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    Radio frequency communication network having adaptive communication parameters
    221.
    发明申请
    Radio frequency communication network having adaptive communication parameters 失效
    具有自适应通信参数的射频通信网络

    公开(公告)号：US20030174764A1

    公开(公告)日：2003-09-18

    申请号：US10360591

    申请日：2003-02-06

    Inventor： Ronald L. Mahany

    IPC: H04B001/38 ,  H04L005/16

    CPC classification number: H04L1/0001 ,  H04B1/69 ,  H04B1/707 ,  H04B1/713 ,  H04B17/0085 ,  H04B17/318 ,  H04B2201/7071 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0014 ,  H04L1/0025 ,  H04L1/0071 ,  H04L1/0075 ,  H04L29/06 ,  H04L69/24 ,  H04W28/06 ,  H04W28/065 ,  H04W28/18

    Abstract: Improved apparatus for a radio communication network having a multiplicity of mobile transceiver units selectively in communication with a plurality of base transceiver units which communicate with one or two host computers for storage and manipulation of data collected by bar code scanners or other collection means associated with the mobile transceiver units. The radio network is adaptive in that in order to compensate for the wide range of operating conditions a set of variable network parameters are exchanged between transceivers in the network. These parameters define optimized communication on the network under current network conditions. Examples of such parameters include: the length and frequency of the spreading code in direct-sequence spread spectrum communications; the hop frame length, coding, and interleaving in frequency-hopping spread spectrum communications; the method of source encoding used; and the data packet size in a network using data segmentation. The invention is preferably to be applicable as an upgrade of an existing data capture system wherein a large number of hand-held transceiver units operate over an extensive area to gather data in various places, requiring the use of multiple base stations. In a variety of such installations such as warehouse facilities, distribution centers, and retail establishments, it may be advantageous to utilize not only multiple bases capable of communication with a single host, but with multiple hosts as well.

    Abstract translation: 一种用于无线电通信网络的改进装置，其具有选择性地与多个基站收发器单元通信的多个移动收发机单元，所述多个基站收发器单元与一个或两个主计算机通信，用于存储和操纵由条形码扫描器或与其相关联的其他收集装置收集的数据 移动收发单元。 无线网络是适应性的，为了补偿广泛的操作条件，在网络中的收发器之间交换一组可变网络参数。 这些参数定义了当前网络条件下网络上的优化通信。 这些参数的示例包括：直接序列扩频通信中的扩展码的长度和频率; 跳频扩频通信中的跳帧长度，编码和交织; 使用源编码的方法; 以及使用数据分段的网络中的数据分组大小。 本发明优选地适用于现有数据采集系统的升级，其中大量手持式收发器单元在广泛的区域上操作以在需要使用多个基站的各个地方收集数据。 在诸如仓库设施，配送中心和零售机构的各种这样的安装中，可能有利的是不仅利用能够与单个主机通信的多个基站，而且利用多个主机。

    Steps one and three W-CDMA and multi-mode searching
    222.
    发明申请
    Steps one and three W-CDMA and multi-mode searching 有权
    第一步和第三步W-CDMA和多模式搜索

    公开(公告)号：US20030147365A1

    公开(公告)日：2003-08-07

    申请号：US10160874

    申请日：2002-05-31

    Inventor： Daisuke Terasawa ,  Deepu John ,  Hao Liu ,  Qiuzhen (Joe) Zou ,  Sivarama Krishnan Venkatesan

    IPC: H04B007/216

    CPC classification number: H04B1/70735 ,  H04B2201/70707 ,  H04B2201/7071

    Abstract: Techniques for efficient searching in asynchronous systems, such as W-CDMA, as well as multi-mode searching, are disclosed. In one aspect, step one and step three search are performed in a single search engine. In another aspect, a search engine is configurable to search the offsets of a slot in step one search, producing sequential hypothesis energies, and peak detecting and sorting those energies. In yet another aspect, the peak detector and sorter are configurable to perform step one searching or step three/multimode searching. Various other aspects of the invention are also presented. These aspects have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.

