CN107889264B

CN107889264B - Uplink transmission method and device

Info

Publication number: CN107889264B
Application number: CN201610879123.6A
Authority: CN
Inventors: 庞继勇; 朱俊; 张佳胤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-09-30
Filing date: 2016-09-30
Publication date: 2020-10-16
Anticipated expiration: 2036-09-30
Also published as: WO2018059188A1; CN107889264A

Abstract

The invention discloses an uplink transmission method and equipment, which are used for solving the problems that in the future 5G NR, if uplink transmission is still realized by adopting an explicit uplink scheduling mode, signaling overhead is increased and spectrum efficiency is reduced. The method comprises the following steps: the UE obtains the configuration information of the UGFT window configured for the UE or the UE group where the UE is located on the network side according to the configuration signaling; the UE determines the position of the UGFT window according to the configuration information of the UGFT window; and the UE carries out uplink transmission on the UGFT resource units contained in the UGFT window, wherein the UGFT window comprises N continuous UGFT resource units in time. Because uplink transmission of the UE or the UE group is scheduled only by configuring signaling, the authorization-free uplink transmission of the UE in the UGFT window configured by the UE or the UE group where the UE is located is realized, the signaling overhead is reduced, the interaction time delay is reduced, and the spectrum efficiency is improved.

Description

Uplink transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an uplink transmission method and apparatus.

Background

In a cellular communication network/system, such as a Long Term Evolution (LTE) system based on the third generation partnership Project (3 GPP), uplink transmission of a User equipment (UE; also called User Terminal, or User Station) is centrally controlled by a base Station (Node B or eNB), that is, resources occupied by the uplink transmission and Modulation and Coding Schemes (MCS) and the like are determined and notified to the UE by the base Station, and in the LTE system, uplink scheduling information of the UE is included in uplink scheduling (UL) information in a Physical Downlink Control Channel (PDCCH) of each subframe, and the UE can only initiate uplink transmission on the resources specified by the eNB. Through the instruction explicit uplink scheduling, the UE does not need to select uplink transmission resources by self, and the uplink transmission among a plurality of UEs is orthogonal through the resources, so that collision/collision does not occur.

However, such mandatory explicit uplink scheduling requires a large amount of control signaling interaction, thereby causing a reduction in spectrum efficiency due to signaling overhead and a transmission delay due to signaling interaction. In the New Radio (NR) of the fifth generation (5th-generation, 5G) in the future, two types of services, Massive internet of things Communication (mtc) and ultra-Reliable and Low-Latency Communication (urrllc) need to be supported. Obviously, for the mtc service, if uplink transmission is still performed based on the explicit uplink scheduling method, a dramatic signaling overhead is consumed, which greatly reduces the spectrum efficiency; for the urrllc service, if uplink transmission is still performed based on an explicit uplink scheduling mode, a long signaling interaction delay is introduced, and the requirement of the urrllc for ultra-low delay cannot be met.

In summary, in the future 5G NR, if the uplink transmission is still implemented by using an explicit uplink scheduling, the signaling overhead is increased, the spectrum efficiency is reduced, and a longer signaling interaction delay is introduced.

Disclosure of Invention

The embodiment of the invention provides an uplink transmission method and equipment, which are used for solving the problems that in the future 5G NR, if uplink transmission is realized by adopting an explicit uplink scheduling mode, signaling overhead is increased, spectrum efficiency is reduced, and long signaling interaction time delay is introduced.

In a first aspect, a method for uplink transmission on a UE side is provided, where the method includes:

the UE obtains the configuration information of the UGFT window configured for the UE or the UE group where the UE is located on the network side according to the configuration signaling;

the UE determines the position of the UGFT window according to the configuration information of the UGFT window;

and the UE carries out uplink transmission on UGFT resource units contained in the UGFT window, the UGFT window contains N continuous UGFT resource units in time, and N is a positive integer.

In the embodiment of the invention, the uplink transmission of the UE or the UE group is scheduled only by configuring the signaling, so that the authorization-free uplink transmission of the UE in the UGFT window configured by the UE or the UE group where the UE is located is realized, and the uplink transmission of the UE in the UGFT window configured by the UE or the UE group where the UE is located is realized in an authorization-free manner, so that the signaling overhead is reduced, the interaction time delay is reduced, and the spectrum efficiency is improved.

Wherein the configuration information comprises: a period of the UGFT window, and/or an offset of the UGFT window within the period.

Optionally, the configuration information further includes: a number of UGFT resource units included in the UGFT window.

In the embodiment of the present invention, the period of the UGFT window, the offset of the UGFT window in the period, and the number of UGFT resource units included in the UGFT window may be sent through one signaling, or may be sent through different signaling. The signaling may be L1 (layer 1 physical layer) signaling, L2 (layer 2 data link layer) signaling, L3 (higher layer) signaling, and/or a broadcast message, among others.

In one possible embodiment, the performing, by the UE, uplink transmission on the UGFT resource unit included in the UGFT window includes:

the UE randomly selects K UGFT resource units from N UGFT resource units in the UGFT window and performs uplink transmission on the K UGFT resource units, wherein K belongs to [1, N '], N' is a positive integer less than N, and different UEs all randomly select different numbers of UGFT resource units to perform uplink transmission, so that transmission conflicts of multiple users in time-frequency positions are reduced; or

And the UE selects a random number L from the [1, N' ], uplink transmission is carried out on the L UGFT resource units in the UGFT window, and different UEs all randomly select different numbers of UGFT resource units to carry out uplink transmission, so that transmission conflicts of multiple users on time-frequency positions are reduced.

Further, the configuration information further includes N' configured for the UE by the network side.

