公开(公告)号：US11202183B2

公开(公告)日：2021-12-14

申请号：US15187586

申请日：2016-06-20

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Wanshi Chen ,  Seyed Ali Akbar Fakoorian ,  Hao Xu ,  Yongbin Wei

IPC: H04W4/00 ,  H04W4/70 ,  H04L5/00 ,  H04W72/04 ,  H04L1/00 ,  H04W72/12 ,  H04B1/7136

Abstract: Methods, systems, and devices for wireless communication are described. User equipment (UE) and base stations may support frequency hopping with fast retuning for enhanced machine type communication (eMTC). For example, a UE may need to retune portions of its receive or transmit chain to support operation on various frequency bands, and it may perform the retune within a few symbols. Both base station and UE may anticipate or account for the retuning delay and communicate accordingly. A base station may refrain from transmitting for a certain period of time, for example. A base station may also account for frequency hopping delays for uplink communications. Systems may employ other techniques to support eMTC. For example, UEs may leverage reference signal patterns in certain control channels for demodulation. In some cases, base stations may alter control channel transmissions to account for various types of UEs with in the system.

公开(公告)号：US11153869B2

公开(公告)日：2021-10-19

申请号：US15889454

申请日：2018-02-06

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W28/18 ,  H04W72/12 ,  H04L5/00

Abstract: Certain aspects of the present disclosure relate to techniques for configuring an adaptive frame structure for wireless communications systems using unlicensed radio frequency spectrum. A base station (BS) may determine whether another device is transmitting on a channel in the unlicensed radio frequency spectrum or one or more other network conditions pertaining to the channel, determine a frame structure from a plurality of frame structures used for data communications based at least in part on the one or more network conditions, wherein each of the plurality of frame structures has a different frame duration, and communicate with a user equipment (UE) using the determined frame structure. A UE may determine a frame structure from a plurality of frame structures used for data communications, wherein each of the plurality of frame structures has a different frame duration, and communicate with a BS using the determined frame structure.

公开(公告)号：US11146296B2

公开(公告)日：2021-10-12

申请号：US15733711

申请日：2019-04-02

Applicant: QUALCOMM Incorporated ,  Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jing Jiang ,  Hao Xu

Inventor： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jing Jiang ,  Hao Xu

IPC: H03M13/45 ,  H03M13/00 ,  H03M13/13 ,  H03M13/43 ,  H04L1/18

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an encoding device may determine a least reliable subset of information bits included in a set of information bits that includes a predefined active set of information bits to be encoded; may determine a codeword bit to be added to a codeword based at least in part on the least reliable subset of information bits, wherein adding the codeword bit to the codeword improves reliability of the least reliable subset of information bits; may add the codeword bit to the codeword; and may transmit the codeword. Numerous other aspects are provided.

公开(公告)号：US11140681B2

公开(公告)日：2021-10-05

申请号：US16747902

申请日：2020-01-21

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Seyed Ali Akbar Fakoorian ,  Hao Xu

IPC: H04W72/08 ,  H04W4/70 ,  H04W88/08 ,  H04W88/02 ,  H04L5/00 ,  H04L5/14 ,  H04W72/04

Abstract: Aspects of the present disclosure provide techniques for wireless communications by a base station. An example method generally includes allocating uplink resources to one or more first type of user equipments (UEs) that communicate with the BS on a first frequency band that is narrower than a second frequency band used to communicate with a second type of UE, wherein the uplink resources are allocated in a narrowband subframe structure having a symbol duration determined based, at least in part, on characteristics of communications between the BS and the second type of UE using the second frequency band, and receiving uplink transmissions from the one or more first type of UEs on the allocated resources.

公开(公告)号：US11139931B2

公开(公告)日：2021-10-05

申请号：US15527291

申请日：2015-08-12

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Peter Gaal ,  Wanshi Chen ,  Hao Xu ,  Jilei Hou ,  Neng Wang

IPC: H04W16/06 ,  H04L5/14 ,  H04W16/14 ,  H04L5/00

Abstract: Methods, systems, and apparatuses are described for flexible transmissions on one or more frequency division duplexing resources. In some aspects, a subset of resources originally allocated for transmissions in a frequency division duplex (FDD) mode of operation associated with a first base station is identified for reallocation, and the identified subset of resources is reallocated to transmissions in a time division duplex (TDD) mode of operation, for example, associated with a second base station.

