Transmission device and transmission method thereof

Abstract

A transmission device and a transmission method thereof are provided. A transmission method of a user equipment (UE), comprising being configured by a base station to transmit a first transmission on a first group of symbols in a time domain, transmit a second transmission on a second group of symbols in a time domain, and adjust the first transmission. This can determine priority transmissions, and can further determine priorities in a shared spectrum system.

Description

[0001] This application is a divisional application of Chinese patent application No. 202080099909.0, entitled "Transmission Apparatus and Transmission Method Thereof", which entered the Chinese national phase of PCT international patent application PCT / IB2020 / 000488, filed on April 17, 2020. Technical Field

[0002] This disclosure relates to the field of communication systems, and in particular to a transmission device and transmission method that can provide good communication performance and high reliability. Background Technology

[0003] In unlicensed frequency bands, unlicensed spectrum (NRU) is shared spectrum. Communication equipment in different communication systems can use unlicensed spectrum, as long as the unlicensed spectrum complies with national or regional regulatory requirements for spectrum allocation. No proprietary spectrum license is required from the government.

[0004] To allow various communication systems using unlicensed spectrum to coexist amicably within the spectrum, some countries or regions have stipulated regulatory requirements for the use of unlicensed spectrum. For example, communication devices must follow a listen-before-talk (LBT) process, meaning that the device must perform channel sensing before transmitting a signal on the channel. If the LBT result indicates that the channel is idle, the device can transmit a signal; otherwise, it cannot. To ensure fairness, once a device successfully occupies the channel, the transmission duration cannot exceed the maximum channel occupancy time (MCOT).

[0005] On unlicensed carriers, the channel occupancy time obtained by the base station can be shared with user equipment (UE) to transmit uplink signals or uplink channels. In other words, when the base station and UE share their channel occupancy time, the UE can use a higher-priority LBT (Local Bit By-Touch) method than its own to acquire the channel, thus having a greater probability of acquiring the channel.

[0006] In New Radio-Based Access (NRU) for unlicensed spectrum, wideband operation can be configured, and the configured active bandwidth part (BWP) can include resource block sets (RB sets). Furthermore, in NRU wideband operation, the base station (BS) (e.g., gNB) and the UE can operate in a wider frequency band including RB sets. NR Release 15 has defined the BWP concept, therefore, in the context of NRU wideband operation, an active BWP including multiple RB sets can be configured for the UE. The gNB can allocate multiple RB sets to the UE for uplink transmissions, such as physical uplink control channel (PUCCH) transmissions. However, by specification, the sender needs to perform an LBT procedure before each transmission in the spectrum. This means that for transmissions with multiple RB sets, a multi-RB set-based LBT must be performed.

[0007] Furthermore, in version 16, if a UE is configured by a base station to receive downlink transmissions, the UE does not know whether the base station will actually implement the configured downlink transmissions, and the UE needs to receive the configured downlink transmissions, or the base station will cancel the configured downlink transmissions due to, for example, prioritizing resources configured for other services, so the UE needs to cancel receiving the configured downlink transmissions.

[0008] Furthermore, in version 15, the UE can be configured to perform configured licensed transports. These configured licensed transports are performed on pre-configured resources without waiting for further dynamic uplink grants. However, when the UE is dynamically licensed and if the dynamic transport is scheduled on configured licensed resources, the UE needs to prioritize the dynamic transport over the configured licensed transport. However, determining the priority order in a shared spectrum system remains an open question.

[0009] Therefore, there is a need for a transmission device and transmission method that can solve the problems in the prior art. Summary of the Invention

[0010] The purpose of this disclosure is to provide an apparatus for, for example, a user equipment (UE) and a transmission method thereof, which can solve the problems in the prior art, determine the priority of transmission, and further determine the priority in a shared spectrum system.

[0011] In a first aspect of this disclosure, a method for transmitting a user equipment (UE) in a shared spectrum includes being configured by a base station to transmit a first transmission on a first set of symbols in the time domain; being configured by the base station to transmit a second transmission on a second set of symbols in the time domain; and adjusting the first transmission.

[0012] In a second aspect of this disclosure, the UE includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The transceiver is configured by a base station to transmit a first transmission on a first set of symbols in the time domain, the transceiver is configured by the base station to transmit a second transmission on a second set of symbols in the time domain, and the transceiver is configured to adjust the first transmission.

[0013] In a third aspect of this disclosure, a non-transitory machine-readable storage medium stores instructions that, when executed by a computer, cause the computer to perform the methods described above.

[0014] In a fourth aspect of this disclosure, a chip includes a processor configured to invoke and run a computer program stored in a memory to cause a device on which the chip is mounted to perform the above methods.

[0015] In a fifth aspect of this disclosure, a computer-readable storage medium is provided, wherein a computer program is stored that causes a computer to perform the above methods.

[0016] In a sixth aspect of this disclosure, a computer program product includes a computer program that causes a computer to perform the above methods.

[0017] In a seventh aspect of this disclosure, a computer program causes a computer to perform the above methods. Attached Figure Description

[0018] To more clearly illustrate the embodiments or related technologies of the present invention, the following drawings, which will be described in the embodiments, are briefly introduced. Obviously, the drawings are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any effort.

