長程演進網路（Long Term Evolution Network)中家用基地台（Home eNodeB, HeNB)下的兩個 UE(User Equipment)想要互相溝通時，其資料必須先傳遞至核心網路後，再由Internet傳送至目的 UE，導致較長的延遲(Latency)。雖然目前已有兩種本地IP封包存取(Local IP Access)機制被提出，但 其一有存取連線數的限制，而另一則有較長的傳輸延遲。為此，本論文在LTE網路中，提出一改良式的本地IP封包存取(Local IP Access)機制，在UE與HeNB間建立Detection Radio Bearer，以偵測目 的地為本地位址的封包，並在偵測到此封包時，轉為Dedicated Transmission Radio-Bearer，以專門 服務處於同HeNB之該對UEs的連線。其繞送方式是利用查表將本地IP封包轉發至本地UE，達成本 地封包快速傳輸。模擬結果證明此改良機制有最小的傳輸延遲，可以支援最多條本地封包存取的連線。

The need for multimedia communication through wireless media brings development of 4G cellular wireless networks. Long Term Evolution (LTE) is one of 4G standards and specified in 3GPP. In an LTE system, home base station (HeNB) is designed for indoor usage. Since packets are always routed back to the core network before to destination, if two user equipments (UEs) stay in the same HeNB, the routing path is detour and results in longer packet delivery delay, jitters and thus lower data throughput. As a result, the idea of local IP Access (LIPA) was drawn and two solutions have been proposed. However, the two solutions would suffer from poor voice quality in a VoIP application. We propose a novel solution which establishes an additional radio bearer (RB) between UE and HeNB to detect local packets. Once local packets are detected, the data radio bearer is then responsible for local packet delivery. Simulation results show that our method outperforms the other two solutions in terms of packet delivery delay.