公开(公告)号：US20090135761A1

公开(公告)日：2009-05-28

申请号：US12260826

申请日：2008-10-29

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Ravi Palanki

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Ravi Palanki

IPC分类号： H04W36/00

CPC分类号： H04W52/244 ,  H04B17/318 ,  H04L1/1854 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0091 ,  H04W72/00 ,  H04W72/12 ,  H04W92/20

摘要： Providing for base station (BS) acquisition in semi-planned or unplanned wireless access networks is described herein. By way of example, a signal preamble can be dynamically allocated to wireless signal resources, such that the preamble is scheduled to different resource(s) across different cycles of the signal. Dynamic allocation can be pseudo-random, based on collision feedback, or determined by a suitable algorithm to mitigate collisions from a dominant interferer. In addition, dynamic scheduling can be particular to a type of BS to significantly reduce collisions from BSs of disparate types. In at least one aspect, a preamble resource can be sub-divided into multiple frequency sub-carrier tiles. Control channel information can be transmitted on each tile of a group of such tiles, further mitigating effects of a dominant interferer on a subset of the tile group.

摘要翻译： 本文描述了在半计划或非计划无线接入网络中提供基站（BS）采集。 作为示例，可以将信号前同步码动态地分配给无线信号资源，使得前导码被调度到跨越信号的不同周期的不同资源。 动态分配可以是伪随机的，基于碰撞反馈，或者由适当的算法确定，以减轻来自主要干扰源的冲突。 此外，动态调度对于一种类型的BS可以是特别的，以显着减少来自不同类型的BS的冲突。 在至少一个方面，前导码资源可以被细分为多个频率子载波瓦片。 可以在一组这样的瓦片的每个瓦片上发送控制信道信息，进一步减轻显着干扰源对瓦片组的子集的影响。

公开(公告)号：US20090129268A1

公开(公告)日：2009-05-21

申请号：US12163818

申请日：2008-06-27

申请人： Dexu Lin ,  Alexei Gorokhov ,  Aamod Khandekar ,  Ravi Palanki

发明人： Dexu Lin ,  Alexei Gorokhov ,  Aamod Khandekar ,  Ravi Palanki

IPC分类号： H04J11/00

CPC分类号： H04W24/02 ,  H04L1/0004 ,  H04L1/0072 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0053 ,  H04W72/04 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

摘要： Systems and methodologies are described that facilitate wireless network transmitters blanking or reducing power on portions of bandwidth reserved for control information transmission. This mitigates interference from disparate transmitters. Furthermore, the control information portion can be divided into a plurality of OFDM tiles that are reusable by transmitters for transmitting the control information. In this regard, interference between transmitters is additionally mitigated as the transmitters can multiplex the control information over a plurality of tiles increasing the chance that at least a portion of the tiles are not interfered. The control information can be decoded by the receivers from the portion of tiles with a low probability of interference.

摘要翻译： 描述了系统和方法，其促进无线网络发射机消隐或减少为控制信息传输预留的带宽部分上的功率。 这减轻了不同发射机的干扰。 此外，控制信息部分可以被划分为多个OFDM瓦片，其可由用于发送控制信息的发射机重用。 在这方面，发射机之间的干扰额外减轻，因为发射机可以在多个瓦片上复用控制信息，从而增加至少一部分瓦片不被干扰的机会。 控制信息可以由来自具有低干扰概率的瓦片部分的接收器解码。

公开(公告)号：US20080240159A1

公开(公告)日：2008-10-02

申请号：US11968631

申请日：2008-01-02

申请人： Ravi Palanki ,  Jeremy H. Lin ,  Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal

发明人： Ravi Palanki ,  Jeremy H. Lin ,  Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal

IPC分类号： H04J3/24

CPC分类号： H04L47/15 ,  H04L47/70

摘要： Techniques for transmitting data in a communication system are described. A packet may be partitioned into multiple subpackets, and each subpacket may be encoded separately. The subpackets may be mapped to resources assigned for transmission of the packet, with at least one subpacket being mapped to a subset of the assigned resources. The assigned resources may include multiple tiles, with each tile corresponding to a block of time frequency resources. The subpackets may be mapped to the tiles such that (i) the subpackets are mapped to equal number of tiles to achieve similar decoding performance, (ii) each subpacket is mapped to at least NMIN tiles, if available, to achieve a certain minimum diversity order for the subpacket, and/or (iii) each subpacket is mapped to a subset of the multiple tiles, if possible, so that the subpacket can be decoded without having to demodulate all of the tiles.

