Patents by Inventor Per Elmdahl

Per Elmdahl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11979814
    Abstract: A method of enabling a publisher mesh node to update a number of hops that is to be used for communication between said publisher mesh node and a subscriber mesh node in a wireless mesh network, wherein said method comprises the steps of periodically receiving, by said subscriber mesh node, broadcasted messages from said publisher mesh node, wherein said broadcasted messages comprise a number of hops that said broadcasted messages may traverse in said mesh network, determining, by said subscriber mesh node, that one or more periodically broadcasted messages have not been received, transmitting, by said subscriber mesh node in reply to said determination that one or more periodically broadcasted messages have not been received, a probe message to said publisher mesh node, wherein said probe message comprises a number of hops corresponding to a periodically broadcasted message that was received by said subscriber mesh node.
    Type: Grant
    Filed: April 28, 2022
    Date of Patent: May 7, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Jingcheng Zhang, Per Elmdahl, Wei Shen
  • Publication number: 20240089816
    Abstract: A radio base station in a mobile communication network sends a handover request message to multiple target base stations to initiate handover of a wireless device. The radio base station maintains one or more handovers counters used for monitoring and evaluating performance. The base station receives one or more handover response messages from respective target base stations. In response to receiving the one or more handover response messages, the base station increments a handover counter associated with the wireless device once regardless of a number of the handover response messages received.
    Type: Application
    Filed: January 7, 2022
    Publication date: March 14, 2024
    Inventors: Per Elmdahl, Fredrik Gunnarsson, Roman Zhohov
  • Patent number: 11750411
    Abstract: Embodiments include methods for a gateway device to selectively forward messages in a wireless mesh network. Such methods include receiving, over one of a plurality of network interfaces of the gateway device, a message published to a group address or a virtual address and retrieving, from a database accessible by the gateway device, unicast addresses of all communication devices identified by the group address or the virtual address. Such methods include, based on determining that all communication devices addressed by the retrieved unicast addresses are serviced by the gateway device, sending the received message on all network interfaces that correspond to the communication devices addressed by the retrieved unicast addresses; and based on determining that not all communication devices addressed by the retrieved unicast addresses are serviced by the gateway device, sending the received message on all network interfaces except for the network interface over which the message was received.
    Type: Grant
    Filed: December 12, 2022
    Date of Patent: September 5, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per Skillermark, Per Elmdahl, Thomas Rimhagen
  • Publication number: 20230188952
    Abstract: A method of a transmitter node is disclosed, for conveying a message selected from a collection of messages to a receiver node. The method comprises mapping the message to a current codeword based on a previous codeword and/or based on a counter value, and transmitting the current codeword to convey the message to the receiver node. A method of a receiver node is also disclosed, for detecting a message selected from a collection of messages by a transmitter node. The method comprises mapping a candidate message from the collection of messages to a candidate codeword based on a previous codeword and/or based on a counter value, receiving a current codeword from the transmitter node, and detecting the candidate message when the current codeword coincides with the candidate codeword. Corresponding apparatuses, wireless communication device, nodes and computer program product and related methods are also disclosed.
    Type: Application
    Filed: May 18, 2020
    Publication date: June 15, 2023
    Inventors: Per Elmdahl, Per Skillermark
  • Patent number: 11664858
    Abstract: An antenna system (150) comprises a Centralized Processing Unit (160); at least two antenna units (200) connected to the CPU (160) by cables. Each antenna unit (200) comprises at least one connector; one or more antenna elements (220) and one or more 5 Antenna Processing Units (230) connected to the one or more antenna elements (200). The one or more antenna processing units (230) are connected to a data bus connected to the at least one connector.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: May 30, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Pål Frenger, Jan Hederen, Per Elmdahl, Linnea Faxen
  • Publication number: 20230106171
    Abstract: Embodiments include methods for a gateway device to selectively forward messages in a wireless mesh network. Such methods include receiving, over one of a plurality of network interfaces of the gateway device, a message published to a group address or a virtual address and retrieving, from a database accessible by the gateway device, unicast addresses of all communication devices identified by the group address or the virtual address. Such methods include, based on determining that all communication devices addressed by the retrieved unicast addresses are serviced by the gateway device, sending the received message on all network interfaces that correspond to the communication devices addressed by the retrieved unicast addresses; and based on determining that not all communication devices addressed by the retrieved unicast addresses are serviced by the gateway device, sending the received message on all network interfaces except for the network interface over which the message was received.
