UMTS系統群播服務之無線電資源分配之研究

Abstract

3GPP 23.246 定義了多媒體廣播及群播服務 (MBMS) 標準來有效率地在 UMTS 的核心網路中傳遞多媒體群播內容。在 MBMS 中，網路可能開啓共同邏輯頻道 (common logical channel) 來同時服務多個MBMS 使用者。然而使用共同邏輯的頻道可以造成專用邏輯頻道(dedicated logical channel) 很高的干擾。為了有效率使用無線電資源來服務傳統通話 (traditional calls) 及多媒體廣播及群播服務通話(MBMS calls) ，在本論文中提出兩個頻道分配演算法，群播資源保留機制 (Reserved Resource for Multicasting: RRM) 及 群播資源不保留機制 (Unreserved Resource for Multicasting: URM)。並且實做兩個模擬模型來評估此兩機制之效能。 關鍵字：資源分配、模擬模型、UMTS 群播服務

3GPP 23.246 defines the Multimedia Broadcast and Multicast Service (MBMS) standard to efficiently deliver multimedia multicasting content over the Universal Mobile Telecommunication System (UMTS). In MBMS, the network may turn on the common logical channel to serve multiple MBMS users at the same time. However, the usage of the common logical channel may cause high interference to the dedicated control channel (that are used to serve the traditional calls). To more efficiently utilize the radio resource to serve both traditional calls and MBMS calls, in this thesis, we propose two channel allocation algorithm: Reserved Resource for Multicasting (RRM) and Unreserved Resource for Multicasting (URM). Two simulation models are conducted to investigate the performances of the RRM and URM algorithms. Keywords: Resource Allocation, Simulation Models, and UMTS Multicast Service