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71.发明授权公开(公告)号：US10389500B2
公开(公告)日：2019-08-20
申请号：US15410057
申请日：2017-01-19
发明人： Shimman Patel , Wanshi Chen , Juan Montojo , Peter Gaal , Seyedkianoush Hosseini , Aleksandar Damnjanovic , Hao Xu
IPC分类号： H04L5/00 , H04B7/0413 , H04W72/04
摘要： The present methods and apparatus enable transmission of an interlaced reference signal for two UEs using a comb structure. In some aspects, the present methods and apparatus may allocate resources and indicate whether a first UE and a second UE are to transmit DM-RS with a comb structure in a single slot based on the allocation. Further, in some aspects, the present methods and apparatus may allocate resources and transmit information indicating whether a first UE is to transmit DM-RS in a first slot or in both a first slot and a second slot within a subframe.
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公开(公告)号：US10362487B2
公开(公告)日：2019-07-23
申请号：US15451263
申请日：2017-03-06
发明人： Wanshi Chen , Peter Gaal , Durga Prasad Malladi , Tao Luo , Aleksandar Damnjanovic , Naga Bhushan , Tingfang Ji , Yongbin Wei
摘要： Long term evolution (LTE)/LTE-Advanced (LTE-A) deployments with unlicensed spectrum leverage more efficient LTE communication aspects over unlicensed spectrum, such as over WIFI radio access technology. In order to accommodate such communications, various downlink procedures may be modified in order to handle communications between licensed and unlicensed spectrum with LTE/LTE-A deployments with unlicensed spectrum.
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公开(公告)号：US20190215859A1
公开(公告)日：2019-07-11
申请号：US16355105
申请日：2019-03-15
发明人： Jing Sun , Wanshi Chen , Peter Gaal , Shimman Arvind Patel , Aleksandar Damnjanovic , Hao Xu , Juan Montojo
摘要： Methods, systems, and devices for wireless communication are described. Different transmission time interval (TTI) durations may be supported and configured to coexist with one another. A set of TTIs with a relatively short duration may overlap in time with longer duration TTIs. Boundaries of TTIs with a relatively short duration may be configured to align with boundaries of relatively longer duration TTIs. For example, TTIs that are a Long Term Evolution (LTE) subframe, an LTE slot, and a duration of two LTE symbol periods may be supported. Two-symbol period TTIs may align with or be embedded within slot-duration TTIs, which, in turn, may align with or be embedded within a subframe. In some examples, one or more symbol periods of a subframe may be designated as a gap between two-symbol TTIs within the subframe, or such symbols may be merged with a two-symbol TTI within the subframe.
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公开(公告)号：US10313916B2
公开(公告)日：2019-06-04
申请号：US14937017
申请日：2015-11-10
发明人： Jun Wang , Ozcan Ozturk , Miguel Griot , Ravindra Manohar Patwardhan , Onkar Jayant Dabeer , Madhavan Srinivasan Vajapeyam , Jelena Damnjanovic , Aleksandar Damnjanovic , Taesang Yoo , Yongbin Wei , Durga Prasad Malladi
摘要： Methods, systems, and devices are described for decreasing user plane latency in a wireless communication system. This may include routing a portion of bearer traffic to or from a UE through a local or serving gateway, or within or between base stations, rather than via the core network. In some examples, techniques for selected internet protocol flow ultra-low latency (SIPFULL) for systems in which users may have subscribed to enhanced services may be employed. The network may, for instance, authorize SIPFULL functionalities for UEs per access point name (APN) based on individual services subscribed by the UE to improve overall quality of service (QoS). In some examples, a UEs latency requirements or SIPFULL authorizations may affect mobility operations.
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75.发明授权公开(公告)号：US10306632B2
公开(公告)日：2019-05-28
申请号：US14865640
申请日：2015-09-25
发明人： Peter Gaal , Srinivas Yerramalli , Durga Prasad Malladi , Naga Bhushan , Yongbin Wei , Tao Luo , Hao Xu , Wanshi Chen , Shimman Arvind Patel , Aleksandar Damnjanovic , Xiaoxia Zhang
摘要： Techniques are described for wireless communication. A first method includes winning a contention for access to an unlicensed radio frequency spectrum band, and transmitting at least a portion of a channel usage beacon signal (CUBS) over the unlicensed radio frequency spectrum band. The at least portion of the CUBS is transmitted in a number of frequency interlaces of the unlicensed radio frequency spectrum band. A second method includes winning a contention for access to an unlicensed radio frequency spectrum band; determining whether the contention is won within a threshold time before a next symbol period boundary; and transmitting at least a portion of a CUBS over the unlicensed radio frequency spectrum band. The at least portion of the CUBS is transmitted during a preamble including a fractional period of a first symbol period. The at least portion of the CUBS may be based at least in part on the determining.
