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    • 3. 发明申请
    • METHOD AND APPARATUS FOR SPECTRALLY EFFICIENT LINK ADAPTATION USING HARQ IN OFDMA SYSTEMS
    • 在OFDMA系统中使用HARQ的频谱效率链路适配的方法和装置
    • WO2009134747A1
    • 2009-11-05
    • PCT/US2009/041899
    • 2009-04-28
    • NORTEL NETWORKS LIMITEDNAMMI, SairameshVENKATRAMAN, ShankarCHHEDA, Ashvin
    • NAMMI, SairameshVENKATRAMAN, ShankarCHHEDA, Ashvin
    • H04L12/26
    • H04W72/04H04B7/024H04B7/0452H04J11/005H04L5/0023H04L5/0037
    • A method increases spectral efficiency in a communication system. The communication system includes at least one mobile station and is capable of transmitting messages encoded according to a plurality of available modulation coding schemes ("MCSs"). Each available MCS includes a modulation scheme and an effective coding rate. The MCSs are indexed according to increasing complexity. A signal-to-interference ratio ("SINR") is determined which is sufficient to satisfy a predetermined frame error rate ("FER"). A first MCS and a corresponding amount of transmissions needed to satisfy the predetermined FER at the SINR using the first MCS are determined. The first MCS has a higher effective coding rate than a second MCS. The second MCS sufficiently satisfies the predetermined FER at the SINR in a single transmission. A message encoded according to the first MCS is transmitted through the communication system using hybrid automatic repeat request ("HARQ")
    • 一种方法提高了通信系统中的频谱效率。 通信系统包括至少一个移动站,并且能够发送根据多个可用调制编码方案(“MCS”)编码的消息。 每个可用的MCS包括调制方案和有效的编码率。 MCS随着复杂性的增加而被索引。 确定信号干扰比(“SINR”),其足以满足预定的帧错误率(“FER”)。 确定使用第一MCS在SINR处满足预定FER所需的第一MCS和相应的传输量。 第一MCS具有比第二MCS更高的有效编码率。 第二MCS在单个传输中足够满足SINR下的预定FER。 根据第一MCS编码的消息通过使用混合自动重传请求(“HARQ”)的通信系统被发送,
    • 6. 发明申请
    • SYSTEM AND METHOD FOR PERFORMANCE ENHANCEMENT IN HETEROGENEOUS WIRELESS ACCESS NETWORKS
    • 异构无线接入网络性能提升的系统与方法
    • WO2011123696A1
    • 2011-10-06
    • PCT/US2011/030807
    • 2011-03-31
    • POWERWAVE TECHNOLOGIES, INC.SHEIKH, Khurram, P.VENKATRAMAN, Shankar
    • SHEIKH, Khurram, P.VENKATRAMAN, Shankar
    • H04W52/00
    • H04W52/143H04W52/08H04W52/226H04W52/228H04W52/243H04W52/245H04W52/267
    • A system and method for dynamically optimizing the transmission power levels for downlink voice and data signal transmitted from a base station (10) to user equipment (201 ) is disclosed. The user equipment (201 ) measures the strength and quality of the downlink signal, and transmits this downlink signal information to a control unit (96). The control unit (96) analyzes the downlink information and employs an adaptive self-learning traffic algorithm which determines optimized power levels for the downlink signals. The control unit (96) may optimize only one carrier signal or a subset of the multi-carrier signals in a preferred embodiment. The values of the optimized power levels are sent to the base station (10) which then increases or decreases the downlink transmission power of one or more carrier signals based on this level. As a result, the area associated with dead spots is reduced and the quality of the downlink signals is enhanced.
    • 公开了一种用于动态优化从基站(10)发送到用户设备(201)的下行语音和数据信号的发送功率电平的系统和方法。 用户设备(201)测量下行链路信号的强度和质量,并将该下行链路信号信息发送到控制单元(96)。 控制单元(96)分析下行链路信息,并采用自适应自学习业务算法,其确定下行链路信号的优化功率电平。 在优选实施例中,控制单元(96)可以优化仅一个载波信号或多载波信号的子集。 优化的功率电平的值被发送到基站(10),基站(10)基于该电平而增加或减少一个或多个载波信号的下行链路传输功率。 结果,与死点相关的区域减少,并且下行链路信号的质量得到提高。