Methods and apparatus for performing initial registration in next-generation network in mobile communications
The proposed method allows 6G UEs to perform initial registration in next-generation networks by determining network type and using compatible NAS procedures, addressing registration rejections and ensuring seamless integration with legacy systems.
Patent Information
- Application Number
- PCT/CN2025/109232
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-07-18
- Filing Date
- 2025-07-18
- Publication Date
- 2026-01-22
AI Technical Summary
The challenge in current 3GPP specifications is the lack of defined procedures for initial registration of 6G user equipment (UE) in a next-generation network, particularly when coexisting with legacy 5G networks, leading to potential registration rejections due to incompatible signaling.
A method for 6G UE to determine the type of core network it is connected to and perform appropriate NAS procedures using compatible messages, including optional new information elements that legacy networks can ignore, and support protection of initial NAS messages as specified in 3GPP specifications.
Enables seamless initial registration of 6G UEs in both 6G and 5G networks, ensuring backward compatibility and effective interworking without registration rejections.
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Figure CN2025109232_22012026_PF_FP_ABST
Abstract
Description
METHODS AND APPARATUS FOR PERFORMING INITIAL REGISTRATION IN NEXT-GENERATION NETWORK IN MOBILE COMMUNICATIONSCROSS REFERENCE TO RELATED PATENT APPLICATION (S)
[0001] The present disclosure claims the priority benefit of U.S. Patent Application No. 63 / 672,774, filed 18 July 2024, the content of which herein being incorporated by reference in its entirety.TECHNICAL FIELD
[0002] The present disclosure is generally related to mobile communications and, more particularly, to performing initial registration in a next-generation network in mobile communications.BACKGROUND
[0003] In wireless communications such as mobile communications under the current 3rd Generation Partnership Project (3GPP) specification, in one deployment scenario a 6th Generation (6G) Core Network (6GC) may be an evolvement step of (legacy) 5th Generation (5G) Core Network (5GC) and referred to as an evolved 5G Core Network (e5GC) . With the same logic a 6th Generation System (6GS) may be called an evolved 5th Generation System (5GS) .
[0004] In the present disclosure, a 5G user equipment (UE) refers to a UE implementing 5G functions and protocols (e.g., 3GPP 23.501, 23.502, 24.501, 24.502) , capable of utilizing 5G services, and capable of accessing 5GC over a 5G 3GPP access network (NG-RAN) or a non-3GPP access network. Moreover, a 6G UE refers to a UE implementing 6G (6GC) functions and protocols defined by the 3GPP and is capable of utilizing 6G services and accessing 6GC over a 6G access network.
[0005] In certain scenarios, an evolved 5G Core Network (e5GC = 6GC / e5GS = 6GS) should serve also Rel-15-xx 5G UEs that are not 6G (or e5GC capable) . That is, all 6GC procedures including the initial registration procedure should work also for those legacy UEs. In certain plans, also, the legacy 5GC should also be able to serve 6G-capable UEs. Thus, an initial non-access-stratum (NAS) message sent to 5GC by a 6G UE should not include content (s) that would lead to a registration reject when the 6G UE is attempting registration in a 5GC. At the time of the present disclosure, specifics on now a UE can perform initial registration in a next-generation network have yet to be defined in the 3GPP specification. Therefore, there is a need for a solution of performing initial registration in a next-generation network in mobile communications.SUMMARY
[0006] The following summary is illustrative only and is not intended to be limiting in any way. That is, the following summary is provided to introduce concepts, highlights, benefits, and advantages of the novel and non-obvious techniques described herein. Select implementations are further described below in the detailed description. Thus, the following summary is not intended to identify essential features of the claimed subject matter, nor is it intended for use in determining the scope of the claimed subject matter.
[0007] An objective of the present disclosure is to propose solutions or schemes that address the issue (s) described herein. More specifically, various schemes proposed in the present disclosure are believed to provide solutions pertaining to performing initial registration in a next-generation network in mobile communications. It is believed that implementations of one or more of the schemes proposed herein may address or otherwise alleviate the issues described above.
[0008] In one aspect, a method may involve a UE determining whether a cell is connected to a first type of core network or a second type of core network. The method may also involve the UE performing a procedure based on a result of the determining by: (a) performing a first type of non-access-stratum (NAS) procedure using a first type of message to the cell responsive to determining that the cell is connected to the first type of core network; and (b) performing a second type of NAS procedure using a second type of message to the cell responsive to determining that the cell is connected to the second type of core network.
[0009] In another aspect, a method may involve a UE performing an initial NAS procedure with a network by transmitting an initial NAS message to the network. The initial NAS message may be backward compatible such that the initial NAS message comprises one or more optional new information elements (IEs) ignorable by the network in an event that: (i) the network comprises a previous-generation network only; and (ii) the UE comprises a next-generation UE.