In one possible embodiment, the performing, by the UE, uplink transmission on L UGFT resource units in the UGFT window includes:

the UE randomly selects one UGFT resource unit from the UGFT resource units contained in the UGFT window as an initial position of uplink transmission to perform the uplink transmission; or

The UE randomly selects one UGFT resource unit from the UGFT resource units contained in the UGFT window to perform monitoring and then send the LBT, and performs uplink transmission on the UGFT resource unit where the LBT succeeds or the subsequent UGFT resource units; or

And the UE randomly selects a backoff number M, executes LBT from the first UGFT resource unit contained in the UGFT window, and performs uplink transmission on the UGFT resource unit where the LBT is successfully completed for the Mth time or the subsequent UGFT resource unit, wherein M is more than or equal to 1 and less than or equal to N.

Further, if the backoff number in the current UGFT window is not backed off to 0, the UE performs uplink transmission on the UGFT resource unit where the LBT is successfully completed for the mth time or on a subsequent UGFT resource unit, including:

the UE suspends back-off after the current UGFT window is finished; and

and after the next UGFT window arrives, the UE starts back-off by the back-off number when the back-off is suspended from the first UGFT resource unit of the next UGFT window.

Based on any of the above embodiments, the performing, by the UE, uplink transmission on the UGFT resource unit included in the UGFT window includes:

the UE executes LBT in a reserved time interval before the UGFT resource unit, and performs uplink transmission on the UGFT resource unit after the LBT succeeds; or

And the UE executes LBT in the reserved time interval in the UGFT resource unit, and performs uplink transmission on the UGFT resource unit after the LBT is successful.

Based on any of the above embodiments, in order to avoid that the UE is in a state of waiting for receiving ACK/NACK for a long time after transmission, it is necessary to constrain a specific time for the network side to feed back ACK/NACK, specifically, after the UE performs uplink transmission on a UGFT resource unit included in the UGFT window, the method further includes:

and the UE receives ACK/NACK replied by the network side in an ACK/NACK window corresponding to the UGFT window.

The starting time of the ACK/NACK window is the starting time or the ending time of any UGFT window; or the starting time of the ACK/NACK window is the ending time of any UGFT resource unit; or the starting time of the ACK/NACK window is the time of a set time interval after the ending time of any UGFT resource unit.

Further, if the UE receives NACK information replied by the network side within the ACK/NACK window or does not receive any reply by the network side, the method further includes:

the UE retransmits on the UGFT resource unit behind the ACK/NACK window;

or

And the UE retransmits on the UGFT resource unit contained in the next UGFT window after the ACK/NACK window.

In a possible embodiment, after the UE performs uplink transmission on the UGFT resource units included in the UGFT window, the method further includes:

the UE receives a scheduling signaling for retransmission sent by a network side;

and the UE retransmits the resource units scheduled by the scheduling signaling.

Optionally, the resource unit indicated by the scheduling signaling is a non-UGFT resource unit.

In a second aspect, a method for performing LBT is provided, comprising:

the UE determines the position of a reserved time interval for LBT, wherein the reserved time interval can be before or in the UGFT resource unit;

and the UE performs LBT on the determined position.

In the embodiment of the invention, the UE determines the position of the reserved time interval for LBT and carries out LBT on the determined position. The reserved time interval can be before the UGFT resource unit or in the UGFT resource unit, so that the problem that the unlicensed transmission on the licensed spectrum cannot be directly applied to the unlicensed spectrum is solved.

The UGFT resource unit may be any UGFT resource unit within the UGFT window, and the description of the UGFT window refers to the description in the first aspect.

Wherein the method provided in the second aspect can be combined with any one of the method embodiments in the first aspect.

In a third aspect, a method for uplink transmission on a network side is provided, where the method includes:

the network side is a UGFT window configured for the UE or a UE group where the UE is located, the UGFT window comprises N UGFT resource units which are continuous in time, and N is a positive integer;

the network side sends the configured UGFT window configuration information to the UE;

and the network side receives the uplink transmission of the UE on the UGFT resource unit contained in the UGFT window.

For the configuration information, please refer to the related description in the first aspect, which is not described herein again.

In a possible implementation manner, the network side may send the configuration information of the configured UGFT window through L1 signaling, L2 signaling, L3 signaling, or a broadcast message.

In a possible embodiment, after receiving the uplink transmission of the UE on the UGFT resource unit included in the UGFT window, the network side further includes:

and the network side feeds back ACK/NACK to the UE in an ACK/NACK window corresponding to the UGFT window.

For the ACK/NACK window, please refer to the related description in the first aspect, which is not described herein again.

In a fourth aspect, a computer-readable storage medium is provided, in which executable program code is stored, the program code being adapted to implement the method of the first aspect.

In a fifth aspect, a computer-readable storage medium is provided, in which executable program code is stored, the program code being adapted to implement the method of the second aspect.

A sixth aspect provides a computer readable storage medium having stored therein executable program code for implementing the method of the third aspect.

In a seventh aspect, a user equipment is provided, which comprises means for performing the method in the first aspect and/or the second aspect.

In an eighth aspect, a network side device is provided, which includes means for performing the method in the third aspect.

In a ninth aspect, there is provided a user equipment comprising: a processor, a transceiver, and a memory, wherein: the processor reads the program in the memory and executes the method of the first aspect and/or the second aspect.

In a tenth aspect, a network-side device is provided, including: a processor, a transceiver, and a memory, wherein: the processor reads the program in the memory and executes the method of the third aspect.

