WO2023226325A1

WO2023226325A1 - Uwb communication method, and chip and device

Info

Publication number: WO2023226325A1
Application number: PCT/CN2022/132297
Authority: WO
Inventors: 王大耀
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2022-05-27
Filing date: 2022-11-16
Publication date: 2023-11-30
Also published as: CN115002660A; CN115002660B

Abstract

Provided in the present application are a UWB communication method, and a chip and a device. The method can be applied to a ranging device, and comprises: a ranging device performing UWB ranging communication with a device to be subjected to ranging; after the ranging communication is finished, the ranging device generating a transaction wake-up message according to a ranging communication result, and sending, within a transaction wake-up time, the transaction wake-up message to the device to be subjected to ranging, so as to keep same in an awake state; and according to a transaction communication parameter comprised in the transaction wake-up message, the ranging device performing, by means of a UWB, transaction communication with the device to be subjected to ranging. In the technical solution, after a ranging stage, the ranging device can directly transmit, by means of the UWB, transaction data to the device to be subjected to ranging, such that transaction communication based on UWB technology is realized, and there is no need to make a transaction by means of other wireless communication technology, thereby greatly improving the efficiency and success rate of a transaction; in addition, a user does not need to cause the device to be subjected to ranging to physically approach the ranging device, such that rapid unconscious payment or card swiping can be realized, thereby greatly improving user experience.

Description

UWB communication method, chip and equipment

This application claims priority for the Chinese invention patent application with the filing date of May 27, 2022, the application number "202210597534.1", and the patent name "UWB communication method, chip and equipment", the entire content of which is hereby incorporated by reference.

Technical field

The embodiments of the present application relate to the field of communication technology, and more specifically, to a UWB (Ultra Wide Band) communication method, chip and device.

Background technique

UWB ultra-wideband technology is a wireless carrier communication technology that does not use sinusoidal carrier waves, but uses nanosecond-level non-sinusoidal narrow pulses to transmit data, so it occupies a wide spectrum range. UWB technology has the advantages of low system complexity, low transmit signal power spectrum density, insensitivity to channel fading, and high positioning accuracy. It is especially suitable for high-speed wireless access in densely populated places such as indoors. However, the current relevant standards and specifications of UWB only stipulate the use of UWB for distance measurement. Therefore, how to transmit transaction data through UWB technology has become a problem that needs to be solved.

Contents of the invention

Embodiments of the present application provide a UWB communication method, chip and equipment to solve the problem in the existing technology that transaction communication cannot be performed through UWB technology.

In the first aspect, a UWB communication method is provided, which is applied to ranging equipment. The method includes:

The ranging device performs UWB ranging communication with the device under test;

After the ranging communication ends, the ranging device generates a transaction wake-up message based on the ranging communication results, and sends a transaction wake-up message to the device under test within the transaction wake-up time to keep it awake; and,

The ranging device conducts transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message.

In the embodiment of this application, after the ranging device and the device under test complete the ranging communication, the ranging device sends a transaction wake-up message to the ranging device within the transaction wake-up time to keep it awake, and communicates through the transaction contained in the message. Parameters communicate with the device under test via UWB. Compared with traditional UWB ranging, the ranging device can directly transmit transaction data with the device under test through UWB after the ranging phase, realizing transaction communication under UWB technology, without the need to conduct transactions through other wireless communication technologies, ensuring The consistency and reliability of data interaction greatly improve the efficiency and success rate of transactions and save hardware costs. At the same time, because UWB technology has a relatively large communication distance and high sensitivity, users do not have to physically bring the device under test close to the distance measuring device, thus enabling fast and non-sensitive payment or card swiping, which greatly improves the user experience.

In one implementation, the transaction wake-up message includes the transaction device address;

The ranging device generates a transaction wake-up message based on the ranging communication results, and sends a transaction wake-up message to the device under test within the transaction wake-up time to keep it awake, including:

When the distance between the device under test and the ranging device is less than or equal to the preset distance threshold and is the closest to the ranging device, the ranging device adds the address of the device under test as the transaction device address to the transaction wake-up message, and in Send the transaction wake-up message within the transaction wake-up time;

After sending a transaction wake-up message to the device under test within the transaction wake-up time, the method includes:

The device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time, determines that the transaction device address in the transaction wake-up message matches its own address, and then remains awake.

In one implementation, the transaction communication parameters include: transaction duration; after the ranging device conducts transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The ranging device enters the ranging protection time after the transaction time and remains silent.

In one implementation, the transaction communication parameters include: response timeout duration and the number of retransmissions; the ranging protection time length is the response timeout duration multiplied by the number of retransmissions.

In one implementation, the ranging device conducts transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message, including:

The ranging device determines whether the transaction duration has expired. If not, it sends a transaction message to the device under test. If so, it suspends sending transaction messages to the device under test;

After the ranging device conducts transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The ranging device performs the next UWB ranging communication with the device to be tested, and enters the next transaction wake-up time after the next UWB ranging communication. After the next transaction wake-up time, the ranging device continues to communicate with the device to be tested. The test device sends transaction messages.

During the transaction communication process, when the ranging interval expires, the ranging device will not perform UWB ranging communication and continue to conduct transaction communication with the device under test;

The ranging device sends a transaction end notification to the device under test so that the device under test enters a low power consumption state. The ranging device enters the low power consumption state and communicates with the device under test when the ranging interval expires. Next time UWB ranging communication.

