Low-power-consumption wireless awakening method and device for tag chip

Abstract

The invention provides a low-power-consumption wireless wake-up method and device for a tag chip, the tag chip comprises a wake-up module, and a unified identification code is pre-stored in the tag chip; the method comprises the following steps: in a group wake-up scene, transmitting a unified beacon signal to at least one tag chip in a dormant state through a transmitter; the tag chip demodulates and decodes the unified beacon signal through the wake-up module to obtain a unified identification code carried in the unified beacon signal; and the awakening module performs consistency comparison on the received unified identification code and a unified identification code pre-stored in the tag chip, and if the received unified identification code is consistent with the unified identification code pre-stored in the tag chip, the tag chip is awakened. According to the method, only the function of the wake-up module of the tag chip needs to be improved, and external hardware does not need to be configured, so that the whole system is simple in structure and easy to implement.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a low-power wireless wake-up method and device for a tag chip. Background Art

[0002] Common tag chip wakeup methods include external interrupt wakeup (such as button presses), timer wakeup, and input interrupt wakeup. External and input interrupt wakeup typically implement the wakeup function through button presses or GPIO inputs, requiring additional hardware support, increasing hardware complexity and dependency. These methods also consume high power. Timer wakeup typically uses a timer to send broadcast signals at regular intervals. This makes it difficult to achieve a one-to-one correspondence between tag-sent signals and receivers, limiting flexibility and increasing system complexity. Summary of the Invention

[0003] Purpose of the invention: The present invention aims to provide a low-power wireless wake-up method and device for a tag chip, so as to at least partially overcome the defects of the prior art.

[0004] Summary of the invention: To achieve the above objectives, the present invention proposes the following technical solutions: In a first aspect, a low-power wireless wake-up method for a tag chip is provided, wherein the tag chip includes a wake-up module and a unified identification code is pre-stored in the tag chip; the method includes the following steps: In the group awakening scenario, a unified beacon signal is transmitted to at least one tag chip in a dormant state through a transmitter; the tag chip demodulates and decodes the unified beacon signal through the awakening module to obtain a unified identification code carried in the unified beacon signal; the awakening module compares the received unified identification code with the unified identification code pre-stored in the tag chip for consistency, and if they are consistent, the tag chip is awakened.

[0005] As an optional implementation manner of the method of the first aspect, the method includes: In a single wake-up scenario, if the transmitter pre-stores a unique identifier of the target tag chip, a roll call signal is sent to at least one tag chip in a dormant state through the transmitter, and the roll call signal is obtained by encoding the unique identifier of the target tag chip by the transmitter; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, the current tag chip is woken up.

[0006] Specifically, the method includes: in a single wake-up scenario, if the transmitter does not obtain the unique identifier of the target tag chip, performing group wake-up on at least one tag chip in a dormant state through the transmitter; after being woken up, the tag chip switches to a normal working state and returns a unique identifier to the transmitter; The transmitter determines the unique identifier of the target tag chip according to the received unique identifier; The transmitter sends a roll call signal to at least one of the tag chips in a dormant state, where the roll call signal is obtained by encoding the unique identifier of the target tag chip by the transmitter; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, wakes up the current tag chip.

[0007] As an optional implementation of the method described in the first aspect, the wake-up module includes a demodulation module and a digital decoding module; the demodulation module is used to demodulate the received signal; and the digital decoding module is used to decode the demodulated signal.

[0008] As an optional implementation scheme of the method described in the first aspect, the tag chip includes an analog front end, a digital baseband and the wake-up module; when the tag chip is in a sleep state, only the wake-up module is in a normal working state, and the analog front end and the digital baseband are in a sleep state; when the wake-up module wakes up the tag chip, the analog front end and the digital baseband switch to a normal working state.

