Method and user equipment for wireless communication

Abstract

An aspect of the present disclosure can provide a method for wireless communication. A UE can register to a 5GS in a wireless communication network over a 3GPP access, wherein the UE can receive power saving feature assistance information in a registration procedure, wherein the power saving feature can be PEIPS. The UE can establish an emergency PDU session over the 3GPP access. The UE can stop applying the power saving feature assistance information when the emergency PDU session is established. The UE can resume applying the power saving feature assistance information when the emergency PDU session successfully moves out of the 5GS 3GPP access. By utilizing the present disclosure, wireless communication can be better performed.

Description

Technical Field

[0001] This invention relates to wireless communication systems, and more particularly to an energy-efficient paging mechanism utilizing paging early indication (PEI) or wake-up signal (WUS) with auxiliary information for use in emergency Protocol Data Unit (PDU) sessions or in use in packet data network (PDN) connections for emergency bearer services (emergency PDN connections). Background Technology

[0002] The Third Generation Partnership Project (3GPP) and the Fifth Generation Partnership Project (5GPP) thGeneration 5G (5G) New Radio (NR) mobile telecommunications systems offer high data rates, low latency, and better system performance. In 3GPP NR, 5G terrestrial NR access networks (including multiple base stations, such as Next Generation Node-B (gNB)) communicate with multiple mobile stations called User Equipment (UE). Due to Orthogonal Frequency Division Multiple Access (OFDMA)'s robustness against multipath fading, higher spectral efficiency, and bandwidth scalability, OFDMA was chosen as the NR downlink (DL) radio access scheme. Multiple access in the downlink is achieved by allocating different subbands (i.e., subcarrier groups, denoted as Resource Blocks (RBs)) of the system bandwidth to each user based on their existing channel conditions. In Long Term Evolution (LTE) and NR networks, the Physical Downlink Control Channel (PDCCH) is used for downlink scheduling. The Physical Downlink Shared Channel (PDSCH) is used for downlink data. Similarly, the Physical Uplink Control Channel (PDSCH) is used for uplink data. The Physical Uplink Shared Channel (PUCCH) is used to carry uplink control information. The Physical Uplink Shared Channel (PUSCH) is used for uplink data. Additionally, the Physical Random-Access Channel (PRACH) is used for non-contention-based RACH.

[0003] A key use of broadcast information in cellular systems is to establish a communication channel between the UE and the gNB. This is commonly referred to as paging. Paging is the process used by a wireless network to locate the UE before an actual connection is established. Paging is used to alert the UE to an upcoming session (e.g., a mobile-terminated voice call or a downlink Internet Protocol (IP) packet). In most cases, paging processing occurs when the UE is in Radio Resource Control (RRC) idle or inactive mode. This means the UE needs to monitor whether the network is sending it a paging message and expends some energy to perform the aforementioned "monitoring" process. During idle / inactive mode, the UE enters and remains in a sleep mode defined in the Discontinuous Reception (DRX) cycle. The UE periodically wakes up and monitors the PDCCH to check for the presence of a paging message. If the PDCCH indicates that a paging message is to be transmitted in a subframe, the UE demodulates the paging channel to see if the paging message is directed to that UE.

[0004] In NR, paging reception consumes less than 2.5% of total power. However, due to the Synchronization Signal Block (SSB) transmission scheme in NR, LOOP operations (including Automatic Gain Control (AGC), Frequency Tracking Loop (FTL), and Time Tracking Loop (TTL)) and Measurement Assignment (MEAS) can only be performed at certain times. Therefore, the gap between the SSB used for LOOP / MEAS and the paging occasion (PO) is relatively long, and the UE may enter a light sleep mode during this gap. If there is an indication before paging, and the UE only monitors the PO when that indication is present, the UE can save not only paging reception power but also the power consumed during the light sleep mode between the last SSB and the PO.

