KR0165610B1 - Mobile subscriber having power saving function through receiving pch. channel - Google Patents

Abstract

The present invention saves power by adjusting the number of times of reception of the call channel, which eliminates unnecessary waste of power by omitting the repeated reception operation several times when the call channel (PCH) transmitted from the base station is stably received. It relates to a personal communication terminal equipped with; A personal communication terminal operating in a TDMA manner according to the GSM standard, comprising: a demodulator for demodulating an original code signal from a radio frequency signal received by an antenna, and decoding and deinterleaving the code data restored by the demodulator A baseband processing unit for executing the data; a LAPDm processing unit for processing the data output from the baseband processing unit to detect control data for the call channel transmitted from the base station; and whenever a call channel (PCH) is received by the LAPDm processing unit. A PCH counter for counting the number of reception times, a timer for generating predetermined time data for counting the reception interval of the call channel (PCH), a data memory for converting the average value of the call channel (PCH) reception intervals and storing them as reference data; Driving cycle of the demodulator when the call channel reception interval by the LAPDm processing unit is within the average reception interval By increasing by a predetermined multiple it is characterized in that a controller configured to control to execute a power saving function.

Description

Personal communication terminal with power saving function by adjusting call channel reception frequency

1 is a block diagram schematically showing the configuration of a personal communication system according to a time division multiple access (TDMA) scheme.

FIG. 2 is a diagram showing a frame structure of data transmitted and received between the terminal 1 and the base station 2 shown in FIG.

3 shows a 51-multiframe configuration of a control channel for transmitting and receiving control data between a base station 2 and a terminal 1;

4 is a diagram showing an internal configuration of a personal communication terminal having a power saving function through adjustment of a call channel reception frequency according to an embodiment of the present invention.

5 is a flowchart illustrating a process of calculating reference data for the function of the present invention.

6 is a flow chart for explaining the execution process of the power saving function according to the present invention.

* Explanation of symbols for main parts of the drawings

1 terminal 2 base station

3: base station controller 4: switchboard

5: Certification Center 21: Antenna

22: low noise amplifier 23: demodulator

24: baseband processing unit 25: LAPDm processing unit

26: speaker 27: microphone

28: voice processing unit 29: modulator

30: amplification unit 31: key input unit

32: display unit 33: control unit

34: program memory 35: data memory

36: A / D converter 37: timer

38: PCH Counter

The present invention relates to a personal communication terminal with a built-in power saving function. Particularly, in a state in which a call channel (PCH) transmitted from a base station is stably received, the repeated reception operation is omitted several times, thereby eliminating unnecessary power wastage. The present invention relates to a personal communication terminal having a power saving function by adjusting the number of reception of a call channel that can be eliminated.

Recently, with the rapid development of communication technology, a personal communication system has been developed and generalized so that an individual can communicate with another person while moving from an arbitrary place or from one place to another.

Such a personal communication system is largely divided into a time division multiple access (TDMA) system and a code division multiple access (CDMA) system. The TDMA system is widely used worldwide because of the high stability of the system and completeness of technology.

1 is a configuration diagram schematically showing the configuration of a personal communication system, in particular a TDMA system according to the TDMA method, in the cross-sectional reference numeral 1 is a terminal to be carried by the individual, 2 (2 ₁ ~ 2n) is a plurality of terminals ( 1) and a base station that transmits and receives data according to a predetermined standard, that is, a GSM (Global System for Mobil communication) standard, and performs transmission and reception of a radio signal to a terminal 1, conversion of a communication protocol, and encryption / decryption. ₁ to 3n) is a base station controller for managing a plurality of base stations (2: 2 ₁ to 2n) and performing functions such as allocation control and handover determination of communication channels for each terminal 1; A switch for linking the base station controller 3 and the landline communication network on the ground and the authentication center 5 to be described later, 5 having a unique number for each terminal 1 and the like for any terminal 1; Authenticator who executes licensing and billing A.

That is, in the personal communication system having the above configuration, when any terminal 1 is in a specific area, the base station 2 having jurisdiction over the area checks the existence of the corresponding terminal 1, and the base station controller 3 The base station controller 3 checks the registration status of the terminal 1 from the authentication center 5 and then uses the terminal 1 by allocating an encryption code necessary for a call through the base station 2. The terminal 1, which has completed the above-described registration and authentication procedures, is configured to be in an enabled state, and is connected to another terminal (not shown) registered in the base station 2 or a landline communication subscriber connected to the ground via the switch 4. You can make a call by receiving a call or calling a subscriber.

