KR20060035313A - System and method of power saving for portable subscriber station with power saving function - Google Patents

Abstract

The present invention relates to a portable terminal system having a power saving function and a power saving method.

The present invention provides a portable Internet service to a user, monitors the transmission and reception of data for the portable Internet service to determine whether to change the state to the power saving mode, and the host for controlling the power supply for power saving; And a host connected to a PCMCIA interface to determine whether a sleep mode can be changed for power saving, and when a sleep mode can be changed. And a PCMCIA adapter for notifying the host of the change of the sleep mode state after performing the state change to the sleep mode for the power saving by receiving the sleep mode change permission.

According to the present invention, the portable terminal can efficiently switch from the sleep mode in the sleep state to the sleep mode by the interaction between the host operating system and the PCMCIA adapter.

PCMCIA, Sleep, Sleep, Awake Mode

Description

System and method of power saving for portable subscriber station with power saving function

1 is a block diagram illustrating a structure of a portable terminal system having a power saving function according to an exemplary embodiment of the present invention.

FIG. 2 is a block diagram illustrating a structure of the power saving controller of FIG. 1.

3 is a flowchart illustrating a process of transitioning from an awake mode to a sleep mode for power saving of a portable terminal system having a power saving function according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating a first embodiment of a process of switching from a sleep mode to an awake mode for power saving of a portable terminal system having a power saving function according to an embodiment of the present invention.

5 is a flowchart illustrating a second embodiment of a process of switching from a sleep mode to an awake mode for power saving of a portable terminal system having a power saving function according to an embodiment of the present invention.

The present invention relates to a portable terminal system having a power saving function and a power saving method, and more particularly, to a portable terminal system and a power saving method having a power saving function for extending the power life of a terminal in a portable internet system.

Portable Internet Service is faster than IMT-2000 (International Mobile Telecommunication-2000) service transmission speed, and it is to provide indoor wired high-speed Internet and wireless LAN (Local Area Network) service at low price even in outdoor environment. It is a target service.

In this portable Internet standard, a portable subscriber station (PSS) is a component of a network and is registered with a radio access station (RAS) to provide a portable internet service to a subscriber.

The terminal system in the portable Internet service may have various forms such as a personal digital assistant (PDA), a smartphone, a laptop, and the like, and the PCMCIA interface is an optimal peripheral interface that can be used in a laptop and other personal computers. Can be configured as a notebook-like host through a PCMCIA adapter in the form of a Network Interface Card (NIC) and a PCMCIA slot.

The 2.3 GHz portable Internet service standard does not define a specific operation method for power saving of the terminal, but only states for reducing power consumption.

Therefore, how to implement the power saving device in the terminal using the state defined in the specification may vary depending on how the terminal system is implemented.

In particular, when the terminal system is implemented in the form of a host such as a laptop and a PCMCIA adapter that matches the PCMCIA adapter, the power of the PCMCIA adapter is supplied by the host, and thus, power saving between the host operating system and the adapter in charge of power management of the host should be performed. The problem is that you have to define the interaction to do.

In order to solve the above problems, the present invention provides a sleep mode in the power saving state in the awake mode (Awake Mode) by the interaction between the host operating system and the PCMCIA adapter to extend the power life of the terminal in the portable terminal system SUMMARY OF THE INVENTION An object of the present invention is to provide a portable terminal system and a power saving method having a power saving function for enabling power saving by efficiently switching a sleep mode.

A portable terminal system having a power saving function according to one aspect of the present invention,

In a portable terminal system that provides a portable Internet service by performing wireless communication with a wireless communication base station, the portable terminal system provides a portable Internet service to a user, and monitors data transmission / reception for the portable Internet service to determine whether to change the power saving mode. A host controlling a power supply for power saving; And a host connected to a PCMCIA interface to receive power from the host, perform data transmission / reception between the host and a wireless communication base station for a portable Internet service, and request power saving from the host. In accordance with the present invention, it is determined whether the sleep mode change for power saving is possible, and when the sleep mode change is possible, the sleep mode change is performed after receiving the sleep mode change permission from the base station and changing the state to the sleep mode for power saving. And a PCMCIA adapter for notifying the host, wherein the host performs power control supplied to the PCMCIA adapter according to a sleep mode state change notification transmitted from the PCMCIA adapter.

