摘 要:無源光網絡一直被認為是光接入網中頗具應用前景的技術,它打破了傳統的點到點接入方法,在解決寬帶接入問題上是一種經濟的、面向未來多業務的用戶接入技術。目前用于寬帶接入的PON技術主要有ATM PON、Ethernet PON、和GPON。隨著因特網的快速發展和以太網的大量使用,針對APON標準過于復雜、在傳送以太網和IP數據業務時效率低和EPON無法對傳送實時業務提供高質量保證、缺乏電信級的網絡監控等缺陷,由FSAN組織在2002年9月提出了具有高速率、高效率、支持多業務傳輸的吉比特無源光網絡GPON。伴隨著通信業務形式的改變,用戶對整個通信網絡的要求越來越高。作為最新技術的GPON能比較好地滿足接入網的要求,有望成為下一代網絡系統的主要接入技術。
關鍵詞:GPON; 移動通信; 接入網; GFP
中圖分類號:TN915文獻標識碼:A
文章編號:1004-373X(2010)15-0077-03
Research of GPON Technology in Mobile Network
LI Li1, ZHANG He1,WU Yao2, XIE Yu1, LI Ling1
(1.Southwest Petroleum University, Chengdu 610500, China; 2.Material Management Center of Western Drilling Company, Urumqi, 830026, China)
Abstract: The passive optical network is known as the technology of possessing bright application prospect in the optical access network, which has broken the traditional point to point access method. The currently used broadband access technologies of PON includes ATM PON, Ethernet PON and GPON. With the rapid development of Internet and the extensive use of Ethernet, since APON criteria is too complex, the transmission efficiency of Ethernet or IP data is low, and EPON is unable to transmit real-time business with high-quality assurance and lacks the network defects monitoring, FASN organization in September 2002 proposed the high-speed ande high-efficiency Gigabit passive optical network(GPON) supporting the multi-service transmission. Accompanied with the changes in the form of communication services, the requirement of the users becomes increasingly high for the communication networks. GPON as the latest technology can meet the requirements of the access network and is expected to become a major access technology of the next-generation networks.
Keywords: GPON; mobile communication; access network; GFP
收稿日期:2010-03-24
0 引 言
GPON技術特征主要體現在傳輸匯聚層,很多GPON技術都是在傳輸匯聚層實現的,如測距、上行時隙分配、帶寬分配、安全保障等。盡管GPON在這些PON的基本問題也有其特點,但其傳輸匯聚層的最大特色是采用了全新的傳輸匯聚層協議——GFP技術。
從GPON的技術特點可以看出,相對于其他PON系統,GPON的高帶寬,對TDM業務天然的支持能力,QoS保證的全業務接入,強大的OAM能力,電信級的管理平臺都為其在接入網的大范圍應用提供了堅實的基礎。目前隨著數據業務的飛速發展,數據接入的可移動性要求不斷突現,支持高帶寬可移動無線數據接入的3G部署已經成為不可扭轉的進程。……