公开(公告)号：US20060088134A1

公开(公告)日：2006-04-27

申请号：US11297264

申请日：2005-12-07

申请人： Klein Gilhousen ,  Irwin Jacobs ,  Roberto Padovani ,  Lindsay Weaver ,  Charles Wheatley ,  Andrew Viterbi

发明人： Klein Gilhousen ,  Irwin Jacobs ,  Roberto Padovani ,  Lindsay Weaver ,  Charles Wheatley ,  Andrew Viterbi

IPC分类号： H04B1/707 ,  H04L27/08

CPC分类号： H04L1/0002 ,  H04B1/707 ,  H04B1/70757 ,  H04B1/7115 ,  H04B7/2618 ,  H04B7/2628 ,  H04B7/2637 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J3/02 ,  H04J3/1688 ,  H04J3/22 ,  H04J13/0022 ,  H04J13/0048 ,  H04J13/12 ,  H04L1/0071 ,  H04L1/0072 ,  H04L1/06 ,  H04L1/08 ,  H04L5/02 ,  H04L5/12 ,  H04L23/02 ,  H04W52/08 ,  H04W52/10 ,  H04W52/26

摘要： A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the exemplary embodiment, transmit power of mobile unit signals is controlled based on signal power received by the mobile unit and power adjustment commands sent to the mobile unit.

摘要翻译： 一种使用扩频通信技术传送信息信号的系统和方法。 构造PN序列，以提供用户之间的正交性，从而减少相互干扰，从而允许更高的容量和更好的链路性能。 对于正交PN码，在相关的时间间隔内，互相关为0，导致正交码之间没有干扰，只要码时间帧彼此时间对准。 在示例性实施例中，使用直接序列扩频通信信号在小区站点和移动单元之间传送信号。 在示例性实施例中，基于由移动单元接收的信号功率和发送到移动单元的功率调整命令来控制移动单元信号的发射功率。

公开(公告)号：US06985728B2

公开(公告)日：2006-01-10

申请号：US10457962

申请日：2003-06-10

申请人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

发明人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

IPC分类号： H04Q7/20 ,  H04B1/69

CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

公开(公告)号：US06894994B1

公开(公告)日：2005-05-17

申请号：US09575073

申请日：2000-05-19

申请人： Matthew S. Grob ,  Paul E. Bender ,  Peter J. Black ,  Roberto Padovani ,  Noam A. Ziv

发明人： Matthew S. Grob ,  Paul E. Bender ,  Peter J. Black ,  Roberto Padovani ,  Noam A. Ziv

IPC分类号： H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04L1/16 ,  H04L1/18 ,  H04L12/28 ,  H04L12/56 ,  H04W80/00 ,  H04W84/00 ,  H04B7/216

CPC分类号： H04L1/0071 ,  H04B1/7103 ,  H04B2201/70702 ,  H04B2201/709709 ,  H04L1/08 ,  H04L1/1809 ,  H04W80/00 ,  H04W84/00

摘要： A wireless packet data communications system that includes a number of modem pool transceivers (MPTs), one or more modem pool controllers (MPCs), and one or more servers. Each MPT receives and processes data packets to generate a modulated signal (e.g., a CDMA spread spectrum signal) suitable for transmission over a terrestrial communications link. Each MPC provides call related processing for one or more MPTs. The servers couple to the MPTs and MPCs via an Internet Protocol (IP) back-bone and provide management of the communications system. The IP back-bone further interconnects the MPTs with one or more data networks and includes a number of routers that route data packets between the data networks and the MPTs. Each MPT can couple to two or more routers for redundancy. Each MPT is operated as an element in an IP network and is associated with an IP address that identifies the MPT. One to three MPTs can be deployed at each cell site to provide wireless data service coverage for up to three sectors at the cell site. The MPCs can either be centralized and coupled to the MPTs via the IP back-bone or distributed about the communications system.

