Method and user equipment for wireless communication

Abstract

One aspect of the present invention may provide a method for wireless communication, comprising: (a) registering a user equipment with a public land mobile network or an independent non-public network, wherein the user equipment is registered with the same public land mobile network or independent non-public network via a first access type and a second access type; (b) determining that a condition triggering re-registration is satisfied; (c) performing a first deregistration via the first access type and a second deregistration via the second access type; and (d) after the first deregistration and the second deregistration in (c) are completed, performing a first registration via the first access type or performing a second registration via the second access type, or performing a first registration via the first access type and performing a second registration via the second access type. By utilizing the present invention, wireless communication can be better performed.

Description

Technical Field

[0001] The present invention relates to a wireless communication system, and more particularly to a wireless communication system for a UE via a 3GPP (3 rd The fifth generation (5G) network of the same public land mobile network (PLMN) or standalone non-public network (SNPN) is deregistered and registered with the same public land mobile network (PLMN) or standalone non-public network (SNPN). th Generation, 5G) Globally Unique Temporary Identifier (GUTI) (5G-GUTI) deletion time (deletiontime) is used for processing. Background Art

[0002] Wireless communication networks have grown exponentially over the years. Long-Term Evolution (LTE) systems can provide high peak data rates, low latency, higher system capacity, and low operating costs due to a simplified network architecture. LTE systems (also known as 4G systems) also provide seamless integration with legacy wireless networks, such as the Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS). In LTE systems, the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) includes multiple evolved Node-Bs (eNodeBs or eNBs) that communicate with multiple mobile stations (called User Equipment (UE)). 3GPP networks typically include a mix of 2G / 3G / 4G systems. The Next Generation Mobile Network (NGMN) Committee has decided to focus future NGMN activities on defining the end-to-end requirements for the 5G New Radio (NR) system (5G System, 5GS). The base stations in the 5G NR system can be referred to as the next generation Node-B (gNodeB or gNB).

[0003] The Non-Access Stratum (NAS) is used to convey non-access stratum signaling between the UE and the Mobility Management Entity (MME) or Access and Mobility Management Function (AMF) for LTE / NR access. The NAS signaling connection can be established through the Attach process in 4G / LTE or through the Registration process in 5G / NR, including UE subscription and identity. The temporary user identity for 5GS-based services, namely 5G-GUTI, can be used to identify registered UEs. When the UE registers to different PLMNs or SNPNs through 3GPP access and non-3GPP access, the UE maintains two 5G-GUTIs, one of which is used to register to the PLMN or SNPN through 3GPP access, and the other 5G-GUTI is used to register to another PLMN or SNPN through non-3GPP access. When a UE is registered to the same PLMN or SNPN via 3GPP access and non-3GPP access, the UE and the AMF maintain a 5G-GUTI that is common to both 3GPP access and non-3GPP access.

[0004] When the UE needs to delete the 5G-GUTI according to the NAS procedure, it deletes the 5G-GUTI only when it can determine that the 5G-GUTI will not be used in any future procedure. When the UE needs to re-register with the network, the UE follows the following procedure: deregister via both accesses, delete the shared 5G-GUTI, and re-register via both accesses. The UE needs to perform these procedures in the appropriate order to ensure that: 1) the UE does not run out of available 5G-GUTIs, and 2) the UE does not use multiple 5G-GUTIs for the same network in different procedures.

[0005] A solution needs to be found. Summary of the Invention

[0006] A method for handling 5G-GUTI deletion time for UE deregistration and registration to the same PLMN or SNPN on 3GPP access and non-3GPP access may be provided. When the UE is registered to the same PLMN or SNPN through 3GPP access and non-3GPP access, the UE and the AMF may maintain the 5G-GUTI shared by the 3GPP access and non-3GPP access. When the UE needs to re-register to the network, the UE may follow the following process: deregister both accesses, delete the shared 5G-GUTI, and re-register through both accesses. The UE may perform the above processes in the appropriate order. In one novel aspect, after deregistration is completed through 3GPP access and non-3GPP access, the UE may trigger re-registration (through 3GPP access or non-3GPP access). In addition, after deregistration is completed through 3GPP access and non-3GPP access, the UE may delete the shared 5G-GUTI.