    Abstract translation: 公开了用于在诸如W-CDMA的异步系统中进行有效搜索的技术以及多模式搜索。 在一个方面，在单个搜索引擎中执行步骤1和步骤3搜索。 在另一方面，搜索引擎可配置为在步骤一搜索中搜索时隙的偏移量，产生顺序假设能量，以及峰值检测和排序这些能量。 在另一方面，峰值检测器和分类器可配置为执行步骤一搜索或步骤三/多模式搜索。 还提出了本发明的各种其它方面。 这些方面具有电路面积和搜索时间效率的优点，从而降低了成本，增加了待机时间，提高了采集速度，提高了信号传输质量，提高了数据吞吐量，降低了功耗，提高了整体系统容量。

    Methods and apparatus for spread spectrum signal processing using a reconfigurable coprocessor
    224.
    发明申请
    Methods and apparatus for spread spectrum signal processing using a reconfigurable coprocessor 有权
    使用可重配置协处理器的扩频信号处理方法和装置

    公开(公告)号：US20030095531A1

    公开(公告)日：2003-05-22

    申请号：US10300055

    申请日：2002-11-20

    Applicant: Analog Devices, Inc.

    Inventor： Joern Soerensen ,  Palle Birk ,  Zoran Zvonar

    IPC: H04B007/216

    CPC classification number: H04B1/7115 ,  H04B2201/7071

    Abstract: Methods and apparatus are provided for spread spectrum signal processing in a wireless communication system. The apparatus includes a control processor to generate commands for processing spread spectrum signal components and a reconfigurable coprocessor to process the spread spectrum signal components based on the commands and to provide reports to the control processor based on results of processing the signal components.

    Abstract translation: 在无线通信系统中提供用于扩频信号处理的方法和装置。 该装置包括：控制处理器，用于产生用于处理扩展频谱信号分量的命令;以及可重构协处理器，用于基于该命令处理扩频信号分量，并根据处理信号分量的结果向控制处理器提供报告。

    Rake finger receiver and method therefor in a spread spectrum communication system
    225.
    发明申请
    Rake finger receiver and method therefor in a spread spectrum communication system 失效
    耙指接收机及其方法在扩频通信系统中

    公开(公告)号：US20030095530A1

    公开(公告)日：2003-05-22

    申请号：US10285435

    申请日：2002-11-01

    Inventor： Che-Li Lin

    IPC: H04B007/216

    CPC classification number: H04B1/7085 ,  H04B1/7117 ,  H04B2201/7071

    Abstract: A rake finger receiver and control method therefor, for use in a wireless spread communication system. The rake finger receiver includes a multiplexer, a searcher, a first switch fabric, a rake fingers and tracking pool, a second switch fabric, a combiner, a decoder, a channel estimator, and a rake finger controller. One searcher is used to serve multiple antennas of a base station so as to reduce the system complexity. The number of the rake fingers assigned for processing multipath components associated with a radio link is determined dynamically. Thus, the resource is utilized efficiently.

    Abstract translation: 一种用于无线传播通信系统的耙指接收机及其控制方法。 耙指接收器包括多路复用器，搜索器，第一交换结构，耙指和跟踪池，第二交换结构，组合器，解码器，信道估计器和耙指控制器。 一个搜索器用于服务于基站的多个天线，以便降低系统的复杂度。 分配用于处理与无线电链路相关联的多路径分量的耙指的数量被动态地确定。 因此，资源被有效利用。

    Remote radio data communication system with data rate switching
    226.
    发明申请
    Remote radio data communication system with data rate switching 失效
    具有数据速率切换的远程无线电数据通信系统

    公开(公告)号：US20030078006A1

    公开(公告)日：2003-04-24

    申请号：US10057816

    申请日：2002-01-24

    Inventor： Ronald L. Mahany

    IPC: H04Q007/20 ,  H04B015/00

    CPC classification number: H04W52/343 ,  G06F1/163 ,  G06F1/1632 ,  G06K7/10722 ,  G06K7/10881 ,  G06K7/1093 ,  G06K7/1098 ,  G06K17/0022 ,  G06Q10/08 ,  G06Q20/343 ,  G07F7/02 ,  G07G1/0045 ,  G08C17/02 ,  G08C2201/20 ,  H01Q1/22 ,  H02J9/005 ,  H04B1/3883 ,  H04B1/69 ,  H04B1/707 ,  H04B1/713 ,  H04B17/0085 ,  H04B17/309 ,  H04B17/318 ,  H04B2001/3894 ,  H04B2201/7071 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0014 ,  H04L1/0025 ,  H04L1/0032 ,  H04L29/06 ,  H04L69/18 ,  H04L69/24 ,  H04W52/029 ,  Y02D70/26 ,  Y02D70/40

