WO2010051728A1

WO2010051728A1 - Standby power consumption reducing method for radio frequency subscriber identity module card using sequence triggering

Info

Publication number: WO2010051728A1
Application number: PCT/CN2009/074485
Authority: WO
Inventors: 孙迎彤; 梁建华
Original assignee: 国民技术股份有限公司
Priority date: 2008-11-06
Filing date: 2009-10-16
Publication date: 2010-05-14
Also published as: CN101742619A

Abstract

A standby power consumption reducing method for Radio Frequency (RF) Subscriber Identity Module (SIM) card using sequence triggering is disclosed. The method includes the following steps: the main control module in the RF SIM card is usually in a low-power-consuming sleeping mode; when the RF module in the RF SIM card detects a predetermined sequence signal from the RF data terminal, the main control module in sleeping mode is aroused, and the main control module exchanges data with a RF data terminal through the RF module; the main control module returns to the sleeping mode upon finishing of data exchange and waits for the next triggering. Since there is no radio frequency card reader around the user at the most of time, the main control module will not be aroused and will be in sleeping mode over a long period of time if the RF module in the RF SIM card does not detect the predetermined sequence signal, thus the power consumption of the radio frequency SIM card can be effectively reduced.

Description

Method for reducing standby power consumption of radio frequency S IM card by using sequence triggering

The present invention relates to a record carrier for use with a machine and having semiconductor circuit components, and more particularly to a method of reducing standby power consumption of a radio frequency SIM card. Background technique

In daily life, there are many places where card swipe operations are required, such as access control, small payments for public transportation and catering, and so on. The traditional method is to hold one to several RF cards per person for card swipe operations in different situations. With the advancement and development of technology, mobile phones (hereinafter referred to as "mobile phones") have become more and more popular, especially in cities, and basically one mobile phone per person has been achieved. Therefore, the use of mobile phones for "swipe" operations without the need to carry too many cards naturally becomes a trend. With the development of technology, various intelligent circuit modules can be added to the S IM (User Identification and Identification Module) card body in the mobile phone by various methods to form a radio frequency SIM card, so that in addition to the basic S IM card function, It can also have the function of transmitting and receiving data by radio frequency, so that the function of the ordinary radio frequency card can be realized. The radio frequency SIM card of the present invention is a smart card having these functions.

The radio frequency S IM card according to the present invention includes a radio frequency transceiver circuit and a radio frequency transceiver antenna in addition to the ordinary S IM card function circuit. The entire RF S IM card relies on mobile phone power. Mobile phones are handheld electronic devices that are battery powered and therefore very sensitive to power consumption. Compared with the ordinary S IM card, the RF SIM card has a larger RF transceiver module, which consumes more power than the original S IM card, which directly affects the standby time of the mobile phone. If the power consumption of the radio frequency SIM card is too large, the standby time of the mobile phone is seriously shortened, which will affect people's use experience, which is extremely disadvantageous for promoting mobile phone payment. Therefore, how to effectively reduce the standby power consumption of the radio frequency S IM to reduce the impact on the standby time of the mobile phone has become quite heavy in the design of the radio frequency SIM card. A subject to be asked.

The low-power technologies that are currently used in RF SIM cards are usually based on a timed wake-up mechanism. RF SIM cards generally include a low power mode, called a sleep mode, and a higher power mode, called the operating mode. The prior art method for reducing the power consumption of the radio frequency S IM card is to continuously switch between the sleep and the working modes by controlling the radio frequency S IM card, so that the radio frequency SIM card works intermittently, thereby achieving lower power consumption. The advantage of this method is that the greater the ratio of sleep time to working time, the smaller the power consumption. However, when the ratio is too large, it will affect the response speed of the RF SIM card to the user, which will have a negative impact on the user experience. On the other hand, usually people brush up a few times a day, and most of the time, the RF SIM card does not need to work. The mechanism of timed wake-up will wake up at all times, making the system in a higher power state, so the overall efficiency is not high. Summary of the invention

The technical problem to be solved by the present invention is to avoid the above-mentioned deficiencies of the prior art and to propose a method for triggering a reduction of standby power consumption of a radio frequency SIM card by using a sequence, which can effectively reduce the radio frequency S IM card in standby mode. The average power consumption in the state, thus extending the standby time of the mobile phone, without affecting the performance and response speed of the radio frequency SIM card during normal operation.

