公开(公告)号：US09210716B2

公开(公告)日：2015-12-08

申请号：US14669971

申请日：2015-03-26

Applicant: Broadcom Corporation

Inventor： Louay Jalloul ,  Sriram Mudulodu ,  Sam P. Alex ,  Leena Zacharias ,  Bertrand Hochwald

IPC: H04W72/00 ,  H04W72/08 ,  H04L1/00 ,  H04W24/00 ,  H04W28/18

CPC classification number: H04W72/085 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0021 ,  H04W24/00 ,  H04W28/18

Abstract: A method for managing uplink communication in a wireless communication network is provided. The method includes selecting one or more Mobile Stations (MSs) from a plurality of MSs based on a first signal parameter corresponding to each MS of the one or more MSs, one or more second signal parameters corresponding to each MS of the one or more MSs, and one or more threshold parameters. The first signal parameter is associated with a Base Station (BS) serving a MS. Further, the one or more second signal parameters are associated with one or more BSs neighboring to the MS. The one or more threshold parameters are associated with a communication parameter. Thereafter, the method includes modifying an uplink Modulation and Coding Scheme (MCS) level of the one or more MSs.

Abstract translation: 提供了一种在无线通信网络中管理上行链路通信的方法。 该方法包括基于与一个或多个MS的每个MS对应的第一信号参数从多个MS中选择一个或多个移动站（MS），对应于一个或多个MS的每个MS的一个或多个第二信号参数 ，以及一个或多个阈值参数。 第一信号参数与服务于MS的基站（BS）相关联。 此外，一个或多个第二信号参数与与MS相邻的一个或多个BS相关联。 一个或多个阈值参数与通信参数相关联。 此后，该方法包括修改一个或多个MS的上行链路调制和编码方案（MCS）级别。

公开(公告)号：US09148805B2

公开(公告)日：2015-09-29

申请号：US14274328

申请日：2014-05-09

Applicant: Broadcom Corporation

Inventor： Sam Alex ,  Louay Jalloul

IPC: H04M3/00 ,  H04W24/02 ,  H04W76/04 ,  H04W16/32

CPC classification number: H04W76/048 ,  H04W16/32 ,  H04W24/02 ,  H04W24/10 ,  H04W72/0413 ,  H04W76/28 ,  H04W84/045

Abstract: The present disclosure is directed to a system and method for transitioning small cell base stations out of a discontinuous transmission (DTX) mode. The system and method comprise monitoring at the small cell base stations uplink transmissions from user terminals (UTs) to a macrocell base station while the small cell base stations are in the DTX mode. The small cell base stations can use the monitored uplink transmissions to, for example, measure received power levels from the UTs and/or measure uplink path losses between the small cell base stations and the UTs. The small cell base stations can report these measured values back to the macrocell base station through a backhaul network. Based on these measurements, the macrocell base station can determine which small cell base stations can support which UTs without transitioning the small cell base stations out of the DTX mode.

Abstract translation: 本公开涉及用于从不连续传输（DTX）模式转换小型小区基站的系统和方法。 该系统和方法包括在小型小区基站处于DTX模式时，在小型小区基站上进行从用户终端（UT）到宏小区基站的上行链路传输的监视。 小小区基站可以使用所监视的上行链路传输来例如测量来自UT的接收功率电平和/或测量小小区基站和UT之间的上行链路路径损耗。 小型小区基站可以通过回程网络将这些测量值报告回宏小区基站。 基于这些测量，宏小区基站可以确定哪些小小区基站可以支持哪些UT，而不会将小小区基站转移到DTX模式之外。

公开(公告)号：US09143376B2

公开(公告)日：2015-09-22

申请号：US14018077

申请日：2013-09-04

Applicant: Broadcom Corporation

Inventor： Louay Jalloul ,  Mohammad Mansour ,  Sam Alex

IPC: H04L27/26

CPC classification number: H04L27/2649 ,  H04L1/0006 ,  H04L1/0026 ,  H04L1/0045 ,  H04L27/2647

Abstract: Systems and methods are provided for efficient tree-based detection of multi-carrier modulated signals, such as Orthogonal Frequency Division Multiplexing (OFDM) symbols. In an embodiment, a plurality of signals occupying respective tones are received and processed to determine an order, based on a tone quality metric, for the plurality of signals. The plurality of signals are then dispatched to a pool of tree detectors in accordance with the order. In an embodiment, the order ensures that signals occupying higher quality tones, and requiring shorter detection times, are dispatched first to the pool of tree detectors. In another embodiment, a maximum runtime of busy tree detectors of the pool is updated based signal on actual detection times to exploit the time slack of early terminating detectors.

