Method for realizing communication anti-crosstalk of wireless charging system

Abstract

The application relates to a method for realizing communication anti-crosstalk for a wireless charging system, wherein the method comprises the following steps: a receiving end in the wireless charging system performs a feedback operation of sending a receiving end communication package on a sending end according to magnetic field energy sent by the sending end; an id&config identification configuration stage is entered, the sending end determines a receiving end communication package type according to a received communication package feedback signal, and then determines a wireless charging receiving end type of a current side; a power transfer energy transmission stage is entered, whether the sending end receives a new communication package is judged; according to the received new communication package, a new communication package type is confirmed, and then it is determined that the current received communication package is sent by a receiving end of which side; and finally, matching processing is performed to realize matching connection of the wireless charging receiving end and the wireless charging sending end. By modifying the communication sent by the wireless charging receiving end of one side of the intelligent running shoes, the method can make the one side of the intelligent running shoes obviously different from the other side of the intelligent running shoes.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology, and more particularly to the field of preventing communication crosstalk in dual-system or multi-system wireless charging technology, specifically a method for preventing communication crosstalk in wireless charging systems. Background Technology

[0002] The smart running shoes have a built-in battery that acts as a wireless charging receiver. Placing them on a charging pad allows the battery to be charged wirelessly. The charging pad itself is the wireless charging transmitter, and it contains two transmitters to charge each of the left and right shoes. There are two separate systems (one transmitter and one receiver) for each shoe, using the WPC Qi standard. Both the transmitter and receiver have built-in coils for transmitting electrical energy and communication signals. The transmitter transmits electrical energy to the receiver (typically at frequencies between 110kHz and 205kHz). When the shoes are charging on the transmitter's charging pad, the receiver (the shoes) sends several communication signals to the transmitter (charging pad) for control and adjustment (one signal is transmitted via the coil, typically at 2kHz). For example, a control error packet (CEP) (this packet contains 1 byte of data; when the value is 0, no adjustment is needed; when the value is not 0, if the highest bit is 1, the voltage needs to be reduced; if the highest bit is 0, the voltage needs to be increased) will cause the transmitter to adjust parameters such as the signal frequency or duty cycle on the coil to increase or decrease the induced voltage on the receiver to meet the requirements; another communication power packet (RPP) is used by the wireless charging transmitter to determine if there are large metal foreign objects or other issues on the charging pad (e.g., shoes may be placed off-center); and the end charging packet (EPT) will stop transmitting electrical energy when the wireless charging transmitter receives this packet.

[0003] In actual use, during charging, because the batteries in the left and right shoes may not be charging or fully charged at the same rate, one shoe may charge first while the other charges later. For example, if the battery in the left shoe is fully charged first, it will send a fully charged EPT packet. The corresponding wireless charging transmitter on the left will receive the EPT packet and stop transmitting power. However, a situation may arise where the battery in the right shoe, although not fully charged, is also mistakenly received by the corresponding wireless charging transmitter on the right, causing it to stop transmitting power and resulting in that shoe's battery not being fully charged. This situation, where one wireless charging transmitter correctly receives a communication packet sent by the other wireless charging receiver, is called communication crosstalk.

[0004] Currently, common methods for preventing communication crosstalk in dual-system or multi-system wireless charging for similar smart running shoes include hardware-based and system / software-based methods. Hardware-based methods include adding shielding covers to the wireless charging transmitter and receiver coils, or adding filtering circuits to the power lines to reduce the impact of communication from one side on the other. System / software-based methods include separating the operating frequency ranges of the two wireless charging transmitter coils on the charging board, for example, one frequency range of 130kHz to 140kHz and the other of 150kHz to 160kHz, preventing the wireless charging transmitter from correctly receiving communication from the receiver on the other side. Other methods use alternative communication methods to replace the coil-based communication method used in the WPC Qi standard.

[0005] In summary, existing methods for preventing crosstalk in dual-system wireless charging often require additional circuitry or modules, increasing costs, or involve complex control systems that may offer some improvement but are not very effective. Furthermore, most current methods focus on isolating communication, making it difficult to address communication crosstalk. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a low-cost and effective method for preventing crosstalk in wireless charging systems.

[0007] To achieve the above objectives, the present invention provides a method for preventing crosstalk in wireless charging systems as follows:

[0008] The main feature of this method for preventing crosstalk in wireless charging systems is that the method includes the following steps:

[0009] (1) The wireless charging receiver in the wireless charging system performs a feedback operation on the wireless charging transmitter to transmit and receive communication packets based on the magnetic field energy transmitted by the wireless charging transmitter.

[0010] (2) The system enters the id&config identification and configuration stage. The wireless charging transmitter first determines the communication packet type of the receiver based on the feedback signal of the received communication packet, and then determines the wireless charging receiver type on the current side.

[0011] (3) The system enters the Power transfer stage and performs the judgment and processing operation of whether the wireless charging transmitter has received a new communication packet from the receiver.

[0012] (4) The wireless charging transmitter confirms the new receiver communication packet type based on the received new receiver communication packet.

[0013] (5) The wireless charging transmitter determines which side's wireless charging receiver sent the currently received communication packet based on the correspondence between the wireless charging receiver type and the new receiver communication packet type.

[0014] (6) The wireless charging transmitter performs corresponding communication packet information processing on the communication packet that matches the type of the wireless charging receiver on the determined side, so as to realize the matching connection between the wireless charging receiver and the wireless charging transmitter.

