公开(公告)号：US6160999A

公开(公告)日：2000-12-12

申请号：US937305

申请日：1997-08-18

申请人： Ashvin H. Chheda ,  Ahmad Jalali

发明人： Ashvin H. Chheda ,  Ahmad Jalali

IPC分类号： H04B7/005 ,  H04W36/18 ,  H04W52/40 ,  H04B1/00

CPC分类号： H04W52/40 ,  H04W36/18

摘要： A wireless communication system facilitates wireless communication with a mobile unit operating within a respective service area. The wireless communication system includes a mobile switching center and a plurality of base stations with each base stations coupled to the mobile switching center and providing wireless coverage within a respective portion of the service area. The mobile unit wirelessly connects to at least two of the base stations (or sectors of the base stations) that transmit to the mobile unit via respective forward links at respective transmit levels. These respective transmit levels are based upon forward link requirements of the mobile unit. The mobile unit transmits to the at least two base stations/sectors via a respective plurality of reverse links. Forward link transmit levels may be determined based upon the quality of corresponding reverse link transmissions or from the quality of pilot signals or forward link transmissions received by the mobile unit. Forward link transmissions are made via the most favorable forward links (at least one) while transmissions are not made, or are made at reduced power levels on the least favorable forward links. During management of the wireless communication system, forward link transmissions are initiated and discontinued based upon the forward link transmission power requirements of the mobile unit. While managing the forward link transmissions, the forward link transmission power requirements of the mobile unit may be compared to a plurality of thresholds. When these thresholds are exceeded, the management requires altering which base stations make forward link transmissions and at what levels such transmissions are made. In a particular embodiment of the wireless communication system, the system operates according to a code division multiple access protocol.

摘要翻译： 无线通信系统促进与在相应服务区域内操作的移动单元的无线通信。 无线通信系统包括移动交换中心和多个基站，每个基站耦合到移动交换中心，并在服务区域的相应部分内提供无线覆盖。 移动单元通过相应的发送电平的各自的前向链路与至少两个基站（或基站的扇区）无线地连接。 这些各自的传输级别基于移动单元的前向链路要求。 移动单元经由相应的多个反向链路向至少两个基站/扇区发送。 可以基于对应的反向链路传输的质量或由移动单元接收的导频信号或前向链路传输的质量来确定前向链路传输级别。 通过最不利的前向链路（至少一个）进行前向链路传输，而不进行传输，或者在最不利的前向链路上以较低的功率级别进行传输。 在无线通信系统的管理期间，基于移动单元的前向链路发送功率需求，发起和中断前向链路传输。 在管理前向链路传输时，可以将移动单元的前向链路传输功率要求与多个阈值进行比较。 当超过这些阈值时，管理需要改变哪些基站进行前向链路传输，并且在什么级别进行这样的传输。 在无线通信系统的特定实施例中，系统根据码分多址协议进行操作。

公开(公告)号：US6038448A

公开(公告)日：2000-03-14

申请号：US899105

申请日：1997-07-23

申请人： Ashvin H. Chheda ,  Ahmad Jalali

发明人： Ashvin H. Chheda ,  Ahmad Jalali

IPC分类号： H04W16/24 ,  H04W36/30 ,  H04B7/20

CPC分类号： H04W36/30 ,  H04W16/24

摘要： A wireless communication system facilitates wireless communication with a mobile unit within a respective service area. The wireless communication system includes a mobile switching center and a plurality of base stations. Each base station couples to the mobile switching center and provides wireless communication within a respective cell or within a plurality of respective sectors. Each base station provides a pilot signal that may be received by the wireless mobile unit. With multiple sectors, a pilot signal is provided for each sector. The mobile unit may wirelessly connect to any of the base stations' cells and sectors. A determination of whether to be connected to a particular base station cell and/or base station sector is based upon the relative strengths of pilot signals received by the wireless mobile unit. The mobile unit may evaluate the relative strengths of received pilot signals and simply request a connection to a base station or a disconnection therefrom based upon the evaluation. However, the mobile unit may also notify the mobile switching center of strengths of received pilot signals with the mobile switching center taking action. In such case, the mobile switching center may determine thresholds and pass the thresholds to the mobile unit for later use, the thresholds based upon the relative strengths of the pilot signals. A corresponding method includes steps for operating a wireless communication system.

