公开(公告)号：US20060223540A1

公开(公告)日：2006-10-05

申请号：US11094933

申请日：2005-03-31

Applicant: Justin Chuang ,  Shailender Timiri

Inventor： Justin Chuang ,  Shailender Timiri

IPC: H04Q7/20

CPC classification number: H04W16/02 ,  H04W16/12

Abstract: A method for radio resource allocation based on planned priority ordering to realize the maximum carrier to interference ratio (C/I) in a cellular system that employs frequency reuse. Reuse of co-channel resources is progressively increased as traffic load increases based on the available spectrum. By using this method, interference rejection at light loading can approach that obtainable by using a low reuse factor. When applied to a wireless packet network, this method allows each resource to carry highest throughput according to the traffic demand and available bandwidth, while making more resources available to carry additional traffic when system loading is increased.

Abstract translation: 一种基于计划优先级排序的无线资源分配方法，用于实现使用频率重用的蜂窝系统中的最大载波干扰比（C / I）。 随着可用频谱的流量负载增加，同频道资源的再利用逐渐增加。 通过使用这种方法，轻负载时的干扰抑制可以通过使用低再利用因子获得。 当应用于无线分组网络时，该方法允许每个资源根据业务需求和可用带宽携带最高吞吐量，同时在增加系统负载时，提供更多的资源来携带额外的流量。

公开(公告)号：US20050286467A1

公开(公告)日：2005-12-29

申请号：US11217045

申请日：2005-09-01

Applicant: Li Chang ,  Kapil Chawla ,  Justin Chuang ,  Bruce McNair ,  Xiaoxin Qiu

Inventor： Li Chang ,  Kapil Chawla ,  Justin Chuang ,  Bruce McNair ,  Xiaoxin Qiu

IPC: H04W16/10 ,  H04W72/08 ,  H04Q7/00

CPC classification number: H04W72/082

Abstract: This invention provides interference predictions, suitable for least interference dynamic channel assignment use or other frequency hopping uses by de-coupling the time slot assignment and the frequency hopping pattern assignment. In particular, a least interfered time slot is selected based on an aggregate interference measurement performed across an entire transmission band or a pre-specified range of frequencies in the transmission band. A user is assigned a least interfered time slot and provided an appropriate frequency hopping pattern.

公开(公告)号：US20060029168A1

公开(公告)日：2006-02-09

申请号：US11240228

申请日：2005-09-30

Applicant: Justin Chuang ,  Lang Lin

Inventor： Justin Chuang ,  Lang Lin

IPC: H04L1/02

CPC classification number: H04L25/0204 ,  H04L27/2647

Abstract: Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A method for estimating channel characteristics in a multicarrier transmission system comprising the steps of receiving a multicarrier signal, applying Fast Fourier transformations to the multicarrier signal, estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using a combination of iterative processing and iterative backward processing, and decoding the transformed multicarrier signal is presented.

公开(公告)号：US20050054296A1

公开(公告)日：2005-03-10

申请号：US10970883

申请日：2004-10-22

Applicant: Justin Chuang ,  Xiaoxin Qiu

Inventor： Justin Chuang ,  Xiaoxin Qiu

IPC: H04B1/00 ,  H04B17/00 ,  H04L1/00

CPC classification number: H04L1/0009 ,  H04L1/0003 ,  H04L1/0021

Abstract: The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission environment model in order to maximize throughput and most efficiently allocate bandwidth resources. The present invention encompasses a refined calculus and methodology for deriving the link adaptation thresholds in a retransmission environment using a complex model and analysis of the retransmission environment. The present invention holds particular application for wireless data communications as opposed to real time data services because it is based on a retransmission model applicable primarily for data services. A critical component of this new link adaptation system is a “no transmission” cutoff mode that is selected for SIR below a base threshold value. This new mode prevents system instability and misallocation of bandwidth in a wireless communication system.

Abstract translation: 本发明实现了一种方法和系统，用于基于重传环境模型动态地适应无线通信网络中的无线电链路的调制和编码方案，以便最大化吞吐量并且最有效地分配带宽资源。 本发明涉及一种用于使用复杂模型和重传环境的分析在重传环境中导出链路自适应阈值的精细微积分和方法。 本发明与实时数据业务相比，具有无线数据通信的特殊应用，因为它基于主要适用于数据业务的重传模型。 该新的链路自适应系统的关键部件是针对低于基本阈值的SIR选择的“无传输”截止模式。 这种新模式可防止无线通信系统中的系统不稳定和带宽分配不均匀。