In the second aspect, a UWB communication method is provided and applied to the device under test. The method includes:

The device under test conducts UWB ranging communication with the ranging device;

After the ranging communication ends, the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time and remains awake; the transaction wake-up message is generated by the ranging device based on the ranging communication result; and ,

The device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message.

In the embodiment of this application, after the device under test and the ranging device complete the ranging communication, the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time to remain awake, and communicates through the transaction contained in the message. Parameters and ranging devices communicate via UWB. Compared with traditional UWB ranging, the device under test can directly transmit transaction data with the ranging device through UWB after the ranging stage, realizing transaction communication under UWB technology, without the need to conduct transactions through other wireless communication technologies, ensuring The consistency and reliability of data interaction greatly improve the efficiency and success rate of transactions and save hardware costs. At the same time, because UWB technology has a relatively large communication distance and high sensitivity, users do not have to physically bring the device under test close to the distance measuring device, thus enabling fast and non-sensitive payment or card swiping, which greatly improves the user experience.

Before the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time, the method includes:

After the ranging communication ends, when the distance between the device under test and the ranging device is less than or equal to the preset distance threshold and the distance to the ranging device is the closest, the ranging device adds the address of the device under test as the transaction device address to in the transaction wake-up message and send the transaction wake-up message within the transaction wake-up time;

The device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time and remains awake, including:

In one implementation, the transaction communication parameters include: transaction duration; after the device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The device under test enters the ranging protection time after the transaction time and remains silent.

In one implementation, the device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message, including:

The device under test determines whether the transaction duration has expired. If not, it sends transaction data to the ranging device. If so, it suspends sending transaction data to the ranging device;

After the device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The device under test conducts the next UWB ranging communication with the ranging device, and enters the next transaction wake-up time after the next UWB ranging communication. After the next transaction wake-up time, the device under test continues to send signals to the ranging device. Ranging devices send transaction data.

During the transaction communication process, when the ranging interval expires, the device under test will not perform UWB ranging communication and continue to conduct transaction communication with the ranging device;

The device under test enters a low power consumption state after receiving the transaction end notification sent by the ranging device, and conducts the next UWB ranging communication with the ranging device when the ranging interval expires.

In the third aspect, a UWB chip is provided for use in ranging equipment. The chip includes:

Communication module, used for UWB ranging communication with the device under test;

An operation module configured to generate a transaction wake-up message based on the ranging communication result after the ranging communication ends, and send a transaction wake-up message to the device under test within the transaction wake-up time to keep it awake; and,

The communication module is also used to conduct transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message.

In the fourth aspect, a UWB chip is provided and applied to the device under test. The chip includes:

Communication module, used for UWB ranging communication with ranging equipment;

An operation module, configured to receive a transaction wake-up message sent by the ranging device within the transaction wake-up time after the ranging communication ends and maintain the awake state; the transaction wake-up message is generated by the ranging device based on the ranging communication result; as well as,

The communication module is also used to conduct transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message.

A fifth aspect provides a UWB ranging device, which includes the UWB chip according to the third aspect.

A sixth aspect provides a UWB device under test, which includes a UWB chip according to the fourth aspect, and a security element.

Description of the drawings

Figure 1 is a schematic flowchart of a UWB communication method according to an embodiment of the present application.

Figure 2 is a schematic diagram of equipment timing status according to the embodiment of the present application.

Figure 3 is a schematic diagram of another device timing status according to an embodiment of the present application.

Figure 4 is another device timing status diagram according to an embodiment of the present application.

Figure 5 is a schematic flowchart of another UWB communication method according to an embodiment of the present application.

Figure 6 is a schematic structural diagram of a UWB chip according to an embodiment of the present application.

Figure 7 is a schematic structural diagram of another UWB chip according to an embodiment of the present application.

Figure 8 is a schematic structural diagram of another UWB chip according to an embodiment of the present application.

Figure 9 is a schematic structural diagram of a UWB ranging device provided by an embodiment of the present application.

Figure 10 is a schematic structural diagram of a UWB device under test provided by an embodiment of the present application.

Detailed ways

The technical solutions in this application will be described below with reference to the accompanying drawings.

UWB-related standards organizations (such as the FiRa Alliance) stipulate specifications for using UWB for ranging. Through these specifications, high-precision distance measurement, target positioning, etc. under UWB technology can be achieved. Especially in more complex environments, UWB technology can be used in Outperforms other technologies in terms of accuracy, power consumption, robustness and security of RF signal connections.

According to the specification requirements, UWB devices need to send data within a time slot (slot), and other UWB devices can receive the data. To avoid collisions, only one UWB device can send data within a time slot. In order to reduce power consumption, UWB devices cannot be in the sending and receiving state at all times. Therefore, when the device does not need data interaction, it is in a low power consumption state (IDLE state). In this state, the device cannot send and receive data. The device can enter the receiving or sending state through scheduled wake-up. . For example, during the ranging phase, the UWB device is in the transmitting and receiving state. In the non-ranging phase after the ranging is completed, the device is usually in a low power consumption state and cannot perform ranging communication until the agreed time point.

The above-mentioned UWB equipment generally includes ranging equipment and equipment under test. The ranging device needs to send different ranging frames in different time slots and receive response messages returned by the device under test to complete UWB ranging. In some daily transaction scenarios, such as access control card swiping, bus and subway card swiping, or POS machine consumption scenarios, it is usually necessary for the ranging device and the device to be tested to perform ranging first, and then conduct transactions when the ranging data reaches a certain value range. However, the specification only defines a time slot-based solution in the ranging phase, and does not provide a corresponding communication mechanism for how to conduct transactions through UWB technology after ranging.

