Abstract: A method of handling reachability of a mobile device in a wireless communication system is disclosed. The method comprises the mobile device establishing a packet data network (PDN) emergency connection when a first back-off timer received from a source core network node is running; the mobile device entering a first tracking area from a second tracking area, wherein the second tracking area is associated with the source core network node, and the first tracking area is associated with a target core network node and not in a tracking area list of the mobile device; and the mobile device sending a remaining time of the first back-off timer or a back-off indicator in a tracking area update (TAU) request message or a TAU complete message to the target core network node, wherein the back-off indicator indicates a back-off status of the mobile device.

Abstract: A method of handling non-access stratum (NAS) mobility management (MM) messages for a user equipment in a wireless communication system when the user equipment is configured for dual priority includes sending a first NAS MM request message containing a first priority level to a network in the wireless communication system, and storing a priority indicator indicating the first priority level in a non-volatile memory if the user equipment receives a NAS MM reject message with a mobility management back-off (MMBK) timer from the network.

Abstract: The present disclosure proposes a method and apparatuses of implementing MTC group trigger messages through a Cell Broadcasting Service (CBS). The method includes a MTC (Machine Type Communication) server transmitting to a MTC Inter-working Function (MTC-IWF) a trigger payload. The trigger payload would be delivered by the MTC-IWF to a group of MTC devices through Cell Broadcasting Center (CBC) and network nodes. The trigger payload may include a group trigger message indicator which distinguishes the group trigger message from a normal warning message. In response to receiving the content of the trigger payload, the network would page a group of MTC devices. From the group trigger message indicator embedded in the paging message, each MTC device would be able to receive a group trigger message through new system information block of the broadcast information.

Abstract: A method of transferring a short message service (SMS) to a communication device in a wireless communication system comprises a network of the wireless communication system not activating an idle-mode signaling reduction (ISR) mode for the communication device when the network applies only PS domain registration for the SMS for the communication device.

Abstract: MTC event monitoring methods and the network servers thereof. The MTC event monitoring method comprises configuring, by the network server, a detection sensitivity threshold, determining, by the network server, an MTC event at an MTC device and an associated detection sensitivity parameter, and reporting, by the network server, the MTC event to an MTC server only when the associated detection sensitivity parameter equals to or exceeds the detection sensitivity threshold.

Abstract: A method of subscription control for a first network control node in a mobile communication environment is disclosed. The method comprises receiving a trigger request message for triggering a mobile communication device from a machine-type communication (MTC) server, determining whether the trigger request message is valid according to whether one or more MTC features required by an application indicated in the trigger request message is subscribed or activated by the mobile communication device and is supported by a network control node of the mobile communication system, and accepting the trigger request message and forwarding the trigger request message to the network control node when the trigger request message is determined to be valid.

Abstract: A method of handing an emergency PDN connection when a back-off timer is running for a core network in a wireless communication system is disclosed. The method comprises starting a mobile reachable timer when a mobile device enters an idle mode, wherein the mobile reachable timer has a first timer value; accepting the emergency PDN connection; stopping the mobile reachable timer when the mobile device enters a connected mode to establish the emergency PDN connection; resetting the mobile reachable timer to a second timer value when a remaining time of the back-off timer is longer than a periodic area update timer; and restarting the mobile reachable timer according to the second timer value when the emergency PDN is disconnected.

Abstract: A method of handling an access network discovery and selection function (ANDSF) for a network of a wireless communication system is disclosed. The method comprises determining a first plurality of closed subscriber group (CSG) cells of the wireless communication system with a first CSG identity, for a mobile device of the wireless communication system to communicate with an evolved packet core (EPC) network of the wireless communication system via the first plurality of CSG cells, after the network determines the 3rd Generation Partnership Project (3GPP) as an access technology for the mobile device; and configuring an inter-system mobility policy (ISMP) node such that a value of an AccessTechnology leaf of a PrioritizedAccess node is configured as the 3GPP, and a value of a first AccessId leaf of the PrioritizedAccess node is configured as the first CSG identity of the first plurality of CSG cells.

Abstract: A method of handling signaling and data transmission for machine-type communication (MTC) for a network node in a mobile communication environment is disclosed. The method comprises receiving a non-access stratum (NAS) request message from a mobile communication device when the network control node is congested; and sending a trigger delivery failure report to a network gateway node in the core network to reject a trigger request message received from the network gateway node for triggering the mobile communication device.