[0015] Preferably, the feedback operation of sending and receiving communication packets in step (1) specifically refers to:

[0016] (1.1) The system defines the receiver communication packet sent by the first wireless charging receiver with a preset distinguishing position as a modified receiver communication packet, generates a modified communication packet feedback signal, and sends it to the wireless charging transmitter.

[0017] (1.2) The system defines the receiver communication packet sent by the second wireless charging receiver as a normal receiver communication packet, generates a normal communication packet feedback signal, and sends it to the wireless charging transmitter.

[0018] Preferably, the receiving end communication packet specifically includes:

[0019] The termination packets are the charging packet EPT, communication power packet RPP, communication control error packet CEP, signal strength packet SSP, type identification packet TIP, and information configuration packet ICP.

[0020] Preferably, the generation of the modified communication packet feedback signal specifically includes the following steps:

[0021] (1.1.a) The system controls the range of valid values ​​of the Message data value of the Communication Control Error Packet (CEP) in the modified receiver communication packet to below 0x3f after removing the sign bit, keeps the valid value of the sign bit of bit7 unchanged, and performs XOR logic processing on the valid value of bit6 with 1.

[0022] (1.1.b) The system controls the Message data value of the communication power packet RPP in the modified receiver communication packet to be below 0x3f by dividing it by the first receiver preset fixed value, keeps the valid value of bit7 unchanged, and performs XOR logic processing on the valid value of bit6 with 1.

[0023] (1.1.c) The system keeps the valid value of bit 7 of the Message data value of the other communication packets in the modified receiver communication packet, excluding the Communication Control Error Packet (CEP) and the Communication Power Packet (RPP), unchanged, and performs an XOR operation on the valid value of bit 6 with 1.

[0024] (1.1.d) After the processing is completed, the first wireless charging receiver sends a modified communication packet feedback signal to the wireless charging transmitter.

[0025] Preferably, the generation of the ordinary communication packet feedback signal specifically includes the following steps:

[0026] (1.2.ba) The system controls the range of valid values ​​of the Message data value of the Communication Control Error Packet (CEP) in the ordinary receiver communication packet to below 0x3f after removing the sign bit, and keeps the valid values ​​of the sign bit (bit 7) and bit 6 unchanged.

[0027] (1.2.b) The system controls the Message data value of the communication power packet RPP in the ordinary receiver communication packet to be below 0x3f by dividing it by the second receiver preset fixed value, and keeps the valid values ​​of bit7 and bit6 unchanged.

[0028] (1.2.c) The system will not perform any control processing on the Message data values ​​of the communication packets other than the Communication Control Error Packet (CEP) and the Communication Power Packet (RPP) in the ordinary type receiver communication packets.

[0029] (1.2.d) After the processing is completed, the second wireless charging receiver sends a normal communication packet feedback signal to the wireless charging transmitter.

[0030] Preferably, step (2) specifically includes the following steps:

[0031] (2.1) If the wireless charging transmitter on the current side receives the modified communication packet feedback signal, it is determined that the modified communication packet feedback signal is a modified receiver communication packet sent by the first wireless charging receiver, and it is determined that the device placed on this side is a modified wireless charging receiver; otherwise, proceed to step (2.2).

[0032] (2.2) If the wireless charging transmitter on the current side receives the ordinary communication packet feedback signal, it is determined that the ordinary communication packet feedback signal is an ordinary receiver communication packet sent by the second wireless charging receiver, and it is determined that the device placed on this side is an ordinary wireless charging receiver.

[0033] Preferably, step (3) specifically includes the following steps:

[0034] (3.1) The system determines whether the wireless charging transmitter has received a new communication packet from the receiver;

[0035] (3.2) If the wireless charging transmitter receives a new receiver communication packet, then continue to step (4);

[0036] (3.3) Otherwise, the wireless charging transmitter repeats the above step (3.1) to make a continuous judgment until a new receiver communication packet is received, then continues to step (4).

[0037] Preferably, step (4) specifically includes the following steps:

[0038] (4.1) Determine whether the wireless charging transmitter on the current side has received a new End Charge Packet (EPT). If so, further determine the information packet type of the EPT and proceed to step (5); otherwise, proceed to step (4.2).

[0039] (4.2) Determine whether the wireless charging transmitter on the current side has received a new communication power packet RPP. If so, further determine the information packet type of the communication power packet RPP and proceed to step (5); otherwise, proceed to step (4.3).

[0040] (4.3) Determine whether the wireless charging transmitter on the current side has received a new communication control error packet (CEP). If so, further determine the information packet type of the control error packet (CEP) and proceed to step (5); otherwise, return to step (3).

[0041] Preferably, the determination of the information packet type of the EPT termination charging pack in step (4.1) specifically includes:

[0042] The information packet type of the End Charge Packet (EPT) is determined according to the following rules:

[0043] If the valid value of bit 6 of the Message data value in the End Charge Packet (EPT) is 0, then the packet type of the current End Charge Packet (EPT) is determined to be a normal packet; otherwise, the packet type of the current End Charge Packet (EPT) is determined to be a modified packet.

[0044] Preferably, the determination of the information packet type of the communication power packet RPP in step (4.2) specifically involves:

[0045] The packet type of the RPP (Reference Power Packet) is determined according to the following rules:

[0046] If the valid value of bit 6 of the Message data value in the communication power packet RPP is 0, then the information packet type of the current communication power packet RPP is determined to be a normal information packet; otherwise, the information packet type of the current communication power packet RPP is determined to be a modified information packet.