[0010] It is noteworthy that, although the description provided herein may be in the context of certain radio access technologies, networks, and network topologies such as 5th Generation (5G) / New Radio (NR) , Beyond Fifth-Generation (B5G) and 6th Generation (6G) mobile communications, the proposed concepts, schemes and any variation (s) / derivative (s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies such as, for example and without limitation, 4G / Long-Term Evolution (LTE) , LTE-Advanced, LTE-Advanced Pro, Internet-of-Things (IoT) , Narrow Band Internet of Things (NB-IoT) , Industrial Internet of Things (IIoT) , vehicle-to-everything (V2X) , and non-terrestrial network (NTN) communications. Thus, the scope of the present disclosure is not limited to the examples described herein.BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of the present disclosure. The drawings illustrate implementations of the disclosure and, together with the description, serve to explain the principles of the disclosure. It is appreciable that the drawings are not necessarily in scale as some components may be shown to be out of proportion than the size in actual implementation in order to clearly illustrate the concept of the present disclosure.
[0012] FIG. 1 is a diagram of an example network environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
[0013] FIG. 2 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0014] FIG. 3 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0015] FIG. 4 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0016] FIG. 5 is a block diagram of an example communication system under a proposed scheme in accordance with the present disclosure.
[0017] FIG. 6 is a flowchart of a second example process under a proposed scheme in accordance with the present disclosure.
[0018] FIG. 7 is a flowchart of a second example process under a proposed scheme in accordance with the present disclosure. DETAILED DESCRIPTION OF PREFERRED IMPLEMENTATIONS
[0019] Detailed embodiments and implementations of the claimed subject matters are disclosed herein. However, it shall be understood that the disclosed embodiments and implementations are merely illustrative of the claimed subject matters which may be embodied in various forms. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that description of the present disclosure is thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art. In the description below, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations. Overview
[0020] Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and / or solutions pertaining to performing initial registration in a next-generation network in mobile communications. According to the present disclosure, a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
[0021] FIG. 1 illustrates an example network environment 100 in which various solutions and schemes in accordance with the present disclosure may be implemented. FIG. 2 ~ FIG. 7 illustrate examples of implementation of various proposed schemes in network environment 100 in accordance with the present disclosure. The following description of various proposed schemes is provided with reference to FIG. 1 ~ FIG. 7.
[0022] Referring to FIG. 1, network environment 100 involves a UE 110 (e.g., a 6G UE) and a UE 115 (e.g., a 5G UE) in wireless communication with a wireless network 120 (e.g., a 6G mobile network including an NTN and a TN) via a terrestrial network node 125 (e.g., an evolved Node-B (eNB) , a Next Generation Node-B (gNB) , or a transmission / reception point (TRP) ) and / or a non-terrestrial network node 128 (e.g., a satellite) . For example, the terrestrial network node 125 and / or the non-terrestrial network node 128 may form a non-terrestrial network (NTN) serving cell for wireless communication with UE 110 and UE 115. In some implementations, each of UE 110 and UE 115 may be an IoT device such as an NB-IoT UE or an enhanced machine-type communication (eMTC) UE (e.g., a bandwidth reduced low complexity (BL) UE or a coverage enhancement (CE) UE) . In such communication environment, UE 110, UE 115, network 120, terrestrial network node 125, and non-terrestrial network node 128 may implement various schemes pertaining to performing initial registration in a next-generation network in accordance with the present disclosure, as described below.
[0023] It is noteworthy that, while the various proposed schemes may be individually or separately described below, in actual implementations some or all of the proposed schemes may be utilized or otherwise implemented jointly. Of course, each of the proposed schemes may be utilized or otherwise implemented individually or separately. Moreover, as used herein, a lower layer may refer to a layer in the 5GMM protocol stack that is lower than the radio resource control (RRC) layer, such as a packet data convergence protocol (PDCP) layer, a radio control link (RLC) layer, a medium access control (MAC) layer, a physical (PHY) layer, or so forth.
[0024] Under a proposed scheme in accordance with the present disclosure with respect to updates to NAS signaling, an initial NAS message (e.g., REGISTRATION REQUEST) sent by a 6G UE (e.g., UE 110) may be backward compatible including only new optional information elements (IE) that a legacy (e.g., 5GC) network can ignore if included by the UE. Alternatively, the 6G UE, in response to determining a cell being not connected to a 6GC (but connected to 5GC) , may perform NAS procedures of a 5G style / type and send signaling of the 5G type to a 5G network. On the other hand, the 6G UE, in response to determining the cell being connected to the 6GC, may perform NAS procedures of a 6G style / type and provide messages of the 6G type to a 6G network.
[0025] Under the proposed scheme, the 6G UE may send a message with a new optional IE to the network to indicate some or all of the following information: (a) a new registration type (e.g., 6G registration type) ; and / or (b) a UE status with 6G specific information; and / or (c) UE 6G capability (s) .
[0026] Under the proposed scheme, a 6G registration type in the IE may indicate whether the UE is performing "initial registration" , "mobility / periodic registration" or "combined / / NG-RAN and 6G-RAN / dual-stack / dual initial registration" or "combined / / NG-RAN and 6G-RAN / dual-stack / dual mobility / periodic registration" .
[0027] Under the proposed scheme, the UE status in the IE may inform the network whether or not the UE is 6GC registered. This indication may be useful in case of dual-registration to different core networks.
