CN107295648B

CN107295648B - Uplink transmission method, UE, base station and system

Info

Publication number: CN107295648B
Application number: CN201610197551.0A
Authority: CN
Inventors: 王加庆; 潘学明; 司倩倩
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2020-03-06
Anticipated expiration: 2036-03-31
Also published as: WO2017167196A1; CN107295648A; TW201737668A; TWI655852B

Abstract

The invention provides an uplink transmission method, UE, a base station and a system, wherein the method comprises the following steps: receiving indication information sent by a base station; determining detection resources for LBT detection according to the indication information; and carrying out the LBT detection access channel on the detection resource, and carrying out uplink transmission to the base station by using the channel in a scheduled subframe. The embodiment of the invention can save transmission resources.

Description

Uplink transmission method, UE, base station and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an uplink transmission method, a User Equipment (UE), a base station, and a system.

Background

With the continuous increase of mobile data traffic, spectrum resources are more and more strained, and network deployment and service transmission by using authorized spectrum resources may not meet traffic demands. Therefore, a Long Term Evolution (LTE) system considers that transmission is deployed on an Unlicensed spectrum resource, that is, an Unlicensed frequency band LTE (Unlicensed LTE, abbreviated as U-LTE or LTE-U), so as to improve user experience and extend coverage.

At present, in order to support frequency selective scheduling during uplink transmission of a plurality of UEs, a LTE-U system is configured with a subframe for transmitting Sounding Reference Signals (SRS), and the UE transmits the SRS in the subframe to implement frequency selective scheduling. However, in actual transmission, the SRS symbol for transmitting the SRS is always after the transmission of the Physical Uplink Shared Channel (PUSCH) Uplink data. For example: the last symbol in the subframe is the SRS symbol. However, in practical applications, there may be a case that the UE does not transmit the SRS in the SRS symbol of the subframe, so that the UE cannot access the channel in the next subframe of the subframe, thereby vacating the subframe and causing a waste of transmission resources.

Disclosure of Invention

The invention aims to provide an uplink transmission method, UE, a base station and a system, which solve the problem of transmission resource waste.

In order to achieve the above object, an embodiment of the present invention provides an uplink transmission method, including:

receiving indication information sent by a base station;

determining detection resources for performing Listen Before Talk (LBT) detection according to the indication information;

and carrying out the LBT detection access channel on the detection resource, and carrying out uplink transmission to the base station by using the channel in a scheduled subframe.

Optionally, the determining, according to the indication information, a detection resource for performing LBT detection includes:

if the indication information indicates that the scheduled subframe is not configured with LBT resources, taking the resources of the previous subframe of the scheduled subframe as detection resources for carrying out the LBT detection.

Optionally, using the resource of the subframe previous to the scheduled subframe as the detection resource for performing the LBT detection includes:

taking an SRS symbol of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection; or

And taking the idle resource of the subframe which is one subframe before the scheduled subframe as the detection resource for carrying out the LBT detection.

if the indication information indicates that the scheduled subframe is configured with LBT resources, the LBT resources in the scheduled subframe are used as detection resources for carrying out the LBT operation.

Optionally, the method further includes:

receiving a signaling which is sent by the base station and indicates to occupy an SRS symbol for uplink transmission;

the using the channel to perform uplink transmission to the base station in the scheduled subframe includes:

and according to the signaling, carrying out uplink transmission on the base station by using the channel in the resource including the SRS symbol in the scheduled subframe.

An embodiment of the present invention further provides an uplink transmission method, including:

sending indication information to UE (user equipment) so that the UE determines detection resources for LBT detection according to the indication information and accesses channels for the LBT detection in the detection resources;

and receiving uplink transmission of the UE in the scheduled subframe by using the channel.

Optionally, the indication information indicates that LBT resources are not configured for the scheduled subframe, so that the UE uses resources of a subframe previous to the scheduled subframe as detection resources for performing the LBT detection.

Optionally, the detection resource is an SRS symbol of a subframe previous to the scheduled subframe; or

The detection resource is an idle resource of a subframe before the scheduled subframe.

Optionally, the indication information indicates that the scheduled subframe is configured with LBT resources, so that the UE uses the LBT resources in the scheduled subframe as detection resources for performing the LBT operation.

