초록 ▼

The invention relates to a cellular packet radio. network and to a method for updating a routing area in a packet radio network. Packet radio support nodes (SGSN) are connected to a digital cellular radio network (BSS), which provides a radio interface for the support nodes for packet-switched data

The invention relates to a cellular packet radio. network and to a method for updating a routing area in a packet radio network. Packet radio support nodes (SGSN) are connected to a digital cellular radio network (BSS), which provides a radio interface for the support nodes for packet-switched data transmission between the support nodes and mobile stations. There is a logical link between a mobile station (MS) and a serving packet radio support node (SGSN). The packet radio network utilizes logical routing areas, each of which comprises one or more cells. Each cell broadcasts information on the routing area to which it belongs. The mobile station sends a routing area update request to the packet radio network when it roams to a new cell which belongs to a different routing area than the old cell. The update request includes the identifiers of the old and new routing area. When the packet radio node detects a routing area update carried out by an unknown mobile station, it sends information on the change of the packet radio node to the mobile station (9, 12). The mobile station then starts a local procedure in the mobile station a network-level procedure (13, 14) with the new support node in order to update the logical link between them for data transmission.

대표청구항 ▼

The invention relates to a cellular packet radio. network and to a method for updating a routing area in a packet radio network. Packet radio support nodes (SGSN) are connected to a digital cellular radio network (BSS), which provides a radio interface for the support nodes for packet-switched data

The invention relates to a cellular packet radio. network and to a method for updating a routing area in a packet radio network. Packet radio support nodes (SGSN) are connected to a digital cellular radio network (BSS), which provides a radio interface for the support nodes for packet-switched data transmission between the support nodes and mobile stations. There is a logical link between a mobile station (MS) and a serving packet radio support node (SGSN). The packet radio network utilizes logical routing areas, each of which comprises one or more cells. Each cell broadcasts information on the routing area to which it belongs. The mobile station sends a routing area update request to the packet radio network when it roams to a new cell which belongs to a different routing area than the old cell. The update request includes the identifiers of the old and new routing area. When the packet radio node detects a routing area update carried out by an unknown mobile station, it sends information on the change of the packet radio node to the mobile station (9, 12). The mobile station then starts a local procedure in the mobile station a network-level procedure (13, 14) with the new support node in order to update the logical link between them for data transmission. [Other References] M.O. Rabin, Efficient dispersal of information for security, load balancing, and fault tolerance. Jrn. ACM, 36-2:335-348, 1989. Bolot et al., "Adaptive FEC-Based Error Control for Internet Telephony", 8 pages. S. Jamaloddin Golestani et al, To appear in Proceed. Of ICNP, Oct. 98, "A Class of End-to-End Congestion Control Aigoriths for the Internet." D. Clark and J. Wroclawski. "An approach to service allocation in the internet." Internet Draft, page Jul., 1997. David D. Clark et al. "Explicit Allocation of Best Effort Packet Delivery Service." V.P. Kumar et al., "Beyond Best Effort: Router Architectures for the Differentiated Services of Tomorrow's Internet". Ion Stoica et al.; "LIRA: An Approach for Service Differentiation in the Internet." Lixia Zhang et al., "RSVP: A New Resource ReSerVation Protocol"; IEEE Network, Sep. 1993. K. Nichols et al.; "A Two-bit Differenntiated Services Architecture for the Internet"; Internet Draft, Page Nov. 1997.