[0007] A method for wireless communication, comprising: (a) registering a user equipment with a public land mobile network or a standalone non-public network, wherein the user equipment is registered with the same public land mobile network or standalone non-public network via a first access type and a second access type; (b) determining that a condition triggering re-registration is satisfied; (c) performing a first deregistration via the first access type and a second deregistration via the second access type; and (d) after the first deregistration and the second deregistration in (c) are completed, performing a first registration via the first access type or performing a second registration via the second access type, or performing a first registration via the first access type and a second registration via the second access type.

[0008] A user equipment for wireless communication comprises: a registration processing circuit, which registers with a public land mobile network or an independent non-public network, wherein the user equipment is registered with the same public land mobile network or independent non-public network through a first access type and a second access type; a control circuit, which determines that a condition triggering re-registration is satisfied; and a deregistration processing circuit, which performs a first deregistration through the first access type and a second deregistration through the second access type, wherein after the first deregistration and the second deregistration are completed, the first registration is performed through the first access type or the second registration is performed through the second access type, or the first registration is performed through the first access type and the second registration is performed through the second access type.

[0009] A method for wireless communication, comprising: (a) registering a user equipment with a public land mobile network or a standalone non-public network, wherein the user equipment is registered with the same public land mobile network or standalone non-public network through a first access type and a second access type; (b) determining that a condition triggering re-registration is satisfied; (c) performing a first deregistration through the first access type and a second deregistration through the second access type; (d) after the first deregistration and the second deregistration in (c) are completed, deleting a common global unique temporary identifier; and (e) after deleting the common global unique temporary identifier in (d), performing a first registration through the first access type or performing a second registration through the second access type, or performing a first registration through the first access type and a second registration through the second access type.

[0010] By utilizing the present invention, wireless communication can be better performed.

[0011] Other embodiments and advantages will be described in the detailed description below. This summary is not intended to define the invention. The invention is defined by the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings may illustrate embodiments of the present invention, wherein like numerals may represent like components.

[0013] Figure 1 A UE and a 5G network according to one novel aspect may be illustrated handling 5G-GUTI deletion, deregistration, and re-registration to the same PLMN / SNPN on 3GPP access and non-3GPP access types.

[0014] Figure 2 is a simplified block diagram of a UE and network entities according to various embodiments of the present invention.

[0015] Figure 3 An exemplary timing for a UE to perform deregistration and delete a common 5G-GUTI on different access types may be illustrated.

[0016] Figure 4 An embodiment may be illustrated for performing a proper sequence of 5G-GUTI deletion, UE registration, and deregistration on 3GPP access and non-3GPP access according to one novel aspect.

[0017] Figure 5 A timing diagram of re-registration to the same PLMN / SNPN on 3GPP access and non-3GPP access types between a UE and a 5GS according to one novel aspect may be illustrated.

[0018] Figure 6is a flow chart of a first method of re-registering to the same PLMN / SNPN on 3GPP access and non-3GPP access types according to one novel aspect of the present invention.

[0019] Figure 7 is a flow chart of a second method of re-registering to the same PLMN / SNPN on 3GPP access and non-3GPP access types according to one novel aspect of the present invention. DETAILED DESCRIPTION

[0020] Reference will now be made in detail to some embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0021] Figure 1 A UE and a 5G network 100 according to one novel aspect may be illustrated to handle 5G-GUTI deletion, deregistration, and reregistration to the same PLMN / SNPN on both 3GPP and non-3GPP access types. In a 3GPP network, multiple base stations (e.g., gNBs) may communicate with multiple mobile stations (referred to as UEs). The 5G NR network 100 may include a UE 101, a 3GPP access 102 (e.g., a 3GPP Radio Access Network (RAN)), a non-3GPP access 103 (e.g., a non-3GPP RAN), an AMF 110, a Session Management Function (SMF) 111, a Non-3GPP Interworking Function (N3IWF) 112, a User Plane Function (UPF) 113, and a data network 120. The AMF 110 can communicate with the base station, SMF 111, and UPF 113 in the 3GPP access 102 to perform access and mobility management for wireless access devices in the 5G network 100. The SMF 111 can be primarily responsible for interacting with the decoupled data plane, creating, updating, and removing protocol data unit (PDU) sessions, and managing session context with the UPF 113. The N3IWF 112 can interface with the 5G Core (5GC) control plane functions.

