KR100347751B1 - Apparatus for alteration channel bandwidth of mobile station in mobile communication system - Google Patents

Abstract

The present invention relates to an apparatus for changing a channel bandwidth of a terminal in a mobile communication system that enables a terminal to roam a service between subscribers having different channel bandwidths by implementing a multi-channel bandwidth. By constructing two RF paths with different channel bandwidths, and adding a control switch to control the two RF paths, the RF signal path is formed only in the selected path, and the remaining RF path By controlling the inflow, it realizes a multi-channel bandwidth. Second, configure two RF paths with different channel bandwidths, distribute one input signal to two RF paths using a 2-way splitter, and turn off the amplifiers on one side of the RF path through bias control in the power control section. The multi-channel bandwidth is realized by controlling only to drive the amplifier of the other RF path.

Description

Apparatus for alteration channel bandwidth of mobile station in mobile communication system}

The present invention relates to a channel bandwidth change of a mobile station in a code division multiple access (CDMA) mobile communication system. In particular, the present invention relates to a service between subscribers having different channel bandwidths by implementing a multi-channel bandwidth. The present invention relates to an apparatus for changing a channel bandwidth of a terminal in a mobile communication system capable of roaming.

In general, in an IMT-2000 system or a wireless subscriber network system (WLL system) being developed as a next generation mobile communication system, the channel bandwidth is not constant, and each operator may have various channel bandwidths.

For example, in the United States, various channel bandwidths, such as 5 MHz and 10 MHz, may be selected by an operator, and in a cellular system, the channel bandwidth is 1.23 MHz.

Therefore, in the related art, when a terminal having one channel bandwidth is set to receive a service of an operator having a different channel bandwidth, a problem arises in that the channel bandwidths cannot be roamed with each other.

In other words, the terminal that has emerged up to now is fixed to one channel bandwidth to communicate, so that the service channel bandwidth of the other operators can not use the system, and for reasons known as roaming between operators with different channel bandwidths Service was not available.

Therefore, the present invention has been proposed to solve the above problems of the prior art,

An object of the present invention is to provide an apparatus for changing a channel bandwidth of a terminal in a mobile communication system that enables a terminal to roam services between subscribers having different channel bandwidths by implementing a multi-channel bandwidth.

The present invention for achieving the above object,

First, configure two RF paths with different channel bandwidths, and add a control switch to control the two RF paths so that the RF signal path is formed only in the selected path, and the remaining unselected paths By controlling the inflow of the RF signal, a multi-channel bandwidth is realized.

Second, configure two RF paths with different channel bandwidths, distribute one input signal to two RF paths using a 2-way splitter, and turn off the amplifier in one RF path through bias control in the power control. The multi-channel bandwidth is realized by controlling only the amplifier of the other RF path to be driven.

1 is a circuit diagram showing a first embodiment of a device for changing the channel bandwidth of a terminal in a mobile communication system according to the present invention,

2 is a circuit diagram illustrating a second embodiment of a device for changing a channel bandwidth of a terminal in a mobile communication system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

101, 201: control unit 102: power supply unit

103, 112: first and second RF path control switch

104, 204: first amplifier 106, 206: second amplifier

108,208: third amplifier 110,210: fourth amplifier

203: signal divider 212: combiner

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention according to the technical spirit as described above.

Example 1

1 is a view showing a first embodiment of a device for changing the channel bandwidth of a terminal in a mobile communication system according to the present invention.

Here, reference numeral 101 denotes a controller for generating first and second switch control signals and simultaneously outputting a power control signal so that a channel bandwidth capable of interfacing with the base station is set, and reference numeral 102 denotes a controller that is output from the controller 101. The power supply unit supplies power for driving the amplifier on the RF path according to the power control signal.

In addition, reference numeral 103 denotes a first RF path control switch for transmitting an RF signal input according to the first switch control signal output from the controller 101 to only one RF path of two RF paths, and reference numeral 104. Denotes a first amplifier for amplifying and outputting a signal through the first RF path control switch 103 to a predetermined level, and reference numeral 105 denotes only a frequency of a specific band in the signal through the first amplifier 104. A first SAW filter is shown, and reference numeral 106 denotes a second amplifier for amplifying and outputting a signal through the first saw filter 105 to a predetermined level, and reference numeral 107 denotes the second amplifier 106. A second saw filter that passes only a frequency of a specific band in a signal output from.

Further, reference numeral 108 denotes a third amplifier for amplifying and outputting the signal through the first RF path control switch 103 to a predetermined level, and reference numeral 109 denotes a specific band in the signal through the third amplifier 108. A third SAW filter for passing only a frequency of?, And reference numeral 110 denotes a fourth amplifier for amplifying and outputting a signal through the third saw filter 109 to a predetermined level, and reference numeral 111 denotes the third filter. The fourth saw filter passes only a frequency of a specific band in the signal output from the fourth amplifier 110.