[0019] Figure 1 This is a block diagram of a user equipment (UE) and a base station (BS) (e.g., gNB) communicating in a communication network system according to one embodiment of this disclosure.

[0020] Figure 2 This is a flowchart illustrating a transmission method of a UE according to one embodiment of the present disclosure.

[0021] Figure 3 This is a schematic diagram illustrating that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission partially or completely overlap in the time domain.

[0022] Figure 4This is a schematic diagram illustrating that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission are continuous in the time domain.

[0023] Figure 5 This is a schematic diagram illustrating that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission partially or completely overlap in the time domain.

[0024] Figure 6 This is a schematic diagram illustrating that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission are continuous in the time domain.

[0025] Figure 7 This is a schematic diagram illustrating UE behavior 1 in an embodiment of the present disclosure where resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission partially or completely overlap in the time domain.

[0026] Figure 8 This is a schematic diagram illustrating UE behavior 1 in an embodiment of the present disclosure where the resources (e.g., a first set of symbols) for a first transmission and the resources (e.g., a second set of symbols) for a second transmission are continuous in the time domain.

[0027] Figure 9 This is a schematic diagram illustrating UE behavior 2 in an embodiment of the present disclosure where resources (e.g., a first set of symbols) used for a first transmission and resources (e.g., a second set of symbols) used for a second transmission partially or completely overlap in the time domain.

[0028] Figure 10 This is a schematic diagram illustrating UE behavior 2 in an embodiment of the present disclosure where the resources (e.g., the first set of symbols) used for the first transmission and the resources (e.g., the second set of symbols) used for the second transmission are continuous in the time domain.

[0029] Figure 11 This is a schematic diagram illustrating UE behavior 3 in an embodiment of the present disclosure where resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission partially or completely overlap in the time domain.

[0030] Figure 12This is a schematic diagram illustrating UE behavior 3 in an embodiment of the present disclosure where the resources (e.g., the first set of symbols) used for the first transmission and the resources (e.g., the second set of symbols) used for the second transmission are continuous in the time domain.

[0031] Figure 13 This is a schematic diagram illustrating UE behavior 4 in an embodiment of the present disclosure where resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission partially or completely overlap in the time domain.

[0032] Figure 14 This is a schematic diagram illustrating UE behavior 4 in an embodiment of the present disclosure where the resources (e.g., the first set of symbols) used for the first transmission and the resources (e.g., the second set of symbols) used for the second transmission are continuous in the time domain.

[0033] Figure 15 This is a block diagram of a system for wireless communication according to one embodiment of the present disclosure. Detailed Implementation

[0034] The technical problems, structural features, objectives, and effects of the embodiments of this disclosure are described in detail below with reference to the accompanying drawings. Specifically, the terminology used in the embodiments of this disclosure is for the purpose of describing a particular embodiment only and is not intended to limit the scope of this disclosure.

[0035] Figure 1 The illustration shows a user equipment (UE) 10 and a base station (BS) (e.g., gNB) 20 communicating in a communication network system 30 according to one embodiment of this disclosure in some implementations. The communication network system 30 includes one or more UEs 10 and BSs 20 in a cell. UE 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and transceiver 13. Base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and transceiver 23. Processor 11 or 21 may be configured to implement the functions, procedures, and / or methods proposed in this specification. A layer of radio interface protocol may be implemented in processor 11 or 21. Memory 12 or 22 is operatively coupled to processor 11 or 21 and stores various first information to operate processor 11 or 21. Transceiver 13 or 23 is operatively coupled to processor 11 or 21 and transmits and / or receives radio signals.

[0036] Processor 11 or 21 may include an application-specific integrated circuit (ASIC), other chipsets, logic circuits, and / or data processing devices. Memory 12 or 22 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and / or other storage devices. Transceiver 13 or 23 may include baseband circuitry for processing radio frequency signals. When the implementation is in software, the techniques described herein can be implemented using modules (e.g., processes, functions, etc.) that perform the functions described herein. Modules may be stored in memory 12 or 22 and executed by processor 11 or 21. Memory 12 or 22 may be implemented internally or externally to processor 11 or 21; in the case of external implementation, memory 12 or 22 may be communicatively coupled to processor 11 or 21 via various means known in the art.

[0037] In some implementations, transceiver 13 is configured by base station 20 to transmit a first transmission on a first set of symbols in the time domain, transceiver 13 is configured by base station 20 to transmit a second transmission on a second set of symbols in the time domain, and transceiver 13 is configured to adjust the first transmission. This can solve the problems in the prior art, can determine the priority of transmission, and can further determine the priority in a shared spectrum system.

[0038] In some embodiments, transceiver 13 can adjust the first transmission. In some embodiments, the second transmission is scheduled by downlink control information (DCI). In some embodiments, the DCI includes at least one of the following formats: format 0_0; format 0_1; format 0_2; format 1_0; format 1_1; or format 1_2. In some embodiments, the DCI is detected by processor 11 in a control resource set (CORESET). In some embodiments, the first set of symbols and the second set of symbols are consecutive in the time domain. In some embodiments, the first set of symbols and the second set of symbols completely overlap or partially overlap in the time domain. In some embodiments, the first set of symbols begins earlier than the second set of symbols in the time domain. In some embodiments, the first set of symbols begins later than the last symbol of the CORESET in the time domain. In some embodiments, at least one symbol in the first set of symbols is within a first time interval. In some embodiments, the first time interval includes a duration and a start position. In some embodiments, the start position includes the last symbol of the CORESET. In some embodiments, the duration includes a certain number of symbols. In some embodiments, the duration is predefined and / or preconfigured. In some embodiments, the duration corresponds to the preparation time for the second transmission. In some embodiments, adjusting the first transmission includes canceling the first transmission on a subset of the symbols in the first set of symbols. In some embodiments, the determination of the subset of symbols corresponds to at least one of the following: the position of the CORESET; the position of the first set of symbols; or the position of the second set of symbols. In some embodiments, the subset of symbols includes all the symbols in the first set except those within the first time interval.