[0028] Under the proposed scheme, the UE 6G capability (s) in the IE may indicate to the network with information concerning aspects of the 6G UE capability e.g., for interworking purposes.
[0029] Under a proposed scheme in accordance with the present disclosure with respect to protection of initial NAS signaling messages, a 6GS may support.
[0030] protection of initial NAS messages as specified in the 3GPP specification (s) . The protection of initial NAS messages may apply to the 6G type of REGISTRATION REQUEST, DEREGISTRATION REQUEST, SERVICE REQUEST and CONTROL PLANE SERVICE REQUEST messages, and may be achieved as described below.
[0031] In a first scenario (Scenario A) , in case that a 6G UE (e.g., UE 110) does not have a valid 6G NAS security context, the 6G UE may send a 6G REGISTRATION REQUEST message including cleartext IEs only. After activating a 6G NAS security context resulting from a security mode control procedure, the 6G UE may perform certain operation depending on whether or not the 6G UE needs to send non-cleartext IEs. For instance, in case that the 6G UE needs to send non-cleartext IEs, the 6G UE may include the entire 6G REGISTRATION REQUEST message (e.g., containing both cleartext IEs and non-cleartext IEs) in the NAS message container IE and may also include the NAS message container IE in the SECURITY MODE COMPLETE message. Conversely, in case that the 6G UE does not need to send non-cleartext IEs, the UE may include the entire 6G REGISTRATION REQUEST message (e.g., containing cleartext IEs only) in the NAS message container IE and may also include the NAS message container IE in the SECURITY MODE COMPLETE message.
[0032] In a second scenario (Scenario B) , in case that a UE has a valid 6G NAS security context, and in case that the UE needs to send non-cleartext IEs in a 6G REGISTRATION REQUEST, 6G DEREGISTRATION REQUEST, or 6G SERVICE REQUEST message, the UE may include the entire 6G REGISTRATION REQUEST, 6G DEREGISTRATION REQUEST or 6G SERVICE REQUEST message (e.g., containing both cleartext IEs and non-cleartext IEs) in the NAS message container IE and may also cipher the value part of the NAS message container IE. The UE may then send a 6G REGISTRATION REQUEST, 6G DEREGISTRATION REQUEST, or 6G SERVICE REQUEST message containing the cleartext IEs and the NAS message container IE to the network.
[0033] Under the proposed scheme, in case that the initial NAS message needs to be backward compatible for 5G, then when the initial NAS message is a REGISTRATION REQUEST message, the cleartext IEs may include one or more of the following: (1) extended protocol discriminator; (2) security header type; (3) spare half octet; (4) registration request message identity; (5) 5GS registration type (no change as needed for backward compatibility) ; (6) next-generation key set identifier (ngKSI) ; (7) 5GS mobile identity; (8) UE security capability (new security capabilities for 6G) ; (9) additional global unique temporary identity (GUTI) ; (10) UE status (probably needed information for intersystem change (5GC / S<-> 6GC / S) whether the UE is 6G registered) ; (11) Evolved Packet System (EPS) NAS message container; (12) network identity (NID) ; (13) public land mobile network (PLMN) with disaster condition; and / or (14) 6G / extended 5G registration type. (for additional information for 6G registration) .
[0034] Moreover, under the proposed scheme, when the initial NAS message is a 6G (type of) REGISTRATION REQUEST message sent to a 6G network, the cleartext IEs may include one or more of the following: (1) extended protocol discriminator; (2) security header type; (3) spare half octet; (4) 6G registration request message identity; (5) 6G registration type (no change as needed for backward compatibility) ; (6) 6gKSI; (7) 6G mobile identity; (8) UE 6G security capability (including 6G security capability or 5G and 6G security capability) ; (9) additional GUTI; (10) UE status (probably needed information for intersystem change (5GC / S<-> 6GC / S) whether the UE is 5G registered) ; and / or (11) 5GS NAS message container.
[0035] Under a proposed scheme in accordance with the present disclosure with respect to updates to IEs, there may be some new IEs and updates to existing IEs to support the above-described proposed schemes, as described below with reference to FIG. 2 ~ FIG. 4.
[0036] FIG. 2 illustrates an example design 200 under a proposed scheme in accordance with the present disclosure. Under the proposed scheme, the purpose of a 6G registration type IE is to indicate the type of the requested registration. As an illustrative example, the 6G registration type IE may be coded as shown in FIG. 2. Referring to FIG. 2, the 6G registration type may be a type 1 information element with a length of 1 octet.