To this end, embodiments of the present application provide a UWB communication solution that can realize transaction communication under UWB technology.

Figure 1 shows a schematic flowchart of a UWB communication method 100 according to an embodiment of the present application. The method 100 can be applied to the above ranging device, that is, it can be executed by the ranging device. As an example but not a limitation, the ranging device may be an access control device, a gate, a POS terminal device, or other card reading device with UWB function. Correspondingly, the device to be tested can specifically be various types of chip cards (such as bus cards, access cards, bank cards, etc.), mobile terminal devices, wearable devices, tablets or other card simulation devices with UWB functions, etc. These devices under test generally have SE (Secure Element), which stores transaction-related applications (such as bus apps or payment apps) and transaction information. During the specific transaction communication process, these applications can use UWB technology Interaction of transaction information with ranging devices. As shown in Figure 1, the method includes the following steps:

Step 110: The ranging device performs UWB ranging communication with the device under test.

In a specific application scenario, there may be multiple devices under test communicating with the ranging device for UWB ranging. As mentioned above, after the ranging device broadcasts the ranging message in a time slot, it will receive the ranging message returned by each device under test. Response message, based on which the ranging device can accurately determine the distance between the device to be measured and the ranging device.

Figure 2 is a schematic diagram of equipment timing status provided by an embodiment of the present application. The ranging device can perform 5 time slot ranging communications with the device under test as shown in the figure. Of course, the specific number of ranging communication time slots will vary with the number of devices under test and the ranging method and is not fixed. After that, the ranging device and the device under test conduct UWB ranging communication required by the specification every certain ranging interval. Figure 2 shows two ranging intervals. In actual applications, there may be more ranging intervals. The ranging interval can be flexibly determined by the application layer according to actual conditions, and the specific time range can be from 100ms to several seconds, which is not limited in this application.

Step 120: After the ranging communication ends, the ranging device generates a transaction wake-up message according to the ranging communication result, and sends the transaction wake-up message to the device under test within the transaction wake-up time to keep it awake.

Specifically, the transaction wake-up message may include a transaction device address, which is used to identify the target device under test that requires transaction communication. When the distance between the device under test and the ranging device is less than or equal to the preset distance threshold and the distance to the ranging device is the closest, the ranging device adds the address of the device under test as the transaction device address to the transaction wake-up message, and in the transaction Send the transaction wake-up message within the wake-up time. It is understandable that the above preset distance threshold can be flexibly set according to the application scenario. For example, it can be larger when paying by swiping a card at a subway gate, and smaller when paying at a POS machine. The specific value can be 0.1m-2m. This application There are no restrictions on this.

As shown in Figure 2, the above transaction wake-up time is two time slots immediately after the ranging communication stage. The number of time slots included in the transaction wake-up time can be set flexibly. Generally speaking, one time slot is enough. However, in order to ensure that the target device under test can be correctly awakened to enter the transaction state, the above-mentioned transaction wake-up time can be set to multiple time slots. , a preferred number is 2-4 time slots. This can avoid the problem that once the target device under test fails to wake up in one time slot, it must wake up at the next transaction wake-up time, resulting in a decrease in transaction communication efficiency.

Specifically, the transaction wake-up message can include transaction communication parameters, which can be flexibly configured by the application layer (such as a bus app or payment app) according to actual conditions. This parameter includes but is not limited to: response timeout length, number of retransmissions, etc. The response timeout period is used to specify how long a response message must be received from the peer device after sending data or control messages to the peer device, otherwise the data or control message will be deemed to have failed to be sent. The number of retransmissions indicates the number of times the message needs to be sent again when the data or control message fails to be sent. Further, the transaction communication parameters may include: data packet size, which is used to specify the maximum data packet size carried in a data message sent at one time. In order to ensure that transaction communication does not affect the timing and ranging communication specified in the specification, the transaction communication parameters may include: transaction duration. Referring to Figure 2, the transaction duration is the length of the transaction communication time shown in the figure. Since the ranging device and the device under test are in a one-to-one communication state during the transaction communication time, the transaction duration does not need to follow the provisions of the standard time slot and can be set flexibly. However, the ranging communication time, transaction wake-up time and transaction The sum of the durations cannot exceed the ranging interval duration. Of course, the transaction duration is not necessary. The application layer can set the transaction communication priority to be higher than the ranging communication priority. In this way, the ranging communication can be performed after the transaction communication is completed at one time. The details will be described below.

Correspondingly, on the side of the device under test, as the target device for transaction communication, after receiving the above-mentioned transaction wake-up message within the transaction wake-up time, it determines that the transaction device address in the transaction wake-up message matches its own address, and then remains awake. state. Transaction data can be sent and received with the ranging device at a later stage. Referring to Figure 3, for other devices under test, after receiving the above-mentioned transaction wake-up message within the transaction wake-up time, it is determined that the transaction device address in the transaction wake-up message does not match its own address, and then enters a low power consumption state.

Optionally, the above transaction wake-up message further includes a channel switching instruction, which is used to instruct the device under test to use a new channel to communicate with the ranging device during subsequent transaction communication times. Correspondingly, after receiving the channel switching instruction, the device under test uses the new channel to conduct transaction communication with the ranging device within the transaction communication time.

