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    • 42. 发明授权
    • Measurement-based admission control for wireless packet data services
    • 无线分组数据业务的基于测量的准入控制
    • US07558201B2
    • 2009-07-07
    • US11278154
    • 2006-03-31
    • Aimin SangXiaodong WangMohammad Madihian
    • Aimin SangXiaodong WangMohammad Madihian
    • G01R31/08
    • H04L47/801H04L47/10H04L47/15H04L47/70H04L47/808H04L47/822H04L47/823H04L47/824
    • A call admission control technique is described which is well-suited for wireless systems providing real-time services over a shared downlink. The call admission control technique considers both multiplexing and multi-user diversity gain. The technique accurately determines the multi-user diversity gain by measuring per-user resource allocation and advantageously maximizes user accommodations under quality-of-service (QoS) as well as location-dependent resource availability constraints. In a further aspect, the call admission control technique is combined with delay-based scheduling, which effectively balances between system efficiency (channel exploitation) and user expectation (e.g., QoS). A system embodying the described call admission control and scheduling techniques can advantageously deliver efficient real-time services and remain robust to different load scenarios that vary according to system dynamics and/or user mobility.
    • 描述了一种适合于通过共享下行链路提供实时服务的无线系统的呼叫准入控制技术。 呼叫接纳控制技术考虑复用和多用户分集增益。 该技术通过测量每用户资源分配来准确地确定多用户分集增益,并有利地最大限度地提高了服务质量(QoS)以及位置相关资源可用性约束下的用户住宿。 在另一方面,呼叫接纳控制技术与基于延迟的调度相结合,其有效平衡系统效率(信道利用)和用户期望(例如,QoS)之间的平衡。 体现所描述的呼叫接纳控制和调度技术的系统可以有利地提供有效的实时服务,并且对于根据系统动态和/或用户移动性而变化的不同负载情况保持稳健。
    • 43. 发明申请
    • Wireless Communication Rate Allocation on a Gaussian Interference Channel
    • 高斯干扰信道上的无线通信速率分配
    • US20090129328A1
    • 2009-05-21
    • US12273810
    • 2008-11-19
    • Narayan PrasadXiaodong Wang
    • Narayan PrasadXiaodong Wang
    • H04W74/00
    • H04W28/22H04W72/04
    • There is provided a method for allocating transmission rates in a wireless network, includes the steps of associating transmitters with corresponding receivers for communicating on an interference channel in the wireless network, and allocating a transmission rate to each transmitter for decoding by its corresponding receiver, the allocated transmission rate being equal to a desired rate of a fixed user rate and being no less than a minimum rate of a variable user rate. The step of allocating can include a sequential allocation that meets the minimum rate requirement of all users and assigns excess rates to variable rate users in a sequential fashion according to specified priorities. The step of allocating can include a parallel symmetric rate allocation when all variable rate users have the same priority and that meets minimum rate requirements of all users and is symmetric fair. The step of allocating can include a parallel iterative rate allocation with the sequence of rate allocations obtained for each user being non-decreasing and a rate allocation vector obtained after each iteration meets minimum rate requirements for all users and is max-min fair when all variable rate users have the same priority.
    • 提供了一种用于在无线网络中分配传输速率的方法,包括将发射机与对应的接收机相关联的步骤,用于在无线网络中的干扰信道上进行通信,并且向每个发射机分配传输速率以由其对应的接收机进行解码, 分配的传输速率等于固定用户速率的期望速率,并且不小于可变用户速率的最小速率。 分配步骤可以包括满足所有用户的最低速率要求的顺序分配,并且根据指定的优先级以顺序方式向可变速率用户分配超额费率。 当所有可变速率用户具有相同优先级并且满足所有用户的最低速率要求并且对称公平时,分配步骤可以包括并行对称速率分配。 分配步骤可以包括并行迭代速率分配,其中为每个用户获得的速率分配序列是不减少的,以及在每个迭代满足所有用户的最小速率要求之后获得的速率分配向量,并且当所有变量 率用户具有相同的优先级。
    • 46. 发明申请
    • Group MMSE-DFD with Rate (SINR) Feedback and Pre-Determined Decoding Order for Reception on a Cellular Downlink
    • 具有速率(SINR)反馈的组MMSE-DFD和在蜂窝下行链路上接收的预定解码顺序
    • US20080225979A1
    • 2008-09-18
    • US12047544
    • 2008-03-13
    • Narayan PrasadXiaodong WangMohammad Madihian
    • Narayan PrasadXiaodong WangMohammad Madihian
    • H04B15/00
    • H04W72/082H04B7/0854H04B17/24H04B17/336H04L1/0026H04L1/0631H04L1/0668H04L25/03057H04L2025/03414H04L2025/0349H04W4/06H04W24/00H04W84/042
    • A method for decoding and rate assignment in a wireless channel, where all dominant transmitter sources use inner codes from a particular set, comprising the steps of: i) estimating channel matrices seen from all dominant transmitter sources in response to a pilot or preamble signal transmitted by each such source; ii) converting each estimated channel matrix into an effective channel matrix responsive to the inner code of the corresponding transmitter source; iii) obtaining the received observations in a linear equivalent form (linear model) whose output is an equivalent of the received observations and in which the effective channel matrix corresponding to each dominant transmitter source inherits the structure of its inner code; iv) processing the transmitter sources according to the specified (or pre-determined) order of decoding; v) for each transmitter source, assuming perfect cancellation of signals of preceding transmitter sources; vi) computing a signal-to-interference-noise-ratio SINR responsive to the effective channel matrix of the transmitter source and the covariance matrix of the noise plus signals from remaining transmitter sources; and vii) feeding back all computed SINRs to respective transmitter sources.
    • 一种用于在无线信道中解码和速率分配的方法,其中所有主要发射机源使用来自特定集合的内部码,包括以下步骤:i)响应于传输的导频或前导信号估计从所有主要发射机源看到的信道矩阵 由每个这样的来源; ii)响应于对应的发射机源的内部码,将每个估计的信道矩阵转换成有效信道矩阵; iii)以线性等效形式(线性模型)获得接收到的观测值,其输出等于所接收的观测值,并且其中对应于每个主要发射机源的有效信道矩阵继承其内部码的结构; iv)根据指定(或预定)解码顺序处理发射机源; v)对于每个发射机源,假设完全取消先前发射机的信号; vi)响应于发射机源的有效信道矩阵和来自剩余发射机源的噪声加信号的协方差矩阵来计算信噪比SINR; 和vii)将所有计算的SINR反馈到相应的发射机源。