[0047] Preferably, the determination of the information packet type of the Communication Control Error Packet (CEP) in step (4.3) specifically involves:

[0048] The information packet type of the Communication Control Error Packet (CEP) shall be determined according to the following rules:

[0049] If the valid value of bit 7 of the Message data value in the Communication Control Error Packet (CEP) is equal to the valid value of bit 6, then the information packet type of the current Communication Control Error Packet (CEP) is determined to be a normal information packet; otherwise, the information packet type of the current Communication Control Error Packet (CEP) is determined to be a modified information packet.

[0050] Preferably, step (5) specifically includes the following steps:

[0051] (5.1) The wireless charging transmitter determines whether the type of the wireless charging receiver on the current side is the same as the type of the new receiver communication packet received.

[0052] (5.2) If yes, then further determine which side's wireless charging receiver sent the new communication packet feedback signal received by the wireless charging transmitter on the current side; if no, proceed to step (5.3).

[0053] (5.3) Discard the communication packet feedback signal received by the wireless charging transmitter on the current side and return to step (3).

[0054] Preferably, step (6) specifically includes the following steps:

[0055] (6.1) If the communication packet feedback signal received by the wireless charging transmitter on the current side is a modified communication packet feedback signal, then proceed to step (6.1.1); otherwise, proceed to step (6.2).

[0056] (6.2) Determine that the type of communication packet received by the wireless charging transmitter on the current side is a normal communication packet, and proceed to step (6.3);

[0057] (6.3) The system performs information processing by multiplying the communication power packet RPP of the ordinary communication packet by the preset fixed value of the second receiving end;

[0058] (6.4) The system performs matching and function adjustment operations on the ordinary wireless charging transmitter and the ordinary wireless charging receiver.

[0059] Preferably, step (6.1.1) specifically includes the following steps:

[0060] (6.1.1.a) Determine that the type of communication packet received by the wireless charging transmitter on the current side is a modified communication packet;

[0061] (6.1.1.b) The system performs an XOR operation on the valid value of bit 6 of the Communication Control Error Packet (CEP) in the modified communication packet and 1.

[0062] (6.1.1.c) The system performs an XOR operation on the valid value of bit 6 of the communication power packet RPP in the modified communication packet and 1;

[0063] (6.1.1.d) The system performs an XOR operation on the valid value of bit 6 of the end charging packet EPT in the modified communication packet and 1;

[0064] (6.1.1.e) The system performs information processing by multiplying the communication power packet RPP of the modified communication packet by the preset fixed value of the first receiving end;

[0065] (6.1.1.f) The system performs matching and function adjustment operations on the modified wireless charging transmitter and the modified wireless charging receiver.

[0066] Preferably, the system performs a function adjustment operation on the wireless charging transmitter, specifically as follows:

[0067] The wireless charging transmitter utilizes the header function of the communication packets received from each receiver to achieve the following functional adjustments:

[0068] (A) The wireless charging receiver notifies the wireless charging transmitter to adjust the parameters of the wireless charging transmitter through the Communication Control Error Packet (CEP), thereby changing the voltage sensed by the wireless charging receiver. The CEP is sent only during the Power transfer phase.

[0069] (B) The wireless charging receiver sends a power packet to the wireless charging transmitter through the communication power packet RPP, thereby calculating the compensated power value of the wireless charging receiver. The communication power packet RPP is only sent during the power transfer phase.

[0070] (C) The wireless charging receiver notifies the wireless charging transmitter to stop transmitting electrical energy and to stop supplying power to the wireless charging receiver via the End Charge Packet (EPT).

[0071] (D) The wireless charging receiver sends the signal strength packet SSP to the wireless charging transmitter. This communication packet is used to indicate the coupling status between the wireless charging receiver coil and the transmitter coil. It is sent only before the id&config identification and configuration stage and is the first communication packet sent by the wireless charging receiver on the wireless charging transmitter.

[0072] (E) The wireless charging receiver sends the type identification packet TIP to the wireless charging transmitter. The content includes the receiver's Qi version number, manufacturer, and device number. It is sent only during the id&config identification and configuration stage. It is the second communication packet that the wireless charging receiver places on the wireless charging transmitter to send, so as to determine the receiver type through this communication packet.

[0073] (F) The wireless charging receiver sends the Information Configuration Packet (ICP) to the wireless charging transmitter. The configuration information sent includes the maximum power value, the number of reserved packets, and the power measurement window time. It is sent only during the id&config identification and configuration phase. It is the third communication packet that the wireless charging receiver places on the wireless charging transmitter to send, and is used to determine the receiver type through this communication packet.

[0074] This invention employs a method for preventing crosstalk in wireless charging systems. By modifying the communication transmitted from one side of the wireless charging receiver in a smart running shoe to be significantly different from that of the other side—for example, the left shoe uses the standard, unmodified communication, while the right shoe uses the modified communication—the difference in communication between the two shoes is easily discernible. This method is simple to modify and easy to implement. Simultaneously, the wireless charging transmitter also needs corresponding modifications. After successful pairing and connection between the transmitter and receiver, it first determines whether the receiver on the selected side is standard or modified. Subsequent received communication packets only process the data from the previously determined receiver; when communication packets from the other side are received, no processing is performed. This prevents crosstalk. Compared to existing technologies, this method involves minimal overall modification and has significant advantages in terms of ease of implementation and effectiveness. Attached Figure Description

[0075] Figure 1 This is a flowchart of the wireless charging transmitter communication packet processing of the present invention.

