技术领域Technical Field
本发明属于标签防碰撞技术领域，特别涉及一种可防碰撞的基于射频能量收集标签芯片的单工通信系统和标签芯片的防碰撞方法。The present invention belongs to the technical field of tag anti-collision, and in particular relates to a simplex communication system based on a radio frequency energy collection tag chip capable of anti-collision and an anti-collision method for the tag chip.
背景技术Background technique
基于射频能量收集的标签芯片是无线通信和物联网中常用的设备之一，能够实现能量收集和数据通信。然而，在大规模标签芯片部署中，碰撞问题是一个关键挑战。碰撞会导致通信质量下降和数据传输错误，影响系统的可靠性和性能。因此，开发一种有效的标签芯片防碰撞方法和系统具有重要意义。Tag chips based on RF energy harvesting are one of the commonly used devices in wireless communications and the Internet of Things, which can achieve energy harvesting and data communication. However, in large-scale tag chip deployment, the collision problem is a key challenge. Collisions can lead to decreased communication quality and data transmission errors, affecting the reliability and performance of the system. Therefore, it is of great significance to develop an effective tag chip anti-collision method and system.
标签芯片防碰撞技术的主要目标是同时处理多个标签芯片的信号，以减少碰撞，提高系统的通信效率和可靠性。有效的防碰撞方法能够提高识别率：标签芯片防碰撞方法能够确保唯一识别每个标签芯片，并准确地提取所需数据。这有助于提高物联网系统的准确性和可靠性；提高传输效率：标签芯片防碰撞方法可以使多个标签芯片同时进行通信和数据传输，而无需等待其他标签芯片完成通信。这有效地提高了系统的传输效率和响应速度；降低故障率：通过有效的防碰撞方法，可以避免标签芯片之间的相互干扰和冲突，减少数据传输错误和系统故障的可能性。The main goal of tag chip anti-collision technology is to process the signals of multiple tag chips at the same time to reduce collisions and improve the communication efficiency and reliability of the system. An effective anti-collision method can improve the recognition rate: the tag chip anti-collision method can ensure the unique identification of each tag chip and accurately extract the required data. This helps to improve the accuracy and reliability of the IoT system; improve transmission efficiency: the tag chip anti-collision method can enable multiple tag chips to communicate and transmit data at the same time without waiting for other tag chips to complete communication. This effectively improves the transmission efficiency and response speed of the system; reduce the failure rate: through an effective anti-collision method, mutual interference and conflict between tag chips can be avoided, reducing the possibility of data transmission errors and system failures.
RFID系统采用了以下几种主要的防碰撞方案：The RFID system uses the following main anti-collision solutions:
时隙(Slotting)方案：标签被分配到不同的时间时隙，每个时隙只允许一个标签进行通信。读写器依次轮流向每个时隙发出查询，以识别标签。这样可以确保每个标签都有机会与读写器进行通信，但会导致系统的响应时间延长；随机(Randomized)方案：标签在收到读写器的查询后，随机选取一个时间延迟后进行回应。这样可以减少多个标签同时回应的冲突，但也可能出现回应碰撞的情况。仲裁(Collision Arbitration)方案：标签收到读写器的查询后，在特定时间窗口内回应，并通过碰撞检测机制检测是否发生碰撞。如果发生碰撞，标签会等待随机时间后再次回应，以减少碰撞的可能性。Slotting scheme: Tags are assigned to different time slots, and only one tag is allowed to communicate in each time slot. The reader takes turns to send queries to each time slot to identify the tag. This ensures that each tag has the opportunity to communicate with the reader, but it will increase the response time of the system; Randomized scheme: After receiving the query from the reader, the tag randomly selects a time delay to respond. This can reduce the conflict of multiple tags responding at the same time, but there may also be a collision of responses. Arbitration scheme: After receiving the query from the reader, the tag responds within a specific time window and detects whether a collision occurs through a collision detection mechanism. If a collision occurs, the tag will wait for a random time before responding again to reduce the possibility of a collision.