[0005] In 5G Systems (5GS), the PEI (Paging Indication) notifies the UE of potentially relevant incoming paging, allowing the UE to skip POs (Profiles) in which the UE is (certainly) not paged, thus saving power (decoding POs consumes more power than decoding PEI). To this end, UE subgroups are introduced to allow waking up UE subgroups that may have relevant paging. The Radio Access Network (RAN) and the UE can use Paging Early Indication with Paging Subgrouping (PEIPS) to reduce UE power consumption during RRC idle and RRC inactivity in the NR. Paging subgroups can be assigned based on the UE's temporary identifier (ID) or Access and Mobility Management Function (AMF). Similar power-saving features can also be used in 4G Evolved Packet Systems (EPS) through the use of WUS.

[0006] When a UE establishes an active emergency PDU session or PDN connection (associated with 3GPP access), the UE behavior for power saving using PEIPS or WUS needs to be redefined. Summary of the Invention

[0007] A method can be provided to apply power-saving feature assistance information for emergency PDU sessions associated with 3GPP access or PDN connections used for emergency bearer services (emergency PDN connections). In 5GS, when a UE successfully establishes an emergency PDU session (associated with 3GPP access) after receiving the negotiated PEIPS assistance information IE in its last registration process, the UE may not use the PEIPS assistance information until it successfully completes the handover of the emergency PDU session from 3GPP access to non-3GPP access and / or successfully completes the transfer of the emergency PDU session from N1 mode to S1 mode (or from 5GS to EPS / ePDG connected to EPC). In EPS, when a UE successfully establishes an emergency PDN connection after receiving the negotiated WUS assistance information IE in its last registration (attach / TAU) process, the UE may not use the WUS assistance information until it successfully completes the handover of the emergency PDN connection from 3GPP access to non-3GPP access and / or successfully completes the transfer of the emergency PDN connection from S1 mode to N1 mode (or from EPC to 5GS).

[0008] A method for wireless communication includes: a user equipment registering to a fifth-generation system via a third-generation partner program access in a wireless communication network, wherein the user equipment receives power-saving feature assistance information during the registration process, wherein the power-saving feature is a paging advance indication with paging subgroups (PEIPS); establishing an emergency protocol data unit (EPU) session via the third-generation partner program access; stopping the application of the power-saving feature assistance information when the EPU session is established; and starting the application of the power-saving feature assistance information when the EPU session successfully leaves the fifth-generation system third-generation partner program access.

[0009] A method for wireless communication includes: a user equipment registering with an evolved packet system in a wireless communication network, wherein the user equipment receives power-saving feature assistance information during the registration process, wherein the power-saving feature is a wake-up signal; establishing a packet data network connection for emergency bearer service; stopping the application of the power-saving feature assistance information when the packet data network connection for the emergency bearer service is established; and starting the application of the power-saving feature assistance information when the packet data network connection for the emergency bearer service is successfully removed from the evolved packet system.

[0010] A user equipment (UE) for wireless communication includes: a registration processing circuit for registering with a fifth-generation system (G5) or an evolved cipher network (EPR) via a third-generation partner program (3GPP) access in a wireless communication network, wherein the UE receives power-saving feature assistance information during the registration process; a connection processing circuit for establishing an Emergency Protocol Data Unit (EPU) session in the G5 via the 3GPP access, or establishing a packet data network connection in the EPR for emergency bearer services; and a control and configuration circuit for stopping the application of the power-saving feature assistance information when the EPU session or the packet data network connection for the emergency bearer services is established; and for starting the application of the power-saving feature assistance information when the EPU session successfully leaves the G5 3GPP access, or the packet data network connection for the emergency bearer services successfully leaves the EPR.

[0011] By utilizing this invention, wireless communication can be improved.

[0012] Other embodiments and advantages will be described in the detailed description below. This invention is not intended to be defined. The invention is defined by the claims. Attached Figure Description

[0013] The accompanying drawings illustrate embodiments of the invention, wherein the same numbers may represent the same components.

[0014] Figure 1 Examples can be illustrated by utilizing PEI for paging reception in 5G NR networks for power saving and by applying PEIPS auxiliary information, based on novel aspects.