Further, reference numeral 112 denotes a second signal outputting an RF signal output from the second saw filter 107 or the fourth saw filter 111 according to a second switch control signal output from the controller 101 as a transmission signal. It consists of 2 RF path control switches.

The first embodiment according to the present invention configured as described above,

First, the control unit 101 generates a switch control signal to set a channel bandwidth that can interface with the base station, and generates a power control signal to supply power to the amplifier.

The power control unit 102 then supplies the driving power for the first and second amplifiers 104 and 106 on the first RF path and the third and fourth amplifiers 108 and 110 on the second RF path.

In this state, the first RF path control switch 103 transfers the RF signal input according to the switch control signal output from the controller 101 to only one RF path of two RF paths.

That is, the first RF path control switch 103 has one input line and two output lines, and serves to connect the input RF signal to only one of the two output lines.

If the first RF path control switch 103 connects the RF signal input through the first RF path, the first amplifier 104 amplifies the input signal to a predetermined level and the first saw filter 105. Pass only the specific band. The second amplifier 106 amplifies the signal through the first saw filter 105 again, and the second saw filter 107 passes the signal through the second amplifier 106 only through a specific band.

The signal passing through the second saw filter 107 is transmitted to the second RF path control switch 112, and the second RF path control switch 112 is operated according to the switch control signal output from the controller 101. The output signal of the first RF path is selected and output.

On the other hand, when the first RF path control switch 103 connects the input RF signal to the second RF path, the third amplifier 108 amplifies the input signal to a predetermined level, and the third saw filter 109. Passes only the specific band. In addition, the fourth amplifier 110 amplifies the signal through the third saw filter 109 again, and the fourth saw filter 111 passes the signal through the fourth amplifier 110 again only a specific band.

The signal passing through the fourth saw filter 111 is transmitted to the second RF path control switch 112, and the second RF path control switch 112 is operated according to the switch control signal output from the controller 101. The output signal of the second RF path is selected and output.

Here, the signals on the first RF path and the second RF path are frequencies of different bands, for example, the signal on the first RF path is 5 MHz, the signal on the second RF path is 10 MHz, and on each path The band is determined by the saw filter located.

Example 2

2 is a diagram illustrating a second embodiment of a device for changing a channel bandwidth of a terminal in a mobile communication system according to the present invention.

Here, reference numeral 201 denotes a controller which receives the channel bandwidth information of the service provider from the base station and outputs a power control signal so that the channel bandwidth corresponding to the received channel bandwidth information is set. Reference numeral 202 denotes the controller 201. A power control unit for controlling the supply power of the plurality of amplifiers on the RF path in accordance with the power control signal output from the).

Also, reference numeral 203 denotes a signal divider for distributing an input RF signal into two RF paths, and reference numeral 204 is output from the signal divider 203 according to a power control signal output from the power control unit 202. A first amplifier amplifies and outputs an RF signal to a predetermined level, and reference numeral 205 denotes a first SAW filter that passes only a frequency of a specific band in a signal through the first amplifier 204. 206 denotes a second amplifier for amplifying and outputting a signal through the first saw filter 205 to a predetermined level according to a power control signal output from the power control unit 202, and reference numeral 207 denotes the second amplifier ( A second saw filter that passes only frequencies of a specific band in the signal output from 206.

In addition, reference numeral 208 denotes a third amplifier for amplifying and outputting a signal through the signal splitter 203 to a predetermined level according to the power control signal output from the power control unit 202, and reference numeral 209 denotes the third amplifier. A third SAW filter for passing only a frequency of a specific band in the signal through the amplifier 208, and the reference numeral 210 denotes a fourth to amplify and output the signal through the third saw filter 209 to a predetermined level The reference numeral 211 denotes a fourth saw filter that passes only a frequency of a specific band in the signal output from the fourth amplifier 210.

Also, reference numeral 212 denotes a combiner for combining and outputting RF signals output from the second saw filter 207 and the fourth saw filter 211, respectively.

The second embodiment according to the present invention configured as described above,

First, the control unit 201 receives the channel bandwidth information of the service provider from the base station, and generates a power control signal to correspond to the channel bandwidth information of the service provider.

Accordingly, the power control unit 202 selectively supplies the driving power of the first and second amplifiers 204 and 206 on the first RF path and the third and fourth amplifiers 208 and 210 on the second RF path. Do it.