Drawings

Fig. 1 is a schematic diagram of uplink grant and uplink grant-free transmission in an embodiment of the present invention;

fig. 2 is a schematic diagram of an uplink transmission method at a user equipment side in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a periodic centralized UGFT resource pool allocation in an embodiment of the present invention;

fig. 4 is a schematic diagram of a process of selecting a UGFT resource unit based on random backoff in an embodiment of the present invention;

fig. 5A is a schematic diagram illustrating an ACK/NACK window starting time being a starting time of any UGFT window in the embodiment of the present invention;

fig. 5B is a schematic diagram illustrating a start time of an ACK/NACK window in an embodiment of the present invention is an end time of any UGFT window;

FIG. 5C is a diagram illustrating a starting time of an ACK/NACK window at a time interval of a set duration after an ending time of any UGFT resource unit in the embodiment of the present invention;

FIG. 6 is a schematic diagram of a method of performing LBT in an embodiment of the present invention;

FIG. 7A is a schematic diagram of a reservation time interval before UGFT resource units in an embodiment of the present invention;

FIG. 7B is a diagram of a reserved time interval within a UGFT resource unit in an embodiment of the invention;

fig. 8 is a schematic diagram of an uplink transmission method on a network side according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a user equipment according to an embodiment of the present invention;

fig. 10 is a schematic diagram of another ue according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a network-side device according to an embodiment of the present invention;

fig. 12 is a schematic diagram of another network-side device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In embodiments of the present invention, a User Equipment (UE) may be a wireless terminal, which may be a device providing voice and/or data connectivity to a user, a handheld device having wireless connectivity, or other processing device connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with at least one core Network via a Radio Access Network (e.g., RAN). For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), a User Device (User Device), or a User Equipment (User Equipment).

The network side can be a base station or a wireless resource management device for controlling the base station, or can comprise the base station and the wireless resource management device for controlling the base station; wherein the base station can be a macro station or a small station, such as: small cell (small cell), pico cell (pico cell), etc., and the base station may also be a home base station, such as: home NodeB (HNB), Home evolved node B (Home eNodeB, HeNB), etc., and the base station may also include a relay node (relay), etc.

In the embodiment of the present invention, the unlicensed spectrum (also referred to as unlicensed spectrum or unlicensed spectrum) may be understood as a physical frequency band that is open to an indefinite number of independent users and can be directly used without registration or separate permission. For unlicensed spectrum, it can be used by any type of terminal device that complies with usage rules (e.g., maximum level value, bandwidth limitation, and duty cycle) without having to obtain a usage license in advance. The wide application of Industrial Scientific Medical (ISM) frequency band is an unlicensed physical frequency band that can be used by anyone without authorization;

licensed spectrum (also referred to as licensed or licensed spectrum) is a physical frequency band that needs to be obtained a dedicated usage right, license or license to use. Traditionally, the radio spectrum resources for cellular mobile communication are located in authorized physical frequency bands, wherein government communication regulatory bodies allocate the usage right of dedicated physical frequency bands for mobile communication basic network operators to provide mobile communication and broadband data access services.

In the future 5G NR, an uplink free scheduling (UL grant free) or a few uplink scheduling (UL grant less) transmission is proposed, which is referred to as UGFT, and the transmission based on the UL grant is referred to as UGT, and the UGFT enables uplink data transmission of "immediate-and-go" (arbitrary-and-go) by reducing or eliminating scheduling signaling of uplink transmission, where the upper half of fig. 1 represents UGT and the lower half represents UGFT. The main ideas of UGFT are: the resource pool of the UE or the UE group for uplink transmission is defined (or allocated) in advance (semi-statically or statically), and the UE or the UE group can directly initiate uplink transmission on any resource in the resource pool associated with the UE or the UE group without monitoring a dynamic scheduling signaling from a network side, so that explicit uplink scheduling is avoided. Of course, this also introduces a new problem, that is, multiple UEs allocated the same resource pool are likely to initiate uplink transmission on the same resource, thereby causing transmission collision or collision.

In the UGFT, although the UE can perform uplink transmission without an explicit UL grant, the UE needs to know a resource pool available for the UGFT in advance, and the resource pool is divided/allocated in advance by the network side and notified to the relevant UE, and adopts semi-static or static update/change. The embodiment of the invention provides a centralized periodical UGFT resource allocation mode and correspondingly provides required configuration signaling. It should be noted that the centralized resource refers to a resource division that is continuous in the time domain and does not involve other dimensions (such as frequency domain, code domain, space domain, etc.). For a UE or UE group, its UGFT resource pool includes a periodically occurring UGFT window (called UGFT interference), and one UGFT window includes N temporally consecutive UGFT resource units (called UGFT slot).

The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto. It is to be understood that the embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

In the embodiment shown in fig. 2, an uplink transmission method on a user equipment side is provided, which includes:

s21, the UE obtains the configuration information of the UGFT window configured for the UE or the UE group where the UE is located by the network side according to the configuration signaling.

Wherein the configuration information comprises: a period of the UGFT window (denoted as ugfc-period), and/or an Offset of the UGFT window within the period (denoted as ugfc-Offset).

Specifically, the period of the UGFT window, the offset of the UGFT window in the period, and the specific value of the length of the UGFT resource unit may be measured by absolute time, such as how many ms, or may be measured by a multiple of a certain basic time interval, such as a multiple of a subframe. FIG. 3 gives an example of a periodic centralized UGFT resource pool allocation.

S22, the UE determines the position of the UGFT window according to the configuration information of the UGFT window.

S23, the UE carries out uplink transmission on the UGFT resource units contained in the UGFT window.

The embodiment of the invention provides a centralized UGFT resource allocation mode, wherein UE obtains the configuration information of a UGFT window configured for the UE or a UE group where the UE is located on a network side according to configuration signaling, determines the position of the UGFT window according to the configuration information, and performs uplink transmission on UGFT resource units contained in the UGFT window. The uplink transmission of the UE or the UE group is scheduled only by the configuration signaling, so that the authorization-free uplink transmission of the UE in the UGFT window configured by the UE or the UE group where the UE is located is realized, and the uplink transmission of the UE in the UGFT window configured by the UE or the UE group where the UE is located is realized in an authorization-free mode, so that the signaling overhead is reduced, the interaction time delay is reduced, and the spectrum efficiency is improved.

