CN111200661A - Internet of things terminal equipment and sleep control method thereof - Google Patents

Internet of things terminal equipment and sleep control method thereof Download PDF

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Publication number
CN111200661A
CN111200661A CN202010024401.6A CN202010024401A CN111200661A CN 111200661 A CN111200661 A CN 111200661A CN 202010024401 A CN202010024401 A CN 202010024401A CN 111200661 A CN111200661 A CN 111200661A
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internet
period
things
state
sleep
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CN111200661B (en
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冯海涛
丛丹
马建平
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Aojie Technology Shanghai Co Ltd
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Aojie Technology Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)

Abstract

The application discloses thing networking terminal equipment realizes the sleep control of ultralow power consumption through state machine based on sleep control and running mechanism thereof. The sleep control state machine defines five states of the terminal equipment of the internet of things, namely an active state S0, a standby state S1, a long standby state S2, a deep sleep state S3 and a power-off state S4, wherein the power consumption of the terminal equipment of the internet of things is reduced in sequence. The operation mechanism of the sleep control state machine is as follows: when the terminal equipment of the Internet of things enters a sleep period in a certain state, the terminal equipment of the Internet of things can enter a next state with lower power consumption only after waiting for the expiration of a period of time; a lower power consumption state in which the duration of the sleep period is longer; and vice versa. The terminal equipment of the Internet of things is designed with three states including sleep periods, and the states are switched through the operation mechanism, so that the power consumption of the terminal equipment of the Internet of things can be greatly reduced.

Description

Internet of things terminal equipment and sleep control method thereof
Technical Field
The application relates to an adaptive power saving control technology of an Internet of things Terminal (IoT Terminal) device.
Background
The terminal of the internet of things has four key characteristics of strong coverage, low cost, ultralow power consumption and large connection, wherein the ultralow power consumption is the most remarkable characteristic of the terminal of the internet of things different from the traditional wireless communication terminal. For example, based on a 5000mAh AA battery, the power consumption of the internet of things terminal is targeted to a lifetime of more than 10 years.
Disclosure of Invention
The technical problem that this application will be solved provides an thing networking terminal with ultra-low power consumption. Therefore, the application also provides a corresponding sleep control method of the terminal of the internet of things.
In order to solve the technical problem, the application discloses an internet of things terminal device, which comprises a processor, a power management unit, a timer group, a memory and an external interrupt response unit. The processor is used for processing one or more communication protocols of the Internet of things. The power management unit is used for providing power management and sleep control services for the terminal equipment of the Internet of things; the power management unit is matched with an Internet of things protocol processed by the processor, and the sleep control with ultra-low power consumption is realized through a state machine based on the sleep control and an operation mechanism thereof. The sleep control state machine defines five states of the terminal equipment of the internet of things, namely an active state S0, a standby state S1, a long standby state S2, a deep sleep state S3 and a power-off state S4, wherein the power consumption of the terminal equipment of the internet of things is reduced in sequence. The active state S0 refers to the Internet of things terminal equipment executing network searching, cell residence and cell registration processes, preparing to initiate or respond to services, and establishing uplink and downlink communication links with a network end; or in the service-in-progress, link-maintenance phase. The standby state S1 is that the terminal device of the internet of things maintains a standby state, the processor stops working, and other components maintain working. The long standby state S2 means that the processor, the external device, and the bus clock of the terminal device of the internet of things stop working, and the power management unit, the timer group, and the external interrupt response unit remain in the standby state and wait for the event to trigger and wake up. The deep sleep state S3 is that the terminal device of the internet of things writes the memory data into the nonvolatile memory, and other system components except the timer group and the external interrupt response unit stop working. The shutdown state S4 indicates that the terminal device of the internet of things is turned off and is not powered on. The operation mechanism of the sleep control state machine is as follows: when the terminal equipment of the Internet of things enters a sleep period in a certain state, the terminal equipment of the Internet of things can enter a next state with lower power consumption only after waiting for the expiration of a period of time; a lower power consumption state in which the duration of the sleep period is longer; and vice versa. The timer group comprises a group of timers which are used for providing timing services with different time lengths. The memory is a non-volatile memory and is used for supporting the terminal equipment of the internet of things to store necessary information when sleeping in the standby state S1, sleeping in the long standby state S2 and sleeping in the deep sleep state S3. The external interrupt response unit is used for supporting the terminal equipment of the internet of things to immediately respond to an external event and wake up from the sleeping time in the standby state S1, the sleeping time in the long standby state S2 and the sleeping time in the deep sleep state S3.
The terminal equipment of the Internet of things is designed with three states including sleep periods, and the states are switched through the operation mechanism, so that the power consumption of the terminal equipment of the Internet of things can be greatly reduced.
Further, in the standby state S1, standby periods are defined, each standby period includes an awake period and a first sleep period; during the awakening period, the Internet of things terminal equipment listens for paging messages, or implements wireless signal measurement, or receives system broadcast messages; thereafter, if no other event needs to be processed, the first sleep period is entered until the next standby period begins, and so on. This is a preferred implementation.
Further, the value of the standby period is any one of 128ms, 256ms, 512ms, 1024ms, 2048ms and 4096 ms; the length of the wake-up period is several to several tens of ms. This is a preferred range of values.
Further, a long standby period is defined in the long standby state S2; each long standby period comprises a long standby waiting period and a second sleep period; a long standby waiting period also comprises NS2A standby period; in the long standby waiting period, the terminal of the internet of things processes according to the standby period of the standby state S1; after the long standby waiting period expires, if the terminal of the Internet of things has no other active events, entering a second sleep period; the length of the second sleep period is greater than the length of the first sleep period. This is a preferred implementation.
