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公开(公告)号：US11184926B2
公开(公告)日：2021-11-23
申请号：US16324654
申请日：2017-08-11
发明人： Sorour Falahati , Havish Koorapaty
摘要： According to some embodiments, a method for use in a user equipment (UE) of managing a listen-before-talk (LBT) contention window size comprises performing a first LBT procedure using a first contention window size and priority class for a first uplink transmission in unlicensed spectrum. The first uplink transmission comprises an acknowledged transmission. The method further comprises transmitting a second uplink transmission. The second uplink transmission comprises an un-acknowledged transmission. The method further comprises receiving an acknowledgement for the first uplink transmission, and modifying both the first contention window size and a second contention window based on the received acknowledgement. The method further comprises performing a second LBT procedure using the second contention window size and a second priority class for a third uplink transmission in unlicensed spectrum. The third uplink transmission comprises an un-acknowledged transmission.
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62.发明申请公开(公告)号：US20210315008A1
公开(公告)日：2021-10-07
申请号：US17347723
申请日：2021-06-15
发明人： Reem Karaki , Yu Yang , Havish Koorapaty , Jung-Fu Cheng , Sorour Falahati
摘要： Systems and methods are disclosed herein that relate to multiple candidate starting points for a transmit burst in unlicensed spectrum. In some embodiments, a method of operation of a radio access node for performing a transmit burst in an unlicensed spectrum comprises transmitting a transmit burst in an unlicensed spectrum, wherein the transmit burst spans multiple subframes/slots and the transmitting of the transmit burst starts at one of a plurality of candidate starting points defined in at least a first subframe/slot of the transmit burst that occurs after successful completion of a Listen-Before-Talk (LBT) procedure for the transmit burst. In this manner, a radio access node (e.g., an enhanced or evolved Node B (eNB) in Long Term Evolution (LTE)) has flexibility to transmit a downlink transmit burst starting at different starting positions based on LBT outcome.
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公开(公告)号：US11064515B2
公开(公告)日：2021-07-13
申请号：US16382187
申请日：2019-04-11
摘要： Systems and methods for determining an uplink control channel resource to use for transmitting uplink control information to a network node are disclosed. In some embodiments, a method performed by a wireless device comprises receiving a first downlink control channel message that schedules a first downlink shared channel transmission, receiving a second downlink control channel message that schedules a second downlink shared channel transmission, and determining an uplink control channel resource to use for transmitting uplink control information to a network node. The uplink control information comprises Hybrid Automatic Repeat Request (HARQ) feedback for both the first downlink transmission and the second downlink transmission, and determining the uplink control channel resources for transmitting the uplink control information comprises determining the uplink control channel resources based on: (a) signaling received from the network node and (b) resource determination performed by the wireless device based on a latest received one of the first downlink control channel message and the second downlink control channel message. The method further comprises transmitting the uplink control information using the determined uplink control channel resource.
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公开(公告)号：US20210153150A1
公开(公告)日：2021-05-20
申请号：US17159278
申请日：2021-01-27
摘要： The scheduling flexibility of CSI reference signals enables time and frequency synchronization using multiple non-zero CSI-RSs transmitted in the same subframe, or using CSI-RSs transmitted in the same subframe with other synchronization signals. Also, multiple synchronization signals may be scheduled in the same subframe to enable fine time and frequency synchronization without cell-specific reference signals.
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公开(公告)号：US10708851B2
公开(公告)日：2020-07-07
申请号：US15579460
申请日：2017-10-23
摘要： A method in a wireless device comprises obtaining information related to a signal transmission configuration for autonomous uplink transmission by the wireless device, the information comprising: a set of pre-allocated resources for use by the wireless device in performing autonomous uplink transmission on at least one secondary cell established between the wireless device and a network node; and a periodicity associated with the set of pre-allocated resources. The method comprises performing autonomous uplink transmission according to the obtained information related to the signal transmission configuration.
