公开(公告)号：US20050271012A1

公开(公告)日：2005-12-08

申请号：US10969158

申请日：2004-10-20

申请人： Avneesh Agrawal ,  Edward Teague ,  Tingfang Ji

发明人： Avneesh Agrawal ,  Edward Teague ,  Tingfang Ji

IPC分类号： H04W36/06 ,  H04W36/18 ,  H04B1/00 ,  H04B15/00 ,  H04J3/16 ,  H04J3/22 ,  H04L12/28 ,  H04Q7/00

CPC分类号： H04W36/18 ,  H04W36/06

摘要： For soft handoff on the reverse link with restrictive reuse, a wireless terminal searches for pilots transmitted by sectors in a wireless system, measures the detected pilots, selects a serving sector (e.g., the strongest received sector), and identifies non-serving sectors that may receive high interference from the terminal. The serving sector assigns the terminal with subband(s) that are usable by the serving sector and unusable by the non-serving sectors. The terminal transmits data symbols on the assigned subbands to the serving and non-serving sectors. These sectors process the reverse link transmission from the terminal and obtain soft-decision symbols, which are estimates of the transmitted data symbols. The soft-decision symbols from co-located sectors may be combined and then decoded to obtain decoded packets. The sectors may also independently decode the soft-decision symbols, and the decoded packets from these sectors may be combined to obtain final decoded packets for the terminal.

摘要翻译： 对于具有限制性重用的反向链路上的软切换，无线终端搜索无线系统中的扇区传输的导频，测量检测到的导频，选择服务扇区（例如，最强的接收扇区），并识别非服务扇区 可能会受到来自终端的高干扰。 服务扇区为终端分配可由服务扇区使用且不能由非服务扇区使用的子带。 终端在分配的子带上发送数据符号给服务扇区和非服务扇区。 这些扇区处理来自终端的反向链路传输，并获得作为发送数据符号的估计的软判决符号。 可以组合来自同位置扇区的软判决符号，然后对其进行解码以获得解码的分组。 这些扇区还可以独立地解码软判决符号，并且可以组合来自这些扇区的解码分组以获得终端的最终解码分组。

公开(公告)号：US20050096062A1

公开(公告)日：2005-05-05

申请号：US10871084

申请日：2004-06-18

申请人： Tingfang Ji ,  Avneesh Agrawal ,  Edward Teague

发明人： Tingfang Ji ,  Avneesh Agrawal ,  Edward Teague

IPC分类号： H04W16/10 ,  H04W16/02 ,  H04W16/12 ,  H04W72/08 ,  H04Q7/20

CPC分类号： H04W16/12 ,  H04W16/02 ,  H04W72/0453 ,  H04W72/082

摘要： For restrictive reuse, each cell (or each sector) is assigned (1) a set of usable subbands that may be allocated to users in the cell and (2) a set of forbidden subbands that is not used. The usable and forbidden sets for each cell are orthogonal to one other. The usable set for each cell also overlaps the forbidden set for each neighboring cell. A user u in a cell x may be allocated subbands in the usable set for that cell. If user u observes/causes high level of interference from/to a neighboring cell y, then user u may be allocated subbands from a “restricted” set containing subbands included in both the usable set for cell x and the forbidden set for cell y. User u would then observe/cause no interference from/to cell y. The subband restriction may be extended to avoid interference from multiple neighboring cells.

摘要翻译： 对于限制性重用，分配每个小区（或每个扇区）（1）可以分配给小区中的用户的一组可用子带，以及（2）未使用的一组禁止子带。 每个单元的可用和禁止的集合彼此正交。 每个单元的可用集合也与每个相邻单元的禁止集重叠。 小区x中的用户u可以被分配给该小区的可用集合中的子带。 如果用户u观察到/来自相邻小区y的高水平的干扰，则可以从包含小区x的可用集合和小区y的禁止集合的包含子带的“受限制”集合中分配用户u的子带。 用户u然后将观察/不造成来自/到小区y的干扰。 可以扩展子带限制以避免来自多个相邻小区的干扰。

