CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is based on International Application No. PCT/CN2017/080523 filed Apr. 14, 2017, which claims priority to Chinese Patent Application No. 201610266884.4, filed on Apr. 26, 2016, the contents of which are incorporated herein by reference in its entirety.

The present disclosure claims priority to Chinese Patent Application No. 201610266884.4, filed to the Chinese Patent Office on Apr. 21, 2016 and titled “Uplink transmission method and device, user terminal and base station”, the content of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of communication technologies, and in particular to an uplink transmission method, an uplink transmission device, a user terminal and a base station.

BACKGROUND

A mobile communication system means a system by which an operator provides communication services for a user terminal (e.g., a mobile phone) by deploying a wireless access network device (e.g., a base station), a core network device (e.g., a Home Location Register, HLR), etc. Mobile communication has experienced the first, second, third and fourth generations. The first generation of mobile communication means an original analog voice-only cellular phone standard, mainly using the analog technology and the Frequency Division Multiple Access (FDMA) method. The second generation of mobile communication introduces the digital technology to improve the network capacity, the voice quality and confidentiality, represented by Global System for Mobile Communication (GSM) and Code Division Multiple Access (CDMA IS-95). The third generation of mobile communication mainly means three technologies of CDMA2000, WCDMA and TD-SCDMA, all of which are based on the CDMA. The fourth generation of mobile communication has relatively internationally unified standards, is Long Term Evolution/Long Term Evolution-Advanced (LTE/LTE-A) established by 3GPP (the 3rd Generation Partnership Project) of the International Organization for Standardization, has an access manner in which the downlink is based on Orthogonal Frequency Division Multiple Access (OFDMA) and the uplink is based on Single Carrier-Frequency Division Multiple Access (SC-FDMA), and achieves high-speed transmission with a downlink peak value of 1 Gbps and an uplink peak value of 500 Mbps based on a flexible bandwidth and a self-adaptive modulation and coding mode.

The followingFIG. 1briefly shows a basic structure of a mobile communication network, in which a terminal establishes a communication connection with a core network via an access network.

MulteFire is an LTE technology which redefines the uplink transmission method based on the LTE R13 LAA downlink transmission method and can independently work in a non-licensed frequency band, namely, stand-alone LTE-U. In the existing LTE, the physical uplink shared channel (PUSCH) transmission is scheduled by an evolved node base station (eNB) transmitting uplink (UL) grants.

For example, in an LTE-FDD system, an eNB transmits a UL grant in an n-th subframe, and a UE transmits a PUSCH in an (n+4)th subframe. In LTE R14 eLAA and MulteFire, uplink data transmission in non-licensed frequency bands is supported. As Listen Before Talk (LBT) is required when transmitting uplink data in non-licensed frequency bands, both UL grant and PUSCH require LBT.

In eLAA and MulteFire, the access priority level selected by an eNB determines the LBT parameters and the maximum allowable channel occupation time (the longer the random backoff time is, the lower the access priority level is and the longer the maximum allowable channel occupation time is; and vice versa). The maximum allowable channel occupation time is called MCOT in eLAA/LAA, and is called transmission opportunity (TXOP) in MulteFire. But later, it is uniformly described as TXOP.

As shown inFIG. 2, when the scheduled PUSCH of a UE is within the TXOP corresponding to the LBT cat-4 used by an eNB when transmitting a downlink (or the downlink of the eNB occupies only a part of the TXOP, and the remaining TXOP can be used by the uplink), the LBT of the UE can perform LBT cat-2 for only 25 us. When the scheduled PUSCH of the UE is outside the TXOP corresponding to the LBT used by the eNB when transmitting a downlink, MulteFire specifies that the UE needs to perform LBT cat-4. In addition, both eLAA and MulteFire support the manner of scheduling using one UL grant for the PUSCH transmission over multiple subframes. When using one UL grant to schedule the PUSCH transmission over multiple subframes, due to restrictions of the TXOP of the eNB, the transmission can only be scheduled to be within the TXOP. The terminals scheduled outside the TXOP of the eNB need to use another type of LBT and require individual UL grants for scheduling, so that the number of UL grants is increased, and the downlink resource overhead is increased.

SUMMARY

The present disclosure provides an uplink transmission method, an uplink transmission device, a user terminal and a base station to solve the problem in the prior art that the uplink channels within and outside a transmission opportunity of a base station require different uplink scheduling information for scheduling so that the downlink channel resource overhead is excessively large.