    Type: Application
    Filed: December 12, 2022
    Publication date: April 6, 2023
    Inventors: Per Skillermark, Per Elmdahl, Thomas Rimhagen
  • Patent number: 11576022
    Abstract: Embodiments herein relate to e.g. a method performed by a network node (10) for handling communication of data in a Bluetooth Low Energy (BLE) mesh network (1). The network node obtains a neighbor table, wherein the neighbor table is based on messages received from different network nodes; and selects an association between network nodes in the BLE mesh network (1) taking the neighbor table into account.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: February 7, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jingcheng Zhang, Piergiuseppe Di Marco, Per Elmdahl, Thomas Rimhagen, Wei Shen, Per Skillermark
  • Patent number: 11552815
    Abstract: A gateway device and a configuration client for supporting selective forwarding of messages published to a group address or a virtual address in a wireless mesh network of communicatively coupled communication devices, such as a Bluetooth Mesh system. The configuration client maintains a mapping between unicast addresses of communication devices and group and virtual addresses in the network. The gateway device receives, from the configuration client, unicast addresses of those communication devices collectively identified by the group or virtual address in a received message. When the retrieved unicast addresses are all serviced by the gateway device, the message is transmitted by the gateway device on all interfaces corresponding to the communication devices addressed by the retrieved unicast addresses. When the retrieved unicast addresses are not all serviced by the gateway device, the message is transmitted by the gateway device on all except one of the interfaces.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: January 10, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per Skillermark, Per Elmdahl, Thomas Rimhagen
  • Publication number: 20220264424
    Abstract: A method of enabling a publisher mesh node to update a number of hops that is to be used for communication between said publisher mesh node and a subscriber mesh node in a wireless mesh network, wherein said method comprises the steps of periodically receiving, by said subscriber mesh node, broadcasted messages from said publisher mesh node, wherein said broadcasted messages comprise a number of hops that said broadcasted messages may traverse in said mesh network, determining, by said subscriber mesh node, that one or more periodically broadcasted messages have not been received, transmitting, by said subscriber mesh node in reply to said determination that one or more periodically broadcasted messages have not been received, a probe message to said publisher mesh node, wherein said probe message comprises a number of hops corresponding to a periodically broadcasted message that was received by said subscriber mesh node.
    Type: Application
    Filed: April 28, 2022
    Publication date: August 18, 2022
    Inventors: Jingcheng Zhang, Per Elmdahl, Wei Shen
  • Patent number: 11350340
    Abstract: A method of enabling a publisher mesh node to update a number of hops that is to be used for communication between said publisher mesh node and a subscriber mesh node in a wireless mesh network, wherein said method comprises the steps of periodically receiving, by said subscriber mesh node, broadcasted messages from said publisher mesh node, wherein said broadcasted messages comprise a number of hops that said broadcasted messages may traverse in said mesh network, determining, by said subscriber mesh node, that one or more periodically broadcasted messages have not been received, transmitting, by said subscriber mesh node in reply to said determination that one or more periodically broadcasted messages have not been received, a probe message to said publisher mesh node, wherein said probe message comprises a number of hops corresponding to a periodically broadcasted message that was received by said subscriber mesh node.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: May 31, 2022
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Jingcheng Zhang, Per Elmdahl, Wei Shen
  • Publication number: 20220060224
    Abstract: An antenna system (150) comprises a Centralized Processing Unit (160); at least two antenna units (200) connected to the CPU (160) by cables. Each antenna unit (200) comprises at least one connector; one or more antenna elements (220) and one or more 5Antenna Processing Units (230) connected to the one or more antenna elements (200). The one or more antenna processing units (230) are connected to a data bus connected to the at least one connector.
    Type: Application
    Filed: October 15, 2019
    Publication date: February 24, 2022
    Inventors: Pål Frenger, Jan Hederen, Per Elmdahl, Linnea Faxen
  • Publication number: 20210218588
    Abstract: A gateway device and a configuration client for supporting selective forwarding of messages published to a group address or a virtual address in a wireless mesh network of communicatively coupled communication devices, such as a Bluetooth Mesh system. The configuration client maintains a mapping between unicast addresses of communication devices and group and virtual addresses in the network. The gateway device receives, from the configuration client, unicast addresses of those communication devices collectively identified by the group or virtual address in a received message. When the retrieved unicast addresses are all serviced by the gateway device, the message is transmitted by the gateway device on all interfaces corresponding to the communication devices addressed by the retrieved unicast addresses. When the retrieved unicast addresses are not all serviced by the gateway device, the message is transmitted by the gateway device on all except one of the interfaces.