In the embodiment of the invention, for a transmission system similar to LTE and taking a system frame-subframe as a time domain timing basic structure, a network side only needs to inform UE of values of two signaling elements of ugfc-period and ugfc-Offset, and the UE can acquire the accurate initial position of a UGFT window. Assuming that a basic time domain System Frame-subframe structure similar to LTE is used for 5G NR, if a System Frame includes S subframe (assuming that NR System Frame duration is fixed, but a plurality of subframe types with different lengths are defined, S also has a plurality of values), and the numerical units of ugfc-Periodicity and ugfc-Offset are subframes, the UE can obtain the subframe Number in a System Frame Number (System Frame Number, abbreviated as SFN) corresponding to the start position of the UGFT window through the following expression:

SFN mod T＝FLOOR(ugfc-Offset/S)；

subframe＝ugfc-Offset mod S；

with T＝ugfc-Periodicity/S；

further, the UE can obtain the end position of the UGFT window according to the value N. The specific values of ugfc-Periodicity, ugfc-Offset, and N may be carried in L1 (layer 1 physical layer) signaling, L2 (layer 2 data link layer) signaling (such as Medium Access Control (MAC) layer signaling), L3 (higher layer) signaling (such as Radio Resource Control (RRC), for example), and/or broadcast messages.

Optionally, the notification frequencies or the update frequencies of the ugfc-period, the ugfc-Offset, and the N are not required to be consistent, so the ugfc-period, the ugfc-Offset, and the N may be sent in the same signaling or may be sent through different signaling.

In the embodiment of the present invention, if the UGFT is applied to the unlicensed spectrum, the UE needs to monitor whether the unlicensed spectrum is idle (i.e. Clear Channel Assessment (CCA) or not) before sending the signal, for example, determine a busy-idle state of the UE according to a magnitude of received power on the unlicensed spectrum, if the received power is smaller than a certain threshold, it is determined that no interference source is in the idle state on the unlicensed spectrum, the signal is sent on the unlicensed spectrum, otherwise, the signal is not sent. This listen-Before-send mechanism to avoid collision/collision of multi-user transmissions in time is called lbt (listen Before talk).

In the embodiment of the invention, UGFT configuration (UGFT configuration, UGFC for short) of different UEs or different UE groups can be different, thereby reducing transmission conflict of multiple users on time-frequency positions.

Specifically, the UGFC differences include the following three possible cases:

the periods of the UGFT windows are the same, but the offset of the UGFT windows in the periods is different; or

The UGFT windows have the same offset in the period, but the period of the UGFT windows is different; or

The period of the UGFT window and the offset of the UGFT window in the period are different.

When the embodiment of the present invention is applied to an unlicensed spectrum, the UE performs uplink transmission on the UGFT resource unit included in the UGFT window in S23, including the following two possible implementation manners:

and in the mode A, the UE executes LBT in a reserved time interval before the UGFT resource unit, and performs uplink transmission on the UGFT resource unit after the LBT is successful.

And B, the UE executes LBT in the reserved time interval in the UGFT resource unit, and performs uplink transmission on the UGFT resource unit after the LBT is successful.

For the mode A and the mode B, in the reserved time interval, 1) the UE corresponding to the UGFT window where the UGFT resource unit is located or any UE in the UE group does not perform uplink transmission on the frequency domain resource corresponding to the UGFT resource unit; 2) the network side at least does not perform downlink transmission on the frequency domain resource corresponding to the UGFT resource unit; 3) and the network side at least does not schedule the UE to carry out uplink transmission on the frequency domain resource corresponding to the UGFT resource unit. The size of the reserved time interval depends on the maximum time interval required for LBT.

For the method a and the method B, optionally, if the LBT duration is not an integer multiple of the UGFT resource unit length (i.e. the duration of the UGFT resource unit in the time domain), then: the network side or the UE needs to transmit part of the UGFT resource units on the UGFT resource unit where the reserved time interval start time is. For example, the length of one UGFT resource unit is 1ms (corresponding to one subframe length of LTE), and the maximum required duration of LBT is much shorter than 1ms, the network side or the UE may perform transmission of partial subframes within the 1ms subframe length.

In this embodiment of the present invention, when the UE performs uplink transmission on the UGFT resource unit included in the UGFT window in S23, the method includes the following two possible implementation manners:

mode 1, the UE randomly selects K UGFT resource units from N UGFT resource units in the UGFT window, and performs uplink transmission on the K UGFT resource units, where K is an integer less than or equal to N [1, N '], and N' is a positive integer less than or equal to N.

Optionally, N 'may be pre-agreed, or may be notified to the UE by the network side through the configuration information, or may be notified to the UE by the network side through other signaling, and the number of transmissions or the time for continuous transmission of one UE in one UGFT window may be limited by N'.

Optionally, the network side may adjust the value of N' according to the transmission success condition of the UGFT.

In this way, after knowing the location of the UGFT window, the UE randomly selects K UGFT resource units from the N UGFT resource units for uplink transmission.

Different UEs all randomly select different numbers of UGFT resource units for uplink transmission, so that transmission conflicts of multiple users at time-frequency positions are reduced.

When the method is applied to the unlicensed spectrum, the UE performs LBT before or in the K UGFT resource units after randomly selecting the K UGFT resource units. And if the LBT is successful, allowing uplink transmission in the subsequent UGFT resource unit or the UGFT resource unit in which the LBT is located, wherein the specific position for performing the uplink transmission depends on whether the LBT starts from the starting time of one UGFT resource unit or ends at the starting time of one UGFT resource unit. And if one or more UGFT resource units after the UGFT resource unit where the LBT succeeds also belong to the selected K UGFT resource units. Optionally, the UE may transmit continuously without LBT on neighboring UGFT resource elements.