On the other hand, in the personal communication system described above, since the base station 2 and the terminal 1 transmit and receive data through a wireless carrier, the base station 2 and the terminal 1 are provided. In order to transmit / receive data between them, it is necessary to match the transmission / reception method or the specification of the transmission / reception data.

In consideration of this point, in general, in a TDMA type personal communication system, the system is configured according to the GSM (Global System for Mobile communication) standard. According to the GSM standard, the base station controller 3 and the base station 2 transmit and receive data according to the LAPD protocol, and the base station 2 and the terminal 1 perform the LAPDm protocol.

According to the GMS standard, the base station controller 3 and the base station 2 transmit and receive data according to the LAPD protocol, and the base station 2 and the terminal 1 perform the LAPDm protocol.

In addition, each base station (or terminal) has four radio carriers for data transmission and reception, and eight time slots (TS) for each radio carrier, and each time slot is configured to be 152.25 bits. In this case, each timeslot is allocated by the base station controller 3 for transmission of control data and traffic data of the terminal.

Meanwhile, the base station 2 and the terminal 1 operate on the basis of a clock of 13 MHz, and each bit constituting the timeslot TS has a length of 48 clocks, as shown in FIG. As described above, the eight timeslots TS are one frame, and in the case of control data, 51-multiframe or 102-multiframe including 51 or 102 frames, and 26 in the case of traffic data (voice and data) It consists of 26-multiframes including the number of frames, and 51 of these 26-multiframes or 26 of the 51-multiframes or 13 of 102-multiframes to form a super frame. It is supposed to be.

In the above configuration, the base station 2 transmits a frame start signal and a time slot number to be used to indicate the start time of a data frame to each terminal 1, and each terminal 1 transmits the frame start signal. After the synchronization with the base station 2 is synchronized with the base station 2 for data transmission and reception, various types of data, such as voice data or control data, are transmitted to and received from the base station 2 through the allocated time slot period of each data frame. It is designed to provide call function.

(A) and (b) of FIG. 3 show the configuration of 51-multiframe and 102-multiframe of control channels for transmitting and receiving control data between the base station 2 and the terminal 1, respectively. down link) is a result of collecting data received through a timeslot assigned to a specific terminal, and uplink (uplink) inversely collects timeslots transmitted by the terminal to the base station 2 side. The results are shown.

In FIG. 3, reference numeral F denotes a frequency correction channel (FCCH) for frequency correction of the terminal, S denotes a synchronization channel (SCH) for the terminal to synchronize frame synchronization with the base station, and B denotes various types of base stations for the terminal. A broadcast control channel (BCCH) for transmitting various data necessary for a terminal to access a base station, such as a status or information of neighboring base stations, and C is an access permission channel (AGCH) for a response to an outgoing request from the terminal. Or a common control channel (CCCH) for transmitting and receiving various control data such as a call channel (PCH) for transmitting a call signal to a terminal or a fast combined control channel (FACCH) for a handover function. It shows a random access channel (RACH) for requesting a call setup for or responding to a call signal from a base station.

In addition, D0 to D7 shown in FIG. 3 (b) are independent control channels (SDCCH) for performing authentication processing to register a terminal or transmitting and receiving various control data related to call setup. It is a low speed combined control channel (SACCH) for proceeding connection processing or transmitting and receiving signal strength and timing advance value during a call with another terminal. In some cases, the frame structure of the various control channels described above is partially transformed and combined within the GSM standard to transmit and receive necessary control data.

On the other hand, the terminal 1 drives the internal transmitter and receiver only during the transmission and reception time intervals of the self time slots allocated based on the clock synchronized with the base station 2, and the power consumed by the terminal is wireless. The power consumption is the largest in the signal transmission section, followed by the frequency synthesis section for high frequency synthesis, the driving of the demodulation stage for reception, and the baseband processing.