    Type: Application
    Filed: March 31, 2021
    Publication date: July 15, 2021
    Inventors: Per Skillermark, Per Elmdahl, Thomas Rimhagen
  • Patent number: 11044771
    Abstract: A method of sharing an established connection between a primary device in a network and one of a plurality of secondary devices. The method comprising the steps of receiving from an unconnected secondary device said plurality of secondary devices, an advertising packet for identifying said unconnected secondary device, sending, to said unconnected secondary device, a connection request based on said received advertising packet for establishing a connection between said unconnected secondary device and said primary device, said connection being shared among said unconnected secondary device and said one of said plurality of secondary devices, and transmitting, to secondary devices sharing an established connection, connection parameters, wherein said connection parameters define a time shared multiplexing scheme thereby facilitating sharing of said established connection. A complementary method and device for performing a method according to the present disclosure are also presented herein.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: June 22, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Roman Chirikov, Per Elmdahl
  • Patent number: 11012250
    Abstract: A gateway device and a configuration client for supporting selective forwarding of messages published to a group address or a virtual address in a wireless mesh network of communicatively coupled communication devices, such as a Bluetooth Mesh system. The configuration client maintains a mapping between unicast addresses of communication devices and group and virtual addresses in the network. At receipt of a message including a group or virtual address, the gateway device retrieves, from the configuration client, the unicast addresses of those communication devices collectively identified by the group or virtual address in the received message. If the retrieved unicast addresses are all serviced by the gateway device, the message is transmitted by the gateway device on all interfaces corresponding to the communication devices addressed by the retrieved unicast addresses.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: May 18, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per Skillermark, Per Elmdahl, Thomas Rimhagen
  • Patent number: 10944682
    Abstract: Method of establishing a route between a Route Originator, RO, mesh node and a Route Destination, RD, mesh node in a mesh network, said mesh network comprising a plurality of mesh nodes, said method comprising the steps of assembling a Route Request, RREQ, message, broadcasting said assembled RREQ message in said mesh network, receiving, by said RD mesh node, via any of said plurality of mesh nodes, said RREQ message, and transmitting, by said RD mesh node, a Route Reply, RREP, message towards said RO mesh node, and receiving, by said RO mesh node, via any of said plurality of mesh nodes, said RREP message thereby establishing said route between said RO mesh node and said RD mesh node, wherein an Route Sequence Number is used, which is a number specific for a pair of RO mesh node and RD mesh node.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: March 9, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Per Elmdahl, Piergiuseppe di Marco, Jingcheng Zhang
  • Patent number: 10855643
    Abstract: The present disclosure relates to methods and arrangements in a private address resolving node of a personal area network deploying Bluetooth low energy, BLE and in particular to methods and arrangements for proactively resolving periodically updated private addresses. When performed in a private address resolving node of a personal area network deploying Bluetooth low energy, BLE, a method comprises resolving a periodically updated private address of a private address generating node connected to the private address resolving node. The private address is used in addressing messages from the private address resolving node to the private address generating nodes.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: December 1, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Jingcheng Zhang, Per Elmdahl, Thomas Rimhagen, Wei Shen
  • Publication number: 20200344667
    Abstract: A method of enabling a publisher mesh node to update a number of hops that is to be used for communication between said publisher mesh node and a subscriber mesh node in a wireless mesh network, wherein said method comprises the steps of periodically receiving, by said subscriber mesh node, broadcasted messages from said publisher mesh node, wherein said broadcasted messages comprise a number of hops that said broadcasted messages may traverse in said mesh network, determining, by said subscriber mesh node, that one or more periodically broadcasted messages have not been received, transmitting, by said subscriber mesh node in reply to said determination that one or more periodically broadcasted messages have not been received, a probe message to said publisher mesh node, wherein said probe message comprises a number of hops corresponding to a periodically broadcasted message that was received by said subscriber mesh node.
    Type: Application
    Filed: February 7, 2018
    Publication date: October 29, 2020
    Inventors: Jingcheng Zhang, Per Elmdahl, Wei Shen
  • Publication number: 20200337100
    Abstract: A method of sharing an established connection between a primary device in a network and one of a plurality of secondary devices. The method comprising the steps of receiving from an unconnected secondary device said plurality of secondary devices, an advertising packet for identifying said unconnected secondary device, sending, to said unconnected secondary device, a connection request based on said received advertising packet for establishing a connection between said unconnected secondary device and said primary device, said connection being shared among said unconnected secondary device and said one of said plurality of secondary devices, and transmitting, to secondary devices sharing an established connection, connection parameters, wherein said connection parameters define a time shared multiplexing scheme thereby facilitating sharing of said established connection. A complementary method and device for performing a method according to the present disclosure are also presented herein.
    Type: Application
    Filed: January 19, 2018
    Publication date: October 22, 2020
    Inventors: Roman Chirikov, Per Elmdahl
  • Patent number: 10785700
    Abstract: A method in a node of a mesh network comprises receiving a plurality of neighbor count values, each neighbor count value relating to the number of neighbors associated with a particular neighbor of the node, and controlling the transmission of a beacon message based on the received neighbor count values. The method in a node of a mesh network may comprise determining a neighbor count value, the neighbor count value comprising the number of neighbor nodes associated with the node, and distributing the neighbor count value to the neighbor nodes of the node.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: September 22, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per Skillermark, Per Elmdahl, Wei Shen
  • Patent number: 10779149
    Abstract: An advertising wireless device (110) broadcasts (202; 802) an advertising message over a wireless communication link (115). The advertising wireless device receives (203a; 803), from an advertisement responding device (120-1), a request message that was sent by the advertisement responding device (120-1) at a certain point in time in response to the broadcasted advertising message. Said certain point in time being randomized within a listening time period during which the advertising wireless device (110) listens for a response to the broadcasted advertising message and is able to receive the request message.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: September 15, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jingcheng Zhang, Per Elmdahl, Thomas Rimhagen, Wei Shen