In particular, the PCMCIA adapter is connected to the host and the PCMCIA matching unit for the portable Internet system to match the PCMCIA interface to conform to the PCMCIA standard, the PCMCIA matching unit is connected to the PCMCIA matching unit control and traffic data of the portable terminal system A medium access control (MAC) processor for performing a media access control function, and a channel coding / decoding and modulation to suit a PDU (protocol data unit) transmitted and received by the MAC processor in a wireless channel environment. A physical layer unit for demodulating, an RF unit for modulating a signal transmitted / received from the physical layer unit into a radio frequency (Radio Frequency) signal or wirelessly outputting the signal, or receiving and demodulating a radio RF signal and transmitting the demodulated signal to the physical layer unit It is determined whether the sleep mode of the PCMCIA adapter can be changed according to a request for a state change from the host, and the sleep is performed. Storing the state value change request for changing the draw, and includes a sleep control unit for performing a timer operation based on the sleep parameters in power save mode provided from the base station to determine whether to change the state of the PCMCIA adapter.

The power saving control unit may include: a power saving request register configured to write a power saving mode value required for the host to change a power saving state of the PCMCIA adapter through the PCMCIA matching unit; A sleep state register written by the MAC processor to indicate a state of the PCMCIA adapter; A register for storing a parameter related to a sleep mode of a power saving state of the portable terminal system; A watchdog timer for recording an elapsed time since the last transmission / reception data of the portable terminal system is transmitted through the PCMCIA matching unit; And a sleep timer for indicating a time to wake up in an awake mode on the basis of the time when the portable terminal system enters the sleep mode.

The host and the PCMCIA adapter may perform message transfer using a hardware interrupt signal and a register value stored in the power saving controller.

The power saving mode of the portable terminal system is characterized by power saving by minimizing power consumption of the MAC processing unit, physical layer unit, and RF unit.

The host may include a PCMCIA host controller connected to the PCMCIA adapter and a PCMCIA interface to perform message transmission; And a PCMCIA control unit for controlling the PCMCIA host controller.

A power saving method of a portable terminal system having a power saving function according to one feature of the present invention,

A mobile device having a power saving function including a host for providing a portable Internet service to a user through wireless communication, and a PCMCIA adapter connected to the host and a PCMCIA interface to receive power, and providing a wireless communication function of the mobile terminal. A power saving method of a terminal system, the method comprising: (a) monitoring, by a host, whether to transmit or receive wireless data, determining a state change, and requesting the PCMCIA adapter to change a state to a power saving mode for power saving; (b) The PCMCIA adapter determines whether a sleep mode change for power saving is possible according to the state change request to the power saving mode, and if a sleep mode change is possible, sends a sleep request message for power saving to a base station providing wireless communication. Receiving a response message by transmitting; (c) the PCMCIA adapter analyzes the response message received from the base station and, if accepted for the sleep request, extracts and stores the sleep parameters included in the response message, switches to sleep mode, and sleeps to the host. Informing a mode switch; And (d) performing a power saving function by controlling the power supplied to the PCMCIA adapter according to the sleep mode change notification delivered by the PCMCIA adapter.

At this time, in the step (b), it is possible to determine whether the sleep mode change for power saving is possible, when the elapsed time from the last time the data is transmitted and received through the PCMCIA interface has elapsed a predetermined time can be changed to the sleep mode. It is characterized by judging.

And in step (b), if it is impossible to change the sleep mode for power saving, the PCMCIA adapter rejects the state change request to the power saving mode to the host, and operates in an awake mode in which normal operation is performed. It includes.