公开(公告)号：US11122541B2

公开(公告)日：2021-09-14

申请号：US16836460

申请日：2020-03-31

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Tao Luo ,  Tingfang Ji ,  Wanshi Chen ,  Peter Gaal ,  Yongbin Wei ,  Gavin Bernard Horn

IPC: H04W72/00 ,  H04W52/02 ,  H04W48/12 ,  H04W48/14

Abstract: The described aspects include methods and apparatus for activating a transmitter to communicate in a wireless network. A small cell can determine to activate the transmitter to serve user equipment (UE) in a wireless network. The small cell can then broadcast a portion of a set of broadcast signals in a radio frame and broadcast a remaining portion of the set of broadcast signals along with the portion of the set of broadcast signals in a subsequent radio frame. By refraining from immediately broadcasting all broadcast signals, the small cell can mitigate interference to other small cells. In addition, a UE can determine whether to generate random access channel (RACH) sequences for proximity determination or uplink timing synchronization based on parameters received in a RACH order. Moreover, a small cell with an active transmitter can decode discovery signals from a device to facilitate handover determination.

公开(公告)号：US11115977B2

公开(公告)日：2021-09-07

申请号：US16369308

申请日：2019-03-29

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Alberto Rico Alvarino ,  Peter Gaal ,  Wanshi Chen ,  Yongbin Wei ,  Juan Montojo ,  Renqiu Wang ,  Hao Xu ,  Xiaofeng Wang

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/20

Abstract: Aspects of the present disclosure provide techniques for uplink (UL) data channel design. An example method is provided for operations which may be performed by a first apparatus. The example method generally comprises determining a number of pilot symbols to transmit for one or more slots of a first subframe based, at least in part, on a coverage enhancement (CE) level, and transmitting at least one uplink data channel having the determined number of pilot symbols in the one or more slots of the first subframe.

公开(公告)号：US11115175B2

公开(公告)日：2021-09-07

申请号：US16563612

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Xiao Feng Wang ,  Alberto Rico Alvarino ,  Hao Xu

IPC: H04L5/14 ,  H04L1/00 ,  H04L27/26 ,  H04L5/00 ,  H04L5/22 ,  H04L5/26 ,  H04W72/04 ,  H04W74/08 ,  H04L1/08 ,  H04L25/02

Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a narrowband TDD frame structure for narrowband communications. The apparatus may also determine a PUSCH format of a group of PUSCH formats for allocating at least one RU to a UE for a NPUCCH. In addition, the apparatus may allocate the at least one RU to the UE using the determined PUSCH format. In one aspect, the RU may include one or more subcarriers in each of one or more slots.

公开(公告)号：US11102779B2

公开(公告)日：2021-08-24

申请号：US15610869

申请日：2017-06-01

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Alberto Rico Alvarino ,  Hao Xu ,  Wanshi Chen ,  Juan Montojo ,  Yongbin Wei ,  Peter Gaal

IPC: H04W72/04 ,  H04L5/00 ,  H04B1/713 ,  H04W56/00

Abstract: Various aspects of utilizing narrowband internet of things (NB IOT) communication are still under development. According to an aspect of the disclosure, the apparatus may be a user equipment (UE) for wireless communication via narrowband internet of things (NB IOT) in an unlicensed spectrum using frequency hopping and digital modulation. The UE performs a synchronization with a base station via at least one of a licensed spectrum or the unlicensed spectrum. The UE communicates with the base station based on the synchronization.

公开(公告)号：US11082947B2

公开(公告)日：2021-08-03

申请号：US16559685

申请日：2019-09-04

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Hao Xu ,  Wanshi Chen ,  Peter Gaal ,  Masato Kitazoe ,  Miguel Griot

IPC: H04W68/02 ,  H04W4/06 ,  H04W4/70 ,  H04W68/00 ,  H04W72/04 ,  H04W74/08

Abstract: Certain aspects of the present disclosure generally relate to wireless communications, and more specifically to enhanced paging procedures for devices with limited communications resources, such as machine type communication (MTC) devices and enhanced or evolved MTC (eMTC) devices. An example method generally includes determining a set of subframes corresponding to a paging occasion for the UE to receive a paging message from a base station (BS), determining, within the set of subframes, at least one narrowband region for receiving the paging message, and monitoring for the paging message in the at least one narrowband region within the set of subframes.