For example, the ranging device uses channel 5 to communicate with the device under test during the ranging communication phase. However, the ranging device senses that channel 5 is interfered by other signals and the communication quality decreases. At the same time, the quality of channel 9 is better, so it sends a signal to the device under test. A channel switching instruction is added to the transaction wake-up message to instruct the device under test to use channel 9 to communicate with it in the next transaction communication phase. Through this method, the quality of UWB transaction communication can be improved and the transaction success rate can be guaranteed.

Step 130: The ranging device conducts transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message.

Specifically, the ranging device sends the transaction data message or control message of the application layer to the device under test through UWB technology according to the transaction communication parameters, or receives the transaction data message or control message sent by the device under test. For example, if the transaction data message or control message sent by the ranging device does not receive a response from the device under test within the response timeout period, the transaction data message or control message can be resent according to the number of retransmissions. The amount of transaction data sent by the ranging device each time needs to be configured according to the data packet size parameter. Transaction data messages or control messages can be in APDU (Application Protocol Data Unit) format. The specific transaction communication process can refer to the transaction communication process of similar application scenarios under NFC (Near Field Communication), Bluetooth or Wi-Fi and other technologies.

Optionally, a response message sent by the device under test to the above transaction wake-up message may be received at the beginning of the transaction communication time in FIG. 2 . The response message is used to confirm to the ranging device that the device under test has received the transaction wake-up message, accepted transaction communication parameters, and is in a wake-up state for transaction communication. Correspondingly, when the transaction data interaction is completed and the transaction communication ends, the ranging device can send a transaction end notification to the device under test, so that the device under test can enter a low power consumption state in time and save device power. Similarly, if the ranging device does not receive a response from the device under test to the transaction wake-up message, it can also enter a low-power state.

Generally speaking, before each ranging communication, the device under test needs to be in a receiving state in advance to wait for the ranging message from the ranging device. In order to avoid the transaction data message or control message in the transaction communication being inconsistent with the subsequent ranging communication. If ranging messages conflict, the ranging device can set the ranging protection time before entering the next ranging communication. Optionally, step 130 further includes:

Step 140: The ranging device enters the ranging protection time after the above transaction time and remains silent.

Specifically, as shown in Figure 2, after the transaction communication time ends, that is, after the transaction duration expires, the ranging device enters the ranging protection time. The length of the ranging protection time is similar to the transaction duration and can be set flexibly. It is not necessary to follow the The time slot is specified and set. Preferably, the ranging protection time length is the response timeout length multiplied by the number of retransmissions. The reason for this setting is that during the transaction communication process, if a device believes that the message sent to the peer device needs to be resent, it must allow enough time to resend and wait for the other party's response. In this way, even if a device (ranging device or device under test) needs to resend n messages to the peer device at the last moment of the transaction communication time, it will not conflict with the ranging messages in subsequent ranging communications. In addition, if the ranging protection time is set, the sum of ranging communication time, transaction wake-up time, transaction duration and ranging protection time cannot exceed the above ranging interval.

The above silent state means that neither the ranging device nor the device under test will send new transaction communication-related messages, such as transaction data messages or control messages.

By setting the ranging protection time, you can prevent transaction communications from affecting ranging communications and improve compatibility with UWB ranging communications.

Generally speaking, within a ranging interval, the data interaction required for this transaction can be completed. However, if the amount of transaction-related data is large, a ranging interval cannot complete all transaction data interaction within a transaction duration. At this time, in order not to affect subsequent ranging communications, the data involved in this transaction needs to be divided and exchanged within different ranging intervals. Optionally, the above step 130 further includes:

Step 131: The ranging device determines whether the above transaction duration has expired. If not, it sends a transaction message to the device under test. If so, it suspends sending transaction messages to the device under test.

Specifically, the ranging device sends transaction messages (such as transaction data messages or control messages) to the device under test within the transaction duration. If the transaction duration expires, the sending of transaction messages is suspended to avoid affecting subsequent ranging communications.

Correspondingly, as shown in Figure 2, after step 130 or step 140, the method of this embodiment may further include:

Step 150: The ranging device performs the next UWB ranging communication with the device to be tested, and enters the next transaction wake-up time after the next UWB ranging communication. After the next transaction wake-up time, the ranging device continues to send data to the device to be measured. The test device sends transaction messages.

Specifically, similar to step 120, during the next transaction wake-up time, the ranging device can send a transaction wake-up message to the device under test, so that the device under test continues to conduct transaction communications with the ranging device during the next transaction communication time. It can be understood that the new transaction wake-up message includes the address of the device under test and transaction communication parameters. The value of the transaction communication parameters may be consistent with or different from the last setting, which is specifically configured by the application layer.

The above implementation method essentially means that the priority of ranging communication is higher than the priority of transaction communication. By interspersing transaction data with each other in different ranging intervals, transaction communication will not affect the timing ranging communication stipulated in the standard specification, ensuring that The compatibility of UWB transaction communication and ranging communication is improved.

In another implementation, the application layer may set the transaction communication priority to be higher than the ranging communication priority. In this case, the transaction communication process does not need to be limited to the ranging interval of UWB ranging communication. That is to say, the transaction communication parameters set by the application layer do not include the transaction duration, and transaction communication can continue until the end of the transaction. That is, the arrival of each ranging cycle will not interrupt the ongoing UWB transaction communication. Therefore, step 130 of this embodiment may specifically include:

Step 132: During the transaction communication process, when the ranging interval expires, the ranging device does not perform UWB ranging communication and continues to conduct transaction communication with the device under test.

