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    • 3. 发明公开
    • Wireless communication network node and method
    • Drahtloser Kommunikationsnetzknoten und Verfahren
    • EP2908597A1
    • 2015-08-19
    • EP14305190.2
    • 2014-02-14
    • ALCATEL LUCENT
    • Lin, Chih-KuangKennedy, Irwin
    • H04W84/18
    • H04W74/0816H04W84/18
    • A wireless communication network control node method for use in a wireless communication network comprising a plurality of nodes operable to directly sense other nodes, a computer program product and network control node operable to perform that method. The method comprises: determining for each node in the network, an indication of direct neighbour nodes; grouping the nodes into node clusters such that each node in the network belongs to one node cluster and each node in the same node cluster can directly sense all other nodes in that cluster, and selecting a set of node clusters such that the total number of node clusters in the network is minimised; assessing, for a selected network performance objective, how many simultaneous signals can be successfully decoded by a node in the network and calculating, based on the assessment, a simultaneous signal group number; comparing the number of node clusters in the selected set of node clusters with the calculated simultaneous signal group number; and modifying the selected set of node clusters in dependence upon the simultaneous signal group number. Arrangements described provide a method of clever network organization that combines CSMA approaches and Successive Interference Cancellation (SIC) processes to optimize overall throughput. Some arrangements introduce code-based carrier sensing to CSMA/ CA to enhance overall capacity.
    • 一种用于无线通信网络的无线通信网络控制节点方法,包括可操作以直接感测其他节点的多个节点,可操作以执行该方法的计算机程序产品和网络控制节点。 该方法包括:确定网络中的每个节点,直接邻居节点的指示; 将节点分组为节点集群,使得网络中的每个节点属于一个节点集群,同一节点集群中的每个节点可以直接感知该集群中的所有其他节点,并选择一组节点集群,使节点总数 网络中的群集被最小化; 评估对于所选择的网络性能目标,可以由网络中的节点成功解码多少并发信号,并且基于评估计算同时信号组号; 将所选择的一组节点簇中的节点簇的数目与所计算的同时信号组数进行比较; 以及根据同步信号组号修改所选择的一组节点簇。 描述的安排提供了一种巧妙的网络组织的方法,其结合CSMA方法和连续干扰消除(SIC)过程以优化总体吞吐量。 一些安排将基于代码的载波感测引入CSMA / CA,以增强总体容量。
    • 4. 发明公开
    • Clustering of wireless sensor networks based on hidden node detection
    • 基于检测隐藏节点在克拉斯燕鸥无线传感器网络的结构
    • EP2747505A1
    • 2014-06-25
    • EP12306620.1
    • 2012-12-19
    • Alcatel Lucent
    • Lin, Chih-KuangMullany, Francis
    • H04W72/08H04W84/18
    • H04W74/02H04W28/0221H04W28/0236H04W28/0284H04W40/32H04W74/0816H04W84/18
    • In an adaptive cluster forming and scheduling method for ad-hoc networks (802.15.4, Zigbee), dependent on received energy level and the detected periods of high and low energy levels, above or below a threshold, it is determined whether a normal traffic situation, a traffic overload situation or a hidden node situation exists. Packet transmission failure is a further criteria for the scheduling method. The clusters consists only of one-hop neighbours.
      The method comprises: collating measured changes in energy levels received over a transmission channel of a wireless telecommunications network; and determining a current condition of the transmission channel by establishing a conformance of the measured changes with expected changes in energy levels when operating under at least one condition. By collating the actual measured changes in energy levels, an accurate, dynamic indication of the energy levels being experienced on the transmission channel can be determined. Also, by correlating the measured changes of the transmission channel when operating in accordance with a particular condition, the conformance or not of the channel with that condition can be determined in order to provide an accurate indication of the current condition of the transmission channel. This avoids having to rely on historic information which may only be relevant to the condition of the channel at previous points in time or having to rely on empirical information which may not be of sufficiently fine granularity either quantitatively or temporally to enable a detailed assessment of the current condition of the transmission channel to be determined. Also, by measuring changes in energy levels, the cause of any non-conformance with a particular operating condition may be derivable, which may not be possible with other indicators.