尽管RFID系统采取了防碰撞方案来处理多标签情况，但仍然存在一些限制：吞吐量受限，多标签情况下，RFID系统需要额外的时间来处理防碰撞，这会导致系统的吞吐量降低；当标签密度增加时，标签之间的干扰和碰撞会增加，导致系统的性能下降，因此，在高密度场景下，可能需要调整读写器和标签的工作参数，以提高系统的可靠性；在某些情况下，即使采用了优化的防碰撞方案，仍然无法完全避免碰撞问题。特别是在标签数量众多且密度很高的环境中，系统可能无法准确区分和定位每个标签。Although the RFID system has adopted an anti-collision solution to handle multi-tag situations, there are still some limitations: throughput is limited. In the case of multiple tags, the RFID system needs extra time to handle anti-collision, which will reduce the throughput of the system; when the tag density increases, the interference and collision between tags will increase, resulting in a decrease in system performance. Therefore, in high-density scenarios, it may be necessary to adjust the working parameters of the reader and tag to improve the reliability of the system; in some cases, even if an optimized anti-collision solution is adopted, the collision problem cannot be completely avoided. Especially in an environment with a large number of tags and a high density, the system may not be able to accurately distinguish and locate each tag.
发明内容Summary of the invention
本发明的目的是针对现有技术的缺陷，提供一种可防碰撞的基于射频能量收集标签芯片的单工通信系统和标签芯片的防碰撞方法。The purpose of the present invention is to provide a collision-proof simplex communication system based on a radio frequency energy collection tag chip and an anti-collision method for the tag chip in view of the defects of the prior art.
为了实现上述目的，本发明采用以下技术方案：一种可防碰撞的基于射频能量收集标签芯片的单工通信系统，包括：网关和射频能量收集芯片；In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a collision-proof simplex communication system based on a radio frequency energy collection tag chip, comprising: a gateway and a radio frequency energy collection chip;
所述网关用于为射频能量收集标签芯片提供充能和调制载波，按照设定的时间发送传名码进行轮询，并收集处理来自射频能量收集标签芯片传来的数据，同时和外部网络进行交互，将数据传输到目标终端；The gateway is used to provide charging and carrier modulation for the RF energy collection tag chip, send a name transmission code for polling at a set time, collect and process data from the RF energy collection tag chip, interact with the external network, and transmit the data to the target terminal;
所述射频能量收集标签芯片用于收集网关发送的充能和调制载波进行充电，在接收网关传来的传名码后进行匹配，匹配传名码后，将芯片唯一ID信息发送给网关。The radio frequency energy collection tag chip is used to collect the charging energy and modulate the carrier sent by the gateway for charging, and match it after receiving the name transmission code sent by the gateway. After matching the name transmission code, the chip unique ID information is sent to the gateway.
进一步的，射频能量收集标签芯片包括射频能量收集模块、超级电容、数字基带模块，反向散射调制模块、传名码匹配模块和存储模块；Furthermore, the radio frequency energy collection tag chip includes a radio frequency energy collection module, a super capacitor, a digital baseband module, a backscatter modulation module, a name transmission code matching module and a storage module;
其中所述射频能量收集模块用于收集外部射频信号并将其转换为直流电流；The radio frequency energy collection module is used to collect external radio frequency signals and convert them into direct current;
所述超级电容用于利用转换的直流电流进行充电，以供整个芯片使用；The supercapacitor is used to charge with the converted direct current for use by the entire chip;
所述存储模块用于存储标签的唯一ID信息，以及待发送的数据和接收到的数据；The storage module is used to store the unique ID information of the tag, as well as the data to be sent and the data received;
所述数字基带模块用于读取存储模块内的信息，通过读取存储模块中的ID信息，将其转换为适合传输的调制信号；The digital baseband module is used to read the information in the storage module, and convert the ID information in the storage module into a modulation signal suitable for transmission;
所述传名码匹配模块用于将的标签芯片唯一ID信息生成传名码，并与网关传来的充能信号中的传名码进行匹配；The name transmission code matching module is used to generate a name transmission code from the unique ID information of the tag chip, and match it with the name transmission code in the charging signal sent by the gateway;
所述反向散射调制模块用于在传名码匹配后，将数字基带模块产生的调制信号转换为对应的波形信号，发送给网关。The backscatter modulation module is used to convert the modulation signal generated by the digital baseband module into a corresponding waveform signal after the name transmission code is matched, and send it to the gateway.