Optionally, the method further includes:

sending a signaling for indicating to occupy an SRS symbol to perform uplink transmission to the UE;

the receiving uplink transmission of the UE in a scheduled subframe by using the channel comprises:

and receiving uplink transmission which is carried out by the UE according to the signaling and comprises SRS symbols in the scheduled subframe by using the channel.

An embodiment of the present invention further provides a UE, including:

the first receiving module is used for receiving the indication information sent by the base station;

a determining module, configured to determine, according to the indication information, a detection resource for performing LBT detection;

a transmission module, configured to perform the LBT detection on the access channel in the detection resource, and perform uplink transmission to the base station using the channel in a scheduled subframe.

Optionally, the determining module is configured to, if the indication information indicates that the scheduled subframe is not configured with LBT resources, use resources of a subframe previous to the scheduled subframe as detection resources for performing the LBT detection.

Optionally, the determining module is configured to use a SRS symbol of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection; or

The determining module is configured to use an idle resource of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection.

Optionally, the determining module is configured to, if the indication information indicates that the scheduled subframe is configured with an LBT resource, use the LBT resource in the scheduled subframe as a detection resource for performing the LBT operation.

Optionally, the UE further includes:

a second receiving module, configured to receive a signaling indicating that an SRS symbol is occupied by the indication sent by the base station for uplink transmission;

and the transmission module is used for carrying out uplink transmission to the base station by using the channel in the resource including the SRS symbol in the scheduled subframe according to the signaling.

An embodiment of the present invention further provides a base station, including:

a first sending module, configured to send indication information to a UE, so that the UE determines, according to the indication information, a detection resource for performing LBT detection, and performs the LBT detection on the detection resource to access a channel;

a receiving module, configured to receive uplink transmission performed by the UE in a scheduled subframe using the channel.

Optionally, the base station further includes:

a second sending module, configured to send, to the UE, a signaling indicating that an SRS symbol is occupied for uplink transmission;

and the receiving module is used for receiving uplink transmission which is carried out by the UE by using the channel in resources including SRS symbols in the scheduled subframe according to the signaling.

An embodiment of the present invention further provides an uplink transmission system, including:

the base station is used for sending the indication information to the UE;

the UE is used for receiving the indication information sent by the base station;

the UE is also used for determining detection resources for LBT detection according to the indication information;

the UE is also used for carrying out the LBT detection access channel on the detection resources and carrying out uplink transmission to the base station by using the channel in a scheduled subframe;

the base station is further configured to receive uplink transmission of the UE in the scheduled subframe using the channel.

The technical scheme of the invention at least has the following beneficial effects:

according to the embodiment of the invention, the indication information sent by the base station is received, the detection resource for LBT detection is determined according to the indication information, the LBT detection is carried out on the detection resource to access the channel, and the channel is used for carrying out uplink transmission to the base station in the scheduled subframe. Therefore, the LBT access channel can be realized according to the detection resource determined in the indication information, so that the subframe which can not be accessed to the channel can be avoided, the transmission resource can be saved, and the problem of transmission resource waste is solved.

Drawings

Fig. 1 is a schematic diagram of a network structure according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating an uplink transmission method according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating subframe transmission data according to an embodiment of the invention;

fig. 4 is a schematic diagram of another subframe for transmitting data according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating another uplink transmission method according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another UE according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another base station according to an embodiment of the present invention;

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

fig. 11 is a schematic structural diagram of another base station according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an uplink transmission system according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The embodiment of the invention provides an uplink transmission method, UE, a base station and a system, aiming at the problem that in the prior art, the UE cannot transmit SRS in an SRS symbol of a subframe, so that the UE cannot access a channel in the next subframe of the subframe, and therefore the subframe is vacated, and transmission resources are wasted. In the embodiment of the invention, the detection resource for LBT detection is determined through the indication information sent by the base station, so that the LBT detection is carried out on the detection resource to access a channel, and the channel is used for carrying out uplink transmission on the base station in the scheduled subframe, thereby avoiding the subframe which can not access the channel and saving the transmission resource.

Referring to fig. 1, fig. 1 is a schematic diagram of a network structure provided in an embodiment of the present invention, as shown in fig. 1, including a UE11 and a base station. The UE11 may be a terminal device that can access a network, such as a mobile phone, a tablet, a personal computer, a notebook, and a wearable device, and it should be noted that the specific type of the UE11 is not limited in this embodiment of the present invention. The UE11 may establish communication with the base station 12, where the base station 12 may be an evolved Node B (eNB) or other base stations, and it should be noted that a specific type of the base station 12 is not limited in this embodiment of the present invention.