[0009] In a second aspect, a low-power wireless wake-up device for a tag chip is provided, comprising a transmitter and the tag chip, wherein the tag chip includes a wake-up module and a unified identification code is pre-stored in the tag chip; In the group awakening scenario, the transmitter transmits a unified beacon signal to at least one of the tag chips in sleep state; the tag chip demodulates and decodes the unified beacon signal through the awakening module to obtain the unified identification code carried in the unified beacon signal; the awakening module compares the received unified identification code with the unified identification code pre-stored in the tag chip for consistency, and if they are consistent, the tag chip is awakened.

[0010] As an optional implementation of the device described in the second aspect, in a separate wake-up scenario, if the transmitter pre-stores a unique identifier of the target tag chip, the transmitter sends a roll call signal to at least one of the tag chips in a sleep state, and the roll call signal is obtained by the transmitter encoding the unique identifier of the target tag chip; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, the current tag chip is woken up.

[0011] Specifically, in a single wake-up scenario, if the transmitter does not obtain the unique identifier of the target tag chip, the transmitter performs a group wake-up on at least one tag chip in a dormant state; the tag chip is configured to enter a normal working state after being woken up and return a unique identifier to the transmitter; The transmitter determines the unique identifier of the target tag chip according to the received unique identifier; The transmitter sends a roll call signal to at least one of the tag chips in a dormant state, where the roll call signal is obtained by encoding the unique identifier of the target tag chip by the transmitter; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, wakes up the current tag chip.

[0012] As an optional implementation of the method described in the first aspect, the wake-up module includes a demodulation module and a digital decoding module; the demodulation module is used to demodulate the received signal; and the digital decoding module is used to decode the demodulated signal.

[0013] As an optional implementation scheme of the method described in the first aspect, the tag chip includes an analog front end, a digital baseband and the wake-up module; when the tag chip is in a sleep state, only the wake-up module is in a normal working state, and the analog front end and the digital baseband are in a sleep state; when the wake-up module wakes up the tag chip, the analog front end and the digital baseband switch to a normal working state.

[0014] Beneficial effects: Compared with the prior art, the low-power wireless wake-up method and device for the tag chip proposed in the present invention have the following advantages: This method only requires improving the function of the wake-up module of the tag chip, without configuring external hardware, making the entire system structure simple and easy to implement.

[0015] In this method, only the wake-up signal sent by the transmitter needs to be modified to realize group wake-up or individual wake-up of the tag chips, which can meet the wake-up requirements of different scenarios and has strong flexibility.

[0016] In this method, the tag chip only needs to keep the wake-up module working normally during the entire wake-up process, and the wake-up power consumption is low.

[0017] The low-power wireless wake-up device for the tag chip proposed in the present invention also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a flowchart of a low-power wireless wake-up method for a tag chip in a group wake-up scenario involved in an embodiment.

[0019] Figure 2 The figure is a schematic structural diagram of a tag chip involved in the embodiment.

[0020] Figure 3 This is a structural diagram of a wake-up module involved in an embodiment.

[0021] Figure 4 The figure is a flow chart of a low-power wireless wake-up method for a tag chip in a single wake-up scenario according to an embodiment.

[0022] Figure 5 The figure is a schematic structural diagram of a low-power wireless wake-up device for a tag chip according to an embodiment. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should be understood that the present invention may be implemented in various forms, and the following exemplary and non-limiting embodiments shown in the drawings and described below are not intended to limit the present invention to the specific embodiments described.

[0024] It should be understood that, where technically feasible, the technical features listed above for different embodiments may be combined with each other to form additional embodiments within the scope of the present invention. In addition, the specific examples and embodiments described in the present invention are non-limiting, and the structures, steps, and sequences described above may be modified accordingly without departing from the scope of protection of the present invention.

[0025] This embodiment aims to address the shortcomings of existing chip wake-up solutions and provide a low-power wireless wake-up method and device for a tag chip, so as to at least partially overcome the technical defects of existing chip wake-up solutions.

[0026] Please refer to Figure 1 , Figure 1A flowchart of a low-power wireless wakeup method for a tag chip in a group wakeup scenario is provided as an example. The tag chip includes a wakeup module and a unified identification code is pre-stored in the tag chip. The method includes steps S100 to S104.