[0015] Figure 2 This is a simplified block diagram of a UE and a base station according to various embodiments of the present invention.

[0016] Figure 3 Examples can be given of PDU session handover and transfer between 5GS 3GPP / non-3GPP access and Evolved Packet Core (EPC) 3GPP / non-3GPP access.

[0017] Figure 4 Examples can be given of the handover and transfer of PDN connections between EPC 3GPP / non-3GPP access and 5GS 3GPP / non-3GPP access.

[0018] Figure 5 A timing diagram illustrating the reception, suspension, and resumption of PEIPS auxiliary information between the UE and the 5GS network in a novel aspect can be provided.

[0019] Figure 6 A timing diagram illustrating the reception, suspension, and resumption of WUS auxiliary information between the UE and the EPS network in a novel aspect can be provided.

[0020] Figure 7 This is a flowchart of a method for suspending and resuming PEIPS auxiliary information in a 5G / NR network according to a novel aspect of the present invention.

[0021] Figure 8 This is a flowchart of a method for suspending and resuming WUS auxiliary information in a 4G EPS network according to a novel aspect of the present invention. Detailed Implementation

[0022] The present invention will now be described in detail with reference to some embodiments thereof, examples of which are illustrated in the accompanying drawings.

[0023] Figure 1Examples of novel approaches include utilizing PEI for paging reception in a 5G NR network 100 for power saving and applying PEIPS auxiliary information. In 3GPP NR and 5G NR access networks, multiple base stations (e.g., gNBs) can communicate with multiple mobile stations referred to as UEs. OFDMA can be chosen as the NR downlink radio access scheme due to its robustness to multipath fading, higher spectral efficiency, and bandwidth scalability. In LTE and NR networks, PDCCH can be used for downlink scheduling. PDSCH can be used for downlink data. Similarly, PUCCH can be used to carry uplink control information. PUSCH can be used for uplink data. Furthermore, PRACH can be used for non-contention-based RACH.

[0024] In 5G systems, PEI can notify the UE of potentially relevant incoming paging, allowing the UE to skip POs in which the UE is (certainly) not paged, thus saving power (decoding POs consumes more power than decoding PEI). Figure 1 The SSB transmission scheme in NR can be illustrated, where LOOP operations (including AGC, FTL, and TTL) and measurements (MEAS) can only be performed at certain times, such as during an SSB burst. The UE can wake up to receive an SSB, for example, every 20 milliseconds (every two radio frames). The UE can enter a light sleep mode during the gap between the SSB and PO used for LOOP / MEAS. When a PEI is introduced, if the PEI indicates negation, the UE can skip PO monitoring; for example, the UE can enter deep sleep during the gap between the PEI and PO. PEI can always be transmitted, and the PEI can be located near the SSB burst, thus saving power not only for PO monitoring but also for light sleep and state transitions when no UE is paged. Besides the SSB, the UE may or may not need additional time for PEI monitoring.

[0025] exist Figure 1 In this context, PEI 112 can be adjacent to SSB burst 111. If the PEI indicates that no UE in the UE group is being paged (PEI is negative), the UE can enter deep sleep in 113; for example, the UE can enter deep sleep during the gap between PEI and PO. Furthermore, UE paging subgroups can be introduced to allow waking up UE subgroups that may have relevant paging requests. RAN and UE can use PEIPS to reduce UE power consumption during RRC idle and RRC inactivity in NR. Paging subgroups can be based on the UE's temporary ID or network-assigned paging subgroups. Similar power-saving features can also be used in 4G EPS through the use of WUS.

