KR20000061118A - Method for saving battery of mobile in wireless communication system - Google Patents

Abstract

PURPOSE: A method for controlling a power of a terminal in a wireless communication system is provided not to synchronize a frequency while not making a call in order to minimize the power consumption of the terminal. Consequently, the time for using the terminal can be maximized CONSTITUTION: When a subscriber inputs a terminal number, a wireless communication system analyzes the number and then, transmits a call signal including a preamble signal to the terminal on the basis of user identification with the analyzed number. The wireless communication system does not detect a place of the terminal but only searches the preamble signal continuously while the subscriber does not make a call. Once the terminal receives the call signal and a preamble detector at the terminal detects the preamble signal, the ID code (Identification code) at the preamble signal is compared with the ID code at EPROM (Erasable and Programmable Read Only Memory). If those two ID codes do not coincide with each other, the preamble signal is ignored. Otherwise, the terminal transmits a connect request signal to a base station after converting a standby mode to an active mode. The connect request signal is transmitted to a MSC (Mobile Switching Center) in succession, and the MSC connects a calling to the terminal after transmitting an acknowledge signal to the terminal. Thereby, as the preamble signal is supposed to be processed before the terminal searches a pilot channel, a lot of power required for searching the pilot channel can be saved.

Description

Power control method of terminal in wireless communication system {METHOD FOR SAVING BATTERY OF MOBILE IN WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a method of controlling the power of a mobile unit in a wireless communication system, and more particularly, a mobile terminal while the mobile terminal does not use a standby mode (STANDBY MODE). Minimize the battery consumption of the terminal by not locating the unit, and when a call signal is received by the terminal, the call can be made by switching from the sleep mode to the active mode using the preamble signal. The present invention relates to a method for performing power control of a terminal.

In general, one of the reasons for the very low transmission power of the terminal is to reduce the energy consumption of the terminal, but can not transmit a signal of too low power. This is because the signal is not decoded at the receiver. If too low a signal is received, the established connection between the terminal and the base station is discarded.

Accordingly, the base station determines the reverse link power control command bit based on the signal power to noise ratio (ie, Eb / No) of the traffic channel transmitted from the terminal, and the terminal uses the command bit received from the base station to transmit power of the power amplifier. Adjust Accordingly, when controlling the reverse link power, the transmit power of the terminal is increased or decreased by the power amplifier, so that the transmit power of the terminal is compared by comparing the power control reference value (Ec / It) without controlling the transmit power uniformly regardless of the importance of signal information and traffic information. Method for increasing or decreasing the amount is disclosed in Korean Laid-Open Patent Publication 98-46879.

However, all these methods are designed to reduce the power consumption of the terminal. All the systems used by this method have 21 set-up channels designated as signal channels among the 333 channels (if the operating bandwidth is 10 MHz) when the subscriber operates the mobile terminal. Scan) in order. At this time, select the channel with the greatest propagation force among 21 setting channels and tune to the channel frequency. Since all of the neighboring base stations are assigned different setting channels, synchronous and fixed to the strongest setting channel means that the terminal selects the nearest base station.

This state is not in a call but can answer any time by calling itself and is ready to send a signal immediately when a subscriber wants to make a call. It is ready.

Therefore, if the above state continues, there is a problem of continuously consuming the power of the terminal despite the non-call state. In addition, in the conventional system, when the automatic location registration (AR) is performed, the power consumption becomes much higher, and thus the inconvenience of shortening the replacement time of the rechargeable battery of the terminal is included.

The present invention has been made to solve the problems of the prior art operating as described above, the main purpose is to minimize the power consumption of the terminal by not performing the frequency tuning of the terminal during the non-call time to minimize the use time of the terminal To provide a way to maximize.

1 is a power control method of a terminal according to an embodiment of the present invention.

Indicating flow chart,

2 is a channel configuration diagram of a protocol (PROTOCOL) applied to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be more apparent from the following detailed description based on the accompanying drawings in order to achieve the above object.

In a method of controlling power of a terminal in a wireless communication system according to an embodiment of the present invention, a first step of continuously searching for a preamble signal using a minimum power of a mobile terminal, and determining a preamble included in the mobile terminal A second step of detecting a preamble signal received by the device; a third step of mutually comparing an IDENTIFICATION CODE in the preamble signal with an identification code of the identification code part; ignoring the received signal if different from the comparison result; In step 4, when the terminal switches from the STANDBY MODE to the ACTIVE MODE, when a preamble signal is detected, the terminal transmits a CONNECT REQUEST signal to the base station. Registering in the HOME LOCATION REGISTER (HLR), and in the fifth step of receiving an acknowledgment signal (ACKNOWLEDGE) for the connection request signal; The terminal is configured to sequentially perform a seventh step of receiving a forward channel and attempting a call according to a general procedure.

In addition, the preamble signal is located at the front end of the pilot channel is preferably configured not to perform a search for the pilot channel when the non-call, the identification code is preferably made of EPROM (ERASABLE AND PROGRAMMABLE READ ONLY MEMORY).

