JPH07327270A - Digital cordless telephone system - Google Patents

Abstract

PURPOSE:To efficiently design an office establishment program by selecting a desired base station in an area where logical control channels of plural base stations are transmitted to a mobile station, and measuring and displaying the intensities of their received electric fields. CONSTITUTION:A special function key is inputted from the operation part 10 of the mobile station to start up an electric field intensity selective receiving means 13. When a logical control channel which is higher than a certain level is received while the mobile station is moved, the received electric field intensity level is stored in a temporary storage memory 12 and the received electric field intensity of the logical control channel having the highest reception level among the acquired logical control channels is displayed at a display part 11. In this case, the electric field intensity selecting and receiving means 13 displays the base stations of the logical control channels which can be received at the display part 11 in order, so a desired base station is selected from them through key operation from the operation part 10, thereby acquiring only the logical channel of the base station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to TDMA / T for performing time division multiple access and time division bidirectional transmission.
The present invention relates to a digital cordless telephone device which adopts the DD system and allows a mobile station to connect to both an indoor base station and an outdoor base station.

[0002]

2. Description of the Related Art FIG. 3 shows the configuration of a mobile station in a conventional digital cordless telephone device of this type. In FIG. 3, 101 is an antenna, which is connected to the wireless circuit 102. The radio circuit 102 transmits and receives radio data while being instructed by the radio control unit 103 on the frequency and the transmission / reception timing. A synthesizer 102a is built in the wireless circuit 102 and generates a frequency designated by the wireless control unit 103. A wireless control unit 103 measures the reception level from the received wireless data and performs wireless control. A channel codec unit 104 assembles and disassembles data transmitted and received on the wireless communication channel and the control channel. 105
Is a call control unit, which converts the digital audio data from the channel codec unit 104 into an analog signal and uses the receiver 10
6 to the channel codec unit 104 by converting the analog audio signal from the microphone 107 into a digital signal.
Transfer to. Reference numeral 106 is a receiver that outputs an analog signal as voice, and 107 is a microphone that converts the voice into an analog signal. Reference numeral 108 denotes a control unit configured by a microcomputer or the like, which gives a control instruction for the entire hardware. A memory unit 109 stores a control program, a system call code, and the like. Reference numeral 110 is an operation unit including various keys, and 111 is a display unit including a liquid crystal display.

The communication channel data is composed of information such as voice and control information processed by the control unit 108, and user data such as voice is processed without the control unit 108. When the control channel data and the communication channel control data are received from the antenna 101 via the wireless circuit 102, the channel codec unit 104 causes the control unit 1 to operate.
The reception is notified in 08. The reception timing is instructed from the channel codec unit 104 to the radio control unit 103 and the radio circuit 102 each time, and the reception frequency is previously set by the radio control unit 103 by the control unit 108 at each reception timing.
Set to. When transmitting the control data, the control unit 108 instructs the wireless control unit 103 and the wireless circuit 102 in advance about the transmission timing and transmits the data to the wireless circuit 102. The channel codec unit 104 also has a function of detecting the presence or absence of an error when receiving data and transferring the data together with the received data.

Next, the process of designing the station of the base station in the above conventional example will be described with reference to FIG. According to the conventional station placement design, first, as shown in (a), one base station A is installed, and the received electric field strength of the logical control channel (LCCH) of the base station A is measured by a dedicated measuring machine 200, and the measurement is performed. Machine 20
0 is gradually moved away from the base station A and the arrival area A of the received electric field is determined. Next, as shown in (b), the base station B is installed next to the base station A, and the area B is determined by the same method. Then, as shown in (c), the mobile station M is actually carried in the areas A and B to check whether there is an area in which a call cannot be made or received.

[0005]

However, in the above-mentioned conventional station design of the digital cordless telephone apparatus, a dedicated measuring machine is required for measuring the received electric field strength, and the logical control channels of a plurality of base stations are transmitted at the same time. In which area, which base station the logical control channel is to be captured is unknown, it is inefficient because it is necessary to turn on and off the power of the base stations one by one for measurement. In addition, even if the mobile station is actually carried after the base station is installed, to determine whether or not the areas of a plurality of logical control channels overlap each other, the number of base stations I had to turn it on and off, make and receive calls, and check.

The present invention solves such a conventional problem, and measures the reception electric field strength of a desired base station by a mobile station without turning on and off one base station at a time when designing a station. It is an object of the present invention to provide an excellent digital cordless telephone device that can be used.

[0007]

In order to achieve the above object, the present invention selects a desired base station from an area in which logical control channels of a plurality of base stations are transmitted to a mobile station, It is provided with an electric field strength selection receiving means for measuring and displaying the received electric field strength.

[0008]

Therefore, according to the present invention, the reception electric field strength of a desired base station can be achieved by a mobile station alone in an area where a plurality of base stations are present, and the base station can be set to one when designing a station.
Eliminates the need to turn on and off one by one and use a dedicated measuring machine.

