Patents by Inventor Jan Christoffersson

Jan Christoffersson 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).

  • Publication number: 20230179385
    Abstract: According to some embodiments, a method performed by a wireless device comprises obtaining an indication of an initial resource region. The initial resource region comprising time frequency resources, wherein the time frequency resources are divided into a plurality of scheduling occasions (SOs) and each of the plurality of SOs is associated with an uplink beam. The method further comprises: determining the wireless device has moved out of coverage of a first beam and that uplink resources associated with the first beam should no longer be used; selecting a second beam for uplink transmission; selecting a SO associated with the second beam from the initial resource region; and transmitting an initial transmission of uplink data in the selected SO using the second beam.
    Type: Application
    Filed: May 14, 2021
    Publication date: June 8, 2023
    Inventors: Min Wang, Mårten Ericson, Jan Christoffersson
  • Publication number: 20230180276
    Abstract: Embodiments include methods, for a user equipment (UE), of uplink (UL) transmission of data to a plurality of transmission reception points (TRPs) in a wireless network. Such methods include receiving, from the wireless network, configurations for a plurality of configured grants of resources for UL transmission, UL CGs, wherein at least one of the UL CG configurations includes resources for transmission to a plurality of TRPs. Such methods include selecting one or more of the UL CG configurations for transmission of data available at the UE based on characteristics of the data and/or of radio channels between the UE and the respective TRPs. Such methods include transmitting the data to one or more of the plurality of TRPs on resources of the selected one or more UL CG configurations. Other embodiments include complementary methods for a network node, as well as UEs and network nodes configured to perform such methods.
    Type: Application
    Filed: June 16, 2021
    Publication date: June 8, 2023
    Inventors: Majid Gerami, Bikramjit Singh, Min Wang, Stefan Wänstedt, Jan Christoffersson
  • Patent number: 11665659
    Abstract: A method performed by a User Equipment (UE) for managing Time Alignment (TA) for Uplink (UL) transmissions between the UE and a network node in a wireless communications network. The network node serves a cell comprising at least a first UL carrier (111) and a second UL carrier (112). The UE is configured (502) with a first TA configuration for the first UL carrier (111) in the cell. The UE is further configured (503) with a second TA configuration for the second UL carrier in the cell. The UE then activates (504) at least one of the first and second TA configuration for the UE.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: May 30, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Min Wang, Jan Christoffersson, Jinhua Liu
  • Publication number: 20230156540
    Abstract: Methods and apparatuses involve a network node (22) of a wireless communication network (10) and a wireless device (12) attempting redirection with respect to the network (10). An overall bound limits how many times or for how long the wireless device (12) attempts redirection and provides a mechanism for the wireless device (12) to extend its redirection efforts to one or more redirection targets beyond those indicated by the network (10).
    Type: Application
    Filed: April 9, 2021
    Publication date: May 18, 2023
    Inventors: Min Wang, Muhammad Ali Kazmi, Marco Belleschi, Iana Siomina, Jan Christoffersson, Mai-Anh Phan
  • Publication number: 20230156817
    Abstract: The invention relates to a method in a user equipment, UE, for performing handover to a target cell in a wireless network, the method comprising performing (1340) a first random-access, RA, procedure in first RA resources of the target cell, in response to failure of the first RA procedure, refraining (1350) from declaring a radio link failure, RLF, for the target cell and performing a second RA procedure in second RA resources of the target cell that are different from the first RA resources; and declaring (1370) a RLF for the target cell based on failure of the first RA procedure and a failure of the second RA procedure, or an expiration of a timer before successful completion of the second RA procedure; the invention further relates to a UE implementing the method, to a corresponding method in a network node and a network node implementing the method.
    Type: Application
    Filed: April 7, 2021
    Publication date: May 18, 2023
    Inventors: Min Wang, Iana Siomina, Jan Christoffersson, Muhammad Ali Kazmi, Marco Belleschi
  • Publication number: 20230156818
    Abstract: A wireless device (40) determines that no resources configured for random access on a link support a minimum gap requirement of the wireless device (40), where the minimum gap requirement is a minimum gap required in time between an end of a transmission of a random access preamble (16) and a start of a transmission of a payload (18). Based on this determination, the wireless device either (i) transmits a random access preamble (16) using the resources configured for random access on the link, but waits to transmit a payload (18) until the wireless device (40) receives a random access response in response to the random access preamble (16); (ii) delays random access on the link until resources configured for random access on the link support the minimum gap requirement of the wireless device (40); or (iii) selects to perform random access on a different link.
    Type: Application
    Filed: April 7, 2021
    Publication date: May 18, 2023
    Inventors: Min Wang, Jan Christoffersson, Robert Mark Harrison, Zhipeng Lin, Johan Rune, Henrik Enbuske
  • Publication number: 20230147090
    Abstract: There is provided mechanisms for triggering mobility measurements. A method is performed by a network node. The method comprises obtaining information about backhaul link quality of a wireless backhaul link of the network node. The method comprises, as a result thereof, sending, to at least a subset of all UEs served by the network node in a cell, an indication for the subset of UEs to perform mobility measurements. The method comprises receiving mobility measurement reports from the subset of UEs. The method comprises determining a handover action for the subset of UEs based at least on the backhaul link quality and on the mobility measurement reports.