公开(公告)号：US20050096061A1

公开(公告)日：2005-05-05

申请号：US10858870

申请日：2004-06-01

申请人： Tingfang Ji ,  Avneesh Agrawal ,  Gavin Horn ,  Edward Teague

发明人： Tingfang Ji ,  Avneesh Agrawal ,  Gavin Horn ,  Edward Teague

IPC分类号： H04W16/02 ,  H04W16/12 ,  H04Q7/20

CPC分类号： H04W16/02 ,  H04W16/12 ,  H04W72/048 ,  H04W72/085

摘要： To reduce inter-sector interference for “weak” users and combat a potentially large variation in interference levels observed by “strong” and weak users, system resources (e.g., frequency subbands) available for data transmission in a system are partitioned into multiple (e.g., three) disjoint sets. Each sector in the system is assigned one subband set. Neighboring sectors are assigned different subband sets such that the subband set assigned to each sector is orthogonal to the subband sets assigned to neighboring sectors. Each sector has an assigned subband set and an unassigned subband set, which contains all subbands not in the assigned set. Weak users in each sector (which are typically strong interferers to neighboring sectors) are allocated subbands in the assigned set. Strong users in each sector are allocated subbands in the unassigned set. The weak users in each sector are then orthogonal to strong interferers in neighboring sectors.

摘要翻译： 为了减少“弱”用户的扇区间干扰，并且打击“强”和弱用户观察到的干扰水平的潜在巨大变化，可用于系统中的数据传输的系统资源（例如，频率子带）被划分为多个（例如， ，三）不相交的集合。 系统中的每个扇区被分配一个子带集。 分配相邻扇区的不同子带组，使得分配给每个扇区的子带集与分配给相邻扇区的子带集正交。 每个扇区具有分配的子带集和未分配的子带集合，其包含不在分配集合中的所有子带。 每个扇区（通常是相邻扇区的强干扰源）中的弱用户在分配集中被分配子带。 每个扇区中的强用户在未分配的集合中分配子带。 每个扇区中的弱用户然后与相邻扇区中的强干扰源正交。

公开(公告)号：US20060135080A1

公开(公告)日：2006-06-22

申请号：US11021697

申请日：2004-12-22

申请人： Aamod Khandekar ,  Avneesh Agrawal ,  Arak Sutivong ,  Edward Teague

发明人： Aamod Khandekar ,  Avneesh Agrawal ,  Arak Sutivong ,  Edward Teague

IPC分类号： H04B17/00 ,  H04B1/00 ,  H04Q7/20 ,  H04B7/00

CPC分类号： H04W52/241 ,  H04L1/0001 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/0066 ,  H04L1/20 ,  H04L1/206 ,  H04W52/24

摘要： Techniques for utilizing a capacity-based effective signal-to-noise ratio (SNR) to improve wireless communication are described herein. In an embodiment, a mobile terminal can determine the effective SNR from a forward link channel using pilot/data symbols. The mobile terminal can convey the effective SNR to a base station. In order to minimize transmission overhead, the mobile terminal can quantize the effective SNR prior to transmitting it to the base station. In another embodiment, the base station can determine the effective SNR from a reverse link. The base station can utilize the effective SNR to facilitate scheduling transmissions from the mobile terminal, transmitting power control commands to the mobile terminal, and determining a supporting data rate for the mobile terminal, for example. Suitable SNRs include constrained, unconstrained, average, and/or approximated effective SNRs. In addition, various filters, such as an averaging filter, can be utilized to further process the effective SNR.

公开(公告)号：US20110255518A9

公开(公告)日：2011-10-20

申请号：US11370639

申请日：2006-03-07

申请人： Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov ,  Edward Teague

发明人： Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov ,  Edward Teague

IPC分类号： H04B7/216

CPC分类号： H04W72/042 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0096 ,  H04W72/0486

摘要： Systems and methodologies are described that facilitate dynamically supplementing or decrementing resource assignments to mobile devices in a wireless network environment without requiring transmission of replacement assignments. Supplemental assignments can be generated based on information related to mobile device need and resource availability. Moreover, resource assignments can be persisted for a mobile device.

