Method and device for realizing downlink data transmission by utilizing 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: 2014-01-15
ZTE CORP
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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 d

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  • Method and device for realizing downlink data transmission by utilizing active antenna system
  • Method and device for realizing downlink data transmission by utilizing active antenna system
  • Method and device for realizing downlink data transmission by utilizing active antenna system

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Example Embodiment

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

[0044] According to the number of beams in the downlink activated beam set of the user, open loop diversity is used to transmit the downlink data of the user or the downlink data of the user in the downlink activated beam set; the space between the respective downlink activated beam sets of the paired users is used. The downlink data is transmitted in a division multiple access mode, where users with no intersection in the downlink activated beam sets constitute paired users.

[0045] The above method can be directed to vertical beams or horizontal beams, for example, open-loop diversity transmission is performed on the downlink vertic...

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Abstract

The invention discloses a method and device for realizing downlink data transmission by utilizing an active antenna system. The method is characterized in that: constituting wave beams, the uplink receiving power is larger than a preset threshold, of all wave beams in physical resource of a user into a downlink activation wave beam collection of the user; according to the number of the wave beams in the downlink activation wave beam collection of the user, sending downlink data of the user by utilizing open loop diversity technique or directly sending the downlink data of the user in the downlink activation wave beam collection; and sending the downlink data by utilizing a space division multiple access mode in downlink activation wave beam collections of matched users, wherein the users, the downlink activation wave beam collections do not have intersections, form the matched users. Multi-beam activation determination and the pen loop diversity sending and combined and the method is utilized to solve the problem of related interference in vertical wave beams or horizontal wave beams, thereby preventing performance loss of a downlink data channel due to interference in the LTE system, and improving data traffic 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 Antenna System) 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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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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