KR20010093573A - System for distributing optical signal of base transceiver station - Google Patents

System for distributing optical signal of base transceiver station Download PDF

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Publication number
KR20010093573A
KR20010093573A KR1020000016240A KR20000016240A KR20010093573A KR 20010093573 A KR20010093573 A KR 20010093573A KR 1020000016240 A KR1020000016240 A KR 1020000016240A KR 20000016240 A KR20000016240 A KR 20000016240A KR 20010093573 A KR20010093573 A KR 20010093573A
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South Korea
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transceiver
base station
optical
divider
transceivers
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KR1020000016240A
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Korean (ko)
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조영창
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조영창
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Publication of KR20010093573A publication Critical patent/KR20010093573A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15557—Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: An optical splitting system for a wireless BTS(Base Transceiver Subsystem) is provided to decrease splitting loss and efficiently use an optical line by linking a plurality of transceivers in a repeater using one optical cable and highly splitting an optical signal level based on line loss in a transceiver located in farthest distance. CONSTITUTION: A wireless BTS(110) links the n+1 number of transceivers(130) using the n number of optical splitters(120) by one optical line(112) within 5-20km ranges. In case that 3 transceivers(130) is linked to the wireless BTS(110), the wireless BTS(110) and first and second splitters(120A,120B) are connected using one optical line(112). The first transceiver(130A) is connected to the first splitter(120A), and the second transceiver(130B) and the third transceiver(130C) are connected to the second splitter(120B). The wireless BTS(110) highly splits an optical signal level to the transceiver(130C) located in the farthest distance among a plurality of transceivers(130A,130B,130C).

Description

무선기지국의 광분배시스템{System for distributing optical signal of base transceiver station}System for distributing optical signal of base transceiver station

본 발명은 무선기지국의 광분배 시스템에 관한 것으로, 특히 하나의 광케이블을 이용하여 중계기에서 다수의 송수신기를 링크(link)시키고 가장 먼거리에 있는 송수신기에 선로손실을 감안하여 광신호레벨을 높게 분배함으로서 분배손실을 현저하게 감소시키고, 광선로를 효율적으로 이용하기 위한 무선기지국의 광분배 시스템에 관한 것이다.The present invention relates to an optical distribution system of a wireless base station, in particular, by linking a plurality of transceivers in a repeater using one optical cable and distributing the optical signal levels in a high distance in consideration of the line loss to the farthest transceiver. The present invention relates to an optical distribution system of a radio base station for significantly reducing losses and efficiently using optical paths.

일반적으로, 이동 통신 시스템은 기지국(base transceiver station), 제어국(base station controller), 교환국(mobile switching center), 이동국(mobile station)등으로 구성되는 데, 기지국과 이동국간은 일정한 주파수 대역으로 통신하게 된다. 이동통신 시스템에서 각 기지국은 일정한 통화반경을 가지게 되는 데, 각 지지국의 통화반경을 경계면에서 서로 조금씩 겹치도록 적절하게 배치하여 통화가능한 지역을 넓히게 된다.In general, a mobile communication system includes a base transceiver station, a base station controller, a mobile switching center, a mobile station, and the like, and the base station and the mobile station communicate in a constant frequency band. Done. In the mobile communication system, each base station has a constant call radius, and the call radius of each supporting station is appropriately arranged so as to overlap each other at the boundary to expand the callable area.

그러나, 기지국을 적절하게 배치하여 통화가능한 지역을 확장시킨다고 하더라도 건물등과 같은 장애물이나 지형등의 영향에 의하여 기지국에서 통화가 되지 않는 통화 음영 지역(blanket area)이 발생한다. 이러한 통화 음영 지역에서는 이동 통신 가입자가 양호한 품질의 통화서비스를 받을 수 없는 문제점이 발생하게 된다.However, even when the base station is properly arranged to expand the callable area, a blanket area where a call is not made by the base station occurs due to an obstacle such as a building or a terrain. In such shaded areas, mobile communication subscribers cannot receive good quality call service.

이러한 통화 음영 지역을 해소하기 위하여 음영지역내에 기지국을 설치하는 방안과 광중계기를 이용하는 방안이 대두되었다. 음영지역내에 기지국을 신설하는 방안은 가장 효과적이라 할 수 있으나, 기지국 설치에 막대한 비용이 소요된다는 문제점이 있으며, 광중계기(무선기지국)을 이용하는 방안은 음영지역내에 다수의 송수신기와 광케이블을 독립적으로 연결시킴으로서 광선로 확보가 어려운 문제점이 있었다. 즉, 광중계기(무선 기지국)에서 다수의 송수신기를 링크(link)시키는 경우에는 광신호가 분배되는 송수신기 1개당 광신호는 3dB, RF신호인 경우 6dB의 손실과 km당 0.3dB의 선로손실이 발생하기 때문에, 손실을 감안하면 결국 광중계기에서 각각의 송수신기에 독립적으로 광케이블을 연결할 수밖에 없어서 광선로확보가 어렵게 되는 것이다.In order to solve such a call shadow area, a method of installing a base station in a shadow area and using an optical repeater have emerged. The new base station in the shaded area is the most effective, but there is a problem that the installation of the base station is enormous cost, and the method using the optical repeater (wireless base station) independently connects multiple transceivers and optical cables in the shaded area There was a problem that it is difficult to secure the optical path. That is, in case of linking a plurality of transceivers in an optical repeater (wireless base station), 3dB of optical signal per transceiver to which optical signals are distributed and 6dB of loss in case of RF signal and 0.3dB of line loss per km are generated. Therefore, in view of the loss, it is difficult to secure the optical path since the optical repeater has no choice but to connect an optical cable to each transceiver independently.

본 발명은 상기의 문제점을 해소하기 위하여 발명된 것으로, 본 발명의 목적은 무선 기지국에서 근거리 즉, 5-20㎞에 무선기지국과 링크된 송수신기를 거리에 따라 가장 먼거리에 있는 송수신기에 선로손실을 감안하여 광신호레벨을 높게 분배함으로서 무선기지국과 송수신기간의 링크에 하나의 광케이블을 이용함으로서 광케이블의 이용에 효율성을 증대하고 분배손실을 현저하게 감소시키기 위한 무선기지국의 광분배 시스템을 제공하는 데 있다.The present invention has been invented to solve the above problems, and an object of the present invention is to consider a line loss at a transceiver that is located at the farthest distance according to a distance between a wireless base station and a transceiver linked at a short distance, that is, 5-20 km from a wireless base station. By using a single optical cable for the link between the base station and the transmission / reception period by distributing the optical signal level higher, the optical distribution system of the wireless base station can be provided to increase the efficiency of using the optical cable and to significantly reduce the distribution loss.

도 1은 본 발명에 따른 무선기지국의 광분배 시스템의 일 실시예를 보여주기 위한 시스템도이다.1 is a system diagram showing an embodiment of an optical distribution system of a wireless base station according to the present invention.

도 2는 본 발명에 따른 무선기지국의 광분배 시스템의 다른 실시예를 보여주기 위한 시스템도이다.2 is a system diagram showing another embodiment of an optical distribution system of a wireless base station according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

110 : 무선 기지국 112 : 통신선로110: wireless base station 112: communication line

120 : 분배기 130 : 송수신기120: divider 130: transceiver

이와 같은 목적을 달성하기 위한 본 발명은The present invention for achieving the above object

무선기지국에 연결되어 무선기지국을 중심으로 가까운 곳의 송수신기 및 먼 곳의 송수신기의 입출력레벨이 전송거리에 따른 손실과 분배에 따른 손실을 감안하여 같도록 조절하기 위하여 총신호 손실중 감쇄가 많은 입출구를 거리가 가까운 송수신기측으로 분배하고, 감쇄가 적은 입출구를 거리가 먼 다른 분배기과 연결된 광선로로 분배하도록 동작되는 N개의 분배기; 그리고,In order to adjust the I / O levels of the transceivers in the near and distant transceivers centered on the radio base station to be the same in consideration of the loss due to the transmission distance and the loss due to the distribution, the entrances and exits with a large attenuation during total signal loss are adjusted. N distributors operable to distribute to the transceiver side at short distances, and to distribute the entrances and exits with less attenuation to optical paths connected to other distributors at a distance from each other; And,

N개의 분배기에 접속된 N+1개의 송수신기를 포함한다.And N + 1 transceivers connected to the N distributors.

이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부된 도 1은 본 발명에 따른 무선기지국의 광분배 시스템의 일 실시예를 보여주기 위한 시스템도이고, 도 2는 본 발명에 따른 무선기지국의 광분배 시스템의 다른 실시예를 보여주기 위한 시스템도이다.1 is a system diagram showing an embodiment of an optical distribution system of a wireless base station according to the present invention, and FIG. 2 is a system diagram showing another embodiment of an optical distribution system of a wireless base station according to the present invention. to be.

본 발명에 따른 무선기지국의 광분배 시스템은, 광신호를 중계하기 위한 무선기지국(110)에서 5-20㎞의 범위내에서 하나의 광선로(112)를 이용하여 n개의 광분배기(120)을 이용하여 n+1개의 송수신기(130)를 링크(link)시킨다. 즉, 도 1에서 보는 바와 같이 무선기지국에 3개의 송수신기(130)가 링크된 경우라면 무선기지국(110)과 제 1 분배기(120A) 및 제 2 분배기(120B)가 하나의 광선로(112)를 이용하여 연결되고, 제 1 분배기(120A)에는 제 1 송수신기(130A)가 접속되고, 제 2 분배기(120B)에는 제 2 송수신기(130B) 및 제 3 송수신기(130C)가 접속된다.In the optical distribution system of the wireless base station according to the present invention, in the wireless base station 110 for relaying an optical signal, the n optical splitters 120 are connected to each other using one optical line 112 within a range of 5-20 km. N + 1 transceivers 130 by using a link. That is, as shown in FIG. 1, when three transceivers 130 are linked to the radio base station, the radio base station 110, the first distributor 120A, and the second distributor 120B connect one optical path 112. The first transceiver 130A is connected to the first distributor 120A, and the second transceiver 130B and the third transceiver 130C are connected to the second distributor 120B.

본 발명에 따른 무선기지국의 광분배시스템은 무선 기지국(110)에서 분배기(120A, 120B)들을 통하여 링크된 다수의 송수신기(130A, 130B, 130C)중 가장 먼거리에 있는 송수신기(130C)에 광신호레벨을 높게 분배하게 된다.The optical distribution system of the radio base station according to the present invention has an optical signal level at a transceiver 130C at the farthest distance among a plurality of transceivers 130A, 130B, and 130C linked through the distributors 120A and 120B in the radio base station 110. Will be distributed high.

즉, 도 1에서 보는 바와 같이, 무선기지국(110)과 가장 가까운 거리의 제 1 분배기(120A)에서는 신호손실이 총 6dB가 발생하게 되는 데, 이는 광신호가 분배되는 송수신기 1개당 광신호는 3dB의 손실이 발생하기 때문이다. 따라서, 제 1 분배기(120A)에서는 제 1 송수신기(130A) 및 제 2 분배기(120B)측으로 2경로로 광신호가 분배되기 때문에 총 6dB의 신호손실이 발생한다. 무선기지국(110)과 가장 가까운 거리의 제 1 분배기(120A)에서는 총 6dB의 신호손실중 제 1 송수신기(130A)측으로 5.3dB ∼5.9dB를 분배하고 제 2 분배기(120B)측으로 0.1dB ∼0.7dB를 분배하게 된다.That is, as shown in Figure 1, in the first splitter 120A of the closest distance to the wireless base station 110, a total signal loss of 6dB is generated, which means that the optical signal per transceiver to which the optical signal is distributed is 3dB This is because loss occurs. Accordingly, since the optical signal is distributed in two paths to the first transceiver 130A and the second divider 120B, the first divider 120A generates a total signal loss of 6 dB. The first divider 120A closest to the radio base station 110 distributes 5.3 dB to 5.9 dB to the first transceiver 130A and 6 dB to 0.7 dB to the second divider 120B. Will be distributed.

또한, 제 2 분배기(120B)에서는 총 6dB의 신호손실중 제 2 송수신기(130A)측으로 4.5dB ∼5.5dB를 분배하고 제 3 송수신기(130C)측으로 0.5dB ∼1.5dB를 분배하게 된다. 그러므로, 무선기지국(110)을 중심으로 거리에 따라 제 1 분배기(120A)에서는 감쇄가 많은 입출구를 제 1 송수신기(130A)측으로 분배하고, 감쇄가 적은 입출구를 제 2 분배기(120B)측의 광선로로 분배하며, 광선로를 통과한 제 2 분배기(120B)도 마찬가지로 거리비에 따라 감쇄가 많은 입출구를 제 2 송수신기(130B)측으로 분배하고, 감쇄가 적은 입출구를 제 3 송수신기(130C)측의 광선로로 분배한다.In addition, the second divider 120B distributes 4.5 dB to 5.5 dB to the second transceiver 130A side and 0.5 dB to 1.5 dB to the third transceiver 130C side of the total 6 dB signal loss. Therefore, according to the distance from the radio base station 110, the first distributor 120A distributes the entrance and exit with a lot of attenuation to the first transceiver 130A, and the entrance and exit with less attenuation is routed to the optical path on the side of the second distributor 120B. Similarly, the second distributor 120B having passed through the optical path distributes the entrances and exits with much attenuation to the second transceiver 130B side according to the distance ratio, and distributes the entrances and exits with less attenuation to the optical path on the side of the third transceiver 130C. do.

이와 같이 구성되면 제 1 송수신기(130A)측의 감쇄는 5.3dB ∼5.9dB로 나타나지만 광선로(112)에 따른 손실이 없는 점을 감안 하면 신뢰할 수 있는 성능을 나타낼 수 있으며, 제 2 송수신기(130B)측의 감쇄는 4.5dB ∼5.5dB와 km당 0.3dB의 선로손실이 나타나지만 제 3 송수신기(130C)측의 선로손실보다도 적은 점을 감안 하면 신뢰할 수 있는 성능을 나타낼 수 있다. 또한, 제 3 송수신기(130C)측은 거리에 따라 선로손실에 따른 0.6dB ∼2.2dB를 나타내고, 거리가 가장 먼 경우에는 0,6dB의 손실을 부담하면 된다.In this configuration, the attenuation at the side of the first transceiver 130A is 5.3dB to 5.9dB, but the loss is not caused by the optical path 112, and thus the reliable performance can be obtained. The side attenuation shows a line loss of 4.5 dB to 5.5 dB and 0.3 dB per km, but can be reliably considered in view of less than the line loss of the third transceiver 130C. Further, the third transceiver 130C side exhibits 0.6 dB to 2.2 dB depending on the line loss depending on the distance. If the distance is the longest, the third transceiver 130C may bear a loss of 0,6 dB.

본 발명에 따른 무선기지국의 광분배시스템은 도 2에서 보는 바와 같이 도 1의 경우 보다 1개의 분배기(120d)가 더 링크된 경우로 무선기지국(110)을 중심으로 3개의 분배기(120A-120D)가 하나의 광선로(112)를 통하여 연결되고 3개의 분배기(120A-120D)에는 각각 4개의 송수신기(130A-130D)가 각각 접속된다.As shown in FIG. 2, the optical distribution system of the wireless base station according to the present invention has three splitters 120A-120D centered on the wireless base station 110 as one splitter 120d is linked more than in FIG. 1. Is connected via one optical beam 112, and four transceivers 130A-130D are connected to the three distributors 120A- 120D, respectively.

도 2의 경우에서는 무선기지국(110)과 가장 가까운 거리의 제 1 분배기(120A)에서는 총 6dB의 신호손실중 제 1 송수신기(130A)측으로 5.5dB∼5.9dB를 분배하고 제 2 분배기(120B)측으로 0.1dB ∼0.5dB를 분배하고, 제 2 분배기(120B)에서는 총 6dB의 신호손실중 제 2 송수신기(130B)측으로 5.2dB ∼5.6dB를 분배하고 제 3 분배기(120C)측으로 0.4dB ∼0.8dB를 분배하며, 제 3 분배기(120C)에서는 총 6dB의 신호손실중 제 3 송수신기(130C)측으로 4.7dB ∼5.3dB를 분배하고 제 4 송수신기(130D)측으로 0.7dB ∼1.3dB를 분배하게 된다.In the case of FIG. 2, the first divider 120A closest to the radio base station 110 distributes 5.5 dB to 5.9 dB to the first transceiver 130A side and out to the second divider 120B side of the total 6 dB signal loss. 0.1 dB to 0.5 dB, and the second divider 120B distributes 5.2 dB to 5.6 dB to the second transceiver 130B side and a total of 0.4 dB to 0.8 dB to the third divider 120C. The third divider 120C distributes 4.7 dB to 5.3 dB of the total signal loss of 6 dB to the third transceiver 130C and 0.7 dB to 1.3 dB of the fourth transceiver 130D.

