TWI488534B - Method of performing attach procedures - Google Patents

Description

Method of registering procedures

The present invention relates to a method of performing a registration procedure, and more particularly to a method of selecting one or more public land mobile networks and registering the program with one or more radio access technologies.

The 3rd Generation Partnership Project (3GPP) developed a wireless communication system using Wideband Code Division Multiple Access (WCDMA) technology to provide high spectrum utilization efficiency and no distance. Coverage and high-quality, high-speed multimedia data transmission can meet various quality of service (QoS) requirements, provide flexible and diversified two-way transmission services, and provide better communication quality. , effectively reduce the communication interruption rate.

Commonly used wireless access technologies include the Global System for Mobile communications (GSM) system, the Global Mobile Communications/Enhanced Data Rate Global Mobile Telecommunications (GSM/EDEG Radio Access Network (GERAN) system, Code Division Multiple Access (CDMA) system, Universal Mobile Telecommunications System (UMTS) system, Long Term Evolution (LTE) system, and Evolved Universal Terrestrial Global Radio Access Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system.

Taking the UMTS system as an example, the third generation mobile communication system includes three parts: user equipment (UE), UMTS Terrestrial Radio Access Network (UTRAN) and core network (Core Network, CN). . The user device is composed of a mobile device (ME) and a UMTS Subscriber Identity Module (USIM), or a mobile client device and a subscriber identity module (Subscriber Identity Module, Composed of SIM). The user device performs signal connection with the base station (Node-B) of the wireless communication access network, and further exchanges information with the wireless network controller (RNC) of the wireless communication access network. Depending on the type of traffic being processed, the core network can communicate with the public switched telephone network (PS switched) via the circuit switched domain (CS domain) or the packet switched domain (PS Domain) of the core network. Telephone network (PSTN), integrated services digital network (ISDN) or Internet (Internet) telecommunications service network interface for a variety of voice and data transmission services. The CS field evolves from the GSM network, the communication unit (cell) is divided into a location area (LA), which is responsible for processing voice services to provide CS services; the PS field is evolved from the General Packet Radio Service (General Packet Radio Service, GPRS) network, the communication unit is divided into a routing area (RA), which is responsible for processing data traffic to provide PS services.

In the prior art, when the user device roams to a public land mobile network (PLMN), if the first radio access technology (RAT) has the best signal quality, then The attach procedure is performed with the first wireless access technology to use the PS service. However, the public land mobile network may only provide the PS service through the second wireless access technology, so a rejection message is sent to the user device, and the user device directly determines that the USIM or SIM cannot support the PS. service. In the prior art, even if the public land mobile network can provide the PS service through the second wireless access technology with poor signal quality, the first wireless access technology refuses to register the message, which makes the user unable to use the PS service.

The present invention provides a method of performing a registration procedure, comprising: a user device selecting a first public land mobile network and performing a first registration procedure with a first radio access technology; receiving the first public land mobile When the network sends one of the first rejection registration messages for the first registration procedure, and determines that the first rejection registration message is related to a first rejection reason, the user device selects the first public land mobile network and The second radio access technology performs a second registration procedure; after receiving the first public land mobile network, sending a second reject registration message for the second registration procedure, and determining that the second reject registration message is related to The second device rejects the reason, the user device selects a second public land mobile network and performs the registration procedure with a third wireless access technology; and receives the second public land mobile network for the third registration The program sends one of the third reject registration messages, and determines that the third reject registration message is related to a third rejection reason, the user device determines that the Aid packet-switched services.

The present invention provides a method of performing a registration procedure that provides a retry mechanism to increase the success rate of providing a PS service when the user device receives a registration rejection message from the public land mobile network.

Figure 1 is a method of performing a registration procedure in the present invention, which includes the following steps:

Step 110: Select a public land mobile network and a wireless access technology.

Step 120: The user equipment performs a corresponding registration procedure on the selected public land mobile network by using the selected radio access technology, and determines whether an allowed registration message is received: if yes, step 160 is performed; if not, steps are performed. 130.

Step 130: The user device receives one of the selected public land mobile network transmissions to reject the registration message, and determines whether it is related to a specific rejection reason: if yes, step 140 is performed; if not, step 170 is performed.

Step 140: Select another radio access technology that has not been registered and determine whether the reselection can be successfully performed: if yes, go to step 120; if no, go to step 150.

Step 150: Select another public land mobile network that has not been registered and determine whether it can successfully reselect: if yes, go to step 120; if no, go to step 180.

Step 160: The user device is connected to the selected public land mobile network with the selected wireless access technology.

Step 170: The user device performs the corresponding steps according to the 3GPP specifications.

Step 180: The user device determines that its SIM/USIM cannot support the PS service.