摘要翻译： 描述了促进在无线网络环境中动态地补充或递减对移动设备的资源分配的系统和方法，而不需要传输替换分配。 可以根据与移动设备需求和资源可用性相关的信息生成补充分配。 此外，可以为移动设备持续资源分配。

公开(公告)号：US20070211790A1

公开(公告)日：2007-09-13

申请号：US11614470

申请日：2006-12-21

申请人： Avneesh Agrawal ,  Edward Teague

发明人： Avneesh Agrawal ,  Edward Teague

IPC分类号： H04B1/00

CPC分类号： H04L27/2613 ,  H04B1/713 ,  H04B2201/70701 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0041 ,  H04L5/0051 ,  H04L25/0232 ,  H04L25/03866 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03509 ,  H04L2025/03789

摘要： Techniques are provided to support fast frequency hopping with a code division multiplexed (CDM) pilot in a multi-carrier communication system (e.g., an OFDMA system). Each transmitter (e.g., each terminal) in the system transmits a wideband pilot on all subbands to allow a receiver (e.g., a base station) to estimate the entire channel response at the same time. The wideband pilot for each transmitter may be generated using direct sequence spread spectrum processing and based on a pseudo-random number (PN) code assigned to that transmitter. This allows the receiver to individually identify and recover multiple wideband pilots transmitted concurrently by multiple transmitters. For a time division multiplexed (TDM)/CDM pilot transmission scheme, each transmitter transmits the wideband pilot in bursts. For a continuous CDM pilot transmission scheme, each transmitter continuously transmits the wideband pilot, albeit at a low transmit power level. Any frequency hopping rate may be supported without impacting pilot overhead.

摘要翻译： 提供技术以在多载波通信系统（例如，OFDMA系统）中用码分多路复用（CDM）导频来支持快速跳频。 系统中的每个发射机（例如，每个终端）在所有子带上发送宽带导频，以允许接收机（例如，基站）同时估计整个信道响应。 可以使用直接序列扩频处理并基于分配给该发射机的伪随机数（PN）码来生成每个发射机的宽带导频。 这允许接收机单独地识别和恢复由多个发射机同时传输的多个宽带导频。 对于时分复用（TDM）/ CDM导频传输方案，每个发射机以突发方式发送宽带导频。 对于连续的CDM导频传输方案，每个发射机连续发射宽带导频，尽管传输功率水平较低。 可以支持任何跳频率，而不会影响导频开销。

公开(公告)号：US20070211668A1

公开(公告)日：2007-09-13

申请号：US11370639

申请日：2006-03-07

申请人： Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov ,  Edward Teague

发明人： Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov ,  Edward Teague

IPC分类号： H04B7/216

CPC分类号： H04W72/042 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0096 ,  H04W72/0486

摘要： Systems and methodologies are described that facilitate dynamically supplementing or decrementing resource assignments to mobile devices in a wireless network environment without requiring transmission of replacement assignments. Supplemental assignments can be generated based on information related to mobile device need and resource availability. Moreover, resource assignments can be persisted for a mobile device.

摘要翻译： 描述了促进在无线网络环境中动态地补充或递减对移动设备的资源分配的系统和方法，而不需要传输替换分配。 可以根据与移动设备需求和资源可用性相关的信息生成补充分配。 此外，可以为移动设备持续资源分配。

公开(公告)号：US20070097908A1

公开(公告)日：2007-05-03

申请号：US11261805

申请日：2005-10-27

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Rajiv Vijayan ,  Edward Teague ,  Fatih Ulupinar

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Rajiv Vijayan ,  Edward Teague ,  Fatih Ulupinar

IPC分类号： H04Q7/00 ,  H04B7/216

CPC分类号： H04L5/023 ,  H04L27/2602 ,  H04W48/12

摘要： To support mobile stations that are not capable of demodulating the entire bandwidth or that can be made to demodulate less than the entire bandwidth, a system, apparatus and method are provided to schedule users on less than all of the bandwidth. Further, certain users can be scheduled on more of the bandwidth than others.

