Internetworking of cellular radio networks and wireless data networks

A method to be used by a User Terminal, UT, for assisting a handover of a data session from a first routing path associated with a first radio access network and a first data port of said UT, to an alternative routing path associated with an alternative radio access network and a second data port of said UT, said data session uniquely identified by a session identifier at said UT, said first data port associated with a first routing identifier according to a first radio access network standard protocol routing scheme, said second data port associated with an alternative routing identifier according to an alternative radio access network protocol routing scheme, wherein said UT is arranged to route data of said data session to a network node over said first routing path by binding said session identifier to said first routing identifier, said first routing identifier associated with said UT at said network node, said method comprising the following steps:

• forming a capability message uniquely identifying said UT according to a standard protocol routing scheme of said first access network and according to a protocol routing scheme of said alternative radio access network, said capability message indicating that said UT is capable of establishing a data session through said alternative radio access network,
• sending said capability message to said network node over said first or alternative routing path, and
• utilising an MRRM, Multi Radio Resource Management, application provided in the UT for retrieving radio resource management parameters from the alternative network, on which parameters handover decision is based.

A User Terminal, UT, for assisting a handover of a data session from a first routing path associated with a first radio access network and a first data port of said UT, to an alternative routing path associated with an alternative radio access network and a second data port of said UT, said data session uniquely identified by a session identifier at said UT, said first data port associated with a first routing identifier according to a first radio access network standard protocol routing scheme, said second data port associated with an alternative routing identifier according to an alternative radio access network protocol routing scheme, said UT being arranged to route data of said data session to a network node over said first routing path by binding said session identifier to said first routing identifier, wherein said first routing identifier is associated with said UT at said network node wherein said UT is operative to:

• form a capability message uniquely identifying said UT according to a standard protocol routing scheme of said first access network and according to a protocol routing scheme of said alternative radio access network, said capability message indicating that said UT is capable of establishing a data session through said alternative radio access network,
• send said capability message to said network node over said first or alternative routing path, and
• utilize an MRRM, Multi Radio Resource Management, application provided in the UT for retrieving radio resource management parameters from the alternative network, on which parameters handover decision is based.

A non-transitory computer readable medium having stored program code means which, when loaded into a processing means of a User Terminal, UT, make said processing means execute at least one procedure for assisting a handover of a data session from a first routing path associated with a first radio access network and a first data port of said UT, to an alternative routing path associated with an alternative radio access network and a second data port of said UT, said data session uniquely identified by a session identifier at said UT, said first data port associated with a first routing identifier according to a first radio access network standard protocol routing scheme, said second data port associated with an alternative routing identifier according to an alternative radio access network protocol routing scheme, wherein said UT is arranged to route data of said data session to a network node over said first routing path by binding said session identifier to said first routing identifier, said first routing identifier associated with said UT at said network node, said procedure comprising:

• forming a capability message uniquely identifying said UT according to a standard protocol routing scheme of said first access network and according to a protocol routing scheme of said alternative radio access network, said capability message indicating that said UT is capable of establishing a data session through said alternative radio access network,
• sending said capability message to said network node over said first or alternative routing path, and
• utilising an MRRM, Multi Radio Resource Management, application provided in the UT for retrieving radio resource management parameters from the alternative network, on which parameters handover decision is based.

A method to be used by a network node for assisting a handover of a data session from a first routing path, associated with a first access network and a first data port of said network node, to an alternative routing path, associated with an alternative access network and a second data port of said network node, wherein said network node is arranged to route data of said data session over said first access network via said first data port, to a User Terminal, UT, by binding a session identifier identifying said data session to a first routing identifier, wherein said session identifier and said first routing identifier are defined in accordance with a standard protocol routing scheme of said first access network, said method comprising the following steps:

• receiving a capability message uniquely identifying said UT according to a standard protocol routing scheme of said alternative access network, said capability message indicating that said UT is capable of communicating data of said data session through said alternative access network,
• creating an alternative routing identifier for said data session complying with the standard protocol routing scheme of said alternative access network and associating said alternative routing identifier with said UT and said second data port,
• associating at least said session identifier with said alternative routing identifier, and
• utilising an MRRM, Multi Radio Resource Management, application provided in the UT for providing the network node with radio resource management parameters received from an AP of the alternative radio access network, and/or MRRM parameters measured by the UT, on which parameters a handover decision in the network node is based, or,
• utilising the MRRM application provided in the UT for taking a handover decision in the UT on the basis of radio resource management parameters received from an AP of the alternative radio access network, and/or MRRM parameters measured by the UT.