As described above, when there is a call request for a terminal that has completed the registration and authentication procedure, the base station transmits a call signal through a call channel (PCH) to the corresponding terminal, where the base station transmits the call channel (PCH). Since the call channel is stably received within the service area of the base station, the terminal may waste power by receiving the call channel repeatedly transmitted at regular intervals every time. There is no need.

The present invention has been made in view of the above circumstances, and when the terminal receives the call channel stably for a predetermined time, when the call channel (PCH) is stably received, the reception interval is set to be wider for subsequent call channels. It is an object of the present invention to provide a personal communication terminal having a power saving function by adjusting the number of reception of a call channel to reduce power consumption due to a call channel reception.

Personal communication terminal having a power saving function by adjusting the call channel reception frequency according to the present invention for realizing the above object in the personal communication terminal operated by the TDMA method according to the GSM standard, the original from the radio frequency signal received by the antenna A demodulation section for demodulating a code signal of the baseband, a baseband processing section for decoding and deinterleaving the code data restored by the demodulation section, and processing the data output from the baseband processing section to a call channel transmitted from a base station. A LAPDm processing unit for detecting control data for a PC, a PCH counter for counting the number of times of reception of the call channel PCH by the LAPDm processing unit, and generating predetermined time data for counting the reception interval of the call channel PCH. It is used to convert the average value of timer and call channel (PCH) reception intervals and store it as reference data. And a controller for controlling to execute the power saving function by increasing the driving period of the demodulator by a predetermined multiple when the call channel reception interval by the LAPDm processing unit is within an average reception interval.

That is, according to the present invention having the above-described configuration, in the state in which the call channel (PCH) transmitted from the base station is stably received, the repeated reception operation for several times can be omitted, thereby eliminating unnecessary waste of power.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention.

4 is a circuit diagram illustrating a configuration of a personal communication terminal having a power saving function through adjustment of a call channel reception frequency according to an embodiment of the present invention. In FIG. Low noise amplifier composed of a low noise amplifier or the like which amplifies the frequency signal received by the antenna 21, and 23 denotes an original signal from the frequency signal inputted through the low noise amplifier 22. And a demodulation section for demodulating the code signal.

Further, reference numeral 24 denotes interleaving, block coding, and convolutional coding for data transmitted and received through the demodulator 23 and the modulator 29 to be described later. The baseband processor 25, which executes coding, is a LAPDm processor that processes control data transmitted / received in accordance with the LAPm standard.

Further, reference numeral 26 denotes a speaker for outputting an audio signal from an opposite station terminal as an audible voice, 27 is a microphone for converting and inputting a user's voice input as an electrical voice signal, and 28 is an analog input from the microphone 27. A voice processor converts a voice signal into digital data, and converts voice data applied through the baseband processor 24 into an analog voice signal and outputs the voice signal to the speaker 26.

Further, reference numeral 29 denotes a modulator for modulating the transmission data output through the baseband processor 24 into a predetermined frequency signal, and 30 denotes an amplifier for amplifying the frequency signal modulated by the modulator 29. .

Reference numeral 31 denotes a key input unit having a plurality of numeric keys (10-keys) and function keys, and 32 denotes a display unit such as a liquid crystal display device for displaying various operation states or operation states of the terminal 1; 33 controls the use state of the terminal through transmission and reception with the base station 2 through the LAPDm processing unit 25 and controls the terminal 1 according to an operation signal input through the key input unit 31. The control unit 34 is a program memory in which the operation program of the control unit 33 is stored, and 35 is a data memory in which various processing data related to the operation of the control unit 33 are stored.

In addition, reference numeral 36 denotes an analog / digital converter for digitally converting the received data demodulated by the demodulator 23 and outputting a data value corresponding to the received power level to the controller 33. It is provided for base station selection or handover function.

On the other hand, reference numeral 37 is a PCH counter that counts the number of receptions each time the call channel PCH is received by the baseband processor 24, and 38 is a predetermined number for counting the reception interval of the call channel PCH. This timer generates time data.

Next, an operation of the device having the above configuration will be described with reference to the accompanying drawings.

In order to perform the power saving function in receiving the call channel (PCH), data on the time interval for receiving the call channel is usually required. The data for this is operated by the terminal 1 in a test mode. While the control unit 33 is collected and stored in the data storage unit 35 will be described with reference to the flow chart of FIG.