[0022] In the access stratum (AS), the RAN can provide radio access for the UE 101 through the radio access technology (RAT). In the non-access stratum (NAS), the AMF 110 and the SMF 111 can communicate with the RAN and the 5GC to perform access and mobility management and PDU session management for wireless access devices in the 5G network 100. The 3GPP access 102 may include a base station (gNB or eNB), which can provide radio access for the UE 101 through various 3GPP RATs (including NR, EUTRA, or 3G / 2G). The non-3GPP access 103 may include an access point (AP) that provides radio access for the UE 101 via a non-3GPP RAT (including WiFi). The UE 101 can access the data network 120 through the 3GPP access 102, the AMF 110, the SMF 111, and the UPF 113. UE 101 can access data network 120 through non-3GPP access 103, N3IWF 112, AMF 110, SMF 111, and UPF 113. UE 101 can be equipped with a single radio frequency (RF) module or transceiver or multiple RF modules or transceivers for services via different RAT / core networks. In some examples, UE 101 can be a smartphone, a wearable device, an Internet of Things (IoT) device, a tablet, etc.

[0023] The NAS layer can be used to convey non-radio (NAS) signaling between the UE and the AMF for NR access or non-3GPP access. The NAS signaling connection can be established through the registration process in 5G / NR, including UE subscription and identity. The temporary user identity for 5GS-based services, i.e., 5G-GUTI, can be used to identify the registered UE. When the UE is registered to different PLMNs or SNPNs through 3GPP access and non-3GPP access, the UE can maintain two 5G-GUTIs, one of which can be used to register to the PLMN or SNPN through 3GPP access, and the other 5G-GUTI can be used to register to another PLMN or SNPN through non-3GPP access. When the UE is registered to the same PLMN or SNPN through 3GPP access and non-3GPP access, the UE and the AMF can maintain one 5G-GUTI, which can be common for 3GPP access and non-3GPP access. When the UE needs to delete the 5G-GUTI according to the NAS process, the UE can delete the 5G-GUTI only when the UE can determine that the 5G-GUTI is no longer used in any subsequent process.

[0024] exist Figure 1 In the example shown in FIG1 , UE 101 may register to the same PLMN / SNPN via both 3GPP and non-3GPP access (step 131). The UE may then detect a trigger condition for re-registering with the network (step 132). For example, UE 101 receives a downlink (DL) NAS transport message with the payload container type information element (IE) set to "UE parameters update transparent container" and the payload container IE successfully passes an integrity check. The UE parameter update list may include a UE parameter update data set, wherein the UE parameter update data set type indicates "Routing indicator update data", the UE receives a REFRESH command from the Universal Integrated Circuit Card (UICC), and the re-registration value (REG) bit (REG bit) of the UE parameter update header in the UE parameter update transparent container IE is set to "re-registration requested". At this point, the UE has registered in the same PLMN through both 3GPP access and non-3GPP access. The UE can now deregister from the 5GS, delete the shared 5G-GUTI, and register back to the 5GS.

[0025] Note that UE 101 has a 5G-GUTI, which may be common for the same PLMN or SNPN (because the UE is registered to the same PLMN or SNPN via 3GPP access and non-3GPP access). When the UE needs to re-register with the network, the UE may follow the following process: deregister from both accesses, delete the common 5G-GUTI, and re-register via both accesses (step 133). The UE may perform the above processes in the appropriate order to ensure that: 1) the UE is not left without a 5G-GUTI in any future process that requires the original 5G-GUTI, and 2) the UE does not use multiple 5G-GUTIs for the same network in different processes. In one novel aspect, after completing deregistration via 3GPP access and non-3GPP access, UE 101 may trigger re-registration (either via 3GPP access or non-3GPP access). Additionally, after completing deregistration via 3GPP access and non-3GPP access, UE 101 may delete the common 5G-GUTI.

