Method for establishing multi-PDN (packet data network) connection in mobile relay and system for realizing same

Abstract

The invention discloses a method for establishing multi-PDN (packet data network) connection in a mobile relay and a system for realizing the same. In the method, when an RN (relay node) enters a new tracking area and initiates a tracking area update process, an MME (mobility management entity) determines whether the RN needs to establish new PDN connection based on judgment foundation information; if so, the MME adds a parameter to a tracking area update receiving message in the tracking area update process, and indicates the RN to initiate a new PDN connection establishing process; and after receiving the tracking area update receiving message, the RN initiates a PDN connection establishing process to establish new PDN connection based on the PGW ( packet data network gateway) of the current DeNB (donor evolved Node B). Therefore, the RN dispenses with PGW relocation in the movement process, and the most suitable PGW can be selected for serving the RN along with the movement of the RN, thus the problem that the RN initiates a new PDN connection establishing process is solved, and the service experience of a user is ensured.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and system for establishing a multi-packet data network connection of a mobile relay. Background technique [0002] 3GPP introduced a relay (Relay) implementation scheme in R10, which provides the function of a donor base station in the eNB, connects one or more RNs (Relay Node, relay node), and provides better coverage extension services for the network. [0003] In the R10 architecture, the implemented RN is a fixed node, and the RN itself cannot move. Because the PGW (Packet Data Network Gateway, packet data network gateway) / SGW (Serving GW, serving gateway) function of the RN is integrated in the DeNB (Donor eNB, donor base station). Wherein, MME (Mobility Management Entity, Mobility Management Entity) is a signaling entity, mainly responsible for functions such as mobility management, bearer management, user authentication, selection of SGW and PGW. If the RN m...

AI Technical Summary

Problems solved by technology

[0008] Although this method solves the problem that the PGW cannot be changed when the RN moves, as the RN moves farther and farther away, the path of the data plane will become longer and longer

Therefore, this method alone cannot solve the mobility problem of RN under the R10 architecture

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