JPH1188084A - Base station device for simple portable telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base station device which can change a radio part maximum output value without affecting the whole base station device. SOLUTION: An operation possible output information table is generated in a control part 10 based on maximum output value information and power reduction possible information, which are inputted from the power amplifier 20 of a radio part 16. The control part 10 compares demand operation output information which is previously held by ROM 32 in the base station device or is designated from a base station operation management device with information of the operation possible output information table and decides an operation output value. Then, it sets the operation output value to the power amplifier 20 of the radio part 16. Even if the radio part 16 is exchanged, it is not necessary to change other function parts except for the radio part 16 such as the control part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station device for a portable telephone system.

[0002]

2. Description of the Related Art In recent years, a simplified portable telephone system (hereinafter abbreviated as PHS) using micro cells has been developed as one of digital mobile communication systems, and practical use has begun.

The PHS is constituted, for example, as follows. FIG. 4 is a diagram showing the basic configuration. That is, a plurality of base stations CS1 to CSm are distributed and transmit control information signals. The base stations CS1 to CSm are integrated services digital networks (hereinafter referred to as ISDN) having PHS connection devices.
(Abbreviated as a network) INW. Each of the mobile stations PS1 to PSn receives a control information signal output from any of the base stations CS1 to CSm in an area Z1, Z2,..., Zm formed by the base stations CS1 to CSm, respectively. Synchronized, when there is an incoming call from the network side or when a call is made from the mobile station side, a radio line is established and connected to the base station, and the connected base station To the wired telephones TEL1 to TELk or the mobile station PS1 via the ISDN network INW or the ISDN network INW and the subscriber telephone network SNW.
~ PSn can communicate with each other.

Here, base stations CS1 to CSm and mobile station P
Time division multiple access (TDMA: Time Division) as a wireless access method established between S1 and PSn.
onMultiple Access) method,
Further, as a transmission method, time division bidirectional multiplexing (TDD: Ti
(Me Division Duplex) method.

[0005] The frame structure of the TDMA-TDD system is as follows.
For example, as shown in FIG. 5, four transmission slots T1 to T4
And a reverse link in which four reception slots R1 to R4 are time-division multiplexed. One frame length is 5 msec, and transmission / reception transmission speed is 3
84 kbps, the slot length is 625 μsec, and the transmission rate per slot is 32 excluding the error correction code.
kbps.

[0006] A center CC is connected to the ISDN network INW via a packet network PNW. The center CC includes a location registration management device CC1 and a base station operation management device CC2.

[0007] The location registration management device CC1 includes a mobile station PS1.
To PSn and base stations CS1 to CSm, information on location registration is collected via the ISDN network INW and the packet network PNW, and the mobile stations PS1 to PSn are respectively registered and managed in which area Z1 to Zm each is currently located. .

[0008] The base station operation management device CC2 exchanges control information with the base stations CS1 to CSm to manage the base stations CS1 to CSm. By the way, in order to avoid radio interference with other base stations installed in the vicinity, the base station device reduces the output signal level by changing the attenuation value of the radio unit output unit or expands the service area. For this purpose, it is considered that the operation is performed at the maximum output value by changing the attenuation value in the same manner.

[0009]

However, conventionally, when a request for changing the maximum output value of the radio section has been made, it is necessary to change the apparatus including the control section in addition to the radio section output unit. When the output of the wireless unit is increased for reasons such as area enlargement, there is a problem that the entire apparatus must be changed.

The present invention has been made in view of such a problem, and eliminates the influence on the entire base station apparatus caused by the change of the radio section maximum output value in the base station apparatus, thereby facilitating the change of the radio section output value. It is an object of the present invention to provide a base station apparatus of a simplified mobile phone system that can be realized in a mobile phone.

[0011]

According to the present invention, there are provided a plurality of base stations arranged in a plurality of areas, a digital network to which the base stations are respectively connected, and a plurality of base stations moving between the plurality of areas. In a base station device of a simplified mobile phone system including a mobile station, a radio unit storing information on output, and when determining an operation output value of the radio unit, refer to the information on output stored in the radio unit. And control means for controlling the radio unit so as to determine an operation output value and output the operation output value at the determined operation output value.

With such a configuration, when the maximum output value needs to be changed, even if the wireless unit (wireless output unit) is replaced, the influence on the entire base station apparatus is eliminated, and the output of the wireless unit is reduced. The change of the value can be easily realized.

Here, the radio section may store the maximum output information and the power reduction information as information relating to the output.
Further, the present invention provides a digital network in which a plurality of base stations arranged in a plurality of areas, a digital network to which these base stations are respectively connected, a plurality of mobile stations moving between a plurality of areas, and a digital network. Connected
In a base station device of a simplified mobile phone system including a base station operation management device that specifies an operation output to the base station device, a radio unit storing information on output, and an operation output specified by the base station operation management device. When the reference, information on the output stored in the wireless unit, the operation output value is determined, and control means for controlling the wireless unit to output the determined operation output value, characterized by comprising: I do.

