A method includes determining whether a packet switched (PS) signaling connection is released, the PS signaling connection being associated with a first network corresponding to a first radio access technology (RAT), controlling a switching timing to a second network corresponding to a second RAT according to a type of the PS signaling connection, and transmitting a request for switching to the second network. A terminal includes a controller to determine whether a packet switched (PS) signaling connection is released, the PS signaling connection being associated with a first network corresponding to a first radio access technology (RAT), and to control a switching timing to a second network corresponding to a second RAT according to a type of the PS signaling connection, and a transmitter to transmit a request for switching to the second network.

There is provided a method for position determination of a wireless device. The method is performed by the wireless device. The method comprises detecting, whilst being operatively connected to a source radio access technology (RAT) an indicator requiring a handover of the wireless device to a target RAT. The method comprises starting a positioning detection procedure of the wireless device before being handed over to the target RAT, the positioning detection procedure involving processing of positioning measurements. The method comprises keeping the positioning measurements of the positioning detection procedure whilst the wireless device being handed over from the source RAT to the target RAT. The method comprises continuing the positioning detection procedure using the positioning measurements whilst being operatively connected to the target RAT.

An electronic device includes a communication circuitry, a processor electrically connected with the communication circuitry, a memory electrically connected with the processor. The memory stores instructions, when executed, causing the processor to connect the electronic device and a first network using the communication circuitry, determine a first user context among user contexts which are data associated with an operation state of the electronic device, and maintain a connection with the first network based on whether communication quality of the first network meets first communication quality corresponding to the determined first user context or switch from the first network to a second network different from the first network. Various other embodiments recognized from the specification are also possible.

A method of managing default QoS rules for PDU session is proposed. A PDU session defines the association between the UE and the data network that provides a PDU connectivity service. Each PDU session is identified by a PDU session ID, and may include multiple QoS flows and QoS rules. There can be more than one QoS rule associated with the same QoS flow. A default QoS rule is required to be sent to the UE for every PDU session establishment and it is associated with a QoS flow. Within a PDU session, there should be one and only one default QoS rule. In one novel aspect, UE behavior and error handling for proper QoS rule management is defined for PDU session establishment and modification procedures to enforce the one and only one default QoS rule policy.

A PDU session and QoS flow handling mechanism is proposed when a QoS flow of a PDU session does not have a mapping DRB after a handover or a service request procedure. If the QoS flow is associated with a default QoS rule, the UE can locally release the PDU session, initiate a PDU session release procedure, send a 5GSM status message with proper cause, or assume the PDU session is not reactivated. On the other hand, if the QoS flow is not associated with a default QoS rule, the UE can locally delete the QoS flow, delete the QoS flow by using a PDU session modification procedure, or send a 5GSM status message with proper cause.

A method of managing default QoS rules for PDU session is proposed. A PDU session defines the association between the UE and the data network that provides a PDU connectivity service. Each PDU session is identified by a PDU session ID, and may include multiple QoS flows and QoS rules. There can be more than one QoS rule associated with the same QoS flow. A default QoS rule is required to be sent to the UE for every PDU session establishment and it is associated with a QoS flow. Within a PDU session, there should be one and only one default QoS rule. In one novel aspect, UE behavior and error handling for proper QoS rule management is defined for PDU session establishment and modification procedures to enforce the one and only one default QoS rule policy.

Aspects of the disclosure can provide an apparatus and method for operating a Protocol Data Unit (PDU) session associated with a non-3GPP access when the apparatus is to perform an inter-system change. The apparatus can include processing circuitry that is configured to connect to a first communication system over a 3GPP access and a non-3GPP access and switch the connection from the first communication system to a second communication system. Further, when in a release mode, the processing circuitry can release a PDU session that is in the first communication system over the non-3GPP access, and when in a transfer mode, the processing circuitry can transfer the PDU session that is in the first communication system over the non-3GPP access to a Packet Data Network (PDN) connection that is in the second communication system over a 3GPP access.

A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a first cell of a first Public Land Mobile Network (PLMN) and a second cell of a second PLMN. The controller performs a Location Update (LU) procedure with the second cell via the wireless transceiver in response to an inter-PLMN handover of the UE from the first cell of the first PLMN to the second cell of the second PLMN, and obtains one or more Session Management (SM), Evolved SM (ESM), or 5GSM parameters of the second PLMN from a Protocol Data Unit (PDU) session modification command, a bearer modification command, or a Packet Data Protocol (PDP) context modification command which is received from the second cell via the wireless transceiver in response to completing the LU procedure caused by the inter-PLMN handover.

Aspects of the disclosure provide an electronic apparatus and a method for wireless communication. The electronic apparatus can include processing circuitry. The processing circuitry can send one or more packet data unit (PDU) session release requests to a wireless communication network system to request a PDU session release procedure. In an embodiment, a timer is used for the one or more PDU session release requests. The processing circuitry can determine whether a network response is received from the wireless communication network system before the timer expires and whether a number of times that the timer expires reaches a predetermined number of times. The processing circuitry can locally release the PDU session when the network response is not received and the number of times that the timer expires reaches the predefined number of times.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method for supporting handover and a corresponding base station and network node for performing the method is provided. The method includes forwarding data to a target base station, receiving a first end marker packet from a core network, and transmitting, for a quality of service, quality of service (QoS), flow for which the data forwarding has been completed, a second end marker packet to the target base station, the end marker packet containing a QoS flow identity (QFI). The methods of embodiments of the disclosure may reduce the packet transmission delay and improve the user experience.