Specifically, if this transaction communication ends within a ranging interval, the ranging device will normally trigger UWB ranging communication when the ranging interval timer expires. However, if the time required for transaction communication exceeds the ranging interval, The expiration of the ranging interval timer will not trigger the devices at both ends to perform ranging communication, but will continue to conduct transaction communication until the transaction is completed. Figure 4 is another device timing status schematic diagram provided by an embodiment of the present application. The transaction communication times in the figure are across multiple ranging intervals. In addition, when the transaction communication priority is higher than the ranging communication priority, the ranging protection time does not need to be set.

Correspondingly, after step 130, the method of this embodiment may further include:

Step 160: The ranging device sends a transaction end notification to the device under test so that the device under test enters a low power consumption state. The ranging device enters a low power consumption state and communicates with the device under test when the above ranging interval expires. The device performs the next UWB ranging communication.

Specifically, see Figure 4. When the transaction data interaction is completed, the ranging device sends a transaction end notification message to the device under test. After receiving the message, the device under test returns a response and enters a low power consumption state. The ranging device also enters a low power consumption state after receiving the response message from the device under test. When the above ranging interval timer expires, the ranging device conducts the next UWB ranging communication with each surrounding device to be measured.

In the above embodiment, the application layer sets the transaction communication priority to be higher than the ranging communication priority, so that UWB transaction communication can be completed at one time, ensuring the integrity of transaction data interaction, and further improving the efficiency of UWB transaction communication.

In the embodiment of this application, after the ranging device and the device under test complete ranging communication, the ranging device sends a transaction wake-up message to the ranging device within the transaction wake-up time to keep it awake, and communicates through the transaction contained in the message. Parameters communicate with the device under test via UWB. Compared with traditional UWB ranging, the ranging device can directly transmit transaction data with the device under test through UWB after the ranging phase, realizing transaction communication under UWB technology, without the need to go through wireless communication such as NFC, Bluetooth or Wi-Fi. Communication technology for transactions ensures the consistency and reliability of data interaction, greatly improves the efficiency and success rate of transactions, and saves hardware costs. At the same time, because UWB technology has a relatively large communication distance and high sensitivity, users do not have to physically bring the device under test close to the distance measuring device, thus enabling fast and non-sensitive payment or card swiping, which greatly improves the user experience.

Figure 5 shows a schematic flowchart of another UWB communication method 500 according to an embodiment of the present application. The method 500 can be applied to the above-mentioned device under test, that is, it can be executed by the device under test. It can be understood that this embodiment is a method flow on the device side under test corresponding to the above method embodiment, and the same or similar technical details will not be described again. As shown in Figure 1, the method includes the following steps:

Step 510: The device under test conducts UWB ranging communication with the ranging device.

Specifically, the device under test can perform ranging communication with the ranging device for 5 time slots as shown in Figure 2, and can perform ranging communication again after a certain ranging interval.

Step 520: After the ranging communication ends, the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time and remains awake; the transaction wake-up message is generated by the ranging device based on the above ranging communication results.

Specifically, the transaction wake-up message may include the transaction device address. Before step 520, the method in this embodiment includes: when the distance between the device to be tested and the distance measuring device is less than or equal to a preset distance threshold and is the closest to the distance measuring device, the distance measuring device The address is added to the transaction wake-up message as the transaction device address, and the transaction wake-up message is sent within the transaction wake-up time. Correspondingly, step 520 may specifically include: the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time, determines that the transaction device address in the transaction wake-up message matches its own address, and then maintains the awake state. Transaction data can be sent and received with the ranging device at a later stage.

As shown in Figure 2, the device under test receives the transaction wake-up message within the transaction wake-up time of 2 time slots. The specific number of time slots included in the transaction wake-up time can be flexibly set. Setting multiple time slots can avoid the problem that once the target device under test fails to wake up in one time slot, it must wake up at the next transaction wake-up time, resulting in a decrease in transaction communication efficiency. The above transaction wake-up message may include transaction communication parameters, such as transaction duration, response timeout duration, number of retransmissions and/or data packet size, etc. For the specific configuration method, please refer to the description in step 120 of the above method embodiment.

Step 530: The device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message.

Specifically, the device under test sends the transaction data message or control message of the application layer to the ranging device through UWB technology according to the transaction communication parameters, or receives the transaction data message or control message sent by the ranging device. For details, reference may be made to the description in step 130 of the above method embodiment.

Optionally, at the beginning of the transaction communication time in Figure 2, the device under test can send a response message to the ranging device to the above transaction wake-up message. The response message is used to confirm to the ranging device that the device under test has received the transaction wake-up message, accepted transaction communication parameters, and is in a wake-up state for transaction communication. Correspondingly, when the transaction data interaction is completed and the transaction communication ends, the device under test can receive the transaction end notification sent by the ranging device, and enter the low power consumption state in time to save the device power.

Optionally, the above transaction wake-up message further includes a channel switching instruction. Correspondingly, step 530 may include: after receiving the channel switching instruction, the device under test uses a new channel to conduct transaction communication with the ranging device within the transaction communication time.

Similarly, in order to avoid conflicts between transaction data messages or control messages in transaction communications and ranging messages in subsequent ranging communications, the device under test can set a ranging protection time before entering the next ranging communication. Optionally, step 530 further includes:

Step 540: The device under test enters the ranging protection time after the above-mentioned transaction time and remains silent.