Further, the value of the long standby period is any one of 8s, 16s, 32s, 64s, 128s, 256s, 512s, 1024s, and 2048 s. This is a preferred range of values.
Further, said NS2Is in the range of 1, 2 or 3. This is a preferred range of values.
Further, the deep sleep state S3 defines a deep sleep period TS3(ii) a Each deep sleep cycle comprises a deep sleep waiting period and a third sleep period; a deep sleep latency period comprising NS3A long standby period; in the deep sleep waiting period, the terminal equipment of the Internet of things processes according to a long standby state S2; after the deep sleep waiting period expires, if the terminal of the Internet of things has no other active events, entering a third sleep period; the length of the third sleep period is far longer than that of the second sleep period, and far longer than that of the second sleep period by more than or equal to 10 times. This is a preferred implementation.
Further, the value of the deep sleep cycle is any one of 32min, 64min, 128min, 512min, 1024min and 2048 min. This is a preferred range of values.
Further, said NS3Is in the range of 1, 2 or 3. This is a preferred range of values.
Further, the standby period, the long standby period and the deep sleep period are controlled by a step difference function f (x) to be increased; the long standby waiting period and the deep sleep waiting period are also controlled by the step difference function f (x) to be increased. This is a preferred implementation.
Further, the step difference function f (x) is a linear function or an exponential function. This is a preferred implementation.
Further, the processor enables the terminal device of the internet of things to enter a standby state S1 after the service of the terminal device of the internet of things in the active state S0 is completed or the link is released; the processor also listens for paging messages, or performs radio signal measurements, or receives system broadcast messages during the wake-up period of each standby cycle; if no other event needs to be processed later, the terminal equipment of the Internet of things is enabled to enter the standby period for the rest timeEntering a first sleep period until the beginning of the next standby period, and repeating the steps; the processor also maintains N in the standby state S1S2After a standby period, namely a long standby waiting period, the terminal equipment of the internet of things enters a long standby state S2; the processor also executes in the manner described above during the long standby waiting period of each long standby period; if no other event needs to be processed later, the terminal equipment of the internet of things enters a second sleep period in the remaining time of the long standby period until the next long standby period begins, and the steps are repeated; the processor also maintains N in the long standby state S2S3After a long standby period, namely a deep sleep waiting period, the terminal equipment of the internet of things enters a deep sleep state S3; the processor also executes in the manner described above during the deep sleep latency of each deep sleep cycle; and if no other event needs to be processed later, the terminal equipment of the internet of things enters a third sleep period in the remaining time of the deep sleep period until the next deep sleep period begins, and the steps are repeated. This is a preferred implementation of the internet of things terminal device provided by the application.
Further, the processor also enters a shutdown state S4 in the active state S0 or the standby state S1 after receiving a shutdown command, performing a de-registration process with the network, and terminating the event being performed; the processor also enters the active state S0 upon power-on or receipt of an activate command in the power-off state S4. This is a preferred implementation.
The application also discloses a sleep control method of the terminal of the Internet of things, which comprises the following steps. Step S610: after the service of the terminal equipment of the internet of things in the active state S0 is completed or the link is released, entering a standby state S1; the standby state S1 defines a standby period. Step S620: in the awakening period of each standby period, the terminal equipment of the Internet of things intercepts paging messages, or implements wireless signal measurement, or receives system broadcast messages; if no other events need to be processed later, the terminal device of the internet of things enters the first sleep period for the rest time of the standby period until the next standby period begins, and the process is repeated. Step S630: terminal device of Internet of thingsStand-by state S1 for maintaining NS2After one standby period, namely reaching the long standby waiting period, entering a long standby state S2; the long standby state S2 defines a long standby period. Step S640: during the long standby waiting period of each long standby period, executing according to step S620 to step S630; if no other event needs to be processed later, the terminal equipment of the internet of things enters a second sleep period in the remaining time of the long standby period until the next long standby period begins, and the steps are repeated; the length of the second sleep period is greater than the length of the first sleep period. Step S650: when the terminal equipment of the Internet of things maintains N in the long standby state S2S3After a long standby period, namely a deep sleep waiting period is reached, entering a deep sleep state S3; the deep sleep state S3 defines a deep sleep cycle. Step S660: in the deep sleep waiting period of each deep sleep cycle, the steps from S640 to S650 are performed; if no other event needs to be processed later, the internet of things terminal equipment enters a third sleep period in the remaining time of the deep sleep period until the next deep sleep period begins, and the steps are repeated; the length of the third sleep period is far longer than that of the second sleep period, and far longer than that of the second sleep period by more than or equal to 10 times.
According to the sleep control method of the terminal equipment of the Internet of things, three states including the sleep period are designed, and the states are switched through the operation mechanism, so that the power consumption of the terminal equipment of the Internet of things can be greatly reduced.
Further, the steps S610 to S620 specifically include. Step S710: and entering a standby state S1 after the service of the Internet of things terminal device in the active state S0 is completed or the link is released. Step S720: in the standby state S1, the terminal device of the internet of things first enters a wake-up period, in which the terminal device of the internet of things performs a wake-up operation, including listening for paging messages, or performing wireless signal measurement, or receiving system broadcast messages, or synchronizing timing, or synchronizing registration information with the network. Step S730: after the terminal equipment of the internet of things executes the awakening operation, if no other event needs to be processed later, the terminal equipment enters a first sleep period in the remaining time of the standby period, and starts the timing of the first sleep period. Step S740: when the timing of the first sleep period is reached, the internet of things terminal device enters the standby state S1 for the next standby period, and returns to step S720. This is a preferred implementation.
