公开(公告)号：US5991330A

公开(公告)日：1999-11-23

申请号：US884002

申请日：1997-06-27

申请人： Erik Dahlman ,  Maria Gustafsson ,  Riaz Esmailzadeh

发明人： Erik Dahlman ,  Maria Gustafsson ,  Riaz Esmailzadeh

IPC分类号： H04B1/7073 ,  H04B1/7075 ,  H04L7/00 ,  H04Q7/38 ,  H04B15/00

CPC分类号： H04B1/70752 ,  H04B1/70735 ,  H04B2201/70701

摘要： Each frame of a pilot channel transmission in a spread spectrum communications system is divided into a plurality of synchronization slots. Each of the synchronization slots includes a pilot code, and at least one of the synchronization slots further includes a framing synchronization code. To extract frame and slot synchronization information from the pilot channel transmission, pilot code timing is first identified by applying a matched filter or correlation to a received pilot signal, identifying peaks, and using the peaks to find a timing reference indicative of synchronization slot boundaries. Next, the set of known framing synchronization codes are correlated with the received signal over the included found synchronization slots. Given that the location within the frame of the known framing synchronization code(s) is known, once a correlation match is found at a certain slot location, the boundary of the frame (i.e., the frame synchronization) relative thereto is then also known.

摘要翻译： 扩频通信系统中的导频信道传输的每一帧被分成多个同步时隙。 每个同步时隙包括导频代码，并且至少一个同步时隙还包括成帧同步码。 为了从导频信道传输中提取帧和时隙同步信息，首先通过对接收到的导频信号应用匹配的滤波器或相关性来识别导频代码定时，识别峰值，并且使用该峰值找到指示同步时隙边界的定时参考。 接下来，已知的成帧同步码的集合通过所包含的已发现的同步时隙与接收的信号相关。 假定已知成帧同步码的帧内的位置是已知的，一旦在某个时隙位置处找到相关匹配，则帧的边界（即，帧同步）也是已知的。

公开(公告)号：US6163533A

公开(公告)日：2000-12-19

申请号：US847655

申请日：1997-04-30

申请人： Riaz Esmailzadeh ,  Maria Gustafsson

发明人： Riaz Esmailzadeh ,  Maria Gustafsson

IPC分类号： H04B7/26 ,  H04J13/00 ,  H04J13/10 ,  H04J13/16 ,  H04L12/56 ,  H04W72/04 ,  H04W74/08 ,  H04B7/216

CPC分类号： H04W74/004 ,  H04B2201/70701 ,  H04B2201/709709 ,  H04J13/0029 ,  H04J13/0033 ,  H04J13/107 ,  H04J13/16 ,  H04W28/06 ,  H04W72/0466 ,  H04W74/0833

摘要： A method, system, and apparatus assigns each sector in a cell a unique preamble spreading code and a unique long-code which is concatenated with a signature-associated short code to spread the data in the data field. The period selected for the long-code can be relatively long in duration (e.g., up to hours or days in length). The widths of the transmission time slots are set equal to the length of the preambles. Subsequent to the preamble period, the matched filter is still enabled to receive the preambles of other random access requests. Therefore, the matched filter can be utilized continuously and more efficiently. Additionally, the length of the data field is not restricted. The method of concatenated spreading of the data field portion of the random access packet allows a user to generate a packet which is as long as desired. Moreover, there is very little danger that the resulting packet will collide with other random access request packets.

摘要翻译： 一种方法，系统和装置将单元中的每个扇区分配唯一的前导码扩展码和独特的长码，其与签名相关联的短码连接以在数据字段中扩展数据。 为长码选择的期间可以在持续时间（例如长达数小时或数天）内相对较长。 传输时隙的宽度被设置为等于前导码的长度。 在前导码周期之后，匹配滤波器仍然能够接收其他随机接入请求的前同步码。 因此，可以连续且更有效地利用匹配滤波器。 另外，数据字段的长度不受限制。 随机接入分组的数据字段部分的级联扩展的方法允许用户生成与期望一样长的分组。 而且，所产生的分组与其他随机接入请求分组会发生冲突的危险性很小。

公开(公告)号：US06985474B2

公开(公告)日：2006-01-10

申请号：US10457276

申请日：2003-06-09

申请人： Erik Dahlman ,  Per Beming ,  Maria Gustafsson

发明人： Erik Dahlman ,  Per Beming ,  Maria Gustafsson

IPC分类号： H04B7/216

CPC分类号： H04W74/006 ,  H04L1/1867 ,  H04W36/16 ,  H04W74/0833

摘要： A method for processing multiple random access requests is disclosed in which a base station transmits an acquisition indicator signal, which indicates that the base station has detected the presence of a random access transmission. The acquisition indicator can be generated based on the amount of energy received on the random access channel (e.g., as opposed to the correct/incorrect decoding of a random access message). Consequently, the delay between the beginning of the random access transmission and the beginning of the acquisition indicator transmission is significantly shorter than the delay to the beginning of an acknowledgment transmission based on the reception of a correctly decoded random access message. If a mobile station does not receive a positive acquisition indicator, it should interrupt the present transmission and start to re-transmit the random access burst in the next time slot, while modifying the transmission power level accordingly between the successive re-transmissions.

