劉毅+劉紅梅



【摘 要】超密集網絡部署將是滿足未來5G移動網絡數據流量及用戶體驗速率需求的主要技術手段之一,為此,開展了面向5G網絡構架的密集組網實踐與研究,把架構集中化的理念應用到網絡建設中,提出了在超密集網絡的環境下,通過局部區域內的BBU集中化部署,提升系統整體容量和資源整體利用率,改善用戶體驗,從而在預埋5G網絡集中化架構的同時降低運營成本。
【關鍵詞】5G網絡架構;超密集組網;BBU
Practice and Research on Intensive Networking for 5G Network Architecture
LIU Yi, LIU Hongmei
(China Mobile Group Shandong Co., Ltd., Jinan 250001, China)
[Abstract] The deployment of ultra-dense network will be one of the major technical means to meet the requirements of data traffic and user experience rate for 5G mobile networks in the future. Therefore, the practice and research on intensive networking for 5G network architecture was carried out in this paper. The concept of centralized architecture was applied to the network construction. The centralized deployment of BBU in a local area was proposed under the environment of ultra-dense network to improve the overall system capacity, resource utilization and the user experience. The operating costs were reduced in the embedded centralized 5G network architecture.
[Key words]5G network architecture; ultra-dense network; BBU
1 引言
隨著移動互聯網和物聯網的高速發展,業務的需求將驅動5G無線網絡提供更高的速率、更多的終端連接。據預測,未來5G網絡數據流量需求將提升1 000倍,用戶感知速率需求將提升10~100倍。除了常規的提升頻譜利用率方法外,通過超密集組網提升空間復用度的方式來提升無線系統容量已成為主要技術手段。UDN(Ultra Dense Deployment,超密集組網)通過密集化的小區部署,在局部熱點區域實現百倍量級的系統容量提升,將是滿足2020年以及未來移動數據流量需求的主要技術手段之一。
UDN可以帶來可觀的容量增長,然而在實際部署中UDN面臨著巨大的挑戰:一方面,隨著小區密度的增加,小區間的干擾問題更加突出,干擾是制約UDN性能最主要的因素,尤其是控制信道的干擾直接影響整個系統的可靠性;另一方面,用戶的切換率和切換成功率是網絡重要的KPI指標,隨著小區密度的增加,基站之間的間距逐漸減小,這將導致用戶的切換次數和切換失敗率顯著增加,嚴重影響用戶感知。……