Industrial Technology Research Institute

Chien-Hsin Wang

Jen-Shun Yang

Chien-Chao Tseng

Jen-Chi Liu

Jui-Tang Wang

A method and system for applying a multi-protocol label switching (MPLS) network to support QoS in general packet radio service (GPRS) is disclosed. An E-LSP tunnel with reserved bandwidth is pre-configured between Gateway GPRS Support Node (GGSN) and each Service GPRS Support Node (SGSN), and between any two SGSNs. Before an Mobile Station (MS) wishes to transmit or receive packets, it need to ask its designated SSGN for establishing an on-demand L-LSP from the SGSN to the Corresponding Node (CN). This L-LSP is required to tunnel through the pre-configured E-LSP that was mentioned above and here we apply the label stack technique from MPLS. Therefore, the packets of the on-demand L-LSP can be tunneled through the pre-configured E-LSP to the SGSN in which the MS is located, and then the SGSN is able to recognize and locate the mobile station according to the corresponding label in on-demand L-LSP.

Method and system for applying an MPLS network to support QoS in GPRS

The present invention discloses a method for applying a multi-protocol label switching (MPLS) network in general packet radio service (GPRS). The MPLS network is established by multiple differentiated service (DS) domains. Each DS domain is constructed by multiple label switching routers (LSRs) and label edge routers (LERs). The LER provides at least a service GPRS supporting node (SGSN) connected to a wireless network base station, and a gate GPRS supporting node (GGSN) connected to a packet switching network. At a signalling plane, IP addresses of all SGSNs and GGSNs are utilized to establish all one-to-one pre-created label switching paths (LSPs) in the MPLS network of the GPRS backbone network. At a transmission plane, the pre-created LSP and LSP tunneling transmit packets between SGSN and GGSN.

Growing community of inventors

Taipei County, Taiwan

Chien-Hsin Wang