[0026] Figure 2 2 is a simplified block diagram of wireless devices 201 and 211 according to an embodiment of the present invention. For wireless device 201 (e.g., a network entity AMF), antennas 207 and 208 can transmit and receive radio signals. RF transceiver module 206 can be coupled to the antennas, receive RF signals from the antennas, convert the RF signals to baseband signals, and transmit them to processor 203. RF transceiver module 206 can also convert baseband signals received from the processor, convert the baseband signals to RF signals, and transmit them to antennas 207 and 208. Processor 203 can process the received baseband signals and invoke various functional modules and circuits to execute features within wireless device 201. Storage medium 202 can store program instructions and data 210 to control the operation of device 201.

[0027] Similarly, for wireless device 211 (e.g., UE), antennas 217 and 218 can transmit and receive RF signals. RF transceiver module 216 can be coupled to the antennas, receive RF signals from the antennas, convert the RF signals into baseband signals, and transmit them to processor 213. RF transceiver module 216 can also convert baseband signals received from the processor, convert the baseband signals into RF signals, and transmit them to antennas 217 and 218. Processor 213 can process the received baseband signals and invoke various functional modules and circuits to implement features in UE 211. Storage medium 212 can store program instructions and data 220 to control the operation of UE 211. Storage medium 212 can also store a Universal Subscriber Identity Module (USIM) card 225 to control the operation of UE 211.

[0028] Wireless devices 201 and 211 may also include some functional modules and circuits, which may be implemented and configured to perform the embodiments of the present invention. Figure 2 In the example of FIG, wireless device 201 may be an AMF, which may include a NAS signaling connection processing module 205, a paging module 204, a mobility management module 209, and a control and configuration circuit 221. Wireless device 211 may be a UE, which may include a connection processing module 215, a registration module 214 (for registration processing), a paging and mobility processing module 219, and a control and configuration circuit 231. Note that a wireless device may be both a transmitting device and a receiving device. Different functional modules and circuits may be implemented and configured using software, firmware, hardware, or any combination thereof. When executed by processors 203 and 213 (e.g., by executing program instructions (or program codes) 210 and 220), the functional modules and circuits described above may enable AMF 201 and UE 211 to implement embodiments of the present invention.

[0029] In one example, the UE 211 may perform registration and deregistration with the network via the registration (and deregistration) module 214, establish a signaling connection via the connection handling module 215, monitor paging via the paging and mobility handling module 219, and obtain configuration information via the control and configuration circuitry 231. In one example, when the UE needs to re-register with the same network, the UE may follow the following process: deregister on both accesses, delete the shared 5G-GUTI, and re-register on both accesses. In one novel aspect, after completing deregistration via both 3GPP access and non-3GPP access, the UE may trigger re-registration (either via 3GPP access or non-3GPP access). Additionally, after completing deregistration via both 3GPP access and non-3GPP access, the UE may delete the shared 5G-GUTI.

[0030] Figure 3 An exemplary timing for a UE to perform deregistration and delete a common 5G-GUTI on different access types may be illustrated. Figure 3 In some scenarios, a UE may be registered to the same PLMN or SNPN through 3GPP (e.g., Access 1) and non-3GPP (e.g., Access 2), and the UE may have a common 5G-GUTI (e.g., 5G-GUTI1) that is common to the same PLMN or SNPN. The UE then needs to re-register with the network. For example, the UE receives a DL NAS transport message, where the payload container type IE is set to "UE parameters update transparent container" and the payload container IE successfully passes the integrity check. The UE parameter update list may include a UE parameter update data set, where the UE parameter update data set type indicates "Routing indicator update data", the UE receives a refresh command from the UICC, and the REG bit of the UE parameter update header in the UE parameter update transparent container IE is set to "re-registration requested".

[0031] The UE may perform the following processes: (1) UE deregisters from / through 3GPP access; (2) UE deregisters from / through non-3GPP access; (3) UE deletes 5G-GUTI; (4) UE registers through 3GPP access; (5) UE registers through non-3GPP access. If the above processes are not performed in a certain order, such processing may cause problems. In the first example, if the 5G-GUTI is deleted when the first deregistration is completed / started but the second deregistration is not completed / started, it will result in no 5G-GUTI available for the second deregistration. In the second example, if one of the deregistrations takes a long time, for example, the protection timer for the deregistration request expires in an abnormal situation. This will result in the same UE using different 5G-GUTIs in different processes in the same network, which will cause the network to need to support multiple UE contexts.

