公开(公告)号：US20190273586A1

公开(公告)日：2019-09-05

申请号：US16417427

申请日：2019-05-20

Applicant: QUALCOMM Incorporated

Inventor： Rajiv LAROIA ,  Junyi LI ,  Sathyadev Venkata UPPALA

IPC: H04L5/00 ,  H04L27/26 ,  H04L5/02

Abstract: A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

公开(公告)号：US20190159085A1

公开(公告)日：2019-05-23

申请号：US16255655

申请日：2019-01-23

Applicant: QUALCOMM Incorporated

Inventor： Samir KAPOOR ,  Junyi LI ,  Rajiv LAROIA

IPC: H04W36/06 ,  H04L5/14 ,  H04W72/02

Abstract: Transmission techniques using configurable channels for the downlink and/or uplink are described. In one aspect, the downlink channel and/or uplink channel may be independently selected for a terminal. The terminal may establish a connection with a base station on default downlink and uplink channels. Another downlink channel and/or another uplink channel may be selected based on various factors such as channel quality, loading, and interference. The terminal would then switch to the new downlink and/or uplink channel for communication. In another aspect, the base stations broadcast sector information used by the terminals for communication and/or channel selection. The sector information may include various types of information such as the available downlink and uplink channels, the frequencies of the available channels, the loading on the available channels, and QoS information. The terminals may select a sector, a downlink channel, and/or an uplink channel based on the sector information

公开(公告)号：US20180310266A1

公开(公告)日：2018-10-25

申请号：US16025802

申请日：2018-07-02

Applicant: QUALCOMM Incorporated

Inventor： Junyi LI ,  Rajiv LAROIA ,  Mathew CORSON

IPC: H04W56/00 ,  H04W36/18 ,  H04W52/40 ,  H04W52/02 ,  H04W88/02

CPC classification number: H04W56/001 ,  H04W36/18 ,  H04W52/0203 ,  H04W52/0212 ,  H04W52/0245 ,  H04W52/40 ,  H04W56/00 ,  H04W88/02 ,  Y02D70/00 ,  Y02D70/20

Abstract: Methods and apparatus which allow a wireless terminal (302) to simultaneously maintain connections with multiple base stations (304, 306) are described. Each wireless terminal (302) is capable of supporting multiple separate timing and/or other control loops one, for each base station connection thereby allowing the connections to operate independently and in parallel. Different control signals and/or data are transmitted on each connection that is established with a base station (302, 306). In this manner base stations (302, 306) receive different data allowing for asynchronous data transmission. The data received by the base stations (302, 306) can be supplied to a wired asynchronous network (308) without the need to combine the received data prior to supplying it to the wired network (308). The communications techniques of the invention can be used to implement soft handoffs without the need to duplicate data transmissions to multiple base stations.

公开(公告)号：US20180069846A1

公开(公告)日：2018-03-08

申请号：US15813101

申请日：2017-11-14

Applicant: QUALCOMM Incorporated

Inventor： Vincent Douglas PARK ,  Rajiv LAROIA ,  Junyi LI

IPC: H04L29/06 ,  H04L9/08 ,  H04W12/04 ,  H04W8/26 ,  H04W48/08 ,  H04W92/18 ,  H04W8/00

CPC classification number: H04L63/061 ,  H04L9/0866 ,  H04L9/0872 ,  H04L63/0846 ,  H04L63/0876 ,  H04W8/005 ,  H04W8/26 ,  H04W12/04 ,  H04W48/08 ,  H04W92/18

Abstract: In an ad hoc peer-to-peer type network during peer discovery, information relating to users of various devices is broadcast to other devices in the network, which can compromise privacy of the users. Instead of announcing a public identifier that might be known by a multitude of individuals, the user device announces a private identifier that might be known to, or determined by, a select few individuals. The individuals selected can be given a key to determine the private identifier associated with a public identifier, or vice versa, wherein that key can have a validity range or a period of time, after which the key expires. Prior to the expiration of the key, the selected individuals, through their respective devices, can detect a corresponding user and/or device by the current private identifier being announced, thus mitigating the number of people that are aware of the user's presence.

公开(公告)号：US20130150055A1

公开(公告)日：2013-06-13

申请号：US13764230

申请日：2013-02-11

Applicant: QUALCOMM Incorporated

Inventor： Rajiv LAROIA ,  Junyi LI ,  Sathyadev Venkata UPPALA

IPC: H04W36/20

CPC classification number: H04W36/20 ,  H04W16/12 ,  H04W16/14 ,  H04W24/00 ,  H04W36/06 ,  H04W52/0235 ,  H04W52/08 ,  H04W52/281 ,  H04W52/283 ,  H04W52/286 ,  H04W52/287 ,  H04W52/288 ,  H04W52/60 ,  H04W56/00 ,  H04W68/02 ,  H04W68/025 ,  H04W72/00 ,  H04W72/048 ,  Y02D70/00

Abstract: In many cellular systems, reusing spectrum bandwidth, creates problems in boundary regions between the cells and sectors where the signal strength received from adjacent base stations or adjacent sector transmissions of a single base station may be nearly equivalent. The invention creates a new type of diversity, referred to as multiple carrier diversity by utilizing multiple carriers, assigning different power levels to each carrier frequency at each base station, and/or offsetting sector antennas. The cell and/or sector coverage areas can be set so as to minimize or eliminate overlap between cell and/or sector boundary regions of different carrier frequencies. Mobile nodes traveling throughout the system can exploit multiple carrier diversity by detecting carriers and selecting to use a non-boundary carrier based on other system criteria in order to improve performance. Boundary carriers may, but need not be, identified and excluded from consideration for use by a wireless terminal.

Abstract translation: 在许多蜂窝系统中，重用频谱带宽在小区和扇区之间的边界区域中产生问题，其中从相邻基站接收的信号强度或单个基站的相邻扇区传输可能几乎相等。 本发明通过利用多个载波，在每个基站上为每个载波频率分配不同的功率电平和/或补偿扇区天线来创建一种称为多载波分集的新型分集。 可以设置小区和/或扇区覆盖区域以便最小化或消除不同载波频率的小区和/或扇区边界区域之间的重叠。 在整个系统中传播的移动节点可以通过检测载波并且基于其他系统标准选择使用非边界载波来利用多载波分集，以便提高性能。 边界运营商可以但不需要被识别并排除在考虑无线终端的使用之外。