Based on the network structure shown in fig. 1, an embodiment of the present invention provides an uplink transmission method, as shown in fig. 2, including the following steps:

201. and receiving indication information sent by the base station.

202. And determining the detection resources for LBT detection according to the indication information.

203. And carrying out the LBT detection access channel on the detection resource, and carrying out uplink transmission to the base station by using the channel in a scheduled subframe.

In this embodiment, the indication information may be used to indicate that the detection resource for performing the LBT detection is determined, so that step 202 may determine the detection resource according to the indication information. The above-mentioned detection resource may be understood as a starting resource for performing LBT detection, that is, step 202 may be understood as determining a starting position for performing LBT detection. Alternatively, the above-mentioned detection resources may also be understood as the resources required for performing the LBT detection, i.e. step 202 may be understood as determining the detection location for performing the LBT detection. In addition, the detection resource may include one or more symbols, or the detection resource may further include a part of the content in a single symbol, and the like, which is not limited in this embodiment. The symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single-carrier Frequency-Division Multiple Access (SC-FDMA) symbol. The uplink transmission may transmit uplink data or uplink signaling, and the embodiment is not limited thereto.

In this embodiment, the channel may be a physical uplink channel, for example: a Physical Uplink Shared Channel (PUSCH), which may be other Physical Uplink channels in some scenarios, for example: a Physical Random Access Channel (PRACH), etc., and the embodiment is not limited thereto.

The scheduled subframe may be a subframe scheduled by the UE, or the scheduled subframe may also be a current subframe, that is, a subframe currently used by the UE after the UE accesses the channel. In addition, the scheduled subframe may be a subframe in a Frequency Division Duplex (FDD) radio frame, or the scheduled subframe may be a subframe in a Time Division Duplex (TDD) radio frame, and the like. In addition, the detection resource and the scheduled subframe may belong to the same radio frame, that is, step 202 may be to determine the detection resource in the radio frame and perform uplink transmission in the scheduled subframe of the radio frame.

In addition, the uplink transmission may refer to uplink transmission performed after LBT detection is performed to successfully access the channel.

As an alternative implementation, step 202 may include:

Wherein, the indication information may explicitly or implicitly indicate that the LBT resource is not configured for the scheduled subframe. Wherein, explicit may be understood as that the indication information explicitly indicates that the scheduled subframe is not configured with LBT resources, and implicit may be understood as that the indication information implicitly indicates that the scheduled subframe is not configured with LBT resources, for example: the indication information includes an LBT resource configuration field, but the field is internally 0, and the 0 may indicate 0 symbols as the LBT resources, that is, LBT resources are not configured. In addition, the subframe before the scheduled subframe may be a subframe before a scheduled subframe in a radio frame to which the scheduled subframe belongs, which is not limited in this embodiment.

In this embodiment, since the resource of the subframe before the scheduled subframe may be used as the detection resource, that is, step 203 may perform LBT detection on the resource of the frame before the scheduled subframe to perform LBT detection before the boundary of the scheduled subframe, and start uplink transmission at the boundary of the scheduled subframe, so as to effectively utilize the resource of the frame before the scheduled subframe to avoid the resource waste of the subframe before.

Optionally, in this embodiment, the step of using the resource of the subframe before the scheduled subframe as the detection resource for performing the LBT detection may include:

and taking the SRS symbol of the subframe which is one subframe before the scheduled subframe as a detection resource for carrying out the LBT detection.

In this embodiment, LBT detection may be performed on the SRS symbol of the previous subframe, so that uplink transmission may be started at the boundary of the scheduled subframe. For example: as shown in fig. 3, the UE1 and the UE2 may perform LBT detection on the SRS symbol of subframe 1, so that the UE1 and the UE2 start uplink transmission at the boundary of subframe 2, where uplink transmission is exemplified as uplink data in the figure.

