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A method and device for realizing downlink data transmission by using an active antenna system

A downlink data and system implementation technology, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve problems such as multi-sector interference, achieve the effects of reducing interference, facilitating engineering implementation, and improving system capacity

Active Publication Date: 2018-03-02
ZTE CORP
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  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a downlink data transmission method and device using an active antenna system to solve the interference problem between vertical or horizontal multi-sectors of AAS

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  • A method and device for realizing downlink data transmission by using an active antenna system
  • A method and device for realizing downlink data transmission by using an active antenna system
  • A method and device for realizing downlink data transmission by using an active antenna system

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Embodiment Construction

[0042] Such as figure 1 As shown, the method for implementing downlink data transmission using an active antenna system applied to an LTE or LTE-A system includes:

[0043]Combining the beams with uplink receiving power greater than the preset threshold among the beams of the user on the physical resources to form the user's downlink active beam set;

[0044] According to the number of beams in the user's downlink active beam set, transmit the user's downlink data by using open-loop diversity in the downlink active beam set or directly transmit the user's downlink data; The downlink data is transmitted in a divisional multiple access manner, wherein users whose sets of downlink active beams do not overlap constitute paired users.

[0045] The above method can be aimed at vertical beams or horizontal beams, for example, open-loop diversity transmission is performed on downlink vertical active beams and downlink horizontal active beams respectively, which can respectively solve...

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Abstract

The invention discloses a method and device for realizing downlink data transmission by using an active antenna system. The beams whose uplink reception power is greater than a preset threshold among the beams of a user on physical resources are formed into the user's downlink activation beam set; according to the user's The number of beams in the downlink active beam set uses open-loop diversity to transmit the user's downlink data or directly transmits the user's downlink data in the downlink active beam set; uses space division multiple access between the respective downlink active beam sets of the paired users Downlink data is transmitted in a manner in which users whose sets of downlink active beams do not overlap constitute paired users. This solution uses the combination of multi-beam activation determination and open-loop diversity transmission to solve the problem of related interference between vertical beams or horizontal beams, avoiding the performance loss of the downlink data channel in the LTE system due to interference, and improving data flow and system performance.

Description

technical field [0001] The present invention relates to a method for transmitting downlink data using an Active Antenna System (AAS, Active AntennaSystem) in a wireless communication system, in particular to long-term evolution (LTE, Long Term Evolution) or evolved long-term evolution (LTE-A, Long Term Evolution -Advanced) system realizes downlink data transmission method and device. Background technique [0002] With the continuous development of the third generation (3G) mobile communication system, LTE was proposed in 3GPP. Due to the advantages of higher user data rate, improved system capacity and coverage, and reasonable and flexible spectrum resource allocation, LTE It has developed rapidly, and many operators are currently planning or deploying LTE systems. The LTE wireless communication system is a new generation of wireless network based on Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing). ), high-order modulation, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
Inventor 李斌史凡秦洪峰向际鹰黄沛瑜
Owner ZTE CORP
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