[0027] S100: transmitting a unified beacon signal to at least one tag chip in a dormant state via a transmitter.

[0028] Please refer to Figure 2 The tag chip mentioned above may include a wake-up module, an analog front end, and a digital baseband. Figure 3 As shown in the figure, the wake-up module includes a demodulation module and a digital decoding module. When the tag chip is in sleep mode, only the wake-up module remains in normal operation, while the analog front end and digital baseband are in sleep mode. When the tag is operating normally, the analog front end exchanges data with the transmitter through the digital baseband.

[0029] It should be noted that the specific structure and functions of the above-mentioned tag chip can be set according to needs, but it must include the above-mentioned wake-up module.

[0030] Before transmitting the unified beacon signal, the transmitter generates the above-mentioned unified beacon signal according to the unified identification code of the tag group to be awakened.

[0031] S102: The tag chip demodulates and decodes the unified beacon signal through the wake-up module to obtain the unified identification code carried in the unified beacon signal.

[0032] Still Figure 2 and Figure 3 Taking the tag chip structure shown as an example, the unified beacon signal can be demodulated by the demodulation module of the wake-up module, and then the demodulated unified beacon signal can be decoded by the digital decoding module of the wake-up module to finally obtain the unified identification code carried in the unified beacon signal.

[0033] S104: The wake-up module compares the received unified identification code with the unified identification code pre-stored in the tag chip for consistency. If they are consistent, the tag chip is woken up.

[0034] The above-mentioned unified identification code can be pre-written in the tag chip. If the tag chip has a memory, the unified beacon signal can be stored in the memory. If the tag chip does not have a memory, the unified identification code can be stored in the register of the wake-up module.

[0035] The above unified identification code can be written, deleted and modified to adapt to different scenario requirements.

[0036] When the wake-up module obtains the unified identification code, it compares the unified identification code with the currently stored unified identification code for consistency. If the two are consistent, the wake-up module wakes up the tag chip. If the two are inconsistent, the wake-up module does not send a wake-up signal and the tag chip continues to maintain a dormant state.

[0037] It should be noted that the form of the above-mentioned unified identification code can be set according to needs, and this embodiment does not impose any limitation on this.

[0038] Based on the above method, this embodiment also provides a low-power wireless wake-up method for a tag chip in a single wake-up scenario. Please refer to Figure 4 , Figure 4 The flowchart of a low-power wireless wake-up method for a tag chip in a single wake-up scenario is schematically shown. The method includes steps S400 to S406.

[0039] S400: The transmitter obtains the unique identifier of the target tag chip.

[0040] The target tag chip mentioned above refers to the tag chip that the transmitter needs to wake up, and the unique identifier of the target tag chip refers to the unique identity of the target tag chip.

[0041] In a specific implementation, the EPC of the tag chip can be selected as the unique identifier of the tag chip. Of course, the unique identifier can also be selected from other parameters of the tag chip, or can be written from the outside to the tag chip, which is not limited in this embodiment.

[0042] The transmitter obtains the unique identifier of the target tag chip, which can be directly read from the external controller. Alternatively, the tag chip group can be collectively awakened first. The specific steps of collective awakening can refer to the above steps S100 to S104, which will not be repeated in this step.

[0043] After being awakened, these tag chips enter normal working state and return a unique identifier to the transmitter. The transmitter can select one of the multiple unique identifiers received after the group wakes up as the unique identifier of the target tag chip.

[0044] S402: Send a roll call signal to at least one tag chip in a dormant state via a transmitter.

[0045] After obtaining the unique identifier of the target tag chip, the transmitter encodes the unique identifier of the target tag chip to obtain the above-mentioned roll call signal. Then, the transmitter sends the roll call signal to at least one tag chip in the dormant state.

[0046] S404: The tag chip demodulates and decodes the roll call signal through the wake-up module to obtain a unique identifier carried in the roll call signal.

