Data transmission method and device, base station and user equipment

A data transmission method, comprising:

• receiving a pre-scheduling signaling sent before a base station competes for an unlicensed carrier, the pre-scheduling signaling for instructing a User Equipment (UE) to transmit data on an unlicensed carrier obtained by competition;
• and
• transmitting the data with the base station according to the pre-scheduling signaling;
• wherein before transmitting the data with the base station according to the pre-scheduling signaling, the method further comprises:
• receiving a scheduling update signaling, sent by the base station, for updating the pre-scheduling signaling;
• and transmitting the data with the base station according to the pre-scheduling signaling comprises:
• transmitting the data with the base station according to the pre-scheduling signaling and the scheduling update signaling;
• wherein transmitting the data with the base station according to the pre-scheduling signaling comprises at least one of the following:
• when subframe position instruction information about data transmission does not exist in the pre-scheduling signaling and/or the scheduling update signaling, transmitting the data with the base station according to a subframe position determined by a pre-set rule, the pre-set rule comprises:
• determining the subframe position for transmitting the data with the base station by comparing a receiving time of the pre-scheduling signaling with a time of obtaining resource by competition;
• when subframe position instruction information for instructing a subframe position for transmitting the data with the base station exists in the pre-scheduling signaling and/or the scheduling update signaling, transmitting the data with the base station according to the subframe position instructed by the subframe position instruction information;
• and transmitting the data with the base station on a nearest uplink subframe after the UE obtains resources by competition.

A data transmission device, comprising:

• a first sending device, configured to send a pre-scheduling signaling to a User Equipment (UE) before competing for an unlicensed carrier, the pre-scheduling signaling for instructing the UE to transmit data on an unlicensed resource obtained by competition;
• and
• a first transmission module, configured to transmit the data with the UE according to the pre-scheduling signaling;
• wherein the device further comprises:
• a second sending module, configured to send, before transmitting the data with the UE according to the pre-scheduling signaling, a scheduling update signaling for updating the pre-scheduling signaling to the UE, wherein the first transmission module is further configured to transmit the data with the UE according to the pre-scheduling signaling and the scheduling update signaling;
• wherein the second sending module is further configured to send the scheduling update signaling for updating the pre-scheduling signaling to the UE under at least one of the following conditions:
• after the pre-scheduling signaling is sent to the UE and before competing for the unlicensed carrier, acquiring uplink channel state information updated by the UE, and when a channel state change exceeds a pre-defined threshold, sending the scheduling update signaling to the UE;
• when the UE corresponding to the pre-scheduling signaling does not meet requirements for preempting the bandwidth of the unlicensed carrier, sending the scheduling update signaling to the UE;
• and when the UE corresponding to the pre-scheduling signaling has a new SR or the BSR is greater than a pre-set value, sending the scheduling update signaling to the UE.

A data transmission device, comprising:

• a first receiving module, configured to receive a pre-scheduling signaling sent before a base station competes for an unlicensed carrier, the pre-scheduling signaling for instructing a User Equipment (UE) to transmit data on an unlicensed resource obtained by competition;
• and
• a second transmission module, configured to transmit the data with the base station according to the pre-scheduling signaling;
• wherein the device further comprises:
• a second receiving module, configured to receive a scheduling update signaling, sent by the base station, for updating the pre-scheduling signaling before transmitting the data with the base station according to the pre-scheduling signaling, wherein the second transmission module is further configured to transmit the data with the base station according to the pre-scheduling signaling and the scheduling update signaling;
• wherein the second transmission module comprises at least one of the following:
• a fifth transmission unit, configured to transmit, when subframe position instruction information about data transmission does not exist in the pre-scheduling signaling and/or the scheduling update signaling, the data with the base station according to a subframe position determined by a pre-set rule, the pre-set rule comprising:
• determining the subframe position for transmitting the data with the base station by comparing a receiving time of the pre-scheduling signaling with a time of obtaining resource by competition;
• a sixth transmission unit, configured to transmit, when subframe position instruction information for instructing a subframe position for transmitting the data with the base station exists in the pre-scheduling signaling and/or the scheduling update signaling, the data with the base station according to the subframe position instructed by the subframe position instruction information;
• and a seventh transmission unit, configured to transmit the data with the base station on a nearest uplink subframe after the UE obtains resources by competition.