That is, the power control unit 202 may generate a constant bias of the amplifiers 204 and 206 on the first RF path or the amplifiers 208 and 210 on the second RF path according to the power control signal output from the control unit 201. Bias) Drive amplifier selectively by supplying or cutting off power.

In this state, the signal distributor 203 distributes the input RF signal to two RF paths.

Here, when the power supply controller 202 supplies bias power to the first and second amplifiers 204 and 206 on the first RF path, the first amplifier 204 is driven to drive the signal divider 203. The signal of the first distributed RF path is amplified to a predetermined level, and the first saw filter 205 passes only a specific frequency band in the amplified signal. The second amplifier 206 is also driven by a bias power source input in the same manner as the first amplifier 204 to amplify the signal through the first saw filter 205, and the second saw filter 207 Pass the signal through the second amplifier 206 only a specific band.

Meanwhile, when the power control unit 202 supplies bias power to the third and fourth amplifiers 208 and 210 on the second RF path, the third amplifier 208 is driven to drive the signal divider 203. Amplify the signal distributed at the predetermined level, and pass only a specific band in the third saw filter 209. In addition, the fourth amplifier 210 is also driven according to the bias power supplied in the same way as the third amplifier 208 to amplify the signal through the third saw filter 209, and in the fourth saw filter 211 Again, the signal through the fourth amplifier 210 passes only a specific band.

The combiner 212 then combines and outputs the output signal of the second saw filter 207 and the output signal of the fourth saw filter 211, where the combiner 212 actually has a signal on one RF path. Only input is made.

Similarly to the first embodiment, which is also well known in the second embodiment, the signals on the first RF path and the second RF path are at different frequencies, for example, the signals on the first RF path are 5 MHz and on the second RF path. The signal is 10MHz and the band is determined by the saw filter located on each path.

According to the present invention described above, "the device for changing the channel bandwidth of a terminal in a mobile communication system", since a plurality of bandwidths may generate different frequencies with one terminal, a base station can be shared between operators using channel bandwidth with each other. There is an advantage.

In addition, since one terminal can be a channel interface of different bandwidths, there is an advantage that roaming service between the various operators is also possible, and as is well known, there is an advantage that the economics of the expansion of the number of base stations can be improved by sharing the base stations.

Claims (2)

In a mobile communication system comprising a base station, a control station, an exchange, and a terminal, A controller for generating first and second switch control signals so as to set a channel bandwidth that can interface with the base station, and outputting a power control signal; A power supply unit supplying driving power of an amplifier provided on an RF path according to a power control signal output from the controller; A first RF path control switch for transmitting an RF signal input according to the first switch control signal output from the controller to only one RF path of two RF paths; A first amplifier for amplifying and outputting a signal through the first RF path control switch to a predetermined level; A first saw filter for passing only frequencies of a specific band in the output signal of the first amplifier; A second amplifier for amplifying and outputting the output signal of the first saw filter to a predetermined level; A second saw filter for passing only a frequency of a specific band in the signal output from the second amplifier; A third amplifier for amplifying and outputting a signal through the first RF path control switch to a predetermined level; A third saw filter for passing only frequencies of a specific band in the output signal of the third amplifier; A fourth amplifier for amplifying and outputting the output signal of the third saw filter to a predetermined level; A fourth saw filter for passing only frequencies of a specific band in the output signal of the fourth amplifier; And a second RF path control switch configured to switch an RF signal output from the second saw filter or the fourth saw filter as a transmission signal according to a second switch control signal output from the controller. Device for changing channel bandwidth of a terminal in a mobile communication system. In a mobile communication system comprising a base station, a control station, an exchange, and a terminal, A controller for outputting a power control signal to set a channel bandwidth that can interface with the base station; A power control unit controlling supply power of a plurality of amplifiers on an RF path according to a power control signal output from the control unit; A signal distributor for distributing the input RF signal into two RF paths; A first amplifier for amplifying and outputting an RF signal output from the signal splitter to a predetermined level according to a power control signal output from the power control unit; A first saw filter for passing only frequencies of a specific band in the output signal of the first amplifier; A second amplifier amplifying and outputting the output signal of the first saw filter to a predetermined level according to a power control signal output from the power control unit; A second saw filter for passing only frequencies of a specific band in the output signal of the second amplifier; A third amplifier for amplifying and outputting a signal through the signal splitter to a predetermined level according to a power control signal output from the power control unit; A third saw filter for passing only frequencies of a specific band in the output signal of the third amplifier; A fourth amplifier for amplifying and outputting the output signal of the third saw filter to a predetermined level; A fourth saw filter for passing only frequencies of a specific band in the signal output from the fourth amplifier; And a combiner configured to combine and output the RF signals output from the second saw filter and the fourth saw filter, respectively.