Specifically, as shown in Figure 2, after the transaction communication time ends, that is, after the transaction duration expires, the device under test enters the ranging protection time. Preferably, the ranging protection time length is the response timeout length multiplied by the number of retransmissions. By setting the ranging protection time, you can prevent transaction communications from affecting ranging communications and improve compatibility with UWB ranging communications.

Similarly, if the amount of data related to the transaction is large, in order not to affect subsequent ranging communications, the data involved in this transaction needs to be divided and interacted within different ranging intervals. Optionally, the above step 530 further includes:

Step 531: The device under test determines whether the above transaction duration has expired. If not, it sends transaction data to the ranging device. If so, it suspends sending transaction data to the ranging device.

Correspondingly, as shown in Figure 2, after step 530 or step 540, the method of this embodiment may further include:

Step 550: The device under test conducts the next UWB ranging communication with the ranging device, and enters the next transaction wake-up time after the next UWB ranging communication. After the next transaction wake-up time, the device under test continues to communicate with the measuring device. Transaction data is sent from the device.

Specifically, similar to step 520, during the next transaction wake-up time, the device under test can receive a new transaction wake-up message sent by the ranging device, so that the device under test can continue to conduct transactions with the ranging device during the next transaction communication time. communication. It can be understood that the new transaction wake-up message includes the address of the device under test and transaction communication parameters. The value of the transaction communication parameters may be consistent with or different from the last setting, which is specifically configured by the application layer.

Likewise, in another embodiment, the application layer may set a higher priority for transaction communications than for ranging communications. In this case, the transaction communication parameters set by the application layer do not include the transaction duration. The transaction communication can continue until the end of the transaction. The arrival of each ranging period will not interrupt the ongoing UWB transaction communication. Therefore, step 530 in this embodiment may specifically include:

Step 532: During the transaction communication process, when the ranging interval expires, the device under test will not perform UWB ranging communication and continue to conduct transaction communication with the ranging device.

Specifically, if the time required for transaction communication exceeds the ranging interval, the expiration of the ranging interval timer will not trigger the devices at both ends to perform ranging communication, but will continue transaction communication until the transaction is completed. Referring to FIG. 4 , the transaction communication time of the device under test spans multiple ranging intervals.

Correspondingly, after step 530, the method of this embodiment may further include:

Step 560: The device under test enters a low power consumption state after receiving the transaction end notification sent by the ranging device, and conducts the next UWB ranging communication with the ranging device when the above ranging interval expires.

Specifically, after receiving the transaction end notification message sent by the ranging device, the device under test returns a response and enters a low power consumption state.

In the embodiment of the present application, after the ranging device and the device under test complete the ranging communication, the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time to remain awake, and communicates through the transaction contained in the message. Parameters and ranging devices communicate via UWB. Compared with traditional UWB ranging, the device under test can directly transmit transaction data with the ranging device through UWB after the ranging stage, realizing transaction communication under UWB technology, without the need to go through wireless communication such as NFC, Bluetooth or Wi-Fi. Communication technology for transactions ensures the consistency and reliability of data interaction, greatly improves the efficiency and success rate of transactions, and saves hardware costs. At the same time, because UWB technology has a relatively large communication distance and high sensitivity, users do not have to physically bring the device under test close to the distance measuring device, thus enabling fast and non-sensitive payment or card swiping, which greatly improves the user experience.

Figure 6 shows a schematic structural diagram of a UWB chip according to an embodiment of the present application. The UWB chip 60 can be applied to ranging equipment. As shown in Figure 6, the UWB chip 60 can specifically include: a communication module 61 and an operation module 62.

Among them, the communication module 61 is used to perform UWB ranging communication with the device under test; the operation module 62 is used to generate a transaction wake-up message according to the ranging communication result after the ranging communication is completed, and send a transaction wake-up message to the device under test within the transaction wake-up time. message to keep it awake; the communication module 61 is also configured to conduct transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message.

In an optional manner, the transaction wake-up message includes the address of the transaction device; the operation module 62 is also configured to: when the distance between the device to be tested and the ranging device is less than or equal to a preset distance threshold and is The closest distance, add the address of the device under test as the transaction device address to the transaction wake-up message, and send the transaction wake-up message within the transaction wake-up time.

In an optional manner, the transaction communication parameters include: transaction duration; the operation module 62 is also configured to cause the ranging device to enter the ranging protection time and maintain a silent state after the transaction duration.

In an optional method, the transaction communication parameters include: response timeout duration and the number of retransmissions; the above ranging protection time length is the response timeout duration multiplied by the number of retransmissions.

In an optional manner, the above-mentioned communication module 61 is also used to determine whether the transaction duration has expired, and if not, send a transaction message to the device under test, and if so, suspend sending transaction messages to the device under test; and the above-mentioned communication Module 61 is also configured to conduct the next UWB ranging communication with the device under test, enter the next transaction wake-up time after the next UWB ranging communication, and continue to send transactions to the device under test after the next transaction wake-up time. information.

In an optional manner, the above-mentioned communication module 61 is also configured to, during the transaction communication process, when the ranging interval expires, do not perform UWB ranging communication and continue transaction communication with the device under test; and The above-mentioned communication module 61 is also used to send a transaction end notification to the device under test so that the device under test enters a low power consumption state, and the ranging device enters a low power consumption state, and when the ranging interval expires , conduct the next UWB ranging communication with the device under test.

It should be noted that the above-mentioned UWB chip 60 is based on the same concept as the UWB communication method 100 provided in the embodiment of the present application. For details and beneficial effects, please refer to the description in the above-mentioned embodiment of the UWB communication method 100 and will not be described again here.