When the method is applied to the unlicensed spectrum, continuous transmission of the UE in the resource unit adjacent to the UGFT may occur, the duration of the continuous transmission is also limited by a Maximum Channel Occupancy Time (MCOT) on the unlicensed spectrum, and services with different priorities may have different MCOTs.

And in the mode 2, the UE selects a random number L from the [1, N' ] and performs uplink transmission on L UGFT resource units in the UGFT window.

Specifically, the UE randomly generates a random natural number L between [1, N' ], the value of L constraining the number of UGFT resource units that the UE is allowed to occupy at most in a UGFT window. Wherein, the definition of N' is specifically referred to the related description in the above mode 1.

Since only the number of UGFT resource units that the UE is allowed to occupy at most in the UGFT window is determined, how to select the initial UGFT resource units for transmission comprises the following modes:

manner 21, to increase the transmission probability, the UE may choose to attempt transmission of L consecutive UGFT resource units starting from the first UGFT resource unit.

When the method is applied to the unlicensed spectrum, the UE may sequentially try LBT from a first UGFT resource unit, and if LBT succeeds at a certain UGFT resource unit, the UE may perform uplink transmission in the UGFT resource unit and subsequent UGFT resource units, but it is required that a total duration of transmission in a UGFT window does not exceed L UGFT resource units, and optionally, LBT is not required on the continuously transmitted UGFT resource units. Of course, whether the UE tries to transmit L times depends on its own traffic.

When the method is applied to the unlicensed spectrum, continuous transmission of the UE in the resource unit adjacent to the UGFT may occur, the duration of the continuous transmission is also limited by the maximum channel occupation time MCOT on the unlicensed spectrum, and services with different priorities may have different MCOT.

And in a mode 22, in order to reduce the probability of UE transmission collision, the UE randomly selects one UGFT resource unit from the UGFT resource units included in the UGFT window as a starting position of uplink transmission, and performs the uplink transmission.

Specifically, the UE randomly selects one UGFT resource unit from the N UGFT resource units as a start position of uplink transmission, and the UE may perform uplink transmission on L UGFT resource units starting from the UGFT resource unit.

When the method is applied to the unlicensed spectrum, the UE may sequentially try LBT from the selected start position, and if LBT succeeds on a certain UGFT resource unit, the UE may perform uplink transmission in the UGFT resource unit and the subsequent UGFT resource unit, but the total duration of transmission in one UGFT window is not more than L UGFT resource units. Optionally, LBT is not required on the continuously transmitted UGFT resource units.

Obviously, in addition to the limitations of MCOT, the maximum length of time that the UE can transmit depends on the location of the randomly chosen starting position within the UGFT window. Since the two UGFT windows are not contiguous in time, the UE needs to reselect the starting position in each UGFT window.

And 23, the UE randomly selects a backoff number M, executes LBT from a first UGFT resource unit contained in the UGFT window, and performs uplink transmission on the UGFT resource unit where the LBT is successfully completed for the Mth time or the subsequent UGFT resource unit, wherein M is more than or equal to 1 and less than or equal to N.

Specifically, the UE randomly selects a backoff number M, then sequentially tries LBT from a first UGFT resource unit in the UGFT window, and backs off to M-1 if LBT succeeds on a certain UGFT resource unit, and only if LBT succeeds on all M UGFT resource units of the UE, uplink transmission can be started in the UGFT resource unit where the mth successful LBT (at this time, the backoff number backs off to 0) is located or in the subsequent UGFT resource unit. But the total time length of one UGFT window transmission does not exceed L UGFT resource units. For example, fig. 4 presents a random backoff based UGFT resource unit selection procedure when M is 3.

In this manner, if the backoff number in the current UGFT window is not backed off to 0, the UE performs uplink transmission on the UGFT resource unit where the LBT is successfully completed for the mth time or on a subsequent UGFT resource unit, including:

the UE suspends back-off after the current UGFT window is finished; and after the next UGFT window arrives, the UE starts back-off by the back-off number when the back-off is suspended from the first UGFT resource unit of the next UGFT window.

Obviously, in addition to the limit of MCOT, the maximum duration that the UE can transmit depends on the location of the UGFT resource unit where the backoff number is backed off to 0. Note that, the UE needs to reselect the backoff number M when the backoff number is backed off to the next UGFT window after 0.

Based on any of the embodiments, for most service types, the UE needs to wait for ACK/NACK acknowledgement at the network side after transmission is completed to know whether transmission is successful, and if not, needs to retransmit failed data according to a Hybrid Automatic Repeat reQuest (HARQ) rule. In order to avoid that the UE is in a state of waiting for receiving ACK/NACK for a long time after transmission, it is necessary to restrict the specific time for the network side to feed back ACK/NACK, and it is considered that if the UE is applied to the unlicensed spectrum network side, LBT is also required before feeding back ACK/NACK, so that a fixed ACK/NACK transmission time cannot be defined, but a certain offset should be reserved, that is, the network side is allowed to transmit ACK/NACK within a set time interval, where this time interval is referred to as an ACK/NACK window. Correspondingly, in S23, after the UE performs uplink transmission on the UGFT resource unit included in the UGFT window, the method further includes:

The starting time of the ACK/NACK window can be implemented by the following three ways:

the start time of the pattern A, ACK/NACK window is the start time or end time of any UGFT window.

In this way, the network side may perform centralized ACK/NACK feedback for uplink transmission in the UGFT window before the UGFT window or/and for part or all uplink transmission in the UGLT window in the ACK/NACK window.

The start time of the pattern B, ACK/NACK window is the start time or end time of any UGFT resource element.

For example, fig. 5A shows an example where the start time of the ACK/NACK window is the start time of any one UGFT window, and fig. 5B shows an example where the start time of the ACK/NACK window is the end time of any one UGFT window.

The start of the pattern C, ACK/NACK window is the time that is spaced a set duration after the end of any UGFT resource element.