[0037] FIG. 3 illustrates an example design 300 under a proposed scheme in accordance with the present disclosure. In 5GS, the purpose of the UE status IE is to provide the network with information concerning aspects of the current UE registration status which is used for interworking with EPS. Under the proposed scheme, in 6GS, the purpose of the UE status IE may additionally be to provide the network with information concerning aspects of the UE current 6G registration status which is used (e.g., for interworking with 5GS or other Core Network) . For instance, the UE status IE may indicate "UE is 6G REGISTERED" to inform the target network that the UE is "moving from 6G being 6G registered" Notably, in dual-registration the UE may have two serving Access and Mobility Management Functions (AMFs) and / or enhanced AMFs (eAMFs) (e.g., for different PLMNs) , and the Unified Data Management Function (UDM) may need to be informed by the UE / (e) AMF to know that two (e) AMFs are serving the UE, so that the UDM knows how to find the UE through which (e) AMF. As an illustrative example, the UE status IE may be coded as shown in FIG. 3. Referring to FIG. 3, the UE status IE may be a type 4 information element with a length of 3 octets.
[0038] FIG. 4 illustrates an example design 400 under a proposed scheme in accordance with the present disclosure. Under the proposed scheme, the UE 6G capability IE may be a new IE as part of the content of a REGISTRATION REQUEST message. The purpose of the 6G UE capability IE may be to provide the network with information concerning aspects of the 6G UE capability (e.g., for interworking purposes with 5GS, 6GC (maybe also EPS) ) . The contents of the 6G UE capability IE may affect the manner in which the network handles the operation of the UE. As an illustrative example, the 6G UE capability information element is coded as shown in FIG. 4. Referring to FIG. 4, the 6G UE capability IE may be a type 4 information element with a minimum length of 3 octets and a maximum length of xx octets (e.g., 3 octets) .
[0039] In view of the above, under a proposed scheme in accordance with the present disclosure with respect to a 6G registration procedure using a 6G REGISTRATION REQUEST message, a 6G-capable UE (e.g., UE 110) may determine, from the received (evolved 5G) system information, whether or not a cell on which the UE is camped is connected to a 6GC. In response to determining the cell is connected to a 6GC, the UE may start a registration (initial or mobility or periodic registration) procedure using the 6G type of REGISTRATION REQUEST message. In response to determining the cell is connected to a 5GC (which is not 6GC) , the UE may use a 5G type of REGISTRATION REQUEST message (e.g., as specified in 3GPP Technical Specification (TS) 24.501) . For further NAS signaling, during an ongoing registration procedure and / or after the registration is completed, the UE may use a 6G type of protocol messages and functions as far as the UE can determine it is connected to 6G network. Illustrative Implementations
[0040] FIG. 5 illustrates an example communication system 500 having at least an example apparatus 510 and an example apparatus 520 in accordance with an implementation of the present disclosure. Each of apparatus 510 and apparatus 520 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to performing initial registration in a next-generation network in mobile communications, including the various schemes described above with respect to various proposed designs, concepts, schemes, systems and methods described above, including network environment 100, as well as processes described below.
[0041] Each of apparatus 510 and apparatus 520 may be a part of an electronic apparatus, which may be a network apparatus or a UE (e.g., UE 110 or UE 115) , such as a portable or mobile apparatus, a wearable apparatus, a vehicular device or a vehicle, a wireless communication apparatus or a computing apparatus. For instance, each of apparatus 510 and apparatus 520 may be implemented in a smartphone, a smart watch, a personal digital assistant, an electronic control unit (ECU) in a vehicle, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer. Each of apparatus 510 and apparatus 520 may also be a part of a machine type apparatus, which may be an IoT apparatus such as an immobile or a stationary apparatus, a home apparatus, a roadside unit (RSU) , a wire communication apparatus or a computing apparatus. For instance, each of apparatus 510 and apparatus 520 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center. When implemented in or as a network apparatus, apparatus 510 and / or apparatus 520 may be implemented in an eNB in an LTE, LTE-Advanced or LTE-Advanced Pro network or in a gNB or TRP in a 5G / 6G network, or an IoT network.
[0042] In some implementations, each of apparatus 510 and apparatus 520 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more complex-instruction-set-computing (CISC) processors, or one or more reduced-instruction-set-computing (RISC) processors. In the various schemes described above, each of apparatus 510 and apparatus 520 may be implemented in or as a network apparatus or a UE. Each of apparatus 510 and apparatus 520 may include at least some of those components shown in FIG. 5 such as a processor 512 and a processor 522, respectively, for example. Each of apparatus 510 and apparatus 520 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and / or user interface device) , and, thus, such component (s) of apparatus 510 and apparatus 520 are neither shown in FIG. 5 nor described below in the interest of simplicity and brevity.
[0043] In one aspect, each of processor 512 and processor 522 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC or RISC processors. That is, even though a singular term “a processor” is used herein to refer to processor 512 and processor 522, each of processor 512 and processor 522 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure. In another aspect, each of processor 512 and processor 522 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and / or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure. In other words, in at least some implementations, each of processor 512 and processor 522 is a special-purpose machine specifically designed, arranged, and configured to perform specific tasks including those pertaining to performing initial registration in a next-generation network in mobile communications in accordance with various implementations of the present disclosure.