摘要翻译： 包括多个调制解调器池收发器（MPT），一个或多个调制解调器池控制器（MPC）以及一个或多个服务器的无线分组数据通信系统。 每个MPT接收和处理数据分组以产生适于通过地面通信链路传输的调制信号（例如，CDMA扩频信号）。 每个MPC为一个或多个MPT提供与呼叫相关的处理。 这些服务器通过互联网协议（IP）背景耦合到MPT和MPC，并提供通信系统的管理。 IP背板进一步将MPT与一个或多个数据网络互连，并且包括在数据网络和MPT之间路由数据分组的多个路由器。 每个MPT可以耦合到两个或更多路由器进行冗余。 每个MPT作为IP网络中的元素运行，并与识别MPT的IP地址相关联。 可以在每个小区站点部署一到三个MPT，以在小区站点为多达三个扇区提供无线数据服务覆盖。 MPC可以集中化，并通过IP背板耦合到MPT，或者分布在通信系统上。

公开(公告)号：US06885655B2

公开(公告)日：2005-04-26

申请号：US09881386

申请日：2001-06-12

申请人： Roberto Padovani

发明人： Roberto Padovani

IPC分类号： H04B1/04 ,  H04B1/10 ,  H04B7/26 ,  H04L1/20 ,  H04B7/216 ,  H04J3/24

CPC分类号： H04L1/208 ,  H04L1/20

摘要： The character of the noise in a series of incoming symbols received over a wireless link is determined. A series of corresponding bits are recovered based upon the series of incoming symbols. The series of corresponding bits are encoded to determine a series of recovered symbols. A vector product of the series of incoming symbols and the series of recovered symbols is determined. A difference between two symbols within the vector product is determined, wherein the two symbols were transmitted over the wireless link in close temporal proximity to one another. The expected value of a non-orthogonal noise portion of the series of incoming symbols is determined based upon an expected value of the difference between the two symbols.

摘要翻译： 确定通过无线链路接收的一系列输入符号中的噪声的特性。 基于一系列进入符号来恢复一系列相应的比特。 对一系列相应的位进行编码以确定一系列恢复的符号。 确定一系列输入符号和一系列恢复符号的向量积。 确定向量乘积内的两个符号之间的差异，其中两个符号在无线链路上彼此紧密地时间接近地发送。 基于两个符号之间的差的期望值来确定一系列输入符号的非正交噪声部分的期望值。

公开(公告)号：US06661833B1

公开(公告)日：2003-12-09

申请号：US09494838

申请日：2000-01-31

申请人： Peter J. Black ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

发明人： Peter J. Black ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

IPC分类号： H04B169

CPC分类号： H04J13/10 ,  H03K3/84 ,  H04B1/707 ,  H04J13/0022

摘要： Techniques to improve the acquisition process in a spread spectrum environment. The signals from different CDMA systems are spread with different sets of PN sequences, with the PN sequences in each set being uncorrelated to the PN sequences in the other sets. By using uncorrelated PN sequences, the likelihood of detecting a pilot signal from an undesired system is reduced or minimized, and the mean time to acquisition of the pilot signal from the desired system is improved. The mobile station can attempt to acquire the pilot signal by processing the received signal with a first set of PN sequences corresponding to a first hypothesis of the particular signal being acquired. If acquisition of the pilot signal fails, a second set of PN sequences corresponding to a second hypothesis is selected and used to process the received signal. The PN sequences in the second set are uncorrelated to the PN sequences in the first set. The PN sequences for the first set can be generated based on the characteristic polynomials defined by IS-95-A, and the PN sequences for the second set can be the reverse of the PN sequences for the first set.