In this embodiment, it may be implemented that uplink transmission is started at the boundary of the scheduled subframe, that is, LBT resources do not need to be configured for the scheduled subframe, for example: a Clear channel assessment timeslot (CCA gap) is not configured for the scheduled subframe, and since the overhead of the CCA gap is relatively high, the base station does not need to reserve a CCAgap for each subframe, so as to save network transmission resources. In addition, because the unlicensed frequency band small cell (small cell) channel is slowly changed, the base station does not need to configure SRS transmission for each SRS subframe, and therefore, in the embodiment, SRS transmission and channel access are completed in a manner of time division multiplexing SRS symbols, and no transmission resource is wasted. Of course, in this embodiment, the UE performing LBT detection on SRS symbols is only one specific example of the UE performing LBT detection before subframe boundary according to the base station indication, and does not exclude the case that the UE may perform LBT detection on multiple SC-FDMA symbols before the subframe boundary.

In addition, in this embodiment, the LBT detection may be to start performing CCA at least 25us before the boundary of the scheduled subframe, that is, the SRS symbol is at least 25us away from the scheduled subframe, and if the CCA result indicates that the channel is idle, the UE accesses the channel and starts uplink transmission from the boundary of the scheduled subframe. Or the LBT detection may be to start performing CCA detection at the start position of the empty SRS symbol, start performing countdown by a random backoff (back off) counter, if the channel detection is idle before the scheduled subframe boundary and the countdown of the backoff (back off) counter is 0, the UE accesses the channel to perform uplink transmission from the scheduled subframe boundary, otherwise the UE fails to perform access this time, and abandons transmitting uplink data. The LBT detection method may be configured by the base station to the UE, and certainly, in some scenarios, the method for the UE to actively select the LBT detection is not excluded, and the embodiment is not limited thereto.

The SRS symbol may be the last symbol in the subframe, or the SRS symbol may be another symbol in the subframe, which is not limited in this embodiment.

Optionally, in the foregoing embodiment, the step of using a resource of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection may include:

In this embodiment, the idle resource in the subframe before the scheduled subframe may be implemented as the detection resource, for example: and taking the idle symbol in the previous subframe as the detection resource. In this embodiment, it may also be implemented that uplink transmission is started at the boundary of the scheduled subframe, that is, LBT resources do not need to be configured for the scheduled subframe. In addition, the LBT detection in this embodiment may refer to the LBT detection described in the above embodiment, and is not described herein again.

In an optional implementation manner, the determining, according to the indication information, a detection resource for performing LBT detection includes:

In this embodiment, the indication information may explicitly or implicitly indicate that the scheduled subframe is configured with LBT resources. Wherein, explicit may be understood as that the indication information explicitly indicates that the scheduled subframe is configured with the LBT resource, and implicit may be understood as that the indication information implicitly indicates that the scheduled subframe is configured with the LBT resource, for example: the indication information includes an LBT resource configuration field, but the inside of the LBT resource configuration field is 1 or 2, and the 1 or 2 may indicate 1 or 2 symbols as the LBT resources.

In this embodiment, the LBT resource may be a CCA gap, where the CCA gap may be 1-2 OFDM symbols, and the specific size requires the configuration of the base station. In this embodiment, step 203 may perform LBT detection on the CCA gap to access the channel. For example: the UE may start performing CCA at least 25us before a boundary of resources for uplink transmission in the scheduled subframe, where a CCA start point and an end point are completely within a symbol range before a resource start point for uplink transmission, and if the CCA result channel is idle, the UE access channel uses an incomplete transmission (partial) subframe for uplink transmission. The resource used for uplink transmission in the scheduled subframe may be understood as a physical uplink channel resource of the scheduled subframe, for example: and PUSCH resources. In addition, the LBT detection may be that the UE starts to perform LBT detection from the starting position of the CCA gap, and performs back-off counter countdown, if the channel detection is idle before the boundary of the resource for uplink transmission in the scheduled subframe and the back-off counter countdown is 0, the UE accesses the channel to perform uplink transmission, otherwise the UE fails to access this time and abandons sending uplink data. The embodiment may implement performing LBT detection within the CCA gap after the subframe boundary to avoid resource waste caused by SRS blocking uplink data transmission. The LBT detection method may be configured by the base station to the UE, and certainly, in some scenarios, the method for the UE to actively select the LBT detection is not excluded, and the embodiment is not limited thereto.

