Method and apparatus for selected internet protocol (ip) traffic offload (sipto) and local ip access (lipa) mobility

Abstract

Methods and apparatus are described for supporting wireless transmit/receive unit (WTRU) mobility between Home (evolved) Node Bs (H(e)NBs) that are configured to communicate with a Local Gateway (L-GW). The H(e)NBs and/or L-GW may belong to one or more Local H(e)NB Networks (LHNs). A WTRU may receive services including Selected Internet Protocol (IP) Traffic Offload (SIPTO) or Local IP Access (LIPA) services from the L-GW via one or more H(e)NBs. The WTRU may continue to receive SIPTO or LIPA services after a handover to another H(e)NB that may be in communication with the same L-GW and may belong to the same LHN. The WTRU may receive information related to the LHN or the L-GW to allow continuation of SIPTO or LIPA services as the WTRU moves among H(e)NBs and/or out of the LHN. The WTRU may receive and/or maintain one or more LHN Lists.

1 .- 20 . (canceled) 
     
     
         21 . A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
 receiving a service from a Local Gateway (L-GW) via a first base station (BS) that belongs to a Local Home Node B (HNB) Network (LHN);   maintaining (1) an LHN list that includes information related to at least the LHN and (2) a list of allowed Closed Subscriber Group (CSG) identifiers (IDs);   receiving any of information related to the LHN and information indicating whether a second BS is associated with a Service Continuity Area (SCA) to which the first BS is associated;   performing a handover to the second BS based at least on the LHN list and the received message; and   receiving the service from the L-GW via the second BS.   
     
     
         22 . The method of  claim 21 , wherein the SCA is indicated based on any of a list of cell IDs, a list of CSG IDs, a list of Tracking Area IDs (TAIs), and a list of Public Land Mobile Network (PLMN) IDs. 
     
     
         23 . The method of  claim 21 , wherein the SCA is indicated by any of a System Information Broadcast (SIB) message, a Radio Resource Control (RRC) message, and a Network Access Stratum (NAS) message. 
     
     
         24 . The method of  claim 21 , wherein the service includes a Selected Internet Protocol (IP) Traffic Offload (SIPTO) service. 
     
     
         25 . The method of  claim 21 , wherein the service includes a Local Internet Protocol (IP) Access (LIPA) service. 
     
     
         26 . The method of  claim 21 , wherein the LHN list includes an LHN ID of the LHN. 
     
     
         27 . The method of  claim 21 , wherein the LHN list includes information related to LHNs from which the WTRU prefers to receive the service. 
     
     
         28 . The method of  claim 21 , wherein the LHN list includes information related to LHNs that are capable of providing a Selected Internet Protocol (IP) Traffic Offload (SIPTO) service. 
     
     
         29 . The method of  claim 21 , wherein the LHN list includes information related to LHNs that are capable of providing a Local Internet Protocol (IP) Access (LIPA) service. 
     
     
         30 . The method of  claim 21 , wherein the LHN list includes information related to at least one LHN that the WTRU is allowed to access. 
     
     
         31 . The method of  claim 30 , wherein the at least one LHN that the WTRU is allowed to access is determined by an operator of a network. 
     
     
         32 . The method of  claim 21 , wherein the LHN list includes information related to at least one of LHNs or BSs that the WTRU or a user of the WTRU approved for attachment. 
     
     
         33 . The method of  claim 21 , further comprising receiving a detach request message that includes a reattach target, the reattach target indicating that the WTRU should attach to the second BS for the service received from the L-GW. 
     
     
         34 . The method of  claim 21 , wherein the performing the handover further comprises determining that the second BS belongs to the LHN. 
     
     
         35 . The method of  claim 34 , wherein the determining that the second BS belongs to the LHN comprises determining that information related to the LHN is included in the LHN list. 
     
     
         36 . The method of  claim 21 , further comprising stopping the service received from the first BS prior to performing the handover. 
     
     
         37 . The method of  claim 36 , wherein the performing the handover is performed on a further condition that information related to the second BS is included in the list of information related to BSs. 
     
     
         38 . A wireless transmit/receive unit (WTRU) comprising:
 a receiver configured to receive a service from a Local Gateway (L-GW) via a first base station (BS) that belongs to a Local Home Node B (HNB) Network (LHN);   a memory configured to store ( 1 ) an LHN list that includes information related to at least the LHN and ( 2 ) a list of allowed Closed Subscriber Group (CSG) identifiers (IDs);   the receiver configured to receive any of information related to the LHN and information indicating whether a second BS is associated with a Service Continuity Area (SCA) to which the first BS is associated;   a processor configured to perform a handover to the second BS based at least on the LHN list and the received message; and   the receiver configured to receive the service from the L-GW via the second BS.   
     
     
         39 . A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
 maintaining (1) an LHN list that includes information related to at least the LHN and (2) a list of allowed Closed Subscriber Group (CSG) identifiers (IDs);   receiving information on any of: (1) a Local Home Node B (HNB) Network (LHN) ID that identifies an LHN, (2) a Local Internet Protocol (IP) Access (LIPA) indication that indicates whether the LHN supports LIPA services, and (3) a Service Continuity Area (SCA) indication that indicates whether the a cell is associated with a SCA to which the WTRU is associated;   selecting to a cell that belongs to the LHN on a condition including any of: (1) the LHN ID is included in a list of allowed LHNs stored in the WTRU, (2) the LIPA indication indicates that the LHN supports LIPA services, and (3) the cell is associated with the SCA to which the WTRU is associated; and   receiving a service from the cell.   
     
     
         40 . The method of  claim 39 , wherein the SCA is indicated based on any of a list of cell IDs, a list of CSG IDs, a list of Tracking Area IDs (TAIs), and a list of Public Land Mobile Network (PLMN) IDs, and
 wherein the SCA is indicated by any of a System Information Broadcast (SIB) message, a Radio Resource Control (RRC) message, and a Network Access Stratum (NAS) message.