Kabushiki Kaisha Toshiba

Aleksandar Stanoev

Adnan Aijaz

Usman Raza

Michael Baddeley

Jagdeep Singh

Victor Marot

A narrowband localization method including: concurrently transmitting, by a plurality of transmitters, a plurality of narrowband signals, wherein frequencies of respective narrowband signals are different from each other; receiving, by a receiver, a superimposed signal of the plurality of narrowband signals; and determining, by the receiver, a location of the receiver relative to the plurality of transmitters based on the superimposed signal received by the receiver.

Method and system for wireless localisation

A method for scheduling transmissions between a controller node, one or more, and one or more uplink nodes comprising: defining one or more non-overlapping downlink and uplink timeslots within a maximum cycle time period; scheduling each of the downlink nodes to listen to receive a respective downlink transmission from a one or multiple radios of the controller node in one of the downlink timeslots on one of a plurality of channels such that none of the downlink transmissions conflict with each other; and scheduling each of the uplink nodes to transmit a respective uplink transmission to a controller radio in one of the uplink timeslots on one of the channels such that none of the uplink transmissions conflict with each other. Each of the downlink nodes is scheduled to listen on a same channel as another if it is possible to do so without any of the respective downlink transmissions conflicting; and each of the uplink nodes is scheduled to transmit on a same channel as another if it is possible to do so without any of the respective uplink transmissions conflicting.

Scheduling system and method for scheduling transmissions from a controller node to a downlink node and from an uplink node to the controller node

A method of synchronizing clocks of a secondary node and primary node, the method comprising: the primary node transmitting a first message and an indication of that message's transmission time to the secondary node; the secondary node transmitting a second message to the primary node; the primary node transmitting a third message and an indication of that message's transmission time to the secondary node; the secondary node calculating a rate of its clock relative to the clock of the primary node using a ratio of times between the transmission and reception times of the first and third messages; and the secondary node calculating a time offset of its clock relative to the clock of the primary node using the calculated rate, a propagation delay and one of the indications of the transmission times of the first or third message.

Synchronising network nodes

A method of transmitting a data payload from one or more network nodes. The method includes transmitting a first data packet from a network node of the one or more network nodes and subsequently transmitting a second data packet from the network node of the one or more network nodes. The first data packet includes a set of blocks arranged in a first order and the second data packet including the set of blocks arranged in a second order that is different from the first order. Each block of the set of blocks includes a different section of the data payload and the sections of the data payload included by blocks of the set of blocks together define the entire data payload.

Methods and systems for transmitting data payloads

A method of generating a communication schedule for a plurality of nodes in a multi-hop network, the plurality of nodes comprising a first node, a second node and a third node, wherein: the second node is a primary parent of the first node and the third node is a secondary parent of the first node. The method comprises requesting, by the first node, a first resource in the communication schedule for communication from the first node to the second node and a second resource in the communication schedule for communication from the first node to the third node. The method further comprises allocating, by at least one of the second or third node, a second set of resources in the communication schedule comprising a third resource in the communication schedule for communication from the first node to the second node and a fourth resource in the communication schedule for communication from the first node to the third node; wherein: at least the third resource does not generate a conflict in the communication schedule.

Growing community of inventors

Bristol, United Kingdom

Aleksandar Stanoev