    Type: Application
    Filed: March 14, 2020
    Publication date: May 11, 2023
    Inventors: Jan Christoffersson, Min Wang, Mårten Ericson, Tommy Arngren
  • Publication number: 20230114449
    Abstract: Method and device(s) for supporting charging relating to a group transmission in a wireless communication network, said group transmission involving a group of wireless devices configured to, via one or more direct communication links between each other, participate in data transmission between a source wireless device and the wireless communication network. Data is transmitted on a device specific group bearer in a core network of the wireless communication network, which second data relates to the group transmission and to a wireless device of the group. Said device specific group bearer being configured specifically for data transmission usage relating to the wireless device when the data transmission is part of the group transmission.
    Type: Application
    Filed: April 20, 2020
    Publication date: April 13, 2023
    Inventors: Min WANG, Jan CHRISTOFFERSSON, Mårten ERICSON
  • Publication number: 20230103917
    Abstract: The present disclosure relates to telecommunications. In one of its aspects, the disclosure concerns a method in a coordinator User Equipment (UE) for registering a group of UEs to a wireless communications system. The coordinator UE represents the group of UEs. The method comprises transmitting, to a Radio Access Network (RAN)node, a message comprising a group IDentity (ID) to initiate an authentication and security procedure to register the group of UEs to the wireless communications system.The group ID identifies the group of UEs.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 6, 2023
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mårten ERICSON, Min WANG, Jan CHRISTOFFERSSON
  • Publication number: 20230102946
    Abstract: A wireless device chooses a selection method from among multiple selection methods (22-1, 22-2) for selecting an occasion in which to transmit a random access preamble (16). The selections methods may for example include a random selection method in which the wireless device randomly selects an occasion and include a last-in-time selection method in which the wireless device selects an occasion that occurs last in time. Regardless, the wireless device selects, according to the chosen selection method, an occasion in which to transmit a random access preamble (16). The wireless device then transmits a random access preamble in the selected occasion, e.g., after performing a listen-before-talk procedure.
    Type: Application
    Filed: February 12, 2021
    Publication date: March 30, 2023
    Inventors: Min Wang, Jan Christoffersson
  • Publication number: 20230089641
    Abstract: A wireless device (12) is configured for use in a wireless communication network (10). The wireless device (12) obtains a configuration (24) that governs how the wireless device (12) is to monitor for and/or attempt to recover from consistent uplink listen-before-talk, LBT, failure that occurs during a mobility procedure (18) triggered by the wireless device (12). According to the obtained configuration (24), the wireless device (12) monitors for and/or attempts to recover from consistent uplink LBT failure occurring during the mobility procedure (18).
    Type: Application
    Filed: April 8, 2021
    Publication date: March 23, 2023
    Inventors: Min Wang, Muhammad Ali Kazmi, Marco Belleschi, Iana Siomina, Jan Christoffersson
  • Patent number: 11611993
    Abstract: Embodiments herein relate to e.g. a method performed by a radio network node for handling communication of a wireless device in a wireless communication network. The radio network node receives, from the wireless device, a preamble of a random access procedure on a first carrier or a second carrier. The radio network node further transmits, to the wireless device, a random access response (RAR), wherein the RAR or transmission of the RAR indicates the carrier out of the first carrier and the second carrier the preamble was received on.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: March 21, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Jan Christoffersson, Min Wang
  • Publication number: 20230083993
    Abstract: A method by a wireless device includes transmitting, to a network node, a first message to initiate a 2-step Random Access (RA) procedure to access a network. After transmitting the first message, the wireless device receives, from the network node, a second message including at least one parameter indicating that the wireless device is to wait a period of time before reattempting to access the network using the 2-step RA procedure. Based on the parameter indicating that the wireless device is to wait a period of time before reattempting to access the network using the 2-step RA procedure, the wireless device attempts to access the network using a 4-step RA procedure without waiting for the period of time.
