公开(公告)号：US10200904B2

公开(公告)日：2019-02-05

申请号：US15157612

申请日：2016-05-18

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Siddhartha Mallik ,  Srinivas Yerramalli ,  Taesang Yoo ,  Tao Luo

IPC: H04W24/10 ,  H04L5/00 ,  H04L27/00 ,  H04L12/24 ,  H04W24/08 ,  H04W72/08

Abstract: Measurement and demodulation may be impacted by varying transmit power due to varying numbers of carriers in a shared radio frequency (RF) spectrum band. Methods, systems, and devices are described for wireless communication. One method includes monitoring at least one carrier of a RF spectrum band for a first reference signal transmitted in a number of listen-before-talk (LBT) radio frames from a plurality of LBT radio frames associated with the plurality of carriers, where the plurality of LBT radio frames are received at the user equipment (UE) in different sets of at least one carrier of the RF spectrum band at different times, and where the first reference signal is associated with a first fixed transmit power; receiving a plurality of instances of the first reference signal; measuring the plurality of instances; and determining a cell measurement based at least in part on the measurements of the plurality of instances.

公开(公告)号：US10194466B2

公开(公告)日：2019-01-29

申请号：US14518715

申请日：2014-10-20

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Naga Bhushan ,  Srinivas Yerramalli ,  Wanshi Chen ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Tao Luo ,  Durga Prasad Malladi ,  Yongbin Wei

IPC: H04W74/04 ,  H04W72/04 ,  H04W16/14 ,  H04W74/08

Abstract: Management of shared transmission resources is disclosed for multiple radio access networks (RANs) sharing access to a finite number of transmission slots. Multiple permutations of slot assignments are configured in which each competing network is assigned a specific slot in each permutation. The sequence of permutations provides a fair distribution of spectrum access by the competing networks, such that in each permutation of the permutation sequence, networks assigned to lower priority slots may be assigned to higher priority slots in later permutations.

公开(公告)号：US20190014589A1

公开(公告)日：2019-01-10

申请号：US15991591

申请日：2018-05-29

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W72/12 ,  G06F1/32 ,  H04L5/00 ,  H04W52/02

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may schedule an autonomous uplink (UL) transmission and a scheduled UL transmission during the same time period. The wireless device may determine that it is operating in a limited power state and therefore cannot transmit both the autonomous UL transmission and the scheduled UL transmission. The wireless device may prioritize one of the autonomous UL transmission and the scheduled UL transmission based at least in part on a priority configuration. The wireless device may receive the priority configuration from a base station (e.g., in radio resource control signaling).

公开(公告)号：US20190014481A1

公开(公告)日：2019-01-10

申请号：US16024289

申请日：2018-06-29

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Andrei Dragos Radulescu ,  Tao Luo ,  Tamer Kadous ,  Aleksandar Damnjanovic

IPC: H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04L5/00 ,  H04W24/10 ,  H04W72/08 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmission of uplink data from a user equipment (UE) in the absence of scheduled uplink resources for the uplink data transmission that are allocated to the UE prior to the transmission of the uplink data. Various examples provide frame structures that may be used for unscheduled uplink transmissions of a UE. Unscheduled uplink transmissions may be transmitted in a shared or unlicensed radio frequency spectrum, and access to the shared or unlicensed radio frequency spectrum may be determined based on a priority of an operator associated with a UE for accessing the spectrum. Beamforming techniques may be used for uplink and downlink transmissions and beam widths for beamformed transmissions may be selected based on the information transmitted in a transmission, an operator priority for use of shared radio frequency spectrum, or any combination thereof.

公开(公告)号：US20180309479A1

公开(公告)日：2018-10-25

申请号：US15854380

申请日：2017-12-26

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous ,  Chih-Hao Liu

IPC: H04B1/7143 ,  H04W8/00 ,  H04L5/00 ,  H04W16/14

CPC classification number: H04B1/7143 ,  H04J3/00 ,  H04L5/0012 ,  H04L5/0055 ,  H04L5/0092 ,  H04L27/0006 ,  H04W8/005 ,  H04W16/10 ,  H04W16/14 ,  H04W48/12

Abstract: Methods, systems, and devices for wireless communication are described that provide for a base station to use frequency hopping for cell acquisition according to a frequency hopping pattern. The frequency hopping pattern may include a set of anchor channels and a set of non-anchor channels used by a base station to communicate with wireless devices. The base station may occupy an anchor channel more often than a non-anchor channel and may transmit acquisition signals using the anchor channel. The anchor channel may also be used by the base station and a user equipment (UE) to exchange paging information, positioning information, random access resources, location of other channels, etc.

