A location-based mobility tracking scheme for PCS networks
A location-based mobility tracking scheme for PCS networks
复制标题
一种基于位置的PCS网络移动跟踪方案
DOI：
10.1016/s0140-3664(00)00202-4
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
C. Douligeris
中科院分区：
文献类型：
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作者：
Zuji Mao;C. Douligeris
本文介绍了一种用于个人通信服务（PCS）系统的基于位置的定位策略。在所提出的方案中，位置更新基于移动计数器的值。移动计数器的更新基于自上次位置更新以来移动终端(MT)所访问的位置的信息。具体地，自上次位置更新以来的部分访问小区的小区标识符和相应的移动计数器值被保存在MT中。当MT进入其自身未存储标识的小区时，移动计数器加1。如果移动计数器达到更新阈值，则触发位置更新；否则，将小区标识和对应的移动计数器值存储在MT中。当MT进入MT中标识为该小区的小区时，移动计数器被分配MT中保存的该小区的计数器值，并移除MT中所有计数器值较大的小区。所提出的方案允许根据每个用户的呼叫和移动模式动态选择更新阈值。已经开发了分析和仿真模型来将所提出的方案与基于移动的方案和基于距离的方案进行比较。结果表明，当呼叫移动率（CMR）较低时，与基于移动的方案相比，所提出的方案可以显着降低成本。例如，当 CMR 为 0.01 时，通过所提出的方案，每次呼叫到达的最佳总成本可节省约 25%。此外，所提出的方案比基于距离的方案更容易实现。
This paper introduces a location-based locating strategy for Personal Communication Services (PCS) systems. In the proposed scheme, location updates are based on the value of a movement counter. The update of the movement counter is based on information on the locations visited by a mobile terminal (MT) since the last location update. In particular, the cell identifiers and the corresponding movement counter values are maintained in the MT for a part of the visited cells since the last location update. When the MT enters a cell whose identifier is not stored in the MT, the movement counter increases by one. If the movement counter reaches the update threshold, a location update is triggered; otherwise, the cell identifier and the corresponding movement counter value are stored in the MT. When the MT enters a cell whose identifier is in the MT, the movement counter is assigned with the counter value kept in the MT for this cell, and all cells with greater counter values in the MT are removed. The proposed scheme allows the dynamic selection of the update threshold according to each user's calling and mobility patterns. Analytical and simulation models have been developed to compare the proposed scheme with both the movement-based scheme and the distance-based scheme. Results demonstrate that when the call-to-mobility ratio (CMR) is low, the proposed scheme can achieve a significant cost reduction compared to the movement-based scheme. For example, when the CMR is 0.01, a savings of around 25% in the optimal total cost per call arrival is achieved with the proposed scheme. Moreover, the proposed scheme is easier to implement than the distance-based scheme.