With such a configuration, in a system in which the operation output of each base station device is specified from the base station operation management device, it is necessary to change the maximum output value of the base station device for area expansion. In addition, even if the wireless unit (wireless output unit) is replaced, the change of the wireless unit output value can be easily realized without affecting the entire base station apparatus.

Here, the control means creates operable output information with reference to the information on the output stored in the radio section, for example, the maximum output information and the power reduction information, and outputs the operation output value from the base station operation management device. Is specified, reference is made to the operable output information to determine whether the specified operation output value is within the operable range, and if it is within the operable range, the operation output specified by the base station operation management device is performed. A configuration in which the radio unit is controlled so as to output with a value, and when exceeding the operable range, the radio unit is controlled so as to output with a predetermined output value and a notification is made to the base station operation management device. It may be.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. FIG. 1 shows a circuit configuration of an embodiment of the base station according to the present invention.

In FIG. 1, control signals relating to call control, location registration, base station operation management, and the like among signals input from the ISDN line to the line interface unit 11 are input to the control unit 10. An audio signal and a data signal to be transmitted to the mobile station side are transmitted to an ADPCM codec unit 14 via a data rate conversion unit 12 and an echo canceller unit 13.
Is input to the radio frame control unit 15 after the encoding process is performed. Radio frame control unit 1
In 5, the control signal for the mobile station supplied from the control unit 10 and the encoded voice signal and data signal supplied from the ADPCM codec unit 14 are slot-multiplexed, and then the radio unit (ie, radio output unit) 16 To the modulator 17. The signal modulated by the modulator 17 is mixed with a local oscillation signal from the synthesizer 19 by the transmission circuit 18 and converted to a predetermined frequency, and then the power amplifier 2
At 0, it is amplified to a predetermined transmission output. After that, transmission / reception switch 2
1, a plurality of antennas 23 through an antenna switch 22;
24 to the mobile station.

The received signals from the mobile station received by the plurality of antennas 23 and 24 are input to the receiving circuit 25 through the antenna switch 22 and the transmission / reception switch 21. Receiving circuit 25
Is mixed with the local oscillation signal from the synthesizer 19, frequency-converted into an intermediate frequency signal, demodulated by the demodulator 26, and demodulated by the demodulator 26.
And are separated for each slot. The control signal among the signals output from the radio frame control unit 15 is input to the control unit 10, and the encoded voice signal and data signal are input to the ADPCM codec unit 14 and subjected to decoding processing. The data is input to the line interface unit 11 via the data rate converter 12.

The audio signal and data signal input from the data rate converter 12 to the line interface 11 and
Control signals supplied from the control unit 10 relating to call control, location registration, operation management of the base station, and the like are transmitted from the line interface unit 11 to the ISDN line.

The control unit 10 includes an arithmetic processing unit (CPU) 3
1. It has a parallel input output (PIO) section 34 for transmitting and receiving control signals to and from the program storage ROM 32, RAM 33, and power amplifier 20, and performs various controls in the base station.

The power amplifier 20 of the radio section 16 stores maximum output value information and power reduction information. 2 is provided between the parallel input output (PIO) unit 34 of the control unit 10 and the power amplifier 20 of the wireless unit 16.
, N-bit lines MP1 to MPn for transmitting and receiving the maximum output value information and n for transmitting and receiving the power reduction information
Bit lines ATT1 to ATTn are provided.

In the base station apparatus configured as described above, the control unit 10 has control software for determining an output value to be operated as follows. This operation will be described with reference to FIG. First, the CPU 31 sets the PIO unit 3
4 to the line M from the power amplifier 20 of the radio unit 16
An operable output information table is created in the RAM 33 based on the maximum output value information and the power reduction information (a in FIG. 3) of the power amplifier 20 which are output via P1 to MPn and lines ATT1 to ATTn, respectively (FIG. 3). 3b). When determining the operation output, when the requested operation output information (c in FIG. 3) specified from the base station operation management device CC2 in FIG. 1 is input via the ISDN network INW, the CPU
31 is the input requested operation output information (c in FIG. 3);
The operation output value is determined by comparing the information with the operable output information table (b in FIG. 3), and the operation output value is controlled for the power amplifier 20 of the radio unit 16.

For example, the maximum output value is A, and the possible power reduction value is α.
Then, the operable output value ranges from A to (A-α). If the required operation output value B is within this range, the control unit 10 instructs the power amplifier 20 of the wireless unit 16 to attenuate the maximum output value A by (AB) from the maximum output value A. , The radio unit 16 operates with the output value as B.

