Mobile terminated call improvements
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsChunbo Wang, Yong Yang
Life of this patent
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Abstract
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.
Claims24
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.
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;
- the PGW, as a consequence of determining that the PDN connection has not been relocated to a new SGW, 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;
- the selected SGW receiving the control plane signal transmitted by the PGW;
- the selected SGW determining whether the control plane signal includes a UE identifier and whether the control plane signal includes a mobility management node (MMN) identifier for identifying an MMN;
- the selected SGW, in response to determining that the control plane signal includes a UE identifier,
- (i) forwarding the control plane signal to a plurality of mobile management nodes to which the SGW is connected in the case that the control plane signal does not include an MMN identifier, or
- (ii) forwarding the control plane signal to the MMN identified in the control plane signal in the case that the control plane signal includes the MMN identifier.
A communication system comprising:
- a set of serving gateways (SGWs);
- and
- a packet gateway apparatus (PGW-A) comprising:
- a memory and one or more processors coupled to the memory, wherein the one or more processors are configured to:
- (1) determine whether a Packet Data Network (PDN) connection associated with a restarted serving gateway (SGW) has been relocated to a new SGW as a consequence of the PGW-A receiving a user plane data packet destined for a user entity (UE) associated with the PDN connection and (2) as a consequence of determining that the PDN connection has not been relocated to a new SGW, (i) select a SGW from the set of SGWs and (ii) transmit to the selected SGW a control plane signal comprising a UE identifier for identifying the UE, wherein
- the selected SGW is configured to:
- determine whether a control plane signal transmitted by the PGW-A includes a UE identifier,
- determine whether the control plane signal includes a mobility management node (MMN) identifier for identifying an MMN, and
- in response to determining that the control plane signal includes a UE identifier,
- (i) forward the control plane signal to a plurality of mobile management nodes to which the selected SGW is connected in the case that the control plane signal does not include an MMN identifier, and
- (ii) forward the control plane signal to the MMN identified in the control plane signal in the case that the control plane signal includes the MMN identifier.
Dependencies are inferred from the claim text.