Further, in the standby state S1, once the terminal of the internet of things is triggered by a paging event, or the terminal device of the internet of things actively establishes a connection with the network, or an external interrupt response event, the terminal device of the internet of things immediately wakes up, exits from the standby state S1, enters the active state S0, and establishes a paging or link, initiates or responds to a service. This is a preferred implementation.
Further, once the internet of things terminal in the standby state S1 receives the shutdown command and executes the deregistration process with the network, if there is no event currently being executed, the internet of things terminal device directly enters the shutdown state S4; if some events which are being executed exist currently, the terminal device of the internet of things enters the active state S0 to immediately terminate the events, exits the active state S0 after the events are terminated, and enters the power-off state S4. This is a preferred implementation.
Further, the steps S630 to S640 specifically include. Step S810: when the terminal equipment of the Internet of things maintains N in the standby state S1S2After the standby period, i.e., when the long standby waiting period is reached, the long standby state S2 is entered. Step S820: during the long standby waiting period of each long standby period, execution is performed as in steps S620 to S630. Step S830: after the long standby waiting period is ended, if no other event needs to be processed, the terminal device of the internet of things enters a second sleep period in the long standby state S2 for the remaining time of the long standby period, and starts timing of the second sleep period. Step S840: when the timing of the second sleep period is reached, the terminal device of the internet of things enters the next long standby period of the long standby state S2, and the process returns to step S820. This is a preferred implementation.
Further, in the long standby state S2, once the terminal device of the internet of things is triggered by a paging event, or the terminal device of the internet of things actively establishes a connection with the network, or an external interrupt response event, the terminal device of the internet of things immediately wakes up, exits from the long standby state S2, enters the active state S0, and establishes a paging or link, initiates or responds to a service. This is a preferred implementation.
Further, the steps S650 to S660 specifically include. Step S910: when the terminal equipment of the Internet of things maintains N in the long standby state S2S3After a long standby period, i.e., when a deep sleep waiting period is reached, the deep sleep state S3 is entered. Step S920: during the deep sleep waiting period of each deep sleep cycle, the processing is performed according to steps S640 to S650. Step S930: after the deep sleep waiting period is ended, if no other event needs to be processed, the terminal device of the internet of things enters a third sleep period in the deep sleep state S3 in the remaining time of the deep sleep period, and starts timing of the third sleep period. Step S940: when the timing of the third sleep period is reached, the terminal device of the internet of things enters the next deep sleep cycle of the deep sleep state S3, and the process returns to step S920. This is a preferred implementation.
Further, once the terminal device of the internet of things is actively connected with the network or triggered by an external interrupt response event in the deep sleep state S3, the terminal device of the internet of things immediately wakes up, exits from the deep sleep state S3, enters the active state S0, and establishes a link, initiates or responds to a service. This is a preferred implementation.
The technical effect obtained by the application is that the sleep control of the ultra-low power consumption of the mobile terminal of the Internet of things is realized based on the state machine of the sleep control and the operation mechanism thereof.
Drawings
Fig. 1 is a schematic structural diagram of an internet of things terminal provided by the present application.
Fig. 2 is a schematic diagram of a state machine based on sleep control provided by the power management unit 120 of the present application.
FIG. 3 shows the standby period T defined in the standby state S1S1Schematic representation of (a).
FIG. 4 shows a long standby period T defined in the long standby state S2S2Schematic representation of (a).
FIG. 5 is a deep sleep cycle T defined in the deep sleep state S3S3Schematic representation of (a).
Fig. 6 is a flowchart of a sleep control method of an internet of things terminal provided by the present application.
Fig. 7 is a flowchart of a specific implementation of steps S610 to S620 in fig. 6.
Fig. 8 is a flowchart of a specific implementation of steps S630 to S640 in fig. 6.
Fig. 9 is a flowchart of a specific implementation of steps S650 to S660 in fig. 6.
The reference numbers in the figures illustrate: 100 is terminal equipment of the internet of things; 110 is a processor; 120 is a power management unit; 130 is a timer group; 140 is a memory; 150 is an external interrupt response unit.
Detailed Description
Referring to fig. 1, the internet of things terminal device 100 includes a processor 110, a power management unit 120, a timer group 130, a memory 140, and an external interrupt response unit 150.
The processor 110 further includes a central processor computing unit, an on-chip cache memory, or an off-chip memory unit, which may process or apply one or more different types of internet of things communication protocols. The internet of things Communication protocol includes, for example, GSM (Global System for Mobile Communications), GPRS (general packet Radio Service), LTE CAT 1 (LTE Category 1), LTE-M (LTE-MTC, LTE-Machine Type Communication), LTE CAT-M1 (eMTC, enhanced Machine Type Communication), Zigbee-IoT (narrow band NB, internet of things), Zigbee (Long Range ), Bluetooth (Bluetooth), WiFi (wireless hot spot), and the like.
The power management unit 120 is configured to provide power management and sleep control services for the terminal device 100 of the internet of things. The power management unit 120 cooperates with an internet of things protocol applied by the processor 110, and implements sleep control with ultra-low power consumption through a state machine based on sleep control and an operation mechanism thereof.
The timer group 130 includes a group of timers, is used to provide timing services with different durations, and is suitable for different application scenarios such as a specific function of an internet of things communication protocol, a power management function, a sleep control (including a sleep execution function and a sleep waiting function), and the like.
The memory 140 is used to support the internet of things terminal device 100 to store necessary information when sleeping in the standby state S1, when sleeping in the long standby state S2, and when sleeping in the deep sleep state S3. The memory 140 is a non-volatile memory (NVM), i.e. its stored data is not lost in case of power failure (power off).
The external interrupt response unit 150 is configured to support the terminal device 100 of the internet of things to immediately respond to an external event, and wake up from the time of sleeping in the standby state S1, the time of sleeping in the long standby state S2, and the time of sleeping in the deep sleep state S3, so as to initiate a necessary service and link establishment request to the network end of the internet of things.