In addition, in some scenarios, if the indication information indicates that the scheduled subframe is configured with LBT resources, this embodiment does not exclude that the UE may also use resources of a frame immediately preceding the scheduled subframe as detection resources for performing LBT detection, but an embodiment that uses the LBT resources as the detection resources is a preferred embodiment. In some scenarios, the indication information may further indicate that the detection resource is determined according to a pre-negotiated determination rule, and the UE may determine the detection resource using the determination rule. The determining rule may be pre-negotiated by the UE and the base station, for example, the determining rule may be to use a resource of a subframe previous to the scheduled subframe as the detection resource, or the determining rule may be to use one or more resources previous to the scheduled subframe as the detection resource.

Optionally, in this embodiment, the method may further include the following steps

the step of performing uplink transmission to the base station using the channel in the scheduled subframe may include:

In the embodiment, uplink transmission can be performed by using the SRS symbol of the subframe, because the SRS symbol is not scheduled for SRS transmission in some scenarios, uplink transmission is performed by using the SRS symbol, so as to avoid wasting the empty SRS symbol. In addition, in this embodiment, when no SRS transmission is scheduled in a subframe immediately preceding the scheduled subframe, the UE may also perform uplink transmission using the SRS symbol in the immediately preceding subframe, for example: as shown in fig. 4, the base station does not schedule an SRS symbol in an SRS subframe to transmit an SRS, and the CCA gap reserved in the scheduled frame by the base station is used for LBT detection channel access, so that the signaling can indicate the UE1 and the UE2 to perform uplink transmission to occupy the SRS symbol of the SRS subframe, so that the SRS subframe is a complete subframe instead of an original standard 13-symbol incomplete (partial) subframe, where uplink transmission in the drawing is exemplified by uplink data.

Similarly, in this embodiment, the SRS symbol may be the last symbol in the subframe, or the SRS symbol may be another symbol in the subframe, which is not limited in this embodiment.

It should be noted that, the various alternative embodiments described above can be implemented in combination with each other, and can be implemented separately, and are not limited thereto.

It should be noted that the method may be applied to unlicensed frequency band LTE (i.e., LTE-U or U-LTE), that is, the channel may be a channel in an unlicensed frequency band. In addition, the above method may be applied to a UE in the network structure shown in fig. 1.

In this embodiment, indication information sent by a base station is received, a detection resource for performing LBT detection is determined according to the indication information, the LBT detection is performed on the detection resource to access a channel, and the channel is used in a scheduled subframe to perform uplink transmission to the base station. Therefore, the LBT access channel can be realized according to the detection resource determined in the indication information, so that the subframe which can not be accessed to the channel can be avoided, the transmission resource can be saved, and the problem of transmission resource waste is solved.

Based on the network structure shown in fig. 1, an embodiment of the present invention provides another uplink transmission method, as shown in fig. 5, including the following steps:

501. and sending indication information to the UE so that the UE determines detection resources for LBT detection according to the indication information and accesses the channel for the LBT detection in the detection resources.

502. And receiving uplink transmission of the UE in the scheduled subframe by using the channel.

The implementation manners of

steps

501 and 502 may refer to the implementation manners of

steps

201, 202, and 203 in the embodiment shown in fig. 2, and are not described herein again.

As an optional implementation manner, the indication information may indicate that the scheduled subframe is not configured with LBT resources, so that the UE uses a resource of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection.

Optionally, in this embodiment, the detection resource may be an SRS symbol of a subframe previous to the scheduled subframe; or

The detection resource may be an idle resource of a subframe previous to the scheduled subframe.

In this embodiment, refer to the embodiment shown in fig. 2, where the indication information indicates that the scheduled subframe is not configured with LBT resources, and details are not repeated here.

As an optional implementation manner, the indication information may indicate that the scheduled subframe is configured with LBT resources, so that the UE uses the LBT resources in the scheduled subframe as detection resources for performing the LBT operation.

Optionally, in this embodiment, the method may further include the following steps:

the step of receiving uplink transmission performed by the UE in the scheduled subframe using the channel may include:

For the implementation, refer to the implementation of the LBT resource configured by the scheduled subframe indicated by the indication information in the embodiment shown in fig. 2, which is not described herein again.

It should be noted that the method may be applied to unlicensed frequency band LTE (i.e., LTE-U or U-LTE), that is, the channel may be a channel in an unlicensed frequency band. In addition, the above method may be applied to a base station in the network structure shown in fig. 1.