摘要翻译： 描述用于在通信系统中发送数据的技术。 分组可以被划分成多个子分组，并且每个子分组可以被分开编码。 子分组可以被映射到分配用于分组的传输的资源，其中至少一个子分组被映射到所分配的资源的子集。 分配的资源可以包括多个瓦片，其中每个瓦片对应于时间频率资源块。 子分组可以被映射到瓦片，使得（i）子分组被映射到相等数量的分块以实现类似的解码性能，（ii）每个子分组被映射到至少N分钟分块，如果 为了实现子包的一定的最小分集顺序，和/或（iii）每个子包被映射到多个片的子集，如果可能的话，使得子包可被解码而不必解调所有的片。

公开(公告)号：US09125163B2

公开(公告)日：2015-09-01

申请号：US12262576

申请日：2008-10-31

申请人： Ravi Palanki ,  Aamod Khandekar ,  Naga Bhushan

发明人： Ravi Palanki ,  Aamod Khandekar ,  Naga Bhushan

IPC分类号： H04B1/00 ,  H04W52/32 ,  H04W52/24 ,  H04W72/08 ,  H04B7/06 ,  H04W72/04

CPC分类号： H04W74/0816 ,  H04B7/0617 ,  H04L5/0048 ,  H04W52/241 ,  H04W52/325 ,  H04W72/0426 ,  H04W72/046 ,  H04W72/08 ,  H04W72/082 ,  H04W72/14 ,  H04W88/02 ,  H04W88/08

摘要： Techniques for transmitting data with persistent interference mitigation in a wireless communication system are described. A station (e.g., a base station or a terminal) may observe high interference and may send a request to reduce interference to interfering stations. The request may be valid for a time period covering multiple response periods. Each interfering station may grant or dismiss the request in each response period, may dismiss the request by transmitting at full power, and may grant the request by transmitting at lower than full power. The station may receive a response from each interfering station indicating grant or dismissal of the request by that interfering station in each response period. The station may estimate SINR based on the response received from each interfering station and may exchange data with another station based on the estimated SINR. Persistent interference mitigation may reduce signaling overhead and improve resource utilization and performance.

摘要翻译： 描述了在无线通信系统中传输具有持续干扰减轻的数据的技术。 站（例如，基站或终端）可以观察到高干扰，并且可以发送减少对干扰站的干扰的请求。 该请求可以在覆盖多个响应周期的时间段内有效。 每个干扰站可以在每个响应周期中授权或者解除请求，可以通过全功率发射来解除请求，并且可以以低于全功率的方式发送请求。 站点可以从每个干扰站接收指示在每个响应周期中该干扰站的请求的授权或解除的响应。 该站可以基于从每个干扰站接收到的响应估计SINR，并且可以基于估计的SINR与另一个站交换数据。 持续的干扰减轻可以减少信令开销并提高资源利用率和性能。

公开(公告)号：US08918112B2

公开(公告)日：2014-12-23

申请号：US12260861

申请日：2008-10-29

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Ravi Palanki ,  Ashwin Sampath ,  Avneesh Agrawal

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Ravi Palanki ,  Ashwin Sampath ,  Avneesh Agrawal

IPC分类号： H04W72/00 ,  H04W48/08 ,  H04W8/26 ,  H04W36/30 ,  H04W48/16

CPC分类号： H04W48/08 ,  H04W8/26 ,  H04W36/30 ,  H04W48/16

摘要： Providing for management of wireless communications in a heterogeneous wireless access point (AP) environment is described herein. By way of example, system data of an over-the-air message can be configured to include information identifying a distinct type of transmitting base station. In some aspects, the information can include an access type of the base station and/or a sector ID for distinguishing the base station among large numbers of other base stations. According to other aspects, the information can include wireless channel resources designated for a particular type of base station, or blanked by the transmitting base station, to facilitate interference reduction on such resources. By employing aspects of wireless communication management disclosed herein, efficient and reliable communication can be affected in large heterogeneous AP networks.

