TSG-RAN Workshop on Radio mobility MOB-070002 with non-3GPP radio technologies 28th May 2007, Busan, Korea Improved network controlled mobility with non-3GPP radio technologies –mobility scenarios and requirements Agenda Item: 5. (Non-3GPP/3GPP mobility scenarios and requirements - operators) Source: Telecom Italia, China Mobile Document for: Discussion

Background and assumptions The mobility scenarios of interest are for a limited number of non 3GPP radio access technologies, such as mobile WiMAX, 3GPP2 and WLAN Scope of the Workshop to identify which ones (limited set) The decisions regarding handover are taken by the network (with UE assistance) but not by the terminal alone Core Network The operator deployed a Evolved Packet Core (EPC) Network encompassing both 3GPP and non-3GPP accesses service control is based on Common IMS The mobility scenario of interest is relevant to real time services (e.g., videostreaming) and therefore the interruption time should be minimised The RAN Study Item should identify potential solutions, their impact on specification and equipment implementation and propose viable solutions to minimise the delay Solutions developed for intra 3GPP mobility should be reused as much as possible

Scenario description: non-3GPP hotspot in a 3GPP access coverage In this scenario, nation wide coverage is provided by 3GPP networks Non-3GPP(e.g., mobile WiMAX) is deployed in hot spots (e.g., corporate buildings, campuses) for capacity reasons The operator deployed a Evolved Packet Core (EPC) Network encompassing both 3GPP and non-3GPP accesses EPC non-3GPP hotspot (e.g., mobile WiMAX) 3GPP RAT (HSPA and/or LTE)

Scenario #1: description Non-3GPP provides coverage in limited areas, requiring high bit rates and with high data traffic penetration The coverage of the city is provided by 3GPP PS to PS service continuity is the main scope Seamless service continuity is required for conversational and real time services (e.g. VoIP, videostreaming, videosharing) The user could move out of non-3GPP coverage and then be back

Scenario #1: handover direction In this scenario, the essential handover direction is from non-3GPP to 3GPP, due to coverage issues The mobility between non-3GPP and 3GPP shall be addressed When a user comes back into non-3GPP coverage, the mobility between 3GPP access and non-3GPP could be required This issue could be subject to more investigation during the Study Item phase, in order to evaluate the impact on the different radio technologies From the operator’s perspective it could be desirable to define also this scenario

Scenario #1: requirements and technical issues Idle mode mobility shall be supported in both directions In order to provide a seamless service continuity to the user, the interruption time shall be on the order of that defined within 3GPP access, i.e. session continuity is not enough. The RAN Study Item should identify potential solutions, their impact on specification and equipment implementation and propose viable solutions to minimise the delay The decisions regarding handover are taken by the network (with UE assistance) but not by the terminal alone The following aspects should be analysed in the Study Item Measurement configuration, detection and reporting of 3GPP cells during connection to non-3GPP radio access Role of UE, Radio access networks and EPC Signalling options between non-3GPP RAN, E-UTRAN and EPC Operations with single radio and dual radio UE (single radio preferred)

Scenario #2: non-3GPP hot spots in a discontinuous 3GPP coverage In this scenario, the operator deploys non-3GPP (e.g., mobile WiMAX) hot spots where no 3GPP (LTE and/or HSPA) macro coverage is available (e.g. indoor ) EPC 3GPP RAT (HSPA and/or LTE) Non-3GPP hot spot (e.g., mobile WiMAX)

Scenario #2: description Non-3GPP provides coverage in specific areas (e.g. private building), aiming at providing high bit rates and with high data traffic mainly in indoor and in the neighbourhood The coverage of the city is provided by 3GPP (e.g., HSPA) PS to PS service continuity is the main scope Seamless service continuity is required for conversational and real time services (e.g. VoIP, videostreaming, videosharing) The user could move out of non-3GPP coverage and then be back

Scenario #2: Handover direction In this scenario, both handover directions are possible When a user moves from outdoor to indoor, handover from 3GPP to non-3GPP shall be supported in order to ensure service continuity The mobility for both directions shall be addressed In the Study Item phase, to evaluate the impact on the different radio technologies

Scenario #2: requirements and technical issues Idle mode mobility shall be supported in both directions In order to provide a seamless service continuity to the user, the interruption time shall be on the order of that defined within 3GPP access, i.e. session continuity is not enough. The RAN Study Item should identify potential solutions, their impact on specification and equipment implementation and propose viable solutions to minimise the delay The decisions regarding handover are taken by the network (with UE assistance) but not by the terminal alone The following aspects should be analysed in the Study Item Measurement configuration, detection and reporting of 3GPP cells from non-3GPP radio access AND of non-3GPP cells from 3GPP radio access Role of UE, Radio access networks and EPC Signalling options between non-3GPP RAN, E-UTRAN and EPC Operations with single radio and dual radio UE (single radio preferred)