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    • 113. 发明申请
    • RECEIVER-INITIATED CHANNEL-HOPPING (RICH) METHOD FOR WIRELESS COMMUNICATION NETWORKS
    • 无线通信网络的接收机启动通道(RICH)方法
    • WO02037757A2
    • 2002-05-10
    • PCT/US2001/048475
    • 2001-10-29
    • H04B1/713H04B1/715H04L12/28H04L12/56H04W74/04H04L12/00
    • H04W74/085H04B1/713H04B2001/7154
    • A family of medium-access (MAC) collision-avoidance receiver-initiated channel-hopping (RICH) protocols which do not rely on carrier-sensing, or unique codes to each node within the network. The RICH protocol requires that each network nodes adhere to a common channel-hopping sequence, and that nodes that are not in a state of sending or receiving data will listen on the common channel hop. To send data nodes enter into a receiver-initiated dialogue over the channel-hop at the time at which a data transmission is needed. Nodes which succeed in performing the collision-avoidance handshake remain in the same channel-hop for the remainder of the data transfer, while the remaining nodes continue with the common channel hopping sequence. The described RICH protocols are capable of providing collision-free operation even in the presence of hidden terminals.
    • 一系列媒介接入(MAC)冲突避免接收方发起的信道跳频(RICH)协议,不依赖于载波侦听,或唯一的码到网络内的每个节点。 RICH协议要求每个网络节点遵守公共的信道跳频序列,并且不处于发送或接收数据状态的节点将在公共信道跳跃上进行侦听。 在需要进行数据传输时,要发送数据节点通过信道跳转进入接收器发起的对话。 成功执行冲突避免握手的节点在数据传输的剩余部分中保留在相同的信道跳数中,而其余节点继续使用公共信道跳频序列。 所描述的RICH协议即使在隐藏终端的存在下也能够提供无冲突的操作。
    • 115. 发明申请
    • MULTI-CHANNEL-BANDWIDTH FREQUENCY-HOPPING SYSTEM
    • 多通道带宽频率选择系统
    • WO0178247A9
    • 2002-04-11
    • PCT/US0111665
    • 2001-04-09
    • PROXIM INCNEGUS KEVIN J
    • NEGUS KEVIN J
    • H04B1/713
    • H04B1/713
    • A multi-channel-bandwidth frequency-hopping system is described in which low bandwidth and high bandwidth hops are possible. There are more center frequencies available for low bandwidth hops (34) than the high bandwidth hops (30). There are multiple possible center frequencies (f1-f5) for low bandwidth hops within the same bandwidth range (32) used for a single high bandwidth hop. By using more center frequencies for the low bandwidth hops than the high bandwidth hops, an improved system capacity, improved interference immunity, and backwards capacity with prior systems is provided.
    • 描述了一种多通道带宽跳频系统,其中低带宽和高带宽跳跃是可能的。 低带宽跳数(34)的中心频率可以高于高带宽跳数(30)。 在用于单个高带宽跳跃的同一带宽范围(32)内的低带宽跳数有多个可能的中心频率(f1-f5)。 通过为高带宽跳跃使用更多的中心频率用于低带宽跳跃,提供了改进的系统容量,改进的抗干扰能力以及使用现有系统的向后容量。
    • 116. 发明申请
    • FREQUENCY HOPPING SPREAD SPECTRUM SYSTEM WITH HIGH SENSITIVITY TRACKING AND SYNCHRONIZATION FOR FREQUENCY UNSTABLE SIGNALS
    • 具有高灵敏度跟踪和频率不稳定信号同步的频率偏移传播系统
    • WO02011348A3
    • 2002-03-28
    • PCT/US2001/024058
    • 2001-08-01
    • H04B1/709H04B1/713H04B1/7156H04L7/10H04L12/28H04L27/30
    • H04B1/7156H04B1/709H04B1/713H04W24/00H04W88/02
    • A wireless spread spectrum communication system (14) for transmitting data includes a plurality of end point transmitters (40) and at least one receiver (42). The end point transmitters transmit data via a frequency hopped spread spectrum signal where the transmitting signal is sent without the benefit of frequency stabilization. The receiver (42) is responsive to the frequency hopping spread spectrum signals and includes a correlator and a signal processor (52). The correlator samples at least a first portion of a preamble of the signal and correlates the portion of the preamble with known preamble pattern to determine a probalitity of correlation. The signal processor (52) applied a Fast Fourier Transform algorithm to the signal in response to the probability of correlation to track a narrowband frequency of the signal based on at least a second portion of the preamble and to decode data encoded within the signal subsequent to the preamble.