For example, fig. 5C shows an example where the start time of the ACK/NACK window is a time that is a set duration after the end time of any UGFT resource unit.

In the method, the starting time of the ACK/NACK window corresponds to a certain time after the end time of the UGFT resource unit, and the reserved time is the network side processing time delay for receiving and decoding the UE uplink transmission.

Based on any one of the above modes a to C, the ending time of the ACK/NACK window may be characterized by an allowed ACK/NACK delay value (i.e., ACK/NACK window duration), which may be measured by an absolute time, such as how many ms, or a multiple of a certain basic time interval (e.g., a subframe).

Obviously, in the mode a or the mode B, at most two signaling (this signaling may be L1 signaling (physical layer signaling), L2 signaling (data link layer signaling), L3 signaling (higher layer signaling, such as Media Access Control (MAC), Radio Resource Control (RRC), or broadcast message) are required to enable the UE to know the accurate position of the ACK/NACK window, where the two signaling may be the start position of the ACK/NACK window and the duration of the ACK/NACK window, and the start position may use 1 bit to represent the start time or the end time of the corresponding UGFT Resource unit, or the start time or the end time of the UGFT window. If the starting time of the ACK/NACK window and the window duration are both system default values, no notification signaling is needed; if the starting position of the ACK/NACK window is a default value, only one signaling is needed to inform the duration of the ACK/NACK window.

In the method C, at most two signaling (the signaling may be L1 signaling, L2 signaling, L3 signaling, or broadcast message) are required to let the UE know the accurate position of the ACK/NACK window, where the two signaling may be the network side processing delay and the ACK/NACK window duration. If the network side processing time delay and the ACK/NACK window duration are both system default values, no notification signaling is needed; if the network side processing delay is a default value, only one signaling is needed to inform the ACK/NACK window duration.

Further, the UE receiving the ACK/NACK information replied by the network side within the ACK/NACK window includes the following four cases:

1. if the ACK replied by the network side is received, the UE does not need to retransmit;

2. if the UE receives the NACK replied by the network side in the ACK/NACK window, then: the UE retransmits on the UGFT resource unit behind the ACK/NACK window; or the UE retransmits the UGFT resource units in the next UGFT window after the ACK/NACK window.

Alternatively, the retransmitted HARQ data version may be different from that of the initial transmission or the last retransmission.

3. And if the UE receives a scheduling signaling for retransmission sent by a network side in the ACK/NACK window, the UE retransmits on the resource unit scheduled by the scheduling signaling.

Optionally, if the UE receives ACK/NACK information when receiving the scheduling signaling for retransmission sent by the network side in the ACK/NACK window, the ACK/NACK information is ignored.

4. If the UE does not receive any reply from the network side in the ACK/NACK window, then:

the UE retransmits on the UGFT resource unit behind the ACK/NACK window;

or the UE retransmits the UGFT resource units in the next UGFT window after the ACK/NACK window.

Alternatively, the retransmitted HARQ data version may be the same as that of the initial transmission or the last retransmission.

In the embodiment shown in fig. 6, a method for performing LBT is provided, which includes:

s61, the UE determines the location of the reserved time interval for LBT.

The reserved time interval may precede or be within the UGFT resource unit.

S62, LBT is carried out on the UE at the determined position.

Fig. 7A gives an example of the reservation time interval may precede the UGFT resource units, and fig. 7B gives an example of the reservation time interval may be within the UGFT resource units.

In fig. 7A and 7B, in the reserved time interval, 1) neither the UE corresponding to the UGFT resource unit nor any UE in the UE group performs uplink transmission on the frequency domain resource corresponding to the UGFT resource unit; 2) the network side at least does not perform downlink transmission on the frequency domain resource corresponding to the UGFT resource unit; 3) and the network side at least does not schedule the UE to carry out uplink transmission on the frequency domain resource corresponding to the UGFT resource unit. The size of the reserved time interval depends on the maximum time interval required for LBT.

In fig. 7A and 7B, optionally, if the LBT duration is not an integer multiple of the UGFT resource unit length (i.e., the UGFT resource unit duration in the time domain), then: the network side or the UE needs to transmit part of the UGFT resource units on the UGFT resource unit where the reserved time interval start time is. For example, the length of one UGFT resource unit is 1ms (corresponding to one subframe length of LTE), and the maximum required duration of LBT is much shorter than 1ms, the network side or the UE may perform transmission of partial subframes within the 1ms subframe length.

The UGFT resource unit in the embodiment shown in fig. 6 may be any UGFT resource unit within the UGFT window, and the related description of the UGFT window specifically refers to the description in the embodiment shown in fig. 2.

In addition, the embodiment shown in fig. 6 may be combined with any of the embodiments shown in fig. 2.

In the embodiment shown in fig. 8, an uplink transmission method on a network side is provided, which includes:

s81, configuring a UGFT window for the UE or the UE group where the UE is located by the network side, wherein the UGFT window comprises N continuous UGFT resource units in time, and N is a positive integer;

s82, the network side sends the configured UGFT window configuration information;

and S83, the network side receives the uplink transmission of the UE on the UGFT resource unit contained in the UGFT window.

Please refer to the related description in the embodiment shown in fig. 2, and details of the configuration information are not repeated here.

Optionally, the network side may send the configuration information of the configured UGFT window through L1 signaling, L2 signaling, L3 signaling, or a broadcast message.

Optionally, after receiving the uplink transmission of the UE on the UGFT resource unit included in the UGFT window, the network side further includes:

Please refer to the related description in the embodiment shown in fig. 2 for the ACK/NACK window, which is not described herein again.

The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, the embodiment of the present invention further provides a user equipment, and since the principle of the equipment for solving the problem is similar to that of the method embodiment shown in fig. 2, the implementation of the equipment may refer to the implementation of the method, and repeated details are not repeated.