[0032] like Figure 3As shown in 310, a UE may use a first 5G-GUTI1 after registering with both a 3GPP access (e.g., access 1) and a non-3GPP access (e.g., access 2). Deregistration of the non-3GPP access may be completed before deregistration of the 3GPP access. In the first example, if the UE deletes 5G-GUTI1 at time T0 after completing deregistration from the non-3GPP access, the UE has no available 5G-GUTI during the deregistration process of the 3GPP access. In the second example, if the UE does not delete the 5G-GUTI at time T0, obtains a second 5G-GUTI2 at time T1 after registering with the non-3GPP access, and the UE continues to use 5G-GUTI1 before completing deregistration of the 3GPP access at time T2, this may result in the UE using 5G-GUTI1 and 5G-GUTI2 in different processes in the same network from time T1 to T2.

[0033] In one novel aspect, the above procedures may be performed by the UE in the appropriate order. If the UE is registered via 3GPP access, then before deleting the 5G-GUTI, the UE may wait for emergency services (if any) on the 3GPP access to complete, enter idle or inactive mode, perform the deregistration procedure, and then if the UE is also registered to the same PLMN or SNPN via non-3GPP access, wait for the deregistration procedure on the non-3GPP access to complete. The UE may then initiate the registration procedure for the initial registration. Figure 3 As shown in FIG320 , the UE may complete deregistration from the 3GPP access at time T3. Since the UE has not yet completed deregistration from the non-3GPP access, the UE may wait until time T4 and then delete the shared 5G-GUTI. After deleting the shared 5G-GUTI, the UE may begin a re-registration process via the 3GPP access or the non-3GPP access. That is, after deregistration from the non-3GPP access is complete, the UE may re-register with the 3GPP access.

[0034] Similarly, if the UE is registered via a non-3GPP access, then before deleting the 5G-GUTI, the UE may wait for emergency services to complete, enter idle mode on the non-3GPP access, perform the deregistration procedure, and then wait for the deregistration procedure on the 3GPP access to complete if the UE is also registered to the same PLMN or SNPN via a 3GPP access. The registration procedure for the initial registration may then be initiated on the non-3GPP access, i.e., the UE may re-register to the non-3GPP access after the deregistration on the 3GPP access is complete.

[0035] Figure 4An embodiment of the appropriate order for performing 5G-GUTI deletion, UE registration, and deregistration on 3GPP access and non-3GPP access according to one novel aspect may be illustrated. After a UE registers to the same PLMN / SNPN through 3GPP access and non-3GPP access and shares a common 5G-GUTI, in some scenarios, the UE may need to re-register to both accesses of the network. The UE may then perform the following processes: (1) UE deregisters from / through 3GPP access; (2) UE deregisters from / through non-3GPP access; (3) UE deletes the shared 5G-GUTI; (4) UE registers on 3GPP access; (5) UE registers on non-3GPP access. According to one novel aspect, the UE may perform step (3) after completing steps (1) and (2), for example, the shared 5G-GUTI may be deleted after the UE has completed deregistration from both 3GPP access and non-3GPP access. In addition, after both step (1) and step (2) are completed, the UE may perform step (4) or step (5). For example, after the UE completes deregistration from 3GPP access and non-3GPP access, the UE may re-register through 3GPP access or non-3GPP access, or through both. In other words, after performing steps (1) and (2), and after deleting the shared 5G-GUTI in step (3), the UE may re-register through 3GPP access or non-3GPP access.