In step (c), when the response message from the base station rejects the transition to the power saving mode, the PCMCIA adapter rejects the request for the state change to the power saving mode to the host, and performs normal operation. Operating in the wake mode.

The sleep parameter of the response message received from the base station includes sleep interval information for switching from sleep mode to awake mode, and time information from entering the power saving mode after receiving the response message from the base station. .

And after step (d), transitioning to the awake mode in which the portable terminal system operates normally after the sleep interval set by the sleep parameter included in the response message received from the base station expires; Determining whether there is data received by the portable terminal system in the awake mode; And when there is no data received by the portable terminal system, switching to the sleep mode using the sleep parameter included in the response message received from the base station.

In addition, after the step (d), in a state in which the sleep interval set by the sleep parameter included in the response message received from the base station has not expired, the system enters the awake mode for data transmission from the mobile terminal system operating system. Receiving, by the PCMCIA adapter, a switch request; And canceling the power saving state of the PCMCIA adapter in the sleep mode, switching to the awake mode, and performing data transmission according to the received switchover request to the awake mode.

The sleep mode switch request or awake mode switch request between the operating system of the portable terminal system and the host and the PCMCIA adapter is characterized by using a hardware interrupt signal and a value written to a register included in the PCMCIA adapter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the accompanying drawings, parts irrelevant to the description of the present invention are omitted in order to clearly describe the present invention, and the same or similar parts are denoted by the same reference numerals.

1 is a block diagram illustrating a structure of a portable terminal system according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a portable terminal system for using a portable Internet service includes a host 110 and a PCMCIA adapter 120.

The host 110 includes a PCMCIA control unit 111, and the PCMCIA adapter 120 includes a PCMCIA matching unit 121, a medium access control (MAC) processing unit 122, a physical layer unit 123, and a radio frequency (RF) The unit 124 and the power saving control unit 200 is included.

The PCMCIA control unit 111 of the host 110 includes a PCMCIA host controller, which is hardware, and driver software for controlling the PCMCIA host controller, and matches the PCMCIA matching unit 121 of the PCMCIA adapter 120.

The PCMCIA matching unit 121 of the PCMCIA adapter 120 satisfies the PCMCIA standard and enables the host 110 to recognize the PCMCIA adapter 120 as a PCMCIA I / O (Input / Output) device. Match.

In addition, the PCMCIA matching unit 121 decodes the address applied through the PCMCIA interface to enable the host 110 to read and write data to the MAC processing unit 122 or to read and write data to the power saving control unit 200.

The PCMCIA matching unit 121 internally has a state register to indicate an interrupt cause applied to the PCMCIA control unit 111 of the host 110 by a STSCHG # (Status Change) signal, which is one of PCMCIA interface signals. Can be.

The MAC processing unit 122 matches the PCMCIA matching unit 121 to exchange control and traffic data with the host 110 and performs key media access control functions such as system access, bandwidth allocation, connection setting, and connection management. .

In addition, the physical layer unit 123 performs channel coding / decoding and modulation / demodulation in accordance with the MAC processing unit 122 so that the PDU (Protocol Data Unit) transmitted and received by the MAC processing unit 122 is suitable for a wireless channel environment. The RF unit 124 modulates a signal transmitted from the physical layer unit 123 into a wireless RF signal and transmits the signal to the base station, or receives a wireless RF signal received from the base station to demodulate the RF signal and then physical layer unit 123. To pass.

The power saving control unit 200 is a place for performing power saving control of the PCMCIA adapter 120 and includes a structure as follows.

2 is a block diagram illustrating a structure of the power saving control unit 200 of FIG. 1.

Referring to FIG. 2, the power saving control unit 200 is divided into a register unit 210 and a timer unit 220, and the register unit 210 includes a power saving request register 211, a power saving state register 212, and other registers 213. The timer unit 220 includes a watchdog timer 221 and a sleep timer 222.