In the embodiment shown in fig. 9, there is provided a user equipment comprising: an obtaining module 91, a determining module 92 and a transmitting module 93; wherein:

in a first possible embodiment:

the obtaining module 91 is configured to obtain, according to the configuration signaling, configuration information of an uplink grant-free transmission UGFT window configured by a network side for the UE or a UE group in which the UE is located;

the determining module 92 is configured to determine a location of the UGFT window according to the configuration information of the UGFT window;

the transmission module 93 is configured to perform uplink transmission on the UGFT resource units included in the UGFT window, where the UGFT window includes N UGFT resource units that are consecutive in time, and N is a positive integer.

Optionally, the configuration information includes: a period of the UGFT window, and/or an offset of the UGFT window within the period.

In a possible implementation, the transmission module 93 is specifically configured to:

randomly selecting K UGFT resource units from N UGFT resource units in the UGFT window, and performing uplink transmission on the K UGFT resource units, wherein K belongs to [1, N '], and N' is a positive integer less than or equal to N; or

And selecting a random number L from [1, N' ] and carrying out uplink transmission on L UGFT resource units in the UGFT window.

In a possible implementation manner, when the transmission module 93 performs uplink transmission on L UGFT resource units in the UGFT window, specifically configured to:

randomly selecting one UGFT resource unit from the UGFT resource units contained in the UGFT window as an initial position of uplink transmission, and performing the uplink transmission; or

Randomly selecting one UGFT resource unit from the UGFT resource units contained in the UGFT window to perform monitoring and then sending LBT, and performing uplink transmission on the UGFT resource unit where the LBT succeeds or the subsequent UGFT resource units; or

And randomly selecting a backoff number M, starting to execute LBT from the first UGFT resource unit contained in the UGFT window, and performing uplink transmission on the UGFT resource unit where the LBT is successfully completed for the Mth time or the subsequent UGFT resource unit, wherein M is more than or equal to 1 and less than or equal to N.

In a possible implementation manner, if the backoff number in the current UGFT window is not backed off to 0, when the transmission module 93 successfully completes uplink transmission on the UGFT resource unit where the LBT is located at the mth time or on a subsequent UGFT resource unit, the method is specifically configured to:

pausing the backoff after the current UGFT window is ended; and

starting backoff from the first UGFT resource unit of the next UGFT window by the backoff number when the backoff is suspended after the next UGFT window arrives.

performing LBT within a reserved time interval before the UGFT resource unit, and after the LBT succeeds, performing uplink transmission on the UGFT resource unit; or

And executing LBT in the reserved time interval in the UGFT resource unit, and after the LBT is successful, performing uplink transmission on the UGFT resource unit.

In a possible implementation, the transmission module 93 is further configured to:

and receiving ACK/NACK replied by the network side in an ACK/NACK window corresponding to the UGFT window.

In a second possible embodiment: the determining module 92 is configured to determine a location of a reserved time interval for LBT, where the reserved time interval may precede or be within a UGFT resource unit; and performing LBT at the determined position.

The UGFT resource unit may be any UGFT resource unit within the UGFT window, and the description of the UGFT window refers to the description in the first embodiment.

In this embodiment, the obtaining module 91, the determining module 92 and the transmitting module 93 are further configured to perform the method in the embodiment shown in fig. 2.

In the embodiment of fig. 10, another user equipment is provided, comprising a transceiver, and at least one processor connected to the transceiver, wherein:

in a first possible embodiment: the processor 600, which is used to read the program in the memory 620, executes the following processes:

according to the configuration signaling, obtaining configuration information of an uplink authorization-free transmission UGFT window configured for the UE or a UE group where the UE is located on a network side; determining the position of the UGFT window according to the configuration information of the UGFT window; and controlling the transceiver 610 to perform uplink transmission on the UGFT resource units included in the UGFT window, where the UGFT window includes N UGFT resource units that are consecutive in time, and N is a positive integer;

a transceiver 610 for receiving and transmitting data under the control of the processor 600.

In fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 600 is responsible for managing the bus architecture and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 620 may store data used by the processor 600 in performing operations.

Alternatively, the processor 600 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).

In one possible implementation, the processor 600 reads the program in the memory 620 and specifically executes the following processes:

In a possible implementation manner, when the processor 600 reads the program in the memory 620 and executes the program on L UGFT resource units in the UGFT window to perform uplink transmission, the processor is specifically configured to:

In a possible implementation manner, if the backoff number in the current UGFT window is not backed off to 0, the processor 600 reads the program in the memory 620, and performs uplink transmission on the UGFT resource unit where the LBT is successfully completed for the mth time or the subsequent UGFT resource unit, specifically configured to:

pausing the backoff after the current UGFT window is ended; and

In one possible implementation, the processor 600 reads the program in the memory 620 and further performs the following processes:

In a second possible embodiment: the processor 600 is used to read the program in the memory 620 and execute the following processes:

determining a location of a reserved time interval for performing LBT, wherein the reserved time interval may precede or be within a UGFT resource unit; and performing LBT at the determined position.

In this embodiment, the processor 600 reads the program in the memory 620 and also performs the method in the embodiment shown in fig. 2.

Based on the same inventive concept, the embodiment of the present invention further provides a network side device, and since the principle of the device for solving the problem is similar to that of the method embodiment shown in fig. 8, the implementation of the device may refer to the implementation of the method, and repeated details are omitted.

In the embodiment shown in fig. 11, a network-side device is provided, which includes:

a configuration module 111, configured to configure a UGFT window for a UE or a UE group in which the UE is located, where the UGFT window includes N UGFT resource units that are consecutive in time, and N is a positive integer;

a sending module 112, configured to send configuration information of the configured UGFT window to the UE;

a receiving module 113, configured to receive, on the UGFT resource unit included in the UGFT window, the uplink transmission of the UE.

In a possible implementation, the sending module 112 is further configured to:

and replying the ACK/NACK of the uplink transmission to the UE in an ACK/NACK window corresponding to the UGFT window.