Referring to fig. 2, the sleep control state machine defines five states of the internet of things terminal device 100, which are an active state S0, a standby state S1, a long standby state S2, a deep sleep state S3, and an off state S4. These five states correspond one-to-one to the power consumption target levels. The power consumption target level S0 corresponding to the active state S0 expects the power consumption to be in the range of tens of mA. The standby state S1 corresponds to a target level of power consumption S1, where power consumption is expected to be within a few mA. The long standby state S2 corresponds to a power consumption target level S2, where power consumption is expected to be within a few μ a. The deep sleep state S3 corresponds to a power consumption target level S3, where power consumption is expected to be within a few nA. The desired power consumption is 0 at the power consumption target level S4 corresponding to the off state S4.
The active state S0 is the internet of things terminal 100 executing network searching, cell residence and cell registration processes, preparing to initiate or respond to a service, and establishing uplink and downlink communication links with a network end; or in the service-in-progress, link-maintenance phase.
The standby state S1 means that the terminal 100 of the internet of things maintains the standby state, the processor 110 stops working, and other components can still maintain working. In this state, the terminal 100 of the internet of things maintains only some necessary downlinks with the network side, and periodically listens for paging messages, receives system broadcast messages, or performs radio signal measurement, etc. in a discontinuous reception mode.
Referring to FIG. 3, the standby state S1 defines a standby period TS1The value is, for example, 128ms, 256ms, 512ms, 1024ms, 2048ms, 4096ms, etc., and the internet of things terminal is notified by the network terminal through the system broadcast message and other ways, and the internet of things terminal is notified every other standby period TS1Awakening once. Standby period TS1Comprising an awake period TWP(typically several to tens of ms) and a first sleep period of length TS1－TWP. The terminal of the Internet of things is in an awakening period TWPInternal attempts to listen for paging messages, or to perform radio signal measurements, or to receive system broadcast messages. If no other event needs to be processed later, then in the standby period TS1The terminal of the internet of things in the rest time enters a first sleep period until the next standby period TS1Initially, this is repeated.
The long standby state S2 means that the processor 110 of the internet of things terminal 100 stops working, the external device is basically turned off, and the bus clock is also turned off; the power management unit 120, the timer group 130, and the external interrupt response unit 150 remain in a standby state and wait for an event to trigger wake-up.
Referring to fig. 4, the long standby state S2 defines a long standby period TS2The values are, for example, 8s, 16s, 32s, 64s, 128s, 256s, 512s, 1024s, 2048s, and the like, which are generally in units of seconds. Long standby period TS2Including a long standby Waiting period (S2 Waiting Time) TS2WTAnd a second sleep period having a length TS2－TS2WT. A long standby waiting period TS2WTAnd also comprises NS2A standby period TS1. Preferably, NS2Is 1, 2 or 3, N in FIG. 4S2Exemplarily taking the value 2. Terminal of internet of things in long standby waiting period TS2WTStandby period T of internal-according-to-standby state S1S1Listening for paging and sleep; in the long standby waiting period TS2WTAfter the terminal of the internet of things expires, if no other active event exists, the terminal of the internet of things immediately enters a second sleep period so as to achieve the purpose of saving enough power. The length of the second sleep period is greater than the length of the first sleep period.
The deep sleep state S3 means that the terminal 100 of the internet of things writes the memory data into the nonvolatile memory 140, and other system components basically stop working, except that a hardware timing sub-module for performing sleep control in the timer group 130 and a specific external interrupt wake-up source in the external interrupt response unit 150 can continue to work at a minimum.
Referring to FIG. 5, the deep sleep state S3 defines a deep sleep period TS3Generally, the value is, for example, 32min, 64min, 128min, 512min, 1024min, 2048min, etc., in units of minutes or hours. Deep sleep cycle TS3Including a deep sleep Waiting period (S3 Waiting Time) TS3WTAnd a third sleep period. The third sleep period, also known as a deep sleep period (DST), has a length TS3－TS3WT. A deep sleep waiting period TS3WTAnd also comprises NS3A long standby period TS2. Preferably, NS3Is 1, 2 or 3, N in FIG. 5S3Exemplarily taking the value 2. Terminal of internet of things in deep sleep waiting period TS3WTThe paging message is still intercepted or discontinuously received according to the long standby state S2. Deep sleep latency period TS3WTAnd after the expiration, the terminal of the Internet of things immediately enters a deep sleep period. During the period, except for a timer for timing the deep sleep period, almost all other modules or units of the terminal of the internet of things are closed, and the whole equipment maintains the lowest power consumption state which is close to the power-off state. The relevant context information of the terminal of the internet of things is stored in the nonvolatile memory, so that the context information can be restored immediately after the equipment enters the active state S0, and the equipment can immediately enter a normal working state. The length of the third sleep period is much longer than the length of the second sleep period, which is more than or equal to 10 times longer than the second sleep period.
The power-off state S4 indicates that the terminal of the internet of things is turned off and is not powered on.
The operation mechanism of the sleep control state machine is as follows: when the terminal equipment of the internet of things enters a sleep period in a certain state, the terminal equipment of the internet of things can enter the next state with lower power consumption only after waiting for the expiration of a period of time. A lower power consumption state in which the duration of the sleep period is longer; and vice versa.
Preferably, the standby period TS1Long standby period TS2Deep sleep period TS3Is controlled by the step difference function f (x) to increase.
Preferably, a long standby waiting period TS2WTDeep sleep latency period TS3WTIs also controlled by the step difference function f (x) to increase.
