METHODS AND DEVICES FOR COMMUNICATIONS IN DEVICE-TO-DEVICE NETWORKS

• Main Authors: ASCHEUER PETER, LIPUMA GIUSEPPE, ESCH THOMAS, HELLFAJER ROLAND, SPAETH MARTIN, SCHOLAND TOBIAS, HUERTGEN FRANK, LOPEZ SOTO ROMEO, DORTMUND SVEN, ELLENBECK JAN, BURNIC ADMIR, SCHLAMANN MARKUS
• Format: Patent
• Language: Chinese; English
• Published: 02.02.2021
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; WIRELESS COMMUNICATIONS NETWORKS

The following technical problems have been addressed for D2D communications: 1) compensation of temperature-based frequency drift of a local frequency in a wireless device based on cross-correlation with a reference frequency of a synchronization signal; 2) synchronization for fast frequency hopping D2D communications with a plurality of synchronization sequences transmitted over a plurality of frequencies; 3) avoidance of Cyclic Prefix transmission by using data repetition; 4) power saving at a mobile device by determining a maximum timing offset to control the RF receiver on-time; 5) threshold-based termination of the accumulation of synchronization signal cross-correlation results; 6) optimized transport format selection in D2D based on channel quality and noise estimation; 7) blind transport format detection at the receiver among multiple transport format candidates. 对于D2D通信解决了以下技术问题：1)基于与同步信号的参考频率的互相关，补偿无线设备中的本地频率的基于温度的频率漂移。2)对于快速跳频D2D通信，与在多个频率上发送的多个同步序列进行同步。3)通过使用数据重复，避免循环前缀传输。4)通过确定最大定时偏移以实时控制RF接收机打开时间