Issues in the Use of Subcast-based Multicast Error Recovery for Reliable and Continuous Media Data Dissemination

利用子群播為主的錯誤回復機制在可靠及連續性媒體資料傳播上之探討

王信仁(Hsin-Jen Wang) ； 林志彥(Chih-Yen Lin)

《宜蘭技術學報》 9期電機資訊專輯 (2002/12) Pp. 75-90

https://doi.org/10.6179/nit.eec.2002.09.19

摘要

在許多以重傳為主的可靠群播機制中，子群播（subcast）為主的錯誤回復機制是一種較新的做法。在此機制中，如何將一個大的群播群組切成子群組，再將這些子群組組織起來成為某一類型的邏輯子群組結構（又稱為虛擬子群組結構），會對錯誤回復機制的效能有很大的影響。在本論文中，我們將探討在可靠及連續性媒體資料的傳播中，不同的子群組架構對於子群播為主的錯誤回復機制的影響。從實驗模擬結果中我們可了解一個好的子群組架構之組成要素。

關鍵字

群播 ； 子群播 ； 子群組 ； 錯誤回復 ； 子群組結構

並列摘要

Subcast-based error recovery strategy is a recent and very promising development in retransmission-based error recovery strategies. In this strategy, organizing a large multicast group into logical subgroups and structuring them into some kind of logical subgroup order, called virtual subgroup structure (VGS), have important effects on system performance. In this paper, we investigate effects of subgroup structures on the performance of this class of subcast-based error recovery strategies to understand the underlying principles of subgroup formation for subcast-based error recovery, both for reliable and continuous media (CM) type of data dissemination. We use extensive simulations in our work. From the results of simulations, we demonstrate what constitutes good subgroup structures in general. We also give general statements of good retransmission-based continuous media content delivery strategies for both unicast-based error recovery strategy (such as STORM [9]), and subcast-based error recovery strategies.

並列關鍵字

multicast ； subcast ； subgroup ； error-recovery ； subgroup structure