[0044] In some implementations, apparatus 510 may also include a transceiver 516 coupled to processor 512. Transceiver 516 may be capable of wirelessly transmitting and receiving data. In some implementations, transceiver 516 may be capable of wirelessly communicating with different types of wireless networks of different radio access technologies (RATs) . In some implementations, transceiver 516 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 516 may be equipped with multiple transmit antennas and multiple receive antennas for multiple-input multiple-output (MIMO) wireless communications. In some implementations, apparatus 520 may also include a transceiver 526 coupled to processor 522. Transceiver 526 may include a transceiver capable of wirelessly transmitting and receiving data. In some implementations, transceiver 526 may be capable of wirelessly communicating with different types of UEs / wireless networks of different RATs. In some implementations, transceiver 526 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 526 may be equipped with multiple transmit antennas and multiple receive antennas for MIMO wireless communications.
[0045] In some implementations, apparatus 510 may further include a memory 514 coupled to processor 512 and capable of being accessed by processor 512 and storing data therein. In some implementations, apparatus 520 may further include a memory 524 coupled to processor 522 and capable of being accessed by processor 522 and storing data therein. Each of memory 514 and memory 524 may include a type of random-access memory (RAM) such as dynamic RAM (DRAM) , static RAM (SRAM) , thyristor RAM (T-RAM) and / or zero-capacitor RAM (Z-RAM) . Alternatively, or additionally, each of memory 514 and memory 524 may include a type of read-only memory (ROM) such as mask ROM, programmable ROM (PROM) , erasable programmable ROM (EPROM) and / or electrically erasable programmable ROM (EEPROM) . Alternatively, or additionally, each of memory 514 and memory 524 may include a type of non-volatile random-access memory (NVRAM) such as flash memory, solid-state memory, ferroelectric RAM (FeRAM) , magnetoresistive RAM (MRAM) and / or phase-change memory.
[0046] Each of apparatus 510 and apparatus 520 may be a communication entity capable of communicating with each other using various proposed schemes in accordance with the present disclosure. For illustrative purposes and without limitation, a description of capabilities of apparatus 510, as a UE (e.g., UE 110 or UE 115) , and apparatus 520, as a network node (e.g., network node 125) of a network (e.g., wireless network 120 as a 5G / NR mobile network) , is provided below in the context of example processes 600 and 700. Illustrative Processes
[0047] FIG. 6 illustrates an example process 600 in accordance with an implementation of the present disclosure. Process 600 may represent an aspect of implementing various proposed designs, concepts, schemes, systems and methods described above. More specifically, process 600 may represent an aspect of the proposed concepts and schemes pertaining to performing initial registration in a next-generation network in mobile communications in accordance with the present disclosure. Process 600 may include one or more operations, actions, or functions as illustrated by one or more of blocks. Although illustrated as discrete blocks, various blocks of process 600 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks / sub-blocks of process 600 may be executed in the order shown in FIG. 6 or, alternatively, in a different order. Furthermore, one or more of the blocks / sub-blocks of process 600 may be executed repeatedly or iteratively. Process 600 may be implemented by or in apparatus 510 and apparatus 520 as well as any variations thereof. Solely for illustrative purposes and without limiting the scope, process 600 is described below in the context of apparatus 510 as a UE (e.g., UE 110 or UE 115) and apparatus 520 as a communication entity such as a network node (e.g., non-terrestrial network node 128 or terrestrial network node 125) of a network (e.g., wireless network 120) . Process 600 may begin at block 610.
[0048] At 610, process 600 may involve processor 512 of apparatus 510, as a UE (e.g., UE 110 or UE 115) , determining (e.g., based on received system information) whether a cell (on which the UE is camped) is connected to a first type of core network or a second type of core network. Process 600 may proceed from 610 to 620.
[0049] At 620, process 600 may involve processor 512 performing, via transceiver 516, a procedure based on a result of the determining. The procedure may be represented by 622 and 624.
[0050] At 622, process 600 may involve processor 512 performing a first type of NAS procedure using a first type of message to the cell in response to determining that the cell is connected to the first type of core network.
[0051] At 624, process 600 may involve processor 512 performing a second type of NAS procedure using a second type of message to the cell in response to determining that the cell is connected to the second type of core network.
[0052] In some implementations, the first type of core network may include a 5GC, the first type of NAS procedure may include a 5G NAS procedure, the first type of message may include a 5G type of REGISTRATION REQUEST message, the second type of core network may include a 6GC, the second type of NAS procedure may include a 6G NAS procedure, and the second type of message may include a 6G type of registration request message.
[0053] In some implementations, the second type of message may indicate one or more of the following: (i) a 6G registration type; (ii) a UE status with 5G-specific information for the 6GC; and (iii) a UE 6G capability. Moreover, the first type of message may indicate one or more of the following: (i) a UE status with 6G-specific information for the 5GC; and; and (ii) a UE 6G capability.
[0054] In some implementations, the 6G registration type may indicate whether or not the UE is performing an initial registration, a mobility or periodic registration, a combined or NG-RAN and 6G-RAN / dual-stack-dual initial registration, or a combined / / NG-RAN and 6G-RAN / dual-stack / dual mobility / periodic registration.
[0055] In some implementations, the UE status with 5G-specific information for the 6GC may indicate whether or not the UE is 5GC registered.