    Type: Application
    Filed: February 11, 2021
    Publication date: March 16, 2023
    Inventors: Johan Rune, Jan Christoffersson, Henrik Enbuske
  • Patent number: 11601984
    Abstract: Embodiments include methods performed by a wireless device for random access to a wireless communications network. Such methods include, using a physical random access channel (PRACH) configuration that is associated with a first index, transmitting a random preamble to the wireless communication network in an uplink (UL) bandwidth part (BWP) of a carrier. Such methods also include selecting a first downlink (DL) BWP of the carrier based on an association between the first index and the first DL BWP and monitoring the first DL BWP for a random access response from the wireless communication network. Other embodiments include complementary methods performed by a base station, as well as wireless devices and base stations configured to perform such methods.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: March 7, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Björn Hofström, Jan Christoffersson, Min Wang
  • Publication number: 20230061663
    Abstract: A method performed by a wireless device is described herein. The wireless device operates in a wireless communications network. The wireless device provides a message to be sent to a network node operating in the wireless communications network. The message is a first scheduled message to be sent to the network node in a random access procedure. The message comprises a first indicator of a type of the message. The type of message has: a) a fixed size SDU, and b) a one byte header comprising the first indicator and lacking a second indicator of a length of a payload. The wireless device also initiates sending the provided message to the network node. Also described is a method performed by the network node receiving and initiating processing the message, based on the first indicator.
    Type: Application
    Filed: October 27, 2022
    Publication date: March 2, 2023
    Inventors: Gunnar Bergquist, Jan Christoffersson, Mats Folke
  • Publication number: 20230068789
    Abstract: Techniques are provided to enable use of more than two preamble group Bs during random access (RA) for connected UEs. This flexibility is achieved by configuring the active BWP to overlap with the 2-step RA resources on the initial BWP, configuring different sizes of preamble group B in the initial BWP and the active BWP, a allowing connected UEs in the active BWP to use the MsgA PRACH and MsgA PUSCH resources in the initial BWP without switching active BWP.
    Type: Application
    Filed: February 12, 2021
    Publication date: March 2, 2023
    Inventors: Jan Christoffersson, Jonas Sedin, Johan Rune, Henrik Enbuske
  • Publication number: 20230050699
    Abstract: A method and a User Equipment, UE, for handling multiple Bandwidth Parts, BWPs, when being connected to a wireless network. The UE is configured to obtain from the network a configuration for use when autonomously switching from a source BWP to a target BWP, said configuration indicating one or more transmissions that the UE can start in the target BWP during a BWP switch. When detecting that the UE is subjected to a trigger event in the source BWP, wherein the trigger event triggers an autonomous BWP switch, the UE transmits to the network in the target BWP a BWP switch request, and the UE also performs at least one further transmission indicated by the obtained configuration.
    Type: Application
    Filed: December 1, 2020
    Publication date: February 16, 2023
    Inventors: Min Wang, Jan Christoffersson
  • Publication number: 20220408478
    Abstract: Operation in unlicensed spectrum requires Clear Channel Assessment (CCA), where a transmitter must monitor the channel before transmitting, to ensure it is free. An exception is a brief gap that allows for Rx/Tx turn-around, so that an ACK can be transmitted following reception, without performing a new CCA. NR introduces a 2-step Random Access (RA) procedure, where MsgA includes both a PRACH and a PUSCH transmission. To minimize CCA delays in unlicensed spectrum, only those RACH opportunities (ROs) and PUSCH opportunities (POs) that result in a very small delay between the PRACH and PUSCH transmissions of MsgA should be employed. RO configurations are defined for LTE 4-step RA. Embodiments provides methods for selecting which of these be may be shared for 2-step RA, for selecting which should be used in case of collisions, for selecting ROs and POs when the configurations are not shared, and for communicating RO configurations to UEs.
    Type: Application
    Filed: October 2, 2020
    Publication date: December 22, 2022
    Inventors: Jan Christoffersson, Min Wang, Stephen Grant, Robert Mark Harrison, Zhipeng Lin, Johan Rune, Johan Axnäs
  • Patent number: 11528767
    Abstract: Embodiments herein disclose, e.g., a method performed by a user equipment, UE, for handling communication in a wireless communication network, wherein the UE is in a connected mode in a first beam connected to a radio network node. The UE detects a beam failure of the first beam and transmits, to the radio network node, a preamble of a random access procedure in a second beam, wherein the preamble or a random access resource used for the preamble is associated with a beam failure recovery. The UE then receives a random access response, RAR, from the radio network node, wherein the RAR includes an uplink, UL, grant but without a temporary identity that is used by a medium access control, MAC, entity during a random access procedure.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: December 13, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Min Wang, Jan Christoffersson
  • Publication number: 20220394776
    Abstract: A method performed by a wireless device for determining an identity of the wireless device, MsgB RNTI, in a wireless communications network during a random access procedure is provided. The wireless device transmits a random access preamble on a RACH at a random access occasion. It also transmits a message on a PUSCH that corresponds to the random access preamble. Further, the wireless device determines an MsgB RNTI as the sum of a first identity, RA-RNTI, and an offset that is an integer greater than 1, wherein the RA-RNTI is based on a sum comprising terms corresponding to at least the index of a first OFDM symbol, the index of a frequency resource, and the index of a first time slot that identifies the time/frequency resources of the random access occasion.
    Type: Application
    Filed: November 5, 2020
    Publication date: December 8, 2022
    Inventors: Robert Mark HARRISON, Jan CHRISTOFFERSSON, Zhipeng LIN, Johan RUNE, Henrik ENBUSKE