Figure 7 shows a schematic structural diagram of another UWB chip according to an embodiment of the present application. The UWB chip 70 can be applied to the device under test. As shown in FIG. 7 , the UWB chip 70 can specifically include: a communication module 71 and an operation module 72 .

Among them, the communication module 71 is used to perform UWB ranging communication with the ranging device; the operation module 72 is used to receive the transaction wake-up message sent by the ranging device within the transaction wake-up time after the ranging communication ends and maintain the wake-up state; The transaction wake-up message is generated by the ranging device according to the ranging communication result; the communication module 71 is also used to conduct transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message.

In an optional manner, the transaction wake-up message includes a transaction device address; the operation module 72 is also configured to receive a transaction wake-up message sent by the ranging device within the transaction wake-up time, and determine the transaction device address in the transaction wake-up message. If it matches its own address, it will remain awake.

In an optional manner, the above-mentioned transaction communication parameters include: transaction duration; the operation module 72 is also configured to enter the ranging protection time after the transaction duration and maintain a silent state.

In an optional manner, the above transaction communication parameters include: response timeout duration and number of retransmissions; the ranging protection time length is the response timeout duration multiplied by the number of retransmissions.

In an optional manner, the communication module 71 is also used to determine whether the transaction duration has expired, and if not, send transaction data to the ranging device, and if so, suspend sending transaction data to the ranging device; and the above-mentioned communication module 71 It is also used to conduct the next UWB ranging communication with the ranging device, enter the next transaction wake-up time after the next UWB ranging communication, and continue to send transaction data to the ranging device after the next transaction wake-up time.

In an optional manner, the communication module 71 is also configured to not perform UWB ranging communication when the ranging interval expires during the transaction communication process, but to continue transaction communication with the ranging device; and The above-mentioned communication module 71 is also used to enter a low power consumption state after receiving the transaction end notification sent by the ranging device, and to conduct the next UWB ranging communication with the ranging device when the ranging interval expires.

It should be noted that the above-mentioned UWB chip 70 is based on the same concept as the UWB communication method 500 provided in the embodiment of the present application. For details and beneficial effects, please refer to the description in the above-mentioned UWB communication method 500 embodiment, and will not be described again here.

FIG. 8 shows a schematic structural diagram of yet another UWB chip 80 provided by an embodiment of the present application. As shown in Figure 8, the UWB chip 80 includes: a memory 81 and a processor 82; the memory 81 is used to store a computer program, and the processor 82 is used to call the computer program. When the computer program is executed by the processor 82, such that The UWB chip 80 executes the UWB communication method in any of the above embodiments.

An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a computer, the computer executes the UWB communication method in any of the above embodiments.

An embodiment of the present application also provides a computer program product containing instructions, which when executed by a computer causes the computer to perform the UWB communication method in any of the above embodiments.

Figure 9 shows a schematic structural diagram of a UWB ranging device 90 provided by an embodiment of the present application. As shown in FIG. 9 , the UWB ranging device 90 may include the above-mentioned UWB chip 60 or UWB chip 80 . As an example and not a limitation, the ranging device 90 may be an access control device, a gate, a POS terminal device, or other card reading device with UWB function.

Figure 10 shows a schematic structural diagram of a UWB device to be tested 1000 provided by an embodiment of the present application. As shown in FIG. 10 , the UWB device under test 1000 may include the above-mentioned UWB chip 70 or UWB chip 80 . Optionally, the device under test 1000 also includes SE1100, which stores transaction-related applications (such as bus app or payment app) and transaction information. During the transaction communication process, the application in the SE can communicate with the SE1100 through the above-mentioned UWB chip. Ranging equipment interacts with transaction information.

As an example and not a limitation, the device under test 1000 can be various chip cards (such as bus cards, access cards, bank cards, etc.), mobile terminal devices, wearable devices, tablets or other card simulation devices with UWB functions. wait. The wearable devices include devices that are full-featured, large in size, and can realize complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Equipment used, such as various types of smart bracelets, smart jewelry and other equipment for physical sign monitoring.

It should be noted that, on the premise of no conflict, the various embodiments described in this application and/or the technical features in each embodiment can be combined with each other arbitrarily, and the technical solution obtained after the combination should also fall within the protection scope of this application. .

The systems, devices and methods disclosed in the embodiments of this application can be implemented in other ways. For example, some features of the method embodiments described above may be omitted or not performed. The device embodiments described above are only illustrative, and the division of units is only a logical function division. In actual implementation, there may be other divisions, and multiple units or components may be combined or integrated into another system. In addition, the coupling between units or the coupling between components may be direct coupling or indirect coupling, and the above-mentioned coupling includes electrical, mechanical or other forms of connection.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes and technical effects produced by the above-described devices and equipment can be referred to the corresponding processes and technical effects in the foregoing method embodiments. Herein No longer.