摘要翻译： 无线通信系统促进与相应服务区域内的移动单元的无线通信。 无线通信系统包括移动交换中心和多个基站。 每个基站耦合到移动交换中心，并在相应小区内或多个相应扇区内提供无线通信。 每个基站提供可由无线移动单元接收的导频信号。 对于多个扇区，为每个扇区提供导频信号。 移动单元可以无线地连接到任何基站的小区和扇区。 是否连接到特定基站小区和/或基站扇区的确定是基于由无线移动单元接收的导频信号的相对强度。 移动单元可以评估所接收的导频信号的相对强度，并且基于该评估简单地请求到基站的连接或其断开连接。 然而，移动单元还可以通过移动交换中心采取行动来通知移动交换中心接收到的导频信号的强度。 在这种情况下，移动交换中心可以确定阈值并将阈值传递给移动单元供以后使用，该阈值基于导频信号的相对强度。 相应的方法包括用于操作无线通信系统的步骤。

公开(公告)号：US20210392558A1

公开(公告)日：2021-12-16

申请号：US16900572

申请日：2020-06-12

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04W36/30 ,  H04L5/00 ,  H04W24/08 ,  H04L1/18

摘要： A User Equipment (UE) measures the signal quality of a dedicated downlink reference signal transmitted by a Base Station (BS) to the UE. If the signal quality is below a threshold, the UE initiates a measurement procedure to determine a target handover BS. The UE sequentially transmits an uplink reference signal on each of UE's beams. The BSs estimate the Angle of Arrival (AoA) of any received uplink reference signal, form a dedicated downlink beam pointed toward the AoA and transmit an acknowledgment to the UE on the corresponding beam. The UE estimates the signal quality of the received acknowledgements on the different UE beams, and transmits a handover message on the UE beam on which the acknowledgement with the highest signal quality is received. The uplink reference signal may comprise of a single preamble. The acknowledgement may comprise of a preamble, or a preamble followed by a small payload.

公开(公告)号：US10389431B2

公开(公告)日：2019-08-20

申请号：US16205641

申请日：2018-11-30

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04B7/212 ,  H04B7/185 ,  H04L27/36 ,  H04W72/04 ,  H04W72/08 ,  H04W16/28 ,  H04W84/00

摘要： An air interface for a terrestrial communications network for providing broadband internet access to aerial platforms is described. In some embodiments, systems and methods are described for efficient retransmission of data packets that are not received correctly. In other embodiments, systems and methods are described for determining the modulation constellation and error correction code rate used in transmitting a data packet to maximize data rates. In another set of embodiments, the retransmission scheme and modulation constellation and error correction code rate determination are jointly optimized to maximize data rates.

公开(公告)号：US09807569B2

公开(公告)日：2017-10-31

申请号：US14533756

申请日：2014-11-05

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04W24/00 ,  H04W4/04 ,  G01S5/02 ,  G06Q10/08 ,  G01S5/14 ,  G01S13/87 ,  H04B7/185 ,  H04W64/00

CPC分类号： H04W4/046 ,  G01S5/02 ,  G01S5/14 ,  G01S13/876 ,  G06Q10/0833 ,  H04B7/18502 ,  H04W64/003

摘要： An automated method of determining a location of an aerial platform is described. The method includes: transmitting, from the aerial platform, a first pilot signal; receiving, at a set of ground devices, the first pilot signal; determining a first set of values based on measurements associated with the first pilot signal; and calculating a position of the aerial platform based at least partly on the first set of values. An automated method adapted to determine a location of a ground device includes: transmitting, from the ground device, a first pilot signal; receiving, at each aerial platform in a set of aerial platforms, the first pilot signal; determining a first set of values based on measurements associated with the first pilot signal; and calculating a position of the ground device based at least partly on the first set of values. A system adapted to provide location information is described.

