公开(公告)号：US20170094472A1

公开(公告)日：2017-03-30

申请号：US15370213

申请日：2016-12-06

申请人： Arvind Merwaday ,  Ismail Guvenc

发明人： Arvind Merwaday ,  Ismail Guvenc

IPC分类号： H04W4/02 ,  H04W36/32

CPC分类号： H04W4/027 ,  H04W4/021 ,  H04W36/0083 ,  H04W36/0088 ,  H04W36/32 ,  H04W64/006 ,  H04W72/048

摘要： Techniques are disclosed for determining a specific velocity of a device attached to a wireless network. The specific velocity can be determined using a handover count of the base station boundary transitions over a time window and/or using a set of sojourn time samples that each denote the duration the device remains in the zone of a particular base station. Techniques operate effectively in cellular networks having high base station densities. The specific velocity estimates may be inputs to components on the device or network to adjust a local device function or performance behavior.

公开(公告)号：US08428519B2

公开(公告)日：2013-04-23

申请号：US13165059

申请日：2011-06-21

申请人： Alphan Sahin ,  Ismail Guvenc ,  Huseyin Arslan

发明人： Alphan Sahin ,  Ismail Guvenc ,  Huseyin Arslan

IPC分类号： H04B1/00

CPC分类号： H04W16/16 ,  H04W84/045

摘要： In one embodiment, a method of mitigating uplink inter-carrier interference (ICI) from macrocell mobile stations at a dedicated channel femtocell base station is provided that includes: determining a timing offset for a femtocell uplink symbol timing that reduces the ICI based upon an expected spatial distribution for the macrocell mobile stations with respect to the femtocell base station; communicating the timing offset to at least one femtocell mobile station; and at the femtocell base station, receiving an uplink symbol transmission from the at least one femtocell mobile station according to the timing offset.

摘要翻译： 在一个实施例中，提供了一种在专用信道毫微微小区基站处减轻来自宏小区移动站的上行链路载波间干扰（ICI）的方法，其包括：基于预期的方式来确定用于减少ICI的毫微微小区上行链路符号定时的定时偏移 相对于毫微微小区基站的宏小区移动站的空间分布; 将定时偏移传送到至少一个毫微微蜂窝移动站; 并且在所述毫微微小区基站处，根据所述定时偏移从所述至少一个毫微微小区移动站接收上行链路符号传输。

公开(公告)号：US08422469B2

公开(公告)日：2013-04-16

申请号：US12501320

申请日：2009-07-10

申请人： Ismail Guvenc

发明人： Ismail Guvenc

IPC分类号： H04W72/04

CPC分类号： H04L5/0007 ,  H04L5/0033 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0062 ,  H04L5/0092 ,  H04W16/14 ,  H04W24/00 ,  H04W72/00 ,  H04W72/0453 ,  H04W72/082 ,  H04W84/045

摘要： A method for minimizing interference is applicable to a primary network whether or not spectrum resources are assigned to its users using a block-wise subcarrier assignment scheme or a randomized allocation scheme. The identified unused spectrum resources that are to be assigned to the users of the opportunistic network exclude un-used subcarriers adjacent to subcarriers used by the users of the primary network to avoid interference. The opportunistic network may assign the identified unused spectrum resources using a scheme that selects a block size for an adaptive modulation and coding scheme or for avoidance of waste of spectrum resources.

摘要翻译： 用于最小化干扰的方法适用于主网络，无论频谱资源是使用块式子载波分配方案还是随机分配方案分配给其用户。 要分配给机会网络的用户的所识别的未使用的频谱资源排除与主网络的用户使用的副载波相邻的未使用的子载波以避免干扰。 机会主义网络可以使用为自适应调制和编码方案选择块大小或避免频谱资源浪费的方案来分配所识别的未使用的频谱资源。

公开(公告)号：US08340060B2

公开(公告)日：2012-12-25

申请号：US12333138

申请日：2008-12-11

申请人： Mustafa Emin Sahin ,  Huseyin Arslan ,  Ismail Guvenc ,  Moo Ryong Jeong

发明人： Mustafa Emin Sahin ,  Huseyin Arslan ,  Ismail Guvenc ,  Moo Ryong Jeong

IPC分类号： H04W4/00

CPC分类号： H04W72/082 ,  H04L5/0007 ,  H04L5/0033 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0062 ,  H04L5/0092 ,  H04W16/32 ,  H04W72/0426 ,  H04W84/045

摘要： A femtocell increases efficiency and coverage of a macrocellular network operating in a co-channel manner within the macrocell spectrum by selecting subcarriers for its mobile station using both the subcarrier allocation map received from the macrocell and a spectrum sensing operation. Interference is avoided by selecting only subcarriers not allocated by the macrocell and subcarriers allocated to users not nearby to the femtocell. Interference is eliminated from the received signals using co-channel interference avoidance techniques. Selection of subcarriers for femtocell use may take into consideration inter-carrier interference detected.

