claim (1) further includes:

[0184] The selection circuitry chooses between a shortened or standard time interval for signaling interactions between the user equipment and the base station used for sidelink transmission.

[0185] The sending unit sends a report indicating the selected time interval for signaling interaction via one or more of the scheduling request and the buffer unit status report.

[0186] (9) The user equipment according to claim (3), wherein, after the user equipment determines that a time slot or non-time slot unit is used for signaling interaction in the new radio system, the user equipment uses the time slot or non-time slot unit to perform side link transmission.

[0187] (10). A communication method for user equipment (UE) based on base station scheduling for sidelink transmission, comprising:

[0188] Receive first control information from the base station;

[0189] Based on the received first control information, determine whether to use the shortened time interval for signaling interaction between the user equipment and the base station for sidelink transmission; and

[0190] After determining the shortened time interval for signaling interaction in the sidelink transmission, the shortened time interval is used to send second control information to the base station.

[0191] The shortened time interval is shorter than the standard time interval.

[0192] (11). The communication method according to claim (10), wherein the shortened time interval is the shortened transmission time interval sTTI, the standard time interval is the transmission time interval TTI, and in terms of OFDM symbols, sTTI is a part of TTI.

[0193] (12). The communication method according to claim (10), wherein the shortened time interval is a time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and wherein, with respect to OFDM symbols, the time slot or non-time slot is part of the time slot.

[0194] (13). The communication method according to claim (10), wherein the first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and wherein the method further includes: determining, based on one or more of the radio resource control (RRC) signaling and downlink control information, whether to use the shortened time interval for signaling interaction.

[0195] (14). The communication method according to claim (10) further includes: when the first control information is received within a control resource specifically designated for the shortened time interval, determining that the shortened time interval is used for signaling interaction.

[0196] (15). The communication method according to claim (10), wherein the first control information includes downlink control information (DCI), and wherein the method further comprises: when the receiving unit receives downlink control information within control resources shared by the shortened time interval and the standard time interval, determining whether to use the shortened time interval for signaling interaction based on one or more of the search space in the user equipment and the size of the downlink control information DCI.

[0197] (16). The communication method according to claim (10), wherein the first control information includes downlink control information (DCI) related to the sidelink, and the method further includes: the user equipment transmitting the sidelink transmission at a time not earlier than a first time determined according to one of the following formulas a) and b):

[0198]

[0199]

[0200] in, This indicates the time at which the base station transmits DCI related to the sidelink, where m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the user equipment capacity and are configured by RRC or predetermined.

[0201] (17). The communication method according to claim (10) further includes:

[0202] For signaling interactions between user equipment and base stations used for sidelink transmission, a shortened time interval or a standard time interval can be selected.

[0203] The sending unit sends a report indicating the selected time interval for signaling interaction via one or more of the scheduling request and the buffer unit status report.

[0204] (18). The communication method according to claim (12), wherein after the user equipment determines that a time slot or non-time slot unit is used for signaling interaction in the new radio system, the user equipment uses the time slot or non-time slot unit to perform side link transmission.

[0205] (19). A base station for scheduling side-link transmission of user equipment (UE), comprising:

[0206] The control information generation unit generates first control information; and

[0207] The transmitting unit sends first control information to the user equipment to indicate whether the shortened time interval should be used for signaling interaction between the base station and the user equipment for sidelink transmission.

[0208] The shortened time interval is shorter than the standard time interval.

[0209] (20) The base station according to claim (19), wherein the shortened time interval is a shortened transmission time interval sTTI, the standard time interval is a transmission time interval TTI, and in terms of OFDM symbols, sTTI is a part of TTI, and wherein, after determining that sTTI is used for signaling interaction, during the signaling interaction, the user equipment uses sTTI to send second control information to the base station.

[0210] (21). The base station according to claim (19), wherein the shortened time interval is a time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and wherein, with respect to OFDM symbols, the time slot or non-time slot unit is part of a time slot, and wherein, after determining that the time slot or non-time slot unit is used for signaling interaction, during the signaling interaction, the user equipment uses the time slot or non-time slot unit to send second control information to the base station.

[0211] (22). The base station according to claim (19), wherein the first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and wherein the radio resource control (RRC) signaling and downlink control information are used to explicitly indicate whether the shortened time interval is used for signaling interaction.