    • 用于发送数据的无线扩频通信系统(14)包括多个终点发射机(40)和至少一个接收机(42)。 终点发射机经由跳频扩频信号发送数据,其中发送信号不受频率稳定的影响。 接收器(42)响应于跳频扩频信号,并且包括相关器和信号处理器(52)。 相关器对信号的前导码的至少第一部分进行采样,并将前导码的部分与已知前导码模式相关联,以确定相关性的概率。 信号处理器(52)响应于相关概率向信号应用快速傅里叶变换算法,以基于前导码的至少第二部分跟踪信号的窄带频率,并对在该信号后面的信号中编码的数据进行解码 序言。
    • 118. 发明申请
    • LOCAL DATA DELIVERY THROUGH BEACONS
    • 通过信标分发本地数据
    • WO02001815A2
    • 2002-01-03
    • PCT/EP2001/006949
    • 2001-06-18
    • H04B1/713H04B7/26H04L12/28H04L12/56H04W4/00H04W8/26H04W84/18H04L12/18H04L29/06
    • H04B1/713H04W4/00H04W8/26H04W84/18
    • A communications system comprises first (12) and second (14) beacon devices capable of wireless message transmission and at least one portable device (10) capable of receiving such message transmissions. The first beacon is arranged to broadcast a series of inquiry messages (INQ) according to a first communications protocol, such as Bluetooth. The portable device (10) detects such inquiry messages and replies with an identifier for the portable device. The first beacon (12) then transmits the received identifier to the second beacon (14), with the second beacon (14) and portable device (10) configured to perform a service interaction when triggered by the second beacon receiving the portable device identifier.
    • 本发明涉及包括能够发射无线电消息的第一(12)和第二(14)信标装置的通信系统,以及能够接收这种类型的发射消息的至少一个便携式装置(10)。 。 第一信标被安排为基于诸如蓝牙的第一通信协议来广播一系列询问消息(INQ)。 便携式设备(10)检测这种类型的询问消息并用与便携式设备相关联的标识符进行响应。 第一信标(12)然后将接收到的标识符发送到第二信标(14),第二信标(14)和便携式设备(10)被设计为当其被第二信标(14)触发时执行服务交互。 标签接收便携式设备标识符。
    • 120. 发明申请
    • RESOURCE MANAGEMENT IN UNCOORDINATED FREQUENCY HOPPING SYSTEM
    • 资源管理在不协调的频率狩猎系统
    • WO01017136A1
    • 2001-03-08
    • PCT/EP2000/004323
    • 2000-05-12
    • H04B1/713H04B7/26H04J13/00H04L12/28H04L12/56H04W72/04H04J13/06H04Q7/38
    • H04B7/2628H04B1/713H04B2001/7154H04W24/10H04W48/08H04W72/00H04W72/02H04W76/10H04W84/18H04W92/18
    • A method and apparatus are described for applying a narrow band FH link for low-rate and medium-rate communications, and a stationary wide band channel for high-speed (HS) communications. A master and one or more slaves sharing the same FH link may form a piconet. Master and slaves may hop synchronously according to a pseudo-random hop sequence. A master may control traffic on the FH link. An HS link can be established between a master and one or more slaves or between two slaves. A appropriate band of the radio spectrum is selected adaptively based on lowest RSSI measurements both in master and slave to establish the HS link without making use of a hopping scheme. A master shares its time between the HS slave on the HS link and the slaves remaining on the FH link using Time Division multiplexing. If the HS link uses a part of the band over which the piconet hops, the master controls the traffic such that the HS link is never visited by the FH link. If the HS link and the FH link do not overlap, then hop avoidance is not required. The HS slave-pair remains in contact with the master by a beacon signal used on the FH link. Periodically, HS slaves interrupt HS communications to listen the FH link. The beacon protocol includes slaves returning from the HS link to the piconet channel. In an alternative embodiment, slaves communication over HS link for a time interval. Slaves automatically return to FH link after the expiration of the time interval.
    • 描述了一种应用用于低速和中速通信的窄带FH链路和用于高速(HS)通信的固定宽带信道的方法和装置。 共享相同FH链路的主机和一个或多个从机可以形成微微网。 主机和从机可以根据伪随机跳转序列同步跳频。 主机可以控制FH链路上的流量。 可以在主机和一个或多个从机之间或两个从机之间建立HS链路。 基于主和从机中的最低RSSI测量自适应地选择无线电频谱的适当频带,以建立HS链路而不利用跳频方案。 主机在HS链路上的HS从站与使用时分多路复用的FH链路上的从站之间共享其时间。 如果HS链路使用微微网跳跃的频带的一部分,则主控制业务,使得HS链路不被FH链路访问。 如果HS链路和FH链路不重叠,则不需要跳跃回避。 HS从机对通过FH链路上使用的信标信号与主机保持接触。 定期地,HS从站中断HS通信以监听FH链路。 信标协议包括从HS链路返回到微微网通道的从设备。 在替代实施例中,从站通过HS链路进行一段时间间隔的通信。 从站在时间间隔到期后自动返回FH链接。