Mobile terminated call improvements

摘要

In one aspect, a method for a packet gateway node (PGW) is disclosed. The PGW being adapted for (a) communicating with at least a serving gateway node, SOW, (b) receiving and forwarding downlink data packets to a user entity, UE, and (c) communicating with a mobility management entity, MME. In one embodiment, the method comprises: the PGW, when receiving a downlink user plane data packet destined for the UE on a Packet Data Network, PDN, connection associated with a restarted SGW, determining if the PDN connection has not yet been relocated to a new SGW, and, if so, selecting at least one SGW from a set of SGWs including the restarted SGW or another SGW and transmitting a control plane signal to at least one of the selected SGWs, the control plane signal identifying at least the UE.

主权项

1. A method in a communications network, the method comprising:
a packet gateway node (PGW) receiving a downlink user plane data packet destined for a user entity (UE) on a Packet Data Network (PDN) connection associated with a restarted serving gateway (SGW); the PGW, as a consequence of receiving the downlink user plane data packet, determining whether the PDN connection has been relocated to a new SGW; and as a consequence of determining that the PDN connection has not been relocated to a new SGW, the PGW i) selecting a SGW from a set of SGWs and ii) transmitting to the selected SGW a control plane signal comprising a UE identifier for identifying the UE and a mobile management node identifier for identifying a mobility management node, wherein the steps of selecting at least one SGW and transmitting to the selected SGW a control plane signal identifying at least the UE are further dependent on that a bearer context, for which the user plane data packet has been received, is preconfigured for allowing PGW initiated control plane signaling based on operator policies.