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JP-7856731-B2 - Enhanced redundant transmission in 5G networks

JP7856731B2JP 7856731 B2JP7856731 B2JP 7856731B2JP-7856731-B2

Inventors

  • リー，ホンクン
  • スターシニック，マイケル
  • リー，クアン
  • ムラディン，カタリナ
  • ニンレク，チーワン

Assignees

  • インターデイジタル パテント ホールディングス インコーポレイテッド

Dates

Publication Date
20260511
Application Date
20241202
Priority Date
20201125

Claims (16)

  1. A method performed by user equipment , A user equipment route selection policy (URSP) rule for associating application traffic with a packet data unit (PDU) session and detecting that application traffic is associated with redundant transmission, the URSP rule includes at least two route selection descriptors (RSDs), and the system receives the URSP rule. Using the first URSP rule, determine that the first application traffic for the first PDU session is associated with the first RSD and redundant transmission, Using a second URSP rule, determine that the second application traffic for the second PDU session is associated with the second RSD and the redundant transmission, Determining PDU session pair information (PSPI) to associate with a first message associated with the first PDU session and with a second message associated with the second PDU session, Sending the PSPI in the first message associated with the first PDU session, A method comprising sending the PSPI in the second message associated with the second PDU session.
  2. The method according to claim 1, wherein the application traffic is identified by a data network name or IP address.
  3. The first message includes a first PDU session establishment message, The method according to claim 1, wherein the second message includes a second PDU session establishment message.
  4. The first message is for establishing the first PDU session, The method according to claim 1, wherein the second message is for establishing the second PDU session.
  5. The method according to claim 1, wherein the PSPI is obtained via an AT command.
  6. The method according to claim 1, wherein the first PDU session and the second PDU session are associated with different combinations of data network names (DNNs) or single network slice selection support information (S-NSSAI).
  7. The method according to claim 1, wherein the PSPI is transmitted to the network management function.
  8. The method according to claim 1, wherein the PSPI includes an identifier.
  9. User equipment, Processor and The processor comprises a memory coupled to the processor, wherein the memory includes executable instructions stored in the memory, and when an instruction is executed by the processor, the processor: A user equipment route selection policy (URSP) rule for associating application traffic with a packet data unit (PDU) session and detecting that application traffic is associated with redundant transmission, the URSP rule includes at least two route selection descriptors (RSDs), and the system receives the URSP rule. Using the first URSP rule, determine that the first application traffic for the first PDU session is associated with the first RSD and redundant transmission, Using a second URSP rule, determine that the second application traffic for the second PDU session is associated with the second RSD and the redundant transmission, Determining PDU session pair information (PSPI) to associate with a first message associated with the first PDU session and with a second message associated with the second PDU session, Sending the PSPI in the first message associated with the first PDU session, A user device that causes the second message associated with the second PDU session to transmit the PSPI.
  10. The user device according to claim 9, wherein the application traffic is identified by a data network name or IP address.
  11. The first message includes a first PDU session establishment message, The user device according to claim 9, wherein the second message includes a second PDU session establishment message.
  12. The first message is for establishing the first PDU session, The user device according to claim 9, wherein the second message is for establishing the second PDU session.
  13. The user device according to claim 9, wherein the PSPI is obtained via an AT command.
  14. The user device according to claim 9, wherein the first PDU session and the second PDU session are associated with different combinations of data network names (DNNs) or single network slice selection support information (S-NSSAI).
  15. The user device according to claim 9, wherein the PSPI is transmitted to the network management function.
  16. The user device according to claim 9, wherein the PSPI includes an identifier.

Description

Cross-reference of related applications This application claims the interests of U.S. Provisional Patent Application No. 63/118,110, filed on 25 November 2020, entitled "Enhancement To Redundant Transmission In 5G Network," the contents of which are incorporated herein by reference. The 3rd Generation Partnership Project (3GPP) develops technical standards for mobile communication network technologies, including radio access, core transport networks, and service capabilities, including work on codecs, security, and quality of service. Recent radio access technology (RAT) standards include WCDMA (commonly referred to as 3G), LTE (commonly referred to as 4G), LTE-Advanced standards, and New Radio (NR), also referred to as "5G." 3GPP NR standard development is expected to continue and include the definition of next-generation radio access technology (New RAT), which is expected to include the provision of new flexible radio access below 7 GHz and new ultra-mobile broadband radio access above 7 GHz. Flexible radio access is expected to include new, non-backward compatible radio access in new spectrums below 6 GHz, and is expected to include different operating modes that can be multiplexed together in the same spectrum to address a wide range of 3GPP NR use cases with branching requirements. Ultra-mobile broadband is expected to include cmWave and mmWave spectrums, for example, providing opportunities for ultra-mobile broadband access for indoor applications and hotspots. In particular, ultra-mobile broadband is expected to share a common design framework with flexible radio access below 7 GHz, using centimeter-wave and millimeter-wave specific design optimizations. This background information is provided to clarify information that the applicant considers potentially relevant. It is not necessarily intended, nor should it be interpreted, to acknowledge that any of the prior information constitutes prior art. This specification discloses methods, systems, and devices relating to redundant transmission, PDU session establishment or modification processes, or URSP enhancement for UL traffic replication at the PDU layer for URLLC applications. In particular, several issues related to existing mechanisms enabling and supporting the redundant transmissions expressed herein are addressed. The disclosed subject matter may enhance redundant transmission mechanisms. This specification discloses the provision of policies and parameters to the network for supporting redundant transmission configurations. The relationship between RSN and redundant user plane requirements, as well as the list of parameters and policy rules provided from the PCF to the SMF for redundant transmission determination and configuration, are described in more detail. The AF may also provide input to the PCF, which may influence the parameters and policy rules. This specification discloses a procedure by which a UE provides PDU session pair information to the core network so that PDU session pair information can be provided to RAN nodes to enable dual connectivity-based redundant transmission. The format of the PSPI, the information contained in the PSPI, the procedure for PSPI generation and provisioning to RAN nodes, and how the UE can determine whether to make PDU sessions redundant based on instructions from the application layer are described in more detail. This specification discloses a method for modifying PDU sessions for redundant transmission. Possible triggers in different network entities (UE, RAN nodes, AF, and SMF), and procedures for continuing redundant transmission by disabling or stopping redundant transmission, or by replacing one of the PDU sessions within a session pair, are described in more detail. This specification discloses enhancements to URSP rules to enable the UE to perform traffic replication and elimination at the PDU layer. The subject of the UE being able to determine whether to utilize redundancy, and that this determination being made independently of the application layer, is explained in more detail. For example, the method may include: receiving configuration information for assigning packet data unit (PDU) session pair information (PSPI) to one or more PDU sessions; using the configuration information to determine that a first PDU session and a second PDU session are associated; associating the first PSPI with the first and second PDU sessions based on the configuration; sending the PSPI to the network in a first PDU session establishment message to establish the first PDU session; and sending the PSPI to the network in a second PDU session establishment message to establish the second PDU session. This summary is provided to introduce a selection of concepts in a simplified form, which is further described below in the “Modes for Carrying Out the Invention.” This summary is not intended to identify any major or essential features of the claimed subject matter, nor is it intended to be used to limit the scop