User device, radio communication system, and radio communication method
User equipment (UE) includes a mapping information holding unit that holds association information in which are associated with each other a type of an EPS bearer set in 4G and a type of a QoS flow set in 5G and that depends on a quality of service, a filter holding unit that holds a filter of a traffic flow associated with the EPS bearer set for the UE in the 4G, and a QoS rule generating unit that generates, based on EPS Bearer ID for recognizing the type of the EPS bearer and the filter held by the filter holding unit, 5G QoS Rule associated with the QoS flow.
1 . A user device comprising:
a memory that holds association information indicating an association between an Evolved Packet System (EPS) bearer that is set in a first radio communication system according to 4G and a Quality of Service (QoS) flow that is set in a second radio communication system according to 5G, the memory that holds a traffic flow template associated with the EPS bearer; and
a processor that performs handover from the first radio communication system to the second radio communication system,
wherein the processor derives, based on the association information and the traffic flow template, a quality-of-service rule of the QoS flow associated with the traffic flow template when performing the handover,
wherein the traffic flow template comprises one or more filter identifiers, precedence, and filter content, and
wherein, when a new QoS flow is mapped to an EPS bearer identifier already assigned to an existing QoS flow, the processor recognizes the bearer identifier contained in QoS flow ID description received during handover and links both QoS flows to that same bearer.
2 . A radio communication method implemented in a user device comprising:
holding association information indicating an association between an Evolved Packet System (EPS) bearer that is set in a first radio communication system according to 4G and a Quality of Service (QoS) flow that is set in a second radio communication system according to 5G;
holding a traffic flow template associated with the EPS bearer;
performing handover from the first radio communication system to the second radio communication system; and
deriving, based on the association information and the traffic flow template, a quality-of-service rule of the QoS flow associated with the traffic flow template when performing the handover,
wherein the traffic flow template comprises one or more filter identifiers, precedence, and filter content, and
wherein, when a new QoS flow is mapped to an EPS bearer identifier already assigned to an existing QoS flow, the user device recognizes the bearer identifier contained in QoS flow ID description received during handover and links both QoS flows to that same bearer.