[0009]

1 shows the structure of a mobile station of a digital cordless telephone system according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is an antenna, which is connected to the wireless circuit 2. The wireless circuit 2 transmits and receives wireless data while being instructed by the wireless controller 3 about the frequency and the transmission / reception timing. 2a is a synthesizer, and the wireless circuit 2
Built in, and generates a frequency designated by the wireless controller 3. Reference numeral 3 denotes a wireless control unit, which measures a reception level from received wireless data and performs wireless control. A channel codec unit 4 assembles and disassembles data transmitted and received on the wireless communication channel and control channel. A call control unit 5 converts the digital audio data from the channel codec unit 4 into an analog signal and outputs it to the receiver 6, and converts the analog audio signal from the microphone 7 into a digital signal and transfers it to the channel codec unit 4. Reference numeral 6 is a receiver that outputs an analog signal as voice, and 7 is a microphone that converts the voice into an analog signal. Reference numeral 8 is a control unit composed of a microcomputer or the like, which gives a control instruction for the entire hardware. 9
Is a memory unit for storing a control program, a system call code, and the like. Reference numeral 10 denotes an operation unit having various keys, 1
Reference numeral 1 is a display unit equipped with a liquid crystal display. Reference numeral 12 is a temporary storage memory for temporarily storing a reception level, system call code, etc. obtained from the wireless data received by the wireless control unit 3, and 13 is a plurality of base stations provided in the wireless control unit 3. It is a field strength selection receiving means for selecting a desired base station from among the above, measuring the received field strength, and displaying it on the display unit 11.

Next, the processing when designing a station in the above embodiment will be described with reference to FIG. First, a special function key is input from the operation unit 10 of the mobile station M to activate the electric field strength selection receiving means 13. Then, as shown in (a), the mobile station M
When the logical control channel of a certain level or higher is received while moving, the received electric field strength level is stored in the temporary storage memory 12, and the logical control with the highest receiving level among the logical control channels captured on the display unit 11 is stored. Displays the received field strength of the channel. In this case, the electric field strength selection receiving means 13 stores the base station ID of the logical control channel that can be received in the temporary storage memory 12 and sequentially displays it on the display unit 11. Therefore, a desired one (in this case, the base station A By selecting the base station ID of) by the key operation from the operation unit 10, it is possible to capture only the logical control channel of the base station A having the base station ID. After that, by such a base station ID fixed mode,
Further, the mobile station M is moved to measure the electric field strength of the base station A while observing the display unit 12 to determine the area A of the base station A. Next, as shown in (b), the electric field strength of the adjacent base station B is similarly measured in the base station ID fixed mode to determine the area B of the base station B. After finishing the station placement, as shown in (c), the base stations A and B
In the area where both of the two can be received, the base station ID fixed mode is ended by the operation of the operation unit 10 of the mobile station M, and after the logical control channels of a plurality of base stations can be captured, the actual arrival and departure by the mobile station M. Test the call. Thereby, it is possible to confirm that the areas of the plurality of logical control channels are overlapped and located by looking at the display unit 11 of the mobile station M.

As described above, according to the present embodiment, the mobile station selects a desired base station from a plurality of base stations and measures its received electric field strength when designing the base station station. Since the electric field strength selection receiving means 13 to be displayed on the display unit 11 is provided, the electric field strength of a desired base station can be measured by the mobile station alone.

[0012]

As is apparent from the above embodiment, the present invention selects a desired base station from the area in which the logical control channels of a plurality of base stations are transmitted to the mobile station, and the reception electric field strength thereof is selected. Since the mobile station alone can perform the reception field strength of a desired base station in an area where there are a plurality of base stations, the base station can be set to 1 when the base station is designed. There is an effect that it is possible to efficiently perform station design without having to turn on and off each of the units or use a dedicated measuring machine.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing the configuration of a mobile station of a digital cordless telephone device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing processing when designing station placement of a base station in the device.

FIG. 3 is a schematic block diagram showing a configuration of a mobile station of a digital cordless telephone device in a conventional example.

FIG. 4 is a schematic diagram showing processing when designing station placement of a base station in the same device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 antenna 2 radio circuit 3 radio control circuit 4 channel codec section 5 call control section 6 receiver 7 microphone 8 control section 9 memory section 10 operation section 11 display section 12 temporary storage memory 13 electric field strength selection receiving means

Claims (1)

[Claims] 1. A TDMA / TDD system for performing communication by time division multiple access and time division bidirectional transmission,
In a digital cordless telephone device in which a mobile station can be connected to both an indoor base station and an outdoor base station, the mobile station desires from the area where the logical control channels of a plurality of base stations are transmitted when designing a base station station. , A digital cordless telephone device equipped with an electric field intensity selection receiving means for measuring the received electric field intensity of the selected base station and displaying the electric field intensity.