In step 110, when the user device roams with USIM/SIM issued by a particular carrier, a public land mobile network and a wireless access technology may be selected to require the use of the PS service. For example, if the first radio access technology has the best signal quality when the first public land mobile network is selected, the first radio access technology performs a registration procedure to use the PS service. The first public land mobile network may support the provision of the PS service through the first wireless access technology, or may only support the provision of the PS service through a second wireless access technology.

In step 120, if the selected public land mobile network can provide the PS service through the selected wireless access technology, the user device receives an allow registration message, and then in step 160 the selected wireless memory The technology is linked to the selected public land mobile network, for example, to the first public land mobile network by using the first wireless access technology; if the selected public land mobile network cannot be accessed through the selected wireless access technology The PS service is provided, and the user device performs step 130 at this time.

In step 130, when the selected public land mobile network is unable to provide the PS service through the selected radio access technology, the user device receives a reject registration message. If the refusal of the registration message is related to the specific rejection reason, then the user device performs step 140. If the refusal of the registration message is not related to the specific refusal reason, then the user device performs step 170.

In step 140, the user device selects another wireless access technology that has not been registered and determines whether the reselection can be successful. If the selected public land mobile network only supports a single wireless access technology, or the user device has tried all the wireless access technologies supported by the selected public land mobile network to register the program, then the user The device will determine that the radio access technology reselection failed and then proceeds to step 150. If the user device can select another wireless access technology to perform the registration process, step 120 is performed again. In other words, the present invention provides a radio access technology retry mechanism consisting of the loop of step 140 - step 120 - step 130.

In step 150, the user device selects another public land mobile network that has not been registered and determines whether the reselection can be successful. If the user device roaming area has only a single public land mobile network, or the user device has tried all public land mobile networks nearby to perform the registration process, then the user device will determine that the public land mobile network is heavy. The selection fails and then step 180 is performed. If the user device can select another public land mobile network to perform the registration process, step 120 is performed again. In other words, the present invention provides a public land mobile network retry mechanism consisting of the loop of step 150 - step 120 - step 130 - step 140.

In step 160, the user device will connect to the selected public land mobile network with the selected wireless access technology. The selected radio access technology may be a step 120 of the pre-selected radio access technology that allows registration, or a reselection radio access technology that allows registration after performing a radio access technology retry mechanism. The selected public land mobile network may be a step 120 to allow registration of the public land mobile network, or a public land mobile network that allows registration after the public land mobile network retry mechanism is implemented.

In the embodiment of the present invention, the selected public land mobile network may be a wireless network system such as GSM, GERAN, CDMA, UMTS or LTE provided by different vendors. The selected wireless access technology can be 2G, 2.5G, 3G, 4G or 5G technologies. The selected public land mobile network can provide PS services through one or more wireless access technologies. However, the above embodiments do not limit the scope of the invention.

In step 120 of the embodiment of the present invention, the user equipment may perform a registration procedure according to relevant steps defined in the 3GPP specifications, such as registering an International Mobile Subscriber Identity (IMSI) to separately request a GPRS service or a simultaneous request. GPRS services and non-GPRS services, or registered evolved packet core (EPC) to separately request evolved packet system (EPS) services or both EPS services and non-EPS services. In the LTE system, the registration procedure may be a tracking area update (TAU); in the GERAN and UTRAN systems, the registration procedure may be a routing area update (TAU). However, the above embodiments do not limit the scope of the invention.

In step 130 of the embodiment of the present invention, the specific rejection reason may be the rejection reason defined in the 3GPP specification, for example, the rejection reason 7 defined in the 3GPP TS 24.008 specification: GPRS service not allowed (#7 GPRS services not allowed) or the reason for rejection 8: GPRS services and non-GPRS services not allowed (#8 GPRS services and non-GPRS services not allowed), or rejection reasons as defined in 3GPP TS 24.301 specification 7: EPS services are not allowed (#7 EPS services not allowed) or Reason for rejection 8: EPS services and non-EPS services not allowed (#8 EPS services and non-EPS services not allowed). However, the above embodiments do not limit the scope of the invention.

