Near Link1.0 is a short-range wireless communication technology, mainly for intelligent vehicles, intelligent terminals, smart home and intelligent manufacturing applications in four fields. Near Link 1.0 series standards build a core end-to-end architecture based on Near Link access layer, basic service layer and basic application layer, with low latency, high reliability, high synchronization accuracy, support for multiple concurrency, high information security and low power consumption and other outstanding technical features.

In order to meet the communication needs in different scenarios, Near Link technology provides SLB (SparkLink Basic, Stallflash basic access technology) and SLE (Sparklink Low Energy, Stallflash low power access technology) two wireless communication interfaces.

SLB: SparkLink Basic, star flash basic access technology

SLB can be understood as WiFi, with faster speed, lower latency, and larger data transmission.

SLE: Sparklink Low Energy, low power access technology

SLE can be understood as Bluetooth, which has lower power consumption.

SLB and SLE provide different transport services for different business needs and complement each other.

 SLB related introduction

SLB uses orthogonal multi-carrier (OFDM) waveform, supports very low delay wireless frame, air interface one-way data transmission delay is less than 20.833us (the lowest delay in the industry), single carrier support 20MHz bandwidth, the maximum support 16 carriers a total of 320MHz bandwidth. The highest rate supports channel coding at code rate 0.92, 1024QAM modulation and 8-stream parallel transmission, and the deepest coverage supports channel coding at code rate 1/8 and QPSK modulation. The SLB supports transparent data transmission at the data link layer, which greatly reduces the system overhead and increases the access capacity of multiple nodes. The SLB supports optimized access resource configuration and allows multiple users to access the system with low latency.

SLB currently operates at 5150MHz-5350MHz, 5725MHz-5850MHz. The minimum carrier bandwidth of the system is 20MHz, and the carrier bandwidth of 40/60/80/100/160/320MHz is supported upward, which is composed of multiple consecutive 20MHz carrier aggregation modes. The 20MHz carrier consists of 39 consecutive sub-carriers, separated by 480KHz, numbered as #0,#1,... ,#38, where the #19 subcarrier is a DC subcarrier and does not carry information. In a 20MHz operating bandwidth, the lowest frequency and the highest frequency reserve some resources without placing available subcarriers. Modulation up to 1024QAM is supported, and Reed-Solomon channel coding or Polar code is supported.

SLE related Introduction

For SLE, Near Link Alliance has launched NearLink technology brand. Through the relevant certification of Near Link Alliance, we can use the trademark authorization of NearLink, which can provide low-cost and low-power air interface access.

SLE uses single carrier transmission, bandwidth support 1MHz, 2MHz and 4MHz, modulation mode support GFSK, BPSK, QPSK and 8PSK. Polar channel coding improves transmission reliability, reduces retransmission to save power, and streamlines broadcast channel functions and services to reduce congestion. Compared with existing low-power wireless short-range technologies, SLE can stably support 128Kbps audio transmission under the same deep coverage conditions, support higher rates (peak 12Mbps), support lossless audio transmission, support reliable multicast transmission, support heterogeneous access, support hundreds of magnitude node access.

SLE currently operates at 2400MHz-2483.5MHz, 5150MHz-5350MHz, 5725MHz-5850MHz. The system adopts single carrier frequency hopping method for data transmission, and the channel bandwidth supports 1MHz, 2MHz and 4MHz. Uses low-power GFSK waveforms. At the same time, in order to meet the higher rate transmission to support higher-order services, QPSK modulation waveform and 8PSK modulation waveform are also supported.

Characteristics and advantages of Near Link technology

Near Link technology has significant advantages over traditional wireless connectivity technologies such as Bluetooth.

First, Near Link technology will achieve lower latency and lower power consumption through soft and hard collaboration, providing a more stable and efficient wireless connection.

Second, the broad coverage of Near Link technology will enable users to enjoy a stable and high-speed network connection in all types of scenarios, whether at home, in the office or in public places.

Third, Near Link technology also has higher security, to ensure the privacy and security of user data.

Near Link helps the high-quality development of the industry

First of all, for intelligent terminal equipment manufacturers, the application of Near Link technology will make products more competitive and meet users' needs for connection performance.

Secondly, Near Link technology will bring more innovative applications to smart home, smart office and other fields, and promote the upgrading and transformation of the industry.

In addition, the high security of Near Link technology will also help the sustainable development of the industry in the digital age.

Near Link only uses 60% of Bluetooth energy consumption, it can reach 6 times the speed, and the transmission delay is only 1/30.

It can increase the airport delay of the e-sports mouse from millisecond level to microsecond level, and with high bandwidth and anti-interference ability, the lossless audio that is difficult to achieve in the past Bluetooth headphones has become a reality.

In the smart travel scenario, the positioning accuracy of the star flash digital car key has changed from the meter level to the decimeter level

Near Link certification related content

For the certification of Near Link, it is also divided into conventional regulatory certification and alliance certification.

Because Near Link is currently using Unlicensed bands, the general regulatory certification requirements are the same as common Bluetooth /Wi-Fi certification tests.

For the certification of the Near Link Alliance, it has also been gradually opened up, and the relevant RF and protocol conformance test system has also passed the recognition of the Alliance, and can complete the relevant test certification in the authorized laboratory. For upper-layer applications, the alliance has also opened the application of UUID, I believe that more application scenarios will be continuously improved and realized in the hands of various manufacturers.

Near Link Alliance