摘要翻译： 在扩展频谱环境中改进采集过程的技术。 来自不同CDMA系统的信号用不同的PN序列集合扩展，每组中的PN序列与其他集合中的PN序列不相关。 通过使用不相关的PN序列，可以减少或最小化检测来自不需要的系统的导频信号的可能性，并且提高从所需系统获取导频信号的平均时间。 移动台可以尝试通过用对应于所获取的特定信号的第一假设的第一组PN序列处理接收信号来获取导频信号。 如果导频信号的获取失败，则选择对应于第二假设的第二组PN序列来处理接收到的信号。 第二组中的PN序列与第一组中的PN序列不相关。 可以基于由IS-95-A定义的特征多项式来生成第一组的PN序列，并且第二组的PN序列可以是第一组的PN序列的相反。

公开(公告)号：US06574211B2

公开(公告)日：2003-06-03

申请号：US08963386

申请日：1997-11-03

申请人： Roberto Padovani ,  Paul E. Bender ,  Peter J. Black ,  Matthew S. Grob ,  Jurg K. Hinderling ,  Nagabhushana T. Sindhushayana ,  Charles E. Wheatley, III

发明人： Roberto Padovani ,  Paul E. Bender ,  Peter J. Black ,  Matthew S. Grob ,  Jurg K. Hinderling ,  Nagabhushana T. Sindhushayana ,  Charles E. Wheatley, III

IPC分类号： H04B7212

CPC分类号： H04W28/22 ,  H04B1/7103 ,  H04B2201/70702 ,  H04B2201/709709 ,  H04L1/08 ,  H04L1/1628 ,  H04W16/14 ,  H04W24/00 ,  H04W52/04 ,  H04W52/12 ,  H04W52/241 ,  H04W52/248 ,  H04W52/26 ,  H04W52/40

摘要： In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.

公开(公告)号：US06442398B1

公开(公告)日：2002-08-27

申请号：US09409943

申请日：1999-09-30

申请人： Roberto Padovani ,  Bruce A. Judson

发明人： Roberto Padovani ,  Bruce A. Judson

IPC分类号： H04B700

CPC分类号： H04W52/343 ,  H04W52/08 ,  H04W52/221 ,  H04W52/283 ,  H04W52/36

摘要： In one embodiment of method and appartus for determining loading in a communication system, the communication system accumulates a power control commands series and corresponding transmit gain adjustments series between a base station and a designated remote station, under regular operating conditions. After transmissions form the remaining remote stations are interrupted, the communication system repeats the accumulation, and determines the loading according to the accumulated series. Alternatively, the communication system measures power of a test signal injected into base station receiver, under regular operating conditions. After transmissions form the remote stations are interrupted, the communication system repeats the measurement, and determines the loading according to the two measurements. Alternatively, the communication system measures gain of an AGC at the base station's receiver, under regular operating conditions. After transmissions form the remote stations are interrupted, the communication system repeats the measurement, and determines the loading according to the two measurements.

摘要翻译： 在用于确定通信系统中的负载的方法和应用的一个实施例中，通信系统在正常操作条件下，在基站和指定的远程站之间累积功率控制命令序列和对应的发射增益调整序列。 在传输之后，剩余的远程站被中断，通信系统重复累积，并根据累积的序列确定负载。 或者，通信系统在常规操作条件下测量注入基站接收机的测试信号的功率。 在传输之后，远程站被中断，通信系统重复测量，并根据两个测量确定负载。 或者，通信系统在常规操作条件下测量基站的接收机处的AGC的增益。 在传输之后，远程站被中断，通信系统重复测量，并根据两个测量确定负载。

公开(公告)号：US06222830B1

公开(公告)日：2001-04-24

申请号：US08519670

申请日：1995-08-25

申请人： Roberto Padovani ,  Bruce R. Meagher ,  Noam A. Ziv

发明人： Roberto Padovani ,  Bruce R. Meagher ,  Noam A. Ziv

IPC分类号： H04Q700

CPC分类号： H04L1/0057

摘要： A novel and improved system and method for assembling a single data stream from multiple instances of that data stream is described. Data transmitted from a cellular telephone subscriber unit is received by a set of base transceiver stations. Each base transceiver station performs various error detection procedures on segments of the data referred to as frames. These error detection procedures may include CRC check sum verification, Yamamoto metric calculation, re-encoded signal error rate calculation, or a combination thereof. The results of these error detection procedures are placed into a frame quality metric. The frame, frame quality metric, a time stamp and an address are placed into a packet that is transmitted from each base transceiver station to a base station controller which matches packets attempting to transmit the same information using the time stamp and selects one frame from the packets for further processing based on the associated frame quality metric.

