公开(公告)号：US20190007254A1

公开(公告)日：2019-01-03

申请号：US16038163

申请日：2018-07-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Tao OUYANG ,  Syed Habib RAHMAN ,  Xiaoshu SI ,  Fan WANG ,  Hao LEI

IPC: H04L27/26

Abstract: A method and an apparatus for determining a time offset are disclosed. The method includes: obtaining, by a device at a head end, a time-domain signal based on a received signal; and then determining a time offset based on values of peak-to-average ratios of a preset quantity of symbols starting from a qth symbol in the time-domain signal, where a peak-to-average ratio of the qth symbol is greater than a preset threshold. A new method for determining a time offset is provided, and takes advantages that the time-domain signal obtained by the device at the head end has stronger capabilities of resisting interference such as frequency offset and phase noise. The method for determining a time offset can be applied both to initial ranging and periodic ranging.

公开(公告)号：US20160119346A1

公开(公告)日：2016-04-28

申请号：US14985883

申请日：2015-12-31

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Wenbin CHEN ,  Hao LEI ,  Qinqin YANG

IPC: H04L29/06

CPC classification number: H04L63/0876 ,  H04L9/008 ,  H04L9/32 ,  H04L9/3231 ,  H04L63/0442 ,  H04L63/0861 ,  H04L63/123 ,  H04L63/126

Abstract: Embodiments of the present disclosure provide a method, an apparatus, and a system for authenticating a fully homomorphic message, where the method includes: acquiring a message authentication key, where: the message authentication key includes a public key, a first character string, and a second character string; the first character string is a character string that consists of 0 and 1 and has a length of n; the second character string is a character string that consists of 0 and 1 and has a length of n; generating an authentication fingerprint corresponding to each bit of to-be-computed data; sending a computation request to a server; receiving an authentication fingerprint corresponding to the computation result; and performing correctness authentication on the computation result according to the received authentication fingerprint, which effectively reduces an amount of computation in a verification process.

Abstract translation: 本公开的实施例提供了一种用于认证完全同态消息的方法，装置和系统，其中所述方法包括：获取消息认证密钥，其中：所述消息认证密钥包括公钥，第一字符串和 第二个字符串; 第一个字符串是由0和1组成的长度为n的字符串; 第二个字符串是由0和1组成的长度为n的字符串; 生成与要计算的数据的每个比特相对应的认证指纹; 向服务器发送计算请求; 接收与计算结果相对应的认证指纹; 并根据接收到的认证指纹对计算结果执行正确性认证，这有效地减少了验证过程中的计算量。