Embodiments of the present disclosure provide an uplink transmission method applied in a user terminal and including: acquiring uplink scheduling information transmitted by a base station and indication information of a transmission opportunity currently occupied by the base station; determining a position of an uplink channel scheduled for the user terminal by the base station in accordance with the uplink scheduling information; determining a listening type of the uplink channel in accordance with the position of the uplink channel and the indication information of the transmission opportunity, wherein a listening type used when the uplink channel is within the transmission opportunity is different from a listening type used when the uplink channel is outside the transmission opportunity; and transmitting uplink data to the base station in the uplink channel when the uplink channel is listened to be in an idle state using the listening type of the uplink channel

Another aspect of the present disclosure provides an uplink transmission method applied in a base station and including: transmitting uplink scheduling information and indication information of a transmission opportunity currently occupied by the base station to a user terminal, such that the user terminal determines a position of an uplink channel scheduled by the base station for the user terminal in accordance with the uplink scheduling information, and determines a listening type of the uplink channel in accordance with the position of the uplink channel and the indication information of the transmission opportunity, wherein a listening type used when the uplink channel is within the transmission opportunity is different from a listening type used when the uplink channel is outside the transmission opportunity; and receiving uplink data transmitted by the user terminal in an uplink channel which is listened to be in an idle state using the listening type of the uplink channel.

Yet another aspect of the present disclosure provides an uplink transmission device applied in a user terminal and including: an acquiring module configured to acquire uplink scheduling information transmitted by a base station and indication information of a transmission opportunity currently occupied by the base station; a first processing module configured to determine a position of an uplink channel scheduled for the user terminal by the base station in accordance with the uplink scheduling information; a second processing module configured to determine a listening type of the uplink channel in accordance with the position of the uplink channel and the indication information of the transmission opportunity, wherein a listening type used when the uplink channel is within the transmission opportunity is different from a listening type used when the uplink channel is outside the transmission opportunity; and a first transmitting module configured to transmit uplink data to the base station in the uplink channel when the uplink channel is listened to be in an idle state using the listening type of the uplink channel.

Yet another aspect of the present disclosure provides an uplink transmission device applied in a base station and including: a second transmitting module configured to transmit uplink scheduling information and indication information of a transmission opportunity currently occupied by the base station to a user terminal, such that the user terminal determines a position of an uplink channel scheduled by the base station for the user terminal in accordance with the uplink scheduling information, and determines a listening type of the uplink channel in accordance with the position of the uplink channel and the indication information of the transmission opportunity, wherein a listening type used when the uplink channel is within the transmission opportunity is different from a listening type used when the uplink channel is outside the transmission opportunity; and a receiving module configured to receive uplink data transmitted by the user terminal in an uplink channel which is listened to be in an idle state using the listening type of the uplink channel.

Yet another aspect of the present disclosure provides a user terminal including: a receiver configured to acquire uplink scheduling information transmitted by a base station and indication information of a transmission opportunity currently occupied by the base station; a processor connected to the receiver and configured to: determine a position of an uplink channel scheduled for the user terminal by the base station in accordance with the uplink scheduling information; and determine a listening type of the uplink channel in accordance with the position of the uplink channel and the indication information of the transmission opportunity, wherein a listening type used when the uplink channel is within the transmission opportunity is different from a listening type used when the uplink channel is outside the transmission opportunity; and a transmitter configured to transmit uplink data to the base station in the uplink channel when the uplink channel is listened to be in an idle state using the listening type of the uplink channel.

Yet another aspect of the present disclosure provides a base station including: a transmitter configured to transmit uplink scheduling information and indication information of a transmission opportunity currently occupied by the base station to a user terminal, such that the user terminal determines a position of an uplink channel scheduled by the base station for the user terminal in accordance with the uplink scheduling information, and determines a listening type of the uplink channel in accordance with the position of the uplink channel and the indication information of the transmission opportunity, wherein a listening type used when the uplink channel is within the transmission opportunity is different from a listening type used when the uplink channel is outside the transmission opportunity; and a receiver configured to receive uplink data transmitted by the user terminal in an uplink channel which is listened to be in an idle state using the listening type of the uplink channel.

Embodiments of the present disclosure further provide a non-transitory computer-readable storage medium storing computer instructions configured to cause a computer to perform the uplink transmission method applied in a user terminal described as above in the present disclosure.

Embodiments of the present disclosure further provide a non-transitory computer-readable storage medium storing computer instructions configured to cause a computer to perform the uplink transmission method applied in a base station described as above in the present disclosure.

Embodiments of the present disclosure further provide a computer program product, including a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions which, when executed by a computer, cause the computer to perform the uplink transmission method applied in a user terminal described as above in the present disclosure.

Embodiments of the present disclosure further provide a computer program product, including a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions which, when executed by a computer, cause the computer to perform the uplink transmission method applied in a base station described as above in the present disclosure.

The above technical solutions of the present disclosure can produce the following advantageous effects.

The base station transmits the indication information of the transmission opportunity used by itself to the user terminal, such that the user terminal can determine the positional relationship between the uplink channel scheduled for the user terminal and the transmission opportunity used by the base station in accordance with the uplink scheduling information and the indication information of the transmission opportunity, and can automatically determine and switch the listening type at different positions. The listening type used when the uplink channel is within the transmission opportunity is different from the listening type used when the uplink channel is outside the transmission opportunity. In this way, when the base station schedules multiple subframes for the user terminal requesting for uplink scheduling, the number of scheduled subframes will not be restricted by the current transmission opportunity, and the base station only needs to send the uplink scheduling information once. Thus, the downlink channel resource overhead can be reduced, and the network resources can be saved.