Abstract translation: 提供了用于多载波调制信号（例如正交频分复用（OFDM））符号的有效的基于树的检测的系统和方法。 在一个实施例中，接收并处理占据各个音调的多个信号，以便根据多个信号的音质度量度确定一个顺序。 然后根据顺序将多个信号分派到树检测器池。 在一个实施例中，该顺序确保将占据更高质量音调并且需要更短检测时间的信号首先发送到树检测器池。 在另一个实施例中，池的繁忙树检测器的最大运行时间是基于实际检测时间的基于信号的信号，以利用早期终止检测器的时间松弛。

公开(公告)号：US09143364B2

公开(公告)日：2015-09-22

申请号：US14050922

申请日：2013-10-10

Applicant: Broadcom Corporation

Inventor： Ahmad Mohammed ,  Louay Jalloul

IPC: H04L25/02 ,  H04L1/20

CPC classification number: H04L25/0204 ,  H04L1/206 ,  H04L25/022 ,  H04L25/023

Abstract: The present disclosure is described in the exemplary context of a Long Term Evolution (LTE) cellular network and is directed to a method and apparatus for estimating a gain and phase imbalance between an in-phase path and a quadrature path of a receiver operating in such a network. The method and apparatus specifically exploit channel coherence in time and frequency, and the properties of the Primary Synchronization Signal (PSS), and/or the Secondary Synchronization Signal (SSS), and/or information in the Physical Broadcast Channel (PBCH), all of which are defined by the LTE standard, to estimate the gain and phase imbalance of the receiver while it remains connected to a base station to receive data.

Abstract translation: 本公开在长期演进（LTE）蜂窝网络的示例性上下文中描述，并且涉及用于估计在这样的操作中的接收机的同相路径和正交路径之间的增益和相位不平衡的方法和装置 一个网络。 专门利用时间和频率的信道一致性以及主同步信号（PSS）和/或次同步信号（SSS）的属性和/或物理广播信道（PBCH）中的信息的方法和装置，全部 其被LTE标准定义，以在接收机保持连接到基站以接收数据的同时估计接收机的增益和相位不平衡。

公开(公告)号：US20150163073A1

公开(公告)日：2015-06-11

申请号：US14142654

申请日：2013-12-27

Applicant: Broadcom Corporation

Inventor： Nihar Jindal ,  Arogyaswami Paulraj ,  Louay Jalloul ,  Sam Alex ,  Amin Mobasher

IPC: H04L25/02 ,  H04B7/04

CPC classification number: H04L25/0204 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04L25/0228 ,  H04L25/025

Abstract: In an embodiment, a method of channel estimation is provided. The method includes determining a parametric model for a channel between a first transceiver and a second transceiver and transmitting a pilot signal to the second transceiver. The receiving transceiver is configured to determine a parameter of the parametric model based at least on the pilot signal and to estimate a channel transfer function coefficient for the channel based on the parameter and the parametric model.

Abstract translation: 在一个实施例中，提供了一种信道估计的方法。 该方法包括确定第一收发器和第二收发器之间的信道的参数模型，并将导频信号发送到第二收发器。 接收收发器被配置为至少基于导频信号来确定参数模型的参数，并且基于参数和参数模型来估计信道的信道传递函数系数。

公开(公告)号：US20150162959A1

公开(公告)日：2015-06-11

申请号：US14142581

申请日：2013-12-27

Applicant: Broadcom Corporation

Inventor： Nihar JINDAL ,  Murat Mese ,  Arogyaswami Paulraj ,  Louay Jalloul ,  Amin Mobasher ,  Sam Alex

IPC: H04B7/04 ,  H04W36/26 ,  H04W72/04 ,  H04W16/14

CPC classification number: H04B7/0413 ,  H04B7/024 ,  H04B7/0617 ,  H04W16/28 ,  H04W72/046

Abstract: In wireless operating environments, wireless user devices are often within the coverage area of multiple base stations. The base station providing the best uplink for the user device may be different than the base station providing the best downlink for the user device. Systems and techniques for asymmetric uplink and downlink communications for a user device are provided. In embodiments, the user device initially synchronizes with a base station. Both the uplink and downlink are initially served by this base station. A determination is then made whether to handoff the downlink for the user device to another base station. When a determination is indicated, the downlink is handed off to the second base station. Thereafter, periodic measurements are made. The determinations whether to handoff the uplink and downlink for the user device are made independently.