In this embodiment, indication information is sent to the UE, so that the UE determines, according to the indication information, a detection resource for performing LBT detection, performs the LBT detection on the detection resource to access a channel, and receives uplink transmission performed by the UE in a scheduled subframe using the channel. Therefore, the LBT access channel can be carried out on the detection resources determined by the UE through the indication information, so that subframes which cannot be accessed to the channel can be avoided, transmission resources are saved, and the problem of transmission resource waste is solved.

Referring to fig. 6, a structure of a UE is shown, the UE includes the following modules:

a first receiving module 61, configured to receive indication information sent by a base station;

a determining module 62, configured to determine, according to the indication information, a detection resource for performing LBT detection;

a transmission module 63, configured to perform the LBT detection on the access channel in the detection resource, and perform uplink transmission to the base station using the channel in the scheduled subframe.

As an optional implementation manner, the determining module 62 may be configured to use a resource of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection if the indication information indicates that the LBT resource is not configured in the scheduled subframe.

Optionally, in this embodiment, the determining module 62 is configured to use an SRS symbol of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection; or

The determining module 62 may be configured to use a free resource of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection.

As an optional implementation manner, the determining module 62 may be configured to use, if the indication information indicates that the scheduled subframe is configured with LBT resources, the LBT resources in the scheduled subframe as detection resources for performing the LBT operation.

Optionally, in this embodiment, as shown in fig. 7, the UE may further include:

a second receiving module 64, configured to receive a signaling that indicates that the SRS symbol is occupied by the instruction sent by the base station for uplink transmission;

the transmission module 63 may be configured to perform uplink transmission to the base station by using the channel in a resource including an SRS symbol in a scheduled subframe according to the signaling.

In this embodiment, the UE may be the UE in the embodiments shown in fig. 1 to fig. 5, and any implementation of the UE in the embodiments shown in fig. 1 to fig. 5 may be implemented by the UE in this embodiment, which is not described herein again. The UE can save transmission resources.

Referring to fig. 8, there is shown a structure of a base station, which includes the following modules:

a first sending module 81, configured to send indication information to a UE, so that the UE determines, according to the indication information, a detection resource for performing LBT detection, and performs the LBT detection on the detection resource to access a channel.

A receiving module 82, configured to receive uplink transmission performed by the UE in a scheduled subframe using the channel.

Optionally, in this embodiment, as shown in fig. 9, the base station may further include:

a second sending module 83, configured to send, to the UE, a signaling indicating that an SRS symbol is occupied for uplink transmission;

the receiving module 82 may be configured to receive uplink transmission performed by the UE using the channel in a resource including an SRS symbol in a scheduled subframe according to the signaling.

In this embodiment, the base station may be the base station in the embodiments shown in fig. 1 to 5, and any implementation of the base station in the embodiments shown in fig. 1 to 5 may be implemented by the base station in this embodiment, which is not described herein again. The base station can save transmission resources.

Referring to fig. 10, there is shown a structure of a UE including: a processor 1000, a transceiver 1010, a memory 1020, a user interface 1030, and a bus interface, wherein:

the processor 1000, which is used to read the program in the memory 1020, executes the following processes:

receiving, by the transceiver 1010, indication information transmitted by the base station;

determining detection resources for LBT detection according to the indication information;

Among other things, a transceiver 1010 for receiving and transmitting data under the control of the processor 1000.

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 1000 and memory represented by memory 1020. 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 1010 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 1030 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.

As an alternative implementation, the determining, by the processor 1000, the detection resource for performing LBT detection according to the indication information may include:

Optionally, in this embodiment, the taking, by the processor 1000, the resource of the subframe previous to the scheduled subframe as the detection resource for performing the LBT detection may include:

taking a Sounding Reference Signal (SRS) symbol of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection; or

As an alternative embodiment, the determining, by the processor 1000, a detection resource for performing LBT detection according to the indication information may include:

Optionally, in this embodiment, the processor 1000 may further perform the following processes:

the performing, by the processor 1000, uplink transmission to the base station using the channel in the scheduled subframe may include:

Referring to fig. 11, there is shown a structure of a base station including: a processor 1100, a transceiver 1110, a memory 1120, a user interface 1130, and a bus interface, wherein:

the processor 1100, which reads the program in the memory 1120, performs the following processes:

sending indication information to a UE through a transceiver 1110, so that the UE determines, according to the indication information, a detection resource for performing LBT detection, and performs the LBT detection on the detection resource to access a channel;

uplink transmissions by the UE using the channel in the scheduled subframe are received by transceiver 1110.

