DVB-H廣播網路上的Handover技術

Handover in DVB-H Broadcast Network

焦信達(Hsin-Ta Chiao)

《電腦與通訊》 122期 (2007/12) Pp. 4-9

https://doi.org/10.29917/CCLTJ.200712.0002

摘要

DVB-H的移動管理可以被細分成兩個層面，第一個是handover，第二個則是roaming；本文主要探討的是DVB-H廣播網路上handover的技術。由於在DVB-H的終端裝置上，不一定會擁有雙向無線網路模組的存在（例如：3G或WiMAX），因此，DVB-H廣播網路上的handover方式，是一種terminal-initiated handover。基本上，DVB-H的handover技術，是由傳統DVB-T的handover技術衍生而來的。不過，由於DVB-T上的節目是透過MPEG-2 transport stream傳送的，但DVB-H上的節目則是透過IP-based protocol傳送的，因此，原本DVB-T上的handover技術，必須針對在DVB-H廣播網路上的IP位址解析方式進行擴充。此外，在DVB-H終端裝置上針對handover所監測的參數，也是專為DVB-H廣播網路所評估選擇的。在本文中，我們將會說明DVB-H廣播網路上handover技術的原理、流程及相關的運作參數。

關鍵字

行動電視 ； DVB-IPDC標準 ； OMA BCAST標準

並列摘要

Mobility management of DVB-H can be further divided into two aspects: The first one is handover, and the second one is roaming. In this paper, we discuss a technical approach for handover on DVB-H broadcast networks. Since bi-directional wireless network modules (e.g. 3G or WiMAX) may not be available on a DVB-H terminal device, the approach for DVB-H handover belongs to terminal-initiated handovers. In fact, the approach for DVB-H handover is derived from the approach for handover on traditional DVB-T broadcast networks. However, since the TV programs of DVB-T are transmitted via MPEG-2 Transport Stream, and in contrast the TV programs of DVB-H are transmitted via IP-based protocols, the technical approach for DVB-T handover has to be extended to accommodate IP address resolution over DVB-H broadcast networks. In addition, the handover parameters monitored on a DVB-H terminal device are also specific to the DVB-H broadcast networks. This paper explains the rationales, flows and parameters for DVB-H handover.

並列關鍵字

Mobile TV ； DVB-IPDC Standards ； OMA BCAST Standards