A non-transitory computer readable medium having stored program code means which, when loaded into a processing means of a network node make said processing means execute at least one procedure for assisting a handover of a data session from a first routing path, associated with a first access network and a first data port of said network node, to an alternative routing path, associated with an alternative access network and a second data port of said network node, wherein said network node is arranged to route data of said data session over said first access network via said first data port, to a User Terminal, UT, by binding a session identifier identifying said data session to a first routing identifier, wherein said session identifier and said first routing identifier are defined in accordance with a standard protocol routing scheme of said first access network, said procedure comprising:

• receiving a capability message uniquely identifying said UT according to a standard protocol routing scheme of said alternative access network, said capability message indicating that said UT is capable of communicating data of said data session through said alternative access network,
• creating an alternative routing identifier for said data session complying with the standard protocol routing scheme of said alternative access network and associating said alternative routing identifier with said UT and said second data port,
• associating at least said session identifier with said alternative routing identifier, and
• utilising an MRRM, Multi Radio Resource Management, application provided in the UT for providing the network node with radio resource management parameters received from an AP of the alternative radio access network, and/or MRRM parameters measured by the UT, on which parameters a handover decision in the network node is based, or,
• utilising the MRRM application provided in the UT for taking a handover decision in the UT on the basis of radio resource management parameters received from an AP of the alternative radio access network, and/or MRRM parameters measured by the UT.

A network node for assisting a handover of a data session from a first routing path, associated with a first access network and a first data port of said network node, to an alternative routing path, associated with an alternative access network and a second data port of said network node, said network node being arranged to route data of said data session over said first access network via said first data port, to a User Terminal, UT, by binding a session identifier identifying said data session to a first routing identifier, wherein said session identifier and said first routing identifier are defined in accordance with a standard protocol routing scheme of said first access network;

• said network node comprising processing means being further arranged to carry out the following steps:
• receiving a capability message uniquely identifying said UT according to a standard protocol routing scheme of said first access network and according to an alternative protocol routing scheme of said alternative access network, said capability message indicating that said UT is capable of establishing a data session through said alternative access network,
• creating an alternative routing identifier for said data session complying with the alternative protocol routing scheme of said alternative access network and associating said alternative routing identifier with said UT and said second data port,
• associating at least said session identifier with said alternative routing identifier, and
• receiving from the UT, for the purpose of a handover decision by the network node, either a measurement report, wherein measurements in said measurement report are performed by a Multi Radio Resource Management, MRRM, application provided in the UT, or radio resource management parameter received by the UT from an AP of the alternative radio access network;
• or
• receiving from the UT a handover decision taken by the MRRM application provided in the UT on the basis of radio resource management parameters received from an AP of the alternative radio access network, and/or MRRM parameters measured by the UT,
• wherein said first access network is a cellular radio network, said first routing identifier is a radio bearer identity, and wherein said radio bearer identity and said session identifier are defined by a cellular radio network standard protocol routing scheme, and wherein said capability message comprises a network address, NA, associated with said UT, in accordance with a standard protocol routing scheme of said alternative access network,
• said processing means further arranged to carry out the following steps:
• receiving an association message comprising said NA, said association message indicating that there is an established radio communication connection between said UT and said alternative access network associated with said second data port,
• associating said NA with said second data port,
• creating an alternative radio bearer identity defining a data communication connection between said network node and said UT for said data session, through said alternative access network via said second data port,
• defining said alternative routing identifier to be said alternative radio bearer identity,
• associating said alternative radio bearer identity with said session identifier, said NA and said second data port,
• deciding to route said data session to said UT through said alternative routing path, via said second data port through said alternative access network, and
• binding said session identifier to said alternative radio bearer identity, thereby routing data of said data session through said alternative routing path, via said second data port through said alternative access network.