[0039] In some embodiments, the subset of symbols includes all symbols in the first group except those in the second time interval. In some embodiments, the second time interval is between the last symbol of CORESET and the first symbol (e.g., the earliest symbol) of the second group of symbols. In some embodiments, transceiver 13 adjusts the first transmission when a first condition is met. In some embodiments, the first condition includes that the first transmission has the same or lower priority than the second transmission. In some embodiments, that the first transmission has the same or lower priority than the second transmission includes at least one of the following: the channel access priority level (p) associated with the first transmission is greater than or equal to the channel access priority level (p) associated with the second transmission, wherein the channel access priority level (p) is given in Table 1, and it is assumed that the channel access priority level associated with the configured transmission or scheduled transmission is known to transceiver 13; and the priority of the channel access type associated with the second transmission is higher than or equal to the priority of the channel access type associated with the first transmission. In some implementations, the priority of the channel access type includes at least one of the following: Type 1 channel access has a lower priority than Type 2A, Type 2B, or Type 2C channel access; Type 2A channel access has a lower priority than Type 2B channel access; Type 2B channel access has a lower priority than Type 2C channel access; or Type 2A, Type 2B, and Type 2C channel access have the same priority.

[0040] In some embodiments, the subset of symbols includes all of the first group of symbols except those within the third time interval. In some embodiments, the third time interval is between the last symbol of CORESET and the reference symbol. In some embodiments, the reference symbol precedes the first symbol of the second group of symbols by X symbols. In some embodiments, X symbols correspond to the sensing interval used to perform the channel access procedure. In some embodiments, the channel access procedure includes at least one of the following: a type 1 channel access procedure; a type 2A channel access procedure; a type 2B channel access procedure; or a type 2C channel access procedure, wherein type 1, type 2A, type 2B, and type 2C are different types of channel access procedures and include different channel access sensing intervals. In some embodiments, the channel access procedure is performed for a second transmission. In some embodiments, the value of X corresponds to the symbol duration and / or the channel access sensing interval. In some embodiments, the channel access sensing interval includes at least one of the following: a sensing interval for type 1 channel access (or may be a random or non-deterministic interval) associated with a priority level used to perform the type 1 channel access procedure. The channel access priority level is associated with the second transmission; 25µs; 16µs; or [0, 16)µs. In some implementations, the value of X includes at least one of the following: the smallest integer such that 0 ≤ X*L - 25us ≤ L, meaning the duration of X symbols should be less than or equal to the duration of one symbol plus 25us, and the duration of X symbols should be greater than or equal to 25us; or the smallest integer such that 0 ≤ X*L - 16us ≤ L, where L includes the symbol duration, meaning the duration of X symbols should be less than or equal to the duration of one symbol plus 16us, and the duration of X symbols should be greater than or equal to 16us; "us" represents microseconds. The following also applies. The design principle is to allow sufficient gaps for the UE to perform channel access before the second transmission. If the UE does not cancel the first transmission on X symbols, the UE cannot perform the channel access procedure. Ultimately, the UE cannot transmit the second transmission. The value of X is chosen to ensure sufficient channel access time, in which case X symbols should be at least greater than or equal to the channel access sensing interval. The sensing interval for Type 2A channel access is 25us, and the sensing interval for Type 2B channel access is 16us. Therefore, the duration of X symbols, i.e., the duration of X symbols (X*L), should be at least greater than or equal to the channel access sensing interval, i.e., 25µs or 16µs, depending on the channel access type. At the same time, the number of X symbols should not be too large, otherwise it will lead to severe cancellation of the first transmission. In our invention, we set that the remaining interval of X symbols after removing the channel access sensing interval should not exceed the duration of one symbol, i.e., the duration of X symbols (X*L) minus the duration of the channel access sensing interval being less than or equal to the duration of one symbol (L).This strikes a good balance between maintaining maximum first transmission and ensuring second transmission. In some embodiments, transceiver 13 adjusts the first transmission when a second condition is met. In some embodiments, the second condition includes not meeting the first condition and / or the channel access type associated with the second transmission being type 2A, type 2B, or type 2C.

[0041] In some embodiments, adjusting the first transmission includes completing or not canceling the first transmission on the first set of symbols. In some embodiments, transceiver 13 adjusts the first transmission when a third condition is met. In some embodiments, the third condition includes a fourth time interval less than the channel access sensing interval associated with the second transmission. In some embodiments, the fourth time interval includes the interval between the end of the first time interval and the beginning of the second set of symbols.