The power saving request register 211 writes a power saving mode value required when the PCMCIA control unit 111 wants to change the power saving state of the PCMCIA adapter 120 via the PCMCIA matching unit 121, and the power saving state register 212 writes the value. Stores state information written by the MAC processing unit 123 to indicate the state of the PCMCIA adapter 120.

The other register 213 stores parameters related to the sleep mode.

In addition, the watchdog timer 221 of the timer unit 220 records the elapsed time from the time when the last transmission / reception data came through the PCMCIA matching unit 121, and the sleep timer 222 is based on the start time of the sleep mode. It tells you the time to wake up in awake mode.

A power saving method of a portable terminal system according to an embodiment of the present invention including the above structure is as follows.

3 is a flowchart illustrating a process of transitioning from an awake mode to a sleep mode for power saving of a portable terminal system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the process of transitioning from the awake mode to the sleep mode in order to save power in the portable terminal system includes the operating system 300 of the host 110, the PCMCIA control unit 111, the PCMCIA matching unit 121, and the power saving control unit ( 200, the MAC processing unit 122, the physical layer unit 123, and the RF unit 124 may be represented by a signal flow diagram.

First, in order to transition from the awake mode to the sleep mode, the operating system 300 requests the power reduction to enter the sleep mode by reducing the power to the PCMCIA control unit 111 (S301).

The PCMCIA control unit 111 receiving the power reduction request writes a value for requesting the PCMCIA adapter 120 to enter the sleep mode through the PCMCIA matching unit 121 to the power saving request register 211 of the power saving control unit 200 (S302). , S303).

The power saving control unit 200 determines whether the time Tw of the watchdog timer 221 which records the elapsed time from the time point at which the last data was transmitted and received through the PCMCIA interface has elapsed a predetermined time t (S304).

At this time, the watchdog timer 221 is a timer that is reset to '0' every time data is transmitted and received on the PCMCIA interface, and when the time t has not elapsed, the watchdog timer 221 determines that the probability of data transmission and reception is high.

Therefore, the power saving control unit 200 displays awake in the power saving state register in order to remain in the awake mode, and informs the PCMCIA control unit 111 through the PCMCIA matching unit 121 (S310 and S311).

At this time, the PCMCIA matching unit 121 transmits a STSCHG # (Status Change) signal, which is a PCMCIA interrupt signal for indicating a state change, to the PCMCIA control unit 111 in response to writing of the power saving state register 222 of the power saving control unit 200. Inform by

Then, the PCMCIA control unit 111 reads the power saving state register 212 of the power saving control unit 200 (S312), confirms that the awake mode, and informs the operating system 300 of the rejection of the power reduction request (S313). .

On the other hand, if the watchdog timer 221 is greater than the predetermined time t in step S304, since there is less probability of data transmission and reception for a while, an attempt is made to switch to the sleep mode.

To this end, the power saving control unit 200 applies an interrupt signal IRQ to the MAC processing unit 122 (S305), and the MAC processing unit 122 receiving the interrupt signal reads the power saving request register 211 of the power saving control unit 200. After determining that the power saving request is made (S306), a sleep request message (SLP_REQ; Sleep Request) for sending to a base station (RAS) is transmitted (S307).

At this time, the sleep request message is transmitted to the base station by the RF unit 124 as a radio signal through the physical layer unit 123.

When the RF unit 124 receives the response (SLP_RSP) for the sleep request message from the base station as a radio signal and transmits the received signal to the MAC processing unit 122 through the physical layer unit 123 (S308), the MAC processing unit 122 It is determined whether the sleep request is granted, and if not, the procedure for rejecting the power reduction request is performed as in steps S310 to S313.

In addition, if permission is received from the base station for the sleep request, the MAC processing unit 122 recognizes that its state is changed from the awake mode to the sleep mode (S314), and the sleep request message from the base station received in step S308 After analyzing the response message to extract the parameters for the sleep mode, and transfers them to the power saving control unit 200, calculates the sleep interval length, which is the time in the sleep mode to wake up again in the awake mode when the sleep period is expired When the sleep timer is set and the sleep mode is entered, a value corresponding to the sleep mode is written to the power saving state register 212 of the power saving control unit 200 (S315).