The level difference function f (x) can select different basic functions including a linear function, an exponential function and the like according to different internet of things terminal devices (user equipment). When a linear function y ═ f, (x) ax + b is used, the step size y increases linearly. When the exponential function y ═ f (x) ═ a is selectedx+ b, the step y grows exponentially. Where a is the incremental step factor and b is the user ID value calculated after the user equipment registers in the network system, and can be calculated by the function b = h (ID). Where id is a user equipment identification value, e.g., a series of hexadecimal values; the h () function is, for example, a hash function for discretely allocating user ID values of the internet-of-things terminal devices in a nearly even distribution.
Preferably, the network end will calculate T according to the above-mentioned mannerS1、TS2、TS3、TS2WT、TS3WTConfigured to the user equipment in each wake-up period TWPAnd the position monitors the broadcast and paging of the network end and adopts the parameters configured by the network end. Or, the T is determined between the user equipment and the network terminal through a negotiation modeS1、TS2、TS3、TS2WT、TS3WTThe specific value of (a). For example, a plurality of step function f (x) are predetermined between the ue and the network, so that only one negotiation is needed to change the step function, and T can be adjusted onceS1、TS2、TS3、TS2WT、TS3WTAnd the values of a plurality of parameters are equal.
Please refer to fig. 6, which is a sleep control method for an internet of things terminal provided in the present application, including the following steps.
Step S610: when the terminal equipment of the Internet of things is in the active state S0After the completion of the transaction or the release of the link, the standby state S1 is entered. The standby state S1 defines a standby period TS1。
Step S620: in each standby period TS1Wake-up period of (T)WPThe terminal equipment of the Internet of things tries to listen to paging messages, or carries out wireless signal measurement, or receives system broadcast messages; if no other event needs to be processed later, then in the standby period TS1The rest time Internet of things terminal equipment enters a first sleep period until the next standby period TS1Initially, so forth;
step S630: when the terminal equipment of the Internet of things maintains N in the standby state S1S2A standby period TS1After that, the long standby waiting period T is reachedS2WTThen the long standby state S2 is entered. The long standby state S2 defines a long standby period TS2。
Step S640: in each long standby period TS2Long standby waiting period T ofS2WTAnd is executed according to step S620 to step S630. If no other events need to be processed thereafter, then in the long standby period TS2The rest time Internet of things terminal equipment enters a second sleep period until the next long standby period TS2Initially, so forth; the length of the second sleep period is greater than the length of the first sleep period.
Step S650: when the terminal equipment of the Internet of things maintains N in the long standby state S2S3A long standby period TS2After that, the deep sleep waiting period T is reachedS3WTThen the deep sleep state S3 is entered. The deep sleep state S3 defines a deep sleep period TS3。
Step S660: in each deep sleep period TS3Deep sleep latency period TS3WTAnd is executed according to steps S640 to S650. If no other events need to be processed thereafter, then in the deep sleep period TS3The rest time Internet of things terminal equipment enters a third sleep period until the next deep sleep period TS3Initially, so forth; the length of the third sleep period is much greater than the length of the second sleep period.
In addition, the terminal device in the active state S0 or the standby state S1 enters the shutdown state S4 after receiving the shutdown command, performing the de-registration process with the network, and terminating the event being performed. And the internet of things terminal device in the power-off state S4 enters the active state S0 once being powered on or receiving an activation command.
Corresponding to the sleep control method of the terminal of the internet of things shown in fig. 6, the present application also provides a terminal of the internet of things, which is also shown in fig. 1. The processor 110 further causes the terminal device of the internet of things to enter the standby state S1 after the service of the terminal device of the internet of things in the active state S0 is completed or the link is released. The processor 110 also operates in each standby period TS1Wake-up period of (T)WPAttempting to listen for paging messages, or to perform radio signal measurements, or to receive system broadcast messages; if no other event needs to be processed later, then in the standby period TS1The rest time of the network of things enables the terminal equipment of the internet of things to enter a first sleep period until the next standby period TS1Initially, this is repeated. The processor 110 also maintains N in the standby state S1S2A standby period TS1After that, the long standby waiting period T is reachedS2WTAnd then, the terminal equipment of the internet of things enters a long standby state S2. The processor 110 is also in each long standby period TS2Long standby waiting period T ofS2WTAnd is performed in the manner described above. If no other events need to be processed thereafter, then in the long standby period TS2The rest time of the network of things enables the terminal equipment of the internet of things to enter a second sleep period until the next long standby period TS2Initially, this is repeated. The processor 110 also maintains N in the long standby state S2S3A long standby period TS2After that, the deep sleep waiting period T is reachedS3WTAnd then, the terminal equipment of the internet of things enters a deep sleep state S3. The processor 110 also operates at each deep sleep period TS3Deep sleep latency period TS3WTAnd is performed in the manner described above. If no other events need to be processed thereafter, then in the deep sleep period TS3The rest time of the network of things enables the terminal equipment of the internet of things to enter a third sleep period until the next deep sleep period TS3At the beginning, so on。
Preferably, the processor 110 further enters the power-off state S4 in the active state S0 or the standby state S1 after receiving the power-off command, performing the de-registration process with the network, and terminating the executing event. The processor 110 also enters the active state S0 upon power-on or receipt of an activate command in the power-off state S4.
Referring to fig. 7, the sleep control and wake-up method in the standby state S1 includes the following steps. This is also a specific implementation of the steps S610 to S620.
Step S710: and entering a standby state S1 after the service of the Internet of things terminal device in the active state S0 is completed or the link is released.
Step S720: under the standby state S1, the terminal equipment of the Internet of things firstly enters the wake-up period TWPIn the wake-up period TWPThe intranet terminal device performs some common short-time wake-up operations, such as attempting to listen for paging messages, or performing wireless signal measurements, or receiving system broadcast messages, or synchronizing timing, or synchronizing registration information with the network side, etc.