[0042] In some implementations, the first transmission includes at least one of the following: a physical uplink shared channel (PUSCH); a physical uplink control channel (PUCCH); a sounding reference signal (SRS); or a physical random access channel (PRACH). In some implementations, the second transmission includes at least one of the following: PUSCH; PUCCH; SRS; or PRACH.

[0043] Figure 2 The illustration shows a communication method 200 for a UE according to one embodiment of this disclosure. In some embodiments, method 200 includes: block 202, configured by a base station to transmit a first transmission on a first set of symbols in the time domain; block 204, configured by a base station to transmit a second transmission on a second set of symbols in the time domain; and block 206, adjusting the first transmission. This can address problems in the prior art, can determine the priority of transmissions, and can further determine the priority in a shared spectrum system.

[0044] In some implementations, the UE can adjust the first transmission. In some implementations, the second transmission is scheduled by downlink control information (DCI). In some implementations, the DCI includes at least one of the following formats: format 0_0; format 0_1; format 0_2; format 1_0; format 1_1; or format 1_2. In some implementations, the DCI is detected by the UE in the CORESET. In some implementations, the first set of symbols and the second set of symbols are consecutive in the time domain. In some implementations, the first set of symbols and the second set of symbols completely overlap or partially overlap in the time domain. In some implementations, the first set of symbols begins earlier than the second set of symbols in the time domain. In some implementations, the first set of symbols begins later than the last symbol of the CORESET in the time domain. In some implementations, at least one symbol in the first set of symbols is within a first time interval. In some implementations, the first time interval includes a duration and a start position. In some implementations, the start position includes the last symbol of the CORESET. In some implementations, the duration includes a certain number of symbols. In some implementations, the duration is predefined and / or preconfigured. In some implementations, the duration corresponds to the preparation time for the second transmission. In some embodiments, adjusting the first transmission includes canceling the first transmission on a subset of symbols of the first group of symbols. In some embodiments, the determination of the subset of symbols corresponds to at least one of the following: the position of CORESET; the position of the first group of symbols; or the position of the second group of symbols. In some embodiments, the subset of symbols includes all symbols of the first group except those within the first time interval.

[0045] In some implementations, the subset of symbols includes all symbols in the first group except those in the second time interval. In some implementations, the second time interval is between the last symbol of CORESET and the first symbol (e.g., the earliest symbol) of the second group of symbols. In some implementations, the UE adjusts the first transmission when a first condition is met. In some implementations, the first condition includes that the first transmission has the same or lower priority than the second transmission. In some implementations, having the same or lower priority as the second transmission includes at least one of the following: the channel access priority level (p) associated with the first transmission is greater than or equal to the channel access priority level (p) associated with the second transmission, wherein the channel access priority level (p) is given in Table 1, and it is assumed that the channel access priority level associated with the configured or scheduled transmission is known to the UE; and the priority of the channel access type associated with the second transmission is higher than or equal to the priority of the channel access type associated with the first transmission. In some implementations, the priority of the channel access type includes at least one of the following: Type 1 channel access has a lower priority than Type 2A, Type 2B, or Type 2C channel access; Type 2A channel access has a lower priority than Type 2B channel access; Type 2B channel access has a lower priority than Type 2C channel access; or Type 2A, Type 2B, and Type 2C channel access have the same priority.

[0046] In some embodiments, the subset of symbols includes all of the first group of symbols except those within the third time interval. In some embodiments, the third time interval is between the last symbol of the CORESET and the reference symbol. In some embodiments, the reference symbol precedes the first symbol of the second group of symbols by X symbols. In some embodiments, X symbols correspond to the time interval used to perform the channel access procedure. In some embodiments, the channel access procedure includes at least one of the following: a type 1 channel access procedure; a type 2A channel access procedure; a type 2B channel access procedure; or a type 2C channel access procedure, wherein type 1, type 2A, type 2B, and type 2C are different types of channel access procedures and include different channel access sensing intervals. In some embodiments, the channel access procedure is performed for a second transmission. In some embodiments, the value of X corresponds to the symbol duration and / or the channel access sensing interval. In some embodiments, the channel access sensing interval includes at least one of the following: a sensing interval for type 1 channel access (or may be a random interval) associated with a priority level used to perform the type 1 channel access procedure. The channel access priority level is associated with the second transmission; 25µs; 16µs; or [0, 16)µs. In some implementations, the value of X includes at least one of the following: the smallest integer such that 0 ≤ X*L - 25us ≤ L, meaning the duration of X symbols should be less than or equal to the duration of one symbol plus 25us, and the duration of X symbols should be greater than or equal to 25us; or the smallest integer such that 0 ≤ X*L - 16us ≤ L, where L includes the symbol duration, meaning the duration of X symbols should be less than or equal to the duration of one symbol plus 16us, and the duration of X symbols should be greater than or equal to 16us; "us" represents microseconds. The following also applies. The design principle is to allow sufficient gaps for the UE to perform channel access before the second transmission. If the UE does not cancel the first transmission on X symbols, the UE cannot perform the channel access procedure. Ultimately, the UE cannot transmit the second transmission. The value of X is chosen to ensure sufficient channel access time, in which case X symbols should be at least greater than or equal to the channel access sensing interval. The sensing interval for Type 2A channel access is 25us, and the sensing interval for Type 2B channel access is 16us. Therefore, the duration of X symbols, i.e., the duration of X symbols (X*L), should be at least greater than or equal to the channel access sensing interval, i.e., 25µs or 16µs, depending on the channel access type. At the same time, the number of X symbols should not be too large, otherwise it will lead to severe cancellation of the first transmission. In our invention, we set that the remaining interval of X symbols after removing the channel access sensing interval should not exceed the duration of one symbol, i.e., the duration of X symbols (X*L) minus the duration of the channel access sensing interval being less than or equal to the duration of one symbol (L).This strikes a good balance between maintaining maximum first transmission and ensuring second transmission. In some implementations, the UE adjusts the first transmission when a second condition is met. In some implementations, the second condition includes not meeting the first condition and / or the channel access type associated with the second transmission being type 2A, type 2B, or type 2C.

