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公开(公告)号：US20200252967A1
公开(公告)日：2020-08-06
申请号：US16752484
申请日：2020-01-24
发明人： Ozcan Ozturk , Xiaoxia Zhang , Tao Luo , Muhammad Nazmul Islam , Jing Sun , Sony Akkarakaran
IPC分类号： H04W74/08 , H04W56/00 , H04L1/00 , H04L5/00 , H04W24/10 , H04B17/318 , H04B17/336 , H04W68/00 , H04W80/02 , H04W76/27
摘要： Methods, systems, and devices for wireless communications are described. Examples may include receiving, at a user equipment (UE) a random access channel (RACH) configuration message from a base station, where the message indicates a channel metric (e.g., received signal strength indicator (RSSI), reference signal received power (RSRP), reference signal received quality (RSRQ), a signal-to-noise ratio (SNR), signal-to-interference-plus-noise ratio (SINR), or the like) and a threshold associated with the channel metric. The, UE may measure a reference signal (e.g., synchronization signal block (SSB), channel state information reference signal (CSI-RS), or the like) and select a RACH procedure based on comparing the measured channel metric to the threshold. For example, the UE may select a two-step RACH procedure if the measured channel metric satisfies the threshold specified in the configuration. In some cases, the UE may select a RACH procedure or a listen-before-talk (LBT) procedure based on a QoS parameter.
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公开(公告)号：US10721054B2
公开(公告)日：2020-07-21
申请号：US16273440
申请日：2019-02-12
摘要： Methods, systems, and devices for wireless communications are described. A scheduled node may transmit, by a first node in the network and to a second node in the network, an indication of a first temporal pattern of communication states for communication by the first node on a first set of resources, the first node being configured for half-duplex communications. The scheduled node may receive, from the second node, a grant of resources for performing communications on a second set of resources that are multiplexed with the first set of resources in a frequency domain, a spatial domain, or a combination thereof.
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公开(公告)号：US10708953B2
公开(公告)日：2020-07-07
申请号：US15391425
申请日：2016-12-27
摘要： Aspects of the disclosure relate to improvements in random access procedures within a wireless communication network. To increase the likelihood that a user equipment (UE) will properly decode a random access response message from a base station, the base station may retransmit the random access response message one or more times. The number of retransmissions may be fixed or may be variable depending on whether the base station is able to receive or successfully decode a subsequently transmitted uplink message.
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公开(公告)号：US10708111B2
公开(公告)日：2020-07-07
申请号：US16301423
申请日：2017-02-14
摘要： Various aspects of the disclosure relate to communicating random access information and uplink control information. In some aspects, a user equipment (UE) or other suitable apparatus transmits physical uplink control channel (PUCCH) information concurrently with random access channel (RACH) information transmitted by another UE or other apparatus. For example, the RACH access information and the PUCCH information may be frequency division multiplexed orthogonal tones. The disclosure relates in some aspects to using downlink-uplink (DL-UL) channel reciprocity to determine symbol and/or tone locations. For example, a base station or other suitable apparatus may initially sweep across different directions in different time slots to transmit signals during a synchronization sub-frame. A UE or other suitable apparatus can then find an appropriate RACH symbol from its best synchronization beam index and transmit PUCCH information in those symbols.
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公开(公告)号：US10701727B2
公开(公告)日：2020-06-30
申请号：US16017614
申请日：2018-06-25
发明人： Karl Georg Hampel , Junyi Li , Sundar Subramanian , Muhammad Nazmul Islam , Navid Abedini , Juergen Cezanne
摘要： Certain aspects of the present disclosure generally relate to wireless communication. A wireless node may receive a first scheduling command identifying a first resource allocation via a first link, may determine a second resource allocation based at least in part on the first resource allocation and a resource allocation policy, may transmit a second scheduling command identifying the second resource allocation via a second link, and may communicate network traffic on the first link and the second link using the first resource allocation and the second resource allocation, respectively. Numerous other aspects are provided.
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公开(公告)号：US10693605B2
公开(公告)日：2020-06-23
申请号：US15690820
申请日：2017-08-30
摘要： A RACH preamble is transmitted from a UE using multiple antenna ports. A UE splits a data stream containing a RACH preamble into multiple streams corresponding to a same number of antenna ports of the UE. The UE multiplexes the copies of the RACH preamble according to a multiplexing scheme that enables a receiving eNB to discern the different channels used to transmit the signal from the different antenna ports. A RACH procedure is further accomplished in two steps instead of four by the UE then splitting a RACH payload to the same number of streams and multiplexing the RACH payload for transmission to the eNB. The eNB receives both transmissions, and may use the RACH preamble as a reference signal, and responds with a combined message with control information, random access response, and contention resolution information.
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公开(公告)号：US10674540B2
公开(公告)日：2020-06-02
申请号：US16184825
申请日：2018-11-08
发明人： Muhammad Nazmul Islam , Junyi Li , Sundar Subramanian , Jung Ryu
摘要： Techniques for procedures using request to send/clear to send (RTS/CTS) procedures and multiple timers are described. A RTS/CTS procedure using multiple timers may use a first timer and a second timer. The first timer may be associated with a duration to transmit and receive a request to send (RTS) message and a clear to send (CTS) message. The second timer may be associated with a duration to transmit a data message. A network device may transmit a RTS message to request communication resources to transmit data. If the CTS message is not received prior to the expiration of the first timer, neighboring network devices may determine that the communication resources were not allocated and may attempt to request the newly available resources. If a CTS message is received, the network device may communicate the second timer data to the neighboring network devices in a variety of ways.
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公开(公告)号：US10609661B2
公开(公告)日：2020-03-31
申请号：US15968598
申请日：2018-05-01
摘要： Certain aspects of the present disclosure relate to methods and apparatus for conveying timing information that changes across a transmission time interval (TTI) in which multiple redundancy versions of a physical broadcast channel (PBCH) are transmitted.
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公开(公告)号：US10560910B2
公开(公告)日：2020-02-11
申请号：US15926884
申请日：2018-03-20
摘要： An apparatus is provided for wireless communication at a base station with improved PBCH construction and decoding. The base station apparatus constructs a PBCH payload, wherein a bit location is selected for encoding a plurality of bits of the PBCH based on an estimated reliability for the corresponding bits location wherein the plurality of bits comprises frozen bits, unknown bits that are unknown to a user equipment, and potentially known bits that are potentially known by the user equipment. The apparatus transmits the PBCH payload in at least one of a plurality of SS blocks. A UE receiving the PBCH decodes the PBCH based on a successive decoding order. The successive decoding order may be based on an estimated reliability for the corresponding bits, e.g., in which potentially known bits are decoded prior to unknown bits.
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公开(公告)号：US10548100B2
公开(公告)日：2020-01-28
申请号：US15462629
申请日：2017-03-17
摘要： The base station that is configured to transmit in a beamformed manner may set different transmission rates for different directions of the beams. During an initial access stage, the base station may set different transmission rates for different transmission directions, and may transmit initial access signals based on the transmission rates in the different transmission directions The apparatus may be a base station. The base station determines transmission rates for a plurality of transmission directions, where each transmission rate is determined for a respective transmission direction of the plurality of transmission directions. The base station transmits at least one initial access signal in each of one or more of the plurality of transmission directions based on a corresponding transmission rate of the transmission rates.
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