The power saving control unit 200 puts the MAC processing unit 122, the physical layer unit 123, and the RF unit 124 into a power saving state according to the sleep mode value written by the MAC processing unit 122 in the power saving state register 212 (S321). ~ S323).

Specifically, the power supply controller 200 may be implemented by stopping a supply clock or reducing a clock speed, shutting down a power supply, and the like. The power saving control unit 200 may require continuous communication with a host to wake up from a sleep mode. And PCMCIA matching unit 121 does not enter the sleep mode.

In addition, the power saving control unit 200 indicates that the PCMCIA adapter 120 has entered the sleep mode to indicate the sleep mode in the status register in the PCMCIA matching unit 121 (S316).

The PCMCIA matching unit 121 detects that the power saving control unit 200 writes the sleep mode to the status register, allocates an interrupt signal STSCHG # to notify the PCMCIA control unit 111 of the status register change (S317), Upon receiving the interrupt, the PCMCIA control unit 111 reads the status register of the PCMCIA 121 (S318), and recognizes that the PCMCIA 121 has changed to the sleep mode (S319).

The operating system 300 of the host reduces the power supplied to the PCMCIA adapter 120 according to the acceptance message of step S320.

As described above, the method for converting the mobile terminal system into the awake mode back to the awake mode according to the embodiment of the present invention is largely divided into two methods.

Firstly, when there is data transmitted to the mobile terminal system, the mobile terminal system switches to the awake mode when the sleep interval expires to check whether there is any data transmitted to the mobile terminal system even during the sleep mode. Receives a traffic indication message (TRF-IND) to check whether there is data to be transmitted to it.

In this case, the time for waking up from the sleep mode and receiving the traffic indication message transmitted by the base station is called a listening interval, and after receiving the message, the portable terminal may return to the awake mode or the sleep mode according to the content of the message.

Secondly, when the mobile terminal system switches from the sleep mode to the awake mode, the mobile terminal system transmits data by the user, and the mobile terminal system immediately switches to the awake mode to perform normal operation. do.

The method of switching from the sleep mode to the awake mode will now be described in detail.

4 is a flowchart illustrating a first embodiment of a process of switching from a sleep mode to an awake mode for power saving of a portable terminal system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, when there is data transmitted from the base station in the listening section after the sleep period has expired, the process is switched to the awake mode. First, when the sleep timer of the power saving control unit 200 expires (S401), In order to receive the traffic indication message from the base station, the terminal switches to the awake mode in a normal operation state.

To switch to the awake mode, the power saving control unit 200 writes an awake indication in the status register of the PCMCIA matching unit 121 (S402), and the power saving control unit 200 writes an awake indication in the status register. The 121 recognizes and transmits an interrupt signal for state conversion to the PCMCIA control unit 111 (S403).

Upon receiving the interrupt signal, the PCMCIA control unit 111 reads the status register of the PCMCIA matching unit 121 (S404), detects that the sleep mode is changed to the awake mode (S405), and requests an increase in power to the operating system 300 (S405). S406).

When the operating system 300 increases the power, the PCMCIA control unit 111 receives a confirmation message for this (S407) and the PCMCIA adapter to the power saving request register 211 of the power saving control unit 200 through the PCMCIA matching unit 121. In operation S408, the value 120 requests to enter the awake mode.

Then, the address register is decoded by the PCMCIA matching unit 121 (S409), the value is written to the power saving request register 211 of the power saving control unit 200, and the power saving control unit 200 is the RF unit 124, physical Power saving is canceled for the layer unit 123 and the MAC processing unit 122 (S410 to S412).

