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    • 1. 发明授权
    • Random access structure for optimal cell coverage
    • 用于最佳细胞覆盖的随机接入结构
    • US08259598B2
    • 2012-09-04
    • US11833329
    • 2007-08-03
    • Pierre BertrandAnand DabakJing Jiang
    • Pierre BertrandAnand DabakJing Jiang
    • G08C15/00
    • H04W74/0866H04J3/0682H04L27/2607
    • Apparatus and method for accessing a wireless telecommunications network by transmitting a random access signal. The random access signal includes a cyclic prefix signal and a guard interval. The cyclic prefix signal and the guard interval are adapted to optimize random access channel coverage in a telecommunications cell. The disclosed method for transmitting a random access signal includes transmitting a cyclic prefix signal. The duration of the cyclic prefix signal is approximately the sum of a maximum round trip delay duration of the telecommunications cell and a maximum delay spread duration. The method further includes providing a guard interval. The guard interval duration being approximately the duration of the maximum round trip delay of the telecommunications cell.
    • 通过发送随机接入信号来接入无线电信网络的装置和方法。 随机接入信号包括循环前缀信号和保护间隔。 循环前缀信号和保护间隔适于优化电信小区中的随机接入信道覆盖。 所公开的用于发送随机接入信号的方法包括发送循环前缀信号。 循环前缀信号的持续时间大约是电信小区的最大往返延迟持续时间和最大延迟扩展持续时间之和。 该方法还包括提供保护间隔。 保护间隔持续时间大约是电信小区最大往返延迟的持续时间。
    • 4. 发明授权
    • Random access structure for wireless networks
    • 无线网络的随机接入结构
    • US08098745B2
    • 2012-01-17
    • US11691549
    • 2007-03-27
    • Pierre BertrandJing JiangShantanu KangudeTarik Muharemovic
    • Pierre BertrandJing JiangShantanu KangudeTarik Muharemovic
    • H04K1/10
    • H04W74/08H04J13/00H04J13/14H04L5/0044H04L5/006H04L27/2602H04W74/002H04W74/0833
    • Apparatus and methods for accessing a wireless telecommunications network by transmitting a random access signal. The random access signal includes a random access preamble signal selected from a set of random access preamble signals constructed by cyclically shift selected root CAZAC sequences. The random access signal may be one or more transmission sub-frames in duration, the included random access preamble sequence's length being extended with the signal to provide improved signal detection performance in larger cells and in higher interference environments. The random access signal may include a wide-band pilot signal facilitating base station estimation of up-link frequency response in some situations. Each of the plurality of available random access preamble sequences may be assigned a unique information value. The base station may use the information encoded in the random access preamble to prioritize responses and resource allocations. Random access signal collisions are dealt with by a combination of preamble code space randomness and back-off procedures.
    • 通过发送随机接入信号来接入无线电信网络的装置和方法。 随机接入信号包括从由循环移位选择的根CAZAC序列构成的一组随机接入前同步信号中选择的随机接入前导信号。 随机接入信号可以是持续时间中的一个或多个传输子帧,所包含的随机接入前同步码序列的长度随信号扩展,以在较大的小区和较高的干扰环境中提供改善的信号检测性能。 随机接入信号可以包括宽带导频信号,有助于在某些情况下基站估计上行链路频率响应。 可以为多个可用随机接入前导码序列中的每一个分配唯一的信息值。 基站可以使用在随机接入前导码中编码的信息来优先处理响应和资源分配。 随机接入信号冲突由前导码空间随机性和退避程序的组合来处理。
    • 8. 发明申请
    • RANDOM ACCESS STRUCTURE FOR WIRELESS NETWORKS
    • 无线网络的随机访问结构
    • US20070230600A1
    • 2007-10-04
    • US11691549
    • 2007-03-27
    • Pierre BertrandJing JiangShantanu KangudeTarik Muharemovic
    • Pierre BertrandJing JiangShantanu KangudeTarik Muharemovic
    • H04K1/10
    • H04W74/08H04J13/00H04J13/14H04L5/0044H04L5/006H04L27/2602H04W74/002H04W74/0833
    • Apparatus and methods for accessing a wireless telecommunications network by transmitting a random access signal. The random access signal includes a random access preamble signal selected from a set of random access preamble signals constructed by cyclically shift selected root CAZAC sequences. The random access signal may be one or more transmission sub-frames in duration, the included random access preamble sequence's length being extended with the signal to provide improved signal detection performance in larger cells and in higher interference environments. The random access signal may include a wide-band pilot signal facilitating base station estimation of up-link frequency response in some situations. Each of the plurality of available random access preamble sequences may be assigned a unique information value. The base station may use the information encoded in the random access preamble to prioritize responses and resource allocations. Random access signal collisions are dealt with by a combination of preamble code space randomness and back-off procedures.
    • 通过发送随机接入信号来接入无线电信网络的装置和方法。 随机接入信号包括从由循环移位选择的根CAZAC序列构成的一组随机接入前同步信号中选择的随机接入前导信号。 随机接入信号可以是持续时间中的一个或多个传输子帧,所包含的随机接入前同步码序列的长度随信号扩展,以在较大的小区和较高的干扰环境中提供改善的信号检测性能。 随机接入信号可以包括宽带导频信号,有助于在某些情况下基站估计上行链路频率响应。 可以为多个可用随机接入前导码序列中的每一个分配唯一的信息值。 基站可以使用在随机接入前导码中编码的信息来优先处理响应和资源分配。 随机接入信号冲突由前导码空间随机性和退避程序的组合来处理。