[0056] In some implementations, the UE status with 6G-specific information for the 5GC may indicate whether or not the UE is 6GC registered.
[0057] In some implementations, the UE 6G capability may provide information concerning aspects of one or more capabilities of the UE which is a 6G UE.
[0058] In some implementations, in performing the second type of NAS procedure, process 600 may involve processor 512 performing certain operations, in response to the UE not having any valid 6G NAS security context. For instance, process 600 may involve processor 512 transmitting an initial NAS message comprising the 6G type of registration request message containing cleartext IEs but not non-cleartext IEs. Moreover, after activating a 6G NAS security context, process 600 may involve processor 512 transmitting an entirety of the 6G type of registration request message which includes both the cleartext IEs and the non-cleartext IEs.
[0059] In some implementations, in an event that the initial NAS message is backward compatible for 5G, the cleartext IEs may include one or more of the following: (1) an extended protocol discriminator; (2) a security header type; (3) a spare half octet; (4) a registration request message identity; (5) a 5GS registration type; (6) a next-generation key set identifier (ngKSI) ; (7) a 5GS mobile identity; (8) a UE security capability; (9) an additional global unique temporary identity (GUTI) ; (10) a UE status; (11) an Evolved Packet System (EPS) NAS message container; (12) a network identity (NID) ; (13) a public land mobile network (PLMN) with disaster condition; and (14) a 6G / extended 5G registration type.
[0060] In some implementations, in an event that the initial NAS message is the 6G type of registration request message sent to a 6G network, the cleartext IEs may include one or more of the following: (1) an extended protocol discriminator; (2) a security header type; (3) a spare half octet; (4) a 6G registration request message identity; (5) a 6G registration type; (6) a 6th Generation key set identifier (6gKSI) ; (7) a 6G mobile identity; (8) a UE 6G security capability; (9) an additional GUTI; (10) a UE status; and (11) a 5GS NAS message container.
[0061] In some implementations, in response to determining that the cell is connected to the second type of core network, process 600 may involve processor 512 performing additional operations while the second type of NAS procedure is ongoing and after the second type of NAS procedure is completed. For instance, process 600 may involve processor 512 using one or more 6G type of protocol messages and functions in an event that the UE is connected to a 6G network.
[0062] FIG. 7 illustrates an example process 700 in accordance with an implementation of the present disclosure. Process 700 may represent an aspect of implementing various proposed designs, concepts, schemes, systems and methods described above. More specifically, process 700 may represent an aspect of the proposed concepts and schemes pertaining to performing initial registration in a next-generation network in mobile communications in accordance with the present disclosure. Process 700 may include one or more operations, actions, or functions as illustrated by one or more of blocks. Although illustrated as discrete blocks, various blocks of process 700 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks / sub-blocks of process 700 may be executed in the order shown in FIG. 7 or, alternatively, in a different order. Furthermore, one or more of the blocks / sub-blocks of process 700 may be executed repeatedly or iteratively. Process 700 may be implemented by or in apparatus 510 and apparatus 520 as well as any variations thereof. Solely for illustrative purposes and without limiting the scope, process 700 is described below in the context of apparatus 510 as a UE (e.g., UE 110 or UE 115) and apparatus 520 as a communication entity such as a network node (e.g., non-terrestrial network node 128 or terrestrial network node 125) of a network (e.g., wireless network 120) . Process 700 may begin at block 710.
[0063] At 710, process 700 may involve processor 512 of apparatus 510, as a UE (e.g., UE 110 or UE 115) , performing, via transceiver 516, an initial NAS procedure with a cell connected to a network by transmitting an initial NAS message to the network comprising a next-generation network (6G) or a previous-generation network (5G) or both. The initial NAS message may be backward compatible such that the initial NAS message comprises one or more optional new information elements (IEs) ignorable by the network in an event that: (i) the network comprises the previous-generation network only; and (ii) the UE comprises a next-generation UE.
[0064] In some implementations, the next-generation network includes a 5GC, the previous-generation network may include a 5GC, and the next-generation UE may include a 6G UE.
[0065] In some implementations, the initial NAS message may indicate one or more of the following: (i) a registration type with an additional 6G-specific information; (ii) a UE status with 6G-specific information; and (iii) a UE 6G capability.
[0066] In some implementations, the registration type with the additional 6G-specific information may indicate whether or not the UE is performing an initial registration, a mobility or periodic registration, a combined or NG-RAN and 6G-RAN / dual-stack-dual initial registration, or a combined / / NG-RAN and 6G-RAN / dual-stack / dual mobility / periodic registration.
[0067] In some implementations, the UE status with the additional 6G-specific information may indicate whether or not the UE is 6GC registered.
[0068] In some implementations, the UE 6G capability may provide information concerning aspects of one or more capabilities of the UE which is a 6G UE.
[0069] In some implementations, in performing the initial NAS procedure, process 700 may involve processor 512 performing certain operations in response to the UE not having any valid NAS security context. For instance, process 700 may involve processor 512 transmitting the initial NAS message comprising a REGISTRATION REQUEST message containing cleartext IEs but not non-cleartext IEs. Moreover, after activating the NAS security context, process 700 may involve processor 512 transmitting a NAS message container IE in a SECURITY MODE COMPLETE message. The NAS message container IE may include an entirety of the 6G REGISTRATION REQUEST message which includes both the cleartext IEs and the non-cleartext IEs.