Reduction of power saving is specifically possible by reapplying the supply clock or restoring the clock speed, reapplying the power, and the like, and may be variously applied according to embodiments.

In addition, the power saving control unit 200 applies an interrupt (IRQ) to the MAC processing unit 122 which normally starts operation (S413), and the MAC processing unit 122 reads the power saving request register 211 of the power saving control unit 200. In operation S414, the sleep timer 222 is checked (S415), the sleep parameter is read (S416), and the sleep mode is changed to the awake mode (S417).

At this time, the MAC processing unit 220 checks the value of the sleep timer 222 of the power saving control unit 200 (S415), in this case, since the sleep timer 222 has expired in step S401, the MAC processing unit 122 sleeps. It can be seen that the mobile terminal system wakes up in the awake mode after entering the mode, and the process transitions back to the sleep mode or the awake mode according to the base station message after the sleep period has expired.

Therefore, the MAC processing unit 122 reads the listening period length and other sleep mode related parameters stored in the power saving control unit 200 again (S416), changes the internal state to the awake mode (S417), and traffic during the listening period. Wait for the instruction message.

The MAC processing unit 122 determines whether to change to the awake mode or go back to the sleep mode through the reception of the traffic indication message, the contents of the received traffic indication message, and the frame number check (S418).

As a result of the determination in step S418, when it is necessary to switch to the awake mode, the MAC processing unit 122 clears the sleep-related parameters in the power saving control unit 200, releases the sleep timer 222, and then saves the power saving state register 212. ), A value corresponding to the awake mode is written (S419).

In addition, the power saving control unit 200 indicates the awake mode in the status register of the PCMCIA matching unit 121 (S420), and the PCMCIA matching unit 121 that detects that the power saving control unit 200 writes to the status register is displayed. The interrupt STSCHG # is applied to the PCMCIA control unit 111 to indicate that the state has changed (S421).

The PCMCIA control unit 111 reads the status register by the interrupt signal from the PCMCIA matching unit 121 (S422), and knows that the current PCMCIA adapter 120 is in the awake mode, and thus successfully enters the awake mode from the sleep mode. You can see that you have switched.

In addition, when the MAC processing unit 122 determines that the sleep mode should be returned to the sleep mode again in step S418, the MAC processing unit 122 switches the internal state to the sleep mode (S423), and the sleep read by the power saving control unit 200. After re-calculating the sleep interval length from the mode related parameter, the sleep timer 222 is set again, and a value corresponding to the sleep mode is written to the power saving state register 212 at the end of the listening interval (S424).

The power saving control unit 200 makes the MAC processing unit 122, the physical layer unit 123, and the RF unit 124 into a power saving state by the sleep mode value written in the power saving state register 212 (S430 to S432), and the PCMCIA adapter. In order to notify the host that 120 has entered the power saving state, it writes the sleep mode to the status register in the PCMCIA matching unit 121 (S425).

The PCMCIA matching unit 121 detects a write operation to the status register, sends an interrupt notifying the PCMCIA control unit 111 of the status change (S426), and the PCMCIA control unit 111 reads the status register (S427) and displays the current PCMCIA adapter. After reading that the state is in the sleep mode (S428), the power reduction request is made to the operating system 300.

In addition to the method of waking from the sleep mode to the awake mode as described above, the switch to the awake mode due to the use of the user's portable terminal system is as follows.

5 is a flowchart illustrating a second embodiment of a process of switching from a sleep mode to an awake mode for power saving of a portable terminal system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, when the user enters the awake mode due to the use of the mobile terminal system, when the user transmits data to the PCMCIA adapter 120, the operating system 300 of the host in charge of power management of the host is included. ) Makes a power increase request to the PCMCIA control unit 111 to return the power to a normal state (S501).

Accordingly, the PCMCIA control unit 111 requests the PCMCIA matching unit 121 to write a value for requesting the power saving request register 211 of the power saving control unit 200 to enter the awake mode (S502), and the PCMCIA matching unit awake The awake value is written to the power saving request register 211 by decoding to write the mode value (S503).

