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    • 51. 发明申请
    • Method for gracefully degrading packet data voice quality in a wireless communication network
    • 在无线通信网络中正常地降级分组数据语音质量的方法
    • US20070097957A1
    • 2007-05-03
    • US11264230
    • 2005-10-31
    • Binshi CaoXin WangYang Yang
    • Binshi CaoXin WangYang Yang
    • H04L12/66
    • H04L47/10H04L47/11H04L47/14H04L47/2416H04L47/25H04L47/32H04W28/06H04W28/10
    • A method for gracefully degrading packet data voice quality in a wireless network includes monitoring and evaluating data transfer conditions on the network. This may be done on a network-wide level, or for access terminals individually. For the evaluation, data transfer conditions are compared to criteria that indicate a relative quality level. Based on the evaluation, a variable number of the voice data packets addressed to the access terminals are eliminated prior to transmission over the airlink. If conditions are optimal, no data packets are eliminated. If not, one or more packets may be eliminated periodically (e.g., 1 data packet out of every five) until conditions change. The access terminals compensate for any eliminated packets. In this manner, packet data voice quality is gracefully degraded for temporarily reducing voice traffic on the network when conditions are poor, avoiding the need for dropped calls or the like.
    • 一种在无线网络中适度降级分组数据语音质量的方法包括监测和评估网络上的数据传输条件。 这可以在网络范围内进行,也可以单独进行接入终端。 对于评估,将数据传输条件与指示相对质量水平的标准进行比较。 基于该评估,在通过空中链路传输之前,消除了寻址到接入终端的可变数量的语音数据分组。 如果条件最佳,则不会消除任何数据包。 如果不是,则可以周期性地消除一个或多个分组(例如,每5个中1个数据分组),直到条件改变为止。 接入终端补偿任何消除的分组。 以这种方式,当条件差时,分组数据语音质量被适度地降级以临时降低网络上的语音流量,避免了掉话等的需要。
    • 52. 发明申请
    • Controlling transmission power in a reverse link of a feedback-based spread spectrum wireless network
    • 在基于反馈的扩频无线网络的反向链路中控制传输功率
    • US20070049317A1
    • 2007-03-01
    • US11213328
    • 2005-08-26
    • Bi QiYang YangLily Zhu
    • Bi QiYang YangLily Zhu
    • H04B7/00H04B1/00
    • H04W52/54H04W52/08H04W52/146
    • The present invention provides a method and an apparatus for communication with at least one wireless unit over a forward and a reverse link in a wireless network. The method includes receiving a feedback indication on at least a first channel over the forward link for reception of a transmission on at least a second channel over the reverse link, and adjusting transmit power of a wireless unit associated with the network based on the feedback indication. For example, a transmitter at a wireless unit associated with a spread spectrum wireless network, such as a code division multiple access cellular network, may control transmit power of in a reverse link. Specifically, the feedback indication for reception of a traffic or control channel over the reverse link may be received on a channel that is available on the forward link for another purpose than providing power control feedback. In this way, the transmitter performs reverse link power control at the wireless unit. By performing such reverse link power control, the transmitter obviates many conventional drawbacks associated with a receiver-centric power control in a feedback-based spread spectrum wireless communications system.
    • 本发明提供一种用于在无线网络中通过前向和反向链路与至少一个无线单元通信的方法和装置。 该方法包括:通过前向链路在至少第一信道上接收反馈指示,以在反向链路上的至少第二信道上接收传输,并且基于反馈指示调整与网络相关联的无线单元的发射功率 。 例如,与诸如码分多址蜂窝网络的扩频无线网络相关联的无线单元处的发射机可以控制反向链路的发射功率。 具体地,可以在前向链路上可用的信道上接收用于在反向链路上接收业务或控制信道的反馈指示,用于另外的目的,而不是提供功率控制反馈。 以这种方式,发射机在无线单元处执行反向链路功率控制。 通过执行这种反向链路功率控制,发射机消除了与基于反馈的扩频无线通信系统中的以接收机为中心的功率控制相关联的许多常规缺点。
    • 54. 发明申请
    • Locally interative encryption generating compliant ciphertext for general syntax specifications
    • 本地迭代加密生成符合一般语法规范的密文
    • US20060227965A1
    • 2006-10-12
    • US11095048
    • 2005-03-31
    • Bin ZhuYang YangShipeng Li
    • Bin ZhuYang YangShipeng Li
    • H04K1/06
    • H04L9/0637H04L9/065H04L2209/26H04L2209/30H04L2209/603
    • A fast and secure syntax compliant encryption schema, “locally iterative encryption,” can produce compliant ciphertext for a general syntax specification. In one implementation, an engine partitions a data stream into blocks, and encrypts each block iteratively until syntax compliance conditions are met. A system using the schema can utilize either stream ciphers or block ciphers in different modes. Locally iterative encryption methods are fast and remain at approximately the same speed even as the length of the data stream to be encrypted increases. Besides providing superior processing speed, the locally iterative encryption schema is also more robust to errors in the resulting ciphertext and in the resulting decrypted plaintext than conventional syntax compliant encryption techniques. Locally iterative encryption is secure as long as an underlying encryption cipher selected for use in the schema is secure.
    • 快速和安全的语法兼容加密模式“本地迭代加密”可以为通用语法规范提供符合规定的密文。 在一个实现中,引擎将数据流分割成块,并且迭代地对每个块进行加密,直到满足语法符合条件。 使用该模式的系统可以利用不同模式的流密码或块密码。 即使要加密的数据流的长度增加,本地迭代加密方法也是快速且保持大致相同的速度。 除了提供优越的处理速度之外,本地迭代加密模式对于所生成的密文中的错误以及生成的解密明文也比传统的符合法规的加密技术更加鲁棒。 只要选择用于模式的底层加密密码是安全的,本地迭代加密就是安全的。