[0036] Figure 4Some possible scenarios of the above processes (1) to (5) can be described in an appropriate order. Deregistration 1 can represent deregistration of 3GPP access, deregistration 2 can represent deregistration of non-3GPP access, registration 1 can represent registration of 3GPP access, and registration 2 can represent registration of non-3GPP access. Some different scenarios of the deregistration process (steps (1) and (2)) can be described by 411-417. At 411, the UE can first initiate deregistration 1 and complete deregistration 1 before deregistration 2. At 412, the UE can first initiate deregistration 1 and complete deregistration 1 after deregistration 2, where deregistration 1 takes longer than deregistration 2. At 413, the UE can simultaneously initiate and complete deregistration 1 and deregistration 2, where deregistration 1 takes the same time as deregistration 2. At 414, the UE can simultaneously initiate deregistration 1 and deregistration 2 and complete deregistration 1 before deregistration 2. At 415, until deregistration 1 is completed, the UE can initiate deregistration 2. At 416, the UE can first initiate deregistration 1 and complete deregistration 1 and deregistration 2 at the same time. At 417, the UE may initiate deregistration 1 first and complete deregistration 1 before deregistration 2, where deregistration 1 and deregistration 2 are performed at the same time. Note that the order of deregistration 1 and deregistration 2 are interchangeable. Different scenarios of the registration process (steps (4) and (5)) may be described by 421-424, where the registration process is performed after or at the same time as step (3). At 421, the UE may first perform registration 1 and then perform registration 2 after registration 1 is completed. At 422, the UE may first perform registration 1 and then perform registration 2 sometime after registration 1 is completed. At 423, the UE may first perform registration 2 and then perform registration 1 after registration 2 is completed. At 424, the UE may first perform registration 2 and then perform registration 1 sometime after registration 2 is completed.

[0037] Figure 5A timing diagram for re-registering to the same PLMN / SNPN on both 3GPP and non-3GPP access types between a UE and a 5GS according to one novel aspect may be illustrated. In step 511, UE 501 may register to the same PLMN / SNPN in the 5GS via 3GPP and non-3GPP access. UE 501 may use / maintain a common 5G-GUTI in the same network. In step 521, UE 501 may receive a DL NAS transport message, in which the Payload Container Type IE may be set to "UE Parameter Update Transparent Container" and the Payload Container IE successfully passes the integrity check. In step 522, UE 501 may receive a Refresh Command from the UICC, with the REG bit of the UE Parameter Update header in the UE Parameter Update Transparent Container IE set to "Request Re-Registration." Accordingly, in step 531, UE 501 may determine that the UE needs to re-register with the network. In step 541, UE 501 may deregister from the 3GPP access. In step 542, UE 501 may deregister from the non-3GPP access. In step 543, after both deregistration processes are complete, UE 501 may delete the shared 5G-GUTI. In step 544, UE 501 may register with the PLMN / SNPN via the 3GPP access. In step 545, UE 501 may register with the same PLMN / SNPN via the non-3GPP access.

[0038] Figure 6 6 is a flowchart of a first method for re-registering to the same PLMN / SNPN through 3GPP access and non-3GPP access type according to a novel aspect of the present invention. In step 601, a UE may register to a PLMN / SNPN, wherein the UE may register to the same PLMN / SNPN through a first access type and a second access type. In step 602, the UE may determine that a condition triggering re-registration is satisfied. In step 603, the UE may perform a first deregistration through the first access type and a second deregistration through the second access type. In step 604, after completing the first deregistration and the second deregistration, the UE may perform a first registration through the first access type or a second registration through the second access type, or perform a first registration through the first access type and a second registration through the second access type.

[0039] Figure 77 is a flowchart of a second method for re-registering to the same PLMN / SNPN through 3GPP access and non-3GPP access type according to a novel aspect of the present invention. In step 701, the UE may register to the PLMN / SNPN, wherein the UE may register to the same PLMN / SNPM through a first access type and a second access type. In step 702, the UE may determine that a condition triggering re-registration is met. In step 703, the UE may perform a first deregistration through the first access type and a second deregistration through the second access type. In step 704, after the first deregistration and the second deregistration are completed, the UE may delete the shared GUTI. In step 705, after the shared GUTI is deleted, the UE may perform a first registration through the first access type or a second registration through the second access type, or perform a first registration through the first access type and a second registration through the second access type.

[0040] Please note that although some embodiments of the present invention may describe the solution of the present invention using a 5G network environment as an example, this is provided only as an example and is not restrictive. The present invention is not intended to limit the technical solution to a specific network environment. Those skilled in the art will understand that the inventive concept, inventive spirit, or technical solution of the present invention is also applicable to the future sixth generation (6G) th The present invention may be implemented in a 5G-GUTI (GUTI) environment, such as a 5G-GUTI (GUTI-5G), a 6G-GUTI (GUTI-6G), or any other suitable network environment.

[0041] Although the present invention is disclosed above in conjunction with specific embodiments for guidance purposes, the present invention is not limited thereto. Accordingly, various features of the above embodiments may be modified, adjusted, and combined without departing from the scope of the claims of the present invention.