[0212] (23). The base station according to claim (19), wherein when the user equipment receives the first control information within a control resource specifically designated for the shortened time interval, the user equipment determines that the shortened time interval is used for signaling interaction.

[0213] (24). The base station according to claim (19), wherein the first control information includes downlink control information, and wherein when the user equipment receives downlink control information within control resources shared by the shortened time interval and the standard time interval, the user equipment determines whether to use the shortened time interval for signaling interaction based on one or more of the search space in the user equipment and the size of the downlink control information.

[0214] (25). The base station according to claim (19), wherein the first control information includes downlink control information (DCI) related to the sidelink, and the time at which the user equipment transmits the sidelink transmission is not earlier than a first time determined according to one of the following formulas a) and b):

[0215]

[0216]

[0217] in, This indicates the time at which the base station transmits DCI related to the sidelink, where m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the user equipment capacity and are configured by RRC or predetermined.

[0218] (26). The base station according to claim (19) further includes:

[0219] The receiving unit receives a report from the user equipment via one or more of a scheduling request and a buffer unit status report, wherein the report indicates a time interval selected by the user equipment for signaling interaction; and

[0220] The decision circuit determines whether to use the time interval selected by the user equipment to interact with the user equipment via signaling.

[0221] (27). The base station according to claim (21), wherein after the user equipment determines that a time slot or non-time slot unit is used for signaling interaction in a new radio system, the user equipment performs side link transmission using the time slot or non-time slot unit.

[0222] (28). A communication method for a base station scheduling side link transmission for a user equipment (UE), comprising:

[0223] Generate first control information at the base station; and

[0224] The first control information is sent to the user equipment, indicating whether the shortened time interval should be used for signaling interaction between the base station and the user equipment for link transmission.

[0225] The shortened time interval is shorter than the standard time interval.

[0226] (29). The communication method according to claim (28), wherein the shortened time interval is a shortened transmission time interval sTTI, the standard time interval is a transmission time interval TTI, and in terms of OFDM symbols, sTTI is a part of TTI, and wherein, after determining that sTTI is used for signaling interaction, during the signaling interaction, the user equipment uses sTTI to send second control information to the base station.

[0227] (30). The communication method according to claim (28), wherein the shortened time interval is a time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and wherein, with respect to OFDM symbols, the time slot or non-time slot unit is part of a time slot, and wherein, after determining that the time slot or non-time slot unit is used for signaling interaction, during the signaling interaction, the user equipment uses the time slot or non-time slot unit to send second control information to the base station.

[0228] (31). The communication method according to claim (28), wherein the first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and wherein the radio resource control (RRC) signaling and downlink control information are used to explicitly indicate whether the shortened time interval is used for signaling interaction.

[0229] (32). The communication method according to claim (28), wherein when the user equipment receives the first control information within a control resource specifically designated for the shortened time interval, the user equipment determines that the shortened time interval is used for signaling interaction.

[0230] (33). The communication method according to claim (28), wherein the first control information includes downlink control information, and wherein the method further includes: when the user equipment receives downlink control information within a control resource shared by a shortened time interval and a standard time interval, determining whether to use the shortened time interval for signaling interaction based on one or more of the search space in the user equipment and the size of the downlink control information.

[0231] (34). The communication method according to claim (28), wherein the first control information includes downlink control information (DCI) related to the sidelink, and the time at which the user equipment transmits the sidelink transmission is not earlier than a first time determined according to one of the following formulas a) and b):

[0232]

[0233]

[0234] in, This indicates the time at which the base station transmits DCI related to the sidelink, where m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the user equipment capacity and are configured by RRC or predetermined.

[0235] (35). The communication method according to claim (28) further includes:

[0236] Receive a report from the user equipment via one or more of a scheduling request and a buffer unit status report, wherein the report indicates a time interval selected by the user equipment for signaling interaction; and

[0237] Decide whether to use the time interval selected by the user equipment to interact with the user equipment for signaling.

[0238] (36). The communication method according to claim (30), wherein after the user equipment determines that a time slot or non-time slot unit is used for signaling interaction in a new radio system, the user equipment performs side link transmission using the time slot or non-time slot unit.

