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公开(公告)号：US20230007697A1
公开(公告)日：2023-01-05
申请号：US17939882
申请日：2022-09-07
发明人： Abdelkader Medles , Gilles Charbit
摘要： Various solutions for random access channel (RACH) preamble design in non-terrestrial network (NTN) communications with respect to user equipment and network apparatus are described. An apparatus may initiate a RACH procedure. The apparatus may determine a fractional frequency offset pattern or a cover code across groups of preamble sequences. The apparatus may generate a RACH preamble signal according to at least one of the fractional frequency offset pattern and the cover code. The apparatus may transmit the RACH preamble signal to a network node.
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公开(公告)号：US11147117B2
公开(公告)日：2021-10-12
申请号：US16586255
申请日：2019-09-27
摘要： Various examples and schemes pertaining to timing advance validation for transmission in preconfigured uplink resources in narrowband Internet of Things (NB-IoT) are described. When in a first mode, an apparatus (e.g., a user equipment) receives a plurality of different values for a time alignment timer (TAT) from a network before entering a second mode from the first mode. When in the second mode, the apparatus selects one of the plurality of values to apply to the TAT and also starts the TAT to count. When there is data for uplink transmission while the apparatus is still in the second mode, the apparatus performs an early data transmission in an event that a timing advance (TA) value is valid and that the apparatus is in the same serving cell as it was before entering the second mode.
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公开(公告)号：US20210250885A1
公开(公告)日：2021-08-12
申请号：US17145392
申请日：2021-01-10
摘要： Various solutions for timing and frequency synchronization in non-terrestrial network (NTN) communications with respect to user equipment and network nodes are described. An apparatus may receive a reference time signaled by a network node. The apparatus may measure a received time of a downlink message from the network node. The apparatus may estimate a propagation delay according to the reference time and the received time. The apparatus may perform a timing pre-compensation according to the propagation delay.
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公开(公告)号：US20230086240A1
公开(公告)日：2023-03-23
申请号：US17865147
申请日：2022-07-14
发明人： Abdelkader Medles , Mehmet Kunt , Pradeep Jose , Gilles Charbit , Abhishek Roy
摘要： Various solutions for uplink synchronization in non-terrestrial network (NTN) communications are proposed. An apparatus implemented in a user equipment (UE) receives a system information block (SIB) of a target cell via a non-terrestrial (NT) network node of the NTN. The apparatus obtains an explicit epoch time from the SIB of the target cell. Then, the apparatus performs an uplink (UL) synchronization with the target cell through adjusting an uplink transmit time according to the explicit epoch time.
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公开(公告)号：US20210289460A1
公开(公告)日：2021-09-16
申请号：US17176117
申请日：2021-02-15
发明人： Abdelkader Medles , Gilles Charbit
摘要： Various solutions for timing advance (TA) reporting by a user equipment (UE) in non-terrestrial network (NTN) communications are described. An apparatus (e.g., a UE), capable of auto-compensation of time delays in signaling, establishes a wireless connection with a network node of a wireless network. The apparatus then transmits a TA report to the network node. Based on the TA, the network can configure a UE-specific offset for UL scheduling.
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6.发明申请公开(公告)号：US20200382207A1
公开(公告)日：2020-12-03
申请号：US16884570
申请日：2020-05-27
发明人： Abdelkader Medles , Gilles Charbit
摘要： Various solutions for hybrid automatic repeat request (HARQ) design in non-terrestrial network (NTN) communications with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine a maximum number of HARQ processes that the apparatus can support. The apparatus may transmit a capability report to indicate the maximum number of HARQ processes. The apparatus may perform HARQ process transmissions based on the maximum number of HARQ processes.
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公开(公告)号：US09713108B2
公开(公告)日：2017-07-18
申请号：US14511410
申请日：2014-10-10
发明人： Gilles Charbit , Feifei Sun
CPC分类号： H04W56/0015 , H04L7/027 , H04W4/70
摘要： A method of fast synchronization for low coverage machine type communication (MTC) devices is proposed. A machine-specific synchronization signal “mSYNC” with higher density in time and frequency is transmitted from each base station for fast timing and frequency acquisition and tracking. The mSYNC has a relatively longer periodicity (i.e., >>5 ms) to reduce overhead and inter-cell interference. The higher time-frequency density of mSYNC is designed to improve latency and power consumption by allowing the machine to wake up just before the scheduled mSYNC transmission time and to re-synchronize or track synchronization with the network without the need for long averaging time.
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公开(公告)号：US20230056527A1
公开(公告)日：2023-02-23
申请号：US17796541
申请日：2021-02-05
摘要： Various solutions for physical random access channel (PRACH) timing advance operation and PRACH configurations with respect to user equipment and network apparatus are described. An apparatus may determine a propagation delay between the apparatus and a network node. The apparatus may determine a pre-compensation timing margin. The apparatus may perform a timing advance pre-compensation according to the propagation delay and the pre-compensation timing margin. The apparatus may transmit an uplink signal by applying the timing advance pre-compensation.
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公开(公告)号：US20210120590A1
公开(公告)日：2021-04-22
申请号：US17012032
申请日：2020-09-03
发明人： Abdelkader Medles , Gilles Charbit
摘要： Various solutions for random access channel (RACH) preamble design in non-terrestrial network (NTN) communications with respect to user equipment and network apparatus are described. An apparatus may initiate a RACH procedure. The apparatus may determine a fractional frequency offset pattern or a cover code across groups of preamble sequences. The apparatus may generate a RACH preamble signal according to at least one of the fractional frequency offset pattern and the cover code. The apparatus may transmit the RACH preamble signal to a network node.
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公开(公告)号：US11528676B2
公开(公告)日：2022-12-13
申请号：US17176117
申请日：2021-02-15
发明人： Abdelkader Medles , Gilles Charbit
摘要： Various solutions for timing advance (TA) reporting by a user equipment (UE) in non-terrestrial network (NTN) communications are described. An apparatus (e.g., a UE), capable of auto-compensation of time delays in signaling, establishes a wireless connection with a network node of a wireless network. The apparatus then transmits a TA report to the network node. Based on the TA, the network can configure a UE-specific offset for UL scheduling.
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