When the user selects a test mode key (not shown) provided in the key input unit 31 (ST1), the control unit 33 receives the broadcast control channel (BCCH) transmitted from the base station 2 to present By analyzing the information on the status of the base station of the current state of the operation of the wireless carrier to the shared structure (single group PCH) by multiple subscribers from the first, and then determine the PCH reception time interval calculated accordingly accordingly. ST2 ~ ST5)

Subsequently, the control unit 33 sets the call number to its own number (ST6), makes a connection request to the base station 2 (ST7), and after confirming that the registration and authentication procedures are completed (ST8), the base station When the encryption code is received from (2) (ST9), the PCH counter 38 and the timer 37 are set to calculate the reception interval of the call channel (PCH). (ST10)

The control unit 33 then checks whether the call channel is received through the LAPDm processing unit 25 (ST11), and when the call channel PCH is received, the current of the PCH counter 38 and the timer 37 is obtained. The count value is temporarily stored in its internal memory (ST12), and the count value of the PCH counter 38 is increased by '1'. (ST13)

On the other hand, the control unit 33 receives the call channel (PCH) 10 times and sets the average value of the reception interval as the reference data, and checks whether the count value of the PCH counter 38 is '10' (ST14), if it is not 10, the process returns to step ST11 and repeats the reception interval time calculation operation described above. Finally, when the count value of the PCH counter 38 reaches 10, the call channel ( PCH) After converting the average value of the reception intervals and storing and setting them in the data memory 35 (ST15), the series of data collection processes are terminated by releasing the connection (ST16).

On the other hand, the process of executing the power saving function according to the present invention based on the reference data for the call channel (PCH) receiving interval set by the above process will be described with reference to the flowchart of FIG.

In general, the terminal 1 having completed the registration and authentication procedure is configured to check the status of the base station through the broadcast control channel (BCCH) transmitted from the base station 2 even in the waiting state (ST20), and the controller 33 By analyzing the information on the status of the current base station, the operation status of the current wireless carrier is checked whether or not it is a shared structure (small group PCH) by several subscribers. Based on the result of the confirmation, the criteria of the corresponding PCH structure previously calculated Data is read from the data memory 35 to prepare a basis for a power saving function, and then is in a standby state. (ST21 to ST23)

Then, when the call channel (PCH) is transmitted from the base station 2, when the call channel reception is confirmed by the LAPDm processing unit 25 (ST24), the control unit 33 and the PCH counter 38 and The timer 37 is driven (ST25) to calculate the reception period of the call channel (PCH), and the calculated value is compared with previously stored reference data (ST 26 and ST 27). When the period is less than or equal to the value set as reference data, that is, when the call channel PCH is stably received, the call channel is received by setting the driving cycle of the demodulator 23 to receive the call channel PCH twice. When the power saving function is executed, and the reception state of the call channel is not good and is greater than the value set as the reference data, the control unit maintains the current demodulator driving cycle. (ST28)

On the other hand, the above operation is repeatedly performed until the user hears the call sound output through the speaker 26 and selects a call key (not shown) installed in the key input unit 31 to send a response to the call. If the user presses the call key to indicate the answer, the control unit 33 checks this (ST29) and executes the connection process to control the normal call operation.

That is, according to the embodiment, when the call channel (PCH) is stably received for a predetermined time when the terminal receives the call channel, by controlling the reception interval intermittently by setting the receiving interval wide for the subsequent call channel, It is possible to reduce the power consumption according to the call channel reception.

Meanwhile, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

Claims (1)

A personal communication terminal operating in a TDMA manner according to the GSM standard, comprising: a demodulator for demodulating an original code signal from a radio frequency signal received by an antenna, and decoding and deinterleaving the code data restored by the demodulator A baseband processing section for executing the data; a LAPDm processing section for processing data output from the baseband processing section to detect control data for the call channel transmitted from the base station; and whenever a call channel (PCH) is received by the LAPDm processing section. A PCH counter for counting the number of reception times, a timer for generating predetermined time data for counting the reception interval of the call channel (PCH), a data memory for converting the average value of the call channel (PCH) reception intervals and storing them as reference data; When the call channel reception interval by the LAPDm processing unit is within the average reception interval, the drive host of the demodulation unit And a control unit configured to control the execution of the power saving function by increasing the number of times by a predetermined multiple.