公开(公告)号：US20180359656A1

公开(公告)日：2018-12-13

申请号：US15892183

申请日：2018-02-08

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Andrei Dragos Radulescu ,  Tamer Kadous

IPC: H04W28/02 ,  H04W72/04 ,  H04L5/00 ,  H04W48/16 ,  H04W24/02

CPC classification number: H04W28/0289 ,  H04L5/0048 ,  H04W24/02 ,  H04W48/12 ,  H04W48/16 ,  H04W72/042 ,  H04W72/0446

Abstract: Configurations of system information blocks providing cell access information supporting wideband coverage enhancement in wireless communication networks are disclosed. Embodiments encode and transmit information elements for both a legacy system information block and a wideband coverage enhancement system information block in a multiple subframe discovery reference signal configuration. For example, embodiments may utilize a two subframe CR-DRS configuration in which a WCE SIB-MF1 message payload is encoded and transmitted independently with respect to a legacy SIB-MF1 message payload. Additionally, or alternatively, embodiment may utilize a two subframe CR-DRS configuration in which both a legacy SIB-MF1 message payload and a WCE SIB-MF1 message payload share the same DRS subframe payload by jointly encoding the legacy SIB-MF1 and WCE SIB-MF1 messages.

公开(公告)号：US20180343676A1

公开(公告)日：2018-11-29

申请号：US15987511

申请日：2018-05-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W16/14 ,  H04W56/00

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems utilizing shared radio frequency spectrum bands, base stations may operate in different listen before talk (LBT) modes. For example, a base station may operate in an LBT enabled mode or a non-LBT enabled mode. A UE may perform system acquisition with the base station based on receiving acquisition signals (e.g., synchronization signals and physical broadcast channel (PBCH) signals) from the base station. These acquisition signals may depend on the LBT mode of the base station. For example, the frame timing and number of subframes for the acquisition signals may be based on the LBT mode of the base station. In some cases, a base station may adaptively switch LBT modes, and the UE may re-synchronize with the base station based on an LBT configuration period or a paging message from the base station.

公开(公告)号：US20180343156A1

公开(公告)日：2018-11-29

申请号：US15975207

申请日：2018-05-09

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Aleksandar Damnjanovic ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Tamer Kadous ,  Yongbin Wei

IPC: H04L27/26 ,  H04L5/00 ,  H04J11/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may perform an access procedure to obtain access to a shared radio frequency spectrum band during a measurement window and generate a synchronization signal (SS) burst comprising a plurality of SS blocks. The base station may perform a beam sweeping first transmission of the SS burst over the shared radio frequency spectrum based at least in part on the access procedure. In the first transmission or a second transmission, the base station may transmit at least one of a first indication of a time of access to the shared radio frequency spectrum band with respect to the measurement window, a second indication of a transmission beam associated with the SS block, and a third indication of a quantity of remaining SS blocks from the plurality of SS blocks to follow the SS block in the measurement window.

公开(公告)号：US10123335B2

公开(公告)日：2018-11-06

申请号：US15198481

申请日：2016-06-30

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo

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

Abstract: Methods, systems, and devices are described for wireless communications. The described techniques include separation of communication resources into resource sets based on data service sets for multiple base stations operating over a carrier of a shared spectrum. The base stations may use synchronized communication time resources. Each data service set may include one or more QoS types and/or communication services. Listen before talk (LBT) parameters for contention procedures performed in different resource sets may be different. A UE configured for communication over the carrier may employ a resource set based discontinuous reception (DRX) mode where a sleep mode is entered for resource sets not associated with active communications by the UE. Channel state information (CSI) reporting may be separated by resource sets for the carrier.

公开(公告)号：US10091788B2

公开(公告)日：2018-10-02

申请号：US15230042

申请日：2016-08-05

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Qingsi Wang ,  Maarten Menzo Wentink ,  Marco Papaleo ,  Srinivas Yerramalli ,  Onkar Jayant Dabeer

IPC: H04W72/04 ,  H04W74/02 ,  H04W74/08 ,  H04L5/00 ,  H04W16/14 ,  H04W72/12 ,  H04W88/10 ,  H04W88/02

Abstract: Techniques for adjusting a contention window (CW) for transmissions in a shared radio frequency spectrum band may include identifying a number of nodes attempting to transmit using a channel of a shared radio frequency spectrum band and determining a target CW based on the number of nodes attempting to transmit. A new CW value may then be determined based on a prior CW value and the target CW value, and a listen-before-talk (LBT) procedure (e.g., a clear channel assessment (CCA)) to access the channel of the shared radio frequency spectrum band may be performed to access the channel.

