公开(公告)号：US08107565B2

公开(公告)日：2012-01-31

申请号：US12360907

申请日：2009-01-28

申请人： Junyi Li ,  Vladimir Parizhsky ,  Frank A. Lane ,  Aleksandar Jovicic ,  Ying Wang

发明人： Junyi Li ,  Vladimir Parizhsky ,  Frank A. Lane ,  Aleksandar Jovicic ,  Ying Wang

IPC分类号： H04L27/08

CPC分类号： H04L27/2647 ,  H03G3/3078

摘要： Techniques for performing automatic gain control (AGC) at a receiver are described. The receiver may receive an OFDM-based symbol composed of a cyclic prefix and a useful portion. The receiver may scale the OFDM-based symbol with an initial receiver gain, adjust the initial receiver gain based on the cyclic prefix, apply the adjusted receiver gain prior to the useful portion, and process the useful portion to recover at least one signal sent by at least one transmitter. The receiver may select the initial receiver gain, e.g., based on a predicted received power level for the at least one transmitter, a pattern of different receiver gains, etc. The receiver may apply the initial receiver gain at the start of the OFDM-based symbol. The receiver may measure the power of a set of samples in the cyclic prefix and may adjust the receiver gain based on the measured power and a target power.

摘要翻译： 描述了在接收机处执行自动增益控制（AGC）的技术。 接收机可以接收由循环前缀和有用部分组成的基于OFDM的符号。 接收机可以利用初始接收机增益来缩放基于OFDM的符号，基于循环前缀调整初始接收机增益，在有用部分之前应用经调整的接收机增益，并处理有用部分以恢复至少一个由 至少一个发射机。 接收机可以例如基于至少一个发射机的预测接收功率电平，不同接收机增益的模式等来选择初始接收机增益。接收机可以在基于OFDM的开始处应用初始接收机增益 符号。 接收机可以测量循环前缀中的一组样本的功率，并且可以基于测量的功率和目标功率来调整接收机增益。

公开(公告)号：US07941173B2

公开(公告)日：2011-05-10

申请号：US11251103

申请日：2005-10-14

申请人： Rajiv Laroia ,  Vladimir Parizhsky ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Vladimir Parizhsky ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04L7/08 ,  H04B1/40 ,  H04L27/2613 ,  H04L27/2655

摘要： Improved beacon signaling methods are described. Beacon signals are transmitted on the same tone in at least two consecutive symbol periods facilitating accurate energy measurements over a symbol period even if timing synchronization with the transmitter is not maintained. A low power wideband signal is also combined with the beacon signal to facilitate channel estimation and other operations such as timing synchronization operations.

摘要翻译： 描述了改进的信标信令方法。 即使与发射机的定时同步不被维持，信标信号在至少两个连续符号周期中以相同的音调发送，从而促进了符号周期的精确能量测量。 低功率宽带信号也与信标信号组合以便于信道估计和诸如定时同步操作的其它操作。

公开(公告)号：US07751448B2

公开(公告)日：2010-07-06

申请号：US10090871

申请日：2002-03-05

申请人： Rajiv Laroia ,  Junyi Li ,  Vladimir Parizhsky

发明人： Rajiv Laroia ,  Junyi Li ,  Vladimir Parizhsky

IPC分类号： H04J3/07 ,  H04L7/00 ,  H04B15/00

CPC分类号： H04W56/0045 ,  H04L5/023 ,  H04L7/0334 ,  H04L27/2646 ,  H04L27/2662 ,  H04W56/0005

摘要： Symbol timing synchronization in OFDM communication systems where multiple wireless terminals communicate with a single base station is described. Base station transmitter and receiver symbol timing is fixed. Each wireless terminal operates to independently adjust its transmitter timing. Transmitter timing synchronization at the wireless terminal is slaved to the terminal's receiver timing synchronization. Each wireless terminal first corrects its receiver symbol timing based on a signal received from the base station. The wireless terminal then adjusts its transmitter symbol timing as a function of its receiver symbol timing. When the receiver symbol timing is to be advanced or delayed by some amount, the transmitter symbol timing is also advanced or delayed, respectively, by the same, or substantially the same, amount. Symbol timing adjustment can be made by adding or deleting digital samples from the first or last symbol in a dwell.

