CROSS REFERENCE TO RELATED APPLICATIONS

This is the U.S. national stage of application No. PCT/CN2019/088222, filed on May 24, 2019. Priority under 35 U.S.C. § 119(a) and 35 U.S.C. § 365(b) is claimed from Chinese Application No. 201810551006.6, filed May 31, 2018, and entitled “TRANSMISSION CONTROL METHOD AND APPARATUS FOR DOWNLINK CONTROL INFORMATION, AND STORAGE MEDIUM, BASE STATION AND TERMINAL”, the entire disclosure of which is also incorporated herein by reference.

TECHNICAL FIELD

The present disclosure generally relates to radio communication technology field, and more particularly, to transmission control methods and apparatuses for downlink control information, a storage medium, a base station and a terminal.

BACKGROUND

In a New Radio (NR) access system, a base station can make a User Equipment (UE) detect its own Downlink Control Information (DCI) in one or more Control Resource Sets (CORESETs) according to its Radio Network Temporary Identifier (RNTI). For example, for a scenario where carrier aggregation is not considered, if the UE works on a carrier, the base station can make the UE detect search spaces in one or more CORESETs on the carrier, detect its own DCI according to its own RNTI, and receive data or upload data according to the DCI.

Single DCI is carried by at least one Control Channel Element (CCE). The number of CCEs carrying the single DCI is called Aggregation Level (AL), and the AL may be 1, 2, 4, 8 or 16. In existing NR standards, merely a single CCE including 6 Resource Element Groups (REGs) is supported. Each REG refers to a single Resource Block (RB) that occupies an Orthogonal Frequency Division Multiplexing (OFDM) symbol duration, that is, each REG includes 12 consecutive Resource Elements (REs) in a frequency domain.

At present, if available resources to carry the DCI do not match resources required to transmit the DCI, it may cause a waste of resources, and reduce the number of UEs scheduled by a network.

SUMMARY

Embodiments of the present disclosure may improve resource utilization by providing solutions of how to transmit DCI.

In an embodiment of the present disclosure, a transmission control method for DCI is provided, including: receiving UE capability information from a UE, wherein the UE capability information includes indication information indicating whether enhanced CCE is supported; and determining whether to use the enhanced CCE to schedule the UE based on the UE capability information, wherein if the enhanced CCE is used to schedule the UE, the number of REGs included in a single CCE is selected from a first set, if the enhanced CCE is not used to schedule the UE, the number of REGs included in a single CCE is selected from a second set, and the first set is different from the second set.

Optionally, if it is determined that the enhanced CCE is used to schedule the UE, the method further includes: transmitting first configuration information or second configuration information to the UE, to indicate for the UE that the enhanced CCE is used to schedule the UE.

Optionally, the first configuration information includes at least two elements in the first set, and the second configuration information includes a single element in the first set.

Optionally, the first set is {4, 8, 10}.

Optionally, the first configuration information further includes a DCI format associated with each of the at least two elements, and the second configuration information further includes a DCI format associated with the single element.

Optionally, the first configuration information further includes a control resource set and/or a search space associated with each of the at least two elements, and the second configuration information further includes a control resource set and/or a search space associated with the single element.

Optionally, after transmitting the first configuration information, the method further includes: receiving a measurement report from the UE; determining the number of the REGs included in the single CCE based on the measurement report; and transmitting third configuration information to the UE, so that the UE decodes the DCI based on the third configuration information, wherein the third configuration information includes the number of the REGs included in the single CCE.

Optionally, transmitting third configuration information to the UE includes: transmitting the third configuration information to the UE based on Media Access Control (MAC) layer control element signaling.

Optionally, before transmitting the second configuration information, the method further includes: receiving a measurement report from the UE; and determining the number of the REGs included in the single CCE based on the measurement report and the UE capability information.

Optionally, the UE operates on a plurality of serving cells, and transmitting first configuration information or second configuration information to the UE includes: transmitting the first configuration information or the second configuration information to the UE on at least one of the plurality of serving cells.

Optionally, the first configuration information or the second configuration information is transmitted through Radio Resource Control (RRC) signaling.

Optionally, the second set is {6}.

In an embodiment of the present disclosure, a transmission control method for DCI is provided, including: a UE transmitting UE capability information to a network, wherein the UE capability information includes indication information indicating whether enhanced CCE is supported; and if the network determines to use the enhanced CCE to schedule based on the UE capability information, using the enhanced CCE to decode the DCI, wherein if the enhanced CCE is used to decode the DCI, the number of REGs included in a single CCE is selected from a first set, if the enhanced CCE is not used to decode the DCI, the number of REGs included in a single CCE is selected from a second set, and the first set is different from the second set.