公开(公告)号：US09742484B2

公开(公告)日：2017-08-22

申请号：US14284079

申请日：2014-05-21

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04B7/185 ,  H04W36/30 ,  B64C39/02 ,  H04W84/06 ,  H04W24/02 ,  H04W48/16 ,  H04W88/16 ,  H04W84/00

CPC分类号： H04B7/18504 ,  B64C39/024 ,  B64C2201/122 ,  H04B7/1555 ,  H04B7/18506 ,  H04B7/18528 ,  H04B7/18539 ,  H04B7/18541 ,  H04B7/18543 ,  H04B7/18554 ,  H04B7/18578 ,  H04W24/02 ,  H04W36/0005 ,  H04W36/0016 ,  H04W36/0083 ,  H04W36/12 ,  H04W36/30 ,  H04W36/36 ,  H04W48/16 ,  H04W84/005 ,  H04W84/06 ,  H04W88/16 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/164 ,  Y02D70/446

摘要： Systems and methods are described that use the downlink and uplink frequency bands of the fixed satellite service (FSS) and direct broadcast service (DBS) systems to provide broadband access to aerial platforms including aircraft, drones, and unmanned aerial vehicles (UAVs) such as balloons. The secondary service aerial platform transmitters are configured to avoid interference into the primary satellite service receivers. The aerial platform may be able to detect and connect to the cell site with the strongest signal. The aerial platform may be able to handoff from one cell site to another. Systems and methods are described that provide broadband access to ground terminal via aerial platforms such as drones and UAVs such as balloons.

公开(公告)号：US09385803B2

公开(公告)日：2016-07-05

申请号：US14228640

申请日：2014-03-28

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04B7/185 ,  H04W40/22 ,  H04W84/06

CPC分类号： H04B7/18506 ,  H04B7/10 ,  H04W28/0226 ,  H04W28/0231 ,  H04W36/08 ,  H04W40/22 ,  H04W84/06

摘要： An air to ground (ATG) broadband access system is described. The system includes: a plurality of cell sites that together form a service coverage area, each cell site adapted to generate a local coverage area, each sell site including: multiple antenna fixtures situated at a lower corner of the local coverage area, where the local coverage area includes multiple sectors and each antenna fixture is associated with a different sector than each other antenna fixture; and a radio sub-system connected to each antenna fixture, the radio sub-system including a transmitter capable of modulating and transmitting signals through the antenna fixture and a receiver capable of demodulating and decoding signals received through the antenna fixture; and at least one aerial platform including: at least one antenna fixture capable of forming beams toward the cell site; and a radio sub-system capable of modulating and transmitting signals and demodulating and decoding signals.

摘要翻译： 描述了空对地（ATG）宽带接入系统。 该系统包括：多个小区站点，其一起形成服务覆盖区域，每个小区站点适于生成本地覆盖区域，每个销售站点包括：位于本地覆盖区域的下角的多个天线固定装置，其中本地 覆盖区域包括多个扇区，并且每个天线固定装置与彼此天线固定装置的不同扇区相关联; 以及连接到每个天线固定装置的无线电子系统，所述无线电子系统包括能够通过天线装置调制和发送信号的发射机和能够解调和解码通过天线固定装置接收的信号的接收机; 以及至少一个空中平台，包括：至少一个天线固定装置，其能够朝向所述小区站点形成波束; 以及能够调制和发送信号以及解调和解码信号的无线电子系统。

公开(公告)号：US20150237569A1

公开(公告)日：2015-08-20

申请号：US14609207

申请日：2015-01-29

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04W48/16 ,  B64C39/02

CPC分类号： H04B7/18504 ,  B64C39/024 ,  B64C2201/122 ,  H04B7/1555 ,  H04B7/18506 ,  H04B7/18528 ,  H04B7/18539 ,  H04B7/18541 ,  H04B7/18543 ,  H04B7/18554 ,  H04B7/18578 ,  H04W24/02 ,  H04W36/0005 ,  H04W36/0016 ,  H04W36/0083 ,  H04W36/12 ,  H04W36/30 ,  H04W36/36 ,  H04W48/16 ,  H04W84/005 ,  H04W84/06 ,  H04W88/16 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/164 ,  Y02D70/446

摘要： A communication system is described. The system includes: at least one gateway able to provide broadband connectivity, a set of ground terminals, and a set of aerial platforms, where at least one aerial platform is able to communicate with at least one gateway using radio frequencies, each aerial platform is able to communicate with ground terminals using radio frequencies, and each aerial platform is able to communicate with each other aerial platform using radio frequencies. An automated method for determining a beam direction for communication among UAVs includes: dividing a space around the UAV into multiple sub-regions, and, iteratively: selecting a sub-region from among the multiple sub-regions; pointing a signal toward the sub-region; and determining whether a signal is received from another UAV, until all sub-regions from among the multiple sub-regions have been selected.