In the embodiment shown in fig. 12, another network-side device is provided, which includes a transceiver and at least one processor connected to the transceiver, wherein:

the processor 500, which is used to read the program in the memory 520, executes the following processes:

configuring a UGFT window for UE or a UE group where the UE is located, wherein the UGFT window comprises N UGFT resource units which are continuous in time, and N is a positive integer; sending the configured UGFT window configuration information to the UE; receiving, by transceiver 510, uplink transmissions of the UE on the UGFT resource units included in the UGFT window;

a transceiver 510 for receiving and transmitting data under the control of the processor 500.

Where in fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 500 and memory represented by memory 520. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 520 may store data used by the processor 500 in performing operations.

Alternatively, the processor 500 may be a CPU, ASIC, FPGA or CPLD.

In one possible implementation, the processor 500 reads the program in the memory 520 and further performs the following processes:

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An uplink transmission method, comprising:

user Equipment (UE) acquires configuration information of an uplink grant-free transmission UGFT window configured for the UE or a UE group where the UE is located by a network side according to a configuration signaling, wherein the configuration information comprises a period of the UGFT window;

the UE carries out uplink transmission on UGFT resource units contained in the UGFT window, the UGFT window contains N continuous UGFT resource units in time, and N is a positive integer;

wherein the UE performs uplink transmission on the UGFT resource unit included in the UGFT window, and the uplink transmission includes:

the UE randomly selects K UGFT resource units from N UGFT resource units in the UGFT window and performs uplink transmission on the K UGFT resource units, wherein K belongs to [1, N '], and N' is a positive integer less than or equal to N; or

And the UE selects a random number L from the [1, N' ] and carries out uplink transmission on L UGFT resource units in the UGFT window.

2. The method of claim 1, wherein the configuration information further comprises an offset of the UGFT window within the period.

3. The method of claim 1, wherein the UE performs uplink transmission on L UGFT resource elements in the UGFT window, comprising:

4. The method of claim 3, wherein if the backoff number in the current UGFT window is not backed off to 0, the UE performs uplink transmission on the UGFT resource unit where the LBT is successfully completed for the Mth time or a subsequent UGFT resource unit, comprising:

the UE suspends back-off after the current UGFT window is finished; and

5. The method of any one of claims 1 to 4, wherein the UE performs uplink transmission on UGFT resource units included in the UGFT window, and the method comprises the following steps:

6. The method of any one of claims 1-4, wherein after the UE performs uplink transmission on UGFT resource elements included in the UGFT window, the method further comprises:

7. An uplink transmission method, comprising:

a network side configures a UGFT window for UE or a UE group where the UE is located, wherein the UGFT window comprises N UGFT resource units which are continuous in time, and N is a positive integer;

the network side sends the configured UGFT window configuration information to the UE, wherein the configuration information comprises the period of the UGFT window;

a network side receives uplink transmission of the UE on K UGFT resources randomly selected from the N UGFT resources on a UGFT resource unit contained in the UGFT window, wherein the K belongs to [1, N '], and N' is a positive integer less than or equal to N; or receiving uplink transmission of the UE on L UGFT resource units in the UGFT window, wherein L is a random number selected from [1, N' ] by the UE.

8. The method of claim 7, wherein the configuration information further comprises: an offset of the UGFT window within the period.

9. The method as claimed in claim 7 or 8, wherein the network side, after receiving the uplink transmission of the UE on the UGFT resource unit included in the UGFT window, further includes:

and the network side replies the ACK/NACK of the uplink transmission to the UE in an ACK/NACK window corresponding to the UGFT window.

10. A User Equipment (UE), the UE comprising:

an obtaining module, configured to obtain, according to a configuration signaling, configuration information of an uplink grant-free transmission UGFT window configured by a network side for the UE or a UE group in which the UE is located, where the configuration information includes a period of the UGFT window;

a determining module, configured to determine a location of the UGFT window according to the configuration information of the UGFT window;

a transmission module, configured to perform uplink transmission on the UGFT resource units included in the UGFT window, where the UGFT window includes N UGFT resource units that are consecutive in time, and N is a positive integer;

wherein the transmission module is specifically configured to:

11. The UE of claim 10, wherein the configuration information further comprises: an offset of the UGFT window within the period.

12. The UE of claim 10, wherein the transmission module, when performing uplink transmission on L UGFT resource units in the UGFT window, is specifically configured to:

13. The UE of claim 12, wherein if the backoff number in the current UGFT window is not backed off to 0, the transmission module is specifically configured to, when performing uplink transmission on the UGFT resource unit where the LBT is successfully completed for the mth time or on a subsequent UGFT resource unit, perform:

pausing the backoff after the current UGFT window is ended; and

14. The UE of any one of claims 10 to 13, wherein the transmission module is specifically configured to:

15. The UE of any of claims 10 to 13, wherein the transmission module is further configured to:

16. A network-side device, the device comprising:

the UE comprises a configuration module and a processing module, wherein the configuration module is used for configuring a UGFT window for the UE or a UE group where the UE is located, the UGFT window comprises N UGFT resource units which are continuous in time, and N is a positive integer;

a sending module, configured to send configuration information of the configured UGFT window to the UE, where the configuration information includes a period of the UGFT window;

a receiving module, configured to receive, on a UGFT resource unit included in the UGFT window, uplink transmission of the UE on K UGFT resources randomly selected from the N UGFT resources, where K belongs to [1, N '], and N' is a positive integer less than or equal to N; or receiving uplink transmission of the UE on L UGFT resource units in the UGFT window, wherein L is a random number selected from [1, N' ] by the UE.

17. The apparatus of claim 16, wherein the configuration information further comprises: an offset of the UGFT window within the period.

18. The device of claim 16 or 17, wherein the sending module is further to: