KR20060125209A - Junction apparatus of wibro - Google Patents

Abstract

A WiBro repeater is provided to substitute a low-priced switch having low isolation for a circulator and high-priced switch having high isolation, thereby reducing costs of the WiBro repeater. A WiBro repeater comprises the followings: the first switch(131) which is installed in a BS(Base Station)-direction antenna and transmits a signal, inputted through the first filter(111) from a BS(a service providing system), to an RF(Radio Frequency) module(580a); the second switch(132) which is installed in a subscriber-direction antenna and transmits a signal, inputted through the second filter(112) from a subscriber(a WiBro terminal), to the RF module(580a); and the third switch(133) for transmitting signal, transmitted through a high power amplifier from the RF module(580a) by the first and second switches(131,132), to the switch(132 or 132) of a side opposite to input.

Description

Portable Internet Relay Device {Junction Apparatus Of WiBro}

Figure 1a is a configuration diagram of an embodiment of a general portable Internet service providing system.

1B is a configuration diagram of an embodiment of a conventional portable Internet relay device.

Figure 1c is another embodiment configuration of a conventional portable Internet relay device.

2A is a block diagram of an embodiment of a portable Internet relay apparatus according to the first embodiment of the present invention.

2B is an exemplary view showing a relay state in the forward direction of the portable Internet relay apparatus according to the first embodiment of the present invention.

Fig. 2C is an exemplary view showing a relay state in the reverse direction of the portable Internet relay apparatus according to the first embodiment of the present invention.

Figure 2d is an example of combining three wireless modules of the portable Internet relay apparatus according to the first embodiment of the present invention into one wireless module.

3 is a block diagram of a portable Internet relay device according to a second embodiment of the present invention.

4A is a block diagram of a portable Internet relay device according to a third embodiment of the present invention.

4B is an exemplary view showing a relay state in the forward direction of the portable Internet relay apparatus according to the third embodiment of the present invention.

4C is an exemplary view showing a relay state in the reverse direction of the portable Internet relay apparatus according to the third embodiment of the present invention.

Figure 4d is an example of combining three wireless modules of a portable Internet relay apparatus according to a third embodiment of the present invention into one wireless module.

5 is a block diagram of a portable Internet relay apparatus according to a fourth embodiment of the present invention.

The present invention relates to a portable internet relay device.

The WiBro service is a communication service that enables users to access necessary information and multimedia contents at high speed while stopping and moving indoors and outdoors by using various portable terminals such as laptops, PDAs, handsets, and smartphones. Unlike high-speed internet service that can be used in a fixed place where Internet line is installed such as home, school, company, etc., it refers to a communication service that allows the Internet to be used outdoors in urban streets and parks.

At this time, the mobile Internet service is a problem of the currently provided wireless Internet service, that is, the mobile phone-based wireless Internet is showing a limit to the market spread at a low rate and high rates, the wireless LAN is narrow coverage and ISM (Industrial, Scientific and Medical) It was developed to solve the problem of difficulty in spreading service due to the difficulty of guaranteeing Quality of Service (QoS) due to the characteristics of the band.

Meanwhile, the portable Internet service providing system for providing the portable Internet service includes a service providing system 100 for providing various Internet contents through wireless, and various wirelessly through the service providing system as shown in FIG. 1A. It comprises a portable Internet terminal 300 for receiving Internet content and a portable Internet repeater 200 for relaying communication between the service providing system and the portable Internet terminal.

In the following, the configuration of the portable Internet repeater 2 currently being used will be briefly described with reference to FIGS. 1B and 1C.

1B is a configuration diagram of an embodiment of a conventional portable Internet relay device.

That is, the conventional portable Internet relay device as shown in FIG. 1B uses circulators 21 and 22 and a switch 81 to simplify the structure, and the low noise amplifier 88, Structure composed of RF module 80 and high output amplifier 40 composed of mixers 82 and 84, SAW filter 83, attenuator 85, preamp 86 and filter 87 I'm using.

At this time, the conventional portable Internet relay device as shown in Figure 1b has the following problems.

First, when the isolation of the switch 30 is insufficient, there is a problem that the output of the high power amplifier 40 is radiated to the outside through the input side antenna.

Second, when the signal radiated through the output side antenna is reduced and then reflected by the standing wave ratio of the antenna and input to the low noise amplifier 88, the input signal after reflection is not sufficient when the isolation of the switch 81 is not large enough. The absolute size of the signal is larger than the original input signal, which causes internal feedback oscillation. This oscillation causes saturation and damage of the wireless module 80 and the high power amplifier 40. There is a problem that makes it impossible.

Third, there is a problem in that the cost of the relay device is increased as a whole because the cost is high when using the switches 30 and 81 having high isolation to solve the above problem.

On the other hand, an example of another conventional portable Internet relay device for solving the problems of the conventional portable Internet relay device as described above is shown in Figure 1c.

Figure 1c is a block diagram of another embodiment of a conventional portable Internet relay device.

That is, as shown in FIG. 1C, another conventional portable Internet relay device includes a filter 11, a circulator 21, a switch 31, and a low noise amplifier 88a in a forward direction in order to ensure isolation. Wireless module 80a, high output amplifier 40a, switch 32, circulator, consisting of Mixer (82, 84), SAW Filter (83), attenuator (85), preamp (86) and filter (filter) (87) Comprising a filter 22, a filter 12, the filter 12, the circulator 22, the switch 33 and the low noise amplifier 88b, Mixer (82, 84), SAW Filter (83) in the reverse direction And a wireless module 80b composed of an attenuator 85, a preamp 86, and a filter 87, a high output amplifier 40b, a switch 34, a circulator 21, and a filter 11. Two separate blocks are used.

At this time, the conventional portable Internet relay device as shown in Figure 1c, the problem of the radiation of the output signal to the input, and the internal feedback oscillation, which is a problem of the portable Internet relay device shown in Figure 1b can solve, Increasing the size and cost of the enclosure by increasing the number of modules (Modules), and the installation has a problem that does not match the surrounding environment occurs.

An object of the present invention for solving the above problems is to use a switch having a low cost low isolation that can replace a switch having a high cost of high isolation and the wireless module forward and It is to provide a portable Internet relay device which can be shared at the time of reverse direction.

Another object of the present invention is to increase the isolation between transmission and reception while allowing the wireless module to be shared in the forward and reverse directions, thereby ensuring an internal isolation to eliminate internal feedback oscillation, The lack of isolation at the output side switches provides a portable Internet relay device that minimizes radiation to the input antenna.

The present invention for achieving the above object is, in the portable Internet relay apparatus having a wireless module, provided on the side of the base station direction antenna, the signal input through the first filter 111 from the base station (service providing system 1) side First switch (131) for transmitting to the wireless module; A second switch 132 provided at a subscriber direction antenna side for transmitting a signal input from the subscriber (portable Internet terminal 3) through the second filter 112 to the wireless module; And a third switch 133 for transmitting a signal transmitted from the wireless module through the high power amplifier by the first switch or the second switch to a switch 131 or 132 opposite to an input. The two low-noise amplifiers 588a and 588b, the switch 581, the mixers 582 and 584, the SAW filter 583, the attenuator 585, the preamp 586, and the filter, which can be independently supplied with power, Filter 587).

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A is a block diagram of an embodiment of a portable Internet relay apparatus according to the first embodiment of the present invention. FIG. 2B is an exemplary view showing a relay state in the forward direction of the portable Internet relay device according to the first embodiment of the present invention, and FIG. 2C is a reverse view of the portable Internet relay device according to the first embodiment of the present invention. An example showing the relay state of. FIG. 2D is an exemplary view in which three wireless modules of the portable Internet relay apparatus according to the first embodiment of the present invention are combined into one wireless module, and three wireless devices are connected from one wireless module using a divider and a combiner. The state of coupling to the module is shown.

That is, the portable Internet relay device of the time division duplex system according to the first embodiment of the present invention as shown in FIG. 2A is an improvement of the conventional portable internet relay device shown in FIG. By using three switches (131, 132, 133) and two independently independent low noise amplifiers (588a, 588b) to improve the isolation between the input and output, Switch 581, Mixer 582, 584, SAW Filter 583, Attenuator 585, Preamp 586, except for the two low noise amplifiers 588a, 588b, inside the RF Module 580a. ), A filter (filter) 587 and a high output amplifier 140 are used to enable forward and reverse implementation.

At this time, the first switch 131 is provided on the antenna side of the base station to transmit a signal input through the first filter 111 from the base station (service providing system 1) to the wireless module 580a. Perform.

In addition, the second switch 132 is provided on the subscriber side antenna side to transmit a signal input through the second filter 112 from the subscriber (mobile Internet terminal 3) side to the wireless module 580a. Perform.

In addition, the third switch 133 transmits a signal transmitted from the wireless module 580a by the first switch or the second switch to a switch 131 or 132 opposite to an input.

In addition, the first switch 131 and the second switch 132 is insufficient isolation between the shuffler (21, 22) and the switch (30, 81) in the conventional portable Internet relay device shown in Figure 1b. In order to amplify a signal transmitted through the first switch 131 and the second switch 132, the portable Internet relay device according to the first embodiment of the present invention is used to supplement the wireless module. Two low noise amplifiers 588a and 588b are used inside 580a.

The reason for using two low noise amplifiers is as follows.

First, in the case of FIG. 1B forward using one low noise amplifier 88, the output generated from the high output amplifier 40 is radiated to the subscriber direction antenna through the switch 30, the circulator 22, and the filter 12. At this time, when the signal radiated through the antenna on the output side is reduced and then reflected by the standing wave ratio of the antenna and input to the low noise amplifier 88, if the isolation of the switch 81 is not large enough, the input signal after reflection is reflected. The absolute size of the signal is larger than the size of the original input signal, which causes internal feedback oscillation. This oscillation causes saturation and damage of the wireless module 80 and the high power amplifier 40. There is a problem that makes it impossible.

On the contrary, in the forward direction as shown in FIG. 2B using two low noise amplifiers 588a and 588b, one low noise amplifier 588a is operated by applying power and another low noise amplifier 588b is operated by not applying power. In the reverse direction as shown in FIG. 2C, one low noise amplifier 558a does not apply power and stops operation, and another low noise amplifier 558b operates by applying power to ensure isolation to return internally. The effect is to prevent sexual rashes.

On the other hand, the configuration and function of the wireless module 580a and the high power amplifier 140 including the low noise amplifiers 588a and 588b are the same as those of the conventional wireless module 80 shown in FIGS. 1B and 1C. Detailed description thereof is omitted.

At this time, the operation state of each component in the forward and reverse directions of the portable Internet relay apparatus according to the first embodiment of the present invention having the above configuration is as shown in Figs. 2b and 2c, respectively, In the portable Internet relay device according to the first embodiment, the signal flows in the forward and reverse directions are completely separated, thereby preventing internal feedback oscillation and radiation in an undesired direction.

On the other hand, in the conventional portable Internet relay apparatus shown in FIG. 1B as described above, the isolation of each of the switches 30 and 81 must be at least greater than the overall gain so that the output of the high output amplifier 40 is switched 30. After the reduction of the isolation (Isolation) of the problem is radiated to the outside through the antenna on the input side and the reflected signal is reflected in the state reduced by the standing wave ratio of the antenna filter 11, circulator 21, switch 81 Reverse internal feedback oscillation problems generated by passing through the low noise amplifier 88 and the saturation and damage of the wireless module 80 and the high output amplifier 40, and conversely, such problems as the forward direction in the reverse direction can be prevented. In the case of another conventional portable Internet relay device shown in FIG. 1C applied to solve this problem, an increase in the size of an enclosure and an increase in cost are caused by an increase in the number of internal modules. There will be a question of value.

That is, the portable Internet relay apparatus according to the first embodiment of the present invention illustrated in FIG. 2A is invented to solve all the problems of the conventional portable Internet relay apparatus illustrated in FIGS. 1B and 1C. When the output of the high output amplifier 140 decreases by the isolation of the switch 132 in the forward direction and is input to the low noise amplifier 588b in the RF module, the power of the low noise amplifier 558b is not applied. In this state, the internal feedback oscillation problem and the saturation and damage of the wireless module 80 and the high output amplifier 40 can be prevented from being operated, and the reverse direction also prevents the low noise amplifier 558a from being applied. In this case, the high power amplifier 140 outputs the isolation of each of the third switch 133 and the first switch 131 in the forward direction. size of the output signal when it is reduced by the tion) and radiated through the antenna of the base station direction is smaller than that of the input signal. ), The magnitude of the output signal when it is reduced by each isolation and radiated through the subscriber direction antenna becomes smaller than the magnitude of the input signal, and thirdly, the switch 581, the mixer 582, 584, Sharing of SAW Filter 583, Attenuator 585, Preamp 586, Filter 587 and High Power Amplifier 140 in the forward and reverse directions reduces the economics and the number of modules used. By reducing the size of the enclosure according to the nature has the feature that can design a friendly enclosure.

2D illustrates a state in which three wireless modules of the portable Internet relay apparatus according to the first embodiment of the present invention are combined by using the divider 589a and the combiner 589b as described above.

That is, the portable Internet relay apparatus needs to perform respective amplification on one or more signals. The present invention separates each signal using the divider 589a as shown in FIG. The signal amplified by the module of the combination using a combiner (589b) to transmit to the high output amplifier (340).

At this time, the configuration as described above may be applied to the configuration as shown in FIG.

3 is a block diagram of a portable Internet relay apparatus according to a second embodiment of the present invention.

In this case, the portable Internet relay apparatus according to the second embodiment of the present invention illustrated in FIG. 3 includes three switches 131, 132, and 133 of one portable internet relay apparatus according to the first embodiment illustrated in FIG. 2A. As shown in FIG. 3, when the switches 131, 132, and 133 are used as one switch module 230, the entire block of the portable Internet relay device may be configured more simply.

4A is a block diagram of a portable Internet relay apparatus according to the third embodiment of the present invention. FIG. 4B is an exemplary view showing a relay state in the forward direction of the portable Internet relay apparatus according to the third embodiment of the present invention, and FIG. 4C is a reverse view of the portable Internet relay apparatus according to the third embodiment of the present invention. An example showing the relay state of. FIG. 4D is an example of combining three wireless modules of a portable Internet relay apparatus according to a third embodiment of the present invention into one wireless module, and combining one or more wireless modules using a divider and a combiner. Indicates.

That is, the portable Internet relay device of the time division duplex system according to the third embodiment of the present invention as shown in FIG. 4A is an improvement of the conventional portable Internet relay device shown in FIG. Circulator 321, 322 and six switches 331, 332, 333, 334, 335, 581 (sometimes only four switches 333, 334, 335, 581) and two low noise amplifiers that can be powered independently The use of 588a and 588b improves the isolation between the input and the output, and at the same time, the switch 581 and the mixer except for the low noise amplifiers 588a and 588b inside the RF module 580c. (Mixer) (582, 584), SAW Filter (583), attenuator (585), Preamp (586), filter (filter) (587) and high output amplifier 140 are used to enable forward and reverse implementation have.

At this time, the first circulator 321 is provided on the base station direction antenna side to use the signal inputted through the first filter 311 from the base station (service providing system 1) side through the first switch 331 (in some cases). It may not)) to transmit to the wireless module (580c).

In addition, the second circulator 322 is provided on the subscriber direction antenna side and uses the second switch 332 (sometimes used) for the signal input from the subscriber (mobile Internet terminal 3) side through the second filter 312. It may not)) to transmit to the wireless module (580c).

In addition, the third switch 333 to the high output amplifier 340 through the wireless module 580c by the first switch 331 or the second switch 332 (may not be used in some cases both). After the amplified signal is transmitted to the circulator 321 or 322 opposite to the input through the fourth switch 334 or the fifth switch 335.

In addition, the portable Internet relay apparatus according to the third embodiment of the present invention may amplify a signal transmitted through the first switch 331 or the second switch 332 (or both may not be used at times). To this end, two low noise amplifiers 588a and 588b are used in the wireless module 580c.

Meanwhile, the configuration and function of the wireless module 580c and the high power amplifier 340 including the low noise amplifiers 588a and 588b are the same as those of the wireless modules 80a and 80b shown in FIG. Description is omitted.

In this case, the operation states of the components in the forward and reverse directions of the portable Internet relay apparatus according to the third embodiment of the present invention having the above configuration are as shown in FIGS. 4B and 4C, respectively. In the portable Internet relay apparatus according to the third embodiment, the signal flows in the forward and reverse directions are completely separated, thereby preventing saturation, damage and radiation in unwanted directions of each module due to internal feedback oscillation and oscillation. Will be.

That is, the portable Internet relay apparatus according to the third embodiment of the present invention illustrated in FIG. 4A is invented to solve the problems of the conventional portable Internet relay apparatus illustrated in FIG. 1C. Since the output of the amplifier 340 is reduced by the circulator 322 isolation and then input to the low noise amplifier 588b in the RF module, the power of the low noise amplifier 558b is not applied. Internal feedback oscillation and saturation and damage to the system can be prevented. In the reverse direction, since the power of the low-noise amplifier 558a is not applied, the same problem as in the forward direction can be prevented. 334 provides sufficient isolation, so that when the radiation or reverse direction of radio waves through the base station direction antenna of the output of the high power amplifier 340 due to lack of isolation Since switches 333 and 335 provide sufficient isolation, radiation of radio waves through subscriber-oriented antennas at the output of high power amplifier 340 can be reduced. Third, switches 581, mixers 582 and 584, SAW filters. 583, attenuator 585, preamp 586, filter (filter) 587 and high output amplifier 340 in the forward and reverse directions, thereby reducing the economics and number of modules used. By reducing the size of the enclosure, it has a feature to design a natural friendly enclosure.

On the other hand, Figure 4d is an example of combining one or more wireless modules using a divider and combiner of the portable Internet relay apparatus according to a third embodiment of the present invention as described above, the same as the description for Figure 2d The detailed description thereof will be omitted.

In addition, the configuration as shown in FIG. 4D may be applied to the configuration as shown in FIG. 5.

5 is a block diagram of a portable Internet relay apparatus according to a fourth embodiment of the present invention.

In this case, the portable Internet relay apparatus according to the fourth embodiment of the present invention shown in FIG. 5 makes three switches 333, 334, and 335 shown in FIG. 4A into one switch module 430, and a wireless module 580d. The RF module 580c is configured by using switches 331 and 332 (sometimes not used in some cases) in front of the low noise amplifiers 588a and 588b. The entire block of the device can be configured more simply.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

As described above, the present invention provides an excellent effect of reducing the cost of the portable Internet relay device by replacing the circulator with an expensive switch having a high isolation and a low-isolation switch. have.

In addition, the present invention can secure the internal isolation by using a low noise amplifier to separate the internal feedback oscillation and to protect each module, the output of the high power amplifier to minimize the radiation to the input antenna due to lack of isolation It has an excellent effect.

In addition, the present invention can share the radio module in the forward and reverse directions, not only can reduce the size of the housing, but also has an excellent effect of reducing the cost by the number of modules and power consumption.

Claims (6)

In the portable Internet relay device having a wireless module, A first switch 131 provided at a base station direction antenna side for transmitting a signal input through a first filter 111 from a base station (service providing system 1) to the wireless module; A second switch 132 provided at a subscriber direction antenna side for transmitting a signal input through a second filter 112 from a subscriber (mobile Internet terminal 3) to the wireless module; And A third switch 133 for transmitting a signal transmitted from the wireless module through the high power amplifier by the first switch or the second switch to a switch 131 or 132 opposite to an input; The wireless module, Two low-noise amplifiers (588a, 588b), switches (581), mixers (582, 584), SAW filters (583), attenuators (585), preamps (586), and filters (filters) that can be powered independently. (587) Mobile internet relay device comprising a. The method of claim 1, The first switch 131, the second switch 132 and the third switch 133 is composed of one switch module (230) Mobile internet relay device characterized in that. In the portable Internet relay device having a wireless module, A first circulator 321 provided at the base station directional antenna for transmitting a signal input from the base station (service providing system 1) through the first filter 311 to the wireless module; A second circulator 322 provided at a subscriber directional antenna side for transmitting a signal input through a second filter 312 from a subscriber (mobile Internet terminal 3) to the wireless module; And And a third switch 333 for transmitting the signal transmitted from the wireless module through the high output amplifier to the circulator 321 or 322 opposite to the input through the fourth switch 334 or the fifth switch 335. But The wireless module, Two low-noise amplifiers (588a, 588b), switches (581), mixers (582, 584), SAW filters (583), attenuators (585), preamps (586), and filters (filters) that can be powered independently. (587) Mobile internet relay device comprising a. The method of claim 3, wherein The third switch 133, the fourth switch 134 and the fifth switch 135 is composed of one switch module (430) Mobile internet relay device characterized in that. The method of claim 3, wherein A first switch 331 for transmitting a signal transmitted through the first circulator 321 to the wireless module; And A second switch 332 for transmitting a signal transmitted through the second circulator 322 to the wireless module Mobile internet relay device further comprising. The method according to any one of claims 1 to 5, The wireless module, Can be used in combination with at least one wireless module using combiner 589b and divider 589a Mobile internet relay device characterized in that.

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