公开(公告)号：US09918341B2

公开(公告)日：2018-03-13

申请号：US15153516

申请日：2016-05-12

Applicant: QUALCOMM Incorporated

Inventor： Marco Papaleo ,  Srinivas Yerramalli ,  Aleksandar Damnjanovic ,  Tao Luo ,  Peter Gaal ,  Durga Prasad Malladi

IPC: H04W4/00 ,  H04W74/08 ,  H04W72/04 ,  H04W84/20 ,  H04W72/12

CPC classification number: H04W74/08 ,  H04W72/0446 ,  H04W72/1289 ,  H04W84/20

Abstract: In order to provide a generic access rule, the present disclosure proposes a new potential set of adaptivity rules for LBE based on LBT. The generic access rule of the present disclosure provides LTE-U and Wi-Fi coexistence and DL/UL coexistence in both LTE-U and Wi-Fi. The apparatus receives, from the first master device, a resource allocation for communicating with the second master device. The apparatus also determines a type of CCA procedure to perform before communicating with the second master device on an unlicensed channel. The apparatus further performs a CCA procedure to obtain a transmission opportunity based on the determining, the CCA procedure being one of an ICCA procedure or an ECCA procedure. In addition, the apparatus transmit data to the second master device in accordance with the resource allocation on the unlicensed channel when the transmission opportunity is obtained.

公开(公告)号：US09918302B2

公开(公告)日：2018-03-13

申请号：US14959659

申请日：2015-12-04

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tao Luo ,  Durga Prasad Malladi ,  Yongbin Wei

IPC: H04W72/04 ,  H04W28/06 ,  H04J13/00 ,  H04W76/04 ,  H04W72/12 ,  H04L5/00 ,  H04L5/14

CPC classification number: H04W72/0413 ,  H04J13/0048 ,  H04L5/001 ,  H04L5/0026 ,  H04L5/0032 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0091 ,  H04L5/14 ,  H04W28/06 ,  H04W72/1252 ,  H04W76/27

Abstract: A first method for wireless communications may comprise determining sizes of payloads of user equipment (UEs), determining whether to multiplex the payloads of the UEs based on the sizes of the payloads, and allocating codes or cyclic shifts to the UEs to transmit the payloads on a single interlace of resources. A second method for wireless communications may comprise determining a first code or a first cyclic shift used for a first transmission using an interlace of resources, and allocating second codes or second cyclic shifts to UEs for a second transmission, where the second transmission may be multiplexed with the first transmission on the interlace of resources. A third method for wireless communications may comprise allocating a first interlace of resources for a first transmission for occupying an unlicensed radio frequency spectrum band, and allocating a second interlace of resources, occupied by a base station, for a second transmission.

公开(公告)号：US20180070243A1

公开(公告)日：2018-03-08

申请号：US15644517

申请日：2017-07-07

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Chirag Patel ,  Tamer Kadous ,  Hao Xu

IPC: H04W16/14 ,  H04W74/08 ,  H04W4/00 ,  H04L5/14 ,  H04W76/04

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and base station may communicate using narrow band internet of things (NB-IoT) techniques or enhanced machine type communication (eMTC) in unlicensed spectrum. The UE may be an eMTC device or another device capable of communication without user direction. The UE may identify a geographic region and select a communication mode that is consistent with regulatory restrictions in that region. For example, in some cases, the communication mode may be based on using time division duplexing (TDD), using frequency hopping, or performing a listen-before-talk (LBT) procedure at the base station. A frame structure for TDD may include LBT subframes, uplink portions, downlink portions, and special subframes for switching. The base station may perform LBT procedures in the LBT subframes. If frequency hopping is enabled, a configurable number of TDD frames may be grouped into a hopping frame block.

公开(公告)号：US20180007707A1

公开(公告)日：2018-01-04

申请号：US15633626

申请日：2017-06-26

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Wanshi Chen ,  Hao Xu ,  Peter Gaal ,  Srinivas Yerramalli ,  Jing Sun

IPC: H04W72/12 ,  H04L12/54 ,  H04L5/00 ,  H04L12/28 ,  H04W28/02 ,  H04L29/06

CPC classification number: H04W72/1263 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/0096 ,  H04L5/1469 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04W28/02

Abstract: A user equipment (UE) may transmit a sounding reference signal (SRS) on a component carrier (CC) that is otherwise configured for downlink communications. Due to a carrier aggregation configuration or UE capability, the UE may need to retune certain components to transmit on the CC. If the SRS transmission, including the retuning time, collides with another transmission (e.g., in uplink or downlink) the UE may drop the SRS, drop the other transmission, or puncture the other transmission to facilitate the SRS transmission. The determination about a collision may depend on the retuning time, channel, or type of control information in the other transmission. In some cases, a UE may drop the other transmission if transmitting the SRS would prevent the UE from transmitting a demodulation reference signal, hybrid automatic repeat request (HARD) feedback. In some cases, the determination may be based upon a prioritization and may also depend on a subsequent subframe.

公开(公告)号：US20180006787A1

公开(公告)日：2018-01-04

申请号：US15462356

申请日：2017-03-17

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Jing Sun ,  Alberto Rico Alvarino ,  Srinivas Yerramalli

IPC: H04L5/00

Abstract: Techniques for wireless communication are described. A method for wireless communication at a user equipment (UE) includes identifying a physical uplink shared channel (PUSCH) to transmit in an uplink pilot time slot (UpPTS) of a subframe, determining whether to transmit uplink control information (UCI) on the PUSCH in the UpPTS, and transmitting the PUSCH in the UpPTS based at least in part on the determining. A method for wireless communication at a network access device includes determining whether to schedule a transmission of UCI on a PUSCH in a UpPTS of a subframe, scheduling the PUSCH in the UpPTS based at least in part on the determining, and transmitting, to a UE, scheduling information for the PUSCH in the UpPTS.