公开(公告)号：US06606313B1

公开(公告)日：2003-08-12

申请号：US09166679

申请日：1998-10-05

申请人： Erik Dahlman ,  Per Beming ,  Maria Gustafsson

发明人： Erik Dahlman ,  Per Beming ,  Maria Gustafsson

IPC分类号： H04B7216

CPC分类号： H04W74/006 ,  H04L1/1867 ,  H04W36/16 ,  H04W74/0833

摘要： A method for processing multiple random access requests is disclosed in which a base station transmits an acquisition indicator signal, which indicates that the base station has detected the presence of a random access transmission. The acquisition indicator can be generated based on the amount of energy received on the random access channel (e.g., as opposed to the correct/incorrect decoding of a random access message). Consequently, the delay between the beginning of the random access transmission and the beginning of the acquisition indicator transmission is significantly shorter than the delay to the beginning of an acknowledgment transmission based on the reception of a correctly decoded random access message. If a mobile station does not receive a positive acquisition indicator, it should interrupt the present transmission and start to re-transmit the random access burst in the next time slot, while modifying the transmission power level accordingly between the successive re-transmissions.

摘要翻译： 公开了一种用于处理多个随机接入请求的方法，其中基站发送指示基站已经检测到随机接入传输的存在的获取指示符信号。 可以基于在随机接入信道上接收的能量的量（例如，与随机接入消息的正确/不正确的解码相反）来生成采集指示符。 因此，基于正确解码的随机接入消息的接收，随机接入传输的开始和采集指示符传输的开始之间的延迟明显短于到确认传输开始的延迟。 如果移动台没有接收到正的采集指示符，那么它应该中断当前的传输，并开始重新发送下一个时隙中的随机接入突发，同时在连续的重传之间相应地修改发射功率电平。

公开(公告)号：USD503465S1

公开(公告)日：2005-03-29

申请号：US29195444

申请日：2003-12-11

申请人： Maria Gustafsson

设计人： Maria Gustafsson

公开(公告)号：US06643275B1

公开(公告)日：2003-11-04

申请号：US09079438

申请日：1998-05-15

申请人： Maria Gustafsson ,  Henrik Olofsson ,  Fredrik Ovesjö ,  Georg Frank ,  Wolfgang Granzow

发明人： Maria Gustafsson ,  Henrik Olofsson ,  Fredrik Ovesjö ,  Georg Frank ,  Wolfgang Granzow

IPC分类号： H04Q700

CPC分类号： H04J13/0044 ,  H04B1/7115 ,  H04B7/2628 ,  H04W74/0866

摘要： An uplink common physical channel (random access channel) frame structure with a separate preamble and data portion. The preamble is used by a base station to detect that a mobile station is attempting a random access request. The data portion of the channel includes user data, and pilot symbols that provide energy for channel estimation during reception of the data portion. A guard interval is preferably inserted between the preamble and data portion of the frame, which enables data detection to occur during an idle period. As such, the frame structures for both the common physical (random access) uplink channel and dedicated physical (traffic) uplink channel are compatible.

摘要翻译： 具有单独前导码和数据部分的上行链路公共物理信道（随机接入信道）帧结构。 前导码由基站用于检测移动台正在尝试随机接入请求。 信道的数据部分包括用户数据和在接收数据部分期间为信道估计提供能量的导频符号。 优选地，在帧的前导码和数据部分之间插入保护间隔，这使得能够在空闲时段期间进行数据检测。 这样，用于公共物理（随机接入）上行链路信道和专用物理（业务）上行链路信道的帧结构是兼容的。

公开(公告)号：US06381229B1

公开(公告)日：2002-04-30

申请号：US09096930

申请日：1998-06-12

申请人： Per Narvinger ,  Maria Gustafsson

发明人： Per Narvinger ,  Maria Gustafsson

IPC分类号： H04Q700

CPC分类号： H04J13/0044 ,  H04B1/7115 ,  H04B7/2628 ,  H04W74/0866

摘要： An uplink common physical channel (random access channel) frame structure with a separate preamble and data portion. The preamble is used by a base station to detect that a mobile station is attempting a random access request. The data portion of the channel includes user data, and pilot symbols that provide energy for channel estimation during reception of the data portion. A guard interval can be generated using a “filler” made up of dummy chips, predetermined symbols, and/or an unmodulated carrier, and inserted between the preamble and data portion of the frame, thus enabling a mobile station to maintain its power transmission and making it easier to implement such a guard interval in a WCDMA system.

摘要翻译： 具有单独前导码和数据部分的上行链路公共物理信道（随机接入信道）帧结构。 前导码由基站用于检测移动台正在尝试随机接入请求。 信道的数据部分包括用户数据和在接收数据部分期间为信道估计提供能量的导频符号。 可以使用由虚拟芯片，预定符号和/或未调制载波组成的“填充器”来生成保护间隔，并且插入在帧的前导码和数据部分之间，从而使移动台能够保持其功率传输，并且 使得在WCDMA系统中更容易实现这种保护间隔。