[0070] In some implementations, in an event that the initial NAS message is backward compatible for 5G, the cleartext IEs may include at least one of the following: (1) an extended protocol discriminator; (2) a security header type; (3) a spare half octet; (4) a registration request message identity; (5) a 5GS registration type; (6) an ngKSI; (7) a 5GS mobile identity; (8) a UE security capability; (9) an additional GUTI; (10) a UE status; (11) an EPS NAS message container; (12) a NID; (13) a PLMN with disaster condition; and (14) a 6G / extended 5G registration type.
[0071] In some implementations, in an event that the initial NAS message is a 6G type of registration request message sent to the network which includes a 6GC, the cleartext IEs may include at least one of the following: (1) an extended protocol discriminator; (2) a security header type; (3) a spare half octet; (4) a 6G registration request message identity; (5) a 6G registration type; (6) a 6gKSI; (7) a 6G mobile identity; (8) a UE 6G security capability; (9) an additional GUTI; (10) a UE status; and (11) a 5GS NAS message container.
[0072] In some implementations, in response to determining that the cell is connected to the next-generation core network (e.g., 6GC) , process 700 may involve processor 512 performing additional operations while the NAS procedure is ongoing and after the NAS procedure is completed. For instance, process 700 may involve processor 512 using one or more 6G type of protocol messages and functions in an event that the UE is connected to a 6G network. Additional Notes
[0073] The herein-described subject matter sometimes illustrates different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely examples, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively "associated" such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as "associated with" each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being "operably connected" , or "operably coupled" , to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being "operably couplable" , to each other to achieve the desired functionality. Specific examples of operably couplable include but are not limited to physically mateable and / or physically interacting components and / or wirelessly interactable and / or wirelessly interacting components and / or logically interacting and / or logically interactable components.
[0074] Further, with respect to the use of substantially any plural and / or singular terms herein, those having skill in the art can translate from the plural to the singular and / or from the singular to the plural as is appropriate to the context and / or application. The various singular / plural permutations may be expressly set forth herein for sake of clarity.
[0075] Moreover, it will be understood by those skilled in the art that, in general, terms used herein, and especially in the appended claims, e.g., bodies of the appended claims, are generally intended as “open” terms, e.g., the term “including” should be interpreted as “including but not limited to, ” the term “having” should be interpreted as “having at least, ” the term “includes” should be interpreted as “includes but is not limited to, ” etc. It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to implementations containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an, " e.g., “a” and / or “an” should be interpreted to mean “at least one” or “one or more; ” the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should be interpreted to mean at least the recited number, e.g., the bare recitation of "two recitations, " without other modifiers, means at least two recitations, or two or more recitations. Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. In those instances where a convention analogous to “at least one of A, B, or C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. It will be further understood by those within the art that virtually any disjunctive word and / or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B. ”
[0076] From the foregoing, it will be appreciated that various implementations of the present disclosure have been described herein for purposes of illustration, and that various modifications may be made without departing from the scope and spirit of the present disclosure. Accordingly, the various implementations disclosed herein are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Claims
1.A method, comprising:determining, by a processor of a user equipment (UE) , whether a cell is connected to a first type of core network or a second type of core network; andperforming, by the processor, a procedure based on a result of the determining by:performing a first type of non-access-stratum (NAS) procedure using a first type of message to the cell responsive to determining that the cell is connected to the first type of core network; andperforming a second type of NAS procedure using a second type of message to the cell responsive to determining that the cell is connected to the second type of core network.2.The method of Claim 1, wherein:the first type of core network comprises a 5th Generation Core Network (5GC) ,the first type of NAS procedure comprises a 5th Generation (5G) NAS procedure,the first type of message comprises a 5G type of REGISTRATION REQUEST message,the second type of core network comprises a 6th Generation Core Network (6GC) ,the second type of NAS procedure comprises a 6th Generation (6G) NAS procedure, andthe second type of message comprises a 6G type of registration request message.3.The method of Claim 2, wherein:the second type of message indicates one or more of:a 6G registration type;a UE status with 5G-specific information for the 6GC; anda UE 6G capability,the first type of message indicates one or more of:a UE status with 6G-specific information for the 5GC; anda UE 6G capability.4.The method of Claim 3, wherein the 6G registration type indicates whether or not the UE is performing an initial registration, a mobility or periodic registration, a combined or next-generation radio access network (NG-RAN) and 6G radio access network (6G-RAN) / dual-stack-dual initial registration, or a combined / / NG-RAN and 6G-RAN / dual-stack / dual mobility / periodic registration.5.The method of Claim 3, wherein the UE status with 5G-specific information for the6GC indicates whether or not the UE is 5GC registered, wherein the UE status with 6G-specific information for the 5GC indicates whether or not the UE is 6GC registered.6.The method of Claim 3, wherein the UE 6G capability provides information concerning aspects of one or more capabilities of the UE which is a 6G UE.7.The method of Claim 2, wherein the performing of the second type of NAS procedure comprises, responsive to the UE not having any valid 6G NAS security context:transmitting an initial NAS message comprising the 6G type of registration request message containing cleartext information elements (IEs) but not non-cleartext IEs; andafter activating a 6G NAS security context, transmitting an entirety of the 6G type of registration request message which includes both the cleartext IEs and the non-cleartext IEs.8.The method of Claim 7, wherein, in an event that the initial NAS message is backward compatible for 5G, the cleartext IEs comprise one or more of:an extended protocol discriminator;a security header type;a spare half octet;a registration request message identity;a 5GS registration type;a next-generation key set identifier (ngKSI) ;a 5GS mobile identity;a UE security capability;an additional global unique temporary identity (GUTI) ;a UE status;an Evolved Packet System (EPS) NAS message container;a network identity (NID) ;a public land mobile network (PLMN) with disaster condition; anda 6G / extended 5G registration type.9.The method of Claim 7, wherein, in an event that the initial NAS message is the 6G type of registration request message sent to a 6G network, the cleartext IEs comprise one or more of:an extended protocol discriminator;a security header type;a spare half octet;a 6G registration request message identity;a 6G registration type;a 6th Generation key set identifier (6gKSI) ;a 6G mobile identity;a UE 6G security capability;an additional global unique temporary identity (GUTI) ;a UE status; anda 5GS NAS message container.10.The method of Claim 2, responsive to determining that the cell is connected to the second type of core network, further comprising, while the second type of NAS procedure is ongoing and after the second type of NAS procedure is completed:using one or more 6G type of protocol messages and functions in an event that the UE is connected to a 6G network.11.A method, comprising:performing, by a processor of a user equipment (UE) , an initial non-access-stratum (NAS) procedure with a cell connected to a network by transmitting an initial NAS message to the network,wherein the network comprises a next-generation network, a previous-generation network or both,wherein the initial NAS message is backward compatible such that the initial NAS message comprises one or more optional new information elements (IEs) ignorable by the network in an event that:the network comprises the previous-generation network only; andthe UE comprises a next-generation UE.12.The method of Claim 11, wherein:the next-generation network comprises a 6th Generation Core Network (6GC) ,the previous-generation network comprises a 5th Generation Core Network (5GC) , andthe next-generation UE comprises a 6th Generation (6G) UE.13.The method of Claim 11, wherein the initial NAS message indicates one or more of:a registration type with an additional 6G-specific information;a UE status with a 6G-specific information; anda UE 6G capability.14.The method of Claim 13, wherein the registration type with the additional 6G-specific information indicates whether or not the UE is performing an initial registration, a mobility or periodic registration, a combined or next-generation radio access network (NG-RAN) and 6G radio access network (6G-RAN) / dual-stack-dual initial registration, or a combined / / NG-RAN and 6G-RAN / dual-stack / dual mobility / periodic registration.15.The method of Claim 13, wherein the UE status with the 6G specific-information indicates whether or not the UE is 6th Generation Core Network (6GC) registered.16.The method of Claim 13, wherein the UE 6G capability provides information concerning aspects of one or more capabilities of the UE which is a 6G UE.17.The method of Claim 11, wherein the performing of the initial NAS procedure comprises, responsive to the UE not having any valid NAS security context:transmitting the initial NAS message comprising a REGISTRATION REQUEST message containing cleartext information elements (IEs) but not non-cleartext IEs; andafter activating the NAS security context, transmitting a NAS message container IE in a SECURITY MODE COMPLETE message,wherein the NAS message container IE includes an entirety of the REGISTRATION REQUEST message which includes both the cleartext IEs and the non-cleartext IEs.18.The method of Claim 17, wherein, in an event that the initial NAS message is backward compatible for 5G, the cleartext IEs comprise at least one of:an extended protocol discriminator;a security header type;a spare half octet;a registration request message identity;a 5GS registration type;a next-generation key set identifier (ngKSI) ;a 5GS mobile identity;a UE security capabilityan additional global unique temporary identity (GUTI) ;a UE status;an Evolved Packet System (EPS) NAS message container;a network identity (NID) ;a public land mobile network (PLMN) with disaster condition; anda 6G / extended 5G registration type.19.The method of Claim 17, wherein, in an event that the initial NAS message is a 6G type of registration request message sent to the network comprising a 6th Generation Core Network (6GC) , the cleartext IEs comprise at least one of:an extended protocol discriminator;a security header type;a spare half octet;a 6G registration request message identity;a 6G registration type;a 6th Generation key set identifier (6gKSI) ;a 6G mobile identity;a UE 6G security capability;an additional global unique temporary identity (GUTI) ;a UE status; anda 5GS NAS message container.20.The method of Claim 11, responsive to determining that the cell is connected to the 6GC, further comprising, while the NAS procedure is ongoing and after the NAS procedure is completed:using one or more 6G type of protocol messages and functions in an event that the UE is connected to a 6G network.
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