[0026] According to a novel aspect, a method for applying power-saving feature assistance information can be provided. In step 121, the UE can register to 5GS / EPS and receive power-saving assistance information. In step 122, the UE can establish an emergency PDU session in 5GS or an emergency PDN connection in EPS via 3GPP access. In step 123, the UE can stop (pause) using the power-saving assistance information. In step 124, the UE can start (resume) using the power-saving assistance information. In 5GS, when the UE successfully establishes an emergency PDU session (associated with 3GPP access) after receiving the Negotiated PEIPS assistance information Information Element (IE) in the last registration process, the UE can use the PEIPS assistance information after successfully completing the handover of the emergency PDU session from 3GPP access to non-3GPP access and / or after successfully completing the transfer of the emergency PDU session from N1 mode to S1 mode (or 5GS to EPC). In EPS, when a UE successfully establishes an emergency PDN connection (associated with 3GPP access) after receiving the negotiated WUS assistance information IE during its last registration (attach / tracking area update, TAU) process, the UE can use the WUS assistance information after successfully completing the handover from the emergency PDN connection to non-3GPP access and / or successfully completing the transfer of the emergency PDN connection from S1 mode to N1 mode (or from EPC to 5GS). When the UE is in the midst of an emergency session, power saving is no longer important, so the UE can deactivate power-saving features.

[0027] Figure 2 This is a simplified block diagram of wireless devices 201 and 211 according to embodiments of the present invention. For wireless device 201 (e.g., a base station), antennas 207 and 208 can transmit and receive radio signals. A radio frequency (RF) transceiver module 206 can be coupled to the antennas, receive RF signals from the antennas, convert the RF signals into baseband signals, and send the baseband signals to processor 203. RF transceiver 206 can also convert the received baseband signals from the processor into RF signals and transmit them to antennas 207 and 208. Processor 203 can process the received baseband signals and invoke different functional modules and circuits to execute features in wireless device 201. Storage medium 202 can store program instructions and data 210 to control the operation of device 201.

[0028] 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 send the baseband signals to processor 213. RF transceiver 216 can also convert the received baseband signals from the processor into RF signals and transmit them through antennas 217 and 218. Processor 213 can process the received baseband signals and invoke different functional modules and circuits to execute features in wireless device 211. Storage medium 212 can store program instructions and data 220 to control the operation of wireless device 211.

[0029] Wireless devices 201 and 211 may also include functional modules and circuits that can be implemented and configured to perform embodiments of the present invention. Figure 2 In the example, wireless device 201 may be a base station including an RRC connection processing module 205, a scheduler 204, a paging and mobility management module 209, and a control and configuration circuit 221. Wireless device 211 may be a UE including a connection processing module 215, a measurement and reporting module 214, a paging and mobility processing module 219, and a control and configuration circuit 231. Note that a wireless device can be both a transmitting device and a receiving device. Different functional modules and circuits can be implemented and configured by software, firmware, hardware, and any combination thereof. When the above-described functional modules and circuits are executed by processors 203 and 213 (e.g., by executing program codes 210 and 220), the base station 201 and user equipment 211 can perform embodiments of the present invention.

[0030] In one example, base station 201 can establish a connection for UE 211 via connection processing circuitry 205, schedule downlink and uplink transmissions for UE via scheduler 204, perform paging, mobility, and handover management via paging and mobility management module 209, and provide paging, measurement, and measurement report configuration information to UE via configuration circuitry 221. UE 211 can process the connection via connection processing circuitry 215, perform measurement and report measurement results via measurement and reporting module 214, perform paging monitoring and mobility via paging and mobility processing module 219, and obtain and apply configuration information (and / or power-saving feature auxiliary information) via control and configuration circuitry 231. In a novel aspect, UE 211 can receive power-saving auxiliary information and monitor PO accordingly. UE 211 can stop using auxiliary information for emergency connections on 3GPP access, and can start using auxiliary information when emergency connections are moved out of 5GS 3GPP access or EPS 3GPP access.