And the terminal receiving the call signal is preferably configured to automatically switch to sleep mode after the call.

The invention can be variously modified and can take various forms and only the specific examples thereof are described in the following detailed description of the invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the following description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood that.

Referring to the operation of the present invention configured as described above are as follows.

1 is a flowchart illustrating a call control method for power control of a terminal.

The present invention can be applied to a wireless communication system (WIRELESS COMMUNICATION SYSTEM), the embodiment configuration may be changed somewhat in the application, but the main content of the invention does not change.

First, the public inputs the terminal number of the subscriber in order to talk to the subscriber. It analyzes the input terminal number, and transmits a call signal to the subscriber's terminal through the user's information (USER IDENTIFICATION) which is already entered or newly input (BROADCAST). This call signal includes a preamble signal (PREAMBLE SIGNAL). On the other hand, the mobile station does not know the location of the terminal while the subscriber is not talking. It merely searches for the preamble signal of the terminal continuously (S2).

The subscriber's terminal receives the call signal, and the preamble signal is detected by the preamble determiner (PREAMBLE DETECTOR) in the terminal (S4). The sensed preamble signal includes an IDENTIFICATION CODE (ID CODE), so that the terminal can identify its own call with respect to the received call.

On the other hand, inside the terminal, an identification code unique to the terminal is stored in an identification code section consisting of EPROM (ERASABLE AND PROGRAMMABLE READ ONLY MEMORY). Therefore, when the preamble signal is received, the signal processing unit (amplification, filtering, etc.) proceeds to the code comparison unit to compare the identification code (ID CODE). The code comparison unit compares the identification code of the terminal stored in the EPROM with the identification code included in the preamble signal and ignores the preamble signal if they do not match.

When the above identification codes match, the call signal is recognized as a call received by its own terminal (S6) and the terminal is switched from the sleep mode (STANDBY MODE) to the active mode (ACTIVE MODE) (S8). ), The terminal sends a CONNECT REQUEST to the base station (S10). Then, the connection request signal is transmitted to the switching station (MOBILE SWITCHING CENTER: MSC) via the base station, and the switching center receives the current terminal location and all the information thereof, and transmits an acknowledgment signal (ACKNOWLEDGE) to the terminal (S12). ), And then call. In addition, since the preamble signal is located in front of the pilot channel, the terminal does not search the pilot channel during non-calling, and thus it is possible to store a large amount of power consumed by the search. The location of the preamble signal is shown in FIG. 2.

When the preamble signal is detected, the connection request signal (CONNECT REQUEST) is transmitted to the base station to register the location and information of the terminal in the home location register (HOME LOCATION REGISTER: HLR). Accordingly, the terminal switched to the active mode searches for a pilot channel (S14), and attempts a call in synchronization with the PN sequence (PSEUDO RANDOM SEQUENCE) of the strongest pilot channel among them (S16).

Then, to inform the subscriber of the reception of the call signal, the power is turned on and the terminal flashes or vibrates. Such blinking or vibrating, other means for informing the subscriber can be used selectively, and the method can also be used by various means.

The activated terminal operates in the same manner as the operation of the general terminal, so that the terminal attempts to call according to the general procedure, and the attempt is made a predetermined number of times for a predetermined time. If there is no call after such an attempt, it is recognized as the incapable state and informs the subscriber of the inability to receive.

Therefore, the terminal receiving the call signal is automatically switched to the sleep mode after the call is minimized to minimize the power of the continuous terminal.

According to the present invention, the terminal synchronizes with the pilot channel irrespective of the call connection and consumes no unnecessary power, and is activated only when attempting to connect the call, thereby minimizing the power consumption of the terminal, thus providing maximization of the terminal usage time. It is obvious that this is a very advantageous invention.

Claims (4)

A first step of the mobile terminal continuously searching for a preamble signal using a minimum power; A second step of detecting, by the preamble discriminator included in the mobile terminal, the received preamble signal; A third step of comparing IDENTIFICATION CODE in the preamble signal with an identification code of the identification code part; A fourth step in which the received signal is ignored if the comparison result is different and the terminal is switched from the sleep mode to the active mode if it is the same; A fifth step of, when the preamble signal is detected, sending a connection request signal to the base station to register the location and information of the terminal to the home location register (HLR); A sixth step of receiving a response signal (ACKNOWLEDGE) to the connection request signal; And The terminal confirming the response signal is a power control method of a terminal in a wireless communication system, characterized in that the seventh step of receiving a forward channel to attempt a call in accordance with a general procedure sequentially. The method according to claim 1, The preamble signal is located at the front end of the pilot channel power control method of the terminal in the wireless communication system, characterized in that does not perform the search for the pilot channel. The method according to claim 1, The identification code unit is a power control method of a terminal in a wireless communication system, characterized in that consisting of EPROM (ERASABLE AND PROGRAMMABLE READ ONLY MEMORY). The method according to claim 1, The terminal for receiving the call signal is a power control method of the terminal in the wireless communication system, characterized in that automatically switch to sleep mode after the call.