Step S730: after the terminal equipment of the internet of things executes the wakeup operation, if no other event needs to be processed later, the terminal equipment of the internet of things executes the wakeup operation in the standby period TS1Enters a first sleep period and starts the timing T of the first sleep periodS1－TWP。
Step S740: timing T when first sleep periodS1－TWPAfter the terminal equipment of the internet of things arrives, the terminal equipment of the internet of things enters a standby state S1 for the next standby period TS1Then, the process returns to step S720.
In addition, in the standby state S1, once the terminal of the internet of things is triggered by a paging event, or the terminal device of the internet of things actively establishes a connection with the network, or an external interrupt response event, the terminal device of the internet of things immediately wakes up, exits from the standby state S1, enters the active state S0, and establishes a paging or link, initiates or responds to a service. It is then determined whether to enter the standby state S1 according to the method shown in fig. 7.
In addition, once the internet of things terminal in the standby state S1 receives the shutdown command and executes the deregistration process with the network, if there is no event currently being executed, the internet of things terminal device directly enters the shutdown state S4; if some events which are being executed exist currently, the terminal device of the internet of things enters the active state S0 for a short time to immediately terminate the events, exits the active state S0 after the events are terminated, and enters the power-off state S4.
Referring to fig. 8, the sleep control and wake-up method in the long standby state S2 includes the following steps. This is also a specific implementation of the steps S630 to S640.
Step S810: when the terminal equipment of the Internet of things maintains N in the standby state S1S2A standby period TS1After that, the long standby waiting period T is reachedS2WTThen the long standby state S2 is entered.
Step S820: in each long standby period TS2Long standby waiting period T ofS2WTAnd is executed according to step S620 to step S630.
Step S830: in the long standby waiting period TS2WTAfter the end, if no other event needs to be processed later, the terminal equipment of the internet of things is in the long standby period TS2Enters the second sleep period in the long standby state S2 and starts the timer T of the second sleep periodS2－TS2WT。
Step S840: when the timing of the second sleep period TS2－TS2WTAfter the terminal equipment of the internet of things arrives, the terminal equipment of the internet of things enters a next long standby period T of the long standby state S2S2Then, the process returns to step S820.
In addition, in the long standby state S2, once the terminal device of the internet of things is triggered by a paging event, or the terminal device of the internet of things actively establishes a connection with the network, or an external interrupt response event, the terminal device of the internet of things immediately wakes up, exits from the long standby state S2, enters the active state S0, and establishes a paging or link, initiates or responds to a service. It is then determined whether to enter the standby state S1 in accordance with the method shown in step S610.
Referring to fig. 9, the sleep control and wake-up method in the deep sleep state S3 includes the following steps. This is also a specific implementation of the steps S650 to S660.
Step S910: when the terminal equipment of the Internet of things maintains N in the long standby state S2S3A long standby period TS2After that, the deep sleep waiting period T is reachedS3WTThen the deep sleep state S3 is entered.
Step S920: in each deep sleep period TS3Deep sleep latency period TS3WTAnd is executed according to steps S640 to S650.
Step S930: in the deep sleep waiting period TS3WTAfter the end, if no other event needs to be processed later, the terminal equipment of the internet of things is in the deep sleep period TS3Enters a third sleep period in the deep sleep state S3 and starts a timer T of the third sleep periodS3－TS3WT。
Step S940: when the timing of the third sleep period TS3－TS3WTAfter the terminal equipment arrives, the terminal equipment of the Internet of things enters the next deep sleep period T of the deep sleep state S3S3Then, the process returns to step S920.
In addition, in the deep sleep state S3, once the terminal device of the internet of things is triggered by an active connection establishment with the network or an external interrupt response event, the terminal device of the internet of things immediately wakes up, exits from the deep sleep state S3, enters the active state S0, and establishes a link, initiates or responds to a service. It is then determined whether to enter the standby state S1 in accordance with the method shown in step S610.
According to the Internet of things terminal and the sleep control method thereof, the Internet of things equipment enters the next state with lower power consumption one by one when the Internet of things equipment is idle, so that the power consumption is reduced as much as possible; meanwhile, a wake-up period is periodically provided for the terminal equipment of the Internet of things to carry out necessary wake-up operation.
The above are merely preferred embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (21)

1. An Internet of things terminal device is characterized by comprising a processor, a power management unit, a timer group, a memory and an external interrupt response unit;
the processor is used for processing one or more Internet of things communication protocols;
the power management unit is used for providing power management and sleep control services for the terminal equipment of the Internet of things; the power management unit is matched with an Internet of things protocol processed by the processor, and the sleep control with ultra-low power consumption is realized through a state machine based on the sleep control and an operation mechanism thereof;
the sleep control state machine defines five states of the terminal equipment of the internet of things, namely an active state S0, a standby state S1, a long standby state S2, a deep sleep state S3 and a power-off state S4, wherein the power consumption of the terminal equipment of the internet of things is reduced in sequence;
the active state S0 refers to the Internet of things terminal equipment executing network searching, cell residence and cell registration processes, preparing to initiate or respond to services, and establishing uplink and downlink communication links with a network end; or in the service proceeding and link maintaining stage;
the standby state S1 means that the terminal equipment of the Internet of things maintains a standby state, the processor stops working, and other components maintain working;
the long standby state S2 means that the processor, the external device and the bus clock of the terminal device of the Internet of things stop working, the power management unit, the timer group and the external interrupt response unit are kept in standby state, and waiting for the event to trigger and wake up;
the deep sleep state S3 means that the terminal equipment of the Internet of things writes the memory data into the nonvolatile memory, and other system components except the timer group and the external interrupt response unit stop working;
the shutdown state S4 means that the terminal equipment of the Internet of things is shut down and is not powered on;
the operation mechanism of the sleep control state machine is as follows: when the terminal equipment of the Internet of things enters a sleep period in a certain state, the terminal equipment of the Internet of things can enter a next state with lower power consumption only after waiting for the expiration of a period of time; a lower power consumption state in which the duration of the sleep period is longer; and vice versa;
the timer group comprises a group of timers which are used for providing timing services with different time lengths;
the memory is a non-volatile memory and is used for supporting the terminal equipment of the internet of things to store necessary information when sleeping in a standby state S1, a long standby state S2 and a deep sleep state S3;
the external interrupt response unit is used for supporting the terminal equipment of the internet of things to immediately respond to an external event and wake up from the sleeping time in the standby state S1, the sleeping time in the long standby state S2 and the sleeping time in the deep sleep state S3.