[0047] In some implementations, adjusting the first transmission includes completing or not canceling the first transmission on the first set of symbols. In some implementations, the UE adjusts the first transmission when a condition is met. In some implementations, the third condition includes a fourth time interval less than the channel access sensing interval associated with the second transmission. In some implementations, the priority level value p corresponds to the transmission priority and is known to the UE. In some implementations, the fourth time interval includes the interval between the end of the first time interval and the beginning of the second set of symbols.

[0048] In some implementations, the first transmission includes at least one of the following: Physical Uplink Shared Channel (PUSCH); Physical Uplink Control Channel (PUCCH); Sound Reference Signal (SRS); or Physical Random Access Channel (PRACH). In some implementations, the second transmission includes at least one of the following: PUSCH; PUCCH; SRS; or PRACH.

[0049] In some implementations, for a UE, if a first set of symbols is configured to transmit a first transmission, wherein the first transmission includes at least one of the following: PUSCH, PUCCH, SRS, or PRACH, the UE will first perform a channel access procedure to access the channel for which the first transmission is performed. The channel access procedure includes different types, namely Type 1, or Type 2A, Type 2B, or Type 2C. Type 1 channel access has a random sensing interval, i.e., the time interval spanned by the sensing time slot is random, corresponding to the channel access priority level (p) of the transmission. In our invention, if the UE performs a Type 1 channel access procedure for the first transmission, we assume that the channel access priority level (p) of the first transmission is known to the UE, and if the UE performs a Type 1 channel access procedure for the second transmission, then the channel access priority level (p) of the second transmission is known to the UE.

[0050] In some implementations, Table 1 is provided, which shows the different channel access priority levels (p) for transmission.

[0051] Table 1:

[0052]

[0053] Type 2 channel access procedures have deterministic sensing intervals, meaning the time interval spanned by a sensing time slot is deterministic. Furthermore, the time interval for Type 2A is at least 25 µs, for Type 2B it is 16 µs, and for Type 2C it is at most 16 µs.

[0054] Example:

[0055] Figure 3 The illustration shows that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission partially or completely overlap in the time domain. Figure 4 The illustration shows that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission are continuous in the time domain. Figure 3 and Figure 4 The illustration shows that in some implementations, for a UE, if a set of symbols is configured to transmit a first transmission, wherein the first transmission is at least one of the following: PUSCH, PUCCH, SRS, or PRACH, the UE will first perform a channel access procedure to access the channel for which the first transmission is performed. When the UE detects a DCI format 1_0, 1_1, 0_1, or 0_0 for scheduling a second transmission, wherein the second transmission is at least one of the following: PUSCH, PUCCH, SRS, or PRACH, and the resources used for the first transmission and the resources used for the second transmission are completely or partially overlapping, for example, as shown in the figure. Figure 3 Or it is continuous in the time domain, for example... Figure 4 .

[0056] Figure 5 The illustration shows that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission partially or completely overlap in the time domain. Figure 6 The illustration shows that, according to one embodiment of the present disclosure, resources (e.g., a first set of symbols) for a first transmission and resources (e.g., a second set of symbols) for a second transmission are continuous in the time domain. Figure 5 and Figure 6 The illustration shows that in some implementations, two time intervals are provided, i.e., as shown in the figure. Figure 5 and Figure 6The illustration shows a first time interval and a second time interval, wherein the second time interval includes the duration between the last symbol of the DCI-formatted CORESET detected by the UE and the first symbol of the second transmission. The first time interval is related to the processing time for the UE to decode the detected DCI and / or prepare for the second transmission. The first time interval begins when the UE detects the last symbol of the DCI-formatted CORESET. The first time interval is predefined in the specification. Optionally, the first time interval is measured in the number of symbols, which is predefined in the specification or preconfigured via radio resource control (RRC) configuration. In this case, the UE will adjust the first transmission to behave differently as illustrated in the example below.

