Method and device for implementing downlink transmission in millimeter wave system
A millimeter-wave, physical downlink technology, applied in transmission systems, digital transmission systems, multiple uses of transmission paths, etc., can solve the problems of transmission gaps in downlink control channels, failure to meet the requirements of signal-to-noise ratio and signal coverage, etc.
Active Publication Date: 2019-11-22
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology
However, in the mmWave channel environment, the schemes about the transmission of the downlink control channel and the channel measurement for the data channel are still blank
In 4G LTE / LTE-A, channel measurement and demodulation of the Physical Downlink Control Channel (PDCCH) are performed based on non-precoded CRS, however for mmWave, due to the characteristics of the above mmWave channel, it is reused in the mmWave system The transmission scheme of the LTE control channel cannot meet the requirements of signal-to-noise ratio and signal coverage
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[0030] In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings, which form a part of this disclosure. The accompanying drawings show, by way of example, specific embodiments in which the present disclosure can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the present disclosure. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. Accordingly, the following detailed description is not limiting, and the scope of the present disclosure is defined by the appended claims. In addition, although the specification describes steps of a method in a particular order, this does not require or imply that operations must be performed in that particular order, or that all illustrated operations must be performed to achieve desirable results. Rather, the depi...
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The embodiment of the invention discloses a method of executing downlink transmission in a base station end of a millimeter wave system and a device thereof. The method comprises steps: downlink reference signals are determined for each user side; one port for executing downlink transmission is allocated for the downlink reference signals of each user side; the downlink reference signals corresponding to each port are mapped to at least one resource element; and the corresponding downlink reference signals are transmitted on the at least one resource element. The embodiment of the invention also discloses a method of executing downlink transmission in a user side of the millimeter wave system and a device thereof. The method comprises steps: downlink reference signals are acquired from at least one resource element in a resource sub area; and the downlink reference signals are used for demodulating a physical downlink control channel and / or a physical downlink data channel.
Description
technical field [0001] Embodiments of the present disclosure relate to the field of wireless communication, and in particular, to a method and device for implementing downlink transmission in a millimeter wave system. Background technique [0002] The goal of the 5G physical layer is to provide better performance in data rate and latency while reducing cost and power consumption. To meet the gigabit-per-second data rate requirements of next-generation mobile cellular communications standards, one option is to take advantage of the available broadband in the mmWave frequency bands. When working in the mmWave frequency band, there are some unfavorable propagation characteristics in wireless channels, including strong path loss, atmospheric and rainwater absorption, low diffraction around barricades, and barrier penetration. [0003] To overcome these unfavorable propagation characteristics, large arrays and narrow beams are considered as an important technique for data transm...
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IPC IPC(8): H04L5/00
CPCH04L5/0048H04L5/0053
Inventor 孙芳蕾孙欢杨涛
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD