Patent ID: 11963216
Assignee: HITACHI ENERGY LTD
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for channel access in an industrial wireless network, the method comprising:
allocating, by a network controller and to packet transceivers in the industrial wireless network, time/frequency resource units in a set of guaranteed timeslots, wherein the guaranteed timeslots are timewise divided into slots and frequency wise divided into channels, where one slot-channel pair defines one time/frequency resource unit, at least two allocated time frequency/resource units sharing a slot, wherein information of the allocated time/frequency resource units for each packet transceiver is provided in a resource allocation scheme, wherein a frequency hopping pattern for the allocated time/frequency resource units in the resource allocation scheme is applied between consecutive guaranteed timeslots, the consecutive guaranteed timeslots not being separated by a shared timeslot, wherein each allocated time/frequency resource unit is allocated to a single packet transceiver;
providing, by the network controller and to the packet transceivers, information about the time/frequency resource units allocated to the packet transceivers;
mapping, by the packet transceivers, packets of their own traffic flows to their allocated time/frequency resource units in each set of guaranteed timeslots, wherein the packets for each packet transceiver are mapped according to priority based scheduling of its own traffic flows and independently of any mapping of packets of other packet transceivers in the industrial wireless network;
after mapping, by the packet transceivers, packets of their own traffic flows to their allocated time/frequency resource units in each set of guaranteed timeslots, providing feedback, from the packet transceivers and to the network controller about usage of the allocated time/frequency resource units; and
dynamically updating, by the network controller, the resource allocation scheme according to the feedback as obtained by the network controller from the packet transceivers.