摘要翻译： 描述了多个无线终端与单个基站通信的OFDM通信系统中的符号定时同步。 基站发射机和接收机的符号定时是固定的。 每个无线终端操作以独立地调整其发射机定时。 在无线终端的发射机定时同步被切换到终端的接收机定时同步。 每个无线终端首先基于从基站接收到的信号来校正其接收符号定时。 然后，无线终端根据其接收机符号定时调整其发射机符号定时。 当接收机符号定时被提前或延迟一定量时，发射机符号定时也分别前进或延迟相同或基本相同的量。 符号定时调整可以通过在驻留中从第一个或最后一个符号添加或删除数字样本来进行。

公开(公告)号：US20080014951A1

公开(公告)日：2008-01-17

申请号：US11486810

申请日：2006-07-14

申请人： Rajiv Laroia ,  Vladimir Parizhsky ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Vladimir Parizhsky ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04Q7/20

CPC分类号： H04W72/042 ,  H04W74/04

摘要： Methods and apparatus of efficient communication of resource allocation are described. A base station transmits a resource assignment message, e.g., a state transition message, to a wireless terminal including a first part, e.g., a base station assigned wireless terminal On state identifier, identifying a resource being assigned and a second part, e.g., an ON state mask, identifying a portion of the resource allocated to the wireless terminal. The same resource allocation message information also communicates one of a plurality of different modes of commanded On state operation. The resource allocation message structure supports flexible allocation of available resources facilitating a resource to be partitioned differently at different times accommodating current needs. A predetermined recurring channel structure and association of segments with particular mask bits, facilitates allocated control segments to be used unambiguously without the need to include an overhead wireless terminal identifier field with the control report bits being communicated.

摘要翻译： 描述资源分配高效通信的方法和装置。 基站将资源分配消息（例如，状态转换消息）发送到包括第一部分的无线终端，例如基站分配的无线终端开状态标识符，识别被分配的资源和第二部分，例如， ON状态掩码，识别分配给无线终端的资源的一部分。 相同的资源分配消息信息还传送多个不同模式的命令开状态操作中的一个。 资源分配消息结构支持可用资源的灵活分配，便于在适应当前需求的不同时刻对不同的分区进行分区。 预定的重复频道结构和段与特定屏蔽位的关联有助于分配的控制段被明确使用，而不需要包括传送控制报告位的开销无线终端标识符字段。

公开(公告)号：US20070149227A1

公开(公告)日：2007-06-28

申请号：US11333792

申请日：2006-01-17

申请人： Vladimir Parizhsky ,  Rajiv Laroia ,  Junyi Li ,  Sathyadev Uppala ,  Arnab Das

发明人： Vladimir Parizhsky ,  Rajiv Laroia ,  Junyi Li ,  Sathyadev Uppala ,  Arnab Das

IPC分类号： H04Q7/20 ,  H04B7/00

CPC分类号： H04W72/0453 ,  H04L1/0026 ,  H04L27/2602 ,  H04L47/10 ,  H04W24/02 ,  H04W24/10 ,  H04W28/12 ,  H04W28/18 ,  H04W28/24 ,  H04W72/005 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/1221 ,  H04W72/1236 ,  H04W72/1242 ,  H04W72/1252 ,  H04W72/1284 ,  H04W74/0875

摘要： Wireless terminals and base stations support multiple modes of dedicated control channel operation wherein wireless terminals are allocated different amounts of dedicated uplink resources for reporting control information. A set of dedicated control channel segments is utilized by a wireless terminal to communicate uplink control information reports to its serving base station attachment point. Full tone and split-tone modes of dedicated control channel operation are supported. In full tone mode, a single wireless terminal is allocated each of the dedicated control channel segments associated with a single logical tone. In split tone mode, dedicated control channel segments associated with a single logical tone are allocated between different wireless terminals, with each of the multiple wireless terminals receiving a different non-overlapping subset of the dedicated control channel segments. Logical dedicated control channel tones can be dynamically reallocated for full-tone mode use or split tone mode use.

