摘要(英) |
Mobility management is one of the major functions of cellular network. The aim of mobility management is to track the location of UE (User Equipment). When new call arrives, the cellular network has to determine the base station to page the UE according to its location. To do it, UE has to issue tracking area update (TAU) request to cellular network whenever it moves into range of new base station. It is a tradeoff between the paging cost and tracking area update cost. Regarding location management in PCS (Personal Communications Service) network, many location management methods have been proposed and they could be classified into several categories, distance based, time based, and movement based, all these methods consider only the mobility of UEs. The allocation of TA (Tracking Area) is based on the mobility characteristic of UEs. However, we found that the telephonic traffic is another potential factor, which may directly impact the performance rather than the mobility.
This thesis proposes an efficient scheme, which treats user′s telephonic traffic as an essential factor, to allocate proper TA for specific UE. We first estimate the parameter of telephonic traffic and then use fuzzy logic controller to decide size of tracking area. Based on it, we can find a TA allocation strategy to minimize the signaling cost of paging and TAU.
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參考文獻 |
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