公开(公告)号：US09838070B1

公开(公告)日：2017-12-05

申请号：US15527955

申请日：2014-12-22

Applicant: SHENYANG INSTITUTE OF AUTOMATION, CHINESE ACADEMY OF SCIENCES

Inventor： Wei Liang ,  Haibin Yu ,  Bo Yang ,  Xiaoling Zhang

IPC: H04B1/713 ,  H04W72/12 ,  H04W72/04 ,  H04B1/405 ,  H04B1/10

CPC classification number: H04B1/713 ,  H04B1/405 ,  H04B1/7143 ,  H04B2001/1045 ,  H04W16/02 ,  H04W72/0426 ,  H04W72/12

Abstract: The present invention relates to wireless network technology and presents a permutation group-based channel rendezvous method for a multi-antenna cognitive radio network, allowing a cognitive user equipped with multiple antennas to achieve blind channel rendezvous without the need for clock synchronisation. The present invention defines channel hopping sequences whilst making full use of properties such as channel diversity, the closure nature of permutation groups, and multi-antenna concurrency; based on the permutation groups obtained by rotating a regular polyhedron or a regular polygon around different angles according to different types of axes of symmetry, cyclical splicing is implemented, and different antennas can, according to different rules, independently generate hopping sequences and switching channels; the sequence generating methods are various and flexible; the use of parallel search ensures that deterministic rendezvous with other cognitive users is achieved as quickly as possible and as much as possible in a limited time; and the present method is a highly efficient blind channel rendezvous method having wide applicability and suitable for use in large-scale wireless networks.

公开(公告)号：US10694388B2

公开(公告)日：2020-06-23

申请号：US16073023

申请日：2017-05-18

Applicant: SHENYANG INSTITUTE OF AUTOMATION, CHINESE ACADEMY OF SCIENCES

Inventor： Wei Liang ,  Haibin Yu ,  Bo Yang ,  Meng Zheng ,  Shiwei Peng ,  Shiming Li

IPC: H04W16/10 ,  H04B1/713 ,  H04W16/14 ,  H04B1/7156

Abstract: The present invention relates to a Torus-Quorum based channel rendezvous method for directional antennas. A pair of directional antennas facing any side initially points to the other party mutually in one Torus-Quorum system cycle through a rotation closure attribute of a Torus-Quorum system; and a receiver and a sender switch to a same available channel according to frequency hopping sequences to realize channel rendezvous. In the Torus-Quorum based channel rendezvous method for directional antennas proposed in the present invention, the directional antennas are rotated based on the Torus-Quorum, and elements are ensured to coincide with each other within limited time through the rotation closure attribute of the Torus-Quorum system, i.e., directions are opposite, thereby effectively shortening channel rendezvous time of the directional antennas.