[0076] Figure 2 This is a flowchart of the communication packet processing of the wireless charging receiver of the present invention. Detailed Implementation

[0077] To more clearly describe the technical content of the present invention, the following description is provided in conjunction with specific embodiments.

[0078] Before describing the embodiments of the present invention in detail, it should be noted that, in the following, the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0079] Please see Figure 1 As shown, this method for preventing crosstalk in wireless charging systems includes the following steps:

[0080] (1) The wireless charging receiver in the wireless charging system performs a feedback operation on the wireless charging transmitter to transmit and receive communication packets based on the magnetic field energy transmitted by the wireless charging transmitter.

[0081] After the wireless charging transmitter and receiver are successfully connected, it first determines whether the receiver is a normal receiver on one side or a modified receiver with added distinguishing bits on the other side. Subsequent received communication packets are only processed from the one side identified earlier, while the communication from the other side is discarded without processing.

[0082] (2) The system enters the id&config identification and configuration stage. The wireless charging transmitter first determines the communication packet type of the receiver based on the feedback signal of the received communication packet, and then determines the wireless charging receiver type on the current side.

[0083] (3) The system enters the Power transfer stage and performs the judgment and processing operation of whether the wireless charging transmitter has received a new communication packet from the receiver.

[0084] (4) The wireless charging transmitter confirms the new receiver communication packet type based on the received new receiver communication packet.

[0085] (5) The wireless charging transmitter determines which side's wireless charging receiver sent the currently received communication packet based on the correspondence between the wireless charging receiver type and the new receiver communication packet type.

[0086] The wireless charging transmitter needs to be modified accordingly to support and correctly identify any receiver. That is, a wireless charging transmitter on the charging board can support the unmodified wireless charging receiver as well as the modified wireless charging receiver with added distinguishing features.

[0087] (6) The wireless charging transmitter performs corresponding communication packet information processing on the communication packet that matches the type of the wireless charging receiver on the determined side, so as to realize the matching connection between the wireless charging receiver and the wireless charging transmitter.

[0088] Please see Figure 2 As shown, in a preferred embodiment of the present invention, the feedback operation of sending and receiving communication packets in step (1) specifically includes:

[0089] (1.1) The system defines the receiver communication packet sent by the first wireless charging receiver with a preset distinguishing position as a modified receiver communication packet, generates a modified communication packet feedback signal, and sends it to the wireless charging transmitter.

[0090] (1.2) The system defines the receiver communication packet sent by the second wireless charging receiver as a normal receiver communication packet, generates a normal communication packet feedback signal, and sends it to the wireless charging transmitter.

[0091] In a preferred embodiment of the present invention, the receiving end communication packet specifically includes:

[0092] The termination packets are the charging packet EPT, communication power packet RPP, communication control error packet CEP, signal strength packet SSP, type identification packet TIP, and information configuration packet ICP.

[0093] In a preferred embodiment of the present invention, the generation of the modified communication packet feedback signal specifically includes the following steps:

[0094] (1.1.a) The system controls the range of valid values ​​of the Message data value of the Communication Control Error Packet (CEP) in the modified receiver communication packet to below 0x3f after removing the sign bit, keeps the valid value of the sign bit of bit7 unchanged, and performs XOR logic processing on the valid value of bit6 with 1.

[0095] (1.1.b) The system controls the Message data value of the communication power packet RPP in the modified receiver communication packet to be below 0x3f by dividing it by the first receiver preset fixed value, keeps the valid value of bit7 unchanged, and performs XOR logic processing on the valid value of bit6 with 1.

[0096] (1.1.c) The system keeps the valid value of bit 7 of the Message data value of the other communication packets in the modified receiver communication packet, excluding the Communication Control Error Packet (CEP) and the Communication Power Packet (RPP), unchanged, and performs an XOR operation on the valid value of bit 6 with 1.

[0097] (1.1.d) After the processing is completed, the first wireless charging receiver sends a modified communication packet feedback signal to the wireless charging transmitter.

[0098] In a preferred embodiment of the present invention, the generation of a general-type communication packet feedback signal specifically includes the following steps:

[0099] (1.2.a) The system controls the range of valid values ​​of the Message data value of the Communication Control Error Packet (CEP) in the ordinary receiver communication packet to below 0x3f after removing the sign bit, and keeps the valid values ​​of the sign bit 7 and the valid values ​​of bit 6 unchanged.

[0100] (1.2.b) The system controls the Message data value of the communication power packet RPP in the ordinary receiver communication packet to be below 0x3f by dividing it by the second receiver preset fixed value, and keeps the valid values ​​of bit7 and bit6 unchanged.

[0101] (1.2.c) The system will not perform any control processing on the Message data values ​​of the communication packets other than the Communication Control Error Packet (CEP) and the Communication Power Packet (RPP) in the ordinary type receiver communication packets.

[0102] (1.2.d) After the processing is completed, the second wireless charging receiver sends a normal communication packet feedback signal to the wireless charging transmitter.

[0103] In a preferred embodiment of the present invention, step (2) specifically includes the following steps:

[0104] (2.1) If the wireless charging transmitter on the current side receives the modified communication packet feedback signal, it is determined that the modified communication packet feedback signal is a modified receiver communication packet sent by the first wireless charging receiver, and it is determined that the device placed on this side is a modified wireless charging receiver; otherwise, proceed to step (2.2).

