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    • 4. 发明授权
    • Variable spacing pulse position modulation for ultra-wideband communication links
    • 用于超宽带通信链路的可变间隔脉冲位置调制
    • US07082153B2
    • 2006-07-25
    • US10251954
    • 2002-09-23
    • Krishna BalachandranDoru CalinTingfang JiJoseph H. Kang
    • Krishna BalachandranDoru CalinTingfang JiJoseph H. Kang
    • H04B1/69H04B7/212H03K7/04
    • H04B1/7176H04B2001/6908H04L25/4902
    • Methods and systems for generating a variable spacing pulse position modulated (VSPPM) signal for transmission across an ultra-wideband communications channel. The variable pulse position modulated spread spectrum signal is created by encoding every M input data bits from an input data stream into a symbol consisting of Nc chips. Each chip is divided into 2M sub-chips and each sub-chip is further divided into Np time slots. A pulse is transmitted for each chip in the symbol. During each chip period, the pulse is placed in the sub-chip corresponding to the binary M-tuple (or symbol) value. A time hopping code sequence consisting of Nc elements with a one-to-one chip association is then applied to each symbol so that the position of each pulse is shifted to the appropriate time slot that corresponds to the time hopping code value.
    • 用于生成用于跨超宽带通信信道传输的可变间隔脉冲位置调制(VSPPM)信号的方法和系统。 可变脉冲位置调制扩频信号是通过将每输入数据流中每M个输入数据位编码成由N个芯片组成的符号来产生的。 每个芯片被分成2个M个子芯片,并且每个子芯片被进一步分成N个时隙。 为符号中的每个芯片发送一个脉冲。 在每个码片周期期间,脉冲被放置在对应于二进制M元组(或符号)值的子芯片中。 然后将由具有一对一芯片关联的N< c>元素组成的跳时码序列应用于每个符号,使得每个脉冲的位置被转移到对应于 跳码代码。
    • 6. 发明申请
    • Network Node And Method For Virtual Soft Handoff Operation
    • 用于虚拟软切换操作的网络节点和方法
    • US20130188608A1
    • 2013-07-25
    • US13357965
    • 2012-01-25
    • Krishna BalachandranJoseph H. KangKemal M. KarakayaliKiran M. Rege
    • Krishna BalachandranJoseph H. KangKemal M. KarakayaliKiran M. Rege
    • H04W36/08
    • H04W36/30H04W24/02H04W36/18
    • Various methods and network nodes (e.g., base stations or base transceiver nodes) are provided to address the need for enhanced uplink performance. In a first method, a virtual soft handoff network node receives (501), from a serving network node, information related to uplink communications of user equipment (UE) served by the serving network node, wherein a soft handoff is not established between the virtual soft handoff network node and the UE. The virtual soft handoff network node receives (502) uplink communications between the UE and the serving network node and processes (503) the uplink communications to determine decoded uplink data from the UE. In a second method, a serving network node sends (401) to a virtual soft handoff network node, information related to uplink communications of user equipment (UE), the UE being served by the serving network node but not in soft handoff with the virtual soft handoff network node.
    • 提供各种方法和网络节点(例如,基站或基站收发器节点)以满足对增强的上行链路性能的需要。 在第一种方法中,虚拟软切换网络节点从服务网络节点接收与由服务网络节点服务的用户设备(UE)的上行链路通信有关的信息(501),其中虚拟 软切换网络节点和UE。 虚拟软切换网络节点在UE和服务网络节点之间接收(502)上行链路通信,并处理(503)上行链路通信,以确定来自UE的解码的上行链路数据。 在第二种方法中,服务网络节点向虚拟软切换网络节点发送(401)与用户设备(UE)的上行链路通信相关的信息,所述UE由服务网络节点服务但不与软切换中的虚拟 软切换网络节点。
    • 8. 发明授权
    • Method of quality-based frequency hopping in a wirelesscommunication system
    • 无线通信系统中基于质量的跳频方法
    • US08243779B2
    • 2012-08-14
    • US11118816
    • 2005-04-29
    • Krishna BalachandranJoseph H Kang
    • Krishna BalachandranJoseph H Kang
    • H04B1/00
    • H04B1/715H04B1/7143
    • In a wireless communications system which hops from frequency to frequency, rather than hopping according to a fixed dwell interval and a pre-determined pseudo-random hop sequence, a quality-based frequency hopping methodology is defined in which a new frequency is hopped to when the channel quality on the current frequency degrades based on the measured value or values of one or more predetermined metrics that are associated with channel quality. When triggered to hop to a next frequency, the hop-to-frequency may be the next frequency in the pseudo-random hop sequence known to both the transmitter and receiver or, in order to improve the reliability of communications, may be determined based on channel quality measurements on different potential hop-to-frequencies.