본 발명에 따른 무선기지국의 광분배시스템은 장거리 전송의 경우에도 거리상 제일 먼거리의 송수신기에 선로손실을 감안하여 손실이 적은 배분을 하여 무선기지국을 중심으로 가까운 곳과 먼곳의 입출력레벨이 같도록 조절함으로서 광케이블의 이용에 효율성을 극대화 할 수 있다.The optical distribution system of the wireless base station according to the present invention, even in the case of long-distance transmission, distributes less loss in consideration of the line loss to the transceiver of the farthest distance in the distance so that the input and output levels of the near and far centers are the same. Efficiency can be maximized in the use of optical cable.

상술한 바와 같이, 본 발명은 무선 기지국에서 5-20㎞의 범위내에 무선 기지국과 링크된 송수신기를 거리에 따라 가장 먼거리에 있는 송수신기에 광신호레벨을 높게 분배함으로서 무선기지국과 송수신기간의 링크에 하나의 광케이블을 이용함으로서 광케이블의 이용에 효율성을 증대하고 분배손실을 현저하게 감소시키는 효과가 있다.As described above, the present invention distributes a high optical signal level to a transceiver farthest from the radio base station within a range of 5-20 km from the radio base station according to the distance, so that the radio base station and the transmission / reception period are linked to each other. By using the optical cable, the efficiency of the optical cable is increased and the distribution loss is remarkably reduced.

이상에서 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하였으나, 본 발명은 이에 한정되는 것이 아니며 본 발명의 기술적 사상의 범위내에서 당업자에 의해 그 개량이나 변형이 가능하다.Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited thereto and may be improved or modified by those skilled in the art within the scope of the technical idea of the present invention.

Claims (3)