Abstract: A method of handling reachability of a mobile device in a wireless communication system is disclosed. The method comprises the mobile device establishing a packet data network (PDN) emergency connection when a first back-off timer received from a source core network node is running; the mobile device entering a first tracking area from a second tracking area, wherein the second tracking area is associated with the source core network node, and the first tracking area is associated with a target core network node and not in a tracking area list of the mobile device; and the mobile device sending a remaining time of the first back-off timer or a back-off indicator in a tracking area update (TAU) request message or a TAU complete message to the target core network node, wherein the back-off indicator indicates a back-off status of the mobile device.

Abstract: A method of handing an emergency PDN connection when a back-off timer is running for a core network in a wireless communication system is disclosed. The method comprises starting a mobile reachable timer when a mobile device enters an idle mode, wherein the mobile reachable timer has a first timer value; accepting the emergency PDN connection; stopping the mobile reachable timer when the mobile device enters a connected mode to establish the emergency PDN connection; resetting the mobile reachable timer to a second timer value when a remaining time of the back-off timer is longer than a periodic area update timer; and restarting the mobile reachable timer according to the second timer value when the emergency PDN is disconnected.

Abstract: A method for handling Machine Type Communication (MTC) device triggering by a service network connected to an MTC server and at least one MTC device is provided. The method includes the steps of receiving a trigger request message from the MTC server, and transmitting a trigger indication comprising trigger information to the MTC device in response to the trigger request message.

Abstract: A mobile communication device with a wireless module and a controller module is provided. The wireless module performs wireless transceiving to and from a service network. The controller module transmits a request message for a Mobility Management (MM) procedure to the service network via the wireless module, and receives a rejection message with an MM back-off timer corresponding to the request message from the service network via the wireless module. Also, the controller module resets an attempt counter for the MM procedure in response to the rejection message with the MM back-off timer.

Abstract: A mobile communication device with a wireless module and a controller module is provided. The wireless module performs wireless transceiving to and from a first service network and a second service network. The controller module transmits a first request message for a Mobility Management (MM) procedure to the first service network, and receives a first rejection message with an MM back-off timer corresponding to the first request message from the first service network via the wireless module. Also, the controller module starts the MM back-off timer for the first service network in response to the first rejection message, and transmits a second request message for the MM procedure to the second service network via the wireless module.

Abstract: A timer configuration method for a core network in a wireless communication system is disclosed. The timer configuration method comprises receiving a mobility management request from a mobile device; and setting a mobile reachable timer to a value no less than a back-off timer value when the core network rejects the mobility management request with the back-off timer value.

Abstract: A method of handling quarries caused overload in a core network of a wireless communication is disclosed. The core network comprises a data base and a network control node which stores a mobility management (MM) context of a mobile device. The method comprises the network node sending information in a notification message to the data base, wherein the information comprises at least one of International Mobile Subscriber Identity (IMSI), UE Reachability Request Parameter for the MME/SGSN (URRP-MME/URRP-SGSN), and a session management (SM) and/or mobility management (MM) back-off timer or a back-off indicator.

Abstract: A method of initiating a service with an access point name (APN) of a wireless communication system for a mobile device in the wireless communication system is disclosed. The mobile device has a plurality of connections with the APN. The method comprises disconnecting at least one first connection of the plurality of connections from the APN, wherein the mobile device keeps at least one second connection of the plurality of connections connected; and initiating the service with the APN, after disconnecting the at least one first connection from the APN; wherein the APN is congested or overloaded.

Abstract: A method of handling signaling congestion for a machine type communication (MTC) device and/or a MTC server in a wireless communication system is disclosed. The method comprises receiving system information from a network; and stopping a triggering operation in a communication window according to the system information, wherein the system information indicates occurrence of a signaling congestion situation in the network.

Abstract: MTC event monitoring methods and the network servers thereof. The MTC event monitoring method comprises configuring, by the network server, a detection sensitivity threshold, determining, by the network server, an MTC event at an MTC device and an associated detection sensitivity parameter, and reporting, by the network server, the MTC event to an MTC server only when the associated detection sensitivity parameter equals to or exceeds the detection sensitivity threshold.