It should be understood that the specific examples in the embodiments of the present application are only to help those skilled in the art better understand the embodiments of the present application, but do not limit the scope of the embodiments of the present application. Those skilled in the art can use the above embodiments to Various improvements and deformations are made, and these improvements or deformations fall within the protection scope of the present application.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A UWB communication method, characterized in that it is applied to ranging equipment, and the method includes:

The ranging device performs UWB ranging communication with the device under test;

After the ranging communication ends, the ranging device generates a transaction wake-up message according to the ranging communication result, and sends a transaction wake-up message to the device under test within the transaction wake-up time to keep it awake; and,

The ranging device performs transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message.
The communication method according to claim 1, characterized in that the transaction wake-up message includes a transaction device address;

The ranging device generates a transaction wake-up message based on the ranging communication result, and sends a transaction wake-up message to the device under test within the transaction wake-up time to keep it awake, including:

When the distance between the device to be measured and the ranging device is less than or equal to the preset distance threshold and is the closest to the ranging device, the ranging device adds the address of the device to be measured as a transaction device address to In the transaction wake-up message, the transaction wake-up message is sent within the transaction wake-up time;

After sending a transaction wake-up message to the device under test within the transaction wake-up time, the method includes:

The device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time, determines that the transaction device address in the transaction wake-up message matches its own address, and then maintains the wake-up state.
The communication method according to claim 1, characterized in that the transaction communication parameters include: transaction duration; the ranging device communicates with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message. Following transaction communication, the method includes:

The ranging device enters the ranging protection time after the transaction duration and remains silent.
The communication method according to claim 3, characterized in that the transaction communication parameters include: response timeout duration and the number of retransmissions; the ranging protection time length is the response timeout duration multiplied by the number of retransmissions.
The communication method according to claim 3 or 4, characterized in that, the ranging device performs transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message, including:

The ranging device determines whether the transaction duration has expired, and if not, sends a transaction message to the device under test; if so, suspends sending transaction messages to the device under test;

After the ranging device conducts transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The ranging device performs the next UWB ranging communication with the device to be tested, and enters the next transaction wake-up time after the next UWB ranging communication. After the next transaction wake-up time, the measurement device The remote device continues to send transaction messages to the device under test.
The communication method according to claim 1 or 2, characterized in that, the ranging device performs transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message, including:

During the transaction communication process, the ranging device does not perform UWB ranging communication when the ranging interval expires, and continues to conduct transaction communication with the device under test;

After the ranging device conducts transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The ranging device sends a transaction end notification to the device under test so that the device under test enters a low power consumption state. The ranging device enters the low power consumption state, and when the ranging interval expires , conduct the next UWB ranging communication with the device under test.
A UWB communication method, characterized in that it is applied to a device under test, and the method includes:

The device under test performs UWB ranging communication with the ranging device;

After the ranging communication ends, the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time and maintains the awake state; the transaction wake-up message is sent by the ranging device according to the measurement communication results are generated; and,

The device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message.
The communication method according to claim 7, characterized in that the transaction wake-up message includes a transaction device address;

Before the device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time, the method includes:

After the ranging communication ends, when the distance between the device to be measured and the ranging device is less than or equal to the preset distance threshold and is the closest to the ranging device, the ranging device will The measuring device address is added to the transaction wake-up message as the transaction device address, and the transaction wake-up message is sent within the transaction wake-up time;

The device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time and maintains the wake-up state, including:

The device under test receives the transaction wake-up message sent by the ranging device within the transaction wake-up time, determines that the transaction device address in the transaction wake-up message matches its own address, and then maintains the wake-up state.
The communication method according to claim 7, characterized in that the transaction communication parameters include: transaction duration; the device under test communicates with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message. Following transaction communication, the method includes:

The device under test enters the ranging protection time after the transaction duration and remains in a silent state.
The communication method according to claim 9, characterized in that the transaction communication parameters include: response timeout duration and the number of retransmissions; the ranging protection time length is the response timeout duration multiplied by the number of retransmissions.
The communication method according to claim 9 or 10, wherein the device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message, including:

The device under test determines whether the transaction duration has expired, and if not, sends transaction data to the ranging device; if so, suspends sending transaction data to the ranging device;

After the device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The device to be tested performs the next UWB ranging communication with the ranging device, and enters the next transaction wake-up time after the next UWB ranging communication. After the next transaction wake-up time, the device to be tested The measuring device continues to send transaction data to the ranging device.
The communication method according to claim 7 or 8, characterized in that, the device under test performing transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message includes:

During the transaction communication process, the device under test does not perform UWB ranging communication when the ranging interval expires, and continues to conduct transaction communication with the ranging device;

After the device under test conducts transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message, the method includes:

The device under test enters a low power consumption state after receiving the transaction end notification sent by the ranging device, and when the ranging interval expires, performs the next UWB ranging communication with the ranging device.
A UWB chip is characterized in that it is used in ranging equipment, and the chip includes:

Communication module, used for UWB ranging communication with the device under test;

An operation module configured to, after the ranging communication ends, generate a transaction wake-up message according to the ranging communication result, and send a transaction wake-up message to the device under test within the transaction wake-up time to keep it awake; and,

The communication module is also configured to conduct transaction communication with the device under test through UWB according to the transaction communication parameters included in the transaction wake-up message.
A UWB chip, characterized in that it is applied to a device under test, and the chip includes:

Communication module, used for UWB ranging communication with ranging equipment;

An operation module configured to, after the ranging communication ends, receive a transaction wake-up message sent by the ranging device within the transaction wake-up time and maintain the wake-up state; the transaction wake-up message is sent by the ranging device according to the measurement communication results are generated; and,

The communication module is also configured to conduct transaction communication with the ranging device through UWB according to the transaction communication parameters included in the transaction wake-up message.
A UWB ranging device, characterized in that the ranging device includes: the UWB chip according to claim 13.
A UWB device to be tested, characterized in that the device to be tested includes: the UWB chip according to claim 14; and a security element.