摘要翻译： 毫微微小区通过使用从宏小区接收的副载波分配图和频谱感测操作来选择用于其移动台的子载波来增加在宏小区频谱内以同信道方式工作的宏蜂窝网络的效率和覆盖。 通过仅选择未由宏小区分配的子载波和分配给不在毫微微小区附近的用户的子载波来避免干扰。 使用同信道干扰避免技术从接收到的信号中消除干扰。 毫微微小区使用的子载波的选择可以考虑检测到的载波间干扰。

公开(公告)号：US08340038B2

公开(公告)日：2012-12-25

申请号：US12683263

申请日：2010-01-06

申请人： Ismail Guvenc

发明人： Ismail Guvenc

IPC分类号： H04W4/00 ,  H04J3/06 ,  H04B1/00 ,  H04Q7/20

CPC分类号： H04W72/082 ,  H04W52/244 ,  H04W72/1252 ,  H04W84/045

摘要： A femtocell network uses idle resource blocks of a data frame to reduce interference by spreading the resource blocks of the users over the available spectrum. Spreading may be achieved by repeating the transmission using a number of the resource block groups. As a result, (a) more robustness is obtained against interference; (b) transmission power levels may be decreased because of the spreading, resulting in reducing interference between nearby femtocells and between a macrocell and a femtocell. Other methods of spreading such a frequency or time slot hopping may also be used.

摘要翻译： 毫微微小区网络使用数据帧的空闲资源块来通过在可用频谱上扩展用户的资源块来减少干扰。 可以通过使用多个资源块组来重复传输来实现扩展。 结果，（a）抗干扰获得更强的鲁棒性; （b）由于扩展，传输功率电平可能会降低，从而减少附近的毫微微小区之间以及宏小区与毫微微小区之间的干扰。 也可以使用扩频这种频率或时隙跳频的其他方法。

公开(公告)号：US20100177722A1

公开(公告)日：2010-07-15

申请号：US12683263

申请日：2010-01-06

申请人： Ismail Guvenc

发明人： Ismail Guvenc

IPC分类号： H04W72/00 ,  H04B1/00

CPC分类号： H04W72/082 ,  H04W52/244 ,  H04W72/1252 ,  H04W84/045

摘要： A femtocell network uses idle resource blocks of a data frame to reduce interference by spreading the resource blocks of the users over the available spectrum. Spreading may be achieved by repeating the transmission using a number of the resource block groups. As a result, (a) more robustness is obtained against interference; (b) transmission power levels may be decreased because of the spreading, resulting in reducing interference between nearby femtocells and between a macrocell and a femtocell. Other methods of spreading such a frequency or time slot hopping may also be used.

摘要翻译： 毫微微小区网络使用数据帧的空闲资源块来通过在可用频谱上扩展用户的资源块来减少干扰。 可以通过使用多个资源块组来重复传输来实现扩展。 结果，（a）抗干扰获得更强的鲁棒性; （b）由于扩展，传输功率电平可能会降低，从而减少附近的毫微微小区之间以及宏小区与毫微微小区之间的干扰。 也可以使用扩频这种频率或时隙跳频的其他方法。

公开(公告)号：US20100056167A1

公开(公告)日：2010-03-04

申请号：US12501320

申请日：2009-07-10

申请人： Ismail Guvenc

发明人： Ismail Guvenc

IPC分类号： H04W72/04

CPC分类号： H04L5/0007 ,  H04L5/0033 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0062 ,  H04L5/0092 ,  H04W16/14 ,  H04W24/00 ,  H04W72/00 ,  H04W72/0453 ,  H04W72/082 ,  H04W84/045

摘要： A method for an opportunistic network within a coverage area of a primary network includes (a) spectrum-sensing signals from users in the primary network to identify unused spectrum resources in a spectrum shared between the opportunistic network and the primary network; and (b) based on the spectrum resources identified, assigning the identified spectrum resources to be used among the users of the opportunistic network in one or more block sizes determined from expected interference from the users of the primary network. The method is applicable to a primary network whether or not spectrum resources are assigned to its users using a block-wise subcarrier assignment scheme or a randomized allocation scheme. The identified unused spectrum resources that are to be assigned to the users of the opportunistic network exclude un-used subcarriers adjacent to subcarriers used by the users of the primary network to avoid interference. The opportunistic network may assign the identified unused spectrum resources using a scheme that selects a block size for an adaptive modulation and coding scheme or for avoidance of waste of spectrum resources.

