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公开(公告)号：US06535547B1
公开(公告)日：2003-03-18
申请号：US09324372
申请日：1999-06-02
申请人： Bo Lyckegård , Riaz Esmailzadeh , Johan Nyström , Erik Dahlman , Sandeep Chennakeshu , Karim Jamal
发明人： Bo Lyckegård , Riaz Esmailzadeh , Johan Nyström , Erik Dahlman , Sandeep Chennakeshu , Karim Jamal
IPC分类号： H04L2730
CPC分类号： H04W74/004 , H04J13/004 , H04W74/0833
摘要： A method for improving the performance of a random access communications system in a variable radio environment is disclosed, whereby at least one valid set of burst signatures is used for transmission by one or more mobile stations. Each set includes at least one signature with a different signature-length than the signatures in other sets. The different signature-lengths can be optimized for the operational environments involved (e.g., longer signatures for slower-moving mobile stations, and shorter signatures for high-speed mobile stations). Alternatively, at least one differentially-encoded signature is used for random access transmissions, in order to reduce the radio channel's sensitivity to large doppler spreads and frequency errors.
摘要翻译： 公开了一种用于在可变无线电环境中改善随机接入通信系统的性能的方法，由此至少一个有效的突发特征集合被一个或多个移动台用于传输。 每个集合包括与其他集合中的签名不同的签名长度的至少一个签名。 不同的签名长度可以针对所涉及的操作环境进行优化（例如，较慢移动的移动站的签名较长，以及用于高速移动站的较短的签名）。 或者，至少一个差分编码的签名用于随机接入传输，以便减少无线电信道对大多普勒扩展和频率误差的敏感性。
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2.发明授权
公开(公告)号：US5956368A
公开(公告)日：1999-09-21
申请号：US924709
申请日：1997-08-29
申请人： Karim Jamal , Riaz Esmailzadeh , Erik Dahlman
发明人： Karim Jamal , Riaz Esmailzadeh , Erik Dahlman
CPC分类号： H04B7/2628
摘要： With respect to a direct sequence, code division multiple access spread spectrum transmitter, symbol information relating to dedicated/common channels (such as the traffic or control channels) is spread to generate a plurality of corresponding dedicated/common channel intermediate signals. These intermediate signals are then summed to generate an output signal that is scrambled by a selected scrambling code. Symbol information relating to acquisition-related channels (such as synchronization information or the pilot or long code group code channels) is also spread to generate a plurality of corresponding acquisition-related intermediate signals. These acquisition-related intermediate signals are then selectively added to the scrambled output signal producing a downlink signal for multi-channel transmission over a communications medium sharing one transmission communications frequency.
摘要翻译： 对于直接序列，码分多址扩频发射机，与专用/公共信道（诸如业务或控制信道）相关的符号信息被扩展以产生多个对应的专用/公共信道中间信号。 然后将这些中间信号相加以产生被选择的扰码加扰的输出信号。 与采集相关信道（诸如同步信息或导频码或长码组码信道）相关的符号信息也被扩展以产生多个对应的采集相关中间信号。 这些采集相关的中间信号然后被选择性地添加到加扰的输出信号，产生用于在共享一个传输通信频率的通信介质上进行多信道传输的下行链路信号。
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公开(公告)号：US06724813B1
公开(公告)日：2004-04-20
申请号：US09172015
申请日：1998-10-14
IPC分类号： H04B138
CPC分类号： H04W72/02 , H04B7/2628 , H04W8/26 , H04W28/18 , H04W56/00 , H04W72/0406
摘要： In a communications system, communications resources are allocated in a dynamic, “as needed” fashion. No explicit signaling is needed to exchange information pertaining specifically to an allocated communications resource. Instead, resources are implicitly allocated by using one or more parameters known to both the radio access network and mobile station that are more or less unique to the mobile station. Such parameters are used to generate or address a communications resource for use by the mobile station. The parameters might, for example, be information readily acquired or communicated as a result of a synchronization procedure, a mobile station registration procedure, a mobile station access procedure, a paging procedure, etc. Example parameters may include a system frame number, a system identification, a radio access network identification, a base station identification, a cell identification, a mobile station-associated signature, an access reference number corresponding to the mobile station, a time instant when an acknowledgment message is received, etc.
