JP2872112B2 - Mobile communication device control equipment for packet communication - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control apparatus for a mobile station for digital mobile communication of the TDMA system, and more particularly to a control apparatus for a mobile station transmitting packet data.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 7, 3TDMA processing is performed by using a mobile device including a TDMA processing unit 1, a quadrature modulator 2, a power module 3, and a transmission ON / OFF control unit 4.
Intermittent transmission in which only one of the wireless slots is transmitted is performed.

[0003] Transmission packet data is transmitted to a TDMA processing unit l.
Performs CRC coding, BCH coding, interleaving, and the like, and converts the data into a radio section format. The data converted to the radio section format by the TDMA processing unit 1 is
The signal is modulated by the quadrature modulator 2 into a transmission carrier. Further, the transmission wave modulated by the quadrature modulator 2 is amplified by the power module 3 to a predetermined output. Also, the power module 3
Transmission O for turning ON the transmission output of only a predetermined TDMA slot in a wireless section by a burst signal from the TDMA processing unit 1
It was controlled by the N / OFF control unit 4. In this case, in order to prevent transistor damage due to a rise in the temperature of the power module 3, that is, a rise in the temperature of the transistor inside the power module, intermittent transmission in which only one of the 3TDMA radio slots is transmitted is performed in the wireless section. Was.

Further, using a mobile unit having the same configuration as described above,
The power module 3 is composed of a high-efficiency transistor that generates less heat and a large-area ripening plate that cools the ripening of the transistor. The transmission of 3TDMA continuous slots is realized by suppressing the temperature rise of the transistor. Was.

[0005]

The above-mentioned conventional mobile station control system has an advantage that an inexpensive and small-sized power module can be used, but on the other hand, the internal transistor is prevented from being damaged by heat generated by continuous slot transmission. Since packet data is transmitted using only one or two time slots of the 3TDMA time slots in the wireless section, the transmission efficiency of the packet data is significantly reduced.

A system using a high-efficiency transistor and a heat radiating plate having a high ripening effect in order to suppress a rise in the temperature of the transistor has the advantage that continuous slot transmission can be performed, but the cost of the mobile device is low. And hindered miniaturization and weight reduction.

An object of the present invention is to eliminate the above-mentioned disadvantages,
It is an object of the present invention to provide a control apparatus for a mobile station for packet data communication, which enables highly efficient transmission of packet data and enables the manufacture of a small, lightweight and low-cost mobile station.

[0008]

SUMMARY OF THE INVENTION In order to control the temperature of a transmission amplification unit, a control apparatus for a packet communication mobile device according to the present invention controls a transmission amplification unit detected by a temperature sensor installed near the transmission amplification unit. Temperature information or TDM used for transmission
TDMA to be transmitted based on A radio time slot information
It is characterized in that radio time slots are continuously used or intermittently used and switched.

According to the present invention, by controlling the TDMA processing unit and the transmission amplification unit, an inexpensive and small power module that cannot withstand continuous transmission for a long time is used, and highly efficient transmission of packet data is realized. Becomes possible.

[0010]

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

FIG. 1 shows the present invention applied to a mobile device having a function of performing UPCH (user packet channel) communication of a digital type mobile telephone system of the PDC system (RCR-27E Foundation IRR System Development Center). FIG. 3 is a block diagram illustrating a first embodiment to which the present invention is applied. In this embodiment, the input packet data is CRC-encoded and BCH
A TDMA processing unit 1 for converting to a signal format of a radio section such as encoding and interleaving and generating transmission data of a radio slot timing to be transmitted, and a TDMA processing unit 1
A quadrature modulator 2 for modulating a transmission carrier with the transmission data converted in step 1, a power module 3 for amplifying an RF signal modulated by the quadrature modulator 2 to a predetermined output, and a radio slot used for transmitting packet data. Transmission ON / OF that controls to turn ON the transmission output of power module 3 only
A temperature sensor 5 provided in the vicinity of the power module 3 as means for realizing a control method characterized by the present invention, and a signal transmitted from the temperature sensor 5. A transmission mode selection unit 6 for determining a radio slot. The power module 3 used here is an inexpensive and small component that guarantees a continuous transmission time of less than one minute.

Next, the operation of the first embodiment will be described in detail with reference to the drawings. FIG. 2 is a timing chart showing the operation of the present embodiment, and FIG. 3 is a view showing a temperature change of the power module. First, packet data to be transmitted from the mobile station is input to the TDMA processing unit 1, and in order to transmit the packet data with high efficiency, as shown in FIG. 2, continuous data from slot 0 (SLT0) to slot 2 (SLT2). Transmission data converted to a wireless section format using a wireless time slot is generated. This transmission data is sent to the power module 3 via the quadrature modulator 2. On the other hand, the transmission ON / OFF control unit 4 turns on the transmission output of the power module 3 based on the timing signal for transmitting the transmission data from the TDMA processing unit 1.

At this time, since the power module 3 continuously outputs the transmission power, the temperature gradually rises as shown in FIG. The transmission mode selection unit 6 obtains this temperature information from the temperature sensor 5 provided in the vicinity of the power module 3, and monitors whether or not the temperature exceeds a preset threshold value. The threshold value is set to a temperature lower than the absolute maximum rated temperature of the power module 3, and even if the power module 3 is continuously operated at the threshold temperature, no damage is caused. When continuous transmission is continued, the transmission mode selection unit 6 detects that the threshold has been reached, and sends a control signal for switching from the continuous transmission mode to the intermittent transmission mode to the TDMA processing unit l.

The TDMA processing unit 1 converts the packet data into a radio section format using only the slot 0 (SLT0) according to the control signal,
An intermittent timing signal is sent to the OFF control unit 4. The transmission ON / OFF control unit 4 controls ON / OFF of the transmission output of the power module 3 based on the timing signal from the TDMA processing unit l. The temperature of the power module 3 stops increasing due to the intermittent transmission control. Thereafter, the temperature of the power module decreases as the transmission of the packet data ends.

