利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

158 条记录 (耗时 0.028 秒)

    Wireless communication system providing improved forward link management and method of operation
    1.
    发明授权
    Wireless communication system providing improved forward link management and method of operation 失效
    无线通信系统提供改进的前向链路管理和操作方法

    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。

    Wireless communication system having hand-off based upon relative pilot signal strengths
    2.
    发明授权
    Wireless communication system having hand-off based upon relative pilot signal strengths 失效
    基于相对导频信号强度的无线通信系统具有切换功能

    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。

    SYSTEMS AND METHODS FOR A WIRELESS BROADBAND ACCESS SYSTEM
    3.
    发明公开
    SYSTEMS AND METHODS FOR A WIRELESS BROADBAND ACCESS SYSTEM 审中-公开

    公开(公告)号：US20240236963A9

    公开(公告)日：2024-07-11

    申请号：US18383224

    申请日：2023-10-24

    申请人： Ahmad Jalali

    发明人： Ahmad Jalali

    IPC分类号： H04W72/0453 ,  H04W72/541

    CPC分类号： H04W72/0453 ,  H04W72/541

    摘要： A communications apparatus comprises of one or more Active Antenna Units (AAUs) collocated in the same sector, and a processor. The processor de-multiplexes a data packet stream into at least two sub-streams, each sub-stream is transmitted on a different medium path. Each medium path is comprised of frequency channels, antenna polarizations and AAUs. A scheduler assigns data packets to different medium paths. The apparatus transmits on at least one frequency band, each frequency band is divided into a set of one or more frequency channels, at least one frequency channel of a frequency band is assigned to at least one AAU. A frequency channel is assigned to only one or to both antenna polarizations of the same AAU. The apparatus determines if an extraneous signal is present on a frequency channel and stops transmitting on the entire or part of the frequency channel where extraneous signal is detected.

    SIGNALING AND PROCEDURES FOR FAST AND LOW OVERHEAD HANDOVER FOR MU MIMO SYSTEMS
    4.
    发明申请
    SIGNALING AND PROCEDURES FOR FAST AND LOW OVERHEAD HANDOVER FOR MU MIMO SYSTEMS 有权

    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.

    Air interface protocols for broadband access to aerial platforms
    5.
    发明授权
    Air interface protocols for broadband access to aerial platforms 有权

    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.

    Location based services provided via unmanned aerial vehicles (UAVs)
    6.
    发明授权
    Location based services provided via unmanned aerial vehicles (UAVs) 有权

    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.

    Provision of broadband access to airborne platforms
    8.
    发明授权
    Provision of broadband access to airborne platforms 有权
    提供宽带接入机载平台

    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。

    Unmanned Aerial Vehicle Communication Using Distributed Antenna Placement and Beam Pointing
    9.
    发明申请
    Unmanned Aerial Vehicle Communication Using Distributed Antenna Placement and Beam Pointing 审中-公开
    使用分布式天线放置和光束指向的无人飞行器通信

    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。