进一步的，传名码的生成采用以下步骤：Furthermore, the name transmission code is generated by the following steps:
读取存储模块中的表征标签芯片的唯一ID信息，信息长度为N；Read the unique ID information representing the tag chip in the storage module, where the information length is N;
选择相应的编码方式及低位码长度；Select the corresponding encoding method and low-order code length;
根据编码方式将唯一ID信息生成唯一低位编码。The unique ID information is converted into a unique low-order code according to the encoding method.
进一步的，编码方式采用哈希函数。Furthermore, the encoding method adopts a hash function.
进一步的，将唯一ID信息生成唯一低位编码具体采用以下步骤：Furthermore, the unique ID information is generated into a unique low-order code by specifically adopting the following steps:
将唯一ID信息分割为数个固定大小的块；Split the unique ID information into several fixed-size blocks;
将每个块按照哈希函数的规则转换为哈希值，将所有块的哈希值按顺序连接起来，形成最终的哈希值；Convert each block into a hash value according to the rules of the hash function, and connect the hash values of all blocks in sequence to form the final hash value;
用加盐的方式，在哈希值中引入额外的随机值进行混淆，得到高位编码的低位唯一编码。By adding salt, an additional random value is introduced into the hash value for confusion, and a unique low-order code of the high-order code is obtained.
进一步的，射频能量收集标签芯片还包括能量管理模块，用于对收集到的能量进行管理和存储，控制其他模块的工作状态和能量供给，确保标签芯片正常运行。Furthermore, the radio frequency energy collection tag chip also includes an energy management module for managing and storing the collected energy, controlling the working status and energy supply of other modules, and ensuring the normal operation of the tag chip.
进一步的，射频能量收集模块包括：天线、阻抗匹配单元和整流倍压电路；所述天线用于收集外部射频信号并传递给整流倍压电路；所述阻抗匹配单元用于将天线的高阻抗转换为整流倍压电路所需的低阻抗，从而最大程度地提高能量传输效率；所述整流倍压电路用于将天线的高频交流信号转换为直流电压。Furthermore, the RF energy collection module includes: an antenna, an impedance matching unit and a rectifier and voltage doubler circuit; the antenna is used to collect external RF signals and transmit them to the rectifier and voltage doubler circuit; the impedance matching unit is used to convert the high impedance of the antenna into the low impedance required by the rectifier and voltage doubler circuit, thereby maximizing the energy transmission efficiency; the rectifier and voltage doubler circuit is used to convert the high-frequency AC signal of the antenna into a DC voltage.
一种标签芯片防碰撞方法，采用上述的可防碰撞的基于射频能量收集标签芯片的单工通信系统，包括以下步骤：A tag chip anti-collision method adopts the above-mentioned anti-collision simplex communication system based on radio frequency energy collection tag chip, comprising the following steps:
(1)每个标签芯片储存唯一ID信息，并将唯一ID信息生成唯一传名码；(1) Each tag chip stores unique ID information and generates a unique ID code from the unique ID information;
(2)网关为射频能量收集标签芯片提供充能和调制载波，按照设定的时间发送传名码进行轮询；(2) The gateway provides charging and carrier modulation for the RF energy collection tag chip, and sends the name transmission code for polling at the set time;
(3)标签芯片接收网关传来的传名码后进行匹配，匹配传名码后，将芯片唯一ID信息发送给网关。(3) The tag chip receives the name transmission code from the gateway and performs matching. After matching the name transmission code, the unique ID information of the chip is sent to the gateway.
现有技术与本方法进行对比，存在缺点如下：Compared with this method, the prior art has the following disadvantages:
1、传统RFID防碰撞方案，存在碰撞和冲突的风险，多个标签同时传输数据，导致数据损坏和读取错误1. Traditional RFID anti-collision solutions have the risk of collision and conflict. Multiple tags transmit data at the same time, resulting in data corruption and reading errors.
2、传统RFID标签防碰撞方案，需要标签和网关双向通信确认，对芯片的架构和实时性有较高要求。2. Traditional RFID tag anti-collision solutions require two-way communication confirmation between the tag and the gateway, and have high requirements on the chip architecture and real-time performance.
3、传统标签防碰撞方案，芯片非实时、芯片充能与工作存在占空比情况下，无法实现标签的防碰撞检测；3. In the traditional tag anti-collision solution, the chip is not in real time, and there is a duty cycle between chip charging and working, so the tag anti-collision detection cannot be realized;
4、能量密度大的区域，标签传输频次高，挤占低频标签，导致无法识别能量较小区域的低频标签；4. In areas with high energy density, the tag transmission frequency is high, which squeezes out low-frequency tags, resulting in the inability to identify low-frequency tags in areas with lower energy;
5、传统的传名码点亮方案需要芯片与网关在安装过程中一一对应，安装错误率高，过程繁琐且开销大；5. The traditional name code lighting solution requires the chip and the gateway to correspond one to one during the installation process, which has a high installation error rate, a cumbersome process and high costs;
本发明的优点是：The advantages of the present invention are:
1、利用芯片Id的唯一性，生成唯一传名码，解决了批量射频能量收集芯片的碰撞问题，相比传统方案，时延更低；1. Using the uniqueness of the chip ID to generate a unique name transmission code, the collision problem of batch RF energy collection chips is solved. Compared with traditional solutions, the delay is lower;
2、解决射频能量芯片无法双向通信的场景下，芯片端传名码自动生成及网关端自动点亮轮询方案，解决了碰撞问题。相比人工烧写传名码，省时省力；2. To solve the problem that the RF energy chip cannot communicate bidirectionally, the chip-side name transmission code is automatically generated and the gateway-side automatically lights up the polling solution, which solves the collision problem. Compared with manual burning of the name transmission code, it saves time and effort;
3、使射频能量收集芯片实现充能与通信分开，并且能够非实时工作，本芯片方案大大提高了射频能量收集芯片的极限灵敏度，与此同时，解决了该场景下带来的更具挑战的射频能量收集芯片的标签防碰撞问题。3. The RF energy harvesting chip can separate charging and communication and work in non-real time. This chip solution greatly improves the ultimate sensitivity of the RF energy harvesting chip. At the same time, it solves the more challenging tag anti-collision problem of the RF energy harvesting chip brought about by this scenario.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是实施例基于射频能量收集的标签芯片防碰撞系统框架图。FIG1 is a framework diagram of a tag chip anti-collision system based on radio frequency energy collection according to an embodiment.
图2是实施例传名码自动生成流程图。FIG. 2 is a flowchart of automatic generation of a name transfer code according to an embodiment of the present invention.
图3是实施例传名码激活时序充能方波图。FIG. 3 is a square wave diagram of the activation timing of the name transmission code in the embodiment.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatuses.
一种基于射频能量收集的标签芯片防碰撞系统如图1，网关和射频能量收集芯片，射频能量收集芯片包括射频能量收集模块、超级电容、能量管理模块，数字基带模块，反向散射调制模块、传名码匹配模块，存储模块。射频能量收集模块、超级电容和能量管理模块依次相连，能量管理模块与数字基带模块、反向散射调制模块和传明匹配模块和存储模块相连。A tag chip anti-collision system based on RF energy collection is shown in Figure 1, including a gateway and a RF energy collection chip. The RF energy collection chip includes a RF energy collection module, a super capacitor, an energy management module, a digital baseband module, a backscatter modulation module, a name transmission code matching module, and a storage module. The RF energy collection module, the super capacitor, and the energy management module are connected in sequence, and the energy management module is connected to the digital baseband module, the backscatter modulation module, the name transmission code matching module, and the storage module.
射频能量收集模块，包括天线、阻抗匹配单元和整流倍压电路，天线用于收集外部射频信号并将其转换为电流，传递给整流倍压电路；根据射频场景和芯片阻抗特性设计天线，天线在工作频段内有较高的能量接受效率(S11曲线>20dB)，极化方式接近圆极化，馈点与芯片直连，天线与芯片阻抗形成共轭匹配。The RF energy collection module includes an antenna, an impedance matching unit and a rectifier-voltage doubler circuit. The antenna is used to collect external RF signals and convert them into current, which is then transmitted to the rectifier-voltage doubler circuit. The antenna is designed according to the RF scenario and the chip impedance characteristics. The antenna has a high energy receiving efficiency (S11 curve>20dB) within the working frequency band, and the polarization mode is close to circular polarization. The feed point is directly connected to the chip, and the antenna and chip impedance form a conjugate match.