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公开(公告)号：US20190141723A1
公开(公告)日：2019-05-09
申请号：US16155515
申请日：2018-10-09
发明人： Xiaoxia Zhang , Tamer Kadous , Yongbin Wei , Zhifei Fan , Jing Sun , Aleksandar Damnjanovic , Bin Tian
摘要： Wireless communications systems and methods related to signaling medium reservation information medium sharing among multiple radio technologies (RATs) are provided. A wireless communication device of a first RAT detects a channel reservation signal of a second RAT in a spectrum shared by the first RAT and the second RAT. The wireless communication device determines whether the channel reservation signal indicates a first transmission opportunity (TXOP) duration or a second TXOP duration that is different from the first TXOP duration. The wireless communication device selects, based on the determination, at least one of performing a backoff or continuing to monitor the spectrum.
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公开(公告)号：US20190132869A1
公开(公告)日：2019-05-02
申请号：US16162774
申请日：2018-10-17
发明人： Aleksandar Damnjanovic , Andrei Dragos Radulescu , Arumugam Chendamarai Kannan , Jing Sun , Xiaoxia Zhang
摘要： Methods, systems, and devices for wireless communications are described. A transmitter may include an interference avoidance preamble in a wireless transmission. The interference avoidance preamble may identify resources for transmitting an interference avoidance request associated with the wireless transmission. A receiver may experience interference between the wireless transmission and another wireless transmission, and the receiver may transmit the interference avoidance request using the resources identified in the interference avoidance preamble. The transmitter may receive the interference avoidance request and, in response, may enable an interference avoidance mechanism, for example, a listen before talk (LBT) procedure, a frequency-division multiplexing (FDM) scheme, a time-division multiplexing (TDM) scheme, a spatial multiplexing scheme, or a combination.
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公开(公告)号：US20190124518A1
公开(公告)日：2019-04-25
申请号：US16227121
申请日：2018-12-20
发明人： Xiaoxia Zhang , Siddhartha Mallik , Taesang Yoo , Juan Montojo , Aleksandar Damnjanovic , Junyi Li
摘要： Wireless communications systems and methods related to reservation signal transmission and detection for spectrum sharing are provided. A first wireless communication device communicates, with a second wireless communication device, a reservation request (RRQ) signal to reserve a transmission opportunity (TXOP) in a shared spectrum, wherein the shared spectrum is shared by a plurality of network operating entities, and wherein the first wireless communication device and the second wireless communication device are associated with a first network operating entity of the plurality of network operating entities. The first wireless communication device transmits a reservation response (RRS) signal indicating an interference tolerance level of the first wireless communication device.
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公开(公告)号：US20190104547A1
公开(公告)日：2019-04-04
申请号：US16141616
申请日：2018-09-25
IPC分类号： H04W74/08 , H04W16/14 , H04B7/0413 , H04B7/06
摘要： Improvements to asynchronous spatial listen before talk (LBT) procedures are disclosed. In a shared spectrum network spatial LBT procedures are used for directionally targeting the channel reservation process. Prior to transmitting channel reservation signaling, the transmitter and receiver determine an effective interference considering available multiple input, multiple output (MIMO) configuration information. When the effective interference exceeds a predefined threshold, the node may without transmission of its channel reservation signal. Otherwise, when the effective interference remains within the threshold, each node's transmitted channel reservation signal may also identify at least a beamforming matrix either as payload or used to precede the node's channel reservation signal.
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公开(公告)号：US20190090239A1
公开(公告)日：2019-03-21
申请号：US16196622
申请日：2018-11-20
发明人： Jelena Damnjanovic , Aleksandar Damnjanovic , Taesang Yoo , Siddhartha Mallik , Madhavan Srinivasan Vajapeyam , Durga Prasad Malladi , Yongbin Wei
摘要： Techniques are described for preempting resource allocations to one or more UEs in the event that delay sensitive data is received. A resource allocation of a number of symbols may be granted to a first user equipment (UE) for first associated data to be transmitted. Subsequently, data may be received for a second UE that is more delay sensitive than the first data. The resource allocation to the first UE may be preempted, and resources allocated to the second UE for the second data within a variable length transmission time interval (TTI) of the resource allocation to the first UE. UEs may monitor for preemption during transmissions to other UEs in order to receive new resource grants associated with the preempted resource grant. Whether a UE monitors transmissions for preemption may be determined based on a quality or service (QoS) of the UE.
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