[0057] Figure 7 and Figure 8 The illustration depicts behavior 1, which includes: the UE not canceling the first transmission on a subset of symbols of the first group of symbols within a second time interval, but canceling the first transmission on the remaining symbols outside the second time interval. Optionally, this behavior is advantageous in specific situations where the UE has already accessed a channel for transmitting the first transmission during the second time interval, and ideally, the UE can continue transmitting the second transmission from the first symbol of the second group of symbols. Thus, the UE does not need to re-execute the channel access procedure. This scheme can reduce the probability of second transmission channel access failure. Furthermore, the condition allowing the UE to continue transmitting the second transmission without re-executing the channel access procedure is that the first transmission has the same priority as or a lower priority than the second transmission. Optionally, the first transmission having the same priority as or a lower priority than the second transmission includes at least one of the following: the channel access priority level (p) associated with the first transmission is greater than or equal to the channel access priority level (p) associated with the second transmission, the channel access priority levels (p) are given in Table 1, and it is assumed that the channel access priority level associated with the configured or scheduled transmission is known to the UE; the priority of the channel access type associated with the second transmission is higher than or equal to the priority of the channel access type associated with the first transmission. Optionally, the priority of the channel access type includes at least one of the following: Type 1 channel access has a lower priority than Type 2A, Type 2B, or Type 2C channel access; Type 2A channel access has a lower priority than Type 2B channel access; Type 2B channel access has a lower priority than Type 2C channel access; or Type 2A, Type 2B, and Type 2C channel access have the same priority.

[0058] Alternatively, Figure 9 and Figure 10Action 2 is illustrated, which includes: the UE not canceling the first transmission on a subset of symbols of the first group of symbols within the first time interval, but canceling the first transmission on the remaining symbols outside the first time interval. Optionally, if the UE cannot continue transmitting the second transmission due to a constraint requiring the re-execution of the channel access procedure for the second transmission, the UE should perform action 2. This constraint might be due to, for example, the failure to meet the priority conditions described above. In this case, the UE will cancel part of the first transmission, allowing sufficient time for the UE to re-execute the channel access procedure. The canceled portion is determined by the first time interval. Since the UE will need some time to decode the DCI to know that a scheduled second transmission exists, the UE will only cancel the first transmission outside the first time interval. This processing time is covered by the first time interval.

[0059] Alternatively, Figure 11 and Figure 12 The illustration illustrates behavior 3, which includes: the UE continuing to transmit the first transmission on a subset of symbols within the first set of symbols during the third time interval, and canceling transmissions on the remaining symbols outside the third time interval, wherein the third time interval begins with the last symbol in which the UE detects the CORESET of the DCI and ends X symbols before the start of the second transmission, as shown. Figure 11 and Figure 12 As illustrated, the value of X depends on channel access type 2A, 2B, or 2C. Optionally, the UE will perform action 3 when a second condition is met: whether the UE will perform a type 2 channel access procedure for the second transmission, where type 2 includes channel access type 2A, type 2B, or type 2C. In this method, the value of X depends on the channel access type, i.e., type 2A, type 2B, or type 2C.

[0060] For Type 2A, X is the smallest integer such that 0 ≤ X*L - 25us ≤ L, where L is the orthogonal frequency division multiplexing (OFDM) symbol duration. The value of L depends on the subcarrier spacing. For Type 2B, X is the smallest integer such that 0 ≤ X*L - 16us ≤ L, where L is the OFDM symbol duration. The value of L depends on the subcarrier spacing. For Type 2C, X is the smallest integer such that 0 ≤ X*L - 16us ≤ L, where L is the OFDM symbol duration. The value of L depends on the subcarrier spacing. “us” represents microseconds. The same applies below. The design principle is to allow sufficient gap for the UE to perform channel access before the second transmission. If the UE does not cancel the first transmission on X symbols, the UE cannot perform the channel access procedure. Ultimately, the UE cannot transmit the second transmission. The value of X is chosen to ensure sufficient channel access time, in which case X symbols should be at least greater than or equal to the channel access sensing interval. The sensing interval for Type 2A channel access is 25us, and the sensing interval for Type 2B channel access is 16us. Therefore, the duration of X symbols, i.e., X*L, should be at least greater than or equal to the channel access sensing interval, i.e., 25µs or 16µs, depending on the channel access type. Simultaneously, X symbols should not be too large, as this would lead to significant cancellation of the first transmission. In our invention, we set the remaining X symbol interval after removing the channel access sensing interval to not exceed the duration of one symbol, i.e., the duration of X symbols (X*L) minus the channel access sensing interval being less than or equal to the duration of one symbol (L). This strikes a good balance between maintaining maximum first transmission and ensuring second transmission.

[0061] Alternatively, Figure 13 and Figure 14 The diagram illustrates behavior 4, which includes: the UE completing or not canceling in such a case. Figure 13 and Figure 14The first transmission on the illustrated symbol group. This behavior ensures good transmission quality for the first transmission. Optionally, the UE can perform this behavior when a third condition is met, where the third condition is whether the fourth time interval is less than the sensing interval, where the fourth time interval includes the duration between the end of the first time interval and the start of the second transmission. The sensing interval is the channel access procedure sensing interval, which is randomly determined for type 1 channel access and deterministic for type 2 channel access (including type 2A, type 2B, or type 2C). Meeting the third condition means that the UE can complete the channel access procedure within the fourth time interval or not cancel it. If the third condition is not met, it means that the UE cannot complete the channel access procedure within the fourth time interval, and therefore it also means that the second transmission cannot be transmitted if the channel access procedure is not completed. In this case, it is beneficial for the UE to at least complete the first transmission.