摘要翻译： 无线终端和基站支持专用控制信道操作的多种模式，其中无线终端被分配不同量的专用上行链路资源用于报告控制信息。 无线终端利用一组专用控制信道段，将上行链路控制信息报告传送到其服务基站附着点。 支持专用控制通道操作的全音和分频模式。 在全音模式下，分配与单个逻辑音调相关联的每个专用控制信道段的单个无线终端。 在分离音模式中，与单个逻辑音调相关联的专用控制信道段在不同的无线终端之间分配，多个无线终端中的每一个接收专用控制信道段的不重叠子集。 可以动态地重新分配逻辑专用控制信道音调以进行全音色模式使用或分离音模式的使用。

公开(公告)号：US07212564B2

公开(公告)日：2007-05-01

申请号：US10174144

申请日：2002-06-18

申请人： Vladimir Parizhsky ,  Junyi Li

发明人： Vladimir Parizhsky ,  Junyi Li

IPC分类号： H04B1/00

CPC分类号： H04W16/12 ,  H04B1/7143 ,  H04L5/0039 ,  H04L5/023 ,  H04W16/02 ,  H04W72/044 ,  H04W72/0453

摘要： Methods and apparatus for allocating tones for communications purposes in adjoining cells of an OFDM system are described. Tones used in each cell are allocated to tone hopping sequences according to a tone to tone hopping sequence allocation function. Different cells use different tone to tone hopping sequence allocation functions to minimize the number of collisions between hopping sequences of neighboring cells. Tone hopping sequence to communications channel allocation functions are used to allocate tone hopping sequences to communications channels. Communications channels are used by wireless terminals, e.g., mobile nodes, to transmit data. Over time, a wireless terminal uses the tones included in the tone hopping sequences corresponding to communications channels it is authorized to use. Accordingly, tones are assigned to communications devices by a multi-function, e.g., two level, mapping operation.

摘要翻译： 描述了用于在OFDM系统的相邻小区中为通信目的分配音调的方法和装置。 每个单元中使用的音调根据音调到音调跳频序列分配功能被分配给音频跳频序列。 不同的小区使用不同的音调到音调跳频序列分配功能来最小化相邻小区的跳频序列之间的冲突次数。 对通信信道分配功能的音频跳频序列用于向通信信道分配音频跳频序列。 无线终端（例如，移动节点）使用通信信道来发送数据。 随着时间的推移，无线终端使用与被授权使用的通信信道相对应的音频跳频序列中包括的音调。 因此，通过多功能，例如两级映射操作，将音调分配给通信设备。

公开(公告)号：US20060083267A1

公开(公告)日：2006-04-20

申请号：US11251103

申请日：2005-10-14

申请人： Rajiv Laroia ,  Vladimir Parizhsky ,  Junyi Li ,  Sathyadev Uppala

发明人： Rajiv Laroia ,  Vladimir Parizhsky ,  Junyi Li ,  Sathyadev Uppala

IPC分类号： H04J3/06

CPC分类号： H04L7/08 ,  H04B1/40 ,  H04L27/2613 ,  H04L27/2655

摘要： Improved beacon signaling methods are described. Beacon signals are transmitted on the same tone in at least two consecutive symbol periods facilitating accurate energy measurements over a symbol period even if timing synchronization with the transmitter is not maintained. A low power wideband signal is also combined with the beacon signal to facilitate channel estimation and other operations such as timing synchronization operations.