阻抗匹配单元用于将天线的高阻抗转换为整流倍压电路所需的低阻抗，从而最大程度地提高能量传输效率。整流倍压电路将天线的高频交流信号转换为直流电压，以将能量从射频信号中提取出来，倍压使得输出的直流电压能够适应后续电路和超级电容的充电需求，通过将射频能源转换为较高的直流电压，可以为电容充电以供后续模块使用。The impedance matching unit is used to convert the high impedance of the antenna into the low impedance required by the rectifier and voltage doubler circuit, thereby maximizing the energy transmission efficiency. The rectifier and voltage doubler circuit converts the high-frequency AC signal of the antenna into a DC voltage to extract energy from the RF signal. The voltage doubler enables the output DC voltage to meet the charging requirements of subsequent circuits and supercapacitors. By converting RF energy into a higher DC voltage, the capacitor can be charged for use by subsequent modules.
根据芯片各模块工作需求，设计并选型合适容量和工业的超级电容；超级电容需要满足整个工作电路的一次完整工作的供电，并尽可能降低对充电电压的小的限制。According to the working requirements of each module of the chip, design and select supercapacitors with appropriate capacity and industry; the supercapacitor needs to meet the power supply of a complete working circuit and reduce the minimum limit on the charging voltage as much as possible.
能量管理模块：用于对收集到的能量进行管理和存储，控制其他模块的工作状态和能量供给，确保标签芯片正常运行。能量管理模块实现高效率的直流到直流(DC－DC)的转换、管理和存储，管理各个电路的工作开关状态，产生各节点需要的电源电压，同时具有宽输入功率/电压范围的管理能力。其中包括：电压比较电路，XL振荡电路，电压基准电路，低压线性稳压器(LDO)电路。Energy management module: used to manage and store the collected energy, control the working status and energy supply of other modules, and ensure the normal operation of the tag chip. The energy management module realizes high-efficiency DC-DC conversion, management and storage, manages the working switch status of each circuit, generates the power supply voltage required by each node, and has the management capability of a wide input power/voltage range. It includes: voltage comparison circuit, XL oscillation circuit, voltage reference circuit, low voltage linear regulator (LDO) circuit.
数字基带模块：用于读取存储模块内的信息，通过读取存储模块中的ID数据，将其转换为适合传输的调制信号，为后续的信号传输做准备。主要包含时钟电路，时序控制模块、数据调制模块。Ring Amplifier会退化为一个环形振荡器并不断的震荡下去。对于任何输入值Vin在“dead-zone”范围的值，Digital baseband module: used to read the information in the storage module, and convert the ID data in the storage module into a modulation signal suitable for transmission to prepare for subsequent signal transmission. It mainly includes clock circuit, timing control module, and data modulation module. The Ring Amplifier will degenerate into a ring oscillator and continue to oscillate. For any input value Vin in the "dead-zone" range,
时钟生成电路负责生成比特时钟信号，以保证数据在接收端能够正确解调；该模块需要根据时钟频率和数据速率的要求，产生相应的比特时钟，用于数据的采样和解调。数据调制模块负责实现ASK或FSK调制，该模块接收来自数据存储器的数据，并根据预定的调制算法进行波形调制，输出对应的调制信号。The clock generation circuit is responsible for generating the bit clock signal to ensure that the data can be correctly demodulated at the receiving end; this module needs to generate the corresponding bit clock for data sampling and demodulation according to the requirements of the clock frequency and data rate. The data modulation module is responsible for implementing ASK or FSK modulation. This module receives data from the data storage, performs waveform modulation according to the predetermined modulation algorithm, and outputs the corresponding modulation signal.
存储模块：用于存储系统内的信息，包括待发送的数据和接收到的数据，在标签芯片中为标签的唯一ID信号。Storage module: used to store information within the system, including data to be sent and received, and in the tag chip it is the unique ID signal of the tag.