2. The internet of things terminal device of claim 1, wherein standby states S1 define standby periods, each standby period including an awake period and a first sleep period; during the awakening period, the Internet of things terminal equipment listens for paging messages, or implements wireless signal measurement, or receives system broadcast messages; thereafter, if no other event needs to be processed, the first sleep period is entered until the next standby period begins, and so on.
3. The internet of things terminal device of claim 2, wherein the standby period takes any one of 128ms, 256ms, 512ms, 1024ms, 2048ms and 4096 ms; the length of the wake-up period is several to several tens of ms.
4. The internet of things terminal device of claim 2, wherein a long standby period is defined in the long standby state S2; each long standby period comprises a long standby waiting period and a second sleep period; a long standby waiting period also comprises NS2A standby period; in the long standby waiting period, the terminal of the internet of things processes according to the standby period of the standby state S1; after the long standby waiting period expires, if the terminal of the Internet of things has no other active events, entering a second sleep period; the length of the second sleep period is greater than the length of the first sleep period.
5. The internet of things terminal device of claim 4, wherein the long standby period takes any one of 8s, 16s, 32s, 64s, 128s, 256s, 512s, 1024s, and 2048 s.
6. The terminal equipment of the internet of things as claimed in claim 4, wherein N isS2Is in the range of 1, 2 or 3.
7. The terminal device of the internet of things as claimed in claim 4, wherein the deep sleep state S3 defines a deep sleep period TS3(ii) a Each deep sleep cycle comprises a deep sleep waiting period and a third sleep period; a deep sleep latency period comprising NS3A long standby period; in the deep sleep waiting period, the terminal equipment of the Internet of things processes according to a long standby state S2; after the deep sleep waiting period expires, if the terminal of the Internet of things has no other active events, entering a third sleep period; the length of the third sleep period is far longer than that of the second sleep period, and far longer than that of the second sleep period by more than or equal to 10 times.
8. The internet of things terminal device of claim 7, wherein the value of the deep sleep cycle is any one of 32min, 64min, 128min, 512min, 1024min and 2048 min.
9. The internet of things terminal device of claim 7, wherein N isS3Is in the range of 1, 2 or 3.
10. The terminal equipment of the internet of things of claim 7, wherein the standby period, the long standby period and the deep sleep period are controlled by a step difference function f (x) to increase progressively; the long standby waiting period and the deep sleep waiting period are also controlled by the step difference function f (x) to be increased.
11. The internet of things terminal device of claim 10, wherein the level difference function f (x) is a linear function or an exponential function.
12. The internet of things terminal device of claim 1, wherein the processor further causes the internet of things terminal device to enter a standby state S1 after a service of the internet of things terminal device in an active state S0 is completed or a link is released; the processor also listens for paging messages, or performs radio signal measurements, or receives system broadcast messages during the wake-up period of each standby cycle; if no other event needs to be processed later, the terminal equipment of the internet of things enters a first sleep period in the remaining time of the standby period until the next standby period begins, and the steps are repeated; the processor also maintains N in the standby state S1S2After a standby period, namely a long standby waiting period, the terminal equipment of the internet of things enters a long standby state S2; the processor also executes in the manner described above during the long standby waiting period of each long standby period; if no other event needs to be processed later, the terminal equipment of the internet of things enters a second sleep period in the remaining time of the long standby period until the next long standby period begins, and the steps are repeated; the processor also maintains N in the long standby state S2S3After a long standby period, namely a deep sleep waiting period, the terminal equipment of the internet of things enters a deep sleep state S3; the processor also executes in the manner described above during the deep sleep latency of each deep sleep cycle; and if no other event needs to be processed later, the terminal equipment of the internet of things enters a third sleep period in the remaining time of the deep sleep period until the next deep sleep period begins, and the steps are repeated.
13. The internet of things terminal device of claim 12, wherein the processor further enters a shutdown state S4 upon receiving a shutdown command and performing a de-registration procedure with the network and terminating an event being performed in the active state S0 or the standby state S1; the processor also enters the active state S0 upon power-on or receipt of an activate command in the power-off state S4.