The technical problem of the present invention can be achieved by adopting the following technical solutions:

A method for reducing standby power consumption of a radio frequency SIM card by using sequence triggering is provided. The radio frequency SIM card includes a main control module and a radio frequency module, and the main control module is often in a low power sleep mode. The module detects the agreed sequence signal from the radio frequency data terminal, and wakes up the main control module in the sleep mode. The main control module exchanges radio frequency data with the radio frequency data terminal through the radio frequency module, and the data control end is completed by the main control module. Switch back to sleep mode and wait for the next communication to be triggered.

Further, the radio frequency module operates in a timed wake mode.

The method for reducing the standby power consumption of the radio frequency SIM card by using the sequence triggering method comprises: performing the power-on initialization of the radio frequency SIM card in the following step 1, wherein the main control module configures the radio frequency module into a sequence detection Mode, the main control module enters sleep mode;

2 the radio frequency module detects whether there is a sequence signal agreed by the radio frequency data terminal;

3 if the radio frequency module detects the agreed sequence signal, sends an interrupt signal to the main control module;

After the main control module receives the interrupt signal, it is woken up, and the radio frequency module is configured to transmit and receive a communication transaction with the radio frequency data terminal;

After the transaction is completed, the main control module enters a sleep mode, and the radio frequency module is configured into a sequence detection mode, waiting for the next trigger communication.

Further, when the radio frequency module is in the sequence detection mode, only the necessary circuits for maintaining the sequence detection function are in the radio frequency module, and the remaining circuits are in the off state.

Further, the sequence signal is an electric field, a magnetic field, a radio frequency, a light wave, an audio, an ultrasonic, an infrared or an ultraviolet signal containing specific encoded information, and is part of a communication protocol between the radio frequency SIM card and the radio frequency data terminal.

Compared with the prior art, the technical effect of the present invention is that: most of the time, there is no radio frequency card reader around the user, and the radio frequency module of the radio frequency SIM card does not detect the agreed sequence signal, and the main control module is not Wake-up, so the main control module is in sleep mode for a long time, which can significantly reduce the power consumption of the RF SIM card. DRAWINGS

1 is a block diagram showing the system of a radio frequency SIM card involved in the method of the present invention;

2 is a schematic diagram showing the basic working flow of the method for reducing standby power consumption of a radio frequency SIM card according to the present invention. detailed description

The following is further described in detail in conjunction with the preferred embodiment shown in the drawings.

As shown in FIG. 1, the radio frequency SIM card 100 of the present invention includes a main control module 101 and a radio frequency module. 103. The main control module 101 needs to complete the functions of the traditional SIM card, including authentication during the call, short message, storage of the phone book, etc. On the other hand, the RF module 103 needs to be controlled, and the RF module is controlled. 103 realizes the transceiving work of the radio frequency data, thereby implementing the data exchange function with the radio frequency data terminal 105.

When used, the RF SIM card 100 is divided into two main modes of operation according to its power consumption: full consumption mode and low consumption mode. When in the full-power mode, the main control module 101 and the radio frequency module 103 are in a full power consumption state, and all functions of the radio frequency SIM card 100 are in a normal state, and the power consumed by the radio frequency SIM card is the largest. When in the low power mode, the main control module 101 is in a low power state such as a sleep mode, and the radio frequency module 103 is also in a low power consumption mode, also called a sequence detection mode, and only necessary circuits such as an RF sequence detection circuit are In the working state, the other circuits of the RF module 103 do not work to reduce their power consumption.

The main control module 101 can configure the radio frequency module 103 through a data interface between the main control module 101 and the radio frequency module 103 to be in a transceiving mode or a sequence detection mode. The radio frequency module 103 can wake up the main control module 101 in the sleep mode by generating the interrupt request signal 102. The radio frequency module 103 can be in a low-power sequence detection mode. When the agreed sequence signal 104 is detected, the main control module 101 in the sleep mode is awake through the interrupt request, and the main control module 101 further configures the radio frequency module 103 in the transceiver mode. The RF data terminal 105 performs the transaction. After the transaction is completed, the RF module 103 is configured to return to the sequence detection mode, and enters the sleep mode by itself, waiting for the next trigger communication.