[0105] (2.2) If the wireless charging transmitter on the current side receives the ordinary communication packet feedback signal, it is determined that the ordinary communication packet feedback signal is an ordinary receiver communication packet sent by the second wireless charging receiver, and it is determined that the device placed on this side is an ordinary wireless charging receiver.

[0106] In a preferred embodiment of the present invention, step (3) specifically includes the following steps:

[0107] (3.1) The system determines whether the wireless charging transmitter has received a new communication packet from the receiver;

[0108] (3.2) If the wireless charging transmitter receives a new receiver communication packet, then continue to step (4);

[0109] (3.3) Otherwise, the wireless charging transmitter repeats the above step (3.1) to make a continuous judgment until a new receiver communication packet is received, then continues to step (4).

[0110] In a preferred embodiment of the present invention, step (4) specifically includes the following steps:

[0111] (4.1) Determine whether the wireless charging transmitter on the current side has received a new End Charge Packet (EPT). If so, further determine the information packet type of the EPT and proceed to step (5); otherwise, proceed to step (4.2).

[0112] (4.2) Determine whether the wireless charging transmitter on the current side has received a new communication power packet RPP. If so, further determine the information packet type of the communication power packet RPP and proceed to step (5); otherwise, proceed to step (4.3).

[0113] (4.3) Determine whether the wireless charging transmitter on the current side has received a new communication control error packet (CEP). If so, further determine the information packet type of the control error packet (CEP) and proceed to step (5); otherwise, return to step (3).

[0114] In practical applications, this invention modifies the data in the Message portion of the communication packets sent by the wireless charging receivers on both sides. Simultaneously, the sending end adapts to the changes made by the receiving end. In existing technologies, wireless charging mostly adopts the WPC Qi standard. The communication packet structure sent by the wireless charging receiver in the WPC Qi standard consists of four parts, as follows:

[0115] Preamble Header Message Checksum

[0116] The Preamble section consists of 11 to 25 '1's; the Header and Checksum sections consist of the following structures; and the message section consists of at least one of the following structures.

[0117] start position 1 byte of data Check bit End position

[0118] In practical applications, taking the dual wireless charging system for smart running shoes as an example, we first determine whether the receiver is a normal one or a modified one with added distinguishing bits. We use bit 6 of a 1-byte data to distinguish the left and right sides of the smart shoe. We perform an XOR operation on the valid value of the sign bit of the Message data packet of the End Charging Packet (EPT) where both the wireless charging receiver type and the information packet type are modified, and '1' (when the value of bit 6 is '0', the result of XORing with '1' is '1'; when the value of bit 6 is '1', the result of XORing with '1' is '0'). At this time, we keep the valid value of the sign bit of the Message data packet where both the wireless charging receiver type and the information packet type are normal.

[0119] Simultaneously, the size of the Message content in CEP and RPP packets needs to be adjusted accordingly. The values ​​of bits 5 (sign bit) to 0 (sign bit) should be kept below 0x3f, and bits 6 and 7 should not be used. In CEP packets, the data in the Message is a signed number; bit 7 remains the sign bit, bit 6 is used as a distinguishing bit, and bits 5 to 0 represent the absolute value of the actual CEP content, ensuring the actual CEP content value is below 0x3f. In RPP packets, the data value is first reduced to below 0x3f by dividing it by a certain value (e.g., divided by 3, then multiplied by 3 to restore the original value upon receiving it). Bit 7 remains 0, and bit 6 is used as a distinguishing bit. In EPT packets, bit 7 remains 0, bit 6 is used as a distinguishing bit, and the Message data only occupies bits 3 to 0, requiring no special processing. In other communication packets, bit 6 in the Message data is also used as a distinguishing bit and inverted; if bit 6 was 0 before modification, it is changed to 1; if bit 6 was 1 before modification, it is changed to 0.

[0120] In practical applications, according to the above modification principles, the determination of the information packet type of the EPT termination charging pack in step (4.1) is specifically as follows:

[0121] The information packet type of the End Charge Packet (EPT) is determined according to the following rules:

[0122] If the valid value of bit 6 of the Message data value in the End Charge Packet (EPT) is 0, then the packet type of the current End Charge Packet (EPT) is determined to be a normal packet; otherwise, the packet type of the current End Charge Packet (EPT) is determined to be a modified packet.

[0123] In a preferred embodiment of the present invention, the determination of the information packet type of the communication power packet RPP in step (4.2) specifically includes:

[0124] The packet type of the RPP (Reference Power Packet) is determined according to the following rules:

[0125] If the valid value of bit 6 of the Message data value in the communication power packet RPP is 0, then the information packet type of the current communication power packet RPP is determined to be a normal information packet; otherwise, the information packet type of the current communication power packet RPP is determined to be a modified information packet.

[0126] In a preferred embodiment of the present invention, the determination of the information packet type of the Communication Control Error Packet (CEP) in step (4.3) specifically involves:

[0127] The information packet type of the Communication Control Error Packet (CEP) shall be determined according to the following rules:

[0128] If the valid value of bit 7 of the Message data value in the Communication Control Error Packet (CEP) is equal to the valid value of bit 6, then the information packet type of the current Communication Control Error Packet (CEP) is determined to be a normal information packet; otherwise, the information packet type of the current Communication Control Error Packet (CEP) is determined to be a modified information packet.

