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    • 35. 发明授权
    • Broadcast latency optimization in multihop wireless networks
    • 多跳无线网络中的广播延迟优化
    • US07903653B2
    • 2011-03-08
    • US12335727
    • 2008-12-16
    • Seungjoon LeeRajiv GandhiYoo-Ah Kim
    • Seungjoon LeeRajiv GandhiYoo-Ah Kim
    • H04L12/28
    • H04W72/005H04L12/189H04L45/16H04L45/48H04W40/246H04W72/121
    • A system and methodology that can optimize practical performance by reducing broadcast latency and collisions in a multihop wireless network is provided. The system includes an optimization component that determines a schedule for transmitting and/or receiving messages at nodes in the network during one-to-all broadcasting, all-to-all broadcasting, and/or all-to-one collection. The schedule enables each node in wireless network to participate in broadcasting as soon as possible, such that, when a node transmits a message to its parent to deliver the message to a source node, the children of the node also receive the message and initiate broadcasting the message in their subtrees in parallel. Further, during data collection, the schedule for messages to be transmitted to a sink node is determined based in part on a priority associated with the message. Additionally, the generated schedule does not affect a set of theoretical bounds associated with a broadcast algorithm employed by the network.
    • 提供了可以通过减少多跳无线网络中的广播延迟和冲突来优化实际性能的系统和方法。 该系统包括优化组件,该优化组件确定在一对一广播,一对一广播和/或一对一集合期间在网络中的节点处的发送和/或接收消息的调度。 该调度使得无线网络中的每个节点尽可能地参与广播,使得当节点向其父节点发送消息以将消息传递到源节点时,节点的子节点也接收消息并发起广播 他们的子树中的消息并行。 此外,在数据收集期间,部分地基于与消息相关联的优先级来确定要发送到汇聚节点的消息的调度。 另外,生成的时间表不影响与由网络使用的广播算法相关联的一组理论界​​限。
    • 39. 发明申请
    • Content Placement
    • 内容放置
    • US20120137336A1
    • 2012-05-31
    • US12955672
    • 2010-11-29
    • David L. ApplegateAaron F. ArcherVijay GopalakrishnanSeungjoon LeeKadangode Ramakrishnan
    • David L. ApplegateAaron F. ArcherVijay GopalakrishnanSeungjoon LeeKadangode Ramakrishnan
    • H04N7/173
    • H04N21/252H04N21/2225H04N21/47202
    • A method includes receiving data identifying new media content items to be added to a media distribution system that provides media content on demand to a plurality of endpoints. The media distribution system includes a plurality of distribution nodes, and each of the distribution nodes is coupled to a subset of the endpoints. Historical demand is determined during a particular time period for existing media content items that include content available via at least one of the distribution nodes before the data was received. The method includes forecasting demand for media content items, including new media content items and existing media content items, based on the historical demand. Each media content item is assigned to, and stored at, at least one corresponding distribution node based at least partially on a cost function and the forecasted demand.
    • 一种方法包括接收标识要添加到向多个端点提供媒体内容的媒体分发系统的新媒体内容项目的数据。 媒体分发系统包括多个分发节点,并且每个分发节点耦合到端点的子集。 历史需求是在特定时间段内确定的,该现有媒体内容项包括在接收数据之前通过至少一个分发节点可用的内容。 该方法包括根据历史需求预测媒体内容项目的需求,包括新媒体内容项目和现有媒体内容项目。 至少部分地基于成本函数和所预测的需求将每个媒体内容项目分配给至少一个对应分配节点并存储在其中。
    • 40. 发明申请
    • Method and apparatus for scheduling data packet transmission over a multihop wireless backhaul network
    • 用于通过多跳无线回程网络调度数据分组传输的方法和装置
    • US20070058604A1
    • 2007-03-15
    • US11225516
    • 2005-09-13
    • Seungjoon LeeGirija NarlikarGordon WilfongYihao Zhang
    • Seungjoon LeeGirija NarlikarGordon WilfongYihao Zhang
    • H04J3/00
    • H04W72/0446H04W84/22
    • A method and apparatus for scheduling the transmission of data packets over a multihop wireless backhaul network in which delay guarantees through the network may be advantageously ensured. Illustratively, a novel packet scheduling scheme is provided which is advantageously based on an existing scheduling policy for wireline networks and for which a delay guarantee (based on the delay characteristics of the existing scheduling policy) can be advantageously ensured. In one embodiment, an even-odd link activation framework is defined for a given multihop wireless backhaul network, and an associated scheduling policy based on an arbitrary existing scheduling policy for wireline networks is derived and adopted. In such a case, the derived scheduling policy, when applied to the given multihop wireless backhaul network, advantageously ensures a worst-case delay guarantee of approximately twice that of the existing scheduling policy for wireline networks.
    • 可以有利地确保通过多跳无线回程网络调度数据分组的传输的方法和装置,其中通过网络的延迟保证。 示例性地,提供了一种新颖的分组调度方案,其有利地基于用于有线网络的现有调度策略,并且可以有利地确保延迟保证(基于现有调度策略的延迟特性)。 在一个实施例中,为给定的多跳无线回程网络定义偶数链路激活框架,并且导出并采用基于用于有线网络的任意现有调度策略的相关调度策略。 在这种情况下,当应用于给定的多跳无线回程网络时,派生的调度策略有利地确保了用于有线网络的现有调度策略的最差情况延迟保证的两倍。