Antenna device and base station device

An antenna device and base station technology, which is applied to antennas, antenna parts, diversity/multi-antenna systems, etc., can solve problems without any ground considerations, and achieve the effect of high-efficiency data transmission

Inactive Publication Date: 2011-10-12
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in Non-Patent Document 1, no consideration is given to the transmission mode

Method used

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  • Antenna device and base station device
  • Antenna device and base station device
  • Antenna device and base station device

Examples

Experimental program
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Effect test

no. 1 approach

[0057] An example of antenna tilt suitable for a case where different array antennas are used according to transmission modes in the first embodiment will be described. Figure 2A with Figure 2B It is a diagram showing an example of the transmission antenna device (antenna device) 200 of the base station device according to this embodiment. The transmitting antenna device 200 has an array antenna (MIMO array) 201 for MIMO mode transmission and an array antenna (BF array) 202 for BF mode transmission. Add θ to the MIMO array 201 in the elevation direction 1 , and add θ to the BF array 202 in the elevation direction 2 The inclination angle (down-tilt angle). At this time, the θ 1 set to ratio θ 2 A large value (absolute value) (θ 2 can be 0). Thus, beam 203 transmitted from MIMO array 201 is directed toward a mobile station device located closer to the transmitting device than beam 204 transmitted from BF array 202 . In addition, in this embodiment, an example is shown ...

no. 2 approach

[0067] An example in which the antenna is physically tilted in the elevation direction when the downtilt is added in the first embodiment has been described. In this embodiment, each antenna element is further composed of a plurality of elements. Thus, instead of physically tilting the antenna in the elevation direction, the tilt angle is set by giving a phase difference when powering these elements.

[0068] Figure 3A with Figure 3B It is a figure which shows an example of the structure of the antenna element concerning this embodiment. The antenna element 301 further has a plurality of elements 301-1 to 301-3. When power is supplied to the elements 301-1 to 301-3 through the power supply line 302, a phase difference is imparted between 301-1 and 301-2 and between 301-2 and 301-3 by using delay elements 303 and 304 . Accordingly, it is possible to add a tilt angle to the antenna pattern 305 in the elevation direction of the antenna element 301 . Although the interval ...

no. 3 approach

[0073] In the first embodiment and the second embodiment, an example of the configuration of the transmission antenna device was shown. In this embodiment, an example of subframe configurations in the MIMO mode and the BF mode will be used to describe signals transmitted from the MIMO array and the BF array. Figure 5is a diagram showing an example of a downlink subframe configuration. The subframe includes: data channel (PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) or PMCH (Physical Multimedia broadcast multicast service Channel, physical multimedia broadcast multicast service channel)), control channel (PCFICH (Physical Control Format Indication Channel, Physical Control Format Indicator Channel), PHICH (Physical Hybrid automatic repeat request Indicator Channel, Physical Hybrid Automatic Repeat Request Indicator Channel), PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel)), and synchronization signals and reference sig...

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Abstract

Two types of array antennas with different downtilt angles are used separately inside and outside of a cell, in consideration of the transmission mode. The base station device communicates wirelessly with a mobile station device, and is equipped with a first array antenna (201) that has the downtilt angle ?1 and performs MIMO (Multiple Input Multiple Output) transmission, and a second array antenna (202) that has the downtilt angle ?2, which is smaller than that of the first array antenna (201), and performs beamforming.

Description

technical field [0001] The present invention relates to an antenna device and a base station device having a plurality of types of array antennas. Background technique [0002] Conventionally, in a mobile phone system, a technique has been proposed in which a base station apparatus uses two types of array antennas having different downtilt angles on the outside and inside of a cell, respectively. That is, in this technique, the base station apparatus separately controls both a beam that transmits with higher power to the outside of the cell and a beam that transmits with weaker power to the inside of the cell. [0003] Non-Patent Document 1: 3GPP, TSG-RAN1, #53bis, R1-082520, "An Overview of Opportunistic Space Time Multiple Access", Nortel, June 30-July 4, 2008. [0004] However, in Non-Patent Document 1, no consideration is given to the transmission mode. That is, when two array antennas having different downtilt angles are respectively used on the outside and inside of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/08H01Q3/34H01Q25/00H04B7/04H04B7/10H04J99/00H04W16/28
CPCH04B7/0689H01Q1/246H01Q3/30H01Q21/28H04B7/0413H04B7/0617
Inventor 野上智造
Owner SHARP KK
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