[0239] This disclosure can be implemented in software, hardware, or software cooperating with hardware. Each functional block used in the description of each of the above embodiments can be partially or wholly implemented by an LSI such as an integrated circuit, and each process described in each embodiment can be partially or wholly controlled by the same LSI or a combination of LSIs. An LSI can be formed as a chip on its own, or a chip can be formed to include some or all of the functional blocks. An LSI can include data inputs and outputs coupled thereto. Depending on the level of integration, the LSI herein can be referred to as an IC, a system LSI, a super LSI, or an ultra-LSI. However, the technology for implementing integrated circuits is not limited to LSIs and can be implemented using dedicated circuits, general-purpose processors, or special-purpose processors. Additionally, an FPGA (Field-Programmable Gate Array) programmable after the LSI is manufactured, or a reconfigurable processor in which the connections and settings of circuit cells arranged within the LSI can be reconfigured, can be used. This disclosure can be implemented for digital or analog processing. If future integrated circuit technology replaces LSIs due to advancements in semiconductor technology or other derivative technologies, future integrated circuit technology can be used to integrate the functional blocks. Biotechnology can also be applied.

[0240] Examples of several embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings of specific embodiments. Since it is obviously impossible to describe every possible combination of components or technologies, those skilled in the art will understand that various modifications can be made to the above embodiments without departing from the scope of the present disclosure. For example, it will be readily understood that although the above embodiments have been described with reference to various parts of a 3GPP network, embodiments of the present disclosure will also be applicable to similar networks, such as 3GPP networks with similar functional components.

[0241] Therefore, specifically, the terms 3GPP and related or relevant terms used in the above description and drawings and any appended claims will be interpreted accordingly now or in the future.

[0242] This disclosure can be implemented in software, hardware, or software working in conjunction with hardware. Each functional block used in the description of each of the above embodiments can be implemented as an LSI as an integrated circuit, and each process described in each embodiment can be controlled by an LSI. They can be individually configured as chips, or a chip can be configured to include some or all of the functional blocks. They can include data inputs and outputs coupled thereto. Depending on the level of integration, the LSI herein can be referred to as an IC, system LSI, super LSI, or ultra-LSI. However, the technology for implementing integrated circuits is not limited to LSIs and can be implemented using dedicated circuits or general-purpose processors. Alternatively, an FPGA (Field-Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor in which the connections and settings of circuit cells arranged within the LSI can be reconfigured, can be used.

[0243] It is worth noting that, with the help of the teachings presented in the foregoing specification and related drawings, those skilled in the art will conceive of modifications and other embodiments of the disclosed content. Therefore, it should be understood that this disclosure is not limited to the specific embodiments disclosed, and modifications and other embodiments are intended to be included within the scope of this disclosure. Although specific terms may be used herein, they are used only in a general and descriptive sense and not for limiting purposes.

Claims

1. A user equipment (UE) for sidelink transmission based on base station scheduling, comprising: The receiving unit receives first control information from the base station for side link transmission; The circuit determines, based on the received first control information, the shortened time interval used in the signaling for sidelink transmission between the UE and the base station; as well as The transmitting unit sends second control information to the base station using the shortened time interval. Wherein, the shortened time interval is less than the standard time interval used in the signaling between the UE and another UE in the sidelink transmission, and the time offset between the reception of the first control information and the sidelink transmission is configured to determine a first time, wherein the time when the UE sends the sidelink transmission is not earlier than the first time.

2. The UE according to claim 1, wherein, The shortened time interval is the shortened transmission time interval sTTI, the standard time interval is the transmission time interval TTI, and in terms of OFDM symbols, sTTI is a part of TTI.

3. The UE according to claim 1, wherein, The shortened time interval is a small time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and in terms of OFDM symbols, the small time slot or non-time slot is part of the time slot.

4. The UE according to claim 1, wherein, The first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and wherein the circuit determines, based on one or more of the DCI and RRC signaling, whether to use the shortened time interval for the signaling.

5. The UE according to claim 1, wherein, When the receiving unit receives the first control information within a control resource specifically designated for the shortened time interval, the circuit determines that the shortened time interval is used for the signaling.

6. The UE according to claim 1, wherein, The first control information includes downlink control information (DCI), and wherein, when the receiving unit receives the DCI within control resources shared by the shortened time interval and the standard time interval, the circuit determines whether to use the shortened time interval for the signaling based on one or more of the search space in the UE and the size of the DCI.