摘要翻译： 描述了改进的信标信令方法。 即使与发射机的定时同步不被维持，信标信号在至少两个连续符号周期中以相同的音调发送，从而促进了符号周期的精确能量测量。 低功率宽带信号也与信标信号组合以便于信道估计和诸如定时同步操作的其它操作。

公开(公告)号：US07554977B2

公开(公告)日：2009-06-30

申请号：US10174042

申请日：2002-06-18

申请人： Vladimir Parizhsky ,  Tom Richardson ,  Junyi Li

发明人： Vladimir Parizhsky ,  Tom Richardson ,  Junyi Li

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L29/06 ,  H04L69/324

摘要： Frames including a packet boundary information field indicator and, optionally, packet boundary information field in addition to packet data are described. Methods and apparatus for generating and using such frames are also described. The packet boundary indicator indicates the presence or absence of at least one packet boundary information field in the frame. Frames with a payload that is fully occupied with data corresponding to a single packet do not include a packet boundary information field. The packet boundary information field indicates the location of a corresponding packet boundary and the type of boundary. One packet boundary information field is included in a frame for each boundary separating the data corresponding to different packets. By using packet boundary information fields to specify the location of packet boundaries, the need to parse an entire packet to identify the location of a packet boundary is avoided.

公开(公告)号：US07463669B2

公开(公告)日：2008-12-09

申请号：US11683399

申请日：2007-03-07

申请人： Vladimir Parizhsky ,  Junyi Li

发明人： Vladimir Parizhsky ,  Junyi Li

IPC分类号： H04L27/30

CPC分类号： H04W16/12 ,  H04B1/7143 ,  H04L5/0039 ,  H04L5/023 ,  H04W16/02 ,  H04W72/044 ,  H04W72/0453

摘要： Methods and apparatus for allocating tones for communications purposes in adjoining cells of an OFDM system are described. Tones used in each cell are allocated to tone hopping sequences according to a tone to tone hopping sequence allocation function. Different cells use different tone to tone hopping sequence allocation functions to minimize the number of collisions between hopping sequences of neighboring cells. Tone hopping sequence to communications channel allocation functions are used to allocate tone hopping sequences to communications channels. Communications channels are used by wireless terminals, e.g., mobile nodes, to transmit data. Over time, a wireless terminal uses the tones included in the tone hopping sequences corresponding to communications channels it is authorized to use. Accordingly, tones are assigned to communications devices by a multi-function, e.g., two level, mapping operation.

摘要翻译： 描述了用于在OFDM系统的相邻小区中为通信目的分配音调的方法和装置。 每个单元中使用的音调根据音调到音调跳频序列分配功能被分配给音频跳频序列。 不同的小区使用不同的音调到音调跳频序列分配功能来最小化相邻小区的跳频序列之间的冲突次数。 对通信信道分配功能的音频跳频序列用于向通信信道分配音频跳频序列。 无线终端（例如，移动节点）使用通信信道来发送数据。 随着时间的推移，无线终端使用与被授权使用的通信信道相对应的音频跳频序列中包括的音调。 因此，通过多功能，例如两级映射操作，将音调分配给通信设备。

公开(公告)号：US20060083211A1

公开(公告)日：2006-04-20

申请号：US11247995

申请日：2005-10-11

申请人： Rajiv Laroia ,  Junyi Li ,  Vladimir Parizhsky

发明人： Rajiv Laroia ,  Junyi Li ,  Vladimir Parizhsky

IPC分类号： H04J1/00

CPC分类号： H04L27/2602 ,  H04L5/0042

摘要： More efficient utilization of available bandwidth is implemented in an OFDM wireless communication system. The partitions of bandwidth may be of different sizes and may be different from the original system design parameters. Basic system structure such as the number of tones used and the number of OFDM symbol times in a slot is maintained throughout the system. Bandwidth is varied by adjusting the inter-tone spacing or bandwidth associated with a single tone. As the inter-tone spacing is increased, the OFDM symbol transmission time is decreased following an inverse proportional relationship. A first base station transmitter transmits signals on a first number of tones distributed uniformly in a first frequency band, and a second base station transmitter transmits signals on a second number of tones distributed uniformly in a second frequency band which is wider than the first frequency band, the second number of tones being the same as the first number of tones. The first and second base stations support handoffs of mobile nodes between to each other.