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公开(公告)号：US10666488B2
公开(公告)日：2020-05-26
申请号：US15531752
申请日：2017-03-28
摘要： Embodiments herein relate to a method performed by network node (110) in a wireless communications network (100). The network node (110) transmits a number of bits indicating an uplink duration and an offset for a burst of uplink subframes to a wireless device (121) in a downlink subframe on a downlink control channel. Embodiments herein also relate to a method performed by a wireless device (121) in a wireless communications network (100). The wireless device (121) receives a number of bits indicating an uplink duration and an offset for a burst of uplink subframes to a wireless device (121) in a downlink subframe on a downlink control channel. Embodiments of the network node (110) and the wireless device (121) are also described.
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公开(公告)号：US20200163114A1
公开(公告)日：2020-05-21
申请号：US16750555
申请日：2020-01-23
发明人： Daniel Chen Larsson , Jung-Fu Cheng , Sorour Falahati , Havish Koorapaty , Amitav Mukherjee , Yu Yang
摘要： In one aspect, a wireless device receives a scheduling grant and a grant confirmation signal indicating that a network node has performed a CCA on a carrier and is releasing the carrier for the wireless device. An uplink message is transmitted on the carrier without performing a CCA on the carrier. In another aspect, a wireless device is connected to a first cell and a second cell configured on a carrier requiring an LBT protocol. The wireless device receives configuration messages indicating that downlink transmissions on the second cell are to be scheduled. This can mean self-scheduling for downlink on the second cell and cross-carrier scheduling for uplink on the first cell. The wireless device receives a scheduling grant in the first cell and performs a CCA in the second cell. The wireless device then transmits an uplink message responsive to success of the CCA.
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公开(公告)号：US10609720B2
公开(公告)日：2020-03-31
申请号：US16156037
申请日：2018-10-10
发明人： Angelo Centonza , Havish Koorapaty
摘要： Embodiments include methods, in a base station operating in a wireless communications network, for over-the-air synchronization with a cell served by a further base station. Embodiments include sending, to a core network (CN) node, a first eNB Configuration Transfer message comprising: an identity of a target base station, and a first SON Information Request IE comprising a value indicating a request for time synchronization information. Embodiments include receiving, from the CN node, a first MME Configuration Transfer message comprising a SON Information Reply IE that originated from the target base station and includes a muting availability flag. If the flag indicates that muting can be activated in the target base station, embodiments include sending, to the CN node, a second eNB Configuration Transfer message comprising the identity of the target base station and a second SON Information Request IE comprising a value for activating muting in the target base station.
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69.发明授权公开(公告)号：US10439672B2
公开(公告)日：2019-10-08
申请号：US15693054
申请日：2017-08-31
发明人： Yi-Pin Eric Wang , Cagatay Capar , Jung-Fu Cheng , Havish Koorapaty , Xingqin Lin , Amitav Mukherjee
摘要： Systems and methods for signaling or receiving cell identity, network identity, and/or Frequency Hopping (FH) patterns are disclosed. In some embodiments, a method of operating a wireless device in a wireless communication network includes obtaining a signal transmitted from a network node and determining a physical cell identifier, ID, of the network node based on the signal. The method also includes determining a FH pattern of the network node based on the determined physical cell ID of the network node. In this manner, the wireless device can efficiently determine the FH pattern used and may be able to determine if the wireless device should connect to the network node.
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公开(公告)号：US20190260628A1
公开(公告)日：2019-08-22
申请号：US16348856
申请日：2017-11-10
摘要： Provided are methods (400) of estimating a time delay and/or a frequency shift of a reference signal. Such methods include receiving (405) a first reference signal that is generated using a first Zadoff-Chu (ZC) sequence, receiving (410) a second reference signal that is generated using a second ZC sequence that is different than the first ZC sequence, and processing (415) the first reference signal and the second reference signal to estimate at least one of the time delay and the frequency shift of the first reference signal and/or the second reference signal.
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