[0129] In a preferred embodiment of the present invention, step (5) specifically includes the following steps:

[0130] (5.1) The wireless charging transmitter determines whether the type of the wireless charging receiver on the current side is the same as the type of the new receiver communication packet received.

[0131] (5.2) If yes, then further determine which side's wireless charging receiver sent the new communication packet feedback signal received by the wireless charging transmitter on the current side; if no, proceed to step (5.3).

[0132] (5.3) Discard the communication packet feedback signal received by the wireless charging transmitter on the current side and return to step (3).

[0133] In a preferred embodiment of the present invention, step (6) specifically includes the following steps:

[0134] (6.1) If the communication packet feedback signal received by the wireless charging transmitter on the current side is a modified communication packet feedback signal, then proceed to step (6.1.1); otherwise, proceed to step (6.2).

[0135] (6.2) Determine that the type of communication packet received by the wireless charging transmitter on the current side is a normal communication packet, and proceed to step (6.3);

[0136] (6.3) The system performs information processing by multiplying the communication power packet RPP of the ordinary communication packet by the preset fixed value of the second receiving end;

[0137] (6.4) The system performs matching and function adjustment operations on the ordinary wireless charging transmitter and the ordinary wireless charging receiver.

[0138] In a preferred embodiment of the present invention, step (6.1.1) specifically includes the following steps:

[0139] (6.1.1.a) Determine that the type of communication packet received by the wireless charging transmitter on the current side is a modified communication packet;

[0140] (6.1.1.b) The system performs an XOR operation on the valid value of bit 6 of the Communication Control Error Packet (CEP) in the modified communication packet and 1.

[0141] (6.1.1.c) The system performs an XOR operation on the valid value of bit 6 of the communication power packet RPP in the modified communication packet and 1;

[0142] (6.1.1.d) The system performs an XOR operation on the valid value of bit 6 of the end charging packet EPT in the modified communication packet and 1;

[0143] (6.1.1.e) The system performs information processing by multiplying the communication power packet RPP of the modified communication packet by the preset fixed value of the first receiving end;

[0144] (6.1.1.f) The system performs matching and function adjustment operations on the modified wireless charging transmitter and the modified wireless charging receiver.

[0145] In this way, by using the logical processing results of the distinguishing bits, the communication information sent by the determining side can be clearly distinguished from that of the other side, thereby effectively preventing the occurrence of communication crosstalk.

[0146] In a preferred embodiment of the present invention, the system performs a function adjustment operation on the wireless charging transmitter, specifically as follows:

[0147] The wireless charging transmitter utilizes the header function of the communication packets received from each receiver to achieve the following functional adjustments:

[0148] (A) The wireless charging receiver notifies the wireless charging transmitter to adjust the parameters of the wireless charging transmitter through the Communication Control Error Packet (CEP), thereby changing the voltage sensed by the wireless charging receiver. The CEP is sent only during the Power transfer phase.

[0149] (B) The wireless charging receiver sends a power packet to the wireless charging transmitter through the communication power packet RPP, thereby calculating the compensated power value of the wireless charging receiver. The communication power packet RPP is only sent during the power transfer phase.

[0150] (C) The wireless charging receiver notifies the wireless charging transmitter to stop transmitting electrical energy and to stop supplying power to the wireless charging receiver via the End Charge Packet (EPT).

[0151] (D) The wireless charging receiver sends the signal strength packet SSP to the wireless charging transmitter. This communication packet is used to indicate the coupling status between the wireless charging receiver coil and the transmitter coil. It is sent only before the id&config identification and configuration stage and is the first communication packet sent by the wireless charging receiver on the wireless charging transmitter.

[0152] (E) The wireless charging receiver sends the type identification packet TIP to the wireless charging transmitter. The content includes the receiver's Qi version number, manufacturer, and device number. It is sent only during the id&config identification and configuration stage. It is the second communication packet that the wireless charging receiver places on the wireless charging transmitter to send, so as to determine the receiver type through this communication packet.

[0153] (F) The wireless charging receiver sends the Information Configuration Packet (ICP) to the wireless charging transmitter. The configuration information sent includes the maximum power value, the number of reserved packets, and the power measurement window time. It is sent only during the id&config identification and configuration phase. It is the third communication packet that the wireless charging receiver places on the wireless charging transmitter to send, and is used to determine the receiver type through this communication packet.

[0154] Different values ​​in the header indicate different uses. The commonly used communication packets for wireless charging in the WPC Qi standard are as follows:

[0155]

[0156]

[0157] The above method uses different values ​​in the Header section to represent different purposes, thereby utilizing the functions of different communication packets during the transmission of communication packets to receive, judge, and match the corresponding sender, thus minimizing the problem of communication crosstalk.

[0158] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0159] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution device.

[0160] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0161] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0162] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0163] This invention employs a method for preventing crosstalk in wireless charging systems. By modifying the communication transmitted from one side of the wireless charging receiver in a smart running shoe to be significantly different from that of the other side—for example, the left shoe uses the standard, unmodified communication, while the right shoe uses the modified communication—the difference in communication between the two shoes is easily discernible. This method is simple to modify and easy to implement. Simultaneously, the wireless charging transmitter also needs corresponding modifications. After successful pairing and connection between the transmitter and receiver, it first determines whether the receiver on the selected side is standard or modified. Subsequent received communication packets only process the data from the previously determined receiver; when communication packets from the other side are received, no processing is performed. This prevents crosstalk. Compared to existing technologies, this method involves minimal overall modification and has significant advantages in terms of ease of implementation and effectiveness.