The power saving control unit 200 clears the sleep related parameters, releases the sleep timer 222 (S504), and releases the power saving states of the RF unit 124, the physical layer unit 123, and the MAC processing unit 122 ( S506-S507).

In addition, the power saving control unit 200 applies an interrupt to the MAC processing unit 122 which is normally operated after the power saving is released (S508), and the MAC processing unit 122 that receives the interrupt stores the power saving request register 211 of the power saving control unit 200. Read (S509), determine that the request to transition to the awake mode, and checks the sleep timer (222) (S510), because the state has not yet expired to make the internal state to the awake mode (S511), the power saving control unit 200 In step S511, the sleep timer 222 is released after clearing the sleep related parameter.

The power saving control unit 200 indicates that the awake mode is in the status register of the PCMCIA matching unit 121 (S512), and the PCMCIA matching unit 121 detects that the power saving control unit 200 has written to the status register and hosts the host. Sending an interrupt indicating that the state has been changed (S513), the PCMCIA control unit 111 reads the status register (S514), after confirming that the change from the sleep mode to the awake mode (S515), the power increase request to the operating system 300 (S516).

The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the appended claims or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, the mobile terminal system and the power saving method having a power saving function according to the present invention is a sleep state in which the mobile terminal sleeps in the awake mode (Awake Mode) by the interaction between the host operating system and the PCMCIA adapter There is an effect that can efficiently switch the mode (Sleep Mode).

Claims (14)