[0031] Figure 3Examples of PDU session handover and transfer between 5GS 3GPP / non-3GPP access and EPC 3GPP / non-3GPP access can be illustrated. In 5GS, a PDU session can be associated with 3GPP access (301) or non-3GPP access (302). When a PDU session is established in NR or in an EUTRA connected to 5GS via 3GPP access, the PDU session can be considered associated with 3GPP access. Depending on the scenario, the PDU session can be handover or transfer. In 311, the PDU session can be handover to 5GS non-3GPP access (without paging process). In 312, the PDU session can be transferred to 4G EPS (meaning 3GPP access), for example, to an EUTRA connected to an EPC (including both 3GPP and non-3GPP access). In 313, the PDU session can be transferred to 4G non-3GPP access, for example, to an evolved packet gateway (ePDG) connected to an EPC. The PDU session mentioned above can be a regular PDU session or an emergency PDU session.

[0032] Figure 4 Examples of PDN connection switching and transfer between EPC 3GPP / non-3GPP access and 5GS 3GPP / non-3GPP access can be illustrated. In the EPC, a PDN connection can be associated with 3GPP access (401) or with non-3GPP access (402). When a PDN connection is established in the EPS (EUTRA connected to the EPC) via 3GPP access, the PDN connection can be considered associated with 3GPP access. Depending on the scenario, the PDN connection can be switched or transferred. In 411, the PDN connection can be switched to EPS non-3GPP access (ePDG connected to the EPC). In 412, the PDN connection can be transferred to 5GS 3GPP access. In 413, the PDN connection can be transferred to 5GS non-3GPP access. The aforementioned PDN connections can be regular PDN connections or emergency PDN connections.

[0033] Figure 5A timing diagram illustrating the reception, suspension, and resumption of PEIPS auxiliary information between the UE and the 5GS network in a novel aspect can be illustrated. In step 511, UE 501 registers with the 5GS network via 3GPP access. During the final registration process, UE 501 obtains power-saving feature auxiliary information (IE). In 5GS, the power-saving feature can be PEIPS (NR), and the power-saving feature auxiliary information can be PEIPS (NR) auxiliary information, which may include a paging advance indicator for power-saving paging timing monitoring. In step 512, UE 501 can monitor paging based on the PEIPS auxiliary information to save power. In step 521, an emergency PDU session can be successfully established via 3GPP access, and the UE and network (AMF) do not use the PEIPS auxiliary information until a subsequent event. In step 522, UE 501 can stop (suspend) the use of the PEIPS auxiliary information.

[0034] Then, UE 501 can detect an event in which an emergency PDU session occurs. This event may include: 1) the PDU session release process for the emergency PDU session is successfully completed; 2) if the emergency PDU session is released locally by the UE or the network, the UE receives PEIPS assistance information with the PDU session state IE during the registration process or upon successful completion of the service request process; 3) the handover of the emergency PDU session from 3GPP to non-3GPP access is successfully completed; or 4) the emergency PDU session in 5GS is successfully transferred to EPS (EUTRAN) or connected to an ePDG (EPC+ePDG) connected to an EPC (since PEIPS is only applicable to NR). For example, in step 531, UE 501 can determine that the emergency PDU session has been switched (to non-3GPP) or transferred (to EPC). Accordingly, in step 532, UE 501 can begin (restore) the use of PEIPS assistance information.

[0035] Figure 6A timing diagram illustrating the reception, suspension, and resumption of WUS auxiliary information between the UE and the EPS network in a novel aspect can be illustrated. In step 611, UE 601 registers with the EPS network via 3GPP access. During the final registration (attach / TAU) process, UE 601 obtains power-saving feature auxiliary information (IE). In EPS, the power-saving feature can be WUS, and the power-saving feature auxiliary information can be WUS auxiliary information, which may include signals for power-saving paging timing monitoring. In step 612, UE 601 can monitor paging based on the WUS auxiliary information to save power. In step 621, an emergency PDN connection can be successfully established via 3GPP access, and the UE and the network (Mobility Management Entity (MME)) can discontinue using WUS auxiliary information until a subsequent event. Accordingly, in step 622, UE 601 can stop (suspend) the use of WUS auxiliary information.

