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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Liou, Ren-HuangSubject: search.filters.subject.mobility management

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Now showing 1 - 4 of 4
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    A dynamic paging scheme for long-term evolution mobility management
    (2015-03-01)
    Lin, Yi-Bing
    ;
    Liou, Ren-Huang
    ;
    Chang, Chun-Ting
    ;
    資訊工程學系
    ;
    Department of Computer Science
    In long-term evolution, the service area is partitioned into several tracking areas (TAs), which comprise one or more cells (the radio coverages of base stations). The TAs are grouped into TA list (TAL). When an incoming call arrives, the network attempts to connect to the user equipment (UE) by paging the cells in the UE's TAL, which may incur large paging traffic that significantly consumes the limited radio resources. To resolve this issue, this paper proposes a dynamic paging scheme that determines the paging sequence of cells in real time according to the UE movement and call behavior. We compare the performance of the dynamic paging with that of the previously proposed Cell-TA-TAL (CTT) paging. Our study indicates that the dynamic paging outperforms the CTT paging when movement pattern is regular and the UE moves frequently. Copyright (c) 2013 John Wiley & Sons, Ltd.
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    Item type:Item,
    Reducing International Call Costs for Roamer to Roamer Calls
    (2010-10-01)
    Chen, Yuan-Kai
    ;
    Lin, Yi-Bing
    ;
    Liou, Ren-Huang
    ;
    資訊工程學系
    ;
    Department of Computer Science
    Existing mobile telecom operators allow subscribers to receive mobile phone services when they roam in other countries. However, call setup to an international roaming subscriber is indirectly routed through the home network of the subscriber, which results in the usage of two expensive international telephone trunks. In this paper, we propose a plug-in roaming gateway to avoid the international trunk connections. Our solution is especially attractive when both call parties are roamers.
  • Thumbnail Image
    Item type:Item,
    Reducing International Call Costs for Roamer to Roamer Calls
    (2010-10-01)
    Chen, Yuan-Kai
    ;
    Lin, Yi-Bing
    ;
    Liou, Ren-Huang
    ;
    資訊工程學系
    ;
    Department of Computer Science
    Existing mobile telecom operators allow subscribers to receive mobile phone services when they roam in other countries. However, call setup to an international roaming subscriber is indirectly routed through the home network of the subscriber, which results in the usage of two expensive international telephone trunks. In this paper, we propose a plug-in roaming gateway to avoid the international trunk connections. Our solution is especially attractive when both call parties are roamers.
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    Item type:Item,
    An Investigation on LTE Mobility Management
    (2013-01-01)
    Liou, Ren-Huang
    ;
    Lin, Yi-Bing
    ;
    Tsai, Shang-Chih
    ;
    資訊工程學系
    ;
    Department of Computer Science
    Mobility management in Long Term Evolution (LTE) is different from that in the third generation mobile telecom networks. In LTE, the Mobility Management Entity (MME) is responsible for the mobility management function. The MME is connected to a large number of evolved Node Bs (cells) that are grouped into the Tracking Areas (TAs). The TAs are further grouped into TA Lists (TALs). When a User Equipment (UE) moves out of the current TAL, it reports its new location to the MME. If the LTE network attempts to connect to the UE, the MME asks the cells in the TAL to page the UE. In LTE paging, the MME may sequentially page a cell, the TA of the cell, and/or the TAL of the cell. This paper investigates the performance of LTE paging, and provides the guidelines for the best paging sequence of cells.