System and method for enabling session context continuity of local service availability in local cellular coverage

A method for reallocation in a mobility management entity of a network in which simultaneous use of multiple serving gateways is supported, the method comprising:

• receiving a request for a handover;
• determining a connectivity type of a first session context;
• responsive to said determination:
• sending a request to create a second session context to a target serving gateway (S-GW) that includes context information;
• receiving a response that includes information to enable creation of the second session context;
• sending a request to delete a first session context of local connectivity with a local serving gateway (LS-GW);
• receiving a response that indicates that the first session context of local connectivity has been deleted, wherein the target S-GW is already being used for at least one session and sending the request to create a second session context to the target S-GW comprises:
• sending a request to create the second session context of a session served by a local serving gateway (LS-GW) via the S-GW in addition to a first session context.

A method for reallocation in a mobility management entity of a network in which simultaneous use of multiple serving gateways is supported, the method comprising:

• receiving a request for a handover;
• determining a connectivity type of a first session context;
• responsive to said determination:
• sending a request to create a second session context to a target serving gateway (S-GW) that includes context information;
• receiving a response that includes information to enable creation of the second session context;
• sending a request to delete a first session context of local connectivity with a local serving gateway (LS-GW);
• receiving a response that indicates that the first session context of local connectivity has been deleted, wherein if there is a current session with a current S-GW, which is different from the target S-GW, in addition to the current session with the LS-GW, the method further comprising:
• sending a request to delete the current session with the current S-GW;
• receiving a response that indicates that the current session with the current S-GW has been deleted.

A method for reallocation in a mobility management entity of a network in which simultaneous use of multiple serving gateways is supported, the method comprising:

• receiving a request for a handover;
• determining a connectivity type of a third session context;
• responsive to said determination:
• sending a request to create a second session context to a target local serving gateway (LS-GW);
• receiving a response that includes information to enable creation of the second session context;
• sending a request to delete a third session context with a core network (CN) serving gateway (S-GW);
• receiving a response that indicates that the third session context has been deleted;
• CN S-GW maintaining a first session context,
• wherein the third session context includes information of a session to a local packet gateway (LP-GW) and the second session context includes information of the session to the LP-GW.