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    • 5. 发明授权
    • Periodic cell search
    • 定期细胞检索
    • US07158505B2
    • 2007-01-02
    • US09923263
    • 2001-08-03
    • Stephen G. DickEldad Zeira
    • Stephen G. DickEldad Zeira
    • H04B1/10
    • H04B1/7083H04B1/7075H04B1/70755H04B2201/70702
    • A wireless communication system which comprises a plurality of base stations and a user equipment. Each base station transmits a common primary synchronization code (PSC) in a primary synchronization channel at a different timing within a system frame, and a midamble code in a broadcast channel. A transmitted power level of the PSC and midamble code are at a common fixed ratio for each base station. The user equipment (UE) is capable of conducting cell search and includes a receiver for receiving said PSCs, a signal power measuring device for measuring the power level of received PSCs and identifying a frame timing of received PSCs which exceed a power threshold, and a processor for analyzing data signals received in the primary synchronization channel associated with the PSC with the highest power level of the received PSCs with a threshold exceeding power level. The processor also synchronizes or maintains synchronization with the base station associated with the highest PSC, the data signals including secondary synchronization codes.
    • 一种包括多个基站和用户设备的无线通信系统。 每个基站在系统帧内的不同定时在主同步信道中发送公共主同步码(PSC),并在广播信道中发送中间码。 对于每个基站,PSC和中间码的发射功率电平为公共固定比。 用户设备(UE)能够进行小区搜索,并且包括用于接收所述PSC的接收机,用于测量接收的PSC的功率电平并识别超过功率阈值的接收的PSC的帧定时的信号功率测量设备,以及 处理器,用于分析在具有阈值超过功率水平的所接收的PSC的最高功率电平的与PSC相关联的主同步信道中接收的数据信号。 处理器还与与最高PSC相关联的基站同步或维持同步,数据信号包括次同步码。
    • 7. 发明授权
    • Uplink scrambling code assignment for a random access channel
    • 用于随机接入信道的上行链路扰码编码分配
    • US06958989B1
    • 2005-10-25
    • US09574791
    • 2000-05-19
    • Stephen G. DickEldad Zeira
    • Stephen G. DickEldad Zeira
    • H04J3/00H04J13/00H04L12/56H04W74/08
    • H04W74/006H04J13/16H04W74/0833H04W74/0866
    • A user equipment transmits a data packet using a selected signature in a time slot of a radio frame within a superframe of a random access channel. The superframe being time divided into radio frames. A base station identifies the selected signature, transmission time slot and transmission radio frame of the data packet. The base station determines an uplink scrambling code for the user equipment based on in part the identified signature, transmission time slot and transmission radio frame. The base station selectively transmits an acknowledgment message based on in part an availability of the determined uplink scrambling code. The user equipment receives the acknowledgment message and transmits a subsequent data packet using the determined uplink scrambling code.
    • 用户设备在随机接入信道的超帧内的无线帧的时隙中使用所选择的签名来发送数据分组。 超帧被时分分为无线电帧。 基站识别数据分组的所选择的签名,传输时隙和传输无线电帧。 基站部分地基于所识别的签名,传输时隙和传输无线电帧来确定用户设备的上行链路扰码。 基站部分地基于确定的上行链路扰码的可用性选择性地发送确认消息。 用户设备接收确认消息,并使用确定的上行链路扰码发送后续数据包。
    • 8. 发明授权
    • Random access channel access and backoff mechanism
    • 随机接入信道接入和退避机制
    • US06721281B1
    • 2004-04-13
    • US09593879
    • 2000-06-14
    • Stephen G. DickEldad Zeira
    • Stephen G. DickEldad Zeira
    • G01R3108
    • H04W74/006H04W48/12H04W74/0833
    • A base station transmits access control signals on a periodic basis having a first transmission rate. The base station transmits access control modification signals at a second transmission rate higher than the first transmission rate. The user equipment transmits an access attempt signal. The access attempt signal requests the base station to permit the user equipment access to the random access channel. The user equipment receives the transmitted access control signals and access modification signals. A wait period is determined based on in part the received access control signals and access control modification signals. In response to an unsuccessful access attempt, the user equipment delays transmitting a subsequent access attempt signal for the wait period.
    • 基站发送具有第一传输速率的周期性的接入控制信号。 基站以比第一传输速率高的第二传输速率发送接入控制修改信号。 用户设备发送接入尝试信号。 访问尝试信号请求基站允许用户设备访问随机接入信道。 用户设备接收发送的接入控制信号和接入修改信号。 部分地基于所接收的访问控制信号和访问控制修改信号来确定等待时间。 响应于不成功的访问尝试,用户设备延迟发送等待时间段的后续访问尝试信号。