摘要翻译： 本文描述了在异构无线接入点（AP）环境中的无线通信的管理。 作为示例，空中消息的系统数据可以被配置为包括标识不同类型的发送基站的信息。 在一些方面，信息可以包括基站的接入类型和/或用于区分大量其他基站中的基站的扇区ID。 根据其他方面，信息可以包括为特定类型的基站指定的无线信道资源，或者由发射基站消隐，以便于对这些资源进行干扰减少。 通过采用这里公开的无线通信管理的方面，可以在大型异构AP网络中影响高效可靠的通信。

公开(公告)号：US08825046B2

公开(公告)日：2014-09-02

申请号：US12261998

申请日：2008-10-30

申请人： Mohammad J. Borran ,  Aamod Khandekar ,  Naga Bhushan ,  Ashwin Sampath ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Ravi Palanki ,  Gavin B. Horn

发明人： Mohammad J. Borran ,  Aamod Khandekar ,  Naga Bhushan ,  Ashwin Sampath ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Ravi Palanki ,  Gavin B. Horn

IPC分类号： H04W4/00 ,  H04B7/00

CPC分类号： H04W72/048 ,  H04W52/242 ,  H04W52/243 ,  H04W52/28 ,  H04W52/325 ,  H04W52/34

摘要： Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a serving base station may send a message to a terminal to trigger short-term interference mitigation. In response, the terminal may send a message to request at least one interfering base station to reduce interference on at least one resource. Each interfering base station may determine a transmit power level to be used for the at least one resource and may send a pilot at this transmit power level. The terminal may estimate the channel quality of the at least one resource based on at least one pilot received from the at least one interfering base station. The terminal may send information indicative of the estimated channel quality to the serving base station. The serving base station may send a data transmission on the at least one resource to the terminal.

摘要翻译： 描述了在无线通信系统中发送具有短期干扰抑制的数据的技术。 在一种设计中，服务基站可以向终端发送消息以触发短期干扰减轻。 作为响应，终端可以发送消息以请求至少一个干扰基站以减少对至少一个资源的干扰。 每个干扰基站可以确定要用于至少一个资源的发射功率电平，并且可以以该发射功率电平发送导频。 终端可以基于从至少一个干扰基站接收的至少一个导频来估计至少一个资源的信道质量。 终端可以向服务基站发送表示估计的信道质量的信息。 服务基站可以向终端发送至少一个资源上的数据传输。

公开(公告)号：US08761032B2

公开(公告)日：2014-06-24

申请号：US12163818

申请日：2008-06-27

申请人： Dexu Lin ,  Alexei Gorokhov ,  Aamod Khandekar ,  Ravi Palanki

发明人： Dexu Lin ,  Alexei Gorokhov ,  Aamod Khandekar ,  Ravi Palanki

IPC分类号： H04L12/26 ,  H04W24/02 ,  H04L1/00

CPC分类号： H04W24/02 ,  H04L1/0004 ,  H04L1/0072 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0053 ,  H04W72/04 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

摘要： Systems and methodologies are described that facilitate wireless network transmitters blanking or reducing power on portions of bandwidth reserved for control information transmission. This mitigates interference from disparate transmitters. Furthermore, the control information portion can be divided into a plurality of OFDM tiles that are reusable by transmitters for transmitting the control information. In this regard, interference between transmitters is additionally mitigated as the transmitters can multiplex the control information over a plurality of tiles increasing the chance that at least a portion of the tiles are not interfered. The control information can be decoded by the receivers from the portion of tiles with a low probability of interference.

摘要翻译： 描述了系统和方法，其促进无线网络发射机消隐或减少为控制信息传输预留的带宽部分上的功率。 这减轻了不同发射机的干扰。 此外，控制信息部分可以被划分为多个OFDM瓦片，其可由用于发送控制信息的发射机重用。 在这方面，发射机之间的干扰额外减轻，因为发射机可以在多个瓦片上复用控制信息，从而增加至少一部分瓦片不被干扰的机会。 控制信息可以由来自具有低干扰概率的瓦片部分的接收器解码。

公开(公告)号：US08396013B2

公开(公告)日：2013-03-12

申请号：US11848842

申请日：2007-09-06

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Ravi Palanki

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Ravi Palanki

IPC分类号： H04B1/56

CPC分类号： H04B7/2656

摘要： Systems and methodologies are described that provide support for signal acquisition in wireless communication systems that utilize half-duplex communication in the presence of asynchronous sectors. Forward link and reverse link superframes can be structured such that a given frame position in a superframe alternates between forward link communication and reverse link communication for a particular half-duplex interlace. More particularly, an odd number of frames can be grouped into respective forward link and reverse link superframes, from which frames can be assigned to a first half-duplex interlace and a second half-duplex interlace in an alternating fashion. By varying the communication link used by a half-duplex interlace at a given frame location, terminals operating on a single half-duplex interlace can detect asynchronously operating sectors irrespective of the transmission timeline of such sectors.

