Sun Zhongjie （Nanjing Silan Microelectronics Technology Co., Ltd.，Jiangsu Nanjing 210042） Abstract：In recent years，how to reasonably use multiple rates for communication in BLE has received wide attention， but most studies focus on performance optimization at a single communication rate， which has a certain impact on the throughput of BLE device systems。To address these issues， a RSSI … Read more
【Research Background】 Lithium metal batteries are one of the development directions for high specific energy batteries, attracting significant attention in both academia and industry. However, it is commonly believed that lithium metal electrolytes with excellent performance should use single-phase electrolytes, which often conflicts with the different properties of the anode and cathode. Therefore, the rational … Read more
What are the different air packet formats in BLE? What are the common PDU commands? What is the difference between PDU and MTU? What is DLE? How does BLE implement retransmission? What is the principle of the BLE ACK mechanism? I hope this article can help answer these questions. Although the BLE air packet (also … Read more
Why Our Wearable Device Does Not Use Bluetooth (BLE) Protocol Introduction After 2010, with the promotion of low-energy Bluetooth protocol, the power consumption problem of traditional Bluetooth protocol has been greatly solved. Along with the development of smartphones, there has been a significant wave of smart hardware, including various wearable devices centered around smartphones, such … Read more
Why can the same smartphone connect successfully with some devices but fail with others? Why can the same device connect with some smartphones but not with others? Why does the same smartphone connect quickly with the same device at times and slowly at others? What is a Master? What is a Slave? What are Connection … Read more
Abstract:The random access process, as an important procedure for achieving UE initial access and uplink synchronization, has been simplified and modified in NB-IoT based on the LTE system. By comparing with the random access process in the LTE system, an in-depth analysis of the currently supported contention-based random access process in NB-IoT is conducted, and … Read more
Abstract: The adoption of the Discontinuous Reception (DRX) mechanism is an important means for mobile terminals to reduce power consumption. In the NB-IoT system, the low speed and low frequency of services require terminals to have extremely low power consumption. Therefore, it has made corresponding modifications to the discontinuous reception mechanism and introduced the Enhanced … Read more
Click the above “i Smart Fire Safety” to follow us! Nowadays, smoke detectors can be seen almost everywhere, whether in shopping malls, hospitals, offices, or museums. Especially in crowded places, installing smoke detectors is essential. With the continuous development of new technologies such as artificial intelligence, 5G, big data, and cloud computing, the application of … Read more
Siqing Liu, Yinggang Xie, Bolun Xin, Qiwen Deng (School of Information and Communication Engineering, Beijing Information Science and Technology University, Beijing 100101) Abstract: In response to the current issues of low efficiency, large errors, and limited range of traditional mechanical water meters, a home water intelligent monitoring system based on NB-IoT smart water meters is … Read more
The development of NB-IoT standardization in the past year of 2016 has created an urgent demand for commercial deployment. Many mainstream telecom operators, such as Deutsche Telekom and Vodafone UK, are carrying out large-scale deployments and promotions. Currently, there are three deployment options: 1. Deploying in the same frequency band as LTE 2. Deploying at … Read more