[0036] Then, UE 601 can detect an event in which an emergency PDN connection occurs. This event may include: 1) the Packet Data Protocol (PDP) connection release process for the emergency PDN connection successfully completes; 2) if the UE or network locally releases the emergency PDN connection, the UE receives WUS assistance information with the EPS bearer context status (IE) during the registration process or upon successful completion of the service request process; 3) the handover of the emergency PDN connection from 3GPP to non-3GPP access is successfully completed; or 4) the emergency PDN connection in EPS is successfully transferred to 5GS 3GPP or 5GS non-3GPP. For example, in step 631, UE 601 can determine that the emergency PDN connection has been switched (to EPC non-3GPP) or transferred (to 5GS). Accordingly, in step 632, UE 601 can begin (restore) the use of WUS assistance information.

[0037] Figure 7 This is a flowchart of a method for suspending and resuming PEIPS auxiliary information in a 5G / NR network according to a novel aspect of the present invention. In step 701, the UE can register with the 5GS via 3GPP access in the wireless communication network, wherein the UE can receive power-saving feature auxiliary information during the registration process, wherein the power-saving feature may be PEIPS. In step 702, the UE can establish an emergency PDU session via 3GPP access. In step 703, when the emergency PDU session is established, the UE can stop applying the power-saving feature auxiliary information. In step 704, when the emergency PDU session successfully leaves the 5GS 3GPP access, the UE can resume applying the power-saving feature auxiliary information.

[0038] Figure 8 This is a flowchart of a method for suspending and resuming WUS auxiliary information in a 4G EPS network according to a novel aspect of the present invention. In step 801, the UE can register with the EPS via 3GPP access in the wireless communication network, wherein the UE can receive power-saving feature auxiliary information during the registration process, where the power-saving feature may be WUS. In step 802, the UE can establish a PDN connection for emergency bearer services. In step 803, when the PDN connection for emergency bearer services is established, the UE can stop applying the power-saving feature auxiliary information. In step 804, when the PDN connection for emergency bearer services successfully leaves the EPS (EPC 3GPP access), the UE can begin applying the power-saving feature auxiliary information.

[0039] While the present invention has been disclosed above with reference to specific embodiments for guidance purposes, the invention is not limited thereto. Accordingly, various modifications, adjustments, and combinations can be made to the various features of the above embodiments without departing from the scope set forth in the claims of the present invention.

Claims

1. A method for wireless communication, comprising: In a wireless communication network, a user equipment registers to a fifth-generation system through a third-generation partner program, wherein the user equipment receives power-saving feature assistance information during the registration process, wherein the power-saving feature is a paging advance indication with paging subgroups (PEIPS). Establish an emergency protocol data unit session through the aforementioned third-generation partner program; When the emergency protocol data unit session is established, the application of the power-saving feature auxiliary information is stopped; as well as When the emergency protocol data unit session successfully switches from the fifth-generation system third-generation partner program access to a non-third-generation partner program access, the power-saving feature auxiliary information is applied.

2. The method for wireless communication of claim 1, wherein, The power-saving feature auxiliary information is PEIPS auxiliary information that instructs the user equipment to listen for advance paging instructions.

3. The method for wireless communication as described in claim 1, characterized in that, PEIPS auxiliary information includes paging subgroup identifiers.

4. The method for wireless communication of claim 3, wherein, The paging subgroup identifier is assigned by the fifth-generation system network.

5. A method for wireless communication, comprising: In a wireless communication network, a user equipment registers to a fifth-generation system through a third-generation partner program, wherein the user equipment receives power-saving feature assistance information during the registration process, wherein the power-saving feature is a paging advance indication with paging subgroups (PEIPS). Establish an emergency protocol data unit session through the aforementioned third-generation partner program; When the emergency protocol data unit session is established, the application of the power-saving feature auxiliary information is stopped; as well as When the emergency protocol data unit session is successfully transferred from the fifth-generation system to the evolved packet system, the power-saving feature auxiliary information is applied.

6. The method for wireless communication of claim 5, wherein, The power-saving feature auxiliary information is PEIPS auxiliary information that instructs the user equipment to listen for advance paging instructions.

7. The method for wireless communication of claim 5, wherein, PEIPS auxiliary information includes paging subgroup identifiers.