무선기지국(110)에 연결되어 상기 무선기지국(110)을 중심으로 가까운 곳의 송수신기 및 먼 곳의 송수신기의 입출력레벨이 전송거리에 따른 손실과 분배에 따른 손실을 감안하여 같도록 조절하기 위하여 총신호 손실중 감쇄가 많은 입출구를 거리가 가까운 송수신기(130)측으로 분배하고, 감쇄가 적은 입출구를 거리가 먼 다른 분배기(120)과 연결된 광선로(112)로 분배하도록 동작되는 N개의 분배기; 그리고,Connected to the wireless base station 110, the total signal to adjust the input and output levels of the transceivers in the near and the remote in the center around the wireless base station 110 in consideration of the loss according to the transmission distance and the loss due to the distribution N distributors operable to distribute the inlet and outlet with a large amount of attenuation during loss to the transceiver 130 at a short distance, and to distribute the inlet and outlet with a small attenuation to the optical path 112 connected to another distributor 120 at a long distance; And, 상기 N개의 분배기에 각각 접속된 N+1개의 송수신기를 포함하는 무선기지국의 광분배시스템.And N + 1 transceivers each connected to the N distributors. 제 1 항에 있어서, 상기 무선기지국의 광분배시스템이 2개의 분배기 및 상기 2개의 분배기에 접속된 3개의 송수신기를 구비하는 경우에는, 상기 무선기지국(110)과 가장 가까운 거리의 제 1 분배기(120A)는 거리에 따라 6dB의 신호손실중 제 1 송수신기(130A)측으로 5.3dB ∼5.9dB를 분배하고, 제 2 분배기(120B)측으로 0.1dB ∼0.7dB를 분배하며, 상기 제 2 분배기(120B)는 거리에 따라 6dB의 신호손실중 제 2 송수신기(130A)측으로 4.5dB ∼5.5dB를 분배하고 제 3 송수신기(130C)측으로 0.5dB ∼1.5dB를 분배하는 것을 특징으로 하는 무선기지국의 광분배시스템.2. The first divider 120A of claim 1, wherein the optical distribution system of the base station includes two splitters and three transceivers connected to the two splitters. ) Distributes 5.3 dB to 5.9 dB to the first transceiver 130A side, 0.1 dB to 0.7 dB to the second divider 120B side, and the second divider 120B An optical distribution system of a wireless base station, characterized by distributing 4.5 dB to 5.5 dB to the second transceiver (130A) side and 0.5 dB to 1.5 dB to the third transceiver (130C) side of the 6 dB signal loss depending on the distance. 제 1 항에 있어서, 상기 무선기지국의 광분배시스템이 3개의 분배기 및 상기 3개의 분배기에 접속된 4개의 송수신기를 구비하는 경우에 상기 무선기지국(110)과The wireless base station 110 according to claim 1, wherein the optical distribution system of the wireless base station includes three splitters and four transceivers connected to the three splitters. 가장 가까운 거리의 제 1 분배기(120A)는 거리에 따라 6dB의 신호손실중 제 1 송수신기(130A)측으로 5.5dB ∼5.9dB를 분배하고 제 2 분배기(120B)측으로 0.1dB ∼0.5dB를 분배하고, 제 2 분배기(120B)는 6dB의 신호손실중 제 2 송수신기(130B)측으로 5.2dB ∼5.6dB를 분배하고, 제 3 분배기(120C)로 0.4dB ∼0.8dB를 분배하며, 제 3 분배기(120C)는 6dB의 신호손실중 제 3 송수신기(130C)측으로 4.7dB ∼5.3dB를 분배하고 제 4 송수신기(130D)측으로 0.7dB ∼1.3dB를 분배하는 것을 특징으로 하는 무선기지국의 광분배시스템.The first divider 120A of the closest distance distributes 5.5 dB to 5.9 dB to the first transceiver 130A side and 0.1 dB to 0.5 dB to the second divider 120B side of the 6 dB signal loss according to the distance. The second divider 120B distributes 5.2 dB to 5.6 dB to the second transceiver 130B side of the 6 dB signal loss, distributes 0.4 dB to 0.8 dB to the third divider 120C, and the third divider 120C. The optical distribution system of the wireless base station is characterized by distributing 4.7dB ~ 5.3dB to the third transceiver (130C) side and 0.7dB ~ 1.3dB to the fourth transceiver (130D) side of the 6dB signal loss.
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Publication number Priority date Publication date Assignee Title
KR100442132B1 (en) * 2001-11-27 2004-07-30 에스케이 텔레콤주식회사 Optical Distribution System for Tunnel in mobile communication network
KR100464822B1 (en) * 2002-01-21 2005-01-06 (주)하이게인안테나 Unified repeater for mobile communication service
KR100584383B1 (en) * 2004-01-20 2006-05-26 삼성전자주식회사 OPTICAL LINE TERMINALOLT FOR MANAGING LINK STATUS OF OPTOCAL NETWORK UNITSONUs AND GIGABIT ETHERNET PASSIVE OPTICAL NETWORKGE-PON APPLING THE SAME
KR100809433B1 (en) 2005-12-08 2008-03-07 한국전자통신연구원 System for base station, base station controller and base station receiver

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JPH07235898A (en) * 1994-01-31 1995-09-05 R C S:Kk Base station distribution equipment
KR19990066603A (en) * 1998-01-31 1999-08-16 정장호 Optical relay system for extended service coverage
KR20000073652A (en) * 1999-05-13 2000-12-05 이돈신 Optical relay system in divergent join type

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07235898A (en) * 1994-01-31 1995-09-05 R C S:Kk Base station distribution equipment
KR19990066603A (en) * 1998-01-31 1999-08-16 정장호 Optical relay system for extended service coverage
KR20000073652A (en) * 1999-05-13 2000-12-05 이돈신 Optical relay system in divergent join type

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442132B1 (en) * 2001-11-27 2004-07-30 에스케이 텔레콤주식회사 Optical Distribution System for Tunnel in mobile communication network
KR100464822B1 (en) * 2002-01-21 2005-01-06 (주)하이게인안테나 Unified repeater for mobile communication service
KR100584383B1 (en) * 2004-01-20 2006-05-26 삼성전자주식회사 OPTICAL LINE TERMINALOLT FOR MANAGING LINK STATUS OF OPTOCAL NETWORK UNITSONUs AND GIGABIT ETHERNET PASSIVE OPTICAL NETWORKGE-PON APPLING THE SAME
KR100809433B1 (en) 2005-12-08 2008-03-07 한국전자통신연구원 System for base station, base station controller and base station receiver

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