摘要翻译： 描述了一种用于组合来自该数据流的多个实例的单个数据流的新颖和改进的系统和方法。 从蜂窝电话用户单元发送的数据由一组基站收发台接收。 每个基站收发器在被称为帧的数据的段上执行各种错误检测过程。 这些错误检测程序可以包括CRC校验和验证，山本度量计算，重新编码的信号错误率计算或其组合。 这些错误检测过程的结果被放置在帧质量度量中。 帧，帧质量度量，时间戳和地址被放置到从每个基站收发器发送到基站控制器的分组中，该基站控制器与尝试使用时间戳发送相同信息的分组匹配，并从 基于相关联的帧质量度量进一步处理的分组。

公开(公告)号：US6157668A

公开(公告)日：2000-12-05

申请号：US316155

申请日：1994-09-30

申请人： Klein S. Gilhousen ,  Roberto Padovani

发明人： Klein S. Gilhousen ,  Roberto Padovani

IPC分类号： H04W52/40 ,  H04B7/005 ,  H04B7/04 ,  H04W16/24 ,  H04W36/06 ,  H04W36/18 ,  H04W36/20 ,  H04W52/24 ,  H04W52/34 ,  H04K1/00

CPC分类号： H04W36/06 ,  H04W36/18 ,  H04W52/24 ,  H04W52/40 ,  H04B7/0491 ,  H04W16/24 ,  H04W36/20 ,  H04W52/34 ,  Y02B60/50

摘要： A plurality of methods for achieving the soft or softer handoff process such that the performance of a system is improved. A first method is based on delaying the softer handoff process. A second method is based on reducing the power of transmissions from the sector having the weakest signal strength. A third method is based on eliminating transmissions from the sector having the weakest signal strength. A fourth method adds a new base station or sector only when the mobile unit is in need of additional power to operate properly. In all four methods, reverse link demodulation in each sector may continue with or without the transmission of the forward link. In all four methods the operation could be based on the signal strength of the reverse link signal or the forward link. It is also possible to combine two or more of these methods to create a hybrid method.

公开(公告)号：US6151502A

公开(公告)日：2000-11-21

申请号：US790497

申请日：1997-01-29

申请人： Roberto Padovani ,  Roy F. Quick

发明人： Roberto Padovani ,  Roy F. Quick

IPC分类号： H04W36/18 ,  H04B7/26 ,  H04W48/20 ,  H04Q7/20

CPC分类号： H04W36/18 ,  H04W48/20

摘要： A method and apparatus for providing soft handoff in a mobile communication system. In current systems is that the members of active set are determined in accordance with comparisons of measured pilot energy with fixed thresholds. However, the value of providing a redundant communication link to a mobile station depends strongly on the energy of other signals being provided to the mobile station. In the present invention, the signal strengths of other base stations in communication with a mobile station are considered when determining whether adding a base to that set of base stations in communication with the remote station is of sufficient value to justify the impact on system capacity.

摘要翻译： 一种用于在移动通信系统中提供软越区切换的方法和装置。 在当前系统中，根据测量的导频能量与固定阈值的比较来确定活动组的成员。 然而，向移动台提供冗余通信链路的价值在很大程度上取决于提供给移动台的其他信号的能量。 在本发明中，当确定是否向与远程站通信的那组基站添加基站时，考虑与移动台通信的其他基站的信号强度足以证明对系统容量的影响。