On the other hand, the requested operation output value B is changed from A to (A−
When the required operation output value B is larger than A, or when the required operation output value B is smaller than (A-α), the control unit 10 controls the wireless communication. The power amplifier 20 of the unit 16 is controlled to operate with the output value A, and a rejection notification is issued to the base station operation management device CC2 according to a predetermined procedure.

Using the output determined in this way,
The transmission timing of the radio control channel to be used is determined by carrier sense or the like, and a communication service is provided to the mobile station.

As described above, in the above embodiment, the maximum output value information and the power reduction information are mounted on the wireless unit (wireless output unit) 16, for example, on the power amplifier 20, and these information are stored in the control unit. 10 so that the wireless unit (wireless output unit) 16 can be mechanically compatible, so that if the maximum output value needs to be changed, the wireless unit (wireless output unit) 16
Is performed without affecting other functional units other than the wireless unit (wireless output unit) 16, such as the control unit 10, that is, other functional units other than the wireless unit (wireless output unit) 16, such as It is not necessary to change the software of the control unit 10, and the maximum output value can be changed.

[0027]

As described above, according to the present invention,
It is possible to provide a base station apparatus of a simplified portable telephone system that can eliminate the influence on the entire base station apparatus due to the change in the radio section maximum output value and can easily change the radio section output value.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration of an embodiment of a base station according to the present invention.

FIG. 2 is a diagram showing an example of a configuration for transmitting and receiving information regarding output between a wireless unit and a control unit.

FIG. 3 is a diagram for explaining information when a control unit determines an operation output value.

FIG. 4 is a block diagram showing a basic configuration of a simplified mobile phone system.

FIG. 5 is a diagram showing an example of a frame configuration of the TDMA-TDD scheme.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Control part 11 ... Line interface part 12 ... Data rate conversion part 13 ... Echo canceller part 14 ... ADPCM codec part 15 ... Wireless frame control part 16 ... Wireless part (wireless output unit) 17 ... Modulator 18 ... Transmission circuit 19 ... Synthesizer 20 power amplifier 21 transmission / reception switch 22 antenna switch 23, 24 antenna 25 reception circuit 26 demodulator 31 arithmetic processing unit (CPU) 32 program storage ROM 33 RAM 34 parallel input output G (PIO) unit Z1, Z2,..., Zm area CS1 to CSm base station PS1 to PSn mobile station INW integrated service digital network (ISDN network) SNW subscribed telephone network PNW packet network CC center CC1 Location registration management device CC2: Base station operation management device

Claims (4)

[Claims] 1. A simplified type comprising: a plurality of base stations respectively arranged in a plurality of areas; a digital network to which these base stations are respectively connected; and a plurality of mobile stations moving between the plurality of areas. In the base station device of the mobile phone system, a radio unit storing information regarding the output, and when determining the operation output value of the radio unit, refer to the information regarding the output stored in the radio unit to determine the operation output value. And a control unit for controlling the radio unit so as to output the determined operation output value and the determined operation output value. 2. A simplified type comprising a plurality of base stations arranged in a plurality of areas, a digital network to which these base stations are respectively connected, and a plurality of mobile stations moving between the plurality of areas. In a base station device of a mobile phone system, a radio unit storing maximum output information and information on a possible power reduction, and when determining an operation output value of the radio unit, the maximum output information and the power reduction stored in the radio unit are determined. Control means for determining an operation output value with reference to the possible information and controlling the radio section so as to output the operation output value with the determined operation output value. apparatus. 3. A plurality of base stations arranged in a plurality of areas, a digital network to which the base stations are connected, a plurality of mobile stations moving between the plurality of areas, and the digital network. A base station apparatus for a simplified portable telephone system, the base station apparatus comprising: a base station operation management apparatus for designating an operation output to the base station apparatus; When the operation output is specified from, the control unit that determines the operation output value by referring to the information regarding the output stored in the radio unit and controls the radio unit to output the determined operation output value And a base station device for a simplified mobile phone system. 4. A plurality of base stations respectively arranged in a plurality of areas, a digital network to which these base stations are respectively connected, a plurality of mobile stations moving between the plurality of areas, and the digital network And a base station device of a simplified cellular phone system including a base station operation management device that specifies operation output to the base station device. The operable output information is created by referring to the information regarding the output, and when the operation output value is specified from the base station operation management device, the specified operation output value is operable by referring to the operable output information. Judge whether it is within the range or not, and when it is within the operable range, control the radio unit to output the operation output value specified by the base station operation management device. A control unit for controlling the radio unit so as to output a predetermined output value when it exceeds the operable range and for notifying the base station operation management device. Base station device for mobile phone system.