    • 在自适应簇形成以及调度方法用于自组织网络(802.15.4,紫蜂),依赖于接收的能量水平和高,低能量水平,高于或低于阈值的检测到的时段,这是确定性的开采无论正常流量 的情况下,流量过载情况或隐藏节点的情况存在。 分组传输失败是用于调度方法的进一步的标准。 这些集群besteht唯一的单跳邻居。 该方法包括:在核对能量水平测量变化超过一个无线电信网络的传输信道接收; 和确定性采矿通过建立的所测量的变化的一致性与energylevels预期的变化当至少一个条件下操作的传输信道的当前状态。 通过核对在能量水平的实际测量的改变,到所述能量水平的精确,动态指示正在经历所述传输信道可以是确定性的开采。 所以,通过关联当雅舞蹈用特定条件下,一致性或不是信道的操作的发送信道的所测量的变化与没有条件可以是确定性的,以便提供到传输信道的当前状况的精确指示开采。 这样就不必依靠历史信息这可能仅适用于在前面点的信道的条件在时间或不必依赖于可能不充分细粒度的定量或暂时启用的一个详细的评估经验信息 传输信道的当前状态被确定的开采。 因此,通过测量能量水平的变化,任何不符合与特定的操作条件的原因可能是推导,这可能无法与其他指标。
    • 7. 发明公开
    • Clustering and resource allocation in ad hoc networks
    • Ad hoc网络集群和资源分配
    • EP2552168A1
    • 2013-01-30
    • EP11360030.8
    • 2011-07-27
    • Alcatel Lucent
    • Mullany, Francis J.Lin, Chih-Kuang
    • H04W72/12
    • H04W72/121H04W84/18
    • Methods of scheduling network node transmission in a wireless communication network, computer program products, a network node gateway and a network node are disclosed. One method comprises causing allocation of each network node of the wireless communication network to at least one of a plurality of clusters of network nodes, each cluster of network nodes comprising only those network nodes which detect transmissions from every network node within that cluster; and scheduling transmissions by network nodes within each of the plurality of clusters to be performed using resources of a transmission separation scheme allocated to be shared by network nodes within that cluster of network nodes. Through this approach, inter-cluster transmissions avoid collision or interference since they are scheduled to be transmitted using different resources. Also, because each network node in the cluster is able to detect or sense transmissions by other network nodes within the cluster, no collisions or interference should occur as a result of intra-cluster transmissions (i.e. transmissions within each cluster). This helps to improve the performance of the wireless communication network, particularly those which operate the contention-based channel access technology Carrier Sensing Multiple Access / Collision Avoidance (CSMA/CA) to deliver their traffic to a destination node.
    • 9. 发明公开
    • A communications system, an access network node and a method of optimising energy consumed in a communication network
    • 通信系统中,接入网络节点和方法,用于在消耗的能量的一个通信网络中优化
    • EP2869644A1
    • 2015-05-06
    • EP13360034.6
    • 2013-10-31
    • ALCATEL LUCENT
    • Lin, Chih-KuangVenkateswaran, Vijay
    • H04W52/02
    • H04W52/0229H04Q2209/43H04W4/70H04W24/02H04W48/16H04W52/0206H04W52/0216H04W52/0219H04W84/18Y02D70/144Y02D70/162Y02D70/21Y02D70/22
    • There is provided a communications system comprising an access network node and a plurality of resource limited nodes. The access network node comprises: a control unit operable to estimate a belief on a network condition for a resource limited node of the plurality of resource limited nodes based on network observations and a history profile of the network observations; dynamically update the belief for the resource limited node in the access network node; determine that the severity of the updated belief in the network condition is indicative that a change in sleep duty cycle of the resource limited node is required; determine that correlation between the resource limited nodes within the plurality of resource limited nodes is indicative that a change in sleep duty cycle of the resource limited node is required; and update the sleep duty cycle of the resource limited node to optimize the overall energy consumed in the resource limited nodes while achieving a specific detection threshold.
    • 提供了一种通信系统,包括接入网络节点和资源有限的节点的多个。 所述接入网络节点包括:控制单元,其可操作以估计对基于网络的观察和网络的观察的历史简档资源有限节点的多个资源有限节点的网络状态的总额; 动态更新的资源是在接入网络节点的有限节点; 确定性矿做了更新的严重性是在网络条件表示的确在需要有限节点资源的睡眠占空比的变化; 确定性矿做资源有限节点的多元性内的资源有限的节点之间的相关性指示并需要在资源有限的节点的睡眠占空比的变化; 和更新资源有限节点的睡眠占空比,以优化在资源有限的节点消耗的同时实现特定的检测阈值的总能量。