    • 在从频率跳频而不是根据固定的驻留间隔跳频和预定义的伪随机跳频序列的无线通信系统中,定义了基于质量的跳频方法,其中跳频到新的频率 基于与信道质量相关联的一个或多个预定度量的测量值或值,当前频率上的信道质量下降。 当被触发跳到下一个频率时,跳到频率可以是发射机和接收机都已知的伪随机跳序列中的下一个频率,或者为了提高通信的可靠性,可以基于 信道质量测量在不同的潜在跳到频率。
    • 9. 发明授权
    • Methods of discovering neighbors in opportunistic open access ad hoc wireless networks
    • 在机会开放接入自组织无线网络中发现邻居的方法
    • US08023552B2
    • 2011-09-20
    • US11525495
    • 2006-09-22
    • Krishna BalachandranJoseph H Kang
    • Krishna BalachandranJoseph H Kang
    • H04B1/713
    • H04W8/005H04B1/7143H04B1/715H04W84/18
    • In an ad hoc wireless network, for purposes of neighbor discovery, a transmitting node transmits a beacon within a timeslot and at a frequency that varies from timeslot-to-timeslot according to one or more associated and known pseudo-random or cyclical frequency hopping sequences. When, during a timeslot, the frequency hopping sequence would select a beacon frequency that if transmitted would violate spectrum policy that is in place during that timeslot, then, during that timeslot, a beacon is not transmitted during that timeslot. During each timeslot, a neighbor receiving node attempts to detect and decode a transmitted beacon at a frequency specified by the frequency hopping sequence that it expects a transmitting node to be using. When a receiving node successfully detects and decodes a beacon transmitted by a transmitting node, neighbor discovery between the transmitting and receiving nodes is achieved.
    • 在自组织无线网络中,为了邻居发现的目的,发射节点根据一个或多个相关联和已知的伪随机或循环跳频序列在时隙内和频率上发射信标,时隙到时隙变化 。 当在时隙期间跳频序列将选择一个信标频率,如果传输的信号频率将违反在该时隙期间就位的频谱策略,则在该时隙期间,在该时隙期间不发送信标。 在每个时隙期间,邻居接收节点尝试以期望发射节点正在使用的跳频序列指定的频率来检测和解码所发送的信标。 当接收节点成功地检测并解码由发送节点发送的信标时,实现发送节点与接收节点之间的邻居发现。
    • 10. 发明授权
    • Adaptive method of floor control with fast response time and fairness in communication network
    • 自适应地板控制方法,响应时间快,通信网络公平
    • US07873067B2
    • 2011-01-18
    • US11647930
    • 2006-12-29
    • Krishna BalachandranThomas P. ChuJoseph H. Kang
    • Krishna BalachandranThomas P. ChuJoseph H. Kang
    • H04J3/02
    • H04L12/1822H04W72/005
    • In a floor control system for a network, a floor control server controls a floor-based application for communications between multiple participant terminals. The server carries out a floor determination process that includes an adaptive waiting function. Upon receiving an initial floor request message, the server waits for additional requests before determining the floor winner. The wait time is a function of the floor request load. When the system is lightly loaded, the wait time is generally small. For heavier request loads, the wait time is generally longer, to ensure that a reasonable number of requests are received before awarding the floor. The wait time may be limited by a maximum wait time, which is a function of the floor request load. If a designated number of floor requests is received before the maximum wait time expires, a temporary floor winner is granted the floor if its priority is sufficiently high.
    • 在用于网络的楼层控制系统中,楼层控制服务器控制用于多个参与者终端之间的通信的基于楼层的应用。 服务器执行包括自适应等待功能的楼层确定过程。 在接收到初始楼层请求消息之后,服务器在确定楼层赢家之前等待附加请求。 等待时间是楼层请求负载的函数。 当系统轻载时,等待时间通常较小。 对于较重的请求负载,等待时间通常较长,以确保在授予发言权之前收到合理数量的请求。 等待时间可能受限于最大等待时间,这是楼层请求负载的函数。 如果在最大等待时间到期之前接收到指定数量的楼层请求,则如果其优先级足够高,则临时楼层优胜者被授予楼层。