公开(公告)号：US20060286996A1

公开(公告)日：2006-12-21

申请号：US11453438

申请日：2006-06-14

申请人： David Julian ,  Avneesh Agrawal ,  Edward Teague

发明人： David Julian ,  Avneesh Agrawal ,  Edward Teague

IPC分类号： H04B7/00

CPC分类号： H04W48/20 ,  H04B7/022 ,  H04B17/24 ,  H04W52/0235 ,  H04W52/146 ,  H04W52/225 ,  H04W52/40 ,  H04W74/0866 ,  Y02D70/1222 ,  Y02D70/442

摘要： Techniques for selecting a reverse link (RL) serving base station for a terminal are described. The terminal sends a transmission on the reverse link to multiple base stations in a wireless communication system. The transmission may be for signaling sent on a control channel. The terminal receives feedback (e.g., power control (PC) commands and/or erasure indications) from the multiple base stations. Each base station may generate feedback based on the control channel and/or some other transmission received from the terminal. The terminal performs reverse link power control and further selects an RL serving base station based on the received feedback. For example, the terminal may select the base station with the lowest transmit power level, the largest percentage of power down commands, or the lowest erasure rate as the RL serving base station.

摘要翻译： 描述用于选择用于终端的反向链路（RL）服务基站的技术。 终端在无线通信系统中将反向链路上的传输发送到多个基站。 传输可以用于在控制信道上发送的信令。 终端从多个基站接收反馈（例如功率控制（PC）命令和/或擦除指示）。 每个基站可以基于从终端接收的控制信道和/或一些其他传输来产生反馈。 终端执行反向链路功率控制，并且基于接收到的反馈进一步选择RL服务基站。 例如，终端可以选择具有最低发射功率电平的基站，掉电命令的最大百分比或作为RL服务基站的最低擦除率的基站。

公开(公告)号：US20060072604A1

公开(公告)日：2006-04-06

申请号：US11129636

申请日：2005-05-13

申请人： Arak Sutivong ,  Avneesh Agrawal ,  Alexei Gorokhov ,  Edward Teague

发明人： Arak Sutivong ,  Avneesh Agrawal ,  Alexei Gorokhov ,  Edward Teague

IPC分类号： H04J3/16

CPC分类号： H04W74/04 ,  H04W74/002

摘要： Pilots are transmitted on demand on a reverse link and used for channel estimation and data transmission on a forward link. A base station selects at least one terminal for on-demand pilot transmission on the reverse link. Each selected terminal is a candidate for receiving data transmission on the forward link. The base station assigns each selected terminal with a time-frequency allocation, which may be for a wideband pilot, a narrowband pilot, or some other type of pilot. The base station receives and processes on-demand pilot transmission from each selected terminal and derives a channel estimate for the terminal based on the received pilot transmission. The base station may schedule terminals for data transmission on the forward link based on the channel estimates for all selected terminals. The base station may also process data (e.g., perform beamforming or eigensteering) for transmission to each scheduled terminal based on its channel estimate.

摘要翻译： 飞行员根据需要在反向链路上传输，用于前向链路上的信道估计和数据传输。 基站在反向链路上选择至少一个用于按需导频发送的终端。 每个选择的终端是用于在前向链路上接收数据传输的候选者。 基站为每个选择的终端分配时间频率分配，其可以用于宽带导频，窄带导频或某种其他类型的导频。 基站从每个所选终端接收并处理按需导频传输，并根据接收到的导频传输导出终端的信道估计。 基站可以基于所有选择的终端的信道估计来安排在前向链路上进行数据传输的终端。 基站还可以基于其信道估计来处理数据（例如，执行波束成形或本征导向）以传输到每个调度的终端。