A method to be used by a User Terminal, UT, for assisting a handover of a data session from a first routing path associated with a first radio access network and a first data port of said UT, to an alternative routing path associated with an alternative radio access network and a second data port of said UT, said data session uniquely identified by a session identifier at said UT, said first data port associated with a first routing identifier according to a first radio access network standard protocol routing scheme, said second data port associated with an alternative routing identifier according to an alternative radio access network protocol routing scheme, wherein said UT is arranged to route data of said data session to a network node over said first routing path by binding said session identifier to said first routing identifier, said first routing identifier associated with said UT at said network node, said method comprising the following steps:

• forming a capability message uniquely identifying said UT according to a standard protocol routing scheme of said first access network and according to a protocol routing scheme of said alternative radio access network, said capability message indicating that said UT is capable of establishing a data session through said alternative radio access network,
• sending said capability message to said network node over said first or alternative routing path,
• utilising an MRRM, Multi Radio Resource Management, application provided in the UT for retrieving radio resource management parameters from the alternative radio access network, on which parameters handover decision is based,
• wherein said first radio access network is a cellular radio network, said alternative radio access network is a wireless data network, said session identifier and said first routing identifier are radio bearer identities defined by a cellular radio network standard protocol routing scheme, and wherein said alternative routing identifier is associated with a network address, NA, of said UT, wherein said NA is defined in accordance with a standard protocol routing scheme of said wireless data network,
• wherein said capability message is sent to said network node over said first routing path via said first data port,
• said method further comprising the following steps:
• establishing a radio communication connection with said alternative radio access network via said second data port,
• forming an association message comprising said NA, said association message indicating that there is an established radio communication connection between said UT and said alternative radio access network,
• sending said association message to said network node,
• receiving a message comprising a Network Source Address (NSA) associated with said network node and said alternative routing path,
• extracting said NSA from said capability message,
• associating said session identifier with said alternative routing identifier, with said NSA and with said second data port,
• deciding to route data of said data session through said alternative radio access network routing path via said second data port, and
• binding said session identifier to said alternative routing identifier, thereby routing data of said data session through said alternative radio access network routing path via said second data port.

A method to be used by a network node for assisting a handover of a data session from a first routing path, associated with a first access network and a first data port of said network node, to an alternative routing path, associated with an alternative access network and a second data port of said network node, wherein said network node is arranged to route data of said data session over said first access network via said first data port, to a User Terminal, UT, by binding a session identifier identifying said data session to a first routing identifier, wherein said session identifier and said first routing identifier are defined in accordance with a standard protocol routing scheme of said first access network, said method comprising the following steps:

• receiving a capability message uniquely identifying said UT according to a standard protocol routing scheme of said alternative access network, said capability message indicating that said UT is capable of communicating data of said data session through said alternative access network,
• creating an alternative routing identifier for said data session complying with the standard protocol routing scheme of said alternative access network and associating said alternative routing identifier with said UT and said second data port,
• associating at least said session identifier with said alternative routing identifier, and
• utilising an MRRM, Multi Radio Resource Management, application provided in the UT for providing the network node with radio resource management parameters received from an AP of the alternative radio access network, and/or MRRM parameters measured by the UT, on which parameters a handover decision in the network node is based, or,
• utilising the MRRM application provided in the UT for taking a handover decision in the UT on the basis of radio resource management parameters received from an AP of the alternative radio access network, and/or MRRM parameters measured by the UT,
• wherein said first access network is a cellular radio network, said first routing identifier is a radio bearer identity, and wherein said radio bearer identity and session identifier are defined by a cellular radio network standard protocol routing scheme, and wherein said capability message comprises a network address, NA, associated with said UT, in accordance with said standard protocol routing scheme of said alternative access network,
• said method further comprising the following steps:
• receiving an association message comprising said NA, said association message indicating that there is an established radio communication connection between said UT and said alternative access network associated with said second data port,
• associating said NA with said second data port,
• creating an alternative radio bearer identity defining a data communication connection between said network node and said UT for said data session, through said alternative access network via said second data port,
• defining said alternative routing identifier to be said alternative radio bearer identity,
• associating said session identifier with said alternative radio bearer identity, said NA and said second data port,
• deciding to route said data session to said UT through said alternative routing path, via said second data port through said alternative access network, and
• binding said session identifier to said alternative radio bearer identity, thereby routing data of said data session through said alternative routing path, via said second data port through said alternative access network.