摘要翻译： 在通信系统中，通信资源以动态的“必要”方式分配。 不需要明确的信令来交换与分配的通信资源有关的信息。 相反，通过使用对于移动台或多或少是唯一的无线电接入网络和移动台已知的一个或多个参数来隐含地分配资源。 这样的参数用于生成或寻址由移动台使用的通信资源。 这些参数可以是例如作为同步过程，移动站登记过程，移动站访问过程，寻呼过程等的结果容易获取或传达的信息。示例性参数可以包括系统帧号，系统 识别，无线接入网标识，基站识别，小区识别，移动台相关签名，与移动台对应的接入参考号码，接收确认消息的时刻等。
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4.发明授权
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。
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公开(公告)号：US06760361B2
公开(公告)日：2004-07-06
申请号：US09742714
申请日：2000-12-20
IPC分类号： H04L2732
CPC分类号： H04B1/7083 , H04J13/107 , H04L7/043
摘要： A special coding scheme is disclosed for more effectively acquiring a long code and frame timing during a cell search in a CDMA communications system. A code set of length M Q-ary code words including symbols from a set of Q short codes is defined with certain properties. The primary property to be satisfied is that no cyclic shift of a code word yields a valid code word. The other properties to be satisfied are that there is a one-to-one mapping between a long code message and a valid code word, and a decoder should be able to find both the random shift (thereby implicitly finding the frame timing) and the transmitted code word (i.e., its associated long code indication message) in the presence of interference and noise, with some degree of accuracy and reasonable complexity.
摘要翻译： 公开了一种特殊的编码方案，用于在CDMA通信系统中的小区搜索期间更有效地获取长码和帧定时。 使用某些属性来定义包括来自一组Q短码的符号的长度为M个Q字节码字的码组。 要满足的主要特征是代码字的循环移位不产生有效的代码字。 要满足的其他属性是在长码消息和有效码字之间存在一对一的映射，并且解码器应该能够找到随机移位（从而隐含地找到帧定时）和 在存在干扰和噪声的情况下，传输码字（即其相关联的长码指示消息）具有一定程度的准确性和合理的复杂度。
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公开(公告)号：US06597675B1
公开(公告)日：2003-07-22
申请号：US09148224
申请日：1998-09-04
申请人： Riaz Esmailzadeh , Karim Jamal , Christiaan Roobol
发明人： Riaz Esmailzadeh , Karim Jamal , Christiaan Roobol
IPC分类号： H04B7216
CPC分类号： H04L1/1867 , H04B1/707 , H04B2201/70701 , H04J13/107 , H04W28/06 , H04W72/0466 , H04W74/004 , H04W74/0833
摘要： A method is disclosed for processing mobile-originated random access requests in a mobile telecommunications system that randomly selects new signatures for re-transmissions in the event that collisions have occurred. As such, the random access re-transmissions are randomized over the signature domain instead of just over the time domain. Consequently, the disclosed invention significantly shortens random access delays caused by collisions or erroneous arrivals at base station receivers, and also significantly reduces the interval between random access re-transmissions.
摘要翻译： 公开了一种用于在移动电信系统中处理移动发起的随机接入请求的方法，该方法在发生冲突的情况下随机选择用于重传的新签名。 因此，随机访问重传是通过签名域而不是仅在时域上随机化的。 因此，所公开的发明显着缩短了由基站接收机的冲突或错误到达引起的随机接入延迟，并且还显着地减少了随机接入重传之间的间隔。
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7.发明授权
公开(公告)号：US5930366A
公开(公告)日：1999-07-27
申请号：US921135
申请日：1997-08-29
申请人： Karim Jamal , Riaz Esmailzadeh , Yi-Pin Eric Wang
发明人： Karim Jamal , Riaz Esmailzadeh , Yi-Pin Eric Wang
IPC分类号： H04B1/7073 , H04B1/7075 , H04B1/7083 , H04B7/26 , H04Q7/38 , H04L9/00
CPC分类号： H04B1/70752 , H04B1/70735 , H04B1/7083 , H04B2201/70701
摘要： Each transmission frame within a spread spectrum communications system relating to synchronization code transmission is divided into a plurality of slots. Each of the slots includes a primary (pilot) code c.sub.p and a secondary (combined) code c.sub.s/lci that includes information identifying or indicative of both a frame timing and a scrambling code for synchronization. This information concerning frame timing and scrambling code may be encoded in the combined code c.sub.s/lci itself, as well as in the modulation values of the sequences of plural combined codes within a frame. Alternatively, the information is encoded in the sequence of plural combined codes c.sub.s/lci transmitted in each frame, as well as in the modulated values of the sequences of plural combined codes within a frame. As yet another alternative, the information is encoded in the timing of the combined code c.sub.s/lci transmission within each slot of the frame relative to its associated primary code c.sub.p.