A mobile terminal system for providing a mobile Internet service by performing wireless communication with a wireless communication base station, A host for providing a portable Internet service to a user, monitoring data transmission / reception for the portable Internet service, determining whether to change a state into a power saving mode, and controlling power supply for power saving; And Connected to the host through a Personal Computer Memory Card International Association (PCMCIA) interface, receiving power from the host, performing data transmission and reception between the host and a wireless communication base station for a mobile Internet service, and receiving a power saving request from the host. Accordingly, it is determined whether the sleep mode change for power saving is possible, and when the sleep mode change is possible, after changing the state to the sleep mode for power saving after receiving the sleep mode change permission from the base station, the sleep mode state change is performed. A PCMCIA adapter for informing the host, And the host performs power control to the PCMCIA adapter according to a sleep mode state change notification transmitted from the PCMCIA adapter. The method of claim 1, The PCMCIA adapter, A PCMCIA matching unit connected to the host to perform matching with the PCMCIA interface so that the portable Internet system conforms to the PCMCIA standard; A medium access control (MAC) processing unit connected to the PCMCIA matching unit to exchange control and traffic data of the portable terminal system and perform a media access control function; A physical layer unit connected to the MAC processor for channel coding / decoding and modulating / demodulating a PDU (Protocol Data Unit) transmitted and received by the MAC processor in a wireless channel environment, An RF unit for modulating a signal transmitted and received from the physical layer unit into a radio frequency (Radio Frequency) signal and wirelessly outputting the signal, or receiving and demodulating the radio RF signal, and transmitting the demodulated signal to the physical layer unit; It is determined whether the sleep mode of the PCMCIA adapter can be changed according to a request for a state change from the host, and a state change request value is stored to change to a sleep mode, and a timer is performed by a sleep parameter in a power saving mode provided from the base station. Power saving control unit to determine whether to change the state of the PCMCIA adapter by performing an operation Portable terminal system having a power saving function comprising a. The method of claim 2, The power saving control unit, A power saving request register for writing a power saving mode value required for the host to change the power saving state of the PCMCIA adapter via the PCMCIA matching unit; A sleep state register written by the MAC processor to indicate a state of the PCMCIA adapter; A register for storing a parameter related to a sleep mode of a power saving state of the portable terminal system; A watchdog timer for recording an elapsed time since the last transmission / reception data of the portable terminal system is transmitted through the PCMCIA matching unit; And Sleep timer for informing the time to wake up in the awake mode on the basis of when the mobile terminal system enters the sleep mode Portable terminal system having a power saving function further comprising. The method of claim 3, wherein And the host and the PCMCIA adapter perform message transfer using a hardware interrupt signal and a register value stored in the power saving controller. The method of claim 2, The power saving mode of the portable terminal system, A portable terminal system having a power saving function, characterized in that power saving by minimizing power consumption of the MAC processing unit, physical layer unit, and RF unit. The method of claim 1, The host, A PCMCIA host controller connected to the PCMCIA adapter and a PCMCIA interface to perform message transmission; And PCMCIA control unit for controlling the PCMCIA host controller Portable terminal system having a power saving function comprising a. A portable terminal having a power saving function including a host for providing a portable Internet service to a user through wireless communication, and a PCMCIA adapter connected to the host via a PCMCIA interface to receive power, and providing a wireless communication function of the portable terminal. In the power saving method of the system, (a) monitoring, by the host, whether to transmit or receive wireless data to determine a state change, and requesting the PCMCIA adapter to change the state to a power saving mode to save power; (b) The PCMCIA adapter determines whether a sleep mode change for power saving is possible according to the state change request to the power saving mode, and if a sleep mode change is possible, sends a sleep request message for power saving to a base station providing wireless communication. Receiving a response message by transmitting; (c) when the PCMCIA adapter analyzes the response message received from the base station, and if the sleep request is accepted, extracts and stores the sleep parameter included in the response message, switches to the sleep mode, and sleeps to the host. Informing a mode switch; And (d) controlling the power supplied to the PCMCIA adapter according to the sleep mode change notification delivered by the PCMCIA adapter to perform a power saving function; Power saving method of a portable terminal system having a power saving function comprising a. The method of claim 7, wherein In step (b), Determining whether sleep mode change for power saving is possible The power saving method of the mobile terminal system having a power saving function, characterized in that it is determined that the change to the sleep mode when the elapsed time from the last time when the data is transmitted and received through the PCMCIA interface has passed a predetermined time. The method of claim 8, In step (b), If it is impossible to change the sleep mode for power saving, the PCMCIA adapter rejects the state change request to the power saving mode to the host and operates in an awake mode in which normal operation is performed. Power saving method of terminal system. The method of claim 7, wherein In the step (c), If the response message from the base station refuses to switch to the power saving mode, the PCMCIA adapter rejects the request for the state change to the power saving mode to the host, and operates in an awake mode in which normal operation is performed. A power saving method for a portable terminal system having a power saving function. The method of claim 7, wherein The sleep parameter of the response message received from the base station includes sleep interval information for switching from the sleep mode to the awake mode and time information from the base station to the power saving mode after receiving the response message from the base station. A power saving method of a portable terminal system having a function. The method of claim 7, wherein After step (d), Switching to an awake mode in which the portable terminal system operates normally when the sleep interval set by the sleep parameter included in the response message received from the base station expires; Determining whether there is data received by the portable terminal system in the awake mode; And If there is no data received by the portable terminal system, switching to the sleep mode using the sleep parameter included in the response message received from the base station; A power saving method of a portable terminal system having a power saving function further comprising. The method of claim 7, wherein After step (d), Receiving, by the PCMCIA adapter, a request to switch to an awake mode for data transmission from the portable terminal system operating system in a state in which the sleep interval set by the sleep parameter included in the response message received from the base station has not expired; ; And In response to the request for switching to the awake mode, canceling the power saving state of the PCMCIA adapter in the sleep mode and switching to the awake mode to perform data transmission A power saving method of a portable terminal system having a power saving function further comprising. The method according to any one of claims 7 to 13, The power saving mode switching request or the awake mode switching request between the operating system of the portable terminal system and the host and the PCMCIA adapter has a power saving function using a hardware interrupt signal and a value written to a register included in the PCMCIA adapter. How to save power in a mobile terminal system.

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