7. The UE according to claim 1, wherein, The first control information includes downlink control information (DCI) related to the sidelink, and the time at which the UE transmits the sidelink transmission is no earlier than the first time determined according to one of the following formulas a) and b): a) b) in, The time at which the base station transmits DCI related to the sidelink is represented, m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the capacity of the UE and are configured or predetermined by Radio Resource Control (RRC) signaling.

8. The UE according to claim 1, wherein: The circuit selects either the shortened time interval or the standard time interval for signaling used for sidelink transmission between the UE and the base station. The sending unit sends a report indicating the selected time interval for the signaling via one or more of the scheduling request and the buffer unit status report.

9. The UE according to claim 3, wherein, After the circuit determines that the hourly slot or the non-hourly slot unit is used for the signaling in the new radio system, the UE uses the hourly slot or the non-hourly slot unit to perform sidelink transmission.

10. A communication method for user equipment (UE) performing sidelink transmission based on base station scheduling, comprising: Receive first control information from the base station for side link transmission; The shortened time interval used in the signaling for sidelink transmission between the UE and the base station is determined based on the received first control information; as well as The second control information is sent to the base station using the shortened time interval. Wherein, the shortened time interval is less than the standard time interval used in the signaling between the UE and another UE in the sidelink transmission, and the time offset between the reception of the first control information and the sidelink transmission is configured to determine a first time, wherein the time when the UE sends the sidelink transmission is not earlier than the first time.

11. A base station for sidelink transmission based on base station scheduling, comprising: The transmitting unit sends first control information for sidelink transmission to the user equipment (UE); as well as The receiving unit receives second control information, which is transmitted from the UE using a shortened time interval determined based on the first control information. Wherein, the shortened time interval is less than the standard time interval used in the signaling between the UE and another UE in the sidelink transmission, and the time offset between the reception of the first control information and the sidelink transmission is configured to determine a first time, wherein the time when the UE sends the sidelink transmission is not earlier than the first time.

12. The base station according to claim 11, wherein, The shortened time interval is the shortened transmission time interval sTTI, the standard time interval is the transmission time interval TTI, and in terms of OFDM symbols, sTTI is a part of TTI.

13. The base station according to claim 11, wherein, The shortened time interval is a small time slot or non-time slot unit in the new radio system, the standard time interval is a time slot in the new radio system, and in terms of OFDM symbols, the small time slot or non-time slot unit is part of the time slot.

14. The base station according to claim 11, wherein, The first control information includes one or more of downlink control information (DCI) and radio resource control (RRC) signaling, and wherein it is determined, based on one or more of the DCI and RRC signaling, whether to use the shortened time interval for the signaling.

15. The base station according to claim 11, wherein, When the transmitting unit transmits the first control information within a control resource specifically designated for the shortened time interval, the shortened time interval is used for the signaling.

16. The base station according to claim 11, wherein, The first control information includes downlink control information (DCI), and wherein, when the transmitting unit transmits the DCI within control resources shared by the shortened time interval and the standard time interval, it determines whether to use the shortened time interval for the signaling based on one or more of the search space in the UE and the size of the DCI.

17. The base station according to claim 11, wherein, The first control information includes downlink control information (DCI) related to the sidelink, and the time at which the UE transmits the sidelink transmission is no earlier than the first time determined according to one of the following formulas a) and b): a) b) in, The time at which the base station transmits DCI related to the sidelink is represented, m represents the time offset, S represents the length of the shortened time interval in seconds (s), and X and Y are related to the capacity of the UE and are configured or predetermined by Radio Resource Control (RRC) signaling.

18. The base station according to claim 11, wherein: The shortened time interval or the standard time interval is selected for signaling used for sidelink transmission between the UE and the base station. The receiving unit receives a report indicating the selected time interval for the signaling via one or more of a scheduling request and a buffer unit status report.

19. The base station according to claim 13, wherein, The hourly slot or the non-hourly slot unit is used for the signaling in the new radio system, and the side link transmission is performed using the hourly slot or the non-hourly slot unit.

20. A communication method for a base station performing sidelink transmission based on base station scheduling, comprising: Send first control information for the side link transmission to the user equipment (UE); as well as The system receives second control information, which is transmitted from the UE using a shortened time interval determined based on the first control information. Wherein, the shortened time interval is less than the standard time interval used in the signaling between the UE and another UE in the sidelink transmission, and the time offset between the reception of the first control information and the sidelink transmission is configured to determine a first time, wherein the time when the UE sends the sidelink transmission is not earlier than the first time.

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