[0062] Some implementations offer the following commercial benefits: 1. Solving problems in the prior art. 2. Determining priority for transmission. 3. Determining priority in shared spectrum systems. 4. Providing good communication performance. 5. Providing high reliability. 6. Some implementations of this disclosure are intended for 5G-NR chipset suppliers, V2X communication system development suppliers, automotive manufacturers (including cars, trains, trucks, buses, bicycles, motorcycles, helmets, etc.), drones (unmanned aerial vehicles), smartphone manufacturers, communication equipment for public safety, and AR / VR device manufacturers for purposes such as gaming, conferences / seminars, and education. Some implementations of this disclosure are combinations of "technologies / processes" that can be adopted in 3GPP specifications to create the final product. Some implementations of this disclosure can be adopted in 5G NR unlicensed frequency band communications. Some implementations of this disclosure propose technical mechanisms.

[0063] Figure 15 This is a block diagram of an example system 700 for wireless communication according to one embodiment of this disclosure. The embodiment described herein can be implemented into the system using any appropriately configured hardware and / or software. Figure 15 The illustration shows a system 700, including radio frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory / reservoir 740, display 750, camera 760, sensor 770, and input / output (I / O) interface 780, all coupled to each other at least as illustrated. The application circuitry 730 may include, for example, but not limited to, circuitry of one or more single-core or multi-core processors. The processor may include any combination of general-purpose and special-purpose processors, such as a graphics processor or application processor. The processor may be coupled to memory / reservoir and configured to execute instructions stored in memory / reservoir to enable various applications and / or operating systems running on the system.

[0064] The baseband circuit 720 may include, for example, but not limited to, circuitry of one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuit can handle various radio control functions that enable communication with one or more radio networks via RF circuitry. Radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuit can provide communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuit can support communication with the evolved universal terrestrial radio access network (EUTRAN) and / or other wireless metropolitan area networks (WMAN), wireless local area networks (WLAN), and wireless personal area networks (WPAN). Embodiments where the baseband circuit is configured to support radio communication using more than one wireless protocol may be referred to as multimode baseband circuitry.

[0065] In various embodiments, baseband circuit 720 may include circuitry that operates with a signal not strictly considered to be at a baseband frequency. For example, in some embodiments, the baseband circuitry may include circuitry that operates with a signal having an intermediate frequency (IF) between the baseband frequency and the radio frequency (RF). RF circuitry 710 may enable communication with a wireless network using modulated electromagnetic radiation via a non-solid-state medium. In various embodiments, RF circuitry may include switches, filters, amplifiers, etc., to facilitate communication with a wireless network. In various embodiments, RF circuitry 710 may include circuitry that operates with a signal not strictly considered to be at the radio frequency (RF). For example, in some embodiments, RF circuitry may include circuitry that operates with a signal having an intermediate frequency (IF) between the baseband frequency and the RF frequency.

[0066] In various implementations, the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to user equipment, eNB, or gNB may be wholly or partially embodied in one or more of the RF circuitry, baseband circuitry, and / or application circuitry. As used herein, “circuit” may refer to, be part of, or include one or more of the following: application-specific integrated circuits (ASICs), electronic circuitry, processors (shared, dedicated, or grouped), and / or memories (shared, dedicated, or grouped) capable of executing software or firmware programs, combinational logic circuitry, and / or other suitable hardware components that provide the aforementioned functionality. In some implementations, electronic device circuitry may be implemented in or associated with circuitry that may be implemented by one or more software or firmware modules. In some implementations, some or all of the components of the baseband circuitry, application circuitry, and / or memory / storage may be implemented together on a system on a chip (SOC). Memory / storage 740 may be used, for example, to load and store data and / or instructions for the system. Memory / storage for one implementation may include any combination of suitable volatile memory (e.g., dynamic random access memory (DRAM)) and / or non-volatile memory (e.g., flash memory).

[0067] In various embodiments, I / O interface 780 may include one or more user interfaces designed to enable a user to interact with the system, and / or peripheral component interfaces designed to enable peripheral components to interact with the system. User interfaces may include, but are not limited to, physical keyboards or keypads, touchpads, speakers, microphones, etc. Peripheral component interfaces may include, but are not limited to, non-volatile memory ports, universal serial bus (USB) ports, audio jacks, and power interfaces. In various embodiments, sensor 770 may include one or more sensing devices to determine environmental conditions and / or location information relevant to the system. In some embodiments, sensors may include, but are not limited to, gyroscope sensors, accelerometers, proximity sensors, ambient light sensors, and positioning units. Positioning units may also be part of or interact with baseband and / or RF circuitry to communicate with components of a positioning network, such as Global Positioning System (GPS) satellites.

[0068] In various embodiments, display 750 may include displays such as liquid crystal displays and touchscreen displays. In various embodiments, system 700 may be a mobile computing device, such as, but not limited to, laptops, tablets, netbooks, ultrabooks, smartphones, AR / VR glasses, etc. In various embodiments, the system may have more or fewer components and / or different architectures. Where appropriate, the methods described herein may be implemented as computer programs. Computer programs may be stored on storage media such as non-transitory storage media.

[0069] Those skilled in the art will understand that each unit, algorithm, and step described and disclosed in the embodiments of this disclosure is implemented using electronic hardware or a combination of computer software and electronic hardware. Whether a function operates in hardware or software depends on the state of the application and the design requirements of the technical solution. Those skilled in the art can implement the functions for each specific application in different ways, but such implementations should not exceed the scope of this disclosure. Those skilled in the art will understand that since the above systems, devices, and units are substantially the same, they can refer to the workflow of the systems, devices, and units in the above embodiments. For ease of description and simplicity, these workflows will not be described in detail.