    Abstract: In an exemplary communication system, a multiplicity of mobile terminals are to share a communication link with a host processor communicating through base transceivers. The mobile terminals evaluate communication signals being transmitted to one or more of the mobile transceivers and according to the evaluation of such signals, each mobile terminal independently selects a relatively high data rate or a lower more conservative data rate for communication with the host processor. The mobile terminal enters a dormant state after a fixed period elapses during which the mobile unit is not engaged in communication with the base station. Periodically, the mobile terminal reenters active state in receive mode for a brief interval and if no polling signal or other message directed to the mobile terminal is present, the mobile terminal returns to dormant state. When a signal is directed to the mobile terminal, the mobile terminal remains in active receive mode until a fixed period after a communication session is completed and then returns to dormant/active cycling. A base station utilizing a dormant polling protocol transmits polling sequences to a plurality of remote transceivers during periods of heavy loading. During periods of low loading, the base station stops polling and enters into a dormant state, listening for communication request from the remote transceivers. Upon receiving such a request, the base station immediately responds by servicing the requesting remote transceiver. In this way, the base station provides optimized utilization of the communication channel during periods of heavy and light loading conditions.

    Abstract translation: 在示例性通信系统中，多个移动终端将与通过基站收发器通信的主处理器共享通信链路。 移动终端评估正在发送到一个或多个移动收发机的通信信号，并且根据对这些信号的评估，每个移动终端独立地选择相对较高的数据速率或较低的较保守的数据速率以与主机处理器进行通信。 在移动单元未与基站进行通信的固定时间段之后，移动终端进入休眠状态。 周期性地，移动终端以接收模式重新进入活动状态短暂的时间间隔，并且如果没有轮询信号或指向移动终端的其他消息存在，则移动终端返回休眠状态。 当信号被引导到移动终端时，移动终端保持在主动接收模式，直到通信会话完成之后的固定时间段，然后返回到休眠/主动循环。 利用休眠轮询协议的基站在重负载期间向多个远程收发器发送轮询序列。 在低负载期间，基站停止轮询并进入休眠状态，监听来自远程收发器的通信请求。 在接收到这样的请求时，基站通过服务请求的远程收发器立即进行响应。 以这种方式，基站在重载和轻载条件期间提供通信信道的优化利用。

    Method of controlling initial power ramp-up in CDMA systems by using short codes
    228.
    发明授权
    Method of controlling initial power ramp-up in CDMA systems by using short codes 有权
    通过使用短码来控制CDMA系统初始功率提升的方法

    公开(公告)号：US06493563B1

    公开(公告)日：2002-12-10

    申请号：US09721034

    申请日：2000-11-22

    Applicant: Fatih M. Ozluturk ,  Gary R. Lomp

    Inventor： Fatih M. Ozluturk ,  Gary R. Lomp

    IPC: H04Q720

    CPC classification number: H04W52/36 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B7/2628 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/7071 ,  H04W52/367 ,  H04W52/50 ,  H04W52/60

    Abstract: A system and method of controlling transmission power during the establishment of a channel in a CDMA communication system utilize the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional spreading code. The ramp-up starts from a power level that is guaranteed to be lower than the required power level for detection by the base station. The subscriber unit quickly increases transmission power while repeatedly transmitting the short code until the signal is detected by the base station. Once the base station detects the short code, it sends an indication to the subscriber unit to cease increasing transmission power. The use of short codes limits power overshoot and interference to other subscriber stations and permits the base station to quickly synchronize to the spreading code used by the subscriber unit.

    Abstract translation: 在CDMA通信系统建立信道期间控制发射功率的系统和方法利用在初始功率提升期间从用户单元向基站传输短码。 短码是用于基站检测的序列，其具有比常规扩展码短得多的周期。 斜坡上升从功率电平开始，该功率电平保证低于基站检测所需的功率电平。 用户单元快速增加发射功率，同时重复发送短码直到基站检测到信号。 一旦基站检测到短码，它就向用户单元发送指示，以停止增加发射功率。 使用短码限制了对其他用户站的功率过冲和干扰，并允许基站快速同步到用户单元使用的扩展码。

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