摘要翻译： 与同步码传输相关的扩频通信系统内的每个传输帧被划分成多个时隙。 每个时隙包括主（代码）代码+ E，ovs c + EE p和辅助（组合）代码+ E，ovs c + EE s / lci，其包括识别或指示帧定时和加扰 同步代码 关于帧定时和扰码的信息可以以组合码+ E，ovs c + EE s / lci本身以及帧内的多个组合码的序列的调制值进行编码。 或者，信息按照在每帧中发送的多个组合码+ E，ovs + EE s / lci的序列以及帧内的多个组合码的序列的调制值进行编码。 作为另一个替代方案，信息在帧相对于其相关联的主代码+ E，ovs c + EE p的每个时隙内的组合代码+ E，ovs c + EE s / lci传输的定时编码。
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8.发明申请TRANSMISSION POWER CONTROL SYSTEM AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM 审中-公开传动功率控制系统和移动通信系统的设备公开(公告)号：US20090005107A1
公开(公告)日：2009-01-01
申请号：US12198918
申请日：2008-08-27
申请人： Riaz Esmailzadeh , Takashi Yano , Nobukazu Doi
发明人： Riaz Esmailzadeh , Takashi Yano , Nobukazu Doi
IPC分类号： H04B7/00
CPC分类号： H04W52/24 , H04W52/362
摘要： A method and apparatus for controlling the power of a signal transmitted between a base station and a mobile terminal which constitute a mobile communication system. At least one of the base station and the mobile terminal has functions to compare a predetermined reference value and a necessary transmission power obtained as a result of transmission power control in order to compensate for a signal intensity fluctuation occurring on a link between the base station and the mobile terminal, temporarily stopping the transmission if the necessary transmission power is larger than a predetermined permissible value, and transmit the signal if the necessary transmission power is equal to or smaller than the predetermined permissible value.
摘要翻译： 一种用于控制在构成移动通信系统的基站和移动终端之间传输的信号的功率的方法和装置。 基站和移动终端中的至少一个具有将预定参考值和作为发送功率控制的结果获得的必要发送功率进行比较的功能，以便补偿基站与基站之间的链路上发生的信号强度波动 如果必要的发送功率大于预定的允许值，则暂时停止发送，并且如果必要的发送功率等于或小于预定的允许值则发送该信号。
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公开(公告)号：US06961362B2
公开(公告)日：2005-11-01
申请号：US09892459
申请日：2001-06-28
CPC分类号： H04W52/08 , H04B1/7107 , H04W52/12 , H04W52/20 , H04W52/24
摘要： The purpose of the present invention is to offer a structure of a CDMA system having a power control method and interference cancellers which can effectively increase the system capacity and is resistant to sudden changes on the communication path, and to achieve a power control method with a fast response capable of preventing unnecessary increases in the transmission power (and multiple access interference) of the uplink by reflecting the values of the post-interference cancellation signal-to-interference power ratio in the generation of power control command information. The invention is directed to a power control method in a communication system for performing communications by code-division multiple access between a mobile station and base station, wherein a multiple access interference signal contained in a reception signal from the mobile station is cancelled, a post-interference cancellation signal-to-interference power ratio of the reception signal currently received is estimated, a power control command is generated by comparing the estimated post-interference cancellation signal-to-interference power ratio and a target value for power control, and transmitting this power control command to the mobile station to control the transmission power of the mobile station.
摘要翻译： 本发明的目的是提供具有功率控制方法和干扰消除器的CDMA系统的结构，其可以有效地增加系统容量并且抵抗通信路径上的突然变化，并且实现具有 能够通过在生成功率控制命令信息中反映干扰后消除信号与干扰功率比的值来防止上行链路的发送功率（和多址干扰）的不必要的增加的快速响应。 本发明涉及一种通信系统中的功率控制方法，用于通过移动站与基站之间的码分多址进行通信，其中包含在来自移动台的接收信号中的多址干扰信号被取消， 估计当前接收到的接收信号的干扰消除信号与干扰功率比，通过比较估计的干扰后消除信号与干扰功率比和用于功率控制的目标值，生成功率控制命令，并发送 该功率控制命令到移动台来控制移动台的发射功率。
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公开(公告)号：US06463296B1
公开(公告)日：2002-10-08
申请号：US09251018
申请日：1999-02-16
IPC分类号： H04Q720
摘要： A method for controlling the power transmission levels in a spread spectrum or CDMA cellular system is disclosed, in which the decision to increase or decrease the transmission power level of a mobile station or base station, and the amount of any such increase or decrease made, is based on the weighted combination of a plurality of factors that indicate existing channel conditions. For example, the weight can be set according to the reliability of each channel condition factor involved.
摘要翻译： 公开了一种用于控制扩频或CDMA蜂窝系统中的功率传输电平的方法，其中增加或减少移动台或基站的发射功率电平的决定以及任何这种增加或减少的量， 基于指示现有信道条件的多个因素的加权组合。 例如，可以根据所涉及的每个信道条件因素的可靠性设置权重。
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