反向散射调制模块：负责将数字基带模块产生的调制信号转换为对应的波形信号。反向散射模块接受数字基带模块的信号，将信号的“0”、“1”控制阻抗匹配开关，使天线端对网关传输的载波信号，进行不同程度的反射，给网关传递ID信号。Backscatter modulation module: responsible for converting the modulation signal generated by the digital baseband module into the corresponding waveform signal. The backscatter module receives the signal from the digital baseband module, controls the impedance matching switch with the "0" and "1" of the signal, and makes the antenna end reflect the carrier signal transmitted by the gateway to different degrees, and transmits the ID signal to the gateway.
传名码匹配模块：该模块用于匹配接收到的网关传来的充能信号中的传名码。该模块用于匹配接收到的网关传来的充能信号中的传名码，传名码一但匹配，则能量管理模块开启反向散射调制。Name code matching module: This module is used to match the name code in the charging signal received from the gateway. This module is used to match the name code in the charging signal received from the gateway. Once the name code matches, the energy management module starts backscatter modulation.
网关：为射频能量收集芯片提供充能和调制载波，发送一段时间(理论上使所有标签供电后)开始发送传名码进行轮询，并收集处理来自反向散射调制模块传来的数据，同时和外部网络进行交互；主要负责接收和处理反向散射调制模块传来的数据，以及和外部网络进行通信和数据交互，将数据传输到目标终端。如图3，传名码在充能方波中的形式如下，固定时延为一个传名单位，6个传名单位组成传名码，图3中a展示了101010的传名码波形，b展示了101110的传名码波形；Gateway: Provides charging and modulating carrier for RF energy collection chip, sends a period of time (theoretically, after all tags are powered), starts to send name transmission code for polling, collects and processes data from the backscatter modulation module, and interacts with the external network; is mainly responsible for receiving and processing data from the backscatter modulation module, as well as communicating and interacting with the external network, and transmitting data to the target terminal. As shown in Figure 3, the name transmission code is in the form of the charging square wave as follows: the fixed delay is one name transmission unit, and 6 name transmission units constitute the name transmission code. In Figure 3, a shows the name transmission code waveform of 101010, and b shows the name transmission code waveform of 101110;
一种传名码自动生成方法，流程如图2所示：A method for automatically generating a name code, the process is shown in Figure 2:
1.读取存储器中的表征芯片的唯一ID信息，信息长度为N；1. Read the unique ID information of the chip in the memory, the information length is N;
2.选择相应的编码方式；2. Select the corresponding encoding method;
3.选择对应编码方式的原始数据长度和低位码长度；3. Select the original data length and low-order code length of the corresponding encoding method;
4.根据编码方式生成唯一低位编码；4. Generate a unique low-order code according to the encoding method;
具体方法在于：The specific method is:
1.首先确定哈希函数。1. First determine the hash function.
2.将输入数据分割为适当大小的块，这些块可以是字节、字符或其他适当的单位。2. Split the input data into chunks of appropriate size, which can be bytes, characters, or other appropriate units.
3.将每个块按照哈希函数的规则转换为哈希值。哈希函数会将每个块转换为固定长度的哈希值。3. Convert each block into a hash value according to the rules of the hash function. The hash function converts each block into a hash value of fixed length.
4.将所有块的哈希值按顺序连接起来，形成最终的哈希值。4. Connect the hash values of all blocks in sequence to form the final hash value.
5.哈希碰撞处理，采用加盐(salt)的方式，在哈希函数中引入额外的随机值进行混淆。5. Hash collision processing, using salting to introduce additional random values into the hash function for confusion.
6.得到高位编码的低位的唯一编码。6. Get the unique code of the low bit of the high bit code.
综上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围。The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
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| CN202410140708.0ACN117892747A (en) | 2024-02-01 | 2024-02-01 | A collision-proof simplex communication system and method based on radio frequency energy harvesting tag chip |
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| CN202410140708.0ACN117892747A (en) | 2024-02-01 | 2024-02-01 | A collision-proof simplex communication system and method based on radio frequency energy harvesting tag chip |
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| CN202410140708.0APendingCN117892747A (en) | 2024-02-01 | 2024-02-01 | A collision-proof simplex communication system and method based on radio frequency energy harvesting tag chip |
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