[0047] Specifically, the tag chip can demodulate the roll call signal through the demodulation module of the wake-up module, and then decode the demodulated roll call signal through the digital decoding module of the wake-up module to finally obtain the unique identifier carried in the roll call signal.

[0048] S406: The wake-up module compares the received unique identifier with the unique identifier of the tag chip for consistency. If they are consistent, the tag chip is woken up.

[0049] After the wake-up module obtains the unique identifier, it compares the unique identifier with the unique identifier stored in the tag chip for consistency. If the two are consistent, the wake-up module wakes up the tag chip. If the two are inconsistent, the wake-up module does not send a wake-up signal and the tag chip continues to maintain a dormant state.

[0050] Corresponding to the low-power wireless wake-up method of the tag chip, this embodiment also provides a low-power wireless wake-up device for the tag chip, which is used to implement the low-power wireless wake-up method of the tag chip. Figure 5 , Figure 5 The following schematically shows a structural diagram of a low-power wireless wake-up device for a tag chip. Figure 5 As shown, the device includes: a transmitter and a tag chip. The tag chip includes a wake-up module, and a unified identification code is pre-stored in the tag chip.

[0051] In a group wakeup scenario, the transmitter transmits a unified beacon signal to at least one tag chip in a dormant state. The tag chip uses the wakeup module to demodulate and decode the unified beacon signal, obtaining the unified identification code carried in the signal. The wakeup module compares the received unified identification code with the unified identification code pre-stored in the tag chip. If they match, the tag chip wakes up.

[0052] In a single wakeup scenario, if the transmitter has pre-stored the unique identifier of the target tag chip, it sends a roll call signal to at least one tag chip in a dormant state. The roll call signal is obtained by encoding the unique identifier of the target tag chip in the transmitter. The tag chip uses the wakeup module to demodulate and decode the roll call signal to obtain the unique identifier carried in the roll call signal. The wakeup module compares the received unique identifier with the unique identifier of the tag chip itself and wakes up the tag chip if they match.

[0053] In a single wake-up scenario, if the transmitter does not obtain the unique identifier of the target tag chip, it performs a group wake-up on at least one tag chip in a dormant state. After being awakened, the tag chip enters normal operation and returns a unique identifier to the transmitter. The transmitter determines the unique identifier of the target tag chip based on the received unique identifier. The transmitter sends a roll call signal to at least one dormant tag chip. The roll call signal is obtained by encoding the unique identifier of the target tag chip. The tag chip uses the wake-up module to demodulate and decode the roll call signal, obtaining the unique identifier carried in the roll call signal. The wake-up module compares the received unique identifier with the unique identifier of the tag chip itself and wakes up the tag chip if they match.

[0054] Specifically, the above-mentioned wake-up module includes a demodulation module and a digital decoding module. In the group wake-up scenario, the demodulation module is used to demodulate the unified beacon signal, and the digital decoding module is used to decode the demodulated unified beacon signal. In the individual wake-up scenario, if the transmitter already knows the unique identifier of the target tag chip, the demodulation module is used to demodulate the roll call signal, and the digital decoding module is used to decode the demodulated roll call signal. In the individual wake-up scenario, if the transmitter does not know the unique identifier of the target tag chip, the transmitter needs to first execute the group wake-up process, and then execute the single tag wake-up process. In this scenario, the demodulation module is used to demodulate the unified beacon signal and the roll call signal, and the digital decoding module is used to decode the demodulated unified beacon signal and the roll call signal.

[0055] Specifically, the tag chip includes an analog front end, a digital baseband, and a wake-up module. When the tag chip is in sleep mode, only the wake-up module is in normal operation, while the analog front end and digital baseband are in sleep mode. When the wake-up module wakes up the tag chip, the analog front end and digital baseband return to normal operation.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A low-power wireless wake-up method for a tag chip, characterized in that: The tag chip includes a wake-up module, and a unified identification code is pre-stored in the tag chip; the method includes the steps of: In a group awakening scenario, a unified beacon signal is transmitted to at least one tag chip in a dormant state through a transmitter; The tag chip demodulates and decodes the unified beacon signal through the wake-up module to obtain a unified identification code carried in the unified beacon signal; The wake-up module compares the received unified identification code with the unified identification code pre-stored in the tag chip for consistency, and wakes up the tag chip if they are consistent.