Optionally, before using the enhanced CCE to decode the DCI, the method further includes: receiving first configuration information or second configuration information from the network.

Optionally, the first configuration information includes at least two elements in the first set, and the second configuration information includes a single element in the first set.

Optionally, the first set is {4, 8, 10}.

Optionally, the first configuration information further includes a DCI format associated with each of the at least two elements, and the second configuration information further includes a DCI format associated with the single element.

Optionally, the first configuration information further includes a control resource set and/or a search space associated with each of the at least two elements, and the second configuration information further includes a control resource set and/or a search space associated with the single element.

Optionally, after receiving the first configuration information, the method further includes: transmitting a measurement report to the network, so that the network determines the number of the REGs included in the single CCE; and receiving third configuration information from the network to decode the DCI, wherein the third configuration information includes the number of the REGs included in the single CCE.

Optionally, receiving third configuration information from the network includes: receiving the third configuration information from the network based on MAC layer control element signaling.

Optionally, before receiving the second configuration information, the method further includes: transmitting a measurement report to the network, so that the network determines the number of the REGs included in the single CCE based on the measurement report and the UE capability information.

Optionally, the UE operates on a plurality of serving cells, and receiving first configuration information or second configuration information from the network includes: receiving the first configuration information or the second configuration information from the network on at least one of the plurality of serving cells.

Optionally, the first configuration information or the second configuration information is transmitted through RRC signaling.

Optionally, the second set is {6}.

In an embodiment of the present disclosure, a transmission control apparatus for DCI is provided, including: a first receiving circuitry, configured to receive UE capability information from a UE, wherein the UE capability information includes indication information indicating whether enhanced CCE is supported; and a first determining circuitry, configured to determine whether to use the enhanced CCE to schedule the UE based on the UE capability information, wherein if the enhanced CCE is used to schedule the UE, the number of REGs included in a single CCE is selected from a first set, if the enhanced CCE is not used to schedule the UE, the number of REGs included in a single CCE is selected from a second set, and the first set is different from the second set.

In an embodiment of the present disclosure, a transmission control apparatus for DCI is provided, including: a first transmitting circuitry, configured to transmit UE capability information to a network, wherein the UE capability information includes indication information indicating whether enhanced CCE is supported; and a decoding circuitry, configured to: if the network determines to use the enhanced CCE to schedule based on the UE capability information, use the enhanced CCE to decode the DCI, wherein if the enhanced CCE is used to decode the DCI, the number of REGs included in a single CCE is selected from a first set, if the enhanced CCE is not used to decode the DCI, the number of REGs included in a single CCE is selected from a second set, and the first set is different from the second set.

In an embodiment of the present disclosure, a storage medium having computer instructions stored therein is provided, wherein when the computer instructions are executed, any one of the above methods is performed.

In an embodiment of the present disclosure, a base station including a memory and a processor is provided, wherein the memory has computer instructions stored therein, and when the processor executes the computer instructions, the above first method is performed.

In an embodiment of the present disclosure, a terminal including a memory and a processor is provided, wherein the memory has computer instructions stored therein, and when the processor executes the computer instructions, the above second method is performed.

Embodiments of the present disclosure may provide following advantages.

Embodiments of the present disclosure provide a transmission control method for DCI, including: receiving UE capability information from a UE, wherein the UE capability information includes indication information indicating whether enhanced CCE is supported; and determining whether to use the enhanced CCE to schedule the UE based on the UE capability information, wherein if the enhanced CCE is used to schedule the UE, the number of REGs included in a single CCE is selected from a first set, if the enhanced CCE is not used to schedule the UE, the number of REGs included in a single CCE is selected from a second set, and the first set is different from the second set. With the embodiments, CCEs including different numbers of REGs are provided, so that the network can flexibly select CCEs to schedule UEs based on channel transmission quality, which enables to use fewer resources to schedule UEs to improve resource utilization. As a result, under a same resource condition, the number of UEs scheduled by the network is increased.

Further, the first set is {4, 8, 10}. With the embodiments, the number of the REGs included in the single CCE when the enhanced CCE is used to schedule UE is provided, which may further reduce complexity of decoding the DCI by the UE.

Further, the first configuration information further includes a DCI format associated with each of the at least two elements, and the second configuration information further includes a DCI format associated with the single element. With the embodiments, the DCI format for enhanced CCE decoding is provided, so that the UE uses the enhanced CCE to decode merely in the DCI format, and still use an existing CCE to decode in other DCI formats, thereby improving decoding efficiency.

Further, the third configuration information is transmitted to the UE based on MAC layer control element signaling. With the embodiments, the UE may rapidly determine the number of the REGs included in the single CCE after receiving the third configuration information, which may improve decoding efficiency of the DCI.

