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KR-102963069-B1 - Optimization of PDU session state usage in IE

KR102963069B1KR 102963069 B1KR102963069 B1KR 102963069B1KR-102963069-B1

Abstract

Systems and methods for managing the synchronization of protocol data unit (PDU) sessions between user equipment (UE) and a network are disclosed herein. In some embodiments, the determination of whether a message containing a PDU session state information element (IE) should be transmitted is based on prior messaging between peer entities of the network. In some embodiments, the determination that a peer entity is notified of a relevant PDU session state is made after an anticipated response message is received in response to the prior messaging. In some cases, when it is determined that each entity has a matching PDU session state, a response message without a PDU session state IE is transmitted from one entity to the peer entity. Cases involving failures detected in the network and cases where an entity activates a data radio bearer (DRB) of a PDU session that is inactive on its peer are also discussed.

Inventors

  • 코쉬타, 닐레쉬
  • 쿠마르, 아니케탄 라마크리쉬나 비자야
  • 쿠마르, 바산트
  • 키스, 크리즈티안
  • 프라카삼, 스리다르
  • 팡이, 프라딥

Assignees

  • 애플 인크.

Dates

Publication Date
20260512
Application Date
20210903
Priority Date
20201104

Claims (20)

  1. As a method of user equipment (UE), A step of receiving one of a notification request and mobile terminated (MT) paging from a network; A step of determining that a protocol data unit (PDU) session previously available in the above UE is no longer available in the above UE; A step of determining that a registration request message indicating that the above PDU session is no longer available in the UE has not been transmitted to the network; and A method comprising the step of transmitting to the network a message containing a PDU session state information element (IE) indicating that the PDU session is no longer available in the UE, based on a determination that the registration request message was not transmitted to the network.
  2. A method according to claim 1, wherein the message including the PDU session state IE is a service request message.
  3. In claim 1, the method wherein the message including the PDU session state IE is the registration request message.
  4. A method according to claim 1, wherein the determination that the PDU session is no longer available in the UE is based on the determination that the PDU session is not currently active in the UE.
  5. A method according to claim 1, wherein determining that the PDU session is no longer available in the UE is based on determining that the PDU session is disabled in the UE.
  6. A method according to claim 1, further comprising the step of determining that the network has been notified that the PDU session is no longer available to the UE based on the reception from the network of a response message corresponding to the message including the PDU session status IE.
  7. In paragraph 6, the above response message is a service acceptance message, method.
  8. In paragraph 6, the above response message is a registration acceptance message, method.
  9. In paragraph 1, A step of determining that the network has not been notified that the PDU session is no longer available to the UE, based on a failure to receive from the network a response message corresponding to the message including the PDU session status IE; and A method further comprising the step of transmitting to the network a second message including a second PDU session status IE indicating that the PDU session is no longer available to the UE, based on a determination that the network has not been notified that the PDU session is no longer available to the UE.
  10. As a method of user equipment (UE), A step of receiving one of a notification request and mobile end-of-life (MT) paging from a network; A step of determining that a protocol data unit (PDU) session previously available in the above UE is no longer available in the above UE; A step of determining that a registration request message indicating that the above PDU session is no longer available in the UE has not been transmitted to the network; A method comprising the step of transmitting a PDU session release request message for the PDU session to the network based on a determination that the registration request message was not transmitted to the network.
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Description

Optimization of PDU session state usage in IE The present application generally relates to wireless communication systems comprising wireless communication systems that maintain PDU session synchronization between user equipment (UE) and a network using messages containing protocol data unit (PDU) session state information elements (IEs). Wireless mobile communication technology transmits data between a base station and a wireless mobile device using various standards and protocols. Wireless communication system standards and protocols may include 3GPP (3rd Generation Partnership Project) LTE (long term evolution) (e.g., 4G) or New Radio (NR) (e.g., 5G); the IEEE (Institute of Electrical and Electronics Engineers) 802.16 standard, commonly known to industry groups as WiMAX (worldwide interoperability for microwave access); and the IEEE 802.11 standard for WLAN (wireless local area network), commonly known to industry groups as Wi-Fi. In 3GPP RANs (radio access networks) of LTE systems, base stations may include RAN nodes such as E-UTRAN (Evolved Universal Terrestrial Radio Access Network) Node B (also commonly referred to as Evolved Node B, Enhanced Node B, eNodeB, or eNB) and/or E-UTRAN's RNC (Radio Network Controller), which communicate with radio communication devices known as User Equipment (UE). In 5th generation (5G) radio RANs, RAN nodes may include 5G nodes, NR nodes (also referred to as next-generation Node B or g Node B (gNB)). RANs use radio access technology (RAT) to communicate between RAN nodes and UEs. RANs may include GSM (global system for mobile communications), GERAN (enhanced data rates for GSM evolution (EDGE) RAN), UTRAN (Universal Terrestrial Radio Access Network), and/or E-UTRAN, which provide access to communication services through the core network. Each RAN operates according to a specific 3GPP RAT. For example, GERAN implements GSM and/or EDGE RAT, UTRAN implements UMTS (universal mobile telecommunication system) RAT or other 3GPP RAT, E-UTRAN implements LTE RAT, and NG-RAN implements 5G RAT. In certain deployments, E-UTRAN may also implement 5G RAT. Frequency bands for 5G NR may be separated into two different frequency ranges. Frequency range 1 (FR1) may include frequency bands operating at sub-6 GHz frequencies, some of which are bands available under previous standards and may be extended to potentially cover new spectrum offerings from 410 MHz to 7125 MHz. Frequency range 2 (FR2) may include frequency bands from 24.25 GHz to 52.6 GHz. Bands within the millimeter wave (mmWave) range of FR2 may have smaller coverage than the bands within FR1 but may potentially have higher available bandwidth. Those skilled in the art will recognize that these frequency ranges provided as examples may change over time or zone by zone. To facilitate the identification of discussions regarding any specific element or action, the top digit or numbers of the drawing number refer to the drawing number where the element was first introduced. FIG. 1 illustrates a method of the UE according to an embodiment. FIG. 2 illustrates a method of the UE according to an embodiment. FIG. 3 illustrates a method of the UE according to an embodiment. FIG. 4 illustrates a method of the UE according to an embodiment. FIG. 5 illustrates a method of the UE according to an embodiment. FIG. 6 illustrates a method of AMF of a network according to an embodiment. FIG. 7 illustrates a method of the UE according to an embodiment. FIG. 8 illustrates a method of AMF of a network according to an embodiment. FIG. 9 illustrates a method of the UE according to an embodiment. FIG. 10 illustrates a method of the UE according to an embodiment. FIG. 11 illustrates a UE according to one embodiment. FIG. 12 illustrates a network node according to one embodiment. FIG. 13 illustrates an example of a service-based architecture according to certain embodiments. FIG. 14 illustrates components according to one embodiment. User Equipment (UE) and a network may communicate with each other using one or more Protocol Data Unit (PDU) sessions. A PDU session can be understood as comprising a logical connection between the UE and the network (e.g., a data radio bearer (DRB)). These PDU sessions may provide data delivery for communicating externally to the network. In other words, the UE may communicate with external entities using one or more PDUs with the network. PDU sessions may be established according to the protocol used to communicate data to external entities. For example, PDU sessions may be typed for use according to IP packets, Ethernet frames, or some other type of delivery array. In some RATs (e.g., NR), multiple simultaneous PDU sessions may be considered, such as between the UE and the network. These PDU sessions may include one or more active PDU sessions. An active PDU session may be a PDU session in which context is maintained on an associated system entity (e.g., UE and/or network) and may correspond to a DRB. This DRB of the acti