CN102404040A - Power management method of handheld satellite communication device - Google Patents

Abstract

Provided is a power management method of a handheld satellite communication device. The handheld satellite communication device comprises a center processing unit (CPU), a radio frequency module, a base band channel signal processing module, a business processing/controlling module and an interface displaying module. The CPU is respectively connected with the modules and sends power management control signals to the modules, wherein a radio frequency device of the device adopts an independent power supply relative to a channel. Compared with the prior art, the technical scheme has more remarkable effect on reducing power consumption of a complete machine and prolonging standby time of the device.

Description

Hand-hold type satellite communication equipment method for managing power supply

One, technical field

The present invention designs and is applicable to that mainly power consumption and stand-by time are had the individual mobile satellite communication equipment of being strict with, especially a kind of hand-hold type satellite communication equipment method for managing power supply.

Two, background technology

The application of satellite communication electronic equipment now more and more widely, and is corresponding also just increasingly high to the requirement of electronic product.The individual's mobile satellite communication equipment especially power consumption and the stand-by time of portable equipment is the problem that receives much attention always, can effectively reduce Overall Power Consumption and prolong the device standby time through optimizing power management scheme.

Three, summary of the invention

In order to solve in the prior art, reduce the requirement of Overall Power Consumption and prolongation device standby time, the present invention proposes a kind of hand-hold type satellite communication equipment method for managing power supply, and this method is the cross-module management of realization under soft, the hardware of equipment cooperate jointly.Concrete technical scheme is following:

A kind of hand-hold type satellite communication equipment method for managing power supply, said hand-hold type satellite communication equipment comprises: CPU, radio-frequency module, baseband channel signal processing module, Business Processing/control module and interface display module; CPU connects each module respectively, it is characterized in that sending the power management control signal by CPU gives each module; Wherein, the radio-frequency apparatus of this equipment adopts and the relatively independent power supply of channel;

1) for radio-frequency module, method for managing power supply is,

1.1) when this equipment is in holding state on duty, close upconverter sendaisle power supply, the power supply of paging passage only is provided;

1.2) when this equipment need communicate, open the power supply of all passages, switch back 1.1 behind the sign off) state;

2) for the baseband channel signal processing module, method for managing power supply is,

2.1) when this equipment is in holding state, close sendaisle power supply in the baseband processing module;

2.2) when this equipment need communicate, open the power supply of all passages, switch back 2.1 behind the sign off) state;

2.3) keep power supply to the single channel receive path;

3) for Business Processing/control module, method for managing power supply is,

3.1) when this equipment is in holding state, close the speech circuit power supply;

3.2) keep crypto is supplied power;

3.3) keep power supply to CPU, make CPU get into low-power consumption mode simultaneously;

3.4) when this equipment need communicate, open the power supply of all passages, switch back 3.1 behind the sign off) state;

4) for interface display module, method for managing power supply is,

4.1) when equipment is in holding state, make display screen get into low-power consumption mode;

4.2) when equipment need communicate, opening power switched back 4.1 behind the sign off) state;

4.3) when the user operates, open the display screen power supply;

4.4) display screen is according to the user operation control display switch.

On hardware designs, this programme adopts distributed power management hardware system, adopts the hardware platform of special-purpose power management chip as power management for the bigger digital circuit of power consumption (like DSP, FPGA etc.).Power management chip is the control maincenter of power supply, and the output of realization plurality of voltages also can be controlled output and other behaviors (as: protect, switch) of power supply.Control through to output can make the output of power supply satisfy various functional requirements (as: constant voltage and current limiting).The maximum advantage of power management chip is to realize complicated output control very easily, satisfies the required function of supplying power demand of chip under the various operating states, thereby practice thrift unnecessary power consumption penalty.

In software control, be on the basis with controlled power management hardware platform, the work characteristics of coupling system in user program realizes different power management policies.Its design philosophy mainly comprises three basic concepts: management strategy, operating state, operating point.In addition, power-supply management system also comprises a power supply monitoring subsystem.

Compared with prior art, the present technique scheme is more remarkable to reducing Overall Power Consumption and prolonging the device standby time.

Four, description of drawings

Fig. 1 is this power-supply management system sketch map.

CPU in the handheld terminal as professional control and administrative center, also is the core of power management not only.

CPU is through its IO pin, is in standby mode or the service communication pattern is confirmed the supply power mode to each composition module of hand-held terminal device, its sketch map such as Fig. 1 according to present terminal.

Five, embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is described further.

With reference to figure 1, a kind of scheme of hand-hold type satellite communication equipment method for managing power supply is following:

Radio-frequency apparatus adopts and the relatively independent power supply of channel, and output quality minimum and the assurance radiofrequency signal is reduced in the power supply interference of equipment.Provide the detailed design scheme of hardware and software of each module of hand-hold type satellite communication equipment being carried out power management below.

1. hardware designs

(1) radio-frequency module power management scheme

closes upconverter sendaisle power supply when equipment is in holding state, the power supply of paging passage only is provided.

is when equipment need communicate; Open the power supply of all passages; Guarantee communication completion smoothly, the state of standby on duty is switched back in power supply control behind the sign off.

The power management of radio-frequency module is realized in radio-frequency module, controlled by the control signal of CPU.Wherein EN5 is the master switch of radio frequency, and HPASW is a power amplifier switch.

