標題: An All-MPLS approach for UMTS 3G core networks
作者: Chueh, HS
Wang, KC
資訊工程學系
Department of Computer Science
關鍵字: UMTS;core networks;GPRS;GTP-tunnel;MPLS-tunnel;traffic engineering;QoS
公開日期: 2003
摘要: In this paper, we present an all-MPLS approach for UMTS 3G core networks. GTP-tunnel has been defined by 3GPP as the transport mechanism for UMTS. For each packet transmission, extra GTP, UDP, and IP headers (40-byte) are required. For short packets, such as VoIP payloads, transmission overhead is very high. Enhanced-GTP was proposed to eliminate the need for a GTP header. Since its operation mode is limited to non-transport mode only, NAT is required in GGSN. Furthermore, its performance improvement is limited, because an extra IP header (20-byte) is still needed. In response to these drawbacks, we propose to integrate MPLS technology to UNITS 3G core networks. We use MPLS-tunnel as the transport mechanism by using two-level MPLS labels (8-byte) to replace the GTP-tunnel. To the best of our knowledge, this is a novel approach, since no MPLS-based approach was ever proposed for UMTS 3G core networks. Our approach is feasible, since more and more routers are MPLS-capable. By reducing header overhead from 40-byte to 8-byte, our new approach improves transmission efficiency from 56.5% similar to 63% to 86.6% similar to 89.5% for VoIP payloads and also enhance packet forwarding efficiency. In addition, our all-MPLS approach offers better load balancing, better service resilience, and better QoS support, compared to existing approaches.
URI: http://hdl.handle.net/11536/18510
ISBN: 0-7803-7954-3
ISSN: 1090-3038
期刊: 2003 IEEE 58TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS1-5, PROCEEDINGS
起始頁: 2338
結束頁: 2342
Appears in Collections:Conferences Paper