摘要翻译： 描述了在存在异步扇区的情况下利用半双工通信的无线通信系统中的信号获取的支持的系统和方法。 可以构造前向链路和反向链路超帧，使得超帧中的给定帧位置在特定半双工交错的前向链路通信和反向链路通信之间交替。 更具体地，奇数帧可以被分组成相应的前向链路和反向链路超帧，从该帧可以以交替的方式将帧分配给第一半双工交错和第二半双工交错。 通过改变在给定帧位置处的半双工交错使用的通信链路，在单个半双工交错上操作的终端可以检测异步操作扇区，而与这些扇区的传输时间线无关。

公开(公告)号：US08305999B2

公开(公告)日：2012-11-06

申请号：US11969200

申请日：2008-01-03

申请人： Ravi Palanki ,  Alexei Gorokhov ,  Aamod Khandekar ,  Naga Bhushan

发明人： Ravi Palanki ,  Alexei Gorokhov ,  Aamod Khandekar ,  Naga Bhushan

IPC分类号： H04B7/216

CPC分类号： H04W72/04 ,  H04B1/692 ,  H04B1/7143 ,  H04L5/0012 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0055 ,  H04L27/0008

摘要： Techniques for allocating and mapping resources in a wireless communication system are described. The system may use hop-ports to facilitate allocation and use of subcarriers. In one aspect, the hop-ports may be partitioned into multiple subzones, with each subzone including a configurable number of hop-ports. The hop-ports within each subzone may be permuted or shuffled based on a permutation function. After permutation, the hop-ports in all subzones may be mapped to the subcarriers based on local or global hopping. In another aspect, a set of hop-ports may be mapped to a set of subcarriers. A hop-port may be mapped to an unavailable subcarrier and may then be remapped to another available subcarrier. In yet another aspect, a set of hop-ports may be mapped to a set of subcarriers distributed (e.g., evenly) across all subcarriers but avoiding subcarriers in a reserved zone.

摘要翻译： 描述了用于在无线通信系统中分配和映射资源的技术。 系统可以使用跳转端口来促进子载波的分配和使用。 在一个方面，跳跃端口可以被划分成多个子区域，每个子区域包括可配置数量的跳接口。 基于置换功能，每个子区域内的跳转口可以被排列或混洗。 在排列之后，所有子区域中的跳跃端口可以基于本地或全局跳频映射到子载波。 在另一方面，一组跳跃端口可以映射到一组子载波。 跳跃端口可以被映射到不可用的子载波，然后可以重新映射到另一个可用的子载波。 在另一方面，一组跳跃端口可以被映射到跨所有子载波分布（例如，均匀）但是避开保留区域中的子载波的一组子载波。

公开(公告)号：US08156390B2

公开(公告)日：2012-04-10

申请号：US12489431

申请日：2009-06-23

申请人： Ravi Palanki ,  Aamod Khandekar

发明人： Ravi Palanki ,  Aamod Khandekar

IPC分类号： G06F11/00 ,  H03M13/03

CPC分类号： H03M13/2789 ,  H03M13/2757 ,  H03M13/276

摘要： A pruned bit-reversal interleaver supports different packet sizes and variable code rates and provides good spreading and puncturing properties. To interleave data, a packet of input data of a first size is received. The packet is extended to a second size that is a power of two, e.g., by appending padding or properly generating write addresses. The extended packet is interleaved in accordance with a bit-reversal interleaver of the second size, which reorders the bits in the extended packet based on their indices. A packet of interleaved data is formed by pruning the output of the bit-reversal interleaver, e.g., by removing the padding or properly generating read addresses. The pruned bit-reversal interleaver may be used in combination with various types of FEC codes such as a Turbo code, a convolutional code, or a low density parity check (LDPC) code.

摘要翻译： 修剪的位反转交错器支持不同的分组大小和可变代码率，并提供良好的扩展和打孔属性。 为了交织数据，接收到第一大小的输入数据的分组。 例如，通过附加填充或适当地生成写入地址，将分组扩展到二次幂的第二大小。 扩展分组根据第二大小的位反转交织器进行交织，根据它们的索引对扩展分组中的比特进行重新排序。 通过例如通过去除填充或适当地生成读取地址来修剪比特反转交织器的输出来形成交织数据的分组。 修剪的位反转交织器可以与诸如Turbo码，卷积码或低密度奇偶校验（LDPC）码的各种类型的FEC码组合使用。