Next, a second embodiment to which the present invention is applied will be described. FIG. 4 is a block diagram showing a second embodiment of the present invention. In this embodiment, similarly to the first embodiment, a TDMA processing unit 1 that converts input packet data into a signal format of a radio section and generates transmission data of a radio slot timing to be transmitted, and a quadrature modulation unit 2
, Power module 3 and transmission ON / OFF control unit 4
And a transmission mode control unit 7 for determining a radio slot to be transmitted based on a timing signal from the TDMA processing unit 1 as means for realizing a control method characterized by the present invention. .

Next, the operation of the second embodiment will be described in detail with reference to the drawings. FIG. 2 is a timing chart showing the operation of the present embodiment, FIG. 3 is a diagram showing a temperature change of the power module, and FIG. 5 is a flowchart showing the operation of the present embodiment. When the power of the mobile device is turned on, the transmission mode control unit 7 starts the process shown in the flowchart of FIG. First, the counter n is initialized with the number of continuously transmittable slots. The number of continuously transmittable slots is a value in which the absolute maximum rated operating temperature of the power module 3 used in the mobile device has been obtained in advance through experiments or the like. Next, the transmission mode control unit 7 notifies the TDMA processing unit 1 of the continuous transmission mode. Thereafter, according to the flowchart, 6.6 ms (one-third of the subframe 20 ms)
Loop every cycle). While packet data is not transmitted from the mobile device, the value of the counter n holds the initialized value.

Here, when the packet data transmitted from the mobile station is input to the TDMA processing unit 1, in order to transmit the packet data with high efficiency, as shown in FIG. 2, the slot 0 (SLT0) to the slot 2 ( Transmission data converted into a wireless section format using continuous wireless time slots of SLT2) is generated. This transmission data is sent to the power module 3 via the quadrature modulator 2. On the other hand, the transmission ON / OFF control unit 4 is based on a timing signal for transmitting transmission data from the TDMA processing unit l.
The transmission output of the power module 3 is turned on. At this time,
Since the power module 3 continuously outputs the transmission power, the temperature gradually increases as shown in FIG. In addition, the transmission mode control unit 7 decrements the value of the power counter n by 1 each time 1 radio time slot is transmitted according to the flowchart.

Further, if the transmission data is continuously transmitted,
The value of the counter n becomes 0, and the transmission mode control unit 7
The DMA processing unit 1 is notified of the intermittent transmission mode. T
The DMA processing unit 1 converts the repacket data into a wireless section format using only the slot 0 (SLT0) according to the control signal, and also controls the transmission ON / OFF control unit 4
, An intermittent timing signal is transmitted. The transmission ON / OFF control unit 4 controls ON / OFF of the transmission output of the power module 3 based on the timing signal from the TDMA processing unit l. The temperature of the power module 3 is
The rising is stopped by this intermittent transmission control. Thereafter, the temperature of the power module decreases as the transmission of the packet data ends.

[0019]

As described above, according to the present invention, whether the wireless time slots to be transmitted are continuously used based on the temperature information of the power module by the temperature sensor or the wireless time slot information used for the transmission. Switching between intermittent use has the effect of enabling highly efficient packet data transmission using an inexpensive and small power module.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a timing chart showing the operation of the present embodiment.

FIG. 3 is a diagram showing a temperature change of a power module.

FIG. 4 is a block diagram showing a second embodiment of the present invention.

FIG. 5 is a flowchart illustrating the operation of the present embodiment.

FIG. 6 is a block diagram showing a conventional example.

FIG. 7 is a timing chart showing the operation of the conventional example.

[Description of Signs] 1 TDMA processing unit 2 Quadrature modulator 3 Power module 4 Transmission ON / OFF control unit 5 Temperature sensor 6 Transmission mode selection unit 7 Transmission mode control unit

Claims (6)

(57) [Claims] In a control apparatus of a mobile station for packet communication having a packet data communication function in a digital mobile communication system of a TDMA system, temperature information of a transmission amplification section detected by a temperature sensor installed near a transmission amplification section. If the temperature of the transmission amplifier is equal to or less than a preset threshold, packet data is transmitted in continuous wireless time slots, and if the temperature is equal to or greater than the threshold, packet data is intermittently transmitted to wireless time slots. A mobile communication device control device for packet communication. 2. The control device according to claim 1, wherein the threshold value is set to a temperature lower than an absolute maximum rated temperature of the transmission amplifier. 3. A TDMA processing unit for converting input packet data into a signal format of a radio section and generating transmission data at a radio slot timing for transmission, and modulating a transmission carrier with the transmission data converted by the TDMA processing unit. , A transmission amplifier for amplifying the RF signal modulated by the quadrature modulator to a predetermined output, a temperature sensor provided near the transmission amplifier, and a packet based on the signal from the temperature sensor. A transmission mode selector for determining a wireless time slot to be used for data transmission, and a transmission ON for controlling to turn on the transmission output of the transmission amplifier only for the wireless time slot determined by the transmission mode selector.
A control device for a mobile station for packet communication, comprising: 4. A method of controlling a mobile station for packet communication in a TDMA digital mobile communication system, comprising:
TDMA to be transmitted to control the temperature of the transmission amplifier
A method for controlling a mobile station for packet communication, comprising switching between continuous use and intermittent use of wireless time slots. 5. The method according to claim 4, wherein the switching is performed based on temperature information obtained from a temperature sensor installed near the transmission amplifier. 6. The TDMA used for transmission, wherein the switching is
The method according to claim 4, wherein the control is performed based on wireless time slot information.