2. The method according to claim 1, characterized in that The method comprises: In a single wake-up scenario, if the transmitter pre-stores a unique identifier of the target tag chip, a roll call signal is sent to at least one tag chip in a dormant state through the transmitter, and the roll call signal is obtained by encoding the unique identifier of the target tag chip by the transmitter; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, the current tag chip is woken up.

3. The method according to claim 2, characterized in that The method comprises: In a single wake-up scenario, if the transmitter fails to obtain the unique identifier of the target tag chip, the transmitter performs group wake-up on at least one tag chip in a dormant state; after being woken up, the tag chip switches to a normal working state and returns a unique identifier to the transmitter; The transmitter determines the unique identifier of the target tag chip according to the unique identifier received after the group wakes up; The transmitter sends a roll call signal to at least one of the tag chips in a dormant state, where the roll call signal is obtained by encoding the unique identifier of the target tag chip by the transmitter; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, wakes up the current tag chip.

4. The method according to claim 1, wherein The wake-up module includes a demodulation module and a digital decoding module; the demodulation module is used to demodulate the received signal; and the digital decoding module is used to decode the demodulated signal.

5. The method according to claim 1, wherein The tag chip includes an analog front end, a digital baseband and the wake-up module; when the tag chip is in a sleep state, only the wake-up module is in a normal working state, and the analog front end and the digital baseband are in a sleep state; when the wake-up module wakes up the tag chip, the analog front end and the digital baseband return to a normal working state.

6. A low-power wireless wake-up device for a tag chip, characterized in that: It includes a transmitter and the tag chip, the tag chip includes a wake-up module, and the tag chip is pre-stored with a unified identification code; In the group awakening scenario, the transmitter transmits a unified beacon signal to at least one of the tag chips in sleep state; the tag chip demodulates and decodes the unified beacon signal through the awakening module to obtain the unified identification code carried in the unified beacon signal; the awakening module compares the received unified identification code with the unified identification code pre-stored in the tag chip for consistency, and if they are consistent, the tag chip is awakened.

7. The device according to claim 6, characterized in that In a single wake-up scenario, if the transmitter pre-stores a unique identifier of the target tag chip, the transmitter sends a roll call signal to at least one of the tag chips in a dormant state, where the roll call signal is obtained by encoding the unique identifier of the target tag chip by the transmitter; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, the current tag chip is woken up.

8. The device according to claim 7, characterized in that In a single wake-up scenario, if the transmitter fails to obtain the unique identifier of the target tag chip, the transmitter performs group wake-up on at least one tag chip in a dormant state; after being woken up, the tag chip switches to a normal working state and returns a unique identifier to the transmitter; The transmitter determines the unique identifier of the target tag chip according to the received unique identifier; The transmitter sends a roll call signal to at least one of the tag chips in a dormant state, where the roll call signal is obtained by encoding the unique identifier of the target tag chip by the transmitter; the tag chip demodulates and decodes the roll call signal through the wake-up module to obtain the unique identifier carried in the roll call signal; the wake-up module compares the received unique identifier with the unique identifier of the current tag chip for consistency, and if they are consistent, wakes up the current tag chip.

9. The device according to claim 6, characterized in that The wake-up module includes a demodulation module and a digital decoding module; the demodulation module is used to demodulate the received signal; and the digital decoding module is used to decode the demodulated signal.

10. The device according to claim 6, characterized in that The tag chip includes an analog front end, a digital baseband and the wake-up module; when the tag chip is in a sleep state, only the wake-up module is in a normal working state, and the analog front end and the digital baseband are in a sleep state; when the wake-up module wakes up the tag chip, the analog front end and the digital baseband return to a normal working state.

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