[0070] It is understood that the systems, devices, and methods disclosed in the embodiments of this disclosure can be implemented in other ways. The above embodiments are merely exemplary. The division of units is based solely on logical function; other divisions exist in the implementation. Multiple units or components can be combined or integrated into another system. It is also possible to omit or skip certain features. On the other hand, the mutual coupling, direct coupling, or communication coupling shown or discussed may operate indirectly or communicatively through some ports, devices, or units, whether by electrical, mechanical, or other means.

[0071] The units used for explanation may be physically separate or not. The units used for display may be physical units or not, i.e., located in one place or distributed across multiple network units. Some or all of the units may be used depending on the purpose of the implementation. Furthermore, the various functional units in different implementations may be integrated into a single processing unit, physically independent, or integrated into a single processing unit by two or more units.

[0072] If software functional units are implemented, used, and sold as products, they can be stored in a readable storage medium within a computer. Based on this understanding, the technical solutions proposed in this disclosure can be implemented substantially or partially in the form of a software product. Alternatively, a portion of a technical solution advantageous to conventional technology can be implemented as a software product. The software product in the computer is stored in a storage medium, including multiple commands for a computing device (e.g., a personal computer, server, or network device) to execute all or part of the steps disclosed in the embodiments of this disclosure. Storage media include USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), floppy disks, or other types of media capable of storing program code.

[0073] Although this disclosure has been described in conjunction with what are considered to be the most practical and preferred embodiments, it should be understood that this disclosure is not limited to the disclosed embodiments, but is intended to cover various arrangements made without departing from the broadest interpretation of the appended claims.

Claims

1. A transmission method of a user equipment UE in a shared spectrum, the method comprising: configured by a base station to transmit a first transmission on a first set of symbols in the time domain; being scheduled by the base station to transmit a second transmission on a second group of symbols in the time domain, wherein the second transmission is scheduled by downlink control information DCI, and the DCI is detected by the UE in a control resource set CORESET; and The first transmission is adjusted by canceling the first transmission on a subset symbol of the first group of symbols, wherein at least one symbol of the first group of symbols is within a first time interval, the first time interval includes a duration and a starting position, the starting position includes a last symbol of the CORESET, the duration corresponds to a preparation time for the second transmission, and wherein the subset symbols include all of the first group of symbols except the symbols within the first time interval.

2. The method according to claim 1, wherein: The second transmission comprises an uplink transmission.

3. The method according to claim 2, wherein: The first group of symbols and the second group of symbols are consecutive in the time domain, and the first group of symbols starts earlier than the second group of symbols in the time domain.

4. The method according to any one of claims 1 to 3, wherein: The duration is predefined and / or preconfigured.

5. The method according to any one of claims 1 to 3, wherein: The UE adjusts the first transmission when a condition is not met.

6. The method according to claim 5, wherein: The conditions include at least one of the following: The channel access priority level p of the second transmission is less than or equal to the channel access priority level p of the first transmission; The priority of the channel access type of the second transmission is higher than or equal to the priority of the channel access type of the first transmission; For the second transmission, the UE needs to perform a type 2 channel access procedure; or The fourth time interval is smaller than the channel access sensing interval.

7. The method according to any one of claims 1 to 3, wherein: The second transmission includes at least one of the following: Physical uplink shared channel PUSCH; Physical uplink control channel PUCCH; Sounding Reference Signal SRS; or Physical Random Access Channel PRACH.

8. A user equipment UE, the UE comprising: memory for storing computer programs; Transceiver; as well as a processor coupled to the memory and the transceiver, the processor being configured to execute the computer program to: configured by a base station to transmit a first transmission on a first set of symbols in the time domain; being scheduled by the base station to transmit a second transmission on a second group of symbols in the time domain, wherein the second transmission is scheduled by downlink control information DCI, and the DCI is detected by the UE in a control resource set CORESET; and The first transmission is adjusted by canceling the first transmission on a subset symbol of the first group of symbols, wherein at least one symbol of the first group of symbols is within a first time interval, the first time interval includes a duration and a starting position, the starting position includes a last symbol of the CORESET, the duration corresponds to a preparation time for the second transmission, and wherein the subset symbols include all of the first group of symbols except the symbols within the first time interval.

9. The UE according to claim 8, wherein: The second transmission comprises an uplink transmission.

10. The UE according to claim 8, wherein: The first group of symbols and the second group of symbols are consecutive in the time domain, and the first group of symbols starts earlier than the second group of symbols in the time domain.

11. The UE according to any one of claims 8 to 10, wherein: The duration is predefined and / or preconfigured.

12. The UE according to any one of claims 8 to 10, wherein: The UE adjusts the first transmission when a condition is not met.

13. The UE according to claim 12, wherein: The conditions include at least one of the following: The channel access priority level p of the second transmission is less than or equal to the channel access priority level p of the first transmission; The priority of the channel access type of the second transmission is higher than or equal to the priority of the channel access type of the first transmission; For the second transmission, the UE needs to perform a type 2 channel access procedure; or The fourth time interval is smaller than the channel access sensing interval.

14. A computer-readable storage medium having a computer program stored therein, wherein the computer program enables a computer to execute the method according to any one of claims 1 to 7.

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