[0164] In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A method for preventing crosstalk in wireless charging systems, characterized in that, The method includes the following steps: (1) The wireless charging receiver in the wireless charging system performs a feedback operation on the wireless charging transmitter to transmit and receive communication packets based on the magnetic field energy transmitted by the wireless charging transmitter. (2) When the system enters the id&config identification and configuration stage, the wireless charging transmitter first determines the communication packet type of the receiver based on the feedback signal of the received communication packet, and then determines the type of the wireless charging receiver on the current side. (3) The system enters the Power transfer stage and performs the judgment and processing operation of whether the wireless charging transmitter has received a new communication packet from the receiver. (4) The wireless charging transmitter confirms the new receiver communication packet type based on the received new receiver communication packet. (5) The wireless charging transmitter determines which side's wireless charging receiver sent the currently received communication packet based on the correspondence between the wireless charging receiver type and the new receiver communication packet type. (6) The wireless charging transmitter performs corresponding communication packet information processing on the communication packet that matches the type of the wireless charging receiver on the determined side, so as to realize the matching connection between the wireless charging receiver and the wireless charging transmitter. The specific steps of step (1) involving the execution of feedback operations for sending and receiving communication packets are as follows: (1.1) The system defines the receiver communication packet sent by the first wireless charging receiver with a preset distinguishing position as a modified receiver communication packet, generates a modified communication packet feedback signal, and sends it to the wireless charging transmitter. (1.2) The system defines the receiver communication packet sent by the second wireless charging receiver as a normal receiver communication packet, generates a normal communication packet feedback signal, and sends it to the wireless charging transmitter.

2. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 1, characterized in that, The receiving end communication packet specifically includes: The termination packets are the charging packet EPT, communication power packet RPP, communication control error packet CEP, signal strength packet SSP, type identification packet TIP, and information configuration packet ICP.

3. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 2, characterized in that, The generation of the modified communication packet feedback signal specifically includes the following steps: (1.1.a) The system controls the range of valid values ​​of the Message data value of the Communication Control Error Packet (CEP) in the modified receiver communication packet to below 0x3f after removing the sign bit, keeps the valid value of the sign bit of bit7 unchanged, and performs XOR logic processing on the valid value of bit6 with 1. (1.1.b) The system controls the Message data value of the communication power packet RPP in the modified receiver communication packet to be below 0x3f by dividing it by the first receiver preset fixed value, keeps the valid value of bit7 unchanged, and performs XOR logic processing on the valid value of bit6 with 1. (1.1.c) The system keeps the valid value of bit 7 of the Message data value of the other communication packets in the modified receiver communication packet, excluding the Communication Control Error Packet (CEP) and the Communication Power Packet (RPP), unchanged, and performs an XOR operation on the valid value of bit 6 with 1. (1.1.d) After the processing is completed, the first wireless charging receiver sends a modified communication packet feedback signal to the wireless charging transmitter.

4. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 2 or 3, characterized in that, The generation of a standard communication packet feedback signal specifically includes the following steps: (1.2.a) The system controls the range of valid values ​​of the Message data value of the Communication Control Error Packet (CEP) in the ordinary receiver communication packet to below 0x3f after removing the sign bit, and keeps the valid values ​​of the sign bit (bit 7) and bit 6 unchanged. (1.2.b) The system controls the Message data value of the communication power packet RPP in the ordinary receiver communication packet to be below 0x3f by dividing it by the second receiver preset fixed value, and keeps the valid values ​​of bit7 and bit6 unchanged. (1.2.c) The system will not perform any control processing on the Message data values ​​of the communication packets other than the Communication Control Error Packet (CEP) and the Communication Power Packet (RPP) in the ordinary type receiver communication packets. (1.2.d) After the processing is completed, the second wireless charging receiver sends a normal communication packet feedback signal to the wireless charging transmitter.

5. The method for preventing crosstalk in a wireless charging system according to claim 1, characterized in that, Step (2) specifically includes the following steps: (2.1) If the wireless charging transmitter on the current side receives the modified communication packet feedback signal, it is determined that the modified communication packet feedback signal is a modified receiver communication packet sent by the first wireless charging receiver, and it is determined that the device placed on this side is a modified wireless charging receiver; otherwise, proceed to step (2.2). (2.2) If the wireless charging transmitter on the current side receives the ordinary communication packet feedback signal, it is determined that the ordinary communication packet feedback signal is an ordinary receiver communication packet sent by the second wireless charging receiver, and it is determined that the device placed on this side is an ordinary wireless charging receiver.

6. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 1, characterized in that, Step (3) specifically includes the following steps: (3.1) The system determines whether the wireless charging transmitter has received a new communication packet from the receiver; (3.2) If the wireless charging transmitter receives a new receiver communication packet, then continue to step (4). (3.3) Otherwise, the wireless charging transmitter repeats the above step (3.1) to make a continuous judgment until a new receiver communication packet is received, then continues to step (4).

7. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 2, characterized in that, Step (4) specifically includes the following steps: (4.1) Determine whether the wireless charging transmitter on the current side has received a new End Charge Packet (EPT). If so, further determine the information packet type of the End Charge Packet (EPT) and proceed to step (5); otherwise, proceed to step (4.2). (4.2) Determine whether the wireless charging transmitter on the current side has received a new communication power packet RPP. If so, further determine the information packet type of the communication power packet RPP and proceed to step (5); otherwise, proceed to step (4.3). (4.3) Determine whether the wireless charging transmitter on the current side has received a new communication control error packet (CEP). If so, further determine the information packet type of the control error packet (CEP) and proceed to step (5); otherwise, return to step (3).

8. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 7, characterized in that, The determination of the information packet type of the EPT termination charging package in step (4.1) is specifically as follows: The information packet type of the End Charge Packet (EPT) is determined according to the following rules: If bit 6 of the Message data value in the End Charge Packet (EPT) is 0, then the packet type of the current End Charge Packet (EPT) is determined to be a normal packet; otherwise, the packet type of the current End Charge Packet (EPT) is determined to be a modified packet; and / or The determination of the information packet type of the communication power packet RPP in step (4.2) is specifically as follows: The packet type of the RPP (Reference Power Packet) is determined according to the following rules: If bit 6 of the Message data value in the RPP (Reference Power Packet) is validly 0, then the packet type of the current RPP is determined to be a normal packet; otherwise, the packet type is determined to be a modified packet. The determination of the information packet type of the Communication Control Error Packet (CEP) in step (4.3) is specifically as follows: The information packet type of the Communication Control Error Packet (CEP) shall be determined according to the following rules: If the valid value of bit 7 of the Message data value in the Communication Control Error Packet (CEP) is equal to the valid value of bit 6, then the information packet type of the current Communication Control Error Packet (CEP) is determined to be a normal information packet; otherwise, the information packet type of the current Communication Control Error Packet (CEP) is determined to be a modified information packet.

9. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 8, characterized in that, Step (5) specifically includes the following steps: (5.1) The wireless charging transmitter determines whether the type of the wireless charging receiver on the current side is the same as the type of the new receiver communication packet received. (5.2) If yes, then further determine which side's wireless charging receiver sent the new communication packet feedback signal received by the wireless charging transmitter on the current side; if no, proceed to step (5.3). (5.3) Discard the communication packet feedback signal received by the wireless charging transmitter on the current side and return to step (3).

10. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 9, characterized in that, Step (6) specifically includes the following steps: (6.1) If the communication packet feedback signal received by the wireless charging transmitter on the current side is a modified communication packet feedback signal, then proceed to step (6.1.1); otherwise, proceed to step (6.2). (6.2) Determine that the type of communication packet received by the wireless charging transmitter on the current side is a normal communication packet, and proceed to step (6.3). (6.3) The system performs information processing by multiplying the communication power packet RPP of the ordinary communication packet by the preset fixed value of the second wireless charging receiver; (6.4) The system performs matching and function adjustment operations on the ordinary wireless charging transmitter and the ordinary wireless charging receiver.

11. The method for implementing communication anti-crosstalk in the wireless charging system according to claim 10, characterized in that, The aforementioned step (6.1.1) specifically includes the following steps: (6.1.1.a) Determine that the type of communication packet received by the wireless charging transmitter on the current side is a modified communication packet; (6.1.1.b) The system performs an XOR operation on bit 6 of the Communication Control Error Packet (CEP) in the modified communication packet and 1. (6.1.1.c) The system performs an XOR operation on bit 6 of the communication power packet RPP in the modified communication packet and 1; (6.1.1.d) The system performs an XOR operation on the valid value of bit 6 of the end charging packet EPT in the modified communication packet and 1; (6.1.1.e) The system performs information processing by multiplying the communication power packet RPP of the modified communication packet by a preset fixed value of the first wireless charging receiver; (6.1.1.f) The system performs matching and function adjustment operations on the modified wireless charging transmitter and the modified wireless charging receiver.

12. The method for implementing communication anti-crosstalk in a wireless charging system according to claim 11, characterized in that, The system performs a function adjustment operation on the wireless charging transmitter, specifically as follows: The wireless charging transmitter utilizes the header function of the communication packets received from each receiver to achieve the following functional adjustments: (A) The wireless charging receiver notifies the wireless charging transmitter to adjust the parameters of the wireless charging transmitter through the Communication Control Error Packet (CEP), thereby changing the voltage sensed by the wireless charging receiver. The CEP is sent only during the Power transfer phase. (B) The wireless charging receiver sends a power packet to the wireless charging transmitter through the communication power packet RPP, thereby calculating the compensated power value of the wireless charging receiver. The communication power packet RPP is only sent during the power transfer stage. (C) The wireless charging receiver notifies the wireless charging transmitter to stop transmitting electrical energy and to stop supplying power to the wireless charging receiver via the End Charge Packet (EPT). (D) The wireless charging receiver sends the signal strength packet SSP to the wireless charging transmitter. This communication packet is used to indicate the coupling status between the coil of the wireless charging receiver and the coil of the transmitter. It is sent only before the id&config identification and configuration stage and is the first communication packet sent by the wireless charging receiver on the wireless charging transmitter. (E) The wireless charging receiver sends the type identification packet TIP to the wireless charging transmitter. The content includes the receiver's Qi version number, manufacturer, and device number. It is sent only during the id&config identification and configuration stage. It is the second communication packet that the wireless charging receiver places on the wireless charging transmitter to send, and is used to determine the receiver type through this communication packet. (F) The wireless charging receiver sends the Information Configuration Packet (ICP) to the wireless charging transmitter. The configuration information sent includes the maximum power value, the number of reserved packets, and the power measurement window time. It is sent only during the id&config identification and configuration stage. It is the third communication packet that the wireless charging receiver places on the wireless charging transmitter to send, and is used to determine the receiver type through this communication packet.

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