# US 2019/0174377 A1 · End marker handling for mobility between 5g and lte > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174377 A1 - Document ID: US20190174377A1 - Status: Published application - Kind: A1 - Application number: 16/321,360 - Filed: 2016-08-08 - Published: 2019-06-06 - Earliest claimed: 2016-08-08 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Guillaume DECARREAU; Benoist SEBIRE - Web page: https://patentgrep.com/patent/US20190174377A1 ## CPC - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 36/023: {Buffering or recovering information during reselection} - H04W 36/28: involving a plurality of connections, e.g. multi-call or multi-bearer connections - H04W 76/11: Allocation or use of connection identifiers - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods and apparatus, including computer program products, are provided for mobility between networks. In some example embodiments, there may be provided a method. The method may include receiving, at a source base station, a single end marker indication for a flow associated with a user equipment being handed over to a target base station; determining, by the source base station and in response to the received single end marker indication, at least one bearer mapped to the flow; generating for each determined bearer, at least one end of marker indication; and sending, over a forwarding path from the source base station to the target base station, the generated at least one end of marker indication. Related systems, methods, and articles of manufacture are also described. ## Claims ### Claim at position 1 1-54. (canceled) ### Claim 55 A method comprising: receiving, at a source base station, a single end marker indication for a flow associated with a user equipment being handed over to a target base station; determining, by the source base station and in response to the received single end marker indication, at least one bearer mapped to the flow; generating for each determined bearer, at least one end of marker indication; and sending, over a forwarding path from the source base station to the target base station, the generated at least one end of marker indication. ### Claim 56 (depends on 55) The method of claim 55, wherein the single end marker indication represents a switch, at a core network, from a first path to the source base station to a second path to the target base station. ### Claim 57 (depends on 55) The method of claim 55, wherein the single end marker indication includes an identity of the flow. ### Claim 58 (depends on 55) The method of claim 55, wherein the single end marker indication is carried by a packet and/or a header. ### Claim 59 (depends on 58) The method of claim 58, wherein the header comprises a general packet radio service tunneling protocol header. ### Claim 60 (depends on 55) The method of claim 55, wherein the determining further comprises accessing a stored mapping of the flow to the at least one bearer. ### Claim 61 (depends on 55) The method of claim 55, wherein the at least one bearer comprises a radio bearer. ### Claim 62 An apparatus comprising: at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to at least: receive, at the apparatus, a single end marker indication for a flow associated with a user equipment being handed over to a target base station; determine, by the apparatus and in response to the received single end marker indication, at least one bearer mapped to the flow; generate for each determined bearer, at least one end of marker indication; and send, over a forwarding path from the apparatus to the target base station, the generated at least one end of marker indication. ### Claim 63 (depends on 62) The apparatus of claim 62, wherein the single end marker indication represents a switch, at a core network, from a first path to the apparatus to a second path to the target base station. ### Claim 64 (depends on 62) The apparatus of claim 62, wherein the single end marker indication includes an identity of the flow. ### Claim 65 (depends on 62) The apparatus of claim 62, wherein the single end marker indication is carried by a packet and/or a header. ### Claim 66 (depends on 65) The apparatus of claim 65, wherein the header comprises a general packet radio service tunneling protocol header. ### Claim 67 (depends on 62) The apparatus of claim 62, wherein the single end marker indication is received in response to a handover to the target base station. ### Claim 68 (depends on 62) The apparatus of claim 62, wherein the determination of at least one bearer further causes the apparatus to at least access a stored mapping of the flow to the at least one bearer. ### Claim 69 (depends on 62) The apparatus of claim 62, wherein the at least one bearer comprises a radio bearer. ### Claim 70 An apparatus comprising: at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to at least: receive, at the apparatus, an end marker indication for a bearer associated with a flow to a user equipment being handed over to the apparatus; determine, by the apparatus and in response to the received end marker indication for the bearer, whether the apparatus needs to wait for at least one additional end marker associated with another bearer associated with the same flow; and wait, based on the determination, for the at least one additional end marker in order to determine that the flow has been switched. ### Claim 71 (depends on 70) The apparatus of claim 70, wherein the end marker indication represents a switch, at a core network, from a first path to source base station to second path to the apparatus, the core network handling quality of service on a bearer basis. ### Claim 72 (depends on 70) The apparatus of claim 70, wherein the end marker indication includes an identity of the flow. ### Claim 73 (depends on 70) The apparatus of claim 70, wherein the end marker indication is carried by a packet and/or a header. ### Claim 74 (depends on 70) The apparatus of claim 70, wherein the header comprises a general packet radio service tunneling protocol header.