A transceiver 1110 for receiving and transmitting data under the control of the processor 1100.

Where in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, being linked together. 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 1110 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 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

Optionally, in this embodiment, the processor 1100 may further perform the following processes:

processor 1100 is configured to receive, via transceiver 1110, uplink transmissions by the UE in the scheduled subframes using the channel, including:

receiving, by the transceiver 1110, uplink transmission by the UE using the channel in a resource including a SRS symbol in a scheduled subframe according to the signaling.

Referring to fig. 12, there is shown a structure of an uplink transmission system including:

a base station 121 configured to send indication information to a UE 122;

the UE122 is configured to receive indication information sent by a base station;

the UE122 is further configured to determine, according to the indication information, a detection resource for performing LBT detection;

UE122 is further configured to perform the LBT detection on the detection resources to access a channel, and perform uplink transmission to the base station using the channel in a scheduled subframe;

the base station 121 is further configured to receive uplink transmission of the UE122 in the scheduled subframe using the channel.

In this embodiment, the base station 121 and the UE122 may be the base station and the UE introduced in the embodiments shown in fig. 1 to 11, and embodiments thereof may refer to the embodiments shown in fig. 1 to 11, and the same technical effect may also be achieved, which is not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An uplink transmission method, comprising:

receiving indication information sent by a base station;

determining detection resources for carrying out Listen Before Talk (LBT) detection according to the indication information;

performing the LBT detection on the detection resources to access a channel, and performing uplink transmission on the channel to the base station in a scheduled subframe;

wherein, the determining the detection resource for performing the LBT detection according to the indication information includes:

2. The method of claim 1, wherein the taking a resource of a subframe previous to the scheduled subframe as a detection resource for the LBT detection comprises:

3. The method of any of claims 1-2, wherein the determining detection resources for LBT detection from the indication information comprises:

4. The method of claim 3, wherein the method further comprises:

5. An uplink transmission method, comprising:

receiving uplink transmission of the UE in a scheduled subframe by using the channel;

wherein the indication information indicates that the scheduled subframe is not configured with LBT resources, so that the UE takes resources of a subframe previous to the scheduled subframe as detection resources for the LBT detection.

6. The method of claim 5, wherein the detection resource is a SRS symbol of a subframe previous to the scheduled subframe; or

7. The method of claim 5, wherein the indication information indicates that the scheduled subframe is configured with LBT resources for the UE to use the LBT resources in the scheduled subframe as detection resources for performing the LBT operation.

8. The method of claim 7, wherein the method further comprises:

9. A UE, comprising:

a transmission module, configured to perform the LBT detection on the detection resource to access a channel, and perform uplink transmission to the base station using the channel in a scheduled subframe;

wherein, the determining module is configured to use a resource of a subframe previous to the scheduled subframe as a detection resource for performing the LBT detection if the indication information indicates that the scheduled subframe is not configured with LBT resources.

10. The UE of claim 9, wherein the determining module is to use a SRS symbol of a previous subframe of the scheduled subframe as a detection resource for the LBT detection; or

11. The UE of any one of claims 9-10, wherein the determining module is to use LBT resources in the scheduled subframe as detection resources for performing the LBT operation if the indication information indicates that the scheduled subframe is configured with LBT resources.

12. The UE of claim 11, wherein the UE further comprises:

13. A base station, comprising:

a receiving module, configured to receive uplink transmission performed by the UE in a scheduled subframe using the channel;

14. The base station of claim 13, wherein the detection resource is a SRS symbol of a subframe previous to the scheduled subframe; or

15. The base station of claim 13, wherein the indication information indicates that the scheduled subframe is configured with LBT resources such that the UE uses the LBT resources in the scheduled subframe as detection resources for performing the LBT operation.

16. The base station of claim 15, wherein the base station further comprises:

17. An uplink transmission system, comprising:

the base station is used for sending the indication information to the UE;

the base station is further used for receiving uplink transmission of the UE in the scheduled subframe by using the channel;