In step 130 of the embodiment of the present invention, the rejection of the registration message received by the user device may be related to other rejection reasons, such as the rejection reason 3 defined in the 3GPP TS 24.008 specification: illegal action base (#3 illegal MS), rejection Reason 4: Illegal mobile device (#4 illegal ME), rejection reason 11: Public land mobile network not allowed (#11 PLMN not allowed), rejection reason 12: Location area not allowed (#12 location area not allowed), rejection Reason 13: roaming not allowed in this location area, reason 14: GPRS service not allowed in this PLMN, Reason 15: No suitable communication unit in this location area (#15 no suitable cells in this location area), or rejection reason 25: Not authorized to this closed user group (#25 not authorized for this CSG), etc., or Rejection reason 3 as defined in 3GPP TS 24.301 specification: illegal user device (#3 illegal UE), rejection reason 4: illegal mobile device (#4 illegal ME), rejection reason 11: not allowed Public land mobile network (#11 PLMN not allowed), rejection reason 12: not allowed tracking area (#12 tracking area not allowed), rejection reason 13: roaming in this tracking area is not allowed (#13 roaming not allowed in this Tracking area), reason 14: The public land mobile network does not allow EPS service (#14 EPS services not allowed in this PLMN), rejection reason 15: there is no suitable communication unit in this tracking area (#15 no suitable cells in This tracking area), or rejection reason 25: is not authorized to this closed user group (#25 not authorized for this CSG). Therefore, the present invention performs the relevant steps defined in the 3GPP specification according to each reason for rejection in step 170, and the details thereof are described in detail in the related 3GPP specifications, and are not further described herein.

In step 180, when neither the radio access technology reselection nor the public land mobile network reselection can receive the permission registration message, the user device determines that its SIM/USIM cannot support the PS service.

In the present invention, when the user device receives a registration reject message from a particular public land mobile network, the present invention attempts to perform the registration procedure with other wireless access technologies. If all RATs are not successfully registered, the present invention will select other public land mobile networks and attempt to register with one or more RATs. When the above registration retry fails, the user device determines that the SIM/USIM cannot support the PS service. Therefore, the registration procedure of the present invention can increase the success rate of providing PS services.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

110~180. . . step

Figure 1 is a diagram of a method of performing a registration procedure in the present invention.

110~180. . . step

Claims (8)

A method for performing an attach procedure, comprising: a user device selecting a first public land mobile network (PLMN) and using a first radio access technology (Radio Access Technology, RAT) Performing a first registration procedure; receiving, by the first public land mobile network, one of the first rejection registration messages for the first registration procedure, and determining that the first rejection registration message is related to a first rejection reason Receiving, by the user device, the first public land mobile network and performing a second registration procedure by using a second wireless access technology; receiving the first public land mobile network for transmitting the second registration procedure When the second rejection registration message is determined, and the second rejection registration message is determined to be related to a second rejection reason, the user device selects a second public land mobile network and performs the registration procedure by using a third wireless access technology; And receiving, by the second public land mobile network, one of the third rejection registration messages for the third registration procedure, and determining the third rejection registration message When associated with a third reason for rejection, the user apparatus determines not support packet-switched (packet switched, PS) service. The method of claim 1, further comprising: when receiving the first permission registration message sent by the first public land mobile network for the first registration procedure, the user device uses the first wireless memory The technology is coupled to the first public land mobile network; and when the first public land mobile network receives the second allowed registration message for the second registration procedure, the user device uses the second wireless memory The technology is coupled to the first public land mobile network; and upon receiving the third public land mobile network transmitting a third allowed registration message for the third registration procedure, the user device uses the third wireless The access technology is linked to the second public land mobile network. The method of claim 1, wherein the first to third rejection reasons are as defined in the 3rd Generation Partnership Project (3GPP) specification: rejection reason 7: universal packet wireless service is not allowed ( #7 GPRS services not allowed); or reject reason 8: Do not allow universal packet wireless service and non-GPRS services not allowed. The method of claim 1, wherein the first to third rejection reasons are as defined in the third generation mobile communication alliance specification: rejection reason 7: no evolution packet system service is allowed (#7 EPS services not allowed); or Rejection Reason 8: Evolved Packet System Service and Non-EPS Services Not Allowed (#8 EPS services and non-EPS services not allowed). The method of claim 1, wherein the first to third registration procedures include: registering an International Mobile Subscriber Identity (IMSI) to separately request a general packet wireless service or simultaneously request a universal packet wireless service and a non- A general packet radio service; or an evolved packet core (EPC) to separately evolve the packet system service or both the evolved packet system service and the non-evolved packet system service. The method of claim 1, wherein the first to third registration procedures comprise a tracking area update (TAU) program or a routing area update (RAU) program. The method of claim 1, wherein: upon receiving the third rejection registration message and determining that the third rejection registration message is related to the third rejection reason, the user device determines a subscriber identity card (Subscriber The Identity Switch (SIM) or a Universal Subscriber Identity Module (USIM) cannot support the packet exchange service. The method of claim 1, wherein the first to third public land mobile networks comprise a Global System for Mobile communications (GSM) system, a global mobile communication/enhanced data rate global mobile communication wireless connection GSM/EDEG Radio Access Network (GERAN) system, a Code Division Multiple Access (CDMA) system, a Universal Mobile Telecommunications System (UMTS) system, and a long-term evolution (Long Term Evolution, LTE) system, or an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system.