摘要翻译： 描述通信系统。 该系统包括：能够提供宽带连接的至少一个网关，一组接地终端和一组高空作业平台，其中至少一个空中平台能够使用无线电频率与至少一个网关通信，每个空中平台是 能够使用无线电频率与地面终端通信，并且每个空中平台能够使用无线电频率与彼此的空中平台通信。 用于确定UAV之间的通信的波束方向的自动化方法包括：将UAV周围的空间划分成多个子区域，并且迭代地：从多个子区域中选择子区域; 指向子区域的信号; 以及确定是否从另一UAV接收到信号，直到所述多个子区域中的所有子区域被选择为止。

公开(公告)号：US20150236780A1

公开(公告)日：2015-08-20

申请号：US14284079

申请日：2014-05-21

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04B7/185

CPC分类号： H04B7/18504 ,  B64C39/024 ,  B64C2201/122 ,  H04B7/1555 ,  H04B7/18506 ,  H04B7/18528 ,  H04B7/18539 ,  H04B7/18541 ,  H04B7/18543 ,  H04B7/18554 ,  H04B7/18578 ,  H04W24/02 ,  H04W36/0005 ,  H04W36/0016 ,  H04W36/0083 ,  H04W36/12 ,  H04W36/30 ,  H04W36/36 ,  H04W48/16 ,  H04W84/005 ,  H04W84/06 ,  H04W88/16 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/164 ,  Y02D70/446

摘要： Systems and methods are described that use the downlink and uplink frequency bands of the fixed satellite service (FSS) and direct broadcast service (DBS) systems to provide broadband access to aerial platforms including aircraft, drones, and unmanned aerial vehicles (UAVs) such as balloons. The secondary service aerial platform transmitters are configured to avoid interference into the primary satellite service receivers. The aerial platform may be able to detect and connect to the cell site with the strongest signal. The aerial platform may be able to handoff from one cell site to another. Systems and methods are described that provide broadband access to ground terminal via aerial platforms such as drones and UAVs such as balloons.

摘要翻译： 描述了使用固定卫星服务（FSS）和直接广播服务（DBS）系统的下行链路和上行链路频带来提供对包括飞机，无人机和无人机（UAV）在内的空中平台的宽带接入的系统和方法，例如 气球 二级服务空中平台发射机被配置为避免干扰到主卫星接收机。 空中平台可能能够以最强的信号检测并连接到小区站点。 空中平台可能能够从一个小区站点切换到另一个小区站点。 描述了通过空中平台（例如无人机和无人机例如气球）向接地终端提供宽带接入的系统和方法。

公开(公告)号：US08699465B2

公开(公告)日：2014-04-15

申请号：US12627974

申请日：2009-11-30

申请人： Bin Tian ,  Ahmad Jalali ,  Srikant Jayaraman ,  June Namgoong

发明人： Bin Tian ,  Ahmad Jalali ,  Srikant Jayaraman ,  June Namgoong

IPC分类号： H04W36/30 ,  H04W84/08 ,  H04W74/04

CPC分类号： H04B7/18543 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/08 ,  Y02D50/10

摘要： In a synchronous application to control forward link (FL) data rates in a satellite system, user equipment (UE) repeatedly transmits a quality control measurement (QCM) index during a QCM period. During this QCM period, the data rate cannot change. The associated satellite transmits at a new rate corresponding to the QCM index. The UE knows that it will begin receiving new data at the new rate after a QCM delay. In an asynchronous application, a satellite transmits a rate change signal over a FL rate indication channel (RICH). A UE monitors the FL RICH for this signal. When the signal quality is to be low, the satellite sends only a single bit of the QCM index over a first orthogonal channel. When the signal quality is not low, the satellite transmits each bit of the QCM index in a separate orthogonal channel of the FL RICH.

摘要翻译： 在用于在卫星系统中控制前向链路（FL）数据速率的同步应用中，用户设备（UE）在QCM周期期间重复发送质量控制测量（QCM）索引。 在这个QCM期间，数据速率不能改变。 相关联的卫星以对应于QCM指数的新速率发射。 UE知道在QCM延迟之后，它将以新的速率开始接收新的数据。 在异步应用中，卫星通过FL速率指示信道（RICH）发送速率改变信号。 UE监视该信号的FL RICH。 当信号质量低时，卫星在第一个正交信道上只发送一个QCM索引的比特。 当信号质量不低时，卫星在FL RICH的单独的正交信道中发送QCM索引的每个比特。