公开(公告)号：US20220095255A1

公开(公告)日：2022-03-24

申请号：US17599932

申请日：2020-02-21

Applicant: ABB Power Grids Switzerland AG

Inventor： Zhibo PANG ,  Michele LUVISOTTO ,  Xiaolin JIANG ,  Roger JANSSON ,  Carlo FISCHIONE

IPC: H04W56/00 ,  H04W72/12 ,  H04L27/26 ,  H04W72/04

Abstract: Method and system of wireless TDMA scheduling for industrial machine-to-machine communication, including propagation-delay-aware scheduling. A method of scheduling in a TDMA based communication system between a first node and a plurality of second nodes by means of a respective communication link. The method may comprise obtaining a propagation time for each communication link; and determining the largest difference in propagation times of two communication links. The method may further include selecting a first mode of scheduling if the largest difference is smaller than a threshold, and selecting a second mode of scheduling if the largest difference is larger than the threshold. The first mode includes selecting a guard time to be applied in each of the time slots, which guard time is based on the largest difference. The second mode is propagation-delay-aware and includes scheduling the transmission from each second node on the basis of the respective propagation time.

公开(公告)号：US20220150698A1

公开(公告)日：2022-05-12

申请号：US17438803

申请日：2020-03-11

Applicant: ABB Power Grids Switzerland AG

Inventor： Zhibo PANG ,  Michele LUVISOTTO ,  Fei PAN ,  Ming XIAO ,  Roger JANSSON

IPC: H04W12/065 ,  H04W12/03 ,  H04W12/122 ,  H04L5/00 ,  H04B7/06

Abstract: Communication method (100) using OFDM (Orthogonal Frequency Division Multiplexing) comprising transmitting and receiving packets between a first node and at least one second node, where each packet comprises a preamble and payload data. The method is performed by the first node and comprises: receiving (114) packets from the at least one second node, and authenticating (112) the at least one second node based on physical layer characteristics, i.e. on CSI (Channel State Information). Especially, the authenticating (112) is based on a plurality of preambles, which) are extracted from a group of consecutively received packets.

公开(公告)号：US20220110113A1

公开(公告)日：2022-04-07

申请号：US17429564

申请日：2020-02-13

Applicant: ABB Power Grids Switzerland AG

Inventor： Zhibo PANG ,  Michele LUVISOTTO ,  Roger JANSSON

IPC: H04W72/04 ,  H04W28/06

Abstract: A method of allocating resources to at least one wireless node in a wireless communication network, comprising: continuously receiving, at a wireless node, assignment of a number of slots, wherein the slots have a fixed slot time; obtaining (S1) information regarding physical layer parameters together with said assignment of said number of slots and said slot time; extracting (S2) a packet from a packet transmission queue maintained by said wireless node; computing (S3), based on the obtained information regarding physical layer parameters, a duration of said packet; comparing (S4A, S4B, S4C) said packet duration with said slot time;
performing in real time at least one of fragmentation (S5C), aggregation (S5A) and reconfiguration (S5B) of said physical layer parameters, depending on the results of said comparison step and/or an amount of packets in said packet transmission queue; and mapping (S6) said packet to a first one of the assigned slots.