The main control module 101 is often in a low power sleep mode. In this mode, the main control module 101 consumes a small amount of operating current, and is only woken up when the interrupt signal 102 is received, and enters the normal operating mode. RF Module 103 In the low-power sequence detection mode, only the necessary circuits to maintain the sequence detection function are active, and the remaining circuits are off, so the power consumption is low. In addition, in order to further reduce power consumption, the RF module 103 in the sequence detection mode can also work in a timed wake-up manner to further reduce power consumption without affecting the reaction speed, as detailed below:

First, the radio frequency module 103 is in a sleep mode, and after a set time Ts, the radio frequency module 103 Automatic wake-up, in sequence detection mode, starts detecting RF antenna reception data. This detection process is maintained for a maximum of another set time Tw. If the radio frequency module 103 detects the agreed sequence signal 104 within the time of Tw, the radio frequency module 103 sets the interrupt request signal 102 to wake up the main control module 101. If the sequence signal 104 conforming to the convention is not received after the time of Tw, the radio frequency module 103 returns to the sleep mode. In this way, the power consumption of the system can be further reduced.

The sequence signal 104 as described above may be an electric field of various forms including an electric field, a magnetic field, a radio frequency signal, a light wave, an audio, an ultrasonic wave, an infrared ray or an ultraviolet ray containing specific encoded information. The agreed sequence signal is part of the communication protocol of the radio frequency SIM card 100 and the radio frequency data terminal 105. Generally, only the specific radio frequency data terminal 105 can issue the agreed sequence signal 104, and other ordinary devices will not issue such a sequence signal. 104.

The method of the invention mainly comprises the following main implementation steps, as shown in FIG. 2:

A. The radio frequency module 103 is configured in a sequence detection mode, and the main control module 101 enters a sleep mode.

B. The radio frequency module 103 begins detecting the agreed sequence signal 104.

C. If the RF module 103 detects the agreed sequence signal 104, an interrupt is sent to the master module 101.

D. The main control module 101 is woken up after receiving the interrupt signal 102.

E. The main control module 101 configures the radio frequency module 103 into a transceiving mode.

F. Perform normal data transceiving transactions with the radio frequency terminal 105.

G. After the transaction is completed, go back to the steps.

Claims

Claim

A method for reducing standby power consumption of a radio frequency SIM card by using a sequence trigger, wherein the radio frequency SIM card comprises a main control module (101) and a radio frequency module (103), wherein:

The main control module (101) is often in a low power sleep mode, and when the radio frequency module (103) detects an agreed sequence signal from the radio frequency data terminal (105), the main control module in the sleep mode is woken up ( 101), the main control module (101) performs radio frequency data exchange with the radio frequency data terminal (105) through the radio frequency module (103), and after the data exchange ends, the main control module (101) re-turns to the sleep mode, waiting for the next Trigger communication at a time.

The method for reducing standby power consumption of a radio frequency SIM card by using sequence triggering according to claim 1, wherein: the radio frequency module (103) adopts a working mode of waking up periodically.

3. The method for reducing standby power consumption of a radio frequency SIM card using sequence triggering according to claim 1, wherein: the following specific steps are included,

1 The radio frequency SIM card is powered on, the main control module (101) configures the radio frequency module (103) in a sequence detection mode, and the main control module (101) enters a sleep mode;

2 the radio frequency module (103) detects whether there is an agreed sequence signal from the radio frequency data terminal (105);

3 if the radio frequency module (103) detects the agreed sequence signal, then sends an interrupt request signal to the main control module (101);

4, the main control module (101) is woken up after receiving the interrupt signal, and the radio frequency module (103) is configured to be in a transceiving mode for communicating with the radio frequency data terminal (105);

After the transaction is completed, the main control module (101) enters the sleep mode, and the radio frequency module (103) is configured in the sequence detection mode, waiting for the next trigger communication.

The method for reducing standby power consumption of a radio frequency SIM card by using a sequence trigger according to claim 3, wherein: when the radio frequency module (103) is in a sequence detection mode, in the radio frequency module (103), Only the necessary circuits to maintain the sequence detection function are active, and the remaining circuits are off.

5 . The method of claim 1 , wherein the sequence signal is an electric field, a magnetic field, a radio frequency, a light wave, an audio, an ultrasonic wave, an infrared wave, which contain specific coded information. 5 . Or UV signal.

6 . The method of claim 1 , wherein the sequence signal is a communication protocol between a radio frequency SIM card (100 ) and a radio frequency data terminal (105 ). a part of.