8. The method for wireless communication as described in claim 7, characterized in that, The paging subgroup identifier is assigned by the fifth-generation system network.

9. A method for wireless communication, comprising: In a wireless communication network, a user equipment registers to a fifth-generation system through a third-generation partner program, wherein the user equipment receives power-saving feature assistance information during the registration process, wherein the power-saving feature is a paging advance indication with paging subgroups (PEIPS). Establish an emergency protocol data unit session through the aforementioned third-generation partner program; When the emergency protocol data unit session is established, the application of the power-saving feature auxiliary information is stopped; as well as When the Emergency Protocol Data Unit session is successfully transferred from the fifth-generation system to the Evolved Packet Gateway connected to the Evolved Packet Core, the power-saving feature assistance information is applied.

10. The method for wireless communication of claim 9, wherein, The power-saving feature auxiliary information is PEIPS auxiliary information that instructs the user equipment to listen for advance paging instructions.

11. The method for wireless communication of claim 9, wherein, PEIPS auxiliary information includes paging subgroup identifiers.

12. The method for wireless communication of claim 11, wherein, The paging subgroup identifier is assigned by the fifth-generation system network.

13. A user equipment for wireless communication, comprising: The registration processing circuit, in a wireless communication network, accesses and registers to a fifth-generation system or an evolved packet system via the third-generation partner program, wherein the user equipment receives power-saving feature auxiliary information during the registration process; The connection processing circuit establishes an emergency protocol data unit session in the fifth-generation system through the third-generation partner program. as well as The control and configuration circuit stops applying the power-saving feature auxiliary information when the emergency protocol data unit session is established; And when the emergency protocol data unit session successfully switches from the fifth-generation system third-generation partner program access to a non-third-generation partner program access, the power-saving feature auxiliary information is applied.

14. The user equipment of claim 13, wherein, In the fifth-generation system, the power-saving feature is Paging Advance Indication with Paging Subgroup (PEIPS), and the power-saving feature auxiliary information is PEIPS auxiliary information.

15. A user equipment for wireless communication, comprising: The registration processing circuit, in a wireless communication network, accesses and registers to a fifth-generation system or an evolved packet system via the third-generation partner program, wherein the user equipment receives power-saving feature auxiliary information during the registration process; The connection processing circuit establishes an emergency protocol data unit session in the fifth-generation system through the third-generation partner program. as well as The control and configuration circuit stops applying the power-saving feature auxiliary information when the emergency protocol data unit session is established; And when the Emergency Protocol Data Unit session is successfully transferred from the fifth generation system to the evolved packet system, the power-saving feature auxiliary information is applied.

16. The user equipment as claimed in claim 15, characterized in that, The power-saving feature is Paging Advance Indication with Paging Subgroup (PEIPS), and the power-saving feature auxiliary information is PEIPS auxiliary information.

17. A user equipment for wireless communication, comprising: The registration processing circuit, in a wireless communication network, accesses and registers to a fifth-generation system or an evolved packet system via the third-generation partner program, wherein the user equipment receives power-saving feature auxiliary information during the registration process; The connection processing circuit establishes an emergency protocol data unit session in the fifth-generation system through the third-generation partner program. as well as The control and configuration circuit stops applying the power-saving feature auxiliary information when the emergency protocol data unit session is established; And when the Emergency Protocol Data Unit session is successfully transferred from the fifth-generation system to the Evolved Packet Gateway connected to the Evolved Packet Core, the power-saving feature assistance information is applied.

18. The user equipment of claim 17, wherein, The power-saving feature is Paging Advance Indication with Paging Subgroup (PEIPS), and the power-saving feature auxiliary information is PEIPS auxiliary information.

19. A user equipment for wireless communication, comprising: A processor, when executing program instructions stored in a storage medium, performs the steps of the method for wireless communication as described in any one of claims 1-12.

20. A storage medium storing program instructions that, when executed by a processor, cause the processor to perform the steps of the method for wireless communication according to any one of claims 1-12.

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