摘要翻译： 在主网络的覆盖区域内的机会网络的方法包括：（a）来自主网络中的用户的频谱感测信号，以识别在机会网络和主网络之间共享的频谱中的未使用的频谱资源; 和（b）基于所识别的频谱资源，从由所述主网络的用户的预期干扰确定的一​​个或多个块大小中，分配所述机会网络的用户中所使用的所识别的频谱资源。 该方法适用于主网络，无论频谱资源是使用块式子载波分配方案还是随机分配方案分配给其用户。 要分配给机会网络的用户的所识别的未使用的频谱资源排除与主网络的用户使用的副载波相邻的未使用的子载波以避免干扰。 机会主义网络可以使用为自适应调制和编码方案选择块大小或避免频谱资源浪费的方案来分配所识别的未使用的频谱资源。

公开(公告)号：US20090046792A1

公开(公告)日：2009-02-19

申请号：US12176958

申请日：2008-07-21

申请人： Huilin Xu ,  Chia-Chin Chong ,  Ismail Guvenc

发明人： Huilin Xu ,  Chia-Chin Chong ,  Ismail Guvenc

IPC分类号： H04L27/28

CPC分类号： H04L25/0212 ,  H04B17/336 ,  H04B17/364 ,  H04L5/0007 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/025 ,  H04L27/2601 ,  H04W64/00 ,  Y02D70/142 ,  Y02D70/144

摘要： A time-of-arrival (TOA) estimation method for multi-band orthogonal frequency division multiplexing (MB-OFDM) signals uses a simple equally-spaced channel model to recover the impulse response of the wireless channel, and locates the delay of the first channel path by minimizing the energy leakage from the first channel path. The TOA is estimated based on the delay. Such a method does not require channel information for TOA estimation at the receiver and does not require modification of the receiver structure. The method also avoids a sub-optimal solution known to occur in maximum likelihood (ML) estimation.

摘要翻译： 用于多频带正交频分复用（MB-OFDM）信号的到达时间（TOA）估计方法使用简单的等间隔信道模型来恢复无线信道的脉冲响应，并且定位第一 通过最小化来自第一通道路径的能量泄漏的通道路径。 TOA估计是基于延迟。 这种方法不需要在接收机处进行TOA估计的信道信息，并且不需要修改接收机结构。 该方法还避免了已知发生在最大似然（ML）估计中的次优解。

公开(公告)号：US20080247488A1

公开(公告)日：2008-10-09

申请号：US11930600

申请日：2007-10-31

申请人： Anxin Li ,  Xiangming Li ,  Hidetoshi Kayama ,  Ismail Guvenc ,  Moo Ryong Jeong

发明人： Anxin Li ,  Xiangming Li ,  Hidetoshi Kayama ,  Ismail Guvenc ,  Moo Ryong Jeong

IPC分类号： H04Q7/20

CPC分类号： H04B7/0413 ,  H04B7/024 ,  H04B7/026 ,  H04B7/0404 ,  H04B7/0456 ,  H04B7/0602 ,  H04B7/0669 ,  H04B7/0678 ,  H04B7/0689 ,  H04B7/0691 ,  H04B7/0697 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0048 ,  H04L25/0206 ,  H04L2025/03426 ,  H04W8/24 ,  H04W72/0406

摘要： A method is provided for MIMO uplink communications between a base station and a wireless station with more than two antennae. The method includes: (a) negotiating between the base station and the wireless station uplink MIMO/cooperative MIMO capabilities, using a message exchange protocol in which a message exchanged comprises a field for specifying uplink MIMO/cooperative MIMO capabilities; (b) the base station receiving a request from the wireless station for data transmission; (c) the base station sending the wireless station an allocated resource and an uplink MIMO/cooperative MIMO method for uplink transmission; (e) the wireless station mapping data symbols to the allocated resource with proper pilot pattern; and (f) the base station detecting the data symbols from the channel.

摘要翻译： 提供了一种用于具有两个以上天线的基站与无线站之间的MIMO上行链路通信的方法。 该方法包括：（a）使用消息交换协议在基站和无线站上行MIMO /协作MIMO能力之间进行协商，其中交换的消息包括用于指定上行MIMO /协作MIMO能力的字段; （b）基站接收来自无线站的数据传输请求; （c）基站向无线站发送分配的资源和用于上行链路传输的上行MIMO /协作MIMO方法; （e）无线站将数据符号以适当的导频模式映射到所分配的资源; 和（f）基站从信道检测数据符号。