Method and device for transmitting downlink control information dci
A technology for controlling information and transmission modes, applied in the field of communication, can solve problems affecting downlink transmission of base stations, mismatch between channel state and transmission mode, affecting system efficiency and user experience, etc.
Inactive Publication Date: 2018-01-23
HUAWEI TECH CO LTD
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However, since the channel states between the multiple serving base stations and the UE will not be exactly the same, if the multiple base stations still use the same default transmission mode to perform downlink transmission to the UE, it is likely that some or all of the channels between the base stations and the UE The state does not match the transmission mode, which will affect the downlink transmission effect of the base station to the UE, thereby affecting system efficiency and user experience
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[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0048] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: Global System of Mobile communication (Global System of Mobile communication, referred to as "GSM") system, Code Division Multiple Access (Code Division Multiple Access, referred to as "GSM") system, CDMA") system, Wideband Code Division Multiple Access (referred to as "WCDMA") system, General ...
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The invention discloses a method and device for transmitting DCI. The method includes: determining a transmission mode respectively adopted by at least two serving base stations of the UE of a user equipment UE when performing downlink transmission to the UE; sending first indication information to the UE, where the first indication information is used for Indicate the at least two transmission modes; and send second indication information to the UE, where the second indication information is used to indicate the time-frequency resources respectively occupied by the DCI transmitted in each transmission mode. In the method for transmitting DCI according to the embodiment of the present invention, a corresponding transmission mode is configured for each serving base station of a UE through a network device, so that each serving base station can use an appropriate transmission mode for downlink transmission, and the UE is in Different time-frequency resources use corresponding transmission modes to blindly detect DCI, thereby improving system efficiency, reducing the complexity and blind detection efficiency of UE blind detection, and improving user experience.
Description
technical field [0001] The embodiments of the present invention relate to the communication field, and more specifically, to a method and device for transmitting downlink control information DCI. Background technique [0002] In a wireless network communication system, a base station transmits data to a user equipment (User Equipment, "UE" for short) through downlink transmission. When the UE receives downlink data, it is roughly divided into two steps: first, the UE receives downlink control signaling (Downlink Control Information, referred to as "DCI"), and the DCI instructs the UE to perform a series of actions, including instructing the UE how to receive downlink data, How to send uplink data, how to adjust the transmit power, etc.; secondly, after the UE correctly receives the DCI, it then receives the real downlink data according to the instructions received from the DCI. In order to help the UE determine the purpose of the received DCI, the DCI in the Long Term Evolu...
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IPC IPC(8): H04L1/00H04L5/00
CPCH04L5/0094H04W72/23
Inventor 李强薛丽霞
Owner HUAWEI TECH CO LTD