Claims

1. A method for wireless communication, comprising: (a) a user equipment registers with a public land mobile network or a standalone non-public network, wherein the user equipment registers with the same public land mobile network or standalone non-public network via a first access type and a second access type, wherein after registering with the public land mobile network or the standalone non-public network, the user equipment maintains a first common globally unique temporary identifier; (b) determining that the conditions triggering re-registration are met; (c) performing a first deregistration via the first access type and performing a second deregistration via the second access type; and (d) After the first deregistration and the second deregistration in (c) are completed, the user equipment deletes the first common globally unique temporary identifier and then performs a first registration through the first access type or a second registration through the second access type, or performs a first registration through the first access type and a second registration through the second access type.

2. The method for wireless communication according to claim 1, wherein The user equipment receives a downlink non-access stratum transmission message including a user equipment parameter update header.

3. The method for wireless communication according to claim 2, wherein: When the user equipment receives a refresh command and the user equipment parameter update header indicates a request for re-registration, the trigger condition is met.

4. The method for wireless communication according to claim 1, wherein The first access type is 3GPP access and the second access type is non-3GPP access, or the first access type is non-3GPP access and the second access type is 3GPP access.

5. The method for wireless communication according to claim 1, wherein: After the user equipment deletes the first common globally unique temporary identifier, the user equipment performs the first registration or the second registration, or performs both the first registration and the second registration in (d).

6. A user equipment for wireless communication, comprising: a registration processing circuit to register with a public land mobile network or a standalone non-public network, wherein the user equipment is registered with the same public land mobile network or standalone non-public network via a first access type and a second access type, wherein after registering with the public land mobile network or standalone non-public network, the user equipment maintains a first common globally unique temporary identifier; The control circuit determines that a condition triggering re-registration is satisfied; and a deregistration processing circuit, performing a first deregistration through the first access type and performing a second deregistration through the second access type, After the first deregistration and the second deregistration are completed, the user equipment deletes the first shared globally unique temporary identifier, and then performs a first registration through the first access type or a second registration through the second access type, or performs a first registration through the first access type and a second registration through the second access type.

7. The user equipment according to claim 6, wherein: The user equipment receives a downlink non-access stratum transmission message including a user equipment parameter update header.

8. The user equipment according to claim 7, wherein: When the user equipment receives a refresh command and the user equipment parameter update header indicates a request for re-registration, the trigger condition is met.

9. The user equipment according to claim 6, wherein: The first access type is 3GPP access and the second access type is non-3GPP access, or the first access type is non-3GPP access and the second access type is 3GPP access.

10. The user equipment according to claim 6, wherein: After the user equipment deletes the first common globally unique temporary identifier, the user equipment performs the first registration or the second registration, or performs both the first registration and the second registration.

11. A method for wireless communication, comprising: (a) a user equipment is registered with a public land mobile network or an independent non-public network, wherein the user equipment is registered with the same public land mobile network or independent non-public network via a first access type and a second access type; (b) determining that the conditions triggering re-registration are met; (c) performing a first deregistration via the first access type and performing a second deregistration via the second access type; (d) after the first deregistration and the second deregistration in (c) are completed, deleting the shared globally unique temporary identifier; and (e) after deleting the common globally unique temporary identifier in (d), performing a first registration through the first access type or performing a second registration through the second access type, or performing a first registration through the first access type and performing a second registration through the second access type.

12. The method for wireless communication according to claim 11, wherein: The user equipment receives a downlink non-access stratum transmission message including a user equipment parameter update header.

13. The method for wireless communication according to claim 12, wherein: When the user equipment receives a refresh command and the user equipment parameter update header indicates a request for re-registration, the trigger condition is met.

14. The method for wireless communication according to claim 11, wherein: The first access type is 3GPP access and the second access type is non-3GPP access, or the first access type is non-3GPP access and the second access type is 3GPP access.

15. A user equipment for wireless communication, comprising: A processor, wherein when executing program instructions stored in a storage medium, the processor performs the steps of the method for wireless communication according to any one of claims 1-5 and 11-14. 16 . A storage medium storing program instructions, wherein when the program instructions are executed by a processor, the processor is caused to perform the steps of the method for wireless communication according to claim 1 .

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