Heterogeneous network handover-support mechanism
Methods and mechanisms enhance heterogeneous media independent handover (MIH) between different link layer technologies. Embodiments include using an MIH proxy entity, MIH capable network controller, and an MIH server. Enhancements are made to the query phase, preparation phase, execution phase and completion phase by including required information in MIH messages.
1. A method implemented in a network node for heterogeneous handover of a wireless transmit/receive unit (WTRU) from a source network to a target network, the method comprising:
a media independent handover function (MIHF) in conjunction with a processor sending a request message to reserve resources in the target network, wherein the request includes a first transparent container including a radio access technology (RAT) specific configuration for admitting a new connection at the target network and reserving resources; and
the MIHF and the processor receiving a confirmation message including a second transparent container that indicates a RAT specific configuration of reserved resources at the target network, the second transparent container including information related to a synchronization indication.
2. The method of claim 1 , wherein the request message is sent to an enhanced Node B (eNB), a radio network controller (RNC), or a mobile switching center (MSC), a serving general packet radio service (GPRS) support node (SGSN), or a mobility management entity (MME).
3. The method of claim 2 , wherein the request message is sent to the SGSN on a Gb interface or an Iu interface.
4. The method of claim 1 , wherein the request message is a MIH_N2N_HO_Commit request message.
5. The method of claim 1 wherein the confirmation message is a MIH_N2N_HO_/Commit response message.
6. The method of claim 1 , further comprising:
in response to the confirmation message, the MIHF and the processor sending the WTRU a MIH handover message including a third transparent container that indicates a RAT specific configuration of reserved resources at the target network.
7. The method of claim 1 , wherein the request message is a Net_HO_Commit request message.
8. A wireless transmit/receive unit (WTRU), comprising:
a transceiver configured to:
receive a media independent handover (MIH) handover message including a transparent container that indicates a radio access technology (RAT) specific configuration of reserved resources at a target network for handover, the transparent container including information related to a synchronization indication; and
perform a handover to the target network based on the MIH handover message.
9. The WTRU of claim 8 wherein the MIH handover message is a Net_HO_Commit request message.
10. The WTRU of claim 8 wherein the transparent container further includes information related to at least one of: a Normal Cell Indication (NCI); a ARFCN, BSIC-BCCH frequency, and BSIC of a cell; a CCN Support Description; frequency parameters; extended dynamic allocation; a Network Control Order; an RLC reset; a packet timing advance; an UL control timeslot; GPRS or EGPRS mode; UL/DL TBF information; a NAS container.
11. The WTRU of claim 8 wherein the transparent container includes information related to at least one of: WTRU identity; a ciphering algorithm; RB information; UL/DL transport channel information; UL radio resources; DL radio resources; frequency; and maximum allowed UL transmit power.
12. A method implemented in a wireless transmit/receive unit (WTRU), the method comprising:
receiving a media independent handover (MIH) handover message including a transparent container that indicates a radio access technology (RAT) specific configuration of reserved resources at a target network for handover, the transparent container including information related to a synchronization indication; and
performing a handover to the target network based on the MIH handover message.
13. The method of claim 12 wherein the MIH handover message is a Net_HO_Commit request message.
14. The method of claim 12 wherein the transparent container further includes information related to at least one of: a Normal Cell Indication (NCI); a ARFCN, BSIC-BCCH frequency, and BSIC of a cell; a CCN Support Description; frequency parameters; extended dynamic allocation; a Network Control Order; an RLC reset; a packet timing advance; an UL control timeslot; GPRS or EGPRS mode; UL/DL TBF information; a NAS container.
15. The method of claim 12 wherein the transparent container includes information related to at least one of: WTRU identity; a ciphering algorithm; RB information; UL/DL transport channel information; UL radio resources; DL radio resources; frequency; and maximum allowed UL transmit power.