公开(公告)号：US10104565B2

公开(公告)日：2018-10-16

申请号：US14565063

申请日：2014-12-09

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Wanshi Chen ,  Tao Luo ,  Peter Gaal ,  Durga Prasad Malladi ,  Yongbin Wei ,  Hao Xu ,  Tingfang Ji ,  Naga Bhushan ,  Aleksandar Damnjanovic

IPC: H04W72/04 ,  H04L5/00 ,  H04W24/10 ,  H04W16/14 ,  H04W74/08 ,  H04W84/12

Abstract: Channel state information (CSI) feedback in long term evolution (LTE) and LTE-Advanced (LTE-A) networks including unlicensed spectrum is disclosed in which a base station obtains clear channel assessment (CCA) result information from neighboring base stations, either directly or by determining such results from measurement or reports from user equipment (UE) served by the base station. The base station may then generate control signaling based on the CCA result information for transmission to the one or more UEs served by the base station.

公开(公告)号：US10080142B2

公开(公告)日：2018-09-18

申请号：US15080217

申请日：2016-03-24

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Hao Xu ,  Srinivas Yerramalli ,  Tao Luo

IPC: H04W16/14 ,  H04L5/00 ,  H04L27/00 ,  H04B17/345

CPC classification number: H04W16/14 ,  H04B17/345 ,  H04L5/001 ,  H04L5/003 ,  H04L5/0048 ,  H04L5/0051 ,  H04L27/0006

Abstract: Systems, methods, and apparatuses for detecting interference caused by a wireless local area network (WLAN) and a wireless wide area network (WWAN) node operating in an unlicensed or shared spectrum is disclosed. In accordance with the present disclosure, a base station may generate a null tone pattern for one or more subframes transmitted to the UE. The null tone pattern may include one or more null tones mapped to consecutive symbols in each resource block to detect interference. Accordingly, a UE may monitor a wireless channel from a base station for a null tone transmission. The UE may detect a null tone pattern by decoding a known physical layer channel to identify the null tone pattern. In some aspects, the UE may generate channel estimates, decode allocated resources, determine timing of future transmissions and/or establish communication with the base station based on the identified null tone pattern.

公开(公告)号：US10051660B2

公开(公告)日：2018-08-14

申请号：US14490503

申请日：2014-09-18

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Wanshi Chen ,  Hao Xu

IPC: H04W74/08 ,  H04W16/14 ,  H04W72/12 ,  H04L5/00

Abstract: Methods, systems, apparatuses, and devices are described for wireless communication. From a plurality of physical carriers associated with a clear channel assessment (CCA) performed by a device, one of the physical carriers for which the CCA was successful may be identified. A virtual carrier associated with a wireless data transmission by the device may be mapped to the identified one of the physical carriers.

公开(公告)号：US20180227944A1

公开(公告)日：2018-08-09

申请号：US15880507

申请日：2018-01-25

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Adel Kadous

IPC: H04W72/14 ,  H04W72/12 ,  H04W72/04

CPC classification number: H04W72/14 ,  H04L1/08 ,  H04W28/0215 ,  H04W72/042 ,  H04W72/1268 ,  H04W72/1289 ,  H04W74/0808

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive an uplink grant that conveys an indication of a multi-transmission opportunity (TxOP) grant. The UE may transmit, during a first TxOP, a first uplink transmission in one or more subframes in accordance with the multi-TxOP grant. The UE may transmit, during a second TxOP, a second uplink transmission in one or more subframes in accordance with the multi-TxOP grant.

公开(公告)号：US10014970B2

公开(公告)日：2018-07-03

申请号：US15041635

申请日：2016-02-11

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Vikas Jain ,  Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Kiran Kumar Somasundaram

IPC: H04W4/00 ,  H04J11/00 ,  H04W74/08 ,  H04W16/14 ,  H04W72/12

CPC classification number: H04J11/0056 ,  H04W16/14 ,  H04W72/1268 ,  H04W74/0808

Abstract: Mitigation of inter-base station resynchronization loss in wireless networks including contention-based shared frequency spectrum is discussed. Aspects of such mitigation provide for base stations entering into an idle mode when a transmission opportunity occurs in a radio frame of the next resynchronization occasion. Additional aspects provide for the base station to signal a flexible listen before talk (LBT) frame length to the user equipment (UE), either with or without explicit signaling of the downlink-uplink division. Further aspects provide for the base station to signal a reset indication to UEs that will prompt the UEs to monitor for downlink channel reserving signals prior to the current LBT frame ending by the resynchronization occasion.