Abstract translation: 在无线操作环境中，无线用户设备通常在多个基站的覆盖区域内。 为用户设备提供最佳上行链路的基站可以不同于为用户设备提供最佳下行链路的基站。 提供了用于用户设备的用于不对称上行链路和下行链路通信的系统和技术。 在实施例中，用户设备最初与基站同步。 上行链路和下行链路两者最初由该基站服务。 然后确定是否将用户设备的下行链路切换到另一个基站。 当指示确定时，下行链路被切换到第二基站。 此后，进行周期测量。 决定是否切换用户设备的上行链路和下行链路是独立进行的。

公开(公告)号：US20140211670A1

公开(公告)日：2014-07-31

申请号：US14148582

申请日：2014-01-06

Applicant: Broadcom Corporation

Inventor： Sam P. Alex ,  Amin Mobasher ,  Louay Jalloul

IPC: H04W56/00 ,  H04L5/14

CPC classification number: H04L5/14 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0082 ,  H04L5/1438 ,  H04L5/1469 ,  H04W56/0015

Abstract: Provided are various implementations of a wireless network synchronization solution. In one implementation, such a solution includes a mobile communication device including a receiver for use with the wireless network. The receiver is configured to receive a downlink communication from the wireless network, to detect a primary synchronization signal (PSS) at a PSS subframe symbol of the downlink communication, and to detect a secondary synchronization signal (SSS) at an SSS subframe symbol of the downlink communication. The receiver is further configured to identify the downlink communication as being duplexed using one of a first duplexing mode and a second duplexing mode when the PSS subframe symbol follows the SSS subframe symbol, and to identify the downlink communication as being duplexed using the other of the first duplexing mode and the second duplexing mode when the PSS subframe symbol precedes the SSS subframe symbol.

Abstract translation: 提供了无线网络同步解决方案的各种实施方式。 在一个实现中，这样的解决方案包括包括用于无线网络的接收器的移动通信设备。 所述接收机被配置为从所述无线网络接收下行链路通信，以检测所述下行链路通信的PSS子帧符号处的主同步信号（PSS），并且检测所述下行链路通信的SSS子帧符号处的辅同步信号（SSS） 下行通信。 接收机还被配置为当PSS子帧符号遵循SSS子帧符号时，使用第一双工模式和第二双工模式之一来将下行链路通信识别为双工，并且使用另一个 当PSS子帧符号在SSS子帧符号之前时，第一双工模式和第二双工模式。

公开(公告)号：US20140140317A1

公开(公告)日：2014-05-22

申请号：US13838317

申请日：2013-03-15

Applicant: BROADCOM CORPORATION

Inventor： Amin Mobasher ,  Louay Jalloul

IPC: H04W72/08

CPC classification number: H04B7/024 ,  H04B7/0639 ,  H04J11/0033

Abstract: An interference suppression (IS) time/frequency zone for improved interference suppression at the user equipment (UE) is provided. The IS time/frequency zone can be scheduled and set up using existing signaling of the Almost Blank Subframe (ABS) framework. This includes using the existing signaling of the ABS framework to schedule the IS time/frequency zone, coordinate transmission parameters among base stations for the IS time/frequency zone, and signal the IS time/frequency zone to the UE. In another aspect, interfering base stations align respective reference signals during the IS time/frequency zone, which allows the UE to measure the channels from its serving base station and/or the interfering base stations(s). With channel state information knowledge at the UE, interference alignment can be achieved at the UE during the IS time/frequency zone.

Abstract translation: 提供用于在用户设备（UE）处改善干扰抑制的干扰抑制（IS）时间/频率区域。 可以使用“近似空白子帧（ABS）”框架的现有信号调度和设置IS时间/频率区域。 这包括使用ABS框架的现有信令调度IS时间/频率区域，在IS时间/频率区域的基站之间协调传输参数，并向IS发送IS时间/频率区域。 在另一方面，干扰基站在IS时间/频率区域期间对准各个参考信号，这允许UE从其服务基站和/或干扰基站测量信道。 利用UE处的信道状态信息知识，可以在IS时间/频率区域期间在UE处实现干扰对准。

公开(公告)号：US20130294367A1

公开(公告)日：2013-11-07

申请号：US13886955

申请日：2013-05-03

Applicant: BROADCOM CORPORATION

Inventor： Louay Jalloul ,  Djordje Tujkovic ,  Ahmad Mohammed

IPC: H04W72/08

CPC classification number: H04W72/082 ,  H04B7/024 ,  H04B17/16 ,  H04L1/0077 ,  H04L1/1819 ,  H04L1/1874

Abstract: Embodiments enable cooperative transmissions from a group of cells (can include the serving cell and one or more neighboring cells) to a user equipment (UE). The cooperative transmissions emulate Hybrid Automatic Repeat Request (HARQ) transmissions to the UE. Specifically, when the UE is experiencing high interference, the UE's serving cell can create a transmit incremental redundancy (IR) group for the UE, which is used to transmit information in a HARQ-like fashion to the UE. Because interference is reduced, the UE can decode the information at a lower coding rate and higher coding gain.

Abstract translation: 实施例使得能够向用户设备（UE）提供来自一组小区（可以包括服务小区和一个或多个相邻小区）的协作传输。 协作传输模拟对UE的混合自动重传请求（HARQ）传输。 具体地，当UE正在经历高干扰时，UE的服务小区可以创建用于UE的发射增量冗余（IR）组，其用于以类似HARQ的方式向UE发送信息。 由于干扰减少，所以UE可以以较低的编码率和更高的编码增益对信息进行解码。