(2) channel signal baseband processing module power management scheme

closes sendaisle power supply in the baseband processing module when equipment is in holding state.

is when equipment need communicate; Open the power supply of all passages; Guarantee communication completion smoothly, the state of standby on duty is switched back in power supply control behind the sign off.

terminal needs monitoring seek channel always when standby, so must keep the power supply to the single channel receive path in the baseband processing module.

In the realization of baseband channel signal processing module power management:

The LTC3441 chip: the adjustable buck DC/DC power supply chip of single channel for LINEAR company produces, the power supply up to 1.3A/3.3V can be provided, input voltage is 0-5V.In this routine power-supply management system mainly as DSP, FPGA, the D/A of baseband board except that CPU, the 3.3V power supply of chips such as A/D, output is managed each road through some MAX4798 electronic switches.

LTC3545 chip: be 3 road low-voltage output power supply chips that are specifically designed to the lithium electricity of LINEAR company production; This routine power-supply management system uses it to export VD12, DSP16, VD18 three tunnel low pressure; As the core voltage of FPGA, the core voltage of DSP and the 1.8V reference logic voltage of FPGA, three road voltages are controllable respectively respectively.

Needed other voltages adopt integrated voltage transitions chip to accomplish on the channel board; Because the conversion efficiency of this type of chip obviously is superior to power module 10%-15%, therefore adopt this scheme will more effectively solve the problem of big and self power consumption of the volume of power module own.

(3) Business Processing/control module power management scheme

closes the speech circuit power supply when equipment is in holding state.

terminal needs monitoring seek channel always when standby, therefore keep the power supply to crypto:

terminal still must keep the power supply to MCU when standby, but can make it get into low-power consumption mode;

is when equipment need communicate; Open the power supply of all passages; Guarantee communication completion smoothly, the state of standby on duty is switched back in power supply control behind the sign off.

In the realization of Business Processing/control module power management:

The MAX1586:MAX1586 chip is that U.S. letter company is the power source special managing chip of Intel PXA27x series CPU exploitation specially; For PXA271CPU provides required totally 6 road power supplys; Comprise: VIO, VMEM, VCORE, VPLL, VSRAM, VUSIM, this 6 road power supply is divided into two groups again: by VUSIM, VIO and the VMEM of SYS_EN signal controlling; VCORE, VPLL and VSRAM by PWR_EN control; Should guarantee when powering on that the SYS_EN enable signal is not later than the PWR_EN enable signal.

LT3471EDD chip: be the output two-way positive and negative voltage source chip of LINEAR company production.Its output+5V and-5V two-way voltage in this routine power-supply management system drive the analog circuit of speech part, can be turn-offed by the VOC_CTRL signal.

(4) interface display power management scheme

can make display screen get into low-power consumption mode when equipment is in holding state;

is when equipment need communicate; The palpus opening power, the state of standby on duty is switched back in power supply control behind the sign off;

should open display power supply when the user operates;

display screen should be according to the user operation control display switch.

The voltage control (VLCD_CTRL) of OLED screen is controlled as switch by MAX4798, can all turn-off.

2. software design

Management strategy is defined as in this routine power-supply management system: producer's test pattern, concealed pattern, mode standard, indicating mode, off-line mode, browse mode.

Operating state is defined as: shutdown, CPU low-power consumption, single-shot, single receipts, voice service, data service.

Operating point: the hardware controllable dot that provides by the power-supply management system circuit.The controllable dot that this routine power-supply management system provides has:

MCU：VIO、VMEM、VCORE、VPLL、VSRAM；

FGPA：VD33、VD18，VD12；

DSP：D5P33、DSP16；

AD：VA33R；

DA.VA33T；

The EN5 of radio frequency unit and HPASW;

The VLCD of OLED, and the control of the backlight illumination of OLED;

The VCCKLED of keyboard back light;

Buzzing and vibrations control.

The combination of the management strategy under software control, operating state and operating point sees the following form 1:

Power management configuration under the table 1 different terminals pattern

Claims (1)

1. hand-hold type satellite communication equipment method for managing power supply, said hand-hold type satellite communication equipment comprises: CPU, radio-frequency module, baseband channel signal processing module, Business Processing/control module and interface display module; CPU connects each module respectively, it is characterized in that sending the power management control signal by CPU gives each module; Wherein, the radio-frequency apparatus of this equipment adopts and the relatively independent power supply of channel;

1) for radio-frequency module, method for managing power supply is,

1.1) when this equipment is in holding state on duty, close upconverter sendaisle power supply, the power supply of paging passage only is provided;

1.2) when this equipment need communicate, open the power supply of all passages, switch back 1.1 behind the sign off) state;

2) for the baseband channel signal processing module, method for managing power supply is,

2.1) when this equipment is in holding state, close sendaisle power supply in the baseband processing module;

2.2) when this equipment need communicate, open the power supply of all passages, switch back 2.1 behind the sign off) state;

2.3) keep power supply to the single channel receive path;

3) for Business Processing/control module, method for managing power supply is,

3.1) when this equipment is in holding state, close the speech circuit power supply;

3.2) keep crypto is supplied power;

3.3) keep power supply to CPU, make CPU get into low-power consumption mode simultaneously;

3.4) when this equipment need communicate, open the power supply of all passages, switch back 3.1 behind the sign off) state;

4) for interface display module, method for managing power supply is,

4.1) when equipment is in holding state, make display screen get into low-power consumption mode;

4.2) when equipment need communicate, opening power switched back 4.1 behind the sign off) state;

4.3) when the user operates, open the display screen power supply;

4.4) display screen is according to the user operation control display switch.

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