標題: Performance of CS Fallback for Long Term Evolution Mobile Network
作者: Liou, Ren-Huang
Lin, Yi-Bing
Sung, Yingrong Coral
Liu, Pang-Cheng
Wietfeld, Christian
資訊工程學系
Department of Computer Science
關鍵字: Circuit-switched fallback (CSFB);delayed return (DR) scheme;Long Term Evolution (LTE)
公開日期: 1-十月-2014
摘要: When a mobile operator migrates its network from the third generation (3G) system to Long Term Evolution (LTE), both 3G and LTE will coexist for a period of time. Since the 3G circuit-switched (CS) voice mechanism is more mature and available than that for the LTE Voice over Internet Protocol (VoIP), the operator may consider CS fallback (CSFB) as a solution for providing reliable voice calls. According to the 3G Partnership Project (3GPP) CSFB procedure, when a mobile user in the LTE network has an incoming or an outgoing call, the user equipment (UE) falls back from LTE to Universal Mobile Telecommunications System (UMTS). When the call is complete and released, the UE immediately returns to LTE. If the next activity for the UE is another voice call, immediately switching from UMTS to LTE may not be efficient. In this case, the UE has to perform another CSFB. To resolve this issue, we suggest delaying the returns to avoid unnecessary CSFBs, which is called delayed return (DR). Based on the measurements from the real UMTS and LTE networks, we develop an analytic model for investigating the performance of the CSFB with DR. This paper indicates that the DR scheme can effectively reduce the CSFB costs by up to 60%.
URI: http://dx.doi.org/10.1109/TVT.2014.2302832
http://hdl.handle.net/11536/123980
ISSN: 0018-9545
DOI: 10.1109/TVT.2014.2302832
期刊: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume: 63
起始頁: 3977
結束頁: 3984
顯示於類別:期刊論文


文件中的檔案:

  1. 000344083300043.pdf