14. A sleep control method for an Internet of things terminal is characterized by comprising the following steps:
step S610: after the service of the terminal equipment of the internet of things in the active state S0 is completed or the link is released, entering a standby state S1; the active state S0 refers to the Internet of things terminal equipment executing network searching, cell residence and cell registration processes, preparing to initiate or respond to services, and establishing uplink and downlink communication links with a network end; or in the service proceeding and link maintaining stage; the standby state S1 means that the terminal equipment of the Internet of things maintains a standby state, the processor stops working, and other components maintain working; the standby state S1 defines a standby period;
step S620: in the awakening period of each standby period, the terminal equipment of the Internet of things intercepts paging messages, or implements wireless signal measurement, or receives system broadcast messages; if no other event needs to be processed later, the terminal equipment of the internet of things enters a first sleep period in the remaining time of the standby period until the next standby period begins, and the steps are repeated;
step S630: when the terminal equipment of the Internet of things maintains N in the standby state S1S2After one standby period, namely reaching the long standby waiting period, entering a long standby state S2; the long standby state S2 means that the processor, the external device and the bus clock of the terminal device of the Internet of things stop working, the power management unit, the timer group and the external interrupt response unit are kept in standby state, and waiting for the event to trigger and wake up; the long standby state S2 defines a long standby period;
step S640: during the long standby waiting period of each long standby period, executing according to step S620 to step S630; if no other event needs to be processed later, the terminal equipment of the internet of things enters a second sleep period in the remaining time of the long standby period until the next long standby period begins, and the steps are repeated; the length of the second sleep period is greater than the length of the first sleep period;
step S650: when the terminal equipment of the Internet of things maintains N in the long standby state S2S3After a long standby period, namely a deep sleep waiting period is reached, entering a deep sleep state S3; the deep sleep state S3 means that the terminal equipment of the internet of things writes the memory data into the nonvolatile memory, and other system components except the timer group and the external interrupt response unit stopWorking; the deep sleep state S3 defines a deep sleep cycle;
step S660: in the deep sleep waiting period of each deep sleep cycle, the steps from S640 to S650 are performed; if no other event needs to be processed later, the internet of things terminal equipment enters a third sleep period in the remaining time of the deep sleep period until the next deep sleep period begins, and the steps are repeated; the length of the third sleep period is far longer than that of the second sleep period, and far longer than that of the second sleep period by more than or equal to 10 times.
15. The sleep control method for the terminal of the internet of things of claim 14, wherein the steps S610 to S620 specifically include:
step S710: after the service of the terminal equipment of the internet of things in the active state S0 is completed or the link is released, entering a standby state S1;
step S720: in the standby state S1, the terminal device of the internet of things first enters an awake period, and in the awake period, the terminal device of the internet of things performs an awake operation, including listening for a paging message, or performing wireless signal measurement, or receiving a system broadcast message, or synchronizing timing, or synchronizing registration information with a network;
step S730: after the terminal equipment of the Internet of things executes the awakening operation, if no other event needs to be processed, the terminal equipment enters a first sleep period in the remaining time of the standby period, and starts the timing of the first sleep period;
step S740: when the timing of the first sleep period is reached, the internet of things terminal device enters the standby state S1 for the next standby period, and returns to step S720.
16. The sleep control method for the terminal of the internet of things as claimed in claim 15, wherein in the standby state S1, once the terminal of the internet of things is triggered by a paging event, or the terminal of the internet of things actively establishes a connection with the network, or an external interrupt response event, the terminal of the internet of things immediately wakes up, exits from the standby state S1, enters the active state S0, and establishes a paging or link, initiates or responds to a service.
17. The sleep control method of the terminal of the internet of things as claimed in claim 15, wherein, once the terminal of the internet of things in the standby state S1 receives the power-off command and performs the de-registration process with the network, if there is no event currently being performed, the terminal device of the internet of things directly enters the power-off state S4; the shutdown state S4 means that the terminal equipment of the Internet of things is shut down and is not powered on; if some events which are being executed exist currently, the terminal device of the internet of things enters the active state S0 to immediately terminate the events, exits the active state S0 after the events are terminated, and enters the power-off state S4.
18. The sleep control method for the terminal of the internet of things of claim 14, wherein the steps S630 to S640 specifically include:
step S810: when the terminal equipment of the Internet of things maintains N in the standby state S1S2After one standby period, namely reaching the long standby waiting period, entering a long standby state S2;
step S820: during the long standby waiting period of each long standby period, executing according to step S620 to step S630;
step S830: after the long standby waiting period is ended, if no other event needs to be processed later, the terminal equipment of the internet of things enters a second sleep period in a long standby state S2 in the remaining time of the long standby period, and the timing of the second sleep period is started;
step S840: when the timing of the second sleep period is reached, the terminal device of the internet of things enters the next long standby period of the long standby state S2, and the process returns to step S820.
19. The sleep control method for the terminal of the internet of things as claimed in claim 18, wherein in the long standby state S2, once the terminal device of the internet of things is triggered by a paging event, or the terminal device of the internet of things actively establishes a connection with a network, or an external interrupt response event, the terminal device of the internet of things immediately wakes up, exits from the long standby state S2, enters the active state S0, and establishes a paging or link, initiates or responds to a service.
20. The sleep control method for the terminal of the internet of things as claimed in claim 14, wherein the steps S650 to S660 specifically include:
step S910: when the terminal equipment of the Internet of things maintains N in the long standby state S2S3After a long standby period, namely a deep sleep waiting period is reached, entering a deep sleep state S3;
step S920: in the deep sleep waiting period of each deep sleep cycle, the steps from S640 to S650 are performed;
step S930: after the deep sleep waiting period is ended, if no other event needs to be processed, the terminal equipment of the internet of things enters a third sleep period in a deep sleep state S3 in the remaining time of the deep sleep period, and the timing of the third sleep period is started;
step S940: when the timing of the third sleep period is reached, the terminal device of the internet of things enters the next deep sleep cycle of the deep sleep state S3, and the process returns to step S920.
21. The sleep control method for the terminal of the internet of things of claim 20, wherein in the deep sleep state S3, once the terminal device of the internet of things is triggered by an active connection with the network or an external interrupt response event, the terminal device of the internet of things will wake up immediately, exit from the deep sleep state S3, enter the active state S0, and establish a link, initiate or respond to a service.
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